Dustproof structure for steering axle master pin of wheel excavator

Abstract

The utility model discloses a dustproof structure for a steering axle master pin of a wheel excavator. The dustproof structure comprises a steering knuckle, a master pin, a bolt, a sealing ring, a bearing, an axle sleeve and an axle housing, the main pin is fixed on the steering knuckle through a bolt; the bearing is arranged in a main pin hole of the axle housing and plays a supporting role; the shaft sleeve is arranged in a main pin hole of the axle housing to achieve a wear-resistant effect; the sealing ring is arranged on the lower portion of the bearing, and a rubber lip of the sealing ring seals the bearing in the axle housing and is used for isolating the bearing from the external environment and preventing dust and silt from entering the bearing. The excavator steering axle is simple and compact in structure, convenient to assemble, low in manufacturing and maintenance cost and long in service life, and solves the problem that when an excavator steering axle in the prior art works in a severe working condition environment with more dust and silt, foreign matter easily enters a bearing part to damage the bearing.

Description

Technical Field

[0001] The utility model relates to the technical field of a steering axle assembly of a wheeled excavator, in particular to a dustproof structure of a kingpin of a steering axle of a wheeled excavator. Background Art

[0002] A common structure of the steering axle of the existing wheeled excavator is that a bearing is provided at the kingpin position, and the bearing has no dustproof structure. This structure has the following disadvantages: when the steering axle of the wheeled excavator is operated in a harsh working environment with a lot of dust and sand, foreign matter can easily enter the bearing part and damage the bearing. Summary of the invention

[0003] The purpose of the utility model is to solve the above defects and provide a wheeled excavator steering axle kingpin dustproof structure with simple and compact structure, convenient assembly, low manufacturing and maintenance costs and long service life, so as to solve the problem that foreign matter can easily enter the bearing part and damage the bearing when the steering axle of the prior art excavator operates in a harsh working environment with a lot of dust and sand.

[0004] To achieve the above purpose, the utility model of the kingpin dustproof structure of the steering axle of a wheeled excavator includes a steering knuckle 1, a kingpin 2, a bolt 3, a sealing ring 4, a bearing 5, a bushing 6, and a bridge housing 7; the kingpin 2 is fixed to the steering knuckle 1 by the bolt 3; the bearing 5 is arranged in the kingpin hole of the bridge housing 7 to play a supporting role; the bushing 6 is arranged in the kingpin hole of the bridge housing 7 to play a wear-resistant role; the sealing ring 4 is arranged at the lower part of the bearing 5, and the rubber lip of the sealing ring 4 seals the bearing 5 inside the bridge housing 7 to isolate the bearing 5 from the external environment and prevent dust and sand from entering the bearing 5.

[0005] The utility model wheel excavator steering axle kingpin dustproof structure is optimized in design, and a sealing ring is arranged at the kingpin position, which has the following technical characteristics and beneficial effects:

[0006] 1. A sealing ring is set at the kingpin position. The rubber lip of the sealing ring seals the bearing inside the axle housing to prevent foreign matter from entering the bearing when operating under harsh working conditions with a lot of dust and sand, thereby avoiding damage to the bearing and improving the reliability and service life of the steering axle;

[0007] 2. The structure is simple and compact, with low manufacturing and maintenance costs, and convenient and efficient assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 The utility model is a schematic diagram of the main sectional structure of the kingpin dustproof structure of the steering axle of a wheeled excavator.

[0009] Reference numerals: steering knuckle 1, king pin 2, bolt 3, sealing ring 4, bearing 5, bushing 6, bridge housing 7. DETAILED DESCRIPTION

[0010] The specific implementation of the kingpin dustproof structure of the steering axle of a wheeled excavator of the utility model is further described in detail below in conjunction with the accompanying drawings.

[0011] Figure 1 As shown, the utility model wheel excavator steering axle kingpin dustproof structure comprises a steering knuckle 1, a kingpin 2, a bolt 3, a sealing ring 4, a bearing 5, a bushing 6, and a bridge housing 7; the kingpin 2 is fixed to the steering knuckle 1 by the bolt 3; the bearing 5 is arranged in the kingpin hole of the bridge housing 7 to play a supporting role; the bushing 6 is arranged in the kingpin hole of the bridge housing 7 to play a wear-resistant role; the sealing ring 4 is arranged at the lower part of the bearing 5, and the rubber lip of the sealing ring 4 seals the bearing 5 inside the bridge housing 7 to isolate the bearing 5 from the external environment and prevent dust and sand from entering the bearing 5.

[0012] The above-mentioned wheeled excavator steering axle kingpin dustproof structure arranges a sealing ring at the kingpin position, and the rubber lip of the sealing ring seals the bearing inside the bridge housing, thereby preventing foreign matter from entering the bearing when operating under harsh working conditions with a lot of dust and mud, avoiding damage to the bearing, and improving the reliability and service life of the steering axle. It can effectively solve the problem that foreign matter can easily enter the bearing part and damage the bearing when the steering axle of the prior art excavator operates under harsh working conditions with a lot of dust and mud.

Claims

1. A dustproof structure for a kingpin of a steering axle of a wheeled excavator, comprising a steering knuckle (1), a kingpin (2), a bolt (3), a bearing (5), a bushing (6), and an axle housing (7); the kingpin (2) is fixed to the steering knuckle (1) by means of a bolt (3); the bearing (5) is arranged in a kingpin hole of the axle housing (7) to play a supporting role; the bushing (6) is arranged in the kingpin hole of the axle housing (7) to play a wear-resistant role; the characteristics are: It also includes a sealing ring (4); the sealing ring (4) is arranged at the lower part of the bearing (5); the rubber lip of the sealing ring (4) seals the bearing (5) inside the bridge housing (7) to isolate the bearing (5) from the external environment and prevent dust and sand from entering the bearing (5).

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