CN111536170A

CN111536170A - Normally closed brake with superimposed braking

Info

Publication number: CN111536170A
Application number: CN202010457972.9A
Authority: CN
Inventors: 杨国平
Original assignee: Changsha Yachuang Intelligent Technology Co ltd
Current assignee: Changsha Yachuang Intelligent Technology Co ltd
Priority date: 2020-05-27
Filing date: 2020-05-27
Publication date: 2020-08-14

Abstract

Normally closed brake with superimposed braking. The electric pushing device (2) comprises a push rod device (4), a motor (5) and a one-way control mechanism (9), a rotating shaft in a transmission system of the electric pushing device is provided with a motor shaft (5a), a threaded rotating shaft (4a) in the push rod device (4) and a connecting shaft (9a) in the one-way control mechanism (9), and the connecting shaft (9a) is connected with the motor shaft and the inner end of the threaded rotating shaft in a multiple matching mode; a first brake spring component (7) and a second brake spring component (16) are arranged in the push rod device to form a two-stage brake force source component, and the end part of the electric push rod device is provided with a connecting lug (8a) which is hinged with a brake arm driving end (3c) in the brake mechanism (1). The first brake spring component realizes primary braking, the second brake spring component realizes superposition braking, the defect that the braking effect is influenced when the braking gap is increased in the prior art can be overcome, the reliability and the stability of the braking effect are improved, and the maintenance workload is reduced.

Description

Normally closed brake with superimposed braking

The technical field is as follows:

the invention relates to a normally closed brake, in particular to a normally closed brake with superposition braking.

Background art:

the normally closed brake mainly comprises a brake mechanism and a driving device. Fig. 1 is a schematic structural diagram of a conventional normally closed brake, which includes a braking mechanism 1 'and an electric pushing device 2'; the brake mechanism 1 'comprises symmetrically arranged brake arms 3', the two brake arms 3 'are respectively connected with two fixed component hinge shafts on the machine base to form a fulcrum Z' of the brake arms, the brake arms 3 'can swing around the fulcrum Z', one end of each brake arm 3 'is a brake end 3 a', the other end of each brake arm is a drive end 3c ', the brake ends 3 a' of the two brake arms 3 'are provided with brake components 3 b' with symmetrical structures, and the inner sides of brake blocks on the brake components 3b 'are provided with brake friction plates 3 d'; the electric pushing device 2 'comprises a pushing rod device 4', a motor 5 'and a speed reducing mechanism 6'; the rotating shaft in the transmission system of the electric pushing device 2 ' comprises a motor shaft 5a ', an input shaft 6a ' and an output shaft 6b ' of a speed reducing mechanism 6 ', and a threaded rotating shaft 4a ' of the pushing rod device 4 '; when the motor 5 ' is electrified, the motor shaft 5a ' drives the input shaft, the output shaft and the threaded rotating shaft of the speed reducing mechanism 6 ' to rotate in the positive direction; the outer end of the input shaft 6a 'of the speed reducing mechanism is provided with a normally open clutch 2 a' which is used for locking the input shaft of the speed reducing mechanism in a non-rotatable state when the brake mechanism is in an open state and is powered on and closed so as to maintain the brake mechanism in the open state;

the push rod device 4 'comprises a shell 4 e', the inner end of the shell 4e 'is connected with the inner side wall of the box body of the speed reducing mechanism 6', the thread section 4b 'of the thread rotating shaft 4 a' is located in an inner cavity of the shell 4e ', the thread section 4 b' is provided with a nut 4c ', the nut 4 c' and the thread section 4b 'are thread transmission pairs, the middle part of the nut 4 c' is provided with a flange plate 4d ', the outer end of the flange plate 4 d' is a push rod 8 ', the outer section of the push rod 8' extends out of the end wall of the shell 4e ', a brake spring part 7' is arranged between the flange plate 4d 'and the inner side wall of a box body of the speed reducing mechanism 6', the tension of the brake spring part 7 'acts on the push rod 8' through the flange plate 4d ', the end part of the push rod 8' and the outer side wall of the box body of the speed reducing mechanism 6 'are provided with connecting lugs 8 a' located on the same axis.

The working process of the normally closed brake is as follows: when the motor is electrified and operated, the output shaft of the speed reducing mechanism drives the threaded rotating shaft 4a ' to rotate, the nut 4c ' displaces inwards along the threaded section 4b ', the brake spring part 7 ' is compressed, meanwhile, the nut 4c ' and the push rod 8 ' retract inwards, the connecting lugs 8a ' at two ends of the push rod device drive the driving ends 3c ' of the two brake arms 3 ' to swing inwards, the brake members 3b ' at the brake ends 3a ' of the two brake arms 3 ' are opened outwards until the brake state shown in figure 1 is released, the clutch 2a ' is electrified and closed, the input shaft of the speed reducing mechanism is locked in a non-rotatable state, the brake mechanism is maintained in an open state, and the motor is powered off and stops rotating; when braking is needed, the clutch 2a ' is powered off, the state of reset and opening is realized, the locking of the input shaft of the speed reducing mechanism is released, the motor shaft in the rotating shaft system, the input shaft and the output shaft of the speed reducing mechanism 6 ' and the threaded rotating shaft of the push rod device 4 ' are all in a rotatable state, in this state, under the tension action of the brake spring member 7 ', the threaded rotating shaft 4a ', the gear shaft and the motor shaft of the speed reducing mechanism are reversed, the nut 4c ' is displaced towards the outer end along the threaded section 4b ', the push rod 8 ' extends outwards along with the threaded section, the push rod device 4 ' respectively pushes the driving ends 3c ' of the two braking arms 3 ' to swing outwards through the connecting lugs 8a ' at the two ends, and the braking members 3b ' of the braking ends 3a ' of the two braking arms 3 ' are folded inwards until the braking state shown in fig.

The normally closed brake has the following defects:

1) in the braking process, the friction plate and the braking surface of the braked member are frequently engaged and braked to be worn, so that the gap between the friction plate and the braking surface of the braked member is increased or overlarge, the stretching stroke of the brake spring part 7 'is increased, the stretching force of the brake spring part 7' is reduced, the braking effect is influenced, the braking reliability and the working stability are reduced, especially when the brake spring part with high rigidity is used, the braking acting force is rapidly reduced due to slight abrasion of the friction plate, the braking effect is seriously influenced, and even potential safety hazards are brought. In order to solve the problem that the friction plate is worn to cause the gap between the friction plate and the braking surface of the braked member to be enlarged or overlarge, the common method is to adjust the gap in time or replace the new friction plate, and frequently adjust the gap, so that the maintenance workload of the brake is large.

2) In the process of realizing braking, due to the tension action of the brake spring part 7 ', namely the push nut 4 c' is pushed to rapidly displace towards the outer end along the threaded section 4b ', the push rod device 4' pushes the driving ends 3c 'of the two brake arms 3' to rapidly swing towards the outer side through the connecting lugs 8a 'at the two ends of the push rod device, the brake members 3 b' at the braking ends of the two brake arms 3 'are rapidly folded towards the inner side, the friction plates 3 d' on the brake block are rapidly engaged with the braked member, and the kinetic energy formed by the rotation of the rotating member causes impact on the braked member, so that the brake and equipment vibrate, the stability of the braking process is influenced, and even the members are damaged.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide a normally closed brake with superimposed braking, which realizes superimposed braking by arranging a double-stage braking power source component, can improve the reliability of braking effect and the stability of operation process, and can effectively reduce the maintenance workload of the brake.

The technical scheme of the invention is as follows:

for ease of reading and understanding, the present invention will be described with the aid of the accompanying drawings.

The scheme of the invention comprises a braking mechanism 1 and an electric pushing device 2; see fig. 2, 5-7, 13;

the brake mechanism 1 comprises symmetrically arranged brake arms 3, the two brake arms 3 are respectively connected with two fixed member hinge shafts on the base to form a fulcrum Z of the brake arms, the brake arms 3 can swing around the fulcrum Z, one end of each brake arm 3 is a brake end 3a, the other end of each brake arm 3 is a drive end 3c, the brake ends 3a of the two brake arms 3 are provided with brake members 3b with symmetrical structures, and brake friction plates 3d are arranged on the inner sides of brake blocks on the brake members 3 b;

the electric pushing device 2 comprises a push rod device 4, a motor 5 and a one-way control mechanism 9 for controlling the brake operation condition;

the one-way control mechanism 9 comprises a second shell 17 and a connecting shaft 9a positioned in the shell, and a normally closed one-way brake mechanism 10 and a normally open one-way brake mechanism 11 are arranged on the connecting shaft 9 a; the one-way brake mechanism is a brake mechanism with a brake function only in one motion direction, and the normally open one-way brake mechanism 11 has the following functions: when the power is switched on, the locking connecting shaft 9a, the threaded rotating shaft 4a and the motor shaft 5a cannot rotate reversely, so that the brake is effectively maintained to be in an opening state; the normally closed one-way brake mechanism 10 functions as: when the power is off, the locking connecting shaft 9a, the threaded rotating shaft 4a and the motor shaft 5a cannot rotate in the positive direction, so that the brake is effectively maintained in a braking state;

the rotating shaft in the transmission system of the electric pushing device 2 comprises a motor shaft 5a, a threaded rotating shaft 4a in the push rod device 4 and a connecting shaft 9a in the one-way control mechanism 9; when the motor 5 operates, the motor shaft 5a can drive the connecting shaft 9a and the threaded rotating shaft 4a to rotate in the forward direction (the specification refers to that the motor shaft 5a drives the connecting shaft 9a and the threaded rotating shaft 4a to rotate in the forward direction), and when the threaded rotating shaft 4a rotates in the reverse direction in the operating condition, the connecting shaft 9a and the motor shaft 5a rotate in the reverse direction;

the push rod device 4 is provided with a connecting plate 12 and a first shell 13, the inner end of the first shell 13 is connected with the connecting plate 12, one end of a threaded rotating shaft 4a is connected with the connecting plate 12 and is supported by the connecting plate 12, a threaded section 4b at the other end of the threaded rotating shaft 4a is positioned in the first shell 13, a nut 14 is arranged on the threaded section 4b, the threaded section 4b and the nut 14 form a threaded transmission pair, the threaded angle is larger than a self-locking angle, a flange 14a is arranged on the nut 14, when the threaded rotating shaft 4a rotates, the nut 14 can axially displace along the threaded section 4b, and the flange 14a on the nut 14 concomitantly displaces;

an extension type push rod 8 with an end wall 8b is arranged at the outer end of the first shell 13, a disc part 15 is arranged at the inner end of the extension type push rod 8, the disc part 15 is connected and fixed with the inner end of the extension type push rod 8, the disc part 15 is provided with an inner hole 15a, the wall surface of the extension type push rod 8 is matched with a hole in the wall 13a of the end part of the first shell 13, the outer end of the extension type push rod 8 extends out of the wall 13a of the end part of the first shell 13, a flange 14a on the nut 14 is positioned in the cavity of the extension type push rod 8, the diameter of the inner hole 15a on the disc part 15 is larger than the outer diameter of the nut 14, and under the action of external force;

a first brake spring member 7 is arranged in the first housing 13, the first brake spring member 7 is positioned between a disk 15 at the inner end of the sleeve type push rod 8 and a connecting plate 12, see fig. 2, 5 to 12, or the first brake spring member 7 is positioned between the disk 15 at the inner end of the sleeve type push rod 8 and an end wall 13a of the first housing 13, see fig. 13, and the tension of the first brake spring member 7 acts on the sleeve type push rod 8;

a second brake spring member 16 is arranged in the push rod device 4, the second brake spring member 16 is positioned between a flange 14a on the nut 14 and an end wall 8b of the sleeve type push rod 8, see fig. 2, 5 to 12, or the second brake spring member 16 is positioned between the flange 14a on the nut 14 and a disc part 15 at the inner end of the sleeve type push rod 8, see fig. 13, and the tension of the second brake spring member 16 acts on the sleeve type push rod 8; the first brake spring component 7 and the second brake spring component 16 constitute a force source component of the two-stage brake of the invention;

in the electric push rod device 2, the outer end of the sleeve type push rod 8 and the outer end of the other end member coaxial with the sleeve type push rod 8 are respectively provided with a connecting lug 8a positioned on the same axis, see fig. 2, 5 to 13; the connecting lug 8a is hinged with the driving end 3c of the brake arm 3 in the brake mechanism.

Further, the method comprises the following steps:

the connecting shaft 9a in the unidirectional control mechanism 9 may be an integral structure, see fig. 2, 5, and 6, or a split structure of a first segment 9a01 and a second segment 9a02, see fig. 7; the integral structure connecting shaft 9a or the first subsection 9a01 and the second subsection 9a02 are connected with the inner ends of the motor shaft 5a and the threaded rotating shaft 4a in a plurality of matching and mutually connecting modes;

when the connecting shaft 9a is of an integral structure, the connecting shaft 9a of the integral structure can be positioned between the motor shaft 5a and the threaded rotating shaft 4a or on the rear end of the motor shaft 5a, and when the connecting shaft 9a of the integral structure is positioned between the motor shaft 5a and the threaded rotating shaft 4a, referring to fig. 2 and 5, the front end of the motor shaft 5a is connected with one end of the connecting shaft 9a, and the other end of the connecting shaft 9a is connected with the inner end of the threaded rotating shaft 4 a; when the connecting shaft 9a of the integral structure is positioned at the rear end of the motor shaft 5a, referring to fig. 6, the rear end of the motor shaft 5a is connected with the inner end of the connecting shaft 9a, and the front end of the motor shaft 5a is connected with the inner end of the threaded rotating shaft 4 a; the normally closed type unidirectional braking mechanism 10 and the normally open type unidirectional braking mechanism 11 are both arranged on the connecting shaft 9a of the integral structure, and the positions of the normally closed type unidirectional braking mechanism and the normally open type unidirectional braking mechanism on the connecting shaft 9a can be interchanged.

