CN223498623U - Gearbox sealing structure - Google Patents
Gearbox sealing structureInfo
- Publication number
- CN223498623U CN223498623U CN202520083015.2U CN202520083015U CN223498623U CN 223498623 U CN223498623 U CN 223498623U CN 202520083015 U CN202520083015 U CN 202520083015U CN 223498623 U CN223498623 U CN 223498623U
- Authority
- CN
- China
- Prior art keywords
- bearing
- sealing ring
- outer ring
- rubber sealing
- driving sprocket
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- General Details Of Gearings (AREA)
Abstract
A gearbox sealing structure belongs to the technical field of gearboxes. The novel gear transmission mechanism comprises a pump shell, a rubber sealing ring, a bearing bush, a driving sprocket and a stamped outer ring needle bearing, wherein the bearing bush, the stamped outer ring needle bearing and the driving sprocket are sequentially assembled on the pump shell, and the rubber sealing ring is arranged between the driving sprocket and the bearing bush and is positioned outside the stamped outer ring needle bearing. The utility model combines the existing single rubber sealing ring and steel sealing ring stamping outer ring needle roller bearing, and is changed into the rubber sealing ring stamping outer ring needle roller bearing, so that the gasket is omitted, the number of parts is small, the assembly process is simple, the structural rigidity is improved, the friction is reduced, the service life of the parts is prolonged, the design difficulty of the matching relationship is small, the design can be completed without later test verification, the design and selection period is short, and the trial and error cost is low.
Description
Technical Field
The utility model belongs to the technical field of gearboxes, and particularly relates to a gearbox sealing structure.
Background
There is a direct relationship between the gearbox seal and the oil pressure. The integrity of the sealing element directly influences the oil pressure stability in the gearbox, so that the normal operation of the gearbox is influenced.
The main function of the gearbox seal is to prevent lubricating oil leakage and ensure stable internal pressure of the gearbox. Aging, damage or improper installation of the seals can result in leakage of lubrication oil from the transmission, thereby causing a drop in oil pressure. Specifically, the seals of the gearbox include both static seals, which mainly involve seals in the pressure and non-pressure areas, and dynamic seals, which include seals in the rotating and reciprocating members.
When the oil pressure of the transmission is too low, possible causes include insufficient oil amount in the oil pan, clogging of the oil filter with foreign substances, problems in the tightness of the oil suction pipe, and serious wear of the transmission pump. These problems all lead to a drop in oil pressure, which in turn affects the proper operation of the gearbox.
The existing sealing structure is mainly of a single rubber sealing ring, gaskets are required to be installed on two sides during assembly, assembly procedures are complex, or a stamping outer ring needle roller bearing with a steel sealing ring is adopted, the structure is simple to assemble and operate, but the steel sealing ring is in small clearance fit with the outer ring and the matched shaft, the outer ring of the bearing is in interference fit with the bearing hole seat, and the inner diameter of the bearing is contracted after press fitting, so that the design difficulty of the matching relation of the steel sealing ring is high, whether the matching relation of the steel sealing ring meets the oil pressure control requirement in a gearbox or not can not be verified from the design stage at present, and the whole design verification period is long and the cost is high only through the reverse pushing of a complete machine test.
Disclosure of utility model
The utility model aims to solve the problems of high number of parts, complex assembly process, poor structural rigidity, high difficulty in designing the matching relation, long whole design verification period, high cost and the like in the conventional gearbox sealing structure, and further provides a gearbox sealing structure.
The technical scheme adopted by the utility model is as follows:
The gearbox sealing structure comprises a pump shell, a rubber sealing ring, a bearing bush, a driving sprocket and a stamped outer ring needle bearing, wherein the bearing bush, the stamped outer ring needle bearing and the driving sprocket are sequentially assembled on the pump shell, and the rubber sealing ring is arranged between the driving sprocket and the bearing bush and is positioned outside the stamped outer ring needle bearing.
Compared with the prior art, the utility model has the following beneficial effects:
The utility model combines the existing single rubber sealing ring and steel sealing ring stamping outer ring needle roller bearing, and is changed into the rubber sealing ring stamping outer ring needle roller bearing, so that the gasket is omitted, the number of parts is small, the assembly process is simple, the structural rigidity is improved, the friction is reduced, the service life of the parts is prolonged, the design difficulty of the matching relationship is small, the design can be completed without later test verification, the design and selection period is short, and the trial and error cost is low.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
The novel high-speed gear pump comprises a pump shell 1, a rubber sealing ring 2, a bearing bush 3, a driving sprocket 4 and a stamped outer ring needle roller bearing 5.
Detailed Description
For a better understanding of the objects, structures and functions of the present utility model, reference should be made to the following detailed description of the utility model with reference to the accompanying drawings.
As shown in fig. 1, the utility model provides a gearbox sealing structure, which comprises a pump shell 1, a rubber sealing ring 2, a bearing bush 3, a driving sprocket 4 and a drawn cup needle bearing 5, wherein the bearing bush 3, the drawn cup needle bearing 5 and the driving sprocket 4 are sequentially assembled on the pump shell 1, and the rubber sealing ring 2 is arranged between the driving sprocket 4 and the bearing bush 3 and is positioned outside the drawn cup needle bearing 5.
The inner circumferential surface of the driving sprocket 4 is provided with a step structure capable of accommodating the rubber sealing ring 2 and the drawn cup needle roller bearing 5.
The length of the bearing bush 3 is longer than the sum of the lengths of the rubber seal ring 2 and the drawn cup needle bearing 5.
The matching relation of the needle roller bearing 5 of the stamping outer ring is designed according to the boundary condition and the interference fit relation of the hand piece, and the design selection mark table of the rubber sealing ring 2 is searchable, so that the matching relation design difficulty is low.
It will be understood that the utility model has been described in terms of several embodiments, and that various changes and equivalents may be made to these features and embodiments by those skilled in the art without departing from the spirit and scope of the utility model. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the utility model without departing from the essential scope thereof. Therefore, it is intended that the utility model not be limited to the particular embodiment disclosed, but that the utility model will include all embodiments falling within the scope of the appended claims.
Claims (3)
1. A gearbox sealing structure is characterized by comprising a pump shell (1), a rubber sealing ring (2), a bearing bushing (3), a driving sprocket (4) and a drawn cup needle bearing (5), wherein the bearing bushing (3), the drawn cup needle bearing (5) and the driving sprocket (4) are sequentially assembled on the pump shell (1), and the rubber sealing ring (2) is arranged between the driving sprocket (4) and the bearing bushing (3) and is positioned outside the drawn cup needle bearing (5).
2. The gearbox sealing structure according to claim 1, wherein the inner circumferential surface of the driving sprocket (4) is provided with a step structure capable of accommodating the rubber sealing ring (2) and the drawn cup needle roller bearing (5).
3. A transmission sealing arrangement according to claim 1, characterized in that the length of the bearing bush (3) is longer than the sum of the lengths of the rubber sealing ring (2) and the drawn cup needle bearing (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202520083015.2U CN223498623U (en) | 2025-01-14 | 2025-01-14 | Gearbox sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202520083015.2U CN223498623U (en) | 2025-01-14 | 2025-01-14 | Gearbox sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN223498623U true CN223498623U (en) | 2025-10-31 |
Family
ID=97484826
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202520083015.2U Active CN223498623U (en) | 2025-01-14 | 2025-01-14 | Gearbox sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN223498623U (en) |
-
2025
- 2025-01-14 CN CN202520083015.2U patent/CN223498623U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |