Immersion-proof self-adjusting gap brake wheel cylinder

Abstract

The application discloses a kind of anti-immersion self-adjusting gap brake wheel cylinder, including piston, dust cover, cylinder and leather bowl, dust cover is integrally provided with first piston sealing ring near the position of piston, the first tower type bending part is integrally arranged near the position of first piston sealing ring of dust cover, first piston sealing ring is arranged in piston dust cover recess, and first piston sealing ring is integrally provided with first waterproof convex rib on the side of piston dust cover recess part insertion;The second piston sealing ring is integrally arranged near the position of cylinder of dust cover, the second tower type bending part is integrally arranged near the position of second piston sealing ring of dust cover, the second piston sealing ring is arranged in cylinder dust cover recess, and the second piston sealing ring is integrally provided with second waterproof convex rib on the side of cylinder dust cover recess part insertion;The above technical solution, structure design is reasonable, simple structure, good waterproof performance, good dustproof effect, good sealing performance and practical good.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of brake system, in particular to a kind of anti-immersed self-adjusting gap brake wheel cylinder. BACKGROUND

[0002] In light truck market, brake is generally used hydraulic brake system, brake system is all used drum brake, and its brake sub-pump uses self-adjusting gap structure brake wheel cylinder, and the piston of brake wheel cylinder moves outward, and it will make brake wheel cylinder dust cover be stretched and deformed.

[0003] Now the brake wheel cylinder in market due to dust cover and cylinder and piston end sealing in stretched state can change sealing state, when vehicle passes through muddy road, water can enter cylinder from dust cover and cylinder. After long time, due to cylinder and piston are all iron-based materials, rust is generated, leading to oil leakage.

[0004] The existing brake wheel cylinder refers to Figure 1 The existing dust cover refers to Figure 2 , Figure 1 1 is piston, 2 is dust cover, 3 is cylinder, 4 is leather cup, the dust cover of existing brake wheel cylinder is unreasonably designed: the working state stretching performance of dust cover and the waterproof performance after stretching are not considered, and the cooperation of dust cover and cylinder and piston is unreasonable, although part of dust cover in market has been improved, but stretching and cooperation size have not been greatly improved. The radial dimension of dust cover is 4mm smaller than piston or cylinder, the interference amount of dust cover is 4mm, the axial dimension of piston dust cover groove or cylinder dust cover groove is 0.2mm wider than dust cover, after brake pad wears, the movement distance of piston becomes long, the width of dust cover has no stretching allowance, leading to that sealing with piston and cylinder is not firm, when vehicle passes through water area, water enters from sealing, leading to that product is rusted, product leaks or is stuck, and product fails. SUMMARY

[0005] In view of the deficiencies of prior art, the purpose of the present application is to provide a kind of anti-immersed self-adjusting gap brake wheel cylinder, which has reasonable structure design, simple structure, good waterproof performance, good dustproof effect, good sealing performance and good practicability.

[0006] To achieve the above object, the present application provides the following technical scheme: A kind of anti-immersion self-adjusting gap brake wheel cylinder, including piston, dust cover, cylinder and leather bowl, the leather bowl is sleeved on piston, piston one end and leather bowl embeddedly arranged in cylinder, the exposed cylinder end of piston is provided with piston dust cover recess, cylinder is provided with cylinder dust cover recess, first piston sealing ring is integrally arranged in the position close to piston of dust cover, first tower type bending part is integrally arranged in the position close to first piston sealing ring of dust cover, first piston sealing ring is arranged in piston dust cover recess, and first piston sealing ring is inserted into one side of piston dust cover recess part and integrally provided with first waterproof boss rib;

[0007] Second piston sealing ring is integrally arranged in the position close to cylinder of dust cover, second tower type bending part is integrally arranged in the position close to second piston sealing ring of dust cover, second piston sealing ring is arranged in cylinder dust cover recess, and second piston sealing ring is inserted into one side of cylinder dust cover recess part and integrally provided with second waterproof boss rib.

[0008] The present application is further provided as: the opening direction of the first tower type bending part and the second tower type bending part is opposite.

