Spring structure and caliper for disc brake friction plate return

Abstract

This invention relates to the field of brake calipers and discloses a spring structure for the return of friction pads in disc brakes. The structure includes a support spring plate arranged laterally between an inner and outer friction pad. Both ends of the support spring plate are fixedly connected to support wings with elastic recovery capability. The support wings are axially oriented and include a central fixing portion and support ears formed on both sides of the fixing portion. The fixing portion and the support spring plate are fixedly connected. The support ears support the inner and outer friction pads respectively. Each support ear includes a first support opening at its end for supporting a back plate on which the friction pads are mounted. The first support opening is formed by a first limiting piece and a second limiting piece, which together form an "L" shape. The first limiting piece is used to fit against the inner surface of the back plate, and the second limiting piece is used to fit against the back side of the caliper. This return structure has advantages such as stable and reliable return, no vibration, and long service life.

Description

Technical Field

[0001] This invention relates to the field of disc brakes, and more particularly to a spring structure for the return of friction pads in disc brakes. Background Technology

[0002] In a disc brake, the caliper achieves braking by bringing the brake pads, which are located inside the friction pads, close to the brake disc and rub against it. After braking is completed, the brake pads are moved away from the brake disc by a spring.

[0003] Chinese Patent No. CN112585372A discloses a spring for a friction pad associated with a caliper of a disc brake, for elastically biasing the friction pad away from the brake disc. The spring includes a central extension and two opposite lateral extensions extending from the central extension in two opposite lateral directions, each forming a support extension, a resting extension, and a wing-shaped extension extending between the support extension and the resting extension. The support extensions are located on the same support plane, and the wing-shaped extensions include a descending wing-shaped extension extending from the upper tip point further away from the longitudinal mid-plane and toward the lower side of the spring to a fold line connecting the wing-shaped extension and the resting extension. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution.

[0005] A spring structure for the return of friction pads in a disc brake includes a support spring, which is laterally arranged between an inner friction pad and an outer friction pad. Both ends of the support spring are fixedly connected to support wings with elastic recovery capability. The support wings are axially arranged and include a fixing part in the middle and support ears formed on both sides of the fixing part. The fixing part and the support spring are fixedly connected. The support ears are used to support the inner friction pad and the outer friction pad respectively. The support ears include a first support opening at the end for supporting a back plate on which the friction pad is installed. The first support opening is formed by a first limiting piece and a second limiting piece. The first limiting piece and the second limiting piece form an "L" shape with each other. The first limiting piece is used to fit against the inner side of the back plate, and the second limiting piece is used to fit against the back side of the back plate.

[0006] Preferably, the support ear also includes an anti-fatigue part for connecting with the connecting part and a connecting part for connecting the anti-fatigue part and the first support port, wherein the bend at the connection between the connecting part and the first support port faces inward and the bend at the connection between the connecting part and the anti-fatigue part faces outward.

[0007] As a preferred option, the fatigue-resistant part has a "C"-shaped structure, and the "C"-shaped structure forms a deformation opening.

[0008] Preferably, the distance between the two ends of the fatigue-resistant part is less than the maximum radial dimension of the fatigue-resistant part.

[0009] As a preferred option, the support wing is an integrally molded elastic spring structure.

[0010] Preferably, the fixing part and the supporting spring are fixed by riveting.

[0011] Preferably, the end of the first limiting piece is bent to form a hook, which is used to cooperate with the positioning groove on the brake block and the back plate to reduce the swing between the spring structure and the back plate.

[0012] Preferably, the height of the small hook is between 2mm and 4mm.

[0013] Preferably, a clearance notch is formed at the connection between the connecting part and the second limiting piece.

[0014] This solution also discloses a caliper equipped with the aforementioned spring structure for the return of friction pads in a disc brake.

[0015] This technical solution has the following technical effects:

[0016] This design provides stable support for the friction pads, ensuring they remain firmly in contact with the return spring structure throughout their movement, preventing excessive swaying and resulting in smoother, quieter caliper braking. Simultaneously, the R-shaped bend allows for a larger deformation range, accommodating the increased deformation even after significant brake pad wear. This ensures the spring maintains a better yield stress limit, guaranteeing that even after significant wear and prolonged exposure to large caliper strokes and heavy loads, the contact between the spring and brake pads will not cause permanent deformation, minimizing spring force loss. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the device.

[0018] Figure 2 This is a schematic diagram of the brake disc and spring.

[0019] Figure 3 This is a schematic diagram of a spring.

