CN100390434C - Cambered surface friction overdrive clutch - Google Patents
Cambered surface friction overdrive clutch Download PDFInfo
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- CN100390434C CN100390434C CNB2006100709653A CN200610070965A CN100390434C CN 100390434 C CN100390434 C CN 100390434C CN B2006100709653 A CNB2006100709653 A CN B2006100709653A CN 200610070965 A CN200610070965 A CN 200610070965A CN 100390434 C CN100390434 C CN 100390434C
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- cambered surface
- surface friction
- outer shroud
- overrunning clutch
- clutch block
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Abstract
The present invention discloses a cambered surface friction overdrive clutch. The overdrive clutch is mainly composed of an inner ring and an outer ring, wherein the inner ring is divided into a cambered surface friction block and an overdrive clutch block by the present invention; the cambered surface friction block is arranged between the overdrive clutch block and the outer ring; a revolving idle stroke is correspondingly reserved between the overdrive clutch block and the cambered surface friction block. The overdrive clutch block and the outer ring generate radial movement through the overdrive clutch characteristics of the overdrive clutch block of the inner ring and the mutual movement of the outer ring in work; therefore, the inner peripheral surface of the outer ring and the cambered surface friction block of the inner ring are engaged and disengaged. The overdrive clutch has the advantages of portable engagement and disengagement, high bearing capacity, simple structure and convenient manufacture, and is suitable for different unidirectional transmission with large powder and medium power.
Description
Technical field
The present invention relates to a kind of ratchet mechanism, especially a kind of friction overdrive clutch mechanism.
Technical background
Present known ratchet has two kinds of tooth-like and friction types.Tooth ratchet mechanism relies on the engagement of the ratchet and the gear teeth to come transmitting movement and power, though it is simple in structure, reliable operation, but boundary dimension is big, belong to a grade combination is arranged, and impact bigger when engaging, ratchet slides on hook tooth during the operation backhaul, crown weares and teares easily, produce noise and heat, existence owing to idle running (ratchet falls into the stroke that ratchet needs) simultaneously produces impact, and the maximum idle running value of its clutch (ultimate range of ratchet from a last dedentition to next tooth) is big in addition, permission clutch rotating speed is low.Though the friction type ratchet does not have above-mentioned shortcoming, because the surface of contact of its joint is less, transmission capacity is more limited, and roller or voussoir are a kind of compact form transmissions of holding under the arm during work done; It is big more or high speed impact is heavy more that it transmits strength, hold under the arm tight must be severe more, when folding, just need more strength remove to overcome this clamping force, thereby its bearing capacity and efficient are relatively low.
Summary of the invention
The purpose of this invention is to provide the cambered surface friction overdrive clutch that a kind of folding is light, bearing capacity is high.
In order to reach above-mentioned goal of the invention, the technical solution adopted in the present invention is: it mainly is made up of interior ring and outer shroud, it is characterized in that interior ring is divided into cambered surface friction piece and overrunning clutch block, cambered surface friction piece outer arced surface arc length is less than the semicircle of outer shroud inner headed face, and the working principle of overrunning clutch block is identical with roller type or Wedge type over running clutch; The cambered surface friction piece is installed in overrunning clutch block and outer interannular, and the relative cambered surface friction interblock of overrunning clutch block leaves the revolution idle running.When interior ring and outer shroud and extraneous transmission joint, have to be the radial floating connecting structure more than one.The radius of cambered surface friction piece outer arced surface is preferably with the radius of outer shroud inner peripheral surface and equates.Installation shaft and the outer interannular of ring in the cambered surface friction piece also can be directly installed on, and overrunning clutch block turns round synchronously with installation shaft and connects.
The working principle of this free wheel device is: the overdrive clutch characteristic and the outer shroud of the overrunning clutch block by interior ring move mutually, and overrunning clutch block and outer interannular generation are moved radially, thereby the outer shroud inner peripheral surface is engaged with the cambered surface friction piece of interior ring and separate.
Overrunning clutch block contacts with the cambered surface friction piece all the time at the front end of its engagement movement direction when engaging for assurance, and overrunning clutch block can be installed torsion spring or pressure spring at the tail end and the cambered surface friction interblock of its engagement movement direction; Or overrunning clutch block can be installed torsion spring or draught spring at the front end and the cambered surface friction interblock of its engagement movement direction; This structure is when outer shroud particularly suitable when initiatively encircling.