When the connecting shaft 9a is a segmented structure of the first segmented body 9a01 and the second segmented body 9a02, the first segmented body 9a01 is located between the motor shaft 5a and the threaded rotating shaft 4a, and the second segmented body 9a02 is located at the rear end of the motor shaft 5a, see fig. 7; the first segment 9a01 located between the motor shaft 5a and the threaded rotating shaft 4a, one end of which is connected with the front end of the motor shaft 5a, the other end of which is connected with the inner end of the threaded rotating shaft 4a, the second segment 9a02 located at the rear end of the motor shaft 5a, the inner end of which is connected with the rear end of the motor shaft 5a, the positions of the first segment 9a01 and the second segment 9a02 can be interchanged; any one of the normally closed one-way brake mechanism 10 and the normally open one-way brake mechanism 11 can be arranged on the first sectional body 9a01, and the other one is arranged on the second sectional body 9a02, and the normally closed one-way brake mechanism 10 and the normally open one-way brake mechanism 11 which are respectively connected to the sectional body 9a01 and the sectional body 9a02 can be mutually shifted;

the second housing 17 in the unidirectional control mechanism 9 may be of a unitary structure corresponding to the unitary structure connecting shaft 9a, or may be of a split-housing structure of the first split housing 1701 and the second split housing 1702 corresponding to the first split body 9a01 and the second split body 9a02 of the connecting shaft 9 a.

The working process of the structural embodiment shown in FIG. 2 is as follows:

the first detent spring member 7 in figure 2 is located between a disc 15 at the inner end of telescopic push rod 8 and the connecting plate 12, and the second detent spring member 16 is located between a flange 14a on nut 14 and an end wall 8b of telescopic push rod 8.

1) And (3) releasing the brake:

in the braking state shown in fig. 2, in order to achieve the extended state of the first braking spring member 7 after the first-stage braking, the second braking spring member 16 is in the superimposed braking state of being further compressed and storing energy, the normally closed one-way braking mechanism 10 in this state is in the closed state and the locking connecting shaft 9a cannot rotate forward, so as to maintain the second braking spring member 16 in the stable and reliable superimposed braking state, the sleeve type push rod 8 is in the state of being extended outward, and a distance is maintained between the inner side surface of the flange 14a on the nut 14 and the inner side surface of the disk 15 at the inner end of the sleeve type push rod 8, and between the outer end of the threaded section 4b and the inner side surface of the end wall 8b of the sleeve type push rod 8, as shown in fig. 2.

When the braking needs to be released, the normally closed type one-way brake mechanism 10 is powered on, the forward locking state of the connecting shaft 9a is released, the normally open type one-way brake mechanism 11 is powered on and closed at the same time (the normally open type one-way brake mechanism 11 is powered on and closed and only has the one-way brake function of controlling the connecting shaft 9a not to be reversed, and the forward rotation of the connecting shaft 9a is not influenced), so that the connecting shaft 9a is in the state of being capable of rotating forward, in this state, the compressed second brake spring member 16 releases energy and the acting force of stretching in the state of the forward rotation of the threaded rotating shaft 4a, the flange 14a on the nut 14 drives the nut 14 to displace towards the inner end along the threaded section 4b, so that the threaded rotating shaft 4a generates the forward rotation, the motor 5 is powered on, the motor shaft 5a drives the connecting shaft 9a and the threaded rotating shaft 4a to rotate forward, namely, the second brake spring member 16 releases the energy and the acting force of, the two resultant forces enable the threaded rotating shaft 4a to rapidly rotate in the forward direction, so that the displacement of the nut 14 towards the inner end along the threaded section 4b is accelerated until the inner side surface of a flange plate 14a on the nut 14 is attached to and pressed against the inner side surface of a disk part 15 at the inner end of the sleeve type push rod 8, the extension stroke of the second brake spring component 16 is completed, the extension trend of the second brake spring component 16 acting on the sleeve type push rod 8 is eliminated, and the superposition braking is released; in the process of releasing the superposition braking, the second brake spring component 16 releases energy and is assisted by the stretching action of the motor shaft 5a to drive the threaded rotating shaft 4a to rotate in the positive direction, so that the braking releasing time is shortened, the motor is assisted by the starting of the motor, and the energy consumption of the motor can be reduced; with the motor shaft 5a continuing to drive the connecting shaft 9a and the threaded rotating shaft 4a to rotate in the forward direction, the nut 14 continuing to displace towards the inner end along the threaded section 4b, the flange 14a on the nut 14 driving the sleeve type push rod 8 to retract inwards, the connecting lugs 8a at the two ends of the electric pushing device 2 pulling the driving ends 3c of the two braking arms to swing inwards, the end points of the braking ends 3a of the two braking arms moving outwards along with the flange until the friction plate 3d and the braked member are separated to a certain gap, the first braking spring member 7 is compressed along with the flange, the primary braking is released, in this state, the motor 5 is powered off and stops running, the normally open type one-way braking mechanism 11 in the powered on and closed state locks the connecting shaft 9a to rotate in the reverse direction along with the flange, the threaded rotating shaft 4a and the motor shaft 5a cannot rotate in the reverse direction along with the flange, and the, therefore, the brake is effectively maintained in a stable opening state, and in this state, the inner side surface of the flange plate 14a on the nut 14 and the inner side surface of the plate 15 at the inner end of the sleeve type push rod 8 are in a joint and pressing state.

2) And (3) realizing a braking process:

when braking is needed, the normally open type one-way brake mechanism 11 is powered off and reset to be in a normally open state, namely, the locking of the connecting shaft 9a is released, so that the connecting shaft 9a is in a reversible state, and the normally closed type one-way brake mechanism 10 is in a power-off closed state without influencing the reversal of the connecting shaft 9a, in the state, the first brake spring component 7 in a compressed state stretches, and pushes the sleeve type push rod 8 to extend outwards by acting on the disk component 15 at the inner end of the sleeve type push rod 8, and when the sleeve type push rod 8 extends outwards, because the inner side surface of the flange 14a on the nut 14 and the inner side surface of the disk component 15 at the inner end of the sleeve type push rod 8 are in a joint and pressing state, the disk component 15 at the inner end of the sleeve type push rod 8 pushes the flange 14a of the nut 14 to displace outwards, the nut 14 displaces outwards along the thread section 4b, and drives the thread rotating shaft 4a, the connecting shaft 9a and the motor shaft 5a are in a reverse rotation state; under the action of the first brake spring member 7 continuing to stretch, as the sleeve type push rod 8 continues to extend outwards, the connecting lugs 8a at the two ends of the electric push rod device 2 respectively drive the driving ends 3c of the two brake arms to swing outwards, the brake members 3b at the brake ends of the two brake arms are quickly folded inwards along with the sleeve type push rod 8 until the friction plate 3d is quickly attached to and pressed against the brake surface of the braked member, the sleeve type push rod 8 stops extending outwards in the process that the friction plate 3d is quickly attached to and pressed against the brake surface of the braked member, due to the continuous stretching of the first brake spring member 7 and the action of kinetic energy formed by the rotating member in the rotating process, the threaded rotating shaft 4a continues to rotate reversely, and when the nut 14 continues to move outwards along the threaded section 4b, the flange 14a on the nut 14 is separated from the disk 15 at the inner end of the sleeve type push rod 8 along, the flange 14a starts to compress the second brake spring member 16, after the flange 14a is separated from the disk part 15 at the inner end of the sleeve type push rod 8, the acting force of the first brake spring member 7 continuing to stretch acts on the sleeve type push rod 8, and the driving end 3c of the brake arm is pushed by the connecting lug 8a to swing outwards, so that the friction plate 3d and the brake surface of the braked part are quickly attached and pressed to enter primary braking until primary braking is realized;

under the condition that the first brake spring member 7 realizes primary effective braking, or in the process that the first brake spring member 7 implements primary braking through the stretching action, when the brake clearance of the friction plate is enlarged due to abrasion, the first brake spring member 7 will continue to stretch for a certain stroke, although the brake effect is influenced to a certain degree by the continuous stretching stroke of the first brake spring member 7, the continuous stretching stroke of the first brake spring member 7 firstly enables the related rotating members to continue to form kinetic energy, and secondly compensates the enlarged brake clearance, so that the friction plate and the braked member are still kept in a fit and pressed state; in this state, because the rotating members such as the threaded rotating shaft 4a, the connecting shaft 9a and the motor shaft 5a are in the reverse rotation state, the threaded rotating shaft 4a is continuously reversed, the nut 14 continues to move outwards along the threaded section 4b, as the nut 14 continues to further displace outwards along the threaded section 4b, the second braking spring member 16 is further compressed, the distance between the flange 14a on the nut 14 and the disc 15 at the inner end of the sleeve type push rod 8 increases, until when the threaded rotating shaft 4a stops rotating in the reverse direction and the nut 14 stops displacing outwards, the inner side surface of the flange 14a on the nut 14 is separated from the disc 15 at the inner end of the sleeve type push rod 8 to the distance shown in fig. 2, the second braking spring member 16 is in the state of being further compressed and energy-storing, and when the threaded rotating shaft 4a stops rotating in the reverse direction, the normally closed one-way brake device 10 in the closed state locks the connecting shaft 9a to be incapable of forward rotation (the threaded rotating shaft 4a, the connecting shaft 9a and the motor shaft 5a cannot forward rotate therewith), so that the second brake spring member 16 is in a stable state of being further compressed and storing energy, under the state, the acting force of the expansion trend generated by the second brake spring member 16 which is further compressed and stored energy acts on the sleeve type push rod 8, the sleeve type push rod 8 continuously generates the trend of extending outwards, and the driving ends 3c of the two brake arms are further pushed to swing outwards, namely on the basis of primary braking, the brake members 3b of the brake ends 3a of the two brake arms obtain the brake power source again and are further folded inwards, so that the friction plates obtain the superposed brake acting force to realize superposed braking on the braked members, and the normally closed one-way brake device 10 in the closed state locks the connecting shaft 9a to be incapable of forward rotation, thereby effectively maintaining the brake in a stable state with reliable braking effect; the second brake spring component 16 in the state of being further compressed and accumulating energy realizes the superposition braking, and one is to further obtain the superposition braking in the state of realizing the first-stage effective braking by the first brake spring component 7, thereby improving the reliability of the braking effect; secondly, when the friction plate is abraded to cause the brake clearance to be enlarged, the friction plate and the braked component are in a joint and pressing state to obtain the superposed brake realized by the second brake spring component 16, and the enlarged brake clearance enables the continuous stretching stroke of the first brake spring component 7 to influence the brake effect to a certain extent, but the continuous stretching stroke of the first brake spring component 7 enables the related rotating component to continuously form kinetic energy, and the continuously formed kinetic energy can increase the further compression and energy storage effect of the second brake spring component 16, namely the superposed brake effect realized by the second brake spring component 16, so that the normally closed brake of the invention can still be in a stable and reliable brake state; compared with the prior art, the reliability of the braking effect is improved.

The invention has the technical effects that:

1. because the invention is provided with the first brake spring component 7 and the second brake spring component 16 at the same time, in the process of implementing braking, after the first brake spring component 7 is extended to realize primary braking, the second brake spring component 16 is further compressed and stored with energy due to the kinetic energy effect formed by the related rotating component in the process of implementing primary braking, the second brake spring component 16 which is further compressed and stored with energy realizes superposition braking under the action of extension trend generated by the second brake spring component 16, and the normally closed one-way brake device 10 in a closed state effectively maintains the brake in a stable state with reliable braking effect; the reliable braking effect of the brake is in a stable state, and compared with the prior art, the reliability of the braking effect is improved; moreover, the second brake spring member 16 is further compressed and charged during the implementation of the superposition braking, which is implemented by fully utilizing the kinetic energy effect formed by the reverse rotation of the related rotating member during the implementation of the primary braking, i.e. the second brake spring member 16 does not consume energy when the effect of realizing the superposition braking is satisfied.

2. In the process of implementing primary braking, when the friction plate is abraded to cause the brake clearance to be enlarged, the first brake spring member 7 continuously extends for a certain stroke, although the continuous extending stroke generated by the first brake spring member 7 can influence the braking effect to a certain degree, the first brake spring member 7 continuously extends for a certain stroke, so that the related rotating members continuously form kinetic energy, and meanwhile, the enlarged brake clearance is compensated, so that the friction plate and the braked member are still in a joint and compressed state to realize primary braking; after the primary braking is realized, the second braking spring component 16 is further compressed and stores energy due to the kinetic energy effect formed by the related rotating component in the primary braking, and the second braking spring component 16 which is further compressed and stores energy realizes the superposition braking due to the action of the stretching trend generated by the second braking spring component 16; moreover, although the extended braking clearance enables the continuous extension stroke of the first braking spring component 7 to influence the primary braking effect to a certain extent, the continuous extension stroke of the first braking spring component 7 enables the related rotating component to continuously form kinetic energy, and the continuously formed kinetic energy can increase the further compression and energy storage effects of the second braking spring component 16, namely increase the braking effect of the superposition braking realized by the second braking spring component 16, so that the normal close brake can still realize stable and reliable braking when the braking is implemented under the condition that the braking clearance is enlarged due to the abrasion of the friction plate; compared with the prior art, the reliability of the braking effect is improved, and the defect that the braking gap needs to be adjusted frequently in the prior art is overcome.

3. In the invention, under the braking state after the superposition braking is realized, when the friction plate is thinned due to abrasion and generates a relaxation trend with the braking surface of a braked member, because a certain distance is kept between the inner side surface of a flange plate 14a on a nut 14 and the inner side surface of a disc part 15 at the inner end of an extension type push rod 8 or between the outer side surface of the flange plate 14a on the nut 14 and the inner side surface of an end wall 8b of a sleeve type push rod 8 under the state, the first braking spring component 7 and the second braking spring component 16 under the braking state can rapidly generate the action of continuing the expansion trend, and the extension type push rod 8 is pushed to extend outwards or retract inwards by acting on the extension type push rod 8, so that certain clearance compensation can be carried out on the relaxation trend of the friction plate and the braking surface of the braked member, and the effective braking state that the friction plate 3d is jointed and pressed with the, the normally closed brake can still maintain an effective braking state when the friction plate is abraded in the braking state after the superposition braking is realized.

4. When the invention implements the first-stage braking, in the process that the friction plate 3d is rapidly attached to and pressed against the braking surface of the braked member and enters the first-stage braking, when the flange 14a is separated from the disk 15 at the inner end of the sleeve type push rod 8 or the flange 14a is separated from the end wall 8b of the sleeve type push rod 8, the extension acting force generated by the compression of the second braking spring member 16 acts on the flange 14a on the nut 14 and the disk 15 at the inner end of the sleeve type push rod 8 or the end wall 8b of the sleeve type push rod 8 which is still attached to the flange 14a, so that the extension acting force generated by the compression of the second braking spring member 16 has a buffer effect on the acting force of the continuous extension trend of the first braking spring member 7 acting on the disk 15, namely, the impact generated when the friction plate 3d is rapidly combined with and pressed against the braking surface of the braked member is buffered, the impact on the braked member can be reduced, the vibration generated by the brake and the braked equipment is reduced, and the damage to the components is avoided, so that the stability of the brake operation process is improved.

