CN117628086A - Electric control brake caliper - Google Patents
Electric control brake caliper Download PDFInfo
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- CN117628086A CN117628086A CN202210949498.0A CN202210949498A CN117628086A CN 117628086 A CN117628086 A CN 117628086A CN 202210949498 A CN202210949498 A CN 202210949498A CN 117628086 A CN117628086 A CN 117628086A
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- 230000007246 mechanism Effects 0.000 claims abstract description 98
- 238000006243 chemical reaction Methods 0.000 claims abstract description 43
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims description 2
- 210000000078 claw Anatomy 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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Abstract
The invention discloses an electric control brake caliper, which comprises an inner brake pad assembly, a motion conversion mechanism and an adjusting mechanism, wherein the motion conversion mechanism comprises a rotating part and a translation part, the adjusting mechanism comprises a piston, and the electric control brake caliper further comprises a piston return mechanism which is connected with the translation part and the piston and is used for controlling the piston to return automatically. According to the electric control brake caliper, the return mechanism is arranged to directly drive the piston to return, so that dragging can be reduced.
Description
Technical Field
The invention belongs to the technical field of braking systems, and particularly relates to an electric control brake caliper.
Background
When the vehicle runs in a state that the friction plate is not completely separated from the brake disc (clamping residues), the vehicle is called as braking drag (commonly called drag), the occurrence of drag (commonly called drag) can cause the increase of fuel consumption, meanwhile, the service life of the friction plate is shortened, and the floating type electric control caliper has various factors which can cause the problem of drag: 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, as in the patent document with publication number of CN107076237B, an electric control brake caliper is proposed, a hydraulic braking 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, the piston is directly carried along with the screw nut to return when the screw nut returns, the active return function of the piston is realized, and the return amount of the piston or the disc clearance can be directly controlled. In the patent, an arch-shaped coupling surface is formed between the piston and the screw nut, and the displacement between the piston axis and the ball screw axis can be compensated similarly to the contact form of an arc surface, so that the influence of the deformation of the brake caliper body on the motion conversion mechanism is reduced. However, the problem with this patent is that the impact of the friction plate on the motion conversion mechanism caused by the tangential impact or the friction plate during braking is not considered, in the prior art, the motion conversion mechanism of the EMB system adopts a large number of ball screws, when the output end of the ball screw is subjected to a radial force, a moment for tilting the ball screw around a certain point, called a tilting moment, is generated, the tilting moment can cause the axis of the nut and the screw shaft to deviate, the uneven stress is caused to the balls in the ball screw, and a small number of balls are stressed to deviate greatly, so that the crushing of the balls or the permanent deformation of the raceway are caused.
In summary, the brake calipers in the prior art have the following problems:
1. the brake block sliding resistance, the clamp body sliding resistance and the piston sliding resistance of the clamp can lead to dragging tendency, the dragging problem is difficult to completely eliminate in the prior art, the dragging problem can cause increased fuel consumption, and the service life of the friction plate is shortened;
2. in the prior art of electrically controlled brake calipers, the influence of piston slip resistance on braking drag is eliminated by directly driving a nut or a piston to return through a motion conversion mechanism, 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, so that the internal failure of the motion conversion mechanism is easy to cause.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the invention provides an electronically controlled brake caliper with the aim of reducing drag.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: the electric 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 electric 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 return automatically when braking is released.
The piston return mechanism is arranged in the 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 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.
The elastic piece is a wave spring, a disc spring or a spiral spring and is arranged in the inner cavity of the rotating piece.
The adjusting mechanism is arranged at two ends of the motion conversion mechanism, and the adjusting mechanism is movably connected with the motion conversion mechanism, so that an angle and displacement adjusting space can be formed between the adjusting mechanism and the motion conversion mechanism.
The movable connection formed by the adjusting mechanism and the motion conversion mechanism is a spherical pair, a conical pair or a plane pair.
The adjusting mechanism further comprises a bearing with a centering function, the bearing being arranged between the rotating member and the 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 rotary 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 block, and a return spring is arranged between the bracket and the brake caliper body.
According to the electric control brake caliper, the return mechanism is arranged to directly drive the piston to return, so that dragging can be reduced.
