CN102619901A - Nut screw pre-tightening overrun clutch - Google Patents
Nut screw pre-tightening overrun clutch Download PDFInfo
- Publication number
- CN102619901A CN102619901A CN2012101274067A CN201210127406A CN102619901A CN 102619901 A CN102619901 A CN 102619901A CN 2012101274067 A CN2012101274067 A CN 2012101274067A CN 201210127406 A CN201210127406 A CN 201210127406A CN 102619901 A CN102619901 A CN 102619901A
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- China
- Prior art keywords
- nut
- screw
- transmission shaft
- drive wheel
- screw rod
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- 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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- Transmission Devices (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Abstract
The invention relates to a novel nut screw pre-tightening overrun clutch. A locking mechanism composed of a group of nuts and screws is used for replacing a wedge block or roller on a common overrun clutch to realize locking combination or decoupling and release connection between a driving shaft and a driving wheel of the clutch. The novel nut screw pre-tightening overrun clutch disclosed by the invention can be flexibly combined, is resistant to overload and has an overload protection function; and the novel nut screw pre-tightening overrun clutch disclosed by the invention has a simple mechanism and is easy to produce.
Description
Technical field
The present invention relates to a kind of novel mechanical transmission controllable mechanism, especially can control separating and combining of transmission shaft and drive wheel, realize the transmission and the interruption of power, belong to machine industry.
Background technique
The existing free wheel device that uses with roller type He ?the piece formula exist force bearing point Shao ﹑ ?the piece multi-processing require Gao ﹑ flexiblely not combine and anti-overload ability a little less than wait some defectives.
Summary of the invention
Problem to the existing technology free wheel device exists the invention provides a kind of novel free wheel device, and the technological scheme that the present invention adopts is: driving wheel tube is contained on the transmission shaft, and both can only radially rotate each other and can not move axially.Be equipped with the locking tripping-gear that nut-screw is formed with transmission shaft and drive wheel are coaxial, it is fixed or nut is fixed that this mechanism is divided into screw rod.
Screw rod is fixed to be configured with: the cored screw suit that has outer pitch thread is fixed on the transmission shaft (also can make an integral body with axle); On the nut driving screw rod; And in the large diameter of the outer diametric plane suit drive wheel of nut, to being processed with keyway and being equipped with key, be provided with springs between key and keyway at nut external diameter over glaze; Nut is through elastic force key and the friction of drive wheel large diameter; When drive wheel plus thread swivel nut also rotation together, positive spin nut is just locked drive wheel and transmission shaft each other, and nut has just unclamped tight lock during the left-hand thread rotation.
Nut is fixed to be configured with: the drive wheel large diameter is provided with internal threaded nut, and the cored screw that has outer pitch thread is sleeved on the transmission shaft, and screw rod is screwed in the nut; Axially be processed with keyway and be equipped with key at the screw rod aperture surface; Be provided with springs between key and keyway, screw rod is through elastic force key and transmission shaft friction, when transmission shaft plus thread swivel nut also rotation together; Positive spin nut is just locked drive wheel and transmission shaft each other, and nut has just unclamped tight lock during the left-hand thread rotation.
The invention has the beneficial effects as follows: transmission shaft for initiatively the time or drive wheel for initiatively the time; Nut or screw rod under friction strength drives, screw the Contact Transmission axle or drive wheel just is in the pretension state at this moment; Between wheel or axle and nut or the screw rod a certain amount of friction of skidding can be arranged; When two kinds of frictions just add big nut or screw rod locking strength, until the tight fully lock of axle and wheel.When driving force has moment overload and during greater than coupling mechanism force, transmission shaft and transmission shaft can a certain amount ofly skid.Therefore the present invention can flexiblely combine when transmission shaft combines with drive wheel, and overload-resistant, and overload protection function is arranged, and mechanism simply is easy to produce simultaneously.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
Fig. 1 is the structure cutaway view of first embodiment of the invention (screw rod is fixed)
Fig. 2 is the assembling schematic representation of first embodiment of the invention (screw rod is fixed)
Fig. 3 is the structure cutaway view of second embodiment of the invention (nut is fixed)
Fig. 4 is the assembling schematic representation of second embodiment of the invention (nut is fixed)
Among the figure: transmission shaft (1), drive wheel (2), nut (3), screw rod (4), positioning ring (5a ﹑ 5b ﹑ 5c), key (6), springs (7).
Embodiment 1
In Fig. 1, drive wheel (2) is sleeved on the transmission shaft (1), drive wheel (2) both sides be provided with positioning ring (5a ﹑ 5b) wherein (5a) for fixed, transmission shaft (1) and drive wheel (2) can only radially rotate each other and can not move axially like this.Have cored screw (4) suit of outer pitch thread and be fixed on transmission shaft (1) and go up (also can make an integral body) with axle; Be screwed into nut (3) fully on the screw rod (4); Nut (3) front-end face is near the side end face of drive wheel (2) and leave suitable distance; Ear end face is dislocated to prevent nut (3) by the location of the positioning ring (5c) on drive wheel (2) large diameter, and the outer diametric plane of nut (3) is sleeved in the large diameter of drive wheel (2).At nut (3) external diameter over glaze to being processed with keyway and being equipped with key (6); Be provided with springs (7) between key (6) and keyway; Nut (3) is exerted pressure and drive wheel (2) large diameter friction to key bar (6) through springs (7); Also rotation together of nut (3) when drive wheel (2) plus thread rotates, just drive wheel (2) and transmission shaft (1) locking each other, nut (3) has just unclamped tight lock to positive spin nut (3) during the left-hand thread rotation.