5. In the process of releasing the brake, after the normally closed one-way brake mechanism 10 is electrified to release the forward locking of the connecting shaft 9a, the second brake spring member 16 which is in a compressed state and stores energy starts to release energy and stretch to act on the flange 14a on the nut 14, so that the nut 14 starts to displace inwards or outwards along the threaded section 4b, thereby driving the threaded rotating shaft to rotate in the forward direction, after the motor 5 is electrified, the motor shaft 5a also drives the connecting shaft 9a and the threaded rotating shaft 4a to transmit in the forward direction, namely, in the process of releasing the superimposed brake, the second spring member 16 releases energy and stretches to assist the motor shaft 5a to drive the threaded rotating shaft 4a to rotate in the forward direction, the resultant force of the two can enable the threaded rotating shaft 4a to rotate in the forward direction rapidly, the nut 14 is accelerated to displace inwards or outwards along the threaded section 4b, and the time for releasing the brake and assisting the start of the motor are shortened, the energy consumption of the motor can be reduced.

Other technical effects will be further explained in the detailed description.

Drawings

Fig. 1 is a schematic structural diagram of a conventional normally closed brake;

fig. 2 is a schematic structural diagram of embodiment 1 of the present invention, and fig. 2 is determined as an abstract drawing;

FIG. 3 is a schematic sectional view taken along line A-A of the pusher assembly 4 of FIG. 2;

FIG. 4 is another embodiment of the cross-sectional structure of FIG. 3;

FIG. 5 is a schematic structural view of example 2;

FIG. 6 is a schematic structural view of embodiment 3;

FIG. 7 is a schematic structural view of example 4;

FIG. 8 is a schematic structural view of example 5;

FIG. 9 is a schematic structural view of example 6;

FIG. 10 is a schematic structural view of example 7;

FIG. 11 is a schematic structural view of example 8;

FIG. 12 is a schematic structural view of example 9;

FIG. 13 is a schematic structural view of example 10, showing a modified structure of the present invention;

fig. 14 shows the connection of the electric propulsion device 2 to the braking device 1 in another embodiment.

The cross-sectional schematic structure of the pusher device 4 in fig. 5 to 13 refers to the structure shown in fig. 3 and 4.

Detailed Description

Example 1, see fig. 2-4.

Comprises a braking mechanism 1 and an electric pushing device 2;

the brake mechanism 1 comprises symmetrically arranged brake arms 3, the two brake arms 3 are respectively connected with two fixed member hinge shafts on the base to form a fulcrum Z of the brake arms, the brake arms 3 can swing around the fulcrum Z, in the illustration of fig. 2, the fulcrum Z is positioned at a lower part in the middle of the brake arms, one end of each brake arm 3 is a brake end 3a, the other end of each brake arm 3 is a drive end 3c, the brake ends 3a of the two brake arms 3 are provided with brake members 3b with symmetrical structures, and the inner sides of brake blocks on the brake members 3b are provided with brake friction plates 3 d; the brake mechanism 1 is prior art and is not limited to the structure shown in fig. 2, and the connecting structure of the brake mechanism 1 and the electric push rod device 2 is not exclusive;

the rotating shaft in the transmission system of the electric pushing device 2 comprises a motor shaft 5a, a threaded rotating shaft 4a in the push rod device 4 and a connecting shaft 9a in the one-way control mechanism 9; the motor shaft 5a can drive the connecting shaft 9a and the threaded rotating shaft 4a to rotate in the forward direction, and when the threaded rotating shaft 4a rotates in the reverse direction, the connecting shaft 9a and the motor shaft 5a can rotate in the reverse direction;

in the embodiment 1 shown in fig. 2, the connecting shaft 9a is an integral structure and is located between the motor shaft 5a and the threaded rotating shaft 4a, the front end of the motor shaft 5a is connected with one end of the connecting shaft 9a, and the other end of the connecting shaft 9a is connected with the inner end of the threaded rotating shaft 4a, and both adopt a coupling connection structure; in the process of brake release, when the motor 5 runs, the motor shaft 5a can drive the connecting shaft 9a and the threaded rotating shaft 4a to rotate in the forward direction, and when the motor is powered off and stops running in the running working condition, and when the threaded rotating shaft 4a rotates in the reverse direction, the connecting shaft 9a and the motor shaft 5a rotate in the reverse direction;

in the embodiment 1 shown in fig. 2, the normally closed type unidirectional braking mechanism 10 and the normally open type unidirectional braking mechanism 11 are both arranged on the connecting shaft 9a of the integral structure, the positions of the two on the connecting shaft 9a can be interchanged, and the realization of the respective functions is not affected after the transposition of the two;

the push rod device 4 is provided with a connecting plate 12 and a first shell 13, the inner end of the first shell 13 is connected with the connecting plate 12, one end of a threaded rotating shaft 4a is connected with the connecting plate 12, the connecting part between the two is in contact fit with a bearing and forms a support for the threaded rotating shaft 4a, a threaded section 4b on the threaded rotating shaft 4a is positioned in an inner cavity of the first shell 13, a nut 14 is arranged on the threaded section 4b, the threaded section 4b and the nut 14 form a threaded transmission pair, the thread angle is larger than a self-locking angle, a flange 14a is arranged on the nut 14, when the threaded rotating shaft 4a rotates, the nut 14 can axially displace along the threaded section 4b, and the flange 14a on the;

an extension type push rod 8 with an end wall 8b is arranged at the outer end of the first shell 13, a disc part 15 is arranged at the inner end of the extension type push rod 8, the disc part 15 is connected and fixed with the inner end of the extension type push rod 8, an inner hole 15a is formed in the disc part 15, the wall surface of the extension type push rod 8 is matched with a hole in the end wall 13a of the first shell 13, the disc part and the hole are in contact fit through a bearing, the outer end of the extension type push rod 8 extends out of the end wall of the first shell 13, a flange 14a on the nut 14 is located in the tube cavity of the extension type push rod 8, the diameter of the inner hole 15a in the disc part 15 is larger than the outer diameter of the nut 14, and under the action of;

in the implementation, the flange 14a is preferably made into an integral structure with the nut 14, the outer wall surface of the nut 14 and the inner hole 15a of the plate 15 are provided with a first key slot matching structure 18 formed by a sliding key and a sliding slot, in fig. 2 and 3, the outer wall surface of the nut 14 is provided with a sliding key 14b, the inner hole 15a of the plate 15 is provided with a sliding slot 15b, the sliding key 14b is positioned in the sliding slot 15b to form the first key slot matching structure 18, in the implementation, the sliding key 14b can also be arranged on the inner hole 15a of the plate 15, and the sliding slot 15b is then arranged on the outer wall surface of the nut 14; under the action of external force, the sliding key 14b can generate displacement along the sliding groove 15b, and due to the guiding and limiting effect of the sliding groove 15b on the sliding key 14b, the nut 14 can only generate axial displacement along the threaded section 4 b;

in addition, a second key groove matching structure 19 composed of a groove and a key is arranged on the outer edge of the disc 15 at the inner end of the sleeve type push rod 8 and the inner wall surface of the first shell 13, in fig. 2 and 3, the groove 15c is arranged on the outer edge of the disc 15, the key 13b is arranged on the inner wall surface of the first shell 13, and the key 13b is positioned in the groove 15c to form the second key groove matching structure 19; in implementation, the key 13b may also be disposed on the outer edge of the disc 15, and the groove 15c is then disposed on the inner wall surface of the first housing 13, and under the action of an external force, the groove 15c may generate displacement along the key 13b, and the key 13b performs a guiding and limiting function on the groove 15c, so that the sleeve type push rod 8 can only generate axial displacement relative to the first housing 13;

a first brake spring component 7 is arranged in the first shell 13, the first brake spring component 7 is positioned between a disk part 15 at the inner end of the sleeve type push rod 8 and the connecting plate 12, or the first brake spring component 7 is positioned between the disk part 15 at the inner end of the sleeve type push rod 8 and the end wall 13a of the first shell 13, and the tension of the first brake spring component 7 acts on the sleeve type push rod 8; as shown in embodiment 1 of fig. 2, the first brake spring member 7 is located between a disc 15 at the inner end of the telescopic push rod 8 and the connecting plate 12, and the tension of the first brake spring member 7 is applied to the telescopic push rod 8 through the disc 15 integrally connected to the telescopic push rod 8; in implementation, the first braking spring members 7 may be a plurality of structures which are uniformly distributed along the circumference, and the number of the first braking spring members 7 which are uniformly distributed along the circumference in fig. 3 is 6; the first braking spring member 7 can also be a single ring-type spring part as shown in fig. 4, or a ring-type structure formed by a plurality of butterfly springs;

a second brake spring member 16 is arranged in the push rod device 4, the second brake spring member 16 is positioned between a flange 14a on the nut 14 and an end wall 8b of the sleeve type push rod 8, or the second brake spring member 16 is positioned between the flange 14a on the nut 14 and a disc part 15 at the inner end of the sleeve type push rod 8, and the tension of the second brake spring member 16 acts on the sleeve type push rod 8; as shown in embodiment 1 of fig. 2, the second braking spring member 16 is located between the flange 14a of the nut 14 and the end wall 8b of the telescopic push rod 8, and the tension of the second braking spring member 16 acts on the telescopic push rod 8 through the end wall 8b of the telescopic push rod 8; in implementation, the second braking spring member 16 located in the inner cavity of the sleeve type push rod 8 may be a structure form in which a plurality of second braking spring members 16 are uniformly distributed along the circumference, similar to that shown in fig. 3, or a structure form in which a single ring type spring is similar to that shown in fig. 4, etc.;

the first brake spring component 7 and the second brake spring component 16 are force source components of the two-stage brake of the invention;

a second shell 17 in the one-way control mechanism 9 is of an integral structure, and corresponds to a connecting shaft 9a of the integral structure, one end of the second shell 17 is connected with the front end of the shell of the motor 5, and the other end of the second shell 17 is connected with the connecting plate 12; the connecting shaft 9a, and the normally closed type one-way brake mechanism 10 and the normally open type one-way brake mechanism 11 which are arranged on the connecting shaft are positioned in the second shell 17; in a specific implementation, a wall plate 17b may be disposed in the second housing 17 for auxiliary support of the connecting shaft 9 a;

in the electric push rod device 2, the outer end of a sleeve type push rod 8 and the outer end of a member at the other end coaxial with the sleeve type push rod 8 are respectively provided with a connecting lug 8a positioned on the same axis, and the connecting lug 8a is used for being hinged with the driving end 3c of a brake arm 3 in the brake mechanism; in the embodiment 1 shown in fig. 2, the component at the other end coaxial with the sleeve type push rod 8 is the motor 5, that is, the outer end of the sleeve type push rod 8 and the rear end (that is, the outer end) of the casing of the motor 5 at the other end coaxial with the sleeve type push rod 8 are respectively provided with the connecting lugs 8a located on the same axis, and the two connecting lugs 8a are respectively hinged to the driving ends 3c of the two brake arms in the brake mechanism 1;

the normally closed type unidirectional braking mechanism 10 and the normally open type unidirectional braking mechanism 11 are commercially available existing products of electromagnetic type structures. In this embodiment, the normally closed type unidirectional braking mechanism 10 and the normally open type unidirectional braking mechanism 11 are both fixed on a plate 17a in the second housing 17, and a positioning screw 10a of the normally closed type unidirectional braking mechanism 10 is connected with the plate 17 a; a shaft sleeve matched with a sliding key is arranged in a central hole of a brake disc of the normally closed type unidirectional brake mechanism 10, a unidirectional bearing is arranged in the central hole of the shaft sleeve, the shaft sleeve is supported and fixed on a connecting shaft 9a through the unidirectional bearing, the brake disc can axially move along the shaft sleeve through the matching of the sliding key of the shaft sleeve, and the connecting shaft 9a can only reversely rotate relative to the brake disc; when the normally closed type unidirectional braking mechanism 10 is closed, the brake disc moves axially and is pressed tightly, the brake disc cannot rotate, the connecting shaft 9a cannot rotate forwards and only rotates backwards under the action of the unidirectional bearing, and when the normally closed type unidirectional braking mechanism 10 is opened, the brake disc moves axially and resets and can rotate freely, and the connecting shaft 9a can rotate freely; the normally open type unidirectional brake mechanism 11 is also provided with a brake disc, a shaft sleeve matched with a sliding key is arranged in a central hole of the brake disc, a unidirectional bearing is arranged in the central hole of the shaft sleeve, the shaft sleeve is supported and fixed on the connecting shaft 9a through the unidirectional bearing, the brake disc can move axially along the shaft sleeve through being matched with the sliding key of the shaft sleeve, the connecting shaft 9a can only rotate forwardly relative to the brake disc, when the normally open type unidirectional brake mechanism 11 is closed, the axial movement of the brake disc is pressed, the brake disc cannot rotate, due to the action of the unidirectional bearing, the connecting shaft 9a can only transmit forwards and can not rotate reversely, when the normally open type unidirectional brake mechanism 11 is opened, the axial movement of the brake disc can. It should be noted that, according to the arrangement position change of the normally closed type one-way brake mechanism 10 and the normally open type one-way brake mechanism 11, the connection and fixing manner is not exclusive, but the matching and connection relationship with the connection shaft 9a or the first segment 9a01 and the second segment 9a02 is the same, in embodiment 1, the normally closed type one-way brake mechanism 10 and the normally open type one-way brake mechanism 11 are fixed on the plate 17a in the second housing 17, and in a specific implementation, can also be fixed on other components in the electric push rod device.

Example 2, see figure 5.

The structure of example 2 was modified to the structure shown in fig. 2. In the push rod device 4 of this embodiment, as described in embodiment 1, the connecting shaft 9a is also an integral structure and is located between the motor rotating shaft 5a and the threaded rotating shaft 4a, one end of the connecting shaft 9a is connected with the motor shaft 5a, the other end of the connecting shaft 9a is connected with the inner end of the threaded rotating shaft 4a, and one end of the connecting shaft 9a and the front end of the motor shaft 5a are in a coupling connection structure; this example differs from example 1 shown in fig. 2 in that: as shown in fig. 5, the other end of the connecting shaft 9a and the inner end of the threaded rotating shaft 4a are integrally formed, that is, the connection between the other end of the connecting shaft 9a and the inner end of the threaded rotating shaft 4a is a connection structure that integrates the two, and in addition, when the connection between the other end of the connecting shaft 9a and the inner end of the threaded rotating shaft 4a is a connection structure that integrates the two, the wall plate 17b shown in fig. 2 may not be arranged in the second housing 17, see fig. 5 and fig. 2;

in a specific implementation, the connection relationship of the connection shaft 9a of the integral structure shown in fig. 5 may be changed as follows: one end of the connecting shaft 9a and the front end of the motor shaft 5a are arranged into an integral connecting structure, and the other end of the connecting shaft 9a is connected with the inner end of the threaded rotating shaft 4a through a coupling; the connecting shaft 9a can also be deformed into a structural form of two segments, wherein one end of one segment can be integrated with the front end of the motor shaft 5a, one end of the other segment can also be integrated with the inner end of the threaded rotating shaft 4a, the two segments are connected by a coupling, the normally closed type unidirectional brake mechanism 10 and the normally open type unidirectional brake mechanism 11 are respectively connected to the two segments, and the positions of the two segments can be changed.