Drawings
The present specification includes the following drawings, the contents of which are respectively:
FIG. 1 is a schematic view of an electronically controlled brake caliper according to a first embodiment of the present invention;
FIG. 2 is a schematic diagram of an electronically controlled brake caliper according to a second embodiment of the present invention;
FIG. 3 is a schematic view of a piston in an embodiment of the present invention;
FIG. 4 is a schematic view of a lead screw nut according to an embodiment of the present invention;
FIG. 5 is a schematic view of a reset mechanism of a clamp body in an embodiment of the present invention;
marked in the figure as:
1. an actuator; 2. a brake caliper body; 3. a motion conversion mechanism; 3a, a rotating member; 3b, a translation member; 4. an adjusting mechanism; 4a, a bearing; 4b, a piston; 4c, a flange; 5. a limit screw; 6. a piston return mechanism; 6a, a connecting piece; 6b, fixing pieces; 6c, an elastic piece; 7. an inner brake pad; 8. a brake disc; 9. an outer brake pad; 10. a bracket; 11. a return spring; 12. anti-rotation boss; 13. an anti-rotation groove; 14. a screw limit groove; 15. a first contact surface; 16. and a second contact surface.
Detailed Description
The following detailed description of the embodiments of the invention, given by way of example only, is presented in the accompanying drawings to aid in a more complete, accurate and thorough understanding of the concepts and aspects of the invention, and to aid in its practice, by those skilled in the art.
As shown in fig. 1 and 2, the invention provides an electric control brake caliper with zero drag, which mainly comprises an actuator 1, a brake 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 adjusting mechanism 4. The motion conversion mechanism 3 comprises a rotating part 3a and a translation part 3b, the adjusting mechanism 4 mainly comprises two parts, one part is arranged at the input end of the motion conversion mechanism 3, movable connection is formed between the brake caliper body 2 and the rotating part 3a, the other part is arranged at the output end of the motion conversion mechanism 3, movable connection is formed between the translation part 3b and the piston 4b, and the movable connection is used for adapting to deformation of the caliper body and eccentric wear of a brake pad.
The brake caliper has the beneficial effects that:
1. the piston 4b has an automatic return function, so that the inner brake pad 7 is separated from the brake disc 8 when the brake is released;
in the invention, a thread raceway is arranged on the inner wall of a translation part 3b, a ball screw pair is formed by the translation part 3b and a rotation part 3a, an anti-rotation structure matched with each other is arranged on the outer wall of the translation part 3b and the inner wall of a piston 4b, the end face of the piston 4b is fixedly connected with an inner brake block 7, and in the prior art, the end face of the piston 4b is fixed with the inner brake block 7 by using an eight-shaped spring, namely, the eight-shaped spring is added between the inner brake block 7 and an outer brake block 9. When the braking is released, the motion conversion mechanism 3 reverses, the piston 4b drives the inner brake pad 7 to synchronously move 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 dragging caused by contact between the inner brake pad 7 and the brake disc 8 is avoided.
2. The caliper body resetting structure is provided, so that the outer brake pad 9 is separated from the brake disc 8 when the brake is released;
in the invention, a splayed spring is added between the inner brake pad 7 and the outer brake pad 9, a reset spring 11 is arranged between the caliper body and the bracket 10, after braking release, the sliding resistance of the brake pad and the sliding resistance of the caliper body are overcome by utilizing the elasticity of the spring, the caliper body is pulled back to the original position, the outer brake pad 9 is ensured to be completely separated from the brake disc 8, and the dragging caused by the contact of the outer brake pad 9 and the brake disc 8 is avoided. The above reset structure belongs to the prior art, and will not be described here in detail.
3. The influence of overturning moment, eccentric wear of a brake block, deformation of a clamp body 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 invention, a double-spherical pair mechanism is formed by the spherical 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 in connection with specific embodiments:
example 1
As shown in fig. 1, 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 converting mechanism 3, a piston return mechanism 6, and an adjusting mechanism 4, the adjusting mechanism 4 including 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 arranged 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, and the speed-reducing torque-increasing mechanism is in gear transmission or worm gear transmission and at least comprises an output gear. The construction of the caliper body 2 and the actuator 1 is as known to the person skilled in the art and will not be described in detail here.
The inner brake block 7 and the outer brake block 9 are arranged in the claw structure of the brake caliper body 2, a splayed spring is arranged between the inner brake block 7 and the outer brake block 9, after braking release, the splayed spring can provide a force for expanding the inner brake block 7 and the outer brake block 9 towards two sides of the brake disc 8 respectively, the inner brake block 7 is attached to the surface of the piston 4b by overcoming the sliding resistance of the brake block and the bracket 10 through the elasticity of the splayed spring, and the outer brake block 9 is attached to the inner surface of the claw of the brake caliper body 2; a return spring 11 is installed between the bracket 10 and the pliers body, and the pliers body is pulled back to the original position when the braking is released, and the above structure of utilizing the spring to return is the prior art, and will not be described herein.