[0020] The reference numerals in the figure are labeled with the following technical names:

[0021] 1—Support spring, 2—Support wing, 3—Support ear, 4—Fixing part, 5—First support opening, 6—First limiting piece, 7—Second limiting piece, 8—Fatigue-resistant part, 10—Connecting part, 11—Deformation opening, 12—Hook, 13—Relief notch, 14—Shaft hole. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0023] Example 1

[0024] A spring structure for the return of friction pads in a disc brake includes a support spring 1, which is laterally positioned between an inner friction pad and an outer friction pad. Both ends of the support spring 1 are fixedly connected to support wings 2 with elastic recovery capability. The support wings 2 are axially arranged and include a central fixing portion 4 and support ears 3 formed on both sides of the fixing portion 4. The fixing portion 4 and the support spring 1 are fixedly connected. The support ears 3 support the inner and outer friction pads respectively. Each support ear 3 includes a first support opening 5 at its end for supporting a back plate on which the friction pads are mounted. The first support opening 5 is formed by a first limiting piece 6 and a second limiting piece 7, which form an "L" shape with each other. The first limiting piece 6 is used to fit against the inner side of the back plate, and the second limiting piece 7 is used to fit against the back side of the back plate. In this embodiment, the support spring 1 acts as a skeleton, and both the radially supporting support assembly and the axially supporting support wings 2 are fixedly mounted on the support spring 1. There are four supporting ears 3, which are respectively supported at both ends of the inner friction plate and both ends of the outer friction plate. In this embodiment, the spring structure is supported on the back plate on which the friction plates are mounted.

[0025] In this embodiment, the support ear 3 further includes an anti-fatigue part 8 for connecting with the connecting part 10, and a connecting part 10 connecting the anti-fatigue part 8 and the first support opening 5. The connecting part 10 is an inclined elastic spring, and in this embodiment, the thickness of the connecting part 10 is 0.5~1.0mm. In this embodiment, the bend at the connection between the connecting part 10 and the first support opening 5 faces inward, and the bend at the connection between the connecting part 10 and the anti-fatigue part 8 faces outward. This structural design facilitates the storage of force by the support wing 2 and increases its return capability.

[0026] In this embodiment, the fatigue-resistant part 8 has a "C"-shaped structure, forming a deformation opening 11. The distance between the two ends of the fatigue-resistant part 8 is less than the maximum radial dimension of the fatigue-resistant part 8. This structure not only serves the purpose of fatigue resistance but also reduces the radial dimension of the support wing 2.

[0027] In this embodiment, the support wing 2 is an integrally formed elastic spring structure. The fixing part 4 is riveted to the support spring 1. The support spring 1 is provided with a notch for matching the fixing part 4, and the fixing part 4 is limited within the notch.

[0028] In this embodiment, the end of the first limiting piece 6 is bent to form a hook 12. The hook 12 is used to cooperate with the positioning groove on the brake block and the back plate to reduce the swing between the spring structure and the back plate. In this embodiment, the brake block or the back plate is provided with a chamfer, which plays a guiding role in the assembly process of the spring. It can also serve as a mechanical alarm when the brake block is worn to the limit. As the contact part wears with the friction block, the gap between the spring and the pad will decrease as the spring swings around the small hook 12 as a fulcrum, making the spring and the pad fit more tightly. Specifically, in this embodiment, the height of the small hook 12 is between 2mm and 4mm, preferably 2.5mm.

[0029] In this embodiment, a clearance notch 13 is formed at the connection between the connecting part 10 and the second limiting piece 7.

[0030] This technical solution has the following technical effects:

[0031] This design provides stable support for the friction pads, ensuring they remain firmly in contact with the return spring structure throughout their movement, preventing excessive swaying and resulting in smoother, quieter caliper braking. Simultaneously, the R-shaped bend allows for a larger deformation range, accommodating the increased deformation even after significant brake pad wear. This ensures the spring maintains a better yield stress limit, guaranteeing that even after significant wear and prolonged heavy braking under heavy loads, the contact between the spring and brake pads will not cause permanent deformation, minimizing spring force loss.

[0032] Example 2

[0033] The difference between this embodiment and embodiment 1 is that the support wing 2 and the support spring 1 are fixed by welding.

[0034] Example 3

[0035] The difference between this embodiment and embodiment 1 is that the support wing 2 and the support spring 1 are fixed with screws.