Otherwise, the same procedure as in example 1 was repeated.

Example 3, see figure 6.

The implementation structure of the push rod device 4 in the embodiment 3 is the same as that in the embodiment 1, referring to the structure shown in fig. 6 and fig. 2 and the related description in the embodiment 1;

the one-way control mechanism 9 comprises a second shell 17 and a connecting shaft 9a positioned in the shell, and a normally closed one-way brake mechanism 10 and a normally open one-way brake mechanism 11 are arranged on the connecting shaft 9 a;

a connecting shaft 9a in the one-way control mechanism 9 is of an integral structure and is positioned at the rear end of a motor shaft 5a, the rear end of the motor shaft 5a is connected with the inner end of the connecting shaft 9a, and the front end of the motor shaft 5a is connected with the inner end of the threaded rotating shaft 4 a; in implementation, as shown in fig. 6, the front end of the motor shaft 5a is connected to the inner end of the threaded rotating shaft 4a by a coupling, the inner end of the connecting shaft 9a is integrated with the rear end of the motor shaft 5a, which may also be referred to as "the extending section of the rear end of the motor shaft 5a is identical to the connecting shaft 9 a", that is, the rear end of the motor shaft 5a is integrated with the inner end of the connecting shaft 9 a; in implementation, the connection structure that the inner end of the connection shaft 9a and the rear end of the motor shaft 5a are integrated can also be transformed into coupling connection; in specific implementation, the front end of the shell of the motor 5 is connected with the connecting plate 12 through the auxiliary connecting piece 5b, so that the stability of the structure of the part is facilitated, and the protection effect is realized on the joint part of the front end of the motor shaft 5a and the inner end of the threaded rotating shaft 4 a;

in the process of implementing brake release, when the motor 5 runs, the motor shaft 5a can drive the connecting shaft 9a and the threaded rotating shaft 4a to rotate in the positive direction, and when the threaded rotating shaft 4a rotates in the reverse direction in the process of implementing brake, the motor shaft 5a and the connecting shaft 9a rotate in the reverse direction;

the normally closed type unidirectional braking mechanism 10 and the normally open type unidirectional braking mechanism 11 are both arranged on the connecting shaft 9a of the integral structure, and the positions of the normally closed type unidirectional braking mechanism and the normally open type unidirectional braking mechanism on the connecting shaft 9a can be interchanged;

the second shell 17 in the unidirectional control mechanism 9 is of an integral structure, corresponding to the connecting shaft 9a of the integral structure, the connecting shaft 9a, the normally closed unidirectional braking mechanism 10 and the normally open unidirectional braking mechanism 11 which are arranged on the connecting shaft are positioned in the second shell 17, and the inner end of the second shell 17 is connected with the rear end of the shell of the motor 5; a positioning screw 10a in the normally closed type one-way braking mechanism 10 is connected with the rear end of the motor 5 casing, and the connection and action effects of the normally closed type one-way braking mechanism 10, the normally open type one-way braking mechanism 11 and the connecting shaft 9a are the same as those of embodiment 1;

in the electric push rod device 2, the outer end of the sleeve type push rod 8 and the outer end wall of the other end member coaxial with the sleeve type push rod 8 are respectively provided with a connecting lug 8a located on the same axis, in embodiment 3 of the structure shown in fig. 6, the other end member coaxial with the sleeve type push rod 8 is a second housing 17 in the one-way control mechanism 9, that is: the outer end of the sleeve type push rod 8 and the outer end wall of the second shell 17 at the other end coaxial with the sleeve type push rod 8 are respectively provided with the connecting lug 8a which is positioned on the same axis.

Example 4, see figure 7.

The implementation structure of the push rod device 4 in the embodiment 4 is the same as that in the embodiment 1, and refer to the structure shown in fig. 2 and the related description in the embodiment 1;

the connecting shaft 9a is a split structure of a first segment 9a01 and a second segment 9a02, the first segment 9a01 is located between the motor shaft 5a and the threaded rotating shaft 4a, and the second segment 9a02 is located at the rear end of the motor shaft 5 a; a first sectional body 9a01 positioned between the motor shaft 5a and the threaded rotating shaft 4a, one end of which is connected with the front end of the motor shaft 5a and the other end is connected with the inner end of the threaded rotating shaft 4 a; a second sectional body 9a02 provided on the rear end of the motor shaft 5a, the inner end of which is connected to the rear end of the motor shaft 5 a; during the process of brake release, when the motor 5 runs, the motor shaft 5a can drive the first segment 9a01, the second segment 9a02 and the threaded rotating shaft 4a to rotate in the forward direction, and during the process of brake release, when the threaded rotating shaft 4a rotates in the reverse direction, the first segment 9a01, the second segment 9a02 and the motor shaft 5a rotate in the reverse direction;

in fig. 7, one end of the first sectional body 9a01 is integrally arranged with the front end of the motor shaft 5a, i.e. the two are integrally arranged, and the other end of the first sectional body 9a01 is coupled with the inner end of the threaded rotating shaft 4 a; in the implementation, the following may be modified: one end of the first sectional body 9a01 is connected with the front end of the motor shaft 5a as a coupling, and the other end of the first sectional body 9a01 and the inner end of the threaded rotating shaft 4a are integrated; the inner end of the second segment 9a02 is integrated with the rear end of the motor shaft 5a, in the implementation, the inner end of the second segment 9a02 can be connected with the rear end of the motor shaft 5a by a coupling; the arrangement positions of the first segment body 9a01 and the second segment body 9a02 can be interchanged;

any one of the normally closed one-way brake mechanism 10 and the normally open one-way brake mechanism 11 can be arranged on the sectional body 9a01, and the other one of the normally closed one-way brake mechanism 10 and the normally open one-way brake mechanism 11 can be arranged on the sectional body 9a02, and the normally closed one-way brake mechanism 10 and the normally open one-way brake mechanism 11 which are respectively connected to the first sectional body 9a01 and the second sectional body 9a02 can be mutually shifted;

the second casing 17 is a sub-casing structure of a first sub-casing 1701 and a second sub-casing 1702, and corresponds to a first segment 9a01 and a second segment 9a02 of a connecting shaft 9a, one end of the first sub-casing 1701 is connected with the front end of the casing of the motor 5, the other end of the first sub-casing 1701 is connected with the connecting plate 12, the inner end of the second sub-casing 1702 is connected with the rear end of the casing of the motor 5, and the arrangement positions of the first sub-casing 1701 and the second sub-casing 1702 can be changed; the first segment body 9a01 and the normally closed one-way brake mechanism 10 connected to the segment body are positioned in the first sub-shell body 1701, and the second segment body 9a02 and the normally open one-way brake mechanism 11 connected to the segment body are positioned in the second sub-shell body 1702;

in fig. 7, a set screw 10a in the normally closed one-way brake mechanism 10 is connected with the front end of the casing of the motor 5; the connection and action effects of the normally closed type one-way brake mechanism 10 and the normally open type one-way brake mechanism 11 with the first sectional body 9a01 and the second sectional body 9a02 are the same as those of embodiment 1;

in the electric push rod device 2, the outer end wall of the sleeve type push rod 8 and the outer end wall of the other end member coaxial with the sleeve type push rod 8 are respectively provided with a connecting lug 8a located on the same axis, and in fig. 7, the other end member coaxial with the sleeve type push rod 8 is a second sub-housing 1702 in the second housing 17, that is: the outer end of the sleeve type push rod 8 and the outer end wall of the second sub-shell 1702 at the other end coaxial with the sleeve type push rod 8 are respectively provided with the connecting lug 8a which is positioned on the same axis.

Example 5, see figure 8.

Embodiment 5 of the structure shown in fig. 8 comprises a braking mechanism 1 and an electric pushing device 2;

the structure of the brake mechanism 1 is the same as that of embodiment 1;

in the embodiment shown in fig. 8, a speed reducing mechanism 6 is provided in the electric pushing device 2, that is, the speed reducing mechanism 6 is additionally provided on the basis of the "push rod device 4, the motor 5, and the one-way control mechanism 9 for controlling the braking operation condition" in the foregoing embodiment, the speed reducing mechanism 6 is a prior art structure, and the speed reducing mechanism 6 has an input shaft 6a and an output shaft 6 b;

the rotating shafts in the transmission system of the electric pushing device 2 shown in fig. 8 comprise the motor shaft 5a, the threaded rotating shaft 4a in the push rod device 4, the connecting shaft 9a in the one-way control mechanism 9, and the input shaft 6a and the output shaft 6b of the speed reducing mechanism 6; when the motor 5 runs, the motor shaft 5a can drive the connecting shaft 9a, the input shaft 6a and the output shaft 6b of the speed reducing mechanism 6 and the threaded rotating shaft 4a to rotate in the forward direction, and when the threaded rotating shaft 4a rotates in the reverse direction in the running working condition, the output shaft 6b and the input shaft 6a of the speed reducing mechanism 6 and the connecting shaft 9a and the motor shaft 5a rotate in the reverse direction;

the implementation structure of the push rod device 4 shown in fig. 8 is the same as that of the embodiment 1, and refer to fig. 8 and the structure shown in fig. 2 and the related description of the embodiment 1;

the one-way control mechanism 9 comprises a second shell 17 and a connecting shaft 9a positioned in the shell, and a normally closed one-way brake mechanism 10 and a normally open one-way brake mechanism 11 are arranged on the connecting shaft 9 a; the normally open type one-way brake mechanism 11 has the functions of: the connection shaft 9a, the threaded rotating shaft 4a, the input shaft 6a, the output shaft 6b and the motor shaft 5a are locked by closing the power on, so that the brake can not rotate reversely, and the brake is effectively maintained to be in an open state; the normally closed one-way brake mechanism 10 functions as: when the power is off, the locking connecting shaft 9a, the threaded rotating shaft 4a, the input shaft 6a, the output shaft 6b and the motor shaft 5a cannot rotate in the positive direction, and the brake is effectively maintained in a braking state;

the connecting shaft 9a in the unidirectional control mechanism 9 can be an integral structure, and also can be a split structure of a first segment 9a01 and a second segment 9a 02; the integral structure connecting shaft 9a or the first subsection 9a01 and the second subsection 9a02 are mutually connected with the motor shaft 5a, the inner end of the threaded rotating shaft 4a, the input shaft 6a and the output shaft 6b of the speed reducing mechanism in a plurality of matching ways;

the second housing 17 in the unidirectional control mechanism 9 may be a unitary structure corresponding to the unitary structure connecting shaft 9a, and the second housing 17 may also be a split-housing structure of the first split housing 1701 and the second split housing 1702 corresponding to the first split body 9a01 and the second split body 9a02 of the connecting shaft 9 a;

in the illustration of fig. 8, the connecting shaft 9a is an integral structure and is located between the motor shaft 5a and the input shaft 6a of the speed reducing mechanism, one end of the connecting shaft 9a is connected with the front end of the motor shaft 5a, the other end of the connecting shaft 9a is connected with the input shaft 6a of the speed reducing mechanism, and the output shaft 6b of the speed reducing mechanism is connected with the inner end of the threaded rotating shaft 4 a; in a specific implementation, the front end of the motor shaft 5a is connected with one end of the connecting shaft 9a by a coupling, the other end of the connecting shaft 9a is integrated with the input shaft 6a of the speed reducing mechanism, that is, the connection between the other end of the connecting shaft 9a and the input shaft 6a of the speed reducing mechanism is integrated into a connecting structure, in an implementation, one end of the connecting shaft 9a and the front end of the motor shaft 5a can be integrated, and the other end of the connecting shaft 9a and the input shaft 6a of the speed reducing mechanism are also integrated into a coupling connecting structure; the output shaft 6b of the speed reducing mechanism and the inner end of the threaded rotating shaft 4a are in a coupling connection structure; the motor shaft 5a can drive the connecting shaft 9a, the input shaft 6a and the output shaft 6b of the speed reducing mechanism and the threaded rotating shaft 4a to rotate in the forward direction, and when the threaded rotating shaft 4a rotates in the reverse direction, the output shaft 6b and the input shaft 6a of the speed reducing mechanism, the connecting shaft 9a and the motor shaft 5a rotate reversely;

the normally closed type unidirectional braking mechanism 10 and the normally open type unidirectional braking mechanism 11 are both arranged on the connecting shaft 9a of the integral structure, and the positions of the normally closed type unidirectional braking mechanism and the normally open type unidirectional braking mechanism on the connecting shaft 9a can be interchanged; a positioning screw 10a in the normally closed one-way braking mechanism 10 is connected with one side wall of the speed reducing mechanism; the normally closed type one-way brake mechanism 10 and the normally open type one-way brake mechanism 11 are the same as those of the existing product which is provided with the electromagnetic structure and can be purchased, and the connection and action effects with the connecting shaft 9a are the same as those of the product provided by the embodiment 1;

a second shell 17 in the one-way control mechanism 9 is of an integral structure, and corresponds to an integral connecting shaft 9a, one end of the second shell 17 is connected with the front end of the shell of the motor 5, and the other end of the second shell is connected with one side wall of the speed reducing mechanism 6; the connecting shaft 9a, and the normally closed type one-way brake mechanism 10 and the normally open type one-way brake mechanism 11 which are arranged on the connecting shaft are positioned in the second shell 17; in specific implementation, a transition connecting piece 6c can be arranged on the other side wall of the speed reducing mechanism 6 and connected with the connecting plate 12, the connection of the transition connecting piece 6c and the connecting plate 12 is beneficial to the integrity and stability of the appearance structure of the electric push rod device, and the shaft coupling structure between the output shaft 6b of the speed reducing mechanism and the inner end of the threaded rotating shaft 4a is protected;

in the electric push rod device 2, the outer end of a sleeve type push rod 8 and the outer end of a component at the other end, which is coaxial with the sleeve type push rod 8, are respectively provided with a connecting lug 8a which is positioned on the same axis; in fig. 8, the motor 5 is a component at the other end coaxial with the sleeve type push rod 8, that is, the outer end of the sleeve type push rod 8 and the wall of the rear end (that is, the outer end) of the casing of the motor 5 at the other end coaxial with the sleeve type push rod 8 are respectively provided with the connecting lug 8a located on the same axis.

