CN2646486Y - Sealing structure of transmission shaft - Google Patents
Sealing structure of transmission shaft Download PDFInfo
- Publication number
- CN2646486Y CN2646486Y CN 03210245 CN03210245U CN2646486Y CN 2646486 Y CN2646486 Y CN 2646486Y CN 03210245 CN03210245 CN 03210245 CN 03210245 U CN03210245 U CN 03210245U CN 2646486 Y CN2646486 Y CN 2646486Y
- Authority
- CN
- China
- Prior art keywords
- transmission shaft
- oil sealing
- oil seal
- locking nut
- sealing
- 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.)
- Expired - Lifetime
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- Mounting Of Bearings Or Others (AREA)
- Sealing Devices (AREA)
Abstract
The utility model discloses a sealing structure of the transmission shaft, including a lock nut, an O ring, an oil seal and an oil seal seat. The lock nut and the oil seal seat is sleeved on the transmission shaft layer by layer. The oil seal seat is provided with the oil seal, and the O ring is arranged on the outer periphery of the oil seal seat. Those parts and a bearing and bearing seat form into an enclosed cavity. The main characteristics are that an external thread is also arranged on the lock nut and positioned in the enclosed cavity and sealed with the oil seal seat. When the transmission shaft is running, the external thread generates pumping, making the actuating medium going through the clearance between the lock nut and the oil seal seat and flowing to the space between the oil seal and the lock nut flow into the enclosed cavity along the thread groove, thereby improving the working conditions of the oil seal, reducing the leakage and increasing the sealing effects.
Description
Technical field
The utility model relates to a kind of sealing configuration of transmission shaft.
Background technique
The leakage of working medium in the transmission shaft works can cause the material waste, sometimes may befouling environment.And intrusion equipment such as the gas in the environment, water and dust can pollute working medium, influence quality of product or aggravation parts depreciation, shorten service life of a machine.Therefore for ensureing the reliability of transmission shaft works work, prevent the leakage of working medium and the intrusion of introduced contaminants, must adopt sealing configuration.Usually the sealability of transmission shaft often is to estimate an important indicator of mechanical product quality, and the selection of sealing material and sealing configuration will directly have influence on sealing effect.
The sealing configuration of existing transmission shaft comprises locking nut, round section joint ring, oil sealing and oil sealing base, described locking nut and oil sealing base successively are sleeved on the described transmission shaft, be provided with oil sealing between the two, described round section joint ring is arranged on the excircle of described oil sealing base; Above-mentioned parts and bearing, bearing support form the inner chamber of a sealing.Because friction and wear is the problem that certainly exists in the contact type motive sealing, described sealed member contacts with transmission shaft and produces relative movement, thereby produces friction, causes the wearing and tearing of heating and part surface, is easy to cause leakage.
Summary of the invention
To be solved in the utility model is the leakage problem of the sealing configuration existence of existing transmission shaft, and a kind of follow-on sealing configuration is provided, and is intended to improve sealability.Address the above problem and adopt technological scheme to be: the sealing configuration of transmission shaft, comprise locking nut, round section joint ring, oil sealing and oil sealing base, described locking nut and oil sealing base successively are sleeved on the described transmission shaft, be provided with oil sealing in the described oil sealing base, described round section joint ring is arranged on the excircle of described oil sealing base; Above-mentioned parts and bearing, bearing support form an enclosed cavity, it is characterized in that also being provided with outside thread on the described locking nut, and described outside thread is positioned at described enclosed cavity, and with described oil sealing base liquid sealing.
Sealing configuration of the present utility model, owing to axially fasten on the locking nut that bearing uses and have additional outside thread, and this outside thread is arranged in the described enclosed cavity, be that described seal oil envelope is moved to whole sealing configuration foremost, when transmission shaft rotates, make this outside thread produce pump-absorb action, order flows to closed chamber inside by the working medium that locking nut and oil sealing base gap flow between oil sealing and the locking nut along thread groove, improve the working condition of oil sealing, leak thereby reduce, improve sealing effect.
