CN114285223A

CN114285223A - Servo motor brake equipment

Info

Publication number: CN114285223A
Application number: CN202111664283.6A
Authority: CN
Inventors: 陈海峰; 尹小铭; 尹小利; 张文点; 龚玉明
Original assignee: Tianyi Henan Precision Electromechanical Co ltd
Current assignee: Tianyi Henan Precision Electromechanical Co ltd
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2022-04-05
Anticipated expiration: 2041-12-30
Also published as: CN114285223B

Abstract

The invention provides a servo motor brake device, which solves the problem that when the conventional servo motor is stopped, the reciprocating fine tuning movement time is too long, so that the quick response speed of other equipment connected with the servo motor is influenced. When the output shaft of the servo motor is braked, the first electric control telescopic rod extends to push the brake pad to be attached to the rear side face of the brake pad, and the output shaft of the servo motor is subjected to rapid deceleration in the force transmission direction of the brake pad, the shaft sleeve and the output shaft. Meanwhile, the second electric control telescopic rod extends to enable the rear end of the second electric control telescopic rod to be inserted into the brake slot, so that the rotation of the output shaft of the servo motor is stopped immediately, and finally the distance that the servo motor crosses the target position is reduced. Simultaneously, the brake block can also reduce the shearing force that the rear end of the automatically controlled telescopic link of second received when inserting the brake slotted hole with the cooperation of brake block.

Description

Servo motor brake equipment

Technical Field

The invention relates to the technical field of electromechanical control, in particular to a servo motor brake device.

Background

The rotation speed of the rotor of the servo motor is controlled by an input signal and can quickly respond, the servo motor is used as an actuating element in an automatic control system, has the characteristics of small electromechanical time constant, high linearity and the like, and can convert a received electric signal into angular displacement or angular speed on a motor shaft for output. When the servo motor is used in the high-precision field, the servo motor is required to have a quick braking capability so that equipment driven by the servo motor can be quickly and accurately stopped in place.

In the prior art, the friction principle of a brake pad and a brake pad is often adopted to achieve the purpose of quick braking of a servo motor. However, in the actual use process, when the servo motor is stopped, the brake pad and the brake pad are contacted to perform friction to start braking, but due to the inertia of the output shaft and the equipment mounted on the output shaft, the servo motor often crosses the target position when actually stopping for the first time, at this time, the controller controls the servo motor to restart, so that the servo motor forms reciprocating motion near the target position to perform fine adjustment, and much time is wasted in the process of waiting for a relative static interval (the fine adjustment motion in the interval is already fine and can meet the use requirement of high precision) in which the reciprocating fine adjustment motion tends to meet the use requirement, so that the quick response rate of other equipment connected with the servo motor is influenced.

Disclosure of Invention

The invention provides a servo motor brake device, which aims to solve the problems that when the existing servo motor is stopped, the reciprocating fine tuning movement time is too long, and the quick response speed of other equipment connected with the servo motor is influenced.

The technical scheme of the invention is as follows: a servo motor brake device comprises a shaft sleeve and a first housing, wherein the shaft sleeve is used for being sleeved on an output shaft of a servo motor, anti-rotation structures which are matched with each other are arranged on the shaft side surface of the output shaft and the inner side surface of the shaft sleeve, and the anti-rotation structures are used for preventing the shaft sleeve from rotating relative to the output shaft;

a brake pad with an annular plate structure is fixedly arranged on the shaft sleeve, a coaxial annular boss is fixedly arranged at the front part of the brake pad, the diameter of the annular boss is smaller than that of the brake pad, and brake slot holes are circumferentially arranged on the front side surface of the annular boss at intervals;

the first housing is of a buckle cover structure with a rear opening, a front panel of the first housing is provided with a first shaft hole which is through from front to back, the front end of the shaft sleeve is rotatably inserted into the first shaft hole, and the rear part of the first housing is detachably connected with a shell of the servo motor;

the shaft sleeve is provided with a play-preventing structure matched with the first housing, and the play-preventing structure is used for preventing the shaft sleeve from moving back and forth in the first housing;

a first electric control telescopic rod and a second electric control telescopic rod which can control the expansion and contraction are fixedly arranged on the rear side surface of the front panel of the first housing, the rear end of the first electric control telescopic rod is detachably connected with a brake pad, and the brake pad can be attached to or separated from the rear side surface of the brake pad under the action of the first electric control telescopic rod;

the rear end of the second electric control telescopic rod corresponds to the brake slotted hole in the front-back direction, when the second electric control telescopic rod extends, the rear end of the second electric control telescopic rod can be inserted into the brake slotted hole, and when the second electric control telescopic rod contracts, the rear end of the second electric control telescopic rod can be pulled out from the brake slotted hole.

