CN201209639Y - Overrunning clutch - Google Patents
Overrunning clutch Download PDFInfo
- Publication number
- CN201209639Y CN201209639Y CNU2008200343938U CN200820034393U CN201209639Y CN 201209639 Y CN201209639 Y CN 201209639Y CN U2008200343938 U CNU2008200343938 U CN U2008200343938U CN 200820034393 U CN200820034393 U CN 200820034393U CN 201209639 Y CN201209639 Y CN 201209639Y
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- spring
- crossbeam
- sheet
- angle
- straight flange
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Abstract
The utility model relates to an overrunning clutch, in particular to an overrunning clutch with roller pins as the middle part, which comprises a retainer, a plurality of roller pins and a plurality of spring leaves. A first annular end edge and a second annular end edge at both ends of the fenestra on the retainer are respectively provided with a triangular protrusion used for positioning the spring leaves; both ends of the crossbeam of the retainer are provided with spring leaf positioning notches; the connection ends of both side surfaces of the crossbeam with the inner surface of the crossbeam are provided with spring leaf positioning conical surfaces; each spring leaf is composed of a supporting part and a clamping part which are connected integrally; the supporting part is a supporting piece with two ends which are bent inwards; the tail ends of two folded edges of the supporting piece are also bent inwards; the folding angles of the tail ends of the folded edges support the roller pins to suspend; the clamping part is composed of two clamping pieces; the upper ends of the clamping pieces are connected with the upper ends of the straight edges of the supporting piece; the lower ends of the clamping pieces are bent inwards; and the clamping pieces of the spring leaves are clamped in the spring leaf positioning notches of the crossbeam. The utility model solves the technical problems that the bearing capacity of the spring of the current overrunning clutch is not ideal and the spring has the hidden trouble of shifting and falling in a high rotating speed.
Description
Technical field
The utility model relates to the free wheel device that a kind of free wheel device, particularly middleware are needle roller.
Background technique
Free wheel device is to utilize the speed of related movement of driving and driven part to change or clutch that the conversion of gyratory directions can engage automatically or throw off; It is the base components in the electromechanical integration mechanical transmission, its major function is to prevent reverse, accurately location, transmitting torque or cut-out torque, thereby being also referred to as non-return device or unilateral bearing, it is widely used in lathe, package packing machine, printing machinery, light industry and machinery, textile manufacturing machine, petrochemical industry machinery, cement machinery, metallurgical machinery, Transport Machinery, speed reducer etc.The free wheel device kind is a lot, commonly used have a pawl type free wheel device, needle-type free wheel device and Wedge type over running clutch etc., wherein the structure of needle-type free wheel device is generally and comprises inner ring, the outer ring, needle roller and spring, needle roller relies on the elastic force of spring that free wheel device is remained on the ready state of work, and the spring in the needle-type free wheel device, structural type is also a lot, a kind of " two needle roller one-way brake bearing " disclosed as Chinese patent CN2206861Y, spring in its disclosed pair of needle roller one-way brake bearing is the elliptic spring sheet, place it in the groove in the needle roller hole on the needle roller support, be used for compressing needle roller, the manufacturing of this structure needle roller support is difficulty comparatively, and, under the rotating speed condition with higher, exist spring sheet to come off displacement and the hidden danger that lost efficacy because spring sheet just is placed in the tongue in needle roller hole of needle roller support; Chinese patent CN2252910Y discloses a kind of " the unidirectional stop combination bearing of sealed type ", and used spring is a S shape flat spring in the unidirectional stop combination bearing of its disclosed sealed type, and is same, and this structure also exists retainer to make the deficiency of difficulty.For this reason, the flat spring that people have developed the bending of a kind of two ends is used for free wheel device, the length of the straight flange of this flat spring is greater than the length of cages for needle crossbeam, the hole is located by connecting in the middle part of the flat spring, on the crossbeam of retainer, positioning protrusion is set, cooperate with the hole that is located by connecting of flat spring flat spring is fixed on the crossbeam on the retainer, because the length of the straight flange of flat spring is greater than the length of crossbeam, therefore flat spring is installed in its straight flange embowment of back on the retainer, this structure has realized that flat spring is connected with the reliable of retainer, but, the bending load that this flat spring can bear is not high, when the moment of torsion that transmits when free wheel device is big, can cause free wheel device to break down because of the flat spring fracture.At this problem, U. S. Patent 6170626 discloses a kind of free wheel device, its spring structure is that front end is an arc-shaped spring piece, in order to support needle roller, its rear end is an elastic clip, is used for snak link on the crossbeam of retainer, this spring structure can improve the bearing capacity of spring to a certain extent, but its elastic clip that adopts the rear end on the crossbeam of retainer, when rotating speed is higher, exists the hidden danger that looses from the crossbeam of retainer because of the action of centrifugal force elastic clip with snak link.The technology that the end of arc-shaped spring piece adopts stamping-out to be shaped, and terminal end face becomes wedge angle to contact with supported rolling element behind bending forming, in use, easily cause the concentrated wear on needle roller surface and produce noise, also very easily wearing and tearing of the end of arc-shaped spring piece simultaneously, the elastic force that causes being supported in needle roller is not enough and the function of forfeiture free wheel device.