As further improvement of the utility model, the outside thread that is provided with on the described locking nut is the double end outside thread, with further raising sealing effect.
Described oil sealing can be set directly between described oil sealing base and the transmission shaft, and described like this locking nut is whole to be wrapped in the described enclosed cavity by described oil sealing base.
Described oil sealing also can be arranged between described oil sealing base and the locking nut, and described like this locking nut flushes with oil sealing base one end.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples.
Fig. 1 is the prior art constructions schematic representation.
Fig. 2 is the structural representation that the utility model locking nut is wrapped in the embodiment in the enclosed cavity.
Fig. 3 is the embodiment's that flushes with oil sealing base one end of the utility model locking nut a structural representation.
Embodiment
Figure 1 shows that the sealing configuration of existing transmission shaft, locking nut 2 is sleeved on the described transmission shaft 1, is set with oil sealing base 4 on its outer peripheral surface, is provided with oil sealing 3 in the described oil sealing base 4, and the excircle of described oil sealing base 4 is provided with " O " shape seal ring.Above-mentioned locking nut 2, oil sealing 3, oil sealing base 4 constitute an enclosed cavity 7 with bearing support 6, bearing 8.The defective front of sealing structure was described, was not repeated at this.
With reference to Fig. 2, the sealing configuration of transmission shaft of the present utility model is to improve on prior art, its improvements are also to be provided with outside thread 9 on the described locking nut 2, and described outside thread 9 is positioned at described enclosed cavity 7, and with described oil sealing base 4 liquid sealings.In the present embodiment, described oil sealing 3 is set directly between described oil sealing base 4 and the transmission shaft 1, and described locking nut 2 is whole to be wrapped in the described enclosed cavity 7 by described oil sealing base 4.
Fig. 3 is another mode of execution of the present utility model, be that with Fig. 2 mode of execution difference described locking nut 2 flushes with described oil sealing base 4 left ends, the excircle of described locking nut 2 left end portion is smooth surface, and described oil sealing 3 is arranged between described oil sealing base 4 and the locking nut 2.
This programme passes through 1000 hours reliability trial, does not find leakage of oil, proves that its sealing effect is good.
Claims (4)
1, a kind of sealing configuration of transmission shaft, comprise locking nut, round section joint ring, oil sealing and oil sealing base, described locking nut and oil sealing base successively are sleeved on the described transmission shaft, are provided with oil sealing in the described oil sealing base, and described round section joint ring is arranged on the excircle of described oil sealing base; Above-mentioned parts and bearing, bearing support form an enclosed cavity, it is characterized in that also being provided with outside thread on the described locking nut, and described outside thread is positioned at described enclosed cavity, and with described oil sealing base liquid sealing.
2, the sealing configuration of transmission shaft as claimed in claim 1 is characterized in that the outside thread that is provided with on the described locking nut is the double end outside thread.
3, the sealing configuration of transmission shaft as claimed in claim 1 or 2 is characterized in that described oil sealing is arranged between described oil sealing base and the transmission shaft.
4, the sealing configuration of transmission shaft as claimed in claim 1 or 2 is characterized in that described oil sealing is arranged between described oil sealing base and the locking nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03210245 CN2646486Y (en) | 2003-08-28 | 2003-08-28 | Sealing structure of transmission shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03210245 CN2646486Y (en) | 2003-08-28 | 2003-08-28 | Sealing structure of transmission shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2646486Y true CN2646486Y (en) | 2004-10-06 |
Family
ID=34289305
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03210245 Expired - Lifetime CN2646486Y (en) | 2003-08-28 | 2003-08-28 | Sealing structure of transmission shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2646486Y (en) |
-
2003
- 2003-08-28 CN CN 03210245 patent/CN2646486Y/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20130828 Granted publication date: 20041006 |