Preferably, the first electric control telescopic rod is a first magnetomotive force resetting telescopic head;

the first magnetomotive reset telescopic head comprises a front cover, a mounting sleeve and a rear sealing cover;

the front cover is of a buckle cover structure with a rear opening, an electromagnetic coil is arranged in the front cover, two first electric connectors are fixedly arranged on a front panel of the front cover, the front part of the front cover is embedded on a front panel of the first housing, and the first electric connectors are exposed outside the first housing;

the front end of the mounting sleeve is detachably connected with the rear part of the front cover, a piston rod capable of moving back and forth is arranged in the mounting sleeve, a permanent magnet is fixedly arranged at the front end of the piston rod, and the permanent magnet corresponds to the electromagnetic coil in the front-back direction;

the rear end detachable connection of back closing cap and installation cover, penetrating round hole I around the middle part of back closing cap is equipped with, and the rear end of piston rod passes round hole and brake lining detachable connection.

Preferably, the diameter of the piston rod is smaller than the inner diameter of the mounting sleeve;

a circular plate is fixedly arranged at the rear end of the piston rod, the peripheral side surface of the circular plate is in sliding contact with the inner side surface of the mounting sleeve, and the permanent magnet is fixedly arranged on the front side surface of the circular plate;

the inside of installation cover is fixed and is equipped with annular first stopper, and the middle part of first stopper forms the round hole II that supplies the piston rod to pass, and first stopper is located the rear of plectane, and first stopper is used for restricting the maximum length that the piston rod stretches out backward with the plectane cooperation.

Preferably, an annular second limiting block is fixedly arranged on the piston rod, and the peripheral side surface of the second limiting block is in sliding contact with the inner side surface of the mounting sleeve;

the piston rod is sleeved with a spring, and the spring is located between the first limiting block and the second limiting block.

Preferably, the second electric control telescopic rod is a second magnetomotive force resetting telescopic head, and the second magnetomotive force resetting telescopic head and the first magnetomotive force resetting telescopic head are identical in structure.

Preferably, the outer portion of the peripheral side surface of the first housing is fixedly provided with a first positive and negative switch and a second positive and negative switch, the first positive and negative switch is electrically connected with a first electric connector of the first magnetomotive force resetting telescopic head, and the second positive and negative switch is electrically connected with a second electric connector of the second magnetomotive force resetting telescopic head.

Preferably, the anti-rotation structure comprises a key groove formed on the shaft side surface of the output shaft and a wedge block fixedly arranged on the inner wall of the shaft sleeve;

the key groove extends forwards and backwards along the axial direction of the output shaft, and the front end of the key groove extends to the front end surface of the output shaft, so that the wedge block can be inserted into the key groove from front to back.

Preferably, the anti-moving structure comprises a first limiting ring and a second limiting ring which are fixedly arranged on the shaft sleeve at intervals from front to back;

a rotatable ball I is embedded on the front side surface of the first limiting ring and is in rolling contact with the rear side surface of the front panel of the first housing;

a limiting ring plate is fixedly arranged in the first housing, a third shaft hole is formed in the middle of the limiting ring plate, and the rear end of the shaft sleeve penetrates through the third shaft hole;

the rear side face of the second limiting ring is embedded with a ball II capable of rotating, and the ball II is in rolling contact with the rear side face of the limiting ring plate.

Preferably, the rear part of the first cover casing is sleeved with a second cover casing, and the front part of the second cover casing is detachably connected with the first cover casing;

and a reserved groove for avoiding the first positive and negative switch and the second positive and negative switch is formed in the peripheral side surface of the second housing.

