CN105465227A - Screw drive type overrun clutch - Google Patents
Screw drive type overrun clutch Download PDFInfo
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- CN105465227A CN105465227A CN201510565768.8A CN201510565768A CN105465227A CN 105465227 A CN105465227 A CN 105465227A CN 201510565768 A CN201510565768 A CN 201510565768A CN 105465227 A CN105465227 A CN 105465227A
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- ring
- support roller
- wheel device
- pushing out
- free wheel
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Abstract
The invention discloses a screw drive type overrun clutch. The screw drive type overrun clutch comprises an outer ring, an inner ring and rolling bodies, wherein meshing spaces used for being meshed or separated through the rolling bodies are formed between the outer ring and the inner ring, the inner ring is arranged on a drive part in a sleeving mode, and a spiral cam used for being matched with the drive part is arranged on the inner circle of the inner ring. According to the screw drive type overrun clutch, the spiral cam is arranged on the inner ring, the inner ring is arranged on the drive part, and therefore use of an end cam is reduced, and the reaction to resistance is sensitive due to the good flexibility of the spiral cam; the overrun clutch has the multi-cam drive possibility, is suitable for mechanical self-adapting transmissions, is simple and compact in structure and is suitable for being used by hubs and can reduce the axial dimensions of the transmissions, and the speed change process is good in flexibility and high in drive accuracy.
Description
Technical field
The present invention relates to a kind of for Motor Vehicle and mechanically operated clutching device, particularly a kind of free wheel device.
Background technique
Free wheel device is the basic components occurred along with the development of power product, and it is the vitals for transmission of power and separation function between prime mover and working machine or between machine intimate driving shaft and driven shaft.Mainly utilize the velocity variations of driving and driven part or the conversion of sense of rotation, there is the device of clutch function voluntarily.In practice, most for utilizing the engagement of tooth, the engagement of ratchet-ratchet or rolling element, the wedge action unidirectional delivery motion of voussoir or the clutch of moment of torsion.
Existing free wheel device generally comprises inner ring, rolling element and outer ring.Inner ring is generally direct to carry out coordinating transmission with transmission shaft, or is arranged at supporting axle and passes through facing drive; And in adaptive automatic mechanical transmission, free wheel device inner ring then generally adopts end cam to form transmission, realize speed change to ensure the automatic axial displacement of adaptive structure; In order to ensure the flexibility of speed change, it is secondary that multiple cam drive generally need be set, whole speed changer axial length will be caused longer, take up room larger; And speed-change process flexibility is unsatisfactory.。
Therefore, need to improve existing free wheel device, namely free wheel device itself forms the possibility with many cam drives, simply compact for Adaptive Mechanical speed changer structure, reduce the axial dimension of speed changer, be applicable to the uses such as wheel hub, speed-change process has good flexibility and higher transmission accuracy.
Summary of the invention
In view of this, the invention provides a kind of power screw formula free wheel device, namely free wheel device itself forms the possibility with many cam drives, simply compact for Adaptive Mechanical speed changer structure, reduce the axial dimension of speed changer, be applicable to the uses such as wheel hub, speed-change process has good flexibility and higher transmission accuracy.
Power screw formula free wheel device of the present invention, comprise outer ring, inner ring and rolling element, form the engagement space being used for being engaged by rolling element or being separated between described outer ring and inner ring, described inner ring is coated at a driving component and the inner circle of inner ring is provided with spiral cam for coordinating with driving component.
Further, also comprise Support roller assembly, described supporting roller assembly at least comprises and is parallel to free wheel device axis and support roll group spaced with rolling element, described support roll group at least comprises along free wheel device radial side by side and the outer support roller be arranged in parallel and inner support roller, described outer support roller cylindrical all contacts with adjacent rolling element cylindrical with inner support roller cylindrical, and described outer support roller and inner support roller are to arrange in the movable mode of the circumferencial direction of free wheel device;
Further, described driving component is a driving sleeve, and described driving sleeve is coordinated by spiral cam auxiliary driving with inner ring, and described driving sleeve end is provided with driving end face cam;
Further, described supporting roller assembly also comprises supporting roller support, and described outer support roller and inner support roller are being supported between outer ring inner circle and inner ring cylindrical by supporting roller support along the slip of free wheel device circumferencial direction and the mode around own axis;
Further, described supporting roller support comprises the pushing out ring I and pushing out ring II that arrange corresponding to support roll two ends, the axial end of described pushing out ring I and the axial end of pushing out ring II are respectively equipped with the circular groove along pushing out ring I and pushing out ring II circumferencial direction for penetrating for outer support roller and inner support roller two ends, and described outer support roller and inner support roller two ends are slidably matched with corresponding circular groove;
Further, also comprise the baffle ring I be positioned at outside pushing out ring I and the baffle ring II be positioned at outside pushing out ring II, in described baffle ring I and baffle ring II is all formed, be placed on the heavy stand structure of outer ring;
Further, described engagement space is formed by between the wedge slot of inner ring Excircle machining and the inwall of the ring-shaped depression radial outside of outer ring;
Further, described baffle ring I and baffle ring II is equipped with for the oil-through hole by lubricant oil, and the circular groove bottom land of described pushing out ring I and the circular groove bottom land of pushing out ring II are equipped with axial hole;
Further, the distribution of the axial hole of the circular groove bottom land of described pushing out ring I and the circular groove bottom land of pushing out ring II is corresponding with outer support roller and rolling element;
Further, the diameter of described outer support roller is greater than the diameter of inner support roller, and the two ends of described outer support roller form the necking down structure of the circular groove for penetrating pushing out ring I and pushing out ring II.
