CN106627549B - Electric booster brake device - Google Patents
Electric booster brake device Download PDFInfo
- Publication number
- CN106627549B CN106627549B CN201611085450.0A CN201611085450A CN106627549B CN 106627549 B CN106627549 B CN 106627549B CN 201611085450 A CN201611085450 A CN 201611085450A CN 106627549 B CN106627549 B CN 106627549B
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- assembly
- sliding sleeve
- brake pump
- assisted
- pedal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/74—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
- B60T13/745—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive acting on a hydraulic system, e.g. a master cylinder
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T7/00—Brake-action initiating means
- B60T7/02—Brake-action initiating means for personal initiation
- B60T7/04—Brake-action initiating means for personal initiation foot actuated
- B60T7/06—Disposition of pedal
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Braking Elements And Transmission Devices (AREA)
- Braking Systems And Boosters (AREA)
Abstract
The invention discloses an electric power-assisted brake device which comprises a power-assisted cylinder body, a pedal rod assembly, a pedal rod return spring, an electric power-assisted device and a brake pump assembly, wherein a brake pump ejector rod used for receiving brake force is arranged on the brake pump assembly, the electric power-assisted device comprises an electric power assembly and a power-assisted sliding sleeve which is arranged in the power-assisted cylinder body in a sliding mode and provides sliding driving force by the electric power assembly, the power-assisted sliding sleeve is in pushing fit with the brake pump ejector rod, the pedal rod return spring is arranged in an axial through hole and is in elastic resetting connection with the head end of the pedal rod assembly, and the head end of the pedal rod assembly sequentially penetrates through a positioning pin through hole and the outer end part of the axial through hole in the power-assisted sliding sleeve in the axial direction of the brake pump ejector rod and pushes and acts on the brake pump ejector rod. The invention has the advantages of reasonable structure arrangement and mutual decoupling of the pedal lever braking force and the electric power-assisted braking force.
Description
Technical Field
The invention relates to a vehicle accessory brake component, in particular to an electric power-assisted brake device which can be used in the fields of electric automobiles, hybrid electric automobiles, unmanned automobiles or intelligent driving automobiles and the like.
Background
The conventional braking system of the internal combustion engine automobile mostly adopts a vacuum boosting device to assist a driver to generate enough braking force, and a vacuum source is from an engine or a mechanical vacuum pump. For new energy vehicles (fuel cell vehicles and pure electric vehicles), an engine is not provided for providing a vacuum power source to provide braking assistance, and the braking force generated by manpower alone cannot meet the requirement of service braking. The electric power-assisted brake device can well meet the requirement.
In recent years, similar electrohydraulic brake systems have been developed by various automobile and component manufacturers. Through search, german bosch company introduced a completely new electro-hydraulic brake system on the basis of the ESP HEV brake system, see chinese patent publication No. CN103818371A. The structure of the electronic hydraulic brake system comprises a pedal simulator, an electric booster, a brake pump assembly and other mechanisms, but the electronic hydraulic brake system has the following problems:
the pedal simulator and the electric booster are not decoupled, namely the driving force of the pedal rod of the pedal simulator is coupled with the driving force of the electric booster and acts on a brake pump ejector rod of the brake pump assembly. When the motor of the electric booster or a mechanism of the motor output transmission breaks down, the boosting of the electric booster fails, and a driver can drive a brake pump ejector rod of the brake pump assembly to brake only by a pedal rod mode of a pedal simulator. The pedal force of the driver needs to drive the motor of the electric booster and other mechanisms to rotate simultaneously, and the motor of the electric booster is set to have a high transmission output ratio in order to realize a high boosting effect, and the motor is reversely driven by the pedal force of the driver, so that the motor is difficult to reversely drive.
Disclosure of Invention
The invention aims to overcome the defects and shortcomings of the prior art and provide the electric power-assisted brake device which is reasonable in structural arrangement and mutually decouples pedal rod braking force and electric power-assisted braking force.
