Three-ton loader drive axle wheel edge oil seal structure

Abstract

The utility model discloses a wheel edge oil seal structure of a drive axle of a 3-ton loader. Inner rings of a large cone bearing and a small cone bearing are installed on a supporting shaft, and outer rings of the large cone bearing and the small cone bearing are installed on a hub; the O-shaped ring is assembled on the combined surface of the brake disc and the hub to play a sealing role; the dustproof cover covers the brake disc to prevent the oil seal from falling off and prevent outside sand from falling into the oil seal, an inner hole of the oil seal is matched with the outer circle of the supporting shaft to achieve the sealing effect, and the outer circle of the oil seal is assembled on an inner hole of the brake disc. The brake disc and the dustproof cover are locked on the hub through a gasket and a brake disc bolt; the outer circle of the oil seal comprises a half rubber coating and an outer wrapping framework, and the half rubber coating and the outer wrapping framework of the oil seal are in interference fit with an inner hole of the brake disc to achieve the sealing effect. The three-ton loader drive axle wheel edge oil seal is simple and compact in structure, convenient to assemble, good in oil seal sealing effect and reliable to use, and solves the problems that an existing three-ton loader drive axle wheel edge oil seal fails in sealing and leaks oil due to aging of oil seal outer rubber caused by high temperature of a brake disc due to frequent braking.

Description

TECHNICAL FIELD

[0001] The utility model relates to loader drive axle wheel edge assembly technical field, concretely relates to 3 tons loader drive axle wheel edge oil seal structure. BACKGROUND

[0002] The engineering machinery wheel loader often works under the harsh environment, especially the coal mine, the mine, the silt condition, and the damage rate of the loader drive axle wheel hub oil seal is higher. The existing 3 tons loader drive axle wheel hub oil seal generally adopts the outer ring rubber coating structure and is assembled on the brake disc. The loader drive axle wheel edge oil seal structure has the following defects: when the loader is working, the brake is frequently stepped, the brake disc generates heat under the frequent braking and friction, the highest temperature can reach 300 DEG C, the heat is transmitted to the oil seal through the heat conduction, the outer rubber coating high temperature resistance is only 120 DEG C, therefore under the continuous high temperature, the aging that will be difficult to avoid makes the size shrinkage small, leads to the sealing failure phenomenon that cannot be matched with the brake disc, continues to use, and finally leads to the drive axle wheel edge oil leakage failure, reduces the service life of the drive axle. SUMMARY

[0003] The utility model discloses a kind of 3 tons loader drive axle wheel edge oil seal structures of simple structure, compact structure, easy assembly, good oil seal sealing effect, reliable use, solve the existing 3 tons loader drive axle wheel edge oil seal due to brake frequently caused brake disc high temperature and cause oil seal outer rubber coating aging to lead to oil seal sealing failure oil leakage problem.

[0004] To achieve the above object, the utility model discloses 3 tons loader drive axle wheel edge oil seal structure including wheel hub 1, big taper bearing 2, support shaft 3, small taper bearing 4, brake disc 5, dust cover 6, washer 7, brake disc bolt 8, O-shaped ring 9, oil seal 10, half rubber coating 11 and outer package framework 12;The inner ring of big taper bearing 2 and small taper bearing 4 is installed on support shaft 3, and the outer ring is installed on wheel hub 1;O-shaped ring 9 is assembled on the sealing effect of the joint surface of brake disc 5 and wheel hub 1;Dust cover 6 is covered on brake disc 5, to prevent oil seal 10 from falling off and outside sandstone from falling in oil seal 10, and the outer circle of oil seal 10 is assembled on the inner hole of brake disc 5;Brake disc 5 and dust cover 6 are locked on wheel hub 1 by washer 7 and brake disc bolt 8;The outer circle of oil seal 10 includes half rubber coating 11 and outer package framework 12 two sections, and the half rubber coating 11 and outer package framework 12 of oil seal 10 are all used with interference fit between the inner hole of brake disc 5 to sealing effect.

[0005] The utility model discloses 3 tons loader drive axle wheel edge oil seal structure by changing the outer rubber coating of oil seal into half rubber coating 11 and increasing the structure of outer package framework 12, has the following technical features and beneficial effects:

[0006] 1. The addition of an outer frame 12 creates an interference fit between the oil seal and the brake disc, greatly improving the rigidity and sealing quality, ensuring reliable operation. This solves the problem of oil seal failure and leakage caused by the aging of the outer rubber coating due to high temperature of the brake disc caused by frequent braking in the existing 3-ton loader drive axle wheel side oil seal.

