CN205689645U - A kind of dual-wedge formula automobile electromechanical brake - Google Patents

Abstract

The utility model discloses a double-wedge type automobile electromechanical brake, which comprises a brake caliper body and a brake disc. Friction plates are arranged on both sides of the brake disc, and the rear friction plate is fixedly connected to a piston. The body moves axially; the piston is connected with the left wedge through the gap adjustment mechanism; balls are arranged on both sides of the trapezoidal slider to contact the left wedge and the right wedge; the trapezoidal slider is connected with the brake caliper body through the guide flat key; The nut shaft of the nut shaft is connected with the connecting rod mechanism to realize the conversion of the rotary motion of the brake drive motor into linear motion; the lower connecting rod of the connecting rod mechanism is connected with the right wedge; the connecting rod mechanism and the wedge block mechanism have a force gain effect. The utility model has the functions of force boosting and gap automatic adjustment, and can automatically adjust the gap between the friction plate and the brake disc to ensure the constancy of the braking response. The utility model has the advantages of simple structure, convenient installation and energy saving.

Description

A double-wedge type automotive electromechanical brake

technical field

The utility model relates to an automobile braking system, in particular to an automobile electromechanical brake.

Background technique

With the development and transformation of modern automobile technology, people have higher and higher requirements for the safety, comfort and power of automobiles. As an important part of the automobile, the automobile braking system directly affects the safety performance of the automobile. Automobile braking technology is gradually developing towards electro-mechanical systems, and a more secure, efficient, energy-saving, and environmentally-friendly automotive electro-mechanical braking system has emerged.

Automotive electromechanical brakes change the traditional hydraulic drive to electric drive, which makes up for the defects of hydraulic circuit leakage and slow response, and can implant a large number of electronic control system functions into it.

However, the existing electronic mechanical brake functions of automobiles are too simplified or missing, and lack the automatic adjustment function of brake clearance. At the same time, there are also problems of large structural size and difficult installation, and its performance cannot meet the loading requirements.

Utility model content

The technical problem to be solved by the utility model is to provide a double-wedge type automotive electromechanical brake, which has the functions of force boosting and gap automatic adjustment at the same time.

In order to solve the above-mentioned technical problems, the technical solution of the utility model double-wedge type automotive electromechanical brake is:

Including the motor 7, the nut shaft 8 output by the motor 7 cooperates with the screw rod 12 to form a screw drive, so as to realize the conversion of the rotary motion of the brake motor 7 into a linear motion. The screw rod one 12 forms a slider connection with the connecting rod sleeve 11, and the screw rod one 12 moves to the right to drive the connecting rod mechanism, and the connecting rod mechanism pushes the right wedge 16 to move down, and the right wedge 16 moves down to push the trapezoidal slider 17 to move to the left, thereby pushing The left wedge 19 and the piston 4 are pressed to the brake disc 24 to realize service braking, and the motor 7 reverses to release the brake.

Friction plates are installed on both sides of the brake disc 24, and the rear friction plate 23 is fixedly connected to the piston 4; the piston 4 is connected to the brake caliper body 21 through a rectangular sealing ring 20 to realize axial movement. The piston 4 is connected with the left wedge 19 through the gap adjustment mechanism 14 .

Described link mechanism is made up of upper link 10, link cover 11, lower link 13. The upper connecting rod 10 is connected with the brake caliper body 21 through the upper hinge 9 ; the lower connecting rod 13 is connected with the right wedge 16 through the lower hinge 15 . In the braking phase, the lower link 13 can promote the right wedge 16 to move down.

Both sides of the trapezoidal slider 17 are provided with balls 33 to contact the left wedge 19 and the right wedge 16; the trapezoidal slider 17 is connected with the brake caliper body 21 through the guide flat key 18; the trapezoidal slider 17 can be moved along the brake caliper Body 21 moves axially.

The right wedge 16 is installed between the right side of the trapezoidal slider 17 and the brake caliper body 21; both the link mechanism and the right wedge mechanism have a force gain effect. The relationship between the axial driving force F1 of the nut shaft 8 output by the motor 7 and the horizontal thrust Fn of the right wedge 16 satisfies:

Fn＝(F1·cotθ1·cotθ2)/2

Where: F1 is the axial driving force of the nut shaft 8;

Fn is the horizontal thrust of right wedge 16, i.e. brake braking force;

θ1 is the angle between the lower link 13 and the vertical direction;

θ2 is the wedge angle of the right wedge 16 .