As shown in fig. 1, the motion conversion mechanism includes a rotary member 3a and a translational member 3b, and converts the rotary motion transmitted by the speed reduction and torque increase mechanism into linear motion, and the motion conversion mechanism 3 may be a ball screw pair, a slide screw pair, or the like. In the embodiment, the motion conversion mechanism is a ball screw pair, the rotating piece 3a is a screw shaft and is provided with an outer spiral rollaway nest, the translation piece 3b is a screw nut, the screw nut is provided with an inner spiral rollaway nest matched with the outer spiral rollaway nest of the screw shaft, the screw nut is externally matched with a piston 4b, the screw nut is provided with an anti-rotation groove 13, and the piston 4b is provided with an anti-rotation boss 12; the piston 4b and the inner brake pad 7 are adjacently arranged, and the end face of the piston 4b is fixedly connected with the inner brake pad 7.
As shown in fig. 1, the piston return mechanism 6 is disposed in the cavity of the motion converting 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 the 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 translating 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, and the rod portion passes through a through hole at the center of the end faces of the translation member 3b and the piston 4b and is inserted into the inner cavity of the rotation member 3 a. The flange portion is located outside the piston 4b, and the size of the flange portion is larger than the diameter of the through hole at the center of the end face of the piston 4b, and the end face of the flange portion is in contact with the end face of the piston 4b, so that the connecting piece 6a can be used to pull the piston 4b toward a position away from the brake disc 8 when the piston 4b returns. The fixing member 6b is located in the inner cavity of the rotating member 3a, the fixing member 6b is fixedly provided on the lever portion, the flange portion is fixedly connected with one end of the lever portion in the length 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 this embodiment, the connecting piece 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 the 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 a mode of thread compound, 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 located between the fixed piece 6b and the translation piece 3b, one end of the elastic piece is connected with the fixed piece 6b, the other end of the elastic piece is connected with the translation piece 3b, and the piston 4b is kept in an abutting state with the translation piece 3b all the time under the action of the piston return mechanism 6.
When the brake calipers apply braking, the motor rotates positively to drive the speed-reducing and moment-increasing mechanism, the speed-reducing and moment-increasing driving rotating piece 3a rotates, 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 block 7 and the outer brake block 9, so that the inner brake block 7 and the outer brake block 9 are contacted and pressed with the brake disc 8, and braking force is generated.
When the brake caliper releases the brake, the motor reversely drives the speed-reducing and moment-increasing mechanism, the speed-reducing and moment-increasing 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 block 7 under the action of the piston return mechanism 6, and the piston 4b is kept close to the translation piece 3b, so that the brake is released.
As shown in fig. 1, the adjusting mechanism 4 is divided into two parts, namely a piston 4b and a bearing 4a with a aligning function, the bearing 4a is positioned in a cylinder hole of the brake caliper body 2, the bearing 4a is a thrust aligning roller bearing, the bearing 4a is arranged at the input end of the motion converting mechanism 3, the bearing 4a is arranged at a shaft shoulder position of the rotating member 3a, a spherical structure is arranged in the thrust aligning roller bearing, and the spherical structure is equivalent to forming a spherical pair between the brake 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 part 3b is of a spherical structure, and another spherical pair is formed between the translation part 3b and the piston 4b and used for adjusting the eccentric wear of the brake block.
As shown in fig. 1, 3 and 4, a first contact surface 15 is disposed on the piston 4b, a second contact surface 16 is disposed on the translation member 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, that is, the axes of the translation member 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 translation member 3 b.
The brake caliper of the embodiment adopts a double-spherical-surface pair mechanism, can eliminate the influence of overturning moment, eccentric wear of a brake block, deformation of a caliper body and the like on the motion conversion mechanism 3, protects the internal strength of the motion conversion mechanism 3, and prolongs the service life of the motion conversion mechanism.
