CN110901609A

CN110901609A - Novel automobile electronic braking power assisting device

Info

Publication number: CN110901609A
Application number: CN201911280111.1A
Authority: CN
Inventors: 高祥; 颜丙杰; 李小康; 杨志刚
Original assignee: Tianjin Emtronix Huizhi Automobile Technology Co Ltd
Current assignee: Tianjin Emtronix Huizhi Automobile Technology Co Ltd
Priority date: 2019-12-13
Filing date: 2019-12-13
Publication date: 2020-03-24

Abstract

The invention discloses a novel automobile electronic brake booster, which comprises a motor, a lifting lug, a shaft lever, a screw rod, a connecting slide rail, a sleeve rod, a cushion pad, a main cylinder top, a main cylinder, a slide block, a guide rod, a front cylinder cover and a rear cylinder cover, and is characterized in that: the front cylinder cover is connected with the rear cylinder cover; the motor is connected with the driving gear; the driving gear is in transmission connection with a central gear sleeved on the screw rod through a transition gear; the central gear is fixedly arranged on the bearing; the bearing is fixed on the front cylinder cover, the loop bar is arranged in the mounting sleeve, the acting force is controlled through the two buffer springs, the force of feet of a driver is squeezed by the pedal when the active pressurization mode can be effectively controlled, and the operation safety of the driver is guaranteed.

Description

Novel automobile electronic braking power assisting device

Technical Field

The invention relates to the technical field of automobile braking, in particular to a novel automobile electronic braking power assisting device.

Background

At present, a vacuum booster device is generally adopted in a traditional fuel automobile as a boosting device for boosting during braking, an engine is used as a power source, the vacuum booster pumps vacuum through the engine, the force of a driver stepping on a brake pedal is amplified to push a main cylinder piston to move, and therefore pressure build-up of a main cylinder in a braking process is generated, and braking of the automobile is achieved.

The existing power assisting device utilizes a pin structure to connect a pedal and a lifting lug at the tail end of the device together, namely, when a driver steps on the pedal and releases the pedal, the pedal and a push rod are ensured to move forwards and backwards together, but the structural form of the connection of the pedal and the lifting lug determines that the pedal must move together with the push rod under the three working modes, and because a cross pressing sheet is arranged at the front ends of a shaft lever and a sleeve lever in the device, the sleeve lever provided with the cross pressing sheet can be continuously pushed to move forwards after a sliding rail moves to push the sleeve lever provided with the cross pressing sheet to drive the pedal continuously, and a buffer mechanism does not exist in the device, when the pedal is blocked by an object, the pedal can form a certain strength acting force on the object, for example, when the driver does not sense that emergency active braking occurs, and the foot is just under the pedal, the pedal is driven by an internal transmission mechanism to move downwards continuously to, causing injury to the feet of the driver. Therefore, the invention provides a novel automobile electronic brake booster device to solve the defects.

Disclosure of Invention

The invention provides a novel automobile electronic brake power assisting device, which aims to overcome the defect of safety risk of reducing the problem of presser foot caused by the movement of a pedal along with a linkage device when the electronic brake power assisting device in the prior art is in an active pressurization mode. The automobile electronic brake power assisting device has the characteristics of compact structure, convenience in assembly, capability of effectively solving the problem of presser foot caused by the fact that the pedal moves along with the linkage device, and the like.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a novel automobile electronic braking booster unit, includes motor, lug, axostylus axostyle, lead screw, connects slide rail, loop bar, blotter, main cylinder top, main cylinder, slider, installation short screw, preceding cylinder cap and back cylinder cap, its characterized in that: the front cylinder cover is connected with the rear cylinder cover; the motor is connected with the driving gear; the driving gear is in transmission connection with a central gear sleeved on the screw rod through a transition gear; the central gear is fixedly arranged on the bearing; the bearing outer ring is arranged on the front cylinder cover; a through hole is formed in the middle of the screw rod, one end of the shaft rod is connected with the lifting lug, and the other end of the shaft rod penetrates through the through hole in the screw rod and is connected with one end of the loop bar; the sleeve rod is positioned in the mounting sleeve; the buffer pad is positioned at one end of the mounting sleeve far away from the shaft rod; the other end of the loop bar is close to the cushion pad; a boss is formed in the middle of the sleeve rod; one end of the first buffer spring abuts against the mounting sleeve, and the other end of the first buffer spring abuts against the boss; one end of the second buffer spring abuts against the boss, and the other end of the second buffer spring abuts against the screw rod; one end of the main cylinder top is positioned in the mounting sleeve and abuts against the buffer pad, and the other end of the main cylinder top is connected with the main cylinder; the connecting slide rail is sleeved on the mounting sleeve and is positioned at one end close to the shaft lever; the connecting slide rail is connected with a guide rod which penetrates through the front cylinder cover and the rear cylinder cover and is fixed at the back; one end of the return spring abuts against the connecting slide rail, and the other end of the return spring abuts against the rear cylinder cover; the lifting lug, the shaft rod, the screw rod, the connecting slide rail, the loop bar, the cushion pad and the master cylinder top head are positioned on the same axis.

