Piston dust cover of special vehicle brake caliper

Abstract

The utility model discloses a piston dust cover of a special vehicle brake caliper, and relates to the technical field of special vehicle braking. The dustproof cover comprises a dustproof cover body, the dust cover body is composed of a first clamping part, a folding and stretching part and a second clamping part. A first groove is coaxially formed in the inner wall of a piston hole channel of the brake caliper shell. A guide-out ring groove correspondingly communicated with the first groove is formed in the end part of the piston hole channel; a second groove is coaxially formed in the outer wall of the piston body; the first clamping part is sleeved in the first groove in an interference manner; the second clamping part is sleeved in the second groove in an interference manner; the folding and stretching part penetrates through the guide-out ring groove to connect the first clamping part with the second clamping part; annular supporting frameworks are wrapped in the first clamping part and the second clamping part; a heat dissipation cavity is formed in the supporting framework. The beneficial effects of the utility model are that: it has better high temperature resistance, the support stability after installation is stronger, and the life is longer.

Description

TECHNICAL FIELD

[0001] The utility model relates to special vehicle brake technology field especially relates to a piston dust cover of special vehicle brake caliper. BACKGROUND

[0002] In the brake system of the automobile, generally by the oil liquid in the brake caliper piston and then push the friction piece, by the friction piece friction realizes the brake. Because the piston and brake caliper will occur relative motion, in the process of automobile driving, part of the accumulated water or dust will enter the oil liquid from the gap between both, not only can cause oil pollution, but also can lead to piston jam and cannot work normally, causes brake failure, brings the security hidden danger, so need to install dust cover between the piston of automobile and brake caliper and play the protection function.

[0003] The current brake caliper piston dust cover usually only adopts integral type rubber ring structure, and the high-temperature resistance is poor, and the brake caliper can be expanded and contracted for a long time, which can cause irreversible deformation of the piston dust cover, affect the dustproof sealing effect, especially when applied to various heavy special vehicles, the service life of the traditional piston dust cover is greatly reduced, and the structure of only adopting the integral type rubber ring can cause the whole to lack stable support, and the deformation or even falling probability is further increased. UTILITY MODEL CONTENTS

[0004] The utility model solves the technical problem existing in the above, provides a piston dust cover of special vehicle brake caliper, which has better high-temperature resistance, stronger support stability after installation and higher service life.

[0005] The utility model adopts the technical scheme: provide a piston dust cover of special vehicle brake caliper, including dust cover body;The dust cover body is composed of first clamping portion, folding and stretching portion and second clamping portion;The inner wall of the piston hole of the brake caliper shell is coaxially provided with a first groove;The end of the piston hole is provided with a lead-out ring groove in communication with the first groove;The outer wall of the piston body is coaxially provided with a second groove;The first clamping portion is interference-fitted in the first groove;The second clamping portion is interference-fitted in the second groove;The folding and stretching portion passes through the lead-out ring groove and connects the first clamping portion and the second clamping portion;The first clamping portion and the second clamping portion are wrapped with annular support skeletons;The support skeleton is internally provided with a heat dissipation cavity;The heat dissipation cavity is filled with cooling liquid;A plurality of heat dissipation caps are integrally connected to one end of the support skeleton;One end of the heat dissipation cap is in communication with the heat dissipation cavity, and the other end is exposed outside the dust cover body.

[0006] Further optimize the technical scheme, the support skeleton of the piston dust cover of the special vehicle brake caliper is composed of two half-ring split skeletons;Two corresponding split skeletons are separately arranged.

[0007] Further optimize the technical scheme, a special car brake caliper piston dust cover split skeleton inside the heat dissipation cavity along the corresponding fixed with the wave-shaped partition bar.

[0008] Further optimize the technical scheme, a special car brake caliper piston dust cover split skeleton, partition bar and heat dissipation cap are made of aluminum alloy material.

[0009] The utility model discloses beneficial effect lies in:

[0010] Through the first clamping portion interference sleeve connection in the first recess, the second clamping portion interference sleeve connection in the second recess, realize the installation fixed of dust cover body, realize the sealed shielding between piston body and piston hole gap again, and the folding stretchable portion can adapt the sliding action of piston in the piston hole through compression and extension.

[0011] The first clamping portion and the second clamping portion are wrapped with annular support skeletons, and the stability of the first clamping portion and the second clamping portion after installation can be improved through the support skeletons. The support skeletons are internally filled with cooling liquid, and the heat conducted to the dust cover body can be absorbed through the heat absorption and cooling effect of the cooling liquid, the dust cover body is effectively cooled, the high-temperature resistance of the dust cover body is improved, and the service life is effectively improved. The one end of the support skeleton is integrally connected with a plurality of heat dissipation caps, one end of the heat dissipation cap is communicated with the heat dissipation cavity, and the other end is exposed to the outside of the dust cover. DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model;

[0013] Figure 2 It is Figure 1 It is a local enlarged view of structure in A place.

[0014] Figure 3 It is a plane structure schematic diagram in the split skeleton.

[0015] In the drawing, 1, first clamping portion, 2, folding stretchable portion, 3, second clamping portion, 4, brake caliper shell, 5, piston hole, 6, first recess, 7, lead-out annular groove, 8, piston body, 9, second recess, 10, support skeleton, 11, heat dissipation cavity, 12, heat dissipation cap, 13, split skeleton, 14, partition bar. DETAILED DESCRIPTION

[0016] The utility model will be further explained in detail in combination with the drawings and specific embodiments.

