Loader drive axle main reducer assembly oil seal installation structure
By optimizing the bearing housing structure of the loader drive axle main reducer assembly, the oil seal is directly mounted on the bearing housing. Through the design of retaining rings and dust covers, the problem of coaxiality deviation between the oil seal and the bearing is solved, thereby improving the service life and assembly accuracy of the oil seal and reducing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LONGGONG FUJIAN QIAOXIANG CO LTD
- Filing Date
- 2025-06-06
- Publication Date
- 2026-05-05
AI Technical Summary
In the existing loader drive axle main reducer assembly, the coaxiality deviation between the oil seal and the bearing is relatively large, which affects the service life of the oil seal.
By optimizing the bearing housing structure, the oil seal is directly installed on the bearing housing. The design of the retaining ring and dust cover ensures the correct position of the oil seal and its dustproof effect. The sealing cover is eliminated, and the bearing housing is machined in one go, improving coaxiality and assembly accuracy.
It extends the service life of oil seals, reduces parts costs, improves assembly efficiency and operational safety, and features a simple and compact structure with low maintenance costs.
Smart Images
Figure CN224201089U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of loader drive axle main reducer assembly, and in particular to the oil seal mounting structure of the loader drive axle main reducer assembly, specifically to the bearing housing structure and the mounting structure of the bearing, oil seal and dust cover of the loader drive axle main reducer assembly. Background Technology
[0002] The existing loader drive axle main reducer assembly generally includes a reducer housing, driving and driven gears, bearing housing, sealing cover, flange, bearing, and oil seal. The main feature of this structure is that the bearing housing is mounted on the reducer housing, the sealing cover is mounted on the bearing housing, and the oil seal is mounted on the sealing cover. The drawback is that because the bearing housing and sealing cover are two parts and are machined separately, due to the limitations of machining precision, the cumulative tolerances after assembly will cause a large deviation in the coaxiality between the oil seal and the bearing, thus affecting the service life of the oil seal. Summary of the Invention
[0003] The purpose of this utility model is to provide a loader drive axle main reducer assembly oil seal installation structure that is simple and compact in structure, low in manufacturing and maintenance costs, safe and reliable in operation, and has a long service life, thereby solving the problem in the prior art where the service life of the oil seal is affected by the large coaxiality deviation between the oil seal and the bearing.
[0004] To achieve the above objectives, the oil seal mounting structure of the loader drive axle main reducer assembly of this utility model includes a bearing housing 1, a dust cover 2, a flange 3, a locking nut 4, a drive gear 5, a gasket 6, a bolt 7, an oil seal 8, a retaining ring 9, an outer bearing of the drive gear 10, an adjusting sleeve 11, a bearing sleeve 12, an inner bearing of the drive gear 13, a driven gear 14, and a reducer housing 15. The bearing housing 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 retaining ring mounting groove 1.6, an oil seal mounting position 1.7, and a dust cover mounting position 1.8. The bearing housing 1 is fixed to the reducer housing 15 by bolts via the mounting flange 1.1. The outer bearing of the drive gear 10 is mounted on... The driving gear internal bearing 13 is mounted on the outer bearing mounting seat 1.5 and the inner bearing mounting seat 1.4. A bearing spacer 12 and an adjusting spacer 11 are provided between the driving gear external bearing 10 and the driving gear internal bearing 13 to adjust the clearance of the two bearings. The oil seal 8 is mounted on the oil seal mounting position 1.7 of the bearing seat 1. The bottom of the oil seal mounting position 1.7 is provided with a retaining ring mounting groove 1.6. A retaining ring 9 is installed in the retaining ring mounting groove 1.6 to limit the oil seal 8, so as to ensure that the oil seal 8 is correctly positioned during assembly and to prevent the oil seal 8 from moving to the side of the driving gear external bearing 10 during operation. The dust cover 2 is embedded in the dust cover mounting position 1.8 of the bearing seat 1 to protect the oil seal 8 from dust.
