CN102537128B - Overrunning clutch with outer ring and flexible cantilevers - Google Patents
Overrunning clutch with outer ring and flexible cantilevers Download PDFInfo
- Publication number
- CN102537128B CN102537128B CN 201210009289 CN201210009289A CN102537128B CN 102537128 B CN102537128 B CN 102537128B CN 201210009289 CN201210009289 CN 201210009289 CN 201210009289 A CN201210009289 A CN 201210009289A CN 102537128 B CN102537128 B CN 102537128B
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- submissive
- cantilever
- curved
- straight line
- outer ring
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Abstract
An overrunning clutch with an outer ring and flexible cantilevers is characterized by consisting of an outer ring (1) and an inner ring (2). The outer circle of the inner ring (2) is smooth, a plurality of grooves (6) identical in shape are uniformly distributed on the inner side of the outer ring (1), curved flexible cantilevers (4) in the same number with the grooves (6) are machined between two grooves, each of the curved flexible cantilevers (4) is provided with an inward projection (3), the root of the outer side of the curved flexible cantilever (4) is a small flexible joint (8), and a large flexible joint (7) is arranged between the small flexible joint (8) and the projection (5). By the principle of the flexible cantilevers and the flexible joints, the overrunning clutch consists of two parts only, overcomes defects that the conventional overrunning clutch has parts in large quantity and not easy to be minimized or maintained, and accordingly has wide actual application prospect.
Description
Technical field
The present invention relates to a kind of free wheel device, belong to mechanical field.
Background technique
Free wheel device is used for unidirectional delivery motion or power, and structure is complicated usually, need to be made of many parts.The present invention has utilized the principle of submissive joint and submissive mechanical arm, has designed the free wheel device that only has two parts, is suitable for using in the motion of microminiature mechanical transmission or the low-power power.Its part is suitable for forming by injection molding with nylon or engineering plastics.
Summary of the invention
The object of the invention is to: design and a kind ofly be applicable to that microminiature machinery uses, the free wheel device that is only formed by two parts, it is many to overcome present free wheel device part, is not suitable for the shortcoming of microminaturization.
Fig. 1 is the erection drawing of this kind clutch.It is characterized in that: this kind free wheel device has 2 parts and forms, and is respectively outer ring 1 shown in Figure 2 and inner ring 2 shown in Figure 3; Inner ring 2 cylindricals are smooth circle; Outer ring 1 complex-shaped, its inboard is uniform-distribution with the identical groove of several shapes 6, and processes the curved submissive cantilever 4 identical with groove 6 quantity between two grooves; Curved submissive cantilever 4 is defined as its outside near a side of outer ring 1, and a side of close inner ring 2 is defined as its inboard; The end of curved submissive cantilever 4 has one to its inboard bump 3; The profile of bump 3 is by near the straight line I 10 on curved submissive cantilever 4 tops be connected apart from submissive arm top straight line II12 slightly far away with the Archimedes spiral 11 tangent transition connections that launch counterclockwise and form, as shown in Figure 5; The radius of curvature at Archimedes spiral 11 and straight line I 10 point of contacts less than with the radius of curvature at straight line II12 point of contact; The root in curved submissive cantilever 4 outsides is little submissive joint 8; Little submissive joint 8 is that curved submissive cantilever 4 is cut out semi-circular recesses in lateral root section, and curved submissive cantilever 4 is made in the thickness attenuation of root; Between little submissive joint 8 and projection 5, large submissive joint 7 is arranged; Large submissive joint 7 is to process in curved submissive cantilever 4 inboards with the radius of arc greater than little submissive joint 8 on curved submissive cantilever 4; There is a projection 5 in the outside, middle part of curved submissive cantilever 4; The profile of projection 5 is by forming near the straight line III13 of bump 3 and the straight line IV 14 in close little submissive joint 8; Straight line III13 and straight line IV 14 intersect at A point and B point with the lateral profile 15 of curved submissive cantilever 4 respectively; Straight line III13 and submissive cantilever 4 lateral profiles 15 form sharp angle α at A point tangent line; Straight line IV 14 forms acute angles beta with the tangent line that lateral profile 15 is ordered at B; Sharp angle α is less than about 15 ° to 25 ° of acute angles beta; The shape of groove 6 is identical with the shape of projection 5; Through hole 9 is arranged on the outer ring 1, be used for outer ring 1 is fixed on required equipment.
The working principle of the submissive cantilever free wheel device of outer shroud that the present invention proposes is described below:
The outer ring 1 of free wheel device uses elastic material to make, and when not being assembled together with inner ring 2, the envelope circular diameter d that the upper bump 3 of the curved submissive cantilever 4 on it forms is less than the radius of inner ring 2.When being assembled together with inner ring 2 when outer ring 1, resiliently deformables occur in little submissive joint 8 and large submissive joint 7, bump 3 are pressed on the cylindrical of inner ring 2.Fig. 1 is free wheel device disengaged position schematic representation.Free wheel device outer ring 1 clockwise rotates, and curved submissive cantilever 4 has the trend that is straightened, and Archimedes spiral 11 can't form snap-action with inner ring 2 in the bump 3, so inner ring 2 can't be with outer ring 1 motion; In like manner, when inner ring 2 rotated counterclockwise, outer ring 1 was not also with inner ring 2 motions.Fig. 6 is the schematic representation of free wheel device bonding state.When the free wheel device outer ring rotates counterclockwise, under the rubbing action between bump 3 and the inner ring 2, because the particularity of Archimedes spiral 13, bump 3 forms snap-action with inner ring 2, and bump 3 rotations make curved submissive cantilever 4 arch upward laterally under the effect in large submissive joint 7 and little submissive joint 8, projection 5 enters groove 6 and forms engagement, improve the support stiffness of submissive arm, guaranteed that bump 3 forms interlocking with inner ring 2, driven inner ring 2 motions; In like manner, when inner ring 2 clockwise rotates, also can drive the outer ring motion.
