Loader drive axle wheel edge sealing structure

Abstract

An oil seal seat is provided with a right-angle seam allowance, an opening of the right-angle seam allowance faces the side of a brake disc and limits a framework combined oil seal, the oil seal seat is arranged between a hub and the brake disc, and the oil seal seat and the brake disc are fixed on the hub through bolts. The matching position of the brake disc and the oil seal seat is in a stepped hole shape, the largest inner hole of the brake disc is sleeved on the largest outer circle of the oil seal seat, the second large hole is provided with an oil seal seat receding position so as to avoid interference with the oil seal seat, dustproof spigots are arranged at the positions, located at the second large hole and the third hole, of the brake disc, and the gap between the third hole at the dustproof spigots and the supporting shaft is smaller than or equal to 0.5 mm so as to ensure the dustproof effect. The dustproof seam allowance can prevent the framework combined oil seal from moving to affect sealing. The framework oil seal is simple and compact in structure, good in sealing and dustproof effect and long in service life, and solves the problems that an existing framework oil seal outer ring is installed in a brake disc inner hole, the oil seal is prone to failure due to high temperature, and the dustproof effect of the oil seal is affected due to the large fit clearance between a dustproof cover arranged at the outer end of a brake disc and a supporting shaft.

Description

TECHNICAL FIELD

[0001] The utility model relates to loader drive axle technical field, concretely relates to loader drive axle wheel edge sealing structure, especially is the sealing and oil seal protection structure of loader drive axle wheel edge speed reducer assembly. BACKGROUND

[0002] CN 217653195 U discloses a utility model patent a kind of loader drive axle wheel edge speed reducer assembly sealing structure, it includes wheel hub, O type sealing ring, brake disc, dust cover, bolt and skeleton combination oil seal;The right angle type stopper is provided with one on brake disc inner hole, skeleton combination oil seal outer ring is installed in brake disc inner hole, and dust cover is added in the outer end of brake disc.This structure has the following defects: one is that skeleton oil seal outer ring is installed in brake disc inner hole, when loader is operated for a long time and brake is more frequent, the temperature of brake disc is higher, and it is more easily transferred to skeleton oil seal outer ring, there is the hidden danger that oil seal fails due to high temperature;Two is that dust cover is added in the outer end of brake disc, because dust cover is stamping part, dust cover inner hole ovality is larger, to avoid interference after assembly with drive axle housing support shaft, it requires that the fit clearance between dust cover and support shaft needs to be larger, thereby affecting oil seal dustproof effect. SUMMARY

[0003] The utility model aims at providing a kind of loader drive axle wheel edge sealing structure with simple and compact structure, good sealing and dustproof effect, long product service life, safe and reliable operation, solve the problem that the oil seal fails due to high temperature in prior art because skeleton oil seal outer ring is installed in brake disc inner hole and the fit clearance between dust cover and support shaft in brake disc outer end is larger, which affects oil seal dustproof effect.

[0004] To achieve the above purpose, the utility model loader drive axle wheel edge sealing structure includes wheel hub 1, O type sealing ring 2, brake disc 3, oil seal seat 4, skeleton combination oil seal 5, bolt 6, bearing 7 and support shaft 8;The oil seal seat 4 is provided with right angle type stopper 4.1, the opening of the right angle type stopper 4.1 is towards brake disc 3 side, to limit skeleton combination oil seal 5, prevent skeleton combination oil seal 5 from moving towards bearing 7 after long-term work and affect sealing effect, the oil seal seat 4 is located between wheel hub 1 and brake disc 3, and oil seal seat 4 and brake disc 3 are fixed on wheel hub 1 by bolt 6;The cooperation place of brake disc 3 and oil seal seat 4 is stepped hole, the largest inner hole of which is sleeved on the largest outer circle of oil seal seat 4, and the second largest hole is provided with oil seal seat gap, to ensure compactness to avoid interference with oil seal seat 4, the brake disc 3 is provided with dust stopper 3.1 at the second largest hole and third hole, the gap between the third hole of dust stopper 3.1 and support shaft 8 is ≦0.5mm, to ensure dustproof effect, and dust stopper 3.1 prevents skeleton combination oil seal 5 from unlimitedly moving towards dust stopper 3.1 after long-term work and affecting sealing effect.