The gap adjustment mechanism 14 includes a support frame 25 , a fixing screw 26 , a cover plate 27 , a flat key 1 28 , a screw rod 2 29 , a one-way clutch 30 , a flat key 2 31 , and a compression spring 32 . The one-way clutch 30 is installed in the support frame 25 through the flat key two 31; the support frame 25 is fixedly connected with the piston 4; The threaded holes cooperate to form a non-self-locking threaded connection; the support frame 25 and the left wedge 19 are connected by a compression spring 32, and due to the effect of the one-way separator 30, when the compression spring 32 releases the elasticity, the left wedge can be driven 19 for one-way movement.

The technical effect that the utility model can reach is:

The utility model is provided with a connecting rod mechanism and a wedge-shaped block mechanism, and utilizes the force gain effect to reduce energy required for braking and save energy consumption.

In the utility model, through the function of the one-way clutch, when the brake gap is generated by the friction plate, the screw rod 2 installed on the inner ring of the one-way clutch can be driven to rotate through the compression spring, thereby pushing the left wedge to move downward to realize the friction plate Compensation of the brake clearance with the brake disc.

The utility model has the function of automatically adjusting the gap, which can ensure the constancy of the braking speed of the vehicle and the braking performance. Moreover, the utility model has the advantages of simple structure and convenient installation.

Description of drawings

Below in conjunction with accompanying drawing and specific embodiment, the utility model is described in further detail:

Fig. 1 is the structural representation of the utility model double-wedge type automotive electromechanical brake;

Fig. 2 is a partial schematic view of the gap adjustment mechanism of the present invention;

Fig. 3 is a schematic diagram of the force relationship between the connecting rod mechanism and the wedge mechanism of the present invention.

Explanation of the reference signs in the figure:

1 is the front friction plate 2 is the front metal back plate

3 is the front side floating clamp 4 is the piston

5 is the fixing bolt of the motor support frame 6 is the motor support frame

7 is the motor 8 is the nut shaft

9 is the upper hinge 10 is the upper link

11 is connecting rod cover 12 is screw rod one

13 is the lower link 14 is the gap adjustment mechanism

15 is the lower hinge 16 is the right wedge

17 is the trapezoidal slider 18 is the guide flat key

19 is the left wedge 20 is a rectangular sealing ring

21 is the brake caliper body 22 is the rear metal back plate

23 is the rear friction plate 24 is the brake disc

25 is a support frame 26 is a fixing screw

27 is a cover plate 28 is a flat key

29 is screw two 30 is one-way clutch

31 flat key two 32 is compression spring

33 balls

detailed description

As shown in Figure 1, the utility model double-wedge type automotive electromechanical brake includes a brake caliper body 21 and a brake disc 24. Friction plates are arranged on both sides of the brake disc 24, and the front friction plate 1 passes through the front metal back. The plate 2 is fixedly connected to the front floating caliper 3, the rear friction plate 23 is fixedly connected to the piston 4 through the rear metal back plate 22, the piston 4 is connected to the brake caliper body 21 through a rectangular sealing ring 20, and the piston 4 can move along the to move;

The nut shaft 8 output by the motor 7 cooperates with the screw rod 12 to form a thread transmission, so as to realize the conversion of the rotary motion of the brake motor 7 into linear motion. Link mechanism is made up of upper connecting rod 10, connecting rod cover 11, lower connecting rod 13. The upper connecting rod 10 is connected with the brake caliper body 21 through the upper hinge 9 ; the lower connecting rod 13 is connected with the right wedge 16 through the lower hinge 15 .

Form slide block connection between screw rod one 12 and connecting rod cover 11, and screw rod one 12 moves to the right and drives linkage, and the lower link 13 of linkage can push right wedge 16 to move down; Trapezoidal slide block 17 both sides are provided with The ball 33 is in contact with the left wedge 19 and the right wedge 16; the trapezoidal slider 17 is connected with the brake caliper body 21 through the guide flat key 18; the trapezoidal slider 17 can move axially along the brake caliper body 21. The downward movement of the right wedge 16 can push the trapezoidal slide 17, the left wedge 19, and the piston 4 to press the brake disc 24 together.

As shown in FIG. 2 , the gap adjustment mechanism 14 includes a support frame 25 , a fixing screw 26 , a cover plate 27 , a flat key 1 28 , a screw rod 2 29 , a one-way clutch 30 , a flat key 2 31 , and a compression spring 32 . The one-way clutch 30 is installed in the support frame 25 by the flat key two 31; the support frame 25 is fixedly connected with the piston 4; Cooperate to form a non-self-locking threaded connection; the support frame 25 is connected with the left wedge 19 with a compression spring 32, and due to the effect of the one-way separator 30, when the compression spring 32 releases the elasticity, the left wedge 19 can be driven to perform One-way movement.

