Shell assembly, brake caliper and vehicle

Abstract

The utility model discloses a shell assembly, a brake caliper and a vehicle, the shell assembly is used for the brake caliper, the shell assembly comprises a shell and a magnetic part, a mounting hole is defined in the shell, and the mounting hole is suitable for containing a piston; the magnetic part is arranged in the shell and suitable for generating a magnetic field in the mounting hole, and the magnetic field is suitable for driving the piston to move in the axial direction of the mounting hole relative to the shell. By arranging the shell and the magnetic piece, the magnetic piece is arranged in the shell and generates the magnetic field in the mounting hole, so that the piston in the mounting hole is driven by the magnetic field generated by the magnetic piece to move relative to the shell, and the braking dragging time can be shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a housing component, a brake caliper and a vehicle. Background Art

[0002] Vehicle brake calipers generally include a housing assembly, a hydraulic cylinder, brake pads and brake discs. The brake disc is fixed to the wheel and rotates with the wheel, and the brake pad is connected to the piston of the brake caliper. When the brake pedal on the vehicle beam is stepped on, the brake fluid in the hydraulic cylinder pushes the piston, and the piston presses and pushes the brake pad to contact the brake disc to generate friction braking, thereby stopping the vehicle.

[0003] After releasing the vehicle's brake pedal, the vehicle's brakes cannot be released immediately or completely, and there is a brake drag. Utility Model Content

[0004] The utility model aims to provide a housing component, a brake caliper and a vehicle, so as to solve the problem of brake dragging of the vehicle.

[0005] In order to achieve the purpose of the utility model, the utility model provides the following technical solutions:

[0006] In a first aspect, the utility model provides a housing assembly for a brake caliper, the housing assembly comprising a housing and a magnetic component, the housing enclosing a mounting hole, the mounting hole being suitable for accommodating a piston; the magnetic component is disposed in the housing, the magnetic component being suitable for generating a magnetic field in the mounting hole, and the magnetic field being suitable for driving the piston to move axially relative to the housing along the mounting hole.

[0007] In one embodiment, a mounting groove is formed on the inner wall of the mounting hole, and the magnetic member is received in the mounting groove.

[0008] In one embodiment, the magnetic member extends along the circumference of the mounting hole and is connected end to end to form a ring shape, or there are multiple magnetic members, and the multiple magnetic members are arranged at intervals in the circumference of the mounting hole.

[0009] In one embodiment, there are a plurality of magnetic members, and the plurality of magnetic members are spaced apart along the radial direction and / or the axial direction of the mounting hole.

[0010] In one embodiment, the magnetic member is a coil, and the coil is suitable for being electrically connected to a control member of the brake caliper.

[0011] In a second aspect, the utility model further provides a brake caliper, comprising a piston, a brake pad and a housing assembly as described in any one of the various embodiments of the first aspect, wherein the piston is accommodated in the mounting hole and is suitable for moving relative to the housing in the axial direction of the mounting hole, at least a portion of the piston is a ferromagnetic component, and the brake pad is connected to the piston; the brake pad is suitable for abutting against a brake disc, and the magnetic component is suitable for generating a magnetic field in the mounting hole, and the magnetic field drives the piston to move relative to the housing along the axial direction of the mounting hole to separate the brake pad from the brake disc.

[0012] In one embodiment, the piston is a ferromagnetic component, or a ferromagnetic component is disposed on the periphery and / or inside of the piston, and the ferromagnetic component is made of black iron material.

[0013] In one embodiment, the piston comprises a first end remote from the brake pad, and the ferromagnetic member is closer to the brake pad than the first end.

[0014] In one embodiment, there are a plurality of ferromagnetic components, and the plurality of ferromagnetic components are arranged on the piston at intervals along the axial direction of the mounting hole.

[0015] In one embodiment, the housing assembly also includes an oil seal, an inner wall of the mounting hole is provided with an oil seal groove, the oil seal is accommodated in the oil seal groove and is suitable for abutting against the piston, and in the axial direction of the mounting hole, the magnetic part is closer to the brake pad than the oil seal.

[0016] In a third aspect, the utility model further provides a vehicle, comprising a brake disc and a brake caliper as described in any one of the various embodiments of the second aspect, wherein the brake caliper is suitable for abutting against or separating from the brake disc.

