Hydraulic brake master cylinder for center valve type motorcycle

Abstract

The utility model relates to the technical field of motorcycle brake parts, and discloses a hydraulic brake master cylinder for a center valve type motorcycle, which comprises a body, a first spring is fixedly mounted in the body, a spring seat is arranged in the body, a second spring is fixedly mounted in the spring seat, and a valve body is slidably connected in the spring seat. A valve element is inserted into the valve body, a piston is inserted into the body in a sliding mode, the outer side of the left end of the piston is sleeved with a front leather cup, and the outer side of the right end of the piston is sleeved with a rear leather cup. A traditional throttling hole mode is changed into a center valve mode, a compensation hole and a throttling hole are omitted, sealing failure caused by leather cup abrasion due to work of an ABS system, loss of braking performance after failure and influence on driving safety are avoided, meanwhile, the structure is optimized on the basis of the traditional center valve structure, the number of parts is reduced, the weight of a whole vehicle is increased, and the machining cost is reduced; and batch production can be met.

Description

TECHNICAL FIELD

[0001] The utility model relates to motorcycle brake technical field, concretely is a kind of hydraulic brake master cylinder for center valve type motorcycle. BACKGROUND

[0002] At present, motorcycle brake is mainly throttle hole type and traditional center valve type, throttle hole type is through brake handle to push piston, piston drives sealing leather bowl to sweep compensation hole, forms sealed chamber, traditional throttle hole type can exist a drawback, if matching ABS vehicle type, ABS actuates, leather bowl can sweep compensation hole frequently, can cause damage to leather bowl, lead to brake system pressure relief failure. Traditional center valve type structure is complex, and processing difficulty is high, cannot be used in mass production, therefore, can be further improved. SUMMARY

[0003] To solve the problems presented above, the utility model provides the following technical scheme: a kind of hydraulic brake master cylinder for center valve type motorcycle, including body, the inside of the body is fixedly installed with spring one, the inside of the body is provided with spring seat, and the spring seat is fixedly installed in the right end inside of spring one, the inside of the spring seat is fixedly installed with spring two, the inside of the spring seat is slidably connected with valve body, and the valve body is fixedly installed at the right end of spring two, the inside of the valve body is inserted with valve core, the middle part of the body is provided with control pin, the inside of the body is slidably inserted with piston, and the control pin is inserted in the right end of piston, the left end outside of the piston is equipped with front leather bowl, the right end outside of the piston is equipped with rear leather bowl, the right end in the body is screwed with push rod, the outside of the push rod is equipped with sealing seal.

[0004] As optimization, the right end outer diameter of the spring one is less than the left end outer diameter, and is arranged in tower type.

[0005] As optimization, the both ends of the piston are in close contact with the inner wall of the body.

[0006] As optimization, the front leather bowl and rear leather bowl are annular and respectively sleeved on the left and right ends of the piston, and are in elastic close contact with the inner wall of the body.

[0007] As optimization, one end of the push rod inside the body is abutted on the right side center of the piston.

[0008] As optimization, the seal includes sealing sleeve ring sleeved on the outside of the push rod, the outside of the sealing sleeve ring is provided with elastic sealing edge, and the sealing edge and the sealing sleeve ring have gap.

[0009] As optimization, the inner wall of the sealing sleeve ring is provided with several sealing bands, and the sealing bands are all made of rubber material.

[0010] The utility model discloses a beneficial effect: the center valve formula motorcycle hydraulic brake master cylinder, through by the traditional orifice form changes center valve formula, cancelled compensation hole and orifice, avoided ABS system work to cause leather cup wear to cause sealing failure, failure leads to loss of braking performance, influence driving safety, simultaneously optimizes structure on the traditional center valve structure, makes the number of parts reduces, increases whole car light weight, reduces processing cost, can satisfy the batch production, the center valve formula motorcycle hydraulic brake master cylinder, through pulling push rod reset, will make sealing edge be extruded, and then will along the clearance bending deformation, so will tightly contact cylinder inner wall and seal, simultaneously through the sealing band of sealing sleeve ring inside setting tightly contact push rod outside, and then can further improve the sealing property. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is structure schematic diagram of the utility model;

[0012] Figure 2 It is structure front cut schematic diagram of the utility model;

[0013] Figure 3 It is internal structure schematic diagram of the utility model;

[0014] Figure 4 It is sealing structure schematic diagram of the utility model.

[0015] In the drawing: 1, body;2, spring one;3, spring seat;4, spring two;5, valve body;6, valve core;7, control pin;8, piston;9, front leather cup;10, rear leather cup;11, push rod;12, sealing element;13, sealing sleeve ring;14, sealing edge;15, clearance;16, sealing band. DETAILED DESCRIPTION

