CN202381583U - Two-way backstop - Google Patents
Two-way backstop Download PDFInfo
- Publication number
- CN202381583U CN202381583U CN2011205612951U CN201120561295U CN202381583U CN 202381583 U CN202381583 U CN 202381583U CN 2011205612951 U CN2011205612951 U CN 2011205612951U CN 201120561295 U CN201120561295 U CN 201120561295U CN 202381583 U CN202381583 U CN 202381583U
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- Prior art keywords
- output shaft
- input shaft
- shaft
- shell
- friction sleeve
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Abstract
The utility model discloses a two-way backstop which aims at overcoming the defect that as an output shaft of the conventional two-way backstop generates large turning moment on a backstop key during reverse stop, the backstop key rotates along with the output shaft. The two-way backstop mainly comprises a shell, an input shaft and an output shaft from outside to inside, wherein bearings are respectively arranged between the input shaft and the shell and between the output shaft and the shell, a friction sleeve is arranged between the two bearings and is adhered to the inner wall of the shell, and an anti-rotating pin is arranged between the friction sleeve and the shell; bushes are respectively arranged between the friction sleeve and the two bearings; the input shaft and the output shaft are hollow, the half parts of the input shaft and the output shaft respectively extend outwards in the axial direction, the input shaft and the output shaft are in butt joint by virtue of the backstop key, and the butt joint part is right opposite to the friction sleeve; and the backstop key presses the spring to be positioned between the butt joint parts of the input shaft and the output shaft. The two-way backstop can effectively prevent the backstop key from rotating with the output shaft when the backstop key is stopped reversely.
Description
Technical field
The utility model relates to a kind of two-way non-return device.
Background technique
Two-way non-return device is the part commonly used on lathe or other machinery, and it is that moment of torsion is perhaps cut off in transmission between input shaft and output shaft that device mainly acts on.
Existing two-way non-return device set inside has the check key; When reverse locking, output shaft counterrotating under the load effect, the initial outer rim of plane of constraint at first with the check key contacts; The check key is formed very big running torque, make the check key along with output shaft rotates together.
In addition, output shaft generally adopts bulk heat treatment, and the hardness of itself and check key contacts face is lower, causes in the using process wearing and tearing very fast, and it is very fast to make the non-return device overall performance descend.
The model utility content
The utility model technical problem to be solved is that the output shaft that overcomes present two-way non-return device forms very big running torque to the check key and makes the deficiency that the check key rotates along with output shaft together when reverse locking.
In order to solve the problems of the technologies described above; The utility model provides a kind of two-way non-return device; Ecto-entad mainly comprises shell, input shaft and output shaft, respectively is provided with bearing between this input shaft, output shaft and this shell, is provided with friction sleeve between two bearings; This friction sleeve pastes with the inwall of this shell mutually, and stop pin is arranged between this friction sleeve and this shell; Between this friction sleeve and this two bearings, respectively be provided with a lining; This input shaft and output shaft are hollow shaft, respectively stretch out half the in the axial direction and pass through the check key to dock, and the docking site faces this friction sleeve; This check key pressing spring is between this input shaft and this output shaft docking site.
Preferably, this input shaft and this output shaft are hollow shaft, and this input shaft has interface towards the end of this output shaft one end, and this output shaft also has interface towards the end of this input shaft one end.
Preferably, this input shaft upwards is the circular arc less than half cycle towards the interface of the end of this output shaft one end in week.
Preferably, this output shaft upwards is the circular arc less than half cycle towards the interface of the end of this input shaft one end in week.
Preferably, this check key cross section is trapezoidal, and big Transverse plane is pressed on the interface of this input shaft, has cylindrical hole on the little Transverse plane.
Preferably, this spring is a conical coil spring, and its big end is installed in the cylindrical hole of this input shaft, and small end is pressed on the internal circular surfaces of this output shaft.
