Brake caliper and vehicle

Abstract

The utility model relates to the technical field of vehicle braking, and discloses a brake caliper and a vehicle. A friction block; the caliper support is provided with a containing groove for the friction block to move. A springback assembly; and a groove structure for the rolling body to roll is arranged on the matching surface of the rolling body, the friction block and the caliper bracket. Due to the fact that the brake caliper is provided with the rolling body, when the friction block is subjected to driving force of the caliper body or resilience force of the resilience assembly, the rolling body rolls in the groove structure to drive the friction block to move, rolling friction is achieved between the friction block and the caliper support through the rolling body in the process, and the rolling friction coefficient is far smaller than the sliding friction coefficient. Therefore, the purpose of dragging reduction is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle braking, and particularly relates to a brake caliper and a vehicle. Background Art

[0002] Due to reasons such as design, brake pad wear or poor lubrication, the brake caliper will still generate a certain resistance to the wheel in the non-braking state, resulting in a drag situation. The drag of the brake caliper will reduce fuel economy.

[0003] To solve this problem, in the related art, a spring is arranged to separate the friction block from the brake disc, eliminating the frictional force between the friction block and the brake disc. As Figure 1 shown, the brake caliper assembly includes a caliper body 100, a bracket 101, a friction block 102, a retaining leaf spring 103 and a figure-eight spring 104. The figure-eight spring 104 cooperates with the friction block 102 and the retaining leaf spring 103. When the brake caliper is pressurized, the friction block 102 is pushed to clamp the brake disc to achieve vehicle braking. In this process, the figure-eight spring 104 is compressed elastically deformed; after the brake caliper releases the pressure, the return spring force of the figure-eight spring 104 overcomes the frictional resistance between the friction block 102 and the retaining leaf spring 103, separating the friction block 102 from the brake disc, eliminating the frictional force between the friction block 102 and the brake disc, and reducing the driving resistance. Similarly, as Figure 2 shown, the brake caliper assembly includes a caliper body 200, a bracket 201, a friction block 202 and a main return spring 203. The main return spring 203 cooperates with the friction block 202. When the brake caliper is pressurized, the friction block 202 is pushed to clamp the brake disc to achieve vehicle braking. In this process, the main return spring 203 is compressed elastically deformed. After the brake caliper releases the pressure, the return spring force of the main return spring 203 overcomes the frictional resistance between the friction block 202 and the main return spring 203, separating the friction block 202 from the brake disc and reducing the driving resistance.

[0004] In the above two brake caliper assemblies, the friction block slides and cooperates with the caliper bracket during the working process. The resistance between the friction block and the caliper bracket is sliding friction resistance, and the movement resistance is large, affecting the braking efficiency. Content of the Utility Model

[0005] In view of this, the utility model provides a brake caliper and a vehicle to solve the problem that the sliding friction resistance between the friction block and the caliper bracket is large and the movement resistance is large.

[0006] In a first aspect, the utility model provides a brake caliper, including:

[0007] A caliper body;

[0008] A friction block, which is in transmission connection with the caliper body and can move towards the brake disc direction under the drive of the caliper body to achieve braking;

[0009] A caliper bracket is provided with a receiving groove for the movement of the friction block.

[0010] A return spring assembly is arranged on the caliper bracket and is adapted to provide a return spring force away from the brake disc to the friction block.

[0011] A rolling element, and a groove structure for the rolling of the rolling element is provided on the mating surface between the friction block and the caliper bracket.

[0012] Advantageous effects: Since the rolling element is provided in the brake caliper, when the friction block is subjected to the driving force of the caliper body or the return spring force of the return spring assembly, the rolling element rolls in the groove structure to drive the friction block to move. During this process, rolling friction is achieved between the friction block and the caliper bracket through the rolling element. The rolling friction coefficient is much smaller than the sliding friction coefficient, thereby achieving the purpose of reducing drag or even approaching zero drag, improving the braking efficiency and reducing the energy consumption; moreover, it does not affect the piston return amount and the liquid requirement of the caliper.

[0013] In an alternative embodiment, the groove structure is formed on the bottom side of the friction block and / or the bottom side of the receiving groove.

[0014] Advantageous effects: Compared with the way of being arranged on other mating surfaces, the groove structure is formed on the bottom side of the friction block and / or the bottom side of the receiving groove, and the rolling element is not easily disengaged from the groove structure, which can improve the mating reliability between the rolling element and the friction block and / or the caliper bracket.

[0015] In an alternative embodiment, an embedding groove is provided on the bottom side of the friction block, and a limiting guide groove extending along the moving direction of the friction block is provided on the bottom side of the receiving groove. The embedding groove and the limiting guide groove constitute the groove structure.

