CN211617653U - Automatic emergency brake booster for vehicle - Google Patents
Automatic emergency brake booster for vehicle Download PDFInfo
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- CN211617653U CN211617653U CN201922434704.0U CN201922434704U CN211617653U CN 211617653 U CN211617653 U CN 211617653U CN 201922434704 U CN201922434704 U CN 201922434704U CN 211617653 U CN211617653 U CN 211617653U
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Abstract
When the motor that produces the unit breaks down in order to solve traditional vehicle brake booster when the electrodynamic force, when the driver tramples brake pedal and brakes, need pay out great strength, increased driver's burden to and brake pedal experience unadjustable technical problem, the utility model provides an automatic emergency brake booster of vehicle. The utility model provides a support and direction unit include footboard power support and electric power support to when the support resets, can only reset the footboard power support, also can reset footboard power support and electric power support respectively, when the electric power production unit breaks down and can only the manual braking, the scheme that resets in the middle of the traditional single support relatively, the driver need not to overcome electric power support reset spring's resistance, consequently the footboard power that need pay out is less, can alleviate driver's burden. The utility model discloses can set up footboard power elastic element for footboard power transmission pole alone to the brake pedal impression of different grade type vehicle can adapt.
Description
Technical Field
The utility model relates to an automatic emergency brake booster of vehicle.
Background
The conventional vehicle brake booster mostly adopts a structure of a single bracket and a middle reset, and when the brake booster is reset, the bracket is reset through a middle reset spring, so that the pedal force transmission unit and the electric force transmission unit are driven by the bracket to reset simultaneously, for example, the brake boosters disclosed in patent documents with publication numbers of CN 107949509 a, CN 106427966 a and CN 105398440B. The reset mode has the following disadvantages:
1. when the motor of the electric power generation unit fails, a driver needs to exert large force when manually stepping on the brake pedal to brake, and the burden of the driver is increased.
2. The brake pedal is not adjustable, and can not adapt to different vehicle types.
SUMMERY OF THE UTILITY MODEL
When the motor that produces the unit breaks down in order to solve traditional vehicle brake booster when the electrodynamic force, when the driver tramples brake pedal and brakes, need pay out great strength, increased driver's burden to and brake pedal experience unadjustable technical problem, the utility model provides an automatic emergency brake booster of vehicle.
The technical scheme of the utility model is that:
an automatic emergency brake booster for a vehicle,
comprises a pedal force input unit, a pedal force transmission unit, an electric power transmission unit, a braking force output unit and a supporting and guiding unit;
the pedal force transmission unit comprises a pedal force transmission rod and a pedal force transmission plate arranged on the pedal force transmission rod;
the supporting and guiding unit comprises a bracket assembly and a guide rail assembly;
the braking force output unit is capable of receiving pedal force from the pedal force transmission unit and/or electric power from the electric power transmission unit and transmitting the pedal force and/or the electric power to a brake master cylinder of the vehicle;
it is characterized in that:
the bracket assembly comprises a pedal force bracket and an electric power bracket;
the pedal force bracket comprises a pedal push rod and at least one pedal force bracket arm connected with the pedal push rod; the electric power support comprises an electric push rod and at least one electric power support arm connected with the electric push rod; the pedal push rod and the electric push rod are both of tubular structures with openings at two ends, and the pedal push rod is axially embedded into the electric push rod and can relatively slide along the axial direction;
the end part of the pedal force bracket arm is connected with the guide rail component in a sliding way;
the end part of the electric power support arm is connected with the guide rail component in a sliding way;
the pedal force transmission rod is arranged in the pedal push rod;
a first guide hole is formed in the pedal force support arm, and a second guide hole is formed in the electric power support arm;
the pedal force transmission plate is arranged on the outer side wall of the pedal force transmission rod, and an anti-rotation triggering column is arranged on the pedal force transmission plate; the anti-rotation triggering column sequentially penetrates through the first guide hole and the second guide hole.
The end part of the pedal force transmission rod, which is close to the braking force output unit, is provided with a pedal elastic element; an electric following stroke is formed between the pedal elastic element and the braking force output unit; the electric following stroke is an idle stroke or a micro-force stroke.
Further, the electric following stroke is fixed and unchangeable when the brake is not applied and the brake is applied actively; during the power-assisted braking process, the electric follow-up stroke is changed.
Further, the track assembly includes a pedal force track and an electric power track; the pedal force guide rail is an inner and/or outer guide structure; the electric power guide rail is an inner and/or outer guide structure; the end part of the pedal force bracket arm is provided with a pedal force guide element which is connected with the pedal force guide rail in a sliding way; the end part of the electrodynamic force support arm is provided with an electrodynamic force guide element which is in sliding connection with the electrodynamic force guide rail.
