CN210478667U - Electronic brake booster and vehicle with same - Google Patents
Electronic brake booster and vehicle with same Download PDFInfo
- Publication number
- CN210478667U CN210478667U CN201921347277.6U CN201921347277U CN210478667U CN 210478667 U CN210478667 U CN 210478667U CN 201921347277 U CN201921347277 U CN 201921347277U CN 210478667 U CN210478667 U CN 210478667U
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- China
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- air spring
- brake booster
- push rod
- cylinder piston
- electronic brake
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Abstract
The utility model discloses an electronic brake booster and vehicle that has it. The electronic brake booster includes: the brake pedal drives the push rod to move; the sensor bracket is provided with a spring mounting groove; the air spring is positioned between the sensor bracket and the main cylinder piston, and the air spring ejector rod is stopped to abut against the main cylinder piston; the feedback disc is positioned between the air spring base and the bottom of the spring mounting groove; and the driving device is used for driving the sensor bracket to move. According to the utility model discloses an electronic brake booster, air spring ejector pin begin to terminate and support the master cylinder piston to be favorable to improving electronic brake booster's NVH performance and life. Compared with the prior art, the air spring replaces a main cylinder ejector rod, a return spring and a spring base, so that the cost of the electronic brake booster is reduced, and the assembly process of the electronic brake booster is simplified.
Description
Technical Field
The utility model relates to an automotive filed particularly, relates to an electronic brake booster and vehicle that has it.
Background
Currently, a force transmission device of an electronic brake booster includes; the shell, the push rod, the sensor support, drive arrangement, the feedback dish, spring base, return spring, the master cylinder ejector pin, the master cylinder piston, wherein spring base sets up on the sensor support, the return spring cover is established in the outside of master cylinder ejector pin, and spring base and shell are connected respectively to return spring's both ends, when the driver depresses the brake pedal, the push rod promotes sensor support and the master cylinder ejector pin of being connected with the sensor support to master cylinder piston motion jointly with drive arrangement's thrust, in order to realize turning into hydraulic pressure force with the linear motion of master cylinder ejector pin, realize the vehicle braking, at this in-process, return spring is compressed, at brake pedal return in-process, return spring's resilience force is used for promoting sensor support and brake pedal return.
The main disadvantages of the prior art electronic brake booster are as follows:
(1) a gap is reserved between the main cylinder ejector rod and the main cylinder piston, when a driver presses a brake pedal, the main cylinder ejector rod moves to the main cylinder piston to generate impact, and the NVH performance and the service life of the electronic brake booster are influenced;
(2) in the case of failure of the driving device, because the force generated by the compression of the return spring acts on the shell, a part of the force provided by the driver for depressing the brake pedal acts on the shell and cannot be converted into the hydraulic braking force required by braking;
(3) the electronic brake booster has more parts and assembly processes.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing an electronic brake booster can improve electronic brake booster's NVH performance and life.
The electronic brake booster includes: the push rod is driven to move by the brake pedal; a sensor bracket having a spring mounting slot; an air spring between the sensor bracket and a master cylinder piston, the air spring comprising: the air spring base is positioned in the spring mounting groove, and the air spring ejector rod is stopped to abut against the master cylinder piston; the feedback disc is positioned between the air spring base and the bottom of the spring mounting groove; the driving device is used for driving the sensor bracket to move, the push rod moves towards the direction of the master cylinder piston under the condition that the brake pedal is pressed down, and the driving device drives the sensor bracket to move towards the master cylinder piston; in the process of returning the brake pedal, the push rod moves in the direction away from the main cylinder piston, and the air spring base pushes the sensor support to return.
According to some embodiments of the utility model, the confession has been seted up on the sensor support the push rod via hole that the push rod passed, works as drive arrangement inefficacy and screw down during brake pedal, the push rod wears to establish push rod via hole and drive the feedback dish to master cylinder piston place direction removes.
According to some embodiments of the present invention, the electronic brake booster further comprises: and the push rod sensor is electrically connected with the driving device and is used for detecting the state of the push rod, and the driving device works under the condition that the push rod sensor detects that the push rod moves towards the master cylinder piston.
According to the utility model discloses a some embodiments, the cell wall of spring mounting groove with be provided with the direction arch on one of them of air spring base, be provided with the direction recess on the other, the direction arch be suitable for with the cooperation of direction recess.
Further, the spring mounting groove is a cylindrical mounting groove, the guide groove is formed in the groove side wall of the spring mounting groove, and the guide protrusion is arranged on the air spring base.
