Brake caliper

Abstract

The application discloses a brake caliper, comprising an executor and a locking mechanism, the executor comprises a first motor and a first transmission mechanism, the locking mechanism comprises a second motor and a second transmission mechanism connected with the second motor and provided with a self-locking function, and a power output part of the second transmission mechanism is engaged with a transmission gear on a power transmission path of the first transmission mechanism in a locking state. The brake caliper provided by the application has the locking function, and when the first motor and the control related thereto fail, the brake disc can still be released in time, so that the situation that the wheels are continuously locked during the driving of the vehicle is avoided.

Description

Technical Field

[0001] This invention belongs to the field of braking system technology, specifically, this invention relates to a brake caliper. Background Technology

[0002] EMB (electronic mechanical brake) uses wheel-end motors for direct drive to achieve service braking and release functions. Usually, a locking mechanism is added to achieve parking function.

[0003] During braking, if the main motor or control circuit of a single caliper suddenly fails, the transmission mechanism itself has resistance, the pressure between the brake pads and the brake disc cannot be fully released, and there is still residual clamping force between the brake pads and the brake disc. This residual clamping force will cause the brake caliper to be in a clamped state, that is, at least one of the four wheels of the vehicle has excessive drag force, which makes it impossible for the vehicle to drive safely and cannot meet the requirements of L3 and above autonomous driving.

[0004] In existing EMB technology, the locking mechanism only has a parking function and does not have the function of releasing residual clamping force. Summary of the Invention

[0005] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention provides a brake caliper that achieves reliable locking while simultaneously releasing the brake disc in a timely manner.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a brake caliper, including an actuator and a locking mechanism. The actuator includes a first motor and a first transmission mechanism. The locking mechanism includes a second motor and a second transmission mechanism connected to the second motor and having a self-locking function. When locked, the power output component of the second transmission mechanism meshes with a transmission gear on the power transmission path of the first transmission mechanism.

[0007] The power output component of the second transmission mechanism is a semi-enclosed gear, which has a toothed area with evenly distributed protruding teeth and a toothless area without protruding teeth.

[0008] The second transmission mechanism includes a worm gear connected to the second motor, and the worm gear meshes with the power output component.

[0009] The second transmission mechanism includes a worm gear connected to the second motor and a worm wheel meshing with the worm gear, the worm wheel being connected to the power output component.

[0010] The brake caliper also includes a positioning mechanism for determining the initial position of the power output component.

[0011] The positioning mechanism includes a limiting pin and a limiting spring that cooperates with the limiting pin. The limiting spring has a positioning groove that allows the limiting pin to be inserted when the power output component is in the initial position.

[0012] The brake caliper also includes a gear housing, on which a guide groove is provided for the insertion of the limiting pin, and the limiting spring is located in the guide groove.

[0013] The limiting pin is movably disposed on the power output component or on a worm gear coaxially disposed with the power output component. The power output component or the worm gear coaxially disposed with the power output component is provided with a mounting hole for accommodating the limiting pin, and an elastic element for applying an elastic force to the limiting pin is disposed in the mounting hole.

[0014] The limiting pin is fixedly set on the power output component or the worm wheel connected to the power output component. An elastic element is set on the power output component or the worm wheel coaxially arranged with the power output component on the other side of the guide groove. The elastic element applies an elastic force to the power output component or the worm wheel coaxially arranged with the power output component. A gasket is set between the elastic element and the power output component or the worm wheel coaxially arranged with the power output component.

[0015] The power output component of the second transmission mechanism is a rack and pinion.

[0016] The second transmission mechanism includes a self-locking transmission mechanism connected to the second motor, and the self-locking transmission mechanism is connected to the power output component.

[0017] The self-locking transmission mechanism is a lead screw and nut mechanism.

[0018] The self-locking transmission mechanism is connected to the second motor through a third transmission mechanism, which includes a meshing driving gear and a driven gear.

[0019] The power output component of the second transmission mechanism meshes with the transmission gear located at the power output end or power input end of the first transmission mechanism.

[0020] The power output component of the second transmission mechanism meshes with the transmission gear located between the power input end and the power output end of the first transmission mechanism.