[0009] The present application is further provided as: the top of the first tower type bending part and the second tower type bending part is oppositely arranged.

[0010] The present application is further provided as: the thickness of the first waterproof boss rib and the second waterproof boss rib is 0.25mm.

[0011] The present application is further provided as: the sum of the thickness of the first waterproof boss rib and the first piston sealing ring is greater than the width of the piston dust cover recess by 0.1mm.

[0012] The present application is further provided as: the sum of the thickness of the second waterproof boss rib and the second piston sealing ring is greater than the width of the cylinder dust cover recess by 0.1mm.

[0013] The present application has the advantages that: the structure of the present application is reasonable, the first tower type bending part and the second tower type bending part of the dust cover can greatly increase the stretching length during work, and only the bending parts at both sides are stretched, without affecting the sealing effect of the two sealing rings with the cylinder and the piston, two waterproof boss ribs are designed on the plane, the thickness of the waterproof boss rib is 0.25mm, the thickness of the waterproof boss rib plus the thickness of the aligned sealing ring is greater than the width of the cylinder dust cover recess or the piston dust cover recess by 0.1mm, which ensures good assembly of the product and plays a waterproof and dustproof role.

[0014] When the existing brake friction plate wears, the brake wheel cylinder stroke becomes larger, and the piston moves out of the dust cover. Because the two ends are designed with a pagoda-shaped bending part, stretching will not affect the sealing of the dust cover and the piston and the cylinder body. Only the pagoda-shaped bending part is stretched at the bending part. It is simple in structure, good in waterproof performance, good in dustproof effect, good in sealing performance and practical.

[0015] The application will be further described below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural schematic diagram of the prior art;

[0017] Figure 2 is a structural schematic diagram of the dust cover of the prior art;

[0018] Figure 3 is a structural schematic diagram of the embodiment of the application;

[0019] Figure 4 is a structural schematic diagram of the dust cover of the embodiment of the application;

[0020] Figure 5 is Figure 4 is an enlarged schematic diagram of the I part;

[0021] Figure 6 is Figure 4 is an enlarged schematic diagram of the I part. DETAILED DESCRIPTION

[0022] In the description of the present embodiment, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "front", "back" and the like appear, the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, if the terms "first", "second", "third" appear, they are only for description purposes and cannot be understood as indicating or implying relative importance.

[0023] Referring to Figures 3 to 6The application discloses a self-adjusting gap brake wheel cylinder capable of preventing water immersion, which comprises a piston 1, a dust cover 2, a cylinder body 3 and a leather cup 4, wherein the leather cup 4 is sleeved on the piston 1, one end of the piston 1 and the leather cup 4 are embedded in the cylinder body 3, a piston dust cover groove 11 is arranged on an exposed end of the piston 1, a cylinder body dust cover groove 31 is arranged on the cylinder body 3, a first piston sealing ring 21 is integrally arranged on the dust cover 2 close to the piston, a first tower-shaped bending part 22 is integrally arranged on the dust cover 2 close to the first piston sealing ring, the first piston sealing ring 21 is arranged in the piston dust cover groove 11, and a first waterproof convex rib 211 is integrally arranged on one side of the piston dust cover groove part into which the first piston sealing ring 21 is inserted.

[0024] A second piston sealing ring 23 is integrally arranged on the dust cover 2 close to the cylinder body, a second tower-shaped bending part 24 is integrally arranged on the dust cover 2 close to the second piston sealing ring, the second piston sealing ring 23 is arranged in the cylinder body dust cover groove 31, and a second waterproof convex rib 231 is integrally arranged on one side of the cylinder body dust cover groove part into which the second piston sealing ring 23 is inserted.

[0025] Preferably, the first tower-shaped bending part 22 and the second tower-shaped bending part 24 are oppositely arranged.

[0026] The top parts of the first tower-shaped bending part 22 and the second tower-shaped bending part 24 are oppositely arranged.