[0017] By providing a shell and a magnetic component, the magnetic component is arranged in the shell and generates a magnetic field in the mounting hole, so that the piston in the mounting hole moves relative to the shell under the drive of the magnetic field generated by the magnetic component, the brake drag time can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 is a cross-sectional view of a brake caliper of an embodiment;

[0020] Figure 2is a cross-sectional view of a brake caliper according to another embodiment.

[0021] Description of reference numerals:

[0022] 100-brake caliper;

[0023] 10-piston, 11-ferromagnetic member, 12-first end, 13-cavity;

[0024] 20-brake pad, 21-connecting part, 22-friction layer;

[0025] 30 - housing assembly, 31 - housing, 311 - mounting hole, 312 - mounting groove, 313 - oil seal groove, 32 - magnetic part, 33 - oil seal; 40 - hydraulic chamber. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there can be a central component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there can be a central component at the same time.

[0028] Unless otherwise defined, all technical and scientific terms used in this utility model have the same meaning as those commonly understood by technicians in the technical field of this utility model. The terms used in the specification of this utility model are only for the purpose of describing specific embodiments and are not intended to limit this utility model. The term "and / or" used in this utility model includes any and all combinations of one or more related listed items.

[0029] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0030] An embodiment of the utility model provides a vehicle, comprising a brake disc and a brake caliper in the embodiment of the utility model, wherein the brake caliper is suitable for abutting against or separating from the brake disc.

[0031] Optionally, the vehicle may be an electric vehicle, a gasoline vehicle, or a gasoline-electric hybrid vehicle, and the vehicle may be a sedan, an off-road vehicle, etc. The vehicle may be divided into mini vehicles, light vehicles, mid-size vehicles, and high-end vehicles, etc. according to the displacement of the engine, and there is no specific limitation.

[0032] Optionally, the vehicle includes a body. The body is a material with high structural strength, specifically metal material, high-strength plastic, ceramic, carbon fiber, etc., and metal materials are aluminum, aluminum alloy, magnesium alloy, iron and iron alloy, etc. The body is a split structure, and multiple parts are connected and fixed by welding, bonding, clamping, screwing, etc.

[0033] Optionally, the vehicle further includes wheels, which are connected to the vehicle body. The brake disc is fixedly connected to the wheel and rotates with the wheel. The connection between the brake disc and the wheel can be welding, bonding, clamping, screwing, etc., without specific limitation.

[0034] Optionally, the brake caliper is suitable for connection with the vehicle body, and the connection between the brake caliper and the wheel may be welding, bonding, clamping, screwing, etc., without specific limitation.

[0035] Optionally, the brake caliper includes a brake pad. When the vehicle is braking, the brake caliper is adapted to move toward the brake disc, so that the brake pad of the brake caliper and the brake disc are pressed against each other, and the brake is applied by the friction between the brake pad and the brake disc. In the prior art, the return speed of the brake pad is slow after the brake is released, and the brake pad will still rub against the brake disc to cause drag during normal driving after the brake is released.

[0036] The vehicle in the embodiment of the utility model can solve the problem of brake drag when the vehicle releases the brakes by adopting the brake caliper in the embodiment of the utility model.

[0037] Please refer to Figure 1 The embodiment of the utility model further provides a brake caliper 100, which includes a piston 10, a brake pad 20 and a housing assembly 30 in the embodiment of the utility model.

[0038] Define the direction first. Please refer to Figure 1 , X is the first direction.

[0039] Optionally, the brake pad 20 is connected to the piston 10 by welding, bonding, clamping, screwing, etc., without specific limitation.

[0040] Optionally, the brake pad 20 includes a connecting portion 21 and a friction layer 22, wherein the connecting portion 21 is connected to the piston 10, and the friction layer 22 is disposed on a side of the connecting portion 21 facing away from the piston 10. The friction layer 22 is made of a friction material commonly used in the art, and contacts the brake disc during braking to generate friction.

[0041] Optionally, the piston 10 is received in the housing assembly 30 and is adapted to move relative to the housing assembly 30 in a first direction X. The piston 10 moves to drive the brake pad 20 to abut against or separate from the brake disc.

