Sealing structure of caliper disc brake of loading machine drive axle

Abstract

The utility model discloses a sealing structure of a caliper disc brake of a loader drive axle, which is characterized in that a star-shaped sealing ring is used for sealing, the star-shaped sealing ring is provided with four lips, a support ring is used for supporting the star-shaped sealing ring, and the support ring and the star-shaped sealing ring are tightly attached and assembled on sealing grooves of an outer caliper body and an inner caliper body together; the dustproof cover is assembled on the dustproof grooves of the outer clamp body and the inner clamp body for dust prevention; the piston is arranged in the piston holes of the outer clamp body and the inner clamp body; the O-shaped ring is placed on the groove of the outer clamp body so that the inner clamp body can be assembled on the outer clamp body, and the outer clamp body and the inner clamp body are locked through the bolt and the gasket. The brake pad is placed between the outer caliper body and the inner caliper body and fixed through the plug pin, and then the cotter pin penetrates into the plug pin. The sealing structure solves the problem that after an existing sealing structure is used for a long time, due to the fact that a rectangular sealing ring is prone to distortion and deformation and the rectangular sealing ring is only provided with one lip, oil leakage is prone to occurring.

Description

Technical Field

[0001] The utility model relates to the technical field of loader drive axle brakes, in particular to a loader drive axle caliper disc brake sealing structure. Background Art

[0002] Existing seals for loader drive axle caliper disc brakes typically utilize a rectangular sealing ring that fits tightly against the piston during operation, preventing brake fluid leakage and achieving a sealing effect. This sealing structure has several drawbacks: First, the sealing groove only houses the rectangular sealing ring. This can easily distort and deform during the repetitive up-and-down movement of the piston, leading to oil leakage. Second, the rectangular sealing ring has only a single lip, resulting in poor sealing effectiveness and prone to oil leakage after prolonged use. Summary of the Invention

[0003] The utility model aims to provide a sealing structure for a loader drive axle caliper disc brake which has a simple structure, low manufacturing and maintenance costs, good sealing effect and a long product service life, and solves the problem that the existing sealing structure is prone to oil leakage due to its rectangular sealing ring being easily twisted and deformed after long-term use and the rectangular sealing ring having only one lip.

[0004] In order to achieve the above purpose, the utility model of the loader drive axle caliper disc brake sealing structure includes an outer caliper body 1, an inner caliper body 2, a bolt 3, a washer 4, a cotter pin 5, a latch pin 6, a piston 7, a support ring 8, a star-shaped sealing ring 9, a dust cover 10, an O-ring 11 and a brake pad 12; the star-shaped sealing ring 9 is used for sealing, and the star-shaped sealing ring 9 is provided with four lips, and the support ring 8 is used to support the star-shaped sealing ring 9, and the support ring 8 and the star-shaped sealing ring 9 are tightly attached and assembled together on the outer caliper body 1 and the inner On the sealing groove of the caliper body 2; the dust cover 10 is assembled on the dustproof grooves of the outer caliper body 1 and the inner caliper body 2 for dust prevention; the piston 7 is inserted into the piston holes of the outer caliper body 1 and the inner caliper body 2; the O-ring 11 is placed on the groove of the outer caliper body 1 to assemble the inner caliper body 2 on the outer caliper body 1, and the outer caliper body 1 and the inner caliper body 2 are locked by the bolt 3 and the washer 4; the brake pad 12 is placed in the middle of the outer caliper body 1 and the inner caliper body 2 and fixed by the pin 6, and then the cotter pin 5 is inserted into the pin 6.

[0005] The sealing structure of the loader drive axle caliper disc brake is achieved by replacing the rectangular sealing ring in the prior art with a star-shaped sealing ring 9 and adding a support ring 8 above the star-shaped sealing ring 9. The sealing structure has the following technical features and beneficial effects:

[0006] 1. The star-shaped sealing ring 9 is provided with four lips. The lips of the star-shaped sealing ring 9 are in close contact with the piston 7, which can greatly enhance the sealing effect and reduce the risk of oil leakage;

[0007] 2. A support ring 8 is added to the star-shaped sealing ring 9. The support ring 8 supports the star-shaped sealing ring 9 to prevent it from deforming, which can effectively prevent the sealing ring from twisting and deforming and causing oil leakage;

[0008] 3. The sealing structure is simple and compact, the operation is safe and reliable, and the service life is long. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 The utility model is a main cross-sectional schematic diagram of the sealing structure of the caliper disc brake of the loader drive axle.

