Adaptive Return Mechanism for Disc Brakes and Fixed Caliper Brakes

Abstract

The present invention relates to the field of fixed brakes, and discloses an adaptive return mechanism for a disc brake and a fixed brake caliper, which includes a spring element and a brake pad connected to the spring element. The spring element at least has a connecting hook one and a connecting hook two. A connecting cavity one connected to the connecting hook one and a connecting cavity two connected to the connecting hook two are provided on the brake pad. The spring element is connected to the connecting cavity one through the connecting hook one, and the connecting hook two and the connecting cavity two form an initial stretching angle. The initial stretching angle determines the initial distance between the brake pad and the brake disc. During the braking process, the brake pad acts on the spring element, the stretching angle becomes larger, and the distance between the brake pad and the brake disc shrinks. This return mechanism can not only achieve return, but also can adaptively compensate and adjust the clearance.

Description

Technical Field

[0001] The present invention relates to the field of brakes, and particularly to an adaptive return mechanism for a disc brake and a fixed brake caliper. Background Art

[0002] The friction pads of existing fixed caliper disc brakes do not have an active return function. During each braking, the friction pads are clamped against the brake disc under the action of the piston to generate braking force, causing the vehicle to decelerate or stop. When braking ends, the piston returns first, and then the friction pads are thrown away from the brake disc by the rotation of the brake disc to achieve the return of the friction pads. Chinese Patent CN201911396613.0 discloses an active return mechanism for friction pads, which uses a tower spring structure to provide assistance for the return of the brake pads. However, this structure has the following disadvantages: since the tower spring is in direct contact with the brake pads, it is prone to uneven force, and the brake pads are prone to instability during the return process. At the same time, the spring is prone to friction with the guide pin, resulting in a large noise.

[0003] Moreover, the gap of the friction pads of the traditional return mechanism becomes larger after wear, resulting in an extended braking time, affecting the braking performance, and requiring manual adjustment. Summary of the Invention

[0004] The present invention aims at the disadvantages of the prior art and provides an adaptive return mechanism for a disc brake and a fixed brake caliper.

[0005] To solve the above technical problems, the present invention is solved by the following technical solutions:

[0006] An adaptive return mechanism for a disc brake includes a spring element and a brake pad connected to the spring element. The spring element has at least a connecting hook one and a connecting hook two. A connecting cavity one connected to the connecting hook one and a connecting cavity two connected to the connecting hook two are provided on the brake pad. The spring element is connected to the connecting cavity one through the connecting hook one and the connecting hook two is connected to the connecting cavity two to form an initial stretching angle, and the initial stretching angle determines the initial distance between the brake pad and the brake disc.

[0007] Preferably, the number of the connecting cavity one and the connecting cavity two is multiple, and the initial stretching angle is adjusted by the connecting hook one connecting to the connecting cavity one at different positions or / and the connecting hook two connecting to the connecting cavity two at different positions.

[0008] Preferably, the spring element is located on the braking side of the brake pad. The brake pad includes a back plate and a friction block. The connecting cavity one and the connecting cavity two are opened on the back plate. The angle between the axis of the connecting cavity one and the end face of the back plate is an acute angle, and the angle between the axis of the connecting cavity one and the spring element is an acute angle.

[0009] Preferably, the opening at the side of the connecting cavity one in contact with the connecting hook one is in an arc structure.

[0010] Preferably, the connection cavities I are arranged parallel to each other, and the connection cavities II are arranged parallel to each other.

[0011] Preferably, the spring element includes a plate-shaped spring plate I and spring plate II with resilience ability. The connection hook I is located at the end of the spring plate I, the connection hook II is located at the end of the spring plate II, and the included angle between the spring plate I and the spring plate II is the initial stretching angle.

[0012] Preferably, when the brake pad wears beyond a certain range, during braking, the brake pad acts on the spring element, and the stretching angle gradually increases. The connection hook I and the connection hook II slide relatively towards the inlet ends of the connection cavity I and the connection cavity II respectively. When the braking stroke becomes larger due to excessive wear of the brake pad, the connection hook I and the connection hook II slide out of the connection cavity I and the connection cavity II and slide into the adjacent outer connection cavity I and connection cavity II under the action of the thrust of the brake pad. The initial stretching angle becomes larger, and the gap between the brake pad and the brake disc becomes smaller.