[0042] Optionally, the shape of the piston 10 can be block-shaped, column-shaped, etc., which is not specifically limited. A cavity 13 is provided inside the piston 10 to reduce the weight of the piston 10 itself and facilitate the movement of the piston 10 relative to the housing assembly 30.

[0043] Optionally, the brake caliper 100 is further provided with a hydraulic chamber 40, which is provided on a side of the housing assembly 30 away from the brake pad 20. The hydraulic chamber 40 is used to contain brake fluid, and the brake fluid pushes the piston 10 to drive the brake pad 20 toward the brake disc during braking, so that the brake pad 20 abuts against the brake disc for braking.

[0044] The brake caliper 100 in the embodiment of the present utility model can solve the problem of brake drag when the vehicle releases the brake by adopting the housing assembly 30 in the embodiment of the present utility model.

[0045] The housing assembly 30 in the embodiment of the present utility model is described in detail below.

[0046] Please refer to Figure 1 The utility model provides a housing assembly 30, and the housing assembly 30 is used for a brake caliper 100. The housing assembly 30 includes a housing 31 and a magnetic member 32, and the housing 31 encloses a mounting hole 311, and the mounting hole 311 is suitable for accommodating a piston 10. The magnetic member 32 is arranged in the housing 31, and the magnetic member 32 is suitable for generating a magnetic field in the mounting hole 311, and the magnetic field is suitable for driving the piston 10 to move relative to the housing 31 along the axial direction of the mounting hole 311.

[0047] Optionally, the material of the shell assembly 30 may be metal material, high-strength plastic, ceramic, etc. The metal material may be, for example, aluminum, aluminum alloy, magnesium alloy, iron, iron alloy, etc., without specific limitation.

[0048] Optionally, the housing 31 may be an integrated structure, that is, the housing 31 is an integrated structure made by an integrated molding process, and the integrated molding process may be stamping, casting, etc. The housing 31 may also be a split structure, and the various parts of the housing 31 may be connected and fixed by welding, bonding, clamping, screwing, etc., without limitation.

[0049] Optional, such as Figure 1 As shown, the axis of the mounting hole 311 extends in the first direction X. The cross-sectional shape of the mounting hole 311 in the first direction X can be circular, square, rectangular, polygonal, etc., corresponding to the shape of the piston 10, and is not specifically limited.

[0050] Optionally, the hydraulic chamber 40 is communicated with the mounting hole 311 , and the mounting hole 311 is suitable for accommodating at least part of the piston 10 , and the piston 10 moves axially relative to the housing 31 along the mounting hole 311 , that is, the piston 10 moves along the first direction X relative to the housing 31 .

[0051] Optionally, the magnetic member 32 may be disposed on the surface of the shell 31 or inside the shell 31 , and the magnetic member 32 and the shell 31 may be connected by bonding, snapping, screwing, etc., without specific limitation.

[0052] Optionally, the magnetic member 32 may be a magnet, a coil, or any other commonly used magnetic member 32 in the art suitable for generating magnetic field force, without any specific limitation.

[0053] Brake drag refers to the phenomenon that after the driver completely releases the brake pedal, the car's brakes cannot be released immediately or completely, and there is still a considerable braking force. The normal brake release time of a vehicle is generally 0.2 seconds to 1.5 seconds. If the normal brake release time exceeds this time, it can basically be determined that there is brake drag. GB7258-2012 "Technical Conditions for Safe Operation of Motor Vehicles" requires that the blocking force of each wheel should not exceed 10% of the wheel load, and is usually stipulated to be no more than 5N*m (Newton*meter).

[0054] In the prior art, a common structure for reducing brake drag is to use a rubber ring to return, or to add a return spring elastic mechanism to the brake caliper 100, so that the brake pad 20 generates an elastic force opposite to the clamping brake disc, thereby making the brake pad 20 move away from the brake disc and reducing the drag force. Due to the limitations of factors such as the materials of the rubber ring and the spring, the return force generated is limited. After a long period of action, the rubber ring and the spring will also decay or break, and finally lose the effect of reducing drag.

[0055] The housing assembly 30 in the embodiment of the utility model is provided with a housing 31 and a magnetic component 32. The magnetic component 32 is arranged in the housing 31 and generates a magnetic field in the mounting hole 311, so that the piston 10 in the mounting hole 311 moves relative to the housing 31 under the driving force of the magnetic field generated by the magnetic component 32, thereby reducing the braking drag time.

