CN85107819B - Centrifugal clutch - Google Patents
Centrifugal clutch Download PDFInfo
- Publication number
- CN85107819B CN85107819B CN 85107819 CN85107819A CN85107819B CN 85107819 B CN85107819 B CN 85107819B CN 85107819 CN85107819 CN 85107819 CN 85107819 A CN85107819 A CN 85107819A CN 85107819 B CN85107819 B CN 85107819B
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- China
- Prior art keywords
- clutch
- mentioned
- internal gear
- cam
- hub
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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.)
- Expired
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- One-Way And Automatic Clutches, And Combinations Of Different Clutches (AREA)
- Mechanical Operated Clutches (AREA)
Abstract
A hydraulic control apparatus for controlling a hydraulically-operated power transmitting system for an automotive vehicle, the power transmitting system including a continuously variable transmission and an auxiliary transmission coupled to the continuously variable transmission. The auxiliary transmission has a first and a second forward-drive position relating to a high and a low speed range, respectively, which high and low speed ranges are selected by an operator controlled shift lever. The hydraulic control apparatus comprises a shift valve controlled by an electric control signal so as to be placed selectively in one of a high-range position and a low-range position to place the auxiliary transmission in the first and second forward-drive positions, respectively. The control apparatus further comprise a lock device for holding the shift valve in the high-range position, irrespective of the electric control signal, while the high speed range is selected by the shift lever.
Description
The invention relates to a kind of centrifugal clutch.Wherein there is device carry-over moment between friction plate and power output shaft of a supporting friction plate, this device is made up of two-part, these two-part are the wheel hubs with the internal gear of power output gear engagement and together with fitting loosely in internal gear, and this device is shifted friction plate onto on the position that clutch closes in piloting engine.
Smaller two-wheel vehicle or tricycle are all always, in the end of engine crankshaft, a centrifugal clutch is installed, and this crankshaft is input shaft.
An exemplary of this centrifugal clutch can be seen in day disclosure model utility NO.75331/1981.There is a clutch casing to be arranged on the cylindrical of input shaft at the centrifugal clutch shown in this open model utility, can turn round together with input shaft, together with a power output gear rises with the other part cylindrical loose fit of input shaft in addition, in addition, on clutch casing inner circumferential surface, also has axially movable clutch-plate.The internal gear being meshed with power output gear is arranged on the external peripheral surface of clutch casing.The clutch hub of supporting friction plate is arranged on the cylindrical of internal gear.
Like this, have two component configuration on this centrifugal clutch that everybody has the knack of between friction plate and power output gear, Here it is: internal gear and clutch hub.Adopting this collocation method is in order to make together with friction plate abuts against mutually with clutch-plate according to the operation of the moving device of pedal recoil, thereby makes engine start.More definite ground are said, as shown in Figure 5, make exactly the cam 36 (outstanding from internal gear) on internal gear 14 external peripheral surfaces be close to mutually with the wheel hub cam path 35 on clutch hub 13 inner circumferential surfaces.Wheel hub cam path has two relative sidewall 35a, 35b, and the cam 36 matching between them can along the circumferential direction move, and in addition, has a cam path rear wall 35C with gradient to tilt at axial direction, can be close to mutually with cam 36.The effect of this device is such, when according to the operation of Kick-start device, drive internal gear 14 in the time that direction shown in arrow X is turned round by power output gear, cam 36 just slides on the cam path rear wall 35C with gradient, move vertically thereby promote clutch casing 13, clutch is closed.Meanwhile, cam 36 is also pressed on cam path rear wall 35C at circumferencial direction, pilots engine thereby transmit a moment.
After once motor is started by Kick-start device, the moment of motor is just transmitted in reverse order, thereby clutch hub 13 turns round towards direction shown in arrow Y, cam 36 is slided along the cam path rear wall 35C with gradient, be close to mutually (as shown in Figure 6) with the sidewall 35a of wheel hub cam path 35, so just set up normal power delivery status, by internal gear 14, the power of motor is passed to output shaft.
Like this, on this device that everybody has the knack of, it is only by being close between cam 36 and wheel hub cam path 35 that the power between internal gear 14 and clutch hub 13 transmits.But, regrettably this device has some following shortcomings.
