CN-224201088-U - Dust-proof structure for wheel edge oil seal of drive axle of backhoe loader

Abstract

The utility model discloses a wheel edge oil seal dustproof structure of a drive axle of an excavating loader, which comprises a hub and a steering knuckle, wherein an annular gap is formed in the outer circle of the end face of an oil seal mounting seat of the hub, an annular groove is formed in an oil seal mounting shaft of the steering knuckle, and the annular groove is sleeved on the annular gap to form a dustproof structure for an oil seal. The utility model has the advantages of simple and compact structure, low manufacturing and maintenance cost, good dustproof effect and reliable use, and solves the problems that the dustproof effect of an oil seal is poor and the dustproof cover is easy to be impacted and deformed to interfere with a wheel shell in the operation by adopting the dustproof cover in the prior art.

Inventors

• ZENG HUI
• QUE ZHIJIAN
• Shen Zhize
• CAI JUN

Assignees

• 龙工(福建)桥箱有限公司

Dates

Publication Date

20260505

Application Date

20250606

Claims (2)

1. 1. A dust-proof structure of an oil seal of a drive axle rim of an excavating loader is characterized by comprising a hub (1) and a steering knuckle (2), wherein an annular gap (1-1) is formed in the outer circle of the end face of an oil seal mounting seat of the hub (1), an annular groove (2-1) is formed in an oil seal mounting shaft of the steering knuckle (2), and the annular groove (2-1) is sleeved on the annular gap (1-1) to form a dust-proof structure of an oil seal (3).
2. 2. The dust-proof structure of the driving axle wheel edge oil seal of the backhoe loader according to claim 1, wherein the difference between the inner diameter of the annular groove (2-1) and the outer diameter of the annular gap (1-1) is 0.2-0.3 mm, and the gap between the end face of the annular groove (2-1) and the bottom plane of the annular gap (1-1) is 0.3-0.4 mm.

Description

Dust-proof structure for wheel edge oil seal of drive axle of backhoe loader Technical Field The utility model relates to the technical field of drive axles of backhoe loaders, in particular to an oil seal dustproof structure for a wheel edge of a drive axle of a backhoe loader. Background The wheel edge oil seal of the drive axle of the loader-digger is an important part of the drive axle of the loader-digger, plays a role in sealing oil for the whole wheel edge system, and ensures that gear parts of the whole wheel edge system are not damaged due to lack of lubrication in the working process. The existing drive axle structure of the backhoe loader is provided with a dust cover on a steering knuckle, and the outer circle of the dust cover wraps a wheel casing oil seal mounting hole so as to achieve a dust-proof effect. The oil seal dustproof structure has the following defects that firstly, the ovality of the dustproof cover is not easy to control, in order to ensure that the dustproof cover and the wheel shell are not interfered, the gap is designed to be large, so that the dustproof effect is poor, secondly, when the dustproof cover is impacted and bumped by stones on the ground in the use process, the dustproof cover has deformation risk, and the dustproof cover is easy to interfere with the wheel shell after deformation, so that abnormal noise occurs in the working process, and the driving feeling is influenced. Disclosure of Invention The utility model aims to provide the dustproof structure of the driving axle wheel edge oil seal of the excavating loader, which has the advantages of simple and compact structure, low manufacturing and maintenance cost, good dustproof effect and reliable use, and solves the problems that the dustproof effect of the oil seal is poor and the dustproof cover is easy to be impacted and deformed to interfere with a wheel shell when in operation due to the adoption of the dustproof cover in the prior art. In order to achieve the purpose, the wheel edge oil seal dustproof structure of the drive axle of the excavating loader comprises a hub 1 and a knuckle 2, wherein an annular gap 1-1 is formed in the outer circle of the end face of an oil seal mounting seat of the hub 1, an annular groove 2-1 is formed in an oil seal mounting shaft of the knuckle 2, and the annular groove 2-1 is sleeved on the annular gap 1-1 to form a dustproof structure for an oil seal 3. The difference between the inner diameter of the annular groove 2-1 and the outer diameter of the annular gap 1-1 is 0.2-0.3 mm, and the gap between the end face of the annular groove 2-1 and the bottom plane of the annular gap 1-1 is 0.3-0.4 mm. Above-mentioned backhoe loader transaxle wheel limit oil blanket dustproof construction through the local structure that changes backhoe loader transaxle wheel limit wheel hub and knuckle, cancels the dust cover simultaneously to design a new dustproof construction, have following technical characteristics and beneficial effect: 1. The novel dustproof structure is formed by arranging 1 annular gap 1-1 on the hub 1 and 1 annular groove 2-1 on the oil seal mounting shaft of the knuckle 2, so that the dustproof cover in the prior art is omitted, and the material cost is reduced while the dustproof effect of the wheel edge oil seal is improved; 2. The annular gap 1-1 and the annular groove 2-1 are manufactured through lathe turning, the machining precision is controllable, the difference value between the inner diameter of the annular groove 2-1 and the outer diameter of the annular gap 1-1 can be controlled to be 0.2-0.3 mm, the gap between the end face of the annular groove 2-1 and the bottom plane of the annular gap 1-1 can be controlled to be 0.3-0.4 mm, and the dustproof effect of the oil seal 3 is ensured; 3. The novel oil seal has the advantages of simple and compact structure, low manufacturing cost, safe and reliable operation and long service life, and solves the problems that the dustproof effect of an oil seal is poor due to the adoption of the dustproof cover in the prior art, and the dustproof cover is easy to be impacted and deformed to cause interference with a wheel casing during operation. Drawings FIG. 1 is a schematic diagram of a main sectional structure of a dust seal structure for a drive axle rim of an excavating loader of the present utility model. Fig. 2 is an enlarged partial cross-sectional schematic view of the oil seal dust area of fig. 1. Reference numerals comprise a hub 1, an annular gap 1-1, an annular groove 2-1, a knuckle 2 and an oil seal 3. Detailed Description The following describes the specific embodiments of the utility model in further detail with reference to the accompanying drawings. The dust-proof structure of the driving axle wheel edge oil seal of the excavating and loading machine comprises a hub 1 and a knuckle 2, wherein an annular gap 1-1 is formed in the outer circle of the end face of an oil seal mounting seat of the hub 1, an an