[0056] Optional, such as Figure 1 As shown, the inner wall of the mounting hole 311 is provided with a mounting groove 312, and the magnetic member 32 is received in the mounting groove 312. Optionally, the central axis of the mounting hole 311 extends along the first direction X. The rotational symmetry of the mounting hole 311 can be axial symmetry or central symmetry, without limitation.

[0057] Optionally, the mounting groove 312 can be opened along the circumference of the mounting hole 311 and connected end to end to form a ring shape, or there are multiple mounting grooves 312, and multiple mounting grooves 312 are arranged at intervals in the circumference of the mounting hole 311, or the mounting groove 312 is arranged along the axial direction of the mounting hole 311. All of the above methods are possible and are not specifically limited.

[0058] Optionally, the size of the installation slot 312 may correspond to the magnetic member 32 , and there is no specific limitation.

[0059] By arranging the magnetic member 32 to be received in the mounting groove 312 opened on the inner wall of the mounting hole 311 , the position of the magnetic member 32 can be fixed to generate a stable electromagnetic force.

[0060] Optionally, the magnetic member 32 extends along the circumference of the mounting hole 311 and is connected end to end to form a ring shape, or there are multiple magnetic members 32, and the multiple magnetic members 32 are arranged at intervals in the circumference of the mounting hole 311.

[0061] Optionally, the mounting groove 312 is opened along the circumference of the inner wall surface of the mounting hole 311, and the magnetic component 32 is received in the mounting hole 311 and connected end to end; or, a plurality of mounting grooves 312 are spaced apart circumferentially on the inner wall surface of the mounting hole 311, and a plurality of magnetic components 32 are received in the mounting grooves 312 one by one, without specific limitation.

[0062] By arranging the magnetic member 32 to extend along the circumference of the mounting hole 311 and connect end to end to form a ring shape, or by arranging multiple magnetic members 32 at circumferential intervals in the mounting hole 311, the generated magnetic field is relatively stable and uniform. The magnetic member 32 can generate a magnetic field in the mounting hole 311, so that the piston 10 in the mounting hole 311 moves relative to the housing 31 under the action of the magnetic field generated by the magnetic member 32, thereby reducing the drag time.

[0063] Optionally, there are multiple magnetic members 32 , and the multiple magnetic members 32 are spaced apart along the radial direction and / or axial direction of the mounting hole 311 .

[0064] Optionally, a plurality of magnetic members 32 are arranged at intervals along the radial direction of the mounting hole 311, that is, from the central axis of the mounting hole 311 to the outer periphery, so that the magnetic force is enhanced, the magnetic field force generated is larger, and the effect of reducing drag is good.

[0065] Alternatively, the axial direction of the mounting hole 311 is along the first direction X, and the plurality of magnetic members 32 are arranged at intervals along the axial direction of the mounting hole 311 , so that the magnetic force is enhanced, the generated magnetic field force is larger, and the effect of reducing the drag time is better.

[0066] Alternatively, a plurality of magnetic members 32 are spaced apart along the radial direction and the axial direction of the mounting hole 311 . The above methods are all acceptable and are not specifically limited.

[0067] By arranging a plurality of magnetic parts 32, and the plurality of magnetic parts 32 are spaced apart along the radial and / or axial direction of the mounting hole 311, the magnetic part 32 can generate a magnetic field in the mounting hole 311, so that the piston 10 in the mounting hole 311 moves relative to the housing 31 under the action of the magnetic field generated by the magnetic part 32, thereby reducing the braking drag time.

[0068] Optionally, the magnetic member 32 is a coil, and the coil is suitable for being electrically connected to a control member (not shown in the figure) of the brake caliper 100 .

[0069] Optionally, the coil is a commonly used coil in the art, and is not specifically limited. One end of the coil is electrically connected to the positive pole of the control component, and the other end is electrically connected to the negative pole of the control component. The control component can control the on / off of the coil and control the current of the coil to control the electromagnetic force generated by the coil.

[0070] Optionally, the coil is wound around the housing assembly 30 , and the coil wire diameter and the number of winding turns of the coil can be determined according to the size of the piston 10 , and are not specifically limited.