[0036] Example 4

[0037] The difference between this embodiment and Embodiment 1 is that this solution also discloses a caliper equipped with the above-mentioned spring structure for the return of the friction pads of a disc brake.

[0038] Example 5

[0039] This embodiment provides a caliper. One end of the support spring 1 is provided with a support wing 2, and the other end of the support spring 1 is fixedly connected to the caliper body or limited and supported on the caliper body. In this embodiment, the end of the support spring 1 is supported on the caliper body reinforcing arm 16. The back plate connecting the friction plate is provided with shaft holes 14 for installing guide rods and counterweight holes 15 for installing counterweights; each back plate has one shaft hole 14 and one counterweight hole 15 at both ends. Guide rods 17 corresponding to the shaft holes 14 are installed on the caliper body, and the shaft holes 14 are attached to the guide rods 17. Therefore, the number of guide rods in this embodiment is 4. Compared with the traditional dual-axis guide, this solution adopts a four-axis guide, which can resist the thrust generated by vibration acceleration to prevent slippage, and at the same time enhance the ability of the brake block to reset.

[0040] Example 6

[0041] The difference between this embodiment and embodiment 5 is that the clamp body is a one-piece molded structure.

Claims

1. A spring structure for the return of friction pads in a disc brake, characterized in that: Includes a support spring (1), which is used to laterally arrange the inner friction plate and the outer friction plate. At least one end of the support spring (1) is fixedly connected to a support wing (2) with elastic recovery capability. The support wing (2) is axially arranged. The support wing (2) includes a fixing part (4) in the middle and support ears (3) formed on both sides of the fixing part (4). The fixing part (4) and the support spring (1) are fixedly connected. The support ears (3) are used to support the inner friction plate and the outer friction plate respectively. The support ears (3) include a first support port (5) at the end for supporting the back plate on which the friction plate is installed. The first support port (5) is formed by a first limiting piece (6) and a second limiting piece (7). The first limiting piece (6) and the second limiting piece (7) form an "L" shape with each other. The first limiting piece (6) is used to fit with the inner side of the back plate, and the second limiting piece (7) is used to fit with the back side of the back plate clamp.

2. The spring structure for the return of friction pads in a disc brake according to claim 1, characterized in that: The support ear (3) also includes an anti-fatigue part (8) for connecting with the connecting part (10) and a connecting part (10) for connecting the anti-fatigue part (8) and the first support port (5). The bend at the connection between the connecting part (10) and the first support port (5) faces inward, and the bend at the connection between the connecting part (10) and the anti-fatigue part (8) faces outward.

3. A spring structure for the return of friction pads in a disc brake according to claim 2, characterized in that: The fatigue-resistant part (8) has a "C" shaped structure, and the "C" shaped structure forms a deformation opening (11).

4. A spring structure for the return of friction pads in a disc brake according to claim 2, characterized in that: The distance between the two ends of the fatigue-resistant part (8) is less than the maximum radial dimension of the fatigue-resistant part (8).

5. A spring structure for the return of friction pads in a disc brake according to claim 2, characterized in that: The support wing (2) is an integrally formed elastic spring structure; the fixing part (4) and the support spring (1) are fixed by riveting, welding or screwing.

6. A spring structure for the return of friction pads in a disc brake according to claim 1, characterized in that: The end of the first limiting piece (6) is bent to form a hook (12). The hook (12) is used to cooperate with the positioning groove on the brake block and the back plate to reduce the swing between the spring structure and the back plate. The height of the small hook (12) is between 2mm and 4mm.

7. A spring structure for the return of friction pads in a disc brake according to claim 1, characterized in that: A clearance notch (13) is formed at the connection between the connecting part (10) and the second limiting piece (7).

8. A caliper, equipped with a spring structure for returning the friction pad of a disc brake as described in any one of claims 1 to 7, wherein there are two supporting springs (1); one end of the spring structure is provided with a supporting wing (2), and the other end of the supporting wing (2) is fixedly connected to the caliper body or limited and supported on the caliper body; the back plate connecting the friction pad is provided with a shaft hole (14) for installing a guide rod and a counterweight hole (15) for installing a counterweight.

9. The caliper according to claim 8, characterized in that: Guide rods (17) are also fixedly installed on the clamp body. The number of guide rods (17) corresponds one-to-one with the number of shaft holes (14). The shaft holes (14) are fitted on the guide rods (17). Each back plate has shaft holes (14) at both ends.

10. The caliper according to claim 8, characterized in that: The clamp body is a one-piece molded structure.

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