Alternatively, the first and second electrodes may be,
the guide rail assembly comprises a guide rail which is an inner and/or outer guide structure;
the end part of the pedal force bracket arm is provided with a pedal force guide element which is connected with the guide rail in a sliding way; the end part of the electrodynamic force support arm is provided with an electrodynamic force guide element which is in sliding connection with the guide rail.
Further, the electric power transmission unit comprises a transmission gear nut, an external thread arranged on the outer wall of the electric push rod, a power-assisted pushing piece and an electric elastic element; the transmission gear nut is composed of a nut with internal threads and a transmission gear with external gear teeth, the transmission gear is arranged outside the nut, the nut is sleeved outside the electric push rod and is connected with the external threads through the internal threads to drive the electric push rod to move along the axial direction; the boosting push piece is arranged between the pedal force bracket and the braking force output unit; the boosting push piece is integrally bowl-shaped, one end of the boosting push piece is connected with a pedal force support arm of the pedal force support, and the other end of the boosting push piece is contacted with the braking force output unit; the bottom of the power-assisted pushing piece is provided with a through hole for the elastic element of the pedal to pass through; the electric elastic element is arranged outside the pedal push rod 6 and is positioned between the pedal force bracket and the electric power bracket; the electric elastic element is of an integrated annular structure or a split structure consisting of a plurality of elastic bodies which are uniformly distributed along the circumference.
Alternatively, the first and second electrodes may be,
the electric power transmission unit comprises a transmission gear nut with internal threads and external transmission teeth, external threads arranged on the outer wall of the electric push rod, a power-assisted push piece and an electric elastic element; the transmission gear nut is sleeved outside the electric push rod and is connected with the external thread through the internal thread to drive the electric push rod to move along the axial direction; the boosting push piece is arranged between the pedal force bracket and the braking force output unit; the boosting push piece is integrally bowl-shaped, one end of the boosting push piece is connected with a pedal force support arm of the pedal force support, and the other end of the boosting push piece is contacted with the braking force output unit; the bottom of the power-assisted pushing piece is provided with a through hole for the elastic element of the pedal to pass through; the electric elastic element is arranged in the boosting push piece and is positioned between the pedal elastic element and the braking force output unit; the electric elastic element is of an integrated annular structure or a split structure consisting of a plurality of elastic bodies which are uniformly distributed along the circumference; under the action of pedal force and/or electric force, the pedal elastic element can pass through the electric elastic element to transmit the braking force to the braking force output unit.
Further, the elastic coefficients of the pedal elastic element and the electrodynamic elastic element may be the same or different.
Furthermore, the pedal elastic element comprises a first elastic body and a second elastic body which are sequentially arranged along the transmission direction of the braking force, one end of the second elastic body is connected with the first elastic body, and the other end of the second elastic body is contacted with the braking force output unit; the elastic coefficients of the first elastic body and the second elastic body are different.
Further, the electromotive force is generated by an electric motor; alternatively, the electrical force is generated by a pneumatic, hydraulic, electro-mechanical or electro-thermal force generating mechanism.
Compared with the prior art, the utility model has the advantages that:
1. the utility model provides a support and direction unit include footboard power support and electric power support to when the support resets, can only reset the footboard power support, also can reset footboard power support and electric power support respectively, when the electric power production unit breaks down and can only the manual braking, the scheme that resets in the middle of the traditional single support relatively, the driver need not to overcome electric power support reset spring's resistance, consequently the footboard power that need pay out is less, can alleviate driver's burden.
2. The utility model discloses a but the elastic coefficient of pedal elastic element and electronic elastic element independent control elastic coefficient also can adjust the elastic coefficient respectively to can adapt the brake pedal impression of different grade type vehicle, for example car, sedan-chair sports car, sports car (elastic coefficient is little), SUV, cross country vehicle type (elastic coefficient is big) in the passenger's motorcycle type.
Drawings
Fig. 1 is a schematic diagram of the embodiment of the present invention in cooperation with a vehicle master cylinder (the electromotive force generating unit is not shown).
FIG. 2 is a perspective view of the embodiment of the present invention (after removing the upper cover)
Fig. 3 is a schematic view illustrating the pedal force support, the electric power support, and the pedal force transmission plate according to the embodiment of the present invention.
Fig. 4 is an exploded view of fig. 3.
Fig. 5 is a schematic view of the matching between the transmission gear nut and the electric push rod in the embodiment of the present invention.
Fig. 6 is an exploded view of fig. 5.
Fig. 7 is a schematic diagram of the cooperation of the electromotive force generating unit and the electromotive force transmitting unit according to the embodiment of the present invention.
Fig. 8 is a schematic structural diagram of an electric power support in an embodiment of the present invention.