Preferably, the brake pad is of an annular plate structure, and a fourth shaft hole for the annular boss to pass through is formed in the middle of the brake pad.

The invention has the advantages that: when the device brakes the output shaft of the servo motor, the first electric control telescopic rod extends to further push the brake pad to be attached to the rear side face of the brake pad, and the output shaft of the servo motor is rapidly decelerated along the force transmission direction of the brake pad, the shaft sleeve and the output shaft. Meanwhile, the second electric control telescopic rod extends to enable the rear end of the second electric control telescopic rod to be inserted into the brake slot, so that the rotation of the output shaft of the servo motor is stopped immediately, the distance that the servo motor crosses the target position is finally reduced, the duration of a relative static interval, which tends to meet the use requirement from the reciprocating fine adjustment movement, of the servo motor is further reduced, and the quick response rate of other equipment connected with the servo motor is accelerated.

Simultaneously, the brake block can also reduce the shearing force that the rear end of the automatically controlled telescopic link of second received when inserting the brake slotted hole with the cooperation of brake block.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural view of a brake apparatus in embodiment 1 mounted on a servo motor.

FIG. 2 is a schematic structural diagram of an internal structure of an output shaft of the brake device and the servo motor shown in FIG. 1;

FIG. 3 is a schematic structural diagram of the internal structure of the brake apparatus of FIG. 2 with the output shaft of the servo motor removed;

FIG. 4 is a schematic structural diagram of the brake apparatus shown in FIG. 3 with the sleeve and its various auxiliary components removed;

FIG. 5 is a schematic view of a connection structure between the shaft sleeve and the output shaft of the servo motor at section A-A in FIG. 2;

FIG. 6 is a schematic view of the bushing of FIG. 2 and its various accessory components;

FIG. 7 is a front perspective schematic view of the brake pad of FIGS. 2 and 3 and the various attachment members thereon;

FIG. 8 is a front view in elevation of the damper blade of FIG. 4 and an attachment member thereon;

FIG. 9 is a front angled structural view of the first stop collar plate of FIG. 6;

FIG. 10 is an enlarged view of the first magnetomotive force restoring telescoping head of FIG. 2;

in the figure, 1, a shell, 2, an output shaft, 3, a brake device, 4, a shaft sleeve, 401, a wedge block, 5, a first cover shell, 501, a first shaft hole, 6, a first magnetomotive force resetting telescopic head, 7, a first mounting seat, 8, a second magnetomotive force resetting telescopic head, 9, a second mounting seat, 10, a brake pad, 11, an annular boss, 1101, a brake slot hole, 12, a brake pad, 1201, a second shaft hole, 1202, a connecting seat, 13, a limit ring plate, 1301, a third shaft hole, 14, a first limit ring, 1401, a ball I, 15, a second limit ring, 16, a first positive and negative switch, 17, a second positive and negative switch, 18, a second cover shell, 19, a baffle ring, 20, a front cover, 21, an electromagnetic coil, 22, a mounting pipe, 23, a first limit block, 24, a piston rod, 25, a permanent magnet, 26, a circular plate, 27, a second limit block, 28, a thread groove, 29, a spring, 30 and a rear seal cover, 31. a first electrical connector.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.

Example 1: a servo motor brake device is shown in figure 1, and the brake device is a brake device 3 arranged on an output shaft 2 of a servo motor.

As shown in fig. 2, the brake device 3 includes a shaft sleeve 4 and a first housing 5, the shaft sleeve 4 is used to be sleeved on the output shaft 2 of the servo motor, anti-rotation structures which are mutually matched are arranged on the shaft side surface of the output shaft 2 and the inner side surface of the shaft sleeve 4, the anti-rotation structures are used to prevent the shaft sleeve 4 from rotating relative to the output shaft 2, so that the shaft sleeve 4 can rotate along with the driving of the output shaft 2.

Specifically, as shown in fig. 2, 5 and 6, the rotation preventing structure includes a key groove opened on the shaft side surface of the output shaft 2 and a wedge 401 fixedly provided on the inner wall of the boss 4.