Otherwise, the same procedure as in example 1 was repeated.

Example 6, see figure 9.

Embodiment 6 of the structure shown in fig. 9 is a modified structure of embodiment 5 shown in fig. 8.

The structure of embodiment 6 includes a brake mechanism 1 and an electric propulsion device 2; the electric pushing device 2 comprises the push rod device 4, a motor 5, a one-way control mechanism 9 for controlling the brake operation condition and a speed reducing mechanism 6;

the rotating shaft in the transmission system of the electric pushing device 2 comprises the motor shaft 5a, a threaded rotating shaft 4a in the push rod device 4, a connecting shaft 9a in the one-way control mechanism 9, an input shaft 6a and an output shaft 6b of the speed reducing mechanism 6; when the motor 5 runs, the motor shaft 5a can drive the input shaft 6a and the output shaft 6b of the speed reducing mechanism 6, the connecting shaft 9a and the threaded rotating shaft 4a to rotate in the forward direction, and when the threaded rotating shaft 4a rotates in the reverse direction in the running working condition, the connecting shaft 9a, the output shaft 6b of the speed reducing mechanism 6, the input shaft 6a and the motor shaft 5a rotate in the reverse direction;

the implementation structure of the push rod device 4 is the same as that of the embodiment 1, and refer to the structure shown in fig. 9 and fig. 2 and the related description of the embodiment 1;

in the embodiment 6 shown in fig. 9, the connecting shaft 9a is an integral structure and is located between the output shaft of the speed reducing mechanism and the threaded rotating shaft 4a, the front end of the motor shaft 5a is connected with the input shaft 6a of the speed reducing mechanism, the output shaft 6b of the speed reducing mechanism is connected with one end of the connecting shaft 9a, and the other end of the connecting shaft 9a is connected with the inner end of the threaded rotating shaft 4 a; in this example, the connection between the front end of the motor shaft 5a and the input shaft 6a of the speed reducing mechanism, the connection between the output shaft 6b of the speed reducing mechanism and one end of the connecting shaft 9a, and the connection between the other end of the connecting shaft 9a and the inner end of the threaded rotating shaft 4a are all coupling connection structures; in implementation, one end of the connecting shaft 9a may be integrated with the output shaft 6b of the speed reducing mechanism, and the other end of the connecting shaft 9a may be a coupling connection structure with the inner end of the threaded rotating shaft 4a, or one end of the connecting shaft 9a and the output shaft 6b of the speed reducing mechanism are a coupling connection structure as shown in the figure, and the other end of the connecting shaft 9a and the inner end of the threaded rotating shaft 4a are integrated; the motor shaft 5a can drive the input shaft 6a and the output shaft 6b of the speed reducing mechanism, the connecting shaft 9a and the threaded rotating shaft 4a to rotate in the forward direction, and when the threaded rotating shaft 4a rotates in the reverse direction, the connecting shaft 9a, the output shaft 6b of the speed reducing mechanism, the input shaft 6a and the motor shaft 5a rotate in the reverse direction;

the normally closed type one-way brake mechanism 10 and the normally open type one-way brake mechanism 11 are arranged on the integral connecting shaft 9a, the connecting and acting effects with the connecting shaft 9a are the same as those described in embodiment 1, and the positions of the two on the connecting shaft 9a can be interchanged;

the second shell 17 is of an integral structure, and corresponds to the connecting shaft 9a of the integral structure, one end of the second shell 17 is connected with one side wall of the speed reducing mechanism 6, and the other end of the second shell 17 is connected with the connecting plate 12; the integral connecting shaft 9a, the normally closed one-way brake mechanism 10 and the normally open one-way brake mechanism 11 which are connected to the shaft are positioned in the integral second shell 17; in a specific implementation, a wall plate 17b may be disposed in the second housing 17 for auxiliary support of the connecting shaft 9 a; a positioning screw 10a in the normally closed one-way brake mechanism 10 is connected with a plate 17 a;

in the electric push rod device 2, the outer end of a sleeve type push rod 8 and the outer end of a member at the other end coaxial with the sleeve type push rod 8 are respectively provided with a connecting lug 8a positioned on the same axis; in fig. 9, the components at the other end coaxial with the sleeve type push rod 8 are the motor 5, that is, the outer end of the sleeve type push rod 8 and the wall of the rear end (that is, the outer end) of the casing of the motor 5 at the other end coaxial with the sleeve type push rod 8 are respectively provided with the connecting lugs 8a located on the same axis;

the rest is similar to the embodiment 5, and the description related to fig. 9, fig. 8 and embodiment 5 is referred to.

Example 7, see figure 10.

Embodiment 7 of the structure shown in fig. 10 is another modified structure of embodiment 5 shown in fig. 8.

The structure of embodiment 7 includes a brake mechanism 1 and an electric propulsion device 2; the electric pushing device 2 comprises the push rod device 4, a motor 5, a one-way control mechanism 9 for controlling the brake operation condition and a speed reducing mechanism 6;

the rotating shaft in the transmission system of the electric pushing device 2 comprises the motor shaft 5a, a threaded rotating shaft 4a in the push rod device 4, a connecting shaft 9a in the one-way control mechanism 9, an input shaft 6a and an output shaft 6b of the speed reducing mechanism 6; when the motor 5 runs, the motor shaft 5a can drive the connecting shaft 9a, the input shaft 6a and the output shaft 6b of the speed reducing mechanism 6 and the threaded rotating shaft 4a to rotate in the forward direction, and when the threaded rotating shaft 4a rotates in the reverse direction in the running working condition, the output shaft 6b, the input shaft 6a, the motor shaft 5a and the connecting shaft 9a of the speed reducing mechanism 6 rotate in the reverse direction;

the implementation structure of the push rod device 4 is the same as that of the embodiment 1, and refer to fig. 10 and the structure shown in fig. 2 and the related description in the embodiment 1;

in the embodiment 7 shown in fig. 10, the connecting shaft 9a is of an integral structure and is located at the rear end of the motor shaft 5a, the inner end of the connecting shaft 9a is connected with the rear end of the motor shaft 5a, the front end of the motor shaft 5a is connected with the input shaft 6a of the speed reducing mechanism, and the output shaft 6b of the speed reducing mechanism is connected with the inner end of the threaded rotating shaft 4 a; in this example, the inner end of the connecting shaft 9a is integrated with the rear end of the motor shaft 5a, or "the extending section of the rear end of the motor shaft 5a is identical to the connecting shaft 9 a", that is, the inner end of the connecting shaft 9a is integrated with the rear end of the motor shaft 5a, the front end of the motor shaft 5a is connected with the input shaft 6a of the speed reducing mechanism, and the output shaft 6b of the speed reducing mechanism is connected with the inner end of the threaded rotating shaft 4a, and both are coupling connection structures; in implementation, the inner end of the connecting shaft 9a and the rear end of the motor shaft 5a can also be in a coupling connection structure; in specific implementation, the front end of the casing of the motor 5 is connected with the side wall of the speed reducing mechanism through the auxiliary connecting piece 5b, so that the stability of the structure of the part is facilitated, and the protection effect is realized on the coupling connection part of the front end of the motor shaft 5a and the input shaft 6a of the speed reducing mechanism.

When the motor 5 runs, the motor shaft 5a can drive the connecting shaft 9a, the input shaft 6a and the output shaft 6b of the speed reducing mechanism 6 and the threaded rotating shaft 4a to rotate in the forward direction, and when the threaded rotating shaft 4a rotates in the reverse direction in the running working condition, the output shaft 6b, the input shaft 6a, the motor shaft 5a and the connecting shaft 9a of the speed reducing mechanism 6 rotate in the reverse direction;

the normally closed type unidirectional braking mechanism 10 and the normally open type unidirectional braking mechanism 11 are both arranged on the connecting shaft 9a of the integral structure, and the positions of the normally closed type unidirectional braking mechanism and the normally open type unidirectional braking mechanism on the connecting shaft 9a can be interchanged; the connection and action effects of the normally closed type one-way brake mechanism 10 and the normally open type one-way brake mechanism 11 with the connecting shaft 9a are the same as those described in embodiment 1;

the second shell 17 is of an integral structure, and the inner end of the second shell 17 is connected with the rear end of the shell of the motor 5 corresponding to the connecting shaft 9a of the integral structure; the connecting shaft 9a, and the normally closed unidirectional brake mechanism 10 and the normally open unidirectional brake mechanism 11 connected to the connecting shaft are positioned in the second shell 17;

in the electric push rod device 2, the outer end of a sleeve type push rod 8 and the outer end of a member at the other end coaxial with the sleeve type push rod 8 are respectively provided with a connecting lug 8a positioned on the same axis; in fig. 10, the second housing 17 is a member of the other end coaxial with the sleeve type push rod 8, that is, the outer end of the sleeve type push rod 8 and the outer end wall of the second housing 17 of the other end coaxial with the sleeve type push rod 8 are respectively provided with the connecting lugs 8a on the same axis;

in specific implementation, a transition connecting piece 6c can be arranged on one side wall of the speed reducing mechanism and connected with the connecting plate 12, the connection of the transition connecting piece 6c and the connecting plate 12 is beneficial to the integrity and stability of the appearance structure of the electric push rod device, and the shaft coupling structure between the output shaft 6b of the speed reducing mechanism and the inner end of the threaded rotating shaft 4a is protected.

The rest is the same as that in embodiment 5, and refer to fig. 8 and fig. 10 and the related description in embodiment 5.

Example 8, see figure 11.

Embodiment 8 of the structure shown in fig. 11 is still another modified structure of embodiment 5 shown in fig. 8.

The structure of embodiment 8 includes a brake mechanism 1 and an electric propulsion device 2; the electric pushing device 2 comprises the push rod device 4, a motor 5, a one-way control mechanism 9 for controlling the brake operation condition and a speed reducing mechanism 6;

the rotating shaft in the transmission system of the electric pushing device 2 comprises the motor shaft 5a, a threaded rotating shaft 4a in the push rod device 4, a connecting shaft 9a in the one-way control mechanism 9, an input shaft 6a and an output shaft 6b of the speed reducing mechanism 6; when the motor 5 runs, the motor shaft 5a can drive the connecting shaft 9a, the input shaft 6a and the output shaft 6b of the speed reducing mechanism 6 and the threaded rotating shaft 4a to rotate in the forward direction, and when the threaded rotating shaft 4a rotates in the reverse direction in the running working condition, the output shaft 6b and the input shaft 6a of the speed reducing mechanism 6, the connecting shaft 9a and the motor shaft 5a rotate in the reverse direction;

the electric pushing device 2 in the foregoing embodiment has a shape like a Chinese character 'yi', and the electric pushing device 2 shown in fig. 11 has a shape similar to an 'L' or called an 'L' shape;

in fig. 11, the connecting shaft 9a is a segmented structure of a first segmented body 9a01 and a second segmented body 9a02, the first segmented body 9a01 is located between the output shaft 6b of the speed reducing mechanism and the threaded rotating shaft 4a, the second segmented body 9a02 is located at the outer end of the input shaft 6a of the speed reducing mechanism, one end of the first segmented body 9a01 is connected with the inner end of the output shaft 6b of the speed reducing mechanism, the other end of the first segmented body 9a01 is connected with the inner end of the threaded rotating shaft 4a, and the inner end of the second segmented body 9a02 is connected with the outer end of the input shaft 6a of the speed reducing mechanism; the arrangement positions of the first segment body 9a01 and the second segment body 9a02 can be interchanged;

in the implementation structure shown in fig. 11, one end of the first segment 9a01 and the output shaft 6b of the speed reducing mechanism are a coupling connection structure, the other end of the first segment 9a01 and the inner end of the threaded rotating shaft 4a are integrally formed, that is, the other end of the first segment 9a01 and the inner end of the threaded rotating shaft 4a are integrally formed, the inner end of the second segment 9a02 and the outer end of the input shaft 6a of the speed reducing mechanism are integrally formed, and "the extension section of the outer end of the input shaft 6a of the speed reducing mechanism is equal to the extension section of the second segment 9a 02"; in implementation, the inner end of the second sectional body 9a02 and the outer end of the input shaft 6a of the speed reducing mechanism can also be a coupling connection structure; and the positions where the first segment 9a01 and the second segment 9a02 are provided may be interchanged. When the motor 5 operates, the motor shaft 5a can drive the input shaft 6a, the second sectional body 9a02, the output shaft 6b of the speed reducing mechanism, the first sectional body 9a01 and the threaded rotating shaft 4a to rotate in the forward direction, and when the threaded rotating shaft 4a rotates in the reverse direction in the operating condition, the first sectional body 9a01, the output shaft 6b of the speed reducing mechanism, the input shaft 6a, the second sectional body 9a02 and the motor shaft 5a rotate in the reverse direction;

either one of the normally closed type one-way brake mechanism 10 and the normally open type one-way brake mechanism 11 may be provided on the first sectional body 9a01, and the other one may be provided on the second sectional body 9a 02;

in fig. 11, the normally closed one-way brake mechanism 10 is connected to the first segment 9a01, the normally open one-way brake mechanism 11 is connected to the second segment 9a02, and the normally closed one-way brake mechanism 10 and the normally open one-way brake mechanism 11 connected to the segment 9a01 and the segment 9a02, respectively, may be interchanged; the connection and the action effects of the normally closed type one-way brake mechanism 10 and the normally open type one-way brake mechanism 11 with the first sectional body 9a01 and the second sectional body 9a02 are the same as the above.

