CN217682930U

CN217682930U - Electric control brake caliper

Info

Publication number: CN217682930U
Application number: CN202222083785.6U
Authority: CN
Inventors: 郭锋亮; 朱元澄; 李运动; 唐琳; 许志
Original assignee: Wuhu Bethel Automotive Safety Systems Co Ltd
Current assignee: Wuhu Bethel Automotive Safety Systems Co Ltd
Priority date: 2022-08-09
Filing date: 2022-08-09
Publication date: 2022-10-28
Anticipated expiration: 2032-08-09

Abstract

The utility model discloses an automatically controlled braking calliper, including interior braking piece assembly, motion transfer mechanism and adjustment mechanism, motion transfer mechanism includes rotating member and translation piece, and adjustment mechanism includes the piston, automatically controlled braking calliper still include with translation piece with the piston is connected and is used for controlling the piston return mechanism of piston self return when the braking is relieved. The utility model discloses an automatically controlled brake caliper through setting up the return mechanism and directly drive the piston return, can reduce and drag.

Description

Electric control brake caliper

Technical Field

The utility model belongs to the technical field of braking system, specifically speaking, the utility model relates to an automatically controlled brake caliper.

Background

The vehicle breaks away from under incomplete (centre gripping remains) the state at friction disc and brake disc and travels, is called vehicle braking drag (commonly known as drags the mill), and the emergence of dragging (commonly known as drags the mill) can cause fuel consumption to increase, has also shortened the life of friction disc simultaneously, and floating automatically controlled calliper has the multiple factor that can lead to the problem of dragging: the brake block sliding resistance, the clamp body sliding resistance and the piston sliding resistance all cause dragging tendency, and the dragging problem is difficult to completely eliminate;

in the prior art, for example, in patent document CN107076237B, an electrically controlled brake caliper is proposed, in which a hydraulic brake mode is cancelled, a nut and a piston are fixed together with a retainer ring through an annular groove, the piston is pushed by a motion conversion mechanism, and the lead screw nut directly drives the piston to return when returning, so that an active return function of the piston is realized, and the return amount of the piston or a disc gap can be directly controlled. In the patent, an arch-shaped coupling surface is formed between the piston and the screw nut, and the contact form of the arch-shaped coupling surface is similar to that of an arc surface, so that the dislocation of the axis of the piston and the axis of the ball screw can be compensated, and the influence of the deformation of the brake caliper body on the motion conversion mechanism is reduced. However, the patent has a problem that the influence of an overturning moment caused by friction plate pair or tangential impact on a motion conversion mechanism is not considered, in the prior art, a ball screw is frequently used as the motion conversion mechanism of the EMB system, when an output end of the ball screw is subjected to a radial force, a moment for inclining the ball screw around a certain point, which is called an overturning moment, is generated, the overturning moment causes the axial lines of a nut and a screw shaft to deviate, so that the stress of the balls in the ball screw is uneven, and the stress of a few balls is larger due to extrusion, so that the crushing of the balls or the permanent deformation of a raceway is further caused.

In conclusion, the brake caliper in the prior art has the following problems:

1. the sliding resistance of a brake pad, the sliding resistance of a caliper body and the sliding resistance of a piston of a caliper all cause dragging tendency, the dragging is difficult to realize in the prior art, the dragging problem is difficult to completely eliminate, the dragging causes the fuel consumption to increase, and the service life of a friction plate is also shortened;

2. in the existing electric control brake caliper technology, a nut or a piston is directly driven by a motion conversion mechanism to return to eliminate the influence of piston sliding resistance on brake dragging, but the problem is that the influence of overturning moment generated by tangential impact of a friction plate on the motion conversion mechanism during braking is not considered, and the internal failure of the motion conversion mechanism is easily caused.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides an automatically controlled brake caliper, the purpose reduces and drags.

