Air pressure disc brake

Abstract

The utility model relates to the technical field of brakes, and discloses an air pressure disc brake which comprises a caliper body, a piston block capable of moving is arranged in the caliper body, a brake pad is arranged on the caliper body, a sealing ring is arranged on the caliper body, the piston block is located on the inner side of the sealing ring, and a protection piece is arranged on the caliper body. The protection part comprises a dustproof assembly used for intercepting particles, and the dustproof assembly is arranged between the piston block and the sealing ring and used for intercepting the particles attached to the surface of the piston block when the piston block resets and moves and preventing the particles from making contact with the sealing ring. Particles are prevented from making contact with the sealing ring, the grinding effect is reduced, the service life of the sealing ring is prolonged, and the brake reliability is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to brake technology field especially relates to a pneumatic disc brake. BACKGROUND

[0002] Pneumatic disc brake with its response fast, brake efficiency high advantage, is widely used in modern vehicles, engineering machinery etc.

[0003] In order to reduce the friction loss when the piston block moves, guarantee its smooth operation, usually smears grease on the surface of piston block and lubricates, however, this lubrication measure has brought new problems: grease has viscosity, in the process of piston block extension, the particulate matter such as dust, sand in external environment is extremely easy to adhere to the surface of piston block coated with grease, when the piston block resets, these adhered particles will move along with it, in the prior art, the sealing ring as the key sealing component for preventing gas leakage, maintaining the stability of gas pressure system, directly contacts and cooperates with the piston block, the existence of particles makes the piston block and the sealing ring form "grinding effect", accelerates the wear of sealing ring, for a long time, the sealing performance of sealing ring will be greatly reduced, appears gas leakage, brake response delay etc. SUMMARY

[0004] The utility model discloses to the deficiency in the prior art, provide a kind of pneumatic disc brake, by being provided with protective element on caliper body, effectively intercepts the particle adhered to the surface when piston block resets, avoids particle and sealing ring contact, improves the reliability and service life of brake.

[0005] To achieve the above object, the utility model adopts the following technical scheme:

[0006] A kind of pneumatic disc brake, including caliper body, the piston block capable of moving is equipped in the caliper body, brake pad is equipped on the caliper body, sealing ring is equipped on the caliper body, the piston block is inside the sealing ring, protective element is equipped on the caliper body, the protective element includes dustproof assembly for intercepting particle, the dustproof assembly is between piston block and sealing ring, to intercept the particle adhered to the surface when piston block resets, avoid particle and sealing ring contact.

[0007] Preferably, the protective piece comprises a connecting plate and a placing shell, the placing shell is provided with a placing groove, the dustproof assembly is in the placing groove, the placing shell is connected with the connecting plate, and the connecting plate extrudes and fixes the dustproof assembly in the placing groove.

[0008] Preferably, the dustproof assembly comprises a dustproof gasket, the dustproof gasket is arranged in the placing groove, and the dustproof gasket is further provided with a dust blocking gasket for blocking particles.

[0009] Preferably, a plurality of gap grooves are equidistantly arranged on the inner side of the dust blocking gasket, so that the dust blocking gasket can be deformed when the piston block is pushed out, the gap grooves can ensure that the dust blocking gasket does not hinder the movement of the piston block when the piston block normally extends to perform a braking action, and the smooth realization of the braking function is ensured.

[0010] Preferably, the dustproof assembly further comprises a scraping gasket, and the inner side of the scraping gasket is provided with a scraping end in contact with the outer surface of the piston block.

[0011] Preferably, the scraping end is in an elastic lip structure, the elastic lip can closely adhere to the surface of the piston block, the efficiency and effect of scraping particles are improved, and the elastic lip can adapt to the slight displacement of the piston block, so that long-term stable scraping performance is ensured.

[0012] Preferably, the plier body is provided with a mounting groove, the connecting plate and the placing shell are detachably connected, the placing shell is provided with a mounting end block, the placing shell is in the mounting groove, and the mounting end block is connected with the plier body through bolts, so that the protective piece is mounted on the plier body.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] The utility model discloses a dustproof assembly and protection piece are set up on the body of tongs, effectively intercept the particle that piston block reset surface adheres, avoid particle and sealing ring contact, reduce " grinding effect ", prolong the service life of sealing ring, promote the reliability of brake, and the connecting plate of protection piece and the dustproof assembly of placing shell extrusion fixed are fixed, ensure its firm installation, the clearance groove design of dust pad ring, when piston block pushes out, is not hindered, guarantee the smooth braking function, the elastic lip mouth of the pad ring of scraping, can closely adhere piston block surface, high -efficiently scrape particle and adapt to tiny displacement, in addition, the protection piece detachable connection, convenient dustproof assembly's replacement and cleaning, reduce maintenance cost. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the following will be to the drawing needed in the embodiment used briefly introduce, obviously, the drawing in the following description only some embodiments of the utility model, for the ordinary skilled person in the art, under the premise of not paying creative labor, still can obtain other drawings according to these drawings.