The beneficial effect of this free wheel device is: the cambered surface friction piece is face with outer shroud and contacts, the while overrunning clutch block can produce very big radial compaction power makes the cambered surface friction piece engage with outer shroud, and overrunning clutch block also has bigger bearing capacity, thereby its bearing capacity than existing various roller types or Wedge type over running clutch is big; In addition its to surmount process be after removing earlier wedge by overrunning clutch block, makes cambered surface friction piece and outer shroud not have radial compaction power and realize that frictional force was little when this structure was removed wedge, thereby its separation is light; This free wheel device also has simple in structure, easily manufactured advantage simultaneously.
Description of drawings
Fig. 1, Fig. 2 are the structural drawing of first embodiment of the invention, and Fig. 2 is the A-A sectional view of Fig. 1; Wherein: 1 is outer shroud, and 2 is the cambered surface friction piece, and 3 is overrunning clutch block, 4 is installation shaft, and 5 is needle bearing, and 6 is baffle plate, 7 is circlip, and 8 is driving key, and 9 is O shape spring, 10 is roller, and 11 are the centering roller, and 12 is annular spring, 13 is spring sheet, and 14 is locating stud, and 15 is torsion bar spring, 16 is that locating stud 2,22 is centering roller 2.
Fig. 3, Fig. 4, Fig. 5 are the structural drawing of second embodiment of the invention, and Fig. 4 is the B-B sectional view of Fig. 3, and Fig. 5 is the C-C sectional view of Fig. 3; Wherein: 23 is outer shroud, and 24 is the cambered surface friction piece, and 25 is overrunning clutch block, and 26 is baffle plate, and 27 is that draught spring 1,28 is that draught spring 2,29 is an arc-shaped spring piece, and 30 is voussoir, and 31 is the elasticity ejector pin.
Fig. 6 is that second embodiment ginseng is separated figure
Embodiment
Embodiment one
With reference to Fig. 1, the first embodiment of the present invention shown in Figure 2, its outer shroud (1) is a driven torus, and interior ring is initiatively to encircle.Cambered surface friction piece (2) is directly installed between installation shaft (4) and outer shroud (1), and the friction when surmounting separation for minimizing between cambered surface friction piece (2) and installation shaft (4) is equipped with needle bearing (5) between cambered surface friction piece (2) and installation shaft (4); The arc round angle of cambered surface friction piece (2) is 150 degree.Overrunning clutch block (3) adopts roller friction overdrive clutch structure, and overrunning clutch block (3) cambered surface friction piece (2) relatively leaves the 5 revolution idle runnings of spending.Carry out transfer motion power with a driving key (8) between installation shaft (4) and overrunning clutch block (3).Be equipped with in the inside and outside ring bi-side prevent overrunning clutch block (3) and outer shroud (1) move axially baffle plate (6), this baffle plate (6) and overrunning clutch block (3) and outer shroud (1) both sides Spielpassung; Circlip (7) is installed on the installation shaft limits moving axially of inside and outside ring.Overrunning clutch block (3) is equipped with torsion bar spring (15) between the front end of its engagement movement direction and cambered surface friction piece (2).The centrifugal force that ring runs up in when separating for preventing to surmount makes the unnecessary friction of cambered surface friction piece (2) and outer shroud (1), and respectively hold tightly mutually with an O shape spring (9) bi-side between overrunning clutch block (3) and cambered surface friction piece (2).The friction of cambered surface friction piece (2) and outer shroud (1) when surmounting in order to reduce, the neutral position of arc length has a groove outside cambered surface friction piece (2), centering roller (11) and annular spring (12) are housed in the groove, and annular spring (12) is between between centering roller (11) and cambered surface friction piece (2); In order to guarantee that the roller (10) that cambered surface friction piece (2) is equipped with on centering roller (11) and annular spring (12) the back overrunning clutch block (3) has certain clearance when surmounting, can be when mounted, outer shroud radius of suit is slightly larger than the bearing of this free wheel device outer shroud (1), and outer race and free wheel device outer shroud radius difference are surmounting maximum radial displacement amount when engaging less than the roller (10) in the overrunning clutch block (3).For guarantee cambered surface friction piece (2) be equipped with centering roller (11) and roller on the overrunning clutch block of annular spring (12) back when surmounting, have the certain clearance present embodiment adopted overrunning clutch block (3) be the center with cambered surface friction piece (2) slotting position, a centering roller 2 (22) is respectively installed at the two ends of basic symmetry when surmounting; Centering roller 2 (22) radius values add its axle center to the radius value in installation shaft (4) axle center less than outer shroud (1) inner peripheral surface radius value, but add roller (10) radius value to the least radius value in installation shaft (4) axle center greater than roller (10) axle center.