[0021] The brake caliper of the present invention can reliably lock while releasing the brake disc in a timely manner, and can actively release the brake disc to avoid the continuous wheel lock-up during vehicle braking. Attached Figure Description

[0022] This manual includes the following figures, which illustrate the following:

[0023] Figure 1 This is a partial structural schematic diagram of the brake caliper in Embodiment 1;

[0024] Figure 2 This is a partial structural schematic diagram of the brake caliper in Embodiment 2;

[0025] Figure 3 This is a partial cross-sectional view of the brake caliper;

[0026] Figure 4 This is a structural diagram of the power output component and the positioning mechanism;

[0027] Figure 5 This is a cross-sectional view of the positioning mechanism;

[0028] Figure 6 This is a schematic diagram of the locking mechanism in Embodiment 3;

[0029] Figure 7 This is a partial structural schematic diagram of the brake caliper in Embodiment 4;

[0030] Figure 8 This is a structural diagram of the power output component and the positioning mechanism;

[0031] Figure 9 This is a schematic diagram of the power output component and positioning mechanism in Embodiment 4;

[0032] The diagram is marked as follows:

[0033] 1. Transmission gear; 1a. Transmission gear at the power output end; 1b. Intermediate gear; 1c. Transmission gear at the power input end; 2. Brake caliper assembly; 3. Power output component; 3a. Limit pin; 3b. Elastic element; 3c. Washer; 4. Worm; 5. Worm wheel; 6. Second motor; 7. Bearing; 8. Rotating component; 9. Translation component; 10. Gear housing; 10a. Guide groove; 10b. Limiting spring; 11. Driving gear; 12. Lead screw shaft; 13. Nut; 14. Driven gear. Detailed Implementation

[0034] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, in order to help those skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solutions of the present invention, and to facilitate its implementation.

[0035] Example 1

[0036] like Figure 1As shown, this embodiment provides a brake caliper, including an actuator, a brake caliper assembly 2, an inner brake pad, an outer brake pad, a motion conversion mechanism, and a locking mechanism. The actuator includes a first motor and a first transmission mechanism. The locking mechanism includes a second motor 6 and a second transmission mechanism connected to the second motor 6 and having a self-locking function. The power output component 3 of the second transmission mechanism has a transmission gear 1 that meshes with the power transmission path of the first transmission mechanism when locked.

[0037] like Figure 1 and Figure 3 As shown, the brake caliper assembly 2 is a floating caliper structure with a cylinder bore and a hook structure. An inner brake pad, a brake disc, and an outer brake pad are sequentially installed within the hook structure. The structures of the brake caliper assembly 2, the first motor, and the first transmission mechanism are as known to those skilled in the art. The gear at the power input end of the first transmission mechanism is connected to the first motor, and the transmission gear 1 at the power output end of the first transmission mechanism is connected to the motion conversion mechanism. The motion conversion mechanism includes a rotating component 8 and a translating component 9. The motion conversion mechanism can be a ball screw pair or a sliding screw pair. In this embodiment, the motion conversion mechanism is a ball screw pair, the rotating component 8 is the screw shaft, and the translating component 9 is the piston. The translating component 9 and the rotating component 8 form a ball screw pair. The inner wall of the translating component 9 is provided with an inner helical raceway that matches the outer helical raceway of the rotating component 8, and the end face of the translating component 9 is connected to the inner brake pad.

[0038] like Figure 1 , Figure 3 and Figure 4 As shown, in this embodiment, the power output component 3 of the second transmission mechanism meshes with the transmission gear 1 located at the power output end of the first transmission mechanism. The transmission gear 1 is connected to the rotating component 8, and when the transmission gear 1 rotates, it drives the rotating component 8 to rotate synchronously. The power output component 3 of the second transmission mechanism is a semi-enclosed gear, which has a toothed area with evenly distributed protruding teeth and a toothless area without protruding teeth. The teeth of the semi-enclosed gear do not cover the entire pitch circle. The protruding teeth of the toothed area of ​​the power output component 3 can mesh with the transmission gear 1, and the power output component 3 can roll along the transmission gear 1 until the toothed area of ​​the power output component 3 disengages from the transmission gear 1. When the second motor 6 is running, the power output component 3 rotates. When the toothed area of ​​the power output component 3 meshes with the transmission gear 1, the power output component 3 can roll along the transmission gear 1. At this time, the power output component 3 can drive the transmission gear 1 to rotate. The transmission gear 1 drives the rotating part 8 to rotate synchronously. The rotating part 8 drives the translation part 9 to move linearly, which can realize the timely release of the brake caliper. After the power output component 3 rotates to a set angle, the toothed area of ​​the power output component 3 disengages from the transmission gear 1. The power output component 3 rotates to the toothless area and corresponds to the transmission gear 1. The power output component 3 can no longer drive the transmission gear 1 to rotate.

