CN209925608U

CN209925608U - Hub assembly sealing structure of hub reduction axle

Info

Publication number: CN209925608U
Application number: CN201920552958.XU
Authority: CN
Inventors: 冯涛; 孙国晖; 苗士军
Original assignee: FAW Jiefang Automotive Co Ltd
Current assignee: FAW Jiefang Automotive Co Ltd
Priority date: 2019-04-23
Filing date: 2019-04-23
Publication date: 2020-01-10
Anticipated expiration: 2029-04-23

Abstract

The utility model provides a wheel hub assembly seal structure of wheel reduction axle, an O-shaped ring is arranged between a gear ring bracket and a shaft head, the front end surface of an oil seal seat ring is jointed with the rear end surface of an inner bearing inner ring, a gear ring is sleeved on the outer cylindrical surface of the rear ends of the shaft head and the wheel hub, and the rear end surface of a locking nut compresses the O-shaped ring and is jointed with the front end surface of the gear ring bracket; an outer oil seal is arranged between the inner surface of the front end of the inner cavity of the hub and the gear ring bracket, an inner oil seal is arranged between the inner surface of the rear end of the inner cavity of the hub and the outer surface of the oil seal seat ring, two O-shaped rings are arranged between the shaft neck of the hub and the hole wall of the central hole of the hub reduction gear shell at intervals, and lubricating grease is injected into the inner cavity of the hub; the structure avoids the influence of gear oil impurities in the hub reduction gear on the hub bearing, prolongs the service life of the hub bearing, reduces the oil leakage occurrence frequency of the hub assembly, improves the sealing reliability, cancels an oil baffle disc and an oil baffle cover which are sealed in an auxiliary manner, and reduces the cost.

Description

Hub assembly sealing structure of hub reduction axle

Technical Field

The utility model belongs to car axle subassembly field, concretely relates to wheel hub assembly seal structure of wheel limit speed reduction axle.

Background

In the wheel reduction axle of the current domestic automobile, a wheel reduction cavity is communicated with a hub assembly cavity and is lubricated by gear oil. This structure has the following disadvantages: the gear in the hub reduction gear is engaged to generate grinding, and the grinding enters a tapered roller of a hub bearing, so that the hub bearing is worn early, and the service life is reduced; the sealing performance of the oil seal on the inner side of the wheel hub to gear oil is poor, an oil baffle disc structure needs to be installed on the shaft head, an oil baffle cover structure needs to be added on the wheel hub, an oil discharge hole structure needs to be added on the wheel hub, the oil baffle cover structure is used for discharging leaked gear oil, and the material cost is increased.

Disclosure of Invention

The utility model discloses a solve in the current car wheel reduction axle because wheel reduction cavity and wheel hub assembly cavity intercommunication lead to in the wheel reduction gear the grinding that gear engagement produced to cause wheel hub bearing early wearing and tearing in the tapered roller of wheel hub bearing, reduce life, because wheel hub bearing adopts the gear oil lubrication structure to lead to the inboard oil blanket sealing performance of wheel hub poor, need install the oil baffle disc structure on the spindle nose, need increase the oil baffle cover structure on wheel hub, need increase the discharge that oil drain hole structure is used for seepage gear oil on wheel hub and lead to material cost increase scheduling problem, the wheel hub assembly seal structure of a wheel reduction axle is provided, promote wheel hub bearing life-span, promote wheel hub assembly sealing performance.

The utility model discloses an adopt following technical scheme to realize:

a hub assembly sealing structure of a hub reduction axle comprises a hub, an outer bearing and an inner bearing which are sleeved on a shaft neck of a shaft head are sequentially arranged in the hub from front to back, a spacer bush is sleeved on the shaft neck of the shaft head between the outer bearing and the inner bearing, the novel bearing is characterized in that a spline shaft at the front part of a shaft head is arranged in a spline hole of a gear ring support, the rear end face of the gear ring support is attached to the front end face of an inner ring of an outer bearing, a No. 1O-shaped ring is arranged between the gear ring support and the shaft head, an oil seal seat ring is sleeved on the shaft head, the front end face of an oil seal seat ring is attached to the rear end face of the inner ring of the inner bearing, the gear ring is sleeved on a shaft neck of the shaft head and the outer cylindrical face of the rear end of a hub, a threaded hole of a locking nut is screwed into the thread diameter of the front end of the shaft head and is screwed tightly, and the; an outer oil seal is arranged between the inner surface of the front end of the inner cavity of the hub and the gear ring support, and a sealing lip of the outer oil seal is attached to the shaft diameter of the gear ring support; the shaft diameter of the hub is arranged in a central hole of the hub reduction gear shell, an inner oil seal is arranged between the inner surface of the rear end of the inner cavity of the hub and the outer surface of the oil seal seat ring, and lubricating grease is injected into the inner cavity of the hub.

The further technical scheme is as follows:

two O-shaped rings, namely a No. 2O-shaped ring and a No. 3O-shaped ring, are arranged between the shaft neck of the hub and the hole wall of the central hole of the hub reduction gear shell at intervals.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model provides a pair of wheel hub assembly seal structure of wheel reduction axle uses in wheel reduction axle, through above-mentioned structure and adopt lubricated wheel hub of fat to replace lubricated wheel hub of oil, makes wheel reduction's inner chamber and wheel hub assembly's inner chamber keep apart. Compared with the original structure, the structure avoids the influence of gear oil impurities in the hub reduction gear on the hub bearing, and prolongs the service life of the hub bearing; the hub assembly adopts multiple sealing structures such as an inner oil seal, an outer oil seal, an O-shaped ring and the like, so that the oil leakage frequency of the hub assembly is reduced, and the sealing reliability is improved; and an auxiliary sealed oil baffle disc and an oil baffle cover structure are omitted, so that the cost is reduced.

