CN110203188B - Electric power-assisted braking system - Google Patents
Electric power-assisted braking system Download PDFInfo
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- CN110203188B CN110203188B CN201910451789.5A CN201910451789A CN110203188B CN 110203188 B CN110203188 B CN 110203188B CN 201910451789 A CN201910451789 A CN 201910451789A CN 110203188 B CN110203188 B CN 110203188B
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Classifications
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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
- B60T13/10—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 fluid assistance, drive, or release
- B60T13/66—Electrical control in fluid-pressure brake systems
- B60T13/68—Electrical control in fluid-pressure brake systems by electrically-controlled valves
- B60T13/686—Electrical control in fluid-pressure brake systems by electrically-controlled valves in hydraulic systems or parts thereof
-
- 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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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Braking Systems And Boosters (AREA)
Abstract
The invention discloses an electric power-assisted braking system, which comprises a braking main cylinder body and the like, wherein a motor transmits torque to a screw through a gear pair, the screw is internally matched and connected with a screw rod so as to convert the torque transmitted by the gear pair into pushing force to be applied to an output rod at one end of the screw rod, the output rod transmits the pushing force to a braking main cylinder piston at one end so as to generate hydraulic force required by braking, one end of a shifting fork is connected with a pedal to obtain an input intention, the other end of the shifting fork is connected with the input rod so as to transmit the input intention and the input force, a push rod is connected with the input rod, a magnetic body is connected with the push rod so as to reflect the change of input displacement, and a sensor chip is arranged in a sensor so as to output the change of the displacement of the magnetic body. The invention realizes the electric power-assisted braking of the vehicle, and can be matched with the whole vehicle to recover relevant energy without the support of ESC; the whole energy recovery process becomes controllable, and the energy recovery process can be intervened at any time according to the requirements; the consistency of the foot feeling during the whole action under various conditions can be ensured.
Description
Technical Field
The invention relates to the field of braking systems, in particular to an electric power-assisted braking system.
Background
The electric power assisting system adopted in the current market mainly comprises: the braking system of the Honda hybrid vehicle adopts a double-braking master cylinder mode to realize the functions; the bosch is realized by adopting an ibooster+eschev mode; the braking energy recovery is realized by using a dead travel mode by the Nasen.
The prior art scheme mainly has the following disadvantages: the braking system of the Honda hybrid vehicle adopts a double-brake master cylinder mode to realize functions, has higher cost and higher requirement on the installation position; the bosch is realized by adopting an ibooster+eschev mode, and the ibooster+eschev mode and the eschev mode are required to be used together to realize corresponding functions, so that the application condition of the product is limited; the function of energy recovery is realized by using an idle stroke mode by taking the forest, but the condition of deep stepping occurs when the power fails, so that the user is panicked.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide an electric power-assisted braking system.
The invention aims at being completed by the following technical scheme: the electric power-assisted braking system mainly comprises a braking main cylinder body, a braking main cylinder piston, an electromagnetic valve, a liquid storage cavity, a motor, a gear, a box body, an output rod, an upper cover, a push rod, an input rod, a shifting fork, a screw rod, a bearing, a clamping ring, a flat key, a gear pair, a sensor chip and a magnetic body, wherein an output shaft of the motor is connected with the gear, the gear transmits torque to the screw rod through the gear pair, the gear pair is connected with the screw rod through the flat key, the screw rod is internally matched and connected with the screw rod to convert the torque transmitted by the gear pair into thrust to an output rod at one end of the screw rod, the output rod transmits the thrust to the braking main cylinder piston at one end to generate hydraulic pressure required by braking, the output rod and the screw rod are two separated parts, and the output rod is provided with a U-shaped groove; the U-shaped groove size of the output rod is adjusted according to the requirement, when braking compensation is required, the motor drives the gear pair to drive the screw nut to rotate through the gear, so that the screw rod is pushed to advance, the output rod is pushed, and the push rod cannot be influenced due to the existence of the U-shaped groove, so that the input rod and the shifting fork are not driven to move. A liquid storage cavity and an electromagnetic valve are arranged in the brake master cylinder body.
The nut is installed on the bearing so as to realize positioning and rotation, and one end of the nut is limited through the clamping ring.
One end of the shifting fork is connected with the pedal to obtain input intention, the other end of the shifting fork is connected with the input rod to transmit the input intention and input force, the push rod is connected with the input rod, the magnetic body is connected with the push rod to reflect the change of input displacement, and the sensor chip is arranged in the sensor to output the displacement change of the magnetic body.
The components are arranged in the box body and sealed through the upper cover, and the brake master cylinder piston is arranged in the brake master cylinder body.
An elastic body A is arranged between the push rod and the input rod to simulate the jump value function of the vacuum booster through prepressing.
An elastic body B is arranged in the upper cover and is pre-pressed through a clamping ring, the elastic body B is used as a simulation element of pedal feedback force, and a sealing check ring is arranged on the inner side of the clamping ring and used as dust prevention.
The push rod and the input rod are connected in a spherical input mode.
