One-way valve type hydraulic braking direct-pushing main cylinder for motorcycle
By introducing a one-way valve structure into the direct-drive master cylinder of the motorcycle hydraulic brake, the problems of increased piston fluid demand and return oil volume are solved, thereby improving braking feel and braking effect.
Patent Information
- Application Number
- CN202520830771.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-28
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-04-28
AI Technical Summary
In existing motorcycle hydraulic master cylinders, a larger piston leads to an increase in the required hydraulic fluid volume and return oil volume, but the size of the throttle orifice and compensation orifice cannot be increased, resulting in a slower throttle return oil speed and a worse braking feel.
Design a one-way valve type hydraulic brake direct-push master cylinder for motorcycles. By setting a through hole on the piston and cooperating with the front piston cup, a one-way valve structure is formed, which allows the oil to flow into the front chamber in one direction during the piston movement, meeting the required fluid volume and improving the braking feel.
By optimizing piston movement through a one-way valve structure, the braking feel is enhanced, the piston's fluid requirements are met, and the braking effect is improved.
Smart Images
Figure CN223949298U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to motorcycle brake technical field, concretely relates to a one-way valve type hydraulic braking straight push master cylinder for motorcycle. BACKGROUND
[0002] At present, the hydraulic master cylinder of motorcycle is mainly side push type and straight push type, the piston movement direction of straight push type is consistent with the action direction of brake handle 9, which makes its action distance and piston movement stroke present linear relationship, and the operation is more direct, while the piston movement direction of side push type, as a common configuration of small and medium displacement motorcycle, is perpendicular to the action direction of brake handle 9, and there is a certain torsion angle, so its action distance and piston movement stroke present nonlinear relationship, and the operation feeling is different. Due to the reasons of surrounding arrangement and overall handle lever, the piston stroke of straight push type is short, and a large diameter piston is usually used, and at the same time, a problem is derived, that is, the larger the piston, the more the liquid and oil return quantity increase, but the size of throttle hole (diameter 0.5mm) and compensation hole (diameter 3mm) is fixed in the design process and cannot be increased, so that the oil return speed of throttle hole cannot meet the liquid requirement of piston cylinder, thereby the oil return speed is slow, and the brake hand feeling is poor. SUMMARY
[0003] Therefore, the utility model discloses a one-way valve type hydraulic braking straight push master cylinder for motorcycle, which is used to solve the problem that the larger piston causes the increase of liquid and oil return quantity, but the size of throttle hole and compensation hole cannot be increased, so that the oil return speed of throttle hole is slow, and the brake hand feeling is poor.
[0004] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme.
[0005] The utility model provides a one-way valve type hydraulic braking straight push master cylinder for motorcycle, which comprises a piston cylinder and a piston slidingly connected in the piston cylinder, a cavity is arranged in the piston cylinder, the piston is slidingly connected with the cavity, a spring is fixedly connected between the piston and the inner wall of the cavity, a through hole penetrating through the piston along the axial direction of the piston is arranged on the piston, a front leather cup with a V-shaped cross section is limitingly and slidingly connected on the piston, and an annular gap is arranged between the front leather cup and the inner wall of the cavity.
[0006] Further, a lengthening part fixed as a whole with the piston is coaxially arranged on the piston, the diameter of the lengthening part is smaller than that of the piston, the front leather cup is slidingly sleeved on the lengthening part, a limiting sheet is fixedly connected on the lengthening part, and the front leather cup is located between the limiting sheet and the piston.
[0007] Further, an annular clamping groove is arranged on the lengthening part, and the limiting sheet is clamped and fixed in the annular clamping groove.
[0008] Further, the limiting sheet is a snap spring.
[0009] Further, the piston is provided with an installation groove extended axially by an extension part, the spring seat extended into the installation groove is fixedly connected to the inner bottom wall of the cavity, the spring sleeve is arranged on the spring seat, one end of the spring is fixedly connected to the spring seat, and the other end of the spring is fixedly connected to the inner wall of the installation groove.