Its shortcoming be just when power transfer device in neutral position so that while making the race of engine, clutch can be automatically separately because rotating speed is low, centrifugal force is too little.However, clutch hub 13 also can have because of friction rotating trend, this is to pass to friction plate because existing oil in clutch can allow little power from clutch-plate on the one hand, also be because friction plate tends to contact with clutch-plate is local slightly on the other hand, this is because of at internal gear 14 and be loosely contained in and have certain little gap between the wheel hub 13 on internal gear.
Because internal gear 14 is not load-carrying in this case, be freely, therefore internal gear 14 because of with the contacting by with revolution of clutch hub 13, go out the same state that normal output shown in phenomenon Fig. 6 transmits.
So, because unloaded internal gear 14 can be by with revolution, also due to the fluctuation of crankshaft rotating speed, between the sidewall 35a of wheel hub cam path 35 and cam 36, will often cause and contact or collide, thus vibrative noise.
Therefore, one object of the present invention is exactly to provide a kind of centrifugal clutch of improved above-mentioned pattern can avoid producing the noise of above-mentioned vibration.
For this object, a kind of centrifugal clutch with shock absorber will be provided according to the present invention, sort buffer part system is manufactured by elastic material, can be contained on internal gear, also can install on clutch hub, adopting sort buffer part is exactly before will the cam on internal gear bumping with the respective side walls of wheel hub cam path, shock absorber elder generation to be contacted with wheel hub or internal gear.
The sectional view of the system of power transmission while shown in Fig. 1 being the clutch in the small-sized two-wheel car use embodiment of the present invention;
Shown in Fig. 2, be the sectional drawing of Fig. 1 along II-II, this is the state that pedal is fired an engine;
Shown in Fig. 3, be the sectional drawing of Fig. 1 along II-II, this is under the state in buffering or normal moment transmission;
Shown in Fig. 4, be the sectional drawing of Fig. 1 along II-II, this is the state before cushioning;
Shown in Fig. 5, be that a general clutch is under Kick-start state;
Shown in Fig. 6, be that general clutch is under normal moment transmit mode.
With reference to Fig. 1, on figure, show a limit portion of the crankcase 1 of motor E.Crankcase 1 is supporting a crankshaft 2, and crankshaft can rotate and as the input shaft of clutch.A jack shaft 3 and a power output shaft 4 are also housed on crankcase 1, and they all parallel with crankshaft 2.
The in the situation that of represented on figure, first to the 3rd speed changing transmission gear 5A, 5B and 5C are installed on jack shaft 3.Be arranged on jack shaft 3 with second power output gear 7 of damping spring 6 and stretch out the end beyond crankcase 1.
On the other hand, with corresponding speed changing transmission gear 5A, the speed change driven gear 8A that 5B and 5C are meshed, 8B and 8C are arranged on power output shaft 4.Speed changing transmission gear 5A-5C, speed change driven gear 8A-8C have formed a transmission device that can change speed together with the gear not showing on other figure.
A backflushing type starting arrangement (not showing on figure) is connected to first speed changing transmission gear 8A upper, this gear is arranged on the right-hand member of power output shaft 4, as shown in Figure 1.
On the other hand, in a limit portion of crankcase 1, clutch housing 9 is housed.This outer cover 9 adapts to centrifugal clutch C, below clutch C is illustrated.
Centrifugal clutch is arranged on one end of bent axle 2, is mainly made up of clutch casing 10, clutch-plate 11, friction plate 12, clutch hub 13, internal gear 14 and garter spring 15.
In above-mentioned these critical pieces, clutch casing 10 is to manufacture with the aluminum or aluminum alloy of die casting, and heart tapping has keyway therein, is contained in the end of crankshaft 2, and screw in the end of crankshaft a nut 16 in case on-slip go out.
