Oil pressure disc brake for bicycle

Abstract

The utility model discloses a bicycle oil pressure disc brake, contain: handle main part, oil pump can be separatedly installed on handle main part, brake handle is pivoted on handle main part, with the output brake oil of trigger oil pump through swing relative handle main part, wherein, oil pump contains: the pump main body with oil storage cavity and oil outlet channel, with the piston of oil storage cavity sliding cooperation and between pump main body and piston's elastic part, wherein, the inner peripheral side of cavity wall of oil storage cavity and the outer peripheral side of piston, set up the glide part of reducing the glide resistance of piston. The bicycle oil pressure disc brake of the present application, oil pump is independent forming, then can be separatedly installed on handle main part, and oil pump can be replaced, and setting glide part is favorable to reduce the noise when piston activity.

Description

Technical Field

[0001] This utility model relates to bicycle braking technology, specifically to a hydraulic disc brake for bicycles. Background Technology

[0002] With the increasing popularity of road cycling, consumers are showing greater demand for bicycle braking technology. Common cable-operated V-brakes or cable-operated disc brakes are no longer sufficient for some consumers, who desire hydraulic disc brakes for a better braking experience. A common design approach for hydraulic disc brakes is to integrate the hydraulic pump with the handlebar, machining it as a single unit. While this solution is low-cost and efficient, it requires manufacturers with strong manufacturing capabilities to ensure consistent quality. If the hydraulic pump malfunctions, it is essentially unrepairable and must be scrapped along with the handlebar, resulting in high wear and tear. Another existing design approach involves machining the hydraulic pump independently and then mounting it to the handlebar. This application aims to provide a hydraulic disc brake employing this design approach. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a solution for a hydraulic disc brake with an independently machined pump body.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a hydraulic disc brake for bicycles, comprising: a handlebar body; an oil pump detachably mounted on the handlebar body; and a brake lever pivotally connected to the handlebar body to trigger the oil pump to output brake oil by swinging relative to the handlebar body; wherein the oil pump comprises: a pump body having an oil reservoir and an oil outlet channel, a piston slidingly engaged with the oil reservoir, and an elastic element located between the pump body and the piston; wherein a sliding aid portion for reducing the sliding resistance of the piston is provided between the inner circumferential side of the wall of the oil reservoir and the outer circumferential side of the piston.

[0005] Preferably, the lubrication aid is a metal tube insert disposed on the inner circumferential side of the cavity wall of the oil storage cavity.

[0006] Preferably, the pump body has an auxiliary oil chamber, and a first connecting hole and a second connecting hole are provided between the oil reservoir and the auxiliary oil chamber. One of the first connecting hole and the second connecting hole is used to guide the brake fluid to flow between the oil reservoir and the auxiliary oil chamber, and the other is used to vent air when the brake fluid flows.

[0007] Preferably, the pump body is provided with a cover that covers the auxiliary oil chamber, and a buffer that can adaptively deform with changes in the volume of the brake fluid is provided between the cover and the auxiliary oil chamber.

[0008] Preferably, the pump body has an oil inlet channel communicating with the oil storage chamber, and an inlet plug is provided at the inlet end of the oil inlet channel.

[0009] Preferably, the pump body has a drain channel communicating with the oil storage chamber, and the outlet end of the drain channel is provided with an outlet plug.

[0010] Preferably, the oil outlet channel and the sewage discharge channel have overlapping inlet sections.

[0011] Preferably, the handle body has an oil pump receiving cavity for accommodating the oil pump, and the handle body is provided with a first cover that covers the oil pump receiving cavity.

[0012] Preferably, the handle body has a battery housing cavity for accommodating a rechargeable battery module, and a second cover is provided on the battery housing cavity to cover the battery housing cavity.

[0013] Preferably, the handle body is fitted with a detachable outer sleeve.

[0014] Due to the adoption of the above technical solutions, this utility model has the following beneficial effects: 1. The hydraulic disc brake for bicycles of this application has an independently molded hydraulic pump that can be detachably installed on the handlebar body, and the hydraulic pump can be replaced; 2. For pump bodies made by injection molding, the walls of the oil reservoir are relatively rough. This application solves the problem of abnormal noise caused by friction between the sealing ring on the piston and the oil reservoir when the piston moves by setting a lubrication part between the inner circumferential side of the oil reservoir wall and the outer circumferential side of the piston. 3. The oil outlet channel and the sewage discharge channel have overlapping inlet sections, making the overall structure of the oil pump more compact. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly introduced below. Obviously, the drawings described below only involve some embodiments of this utility model, and are not intended to limit this utility model.