[0039] like Figure 1 and Figure 3 As shown, the second transmission mechanism also includes a worm gear 4 connected to the second motor 6. The worm gear 4 meshes with the power output component 3, serving as the power input component of the second transmission mechanism. The first motor and the second motor 6 are fixedly mounted. One end of the worm gear 4 is fixedly connected to the output end of the second motor 6, and the other end of the worm gear 4 is fitted with a bearing 7. The worm gear 4 meshes with the toothed teeth of the power output component 3, and the axis of the power output component 3 is parallel to the axis of the transmission gear 1. The maximum rotation angle of the power output component 3 is 180 degrees. When the vehicle is parked, a portion of the toothed teeth of the power output component 3 meshes with the transmission gear 1, and another portion of the toothed teeth of the power output component 3 meshes with the worm gear 4. The power output component 3 and the worm gear 4 work together to form a second transmission mechanism with a self-locking function, preventing the transmission gear 1 from rotating and the motion conversion mechanism from operating. The multiple toothed teeth of the power output component 3 meshing with the transmission gear 1 increase strength, making the locking mechanism less prone to failure and improving reliability.

[0040] When the first motor fails, the second motor 6 of the locking mechanism operates, which drives the transmission gear 1 through the second transmission mechanism. The transmission gear 1 drives the motion conversion mechanism, enabling the caliper to release the brake disc and preventing the wheels from locking up continuously during vehicle braking.

[0041] like Figure 1 , Figure 4 and Figure 5 As shown, the brake caliper of this embodiment also includes a positioning mechanism for determining the initial position of the power output component 3. The positioning mechanism includes a limiting pin 3a disposed on the power output component 3 and a limiting spring 10b cooperating with the limiting pin 3a. The limiting spring 10b is provided with a positioning groove that allows the limiting pin 3a to be inserted when the power output component 3 is in the initial position.

[0042] like Figure 1 , Figure 4 and Figure 5As shown, the brake caliper of this embodiment also includes a gear housing 10. The gear housing 10 has a guide groove 10a for embedding the limiting pin 3a, and a limiting spring 10b is fixedly disposed in the guide groove 10a. The guide groove 10a is an arc-shaped groove provided on the surface of the gear housing 10. The guide groove 10a is coaxially disposed with the power output component 3. The gear housing 10 is fixed relative to the second motor 6, and the power output component 3 is rotatably disposed on the gear housing 10. The limiting pin 3a is movably disposed on the power output component 3. The power output component 3 has a mounting hole for accommodating the limiting pin 3a, and an elastic element 3b for applying an elastic force to the limiting pin 3a is disposed within the mounting hole. The moving direction of the limiting pin 3a is parallel to the axis of the power output component 3. The mounting hole is a circular groove provided inside the power output component 3. One end of the limiting pin 3a is located in the mounting hole, and the other end of the limiting pin 3a extends out of the mounting hole and contacts the limiting spring 10b.

[0043] like Figure 4 As shown, a screw is installed in the mounting hole, and the screw is threadedly connected to the power output component 3. An elastic element 3b is sandwiched between the screw and the limit pin 3a. The elastic element 3b is a cylindrical helical spring and is a compression spring.

[0044] like Figure 1 , Figure 4 and Figure 5 As shown, the limiting spring 10b has two protrusions on both sides of the positioning groove. The positioning groove is located in the middle of the two protrusions, and the protrusions protrude into the guide groove 10a. The distance between the top of the protrusion and the power output component 3 is less than the distance between the positioning groove and the power output component 3. During the rotation of the power output component 3, it can drive the limiting pin 3a to rotate synchronously, so that the limiting pin 3a can move between the first position a, the second position b, and the third position c. The first position a, the second position b, and the third position c are on the same circumference, and the second position is located between the first position a and the third position c. The main function of the limiting pin 3a is to determine the initial position of the power output component 3. After the limiting pin 3a is embedded in the positioning groove, the limiting pin 3a is in the second position b. The toothed area of ​​the power output component 3 is disengaged from the transmission gear 1, and the two are not meshed. The locking mechanism cannot lock the transmission gear 1. The first position a and the third position c are located at the two ends of the arc length direction of the guide groove 10a, and the included angle between the first position a and the third position c is also the maximum rotation angle of the power output component 3.