[0005] The gap between the dust cover 2 and the dust cover mounting position 1.8 is controlled at 0.25-0.5mm to ensure the dustproof effect.
[0006] The bearing housing 1 is provided with a relief groove 1.3, which is located on the outer surface of the bearing housing 1 and between the inner bearing mounting seat 1.4 and the outer bearing mounting seat 1.5. The diameter of the relief groove 1.3 is smaller than the diameter of the mounting shaft 1.2 to facilitate the assembly of the bearing housing 1 onto the housing 15.
[0007] The oil seal mounting structure of the loader drive axle main reducer assembly described above, through optimized design of the bearing housing structure, has the following technical features and beneficial effects:
[0008] 1. Improve the coaxiality of the oil seal and bearing after assembly, thereby extending the service life of the oil seal; eliminate the existing sealing cover and install the oil seal on the bearing housing, changing the separate machining of the sealing cover and bearing housing to a one-time machining of the bearing housing as a single part. In addition, since both the oil seal and bearing are installed on the bearing housing, their coaxiality is better, effectively improving machining accuracy and assembly accuracy, and saving parts costs while effectively extending the service life of the oil seal.
[0009] 2. Setting a retaining ring 9 for the hole and installing it on the retaining ring mounting groove 1.6 can ensure that the oil seal 8 is in the correct position during assembly and prevent the oil seal 8 from moving to the side of the drive gear external bearing 10 during operation, thereby improving the service life of the oil seal 8.
[0010] 3. Setting a clearance groove 1.3 is beneficial to improving the assembly efficiency of bearing housing 1 and reducing shell 15.
[0011] 4. The structure is simple and compact, with low manufacturing and maintenance costs, safe and reliable operation, and long service life of the oil seal. It solves the problem that the service life of the oil seal is affected by the large coaxiality deviation between the oil seal and the bearing in the existing technology. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the main cross-sectional structure of the oil seal mounting structure of the main reducer assembly of the loader drive axle.
[0013] Figure 2 yes Figure 1 Schematic diagram of the main sectional structure of the bearing housing 1.
[0014] Reference numerals in the attached drawings: 1. Bearing housing; 1.1. Mounting flange; 1.2. Mounting shaft; 1.3. Clearance groove; 1.4. Inner bearing mounting seat; 1.5. Outer bearing mounting seat; 1.6. Retaining ring mounting groove; 1.7. Oil seal mounting position; 1.8. Dust cover mounting position; 2. Dust cover; 3. Flange; 4. Locking nut; 5. Driven gear; 6. Gasket; 7. Bolt; 8. Oil seal; 9. Retaining ring for hole; 10. Outer bearing of drive gear; 11. Adjusting spacer; 12. Bearing spacer; 13. Inner bearing of drive gear; 14. Driven gear; 15. Reduction shell. Detailed Implementation
[0015] The oil seal mounting structure of the loader drive axle main reducer assembly of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0016] Figures 1-2 As shown, the oil seal mounting structure of the loader drive axle main reducer assembly of this utility model includes a bearing housing 1, a dust cover 2, a flange 3, a locking nut 4, a drive gear 5, a gasket 6, a bolt 7, an oil seal 8, a retaining ring for the hole 9, an outer bearing of the drive gear 10, an adjusting spacer 11, a bearing spacer 12, an inner bearing of the drive gear 13, a driven gear 14, and a reducer housing 15. The bearing housing 1 is provided with a mounting flange 1.1, a mounting shaft 1.2, a clearance groove 1.3, an inner bearing mounting seat 1.4, an outer bearing mounting seat 1.5, a retaining ring mounting groove 1.6, an oil seal mounting position 1.7, and a dust cover mounting position 1.8. The bearing housing 1 is fixed to the reducer housing 15 by bolts through the mounting flange 1.1. The outer bearing of the drive gear 10 is mounted on the outer bearing mounting seat 1.5, and the inner bearing of the drive gear 13 is mounted on the inner bearing mounting seat 1.4. A bearing spacer 12 and an adjusting spacer are provided between the outer bearing of the drive gear 10 and the inner bearing of the drive gear 13. 