Fig. 9 is a schematic structural view of the pedal force transmission plate according to the embodiment of the present invention.
Fig. 10 is a schematic view of a power-assisted pushing element and a connector according to an embodiment of the present invention.
Fig. 11 is an exploded view of the drive gear nut in the embodiment of the present invention.
Fig. 12 is a schematic view of the state of the clip foot waiting to be separated according to the embodiment of the present invention.
Fig. 13 is a schematic view of the embodiment of the present invention showing the separated state of the clamping legs.
Fig. 14 is a schematic view of a mechanism in a rest state according to an embodiment of the present invention.
Fig. 15 is a schematic view of the braking state of the mechanism according to the embodiment of the present invention.
Fig. 16 is a schematic view showing the cooperation of another embodiment of the present invention with a vehicle master cylinder (electric power generating unit not shown).
Fig. 17 is a schematic view showing the cooperation of another embodiment of the present invention with a vehicle master cylinder (the electric power generating unit is not shown).
Fig. 18 is a schematic view showing the cooperation of a further embodiment of the present invention with a vehicle master cylinder (the electric power generating unit is not shown).
Description of reference numerals:
1-pedal force input rod, 2-motor output gear, 3-intermediate gear set, 4-driving gear box, 41-screw box, 42-driving gear, 5-electric push rod, 51-external thread, 6-pedal push rod, 7-pedal force transmission rod, 71-front section, 72-rear section, 711-ball chuck, 721-claw type clamping groove, 8-pedal force transmission plate, 10-anti-rotation triggering column, 101-first carrier, 102-second carrier, 11-pedal force return spring, 12-electric power bracket, 120-electric power bracket arm, 121-second guide hole, 122-elastic accessory, 13-pedal force bracket, 130-pedal force bracket arm, 131-first guide hole, 14-electric power guide element, 15-pedal force guide element, 17-boosting push piece, 18-electric elastic element, 19-braking force output element A, 20-braking force output element B, 21-bearing bush, 22-flange steel plate, 23-bottom shell, 24-bearing, 25-booster fixing bolt, 26-middle shell, 261-bolt fixing hole, 262-guide rail, 27-upper cover, 28-brake master pump, 29-master pump fixing bolt, 31-motor, 33-electric power support return spring, 35-pedal elastic element, 36-magnet, 37-connector, 38-Hall sensor and 39-sensor fixing frame.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
The first embodiment is as follows:
the vehicle automatic emergency brake booster provided by the embodiment comprises a shell, a pedal force input unit, a pedal force transmission unit, a supporting and guiding unit, an electric power transmission unit, an electric power generation unit, a resetting unit and a braking force output unit.
1. Shell body
As shown in fig. 1-2, the housing includes an upper cover 27, a middle housing 26 and a bottom shell 23 connected in sequence; a through hole for the columnar input end of the master cylinder 28 to pass through is formed in the middle of the upper cover 27, and the master cylinder 28 and the upper cover 27 are fixed on the middle shell 26 together through a master cylinder fixing bolt 29; the bottom shell 23 is fixedly mounted on the vehicle through a booster fixing bolt 25; a flange steel plate 22 is arranged on the outer side of the bottom shell 23; a connector 37 is also mounted in the bottom shell 23.
2. Pedal force input unit
As shown in fig. 1, the pedal force input unit for receiving a pedal force from a driver includes a pedal force input rod 1, one end of the pedal force input rod 1 being connected to a brake pedal of a vehicle, and the other end thereof being connected to a pedal force transmission unit.
3. Pedal force transmission unit
The pedal force transmission unit is used for transmitting the pedal force to the braking force output unit;
as shown in fig. 1, 4, 6-7, a pedal force transmission lever 7; the pedal force transmission rod 7 includes a front section 71 and a rear section 72 that are coaxially arranged; one end of the front section 71 is connected with the output end of the pedal force input unit 1, the other end of the front section 71 is provided with a spherical chuck 711, and one end of the rear section 72 is provided with a claw-shaped clamping groove 721 for tightly holding the spherical chuck 711; the front section 71 and the rear section 72 are clamped with each other through a spherical clamp head 711 and a claw-shaped clamping groove 721; the front section 71 and the rear section 72 can be disengaged at the snap-in position under the external force resistance only during automatic emergency braking.
As shown in fig. 1, the other end of the rear section 72 is embedded (or sleeved in other embodiments) with a pedal elastic element 35, the pedal elastic element 35 may be made of elastic rubber, or other elastic elements, such as a spring, a disc spring, etc., may be used; in the rest state of the mechanism, there is an axial idle stroke (i.e. a gap) between the pedal spring element 35 and the input of the brake force output unit, which in the initial state is smaller or larger than the desired magnitude in the braking state; the outer side wall of the rear section 72 is fixedly connected with a pedal force transmission plate 8; an anti-rotation triggering post 10 is arranged on the pedal force transmission plate 8.