[0005] The loader drive axle sealing structure has the following technical features and advantages:

[0006] 1. The structure can effectively avoid the failure of the existing loader drive axle sealing structure caused by the temperature rise of the skeleton combined oil seal 5 after long-term braking operation while ensuring the original space compactness;

[0007] 2. The right-angle stop 4.1 on the oil seal seat 4 and the dust-proof stop 3.1 on the brake disc 3 can effectively prevent the skeleton combined oil seal 5 from being displaced too much and causing failure;

[0008] 3. The dust-proof stop 3.1 has dust-proof effect, which can effectively prevent sand and dust from contacting the skeleton combined oil seal 5, and has good dust-proof effect;

[0009] 4. The structure is simple and compact, safe and reliable in operation, and can effectively prolong the service life of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 is a main cross-sectional structure schematic diagram of the loader drive axle sealing structure of the utility model.

[0011] The drawings show: hub 1, O-shaped sealing ring 2, brake disc 3, dust-proof stop 3.1, oil seal seat 4, oil seal limiting stop 4.1, skeleton combined oil seal 5, bolt 6, bearing 7, support shaft 8. DETAILED DESCRIPTION

[0012] The specific embodiments of the loader drive axle sealing structure of the utility model will be further described in detail below with reference to the drawings.

[0013] Figure 1As shown, the loader drive axle wheel edge sealing structure of the utility model includes wheel hub 1, O-shaped sealing ring 2, brake disc 3, oil seal seat 4, skeleton combined oil seal 5, bolt 6, bearing 7 and support shaft 8;The oil seal seat 4 is provided with right-angle type stopper 4.1, and the opening of the right-angle type stopper 4.1 is towards the brake disc 3 side, so as to limit the skeleton combined oil seal 5, prevent the skeleton combined oil seal 5 from moving towards the bearing 7 after long-term work and affect the sealing effect, the oil seal seat 4 is arranged between the wheel hub 1 and the brake disc 3, and the oil seal seat 4 and the brake disc 3 are fixed on the wheel hub 1 by the bolt 6;The brake disc 3 and the oil seal seat 4 cooperation place are stepped hole, the largest inner hole is sleeved on the largest outer circle of the oil seal seat 4, the second largest hole is provided with oil seal seat accommodation, so as to ensure the compactness of space to avoid interference with the oil seal seat 4, the brake disc 3 is provided with dustproof stopper 3.1 at the second largest hole and the third hole, the third hole between the dustproof stopper 3.1 and the support shaft 8 is less than or equal to 0.5mm, so as to ensure the dustproof effect, and the dustproof stopper 3.1 prevents the skeleton combined oil seal 5 from moving unlimitedly towards the dustproof stopper 3.1 after long-term work and affecting the sealing effect.

[0014] The loader drive axle wheel edge sealing structure of the utility model increases the oil seal seat 4, which can effectively avoid the failure of the skeleton combined oil seal 5 caused by excessive temperature rise after long-term braking operation of the loader drive axle wheel edge sealing structure of the prior art on the premise of ensuring the original space compactness;On the other hand, the right-angle type stopper 4.1 is increased on the oil seal seat 4, and the dustproof stopper 3.1 is increased on the brake disc 3, which can effectively prevent the skeleton combined oil seal 5 from moving too much and causing failure, and the dustproof stopper 3.1 has dustproof effect, which can effectively prevent sand and dust from contacting the skeleton combined oil seal 5.

Claims

1. A loader drive axle wheel seal structure comprising a wheel hub (1), an O-ring seal (2), a brake disc (3), a skeleton combination oil seal (5), a bolt (6), a bearing (7) and a support shaft (8); characterized in that: It also includes an oil seal seat (4); the oil seal seat (4) is provided with a right-angle type stopper (4.1), the opening of which faces the brake disc (3) side, to limit the skeleton combined oil seal (5), prevent the skeleton combined oil seal (5) from moving towards the bearing (7) after long-term work, and affect the sealing effect, the oil seal seat (4) is arranged between the hub (1) and the brake disc (3), and the oil seal seat (4) and the brake disc (3) are fixed on the hub (1) by bolts (6); the cooperation between the brake disc (3) and the oil seal seat (4) is a stepped hole, the largest inner hole of which is sleeved on the largest outer circle of the oil seal seat (4), the second largest hole is provided with an oil seal seat gap, so as to ensure the compactness of the space to avoid interference with the oil seal seat (4), the brake disc (3) is provided with a dustproof stopper (3.1) at the second largest hole and the third hole, the gap between the third hole at the dustproof stopper (3.1) and the supporting shaft (8) is ≦0.5mm, so as to ensure the dustproof effect, and the dustproof stopper (3.1) prevents the skeleton combined oil seal (5) from moving unlimitedly towards the dustproof stopper (3.1) after long-term work, and affects the sealing effect.

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