In order to realize the purpose, the utility model discloses the technical scheme who takes does: the electronic control brake caliper comprises an inner brake pad assembly, a motion conversion mechanism and an adjusting mechanism, wherein the motion conversion mechanism comprises a rotating piece and a translation piece, the adjusting mechanism comprises a piston, and the electronic control brake caliper further comprises a piston return mechanism which is connected with the translation piece and the piston and is used for controlling the piston to automatically return when the brake is released.

The piston return mechanism is arranged in a cavity of the motion conversion mechanism and comprises a connecting piece, a fixing piece and an elastic piece, wherein the connecting piece is used for pulling the piston to move along the axial direction when braking is released, the fixing piece is arranged on the connecting piece, and the elastic piece is arranged between the fixing piece and the translation piece.

The connecting piece passes translation piece with the piston, connecting piece with the mounting passes through thread glue, welding or riveting mode fixed connection.

The elastic member is a wave spring, a disc spring or a spiral spring, and is arranged in the inner cavity of the rotating member.

The adjusting mechanisms are arranged at two ends of the motion conversion mechanism, and the adjusting mechanisms are movably connected with the motion conversion mechanism, so that an angle and displacement adjusting space can be formed between the adjusting mechanisms and the motion conversion mechanism.

The adjusting mechanism and the motion conversion mechanism can be movably connected into a spherical pair, a conical pair or a planar pair.

The adjusting mechanism further comprises a bearing with a centering function, and the bearing is arranged between the rotating piece and the brake caliper body.

The bearing is a thrust self-aligning roller bearing or a self-aligning roller bearing.

The adjusting mechanism further comprises a flange, the flange is arranged between the rotating piece and the brake caliper body, and a spherical pair is formed between the flange and the rotating piece.

The piston is of a spherical structure, and a spherical pair is formed between the piston and the translation piece.

The rotating part is provided with an anti-rotation groove, the piston is provided with an anti-rotation boss, and the anti-rotation boss is embedded into the anti-rotation groove.

The end face of the piston is fixedly connected with the inner brake disc, and a return spring is arranged between the support and the brake caliper body.

The utility model discloses an automatically controlled brake caliper through setting up the return mechanism and directly drive the piston return, can reduce and drag.

Drawings

The description includes the following figures, the contents shown are respectively:

fig. 1 is a schematic structural view of an electric control brake caliper according to a first embodiment of the present invention;

fig. 2 is a schematic structural view of an electric control brake caliper according to a second embodiment of the present invention;

fig. 3 is a schematic structural diagram of a piston according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a screw nut according to an embodiment of the present invention;

FIG. 5 is a schematic view of a reduction structure of the forceps body according to an embodiment of the present invention;

labeled as:

1. an actuator; 2. a brake caliper body; 3. a motion conversion mechanism; 3a, a rotating member; 3b, a translation member; 4. an adjustment mechanism; 4a, a bearing; 4b, a piston; 4c, a flange; 5. a limit screw; 6. a piston return mechanism; 6a, a connecting piece; 6b, a fixing piece; 6c, an elastic member; 7. an inner brake pad; 8. a brake disc; 9. an outer brake pad; 10. a support; 11. a return spring; 12. an anti-rotation boss; 13. an anti-rotation groove; 14. a screw limiting groove; 15. a first contact surface; 16. a second contact surface.

Detailed Description

The following detailed description of the embodiments of the present invention will be given with reference to the accompanying drawings, for the purpose of helping those skilled in the art to understand more completely, accurately and deeply the conception and technical solution of the present invention, and to facilitate its implementation.

As shown in fig. 1 and fig. 2, the utility model provides an automatically controlled brake caliper of zero dragging mainly includes executor 1, the brake caliper body 2, interior braking piece 7, outer braking piece 9, motion conversion mechanism 3, piston return mechanism 6 and adjustment mechanism 4. The motion conversion mechanism 3 comprises a rotating piece 3a and a translating piece 3b, the adjusting mechanism 4 mainly comprises two parts, one part is arranged at the input end of the motion conversion mechanism 3 and movably connected between the caliper body 2 and the rotating piece 3a, the other part is arranged at the output end of the motion conversion mechanism 3 and movably connected between the translating piece 3b and the piston 4b, and the adjusting mechanism is used for adapting to the deformation of the caliper body and adapting to the eccentric wear of the brake pad.