Compared with prior art; The embodiment of the utility model makes the stressed tangent plane of output shaft become two planes with several angle the present embodiment from a plane of the prior art, and the check key is along with output shaft rotates together in the time of can effectively preventing reverse locking.The embodiment of the utility model has improved the overall performance of non-return device, can prolong the working life of non-return device.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment's two-way non-return device.
Fig. 2 is the sectional view of the L-L direction of structural representation shown in Figure 1.
Embodiment
For the purpose, technological scheme and the advantage that make the utility model is clearer, hereinafter will combine accompanying drawing that the embodiment of the utility model is elaborated.Need to prove that under the situation of not conflicting, embodiment among the application and the characteristic among the embodiment be combination in any each other.
As depicted in figs. 1 and 2, the utility model embodiment's two-way non-return device ecto-entad mainly comprises shell 1, two bearings 2, input shaft 5 and output shafts 8.Be provided with this bearing 2 between input shaft 5 and the shell 1, also be provided with this bearing 2 between output shaft 8 and the shell 1.Be provided with friction sleeve 4 between two bearings 2, its inwall with shell 1 pastes mutually.Stop pin 9 is arranged between friction sleeve 4 and the shell 1 and (respectively has semicylindrical opening on friction sleeve 4 and the shell 1, in order to stop pin 9 to be installed), can effectively prevent to occur relatively rotating between friction sleeve 4 and the shell 1.Between friction sleeve 4 and two bearings 2, respectively be provided with a lining 3.
Check key 6 cross sections are trapezoidal, and big Transverse plane is pressed on the interface of input shaft 5, has cylindrical hole on its little Transverse plane.Among the embodiment of the utility model, spring 7 is a conical coil spring, and its big end is installed in input shaft 5 cylindrical holes, and small end is pressed on output shaft 8 internal circular surfaces.Input shaft 5 and output shaft 8 are in this cooperation, and the transmission section all is the smaller part circumference, and the middle check key 6 of installing is realized transmission and checks, and both are combined together and form approaching complete circumference.
After the utility model carried out integral material heat treatment to output shaft, also the surface of contact to itself and check key carried out diffusion zone, increased the hardness and the wear resistance of surface of contact, improved the non-return device overall performance, prolonged non-return device working life.
When static, check key 6 is being pressed under the thrust of spring 7 on friction sleeve 4 inwalls.
During the forward transmission, input shaft 5 rotation drives output shafts 8, and input shaft 5 can be that to turn clockwise also can be to be rotated counterclockwise.Input shaft 5 is a hollow shaft sleeve, and the end upwards is smaller part week circular arc in week.The tangent plane promotion check key 6 big faces of input shaft 5,6 rotations of check key, its facet promotes the tangent plane of output shaft 8, makes output shaft 8 rotate and promote the tangent plane of output shaft 8, makes output shaft 8 rotate.
During reverse transmission, the tangent plane of output shaft 8 promotes check key 6, and this moment, check key 6 was pressed under the effect of spring 7 on the inwall of friction sleeve 4, reaches the check effect owing to the arc surface of check key 6 and the wedge action of friction sleeve 4 internal surfaces simultaneously.
During check, because driving moment suddenly disappears in during the forward transmission, under the loading moment effect, the tangent plane of output shaft 8 reverses rapidly, contacts and promote check key 6 with check key 6.Spring 7 promotes check key 6 and makes its inwall that is adjacent to friction sleeve 4 simultaneously, facilitates check key 6 and friction sleeve 5 to form self-locking.
The embodiment of the utility model is become output shaft 8 into practical function outer rim B by drive surface and check key 6 point of contact from initial outer rim A, and this variation makes the stressed tangent plane of output shaft 8 become two planes with several angle the present embodiment from a plane of the prior art.As shown in the figure.8 pairs of check keys of output shaft 6 form small rotation moment, form simultaneously than high thrust check key 6 is pressed in the friction sleeve 5, reach reverse locking effect.
