Loader drive axle wheel edge oil seal structure

Abstract

The wheel edge oil seal structure comprises a brake disc, a wheel shell, a bearing, a supporting shaft, an oil seal, a bolt and a pressing plate, rubber layers are arranged on the two end faces of the oil seal, the supporting shaft serves as a supporting component, the bearing is assembled on the outer ring of the supporting shaft, and the outer ring of the bearing is matched with the wheel shell; the brake disc provided with the oil seal and the pressing plate are locked on the wheel shell through bolts. The pressing plate is tightly pressed on the outer ring rubber layer of the oil seal, and the compression amount is 1 mm. The wheel edge oil seal is simple in structure, low in manufacturing and maintenance cost, safe and reliable to use and long in service life, and solves the problem of abrasion and oil leakage caused by the fact that an outer ring of a wheel edge oil seal of a loader drive axle is shortened after being heated and aged for a long time in the prior art.

Description

Technical Field

[0001] The utility model relates to the technical field of wheel side assemblies of loader drive axles, in particular to a wheel side oil seal structure of a loader drive axle. Background Art

[0002] In the prior art, a common structure of the wheel oil seal of the loader drive axle is to set the wheel reducer oil seal in the inner hole of the brake disc. This structure has the following disadvantages: when working under heavy load and braking frequently, the friction between the brake friction plate and the brake disc generates high temperature, and the heat is transmitted to the oil seal through the brake disc. Since the outer ring of the oil seal is made of nitrile rubber, the outer ring will shrink by about 0.3mm after long-term heat aging. Since the interference fit of the oil seal is about 0.3mm, there is no interference after the outer ring is reduced, which causes the outer ring of the oil seal to wear and cause oil leakage. Summary of the invention

[0003] The utility model aims to solve the above defects and provide a loader drive axle wheel side oil seal structure with simple structure, low manufacturing and maintenance costs, safe and reliable use and long oil seal service life, so as to solve the problem of wear and oil leakage caused by the outer ring of the loader drive axle wheel side oil seal shrinking after long-term heat aging in the prior art.

[0004] To achieve the above purpose, the utility model provides a wheel side oil seal structure for a loader driving axle, comprising a brake disc 1, a wheel housing 2, a bearing 3, a support shaft 4, an oil seal 5, a bolt 6 and a pressure plate 7. Both end surfaces of the oil seal 5 are provided with a rubber layer. The support shaft 4 serves as a supporting component, and its outer ring is equipped with a bearing 3. The outer ring of the bearing 3 matches the wheel housing 2. The brake disc 1 equipped with the oil seal 5 and the pressure plate 7 are locked on the wheel housing 2 by bolts 6. The pressure plate 7 is pressed against the outer ring rubber layer of the oil seal 5, and the compression amount is 1 mm.

[0005] The wheel side oil seal structure of the loader drive axle of the above structure has the following technical characteristics and beneficial effects through optimizing the design on the original structure:

[0006] 1. Add an oil seal pressure plate. The outer ring of the oil seal is pressed by the pressure plate. There are rubber layers on both ends of the oil seal. The oil seal presses the outer ring position through the pressure plate. After pressing, the rubber layers on the upper and lower ends of the oil seal form a large compression. The friction force of pressing can ensure that the outer ring of the oil seal is fixed on the brake disc;

[0007] 2. The outer ring of the oil seal is pressed by the pressure plate. Due to the large compression, it can ensure that there is still compression after the rubber layer of the oil seal shrinks at high temperature, ensuring that the oil seal does not run away from the outer ring, ultimately improving the reliability of the drive axle and reducing the maintenance cost of the drive axle;

[0008] 3. The structure is simple and compact, with low manufacturing and maintenance costs, reliable quality, and long service life of the oil seal, which solves the problem of wear and oil leakage caused by the shrinkage of the outer ring of the nitrile rubber oil seal on the wheel side of the loader drive axle in the prior art after long-term heat aging. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 The utility model is a main sectional structural schematic diagram of a wheel side oil seal structure of a loader driving axle.

[0010] Reference numerals: brake disc 1 , wheel housing 2 , bearing 3 , support shaft 4 , oil seal 5 , bolt 6 , pressure plate 7 . DETAILED DESCRIPTION

[0011] The specific implementation of the wheel side oil seal structure of a loader drive axle of the utility model is further described in detail below in conjunction with the accompanying drawings.

[0012] Figure 1 As shown, the utility model is a wheel side oil seal structure of a loader driving axle, comprising a brake disc 1, a wheel housing 2, a bearing 3, a support shaft 4, an oil seal 5, a bolt 6 and a pressure plate 7, both end surfaces of the oil seal 5 are provided with a rubber layer, the support shaft 4 is used as a supporting component, and its outer ring is equipped with a bearing 3, and the outer ring of the bearing 3 matches the wheel housing 2; the brake disc 1 equipped with the oil seal 5 and the pressure plate 7 are locked on the wheel housing 2 by bolts 6; the pressure plate 7 is pressed on the outer ring rubber layer of the oil seal 5, and the compression amount is 1mm.

Claims

1. A wheel side oil seal structure for a loader driving axle, comprising a brake disc (1), a wheel housing (2), a bearing (3), a support shaft (4), an oil seal (5) and a bolt (6), wherein both end surfaces of the oil seal (5) are provided with a rubber layer, the support shaft (4) is used as a supporting component, and its outer ring is equipped with a bearing (3), and the outer ring of the bearing (3) matches the wheel housing (2); wherein the characteristics are: It also includes a pressure plate (7); the brake disc (1) equipped with an oil seal (5) and the pressure plate (7) are locked on the wheel housing (2) through bolts (6), and the pressure plate (7) is pressed against the outer ring rubber layer of the oil seal (5) with a compression amount of 1 mm.

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