The brake caliper has the beneficial effects and the realization mode as follows:

1. the piston 4b has an automatic return function, and ensures that the inner brake pad 7 is separated from the brake disc 8 when the brake is released;

the utility model discloses in, translation piece 3b inner wall sets up the screw thread raceway, translation piece 3b constitutes ball pair with rotating member 3a, translation piece 3b outer wall is provided with the rotation-proof structure of mutually supporting with piston 4b inner wall, piston 4b terminal surface is in the same place with interior braking piece 7 fixed connection again, in prior art, with "eight" word spring, increase the eight word spring promptly between interior braking piece 7 and outer braking piece 9 and can realize that piston 4b terminal surface is fixed with interior braking piece 7 again. When the brake is released, the motion conversion mechanism 3 rotates reversely, the piston 4b drives the inner brake pad 7 to move synchronously under the action of the piston return mechanism 6, so that the inner brake pad 7 is separated from the brake disc 8, the piston 4b and the translation piece 3b are kept in a close state, the automatic return function of the piston 4b is realized, the inner brake pad 7 can be ensured to be completely separated from the brake disc 8, and the dragging caused by the contact of the inner brake pad 7 and the brake disc 8 is avoided.

2. The caliper body resetting structure is arranged, so that the outer brake pad 9 is separated from the brake disc 8 when the brake is released;

the utility model discloses in, increase the splayed spring between interior braking piece 7 and outer braking piece 9, install reset spring 11 between the pincers body and support 10, after the braking release, utilize the elastic force of spring to overcome the sliding resistance of braking piece to and the sliding resistance of the pincers body, with the pincers body pull-back normal position, guarantee that outer braking piece 9 can break away from brake disc 8 completely, avoided leading to dragging because of outer braking piece 9 and 8 contacts of brake disc. The above reset structure belongs to the prior art, and is not described herein.

3. The influence of overturning moment, eccentric wear of a brake pad, clamp body deformation and the like on the motion conversion mechanism 3 can be eliminated through the adjusting mechanism 4, and the service life of the motion conversion mechanism is prolonged;

in the utility model, a double-spherical-surface pair mechanism is formed by the spherical surface structure of the adjusting mechanism 4 and the motion conversion mechanism 3, and is used for adjusting the axial direction of the motion conversion mechanism 3 to keep stable, reducing the deformation of the clamp body and reducing the damage or deformation of the overturning moment to the internal structure of the motion conversion mechanism 3;

the following description is made with reference to specific embodiments:

example one

As shown in fig. 1 and 3 to 5, the brake caliper of the present embodiment includes an actuator 1, a caliper body 2, an inner brake pad 7, an outer brake pad 9, a motion conversion mechanism 3, a piston return mechanism 6, and an adjustment mechanism 4, and the adjustment mechanism 4 includes a piston 4b.

The brake caliper body 2 is of a floating caliper structure and is provided with a cylinder hole and a hook claw structure, and an inner brake pad 7, a brake disc 8 and an outer brake pad 9 are sequentially installed in the hook claw structure. The actuator 1 comprises a motor and a speed-reducing torque-increasing mechanism, wherein the motor is a brushless motor, the speed-reducing torque-increasing mechanism is in gear transmission or worm and gear transmission and at least comprises an output gear. The construction of the caliper body 2 and the actuator 1 is well known to those skilled in the art and will not be described in detail here.

The inner brake disc 7 and the outer brake disc 9 are arranged in a hook claw structure of the brake caliper body 2, a splayed spring is arranged between the inner brake disc 7 and the outer brake disc 9, after braking is released, the splayed spring can provide a force for respectively propping open the inner brake disc 7 and the outer brake disc 9 to two sides of a brake disc 8, the elastic force of the splayed spring overcomes the sliding resistance of the brake disc and the bracket 10, the inner brake disc 7 is attached to the surface of the piston 4b, and the outer brake disc 9 is attached to the inner surface of the hook claw of the brake caliper body 2; a return spring 11 is installed between the bracket 10 and the caliper body to pull the caliper body back to the original position when the brake is released, and the structure of utilizing the spring to return is the prior art and is not described herein again.