In order to achieve the purpose, the invention adopts the technical scheme that the brake booster comprises a booster cylinder body, a pedal rod assembly, a pedal rod return spring, an electric booster and a brake pump assembly, wherein a brake pump ejector rod for receiving braking force is arranged on the brake pump assembly, the electric booster comprises an electric power assembly and a booster sliding sleeve which is arranged in the booster cylinder body in a sliding manner and provides sliding driving force by the electric power assembly, the booster sliding sleeve is matched with the brake pump ejector rod in a pushing manner,
the boosting sliding sleeve is internally provided with an axial through hole, a guide notch is formed in the outer wall of the boosting sliding sleeve, the pedal rod assembly is arranged in the axial through hole in the boosting sliding sleeve in a sliding mode, the pedal rod reset spring is arranged in the axial through hole and is connected with the head end of the pedal rod assembly in an elastic reset mode, the boosting cylinder body is further fixedly provided with a reset spring positioning pin inserted into the axial through hole through the guide notch, the outer end of the pedal rod reset spring is supported on the reset spring positioning pin in an elastic limiting mode, the boosting sliding sleeve is matched with the reset spring positioning pin in an axial sliding mode through the guide notch of the boosting sliding sleeve, the reset spring positioning pin is provided with a positioning pin through hole through which the head end of the pedal rod assembly can axially penetrate, and the head end of the pedal rod assembly sequentially penetrates through the positioning pin through hole and the outer end of the axial through hole in the boosting sliding sleeve in the axial direction of the brake pump ejector rod and pushes the outer end of the brake pump ejector rod to act on the brake pump ejector rod.
Through the arrangement, the transmission process of the brake pump ejector rod acted by the pedal rod assembly and the transmission process of the electric booster acted on the brake pump ejector rod through the boosting sliding sleeve are decoupled from each other, and in the structural arrangement, so that when the electric booster brakes, the electric booster firstly applies braking force to the brake pump ejector rod through the boosting sliding sleeve and pushes the brake pump ejector rod to do piston motion, so that the brake pump assembly outputs brake pressure oil to rotate, once the electric booster fails, the head end of the pedal rod assembly sequentially penetrates through the positioning pin through hole and the outer end part of the axial through hole in the boosting sliding sleeve and pushes the pedal rod to act on the brake pump ejector rod, so that pedal braking is carried out, and because the pedal braking and the electric boosting braking are decoupled from each other, the pedal braking force is fast in response, the braking force requirement is low, and the safety of vehicle braking is improved.
The electric power assembly comprises a motor and a speed reducer with small tooth difference and linked with an output shaft of the motor. Through the arrangement, the speed reducer with small tooth difference is preferably used for carrying out power speed reduction output, and the speed reducer can obtain larger output transmission ratio. And because the decoupling setting of this application, can set up the little poor speed reducer of tooth of this kind of big output drive ratio, carry out braking power output, need not to consider because of its electronic helping hand trouble pedal lever assembly can't carry out the problem of pedal brake.
The output shaft of the speed reducer with less tooth difference is provided with a gear shaft in a linkage manner, one side of the outer wall of the power-assisted sliding sleeve is provided with a transmission rack in transmission connection with the gear shaft, the other side, opposite to the side where the transmission rack is located, of the outer wall of the power-assisted sliding sleeve is provided with a smooth guide surface, a roller is arranged in the power-assisted cylinder body in a rotating manner, and the roller is in rolling connection and matching with the smooth guide surface of the power-assisted sliding sleeve.
Through this setting, few tooth difference gear reducer only need drive the helping hand sliding sleeve through the gear shaft, and the opposite side is rolled by the roller bearing and is supported, compares in two gear shaft drive structures of prior art, and is low to the assembly precision requirement, and transmission stability is good to the processing cost has been reduced.
The pedal lever reset spring is a variable stiffness spring, and the stiffness coefficient of the variable stiffness spring is gradually and gradually increased from one end of the pedal lever reset spring corresponding to the pedal lever assembly to one end of the reset spring positioning pin corresponding to the pedal lever assembly. Through this setting, the foot bar reset spring is when the foot bar assembly is pedal for provide the simulation feedback power of pedal brake for the driver, and become stiffness spring through this setting, can provide pedal feedback power better, simulate the degree of reality of traditional car pedal brake.