[0016] Advantageous effects: By providing an embedding groove on the moving part of the friction block and a limiting guide groove on the fixed part of the caliper bracket, the movement of the friction block is more stable, and it is also convenient to control the movement path of the friction block; moreover, the limiting guide groove restricts the movement of the rolling element and the friction block in the direction perpendicular to the moving direction of the friction block, thereby effectively preventing the friction block from colliding with the caliper bracket and avoiding the problem of noise generated by the collision between the friction block and the caliper bracket when the vehicle is driving on a bumpy road surface.

[0017] In an alternative embodiment, lugs adapted to the receiving groove are formed at both ends of the friction block, and the embedding groove is provided on the lugs.

[0018] Advantageous effects: The friction block is cooperatively connected with the receiving groove of the caliper bracket through the lugs at both ends, and the receiving groove plays a certain limiting role, improving the mating reliability of the friction block.

[0019] In an alternative embodiment, the rolling element includes a ball, and the ball is rollably embedded in the groove structure.

[0020] Beneficial effects: The rolling elements are balls, and the groove structure guides and positions the balls, and thus can also position the friction block. It is not easy for components to have position offset and mutual impact, reducing noise and extending the service life at the same time.

[0021] In an alternative embodiment, an installation slot is provided on the caliper bracket, and the return spring assembly is clamped in the installation slot.

[0022] Beneficial effects: By providing the installation slot, it is convenient to fix and install the return spring assembly, improving the assembly reliability and installation convenience.

[0023] In an alternative embodiment, the return spring assembly includes:

[0024] A body;

[0025] A first claw formed at the upper edge of the body;

[0026] A second claw formed on the first side of the body;

[0027] A third claw formed on the second side of the body, the first side and the second side being oppositely arranged;

[0028] A spring arm formed at the bottom side of the body and adapted to abut against the friction block;

[0029] The first claw, the second claw and the third claw are engaged with the installation slot.

[0030] Beneficial effects: By providing the three claws, namely the first claw, the second claw and the third claw, multi-point engagement connection between the return spring assembly and the caliper bracket is realized. The installation reliability of the return spring assembly is high, and the situation that the return spring assembly fails due to insecure installation will not occur.

[0031] In an alternative embodiment, a support surface is formed at the bottom side of the body, and the spring arm is arranged on the support surface.

[0032] Beneficial effects: The provision of the support surface facilitates the tight fit between the return spring assembly and the friction block, improving the installation reliability.

[0033] In an alternative embodiment, the support surface is press-fitted with the friction block with interference elasticity, and the support surface is in clearance fit with the caliper bracket.

[0034] Beneficial effects: With such a fit between the support surface and the friction block and the caliper bracket, it is ensured that the rolling elements are reliably positioned in the groove structure and will not come out.

[0035] In a second aspect, the present utility model further provides a vehicle, comprising:

[0036] A brake disc;

[0037] The brake caliper according to any one of the above, and the brake caliper is intermittently braked and cooperated with the brake disc through the friction block.

[0038] Beneficial effects: Since the vehicle includes the brake caliper of the present utility model, therefore, rolling friction is achieved between the friction block and the caliper bracket through the rolling elements, and the rolling friction coefficient is much smaller than the sliding method adopted by the brake caliper assembly in the related art, thereby achieving the purpose of reducing drag; moreover, the rolling friction method will not affect the piston return amount and the required liquid volume of the caliper. Description of the Drawings

[0039] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the related art, the following will briefly introduce the drawings required to be used in the description of the specific embodiments or the related art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0040] Figure 1 It is an exploded structural view of the first brake caliper assembly in the related art;

[0041] Figure 2 It is an exploded structural view of the second brake caliper assembly in the related art;

[0042] Figure 3 It is a three-dimensional structural schematic diagram of a brake caliper according to an embodiment of the present utility model;

[0043] Figure 4 It is a structural schematic diagram of a brake caliper according to an embodiment of the present utility model;

[0044] Figure 5 For Figure 4 A partial enlarged structural schematic diagram of part A in, and the connection relationship between the friction block, the rolling element and the caliper bracket is shown in the figure;

[0045] Figure 6 It is a structural schematic diagram of a rebound assembly implemented by the present utility model;

[0046] Figure 7 It is a structural schematic diagram of a friction block implemented by the present utility model;

[0047] Figure 8 It is a schematic diagram of the assembly process of a rolling element and a friction block implemented by the present utility model;

[0048] Figure 9 Side view structural schematic diagram of a brake caliper according to an embodiment of the present utility model;

[0049] Figure 10 Exploded structural schematic diagram of a brake caliper according to an embodiment of the present utility model;

[0050] Figure 11 Partial sectional view structural schematic diagram of a brake caliper according to an embodiment of the present utility model.

