CN209781680U - Sealing structure for double oil seals on inner side of hub - Google Patents
Sealing structure for double oil seals on inner side of hub Download PDFInfo
- Publication number
- CN209781680U CN209781680U CN201920414192.9U CN201920414192U CN209781680U CN 209781680 U CN209781680 U CN 209781680U CN 201920414192 U CN201920414192 U CN 201920414192U CN 209781680 U CN209781680 U CN 209781680U
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- hub
- bearing
- wheel hub
- journal section
- shaft head
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Abstract
The utility model provides a two oil blanket seal structure of wheel hub inboard, wheel hub's central through hole is third-order aperture structure, the spindle nose is the step shaft structure, the bearing sets up in wheel hub first-order round hole, there is an O-shaped ring suit between the terminal surface of the big journal section of bearing inner ring and spindle nose on the little journal section of spindle nose and lie in the concave fillet of transition between little journal section of journal and the big journal section of spindle nose terminal surface, be provided with the inner oil blanket between wheel hub second-order round hole and the inner ring of bearing, be provided with the outer oil blanket between big journal section of spindle nose and the wheel hub third-order round hole; this structure is effectual prevents the early oil leak of wheel hub oil blanket, prevents the ablation of wheel hub bearing, prevents to lead to the brake performance to descend the scheduling problem emergence because of the greasy dirt pollution, promotes the sealing reliability, promotes the assembly fault-tolerant ability.
Description
Technical Field
The utility model belongs to car axle field, concretely relates to inboard two oil blanket seal structure of wheel hub.
Background
in the current automobile axle in China, the inner side of a hub is mostly sealed by a single oil seal, and because of the influence of factors such as assembly precision, sealing performance of the oil seal, operation environment and the like, failure such as early oil seal damage, oil leakage and the like often occurs. Resulting in the burning-out of the hub bearing, the reduction of the braking performance and other serious consequences.
disclosure of Invention
the utility model discloses a solve in the current car axle because wheel hub inboard adopts single oil blanket structure to lead to the sealing reliability to descend, the early wearing and tearing of oil blanket, oil blanket oil leak, the burning of wheel hub bearing, the braking performance scheduling problem that descends, provide an inboard two oil blanket seal structure of wheel hub to promote sealing reliability, reduce cost of maintenance.
In order to solve the technical problem, the utility model discloses an adopt following technical scheme to realize:
A double-oil-seal sealing structure on the inner side of a hub comprises the hub, the hub is connected with a shaft head, and the double-oil-seal sealing structure is characterized in that the shaft head is a stepped shaft, the front part of the shaft head is a large shaft head journal section, the rear part of the shaft head is a small shaft head journal section, a concave round angle is adopted for transition between the rear end surface of the large shaft head journal section and the small shaft head journal section, a central hole of the hub is of a three-order aperture structure, a hub three-order round hole, a hub second-order round hole and a hub first-order round hole are sequentially arranged from front to back, the inner diameter of the hub three-order round hole is larger than that of the hub second-order round hole, the inner diameter of the hub second-order; the outer surface of the outer ring of the bearing is attached to the inner wall of a first-order circular hole of a hub of the hub, the inner ring of the bearing is sleeved on the small journal section of the shaft head, the front end face of the inner ring of the bearing is provided with a circular groove on the front end face of the inner ring of the bearing, and the circular groove on the front end face of the bearing is matched with the O-shaped ring; the outer surface of the inner oil seal is attached to the inner wall of the second-order circular hole of the hub, and the sealing lip of the inner oil seal is attached to the outer surface of the inner ring of the bearing; the outer surface of the outer oil seal is attached to the inner wall of a three-step round hole of a hub of the hub, and the sealing lip of the outer oil seal is attached to the outer surface of the large journal section of the shaft head.
Compared with the prior art, the beneficial effects of the utility model are that:
The utility model provides an inboard two oil blanket seal structure of wheel hub, it is sealed through adopting two oil blankets in wheel hub's central through-hole, the effectual early oil leak that prevents the wheel hub oil blanket prevents the ablation of wheel hub bearing, prevents to lead to the brake performance to descend the scheduling problem to take place because of the greasy dirt pollution, promotes the sealing reliability, promotes the assembly fault-tolerant ability.
drawings
The invention will be further described with reference to the accompanying drawings:
Fig. 1 is a schematic structural cross-sectional view of a double-oil-seal sealing structure applied to a rear axle assembly on the inner side of a hub according to the present invention;
Fig. 2 is a partial enlarged view at a position I in fig. 1, namely, a structural schematic view of a double-oil-seal sealing structure at the inner side of a hub according to the present invention;
Fig. 3 is a longitudinal sectional view of a shaft head in the double oil seal sealing structure at the inner side of the hub according to the present invention;
in the figure: 1. the novel bearing comprises a hub, 2. a bearing, 3. an O-shaped ring, 4. an inner oil seal, 5. an outer oil seal, 6. a shaft head, 7. a small shaft neck section of the shaft head, 8. a concave round angle, 9. a rear end face and 10. a large shaft neck section of the shaft head.