[0071] Optionally, in one embodiment, during braking, the piston 10 drives the brake pad 20 to move along the first direction X toward the brake disc under the push of the brake fluid, so that the brake pad 20 abuts against the brake disc for braking, and the coil is not energized, which will not affect the braking effect; when the brake is released, the control component controls the coil to pass a 12V voltage of 0.2s-1.5s, so that the coil is charged to generate electromagnetic force, so as to drive the piston 10 to move along the first direction X away from the brake disc, thereby driving the brake pad 20 to separate from the brake disc.

[0072] Alternatively, in another embodiment, during braking, the control component controls the coil to be energized and generates an electromagnetic force toward the brake disc, which together with the driving force of the brake fluid causes the piston 10 to move toward the brake disc; during braking release, the control component controls the coil to be energized and generates an electromagnetic force toward the hydraulic chamber 40, driving the piston 10 to move away from the brake disc, thereby driving the brake pad 20 to separate from the brake disc.

[0073] By setting the magnetic part 32 as a coil, the coil is electrically connected to the control part of the brake caliper 100. The control part can control the on / off of the coil and the current in the coil to control the size and direction of the electromagnetic force generated by the coil. The size and direction of the electromagnetic force generated in the mounting hole 311 can be controlled to better promote the movement of the piston 10 and shorten the drag time.

[0074] Optional, such as Figure 1 As shown, the housing assembly 30 further includes an oil seal 33. The inner wall of the mounting hole 311 is provided with an oil seal groove 313. The oil seal 33 is received in the oil seal groove 313 and abuts against the piston 10. In the axial direction of the mounting hole 311, the magnetic member 32 is closer to the brake pad 20 than the oil seal 33.

[0075] Optionally, the oil seal 33 is a commonly used oil seal 33 in the art, and its material can be nitrile rubber, silicone rubber, polytetrafluoroethylene, etc., without specific limitation. The oil seal 33 is suitable for elastically contacting with the surface of the piston 10 to prevent the brake fluid from leaking.

[0076] Optionally, the inner wall of the mounting hole 311 is provided with oil seal grooves 313 connected end to end along the circumferential direction, and the oil seal grooves 313 are suitable for accommodating the oil seal 33. The connection between the oil seal 33 and the inner wall of the oil seal groove 313 can be bonding, clamping, etc., which is not specifically limited.

[0077] By setting the housing assembly 30 to also include an oil seal 33, the oil seal 33 is arranged in the housing 31, and in the axial direction of the mounting hole 311, the magnetic component 32 is closer to the brake pad 20 than the oil seal 33. The oil seal 33 can prevent the brake fluid in the hydraulic chamber 40 from entering the space on the side of the mounting hole 311 located away from the hydraulic chamber 40 when the piston 10 moves, thereby preventing the brake fluid from contaminating the magnetic component 32.

[0078] Optionally, at least a portion of the piston 10 is a ferromagnetic component 11 .

[0079] Optionally, a ferromagnetic component 11 is disposed on the periphery and / or inside of the piston 10 , and the ferromagnetic component 11 is made of black iron material.

[0080] Optional, such as Figure 2 As shown, a fixing groove (not shown in the figure) is opened on the outer peripheral surface of the piston 10, and the ferromagnetic component 11 is received in the fixing groove of the piston 10. The connection method between the ferromagnetic component 11 and the inner wall of the fixing groove can be bonding, clamping, etc.

[0081] Alternatively, the ferromagnetic component 11 is accommodated in the cavity 13 of the piston 10. All of the above methods are acceptable and are not specifically limited.

[0082] Optionally, when the piston 10 is made of non-ferromagnetic material, such as ceramic, stainless steel, etc., a ferromagnetic component 11 may be provided on the periphery and / or inside of the piston 10, and the ferromagnetic component 11 is made of black iron material to ensure that the piston 10 can move under the action of the electromagnetic force generated by the magnetic member 32. Alternatively, the piston 10 is made of a ferromagnetic material, and the piston 10 is the ferromagnetic component 11.

[0083] Optionally, the ferromagnetic component 11 may be disposed along the outer circumference of the piston 10 and connected end to end to form a ring shape, or there may be a plurality of ferromagnetic components 11 , which are disposed at intervals in the circumferential direction of the piston 10 .

