Dustproof 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 a backhoe loader. The wheel edge oil seal dustproof structure comprises a hub and a steering knuckle. The hub is provided with an annular notch in the outer circle of the end face of the oil seal installation base, an annular groove is formed in the position of the oil seal installation shaft of the steering knuckle, the annular notch is sleeved with the annular groove, and a dustproof structure for the oil seal is formed. The dustproof oil seal is simple and compact in structure, low in manufacturing and maintenance cost, good in dustproof effect and reliable to use, and solves the problems that the dustproof effect of the oil seal is poor due to the adoption of a dustproof cover, and the dustproof cover is easy to collide and deform during operation to cause interference with a wheel shell in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of excavator loader drive axle technology, specifically to a dustproof structure for the wheel-side oil seal of an excavator loader drive axle. Background Technology

[0002] The wheel-side oil seal of a backhoe loader drive axle is a crucial component, sealing the entire wheel-side system to prevent damage to the gears due to lack of lubrication during operation. One existing backhoe loader drive axle structure features a dust cover on the steering knuckle. This dust cover's outer circumference encloses the oil seal mounting hole on the wheel housing for dust protection. However, this dust seal structure has the following drawbacks: First, because the dust cover is a stamped steel part, its ovality is difficult to control. To ensure no interference between the dust cover and the wheel housing, the clearance is designed to be relatively large, resulting in poor dust protection. Second, during use, the dust cover is susceptible to deformation from impacts or knocks by stones on the ground. Deformation can lead to interference with the wheel housing, causing abnormal noises during operation and affecting the driving experience. Summary of the Invention

[0003] The purpose of this utility model is to provide a dustproof structure for the oil seal on the drive axle wheel of an excavator loader that is simple and compact in structure, low in manufacturing and maintenance costs, has good dustproof effect, and is reliable in use. This solves the problems of poor dustproof effect of oil seals due to the use of dust covers in the existing technology, and the dust cover being easily deformed by impact during operation, which leads to interference with the wheel housing.

[0004] To achieve the above objectives, the dustproof structure for the oil seal on the drive axle of the excavator loader of this utility model includes a wheel hub 1 and a steering knuckle 2; the wheel hub 1 has an annular notch 1-1 on the outer circle of the end face of the oil seal mounting seat, and an annular groove 2-1 is provided at the oil seal mounting shaft of the steering knuckle 2. The annular groove 2-1 fits onto the annular notch 1-1 to form a dustproof structure for the oil seal 3.

[0005] The difference between the inner diameter of the annular groove 2-1 and the outer diameter of the annular notch 1-1 is 0.2 to 0.3 mm, and the gap between the end face of the annular groove 2-1 and the bottom plane of the annular notch 1-1 is 0.3 to 0.4 mm.

[0006] The aforementioned dustproof structure for the drive axle oil seal of the excavator loader, by changing the local structure of the wheel hub and steering knuckle of the drive axle, while eliminating the dust cover, and designing a new dustproof structure, has the following technical features and beneficial effects:

[0007] 1. By setting an annular notch 1-1 on the wheel hub 1 and an annular groove 2-1 at the oil seal mounting shaft of the steering knuckle 2, a new dustproof structure is formed, thereby eliminating the dust cover of the existing technology. While improving the dustproof effect of the wheel-side oil seal, it also reduces material costs.

[0008] 2. Both the annular notch 1-1 and the annular groove 2-1 are machined by a lathe, and the machining accuracy is controllable. The difference between the inner diameter of the annular groove 2-1 and the outer diameter of the annular notch 1-1 can be controlled within 0.2 to 0.3 mm, and the gap between the end face of the annular groove 2-1 and the bottom plane of the annular notch 1-1 can be controlled within 0.3 to 0.4 mm, thus ensuring the dustproof effect of the oil seal 3.

[0009] 3. The structure is simple and compact, with low manufacturing cost, safe and reliable operation, and long service life. It solves the problems of poor dust protection effect of oil seals due to the use of dust covers in existing technologies and the dust cover being easily deformed by impact during operation, causing interference with the wheel housing. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the main cross-sectional structure of the dustproof oil seal on the drive axle wheel of the excavator loader according to this utility model.

[0011] Figure 2 yes Figure 1 A partially enlarged cross-sectional view of the dustproof area of ​​the oil seal.

[0012] Reference numerals: hub 1, annular notch 1-1, annular groove 2-1, steering knuckle 2, oil seal 3. Detailed Implementation

[0013] The following detailed description, in conjunction with the accompanying drawings, provides a further detailed description of specific embodiments of the dustproof oil seal structure for the drive axle wheel of this excavator loader.

[0014] Figures 1-2 As shown, the dustproof structure for the wheel-side oil seal of the excavator loader drive axle of this utility model includes a wheel hub 1 and a steering knuckle 2; the wheel hub 1 has an annular notch 1-1 on the outer circle of the end face of the oil seal mounting seat, and an annular groove 2-1 is provided at the oil seal mounting shaft of the steering knuckle 2. The annular groove 2-1 fits on the annular notch 1-1 to form a dustproof structure for the oil seal 3; the difference between the inner diameter of the annular groove 2-1 and the outer diameter of the annular notch 1-1 is 0.2 to 0.3 mm, and the gap between the end face of the annular groove 2-1 and the bottom plane of the annular notch 1-1 is 0.3 to 0.4 mm.

[0015] The aforementioned dustproof structure for the wheel-side oil seal of the excavator loader drive axle eliminates the need for a dust cover in existing technologies by providing an annular notch 1-1 on the wheel hub 1 and an annular groove 2-1 at the oil seal mounting shaft of the steering knuckle 2. Both the annular notch 1-1 and the annular groove 2-1 are machined using a lathe with controllable machining precision. The difference between the inner diameter of the annular groove 2-1 and the outer diameter of the annular notch 1-1 can be controlled within 0.2 to 0.3 mm, and the gap between the end face of the annular groove 2-1 and the bottom plane of the annular notch 1-1 can be controlled within 0.3 to 0.4 mm. This improves the dustproof effect of the wheel-side oil seal while reducing material costs. Furthermore, since both the wheel hub and the steering knuckle are made of cast iron, they have good rigidity and are not easily deformed after impact, thus extending their service life. This solves the problems of poor dustproof effect of the oil seal due to the use of a dust cover in existing technologies and the interference between the dust cover and the wheel housing caused by deformation due to impact during operation.

Claims

1. A dustproof structure for the wheel-side oil seal of a loader drive axle, characterized in that, It includes a hub (1) and a steering knuckle (2); the hub (1) has an annular notch (1-1) on the outer circle of the end face of the oil seal mounting seat, and an annular groove (2-1) is provided at the oil seal mounting shaft of the steering knuckle (2). The annular groove (2-1) fits on the annular notch (1-1) to form a dustproof structure for the oil seal (3).

2. The dustproof structure for the wheel-side oil seal of the excavator loader drive axle according to claim 1, characterized in that, The difference between the inner diameter of the annular groove (2-1) and the outer diameter of the annular notch (1-1) is 0.2 to 0.3 mm, and the gap between the end face of the annular groove (2-1) and the bottom plane of the annular notch (1-1) is 0.3 to 0.4 mm.

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