Exterior power is rotated counterclockwise by driving key (8) drive overrunning clutch block (3) by installation shaft (4) during work, roller (10) is contacted with outer shroud (1) and overrunning clutch block (3) by spring sheet and centrifugal forces affect, along with the continuation relative movement of overrunning clutch block (3) with outer shroud (1), roller (10) begins wedging, moves radially thereby the relative installation shaft (4) of outer shroud (1) is produced.Along with moving radially of outer shroud (1), its inner peripheral surface begins to hold tightly cambered surface friction piece (2), this moment, installation shaft (4) power promoted cambered surface friction piece (2) through overrunning clutch block (3), and cambered surface friction piece (2) drives outer shroud (1) work by the frictional force of outer arced surface and outer shroud (1) inner peripheral surface; Meanwhile the roller of overrunning clutch block (10) by with the friction of outer shroud (1) inner peripheral surface and overrunning clutch block (3) working surface, auxiliaryly drive outer shroud (1) work.This moment is if the power of outer shroud (1) demand is bigger, cambered surface friction piece (2) will produce with outer shroud (1) inner peripheral surface and skid, roller (10) is subjected to the friction of outer shroud (1) inner peripheral surface to continue wedging simultaneously, thereby make outer shroud (1) engage tightlyer, till installation shaft (4) and outer shroud (1) are synchronized with the movement with cambered surface friction piece (2) and roller (10).When outer shroud (1) rotating speed during greater than installation shaft (4), this free wheel device begins to enter and surmounts state; Be equipped with needle bearing because the relative cambered surface friction piece (2) of overrunning clutch block (3) leaves between the 5 revolution idle runnings of spending and cambered surface friction piece and installation shaft this moment, and use key formula Synchronous Transmission between installation shaft (4) and overrunning clutch block (3), thereby overrunning clutch block (3) produces relative movement with beginning earlier with outer shroud (1), thereby make roller (10) begin wedge, loosen compressing of outer shroud (1) and cambered surface friction piece (2), after roller (10) removes wedge fully, cambered surface friction piece (2) does not have impacting force with outer shroud (1), cambered surface friction piece (2) is contacted with overrunning clutch block (3) by torsion bar spring and centrifugal forces affect, and is subjected to overrunning clutch block (3) to promote to continue revolution work.
Embodiment two
With reference to Fig. 3, Fig. 4, second embodiment shown in Figure 5, its outer shroud (23) is a driven torus, and interior ring is a ring initiatively.Cambered surface friction piece (24) is installed between overrunning clutch block (25) and outer shroud (23); Friction when surmounting separation between cambered surface friction piece (24) and overrunning clutch block (25) for minimizing, inner cylindrical surface middle part at the cambered surface friction piece has annular dead slot to reduce friction area (seeing I portion among Fig. 3), also can the needle roller (see figure 6) be installed at cambered surface friction piece and overdrive clutch interblock; The contacted arc round angle of cambered surface friction piece (24) is 150 degree.Overrunning clutch block (25) adopts the Wedge type over running clutch structure, and overrunning clutch block (25) cambered surface friction piece (24) relatively leaves the 5 revolution idle runnings of spending (seeing the K portion among Fig. 5).Be equipped with in the inside and outside ring bi-side prevent overrunning clutch block (25) and outer shroud (23) move axially baffle plate (26), this baffle plate (26) is a Spielpassung with cambered surface friction piece (24) and outer shroud (23) both sides; Two baffle plates (26) are installed on the overrunning clutch block (25) with screw.Overrunning clutch block (25) is equipped with draught spring 1 (27) between the front end of its engagement movement direction (being the counter clockwise direction among Fig. 4) and cambered surface friction piece (24).The centrifugal force that ring runs up in when separating for preventing to surmount makes the unnecessary friction of cambered surface friction piece (24) and outer shroud (23), and overrunning clutch block (25) is equipped with the draught spring 2 (28) of pulling force less than draught spring 1 (27) between the tail end of its engagement movement direction (being the clockwise direction among Fig. 4) and cambered surface friction piece (24).The friction of cambered surface friction piece (24) and outer shroud (23) has a groove when surmounting separation in order to reduce near the inner cylindrical surface of the position stressed centre of joint of overrunning clutch block (25), and arc spring (29) is housed in the groove.