[0051] Explanation of reference numerals:

[0052] 1. Caliper body;

[0053] 2. Caliper bracket; 21. Limit guide groove; 22. Installation card slot;

[0054] 3. Friction block; 31. Steel back; 32. Embedded groove;

[0055] 4. Rebound assembly; 41. First claw; 42. Second claw; 43. Third claw; 44. Spring arm; 45. Support surface;

[0056] 5. Rolling body;

[0057] 6. Brake disc. Detailed implementation manners

[0058] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0059] In the description of the present utility model, it should be noted that unless otherwise specified, the meaning of ″a plurality of″ is two or more; the orientation or positional relationships indicated by the terms ″upper″, ″lower″, ″left″, ″right″, ″inner″, ″outer″, ″front end″, ″rear end″, ″head″, ″tail″, etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model. In addition, the terms ″first″, ″second″, ″third″, etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0060] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0061] The following combines Figures 1 to 11 to describe the embodiments of the present utility model.

[0062] According to an embodiment of the present utility model, on the one hand, a brake caliper is provided, including:

[0063] A caliper body 1;

[0064] A friction block 3, which is in transmission connection with the caliper body 1 and can move towards the brake disc 6 under the drive of the caliper body 1 to achieve braking;

[0065] A caliper bracket 2, on which a receiving groove for the movement of the friction block 3 is provided;

[0066] A return spring assembly 4, which is arranged on the caliper bracket 2 and is adapted to provide a return spring force away from the brake disc 6 to the friction block 3;

[0067] A rolling element 5, and a groove structure for the rolling of the rolling element 5 is provided on the mating surface between the friction block 3 and the caliper bracket 2.

[0068] Since the brake caliper is provided with the rolling element 5, when the friction block 3 is subjected to the driving force of the caliper body 1 or the return spring force of the return spring assembly 4, the rolling element 5 rolls in the groove structure to drive the friction block 3 to move. During the process, rolling friction is achieved between the friction block 3 and the caliper bracket 2 through the rolling element 5. The rolling friction coefficient is much smaller than the sliding friction coefficient, thereby achieving the purpose of reducing drag or even approaching zero drag, improving the braking efficiency, and also reducing the energy consumption; moreover, it will not affect the piston return amount and the required liquid amount of the caliper.

[0069] In some embodiments, the groove structure is formed on the bottom side of the friction block 3 and / or the bottom side of the receiving groove.

[0070] Compared with the way of arranging on other mating surfaces, when the groove structure is formed on the bottom side of the friction block 3 and / or the bottom side of the receiving groove, the rolling element 5 is not easily disengaged from the groove structure, and the mating reliability between the rolling element 5 and the friction block 3 and / or the caliper bracket 2 can be improved.

[0071] When the groove structure is formed on the bottom side of the friction block 3 and the bottom side of the receiving groove, compared with the way of only arranging it on one of them, the movement of the friction block 3 is more stable.

[0072] In some embodiments, an embedding groove 32 is formed on the bottom side of the friction block 3, and a limiting guide groove 21 extending along the moving direction of the friction block 3 is formed on the bottom side of the receiving groove. The embedding groove 32 and the limiting guide groove 21 constitute a groove structure.

[0073] By forming the embedding groove 32 on the friction block 3 of the moving part and arranging the limiting guide groove 21 on the fixed part, the caliper bracket 2, the movement of the friction block 3 is more stable, and it is also convenient to control the movement path of the friction block 3. Moreover, the limiting guide groove 21 restricts the movement of the rolling body 5 and the friction block 3 in the direction perpendicular to the moving direction of the friction block 3, thereby effectively preventing the friction block 3 from hitting the caliper bracket 2 and avoiding the problem of noise generated by the collision between the friction block 3 and the caliper bracket 2 when the vehicle is driving on a bumpy road surface.

[0074] It should be noted that, as Figure 3 and Figure 10 shown, the length of the limiting guide groove 21 is designed to match the initial position of the friction block 3. Therefore, no matter how large the return force of the return spring assembly 4 is, the friction block 3 will stop when it runs to the end of the guide groove, realizing the limitation of the movement direction (the first direction) of the friction block 3, which not only ensures the reduction of drag but also avoids the problem of increased required liquid volume caused by excessive return.

[0075] In some embodiments, ear portions adapted to the receiving groove are formed at both ends of the friction block 3, and the embedding groove 32 is formed in the ear portions.