[0010] Further, the rear leather bowl is fixedly connected to the piston away from the spring side, and the rear leather bowl is arranged to close the cavity section.
[0011] The piston cylinder of the utility model has the advantages that:
[0012] The utility model discloses a through hole and front leather bowl cooperation, make piston form one-way valve structure in reciprocating movement, make the oil in the compensation hole can enter the front chamber when driving piston to move and stretch spring when braking by brake handle, satisfy the liquid amount of front chamber, thereby improve the brake hand feeling.
[0013] The other advantages, objects and features of the utility model will be set forth in the subsequent specification, and will be apparent to those skilled in the art from the utility model and the practice thereof, or can be learned by those skilled in the art from the utility model. The objects and other advantages of the utility model can be realized and obtained by the following description. BRIEF DESCRIPTION OF DRAWINGS
[0014] In order to make the purpose, technical scheme and beneficial effect of the utility model more clear, the utility model provides the following drawings for explanation:
[0015] Fig. 1 It is piston cylinder installation schematic view of the utility model embodiment;
[0016] Fig. 2 It is piston cylinder structure sectional view of the utility model embodiment;
[0017] Fig. 3 It is cavity internal structure explosion map of the utility model embodiment.
[0018] The marks in the drawings are as follows: piston cylinder 1, cavity 101, throttle hole 102, compensation hole 103, oil delivery pipe 104, oil cylinder 2, piston 3, through hole 301, extension part 302, limiting sheet 303, annular clamping groove 304, installation groove 305, spring 4, front leather bowl 5, piston valve sheet 6, spring seat 7, rear leather bowl 8, brake handle 9. DETAILED DESCRIPTION
[0019] As Figs. 1-3As shown, the utility model provides a one -way valve formula hydraulic brake straight -push master cylinder for motorcycle, include: piston cylinder 1, be provided with cavity 101 in piston cylinder 1, the cavity 101 is connected with oil pipe 104 through throttle hole 102 and compensation hole 103, wherein, cavity 101 is fixedly connected with oil cylinder 2 through oil pipe 104, and the throttle hole 102 and compensation hole 103 along cavity 101 radial setting are all conventional technical means in the field, do not repeat here, slidingly installed have piston 3 in the cavity 101, spring 4 is fixedly connected between piston 3 and the cavity 101 inner wall, the through -hole 301 that is along piston 3 axial penetrates piston 3 is provided on piston 3, the front leather bowl 5 of cross section V -shaped is limitingly connected to piston 3 on, be provided with annular gap between front leather bowl 5 and the cavity 101 inner wall.
[0020] In the scheme, the initial position of the piston 3 is located between the throttle hole 102 and the compensation hole 103, when the piston 3 is pulled by the brake handle 9, the spring 4 is stretched, so that the oil in the rear chamber on the side of the piston 3 close to the brake handle 9 enters the through-hole 301 and extrudes the front leather bowl 5, so that the front leather bowl 5 opens the through-hole 301, when the piston 3 moves to the side of the compensation hole 103 close to the brake handle 9, the oil in the compensation hole 103 can enter the front chamber on the side of the piston 3 close to the spring 4 to compensate, so as to meet the oil requirement of the front chamber; after the brake is finished, the spring 4 drives the piston 3 to reset, so that the front leather bowl 5 is extruded by the oil pressure in the front chamber, and because the cross section of the front leather bowl 5 is V-shaped and has elasticity, the front leather bowl 5 expands and abuts against the inner wall of the cavity 101 to close the cross section of the cavity 101, and the front leather bowl 5 is pushed to move to the direction close to the through-hole 301 to close the through-hole 301.
[0021] The scheme cooperates the through-hole 301 with the front leather bowl 5, so that the piston 3 forms a one-way valve structure during reciprocating movement, so that when braking by the brake handle 9, the piston 3 is driven to move and stretch the spring 4, so that the oil in the compensation hole 103 can enter the front chamber to meet the oil requirement of the front chamber, thereby improving the brake feel.