The beneficial effects of the invention are as follows: the invention realizes a novel energy recovery mode, realizes the electric power-assisted braking of the vehicle, can be matched with the whole vehicle to recover relevant energy without the support of ESC, saves the cost and improves the applicability of the product; a normally closed valve is added on the braking main cylinder, so that the whole energy recovery process becomes controllable, and the energy recovery process can be intervened at any time according to the requirement; the spring is used as the foot feeling simulation, so that the consistency of the foot feeling in the whole action process under various conditions can be ensured; the power assisting system adopts a split decoupling mode to realize hydraulic compensation action without influencing foot feeling, so that no illegal sense is ensured in the use process of a user.
Drawings
Fig. 1 is a cross-sectional view of the structure of the present invention.
Fig. 2 is a schematic view of the appearance of the present invention.
Fig. 3 is a top cross-sectional view of the structure of the present invention.
Fig. 4 is a schematic view of the structure of the surrounding part of the output rod of the present invention.
Reference numerals illustrate: the brake master cylinder comprises a brake master cylinder body 101, a brake master cylinder piston 102, an electromagnetic valve 103, a liquid storage cavity 104, a motor 201, a gear 202, a box 3, an output rod 4, a U-shaped groove 401, an elastic body A5, an upper cover 7, an elastic body B801, a sealing retainer 802, a clamping ring 803, a push rod 901, an input rod 902, a shifting fork 903, a screw 10, a screw rod 11, a bearing 12, a clamping ring 1201, a flat key 13, a gear pair 14, a sensor 15, a sensor chip 1501 and a magnetic body 16.
Detailed Description
The invention will be described in detail below with reference to the attached drawings:
examples: as shown in the drawing, the electric power-assisted braking system mainly comprises a brake master cylinder body 101, a brake master cylinder piston 102, an electromagnetic valve 103, a liquid storage cavity 104, a motor 201, a gear 202, a box 3, an output rod 4, an upper cover 7, a push rod 901, an input rod 902, a shifting fork 903, a nut 10, a screw rod 11, a bearing 12, a clamping ring 1201, a flat key 13, a gear pair 14, a sensor 15, a sensor chip 1501 and a magnetic body 16, wherein an output shaft of the motor 201 is connected with the gear 202, the gear 202 transmits torque to the nut 10 through the gear pair 14, the gear pair 14 is connected with the nut 10 through the flat key 13, the nut 10 is mounted on the bearing 12 to realize positioning and rotation, one end of the nut 10 is limited through the clamping ring 1201, the screw rod 11 is connected with the nut 10 in a matched manner so as to convert the torque transmitted by the gear pair 14 into pushing force to the output rod 4 at one end of the screw rod 11, the output rod 4 and the screw rod 11 are two separated parts, and the output rod 11 is provided with a U-shaped groove 401. The output rod 4 transmits thrust to the master cylinder piston 102 at one end to generate hydraulic force required for braking, one end of the shifting fork 903 is connected with the pedal to obtain input intention, the other end of the shifting fork 903 is connected with the input rod 902 to transmit input intention and input force, the push rod 901 is connected with the input rod 902, and an elastomer A5 is arranged between the push rod 901 and the input rod 902 to simulate the jump value function of the vacuum booster through pre-pressing. The push rod 901 and the input rod 902 are connected by adopting a spherical input mode. The magnetic body 16 is connected to the push rod 901 to reflect the change of the input displacement, the sensor chip 1501 is mounted in the sensor 15 to output the change of the displacement of the magnetic body 16, the above components are mounted in the case 3 and sealed by the upper cover 7, the elastic body B801 is mounted in the upper cover 7, the pre-pressing is performed by the collar 803, the elastic body B801 is used as a simulation element of the pedal feedback force, and the sealing ring 802 is provided inside the collar 803 as dust prevention. The master cylinder piston 102 is provided in the master cylinder body 101, and the reservoir 104 and the solenoid valve 103 are provided in the master cylinder body 101.
The working principle of the invention is as follows:
in the event of an electrical system failure, pedal force is transmitted to the fork 903, to the input rod 902, to the push rod 901, and to the output rod 4, thereby acting on the brake master cylinder piston 102 to create brake fluid pressure.
During normal braking, the input on the pedal is transmitted to the push rod 901 to drive the magnetic body 16 to move, the sensor chip 1501 senses the displacement of the magnetic body 16 to generate a signal, and the signal is transmitted to the ECU, so that the action of the motor 201 is controlled, the gear pair 14 is driven to rotate, and the thrust is generated under the cooperation of the screw 10 and the screw 11 to form power assistance.
During active braking, the ECU receives signals transmitted from the outside, controls the motor 201 to act, and further drives the gear pair 14 to rotate, and generates thrust under the cooperation of the screw 10 and the screw rod 11, so as to form power assistance.
During braking energy recovery, the solenoid valve 103 is opened, thereby storing brake fluid in the reservoir 104, and braking torque is generated by the vehicle motor. The U-shaped groove 401 is formed on the output rod 4, so that the push rod 901 is not disturbed when braking torque compensation is required, and the change of pedal position is avoided.
It should be understood that equivalents and modifications to the technical scheme and the inventive concept of the present invention should fall within the scope of the claims appended hereto.
