Disc brake caliper of low-speed moped

Abstract

The utility model discloses a disc brake caliper of a low-speed moped. The disc brake caliper comprises a symmetrical caliper body, a guide pin, a piston set and a brake pad. The piston set is provided with a barrel-shaped piston body and an elastic small piston (cone frustum rubber body) embedded in the barrel-shaped piston body, and braking force gradient adjustment is achieved through elastic compression of the small piston. In a non-braking state, a shifting elastic piece (comprising a vertical and horizontal positioning plate and a U-shaped elastic push strip) on the guide pin is matched with a reset spring, so that the brake pad is rapidly separated and reset. The problems that an existing single-piston rigid structure suddenly changes in braking force and is delayed in reset are solved, the braking stability, the control precision and the response speed are improved, and the system is suitable for safe braking of the low-speed moped.

Description

Technical Field

[0001] This utility model relates to the field of electric vehicle braking technology, and in particular to a disc brake caliper for a low-speed power-assisted bicycle. Background Technology

[0002] Low-speed electric bicycle single-piston disc brake calipers achieve braking by having a piston inside the caliper push the brake pads on both sides to clamp the disc. Its core structure consists of the caliper body, guide pins to constrain the caliper's axial sliding, hydraulically driven piston assembly, brake pad friction braking, and a heat dissipation structure to suppress heat fade. Existing motorcycle braking systems mostly use a single rigid piston structure. During braking, hydraulic pressure directly pushes the piston into contact with the brake pads, posing a risk of sudden changes in braking force and causing a reset delay, making it difficult to precisely control the braking process. Utility Model Content

[0003] To address the aforementioned problems, the purpose of this invention is to provide a low-speed electric bicycle disc brake caliper that achieves gradient adjustment of braking force through multiple pistons and can also quickly reset.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a low-speed power-assisted bicycle disc brake caliper, comprising: a caliper body, which is a symmetrical housing connected by connecting bolts, and an internal hydraulic chamber and brake pad guide groove; a guide pin, passing through the caliper body and fitted with a pin, wherein the brake pad is sleeved on the guide pin and slides along the brake pad guide groove; a piston assembly, disposed within the hydraulic chamber, comprising a piston body and an elastic compressible small piston embedded within the piston body, the small piston contacting the brake pad; and, in the non-braking state, a fixed lever is sleeved on the guide pin. The release spring is located between two brake pads and includes longitudinal and transverse positioning plates and symmetrically arranged elastic push bars. One side of the elastic push bar is U-shaped, and a return spring is provided between the two elastic push bars. The return spring is sleeved on the guide pin. The longitudinal and transverse positioning plates include a support bar connected to the elastic push bar, a first transverse plate at one end of the support bar, a longitudinal plate at the other end of the support bar that is bent downward, and a second transverse plate with an L-shaped cross section connected to the end of the longitudinal plate. The longitudinal and transverse positioning plates achieve vertical positioning by sliding contact with the inner wall of the brake pad guide groove through the first transverse plate and the second transverse plate.

[0005] The caliper body housing has a symmetrical split structure.

[0006] The piston body has a barrel-shaped structure.

[0007] The small piston is a truncated cone-shaped rubber elastomer. Its large circular base is embedded in the inner cavity of the piston body, and its small circular dome contacts the brake pad. The brake pad is positioned by inserting it into the brake pad guide groove through the vertical part of the longitudinal and transverse positioning plates.

[0008] The beneficial effects of this utility model are:

[0009] 1. The small piston's elastic compression achieves gradient adjustment of braking force, avoiding sudden changes;

[0010] 2. The release spring and the return spring work together to quickly separate and reset the brake pads, improving braking control accuracy and response speed, and suppressing heat fade.

[0011] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0012] Figure 1 This is a perspective view of a specific embodiment of the present utility model;

[0013] Figure 2 This is a cross-sectional view of a specific embodiment of the present utility model;

[0014] Figure 3 This is a perspective view of the spring piece being deflected in a specific embodiment of this utility model.

[0015] Explanation of reference numerals in the attached drawings: 1-caliper body; 2-guide pin; 3-piston assembly; 31-piston body; 32-small piston; 4-brake pad; 5-release spring; 51-longitudinal and transverse positioning plates; 511-support bar; 512-first transverse plate; 513-longitudinal plate; 514-second transverse plate; 52-elastic push bar; 6-reset spring; 7-connecting bolt; 8-pin. Detailed Implementation

[0016] The present invention will be described in detail below through embodiments, which are only used to further illustrate the present invention and should not be construed as limiting the scope of protection of the present invention.

[0017] like Figure 1 — Figure 3 As shown, this embodiment discloses a low-speed electric bicycle disc brake caliper, including:

[0018] The caliper body 1 is a symmetrical housing, which is connected by connecting bolts 7. It has a hydraulic chamber and a brake pad guide groove inside.

