CN-224201089-U - Oil seal mounting structure of main speed reducer assembly of loader drive axle

CN224201089UCN 224201089 UCN224201089 UCN 224201089UCN-224201089-U

Abstract

The utility model discloses an oil seal mounting structure of a main speed reducer assembly of a loader drive axle, which comprises a bearing seat, a mounting shaft, an inner bearing mounting seat, an outer bearing mounting seat, a check ring mounting groove, an oil seal mounting position and a dust cover mounting position, wherein the bearing seat is fixed on a shell through bolts by the mounting flange, an outer bearing of a driving tooth and an outer bearing of a driven tooth are respectively arranged on the outer bearing mounting seat and the inner bearing mounting seat, a bearing spacer and an adjusting spacer are arranged between the outer bearing and the inner bearing mounting seat to adjust the clearance of the two bearings, the oil seal is arranged on the oil seal mounting position of the bearing seat, a hole check ring is arranged on the check ring mounting groove at the bottom of the oil seal mounting position so as to ensure that the oil seal is correctly positioned and prevented from moving towards the outer bearing side of the driving tooth during assembly, and the dust cover is embedded in the dust cover mounting position of the bearing seat. The utility model has the advantages of simple and compact structure, low manufacturing and maintenance cost, safe and reliable operation and long service life of the oil seal, and solves the problem that the service life of the oil seal is influenced by larger coaxiality deviation of the oil seal and the bearing in the prior art.

Inventors

ZENG HUI
QUE ZHIJIAN
CAI JUN
BU XIYAN

Assignees

龙工(福建)桥箱有限公司

Dates

Publication Date: 20260505
Application Date: 20250606

Claims (3)

1. A main speed reducer assembly oil seal mounting structure of a loader drive axle comprises a bearing seat (1), a dust cover (2), a flange (3), a lock nut (4), a driving tooth (5), a gasket (6), a bolt (7), an oil seal (8), a driving tooth outer bearing (10), an adjusting spacer bush (11), a bearing spacer bush (12), a driving tooth inner bearing (13), a driven tooth (14) and a reducing shell (15), wherein the bearing seat (1) is provided with a mounting flange (1.1), a mounting shaft (1.2), an inner bearing mounting seat (1.4) and an outer bearing mounting seat (1.5), the bearing seat (1) is fixed on the reducing shell (15) through the mounting flange (1.1) through bolts, the driving tooth outer bearing (10) is mounted on the outer bearing mounting seat (1.5), the driving tooth inner bearing (13) is mounted on the inner bearing mounting seat (1.4), a bearing spacer bush (12) and the adjusting spacer bush (11) are arranged between the driving tooth outer bearing (10) and the driving tooth inner bearing (13) and are used for adjusting the clearance of the bearing seat, the bearing seat (1.1) is characterized in that the bearing seat (1) and the bearing retainer ring (1.1) are also provided with a retaining ring (8), the anti-dust device is characterized in that the oil seal (8) is arranged on an oil seal installation position (1.7) of the bearing seat (1), a check ring installation groove (1.6) is formed in the bottom of the oil seal installation position (1.7), a hole check ring (9) used for limiting the oil seal (8) is arranged on the check ring installation groove (1.6) so as to ensure that the position of the oil seal (8) is correct during assembly and prevent the oil seal (8) from moving towards one side of the driving tooth outer bearing (10) during operation, and the dust cover (2) is embedded in the dust cover installation position (1.8) of the bearing seat (1) so as to play a dust-proof role on the oil seal (8).
2. The oil seal mounting structure of the main speed reducer assembly of the loader drive axle according to claim 1, wherein a gap between the dust cover (2) and the dust cover mounting position (1.8) is controlled to be 0.25-0.5 mm so as to ensure a dust-proof effect.
3. The oil seal mounting structure of the main speed reducer assembly of the loader driving axle according to claim 1, characterized in that the bearing seat (1) is provided with a yielding groove (1.3), the yielding groove (1.3) is arranged on the outer surface of the bearing seat (1) and is positioned between the inner bearing mounting seat (1.4) and the outer bearing mounting seat (1.5), and the diameter of the yielding groove (1.3) is smaller than that of the mounting shaft (1.2), so that the bearing seat (1) is conveniently assembled on the shell reduction (15).