[0017] For example, Figures 1-2As shown, a piston dust cover of a special vehicle brake caliper comprises a dust cover body; the dust cover body is composed of a first clamping part 1, a folding extension part 2 and a second clamping part 3; a first groove 6 is coaxially opened in the inner wall of a piston channel 5 of a brake caliper shell 4; a guide ring groove 7 is opened at the end of the piston channel 5 and communicates with the first groove 6; a second groove 9 is coaxially opened in the outer wall of a piston body 8; the first clamping part 1 is interference-fitted in the first groove 6; the second clamping part 3 is interference-fitted in the second groove 9; the folding extension part 2 connects the first clamping part 1 and the second clamping part 3 through the guide ring groove 7; the first clamping part 1 and the second clamping part 3 are both wrapped with annular support skeletons 10; the support skeletons 10 are internally provided with heat dissipation cavities 11; the heat dissipation cavities 11 are filled with cooling liquid; a plurality of heat dissipation caps 12 are integrally connected to one end of the support skeletons 10; one end of the heat dissipation cap 12 communicates with the heat dissipation cavity 11, and the other end is exposed outside the dust cover body.

[0018] In terms of installation, the first clamping part 1 is outwardly interference-fitted with the first groove 6, and the second clamping part 3 is inwardly interference-fitted with the second groove 9, which ensures the sealing and shielding of the gap between the piston channel 5 and the piston body 8, and effectively prevents foreign matters such as accumulated water and dust from entering.

[0019] In addition, the installation of the first clamping part 1 and the second clamping part 3 is more firm through the support of the support skeletons 10, which makes it not easy to deform and not easy to come off the installation position. For many special vehicles with harsh working environment and long-term driving on bumpy and uneven road surfaces, this technical effect is particularly important.

[0020] When the brake is in action, the friction heat generated by the abutment of the piston body 8 against the brake pad will be conducted to the dust cover body. If the dust cover body deforms due to its poor high-temperature resistance, it may lead to loose shielding of the gap between the piston channel 5 and the piston body 8, and then foreign matters may enter, causing safety hazards. Therefore, in this technical solution, the cooling liquid filled in the heat dissipation cavity 11 of the support skeleton 10 can effectively absorb the conducted heat, achieving the effect of cooling the dust cover body and keeping it within a relatively safe temperature range. Moreover, the heat absorbed by the cooling liquid can be efficiently discharged through the heat dissipation cap 12 exposed outside after the brake action is completed, so that the cooling liquid can achieve sufficient heat dissipation effect again when the brake is in action again, ensuring long-term and reliable heat dissipation performance.

[0021] This technical solution increases the durability of the dust cover body by increasing the support firmness and controlling the temperature of the dust cover body, thereby ensuring that it has sufficient service life when applied to various special vehicles.

[0022] As Figure 3As shown, the support framework 10 is composed of two half-ring split framework 13; two corresponding split framework 13 is separated between the settings.

[0023] In order to meet the dust cover body maintenance needs, through the split framework 13 between the split settings, facilitate the dust cover body set installation.

[0024] As shown in the drawings, Figure 3 As shown, the split framework 13 inside the heat dissipation cavity 11 along the trend corresponding fixed with wave-shaped partition strip 14. Wave-shaped partition strip 14, on the one hand, increases the heat dissipation cavity 11 inside the contact area with the cooling liquid, on the other hand, it can make the cooling liquid and the collision intensified, improve the heat conduction efficiency.

[0025] Split framework 13, partition strip 14 and heat dissipation cap 12 are made of aluminum alloy material. Aluminum alloy material, on the one hand, to ensure the heat conduction efficiency, on the other hand, its light and strong, ensure long-term durability.

[0026] It can be understood that the utility model is described through some embodiments, the person skilled in the art knows that can make various changes or equivalent replacement to these features and embodiments without departing from the spirit and scope of the utility model. In addition, under the guidance of the utility model, these features and embodiments can be modified to adapt to specific conditions and materials without departing from the spirit and scope of the utility model. Therefore, the utility model is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application belong to the scope of the utility model.

Claims

1. A piston dust cover for a special vehicle brake caliper, characterized in that: Includes a dust cover body; the dust cover body is composed of a first snap-fit ​​part (1), a folding extension part (2), and a second snap-fit ​​part (3); the inner wall of the piston channel (5) of the brake caliper housing (4) has a first groove (6) coaxially formed; the end of the piston channel (5) has a guide ring groove (7) corresponding to and communicating with the first groove (6); the outer wall of the piston body (8) has a second groove (9) coaxially formed; the first snap-fit ​​part (1) is interference-fitted into the first groove (6); the second snap-fit ​​part (3) is interference-fitted into the second groove (9). The folded extension part (2) passes through the outlet ring groove (7) to connect the first snap-fit ​​part (1) and the second snap-fit ​​part (3); the first snap-fit ​​part (1) and the second snap-fit ​​part (3) are both wrapped with annular support frame (10); the support frame (10) is filled with a heat dissipation cavity (11); the heat dissipation cavity (11) is filled with coolant; a number of heat dissipation caps (12) are integrally connected to one end of the support frame (10); one end of the heat dissipation cap (12) is connected to the heat dissipation cavity (11), and the other end is exposed outside the dust cover body.

2. The piston dust cover for a special vehicle brake caliper according to claim 1, characterized in that: The supporting frame (10) consists of two semi-circular split frames (13); the two corresponding split frames (13) are set separately.

3. The piston dust cover for a special vehicle brake caliper according to claim 2, characterized in that: The heat dissipation cavity (11) inside the split frame (13) is fixed with a wave-shaped partition strip (14) along the direction.

4. The piston dust cover for a special vehicle brake caliper according to claim 3, characterized in that: The split frame (13), partition strip (14) and heat sink (12) are all made of aluminum alloy.

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