Beneficial effect of the present invention: power screw formula free wheel device of the present invention, free wheel device inner ring adopts the structure of spiral cam, and is arranged on driving component, reduces the use of end cam, and spiral cam has good flexibility, comparatively sensitive to resistance response; Free wheel device itself is made namely to form the possibility with many cam drives, simply compact for Adaptive Mechanical speed changer structure, reduce the axial dimension of speed changer, be applicable to the uses such as wheel hub, speed-change process has good flexibility and higher transmission accuracy.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described.
Fig. 1 is structural representation of the present invention;
Fig. 2 is that Fig. 1 is radially to sectional view.
Embodiment
Fig. 1 is structural representation of the present invention, Fig. 2 is that Fig. 1 is radially to sectional view, as shown in the figure: the power screw formula free wheel device of the present embodiment, comprise outer ring 1, inner ring 2 and rolling element 3, the engagement space being used for engaging by rolling element 3 or being separated is formed between described outer ring 1 and inner ring 2, described inner ring 2 is coated at a driving component 7 and the inner circle of inner ring 2 is provided with spiral cam 2a for coordinating with driving component 7, spiral cam refers to and is positioned at inner circle and the cam with lead angle, stable transmission gapless; Driving component can be transmission shaft or axle sleeve, needs to select according to difference.
In the present embodiment, also comprise Support roller assembly, described supporting roller assembly at least comprises and is parallel to free wheel device axis and support roll group spaced with rolling element, described support roll group at least comprises along free wheel device radial side by side and the outer support roller be arranged in parallel and inner support roller, described outer support roller cylindrical all contacts with adjacent rolling element cylindrical with inner support roller cylindrical, and described outer support roller and inner support roller are to arrange in the movable mode of the circumferencial direction of free wheel device; Outer support roller refers to the support roll of radial outside, inner support roller is then be set up in parallel with outer support roller and be positioned at the back-up roll inside outer support roller along the radial direction of free wheel device, owing to all contacting with rolling element, thus the diameter of outer support roller is greater than the diameter of inner support roller, difference range is then different from the size of free wheel device, does not repeat them here; Support roll group can the mounting structure of prior art along the movable set-up mode of circumferencial direction of free wheel device, does not repeat them here; Adopt the help roll structure independent of outer ring and inner ring, and adopt follow-up-type structure, for keeping the spacing between rolling element, cancel elastic element and the position limit socket of prior art, avoid directly processing position limit socket on outer ring or inner ring, simplify course of working, increase work efficiency, cut down finished cost, ensure processing and assembly precision, increase the service life and ensure transmission effect, and associated components is easily changed after damaging, and reduces maintenance and use cost; Owing to adopting help roll structure, do not adopt independent elastic element, the axial length of prolongation free wheel device that can be longer in theory and rolling element, increase length of action, thus increase the bearing capacity of free wheel device, and reduce, compared with the free wheel device radial dimension under high bearing capacity, to extend the working life of free wheel device; Simultaneously, directly contact with rolling element owing to adopting the dual-gripper roller be disposed radially, the unbalanced problem that the applying of the point cantact to the roller pretightening force not only eliminating prior art produces, also rolling element is formed to the radial constraint of balance, ensure under the prerequisite of longer axial dimension while the spacing balance of rolling element, avoid causing larger wearing and tearing surmounting in formation, and avoid mechanical failure, ensure working life, running precision and safety in utilization.
In the present embodiment, described driving component 7 is a driving sleeve, and described driving sleeve is coordinated by spiral cam auxiliary driving with inner ring 2, and described driving sleeve end is provided with driving end face cam 7b; As shown in the figure, driving sleeve has spiral cam 7a, coordinates form spiral prominence wheel set with the spiral cam 2a of inner ring 2, for reducing friction, being provided with ball, reducing the wastage in spiral prominence wheel set; End cam 7b is used for and other transmission part couple drive, realizes the drive mechanism of many cams.