The present invention has only used two parts to form free wheel device according to submissive arm and submissive joint principle, and it is many to have remedied conventional free wheel device part, is difficult for miniaturization, is difficult for the shortcoming of maintenance, so that this free wheel device has wide actual application prospect.
Description of drawings
The submissive cantilever free wheel device of Fig. 1 outer shroud disengaged position figure.
The submissive cantilever free wheel device of Fig. 2 outer shroud outer ring parts drawing.
The submissive cantilever free wheel device of Fig. 3 outer shroud inner ring parts drawing.
Fig. 4 groove 6 enlarged views.
The profile schematic representation of Fig. 5 bump 3.
The submissive cantilever free wheel device of Fig. 6 outer shroud bonding state figure.
Embodiment
Embodiment of the present invention such as Fig. 1-shown in Figure 5.In experiment, use nylon to make as material.The outer ring external diameter is 10mm, the outer ring internal diameter is 8mm, used 3 grooves 6 and 3 curved submissive cantilevers 4, groove 6 degree of depth 0.3mm, the α angle is 20 °, the β angle is 45 °, the thickness of curved submissive cantilever 4 is 0.5mm, and the radius in large submissive joint 7 is 1.5mm, and the radius in little submissive joint 8 is 0.2mm, under unassembled state, the circular diameter d that bump 3 envelopes go out is 4.5mm.The external diameter of inner ring 2 is 6mm, and internal diameter is 4mm.Can transmit 9Nm moment in the experiment.
Claims (1)
1. the submissive cantilever free wheel device of outer shroud is characterized in that:
This kind free wheel device has 2 parts and forms, and is respectively outer ring (1) and inner ring (2); Inner ring (2) cylindrical is smooth circle; Inboard, outer ring (1) is uniform-distribution with the identical groove of several shapes (6), and processes the curved submissive cantilever (4) identical with groove (6) quantity between two grooves; Curved submissive cantilever (4) is defined as its outside near a side of outer ring (1), and a side of close inner ring (2) is defined as its inboard; The end of curved submissive cantilever (4) has one to its inboard bump (3); The profile of bump (3) is by near the straight line I (10) on curved submissive cantilever (4) top be connected apart from submissive arm top straight line II (12) slightly far away with the tangent transition connection of Archimedes spiral (11) and form;
The radius of curvature at Archimedes spiral (11) and straight line I (10) point of contact less than with the radius of curvature at straight line II (12) point of contact; The root in curved submissive cantilever (4) outside is little submissive joint (8); Little submissive joint (8) is that curved submissive cantilever (4) is cut out semi-circular recesses in lateral root section, and curved submissive cantilever (4) is made in the thickness attenuation of root; Between little submissive joint (8) and projection (5), large submissive joint (7) is arranged; Large submissive joint (7) is upward to process in curved submissive cantilever (4) inboard with the radius of arc greater than little submissive joint (8) at curved submissive cantilever (4); There is a described projection (5) in the outside, middle part of curved submissive cantilever (4); The profile of projection (5) is by forming near the straight line III (13) of bump (3) and the straight line IV (14) in close little submissive joint (8); Straight line III (13) and straight line IV (14) intersect at A point and B point with the lateral profile (15) of curved submissive cantilever (4) respectively; Straight line III (13) forms sharp angle α with submissive cantilever (4) lateral profile (15) at A point tangent line; Straight line IV (14) forms acute angles beta with the tangent line that lateral profile (15) is ordered at B; Sharp angle α is less than acute angles beta 15
0To 25
0The shape of groove (6) is identical with the shape of projection (5); Be useful on the through hole (9) that outer ring (1) is fixing on the outer ring (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210009289 CN102537128B (en) | 2012-01-12 | 2012-01-12 | Overrunning clutch with outer ring and flexible cantilevers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210009289 CN102537128B (en) | 2012-01-12 | 2012-01-12 | Overrunning clutch with outer ring and flexible cantilevers |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102537128A CN102537128A (en) | 2012-07-04 |
| CN102537128B true CN102537128B (en) | 2013-10-23 |
Family
ID=46344817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201210009289 Expired - Fee Related CN102537128B (en) | 2012-01-12 | 2012-01-12 | Overrunning clutch with outer ring and flexible cantilevers |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102537128B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104879401B (en) * | 2015-06-08 | 2017-05-03 | 北京联合大学 | Friction overrun clutch |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2833226Y (en) * | 2005-03-21 | 2006-11-01 | 蓝国水 | Electric vehicle motor cam self-locking type annular overrunning clutch |
| CN202597546U (en) * | 2012-04-19 | 2012-12-12 | 北京工业大学 | Overrunning clutch with outer ring and flexible cantilevers |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0861458A (en) * | 1994-08-23 | 1996-03-08 | Kiyotake Nakamori | Reverse rotation preventing mechanism |
| JP2006322612A (en) * | 2005-04-22 | 2006-11-30 | Kazuo Ishikawa | One-way clutch |
-
2012
- 2012-01-12 CN CN 201210009289 patent/CN102537128B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2833226Y (en) * | 2005-03-21 | 2006-11-01 | 蓝国水 | Electric vehicle motor cam self-locking type annular overrunning clutch |
| CN202597546U (en) * | 2012-04-19 | 2012-12-12 | 北京工业大学 | Overrunning clutch with outer ring and flexible cantilevers |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102537128A (en) | 2012-07-04 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| 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: 20131023 Termination date: 20140112 |