The second casing 17 is a sub-casing structure of a first sub-casing 1701 and a second sub-casing 1702, and corresponds to a first segment 9a01 and a second segment 9a02 of the connecting shaft 9a, one end of the first sub-casing 1701 is connected with the inner side wall of the speed reducing mechanism 6, the other end of the first sub-casing 1701 is connected with the connecting plate 12, and the inner end of the second sub-casing 1702 is connected with the outer side wall of the speed reducing mechanism 6; the first segment body 9a01 and the normally closed one-way brake mechanism 10 connected to the segment body are positioned in the first sub-shell body 1701, and the second segment body 9a02 and the normally open one-way brake mechanism 11 connected to the segment body are positioned in the second sub-shell body 1702; in a specific implementation, the set screw 10a in the normally closed one-way brake mechanism 10 is connected to the plate 17a in the first sub-housing 1701;

in the electric push rod device 2, the outer end of a sleeve type push rod 8 and the outer end of a member at the other end coaxial with the sleeve type push rod 8 are respectively provided with a connecting lug 8a positioned on the same axis; in fig. 11, the other end of the extension-type push rod 8 is the speed reducing mechanism 6, that is, the outer end of the extension-type push rod 8 and the outer side wall of the speed reducing mechanism 6 at the other end of the extension-type push rod 8 are respectively provided with the connecting lugs 8a on the same axis;

in specific implementation, the wall of the inner end of the input shaft 6a of the speed reducing mechanism is provided with a connecting pipe fitting 6d, and the connecting pipe fitting is connected with the front end of the shell of the motor 5, and the connecting pipe fitting 6d is connected with the front end of the shell of the motor 5, so that the structural stability of the inner end of the input shaft 6a of the speed reducing mechanism and the coupling structure of the motor shaft 5a are facilitated, and the inner end of the input shaft 6a of the speed reducing mechanism and the coupling structure.

Others are shown in figure 11.

In the specific implementation, the second sectional body 9a02 provided at the outer end of the input shaft of the speed reduction mechanism shown in fig. 11 may be modified to be provided at the outer end of the output shaft 6b of the speed reduction mechanism, when the second sectional body 9a02 is provided at the outer end of the output shaft 6b of the speed reduction mechanism, the normally open one-way brake mechanism 11 is connected to the second sectional body 9a02 provided at the outer end of the output shaft 6b, and the inner end of the second casing 1702 is connected to the outer side wall of the output shaft 6b of the speed reduction mechanism.

The further description is as follows:

the reduction mechanism 6 shown in fig. 11 further includes an intermediate transmission shaft 6 e.

The manner in which the position of the integral connecting shaft 9a or the first and second segmented bodies 9a01, 9a02 relative to the intermediate transmission shaft 6e in the speed reducing mechanism 6 is deformable is not limited to the following:

when the connecting shaft 9a is of an integral structure, the integral connecting shaft 9a can be arranged on the inner end of the middle transmission shaft 6e or the outer end of the middle transmission shaft 6e, the normally closed type one-way brake mechanism 10 and the normally open type one-way brake mechanism 11 are both arranged on the integral connecting shaft 9a, and the second shell 17 is correspondingly connected with the side wall of the speed reducing mechanism 6;

when the connecting shaft 9a is a segmented structure of a first segmented body 9a01 and a second segmented body 9a02, the first segmented body 9a01 can be disposed on the outer end of the middle transmission shaft 6e, the second segmented body 9a02 is disposed on the inner end of the middle transmission shaft 6e, and the first segmented body 9a01 and the second segmented body 9a02 can be interchanged with each other; either one of the normally closed type one-way brake mechanism 10 and the normally open type one-way brake mechanism 11 may be provided on the first sectional body 9a01, and the other one may be provided on the second sectional body 9a 02; the first sub-housing 1701 and the second sub-housing 1702 of the second housing 17 are correspondingly arranged with the first segment 9a01 and the second segment 9a 02;

in addition, when the connecting shaft 9a is a segmented structure of a first segmented body 9a01 and a second segmented body 9a02, the first segmented body 9a01 may be disposed on the outer end or the inner end of the intermediate transmission shaft 6e, the second segmented body 9a02 may be disposed between the motor shaft 5a and the inner end of the speed reduction mechanism input shaft 6a or on the outer end of the speed reduction mechanism input shaft 6a, or the second segmented body 9a02 may be disposed between the speed reduction mechanism output shaft 6b and the threaded rotating shaft 4a, and the first segmented body 9a01 and the second segmented body 9a02 may be shifted with each other; either one of the normally closed type one-way brake mechanism 10 and the normally open type one-way brake mechanism 11 may be provided on the first sectional body 9a01, and the other one may be provided on the second sectional body 9a 02; the first sub-housing 1701 and the second sub-housing 1702 of the second housing 17 are correspondingly arranged with the first segment 9a01 and the second segment 9a 02;

the above deformation structures all satisfy the following requirements in the technical scheme of the invention: when the motor 5 operates, the motor shaft 5a can drive the input shaft 6a, the intermediate transmission shaft 6e and the output shaft 6b of the speed reducing mechanism, the connecting shaft 9a (or the first sectional body 9a01 and the second sectional body 9a02) and the threaded rotating shaft 4a to rotate in the forward direction, and when the threaded rotating shaft 4a rotates in the reverse direction in the operating condition, the connecting shaft 9a (or the first sectional body 9a01 and the second sectional body 9a02), the output shaft 6b of the speed reducing mechanism, the intermediate transmission shaft 6e, the input shaft 6a and the motor shaft 5a rotate in the reverse direction; the respective functional actions of the normally closed one-way brake mechanism 10 and the normally open one-way brake mechanism 11 provided on the monolithic structure or on the first segment 9a01 and the second segment 9a02, respectively, are not affected.

The above modified embodiments are all covered by the technical solution of the present invention.

Example 9, see figure 12.

Embodiment 9 of the structure shown in fig. 12 is a further modification of embodiment 5 shown in fig. 8.

The structure of embodiment 9 includes a brake mechanism 1 and an electric propulsion device 2; the electric pushing device 2 comprises the push rod device 4, a motor 5, a one-way control mechanism 9 for controlling the brake operation condition and a speed reducing mechanism 6;

the rotating shaft in the transmission system of the electric pushing device 2 comprises the motor shaft 5a, a threaded rotating shaft 4a in the push rod device 4, a connecting shaft 9a in the one-way control mechanism 9, an input shaft 6a and an output shaft 6b of the speed reducing mechanism 6; when the motor 5 runs, the motor shaft 5a can drive the connecting shaft 9a, the input shaft 6a and the output shaft 6b of the speed reducing mechanism 6 and the threaded rotating shaft 4a to rotate in the forward direction, and when the threaded rotating shaft 4a rotates in the reverse direction in the running working condition, the output shaft 6b and the input shaft 6a of the speed reducing mechanism 6, the connecting shaft 9a and the motor shaft 5a can rotate in the reverse direction;

the electric propulsion device 2 shown in fig. 12 is similar in appearance to the "L" shaped structure of embodiment 8;

in fig. 12, the connecting shaft 9a is a first segment 9a01 and a second segment 9a02, the first segment 9a01 is located between the motor shaft 5a and the inner end of the input shaft 6a of the speed reduction mechanism, the second segment 9a02 is located on the outer end of the input shaft 6a of the speed reduction mechanism, one end of the first segment 9a01 is connected to the inner end of the input shaft 6a of the speed reduction mechanism, the other end is connected to the front end of the motor shaft 5a, the inner end of the second segment 9a02 is connected to the outer end of the input shaft 6a of the speed reduction mechanism, and the inner end of the output shaft 6b of the speed reduction mechanism is connected to the inner end of the threaded rotating shaft 4 a; the arrangement positions of the first segment body 9a01 and the second segment body 9a02 can be interchanged;

in fig. 12, one end of the first segment 9a01 is integrally connected to the front end of the motor shaft 5a, the other end of the first segment 9a01 is integrally connected to the inner end of the input shaft 6a of the speed reduction mechanism, the inner end of the second segment 9a02 is integrally connected to the outer end of the input shaft 6a of the speed reduction mechanism, and the inner end of the output shaft 6b of the speed reduction mechanism is integrally connected to the inner end of the threaded rotating shaft 4a to form a coupling connection structure; in an implementation, one end of the first segment 9a01 and the front end of the motor shaft 5a may be a coupling connection structure, the other end of the first segment 9a01 and the inner end of the input shaft 6a of the speed reduction mechanism may be connected in an integrated manner, and the inner end of the second segment 9a02 and the outer end of the input shaft 6a of the speed reduction mechanism may be a coupling connection structure; and the setting positions of the first sectional body 9a01 and the second sectional body 9a02 can be interchanged as transposition; when the motor 5 operates, the motor shaft 5a can drive the first segment 9a01, the input shaft 6a, the second segment 9a02, the output shaft 6b and the threaded rotating shaft 4a of the speed reducing mechanism 6 to rotate in the forward direction, and when the threaded rotating shaft 4a rotates in the reverse direction in the operating condition, the output shaft 6b, the input shaft 6a, the first segment 9a01, the second segment 9a02 and the motor shaft 5a of the speed reducing mechanism 6 can rotate in the reverse direction;

any one of the normally closed one-way brake mechanism 10 and the normally open one-way brake mechanism 11 can be arranged on the first sectional body 9a01, and the other one is arranged on the second sectional body 9a02, and the normally closed one-way brake mechanism 10 and the normally open one-way brake mechanism 11 which are respectively connected to the sectional body 9a01 and the sectional body 9a02 can be mutually shifted;

in fig. 12, the normally closed one-way brake mechanism 10 is connected to the first segment 9a01, the normally open one-way brake mechanism 11 is connected to the second segment 9a02, and the normally closed one-way brake mechanism 10 and the normally open one-way brake mechanism 11 connected to the first segment 9a01 and the second segment 9a02, respectively, are capable of interchanging with each other; the connection and the action effects of the normally closed type one-way brake mechanism 10 and the normally open type one-way brake mechanism 11 with the first sectional body 9a01 and the second sectional body 9a02 are the same as the above.

The second casing 17 is a sub-casing structure of a first sub-casing 1701 and a second sub-casing 1702, and corresponds to the first sub-section 9a01 and the second sub-section 9a02 of the connecting shaft 9a, one end of the first sub-casing 1701 is connected with the inner side wall of the speed reducing mechanism 6, the other end of the first sub-casing 1701 is connected with the front end of the casing of the motor 5, and the inner end of the second sub-casing 1702 is connected with the outer side wall of the speed reducing mechanism 6; the first segment body 9a01 and the normally closed one-way brake mechanism 10 connected to the segment body are positioned in the first sub-shell body 1701, and the second segment body 9a02 and the normally open one-way brake mechanism 11 connected to the segment body are positioned in the second sub-shell body 1702; in operation, the set screw 10a of the normally closed one-way brake mechanism 10 is connected to the front end of the housing of the motor 5.

In the electric push rod device 2, the outer end of a sleeve type push rod 8 and the outer end of a member at the other end coaxial with the sleeve type push rod 8 are respectively provided with a connecting lug 8a positioned on the same axis; in fig. 12, the other end of the extension-type push rod 8 is the speed reducing mechanism 6, that is, the outer end of the extension-type push rod 8 and the outer side wall of the speed reducing mechanism 6 at the other end of the extension-type push rod 8 are respectively provided with the connecting lugs 8a located on the same axis.

In specific implementation, a transition connecting piece 6c can be arranged on the inner side wall of the output shaft 6b of the speed reducing mechanism and connected with the connecting plate 12, the transition connecting piece 6c is connected with the connecting plate 12, the stability of the structure of the part is facilitated, and a coupling structure between the output shaft 6b of the speed reducing mechanism and the inner end of the threaded rotating shaft 4a is protected.

Others are shown in figure 12.

Further, the method comprises the following steps:

in the configuration shown in fig. 12, the reduction mechanism 6 further includes an intermediate transmission shaft 6 e.

The position of the integral connecting shaft 9a or the first segment 9a01 and the second segment 9a02 with respect to the intermediate transmission shaft 6e in the speed reducing mechanism 6 is also modified in various ways, and the specific modified embodiment is similar to that described in example 8, and the modified embodiments are also within the scope of the present invention.

Example 10, see figure 13.

Fig. 13 shows a structure which is a modification of the structure shown in fig. 2.

In fig. 13, the structure of the embodiment 10 includes a brake mechanism 1 and an electric propulsion device 2;

the electric pushing device 2 comprises the push rod device 4, a motor 5 and a one-way control mechanism 9 for controlling the brake operation condition;

the structural elements of the brake mechanism 1 shown in fig. 13 and the operation principle and action thereof are the same as those of the brake mechanism 1 shown in fig. 2; the fulcrum Z of the two brake arms 3 in the brake mechanism 1 shown in fig. 2 is located at a position lower than the middle of the brake arm, the end point of the brake end 3a thereof is located at the lower end of the brake arm 3 shown in the figure, while the fulcrum Z of the brake mechanism 1 shown in fig. 13 is located at the lower end of the brake arm shown in the figure, the end point of the brake end 3a thereof is located at a position lower than the middle of the brake arm shown in the figure, both of which are conventional prior art structures;

the rotating shaft in the transmission system of the electric pushing device 2 comprises a motor shaft 5a, a threaded rotating shaft 4a in the push rod device 4 and a connecting shaft 9a in the one-way control mechanism 9; when the motor 5 operates, the motor shaft 5a can drive the connecting shaft 9a and the threaded rotating shaft 4a to rotate in the forward direction, and when the threaded rotating shaft 4a rotates in the reverse direction in the operating condition, the connecting shaft 9a and the motor shaft 5a can rotate in the reverse direction;

a normally closed one-way brake mechanism 10 and a normally open one-way brake mechanism 11 are arranged on the connecting shaft 9 a;

in the pusher device 4:

the first brake spring member 7 of embodiment 1 shown in fig. 2 is located between the disc 15 at the inner end of the telescopic push rod 8 and the connecting plate 12, while the first brake spring member 7 of embodiment 10 shown in fig. 13 is located between the disc 15 at the inner end of the telescopic push rod 8 and the end wall 13a of the first housing 13, and the tension of the first brake spring member 7 acts on the telescopic push rod 8, and the action effect of the two is the same;

the second braking spring member 16 of embodiment 1 shown in fig. 2 is located between the flange 14a of the nut 14 and the end wall 8b of the telescopic push rod 8, while the second braking spring member 16 of embodiment 10 shown in fig. 13 is located between the flange 14a of the nut 14 and the disc 15 at the inner end of the telescopic push rod 8, and the tension of the second braking spring member 16 acts on the telescopic push rod 8, and the action effect of the two is the same;

the other structure of the embodiment 10 shown in fig. 13 is the same as that of the embodiment 1 shown in fig. 2, and reference is made to fig. 13, fig. 2 and the description related to the embodiment 1.