[0022] In an embodiment of the utility model, the piston 3 is coaxially provided with an extension 302 fixedly integrated with the piston 3, the diameter of the extension 302 is smaller than the diameter of the piston 3, the front leather bowl 5 is slidingly sleeved on the extension 302, a limiting sheet 303 is fixedly connected on the extension 302, and the front leather bowl 5 is located between the limiting sheet 303 and the piston 3. To limit the front leather bowl 5.
[0023] In an embodiment of the utility model, the extension 302 is provided with an annular clamping groove 304, the limiting sheet 303 is clamped and fixed in the annular clamping groove 304, and the limiting sheet 303 is a clamping spring. To facilitate the installation of the limiting sheet 303.
[0024] In an embodiment of the utility model, the piston 3 is provided with a plurality of through holes 301 around the piston 3 axis, the front leather cup 5 and the piston 3 are provided with the piston valve piece 6 sleeved on the extension part 302, the piston valve piece 6 can close all through holes 301.
[0025] In the scheme, the oil compensation ability is improved by the plurality of through holes 301, and the piston valve piece 6 is arranged, when the front leather cup 5 moves along the direction close to the through hole 301, all through holes 301 are closed by extruding the piston valve piece 6, and the full sealing ability of the through hole 301 is ensured.
[0026] In an embodiment of the utility model, the piston 3 is provided with the installation groove 305 extended axially by the extension part 302, the spring seat 7 extended into the installation groove 305 is fixedly connected to the inner bottom wall of the cavity 101, the spring 4 is sleeved on the spring seat 7, one end of the spring 4 is fixedly connected with the spring seat 7, and the other end of the spring 4 is fixedly connected with the inner wall of the installation groove 305.
[0027] In the scheme, the stability of the spring 4 in the deformation process is improved by the cooperation of the spring seat 7 and the installation groove 304.
[0028] In an embodiment of the utility model, the rear leather cup 8 is fixedly connected to the side of the piston 3 away from the spring 4, and the rear leather cup 8 is arranged to close the cross section of the cavity 101. The rear leather cup 8 is arranged to improve the sealing performance of the cavity 101.
Claims
1. A hydraulic brake straight push master cylinder for a motorcycle of a one-way valve type, comprising a piston cylinder and a piston slidably connected in the piston cylinder, characterized in that: The piston cylinder is internally provided with a cavity, the piston is in sliding connection with the cavity, a spring is fixedly connected between the piston and the inner wall of the cavity, a through hole penetrating the piston along the axial direction of the piston is arranged on the piston, a front leather cup with a V-shaped cross section is in sliding connection with the piston, and an annular gap is arranged between the front leather cup and the inner wall of the cavity.
2. The hydraulic brake straight push master cylinder for a motorcycle according to claim 1, characterized by: A lengthening part fixedly connected with the piston as a whole is coaxially arranged on the piston, the diameter of the lengthening part is smaller than that of the piston, the front leather cup is slidably sleeved on the lengthening part, and a limiting sheet is fixedly connected to the lengthening part.
3. The hydraulic brake straight push master cylinder with a one-way valve for a motorcycle according to claim 2, characterized in that: An annular clamping groove is arranged on the lengthening part, and the limiting sheet is clamped and fixed in the annular clamping groove.
4. The hydraulic brake straight push master cylinder with a one-way valve for a motorcycle according to claim 3, characterized in that: The limiting sheet is a clamping spring.
5. The hydraulic brake straight push master cylinder with a one-way valve for a motorcycle according to claim 4, characterized in that: An installation groove axially extended from the lengthening part is arranged on the piston, a spring seat extended into the installation groove is fixedly connected to the bottom wall of the cavity, a spring is sleeved on the spring seat, one end of the spring is fixedly connected with the spring seat, and the other end of the spring is fixedly connected with the inner wall of the installation groove.
6. The hydraulic brake straight push master cylinder for a motorcycle according to claim 1, characterized in that: A rear leather cup is fixedly clamped to the side of the piston away from the spring, and the rear leather cup is arranged in a closed cavity cross section.