The key groove extends forward and backward in the axial direction of the output shaft 2, and the front end of the key groove extends to the front end surface of the output shaft 2 so that the wedge 401 can be inserted into the key groove from the front to the rear.

The shaft sleeve 4 and the output shaft 2 are arranged into a plug-in type detachable connection structure, so that the brake device 3 can be rapidly installed and detached.

As shown in fig. 2, 3 and 7, a brake pad 10 of an annular plate structure is fixed on the sleeve 4, a coaxial annular boss 11 is fixed at the front part of the brake pad 10, the diameter of the annular boss 11 is smaller than that of the brake pad 10, and brake slot holes 1101 are circumferentially arranged on the front side surface of the annular boss 11 at intervals.

As shown in fig. 2, the first housing 5 is a buckle cover structure with an open rear, a front panel of the first housing 5 is provided with a first shaft hole 501 penetrating from front to back, the front end of the shaft sleeve 4 is rotatably inserted into the first shaft hole 501, and the rear part of the first housing 5 is connected with the front part of the housing 1 of the servo motor by a screw.

The shaft sleeve 4 is provided with a play-preventing structure matched with the first housing 5, and the play-preventing structure is used for preventing the shaft sleeve 4 from moving back and forth in the first housing 5.

Specifically, as shown in fig. 2 and 3, the anti-play structure includes a first retainer ring 14 and a second retainer ring 15 fixed to the sleeve 4 at a front-rear interval.

As shown in fig. 9, a rotatable ball I1401 is fitted on the front side surface of the first retainer ring 14, and the ball I1401 is in rolling contact with the rear side surface of the front panel of the first housing 5.

A limit ring plate 13 is fixedly arranged in the first housing 5, a third shaft hole 1301 is formed in the middle of the limit ring plate 13, and the rear end of the shaft sleeve 4 penetrates through the third shaft hole 1301;

the rear side face of the second limit ring 15 is embedded with a ball II capable of rotating, and the ball II is in rolling contact with the rear side face of the limit ring plate 13.

The ball I1401 is arranged on the first limit ring 14 to reduce the abrasion speed of the first limit ring 14 and the front panel of the first housing 5; balls II are provided on the second retainer ring 15 to reduce the wear rate of the second retainer ring 15 and the retainer ring plate 13.

The rear side face of the front panel of the first housing 5 is fixedly provided with four first electric control telescopic rods and four second electric control telescopic rods which can control the stretching and retracting in an annular equidistant mode.

As shown in fig. 2, 3, 4 and 10, the first electrically controlled telescopic rod in this embodiment is the first magnetomotive force restoring telescopic head 6.

As shown in fig. 10, the first magnetomotive return telescoping head 6 includes a front cover 20, a mounting sleeve 22, and a rear cover 30.

The front cover 20 is a buckle cover structure with a rear opening, an electromagnetic coil 21 is arranged in the front cover 20, two first electric connectors 31 are fixedly arranged on a front panel of the front cover 20, the front part of the front cover 20 is embedded on the front panel of the first housing 5, and the first electric connectors 31 are exposed outside the first housing 5.

The front end of the mounting sleeve 22 is connected with the rear part of the front cover 20 through a screw, a piston rod 24 capable of moving back and forth is arranged in the mounting sleeve 22, and the diameter of the piston rod 24 is smaller than the inner diameter of the mounting sleeve 22.

A permanent magnet 25 is fixed to the front end of the piston rod 24, and the permanent magnet 25 corresponds to the electromagnetic coil 21 in the front-rear direction.

The telescopic motion of the piston rod 24 is realized by controlling the direction of the current flowing through the electromagnetic coil 21 to adjust the magnetic pole of the electromagnetic coil 21 toward one end of the permanent magnet 25, and attracting or repelling the permanent magnet 25.

A disk 26 is fixed to the rear end of the piston rod 24, the peripheral side surface of the disk 26 is in sliding contact with the inner side surface of the mounting sleeve 22, and a permanent magnet 25 is fixed to the front side surface of the disk 26.

In order to further improve the stability of the first magnetomotive reset telescopic head 6 during use, a first mounting seat 7 of a sleeve structure is welded on the first housing 5, a raised annular plate I is arranged in the middle of the mounting sleeve 22, and the annular plate I is connected with the front part of the first mounting seat 7 through a screw.