Though the mode of execution that the utility model disclosed as above, the mode of execution that described content just adopts for the ease of understanding the utility model is not in order to limit the utility model.Technician under any the utility model in the technical field; Under the prerequisite of spirit that does not break away from the utility model and disclosed and scope; Can do any modification and variation what implement in form and on the details; But the scope of patent protection of the utility model still must be as the criterion with the scope that appending claims was defined.
Claims (6)
1. two-way non-return device; It is characterized in that; Ecto-entad mainly comprises shell, input shaft and output shaft, respectively is provided with bearing between this input shaft, output shaft and this shell, is provided with friction sleeve between two bearings; This friction sleeve pastes with the inwall of this shell mutually, and stop pin is arranged between this friction sleeve and this shell; Between this friction sleeve and this two bearings, respectively be provided with a lining; This input shaft and output shaft are hollow shaft, respectively stretch out half the in the axial direction and pass through the check key to dock, and the docking site faces this friction sleeve; This check key pressing spring is between this input shaft and this output shaft docking site.
2. two-way non-return device according to claim 1 is characterized in that,
This input shaft and this output shaft are hollow shaft, and this input shaft has interface towards the end of this output shaft one end, and this output shaft also has interface towards the end of this input shaft one end.
3. two-way non-return device according to claim 1 is characterized in that,
This input shaft upwards is the circular arc less than half cycle towards the interface of the end of this output shaft one end in week.
4. two-way non-return device according to claim 3 is characterized in that,
This output shaft upwards is the circular arc less than half cycle towards the interface of the end of this input shaft one end in week.
5. two-way non-return device according to claim 1 is characterized in that,
This check key cross section is trapezoidal, and big Transverse plane is pressed on the interface of this input shaft, has cylindrical hole on the little Transverse plane.
6. two-way non-return device according to claim 1 is characterized in that,
This spring is a conical coil spring, and its big end is installed in the cylindrical hole of this input shaft, and small end is pressed on the internal circular surfaces of this output shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205612951U CN202381583U (en) | 2011-12-29 | 2011-12-29 | Two-way backstop |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205612951U CN202381583U (en) | 2011-12-29 | 2011-12-29 | Two-way backstop |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202381583U true CN202381583U (en) | 2012-08-15 |
Family
ID=46630088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205612951U Expired - Lifetime CN202381583U (en) | 2011-12-29 | 2011-12-29 | Two-way backstop |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202381583U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106286636A (en) * | 2016-11-08 | 2017-01-04 | 天津铁路信号有限责任公司 | A kind of electric point machine roller Bidirectional non-return device |
| CN107355491A (en) * | 2017-08-11 | 2017-11-17 | 河南清创自动化技术研究院有限公司 | Reverse transmission self-locking mechanism and its manufactured reductor |
-
2011
- 2011-12-29 CN CN2011205612951U patent/CN202381583U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106286636A (en) * | 2016-11-08 | 2017-01-04 | 天津铁路信号有限责任公司 | A kind of electric point machine roller Bidirectional non-return device |
| CN106286636B (en) * | 2016-11-08 | 2018-08-07 | 天津铁路信号有限责任公司 | A kind of electric point machine roller Bidirectional non-return device |
| CN107355491A (en) * | 2017-08-11 | 2017-11-17 | 河南清创自动化技术研究院有限公司 | Reverse transmission self-locking mechanism and its manufactured reductor |
| CN107355491B (en) * | 2017-08-11 | 2023-05-16 | 清研自动化技术(洛阳)有限公司 | Reverse transmission self-locking mechanism and speed reducer manufactured by same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee after: China Oilfield Services Limited Patentee after: China Offshore Oil Group Co., Ltd. Address before: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee before: China Oilfield Services Limited Patentee before: China National Offshore Oil Corporation |
|
| CP01 | Change in the name or title of a patent holder | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120815 |
|
| CX01 | Expiry of patent term |