[0013] Preferably, the brake pad includes an inner brake pad and an outer brake pad. Spring elements are arranged on both the inner brake pad and the outer brake pad, and a support frame is further included. The spring elements are fixedly installed on the support frame.

[0014] A fixed brake caliper is equipped with the above-mentioned adaptive return mechanism for a disc brake.

[0015] Through the above technical solutions, the present invention has the following technical effects:

[0016] The present invention designs an adaptive return mechanism for a disc brake, and creatively designs a return mechanism. This return mechanism can simultaneously have the advantages of limiting position, returning to position, and adaptively adjusting the gap, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the return mechanism.

[0018] Figure 2 It is a schematic diagram of the structure of the return mechanism.

[0019] Figure 3 It is a schematic diagram of the cooperation between the connection hook and the connection cavity in the initial state.

[0020] Figure 4 It is a schematic diagram of the cooperation between the connection hook and the connection cavity during braking.

[0021] The names of the parts referred to by each numerical label in the attached drawings are as follows: 500 - spring element, 501 - brake pad, 502 - connecting hook one, 503 - connecting hook two, 504 - initial stretching angle, 505 - connecting cavity one, 506 - connecting cavity two, 507 - back plate, 508 - friction block, 509 - ratchet rack, 510 - spring plate one, 511 - spring plate two, 512 - support frame, 513 - arc structure. Specific Embodiment

[0022] The present invention will be further described in detail below in conjunction with the attached drawings and embodiments.

[0023] Embodiment 1

[0024] An adaptive return mechanism for a disc brake includes a spring element 501 and a brake pad 501 connected to the spring element 501. The spring element 501 has at least a connecting hook one 502 and a connecting hook two 503. A connecting cavity one 505 connected to the connecting hook one 502 and a connecting cavity two 506 connected to the connecting hook two 503 are provided on the brake pad 501. The spring element 501 is connected to the connecting cavity one 505 through the connecting hook one 502, and the connecting hook two 503 and the connecting cavity two 506 form an initial stretching angle 504, and the initial stretching angle 504 determines the initial distance between the brake pad 501 and the brake disc. The connecting hook and the connecting cavity are detachably connected, and the connecting hook is hooked at the entrance of the connecting cavity to achieve the connection. Among them, different stretching angles correspond to a unique distance between the brake pads 501, more precisely, the distance between the connecting cavity and the brake disc.

[0025] Since it is necessary to consider the clearance adjustment in the later stage, the number of the connecting cavity one 505 and the connecting cavity two 506 is multiple, and the initial stretching angle 504 is adjusted by connecting the connecting hook one 502 to the connecting cavity one 505 at different positions or / and connecting the connecting hook two 503 to the connecting cavity two 506 at different positions. Connecting the connecting hook one 502 and the connecting hook two 503 in different connecting cavity one 505 and connecting cavity two 506 can adjust the size of the initial stretching angle 504, thereby adjusting the clearance between the brake pad 501 and the brake disc.

[0026] In this embodiment, the spring element 501 is located on the braking side of the brake pad 501. The brake pad 501 includes a back plate 507 and a friction block 508. The connecting cavity one 505 and the connecting cavity two 506 are opened on the back plate 507. The angle between the axis of the connecting cavity one 505 and the end face of the back plate 507 is an acute angle, and the angle between the axis of the connecting cavity one 505 and the spring element is an acute angle. That is, the connecting hook and the connecting cavity form a ratchet tooth fit, and the connecting hook one 502 and the connecting hook two 503 can only move towards each other and cannot move relative to each other under the thrust of the brake pad 501.

[0027] In order to facilitate automatic tooth jumping, the opening of the side surface of the connecting cavity 1 505 and the side surface of the connecting hook 1 502 facing the buckle is an arc structure 513.