The pedal rod reset spring is characterized in that a spring sleeve is arranged on one side of the pedal rod reset spring corresponding to the reset spring positioning pin, the outer end of the spring sleeve is limited and supported and positioned at the inner end of the reset spring positioning pin, and the center of the spring sleeve is provided with a spring sleeve center hole for the head end of the pedal rod assembly to penetrate through. Through this setting, conveniently fix a position and support the outer end of foot bar reset spring, structural design is reasonable.
The brake pump assembly comprises a two-stage parallel hydraulic cylinder, and a brake pump ejector rod is arranged at the input end of the two-stage parallel hydraulic cylinder in a driving mode.
The brake pump ejector rod input linkage plate is arranged at the input end of the brake pump ejector rod in a linkage mode, the axial outer end face of the power-assisted sliding sleeve is supported on the brake pump ejector rod input linkage plate in a pushing mode, and a buffer cushion block matched with the head end of the pedal rod assembly in a pushing mode is fixedly arranged at the center of the brake pump ejector rod input linkage plate. Through this setting for the transmission structure that the helping hand sliding sleeve acted on the brake pump ejector pin and the head end of footboard assembly acted on the brake pump ejector pin arranges each other not to be disturbed, and is rationally distributed, and the transmission is stable.
The pedal rod assembly comprises a pedal rod, a pedal rod linkage sleeve and a pedal rod sleeve, the pedal rod linkage sleeve is fixedly arranged in the input end of the pedal rod sleeve, the pedal rod is fixedly inserted into the pedal rod linkage sleeve, and the outer wall of the pedal rod sleeve is sleeved with a damping sleeve matched with the power-assisted sliding sleeve in a sliding mode through an axial through hole. Through this setting for the gliding of foot bar assembly in helping hand sliding sleeve has better damping force, improves pedal feedback force response.
In conclusion, the invention has the advantages that: the structure design is reasonable, the transmission is stable and reliable, the pedal lever braking force and the electric power-assisted braking force are decoupled with each other, the braking response of the pedal braking force is fast, the braking force requirement is low, and the safety of vehicle braking is improved.
The invention is further described with reference to the drawings and the detailed description.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 isbase:Sub>A cross-sectional view A-A of FIG. 1;
FIG. 3 is a cross-sectional view B-B of FIG. 1;
FIG. 4 is a side view of the power slide;
FIG. 5 is a top view of the power slide;
FIG. 6 is a partial schematic view of the present invention;
FIG. 7 is an exploded view of FIG. 6;
fig. 8 is an exploded sectional view of fig. 6.
Detailed Description
The present invention is described in detail below by way of examples, which are intended to be illustrative only and are not to be construed as limiting the scope of the invention, as numerous insubstantial modifications and variations of the invention are possible in light of the above teachings.
The embodiment of the invention shown in fig. 1-8 comprises a booster cylinder 1, a pedal rod assembly 2, a pedal rod return spring 3, an electric booster 4 and a brake pump assembly 5, the brake pump assembly 5 is provided with a brake pump mandril 51 for receiving brake force, the electric booster 4 comprises an electric power assembly and a boosting sliding sleeve 41 which is arranged in the boosting cylinder body 1 in a sliding way and provides sliding driving force by the electric power assembly, the electric power assembly comprises a motor 42 and a small tooth difference speed reducer 43 which is linked with an output shaft of the motor, the small tooth difference speed reducer 43 is a mature gear transmission mechanism in the field, and details are not repeated in the embodiment, in addition, the boosting sliding sleeve 41 is matched with the brake pump mandril 51 in a pushing way, an axial through hole 411 is arranged in the boosting sliding sleeve 41, a guide notch 412 is arranged on the outer wall of the boosting sliding sleeve 41, the front end of the pedal lever assembly 2 is arranged in an axial through hole 411 in the power-assisted sliding sleeve 41 in a sliding way, the pedal lever return spring 3 is arranged in the axial through hole 411 and is elastically reset and connected with the head end 21 of the pedal lever assembly 2, the boosting cylinder body 1 is also fixedly provided with a return spring positioning pin 11 inserted into the axial through hole through a guide notch 412, the outer end of the pedal rod reset spring 3 is elastically limited and supported on a reset spring positioning pin 11, the power-assisted sliding sleeve 41 is in axial sliding fit with the return spring positioning pin 11 through the guide notch 412 thereof, the return spring positioning pin 11 is provided with a positioning pin through hole 111 through which the head end of the pedal lever assembly can axially pass, the head end of the pedal rod assembly 2 sequentially passes through the positioning pin through hole 111 and the outer end part of the axial through hole 411 in the power-assisted sliding sleeve 41 in the process of sliding towards the brake pump mandril 51 in the axial direction and pushes and acts on the brake pump mandril 51.