[0084] By configuring the piston 10 as a ferromagnetic component 11, or configuring the periphery and / or interior of the piston 10 with a ferromagnetic component 11, the ferromagnetic component 11 is driven by the electromagnetic force generated by the magnetic element 32 to drive the piston 10 to move relative to the housing 31, thereby reducing the drag time.

[0085] Optional, such as Figure 2 As shown, the piston 10 includes a first end 12 far away from the brake pad 20 , and the ferromagnetic member 11 is closer to the brake pad 20 than the first end 12 .

[0086] Optionally, the first end 12 of the piston 10 is adapted to face the hydraulic chamber 40. The ferromagnetic component 11 is away from the hydraulic chamber 40. On the one hand, it is not easy to contact the brake fluid in the hydraulic chamber 40, reducing the possibility of contamination. On the other hand, it is easy to determine the direction of the magnetic field generated by the magnetic component 32 when it is energized, so that the piston 10 moves relative to the housing 31 under the drive of the magnetic field generated by the magnetic component 32, reducing the drag time.

[0087] Optionally, there are multiple ferromagnetic components 11 , and the multiple ferromagnetic components 11 are arranged at intervals along the axial direction of the mounting hole 311 .

[0088] Optionally, by arranging a plurality of ferromagnetic components 11 at intervals along the first direction X, the electromagnetic force exerted on the piston 10 during the brake release process can be increased, so that the piston 10 moves away from the brake disc more quickly, thereby reducing the brake drag time.

[0089] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship of terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" are based on the orientation or positional relationship described in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0090] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. A housing assembly for a brake caliper, characterized in that: include: A housing enclosing a mounting hole, wherein the mounting hole is suitable for accommodating a piston; A magnetic component is disposed in the housing, and the magnetic component is suitable for generating a magnetic field in the mounting hole, and the magnetic field is suitable for driving the piston to move relative to the housing along the axial direction of the mounting hole.

2. The housing assembly according to claim 1, characterized in that: Mounting hole: An inner wall of the mounting hole is provided with a mounting groove, and the magnetic component is received in the mounting groove.

3. The housing assembly according to claim 1, characterized in that: The magnetic member extends along the circumference of the mounting hole and is connected end to end to form a ring shape, or there are multiple magnetic members, and the multiple magnetic members are arranged at intervals in the circumference of the mounting hole.

4. The housing assembly according to claim 1, characterized in that: There are multiple magnetic parts, and the multiple magnetic parts are arranged at intervals along the radial direction and / or axial direction of the mounting hole.

5. The housing assembly according to claim 1, characterized in that: The magnetic component is a coil, and the coil is suitable for being electrically connected to a control component of the brake caliper.

6. A brake caliper, characterized in that: It comprises a piston, a brake pad and a shell assembly as described in any one of claims 1 to 5, wherein the piston is received in the mounting hole and is suitable for moving relative to the shell in the axial direction of the mounting hole, at least a part of the piston is a ferromagnetic component, and the brake pad is connected to the piston; the brake pad is suitable for abutting against a brake disc, and the magnetic component is suitable for generating a magnetic field in the mounting hole, and the magnetic field drives the piston to move relative to the shell along the axial direction of the mounting hole to separate the brake pad from the brake disc.

7. The brake caliper according to claim 6, characterized in that: The piston is a ferromagnetic component, or a ferromagnetic component is arranged on the periphery and / or inside of the piston.

8. The brake caliper according to claim 6, characterized in that: The piston includes a first end distal from the brake pad, and the ferromagnetic member is closer to the brake pad than the first end.

9. The brake caliper according to claim 6, characterized in that: There are a plurality of ferromagnetic components, and the plurality of ferromagnetic components are arranged on the piston at intervals along the axial direction of the mounting hole.

10. The brake caliper according to any one of claims 6 to 9, characterized in that: The housing assembly also includes an oil seal. An oil seal groove is formed on the inner wall of the mounting hole. The oil seal is accommodated in the oil seal groove and is suitable for abutting against the piston. In the axial direction of the mounting hole, the magnetic member is closer to the brake pad than the oil seal.

11. A vehicle, characterized in that: The invention comprises a brake disc and a brake caliper according to any one of claims 6 to 10, wherein the brake caliper is suitable for abutting against or separating from the brake disc.

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