The working principle of the utility model is:

When the brake brakes (thrust stroke), the motor 7 drives the nut shaft 8 to rotate, the screw rod 12 moves axially, and pushes the connecting rod mechanism to make the right wedge 16 move down, thereby pushing the trapezoidal slider 17 and the left wedge 19 , Piston 4 and rear friction plate 23 are pressed to brake disc 24, and front side floating caliper 3 promotes front friction plate 1 to be close to brake disc 24 simultaneously, has produced braking moment, realizes the braking to wheel.

When the brake is released, the motor 7 reverses to drive the nut shaft 8 to rotate in the opposite direction, the lower connecting rod 13 moves back, drives the right wedge 16 to return, the elastic deformation of the rectangular sealing ring 20 is released, the piston 4, the left wedge 19, the trapezoidal Slide block 17 gets back to original position.

The utility model is provided with a connecting rod mechanism and a wedge mechanism, and the force increasing effect is very obvious.

As shown in Figure 3, F1 is the axial driving force of the nut shaft 8, Fn is the horizontal thrust of the right wedge 16 (that is, the braking force of the brake), θ1 is the angle between the lower link 13 and the vertical direction, and θ2 is the right The wedge angle of the wedge 16 can be obtained according to the above-mentioned geometric relationship and force relationship:

Fn＝(F1·cotθ1·cotθ2)/2

When the values of θ1 and θ2 are small, the braking force Fn of the brake is proportional to the axial driving force F1 of the motor.

The working principle of the gap adjustment mechanism of the present utility model is:

When the front friction plate 1 and the rear friction plate 23 wear and tear, the overall stroke of the piston 4, the left wedge 19, and the trapezoidal slider 17 exceeds the maximum deformation of the rectangular sealing ring 20 during braking. When the brake is released, the right wedge 16 returns, and the piston 4, the left wedge 19, and the trapezoidal slide 17 move to the right under the action of the rectangular sealing ring 20, and the moving distance is less than the braking stroke. 19 keeps in contact all the time, and there will be a gap between the right side of the trapezoidal slider 17 and the right wedge 16. At this time, the non-self-locking screw 29 rotates under the action of the compression spring 32, driving the left wedge 19 to move down, thereby Push the trapezoidal slide block 17 to fit the right wedge block 16 to compensate the amount of wear produced by the friction plates 1 and 23, and realize the gap automatic compensation function.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. The usual changes and replacements by those skilled in the art within the technical scope of the present utility model should be included in the protection scope of the present utility model .

Claims (5)

1. A double wedge type automotive electromechanical brake is characterized in that: comprise motor, connecting rod mechanism, brake caliper body, the nut shaft of motor output cooperates with screw rod one, and screw rod one is fixedly connected with connecting rod mechanism; Screw rod one Moving to the right drives the linkage mechanism, the linkage mechanism pushes the right wedge to move down, the right wedge moves down to push the trapezoidal slider to the left, and then pushes the left wedge and the piston to press the brake disc to achieve braking, and the motor reverses. release the brake; The piston is connected to the left wedge through a gap adjustment mechanism, balls are arranged on both sides of the trapezoidal slider to contact the left wedge and the right wedge, and the trapezoidal slider is connected to the brake caliper body through a guide flat key. 2. The double-wedge type automotive electromechanical brake according to claim 1, characterized in that: the nut shaft output by the motor cooperates with the screw rod to form a thread transmission. 3. The double-wedge type automotive electromechanical brake according to claim 1, characterized in that: the linkage mechanism is composed of an upper linkage, a linkage sleeve, and a lower linkage; the upper linkage and the brake caliper body pass through The upper hinge is connected, and the lower link is connected with the right wedge through the lower hinge. 4. The double-wedge type automotive electro-mechanical brake according to claim 1, wherein the right wedge is installed between the right side of the trapezoidal slider and the body of the brake caliper. 5. The double-wedge type automotive electromechanical brake according to claim 1, characterized in that: the gap adjustment mechanism includes screw rod 2, one-way clutch, support frame, flat key 1, flat key 2, and a compression spring; The one-way clutch is installed in the support frame through the flat key 2, and the support frame is fixedly connected with the piston; the screw rod 2 is installed in the inner ring of the one-way clutch through the flat key 1, and cooperates with the threaded hole of the left wedge to form a non-self-locking thread connection; The support frame is connected with the left wedge by a compression spring, and due to the effect of the one-way clutch, the screw rod two is restricted to rotate in one direction.