In the present embodiment, described supporting roller assembly also comprises supporting roller support, and described outer support roller 5 and inner support roller 4 are being supported between outer ring 1 inner circle and inner ring 2 cylindrical by supporting roller support along the slip of free wheel device circumferencial direction and the mode around own axis; This structure ensures rotation or the free sliding degree of support roll, thus ensures the trackability of support roll further, makes to form rolling friction when free wheel device runs between rolling element and support roll, reduces power consumption, and makes the stability of free wheel device better.
In the present embodiment, described supporting roller support comprises the pushing out ring I10 and pushing out ring II6 that arrange corresponding to support roll two ends, the axial end of described pushing out ring I10 and the axial end of pushing out ring II6 are respectively equipped with the circular groove along pushing out ring I10 and pushing out ring II6 circumferencial direction for penetrating for outer support roller 5 and inner support roller 4 two ends, (in Fig. 2, indicate the circular groove 10a on pushing out ring I10, circular groove 6a on pushing out ring II6 and the circular groove 10a similar on pushing out ring I10 are also all inside), described outer support roller 5 and inner support roller 4 two ends are slidably matched with corresponding circular groove, namely one end of outer support roller 5 and one end correspondence of inner support roller 4 penetrate the circular groove 10a on pushing out ring I10, the other end penetrates the circular groove 6a on pushing out ring II6, adopt the mounting structure of circular groove, structure is simple, and assembling easily, makes the designs simplification of free wheel device further, reduces costs.Described outer support roller and inner support roller two ends are slidably matched with corresponding circular groove;
In the present embodiment, also comprise the baffle ring I11 be positioned at outside pushing out ring I10 and the baffle ring II12 be positioned at outside pushing out ring II6, be placed on the heavy stand structure of outer ring in described baffle ring I11 and baffle ring II12 is all formed, form the stable support to outer ring, ensure the stable operation of free wheel device itself; As shown in the figure, baffle ring I11 and baffle ring II12 respectively by the roller bearings of correspondence in driving component 7 cylindrical, as shown in the figure, baffle ring I11 is installed on driving component 7 by rolling bearing I9 and baffle ring II12 by rolling bearing II8, make to form stable relative movement between free wheel device inner ring and outer ring, reduce the generation of friction and bite.
In the present embodiment, described engagement space is formed by between the wedge slot of inner ring 2 Excircle machining and the inwall of the ring-shaped depression radial outside of outer ring 1; Simplified processing process, improves work efficiency, and cuts down finished cost.
In the present embodiment, described baffle ring I11 and baffle ring II12 is equipped with for the oil-through hole by lubricant oil, and as shown in the figure, baffle ring I is provided with oil-through hole 11a, and baffle ring II is provided with oil-through hole 12a; The circular groove 10a bottom land of described pushing out ring I10 and the circular groove 6a bottom land of pushing out ring II6 are equipped with axial hole, and as shown in the figure, the circular groove 10a bottom land of pushing out ring I10 is provided with axial hole 10b, and the circular groove 6a bottom land of pushing out ring II6 is provided with axial hole 6b; Said structure makes the axial two ends of free wheel device be provided with the oily structure of open mistake, can be introduced and removal of lubricant, together form grease channel by oil-through hole, realizes lubrication and cleaning preferably, thus ensures the running of free wheel device.
In the present embodiment, the distribution of the axial hole of the circular groove 10a bottom land of described pushing out ring I10 and the circular groove 6a bottom land of pushing out ring II6 is corresponding with outer support roller 5 and rolling element 3; Comparatively directly can provide lubrication preferably.
In the present embodiment, the diameter of described outer support roller 5 is greater than the diameter of inner support roller 4, to ensure the radial constraint good to rolling element 3; The two ends of described outer support roller form the necking down structure of the circular groove for penetrating pushing out ring I10 and pushing out ring II6; Adopt necking down structure can reduce the radial dimension of pushing out ring I10 and pushing out ring II6 while ensureing the larger radial dimension of external support roller, thus ensure the overall compactness of free wheel device; In the present embodiment, rolling element is roller.
What finally illustrate is, above embodiment is only in order to illustrate technological scheme of the present invention and unrestricted, although with reference to preferred embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to technological scheme of the present invention or equivalent replacement, and not departing from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (10)
1. a power screw formula free wheel device, comprise outer ring, inner ring and rolling element, form the engagement space being used for being engaged by rolling element or being separated between described outer ring and inner ring, it is characterized in that: described inner ring is coated at a driving component and the inner circle of inner ring is provided with spiral cam for coordinating with driving component.
