Loader drive axle hub reduction gear assembly structure

Abstract

The utility model discloses a hub reduction gear assembly structure of a loader drive axle. The hub reduction gear assembly structure comprises a wheel shell, an inner gear ring, a round nut, a screw, a positioning ring, a supporting shaft, a spacer bush and a bearing. An outer ring of the bearing is matched with an inner hole seat of the wheel shell, and an inner ring of the bearing is matched with an inner gear ring which is arranged on a supporting shaft; the positioning ring is located between the supporting shaft and the inner gear ring. The round nut is installed at the end of the supporting shaft and used for adjusting the bearing gap. The screw located in a round nut screw hole is used for preventing the round nut from loosening. The spacer bush is arranged at the bearing position of the root of the inner gear ring, a large chamfer is arranged at one end of the spacer bush, the R angle of the root of the inner gear ring is in large-radian transition so as to avoid breakage of the bearing position of the inner gear ring due to stress concentration, and the R angle of the spacer bush is used for avoiding the large R angle of the inner gear ring. The loading machine drive axle is simple and compact in structure, low in manufacturing and maintenance cost, safe and reliable in operation and long in service life, and solves the problem that the bearing position of the inner gear ring is broken due to stress concentration of the inner gear ring of a hub reduction gear assembly when an existing loading machine drive axle is in a negative overload state.

Description

Technical Field

[0001] This utility model relates to the field of loader drive axle technology, specifically to a loader drive axle wheel-side reducer assembly structure. Background Technology

[0002] A loader drive axle experiences maximum stress at the root of the internal gear ring bearing in its wheel-side reducer assembly under overload or improper operation conditions due to the large torque transmitted by the internal gears. This wheel-side reducer assembly has the following structural drawbacks: The root of the internal gear ring bearing experiences the greatest stress under load because the bearing is a standard part with a small radius (R) at the root. To avoid assembly interference, the radius of the internal gear ring bearing in the wheel-side reducer assembly is required to be smaller than the bearing's radius. This causes stress concentration and damage to the internal gear ring of the wheel-side reducer assembly under heavy loads, easily leading to bearing breakage. Summary of the Invention

[0003] The purpose of this utility model is to provide a loader drive axle wheel-side reducer assembly structure that is simple and compact, has low manufacturing and maintenance costs, is safe and reliable in operation, and has a long service life, thereby solving the problem of internal gear ring bearing seat fracture caused by stress concentration in the existing loader drive axle wheel-side reducer assembly under heavy load.

[0004] To achieve the above objectives, the loader drive axle wheel-side reducer assembly of this utility model includes a wheel housing 1, an internal gear ring 2, a round nut 3, a screw 4, a positioning ring 5, a support shaft 6, a spacer 7, and a bearing 8. The outer ring of the bearing 8 mates with the inner hole seat of the wheel housing 1, and the inner ring mates with the internal gear ring 2, which is mounted on the support shaft 6. The positioning ring 5 is located between the support shaft 6 and the internal gear ring 2. The round nut 3 is mounted at the end of the support shaft 6 to adjust the bearing clearance, and the screw 4 located in the screw hole of the round nut 3 is used to prevent the round nut 3 from loosening. The spacer 7 is mounted at the root bearing position of the internal gear ring 2, and one end of the spacer 7 is provided with a large chamfered spacer R angle 9. The root R angle 10 of the internal gear ring adopts a large arc transition to avoid the internal gear ring bearing position from breaking due to stress concentration. The spacer R angle 9 is used to accommodate the large R angle of the internal gear ring.

[0005] The addition of a spacer to the above-mentioned loader drive axle wheel-side reducer assembly structure has the following technical features and beneficial effects:

[0006] 1. Add a spacer at the mating position of the bearing and the internal gear ring. One end of the spacer is chamfered with a large radius to accommodate the large radius of the internal gear ring. This allows the root of the internal gear ring bearing in the wheel-side reducer assembly to have a large radius transition that meets product requirements, significantly reducing stress. This ensures that the stress at the root of the internal gear ring bearing will not exceed the material properties when the drive axle is under overload. This avoids the problem that the radius of the internal gear ring in the original structure could not be designed to be large, ultimately improving the reliability of the drive axle.

[0007] 2. This structure is simple and compact, with low manufacturing cost, safe and reliable operation, and long service life. It solves the problem of internal gear ring bearing seat fracture caused by stress concentration in the wheel-side reducer assembly of existing loader drive axles under heavy loads. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the main cross-sectional structure of the loader drive axle wheel-side reducer assembly of this utility model.

[0009] Figure 2 yes Figure 1 Schematic diagram of the main sectional structure of the central partition sleeve 7.

[0010] Figure 3 yes Figure 1 Schematic diagram of the main sectional structure of the internal gear ring 2.

[0011] Reference numerals: 1. Wheel housing; 2. Internal gear ring; 3. Round nut; 4. Screw; 5. Positioning ring; 6. Support shaft; 7. Spacer; 8. Bearing; 9. Spacer radius (R-angle); 10. Root radius (R-angle) of the internal gear ring. Detailed Implementation

[0012] The structure of the loader drive axle wheel-side reducer assembly of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0013] Figures 1-3 As shown, the loader drive axle wheel-side reducer assembly of this utility model includes a wheel housing 1, an internal gear ring 2, a round nut 3, a screw 4, a positioning ring 5, a support shaft 6, a spacer 7, and a bearing 8. The outer ring of the bearing 8 mates with the inner hole seat of the wheel housing 1, and the inner ring mates with the internal gear ring 2, which is mounted on the support shaft 6. The positioning ring 5 is located between the support shaft 6 and the internal gear ring 2. The round nut 3 is installed at the end of the support shaft 6 to adjust the bearing clearance, and the screw 4 located in the screw hole of the round nut 3 is used to prevent the round nut 3 from loosening. The spacer 7 is installed at the root bearing position of the internal gear ring 2. One end of the spacer 7 is provided with a large chamfered spacer R angle 9. The root R angle 10 of the internal gear ring adopts a large arc transition to avoid the internal gear ring bearing position from breaking due to stress concentration. The spacer R angle 9 is used to make way for the large R angle of the internal gear ring.

[0014] In the case of overload operation, the wheel-side reducer assembly of the loader drive axle of this utility model has an additional spacer 7. The spacer 7 has a large chamfered spacer R angle 9 to allow for displacement. Therefore, the root R angle 10 of the internal gear ring can adopt a larger R angle. After the root R angle 10 of the internal gear ring is increased, the stress concentration is significantly reduced, and the problem of internal gear ring bearing seat fracture caused by the load exceeding the material strength is avoided.

Claims

1. A loader drive axle wheel-side reducer assembly structure, comprising a wheel housing (1), an internal gear ring (2), a round nut (3), a screw (4), a positioning ring (5), a support shaft (6), and a bearing (8); the outer ring of the bearing (8) mates with the inner bore of the wheel housing (1), and the inner ring mates with the internal gear ring (2), which is mounted on the support shaft (6); the positioning ring (5) is located between the support shaft (6) and the internal gear ring (2); the round nut (3) is mounted on the end of the support shaft (6) for adjusting the bearing clearance, and the screw (4) located in the screw hole of the round nut (3) is used to prevent the round nut (3) from loosening; characterized in that, It also includes a spacer (7) which is installed at the root bearing position of the internal gear ring (2). One end of the spacer (7) is provided with a large chamfered spacer R angle (9). The root R angle (10) of the internal gear ring adopts a large arc transition to avoid the internal gear ring bearing position from breaking due to stress concentration. The spacer R angle (9) is used to make way for the large R angle of the internal gear ring.

Images