[0028] In this embodiment, the first connecting cavities 505 are arranged parallel to each other, and the second connecting cavities 506 are arranged parallel to each other. A "ratchet bar 509" is formed between adjacent first connecting cavities 505.

[0029] In this embodiment, the spring element 501 includes a plate-shaped spring plate 1 510 and a spring plate 2 511 with rebound ability, a connecting hook 1 502 is located at the end of the spring plate 1 510, a connecting hook 2 503 is located at the end of the spring plate 2 511, and the angle between the spring plate 1 510 and the spring plate 2 511 is an initial stretching angle 504. The connecting hook 1 502 and the connecting hook 2 503 are formed by bending the ends of the spring plate 1 510 and the spring plate 2 511, and the connecting cavity 1 505 and the connecting cavity 2 506 have a certain width, so the contact area between the connecting hook and the connecting cavity is large and the connection is reliable, which can provide reliable return force and support force, and avoid the phenomenon of vibration caused by insufficient support force.

[0030] In this embodiment, when the brake pad 501 is worn beyond a certain range, the brake pad 501 acts on the spring element 501 during braking, and the stretching angle gradually increases. The connecting hook 1 502 and the connecting hook 2 503 slide relative to the entrance ends of the connecting cavity 1 505 and the connecting cavity 2 506 respectively. When the brake pad 501 has a larger braking stroke due to excessive wear, the connecting hook 1 502 and the connecting hook 2 503 slide out of the connecting cavity 1 505 and the connecting cavity 2 506 and slide into the adjacent outer connecting cavity 1 505 and the connecting cavity 2 506 under the action of the thrust of the brake pad 501. The initial stretching angle 504 increases, and the gap between the brake pad 501 and the brake disc decreases.

[0031] In this embodiment, the brake pad 501 includes an inner brake pad 501 and an outer brake pad 501, both of which are provided with spring elements 501, and also includes a support frame 512, and the spring element 501 is fixedly mounted on the support frame 512. The fixed brake caliper is equipped with the above-mentioned adaptive return mechanism for the disc brake.

[0032] The scheme works as follows:

[0033] The support frame 512 is fixedly arranged on the back side of the pliers body. The brake pad 501 includes a back plate 507 and a friction pad. The number of spring elements 501 is two, which are respectively arranged at both ends of the support frame 512. The inner side of the spring element 501 forms a certain acute angle with the back plate 507 as a whole. Since both ends of the spring element 501 are connected to the back plate 507 through the connecting hook one 502 and the connecting hook two 503, the spring element 501 and the back plate 507 enclose a triangular structure, and the obtuse angle formed by the spring plate one 510 and the spring plate two 511 of the spring element 501 is the stretching angle.

[0034] In the initial state, the hook one and the hook two abut against the inner side of the connecting cavity one 505 and the connecting cavity two 506, which is close to the middle part of the brake pad 501. During braking, the brake piston pushes the brake pad 501 towards the brake disc. The back plate 507 of the brake pad 501 acts on the spring element 501, and the stretching angle of the spring element 501 becomes larger. The connecting hook one 502 and the connecting hook two 503 move towards both sides and abut against the sides of the connecting cavity one 505 and the connecting cavity two 506 that are far away from the middle part of the back plate 507. When the friction part of the brake pad 501 wears to a certain extent, the stroke of the brake pad 501 becomes longer during braking, and the connecting hook one 502 and the connecting hook two 503 will slip out of the entrance of the connecting cavity and slide into the adjacent outer connecting cavity one 505 and the connecting cavity two 506. When returning to the original position, due to the ratchet structure, the connecting hook one 502 and the connecting hook two 503 will not slip out of the current connecting cavity one 505. The connecting cavity two 506. The initial stretching angle becomes larger, and the gap between the back plate 507 and the brake disc becomes smaller, thus solving the problem that the gap becomes larger after the friction block 508 is worn.

[0035] The present invention designs an adaptive return mechanism for a disc brake, and creatively designs a return mechanism, which can simultaneously have the advantages of limiting position, returning to the original position, and adaptively adjusting the gap.