An annular first limiting block 23 is fixedly arranged inside the mounting sleeve 22, a round hole II for the piston rod 24 to pass through is formed in the middle of the first limiting block 23, the first limiting block 23 is located behind the circular plate 26, the first limiting block 23 is matched with the circular plate 26 to limit the maximum length of the piston rod 24 extending backwards, the first limiting block is used for preventing the piston rod 24 from being separated from the mounting sleeve 22, and the second limiting block is used for preventing the circular plate 26 from moving backwards too far to cause that the piston rod 24 cannot be reset due to the suction force on the permanent magnet 25 after the electromagnetic coil 21 changes the magnetic pole.

In order to further increase the response speed of the piston rod 24 when extending out, in the present embodiment, an annular second stopper 27 is fixedly disposed on the plunger rod 24, and the peripheral side surface of the second stopper 27 is in sliding contact with the inner side surface of the mounting sleeve 22; the piston rod 24 is sleeved with a spring 29, and the spring 29 is located between the first limiting block 23 and the second limiting block 27.

The rear sealing cover 30 is connected with the rear end of the mounting sleeve 22 through a screw, a front through round hole I and a rear through round hole I are formed in the middle of the rear sealing cover 30, and the rear end of the piston rod 24 penetrates through the round holes to be detachably connected with the brake pad 12.

Specifically, the rear end of the piston rod 24 is provided with a plurality of thread grooves 28 at equal intervals in the circumferential direction.

The brake lining 12 is of an annular plate structure, and a fourth shaft hole for the annular boss 11 to pass through is formed in the middle of the brake lining 12.

The rear side of the brake lining 12 is provided with connecting seats 1202 which correspond to the first magnetomotive force restoring telescopic heads 6 one by one in the front-back direction at equal intervals along the circumferential direction, the connecting seats 1202 are of a sleeve structure, the rear end of the piston rod 24 is inserted into the connecting seats 1202, the connecting seats 1202 are provided with screw holes which correspond to the thread grooves 28 one by one, and the screw holes are provided with screw rods which are in threaded connection with the thread grooves 28.

The brake pad 12 is attached to or detached from the rear side surface of the brake pad 10 under the telescopic action of the first magnetomotive force resetting telescopic head 6.

In this embodiment, the second electric control telescopic rod adopts the second magnetomotive force resetting telescopic head 8, and the second magnetomotive force resetting telescopic head 8 and the first magnetomotive force resetting telescopic head 6 have the same structure. In a similar way, in order to improve the stability of the second magnetomotive reset telescopic head 8 in use, the second mounting seat 9 of the sleeve structure is welded on the first housing 5, the middle part of the mounting sleeve of the second magnetomotive reset telescopic head 8 is provided with a raised annular plate II, and the annular plate II is connected with the front part of the second mounting seat 9 through screws.

The rear end of the piston rod of the second magnetomotive force resetting telescopic head 8 corresponds to the brake slot 1101 in a front-back mode, when the second magnetomotive force resetting telescopic head 8 extends, the rear end of the piston rod of the second magnetomotive force resetting telescopic head 8 can be inserted into the brake slot 1101, and when the second magnetomotive force resetting telescopic head 8 contracts, the rear end of the piston rod of the second magnetomotive force resetting telescopic head 8 can be pulled out of the brake slot 1101.

When the servo motor is used, the starting time of the second magnetomotive force resetting telescopic head 8 is delayed by about 0.1-0.5 seconds relative to the starting time of the first magnetomotive force resetting telescopic head 6 (the specific delay time is determined according to the inertia of the output shaft 2 when the servo motor is stopped and the inertia can be generally determined according to the length or the angle of the servo motor which crosses the target position under the action of the brake pad 12 and the brake pad 10 after the servo motor is stopped, a user automatically sets and adjusts the delay time for starting the second magnetomotive force resetting telescopic head 8 by using a PLC (programmable logic controller), so that the brake pad 12 is firstly contacted with the brake pad 10, and the second magnetomotive force resetting telescopic head 8 starts to move after the certain rotating speed of the output shaft 2 is reduced.