In this embodiment, a gear shaft 44 is arranged on an output shaft of the small tooth difference speed reducer 43 in a linkage manner, a transmission rack 413 in transmission connection with the gear shaft is arranged on one side of an outer wall of the power-assisted sliding sleeve 41, a smooth guide surface 414 is arranged on the other side of the outer wall of the power-assisted sliding sleeve 41 opposite to the transmission rack, a roller 12 is rotatably arranged in the power-assisted cylinder body 1, and the roller 12 is in rolling connection with the smooth guide surface 414 of the power-assisted sliding sleeve.
The pedal lever return spring 3 described in this embodiment is a variable stiffness spring, and the stiffness coefficient of the variable stiffness spring is gradually increased from one end of the pedal lever return spring corresponding to the pedal lever assembly to the corresponding end of the return spring positioning pin.
In addition, a spring sleeve 12 is arranged on one side of the pedal lever return spring 3 corresponding to the return spring positioning pin 11, the outer end of the spring sleeve 12 is limited and supported and positioned at the inner end of the return spring positioning pin 11, and a spring sleeve center hole 121 through which the head end of the pedal lever assembly passes is arranged in the center of the spring sleeve 12.
Preferably, the brake pump assembly 5 of the present embodiment includes a two-stage parallel hydraulic cylinder 52, and the brake pump rod 51 is disposed at an input end of the two-stage parallel hydraulic cylinder. The two-stage parallel hydraulic cylinder 52 is a mature part in the art and will not be described in detail in this embodiment.
In addition, the input end of the brake pump ejector rod 51 is provided with a brake pump ejector rod input linkage plate 53 in a linkage manner, the axial outer end face of the boosting sliding sleeve 41 is supported on the brake pump ejector rod input linkage plate 53 in a pushing manner, and a buffer cushion block 531 which is matched with the head end of the pedal rod assembly in a pushing manner is fixedly arranged at the center of the brake pump ejector rod input linkage plate 53.
In addition, preferably, the pedal lever assembly 2 includes a pedal lever 22, a pedal lever linkage sleeve 23 and a pedal lever sleeve 24, the pedal lever linkage sleeve 23 is fixedly arranged in the input end of the pedal lever sleeve 24, the pedal lever 22 is fixedly inserted into the pedal lever linkage sleeve 23, and a damping sleeve 241 which is in sliding fit with the axial through hole of the power-assisted sliding sleeve is sleeved on the outer wall of the pedal lever sleeve 24.
Claims (7)
1. The utility model provides an electronic helping hand arresting gear, is including helping hand cylinder body, foot bar assembly, foot bar reset spring, electronic booster and brake pump assembly, brake pump assembly on be provided with the brake pump ejector pin that is used for receiving braking force, electronic booster includes electronic power assembly, slides and sets up in the helping hand cylinder body and provide the helping hand sliding sleeve of the drive power that slides by electronic power assembly, helping hand sliding sleeve and brake pump ejector pin ejection cooperation, its characterized in that:
the boosting sliding sleeve is internally provided with an axial through hole, a guide notch is formed in the outer wall of the boosting sliding sleeve, the pedal rod assembly is arranged in the axial through hole in the boosting sliding sleeve in a sliding mode, the pedal rod reset spring is arranged in the axial through hole and is connected with the head end of the pedal rod assembly in an elastic reset mode, the boosting cylinder body is further fixedly provided with a reset spring positioning pin inserted into the axial through hole through the guide notch, the outer end of the pedal rod reset spring is supported on the reset spring positioning pin in an elastic limiting mode, the boosting sliding sleeve is matched with the reset spring positioning pin in an axial sliding mode through the guide notch of the boosting sliding sleeve, the reset spring positioning pin is provided with a positioning pin through hole through which the head end of the pedal rod assembly can axially penetrate, and the head end of the pedal rod assembly sequentially penetrates through the positioning pin through hole and the outer end of the axial through hole in the boosting sliding sleeve in the axial direction of the brake pump ejector rod and pushes the outer end of the brake pump ejector rod to act on the brake pump ejector rod.