The model utility content
The technical problems to be solved in the utility model is: the spring capacity that solves existing overrun is paid no attention to spring when thinking of high rotating speed and is had the come off technical problem of hidden danger of displacement.
The technological scheme that its technical problem that solves the utility model adopts is: a kind of free wheel device, have retainer, a plurality of needle roller and a plurality of spring sheet, retainer comprises along the axial separated first and second annular end limits of common shaft and connects the crossbeam on two annular end limits, form the fenestra that keeps needle roller between annular end limit and the crossbeam, the crossbeam two ends are provided with the spring positioning seam, and the bi-side of crossbeam are being provided with the spring positioning conical surface with crossbeam internal surface connecting end; On the first and second annular end limits at the two ends of fenestra a triangular hill that is used for spring positioning is arranged respectively, spring sheet can successfully be inserted in the retainer, and the location is more stable, retainer intensity also has raising simultaneously; Described spring sheet is made up of supporting part that fuses and retained part, supporting part is the support plate of inward at both ends bending, support plate has straight flange and two flangings, the end of two flangings also bends inwards, the terminal bending angle of flanging place supports needle roller and suspends, retained part is two holding sheets, and the holding sheet upper end links to each other with the straight flange upper end of support plate, the holding sheet lower end bends inwards; The holding sheet of spring sheet is clipped in the spring positioning stop portion of crossbeam.
Spring sheet is packed into from the inner radius of retainer, and fit with the excircle configuration of the inner ring of free wheel device, be limited between inner ring and the retainer, like this, spring sheet can be because of being subjected to frequent impact or under action of centrifugal force and depart from its correct working position in when work.The end of support plate two flangings bends inwards, adopting the terminal bending angle of flanging place to support needle roller suspends, thereby reduce the contact wear of spring sheet and needle roller, when in the spring sheet working procedure, being subjected to needle roller maximum compressing power, its bending distal portion just contacts with the straight flange of the support plate of spring sheet, how the spring sheet of this moment has been equivalent to two elastic support points, has prevented that spring sheet is over-stressed, thereby makes spring sheet have predetermined elastic force and stressed more stable when contact.
The bending angle β of intersubjective angle α of the straight flange of free state lower support sheet and holding sheet and holding sheet lower end is all less than the spring positioning conical surface of cooperation place crossbeam and the angle γ of crossbeam internal surface, thereby makes the holding sheet of spring sheet be clamped in the spring positioning stop portion of crossbeam reliably.
The intersubjective angle α of the straight flange of free state lower support sheet and holding sheet is 73～77 °, the bending angle β of holding sheet lower end is 73～77 °, the spring positioning conical surface of crossbeam and the angle γ of crossbeam internal surface are 78～82 °, and the bending angle β of the straight flange of free state lower support sheet and intersubjective angle α of holding sheet and holding sheet lower end is littler 4～6 ° than the angle γ of the spring positioning conical surface of cooperation place crossbeam and crossbeam internal surface.Draw by repetition test, in this angular range, the elastic force appropriateness of the holding sheet of spring sheet can be clamped in spring sheet on the crossbeam of retainer reliably, can not cause the holding sheet of spring sheet to occur the fatigue failure phenomenon in advance again because of elastic force is excessive.
The straight flange of the support plate of free state lower spring sheet and the angle δ between flanging are 30～40 °, and the terminal bending angle λ of flanging is 100～120 °.Draw through test, in this angular range, the support plate of spring sheet will form desirable elastic force angle.