The working process of the structural embodiment shown in FIG. 13 is as follows:

the first braking spring member 7 shown in fig. 13 is located between the disc 15 at the inner end of the sleeve type push rod 8 and the end wall 13a of the first housing 13, and the first braking spring member 7 shown in fig. 2 is located between the disc 15 at the inner end of the sleeve type push rod 8 and the connecting plate 12, both acting on the sleeve type push rod 8, and both the principle process and the effect are the same, and both the first braking spring member 7 and the second braking spring member realize primary braking through the extension and the action of the first braking spring member 7; the second braking spring member 16 shown in fig. 13 is located between the flange 14a on the nut 14 and the disk 15 at the inner end of the sleeve type push rod 8, and the second braking spring member 16 shown in fig. 2 is located between the flange 14a on the nut 14 and the end wall 8b of the sleeve type push rod 8, both acting on the sleeve type push rod 8, and the principle process and effect of the action are the same, and the superposition braking is realized through the state of being further compressed and storing energy after the primary braking is realized.

The principle structure and the action effect of the brake mechanism 1 shown in fig. 13 are the same as those of the brake mechanism 1 shown in fig. 2, and the difference between the two is that the respective supporting points Z are located at different positions; the fulcrum Z on the brake arm 3 shown in fig. 2 is located at the middle lower part, the end point of the brake end 3a is the lower end of the brake arm 3, and in the process of braking, the sleeve type push rod 8 extends outwards to drive the driving end 3c of the brake arm 3 to swing outwards; while the pivot Z on the brake arm 3 shown in fig. 13 is located at the lower end of the brake arm 3 shown in the figure, and the end point of the brake end 3a is located on the arm section at the middle lower part of the brake arm 3, during the braking process, the sleeve type push rod 8 is retracted inwards to drive the driving end 3c of the brake arm 3 to swing inwards. The operation of the embodiment of the structure shown in fig. 13 is briefly described as follows:

1) and (3) releasing the brake:

in the braking state shown in fig. 13, the first brake spring member 7 is in the extended state after the first-stage braking, the second brake spring member 16 is in the superimposed braking state in which the second brake spring member 16 is further compressed and energy is stored, the normally closed one-way brake mechanism 10 in this state is in the closed state and the locking connecting shaft 9a cannot rotate in the forward direction, the stable and reliable superimposed braking state of the second brake spring member 16 is maintained, the sleeve-type push rod 8 is in the retracted state in the inward direction, and a distance shown in fig. 13 is kept between the outer side surface of the flange 14a and the outer end of the threaded section 4b on the nut 14 and the inner side surface of the end wall 8b of the sleeve-type push rod 8.

When the braking needs to be released, the normally closed type one-way brake mechanism 10 is powered on, the forward locking state of the connecting shaft 9a is released, the normally open type one-way brake mechanism 11 is powered on and closed at the same time (the normally open type one-way brake mechanism 11 is powered on and closed and only has the one-way brake function of controlling the connecting shaft 9a not to be reversed, and the forward rotation of the connecting shaft 9a is not influenced), so that the connecting shaft 9a is in the state of being capable of rotating forward, in this state, the compressed second spring member 16 releases energy and the acting force of stretching in the state that the threaded rotating shaft 4a can rotate forward, the flange 14a on the nut 14 drives the nut 14 to displace towards the outer end along the threaded section 4b, so that the threaded rotating shaft 4a generates the forward rotation, the motor 5 is powered on, the motor shaft 5a drives the connecting shaft 9a and the threaded rotating shaft 4a to rotate forward, namely, the second brake spring member 16 releases energy and the acting force of stretching to, the two resultant forces enable the threaded rotating shaft 4a to rapidly rotate in the forward direction, so that the displacement of the nut 14 towards the outer end along the threaded section 4b is accelerated until the outer side surface of the flange plate 14a on the nut 14 is attached to and pressed against the inner side surface of the end wall 8b of the sleeve type push rod 8, so that the extension stroke of the second spring member 16 is completed, the extension trend of the second brake spring member 16 acting on the sleeve type push rod 8 is eliminated, and the superposition brake is released; in the process of releasing the superposition braking, the second spring component 16 releases energy and is assisted by the stretching action to drive the threaded rotating shaft 4a to rotate in the positive direction through the motor shaft 5a, so that the braking releasing time is shortened, the motor is assisted by the starting of the motor, and the energy consumption of the motor can be reduced; with the motor shaft 5a continuing to drive the connecting shaft 9a and the threaded rotating shaft 4a to rotate in the forward direction, the nut 14 continuing to displace towards the outer end along the threaded section 4b, the flange 14a on the nut 14 pushing the sleeve type push rod 8 to extend towards the outer end, the connecting lugs 8a at the two ends in the electric pushing device 2 pushing the driving ends 3c of the two braking arms to swing towards the outer side, the end points of the braking ends 3a of the two braking arms moving towards the outer side until the friction plate 3d and the braked member are separated to a certain gap, the first braking spring member 7 is compressed accordingly, the primary braking is released, in this state, the motor 5 is powered off and stops running, the normally open type one-way braking mechanism 11 in the powered on and closed state locks the connecting shaft 9a to rotate in the reverse direction accordingly, the threaded rotating shaft 4a and the motor shaft 5a cannot rotate in the reverse direction accordingly, and the first braking spring, therefore, the brake is effectively maintained in a stable opening state, and in this state, the outer side surface of the flange plate 14a on the nut 14 and the inner side surface of the end wall 8b of the sleeve type push rod 8 are in a joint and pressing state.

2) Carrying out a braking process

When braking is needed, the normally open type one-way brake mechanism 11 is powered off and reset to be in a normally open state, namely, the locking of the connecting shaft 9a is released, so that the connecting shaft 9a is in a reversible state, and the normally closed type one-way brake mechanism 10 is in a power-off closed state without influencing the reversal of the connecting shaft 9a, in this state, the first brake spring component 7 in a compressed state is stretched and pushed to retract inwards by acting on the disk component 15 at the inner end of the sleeve type push rod 8, the sleeve type push rod 8 is pushed to retract inwards, at the same time of pushing the sleeve type push rod 8 to retract inwards, because the outer side surface of the flange 14a on the nut 14 and the inner side surface of the end wall 8b of the sleeve type push rod 8 are in a joint and pressing state, the end wall 8b of the push rod 8 pushes the flange 14a on the nut 14 to displace inwards, the nut 14 displaces inwards along the thread section 4b along with the sleeve type push rod 8, the connecting shaft 9a and the motor shaft 5a are in a reverse rotation state; under the action of the first brake spring member 7 continuing to stretch, as the sleeve type push rod 8 continues to retract inwards, the connecting lugs 8a at the two ends of the electric push rod device 2 respectively drive the driving ends 3c of the two brake arms to swing inwards, the brake members 3b at the brake ends of the two brake arms are quickly folded inwards along with the sleeve type push rod 8 until the friction plate 3d is quickly attached to and pressed against the brake surface of the braked member, the sleeve type push rod 8 stops retracting inwards in the process that the friction plate 3d is quickly attached to and pressed against the brake surface of the braked member, due to the action of kinetic energy formed by the first brake spring member 7 continuing to stretch and the rotating member in the rotating process, the threaded rotating shaft 4a continues to rotate reversely, when the nut 14 continues to move inwards along the threaded section 4b, the flange 14a on the nut 14 is separated from the inner side surface of the end wall 8b of the sleeve type push rod 8, and the flange 14a starts to compress the, after the flange 14a is separated from the inner side surface of the end wall 8b of the sleeve type push rod 8, the acting force of the first brake spring component 7 continuing to stretch acts on the sleeve type push rod 8, and the driving end 3c of the brake arm is driven to swing inwards through the connecting lug 8a, so that the friction plate 3d and the brake surface of the braked member are quickly attached and pressed to enter primary braking until primary braking is realized;

under the condition that the first brake spring member 7 realizes primary effective braking, or in the process that the first brake spring member 7 implements primary braking through the stretching action, when the brake clearance is enlarged due to abrasion of the friction plate, the first brake spring member 7 will continue to stretch for a certain stroke, although the brake effect is influenced to a certain degree by the continuous stretching stroke generated by the first brake spring member 7, the continuous stretching stroke of the first brake spring member 7 firstly enables the related rotating member to continue to form kinetic energy, and secondly compensates the enlarged brake clearance, so that the friction plate and the braked member are still in a state of being attached and pressed; in this state, as the threaded rotating shaft 4a continues to rotate reversely by the kinetic energy generated by the rotating members such as the threaded rotating shaft 4a, the connecting shaft 9a and the motor shaft 5a in the reverse rotation state, the nut 14 continues to move inwardly along the threaded section 4b, and as the nut 14 continues to further move inwardly along the threaded section 4b, the second braking spring member 16 is further compressed, and the distance between the flange 14a of the nut 14 and the inner side surface of the end wall 8b of the sleeve type push rod 8 increases, until when the threaded rotating shaft 4a stops rotating reversely and the nut 14 stops moving inwardly, the outer side surface of the flange 14a of the nut 14 and the inner side surface of the end wall 8b of the sleeve type push rod 8 are separated to the distance shown in fig. 13, and the second braking spring member 16 is in a state of being further compressed and storing energy, and when the threaded rotating shaft 4a stops rotating reversely, the normally closed one-way brake device 10 in the closed state locks the connecting shaft 9a to be incapable of rotating in the forward direction (the threaded rotating shaft 4a, the connecting shaft 9a and the motor shaft 5a cannot rotate in the forward direction), so that the second brake spring member 16 is in a stable state of being further compressed and storing energy, in this state, the acting force of the expansion trend generated by the second brake spring member 16 which is further compressed and stored energy acts on the sleeve type push rod 8, so that the sleeve type push rod 8 continuously generates the inward retraction trend, and the driving ends 3c of the two brake arms are further driven to swing inwards, that is, on the basis of primary braking, the brake members 3b of the brake ends 3a of the two brake arms obtain the brake power source again and are further folded inwards, so that the friction plates obtain the superposed brake acting force to realize the superposed braking on the braked members, and the normally closed one-way brake device 10 in the closed state locks the connecting shaft 9a to be incapable of rotating in the forward direction, thereby effectively maintaining the brake in a stable state with reliable braking effect; the second brake spring component 16 in the state of being further compressed and accumulating energy realizes the superposition braking, and one is to further obtain the superposition braking in the state of realizing the first-stage effective braking by the first brake spring component 7, thereby improving the reliability of the braking effect; secondly, when the friction plate is abraded to cause the brake clearance to be enlarged, the friction plate and the braked component are in a joint and pressing state to obtain the superposed brake realized by the second brake spring component 16, and the enlarged brake clearance enables the continuous stretching stroke of the first brake spring component 7 to influence the brake effect to a certain extent, but the continuous stretching stroke of the first brake spring component 7 enables the related rotating component to continuously form kinetic energy, and the continuously formed kinetic energy can increase the further compression and energy storage effect of the second brake spring component 16, namely the superposed brake effect realized by the second brake spring component 16, so that the normally closed brake of the invention can still be in a stable and reliable brake state; compared with the prior art, the reliability of the braking effect is improved.

The structure of the push rod device 4 in the foregoing embodiments 2 to 9 is the same as that of the push rod device 4 in embodiment 1, and in a specific embodiment of the present invention, the structure and the operation effect of the push rod device 4 in the structure shown in fig. 13 are the same as those of the push rod device 4 in embodiment 1, that is, the push rod device 4 and the brake mechanism 1 in embodiments 2 to 9 can also be the push rod device 4 and the brake mechanism 1 in the structure shown in fig. 13.

In fig. 2, 5 to 13, the outer end of the sleeve type push rod 8 and the outer end of the other end member coaxial with the sleeve type push rod 8 are respectively provided with a connecting lug 8a located on the same axis, and the two connecting lugs 8a are respectively hinged to the driving ends 3c of the two brake arms in the brake mechanism 1; however, the connection mode between the brake mechanism 1 and the electric push rod device in the present invention is not unique because the connecting member for connecting the electric push rod device and the brake mechanism 1 is provided in the conventional brake mechanism 1.

Fig. 14 shows another form of the connection of the brake mechanism 1 and the electric putter device, which is a vertical connection state, the driving ends 3c of the two brake arms in the brake mechanism are connected with the triangular linkage member 3e of the prior art structure, the connecting lug 8a at the lower end of the electric putter device 2 is connected with the hinge shaft of the fixing member which is additionally arranged, and the connecting lug 8a at the upper end of the electric putter device 2 is connected with the hinge shaft of the driving rod in the triangular linkage member 3 e; the connection mode of the brake mechanism 1 and the electric push device 2 in the embodiments 2 to 10 and the connection mode of the brake mechanism 1 and the electric push rod device 2 shown in fig. 14 are common connection modes, and the interaction effect of the two modes is the same.

For the prototype manufactured according to example 9 having the structure shown in fig. 12, the initial braking clearance was set to 1.5mm, and the braking force generated by the electric propulsion device 2 when the braking clearance was increased was measured in the same experimental test bench under the same test conditions as follows:

when the initial value of the brake clearance of the brake is 1.5mm, the measured brake acting force generated by the electric pushing device 2 is 28.6KN, and the working stroke of the electric pushing device 2 is 9 mm;

when the braking clearance is adjusted from 1.5mm to 2.5 mm, the measured braking acting force generated by the electric pushing device 2 is 28.2KN, and the actual working stroke of the electric pushing device 2 is 15 mm;

when the brake clearance is adjusted from 2.5 mm to 3.5 mm, the measured brake acting force generated by the electric pushing device 2 is 27.4KN, and the actual working stroke of the electric pushing device 2 is 21 mm;

when the brake clearance is adjusted from 3.5 mm to 4.5 mm, the measured brake acting force generated by the electric pushing device 2 is 26.7KN, and the actual working stroke of the electric pushing device 2 is 27 mm;

in the above test data: when the braking clearance is adjusted to be 1.5mm to 2.5 mm, namely the friction plate 3d is worn and dropped by 1 mm, the braking clearance exceeds the initial working stroke of the electric pushing device 2 by 6 mm, when the braking clearance is adjusted to be 4.5 mm, namely the friction plate 3d is worn and dropped by 3mm, the braking clearance exceeds the working stroke of the electric pushing device 2 by 18 mm, the braking clearance is 3 times of the working stroke during initial braking, the braking acting force is still 93.4% of the braking acting force during initial braking, the braking acting force is only reduced by 6.6%, and the braking acting force is still in the effective braking range, and the tested braking acting force generated by the electric pushing device 2 can still generate stable and reliable braking effect.

The various embodiments described in the examples of this specification are not all variations of the invention and therefore other variations of the invention are within the scope of the invention.