Compared with telescopic rod structures such as a cylinder and an oil cylinder, the electromagnetic coil 21 and the permanent magnet 25 are matched to realize the control of the telescopic motion of the piston rod 24, firstly, the structure is smaller, the size of the brake device 3 is reduced, and further, the extension length occupied by the output shaft 2 of the servo motor is reduced, so that the extension total length (extending out of the shell 1) of the output shaft 2 can be reduced as far as possible after the output shaft 2 meets the required extension length for being connected with other equipment, and the problem that when the servo motor moves due to the fact that the extension total length of the output shaft 2 is too long, the precision of the other connected equipment is reduced due to the fact that one end, far away from the shell 1, of the output shaft 2 is easy to vibrate is avoided; secondly, an electric control mode is directly adopted, so that the operation and the control are easy, and auxiliary equipment such as an oil pump or an air pump and the like is not required; thirdly, the magnitude of the attractive force and the repulsive force of the electromagnetic coil 21 can be adjusted through an additional adjustable resistor to adjust the magnitude of the current flowing through the electromagnetic coil 21, so that the electromagnetic coil 21 can have enough repulsive force to the permanent magnet 25, and further enough friction force can be generated when the brake pad 12 is attached to the brake pad 10, and the rotating speed of the output shaft 2 is rapidly stopped.

When the electromagnetic coil 21 starts to change the magnetic pole and loses the attraction force on the permanent magnet 25, the spring 29 in a compressed state pushes the piston rod 24 to pop up instantly, an initial thrust is provided for popping up the piston rod 24, and the response speed of the first magnetomotive force resetting telescopic head 6 is accelerated.

When the electromagnetic coil 21 finishes the magnetic pole conversion and begins to apply repulsive force to the permanent magnet 25, the electromagnetic coil 21 provides secondary thrust for the ejection of the piston rod 24, and the two are combined, so that the response speed of the first magnetomotive force reset telescopic head 6 is greatly accelerated, and similarly, the response speed of the second magnetomotive force reset telescopic head 8 is also greatly accelerated, further, the brake pad 12 can be rapidly attached to the brake pad 10 to rapidly reduce the rotation speed of the output shaft 2, the rotation of the output shaft 2 is rapidly stopped by the blocking action of the annular boss 11 after the rear end of the piston rod of the second magnetomotive force resetting telescopic head 8 is delayed to fall into the brake slot 1101, and finally the distance of the servo motor over the target position is reduced, therefore, the time duration of the relative static interval that the servo motor tends to meet the use requirement from the reciprocating fine adjustment movement is shortened, and the quick response speed of other equipment connected with the servo motor is accelerated.

Meanwhile, the brake pad 12 can be matched with the brake pad 10, and the shearing force applied to the piston rod of the second magnetomotive force resetting telescopic head 8 when the piston rod is inserted into the brake slot 1101 can also be reduced.

In order to control the first magnetomotive force resetting telescopic head 6 and the second magnetomotive force resetting telescopic head 8, a first positive and negative switch 16 and a second positive and negative switch 17 are fixedly arranged outside the peripheral side surface of the first housing 5.

All the first magnetomotive force resetting telescopic heads 6 are electrically connected with the first positive and negative switch 16 after being connected in series with the same poles, and all the second magnetomotive force resetting telescopic heads 8 are electrically connected with the second positive and negative switch 17 after being connected in series with the same poles.

When the magnetic resetting telescopic head is used, the first positive and negative switches 16 simultaneously control the telescopic motion of all the first magnetic power resetting telescopic heads 6, and the second positive and negative switches 17 simultaneously control the telescopic motion of all the second magnetic power resetting telescopic heads 8.

In order to prevent the connecting wires of the first magnetomotive reset telescopic head 6 and the first positive and negative switch 16 and the connecting wires of the second magnetomotive reset telescopic head 8 and the second positive and negative switch 17 from being exposed outside, thereby generating potential safety hazards and influencing the aesthetic effect, the second housing 18 is sleeved on the rear part of the first housing 5, the first housing 5 is fixedly provided with the baffle ring 19, the front end of the second housing 18 is erected on the baffle ring 19, and the front end of the second housing 18 is connected with the baffle ring 19 through screws.