[0076] The friction block 3 is cooperatively connected with the receiving groove of the caliper bracket 2 through the ear portions at both ends, and the receiving groove plays a certain limiting role, improving the cooperation reliability of the friction block 3.

[0077] In some embodiments, the rolling body 5 includes a ball, and the ball is rollably embedded in the groove structure.

[0078] The rolling body 5 adopts a ball, and the groove structure plays a role in guiding and limiting the ball, and thus can also play a role in limiting the friction block 3. It is not easy for the components to generate position offset and mutual impact, reducing noise and prolonging the service life at the same time.

[0079] Specifically, the rolling body 5 can adopt steel balls, and the material of the balls can also adopt other materials that meet the requirements of both stiffness and strength.

[0080] In some embodiments, an installation slot 22 is provided on the caliper bracket 2, and the return spring assembly 4 is clamped in the installation slot 22.

[0081] The provision of the installation slot 22 facilitates the fixing and installation of the return spring assembly 4, improving the assembly reliability and installation convenience.

[0082] In some embodiments, as Figure 6 shown, the return spring assembly 4 includes:

[0083] Body;

[0084] The first clamping jaw 41 is formed at the upper edge of the body;

[0085] The second clamping jaw 42 is formed on the first side of the body;

[0086] The third clamping jaw 43 is formed on the second side of the body, and the first side and the second side are oppositely arranged;

[0087] The spring arm 44 is formed at the bottom side of the body and is adapted to abut against the friction block 3;

[0088] The first clamping jaw 41, the second clamping jaw 42 and the third clamping jaw 43 are snap - connected to the installation slot 22.

[0089] By providing the three clamping jaws, namely the first clamping jaw 41, the second clamping jaw 42 and the third clamping jaw 43, the multi - point snap - connection between the return spring assembly 4 and the caliper bracket 2 is realized. The installation reliability of the return spring assembly 4 is high, and the situation that the return spring assembly 4 fails due to insecure installation will not occur.

[0090] In some embodiments, a support surface 45 is formed at the bottom side of the body, and the spring arm 44 is arranged on the support surface 45.

[0091] The provision of the support surface 45 facilitates the close fit between the return spring assembly 4 and the friction block 3 and improves the installation reliability.

[0092] In some embodiments, the support surface 45 is press - fitted with the friction block 3 with interference elasticity, and the support surface 45 is in clearance fit with the caliper bracket 2.

[0093] With such a fit between the support surface 45, the friction block 3 and the caliper bracket 2, it is ensured that the rolling element 5 is reliably limited in the groove structure and will not come out.

[0094] According to an embodiment of the present invention, on the other hand, a vehicle is further provided, including:

[0095] A brake disc 6;

[0096] A brake caliper, and the brake caliper is intermittently braked with the brake disc 6 through the friction block 3.

[0097] Since the vehicle includes the brake caliper of the present invention, therefore, rolling friction is realized between the friction block 3 and the caliper bracket 2 through the rolling element 5. The rolling friction coefficient is much smaller than the sliding mode adopted by the brake caliper assembly in the related art, and thus the purpose of reducing drag is achieved; moreover, the rolling friction method will not affect the piston return amount and the required liquid volume of the caliper.

[0098] In one embodiment, the brake caliper includes a main caliper body 1, a caliper bracket 2, a return spring, and steel balls. A limiting guide groove 21 is provided on the caliper bracket 2. The main return spring is clamped and limited by three claws with the installation slot 22 of the caliper bracket 2, and the spring arm 44 of the main return spring abuts against the steel back 31 of the friction block 3. See Figure 3 .

[0099] The steel balls are clamped and limited between the embedded groove 32 of the friction block 3 and the limiting guide groove 21 of the caliper bracket 2. The friction block 3 and the steel balls can move (in the first direction) in a rolling friction manner along the limiting guide groove 21 on the caliper bracket 2, and the limiting guide groove 21 of the caliper bracket 2 limits the friction block 3 and the steel balls in the second direction perpendicular to the first direction, preventing the lug of the friction block 3 from hitting the caliper bracket 2.

[0100] The support surface 45 of the main return spring is elastically press-fitted with interference on the lug of the friction block 3 and has a clearance fit with the caliper bracket 2 to ensure that the steel balls do not come out of the embedded groove 32 of the friction block 3 and the limiting guide groove 21 of the caliper bracket 2. See Figure 3 .

[0101] The steel balls are fitted into the embedded groove 32 of the friction block 3. See Figure 8 .

