CN201228738Y - Double-arc roller overrunning clutch - Google Patents
Double-arc roller overrunning clutch Download PDFInfo
- Publication number
- CN201228738Y CN201228738Y CNU2008200902265U CN200820090226U CN201228738Y CN 201228738 Y CN201228738 Y CN 201228738Y CN U2008200902265 U CNU2008200902265 U CN U2008200902265U CN 200820090226 U CN200820090226 U CN 200820090226U CN 201228738 Y CN201228738 Y CN 201228738Y
- Authority
- CN
- China
- Prior art keywords
- arc
- double
- roller
- sprocket
- arc roller
- 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 - Fee Related
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Abstract
The utility model discloses a double-arc roller overrunning clutch comprising an outer ring, a sprocket, a double-arc roller, a sleeve and a spring, wherein a wedge-shaped space is formed between the outer ring and the sprocket, the double-arc roller is disposed in the wedge-shaped space, the spring is mounted between the lateral face of the double-arc roller and the sprocket, contact faces of the double-arc roller and the outer ring are arc surfaces, and the lower surface of the double-arc roller is composed of an arc surface and a convex plane which contact with the sprocket simultaneously. As the contact faces of the double-arc roller and the outer ring are arc surfaces and the lower surface of the double-arc roller is composed of the arc surface and the convex plane, the arc surface and the convex plane contact with the sprocket simultaneously. As maximum value of curvature radius of the double arc surface can be taken considerably, contact stress among the double-arc roller, the outer ring and the sprocket can be greatly decreased, thereby increasing the bearing capacity of the overrunning clutch. Additionally, the upper arc surface and the lower arc surface can be very small in distance, thereby reducing the distance between the outer ring and the sprocket, and further enabling a more compact structure.
Description
Technical field
The utility model relates to a kind of clutch, is a kind of pair of arc roller overrunning clutch specifically.
Background technique
At present, traditional roller-type overrunning clutch, the contact stress between its roller and outer shroud and the star-wheel is bigger, so star-wheel and roller contacting point are easy to wearing and tearing.And the distance between outer shroud and the star-wheel is bigger, makes total compact inadequately.
Summary of the invention
The purpose of this utility model is to overcome the deficiency that exists in the above-mentioned technology, and a kind of compact structure, two arc roller overrunning clutches reasonable in design, with low cost are provided, and can well overcome the deficiency of existing product.
In order to achieve the above object, the technical solution adopted in the utility model is: comprise by outer shroud, star-wheel, two arc roller, sleeve and spring, form a wedge shape space between outer shroud and the star-wheel, two arc rollers place wedge shape space, mounting spring between its side and the star-wheel, two arc rollers and outer shroud surface of contact are cambered surface, and its lower surface is made up of cambered surface and projection plane, and cambered surface contacts with star-wheel with the projection plane simultaneously.
The utility model has the advantages that:
Because two arc rollers and outer shroud surface of contact in the utility model are cambered surface, its lower surface is made up of cambered surface and projection plane, and cambered surface contacts with star-wheel with the projection plane simultaneously.Because the radius of curvature of two cambered surfaces can be got very big value, this has just reduced the contact stress of two arc rollers and outer shroud, star-wheel greatly, has improved the bearing capacity of free wheel device.Simultaneously, the distance of upper and lower two cambered surfaces can be very little, thereby reduce the distance between outer shroud and the star-wheel, makes more compact structure.
Description of drawings
Fig. 1 is the utility model structural representation;
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail.
As shown in Figure 1, the utility model the utility model is an a kind of pair of arc roller overrunning clutch, comprise by outer shroud 1, star-wheel 2, two arc roller 3, sleeve 4 and spring 5, form a wedge shape space between outer shroud 1 and the star-wheel 2, two arc rollers 3 place wedge shape space, mounting spring 5 between its side and the star-wheel 2, and two arc rollers 3 are cambered surface with outer shroud 1 surface of contact, its lower surface is made up of cambered surface and projection plane, and cambered surface contacts with star-wheel with the projection plane simultaneously.
Can realize that by above structure under the effect of spring 5, the upper and lower surface of two arc rollers 3 contacts with star-wheel 2 with outer shroud 1 respectively.Two arc rollers 3 and outer shroud 1 are total to tangent plane and the crossing sharp angle that forms of out star wheel working surface is called the angle of wedge.When outer shroud 1 counterclockwise during motion, two arc roller 3 oriented left movement trend, when α less than from the locking angle
(
Can be more than or equal to the friction angle of twice) time, the free wheel device self-locking, thus drive star-wheel 2 motions (can be used as output shaft).When outer shroud 1 moves clockwise, for surmounting operating mode.Spring 5 is to drive the effect that two arc rollers 3 provide initial frictional force for outer shroud 1.
The upper and lower contacting surface of two arc rollers 3 can design very greatly, so compare with traditional roller-type overrunning clutch, contact stress significantly reduces; Simultaneously, the distance of upper and lower two cambered surfaces can be very little, thereby reduce the distance between outer shroud 1 and the star-wheel 2, makes more compact structure.The effect on lower surface projection plane is to make to surmount the operating mode sensitivity.Since bigger from the locking angle, so reduced machining accuracy.
Claims (1)
1. two arc roller overrunning clutch, comprise by outer shroud (1), star-wheel (2), two arc roller (3), sleeve (4) and spring (5), form a wedge shape space between outer shroud (1) and the star-wheel (2), two arc rollers (3) place wedge shape space, mounting spring (5) between its side and the star-wheel (2), it is characterized in that: two arc rollers (3) are cambered surface with outer shroud (1) surface of contact, and its lower surface is made up of cambered surface and projection plane, and cambered surface contacts with star-wheel with the projection plane simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200902265U CN201228738Y (en) | 2008-06-17 | 2008-06-17 | Double-arc roller overrunning clutch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200902265U CN201228738Y (en) | 2008-06-17 | 2008-06-17 | Double-arc roller overrunning clutch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201228738Y true CN201228738Y (en) | 2009-04-29 |
Family
ID=40633689
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200902265U Expired - Fee Related CN201228738Y (en) | 2008-06-17 | 2008-06-17 | Double-arc roller overrunning clutch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201228738Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102128219A (en) * | 2010-12-16 | 2011-07-20 | 包头市蓝光齿轮有限公司 | Loading machine drum-type roller-type overrunning clutch |
| CN106545597A (en) * | 2016-12-21 | 2017-03-29 | 宁波市镇海捷登应用技术研究所 | A kind of freewheel clutch that can increase the service life |
-
2008
- 2008-06-17 CN CNU2008200902265U patent/CN201228738Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102128219A (en) * | 2010-12-16 | 2011-07-20 | 包头市蓝光齿轮有限公司 | Loading machine drum-type roller-type overrunning clutch |
| CN106545597A (en) * | 2016-12-21 | 2017-03-29 | 宁波市镇海捷登应用技术研究所 | A kind of freewheel clutch that can increase the service life |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090429 |