Detailed Description
the present invention will be described in detail with reference to the accompanying drawings:
The utility model provides an inboard two oil blanket seal structure of wheel hub is applied to in the shown rear axle assembly of figure 1, as shown in figure 2, including wheel hub 1, wheel hub 1 is connected with spindle nose 6, as shown in figure 3, spindle nose 6 is a step shaft, and 6 front portions of spindle nose are big journal section 10, and 6 rear portions of spindle nose are spindle nose little journal section 7, adopt concave fillet 8 transition between the rear end face 9 of spindle nose big journal section 10 and the spindle nose little journal section 7.
As shown in fig. 2, the central hole of the hub 1 is of a three-step aperture structure, and sequentially comprises a hub three-step round hole, a hub two-step round hole and a hub one-step round hole from front to back, wherein the inner diameter of the hub three-step round hole is larger than that of the hub two-step round hole, the inner diameter of the hub two-step round hole is larger than that of the hub one-step round hole, and the O-ring 3 is sleeved on the small shaft neck section 7 of the shaft head and is attached to; the outer surface of the outer ring of the bearing 2 is attached to the inner wall of a first-order circular hole of the hub 1, the inner ring of the bearing 2 is sleeved on the small shaft head journal section 7, the front end face of the inner ring of the bearing 2 is provided with a circular groove on the front end face of the inner ring of the bearing, and the circular groove on the front end face of the inner ring of the bearing is matched with an O-shaped ring; the outer surface of the inner oil seal 4 is attached to the inner wall of a second-order round hole of the hub 1, and the sealing lip of the inner oil seal 4 is attached to the outer surface of the inner ring of the bearing 2; the outer surface of the outer oil seal 5 is attached to the inner wall of a three-step round hole in the hub of the hub 1, and the sealing lip of the outer oil seal 5 is attached to the outer surface of the large shaft head journal section 10.
Claims (1)
1. a double-oil seal sealing structure on the inner side of a hub comprises the hub (1), the hub (1) is connected with a shaft head (6), the novel hub is characterized in that the shaft head (6) is a stepped shaft, a large shaft head journal section (10) is arranged at the front part of the shaft head (6), a small shaft head journal section (7) is arranged at the rear part of the shaft head (6), a concave fillet (8) is adopted for transition between the rear end surface (9) of the large shaft head journal section (10) and the small shaft head journal section (7), a center hole of the hub (1) is of a three-step aperture structure, a hub three-step circular hole, a hub two-step circular hole and a hub one-step circular hole are sequentially arranged from front to back, the inner diameter of the hub three-step circular hole is larger than that of the hub two-step circular hole, the inner diameter of the hub two-step circular hole is larger than that of the hub one-step circular hole, the O-shaped ring (3) is sleeved on the small; the outer surface of the outer ring of the bearing (2) is attached to the inner wall of a first-order round hole of the hub (1), the inner ring of the bearing (2) is sleeved on the small journal section (7) of the shaft head, the front end face of the inner ring of the bearing (2) is provided with a circular groove on the front end face of the inner ring of the bearing, and the circular groove on the front end face of the bearing is matched with an O-shaped ring; the outer surface of the inner oil seal (4) is attached to the inner wall of a second-order round hole of the hub (1), and the sealing lip of the inner oil seal (4) is attached to the outer surface of the inner ring of the bearing (2); the outer surface of the outer oil seal (5) is attached to the inner wall of a three-step round hole of the hub (1), and the sealing lip of the outer oil seal (5) is attached to the outer surface of the large shaft head journal section (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920414192.9U CN209781680U (en) | 2019-03-29 | 2019-03-29 | Sealing structure for double oil seals on inner side of hub |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920414192.9U CN209781680U (en) | 2019-03-29 | 2019-03-29 | Sealing structure for double oil seals on inner side of hub |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209781680U true CN209781680U (en) | 2019-12-13 |
Family
ID=68800327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920414192.9U Active CN209781680U (en) | 2019-03-29 | 2019-03-29 | Sealing structure for double oil seals on inner side of hub |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209781680U (en) |
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2019
- 2019-03-29 CN CN201920414192.9U patent/CN209781680U/en active Active
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