[0102] When the brake caliper is pressurized, it pushes the friction block 3 to clamp the brake disc 6 to achieve vehicle braking. During this process, the spring arm 44 of the main return spring undergoes elastic deformation. After the brake caliper releases the pressure, the friction block 3 and the brake disc 6 are separated by the return elastic force of the main return spring, eliminating the friction force between the friction block 3 and the brake disc 6 and reducing the caliper drag force. See Figure 11 .

[0103] In the related art, a figure-eight spring or a main return spring is used in cooperation with the friction block 3, and the friction block 3 and the brake disc 6 are separated by the elastic potential energy accumulated during the compression process. The sliding friction force that the figure-eight spring and the main return spring need to overcome is relatively large, generally 30 N (the sliding friction coefficient is relatively large, 0.5 μ). Therefore, the rebound efficiency is poor, and the caliper drag force is relatively large (≥1.5 N·m). The structure of the main return spring, steel balls, friction block 3, and caliper bracket 2 of the present utility model changes the sliding friction to rolling friction (the rolling friction coefficient is 0.0018 - 0.0025 μ), and the rolling friction force is only 0.15 N. The estimated caliper drag is close to 0 N·m, achieving the zero-drag target and not affecting the piston return amount and the required liquid volume of the caliper. At the same time, a limiting structure for the friction block 3 in the second direction is added to prevent the lug of the friction block 3 from hitting the caliper bracket 2 to generate Clonk noise on high-frequency and low-amplitude bumpy roads.

[0104] The rolling elements 5 (steel balls) of the present utility model are in direct contact with the caliper bracket 2. The steel balls are embedded in the lugs of the friction block 3 and drive the friction block 3 to move in the limiting guide groove 21 on the caliper bracket 2. The limiting guide groove 21 limits the steel balls and the friction block 3 in the first direction and the second direction. The limit in the first direction avoids the increase in the piston return amount and the required liquid volume of the caliper caused by excessive return, and circumvents the problems of increased braking dead travel and delayed braking response. The limit in the second direction restricts the movement of the friction block 3 in the second direction and avoids the contact and collision between the lugs of the friction block 3 and the caliper bracket 2 when the lugs return, thus generating impact noise.

[0105] Although the embodiments of the present utility model have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present utility model, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A brake caliper, characterized in that, Comprising: A caliper body (1); A friction block (3), which is in transmission connection with the caliper body (1) and can move towards the brake disc (6) under the drive of the caliper body (1) to achieve braking; A caliper bracket (2) provided with a receiving groove for the movement of the friction block (3); A return spring assembly (4) arranged on the caliper bracket (2) and adapted to provide a return spring force away from the brake disc (6) to the friction block (3); A rolling element (5), and a groove structure for the rolling of the rolling element (5) is provided on the mating surface of the friction block (3) and the caliper bracket (2).

2. The brake caliper according to claim 1, wherein, The groove structure is formed on the bottom side of the friction block (3) and / or the bottom side of the receiving groove.

3. The brake caliper according to claim 2, wherein An embedding groove (32) is formed on the bottom side of the friction block (3), and a limiting guide groove (21) extending along the moving direction of the friction block (3) is formed on the bottom side of the receiving groove. The embedding groove (32) and the limiting guide groove (21) constitute the groove structure.

4. The brake caliper according to claim 3, characterized in that, Both ends of the friction block (3) are formed with lugs adapted to the receiving groove, and the embedding groove (32) is formed on the lugs.

5. The brake caliper according to claim 1, characterized in that, The rolling element (5) includes a ball, and the ball is rollably embedded in the groove structure.

6. The brake caliper according to claim 1, characterized in that An installation card slot (22) is provided on the caliper bracket (2), and the return spring assembly (4) is clamped in the installation card slot (22).

7. The brake caliper according to claim 6, characterized in that, The return spring assembly (4) includes: A body; A first claw (41) formed at the upper edge of the body; A second claw (42) formed at the first side of the body; A third claw (43) formed at the second side of the body, and the first side and the second side are oppositely arranged; A spring arm (44) formed at the bottom side of the body and adapted to abut against the friction block (3); The first claw (41), the second claw (42) and the third claw (43) are in snap connection with the installation card slot (22).

8. The brake caliper according to claim 7, wherein, A support surface (45) is formed at the bottom side of the body, and the spring arm (44) is arranged on the support surface (45).

9. The brake caliper according to claim 8, wherein, The support surface (45) is in interference elastic press connection with the friction block (3), and the support surface (45) is in clearance fit with the caliper bracket (2).

10. A vehicle, characterized in that, Comprising: A brake disc (6); The brake caliper according to any one of claims 1-9, and the brake caliper is in intermittent braking cooperation with the brake disc (6) through the friction block (3).

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