[0016] In the description of the present application, it needs to be understood that the orientation or position relation indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or position relation shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0017] The technical solutions in the embodiments of the utility model will be described clearly and completely in combination with the drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0018] Please refer to Figures 1-3 A center valve type hydraulic brake master cylinder for motorcycle, including body 1, the inside of body 1 is fixedly installed with spring one 2, the right end of spring one 2 is smaller than the left end in diameter, and is arranged in a tower type, spring seat 3 is arranged in body 1, and spring seat 3 is fixedly installed in the right end of spring one 2, spring seat 3 is fixedly installed with spring two 4 in the inside, valve body 5 is slidably connected in the inside of spring seat 3, and valve body 5 is fixedly installed in the right end of spring two 4, valve core 6 is inserted in the inside of valve body 5, control pin 7 is arranged in the middle of body 1, piston 8 is slidably inserted in the inside of body 1, and control pin 7 is inserted in the right end of piston 8, the end faces of both ends of piston 8 are in close contact with the inner wall of body 1, front leather cup 9 is sleeved on the left end outside of piston 8, rear leather cup 10 is sleeved on the right end outside of piston 8, front leather cup 9 and rear leather cup 10 are annularly sleeved on the left and right end outside of piston 8 respectively, and they have elastic close contact with the inner wall of body 1, push rod 11 is screwed in the right end of body 1, and one end of push rod 11 in the inside of body 1 abuts against the right side center of piston 8, sealing element 12 is arranged on the outside of push rod 11 for sealing;

[0019] Please refer to Figure 4 Sealing element 12 includes sealing sleeve ring 13 sleeved on the outside of push rod 11, the outside of sealing sleeve ring 13 is provided with elastic sealing edge 14, there is gap 15 between sealing edge 14 and sealing sleeve ring 13, the gap 15 provides space for deformation of sealing edge 14 when it is extruded, so as to facilitate the close contact of the compressed and deformed sealing edge 14 with the inner wall and improve the sealing performance, and the inner wall of sealing sleeve ring 13 is provided with a plurality of sealing bands 16, and the sealing bands 16 are made of rubber material, which further improves the sealing performance by closely contacting the outside of push rod 11.

[0020] In use, in the initial state, spring one 2 is in a pre-pressed state, at this time, valve core 6 is pushed by control pin 7, and the brake chamber is in a flow-through state, when push rod 11 pushes piston 8 to move, the chamber is sealed due to the close contact between the end face of piston 8 and valve body 5, and then the brake starts to build pressure.

[0021] At the same time, by pulling the push rod 11 back, the sealing edge 14 is extruded and deformed along the gap 15, so as to closely contact the inner wall of the cylinder for sealing, and the sealing bands 16 arranged in the inside of the sealing sleeve ring 13 closely contact the outside of the push rod 11, thereby further improving the sealing performance.

[0022] In summary, the center valve type hydraulic brake master cylinder for motorcycle cancels the compensation hole and the throttle hole by changing the traditional throttle hole into the center valve type, avoids the seal failure caused by the skin bowl wear due to the ABS system work, and the loss of braking performance caused by the seal failure, which affects the driving safety. Meanwhile, the structure is optimized on the basis of the traditional center valve structure, the number of parts is reduced, the vehicle weight is reduced, the processing cost is reduced, and the mass production can be met.

[0023] By pulling the push rod 11 back, the sealing edge 14 will be extruded, and then it will be bent and deformed along the gap 15, so it will tightly contact the inner wall of the cylinder body for sealing. At the same time, the sealing band 16 inside the sealing sleeve ring 13 tightly contacts the outside of the push rod 11, which can further improve the sealing performance.

Claims

1. A central valve type hydraulic brake master cylinder for a motorcycle comprising a body (1), characterized in that: The inside of the body (1) is fixedly installed with spring one (2), the inside of the body (1) is provided with spring seat (3), and the spring seat (3) is fixedly installed in the right end of spring one (2), the inside of the spring seat (3) is fixedly installed with spring two (4), the inside of the spring seat (3) is slidably connected with valve body (5), and the valve body (5) is fixedly installed in the right end of spring two (4), the inside of the valve body (5) is inserted with valve core (6), the middle of the body (1) is provided with control pin (7), the inside of the body (1) is slidably inserted with piston (8), and the control pin (7) is inserted in the right end of the piston (8), the left end of the piston (8) is provided with front leather bowl (9), the right end of the piston (8) is provided with rear leather bowl (10), the right end of the body (1) is screwed with push rod (11), the outside of the push rod (11) is provided with sealing element (12).

2. Hydraulic brake master cylinder for motorcycles with central valve according to claim 1, characterized in that: The right end of the spring one (2) is smaller than the left end, which is in the form of a tower.

3. The central valve type hydraulic brake master cylinder for a motorcycle according to claim 1, characterized by: The two ends of the piston (8) are in close contact with the inner wall of the body (1).

4. The central valve type hydraulic brake master cylinder for a motorcycle according to claim 1, characterized by: The front leather bowl (9) and the rear leather bowl (10) are annular and are respectively sleeved on the left and right ends of the piston (8), and they are in elastic contact with the inner wall of the body (1).

5. The central valve type hydraulic brake master cylinder for a motorcycle according to claim 1, characterized by: The push rod (11) is located in the body (1) and abuts against the right side of the piston (8).

6. The central valve type hydraulic brake master cylinder for a motorcycle according to claim 1, characterized by: The sealing element (12) includes a sealing sleeve ring (13) sleeved on the outside of the push rod (11), the outside of the sealing sleeve ring (13) is provided with an elastic sealing edge (14), and the sealing edge (14) and the sealing sleeve ring (13) have a gap (15) therebetween.

7. A central valve type hydraulic brake master cylinder for a motorcycle according to claim 6, characterized in that: The inner wall of the sealing sleeve ring (13) is provided with a plurality of sealing bands (16), and the sealing bands (16) are all made of rubber material.

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