Description

Oil seal mounting structure of main speed reducer assembly of loader drive axle Technical Field The utility model relates to the technical field of main speed reducer assemblies of a drive axle of a loader, in particular to an oil seal mounting structure of the main speed reducer assembly of the drive axle of the loader, and particularly relates to a bearing seat structure of the main speed reducer assembly of the drive axle of the loader and a mounting structure of a bearing, an oil seal and a dust cover. Background The main speed reducer assembly of the existing loader drive axle generally comprises a reduction shell, a driving gear, a driven gear, a bearing seat, a sealing cover, a flange, a bearing and an oil seal, and the main characteristics of the structure are that the bearing seat is arranged on the reduction shell, the bearing seat arranged on the sealing cover, and the oil seal is arranged on the sealing cover; the bearing seat and the sealing cover are two parts which are respectively and independently processed, and the coaxiality deviation of the oil seal and the bearing is larger due to accumulated tolerance after assembly due to the processing precision, so that the service life of the oil seal is influenced. Disclosure of Invention The utility model aims to provide an oil seal mounting structure of a main speed reducer assembly of a loader drive axle, which has the advantages of simple and compact structure, low manufacturing and maintenance cost, safe and reliable operation and long service life of an oil seal, and solves the problem that the service life of the oil seal is influenced due to larger coaxiality deviation of the oil seal and a bearing in the prior art. In order to achieve the purpose, the main speed reducer assembly oil seal mounting structure of the loader drive axle comprises a bearing seat 1, a dust cover 2, a flange 3, a lock nut 4, a driving tooth 5, a gasket 6, a bolt 7, an oil seal 8, a hole retainer 9, a driving tooth outer bearing 10, an adjusting spacer 11, a bearing spacer 12, a driving tooth inner bearing 13, a driven tooth 14 and a reducing shell 15, wherein the bearing seat 1 is provided with a mounting flange 1.1, a mounting shaft 1.2, an inner bearing mounting seat 1.4, an outer bearing mounting seat 1.5, a retainer mounting groove 1.6, an oil seal mounting position 1.7 and a dust cover mounting position 1.8, the bearing seat 1 is fixed on the reducing shell 15 through bolts by the mounting flange 1.1, the driving tooth outer bearing 10 is mounted on the outer bearing mounting seat 1.5, the driving tooth inner bearing 13 is mounted on the inner bearing mounting seat 1.4, a bearing spacer 12 and an adjusting spacer 11 are arranged between the driving tooth outer bearing 10 and the driving tooth inner bearing 13 and used for adjusting the clearance of the two bearings, the oil seal 8 is mounted on the bearing seat 1.7, the oil seal is mounted on the bottom of the bearing seat 1.8 and is mounted on the bottom of the dust cover 1.8, and the dust cover is mounted on the bottom of the bearing seat 1.8 through the bearing seat 1.8 and is mounted on the dust cover by the bearing seat 1.8, and the dust cover is mounted on the side of the dust seal and is mounted on the side of the bearing seat 1.8. The gap between the dust cover 2 and the dust cover mounting position 1.8 is controlled to be 0.25-0.5 mm, so that the dust-proof effect is ensured. The bearing seat 1 is provided with a yielding groove 1.3, the yielding groove 1.3 is arranged on the outer surface of the bearing seat 1 and is positioned between the inner bearing mounting seat 1.4 and the outer bearing mounting seat 1.5, and the diameter of the yielding groove 1.3 is smaller than that of the mounting shaft 1.2, so that the bearing seat 1 is conveniently assembled on the shell reduction 15. The loader drive axle main reducer assembly oil seal mounting structure with the structure has the following technical characteristics and beneficial effects through carrying out optimal design on the structure of the bearing seat: 1. The sealing cover in the prior art is cancelled, the sealing cover and the bearing seat in the prior art are respectively processed into one part of the bearing seat for one-time processing, and the oil seal and the bearing are both arranged on the bearing seat, so that the coaxiality is better, the processing precision and the assembly precision are effectively improved, and the part cost is saved while the service life of the oil seal is effectively prolonged. 2. The retainer 9 for holes is arranged and is arranged on the retainer mounting groove 1.6, so that the correct position of the oil seal 8 during assembly can be ensured, the oil seal 8 is prevented from moving towards one side of the driving tooth outer bearing 10 during operation, and the service life of the oil seal 8 is prolonged. 3. The provision of the relief groove 1.3 is advantageous for improving the assembly efficiency of th