Furthermore, the number of the guide grooves is multiple, and the guide protrusions correspond to the guide grooves one to one.
Further, a plurality of the guide grooves are uniformly arranged in a circumferential direction of the spring mounting groove.
Further, the height of the side wall of the spring mounting groove is larger than the moving distance of the push rod to the direction of the master cylinder piston.
According to some embodiments of the utility model, the diameter of feedback dish is greater than the diameter of air spring ejector pin, the diameter of air spring base is greater than the diameter of air spring ejector pin.
Compared with the prior art, electronic brake booster have following advantage:
according to the utility model discloses an electronic brake booster, air spring ejector pin begin to terminate and support the master cylinder piston to be favorable to improving electronic brake booster's NVH performance and life. Compared with the prior art, the air spring replaces a main cylinder ejector rod, a return spring and a spring base, so that the cost of the electronic brake booster is reduced, and the assembly process of the electronic brake booster is simplified.
Another object of the present invention is to provide a vehicle, including the above electronic brake booster.
Compared with the prior art, the vehicle have the same advantages as the electronic brake booster, and the description is omitted here.
Drawings
The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:
FIG. 1 is a cross-sectional view of an electric brake booster;
FIG. 2 is an exploded view of a portion of an electric brake booster;
FIG. 3 is a perspective view of a sensor holder;
FIG. 4 is a top view of the sensor mount;
fig. 5 is a perspective view of the air spring.
Description of reference numerals:
the air brake booster comprises a shell 1, an air spring 2, an air spring base 21, a guide protrusion 211, an air spring ejector rod 22, a main cylinder piston 3, a push rod 4, a driving device 5, a feedback disc 6, a sensor bracket 7, a spring mounting groove 71, a guide groove 711, a push rod through hole 72 and an electronic brake booster 10.
Detailed Description
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
The electric brake booster 10 of the present invention will be described in detail with reference to fig. 1 to 5 in conjunction with the embodiments.
Referring to fig. 1, an electronic brake booster 10 according to an embodiment of the present invention may include: push rod 4, sensor support 7, air spring 2, feedback dish 6, drive arrangement 5.
The electronic brake booster 10 may further include a housing 1, the housing 1 is fixedly connected to the vehicle body, and the housing 1 is used for protecting and fixing components inside the electronic brake booster 10.
The brake pedal is hinged with the push rod 4, a driver can drive the push rod 4 to move towards the master cylinder piston 3 by pressing down the brake pedal, and the push rod 4 is provided with a magnet which has the same movement with the push rod 4. As shown in fig. 1, the push rod 4 moves horizontally.
Referring to fig. 2 to 4, the sensor bracket 7 has a spring installation groove 71, and the spring installation groove 71 is used to install the air spring 2.
The air spring 2 is located between the sensor bracket 7 and the master cylinder piston 3, and as shown in fig. 5, the air spring 2 includes: the air spring base 21 and the air spring ejector rod 22, compressed air is arranged between the air spring base 21 and the air spring ejector rod 22, the elastic action of the air spring 2 is realized by utilizing the air compressibility, the air spring 2 can buffer the impact force between the air spring ejector rod 22 and the main cylinder piston 3, and can also provide power for the return of the brake pedal and the sensor support 7, the air spring base 21 is positioned in the spring mounting groove 71, and the air spring ejector rod 22 is stopped to abut against the main cylinder piston 3, so that the rigid collision and impact cannot be generated between the air spring 2 and the main cylinder piston 3 in the braking process, and the improvement of the NVH performance and the service life of the electronic brake.
Referring to fig. 1, the feedback disk 6 is located between the air spring base 21 and the bottom of the spring mounting groove 71.
The driving device 5 is used for driving the sensor bracket 7 to move, under the condition that the brake pedal is pressed, the push rod 4 moves towards the direction of the main cylinder piston 3 (namely moves towards the right), the driving device 5 converts the rotary motion of the motor into the linear motion of the sensor bracket 7 through the internal components such as the motor, the gear, the screw rod, the threaded sleeve and the like, so that the driving device 5 provides assistance and drives the sensor bracket 7 to move towards the main cylinder piston 3, the sensor bracket 7 pushes the feedback disc 6 and the air spring 2 to push the main cylinder piston 3, and the main cylinder piston 3 converts the pushing force into hydraulic braking force; in the process of returning the brake pedal, the push rod 4 moves in the direction away from the master cylinder piston 3 (i.e. moves leftwards), and the air spring base 21 pushes the sensor bracket 7 and the brake pedal to return by the resilience force of compressed air in the air spring 2. When the sensor support 7 and the push rod 4 are returned, the sensor support 7 and the push rod 4 move leftwards.