[0045] The locking function of the brake caliper in this embodiment is implemented as follows:

[0046] When the vehicle is parked, the first motor runs, and the power is transmitted to the transmission gear 1, which drives the transmission gear 1 to rotate in the first direction. The transmission gear 1 drives the motion conversion mechanism to perform corresponding actions, causing the brake caliper to perform a clamping action. When the predetermined parking clamping force is reached, the second motor 6 drives the worm gear 4 to rotate, and then the worm gear 4 drives the power output component 3 to rotate in the second direction. The teeth of the toothed area of ​​the power output component 3 begin to mesh with the teeth of the transmission gear 1.

[0047] As the power output component 3 begins to rotate, the limiting pin 3a moves from the second position b and contacts the protrusion of the limiting spring 10b. After overcoming the elastic force of the elastic element 3b, the limiting pin 3a moves linearly toward the mounting hole. As the power output component 3 rotates, the limiting pin 3a will pass over the protrusion of the limiting spring 10b.

[0048] The power output component 3 drives the limiting pin 3a to continue moving within the guide groove 10a until the limiting pin 3a moves to the first position a. At this point, the limiting pin 3a contacts the inner wall surface of one end of the guide groove 10a along its arc length, and the power output component 3 stops rotating. After the second motor 6 is de-energized, it stops operating. The toothed area of ​​the power output component 3 simultaneously meshes with the worm gear 4 and the transmission gear 1. The second transmission mechanism has a self-locking function, and the transmission gear 1 is locked, preventing the motion conversion mechanism from operating and achieving the parking lock function.

[0049] The first direction and the second direction are two opposite directions of rotation. For example, if the first direction is counterclockwise, then the second direction is clockwise.

[0050] The emergency release function of the brake caliper in this embodiment is implemented as follows:

[0051] When the vehicle is braking, if the first motor or the circuit controlling the first motor fails, the brake disc and brake pads cannot release on their own or completely due to the rotational resistance of the transmission system itself, causing the brake caliper to remain in a clamped state.

[0052] At this time, the second motor 6 of the locking mechanism is activated. The second motor 6 drives the worm gear 4 to rotate, and then the worm gear 4 drives the power output component 3 to rotate in the first direction. After the toothed area of ​​the power output component 3 begins to mesh with the teeth of the transmission gear 1, the power output component 3 begins to drive the transmission gear 1 to rotate in the second direction. The transmission gear 1 drives the motion conversion mechanism to perform corresponding actions, so that the brake caliper performs a release action and eliminates the clamping force.

[0053] That is, when the main motor or control circuit fails, the second motor comes into play to release the residual force between the brake pads and the brake disc, and the vehicle can still drive normally. With the help of the EMBs of the other three wheels, it can still meet the L3 and above level of autonomous driving functions.

[0054] As the worm gear 5 begins to rotate, the power output component 3 drives the limit pin 3a to move from the second position b. The limit pin 3a contacts the protrusion of the limit spring 10b. After overcoming the elastic force of the elastic element 3b, the limit pin 3a moves linearly toward the mounting hole. As the power output component 3 rotates, the limit pin 3a will pass over the protrusion of the limit spring 10b.

[0055] The power output component 3 drives the limiting pin 3a to continue moving within the guide groove 10a until the limiting pin 3a moves to the third position c. At this point, the limiting pin 3a contacts the inner wall surface of the other end of the guide groove 10a in the arc length direction, and the power output component 3 stops rotating.

[0056] Example 2

[0057] like Figure 2 As shown, the brake caliper in this embodiment differs from that in Embodiment 1 in that the second transmission mechanism further includes a worm 4 connected to the second motor 6 and a worm wheel 5 meshing with the worm 4. The worm wheel 5 is coaxially and fixedly connected to the power output component 3. The worm wheel 5 and the power output component 3 are connected to form a double gear. The worm wheel 5 and the power output component 3 rotate synchronously. After the second motor 6 is turned, the worm 4 drives the worm wheel 5 to rotate, and the worm wheel 5 can drive the power output component 3 to rotate 360 ​​degrees.

[0058] The brake caliper in this embodiment also includes a positioning mechanism for determining the initial position of the power output component 3. The positioning mechanism includes a limit pin 3a and a limit spring 10b that cooperates with the limit pin 3a. The limit pin 3a can be disposed on the power output component 3 or on the worm gear 5 that is coaxially fixedly connected to the power output component 3. In this case, the limit pin 3a is disposed on the power output component 3.