Preferably, one end of the shaft rod close to the sleeve rod forms a spherical ball head; one end of the sleeve rod close to the shaft rod is provided with a connecting hole; the ball head is mounted in the connecting hole through compression joint to realize connection of the shaft lever and the sleeve lever.

Preferably, the hole bottom of the connecting hole is V-shaped.

Preferably, a sensor magnetic component is connected to the side wall of the loop bar; and a sensor magnetic component is arranged on the mounting sleeve.

Preferably, the guide rod is convexly provided with a guide block; the guide block is connected with the guide rod.

Compared with the prior art, the invention has the beneficial effects that: the loop bar is arranged in the installation sleeve, acting force is controlled through the two buffer springs, and when the active pressurization mode can be effectively controlled, the pedal extrudes the force of feet of a driver, so that the operation safety of the driver is guaranteed.

Drawings

FIG. 1 is a first cross-sectional view of an electric brake booster for a vehicle according to the present invention;

FIG. 2 is a second cross-sectional view of the electric brake booster of the present invention;

FIG. 3 is a detailed view of the electric brake booster of the present invention;

FIG. 4 is a structural diagram of a screw rod, a central gear and a bearing seat in the electronic brake booster of the automobile;

fig. 5 is a structural diagram of a mounting sleeve, a connecting slide rail and a screw rod in the automobile electronic brake booster device.

Reference numbers in the figures: 1. lifting lugs; 10. a return spring; 11. a master cylinder; 12. a master cylinder plug; 13. a cushion pad; 14. a first buffer spring; 15. installing a sleeve; 16. a slider; 17. a sensor magnetic component; 19. a second buffer spring; 2. a shaft lever; 20. connecting a slide rail; 21. a front cylinder cover; 22. a screw rod; 25. a transition gear; 26. a driving gear; 27. a motor; 28. mounting short screws; 3. a guide bar; 5. a bearing; 6. a sun gear; 7. a rear cylinder cover; 8. a loop bar; 9. and a guide block.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-4, the present invention provides a technical solution: a novel automobile electronic braking power assisting device comprises a motor 27, a lifting lug 1, a shaft rod 2, a lead screw 22, a connecting slide rail 20, a loop bar 8, a cushion pad 13, a main cylinder top 12, a main cylinder 11, a slide block 16, a mounting short screw 28, a front cylinder cover 21 and a rear cylinder cover 7, wherein the front cylinder cover 21 is connected with the rear cylinder cover 7; the motor 27 is connected with the driving gear 26; the driving gear 26 is in transmission connection with the central gear 6 sleeved on the screw rod 22 through a transition gear 25; the central gear 6 is arranged on the bearing 5 and fixed; the outer ring of the bearing 5 is arranged on the front cylinder cover 21; a through hole is formed in the middle of the screw rod 22, one end of the shaft rod 2 is connected with the lifting lug 1, and the other end of the shaft rod passes through the through hole in the screw rod 22 and is connected with one end of the loop bar 8; the loop bar 8 is located in the mounting sleeve 15; the cushion pad 13 is located at the end of the mounting sleeve 15 remote from the shaft 2; the other end of the loop bar 8 is close to the cushion pad 13; a boss is formed in the middle of the loop bar 8; one end of the first buffer spring 14 abuts against the mounting sleeve 15, and the other end abuts against the boss; one end of the second buffer spring 19 is propped against the boss, and the other end is propped against the screw rod 22; one end of the main cylinder top 12 is positioned in the mounting sleeve 15 and abuts against the cushion pad 13, and the other end is connected with the main cylinder 11; the connecting slide rail 20 is sleeved on the mounting sleeve 15 and is positioned at one end close to the shaft lever 2; the connecting slide rail 20 is connected with a guide rod 3 which penetrates through the front cylinder cover 21 and the rear cylinder cover 7 and is fixed at the back; a guide block 9 is convexly arranged on the guide rod 3; the guide block 9 is connected with the guide rod 3, one end of the return spring 10 abuts against the connecting slide rail 20, and the other end abuts against the rear cylinder cover 7; one ends of the lifting lug 1, the shaft lever 2 and the shaft lever 2 close to the loop bar 8 form a spherical ball head; one end of the loop bar 8 close to the shaft lever 2 is provided with a connecting hole; the ball head is arranged in the connecting hole through compression joint to realize the connection of the shaft lever 2 and the loop bar 8, and the side walls of the screw rod 22, the connecting slide rail 20, the loop bar 8 and the loop bar 8 are connected with a sensor magnetic assembly 17; the mounting sleeve 15 is provided with a sensor magnetic assembly 17, and the cushion pad 13 and the master cylinder head 12 are located on the same axis.