[0019] Guide pin 2 passes through caliper body 1 and is equipped with pin 8. Brake pad 4 is sleeved on guide pin 2 and is positioned and slid along brake pad guide groove.

[0020] Piston assembly 3, located in hydraulic chamber, includes piston body 31 and elastic compressible small piston 32 embedded in piston body 31, small piston 32 is in contact with brake pad 4.

[0021] In the non-braking state, a release spring 5 is fixedly sleeved on the guide pin 2. The release spring 5 is located between the two brake pads 4 and includes longitudinal and transverse positioning plates 51 and symmetrically arranged elastic push bars 52. One side of the elastic push bar 52 is U-shaped to improve the stability of pushing the brake pad 4 back to its original position. A return spring 6 is provided between the two elastic push bars 52. The return spring 6 can assist the two elastic push bars 52 in opening and improve the brake pad return speed. The return spring 6 is sleeved on the guide pin 2. The longitudinal and transverse positioning plates 51 include a support bar 511 connected to the elastic push bar 52, a first transverse plate 512 at one end of the support bar 511, a longitudinal plate 513 at the other end of the support bar 511 that is bent downward, and a second transverse plate 514 with an L-shaped cross section connected to the end of the longitudinal plate 513. The longitudinal and transverse positioning plates 51 achieve vertical positioning by sliding contact with the inner wall of the brake pad guide groove through the first transverse plate 512 and the second transverse plate 514.

[0022] The piston body 31 has a barrel-shaped structure.

[0023] The small piston 32 is a rubber elastomer with a truncated cone structure. Its large round bottom is embedded in the inner cavity of the piston body 31, and its small round top contacts the brake pad 4.

[0024] The release spring 5 is positioned by inserting it into the brake pad guide groove through the vertical part of the longitudinal and transverse positioning plate 51.

[0025] Working principle: During braking, hydraulic oil drives the piston body 31 to move, and the small dome on the small piston 32 engages with the brake pads, thereby compressing the small piston 32. The small piston 32, through its elasticity, drives the two brake pads to act on the brake disc first, at which point the braking force gradually increases. Finally, the end face of the piston body 31 adheres to the brake pads 4, resulting in double pressure braking, at which point the braking force is at its maximum. This gradual increase in braking force avoids instantaneous lock-up. When the brake is released, the return spring 6 and the release spring 5 push the brake pads, small piston 32, and piston body 31 back to their original positions quickly.

[0026] By adopting the above technical solution, the following technical effects can be achieved: the elastic compression of the small piston realizes the gradient adjustment of braking force and avoids sudden changes; the synergistic action of the release spring and the return spring enables the brake pads to quickly separate and return, improving the braking control accuracy and response speed, and suppressing thermal fade.

Claims

1. A disc brake caliper for a low-speed moped, characterized in that, The utility model relates to a kind of brake caliper, including: Caliper body (1), for symmetrical shell, shell is connected by connecting bolt (7) between, inside is equipped with hydraulic chamber and brake pad guide slot; Guide pin (2), pass through the caliper body (1) and be configured to latch, the brake pad (4) is set in guide pin (2) and is positioned sliding along brake pad guide slot; Piston group (3), be equipped in the hydraulic chamber, including piston body (31) and the elastic compressible small piston (32) embedded in piston body (31), the small piston (32) is in contact with brake pad (4); Non-braking state, fixedly connected to the push-off elastic sheet (5) is set on guide pin (2), the push-off elastic sheet (5) is equipped between two brake pads (4), including vertical positioning plate (51) and symmetrically arranged elastic push strip (52), one side of elastic push strip (52) is "U” type, reset spring (6) is equipped between two elastic push strips (52), the reset spring (6) is set in guide pin (2);The vertical positioning plate (51) includes the branch (511) being connected with elastic push strip (52), the first horizontal plate (512) of branch (511) one end, the vertical plate (513) being bent downward in the other end of branch (511) and longitudinal, and the second horizontal plate (514) of the end of vertical plate (513) connection, the vertical positioning plate (51) is slidably contacted with brake pad guide slot inner wall by first horizontal plate (512) and second horizontal plate (514) and realizes vertical positioning.

2. The scooter disc brake caliper according to claim 1, wherein The piston body (31) is barrel structure.

3. The scooter disc brake caliper according to claim 1, wherein The small piston (32) is rubber elastic body of circular truncated cone structure, its large circle bottom is embedded in the inner cavity of piston body (31), and small circle top is in contact with brake pad (4).

4. The scooter brake caliper according to claim 1, wherein The push-off elastic sheet (5) is inserted into brake pad guide slot by vertical part of vertical positioning plate (51) and realizes positioning.

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