[0016] Figure 1 It is the overall structure schematic view of the utility model;

[0017] Figure 2 It is the brake pad position view of the utility model;

[0018] Figure 3 It is the piston block and protection piece position view of the utility model;

[0019] Figure 4 It is the installation slot position view of the utility model;

[0020] Figure 5 It is the part body section view of the utility model;

[0021] Figure 6 It is the dustproof assembly of the utility model; Figure 5 The enlarged view in A of middle;

[0022] Figure 7 It is the protection piece structure section view of the utility model;

[0023] Figure 8 It is the dustproof assembly of the utility model; Figure 7 The enlarged view in B of middle;

[0024] Figure 9 It is the protection piece structure explosion view of the utility model;

[0025] Figure 10 It is the placing shell structure view of the utility model;

[0026] Figure 11The dust blocking gasket structure view of the utility model.

[0027] Figure number explanation: 1, clamp body;11, mounting groove;2, brake pad;3, piston block;4, protection piece;41, connecting plate;42, placing shell;421, placing groove;422, mounting end block;43, dustproof gasket;44, dust blocking gasket;441, gap groove;45, scraping gasket;451, scraping end;5, sealing ring. DETAILED DESCRIPTION

[0028] The utility model is further described in detail below in combination with the drawings.

[0029] The following description is used to disclose the utility model so that those skilled in the art can implement the utility model. The preferred embodiments in the following description are only as examples, and other obvious modifications can be thought of by those skilled in the art. The basic principles defined in the following description can be used in other implementation, modification, improvement, equivalent and other technical solutions without departing from the spirit and scope of the utility model.

[0030] Those skilled in the art should understand that in the disclosure of the utility model, the orientation or position indicated by the terms "longitudinal", "transverse", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientation or position relationship shown in the drawings, which is only for the simplified description of the utility model for the convenience of description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore the above-mentioned terms cannot be understood as a limitation of the utility model.

[0031] It can be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of one element can be one, and in another embodiment, the number of the element can be multiple, and the term "one" cannot be understood as a limitation on the number. EMBODIMENT

[0032] Please refer to Figures 1-11 A pneumatic disc brake, comprising a clamp body 1, the clamp body 1 is provided with a movable piston block 3, the clamp body 1 is provided with a brake pad 2, the clamp body 1 is provided with a sealing ring 5, the piston block 3 is inside the sealing ring 5, the clamp body 1 is provided with a protection piece 4, the protection piece 4 comprises a dustproof assembly for intercepting particles, the dustproof assembly is between the piston block 3 and the sealing ring 5, to intercept the particles adhered to the surface of the piston block 3 when resetting and moving, to avoid the particles from contacting the sealing ring 5, how the brake pad 2 is arranged in the clamp body 1 is the existing disclosed technology, and how the brake pad 2 is installed and arranged will not be described in detail here.

[0033] The protection piece 4 comprises a connecting plate 41 and a placing shell 42, the placing shell 42 is provided with a placing groove 421 in which the dustproof assembly is located, the placing shell 42 is connected with the connecting plate 41, the connecting plate 41 extrudes and fixes the dustproof assembly in the placing groove 421, and the dustproof assembly in the installation groove 11 is extruded and fixed through the connecting plate 41, so that the dustproof assembly can be stably installed in the placing shell 42.

[0034] The dustproof assembly comprises a dustproof gasket 43, the dustproof gasket 43 is arranged in the placing groove 421, and a dust blocking gasket 44 for blocking particles is further arranged on the dustproof gasket 43, the dust blocking gasket 44 can block the step of the piston block 3, so that the particles are prevented from being accumulated at the step, and the dust blocking gasket 44 can also preliminarily block the particles, thereby reducing the possibility of the particles moving towards the sealing ring 5.

[0035] A plurality of gap grooves 441 are equidistantly arranged on the inner side of the dust blocking gasket 44, so that the dust blocking gasket 44 can be deformed when the piston block 3 is pushed out, the gap grooves 441 can ensure that the dust blocking gasket 44 does not hinder the movement of the piston block 3 when the piston block 3 normally extends to perform the braking action, and the smooth realization of the braking function is ensured.

[0036] The dustproof assembly further comprises a scraping gasket 45, an scraping end 451 in contact with the outer surface of the piston block 3 is arranged on the inner side of the scraping gasket 45, the scraping end 451 can actively scrape the particles adhered to the surface of the piston block 3, thereby further reducing the risk of the particles contacting the sealing ring 5.