In order to facilitate the assembly and disassembly, the first housing 5 in this embodiment is a two-petal structure that is equally divided along the axial section, a wing plate is arranged at the joint of the two-petal structure, and the upper wing plate and the lower wing plate on the same side are connected through a bolt.

The peripheral side surface of the second housing 18 is provided with a reserved groove for avoiding the first positive and negative switch 16 and the second positive and negative switch 17.

Example 2: a brake device of a servo motor is characterized in that a first electric control telescopic rod and a second electric control telescopic rod in the embodiment are both of electric telescopic rod structures. The other structure is the same as embodiment 1.

Example 3: in the brake device of the servo motor, a spring 29 is not arranged in a first magnetic power reset telescopic head 6 in the embodiment. The other structure is the same as embodiment 1.

Example 4: a servo motor brake device, the ball I1401 is no longer set on the front side of the first spacing ring 14 in this embodiment, the front side of the first spacing ring 14 is in sliding contact with the back side of the front panel of the first housing 5; the rear side of the second retainer ring 15 is no longer provided with balls II, and the rear side of the second retainer ring 15 is in sliding contact with the rear side of the retainer ring plate 13. The other structure is the same as embodiment 1.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a servo motor brake equipment which characterized in that: the servo motor comprises a shaft sleeve (4) and a first housing (5), wherein the shaft sleeve (4) is used for being sleeved on an output shaft (2) of a servo motor, anti-rotation structures which are matched with each other are arranged on the shaft side surface of the output shaft (2) and the inner side surface of the shaft sleeve (4), and the anti-rotation structures are used for preventing the shaft sleeve (4) from rotating relative to the output shaft (2);

a brake pad (10) with an annular plate structure is fixedly arranged on the shaft sleeve (4), a coaxial annular boss (11) is fixedly arranged at the front part of the brake pad (10), the diameter of the annular boss (11) is smaller than that of the brake pad (10), and brake slot holes (1101) are circumferentially arranged on the front side surface of the annular boss (11) at intervals;

the first cover shell (5) is of a buckle cover structure with an opening at the back, a front panel of the first cover shell (5) is provided with a first shaft hole (501) which is through from front to back, the front end of the shaft sleeve (4) is rotatably inserted in the first shaft hole (501), and the back part of the first cover shell (5) is detachably connected with the shell (1) of the servo motor;

the shaft sleeve (4) is provided with a play-preventing structure matched with the first housing (5), and the play-preventing structure is used for preventing the shaft sleeve (4) from moving back and forth in the first housing (5);

a first electric control telescopic rod and a second electric control telescopic rod which can control the expansion and contraction are fixedly arranged on the rear side surface of the front panel of the first housing (5), the rear end of the first electric control telescopic rod is detachably connected with a brake pad (12), and the brake pad (12) can be attached to or detached from the rear side surface of the brake pad (10) under the action of the first electric control telescopic rod;

the rear end of the second electric control telescopic rod corresponds to the brake slotted hole (1101) in a front-back mode, when the second electric control telescopic rod extends, the rear end of the second electric control telescopic rod can be inserted into the brake slotted hole (1101), and when the second electric control telescopic rod retracts, the rear end of the second electric control telescopic rod can be pulled out of the brake slotted hole (1101).

2. A servo motor brake apparatus as claimed in claim 1, wherein: the first electric control telescopic rod is a first magnetomotive force resetting telescopic head (6);

the first magnetomotive reset telescopic head (6) comprises a front cover (20), a mounting sleeve (22) and a rear sealing cover (30);

the front cover (20) is of a buckle cover structure with a rear opening, an electromagnetic coil (21) is arranged in the front cover (20), two first electric connectors (31) are fixedly arranged on a front panel of the front cover (20), the front part of the front cover (20) is embedded on the front panel of the first housing (5), and the first electric connectors (31) are exposed outside the first housing (5);

the front end of the mounting sleeve (22) is detachably connected with the rear part of the front cover (20), a piston rod (24) capable of moving back and forth is arranged in the mounting sleeve (22), a permanent magnet (25) is fixedly arranged at the front end of the piston rod (24), and the permanent magnet (25) corresponds to the electromagnetic coil (21) in the front and back direction;

the rear end of the rear sealing cover (30) is detachably connected with the rear end of the mounting sleeve (22), a front through round hole I and a rear through round hole I are formed in the middle of the rear sealing cover (30), and the rear end of the piston rod (24) penetrates through the round hole to be detachably connected with the brake pad (12).