[0036] Embodiment 2

[0037] This embodiment discloses an adaptive return mechanism for a disc brake, and the support frame 512 and the spring element 501 are fixed by welding.

[0038] Embodiment 3

[0039] The difference between this embodiment and Embodiment 2 is that: the number of the connecting cavity one 505 and the connecting cavity two 506 is three.

Claims

1. Adaptive return mechanism for disc brakes, Features: The invention comprises a spring element and a brake pad connected to the spring element, wherein the spring element has at least a first connecting hook and a second connecting hook, and the brake pad is provided with a first connecting cavity connected to the first connecting hook and a second connecting cavity connected to the second connecting hook, and the spring element is connected to the first connecting cavity and the second connecting cavity through the first connecting hook and the second connecting hook; the invention also comprises a support frame, which is fixedly arranged on the back side of the caliper body, and the brake pad comprises an inner brake pad and an outer brake pad; The inner brake pad and the outer brake pad are both provided with spring elements, which are fixedly mounted on the support frame, and the two ends of the spring elements are connected to the back plate by providing a connecting hook 1 and a connecting hook 2, and the spring elements and the back plate form a triangular structure; The spring element includes a plate-shaped spring plate 1 and a spring plate 2 with rebound ability. The connecting hook 1 is located at the end of the spring plate 1, and the connecting hook 2 is located at the end of the spring plate 2. The angle between the spring plate 1 and the spring plate 2 is the initial stretching angle; the initial stretching angle determines the initial distance between the brake pad and the brake disc. During the braking process, the brake pad acts on the spring element, the stretching angle increases, and the distance between the brake pad and the brake disc decreases; there are multiple connecting cavities 1 and 2, and the initial stretching angle is adjusted by connecting the connecting hook 1 to the connecting cavity 1 at a different position or / and connecting the connecting hook 2 to the connecting cavity 2 at a different position.

2. The adaptive return mechanism for a disc brake according to claim 1, Features: The spring element is located on the braking side of the brake pad, the brake pad includes a back plate and a friction block, connecting cavity one and connecting cavity two are opened on the back plate, the axis of connecting cavity one forms an acute angle with the end face of the back plate, and the axis of connecting cavity one forms an acute angle with the spring element.

3. The adaptive return mechanism for a disc brake according to claim 1 or 2, Features: When the friction part of the brake pad is worn beyond the preset value, the initial gap becomes larger than the preset value. During braking, the connecting hook 1 and the connecting hook 2 can be pushed into the adjacent connecting cavity 1 and the connecting cavity 2 under the action of the thrust of the brake pad. The initial stretching angle becomes larger, and the distance between the friction end face of the brake pad and the brake disc is reduced to meet the preset gap size.

4. The adaptive return mechanism for a disc brake according to claim 1, Features: In the initial state, the side openings opposite to the sides where the connecting cavity 1 is hooked with the connecting hook 1 are arc transitions, and "ratchet bars" are formed between adjacent connecting cavities 1. The structure of the connecting cavity 1 is the same as that of the connecting cavity 2, and the structure of the connecting hook 1 is the same as that of the connecting hook 2.

5. The adaptive return mechanism for a disc brake according to claim 1, Features: The first connecting cavities are arranged parallel to each other, and the second connecting cavities are arranged parallel to each other.

6. The adaptive return mechanism for a disc brake according to claim 3, Features: When the brake pads wear beyond a certain range, during braking, the brake pads act on the spring elements, and the stretching angle gradually increases. The connecting hook one and the connecting hook two slide relatively towards the inlet ends of the connecting cavity one and the connecting cavity two respectively. After the braking stroke becomes larger due to excessive wear of the brake pads, the connecting hook one and the connecting hook two slide out of the connecting cavity one and the connecting cavity two and slide into the adjacent outer connecting cavity one and the connecting cavity two under the action of the thrust of the brake pads. The initial stretching angle becomes larger, and the gap between the brake pads and the brake disc becomes smaller.

7. Fixed caliper brake, Characterized in that: It is equipped with the adaptive return mechanism for disc brakes according to any one of claims 1 to 6.

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