[0037] The scraping end 451 is in the form of an elastic lip, the elastic lip can closely contact the surface of the piston block 3, thereby improving the efficiency and effect of scraping the particles, and at the same time, the elastic lip can adapt to the slight displacement of the piston block 3, thereby ensuring the long-term stable scraping performance.

[0038] The plier body 1 is provided with an installation groove 11, the connecting plate 41 and the placing shell 42 are detachably connected, the placing shell 42 is provided with an installation end block 422, the placing shell 42 is arranged in the installation groove 11, and the installation end block 422 is connected with the plier body 1 through bolts, so that the protection piece 4 is installed on the plier body 1, the connecting plate 41 and the placing shell 42 can be connected through thread cooperation, and the detachable connection between the connecting plate 41 and the placing shell 42 facilitates the replacement or cleaning of the dustproof assembly.

[0039] When the air pressure disc brake works, the air pressure pushes the piston block 3 to extend, at this time the gap groove 441 on the dustproof washer 44 deforms the dustproof washer 44, does not hinder the normal movement of the piston block 3, the piston block 3 pushes the brake pad 2 to contact the brake disc, realizes the braking, in the process of extending the piston block 3, the surface of the piston block 3 will adhere to the particles, when the braking ends, the piston block 3 resets, the dustproof washer 43 and the dustproof washer 44 first block the particles on the surface of the piston block 3, prevent the particles from further moving to the sealing ring 5, at the same time, the scraping end 451 (elastic lip structure) of the scraping washer 45 is tightly attached to the surface of the piston block 3, actively scrapes the particles adhered to the surface of the piston block 3, effectively intercepts the particles, avoids the particles from contacting the sealing ring 5, thereby protecting the sealing ring 5 from being worn by the particles;

[0040] When it is necessary to maintain or replace the protection piece 4, the placing shell 42 can be disassembled and taken out from the mounting groove 11 of the clamp body 1, then the connecting plate 41 can be separated from the placing shell 42, the dustproof washer 43, the dustproof washer 44 and the scraping washer 45 can be conveniently cleaned, repaired or replaced, after the maintenance is completed, the installation process is followed to reinstall.

[0041] The person skilled in the art should understand that the above description and the embodiments of the utility model shown in the drawings are only as examples and do not limit the utility model. The purpose of the utility model has been completely and effectively realized. The function and structural principle of the utility model have been displayed and explained in the embodiments, and the embodiments of the utility model can have any deformation or modification without departing from the principle.

Claims

1. A pneumatic disc brake, comprising a caliper body (1) in which a movable piston block (3) is arranged, a brake pad (2) arranged on the caliper body (1), a sealing ring (5) arranged on the caliper body (1), the piston block (3) being arranged inside the sealing ring (5), characterized in that The pincer body (1) is provided with a protection piece (4), the protection piece (4) comprises a dustproof assembly for intercepting particles, the dustproof assembly is between the piston block (3) and the sealing ring (5), and the dustproof assembly is used for intercepting particles adhered to the surface of the piston block (3) during reset movement, so that the particles are prevented from contacting the sealing ring (5).

2. A gas pressure disc brake according to claim 1, characterised in that: The protection piece (4) comprises a connecting plate (41) and a placing shell (42), the placing shell (42) is provided with a placing groove (421), the dustproof assembly is in the placing groove (421), the placing shell (42) is connected with the connecting plate (41), and the connecting plate (41) extrudes and fixes the dustproof assembly in the placing groove (421).

3. A gas pressure disc brake according to claim 2, wherein: The dustproof assembly comprises a dustproof gasket (43), the dustproof gasket (43) is arranged in the placing groove (421), and the dustproof gasket (43) is further provided with a dust-blocking gasket (44) for blocking particles.

4. A gas pressure disc brake according to claim 3, wherein: Inner sides of the dust-blocking gasket (44) are provided with a plurality of gap grooves (441) at equal intervals, so that the dust-blocking gasket (44) can be deformed when the piston block (3) is pushed out.

5. A gas pressure disc brake according to claim 4, wherein: The dustproof assembly further comprises a scraping gasket (45), and an inner side of the scraping gasket (45) is provided with a scraping end (451) in contact with an outer surface of the piston block (3).

6. A gas pressure disc brake according to claim 5, wherein: The scraping end (451) is in an elastic lip structure.

7. A gas pressure disc brake according to claim 6, wherein: The pincer body (1) is provided with a mounting groove (11), the connecting plate (41) and the placing shell (42) are detachably connected, the placing shell (42) is provided with a mounting end block (422), and the placing shell (42) is in the mounting groove (11).

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