3. A servo motor brake apparatus according to claim 2, wherein: the diameter of the piston rod (24) is smaller than the inner diameter of the mounting sleeve (22);

a circular plate (26) is fixedly arranged at the rear end of the piston rod (24), the peripheral side surface of the circular plate (26) is in sliding contact with the inner side surface of the mounting sleeve (22), and a permanent magnet (25) is fixedly arranged on the front side surface of the circular plate (26);

an annular first limiting block (23) is fixedly arranged inside the mounting sleeve (22), a round hole II for a piston rod (24) to penetrate through is formed in the middle of the first limiting block (23), the first limiting block (23) is located behind the circular plate (26), and the first limiting block (23) is matched with the circular plate (26) to limit the maximum length of the piston rod (24) extending backwards.

4. A servo motor brake apparatus according to claim 3, wherein: an annular second limiting block (27) is fixedly arranged on the piston rod (24), and the peripheral side surface of the second limiting block (27) is in sliding contact with the inner side surface of the mounting sleeve (22);

a spring (29) is sleeved on the piston rod (24), and the spring (29) is located between the first limiting block (23) and the second limiting block (27).

5. A servo motor brake apparatus according to any one of claims 2 to 4, wherein: the second electric control telescopic rod is a second magnetomotive force resetting telescopic head (8), and the second magnetomotive force resetting telescopic head (8) has the same structure with the first magnetomotive force resetting telescopic head (6).

6. A servo motor brake apparatus according to claim 5, wherein: the outside of the peripheral side face of the first housing (5) is fixedly provided with a first positive and negative switch (16) and a second positive and negative switch (17), the first positive and negative switch (16) is electrically connected with a first electric connector (31) of the first magnetomotive force resetting telescopic head (6), and the second positive and negative switch (17) is electrically connected with a second electric connector of the second magnetomotive force resetting telescopic head (8).

7. A servo motor brake apparatus according to any one of claims 1 to 4, wherein: the anti-rotation structure comprises a key groove arranged on the shaft side surface of the output shaft (2) and a wedge block (401) fixedly arranged on the inner wall of the shaft sleeve (4);

the key groove extends forwards and backwards along the axial direction of the output shaft (2), and the front end of the key groove extends to the front end surface of the output shaft (2) so that the wedge block (401) can be inserted into the key groove from the front to the back.

8. A servo motor brake apparatus according to any one of claims 1 to 4, wherein: the anti-moving structure comprises a first limiting ring (14) and a second limiting ring (15) which are fixedly arranged on the shaft sleeve (4) at intervals in the front-back direction;

a ball I (1401) capable of rotating is embedded on the front side surface of the first limiting ring (14), and the ball I (1401) is in rolling contact with the rear side surface of the front panel of the first housing (5);

a limit ring plate (13) is fixedly arranged in the first housing (5), a third shaft hole (1301) is formed in the middle of the limit ring plate (13), and the rear end of the shaft sleeve (4) penetrates through the third shaft hole (1301);

the rear side face of the second limiting ring (15) is embedded with a ball II capable of rotating, and the ball II is in rolling contact with the rear side face of the limiting ring plate (13).

9. A servo motor brake apparatus according to any one of claims 1 to 4, wherein:

the rear part of the first cover shell (5) is sleeved with a second cover shell (18), and the front part of the second cover shell (18) is detachably connected with the first cover shell (5);

and a reserved groove for avoiding the first positive and negative switch (16) and the second positive and negative switch (17) is formed on the peripheral side surface of the second housing (18).

10. A servo motor brake apparatus according to any one of claims 1 to 4, wherein: the brake pad (12) is of an annular plate structure, and a fourth shaft hole for the annular boss (11) to penetrate through is formed in the middle of the brake pad (12).