As shown in fig. 1, 3 and 4, an anti-rotation groove 13 is provided on the rotary member 3a, an anti-rotation boss 12 is provided on the piston 4b, and the anti-rotation boss 12 is embedded in the anti-rotation groove 13. The rotation preventing boss 12 is provided on the inner wall surface of the piston 4b, the length of the rotation preventing boss 12 is smaller than the length of the rotation preventing groove 13, and the rotation preventing boss 12 prevents the piston 4b from rotating relative to the translation member 3 b. The brake caliper body 2 is provided with a limit screw 5, the outer wall of the piston 4b is provided with a screw limit groove 14, the screw limit groove 14 extends along the axial direction of the translation part 3b, the limit screw 5 is inserted into the screw limit groove 14 and used for preventing the translation part 3b from rotating along with the rotation part 3a, and the rotation part 3a can drive the translation part 3b to linearly move along the axial direction when rotating.
Embodiment two:
as shown in fig. 2, the structure of the brake caliper provided in this embodiment is different from that 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, a spherical pair being formed between the flange and the rotating 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 part 3b is of a spherical structure, and another spherical pair is formed between the translation part 3b and the piston 4b and used for adjusting the eccentric wear of the brake block.
As shown in fig. 2, the flange is sleeved on the rotating member 3a, the flange is positioned in the cylinder hole of the brake caliper body 2, a thrust needle bearing is arranged between the flange and the brake 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 disposed on the piston 4b, a second contact surface 16 is disposed on the translation member 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, that is, the axes of the translation member 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 translation member 3 b.
As shown in fig. 2, a third contact surface is disposed on the rotating member 3a, a fourth contact surface is disposed on the flange, 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 axes of the third contact surface and the fourth contact surface, that is, the axes 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, and will not be described here.
The invention is described above by way of example with reference to the accompanying drawings. It will be clear that the invention is not limited to the embodiments described above. As long as various insubstantial improvements are made using the method concepts and technical solutions of the present invention; or the invention is not improved, and the conception and the technical scheme are directly applied to other occasions and are all within the protection scope of the invention.
Claims (13)
1. The electric 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 part and a translation part, and the adjusting mechanism comprises a piston and is characterized in that: the electric control brake caliper further comprises a piston return mechanism which is connected with the translation piece and the piston and used for controlling the piston to return automatically when braking is released.
2. An electronically controlled brake caliper according to claim 1, wherein: the piston return mechanism is arranged in the 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 electronically controlled brake caliper according to claim 2, wherein: the connecting piece passes 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 electronically controlled brake caliper according to claim 2, wherein: the elastic piece is a wave spring, a disc spring or a spiral spring and is arranged in the inner cavity of the rotating piece.
5. Electronically controlled brake calliper according to any of claims 1-4, wherein: the adjusting mechanism is arranged at two ends of the motion conversion mechanism, and the adjusting mechanism is movably connected with the motion conversion mechanism, so that an angle and displacement adjusting space can be formed between the adjusting mechanism and the motion conversion mechanism.
6. The electronically controlled brake caliper according to claim 5, wherein: the movable connection formed by the adjusting mechanism and the motion conversion mechanism is a spherical pair, a conical pair or a plane pair.
7. The electronically controlled brake caliper according to claim 5, wherein: the adjusting mechanism further comprises a bearing with a centering function, the bearing being arranged between the rotating member and the caliper body.
8. The electronically controlled brake caliper of claim 7, wherein: the bearing is a thrust self-aligning roller bearing or a self-aligning roller bearing.
9. The electronically 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. The electronically controlled brake caliper according to claim 5, wherein: the piston is of a spherical structure, and a spherical pair is formed between the piston and the translation piece.
11. Electronically controlled brake calliper according to any of claims 1-4, wherein: the rotary 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. Electronically controlled brake calliper according to any of claims 1-4, wherein: the brake caliper further comprises a brake caliper body and a bracket, wherein a return spring is arranged between the bracket and the brake caliper body.
13. Electronically controlled brake calliper according to any of claims 1-4, wherein: the end face of the piston is fixedly connected with the inner brake block, and a return spring is arranged between the bracket and the brake caliper body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210949498.0A CN117628086A (en) | 2022-08-09 | 2022-08-09 | Electric control brake caliper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210949498.0A CN117628086A (en) | 2022-08-09 | 2022-08-09 | Electric control brake caliper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117628086A true CN117628086A (en) | 2024-03-01 |
Family
ID=90022103
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210949498.0A Pending CN117628086A (en) | 2022-08-09 | 2022-08-09 | Electric control brake caliper |
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| Country | Link |
|---|---|
| CN (1) | CN117628086A (en) |
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2022
- 2022-08-09 CN CN202210949498.0A patent/CN117628086A/en active Pending
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