As shown in fig. 1, the motion conversion mechanism includes a rotating member 3a and a translating member 3b, the motion conversion mechanism converts the rotational motion transmitted by the speed reduction and torque increase mechanism into a linear motion, and the motion conversion mechanism 3 may be a ball screw pair, a slide screw pair, or the like. In this embodiment, the motion conversion mechanism is a ball screw pair, the rotating member 3a is a screw shaft and has an outer spiral raceway, the translating member 3b is a screw nut, the screw nut is provided with an inner spiral raceway matched with the outer spiral raceway of the screw shaft, a piston 4b is fitted outside the screw nut, the screw nut is provided with an anti-rotation groove 13, and an anti-rotation boss 12 is provided on the piston 4 b; the piston 4b and the inner brake disc 7 are arranged adjacently, and the end surface of the piston 4b is fixedly connected with the inner brake disc 7.

As shown in fig. 1, a piston return mechanism 6 is disposed in the chamber of the motion conversion mechanism 3, and the piston return mechanism 6 includes a connecting member 6a for pulling the piston 4b to move in the axial direction when braking is released, a fixed member 6b provided on the connecting member 6a, and an elastic member 6c provided between the fixed member 6b and the translation member 3 b. The connecting piece 6a passes through the translation piece 3b and the piston 4b, and a through hole for the connecting piece 6a to pass through is arranged at the center of the end faces of the translation piece 3b and the piston 4b. The connecting member 6a includes a rod portion and a flange portion connected, the rod portion passing through a through hole at the center of the end faces of the translation member 3b and the piston 4b and being inserted into the inner cavity of the rotation member 3 a. The flange portion is located outside the piston 4b, the size of the flange portion being larger than the diameter of the through hole at the center of the end face of the piston 4b, the end face of the flange portion being in contact with the end face of the piston 4b, so that the connecting piece 6a can be used to pull the piston 4b to move towards a position away from the brake disc 8 when the piston 4b is returned. The fixing member 6b is located in the inner cavity of the rotating member 3a, the fixing member 6b is fixedly provided on the rod portion, the flange portion is fixedly connected to one end of the rod portion in the longitudinal direction, the elastic member 6c is sandwiched between the fixing member 6b and the inner wall surface of the translating member 3b, and the elastic member 6c applies elastic force to the fixing member 6b and the translating member 3 b.

In the present embodiment, the connecting member 6a is a bolt, the flange is a head of the bolt, and a receiving hole for receiving the head of the flange is provided on a surface of the inner brake pad 7 facing the piston 4b. The fixing piece 6b is a nut, and the connecting piece 6a and the fixing piece 6b are fixedly connected through thread glue, welding or riveting and the like. The elastic member 6c is a wave spring, a disc spring, a coil spring, or the like, and the elastic member 6c is disposed in the inner cavity of the rotary member 3 a. The elastic piece 6c is arranged between the fixing piece 6b and the translation piece 3b, one end of the elastic piece is connected with the fixing piece 6b, the other end of the elastic piece is connected with the translation piece 3b, and the piston 4b is always kept in a tight contact state with the translation piece 3b under the action of the piston return mechanism 6.

When the brake caliper brakes, the motor rotates forwards to drive the speed reduction and torque increase mechanism, the speed reduction and torque increase mechanism drives the rotating piece 3a to rotate, the rotating piece 3a rotates to drive the translation piece 3b to move linearly, and the translation piece 3b drives the piston 4b to press the inner brake pad 7 and the outer brake pad 9, so that the inner brake pad 7 and the outer brake pad 9 are in contact with and pressed against the brake disc 8 to generate braking force.