2. An electrically assisted brake apparatus according to claim 1, characterized in that: the electric power assembly comprises a motor and a speed reducer with small tooth difference and linked with an output shaft of the motor.
3. An electrically assisted brake apparatus according to claim 2, characterized in that: the output shaft of the speed reducer with small tooth difference is provided with a gear shaft in a linkage mode, one side of the outer wall of the power-assisted sliding sleeve is provided with a transmission rack in transmission connection with the gear shaft, the other side, opposite to the side where the transmission rack is located, of the outer wall of the power-assisted sliding sleeve is a smooth guide surface, a roller is arranged in the power-assisted cylinder body in a rotating mode, and the roller is matched with the smooth guide surface of the power-assisted sliding sleeve in a rolling connection mode.
4. An electrically assisted brake apparatus according to claim 1, characterized in that: one side of the pedal lever reset spring corresponding to the reset spring positioning pin is provided with a spring sleeve, the outer end of the spring sleeve is limited, supported and positioned at the inner end of the reset spring positioning pin, and the center of the spring sleeve is provided with a spring sleeve center hole for the head end of the pedal lever assembly to penetrate through.
5. An electrically assisted brake apparatus according to claim 1, wherein: the brake pump assembly comprises a two-stage parallel hydraulic cylinder, and a brake pump ejector rod is arranged at the input end of the two-stage parallel hydraulic cylinder in a driving mode.
6. An electrically assisted brake apparatus according to claim 1, characterized in that: the brake pump ejector rod input linkage plate is arranged at the input end of the brake pump ejector rod in a linkage mode, the axial outer end face of the power-assisted sliding sleeve is supported on the brake pump ejector rod input linkage plate in a pushing mode, and a buffering cushion block matched with the head end of the pedal rod assembly in a pushing mode is fixedly arranged at the center of the brake pump ejector rod input linkage plate.
7. An electrically assisted brake apparatus according to claim 1, wherein: the foot bar assembly include foot bar, foot bar linkage cover and foot bar cover, the fixed input that sets up in the foot bar cover of foot bar linkage cover, and the foot bar is fixed to be inserted and to be located in the foot bar linkage cover, the outer wall of foot bar cover on the cover be equipped with the axial through hole of helping hand sliding sleeve complex damping cover that slides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611085450.0A CN106627549B (en) | 2016-11-30 | 2016-11-30 | Electric booster brake device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611085450.0A CN106627549B (en) | 2016-11-30 | 2016-11-30 | Electric booster brake device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106627549A CN106627549A (en) | 2017-05-10 |
| CN106627549B true CN106627549B (en) | 2023-03-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611085450.0A Active CN106627549B (en) | 2016-11-30 | 2016-11-30 | Electric booster brake device |
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| CN (1) | CN106627549B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109204266B (en) * | 2017-06-30 | 2021-02-23 | 比亚迪股份有限公司 | Brake pedal simulator, automobile brake system and vehicle |
| CN109204264B (en) * | 2017-06-30 | 2021-01-19 | 比亚迪股份有限公司 | Brake pedal simulator, automobile brake system and vehicle |
| CN109204270B (en) * | 2017-06-30 | 2021-05-14 | 比亚迪股份有限公司 | Brake pedal simulator, automobile brake system and vehicle |
| CN109204263B (en) * | 2017-06-30 | 2021-01-19 | 比亚迪股份有限公司 | Brake pedal simulator, automobile brake system and vehicle |
| CN109204253B (en) * | 2017-06-30 | 2021-08-10 | 比亚迪股份有限公司 | Brake pedal simulator, automobile brake system and vehicle |
| CN108422990A (en) * | 2018-05-18 | 2018-08-21 | 浙江三星机电股份有限公司 | Electric booster braking device with treadle assembly travel feedback mechanism |
| CN114701468B (en) * | 2022-03-29 | 2023-05-12 | 淄博爱科工矿机械有限公司 | Stall intelligent protection system |
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