4. Support and guide unit
The support and guide unit serves to support the pedal force transmission unit and the electric power transmission unit within the intermediate case 26 and ensure that the pedal force transmission unit and the electric power transmission unit can move only in the axial direction;
the supporting and guiding unit comprises a bracket assembly, a guide rail assembly and a bearing assembly;
as shown in fig. 3 to 6, the bracket assembly includes a pedal force bracket 13, a pedal force guide member 15, an electric power bracket 12, an electric power guide member 14; the guide rail assembly is two guide rails 262 which are parallel to each other and have C-shaped sections; the pedal force bracket 13 comprises a pedal push rod 6 and two pedal force bracket arms 130 connected with the pedal push rod 6; the pedal force guide member 15 is provided at the end of the pedal force bracket arm 130; the electric power bracket 12 comprises an electric push rod 5 and two electric power bracket arms 120 connected with the electric push rod 5; the electrodynamic guide element 14 is arranged at the end of the electrodynamic carrier arm 120; the pedal push rod 6 and the electric push rod 5 are both of a cylindrical structure with two open ends, the pedal push rod 6 is embedded in the electric push rod 5, and the pedal force bracket arm 130 is closer to a force output element relative to the electric power bracket arm 120; the pedal force bracket arm 130 is connected with the guide rail 262 in a sliding way through the pedal force guide element 15, and the pedal force guide element 15 is matched with the outer wall of the guide rail 262 to realize external guide; the electrodynamic support arm 120 is connected with the guide rail 262 in a sliding way through the electrodynamic guide element 14, and the electrodynamic guide element 14 is matched with the inner wall of the guide rail 262 to realize inner guide; the front section 71 and a part of the rear section 72 of the pedal force transmission rod 7 are positioned in the pedal push rod 6; the pedal force support arm 130 is provided with a first guide hole 131, the electric power support arm 120 is provided with a second guide hole 121 at a corresponding position, and the anti-rotation triggering column 10 on the pedal force transfer plate 8 sequentially penetrates through the first guide hole 131 and the second guide hole 121.
As shown in fig. 8 and 9, an elastic attachment 122 is further disposed at the connection between the electric power bracket arm 120 and the pedal force transmission plate; a first carrier 101 and a second carrier 102 are arranged on the side wall of the anti-rotation triggering column 10, and the axial length of the first carrier 101 is greater than that of the second carrier 102; the first carrier 101 is positioned in correspondence with the elastic appendage 122 for pressing said elastic appendage 122 in deformation when the brake pedal is blocked; the second carrier 102 is used to establish contact with the stop surfaces of the electrical power bracket 12 to prevent excessive deformation of the resilient appendage 122.
As shown in fig. 1, the bearing assembly includes a bearing 24 and a bearing bush 21 provided on a bottom case 23 for supporting the gear box 4.
5. Electric power transmission unit
The electric power transmission unit is used for transmitting electric power to the power output unit;
as shown in fig. 1 and 7, the electric power transmission unit comprises a transmission gear nut 4, an external thread 51 arranged on the outer wall of the electric push rod 5, an assistance push piece 17 and an electric elastic element 18;
the transmission gear nut 4 comprises a nut 41 with internal threads and a transmission gear 42 which is sleeved outside the nut 41 and fixedly connected with the nut;
the screw 41 is arranged outside the electric push rod 5, and the screw is in thread fit transmission: when the transmission gear nut 4 rotates, the rotary motion of the transmission gear nut can be converted into the axial translation motion of the electric push rod 5 through the thread fit, and the transmission gear nut 4 is supported and limited by the bearing 24 and cannot axially translate.
The boosting push piece 17 is arranged between the pedal force bracket 13 and the braking force output unit; as shown in fig. 1 and 10, the boosting push member 17 is bowl-shaped as a whole, and one end thereof is connected to the pedal force bracket arm 130 of the pedal force bracket 13, and the other end thereof is in contact with the braking force output unit; the middle part of the boosting part 17 is also provided with a through hole 171 for the pedal elastic element 35 to pass through;
the electrodynamic elastic element 18 is arranged between the pedal force bracket 13 and the electrodynamic bracket 12; the electrically-operated elastic member 18 may be made of elastic rubber, and other elastic members such as a spring, a disc spring, etc. may be used.
The electromotive force can be transmitted to the force output unit sequentially through the transmission gear 42, the nut 41, the external thread 51, the electromotive force bracket 12, the electromotive elastic element 18, the pedal force bracket 13, and the assist pusher 17.