When the brake caliper releases the brake, the motor reversely rotates to drive the speed reduction and torque increase mechanism, the speed reduction and torque increase mechanism drives the rotating piece 3a to reversely rotate, the rotating piece 3a rotates to drive the translation piece 3b to linearly move, the translation piece 3b is far away from the brake disc 8, the piston 4b is separated from the inner brake disc 7 under the action of the piston return mechanism 6, and the piston 4b and the translation piece 3b are kept in a close state, so that the brake is released.

As shown in fig. 1, the adjusting mechanism 4 is divided into two parts, the two parts are respectively a piston 4b and a bearing 4a with a self-aligning function, the bearing 4a is located in a cylinder hole of the caliper body 2, the bearing 4a is a self-aligning thrust roller bearing, the bearing 4a is arranged at the input end of the motion converting mechanism 3, the bearing 4a is installed at a shaft shoulder position of the rotating member 3a, and the self-aligning thrust roller bearing has a spherical structure inside, which is equivalent to a spherical pair formed between the caliper body 2 and the translating member 3 b. The piston 4b is arranged at the output end of the motion conversion mechanism 3, the contact position of the piston 4b and the translation piece 3b is a spherical structure, and another spherical pair is formed between the translation piece 3b and the piston 4b and used for adjusting the eccentric wear of the brake pad.

As shown in fig. 1, 3 and 4, a first contact surface 15 is provided on the piston 4b, a second contact surface 16 is provided on the translating element 3b, the first contact surface 15 and the second contact surface 16 are attached to each other, the first contact surface 15 and the second contact surface 16 are spherical surfaces with the same diameter, the axes of the first contact surface 15 and the second contact surface 16 are also the axes of the translating element 3b and the piston 4b, the first contact surface 15 is located inside the piston 4b, and the second contact surface 16 is located at the end of the translating element 3 b.

The brake caliper of the embodiment adopts the double-spherical-surface pair mechanism, so that the influence of overturning moment, brake pad eccentric wear, caliper body deformation and the like on the motion conversion mechanism 3 can be eliminated, the internal strength of the motion conversion mechanism 3 is protected, and the service life of the motion conversion mechanism is prolonged.

As shown in fig. 1, 3 and 4, the rotating member 3a is provided with an anti-rotation groove 13, the piston 4b is provided with an anti-rotation boss 12, and the anti-rotation boss 12 is embedded in the anti-rotation groove 13. The anti-rotation boss 12 is arranged on the inner wall surface of the piston 4b, the length of the anti-rotation boss 12 is smaller than that of the anti-rotation groove 13, and the anti-rotation boss 12 prevents the piston 4b from rotating relative to the translation piece 3 b. Set up stop screw 5 on the body of the brake caliper 2, set up screw spacing groove 14 on the outer wall of piston 4b, screw spacing groove 14 extends along the axial of translation piece 3b, and stop screw 5 inserts in screw spacing groove 14 for prevent that translation piece 3b from following rotating member 3a and rotating together, can drive translation piece 3b when rotating member 3a rotates and carry out rectilinear movement along the axial.

Example two:

as shown in fig. 2, the structure of the brake caliper provided in the present embodiment is different from the structure of the brake caliper provided in the first embodiment in that: in this embodiment, the adjusting mechanism 4 is divided into two parts, namely a piston 4b and a flange, the flange having a spherical structure, and a spherical pair being formed between the flange and the rotary member 3 a. The piston 4b is arranged at the output end of the motion conversion mechanism 3, the contact position of the piston 4b and the translation piece 3b is a spherical structure, and another spherical pair is formed between the translation piece 3b and the piston 4b and used for adjusting eccentric wear of the brake pad.

As shown in fig. 2, the flange is fitted over the rotary member 3a, the flange is positioned in the cylinder hole of the caliper body 2, a thrust needle bearing is provided between the flange and the caliper body 2, and a spherical pair is also formed between the caliper body and the motion conversion mechanism 3.