Drawings

The invention will be further described with reference to the accompanying drawings:

fig. 1 is a schematic structural cross-sectional view of a wheel hub assembly sealing structure of a wheel hub reduction axle according to the present invention, which is applied to a wheel hub reduction axle assembly;

fig. 2 is a schematic structural cross-sectional view of a hub assembly sealing structure of a hub reduction axle according to the present invention;

in the figure: 1. the novel hub comprises a hub, 2 parts of a spacer bush, 3 parts of a tire bolt, 4.2 parts of an O-shaped ring, 5.3 parts of an O-shaped ring, 6 parts of a gear ring, 7 parts of an inner oil seal, 8 parts of an inner bearing, 9 parts of an outer bearing, 10 parts of an outer oil seal, 11 parts of a shaft head, 12 parts of an oil seal seat ring, 13 parts of a hub assembly, 14 parts of a hub reducer shell, 15 parts of a gear ring support, 16.1 parts of an O-shaped ring and 17 parts of a locking nut.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings:

the utility model provides a wheel hub assembly seal structure of wheel edge reduction axle, as shown in figure 1 and figure 2, wheel hub assembly 13 and wheel edge reducer shell 14, brake drum and rim pass through tire bolt 3 to be connected, wheel hub assembly 13 includes wheel hub 1, outer bearing 9 and inner bearing 8 which are sleeved on the axle journal of axle head 11 are arranged in wheel hub 1 from front to back in proper order, a spacer 2 is sleeved on the axle journal of axle head 11 between outer bearing 9 and inner bearing 8, the spline shaft in front of axle head 11 is arranged in the spline hole of gear ring support 15, the rear end face of gear ring support 15 is attached to the front end face of the inner ring of outer bearing 9, a No. 1O-shaped ring 16 is arranged between gear ring support 15 and axle head 11, oil seal seat ring 12 is sleeved on axle head 11, the front end face of oil seal seat ring 12 is attached to the rear end face of the inner ring of inner bearing 8, gear ring 6 is sleeved on the outer cylindrical face of the axle journal of, the threaded hole of the locking nut 17 is screwed into the thread diameter at the front end of the spindle nose 11 and is screwed, and the rear end face of the locking nut 17 compresses the No. 1O-shaped ring 16 and is attached to the front end face of the gear ring support 15; an outer oil seal 10 is arranged between the inner surface of the front end of the inner cavity of the hub 1 and the gear ring support 15, and the sealing lip of the outer oil seal 10 is attached to the shaft diameter of the gear ring support 15; the shaft diameter of the hub 1 is arranged in a central hole of a hub reduction gear shell 14, an inner oil seal 7 is arranged between the inner surface of the rear end of the inner cavity of the hub 1 and the outer surface of an oil seal seat ring 12, and lubricating grease is filled in the inner cavity of the hub 1.

As shown in fig. 2, two O-rings, i.e., No. 2O-ring 4 and No. 3O-ring 5, are provided at an interval between the journal of the hub 1 and the hole wall of the center hole of the hub reduction gear case 14.

Claims

1. A hub assembly sealing structure of a hub reduction axle comprises a hub assembly (13), a hub reduction shell (14), a brake drum and a rim which are connected through a tire bolt (3), wherein the hub assembly (13) comprises a hub (1), an outer bearing (9) and an inner bearing (8) which are sleeved on a shaft neck of a shaft head (11) are sequentially arranged in the hub (1) from front to back, a spacer sleeve (2) is arranged between the outer bearing (9) and the inner bearing (8) and sleeved on the shaft neck of the shaft head (11), the hub assembly sealing structure is characterized in that a spline hole of a gear ring support (15) is filled in a spline shaft at the front part of the shaft head (11), the rear end surface of the gear ring support (15) is attached to the front end surface of an inner ring of the outer bearing (9), a No. 1O-shaped ring (16) is arranged between the gear ring support (15) and the shaft head (11), an oil seal ring (12) is sleeved on the shaft head (11), the front end surface of the oil seal ring, the gear ring (6) is sleeved on the shaft neck of the shaft head (11) and the outer cylindrical surface of the rear end of the hub (1), a threaded hole of the locking nut (17) is screwed into the thread diameter of the front end of the shaft head (11) and is screwed, and the rear end surface of the locking nut (17) compresses the No. 1O-shaped ring (16) and is attached to the front end surface of the gear ring support (15); an outer oil seal (10) is arranged between the inner surface of the front end of the inner cavity of the hub (1) and the gear ring support (15), and a sealing lip of the outer oil seal (10) is attached to the shaft diameter of the gear ring support (15); the shaft diameter of the hub (1) is arranged in a center hole of a hub reduction gear shell (14), an inner oil seal (7) is arranged between the inner surface of the rear end of the inner cavity of the hub (1) and the outer surface of an oil seal seat ring (12), and lubricating grease is filled into the inner cavity of the hub (1).

2. The hub assembly seal structure of a hub reduction axle according to claim 1, wherein two O-rings, i.e., No. 2O-ring (4) and No. 3O-ring (5), are provided at a distance between the journal of the hub (1) and the bore wall of the center bore of the hub reduction case (14).