As shown in fig. 10, the boosting part 17 is further provided with four guide structures 173 having sector-shaped cross sections, and the shape enclosed by the outer walls of the four guide structures 173 matches the shape of the outer side wall of the pedal force transmission plate 8, so that the pedal force transmission plate 8 can perform an axial rotation-proof motion along the guide structures 173 of the boosting part 17.
The sensor fixing frame 39 is arranged on the side of the boosting push piece 17, and four buckles 172 are symmetrically arranged on the bottom edge of the boosting push piece 17 so as to connect the boosting push piece 17 with the pedal force support 13.
6. Reset unit
As shown in fig. 1 and 2, the return unit includes a pedal force return spring 11 and an electric power bracket return spring 33 for returning the electric power bracket 12; the pedal force return spring 11 is used for returning the pedal force transmission rod 7; the electromotive force bracket return spring 33 is disposed in the C-shaped groove of the guide rail 262 with one end contacting the upper cover 27 and the other end contacting the electromotive force guide member 14, thereby serving only for the return of the electromotive force bracket 12, in which the driver is labor-saving in manual braking when the electromotive force generating unit malfunctions; the pedal force return spring 11 is disposed outside the rear section 72 of the pedal force transmission rod 7 and between the assist pusher 17 and the pedal force transmission plate 8.
7. Electromotive force generation unit
The electric power generating unit is used for generating electric power related to pedal force;
as shown in fig. 7 and 10, the electromotive force generating unit includes an induction magnet 36, a hall sensor 38; a control unit (not shown in the figure), a motor 31, a motor output gear 2 and an intermediate gear set 3;
the induction magnet 36 is arranged on the pedal force transmission plate 8, the Hall sensor 38 is arranged on the boosting push piece 17, the positions of the induction magnet and the Hall sensor correspond to each other, and the induction magnet and the Hall sensor are matched with each other to monitor the relative displacement generated between the pedal force transmission plate 8 and the pedal force support 13 and/or the electric power support 12 and transmit the relative displacement to the control unit;
the control unit controls the motor 31 to operate and generate electric power according to the relative displacement;
the electric power generated by the motor 31 is output to the transmission gear nut 4 through the motor output gear 2 and the intermediate gear set 3 in sequence.
8. Braking force output unit
The braking force output unit is used for loading the pedal force output by the pedal force input unit and/or the electric power output by the electric power generation unit on a brake master cylinder;
as shown in fig. 1, the braking force output unit includes a force output element a19 and a force output element B20 axially connected.
The principle and operation of the present embodiment are described below in conjunction with fig. 1, 12-15:
during braking, the pedal force input rod 1 is translated in the braking direction under the action of the pedal force applied by the driver, so that the front section 71 of the pedal force transmission rod 7, the rear section 72 of the pedal force transmission rod 7, the pedal force transmission plate 8 and the pedal elastic element 35 are pushed to move together in the braking direction, and as the pedal force increases, the pedal elastic element 35 contacts the bottom of the braking force output element a19 and is compressed, and meanwhile, the pedal force is transmitted to the braking force output element a19 through the pedal elastic element 35;
following this, the pedal force transmitting plate 8 translates to generate a relative displacement between the magnet 36 and the hall sensor 38, the hall sensor 38 detects the relative displacement and transmits the relative displacement to a control unit (usually ECU) in the electromotive force generating unit, the control unit receives the displacement signal and then controls the motor 31 to start, and forward/backward rotates along with the forward/backward movement of the pedal force input rod 1, and the motor 31 operates to drive the motor output gear 2 to rotate, thereby driving the intermediate gear set 3 to rotate, further the intermediate gear set 3 drives the transmission gear nut 4 to rotate, so that the electric push rod 5 translates axially, the electric push rod 5 translates to drive the electromotive force bracket 12, the electric elastic element 18, the pedal force bracket 13, and the power push member 17 to translate together, and finally the pedal force and the resultant force are transmitted to the braking force output element a19 through the power push member 17, the braking force output element A19 and the braking force output element B20 are pushed to move forwards, and then the piston in the master cylinder 28 is pushed to move forwards, so that the braking action is carried out;
when the magnet 36 and the hall sensor 38 keep unchanged relative displacement, the ECU controls the motor 31 to stop running, and keeps the torque in the original braking state;
in the process of keeping braking, the motor 31 is in a torque keeping state, so that the motor output gear 2 is locked to achieve the braking state required by the pedal;
when braking is abandoned, the pedal force input rod 1 loses pedal force from the outside, the pedal force return spring 11 drives the pedal force transmission plate 8, the rear section 72 of the pedal force transmission rod 7, the front section 71 of the pedal force transmission rod 7 and the pedal force input rod 1 to return in sequence, and the master cylinder 28 also returns accordingly. The resetting of the pedal force transmission plate 8 causes the relative displacement between the induction magnet 36 and the hall sensor 38, the hall sensor 38 detects the relative displacement and transmits a displacement signal to a control unit (usually ECU) in the electromotive force generation unit, and the control unit controls the motor 31 to rotate reversely after receiving the displacement signal, so that the electric push rod 5, the electromotive force bracket 12 and the pedal force bracket 13 are reset.