[0010] Figure 2 yes Figure 1 Schematic diagram of the partially enlarged structure.

[0011] Figure numerals: outer caliper body 1, inner caliper body 2, bolt 3, washer 4, cotter pin 5, latch pin 6, piston 7, support ring 8, star-shaped sealing ring 9, dust cover 10, O-ring 11, brake pad 12. DETAILED DESCRIPTION

[0012] The specific embodiment of the sealing structure of the caliper disc brake of the loader drive axle of the present invention will be further described in detail below with reference to the accompanying drawings.

[0013] Figure 1-Figure 2 As shown, the sealing structure of the loader drive axle caliper disc brake of the utility model includes an outer caliper body 1, an inner caliper body 2, a bolt 3, a washer 4, a cotter pin 5, a latch pin 6, a piston 7, a support ring 8, a star-shaped sealing ring 9, a dust cover 10, an O-ring 11 and a brake pad 12; the star-shaped sealing ring 9 is used for sealing and has four lips. The support ring 8 is used to support the star-shaped sealing ring 9. The support ring 8 and the star-shaped sealing ring 9 are tightly attached and assembled together on the outer caliper body 1 and the inner caliper body 2. on the sealing groove; the dust cover 10 is assembled on the dustproof grooves of the outer caliper body 1 and the inner caliper body 2 for dust prevention; the piston 7 is installed in the piston holes of the outer caliper body 1 and the inner caliper body 2; the O-ring 11 is placed on the groove of the outer caliper body 1 to assemble the inner caliper body 2 on the outer caliper body 1, and the outer caliper body 1 and the inner caliper body 2 are locked by the bolt 3 and the washer 4; the brake pad 12 is placed in the middle of the outer caliper body 1 and the inner caliper body 2 and fixed by the pin 6, and then the cotter pin 5 is inserted into the pin 6.

[0014] During operation, the brake oil enters the two caliper bodies from the oil inlet hole of the inner caliper body 2 and pushes up the piston 7 to support the brake pad 12; the lip of the star-shaped sealing ring 9 is in close contact with the piston 7 to achieve a sealing effect, and the support ring 8 supports the star-shaped sealing ring 9 to prevent it from deformation.

[0015] The above-mentioned loader drive axle caliper disc brake sealing structure adopts a structure of a star-shaped sealing ring 9 and a support ring 8. While solving the problem in the prior art that the rectangular sealing ring of the sealing structure has only one lip and has a poor sealing effect, it also solves the problem in the prior art that the sealing groove is only equipped with a rectangular sealing ring, and when the piston moves up and down repeatedly, the rectangular sealing ring is easily twisted and deformed, resulting in oil leakage after long-term use, thereby greatly improving the service life of the brake.

Claims

1. A loader drive axle caliper disc brake sealing structure, comprising an outer caliper body (1), an inner caliper body (2), a bolt (3), a washer (4), a cotter pin (5), a latch pin (6), a piston (7), a dust cover (10), an O-ring (11) and a brake pad (12); the dust cover (10) is assembled on the dustproof grooves of the outer caliper body (1) and the inner caliper body (2) for dust prevention; the piston (7) is installed in the outer caliper body (1) and the inner caliper body ( 2); the O-ring (11) is placed on the groove of the outer caliper body (1) to assemble the inner caliper body (2) on the outer caliper body (1), and the outer caliper body (1) and the inner caliper body (2) are locked by bolts (3) and washers (4); the brake pad (12) is placed between the outer caliper body (1) and the inner caliper body (2) and fixed by a latch (6), and then a split pin (5) is inserted into the latch (6); its characteristics are: It also includes a support ring (8) and a star-shaped sealing ring (9); the star-shaped sealing ring (9) is used for sealing and is provided with four lips; the support ring (8) is used to support the star-shaped sealing ring (9); the support ring (8) and the star-shaped sealing ring (9) are tightly attached and assembled together on the sealing grooves of the outer caliper body (1) and the inner caliper body (2).

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