The straight flange of the support plate of free state lower spring sheet and the angle δ between flanging are 33～35 °, and the straight flange of the support plate of stressed compressive state lower spring sheet and the angle δ between flanging are 17～19 °, and the terminal bending angle λ of flanging is 108～112 °.Draw by repetition test, will form an optimal elastic force angle at this angular range inner spring sheet.
For further improving the fatigue life of spring sheet, the material of spring sheet is 0Cr18Ni9.
The beneficial effects of the utility model are, free wheel device of the present utility model, its spring sheet is packed into from the inner radius of retainer, and fit with the excircle configuration of the inner ring of free wheel device, be limited between inner ring and the retainer, like this, spring sheet can be because of being subjected to frequent impact or under action of centrifugal force and depart from its correct working position in when work; The end bending of the support plate of spring sheet, adopting the terminal bending angle of flanging place to support needle roller suspends, reduce the contact wear of spring sheet and that needle roller, when in the spring sheet working procedure, being subjected to needle roller maximum compressing power, its bending distal portion just contacts with the straight flange of the support plate of spring sheet, how the spring sheet of this moment has been equivalent to two elastic support points, has prevented that spring sheet is over-stressed, thereby makes spring sheet have predetermined elastic force and stressed more stable when contact; The material selection 0Cr18Ni9 of spring sheet, and carry out suitable typing and handle, make spring sheet have higher fatigue life.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the A-A broken section enlarged view of Fig. 1.
The structural representation of the spring sheet in Fig. 3 the utility model.
Fig. 4 is that the B of Fig. 3 is to view.
Fig. 5 is the structural representation of the retainer in the utility model.
Fig. 6 is the C-C sectional view of Fig. 5.
Fig. 7 is the D-D sectional view of Fig. 6.
1. retainers among the figure, 11. crossbeams, 111. spring positioning seams, 112. the spring positioning conical surface, 12. annular end limits, 121. triangular hills, 13. fenestra, 2. needle roller, 3. spring sheet, 31. support plate, 311. straight flanges, 312. flangings, 32. holding sheet, 4. inner ring, 5. driven pulley, 6. sealed picture, 7. outer ring.
Embodiment
The most preferred embodiment of the free wheel device of the present utility model shown in Fig. 1～7, have retainer 1, a plurality of needle roller 2 and a plurality of spring sheet 3, retainer 1 comprises along the axial separated first and second annular end limits 12 of common shaft and connects the crossbeam 11 on two annular end limits, form the fenestra 13 that keeps needle roller 2 between annular end limit 12 and the crossbeam 11, crossbeam 11 two ends are provided with spring positioning seam 111, and the bi-side of crossbeam 11 are being provided with the spring positioning conical surface 112 with crossbeam 11 internal surface connecting ends; A triangular hill 121 that is used for spring sheet 3 location is respectively arranged on the first and second annular end limits 12 at the two ends of fenestra 13, and the triangular hill 121 on the annular end limit 12 also has the effect of the intensity that improves retainer 1; Described spring sheet 3 is made up of supporting part that fuses and retained part, supporting part is the support plate 31 of inward at both ends bending, support plate 31 has straight flange 311 and two flangings 312, the end of two flangings 312 also bends inwards, flanging 312 terminal bending angle places support needle roller 2 and suspend, retained part is two holding sheets 32, and holding sheet 32 upper ends link to each other with straight flange 311 upper ends of support plate 31, holding sheet 32 lower ends bend inwards; One inclined-plane of triangular hill 121 cooperates with the flanging 312 of the support plate 31 of spring sheet 3, make spring sheet 3 can successfully be inserted in the retainer 1, and locate more stable, the holding sheet 32 of spring sheet 3 is clipped in spring positioning seam 111 places of crossbeam 11, and the bending angle β of the lower end of the straight flange 311 of free state lower support sheet 31 and the intersubjective angle α of holding sheet 32 and holding sheet 32 is all less than the spring positioning conical surface 112 of cooperation place crossbeam 11 and the angle γ of the internal surface of crossbeam 11.The straight flange 311 of free state lower support sheet 31 is 75 ° with the intersubjective angle α of holding sheet 32, the bending angle β of holding sheet 32 lower ends is 75 °, the spring positioning conical surface 112 of crossbeam 11 is 80 ° with the angle γ of the internal surface of crossbeam 11, the angle δ that the straight flange 311 of the support plate 31 of free state lower spring sheet 3 and flanging are 312 is 33.5 °, the angle δ that the straight flange 311 of the support plate 31 of stressed compressive state lower spring sheet 3 and flanging are 312 is 18 °, and the terminal bending angle λ of flanging 312 is 110 °.