[0059] like Figure 8 As shown, in this embodiment, the guide groove 10a is an annular groove extending circumferentially on the gear housing 10. The guide groove 10a and the power output component 3 are coaxially arranged, and the limiting spring 10b is fixedly arranged in the guide groove 10a. Two protrusions are respectively provided on both sides of the positioning groove on the limiting spring 10b. The positioning groove is located in the middle of the two protrusions, and the protrusions protrude into the guide groove 10a. The distance between the top of the protrusion and the power output component 3 is less than the distance between the positioning groove and the power output component 3. During the rotation of the power output component 3, it can drive the limiting pin 3a to rotate synchronously. The main function of the limiting pin 3a is to determine the initial position of the power output component 3. After the limiting pin 3a is embedded in the positioning groove, it is in its initial position, and the toothed area of ​​the power output component 3 disengages from the transmission gear 1. The two do not mesh, and the locking mechanism cannot lock the transmission gear 1.

[0060] Example 3

[0061] like Figure 6 As shown, the brake caliper in this embodiment differs from those in Embodiments 1 and 2 in that the locking mechanism has a different structure. In this embodiment, the power output component 3 of the second transmission mechanism is a rack and pinion. The second transmission mechanism also includes a self-locking transmission mechanism connected to the second motor 6. The self-locking transmission mechanism has a self-locking function and is connected to the power output component 3.

[0062] In this embodiment, the self-locking transmission mechanism is a lead screw and nut mechanism, which includes a cooperating lead screw shaft 12 and a nut 13. The lead screw shaft 12 and the nut 13 form a helical transmission pair, and the lead screw shaft 12 is fixedly connected to the power output component 3. The nut 13 is coaxially and fixedly connected to the driven gear 14, which meshes with the driving gear 11. The driving gear 11 is fixedly connected to the output end of the second motor 6. The driven gear 14 and the driving gear 11 cooperate to form a third transmission mechanism.

[0063] The locking function of the brake caliper in this embodiment is implemented as follows:

[0064] When the vehicle is parked, the first motor operates, transmitting power to the transmission gear 1, which then rotates in the first direction. The transmission gear 1 drives the motion conversion mechanism to perform corresponding actions, causing the brake calipers to clamp. When the predetermined parking clamping force is reached, the second motor 6 drives the third transmission mechanism, which in turn drives the self-locking transmission mechanism. The lead screw 12 of the self-locking transmission mechanism drives the power output component 3 to move linearly. After the power output component 3 has moved a set distance, it engages with the transmission gear 1, and stops rotating. When the second motor 6 is de-energized, it stops operating. The power output component 3 engages with the transmission gear 1, and the second transmission mechanism, with its self-locking function, locks the transmission gear 1, preventing the motion conversion mechanism from operating and thus achieving the parking lock function.

[0065] The emergency release function of the brake caliper in this embodiment is implemented as follows:

[0066] When the vehicle is braking, if the first motor or the circuit controlling the first motor fails, the brake disc and brake pads cannot release on their own or completely due to the rotational resistance of the transmission system itself, causing the brake caliper to remain in a clamped state.

[0067] At this time, the second motor 6 of the locking mechanism is activated, which drives the third transmission mechanism to operate. The third transmission mechanism drives the self-locking transmission mechanism to operate, and the lead screw 12 of the self-locking transmission mechanism drives the power output component 3 to move linearly. When the power output component 3 meshes with the transmission gear 1, the power output component 3 drives the transmission gear 1 to rotate in the second direction. The transmission gear 1 drives the motion conversion mechanism to perform corresponding actions, causing the brake caliper to release and eliminate the clamping force.

[0068] That is, when the main motor or control circuit fails, the second motor comes into play to release the residual force between the brake pads and the brake disc, and the vehicle can still drive normally, meeting the requirements of L3 and above level autonomous driving functions.

[0069] Example 4

[0070] like Figure 7 As shown, the brake caliper in this embodiment differs from that in Embodiment 2 in the position of the transmission gear. In this embodiment, the power output component 3 of the second transmission mechanism meshes with the transmission gear 1c located at the power input end of the first transmission mechanism. The transmission gear 1c at the power input end of the first transmission mechanism is fixedly connected to the output end of the first motor, and the transmission gear 1a at the power output end of the first transmission mechanism is connected to the motion conversion mechanism.

[0071] The brake caliper in this embodiment also includes a positioning mechanism for determining the initial position of the power output component 3. The positioning mechanism includes a limiting pin 3a and a limiting spring 10b that cooperates with the limiting pin 3a. If the power output component 3 is small, the limiting pin 3a can be fixedly mounted on the power output component 3 or on the worm gear 5 coaxially fixedly connected to the power output component 3; that is, the limiting pin 3a is integrated with the power output component 3 or the worm gear 5. In this case, the limiting pin 3a is integrated into the power output component 3.