The working principle is as follows: the brake power assisting device can realize three action modes, namely active braking, power assisting braking and backup braking, and a part consisting of a screw rod 22, a sliding block 16, a connecting slide rail 20, a mounting sleeve 15, a shaft rod 2, a sleeve rod 8, a first buffer spring 14, a second buffer spring 19, a buffer pad 13 and a main cylinder top 12 can generate integral displacement during the active braking and the power assisting braking, and finally a main cylinder piston of a main cylinder 11 is pushed to complete pressure building. Different from active braking, the boosting braking needs to generate a signal through the relative displacement between the sensor magnetic assembly 17 arranged on the loop bar 8 and the sensor magnetic assembly 17, transmit the signal to a controller, and then perform the boosting process. The backup braking is different from the working process of the active braking and the boosting braking, the shaft lever 2, the loop bar 8, the buffer cushion 13 and the main cylinder top 12 are completely pushed by the force of treading by people in sequence to finally push the piston of the main cylinder 11 to complete pressure building, the return spring 10 cannot be compressed in the process, and the first buffer spring 14 is compressed.

During active braking, the motor 27 only receives an automobile braking signal, when the braking signal is received, the motor 27 works to transmit torque to the central gear 6 through the driving gear 26 and the transition gear 25, trapezoidal threads are machined in the center of the central gear 6, the lead screw 22 is matched with the central gear 6, the rotary motion of the central gear 6 drives the lead screw 22 to do linear motion, the lead screw 22, the connecting slide rail 20 and the mounting sleeve 15 are fastened on the connecting slide rail 20, the connecting slide rail 20 is matched with the guide rod 3 through the slider 16, it is guaranteed that the mounting sleeve 15 can do linear non-rotary motion, the mounting sleeve 15 is pushed by the lead screw 22 to drive the main cylinder top 12 to move forwards, and finally the main cylinder top 12 pushes the piston of the main cylinder 11 to build pressure. The second buffer spring 19 is compressed under the push of the connecting slide rail 20 and can drive the loop bar 8 to move forward, and the loop bar 8 is not in contact with the buffer pad 13. In the normal initiative braking process, when the footboard does not receive the object jamming, lead screw 22 is promoting the whole forward motion of inner structure, second buffer spring 19 is installed between loop bar 8 and lead screw 22, lead screw 22 is because footboard return spring's effect second buffer spring 19 is compressed when promoting forward, the compressive force of second buffer spring 19 promotes loop bar 8 motion on transmitting loop bar 8 again, loop bar 8 drives 2 and the lug 1 motion on the axostylus axostyle 2 at rear portion, finally drives the footboard motion. When the pedal is stuck to the feet of a person in the active braking process, the pedal tends to stop, the lifting lug 1, the shaft rod 2 and the loop bar 8 tend to stop, the main cylinder top 12 continues to move forwards to generate braking force for ensuring that the connecting slide rail 20 continues to drive the main cylinder top 12, the lead screw 22 is required to continue to push forwards, the first buffer spring 14 between the loop bar 8 and the lead screw 22 is greatly compressed, the lifting lug 1 relevant to the pedal movement is ensured to be removed, the shaft rod 2 and other parts except the loop bar 8 still play a role, the enough buffering effect is achieved, the force acting on the feet when the pedal is extruded to the feet of a driver is only the compression force of the first buffer spring 14, and the protection effect is achieved.