Claims (6)
1. free wheel device, have retainer (1), a plurality of needle roller (2) and a plurality of spring sheet (3), retainer comprises along the axial separated first and second annular end limits (12) of common shaft and connects the crossbeam (11) on two annular end limits (12), form the fenestra (13) that keeps needle roller (2) between annular end limit (12) and the crossbeam (11), it is characterized in that: described crossbeam (11) two ends are provided with spring positioning seam (111), and the bi-side of crossbeam (11) are provided with the spring positioning conical surface (112) at the internal surface connecting end with crossbeam (11); On the first and second annular end limits (12) at the two ends of fenestra (13), a triangular hill (121) that is used for spring positioning is arranged respectively, described spring sheet (3) is made up of supporting part that fuses and retained part, supporting part is the support plate (31) of inward at both ends bending, support plate (31) has straight flange (311) and two flangings (312), the end of two flangings (312) also bends inwards, the terminal bending angle of flanging (312) place supports needle roller (2) and suspends, retained part is two holding sheets (32), and holding sheet (32) upper end links to each other with straight flange (311) upper end of support plate (31), holding sheet (32) lower end bends inwards; The holding sheet (32) of spring sheet (3) is clipped in the spring positioning seam (111) of crossbeam (11) and locates.
2. free wheel device according to claim 1 is characterized in that: the bending angle (β) of the straight flange (311) of free state lower support sheet (31) and the intersubjective angle (α) of holding sheet (32) and holding sheet (32) lower end is all less than the spring positioning conical surface (112) of cooperation place crossbeam (11) and the angle (γ) of crossbeam (11) internal surface.
3. free wheel device according to claim 2, it is characterized in that: the straight flange (311) of free state lower support sheet (31) is 73～77 ° with the intersubjective angle (α) of holding sheet (32), the bending angle (β) of the lower end of holding sheet (32) is 73～77 °, the spring positioning conical surface (112) of crossbeam (11) is 78～82 ° with the angle (γ) of the internal surface of crossbeam (11), and the straight flange (311) of free state lower support sheet (31) is littler 4～6 ° with the angle (γ) of the internal surface of crossbeam (11) than the spring positioning conical surface (112) of cooperation place crossbeam (11) with the bending angle (β) of the lower end of the intersubjective angle (α) of holding sheet (32) and holding sheet (32).
4. free wheel device according to claim 1, it is characterized in that: the straight flange (311) of the support plate (31) of free state lower spring sheet (3) and the angle (δ) between flanging (312) are 30～40 °, and the terminal bending angle (λ) of flanging (312) is 100～120 °.
5. free wheel device according to claim 1, it is characterized in that: the straight flange (311) of the support plate (31) of free state lower spring sheet (3) and the angle (δ) between flanging (312) are 33～35 °, the straight flange (311) of the support plate (31) of stressed compressive state lower spring sheet (3) and the angle (δ) between flanging (312) are 17～19 °, and the terminal bending angle (λ) of flanging (312) is 108～112 °.
6. free wheel device according to claim 1 is characterized in that: the material of described spring sheet (3) is 0Cr18Ni9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200343938U CN201209639Y (en) | 2008-04-23 | 2008-04-23 | Overrunning clutch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200343938U CN201209639Y (en) | 2008-04-23 | 2008-04-23 | Overrunning clutch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201209639Y true CN201209639Y (en) | 2009-03-18 |
Family
ID=40480375
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200343938U Expired - Fee Related CN201209639Y (en) | 2008-04-23 | 2008-04-23 | Overrunning clutch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201209639Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103047317A (en) * | 2012-12-31 | 2013-04-17 | 西南大学 | Internal star wheel overrun clutch |
-
2008
- 2008-04-23 CN CNU2008200343938U patent/CN201209639Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103047317A (en) * | 2012-12-31 | 2013-04-17 | 西南大学 | Internal star wheel overrun clutch |
| CN103047317B (en) * | 2012-12-31 | 2015-10-28 | 西南大学 | Internal star wheel overrun clutch |
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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: 20090318 Termination date: 20140423 |