Claims

1. The normally closed brake with superimposed braking comprises a braking mechanism (1) and an electric pushing device (2);

the brake mechanism (1) comprises symmetrically arranged brake arms (3), the two brake arms (3) are respectively hinged with two fixed members on the base to form a fulcrum Z of the brake arms, the brake arms (3) can swing around the fulcrum Z, one ends of the brake arms (3) are brake ends (3a) and the other ends of the brake arms are drive ends (3c), the brake ends (3a) of the two brake arms (3) are provided with brake members (3b) with symmetrical structures, and brake friction plates (3d) are arranged on the inner sides of brake blocks on the brake members (3 b);

the method is characterized in that:

the electric pushing device (2) comprises a push rod device (4), a motor (5) and a one-way control mechanism (9) for controlling the brake operation condition;

the one-way control mechanism (9) comprises a second shell (17) and a connecting shaft (9a) positioned in the shell, and a normally closed one-way brake mechanism (10) and a normally open one-way brake mechanism (11) are arranged on the connecting shaft (9 a);

the rotating shafts in the transmission system of the electric pushing device (2) comprise a motor shaft (5a), a threaded rotating shaft (4a) in the push rod device (4) and a connecting shaft (9a) in the one-way control mechanism (9), the motor shaft (5a) can drive the connecting shaft (9a) and the threaded rotating shaft (4a) to rotate in the forward direction, and when the threaded rotating shaft (4a) rotates in the reverse direction, the connecting shaft (9a) and the motor shaft (5a) rotate in the reverse direction;

the push rod device (4) is provided with a connecting plate (12) and a first shell (13), the inner end of the first shell (13) is connected with the connecting plate (12), one end of a threaded rotating shaft (4a) is connected with the connecting plate (12), a threaded section (4b) at the other end of the threaded rotating shaft (4a) is located in the first shell (13), a nut (14) is arranged on the threaded section (4b), the threaded section (4b) and the nut (14) form a threaded transmission pair, the thread angle is larger than a self-locking angle, a flange plate (14a) is arranged on the nut (14), when the threaded rotating shaft (4a) rotates, the nut (14) can axially displace along the threaded section (4b), and the flange plate (14a) on the nut (14) displaces along with the displacement;

the outer end of the first shell (13) is provided with a sleeve type push rod (8) with an end wall (8b), the inner end of the sleeve type push rod (8) is provided with a disc piece (15), the disc piece (15) is connected and fixed with the inner end of the sleeve type push rod (8), the wall surface of the sleeve type push rod (8) is matched with a hole in the end wall (13a) of the first shell (13), the outer end of the sleeve type push rod (8) extends out of the end wall (13a) of the first shell (13), a flange plate (14a) on the nut (14) is positioned in the cavity of the sleeve type push rod (8), the diameter of an inner hole (15a) in the disc piece (15) is larger than the outer diameter of the nut (14), and the sleeve type push rod (8) can axially extend out or retract relative to the first shell (13) under the action;

a first brake spring component (7) is arranged in the first shell (13), the first brake spring component (7) is positioned between a disc piece (15) at the inner end of the sleeve type push rod (8) and a connecting plate (12), or between the disc piece (15) at the inner end of the sleeve type push rod (8) and an end wall (13a) of the first shell (13), and the tension of the first brake spring component (7) acts on the sleeve type push rod (8);

a second brake spring member (16) is arranged in the push rod device (4), the second brake spring member (16) is positioned between a flange (14a) on the nut (14) and an end wall (8b) of the sleeve type push rod (8), or between the flange (14a) on the nut (14) and a disc piece (15) at the inner end of the sleeve type push rod (8), and the tension of the second brake spring member (16) acts on the sleeve type push rod (8);

in the electric push rod device (2), the outer end of a sleeve type push rod (8) and the outer end of a component at the other end of the sleeve type push rod (8) which is coaxial are respectively provided with a connecting lug (8a) which is positioned on the same axis, and the connecting lug (8a) is hinged with a driving end (3c) of a brake arm (3) in the brake mechanism.

2. The normally closed superimposed brake actuator according to claim 1, wherein:

the connecting shaft (9a) is of an integral structure and is positioned between the motor shaft (5a) and the threaded rotating shaft (4a), the front end of the motor shaft (5a) is connected with one end of the connecting shaft (9a), and the other end of the connecting shaft (9a) is connected with the inner end of the threaded rotating shaft (4 a);

the normally closed type one-way brake mechanism (10) and the normally open type one-way brake mechanism (11) are both arranged on the connecting shaft (9a) of the integral structure, and the positions of the normally closed type one-way brake mechanism and the normally open type one-way brake mechanism on the connecting shaft (9a) can be interchanged;

the second shell (17) is of an integral structure and corresponds to the connecting shaft (9a) of the integral structure, one end of the second shell (17) is connected with the front end of the shell of the motor (5), and the other end of the second shell is connected with the connecting plate (12);

in the electric push rod device (2), the outer end of a sleeve type push rod (8) and the rear end of a shell of the motor (5) at the other end coaxial with the sleeve type push rod (8) are respectively provided with the connecting lugs (8a) which are positioned on the same axis.

3. The normally closed superimposed brake actuator according to claim 1, wherein:

the connecting shaft (9a) is of an integral structure and is positioned at the rear end of the motor shaft (5a), the rear end of the motor shaft (5a) is connected with the inner end of the connecting shaft (9a), and the front end of the motor shaft (5a) is connected with the inner end of the threaded rotating shaft (4 a);

the second shell (17) is of an integral structure and corresponds to the connecting shaft (9a) of the integral structure, and the inner end of the second shell (17) is connected with the rear end of the shell of the motor (5);

in the electric push rod device (2), the outer end of the sleeve type push rod (8) and the outer end wall of the second shell (17) at the other end coaxial with the sleeve type push rod (8) are respectively provided with the connecting lugs (8a) which are positioned on the same axis.

4. The normally closed superimposed brake actuator according to claim 1, wherein:

the connecting shaft (9a) is of a segmented structure of a first segmented body (9a01) and a second segmented body (9a02), the first segmented body (9a01) is located between the motor shaft (5a) and the threaded rotating shaft (4a), and the second segmented body (9a02) is located at the rear end of the motor shaft (5 a); the first subsection body (9a01) positioned between the motor shaft (5a) and the threaded rotating shaft (4a) is connected with the front end of the motor shaft (5a) at one end and the inner end of the threaded rotating shaft (4a) at the other end, and the second subsection body (9a02) positioned at the rear end of the motor shaft (5a) is connected with the rear end of the motor shaft (5a) at the inner end; the arrangement positions of the first section body (9a01) and the second section body (9a02) can be interchanged;

any one of the normally closed type one-way brake mechanism (10) and the normally open type one-way brake mechanism (11) can be arranged on the subsection body (9a01), the other one of the normally closed type one-way brake mechanism and the normally open type one-way brake mechanism is arranged on the subsection body (9a02), and the normally closed type one-way brake mechanism (10) and the normally open type one-way brake mechanism (11) which are respectively connected to the first subsection body (9a01) and the second subsection body (9a02) can be mutually shifted;

the second shell (17) is of a first sub-shell (1701) and second sub-shell (1702) sub-shell structure, corresponds to a first section (9a01) and a second section (9a02) of the connecting shaft (9a), one end of the first sub-shell (1701) is connected with the front end of the shell of the motor (5), the other end of the first sub-shell is connected with the connecting plate (12), and the inner end of the second sub-shell (1702) is connected with the rear end of the shell of the motor (5);

in the electric push rod device (2), the outer end of the sleeve type push rod (8) and the outer end wall of the second sub-shell (1702) at the other end coaxial with the sleeve type push rod (8) are respectively provided with the connecting lugs (8a) which are positioned on the same axis.

5. The normally closed superimposed brake actuator according to claim 1, wherein:

a speed reducing mechanism (6) is arranged in the electric pushing device (2), and the speed reducing mechanism (6) is provided with an input shaft (6a) and an output shaft (6 b);

the rotating shafts in the transmission system of the electric pushing device (2) comprise the motor shaft (5a), a threaded rotating shaft (4a) in the push rod device (4), a connecting shaft (9a) in the one-way control mechanism (9), an input shaft (6a) and an output shaft (6b) of the speed reducing mechanism (6); the motor shaft (5a) can drive the connecting shaft (9a), the input shaft (6a) and the output shaft (6b) of the speed reducing mechanism and the threaded rotating shaft (4a) to rotate, and when the threaded rotating shaft (4a) rotates reversely, the output shaft (6b) and the input shaft (6a) of the speed reducing mechanism, the connecting shaft (9a) and the motor shaft (5a) rotate reversely.

6. The normally closed superimposed brake actuator according to claim 5, wherein:

the connecting shaft (9a) is of an integral structure and is positioned between a motor shaft (5a) and an input shaft (6a) of the speed reducing mechanism, the front end of the motor shaft (5a) is connected with one end of the connecting shaft (9a), the other end of the connecting shaft (9a) is connected with the input shaft (6a) of the speed reducing mechanism, and an output shaft (6b) of the speed reducing mechanism is connected with the inner end of the threaded rotating shaft (4 a);

the second shell (17) is of an integral structure and corresponds to the connecting shaft (9a) of the integral structure, one end of the second shell (17) is connected with the front end of the shell of the motor (5), and the other end of the second shell is connected with one side wall of the speed reducing mechanism (6);

in the electric push rod device (2), the outer end of a sleeve type push rod (8) and the rear end of a shell of a motor (5) at the other end coaxial with the sleeve type push rod (8) are respectively provided with a connecting lug (8a) which is positioned on the same axis.

7. The normally closed superimposed brake actuator according to claim 5, wherein:

the connecting shaft (9a) is of an integral structure and is positioned between an output shaft (6b) of the speed reducing mechanism and the threaded rotating shaft (4a), the front end of the motor shaft (5a) is connected with an input shaft (6a) of the speed reducing mechanism, the output shaft (6b) of the speed reducing mechanism is connected with one end of the connecting shaft (9a), and the other end of the connecting shaft (9a) is connected with the inner end of the threaded rotating shaft (4 a);

the second shell (17) is of an integral structure and corresponds to the connecting shaft (9a) of the integral structure, one end of the second shell (17) is connected with one side wall of the speed reducing mechanism (6), and the other end of the second shell is connected with the connecting plate (12);

8. The normally closed superimposed brake actuator according to claim 5, wherein:

the connecting shaft (9a) is of an integral structure and is positioned at the rear end of the motor shaft (5a), the inner end of the connecting shaft (9a) is connected with the rear end of the motor shaft (5a), the front end of the motor shaft (5a) is connected with an input shaft (6a) of the speed reducing mechanism, and an output shaft (6b) of the speed reducing mechanism is connected with the inner end of the threaded rotating shaft (4 a);

9. The normally closed superimposed brake actuator according to claim 5, wherein:

the connecting shaft (9a) is of a segmented structure comprising a first segmented body (9a01) and a second segmented body (9a02), the first segmented body (9a01) is located between an output shaft (6b) of the speed reducing mechanism and the threaded rotating shaft (4a), the second segmented body (9a02) is located on the outer end of an input shaft (6a) of the speed reducing mechanism, one end of the first segmented body (9a01) is connected with the output shaft (6b) of the speed reducing mechanism, the other end of the first segmented body is connected with the inner end of the threaded rotating shaft (4a), and the inner end of the second segmented body (9a02) is connected with the outer end of the input shaft (6a) of the speed reducing mechanism; the arrangement positions of the first section body (9a01) and the second section body (9a02) can be interchanged;

the normally closed type one-way brake mechanism (10) is connected to the first sectional body (9a01), the normally open type one-way brake mechanism (11) is connected to the second sectional body (9a02), and the normally closed type one-way brake mechanism (10) and the normally open type one-way brake mechanism (11) which are respectively connected to the sectional body (9a01) and the sectional body (9a02) can be mutually replaced;

the second shell (17) is a sub-shell structure of a first sub-shell (1701) and a second sub-shell (1702), a first section body (9a01) and a second section body (9a02) corresponding to the connecting shaft (9a), one end of the first sub-shell (1701) is connected with the inner side wall of the speed reducing mechanism (6), the other end of the first sub-shell is connected with the connecting plate (12), and the inner end of the second sub-shell (1702) is connected with the outer side wall of the speed reducing mechanism (6);

in the electric push rod device (2), the outer end of the sleeve type push rod (8) and the outer side wall of the speed reducing mechanism (6) at the other end coaxial with the sleeve type push rod (8) are respectively provided with the connecting lugs (8a) which are positioned on the same axis.

10. The normally closed superimposed brake actuator according to claim 5, wherein:

the connecting shaft (9a) is of a segmented structure comprising a first segmented body (9a01) and a second segmented body (9a02), the first segmented body (9a01) is located between the motor shaft (5a) and the inner end of an input shaft (6a) of the speed reducing mechanism, the second segmented body (9a02) is located on the outer end of the input shaft (6a) of the speed reducing mechanism, one end of the first segmented body (9a01) is connected with the inner end of the input shaft (6a) of the speed reducing mechanism, the other end of the first segmented body is connected with the front end of the motor shaft (5a), the inner end of the second segmented body (9a02) is connected with the outer end of the input shaft (6a) of the speed reducing mechanism, and the inner end of an output shaft (6b) of the speed reducing mechanism is connected with the inner end of the threaded; the arrangement positions of the first section body (9a01) and the second section body (9a02) can be interchanged;

the normally closed type one-way brake mechanism (10) is connected to the first sectional body (9a01), the normally open type one-way brake mechanism (11) is connected to the second sectional body (9a02), and the normally closed type one-way brake mechanism (10) and the normally open type one-way brake mechanism (11) which are respectively connected to the sectional body (9a01) and the sectional body (9a02) can be mutually shifted;

the second shell (17) is a sub-shell structure of a first sub-shell (1701) and a second sub-shell (1702), a first section body (9a01) and a second section body (9a02) corresponding to the connecting shaft (9a), one end of the first sub-shell (1701) is connected with the inner side wall of the speed reducing mechanism (6), the other end of the first sub-shell is connected with the front end of the shell of the motor (5), and the inner end of the second sub-shell (1702) is connected with the outer side wall of the speed reducing mechanism (6);

11. A normally closed superimposed brake actuator according to any one of claims 1 to 10, wherein: in the push rod device (4), a first key groove matching structure (18) formed by a sliding key and a sliding groove is arranged on the outer wall surface of the nut (14) and an inner hole (15a) of the disc piece (15), and a second key groove matching structure (19) formed by a groove and a key is arranged on the outer edge of the disc piece (15) at the inner end of the sleeve type push rod (8) and the inner wall surface of the first shell (13).