According to the utility model discloses an electronic brake booster 10, air spring ejector pin 22 begins to terminate and supports master cylinder piston 3 to be favorable to improving electronic brake booster 10's NVH performance and life. Compared with the prior art, the air spring 2 replaces a main cylinder ejector rod, a return spring and a spring base, so that the cost of the electronic brake booster 10 is reduced, and the assembly process of the electronic brake booster 10 is simplified.
Referring to fig. 3 and 4, a push rod through hole 72 through which the push rod 4 passes is formed in the sensor bracket 7, when the driving device 5 fails and the brake pedal is depressed, the push rod 4 passes through the push rod through hole 72 and drives the feedback disc 6 to move towards the direction of the master cylinder piston 3, the feedback disc 6 pushes the air spring 2 to enable the master cylinder piston 3 to move rightwards, the master cylinder piston 3 converts the thrust into hydraulic braking force, and when the driving device 5 fails, the push rod through hole 72 enables a driver to depress the brake pedal to perform non-power-assisted emergency braking, so that the safety performance of the vehicle is improved.
It should be noted that, when prior art drive arrangement 5 became invalid, the force that the driver depressed the brake pedal had some to be consumed on overcoming return spring's compressive force, and the utility model discloses an air spring 2 is located between sensor support 7 and the master cylinder piston 3, and air spring 2 also can transmit the force that the driver depressed the brake pedal for master cylinder piston 3 in compression process to be favorable to when drive arrangement 5 became invalid, the more efficient hydraulic braking force that turns into of the force that the driver depressed the brake pedal, and then be favorable to promoting the security of vehicle.
The electronic brake booster 10 further includes a push rod sensor electrically connected to the driving device 5, and the push rod sensor is configured to detect a state of the push rod 4, and the driving device 5 operates when the push rod sensor detects that the push rod 4 moves toward the master cylinder piston 3.
Specifically, when a driver depresses a brake pedal, a magnet on the push rod 4 and a push rod sensor on the sensor support 7 generate relative motion, the push rod sensor can sense the relative position of the magnet, the push rod sensor transmits a sensed signal to the driving device 5 electrically connected with the push rod sensor, and the driving device 5 provides assistance and drives the sensor support 7 to move towards the master cylinder piston 3 so as to realize intelligent assistance.
One of the groove wall of the spring installation groove 71 and the air spring base 21 is provided with a guide protrusion 211, and the other is provided with a guide groove 711, and the guide protrusion 211 is adapted to be fitted with the guide groove 711.
In the embodiment shown in fig. 1 to 5, the spring installation groove 71 is a cylindrical installation groove, the air spring base 21 is installed in the spring installation groove 71, the cylindrical installation groove provides a right linear motion guide for the air spring base 21, the guide groove 711 is disposed on a groove side wall of the spring installation groove 71, the guide protrusion 211 is disposed on the air spring base 21, and the cooperation of the guide groove 711 and the guide protrusion 211 is used for preventing the air spring 2 from rotating along the axis of the spring installation groove 71, so as to improve the stability and reliability of the air spring 2, reduce the friction of the air spring 2 on the master cylinder piston 3, and further facilitate prolonging the service life of the electric brake booster 10.
In other embodiments of the utility model, spring mounting groove 71 is cylindrical mounting groove, air spring base 21 is installed in spring mounting groove 71, cylindrical mounting groove provides the direction of rectilinear motion right for air spring base 21, direction recess 711 sets up on air spring base 21, direction arch 211 sets up on the groove lateral wall of spring mounting groove 71, the cooperation of direction recess 711 and direction arch 211 is used for preventing air spring 2 from rotating, thereby be favorable to improving the stability and the reliability of air spring 2, reduce the friction of air spring 2 to master cylinder piston 3, and then be favorable to promoting electronic brake booster 10's life.
Further, the number of the guide grooves 711 is plural, and the guide protrusions 211 correspond to the guide grooves 711 one to one, so that stress concentration is prevented, and the service lives of the guide grooves 711 and the guide protrusions 211 are prolonged.
Further, the plurality of guide grooves 711 are uniformly arranged along the circumferential direction of the spring installation groove 71, thereby facilitating the assembly of the sensor bracket 7 with the air spring 2 and improving the smoothness of the guide.