[0016] Figure 1 A schematic diagram illustrating an embodiment of a hydraulic disc brake for bicycles mounted on bicycle handlebars is shown. Figure 2 A schematic diagram of an embodiment of a hydraulic disc brake for a bicycle is shown; Figure 3 A first exploded view of an embodiment of a hydraulic disc brake for a bicycle is shown; Figure 4 A second exploded view of an embodiment of a hydraulic disc brake for a bicycle is shown; Figure 5A third exploded view of an embodiment of a hydraulic disc brake for a bicycle is shown; Figure 6 A fourth exploded view of an embodiment of a hydraulic disc brake for a bicycle is shown; Figure 7 A schematic diagram of an oil pump for a hydraulic disc brake for a bicycle according to one embodiment is shown; Figure 8 A first exploded view of a hydraulic pump for a hydraulic disc brake for a bicycle, according to one embodiment, is shown. Figure 9 A second exploded view of a hydraulic pump for a hydraulic disc brake for a bicycle, according to one embodiment, is shown. Figure 10 A cross-sectional view of the oil pump for a hydraulic disc brake for a bicycle according to one embodiment is shown; Figure 11 A first cross-sectional view of the pump body of a hydraulic pump for a bicycle hydraulic disc brake according to an embodiment is shown; Figure 12 A second cross-sectional view of the pump body of a hydraulic pump for a bicycle hydraulic disc brake according to one embodiment is shown.

[0017] Figure label: Handle body 1, oil pump 2, pump body 2A, piston 2B, elastic element 2C, buffer element 2D, cover 2E, oil pipe connector 2F, outlet plug 2G, gliding part 2H, inlet plug 2I, brake lever 3, first cover 4, second cover 5, outer kit 6, handle connector 7, rechargeable battery module 8, pin 9. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings. The components of the embodiments of this utility model described and shown in the accompanying drawings can be arranged and designed in various different configurations. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0019] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the features in the following embodiments can be combined with each other.

[0020] Combination Figure 1 The hydraulic disc brake N for bicycles described in this application can be installed on the handlebars M of a bicycle. Figure 1 Only the portion of the bicycle hydraulic disc brake mounted on the handlebar M is shown; the brake pad structure mounted on the bicycle wheel is omitted. Further integration... Figures 2 to 6The bicycle hydraulic disc brake N of this embodiment includes a handlebar body 1, an oil pump 2, a brake lever 3, a first cover 4, a second cover 5, an outer sleeve 6, a handlebar connector 7, a rechargeable battery module 8, and a pin 9.

[0021] The handle body 1 has an oil pump accommodating cavity P1 and a battery accommodating cavity P2.

[0022] The oil pump 2 is detachably mounted within the oil pump housing P1 of the handle body 1 and is held in place by a first cover 4 that covers the oil pump housing P1. The first cover 4 is mounted to the handle body 1 by fastening screws, and can be detached from the handle body 1 after the fastening screws are removed. Figures 7 to 12 The oil pump 2 includes a pump body 2A, a piston 2B, an elastic element 2C, a buffer element 2D, a cover 2E, an oil delivery pipe joint 2F, an outlet plug 2G, a lubrication aid 2H, and an inlet plug 2I.

[0023] The pump body 2A has an oil reservoir T1, an auxiliary oil reservoir T2, an oil outlet channel L1, an oil inlet channel L2, and a drain channel L3. A first connecting hole S1 and a second connecting hole S2 are provided between the oil reservoir T1 and the auxiliary oil reservoir T2. One of the first connecting hole S1 and the second connecting hole S2 is used to guide the brake fluid flow between the oil reservoir T1 and the auxiliary oil reservoir T2, and the other is used to vent air during brake fluid flow. The oil outlet channel L1, the oil inlet channel L2, and the drain channel L3 are all connected to the oil reservoir T1 and are used for brake fluid outflow, brake fluid addition, and draining of sludge, respectively. Figure 11 In this embodiment, the inlet sections of the oil outlet channel L1 and the sewage outlet channel L3 overlap, making the overall structure of the oil pump more compact. An inlet plug 2I is provided at the inlet end of the oil inlet channel L2, and an outlet plug 2G is provided at the outlet end of the sewage outlet channel L3. An oil delivery pipe connector 2F is connected to the outlet end of the oil outlet channel L1 for connecting an oil guide pipe (not shown). The pump body 2A can be an injection-molded structure.

[0024] Piston 2B slides within the reservoir T1, with one end extending from the reservoir T1. When the brake lever 3 is swung, it is triggered to output brake fluid. A sliding aid 2H is positioned between the inner circumference of the reservoir T1 wall and the outer circumference of piston 2B to reduce the sliding resistance of piston 2B. In this embodiment, the sliding aid 2H is a metal tubular insert, such as a copper insert, positioned on the inner circumference of the reservoir T1 wall. A seal Q is fitted onto piston 2B to prevent brake fluid leakage.

[0025] The elastic element 2C is located between the pump body 2A and the piston 2B, and is used to provide the elastic force for the piston 2B to return to its original position.

[0026] The cover 2E is detachably mounted on the pump body 2A and is used to cover the auxiliary oil chamber T2. The cover 2E and the auxiliary oil chamber T2 are provided with a buffer 2D. The volume of brake fluid changes with temperature. The buffer 2D can adaptively deform with the change of brake fluid volume. By setting the buffer 2D, the pressure change caused by the change of brake fluid volume can be released. The buffer 2D is, for example, a buffer made of rubber.