Present embodiment outer shroud (23) is that transition fit is installed with output shaft, in order to guarantee cambered surface friction piece (24) certain clutch gap is arranged; Input shaft is installed with rolling bearing transition fit and output shaft coaxial line, and with interior ring mounting hole Spielpassung, its gap value is greater than the radial clearance summation of overrunning clutch block (25), cambered surface friction piece (24), outer shroud (23) again.
When present embodiment engages, by voussoir (30) and outer shroud (23) inner cylindrical surface friction, thereby promoting overrunning clutch block (25) generation moves radially, because input shaft and interior ring mounting hole Spielpassung, and its gap value is greater than the radial clearance summation of overrunning clutch block (25), cambered surface friction piece (24), outer shroud (23); Thereby overrunning clutch block (25) promotes cambered surface friction piece (24) to be held tightly mutually with outer shroud (23), thereby realizes its joint work.It surmounts when separating, because overrunning clutch block (25) cambered surface friction piece (24) relatively leaves revolution idle running (seeing figure K portion), thereby overrunning clutch block (25) produces relative movement with beginning earlier with outer shroud (23), thereby make voussoir (30) begin wedge, loosen compressing of outer shroud (23) and cambered surface friction piece (24), after voussoir (30) removed wedge fully, cambered surface friction piece (24) did not have impacting force with outer shroud (23), thereby realized mask work; Separate the back because the tension of draught spring 1 (27) and draught spring 2 (28) and arc-shaped spring piece (29) promote overrunning clutch block (25) skew through input shaft, thereby make cambered surface friction piece (24) not be subjected to centrifugal forces affect and outer shroud (23) friction.In addition because the elastic force of draught spring 1 (27) greater than draught spring 2 (28), thereby goes wedge rear arc brake pad (24) contacted with overrunning clutch block (25) by draught spring 1 (27) traction at overrunning clutch block (25); Thereby when having guaranteed joint, after cambered surface friction piece (24) was held tightly mutually with outer shroud (23), power was just directly passed to outer shroud (23) from overrunning clutch block (25) through cambered surface friction piece (24).
Claims (7)
1. cambered surface friction overdrive clutch, it mainly is made up of interior ring and outer shroud, it is characterized in that: interior ring is divided into cambered surface friction piece and overrunning clutch block, cambered surface friction piece outer arced surface arc length is less than the semicircle of outer shroud inner headed face, and the working principle of overrunning clutch block is identical with roller type or Wedge type over running clutch; The cambered surface friction piece is installed in overrunning clutch block and outer interannular, and the relative cambered surface friction interblock of overrunning clutch block leaves the revolution idle running; When interior ring and outer shroud and extraneous transmission joint, have to be the radial floating connecting structure more than one.
2. cambered surface friction overdrive clutch, it mainly is made up of interior ring and outer shroud, it is characterized in that: interior ring is divided into cambered surface friction piece and overrunning clutch block, cambered surface friction piece outer arced surface arc length is less than the semicircle of outer shroud inner headed face, and the working principle of overrunning clutch block is identical with roller type or Wedge type over running clutch; Installation shaft and the outer interannular of ring in the cambered surface friction piece is installed in, and overrunning clutch block turns round synchronously with installation shaft and connects; The relative cambered surface friction interblock of overrunning clutch block leaves the revolution idle running; When interior ring and outer shroud and extraneous transmission joint, have to be the radial floating connecting structure more than one.
3. cambered surface friction overdrive clutch as claimed in claim 1 is characterized in that: the radius of described cambered surface friction piece outer arced surface equates with the radius of outer shroud inner peripheral surface.