2. power screw formula free wheel device according to claim 1, it is characterized in that: also comprise Support roller assembly, described supporting roller assembly at least comprises and is parallel to free wheel device axis and support roll group spaced with rolling element, described support roll group at least comprises along free wheel device radial side by side and the outer support roller be arranged in parallel and inner support roller, described outer support roller cylindrical all contacts with adjacent rolling element cylindrical with inner support roller cylindrical, and described outer support roller and inner support roller are to arrange in the movable mode of the circumferencial direction of free wheel device.
3. power screw formula free wheel device according to claim 1, it is characterized in that: described driving component is a driving sleeve, and described driving sleeve is coordinated by spiral cam auxiliary driving with inner ring, described driving sleeve end is provided with driving end face cam.
4. power screw formula free wheel device according to claim 2, it is characterized in that: described supporting roller assembly also comprises supporting roller support, described outer support roller and inner support roller are can be supported between outer ring inner circle and inner ring cylindrical along the slip of free wheel device circumferencial direction and the mode around own axis by supporting roller support.
5. power screw formula free wheel device according to claim 4, it is characterized in that: described supporting roller support comprises the pushing out ring I and pushing out ring II that arrange corresponding to support roll two ends, the axial end of described pushing out ring I and the axial end of pushing out ring II are respectively equipped with the circular groove along pushing out ring I and pushing out ring II circumferencial direction for penetrating for outer support roller and inner support roller two ends, and described outer support roller and inner support roller two ends are slidably matched with corresponding circular groove.
6. power screw formula free wheel device according to claim 5, is characterized in that: also comprise the baffle ring I be positioned at outside pushing out ring I and the baffle ring II be positioned at outside pushing out ring II, be placed on the heavy stand structure of outer ring in described baffle ring I and baffle ring II is all formed.
7. power screw formula free wheel device according to claim 6, is characterized in that: described engagement space is formed by between the wedge slot of inner ring Excircle machining and the inwall of the ring-shaped depression radial outside of outer ring.
8. power screw formula free wheel device according to claim 3, is characterized in that: described baffle ring I and baffle ring II is equipped with for the oil-through hole by lubricant oil, the circular groove bottom land of described pushing out ring I and the circular groove bottom land of pushing out ring II are equipped with axial hole.
9. power screw formula free wheel device according to claim 8, is characterized in that: the distribution of the axial hole of the circular groove bottom land of described pushing out ring I and the circular groove bottom land of pushing out ring II is corresponding with outer support roller and rolling element.
10. power screw formula free wheel device according to claim 5, is characterized in that: the diameter of described outer support roller is greater than the diameter of inner support roller, and the two ends of described outer support roller form the necking down structure of the circular groove for penetrating pushing out ring I and pushing out ring II.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510565768.8A CN105465227A (en) | 2015-09-08 | 2015-09-08 | Screw drive type overrun clutch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510565768.8A CN105465227A (en) | 2015-09-08 | 2015-09-08 | Screw drive type overrun clutch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105465227A true CN105465227A (en) | 2016-04-06 |
Family
ID=55603255
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510565768.8A Pending CN105465227A (en) | 2015-09-08 | 2015-09-08 | Screw drive type overrun clutch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105465227A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB422189A (en) * | 1932-06-17 | 1934-12-31 | Bendix Aviat Corp | Improvements in transmission mechanism |
| CN102720818A (en) * | 2012-06-18 | 2012-10-10 | 西南大学 | Mechanical, intelligent, adaptive, two-speed and multi-cam automatic transmission |
| CN102748449A (en) * | 2012-07-02 | 2012-10-24 | 西南大学 | Planetary intelligent self-adaptive two-gear multi-cam automatic speed change driver |
| CN103307140A (en) * | 2013-05-31 | 2013-09-18 | 西南大学 | Floating auxiliary roller type overrun clutch |
-
2015
- 2015-09-08 CN CN201510565768.8A patent/CN105465227A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB422189A (en) * | 1932-06-17 | 1934-12-31 | Bendix Aviat Corp | Improvements in transmission mechanism |
| CN102720818A (en) * | 2012-06-18 | 2012-10-10 | 西南大学 | Mechanical, intelligent, adaptive, two-speed and multi-cam automatic transmission |
| CN102748449A (en) * | 2012-07-02 | 2012-10-24 | 西南大学 | Planetary intelligent self-adaptive two-gear multi-cam automatic speed change driver |
| CN103307140A (en) * | 2013-05-31 | 2013-09-18 | 西南大学 | Floating auxiliary roller type overrun clutch |
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Application publication date: 20160406 |