[0027] The brake lever 3 is pivotally connected to the handlebar body 1 via a pin 9, so that the oil pump 2 is triggered to output brake oil by swinging relative to the handlebar body 1. In this embodiment, the brake lever 3 includes a brake lever body 3A and a gear shifter 3B. The gear shifter 3B can be used to switch the state of the bicycle's derailleur. The setting of the gear shifter 3B on the brake lever 3 is existing technology, which can be understood by referring to the prior art such as patent application CN202210266654.3, and will not be described in detail here.

[0028] The outer sleeve 6 is detachably fitted onto the handle body 1. The outer sleeve 6 has anti-slip texture to increase the friction when the hand contacts it.

[0029] The handlebar connector 7 is connected to the handlebar body 1 and can be fitted onto the bicycle handlebar M, thereby installing the bicycle hydraulic disc brake N onto the handlebar M.

[0030] The rechargeable battery module 8 is detachably installed within the battery housing P2 of the handle body 1 and held in place by a second cover 5 that covers the battery housing P2. The second cover 5 is pivotally connected to the handle body 1 and is secured to it by fastening screws. The rechargeable battery module 8 includes a battery component 8A, a charging connector 8B, a first limiting block 8C, and a second limiting block 8D. The first limiting block 8C positions the battery component 8A within the battery housing P2, and the second limiting block 8D positions the charging connector 8B within the battery housing P2. The charging connector 8B is, for example, a common USB type interface, and will not be described further.

[0031] The hydraulic disc brake for bicycles disclosed in this application has an independently molded oil pump that can be detachably installed on the handlebar body, and the oil pump can be replaced. For pump bodies that are injection molded, the walls of the oil reservoir are relatively rough. This application solves the problem of abnormal noise caused by friction between the sealing ring on the piston and the oil reservoir when the piston moves by setting a lubrication part between the inner circumference of the oil reservoir wall and the outer circumference of the piston.

[0032] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A hydraulic disc brake for bicycles, comprising: handle body(1); Oil pump (2), which is detachably mounted on the handle body (1); Brake lever (3), which is pivotally connected to the handle body (1), so as to trigger the oil pump (2) to output brake oil by swinging relative to the handle body (1); Its features are, in, The oil pump (2) includes: a pump body (2A) having an oil reservoir (T1) and an oil outlet channel (L1), a piston (2B) that slides with the oil reservoir (T1), and an elastic element (2C) located between the pump body (2A) and the piston (2B); Among them, a lubrication part (2H) is provided between the inner peripheral side of the cavity wall of the oil storage chamber (T1) and the outer peripheral side of the piston (2B) to reduce the sliding resistance of the piston (2B).

2. The hydraulic disc brake for bicycles according to claim 1, characterized in that, The lubrication aid (2H) is a metal tube insert disposed on the inner circumferential side of the cavity wall of the oil storage cavity (T1).

3. The hydraulic disc brake for bicycles according to claim 1, characterized in that, The pump body (2A) has an auxiliary oil chamber (T2). A first connecting hole (S1) and a second connecting hole (S2) are provided between the oil reservoir (T1) and the auxiliary oil chamber (T2). One of the first connecting hole (S1) and the second connecting hole (S2) is used to guide the brake fluid to flow between the oil reservoir (T1) and the auxiliary oil chamber (T2), and the other is used to bleed air when the brake fluid flows.

4. The hydraulic disc brake for bicycles according to claim 3, characterized in that, The pump body (2A) is provided with a cover (2E) that covers the auxiliary oil chamber (T2), and a buffer (2D) that can adaptively deform with the change of brake fluid volume is provided between the cover (2E) and the auxiliary oil chamber (T2).

5. The hydraulic disc brake for bicycles according to claim 1, characterized in that, The pump body (2A) has an oil inlet channel (L2) that connects to the oil storage chamber (T1), and an inlet plug (2I) is provided at the inlet end of the oil inlet channel (L2).

6. The hydraulic disc brake for bicycles according to claim 1, characterized in that, The pump body (2A) has a drain channel (L3) that connects to the oil storage chamber (T1), and the outlet end of the drain channel (L3) is provided with an outlet plug (2G).

7. The hydraulic disc brake for bicycles according to claim 6, characterized in that, The entry sections of the oil outlet channel (L1) and the sewage discharge channel (L3) overlap.

8. The hydraulic disc brake for bicycles according to claim 1, characterized in that, The handle body (1) has an oil pump housing cavity (P1) for housing the oil pump (2), and a first cover (4) is provided on the handle body (1) to cover the oil pump housing cavity (P1).

9. The hydraulic disc brake for bicycles according to claim 1, characterized in that, The handle body (1) has a battery housing cavity (P2) for accommodating a rechargeable battery module (8), and a second cover (5) is provided on the battery housing cavity (P2) to cover the battery housing cavity (P2).

10. The hydraulic disc brake for bicycles according to claim 1, characterized in that, The pump body (2A) is an injection-molded structure.

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