Dustproof cover structure for wheel edge oil seal of loading machine drive axle

Abstract

The utility model discloses a loader drive axle wheel edge oil seal dust cover structure which comprises a hub, an outer cone bearing, a supporting shaft, an inner cone bearing, a brake disc bolt, a brake disc, a dust cover, an oil seal and a check ring, the inner rings of the outer cone bearing and the inner cone bearing are installed on the supporting shaft, and the outer rings are matched with the hub; the outer circle of the oil seal is assembled in an inner hole of the hub, and the inner hole of the oil seal is matched with the supporting shaft to achieve the sealing effect. The dustproof cover is tightly attached to the outside of the brake disc, the bent edge of the dustproof cover is tightly attached to and partially wraps the outer circle of the supporting shaft so as to prevent silt and pulverized coal from entering the oil seal, the dustproof effect is achieved, and the dustproof cover and the brake disc are locked and assembled on the hub through brake disc bolts. The hub oil seal is simple and compact in structure, convenient and efficient to assemble, good in sealing effect and long in service life, and solves the problems that in the prior art, a hub oil seal is in contact with pulverized coal and silt for a long time, a lip is continuously abraded, sealing of the oil seal fails, and oil leaks.

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 dust cover structure of loader drive axles, and is particularly suitable for small tonnage loaders. Background Art

[0002] Existing wheel loaders often work in harsh environments, especially in coal mines, mines, mud and sand working environments, the damage rate of the wheel hub oil seal of the loader drive axle is very high. At present, the wheel hub oil seal structure of the loader drive axle generally adopts the method of installing the skeleton oil seal on the wheel hub, and the oil seal is exposed to the air for a long time, so dust prevention of the wheel hub oil seal is particularly important. The existing technology loader drive axle generally adopts the method of welding a dust cover on the wheel side support shaft to protect the oil seal. Although this dustproof structure can block the entry of external sand and gravel to prevent the oil seal from being damaged, due to the complex process of welding the dust cover and easy deformation, it is difficult to avoid the phenomenon that the dust cover and the wheel hub oil seal are not coaxial, resulting in poor dustproof effect of the dust cover, resulting in the oil seal being in contact with coal powder, dust, mud and sand for a long time, so that some particles penetrate into the oil seal lip and continuously wear the lip, causing the oil seal to fail and eventually cause the drive axle to leak oil, reducing the reliability and service life of the drive axle. Summary of the invention

[0003] The utility model aims to solve the above defects and provide a loader drive axle wheel side oil seal dust cover structure which has a simple and compact structure, is convenient and efficient to assemble, has a good sealing effect and a long service life of the oil seal, thereby solving the problem in the prior art that the wheel hub oil seal is ineffective and leaks oil because the lip is constantly worn due to long-term contact with coal powder and mud.

[0004] To achieve the above purpose, the utility model loader drive axle wheel side oil seal dust cover structure includes a wheel hub 1, an outer cone bearing 2, a support shaft 3, an inner cone bearing 4, a brake disc bolt 5, a brake disc 6, a dust cover 7, an oil seal 8 and a retaining ring 9, the inner ring of the outer cone bearing 2 and the inner cone bearing 4 are installed on the support shaft 3, and the outer ring is matched with the wheel hub 1; the outer circle of the oil seal 8 is assembled in the inner hole of the wheel hub 1, and the inner hole of the oil seal 8 is matched with the support shaft 3 to achieve a sealing effect; the dust cover 7 is tightly attached to the outside of the brake disc 6, and its bent edge is tightly attached to and partially wraps the outer circle of the support shaft 3 to prevent mud and coal powder from entering the oil seal and play a dust-proof role, and the dust cover 7 and the brake disc 6 are locked and assembled on the wheel hub 1 through the brake disc bolt 5.

[0005] The wheel side oil seal dust cover structure of the loader driving axle has the following technical features and beneficial effects by adding a dust cover at the position of the brake disc and the support shaft:

[0006] 1. The dust cover, oil seal and wheel side support shaft have good coaxiality after assembly, and there is no welding deformation, so that the gap between the dust cover 7 and the support shaft 3 is very small, which effectively prevents coal powder and sand particles from penetrating into the oil seal lip and wearing lip. The dustproof effect is significantly better than the structure of the welded dust cover in the prior art, which improves the service life and reliability of the drive axle;

[0007] 2. The dustproof structure is simple and compact, with low production cost, convenient and efficient assembly and long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 The utility model is a main sectional structural schematic diagram of a wheel side oil seal dust cover structure of a loader driving axle.

[0009] Figure numerals: wheel hub 1, outer cone bearing 2, support shaft 3, inner cone bearing 4, brake disc bolt 5, brake disc 6, dust cover 7, oil seal 8, retaining ring 9. DETAILED DESCRIPTION

[0010] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings.

[0011] Figure 1 As shown, the utility model loader drive axle wheel side oil seal dust cover structure comprises a wheel hub 1, an outer cone bearing 2, a support shaft 3, an inner cone bearing 4, a brake disc bolt 5, a brake disc 6, a dust cover 7, an oil seal 8 and a retaining ring 9, wherein the inner rings of the outer cone bearing 2 and the inner cone bearing 4 are mounted on the support shaft 3, and the outer rings cooperate with the wheel hub 1; the outer circle of the oil seal 8 is assembled in the inner hole of the wheel hub 1, and the inner hole of the oil seal 8 cooperates with the support shaft 3 to achieve a sealing effect; the dust cover 7 is tightly attached to the outside of the brake disc 6, and its bent edge is tightly attached to and partially wraps the outer circle of the support shaft 3 to prevent mud and coal powder from entering the oil seal and play a dust-proof role, and the dust cover 7 and the brake disc 6 are locked and assembled on the wheel hub 1 through the brake disc bolt 5.

[0012] By adding a dust cover, the coaxiality of the dust cover 7, the wheel hub 1 and the support shaft 3 is improved, and the gap between the dust cover 7 and the support shaft 3 is made very small, thereby avoiding long-term contact between the oil seal and coal powder and mud, achieving a better dust prevention effect, and effectively blocking coal powder and mud particles from penetrating into the oil seal lip and wearing the lip, greatly reducing the failure of the drive axle wheel hub oil seal to leak oil, and improving the service life and reliability of the drive axle.

Claims

1. A wheel oil seal dust cover structure for a loader driving axle, comprising a wheel hub (1), an outer cone bearing (2), a support shaft (3), an inner cone bearing (4), a brake disc bolt (5), a brake disc (6), an oil seal (8) and a retaining ring (9), wherein the inner rings of the outer cone bearing (2) and the inner cone bearing (4) are mounted on the support shaft (3), and the outer rings are matched with the wheel hub (1); the outer circle of the oil seal (8) is assembled in the inner hole of the wheel hub (1), and the inner hole of the oil seal (8) is matched with the support shaft (3) to achieve a sealing effect; the characteristics are: It also includes a dust cover (7); the dust cover (7) is tightly attached to the outside of the brake disc (6), and its bent edge is tightly attached to and partially wraps the outer circle of the support shaft (3) to prevent mud and coal powder from entering the oil seal and play a dust-proof role. The dust cover (7) and the brake disc (6) are locked and assembled on the wheel hub (1) through brake disc bolts (5).

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