[0007] 2. The structure is simple and compact, easy to assemble, and has low maintenance costs. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the main cross-sectional structure of the oil seal structure on the drive axle wheel of a 3-ton loader.

[0009] Figure 2 yes Figure 1 Enlarged cross-sectional view of the oil seal installation area.

[0010] Attached reference numerals: 1. Wheel hub; 2. Large tapered bearing; 3. Support shaft; 4. Small tapered bearing; 5. Brake disc; 6. Dust cover; 7. Washer; 8. Brake disc bolt; 9. O-ring; 10. Oil seal; 11. Semi-rubber coating; 12. Outer frame. Detailed Implementation

[0011] The specific implementation of the oil seal structure for the drive axle wheel of this utility model for a 3-ton loader will be further described in detail below with reference to the accompanying drawings.

[0012] Figure 1 As shown, the 3-ton loader drive axle wheel-side oil seal structure of this utility model includes a wheel hub 1, a large tapered bearing 2, a support shaft 3, a small tapered bearing 4, a brake disc 5, a dust cover 6, a washer 7, a brake disc bolt 8, an O-ring 9, an oil seal 10, a semi-rubber coating 11, and an outer frame 12; the inner rings of the large tapered bearing 2 and the small tapered bearing 4 are mounted on the support shaft 3, and the outer rings are mounted on the wheel hub 1; the O-ring 9 is assembled on the mating surface between the brake disc 5 and the wheel hub 1 to provide a seal; the dust cover 6 covers the brake disc 5. To prevent the oil seal 10 from falling off and sand and gravel from falling into the oil seal 10, the inner hole of the oil seal 10 is fitted with the outer circle of the support shaft 3 to achieve a sealing effect. The outer circle of the oil seal 10 is mounted on the inner hole of the brake disc 5. The brake disc 5 and the dust cover 6 are locked to the wheel hub 1 by washers 7 and brake disc bolts 8. The outer circle of the oil seal 10 includes two sections: a semi-rubber coating 11 and an outer skeleton 12. Both the semi-rubber coating 11 and the outer skeleton 12 of the oil seal 10 are interference-fitted with the inner hole of the brake disc 5 to achieve a sealing effect.

[0013] The utility model discloses 3 tons loader drive axle wheel edge oil seal structure through with the outer rubber -coated of oil seal is changed to half rubber -coated 11 and increases the structure of outer package skeleton 12, and the inner hole of brake disc 5 is adopted with the interference fit of outer package skeleton 12 of oil seal 10 to start the sealing effect, and the inner hole of brake disc 5 is also interference fit with half rubber -coated 11 of oil seal 10 and plays the sealing effect, when the loader operation makes brake disc 5 produce high temperature, although the half rubber -coated 11 of oil seal 10 is aged, hardening phenomenon under high temperature, has lost the sealing effect, but the interference fit between the inner hole steel of brake disc 5 and the steel of outer package skeleton 12 still played the sealing effect, can avoid appearing the seepage oil phenomenon, effectively solved the prior art 3 tons loader operation when because of brake frequently caused brake disc 5 high temperature to make oil seal outer rubber -coated aging lead to drive axle wheel edge oil seal sealing failure and leak the problem of oil, improved the service life and reliability of drive axle.

Claims

1. A 3-ton loader drive axle wheel side oil seal structure, comprising a wheel hub (1), a large taper bearing (2), a support shaft (3), a small taper bearing (4), a brake disc (5), a dust cover (6), a gasket (7), a brake disc bolt (8), an O-ring (9), an oil seal (10), a semi-coated rubber (11), and an outer package skeleton (12); the inner ring of the large taper bearing (2) and the small taper bearing (4) is installed on the support shaft (3), and the outer ring is installed on the wheel hub (1); the O-ring (9) is assembled on the joint surface of the brake disc (5) and the wheel hub (1) to play a sealing role; the dust cover (6) covers the brake disc (5) to prevent the oil seal (10) from falling off and the sand on the outside from falling into the oil seal (10); the inner hole of the oil seal (10) cooperates with the outer circle of the support shaft (3) to achieve a sealing effect, and the outer circle of the oil seal (10) is assembled on the inner hole of the brake disc (5); the brake disc (5) and the dust cover (6) are locked on the wheel hub (1) through the gasket (7) and the brake disc bolt (8); characterized in that: The outer circle of the oil seal (10) comprises two sections of half encapsulation (11) and outer encapsulation skeleton (12), and the half encapsulation (11) and the outer encapsulation skeleton (12) of the oil seal (10) are in interference fit with the inner hole of the brake disc (5) to achieve sealing effect.

Images