[0027] The first tower-shaped bending part 22 is bent to have an opening direction to the left and a top part to the right, which is similar to a tower structure with a head part to the right; the second tower-shaped bending part 24 is bent to have an opening direction to the right and a top part to the left, which is similar to a tower structure with a head part to the left.

[0028] The thicknesses of the first waterproof convex rib 211 and the second waterproof convex rib 231 are both 0.25 mm.

[0029] The sum of the thicknesses of the first waterproof convex rib 211 and the first piston sealing ring 21 is greater than the width of the piston dust cover groove 11 by 0.1 mm.

[0030] The sum of the thicknesses of the second waterproof convex rib 231 and the second piston sealing ring 23 is greater than the width of the cylinder body dust cover groove 31 by 0.1 mm.

[0031] In actual application, the first and second pagoda-shaped bending parts of the dust cover can greatly increase the stretching length during work, and stretching will only occur at the two pagoda-shaped bending parts, without affecting the sealing effect of the two sealing rings of the cylinder and the piston, and two waterproof ribs are designed on the plane, the thickness of the waterproof rib is 0.25 mm, and the thickness of the waterproof rib plus the thickness of the aligned sealing ring is 0.1 mm larger than the width of the groove of the cylinder dust cover or the groove of the piston dust cover, so that the product can be assembled well, and the waterproof and dustproof effects are achieved.

[0032] When the existing brake friction plate is worn, the brake cylinder stroke becomes larger, and the piston moves out of the dust cover. Because the two ends are designed with pagoda-shaped bending parts, stretching will not affect the sealing of the dust cover and the piston and the cylinder, and stretching will only occur at the pagoda-shaped bending part, which is simple in structure, good in waterproof performance, good in dustproof effect, good in sealing performance and good in practicality.

[0033] The above embodiments are only used for further description of the application, and cannot be understood as limitation of the protection scope of the application. The skilled in the art can make some non-essential improvements and adjustments to the application according to the above content, which falls within the protection scope of the application.

Claims

1. A water-resistant self-adjusting clearance brake wheel cylinder, comprising a piston (1), a dust cover (2), a cylinder body (3), and a piston cup (4), wherein the piston cup (4) is sleeved on the piston (1), one end of the piston (1) and the piston cup (4) are embedded in the cylinder body (3), a piston dust cover groove (11) is provided on the end of the piston (1) protruding from the cylinder body, and a cylinder body dust cover groove (31) is provided on the cylinder body (3), characterized in that: The dust cover (2) is integrally provided with a first piston sealing ring (21) near the piston position, the dust cover (2) is integrally provided with a first tower type bending part (22) near the first piston sealing ring position, the first piston sealing ring (21) is arranged in the piston dust cover groove (11), and the first piston sealing ring (21) is integrally provided with a first waterproof convex rib (211) on one side of the piston dust cover groove part; The dust cover (2) is integrally provided with a second piston sealing ring (23) near the cylinder position, the dust cover (2) is integrally provided with a second tower type bending part (24) near the second piston sealing ring position, the second piston sealing ring (23) is arranged in the cylinder dust cover groove (31), and the second piston sealing ring (23) is integrally provided with a second waterproof convex rib (231) on one side of the cylinder dust cover groove part; The opening directions of the first tower type bending part (22) and the second tower type bending part (24) are opposite; and the top parts of the first tower type bending part (22) and the second tower type bending part (24) are oppositely arranged.

2. A submersible self-adjusting slack adjuster wheel cylinder as defined in claim 1, wherein: The thicknesses of the first waterproof convex rib (211) and the second waterproof convex rib (231) are both 0.25mm.

3. An immersion-proof self-adjusting gap brake wheel cylinder according to claim 2, characterized in that: The sum of the thicknesses of the first waterproof convex rib (211) and the first piston sealing ring (21) is greater than the width of the piston dust cover groove (11) by 0.1mm.

4. An immersion-proof self-adjusting gap brake wheel cylinder according to claim 3, characterized in that: The sum of the thicknesses of the second waterproof convex rib (231) and the second piston sealing ring (23) is greater than the width of the cylinder dust cover groove (31) by 0.1mm.

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