When a person steps on the pedal during power-assisted braking, the sensor magnetic component 17 arranged on the loop bar 8 moves along with the loop bar 8, the first buffer spring 14 is compressed, the sensor magnetic component 17 arranged on the side surface of the mounting sleeve 15 detects that relative displacement occurs, the elastic force of the first buffer spring 14 is required to be smaller than that of the return spring 10, namely, when the driver starts to step on the pedal, the loop bar 8 moves firstly, so that the sensor magnetic component 17 can detect whether braking is needed or not, after the driver steps on the pedal, power assistance starts, the process after power assistance starts is the same as the working principle of the active braking process, the lead screw 22 pushes the front end part to move integrally, finally, the piston of the main cylinder 11 is compressed under the action of the main cylinder top head 12 to build pressure, but at the moment, different from the active braking process, the loop bar 8 generates displacement forwards, and the first buffer spring 14 is compressed, the positive displacement is detected by the sensor magnetic assembly 17; when the sensor detects that the loop bar 8 generates return stroke, namely the sensor magnetic assembly 17 detects that the positive displacement becomes small, the boosting is finished or the boosting force is kept, and each mechanism returns or keeps at a certain position under the action of the boosting force generated by the return spring 10 or the motor 27 so as to keep certain braking boosting force.

When the power assisting mechanism breaks down and needs backup braking, a driver steps on a pedal and directly drives the loop bar 8 to push the main cylinder top 12 at the front part of the cushion pad 13 through the shaft rod 2, the main cylinder top 12 further pushes the main cylinder 11 to move to complete pressure build, the first buffer spring 14 is compressed in the process, and the pre-pressing amount of the return spring 10 is kept unchanged during installation.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a novel automobile electronic braking booster unit, includes motor (27), lug (1), axostylus axostyle (2), lead screw (22), connects slide rail (20), loop bar (8), blotter (13), master cylinder top (12), master cylinder (11), slider (16), installation short screw (28), preceding cylinder cap (21) and back cylinder cap (7), its characterized in that: the front cylinder cover (21) is connected with the rear cylinder cover (7); the motor (27) is connected with the driving gear (26); the driving gear (26) is in transmission connection with a central gear (6) sleeved on the screw rod (22) through a transition gear (25); the central gear (6) is arranged on the bearing (5) and fixed; the outer ring of the bearing (5) is arranged on the front cylinder cover (21); a through hole is formed in the middle of the screw rod (22), one end of the shaft rod (2) is connected with the lifting lug (1), and the other end of the shaft rod penetrates through the through hole in the screw rod (22) and is connected with one end of the loop bar (8); the sleeve rod (8) is positioned in the mounting sleeve (15); the buffer pad (13) is positioned at one end of the mounting sleeve (15) far away from the shaft rod (2); the other end of the loop bar (8) is close to the buffer pad (13); a boss is formed in the middle of the sleeve rod (8); one end of the first buffer spring (14) abuts against the mounting sleeve (15), and the other end abuts against the boss; one end of a second buffer spring (19) abuts against the boss, and the other end of the second buffer spring abuts against the screw rod (22); one end of the main cylinder top head (12) is positioned in the mounting sleeve (15) and abuts against the cushion pad (13), and the other end of the main cylinder top head is connected with the main cylinder (11); the connecting slide rail (20) is sleeved on the mounting sleeve (15) and is positioned at one end close to the shaft lever (2); the connecting slide rail (20) is connected with a guide rod (3) which penetrates through the front cylinder cover (21) and the rear cylinder cover (7) and is fixed at the back; one end of the return spring (10) abuts against the connecting slide rail (20), and the other end abuts against the rear cylinder cover (7); the lifting lug (1), the shaft rod (2), the screw rod (22), the connecting slide rail (20), the loop bar (8), the cushion pad (13) and the master cylinder top head (12) are positioned on the same axis.

2. The novel automobile electronic brake booster device according to claim 1, characterized in that: one end of the shaft lever (2) close to the loop bar (8) forms a spherical ball head; one end of the sleeve rod (8) close to the shaft lever (2) is provided with a connecting hole; the ball head is mounted in the connecting hole through crimping to realize the connection of the shaft lever (2) and the loop bar (8).

3. The novel automobile electronic brake booster device according to claim 2, characterized in that: the hole bottom of the connecting hole is V-shaped.

4. The novel automobile electronic brake booster device according to claim 1, characterized in that: the side wall of the loop bar (8) is connected with a sensor magnetic component (17); and a sensor magnetic component (17) is arranged on the mounting sleeve (15).

5. The novel automobile electronic brake booster device according to claim 1, characterized in that: a guide block (9) is convexly arranged on the guide rod (3); the guide block (9) is connected with the guide rod (3).