In Fig. 3; Drive wheel (2) is sleeved on the big step external diameter of transmission shaft (1); Drive wheel (2) both sides be provided with positioning ring (5a ﹑ 5b) wherein (5a) for fixed, transmission shaft (1) and drive wheel (2) can only radially rotate each other and can not move axially like this.At drive wheel (2) large diameter suit and be fixed with internal threaded nut (3); The cored screw (4) that has outer pitch thread is sleeved on the transmission shaft (1); And screw rod (4) is screwed into nut (3) lining fully, and screw rod (4) front-end face is near the big step side end face of transmission shaft (1) and leave suitable distance, and ear end face is dislocated to prevent screw rod (4) by the location of the positioning ring (5c) on the transmission shaft (1); Axially be processed with keyway and be equipped with key (6) at screw rod (4) aperture surface; Be provided with springs (7) between key (6) and keyway, screw rod (4) is exerted pressure and transmission shaft (1) friction to key (6) through springs (7), also rotation together of screw rod (4) when transmission shaft (1) plus thread rotates; Positive spin nut is just locked drive wheel and transmission shaft each other, and nut has just unclamped tight lock during the left-hand thread rotation.
Claims (6)
1. nut-screw prefastening free wheel device; It comprises that drive wheel (2) is sleeved on the transmission shaft (1); It is characterized in that: one group of locking tripping-gear of being made up of nut (3) and screw rod (4) is set with transmission shaft (1) and drive wheel (2) are coaxial; Nut, screw rod wherein one fixing, through plus thread, the left-hand thread rotation that is provided with fixed block, tightly lock drive wheel (2) and transmission shaft (1) each other or unclamp.
2. according to claims 1 described nut-screw prefastening free wheel device, it is characterized in that: nut and screw flight are standard and nonstandard screw thread, and thread turns comprises the number of turns that does not reach whole circle.
3. according to claims 1 described nut-screw prefastening free wheel device, it is characterized in that: transmission shaft (1) is solid shaft and hollow shaft.
4. according to claims 1 described nut-screw prefastening free wheel device; It is characterized in that: nut (3) or screw rod (4) are smooth surface or roughened surface with the abrasive end face of transmission shaft (1) or drive wheel (2), and end surface shape is plane, the conical surface or toothed surfaces.
5. according to claims 1 described nut-screw prefastening free wheel device; It is characterized in that: the inner ring over glaze of the outer ring face of nut (3) or screw rod (4) is to being processed with keyway; Key (6) is installed in the keyway, sheet type spring (7) is housed between key and the keyway.
6. according to claims 1 and 5 described nut-screw prefastening free wheel devicees; It is characterized in that: nut (3) is sleeved in the big inner ring of drive wheel (2) or screw rod (4) is sleeved on the transmission shaft (1), and the elastic force key on nut (3) or the screw rod (4) forms frictional force to drive wheel (2) or transmission shaft (1).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101274067A CN102619901A (en) | 2012-04-27 | 2012-04-27 | Nut screw pre-tightening overrun clutch |
| CN 201310056115 CN103375507A (en) | 2012-04-27 | 2013-02-22 | Nut and screw pre-tensioning overrun clutch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101274067A CN102619901A (en) | 2012-04-27 | 2012-04-27 | Nut screw pre-tightening overrun clutch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102619901A true CN102619901A (en) | 2012-08-01 |
Family
ID=46560032
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101274067A Pending CN102619901A (en) | 2012-04-27 | 2012-04-27 | Nut screw pre-tightening overrun clutch |
| CN 201310056115 Pending CN103375507A (en) | 2012-04-27 | 2013-02-22 | Nut and screw pre-tensioning overrun clutch |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201310056115 Pending CN103375507A (en) | 2012-04-27 | 2013-02-22 | Nut and screw pre-tensioning overrun clutch |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN102619901A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103277425A (en) * | 2013-06-25 | 2013-09-04 | 四川大学 | Double-screw overrunning clutch |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104179835A (en) * | 2014-09-09 | 2014-12-03 | 四川大学 | Overrun clutch |
| CN106276676A (en) * | 2015-06-02 | 2017-01-04 | 王俊财 | Telescopic mast |
-
2012
- 2012-04-27 CN CN2012101274067A patent/CN102619901A/en active Pending
-
2013
- 2013-02-22 CN CN 201310056115 patent/CN103375507A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103277425A (en) * | 2013-06-25 | 2013-09-04 | 四川大学 | Double-screw overrunning clutch |
| CN103277425B (en) * | 2013-06-25 | 2015-09-09 | 四川大学 | Double helix free wheel device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103375507A (en) | 2013-10-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120801 |