Claims (4)
1. An electric power-assisted braking system, characterized in that: the brake master cylinder mainly comprises a brake master cylinder body (101), a brake master cylinder piston (102), an electromagnetic valve (103), a liquid storage cavity (104), a motor (201), a gear (202), a box body (3), an output rod (4), an upper cover (7), a push rod (901), an input rod (902), a shifting fork (903), a screw (10), a screw rod (11), a bearing (12), a clamping ring A (1201), a flat key (13), a gear pair (14), a sensor (15), a sensor chip (1501) and a magnetic body (16), wherein an output shaft of the motor (201) is connected with the gear (202) through the gear pair (14) to transmit torque to the screw rod (10), the gear pair (14) is connected with the screw rod (10) through the flat key (13), the screw rod (11) is connected in an internal fit manner so as to convert the torque transmitted by the gear pair (14) into pushing force to the output rod (4) at one end of the screw rod (11), and the output rod (4) transmits the pushing force to the brake master cylinder (102) at one end so as to generate hydraulic force required by braking; the output rod (4) and the screw rod (11) are two separated parts, and the output rod (4) is provided with a U-shaped groove (401); the size of the U-shaped groove (401) of the output rod (4) is adjusted according to the following requirement, when braking compensation is required, the motor (201) drives the gear pair (14) through the gear (202) to drive the screw nut (10) to rotate, so that the screw rod (11) is pushed to advance, the output rod (4) is pushed to ensure that the input rod (902) and the shifting fork (903) are not driven to move, and the liquid storage cavity (104) and the electromagnetic valve (103) are arranged in the brake master cylinder body (101);
an elastic body A (5) is arranged between the push rod (901) and the input rod (902) to simulate the jump value function of the vacuum booster through prepressing;
an elastic body B (801) is arranged in the upper cover (7), pre-pressing is carried out through a clamping ring B (803), the elastic body B (801) is used as a simulation element of pedal feedback force, and a sealing check ring (802) is arranged on the inner side of the clamping ring B (803) to prevent dust.
2. The electric power assisted braking system of claim 1, wherein: the nut (10) is arranged on the bearing (12) to realize positioning and rotation, and one end of the nut (10) is limited by the clamping ring A (1201).
3. The electric power assisted braking system of claim 1, wherein: one end of the shifting fork (903) is connected with the pedal to obtain input intention, the other end of the shifting fork (903) is connected with the input rod (902) to transmit the input intention and input force, the push rod (901) is connected with the input rod (902), the magnetic body (16) is connected with the push rod (901) to reflect the change of input displacement, and the sensor chip (1501) is installed in the sensor (15) to output the displacement change of the magnetic body (16).
4. The electric power assisted braking system of claim 1, wherein: the push rod (901) and the input rod (902) are connected in a spherical input mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910451789.5A CN110203188B (en) | 2019-05-28 | 2019-05-28 | Electric power-assisted braking system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910451789.5A CN110203188B (en) | 2019-05-28 | 2019-05-28 | Electric power-assisted braking system |
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| CN110203188A CN110203188A (en) | 2019-09-06 |
| CN110203188B true CN110203188B (en) | 2023-10-27 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111267797A (en) * | 2020-02-18 | 2020-06-12 | 万向钱潮股份有限公司 | Pedal input rod structure of automobile brake power-assisted system |
| CN111550507A (en) * | 2020-05-14 | 2020-08-18 | 贵州航天林泉电机有限公司 | Electromechanical actuator for unmanned aerial vehicle brake |
| CN112389396A (en) * | 2020-12-04 | 2021-02-23 | 万向钱潮股份有限公司 | Electronic power-assisted brake system |
| CN112537283A (en) * | 2020-12-23 | 2021-03-23 | 万向钱潮股份有限公司 | Electronic brake booster pedal feel simulator |
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| CN210852420U (en) * | 2019-05-28 | 2020-06-26 | 万向钱潮股份有限公司 | Electric power-assisted brake system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US6574959B2 (en) * | 2001-08-02 | 2003-06-10 | Delphi Technologies, Inc. | Electric brake booster with unrestricted manual push through |
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Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101875353A (en) * | 2009-04-30 | 2010-11-03 | 日立汽车***株式会社 | Brake system |
| WO2013179746A1 (en) * | 2012-06-01 | 2013-12-05 | 日立オートモティブシステムズ株式会社 | Hydraulic pressure generation device |
| CN105774788A (en) * | 2016-03-04 | 2016-07-20 | 吉林大学 | Electric power-assisted braking system with composite functions |
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| CN110203188A (en) | 2019-09-06 |
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Address after: 311215 Wanxiang Road, Xiaoshan District, Hangzhou City, Zhejiang Province Applicant after: Wanxiang Qianchao Co.,Ltd. Applicant after: WANXIANG GROUP Co.,Ltd. Address before: No.1 Wanxiang Road, Xiaoshan Economic and Technological Development Zone, Hangzhou City, Zhejiang Province Applicant before: WANXIANG QIANCHAO Co.,Ltd. Applicant before: WANXIANG GROUP Co.,Ltd. |
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