11. Used to adjust the clearance of the two bearings; the oil seal 8 is installed on the oil seal mounting position 1.7 of the bearing housing 1. The bottom of the oil seal mounting position 1.7 is provided with a retaining ring mounting groove 1.6. A retaining ring 9 for limiting the oil seal 8 is installed in the retaining ring mounting groove 1.6 to ensure that the oil seal 8 is correctly positioned during assembly and to prevent the oil seal 8 from moving towards the external bearing 10 of the drive gear during operation; the dust cover 2 is embedded in the dust cover mounting position 1.8 of the bearing housing 1 to prevent dust from entering the oil seal 8. The gap between the dust cover 2 and the dust cover mounting position 1.8 is controlled at 0.25-0.5mm to ensure the dust prevention effect and improve the service life of the oil seal 8; the clearance groove 1.3 is provided on the outer surface of the bearing housing 1 and located between the inner bearing mounting seat 1.4 and the outer bearing mounting seat 1.5. The diameter of the clearance groove 1.3 is smaller than the diameter of the mounting shaft 1.2 to facilitate the assembly of the bearing housing 1 onto the reducing shell 15.
Claims
1. A loader drive axle main reducer assembly oil seal mounting structure, comprising a bearing housing (1), a dust cover (2), a flange (3), a lock nut (4), a drive gear (5), a gasket (6), a bolt (7), an oil seal (8), a drive gear outer bearing (10), an adjusting sleeve (11), a bearing sleeve (12), a drive gear inner bearing (13), a driven gear (14), and a reducer housing (15); the bearing housing (1) is provided with a mounting flange (1.1), a mounting shaft (1.2), and an inner bearing. Mounting seat (1.4) and outer bearing mounting seat (1.5), the bearing seat (1) is fixed to the housing (15) by bolts via mounting flange (1.1); the active gear outer bearing (10) is mounted on the outer bearing mounting seat (1.5), and the active gear inner bearing (13) is mounted on the inner bearing mounting seat (1.4); a bearing spacer (12) and an adjusting spacer (11) are provided between the active gear outer bearing (10) and the active gear inner bearing (13) for adjusting the clearance of the two bearings; characterized in that, It also includes a retaining ring (9) for holes. The bearing housing (1) is also provided with a retaining ring mounting groove (1.6), an oil seal mounting position (1.7) and a dust cover mounting position (1.8). The oil seal (8) is installed on the oil seal mounting position (1.7) of the bearing housing (1). The bottom of the oil seal mounting position (1.7) is provided with a retaining ring mounting groove (1.6). The retaining ring (9) for holes used to limit the oil seal (8) is installed on the retaining ring mounting groove (1.6) to ensure that the oil seal (8) is in the correct position during assembly and to prevent the oil seal (8) from moving to the side of the drive gear external bearing (10) during operation. The dust cover (2) is embedded in the dust cover mounting position (1.8) of the bearing housing (1) to protect the oil seal (8) from dust.
2. The oil seal mounting structure for the loader drive axle main reducer assembly according to claim 1, characterized in that, The gap between the dust cover (2) and the dust cover mounting position (1.8) is controlled at 0.25~0.5mm to ensure the dustproof effect.
3. The oil seal mounting structure for the loader drive axle main reducer assembly according to claim 1, characterized in that, The bearing housing (1) is provided with a relief groove (1.3), which is located on the outer surface of the bearing housing (1) and between the inner bearing mounting seat (1.4) and the outer bearing mounting seat (1.5). The diameter of the relief groove (1.3) is smaller than the diameter of the mounting shaft (1.2) to facilitate the assembly of the bearing housing (1) onto the housing (15).