Under normal braking, the ball clamp 711 on the front section 71 of the pedal force transmission rod 7 is tightly wrapped by the claw-shaped slot 721 on the rear section 72;
during automatic emergency braking, if a vehicle brake pedal is blocked by an obstacle, when an active radar of the vehicle detects that a front obstacle is within a braking threshold value, a braking signal is sent to a control unit in an electric power generation unit, the control unit drives a motor 31 to operate to generate electric power after receiving the braking signal, at this time, the movement of a pedal force input rod 1, a front section 71 of a pedal force transmission rod 7, a rear section 72 of the pedal force transmission rod 7, a pedal force transmission plate 8 and an anti-rotation triggering column 10 fixed on the pedal force transmission plate 8 is limited due to the obstacle, at this time, besides the force applied by a pedal force return spring 11, the blocking object applies a force opposite to the braking direction to the pedal force input rod 1, which results in that: the spherical dop 711 of footboard power transmission pole 7 anterior segment 71 breaks away from the parcel of claw type draw-in groove 721 of back end 72 for anterior segment 71 and the back end 72 separation of footboard power transmission pole 7, anterior segment 71 stops to continue to move along the braking force direction, thereby make brake pedal loosen, reach the purpose that prevents to press from both sides wounded driver foot, back end 72 still can continue the translation under the effect of electric power, can not hinder electric power transmission unit and carry out the braking action on transmitting electric power to braking force output unit.
At the same time, the pedal force transmission plate 8 and the rotation-prevention triggering column 10 press the elastic attachment 122 on the electrodynamic support arm 120 to deform it by means of the first carrier 101, whereby the distance between the second carrier 102 and the upper surface of the electrodynamic support 12 is reduced to less than or equal to the threshold distance of the retardation event, the hall sensor 38 is able to recognize this relative displacement, and the control unit records the fault code of the retardation event, providing an information source for accident tracing.
Example two:
the present embodiment is different from the first embodiment only in that:
the pedal elastic member 35 includes a first elastic body and a second elastic body that are sequentially arranged in the braking force transmission direction, and the elastic coefficients of the first elastic body and the second elastic body are different.
In the rest state of the mechanism of the present embodiment, the pedal elastic member 35 is in contact with the braking force output member a19, and there is no gap therebetween, that is, there is no idle stroke, and there is only an axial micro-force stroke. The axial micro-force stroke is smaller or larger than the desired magnitude in the braking state in the initial state.
Example three:
the present embodiment is different from the first embodiment only in that: the electromotive force bracket 12 and the pedal force bracket 13 do not share a guide rail, but have respective guide rails, that is, the guide rail assembly includes an electromotive force guide rail and a pedal force guide rail; the electrodynamic force support 12 is connected with the electrodynamic force guide rail in a sliding way through an electrodynamic force guide element 14; the pedal force bracket 13 is connected with the pedal force guide rail in a sliding way through a pedal force guide element 15; an electric power return spring for returning the electric power bracket 12 may be provided only on the electric power rail; an electric power return spring for returning the electric power support 12 may be provided on the electric power rail, while a pedal force support return spring for returning the pedal force support may be provided on the pedal force rail.
Example four:
the present embodiment is different from the first embodiment only in that: the absence of the electric power support return spring 33 in the guide rail 262, i.e. without the need to return the electric power support 12, is only suitable for the case where the return force of the piston return spring of the master cylinder 28 itself is sufficient to return the electric power support 12 and the pedal force support 13.
Example five:
the present embodiment is different from the third embodiment only in that: without the provision of the electric power bracket return spring and the pedal force bracket return spring, this solution is only suitable for applications where the return force of the piston return spring of the master cylinder 28 itself is sufficient to return the electric power bracket 12 and the pedal force bracket 13.
Example six:
the present embodiment is different from the first embodiment only in that: the electric elastic element 18 is provided in the assist pusher 17 between the pedal elastic element 35 and the braking force output element a19, as shown in fig. 16.
Example seven:
the present embodiment is different from the first embodiment only in that: the pedal force input rod 1 is provided with a limiting protrusion, the pedal force return spring 11 is arranged between the limiting protrusion of the pedal force input rod 1 and the pedal push rod 6, one end of the pedal force return spring 11 is in contact with the limiting protrusion on the pedal force input rod 1, the other end of the pedal force return spring 11 is in contact with the pedal push rod 6, and the pedal force return spring 11 is mainly used for pushing the pedal force input rod 1 and the pedal force transmission rod 7 to reset, as shown in fig. 17.