[0072] The gear housing 10 is fixed relative to the second motor 6. The double gear, consisting of the power output component 3 and the worm gear 5, is rotatably mounted on the gear shaft of the gear housing 10 and is axially movable. An elastic element 3b is coaxially mounted on the gear shaft of the gear housing 10, applying an elastic force to the double gear consisting of the power output component 3 and the worm gear 5. The elastic element 3b is located on the side away from the limiting pin 3a, and a shim 3c is provided between the elastic element 3b and the worm gear 5.

[0073] As the worm gear 5 begins to rotate, the power output component 3 drives the limiting pin 3a to move from the second position b. The limiting pin 3a contacts the protrusion of the limiting spring 10b. After overcoming the elastic force of the elastic element 3b, the power output component 3 and the worm gear 5 move linearly along the axial direction and rotate simultaneously. The limiting pin 3a will pass over the protrusion of the limiting spring 10b. The power output component 3 drives the limiting pin 3a to continue moving within the guide groove 10a until the locking or emergency release function is completed.

[0074] The power output component 3 of the second transmission mechanism meshes with the transmission gear 1a at the power output end or the transmission gear 1c at the power input end of the first transmission mechanism. Alternatively, the power output component 3 of the second transmission mechanism meshes with the intermediate gear 1b located between the power input end and the power output end of the first transmission mechanism.

[0075] The present 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 to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution; or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A brake caliper, comprising an actuator and a locking mechanism, the actuator comprising a first motor and a first transmission mechanism, characterized in that: The locking mechanism includes a second motor and a second transmission mechanism connected to the second motor and having a self-locking function. When the power output component of the second transmission mechanism is locked, it meshes with a transmission gear on the power transmission path of the first transmission mechanism. The brake caliper also includes a positioning mechanism for determining the initial position of the power output component; The positioning mechanism includes a limiting pin and a limiting spring that cooperates with the limiting pin. The limiting spring has a positioning groove that allows the limiting pin to be inserted when the power output component is in the initial position.

2. The brake caliper according to claim 1, characterized in that: The power output component of the second transmission mechanism is a semi-enclosed gear, which has a toothed area with evenly distributed protruding teeth and a toothless area without protruding teeth.

3. The brake caliper according to claim 2, characterized in that: The second transmission mechanism includes a worm gear connected to the second motor, and the worm gear meshes with the power output component.

4. The brake caliper according to claim 2, characterized in that: The second transmission mechanism includes a worm gear connected to the second motor and a worm wheel meshing with the worm gear, the worm wheel being connected to the power output component.

5. The brake caliper according to claim 1, characterized in that: It also includes a gear housing, on which a guide groove is provided for the insertion of the limiting pin, and the limiting spring is located in the guide groove.

6. The brake caliper according to claim 5, characterized in that: The limiting pin is movably disposed on the power output component or on a worm gear coaxially disposed with the power output component. The power output component or the worm gear coaxially disposed with the power output component is provided with a mounting hole for accommodating the limiting pin, and an elastic element for applying an elastic force to the limiting pin is disposed in the mounting hole.

7. The brake caliper according to claim 6, characterized in that: The limiting pin is fixedly set on the power output component or on the worm gear connected to the power output component. An elastic element is set on the power output component or the worm gear coaxially arranged with the power output component on the other side of the guide groove. The elastic element applies an elastic force to the power output component or the worm gear coaxially arranged with the power output component. A shim is set between the elastic element and the power output component or the worm gear coaxially arranged with the power output component.

8. The brake caliper according to claim 1, characterized in that: The power output component of the second transmission mechanism is a rack and pinion.

9. The brake caliper according to claim 8, characterized in that: The second transmission mechanism includes a self-locking transmission mechanism connected to the second motor, and the self-locking transmission mechanism is connected to the power output component.

10. The brake caliper according to claim 9, characterized in that: The self-locking transmission mechanism is a lead screw and nut mechanism.

11. The brake caliper according to claim 10, characterized in that: The self-locking transmission mechanism is connected to the second motor through a third transmission mechanism, which includes a meshing driving gear and a driven gear.

12. The brake caliper according to any one of claims 1 to 11, characterized in that: The power output component of the second transmission mechanism meshes with the transmission gear located at the power output end or power input end of the first transmission mechanism.

13. The brake caliper according to any one of claims 1 to 11, characterized in that: The power output component of the second transmission mechanism meshes with the transmission gear located between the power input end and the power output end of the first transmission mechanism.

Images