As shown in fig. 2, 3 and 4, a first contact surface 15 is provided on the piston 4b, a second contact surface 16 is provided on the translating element 3b, the first contact surface 15 and the second contact surface 16 are attached to each other, the first contact surface 15 and the second contact surface 16 are spherical surfaces with the same diameter, the axes of the first contact surface 15 and the second contact surface 16 are also the axes of the translating element 3b and the piston 4b, the first contact surface 15 is located inside the piston 4b, and the second contact surface 16 is located at the end of the translating element 3 b.

As shown in fig. 2, the rotating member 3a is provided with a third contact surface, the flange is provided with a fourth contact surface, the third contact surface and the fourth contact surface are attached to each other, the third contact surface and the fourth contact surface are spherical surfaces with the same diameter, and the axial lines of the third contact surface and the fourth contact surface are also the axial lines of the flange and the rotating member 3 a.

In this case, the structural style of the adjusting mechanism 4 is changed, and the working principle is the same as that of the first embodiment, which is not described herein again.

The invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above-described manner. As long as the method conception and the technical scheme of the utility model are adopted for various insubstantial improvements; or without improvement, the above conception and technical scheme of the utility model can be directly applied to other occasions, all within the protection scope of the utility model.

Claims

1. An automatically controlled braking calliper, includes interior braking piece assembly, motion conversion mechanism and adjustment mechanism, and motion conversion mechanism includes rotating member and translation piece, and adjustment mechanism includes the piston, its characterized in that: automatically controlled brake caliper still include with the translation piece with the piston is connected and is used for controlling piston self return's piston return mechanism when the braking is relieved.

2. An electrically controlled brake caliper according to claim 1, wherein: the piston return mechanism is arranged in a cavity of the motion conversion mechanism and comprises a connecting piece, a fixing piece and an elastic piece, wherein the connecting piece is used for pulling the piston to move along the axial direction when braking is released, the fixing piece is arranged on the connecting piece, and the elastic piece is arranged between the fixing piece and the translation piece.

3. An electrically controlled brake caliper according to claim 2, wherein: the connecting piece penetrates through the translation piece and the piston, and the connecting piece is fixedly connected with the fixing piece in a threaded glue, welding or riveting mode.

4. An electrically controlled brake caliper according to claim 2, wherein: the elastic member is a wave spring, a disc spring or a spiral spring, and is arranged in the inner cavity of the rotating member.

5. An electrically controlled brake caliper according to any one of claims 1 to 4, wherein: the adjusting mechanisms are arranged at two ends of the motion conversion mechanism, and the adjusting mechanisms are movably connected with the motion conversion mechanism, so that an angle and displacement adjusting space can be formed between the adjusting mechanisms and the motion conversion mechanism.

6. An electrically controlled brake caliper according to claim 5, wherein: the adjusting mechanism and the motion conversion mechanism can be movably connected into a spherical pair, a conical pair or a planar pair.

7. An electrically controlled brake caliper according to claim 5, wherein: the adjusting mechanism further comprises a bearing with a centering function, and the bearing is arranged between the rotating piece and the brake caliper body.

8. An electrically controlled brake caliper according to claim 7, wherein: the bearing is a thrust self-aligning roller bearing or a self-aligning roller bearing.

9. An electrically controlled brake caliper according to claim 5, wherein: the adjusting mechanism further comprises a flange, the flange is arranged between the rotating piece and the brake caliper body, and a spherical pair is formed between the flange and the rotating piece.

10. An electrically controlled brake caliper according to claim 5, wherein: the piston is provided with a spherical surface structure, and a spherical surface pair is formed between the piston and the translation piece.

11. An electrically controlled brake caliper according to any one of claims 1 to 4, wherein: the rotating part is provided with an anti-rotation groove, the piston is provided with an anti-rotation boss, and the anti-rotation boss is embedded into the anti-rotation groove.

12. An electrically controlled brake caliper according to any one of claims 1 to 4, wherein: the brake caliper further comprises a brake caliper body and a support, and a return spring is arranged between the support and the brake caliper body.

13. An electrically controlled brake caliper according to any one of claims 1 to 4, wherein: the end face of the piston is fixedly connected with the inner brake disc, and a return spring is arranged between the support and the brake caliper body.