Example eight:
the present embodiment is different from the sixth embodiment only in that the electric element 18 is an integral annular structure, or a split structure composed of a plurality of elastic bodies uniformly distributed along the circumference; under the action of the pedal force, the pedal elastic element 35 can pass through the electroelastic element 18 and transmit the braking force to the braking force output unit.
Claims (10)
1. An automatic emergency brake booster for a vehicle,
comprises a pedal force input unit, a pedal force transmission unit, an electric power transmission unit, a braking force output unit and a supporting and guiding unit;
the pedal force transmission unit comprises a pedal force transmission rod (7) and a pedal force transmission plate (8) arranged on the pedal force transmission rod (7);
the supporting and guiding unit comprises a bracket assembly and a guide rail assembly;
the braking force output unit is capable of receiving pedal force from the pedal force transmission unit and/or electric power from the electric power transmission unit and transmitting the pedal force and/or the electric power to a brake master cylinder of the vehicle;
the method is characterized in that:
the bracket assembly comprises a pedal force bracket (13) and an electric power bracket (12);
the pedal force bracket (13) comprises a pedal push rod (6) and at least one pedal force bracket arm (130) connected with the pedal push rod (6); the electric power bracket (12) comprises an electric push rod (5) and at least one electric power bracket arm (120) connected with the electric push rod (5); the pedal push rod (6) and the electric push rod (5) are both of a cylindrical structure with openings at two ends, and the pedal push rod (6) is axially embedded in the electric push rod (5) and can relatively slide along the axial direction;
the end of the pedal force bracket arm (130) is in sliding connection with the guide rail assembly;
the end of the electric power support arm (120) is in sliding connection with the guide rail assembly;
the pedal force transmission rod (7) is arranged in the pedal push rod (6);
a first guide hole (131) is formed in the pedal force support arm (130), and a second guide hole (121) is formed in the electric power support arm (120);
the pedal force transfer plate (8) is arranged on the outer side wall of the pedal force transfer rod (7), and the pedal force transfer plate (8) is provided with an anti-rotation triggering column (10); the anti-rotation triggering column (10) sequentially penetrates through the first guide hole (131) and the second guide hole (121);
the end part of the pedal force transmission rod (7) close to the braking force output unit is provided with a pedal elastic element (35); an electric following stroke is formed between the pedal elastic element (35) and the braking force output unit; the electric following stroke is an idle stroke or a micro-force stroke.
2. A vehicle automatic emergency brake booster as set forth in claim 1, wherein: the electric following stroke is fixed and unchangeable when the vehicle is not braked and is actively braked; during the power-assisted braking process, the electric follow-up stroke is changed.
3. A vehicle automatic emergency brake booster as set forth in claim 2, wherein:
the track assembly comprises a pedal force track and an electric power track;
the pedal force guide rail is an inner and/or outer guide structure;
the electric power guide rail is an inner and/or outer guide structure;
the end part of the pedal force bracket arm (130) is provided with a pedal force guide element (15) which is connected with the pedal force guide rail in a sliding way through the pedal force guide element (15);
the end part of the electrodynamic support arm (120) is provided with an electrodynamic guiding element (14) which is connected with the electrodynamic guide rail in a sliding way through the electrodynamic guiding element (14).
4. A vehicle automatic emergency brake booster as set forth in claim 2, wherein:
the guide rail assembly comprises a guide rail (262), and the guide rail (262) is an inner and/or outer guide structure;
the end part of the pedal force bracket arm (130) is provided with a pedal force guide element (15), and the pedal force guide element (15) is in sliding connection with the guide rail (262);
the end part of the electrodynamic support arm (120) is provided with an electrodynamic guiding element (14) which is connected with the guide rail (262) in a sliding way through the electrodynamic guiding element (14).
5. A vehicle automatic emergency brake booster according to any one of claims 1 to 4, wherein:
the electric power transmission unit comprises a transmission gear nut (4), an external thread (51) arranged on the outer wall of the electric push rod (5), an assistance push piece (17) and an electric elastic element (18);
the transmission gear nut (4) is composed of a screw nut (41) with internal threads and a transmission gear (42) with external gear teeth, the transmission gear (42) is arranged outside the screw nut (41), the screw nut (41) is sleeved outside the electric push rod (5) and is connected with the external threads (51) through the internal threads to drive the electric push rod (5) to move along the axial direction;
the power-assisted pushing piece (17) is arranged between the pedal force bracket (13) and the braking force output unit; the boosting push piece (17) is integrally bowl-shaped, one end of the boosting push piece is connected with a pedal force support arm (130) of the pedal force support (13), and the other end of the boosting push piece is contacted with the braking force output unit; the bottom of the power-assisted pushing piece (17) is provided with a through hole (171) for the pedal elastic element (35) to pass through;
the electric elastic element (18) is arranged outside the pedal push rod (6) and is positioned between the pedal force bracket (13) and the electric power bracket (12);
the electric elastic element (18) is of an integrated annular structure or a split structure consisting of a plurality of elastic bodies which are uniformly distributed along the circumference.