4. cambered surface friction overdrive clutch as claimed in claim 2 is characterized in that: described installation shaft and cambered surface friction interblock are equipped with bearing.
5. cambered surface friction overdrive clutch as claimed in claim 1 is characterized in that: the inner cylindrical surface middle part of described cambered surface friction piece has annular dead slot.
6. cambered surface friction overdrive clutch as claimed in claim 1 is characterized in that: described cambered surface friction piece and overdrive clutch interblock are equipped with needle roller.
7. cambered surface friction overdrive clutch as claimed in claim 1 is characterized in that: described overrunning clutch block has a groove on the inner cylindrical surface that engages near the position stressed centre, arc spring is housed in the groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100709653A CN100390434C (en) | 2005-05-24 | 2006-03-29 | Cambered surface friction overdrive clutch |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200510071540 | 2005-05-24 | ||
| CN200510071540.X | 2005-05-24 | ||
| CNB2006100709653A CN100390434C (en) | 2005-05-24 | 2006-03-29 | Cambered surface friction overdrive clutch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1869467A CN1869467A (en) | 2006-11-29 |
| CN100390434C true CN100390434C (en) | 2008-05-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100709653A Active CN100390434C (en) | 2005-05-24 | 2006-03-29 | Cambered surface friction overdrive clutch |
Country Status (1)
| Country | Link |
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| CN (1) | CN100390434C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101995487B (en) * | 2009-08-11 | 2014-07-16 | 洪涛 | Relative movement direction sensing device and reversal starting prevention device |
| CN104963964B (en) * | 2015-07-03 | 2017-09-26 | 深圳市超越传动科技有限公司 | Low secondary cambered surface scotch formula freewheel clutch |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10110749A (en) * | 1996-10-04 | 1998-04-28 | Origin Electric Co Ltd | One-way clutch |
| JP2002317830A (en) * | 2001-04-18 | 2002-10-31 | Yutaka Giken Co Ltd | One-way clutch |
| CN2559828Y (en) * | 2002-08-01 | 2003-07-09 | 刘洪贵 | Roller clutch |
| CN2573766Y (en) * | 2001-07-06 | 2003-09-17 | 何党恩 | Bead anti-impacting energy-saving clutch |
| CN1573156A (en) * | 2002-09-29 | 2005-02-02 | 林志贺 | Roller toothed type ratchet |
-
2006
- 2006-03-29 CN CNB2006100709653A patent/CN100390434C/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10110749A (en) * | 1996-10-04 | 1998-04-28 | Origin Electric Co Ltd | One-way clutch |
| JP2002317830A (en) * | 2001-04-18 | 2002-10-31 | Yutaka Giken Co Ltd | One-way clutch |
| CN2573766Y (en) * | 2001-07-06 | 2003-09-17 | 何党恩 | Bead anti-impacting energy-saving clutch |
| CN2559828Y (en) * | 2002-08-01 | 2003-07-09 | 刘洪贵 | Roller clutch |
| CN1573156A (en) * | 2002-09-29 | 2005-02-02 | 林志贺 | Roller toothed type ratchet |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1869467A (en) | 2006-11-29 |
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Free format text: FORMER OWNER: DING ZHENHUA Effective date: 20110830 |
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Free format text: CORRECT: ADDRESS; FROM: 350003 FUZHOU, FUJIAN PROVINCE TO: 213164 CHANGZHOU, JIANGSU PROVINCE |
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| TR01 | Transfer of patent right |
Effective date of registration: 20110830 Address after: Jiangsu province Changzhou City Cheung Road 213164 Wujin District hi tech Development Zone No. 9 Patentee after: Jiangsu Nanfang Bearing Co., Ltd. Address before: 350003 Huahong security Technology Development Company, 4F daily building, 84 Hualin Road, Fujian, Fujian, Fuzhou Patentee before: Ding Zhenhua |
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| CP03 | Change of name, title or address |
Address after: 213000 Longxiang Road, Wujin high tech Development Zone, Changzhou City, Jiangsu Province Patentee after: Jiangsu Nanfang Precision Industry Co.,Ltd. Address before: 213164 No. 9, Longxiang Road, high tech Development Zone, Wujin District, Changzhou City, Jiangsu Province Patentee before: Jiangsu Nanfang Bearing Co.,Ltd. |
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| CP03 | Change of name, title or address |