Referring to fig. 1 and 2, the height of the groove sidewall of the spring installation groove 71 is greater than the distance that the push rod 4 moves towards the direction of the master cylinder piston 3, so as to ensure that the air spring 2 does not come out of the spring installation groove 71 when the push rod 4 pushes the feedback disc 6 when the driving device 5 fails, thereby being beneficial to improving the reliability of the electronic brake booster 10.
In some embodiments of the present invention, the diameter of the feedback disk 6 is larger than the diameter of the air spring rod 22, and the diameter of the air spring base 21 is larger than the diameter of the air spring rod 22, so that the force for pressing the brake pedal and the assisting force provided by the driving device 5 are more smoothly transmitted to the master cylinder piston 3.
According to another aspect of the present invention, a vehicle includes the electric brake booster 10 of the above embodiment.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An electronic brake booster (10), comprising:
the push rod (4) is driven by a brake pedal to move;
a sensor bracket (7), the sensor bracket (7) having a spring mounting slot (71);
an air spring (2), the air spring (2) being located between the sensor bracket (7) and a master cylinder piston (3), the air spring (2) comprising: the air spring device comprises an air spring base (21) and an air spring ejector rod (22), compressed air is arranged between the air spring base (21) and the air spring ejector rod (22), the air spring base (21) is located in a spring installation groove (71), and the air spring ejector rod (22) always abuts against a master cylinder piston (3);
a feedback disc (6), wherein the feedback disc (6) is positioned between the air spring base (21) and the bottom of the spring mounting groove (71);
a drive device (5), wherein the drive device (5) is used for driving the sensor bracket (7) to move, the push rod (4) moves towards the direction of the master cylinder piston (3) under the condition that the brake pedal is pressed, and the drive device (5) drives the sensor bracket (7) to move towards the master cylinder piston (3); in the process of returning the brake pedal, the push rod (4) moves in the direction away from the main cylinder piston (3), and the air spring base (21) pushes the sensor support (7) to return.
2. The electronic brake booster (10) according to claim 1, wherein the sensor bracket (7) is provided with a push rod through hole (72) for the push rod (4) to pass through, and when the driving device (5) fails and the brake pedal is depressed, the push rod (4) passes through the push rod through hole (72) and drives the feedback disc (6) to move towards the master cylinder piston (3).
3. An electronic brake booster (10) as set forth in claim 1 further including: and the push rod sensor is electrically connected with the driving device (5) and is used for detecting the state of the push rod (4), and the driving device (5) works under the condition that the push rod sensor detects that the push rod (4) moves towards the master cylinder piston (3).
4. An electric brake booster (10) according to claim 1, characterized in that one of the groove wall of the spring mounting groove (71) and the air spring base (21) is provided with a guide protrusion (211) and the other is provided with a guide groove (711), and the guide protrusion (211) is adapted to be fitted with the guide groove (711).
5. An electric brake booster (10) as set forth in claim 4 characterized in that said spring mounting groove (71) is a cylindrical mounting groove, said guide groove (711) is provided on a groove side wall of said spring mounting groove (71), and said guide protrusion (211) is provided on said air spring seat (21).
6. An electric brake booster (10) according to claim 4 or 5, characterized in that the number of the guide grooves (711) is plural, and the guide protrusions (211) correspond to the guide grooves (711) one to one.
7. An electric brake booster (10) according to claim 6, characterized in that a plurality of the guide grooves (711) are uniformly arranged in the circumferential direction of the spring mounting groove (71).
8. The electronic brake booster (10) according to claim 5, wherein the spring mounting groove (71) has a groove side wall height greater than a distance by which the push rod (4) moves in a direction in which the master cylinder piston (3) is located.
9. Electronic brake booster (10) according to claim 1, characterized in that the diameter of the feedback disc (6) is larger than the diameter of the air spring tappet (22), and the diameter of the air spring base (21) is larger than the diameter of the air spring tappet (22).
10. A vehicle, characterized by comprising an electronic brake booster (10) according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921347277.6U CN210478667U (en) | 2019-08-19 | 2019-08-19 | Electronic brake booster and vehicle with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921347277.6U CN210478667U (en) | 2019-08-19 | 2019-08-19 | Electronic brake booster and vehicle with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210478667U true CN210478667U (en) | 2020-05-08 |
Family
ID=70537576
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921347277.6U Active CN210478667U (en) | 2019-08-19 | 2019-08-19 | Electronic brake booster and vehicle with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210478667U (en) |
-
2019
- 2019-08-19 CN CN201921347277.6U patent/CN210478667U/en active Active
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