6. A vehicle automatic emergency brake booster according to any one of claims 1 to 4, wherein:
the electric power transmission unit comprises a transmission gear nut (4) with internal threads and external transmission teeth, external threads (51) arranged on the outer wall of the electric push rod (5), an assistance pushing piece (17) and an electric elastic element (18);
the transmission gear nut (4) is sleeved outside the electric push rod (5) and is connected with the external thread (51) through the internal thread to drive the electric push rod (5) to move along the axial direction;
the power-assisted pushing piece (17) is arranged between the pedal force bracket (13) and the braking force output unit; the boosting push piece (17) is integrally bowl-shaped, one end of the boosting push piece is connected with a pedal force support arm (130) of the pedal force support (13), and the other end of the boosting push piece is contacted with the braking force output unit; the bottom of the power-assisted pushing piece (17) is provided with a through hole (171) for the pedal elastic element (35) to pass through;
the electric elastic element (18) is arranged in the boosting push piece (17) and is positioned between the pedal elastic element (35) and the braking force output unit;
the electric elastic element (18) is of an integrated annular structure or a split structure consisting of a plurality of elastic bodies which are uniformly distributed along the circumference;
under the action of pedal force and/or electric force, the pedal elastic element (35) can pass through the electric elastic element (18) to transmit the braking force to the braking force output unit.
7. A vehicle automatic emergency brake booster as set forth in claim 5, wherein:
the elastic coefficients of the pedal elastic element (35) and the electric elastic element (18) can be the same or different.
8. A vehicle automatic emergency brake booster as set forth in claim 6, wherein:
the elastic coefficients of the pedal elastic element (35) and the electric elastic element (18) can be the same or different.
9. A vehicle automatic emergency brake booster according to any one of claims 1 to 4, wherein: the pedal elastic element (35) comprises a first elastic body and a second elastic body which are sequentially arranged along the transmission direction of the braking force, one end of the second elastic body is connected with the first elastic body, and the other end of the second elastic body is contacted with the braking force output unit; the elastic coefficients of the first elastic body and the second elastic body are different.
10. A vehicle automatic emergency brake booster according to any one of claims 1 to 4, wherein: the electromotive force is generated by an electric motor; alternatively, the electrical force is generated by a pneumatic, hydraulic, electro-mechanical or electro-thermal force generating mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922434704.0U CN211617653U (en) | 2019-12-30 | 2019-12-30 | Automatic emergency brake booster for vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922434704.0U CN211617653U (en) | 2019-12-30 | 2019-12-30 | Automatic emergency brake booster for vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211617653U true CN211617653U (en) | 2020-10-02 |
Family
ID=72633636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922434704.0U Active CN211617653U (en) | 2019-12-30 | 2019-12-30 | Automatic emergency brake booster for vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211617653U (en) |
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2019
- 2019-12-30 CN CN201922434704.0U patent/CN211617653U/en active Active
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: An automatic emergency brake booster for vehicle Effective date of registration: 20210622 Granted publication date: 20201002 Pledgee: Bank of Xi'an Limited by Share Ltd. South Main Street subbranch Pledgor: SHAANXI GUOLI INFORMATION TECHNOLOGY Co.,Ltd. Registration number: Y2021610000157 |
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Date of cancellation: 20220613 Granted publication date: 20201002 Pledgee: Bank of Xi'an Limited by Share Ltd. South Main Street subbranch Pledgor: SHAANXI GUOLI INFORMATION TECHNOLOGY Co.,Ltd. Registration number: Y2021610000157 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: An automatic emergency brake booster for vehicles Effective date of registration: 20220621 Granted publication date: 20201002 Pledgee: Bank of Xi'an Limited by Share Ltd. South Main Street subbranch Pledgor: SHAANXI GUOLI INFORMATION TECHNOLOGY Co.,Ltd. Registration number: Y2022610000323 |
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Date of cancellation: 20230626 Granted publication date: 20201002 Pledgee: Bank of Xi'an Limited by Share Ltd. South Main Street subbranch Pledgor: SHAANXI GUOLI INFORMATION TECHNOLOGY Co.,Ltd. Registration number: Y2022610000323 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right |