On the other hand, on the internal circular surfaces of clutch casing outside circumference housing 19, have a series of on circumference the boss 22 at a distance of certain intervals each other, be used for inserting clutch-plate, these boss are stretched in radial direction inwards from circumference housing 19, and this sees the most clearly in Fig. 2.As shown in Figure 1, insert first end clutch-plate 23 near garter spring 15 in each boss 22 there, apart from second end clutch-plate 25 farthest of garter spring 15 and the clutch-plate 11 of two centres, clutch-plate 11 is between the centre of end clutch- plate 23 and 25 in the middle of these two.These clutch- plates 23,11,11 and 25 can only slide at axial direction.On figure 26 represents that one by the fixing baffle ring of boss 22.Between this baffle ring 26 and second end clutch-plate 25, a disc spring 27 is housed, makes the position of clutch-plate in " clutch closes ", also just be can the position of carry-over moment on.The guiding convex tendon 28 that has some to be uniformly distributed along the circumference between adjacent lands 22 on the inner circumferential surface of circumference housing 19 outside.In these guiding convex tendons, pin rod 29 is housed and is used for making clutch-plate 11 and friction plate 12 to be separated from each other, these pin rods are handled by a clutch operation 30, and this mechanism moves at both direction by a foot treadle.This structure is design like this, and in the time that pedal steps down, clutch separates pin rod and just moves, and the elastic force that makes second end clutch-plate 25 overcome disc spring 27 moves on on the position of " clutch separately ".
On the circumferential surface of the outside of clutch hub 13, there are some grip slippers 31.These grip slippers are used for fixing friction plate 12 and can be axially free to slide.The core of friction plate 12 is to manufacture with general purpose cold rolled sheet, and on the both sides of steel plate and outer surface, bag is with cork type high-abrasive material 32.
On clutch hub 13 outside circular surfaces, have a press flange 33, this flange is positioned at axial one end of wheel hub, faces friction plate 12.As can see from Figure 2, have three wheel hub cam paths 35 on the inner circumferential surface of clutch hub 13, these grooves are equidistant on circumference.
These wheel hub cam paths 35 are used for being close to mutually with the corresponding cam 36 on internal gear 14 outside circumferential surfaces.Each wheel hub cam path 35 has two relative sidewall 35a and 35b, separated by a distance corresponding cam 36 is moved therebetween at circumferencial direction, in addition, also has the cam path rear wall 35C in axial zone gradient.
In the time using the backflushing type starting arrangement said by engine start above, starting power is by first speed change driven gear 8A, first speed changing transmission gear 5A and second power output gear 7 are sent on first power output gear 37, this gear is contained on the cylindrical of crankshaft 2, so just a moment is delivered to internal gear 14 from first power output gear 37, thereby the cam 36 on internal gear 14 is slided on the rear wall of wheel hub cam path 35 along the direction of arrow indication in Fig. 2.As a result, when cam 36 moves on near second sidewall 35b of wheel hub cam path 35 after position (as shown in Figure 2), moment just can be delivered to clutch hub 13 from internal gear 14.So clutch hub 13 moves to the direction shown in arrow Z (Fig. 1) according to the operation of Kick-start device, thereby press flange 33 is pressed onto on friction plate 12 on clutch, makes engine start.
Once after motor starting, the power that motor produces is from passing to clutch hub 13 from crankshaft 2 by clutch casing 10, therefore, clutch hub 13 is just in the direction revolution shown in arrow Y, and its rotating speed is higher than the speed of internal gear 14.As a result, together with the sidewall 35a of wheel hub cam path 35 abuts against with cam 36, thereby make clutch be transformed into the normal moment transmit mode shown in Fig. 3 from the starting state shown in Fig. 2.
The of the present invention improved centrifugal clutch C with the basic structure of saying above, is characterized in that being equipped with shock absorber between internal gear 14 and wheel hub 13, below make specific description with regard to the one embodiment of the present of invention shown in Fig. 2 to Fig. 4.
On the inner circumferential surface of clutch hub 13, between adjacent wheel hub cam path 35, have buffering otch 34.These buffering otch 34 are used for holding the shock absorber 41 being arranged on internal gear 14 external peripheral surfaces, and this shock absorber system manufactures with rubber.Each shock absorber 41 is L-shaped, and its free end is a buffer portion 41a.As can see from Figure 4, buffer portion 41a, before cam 36 contacts with first sidewall 35a of wheel hub tongue 35, has just contacted with the opposing sidewalls 34a of buffering otch 34.Under normal moment transmit mode, buffer portion 41 produces enough resiliently deformables, thereby can make cam 36 be close to mutually with first sidewall 35a of corresponding wheel hub cam path 35, as shown in Figure 3.
When power transfer device is in the time that neutral position makes the race of engine, power is sent to clutch-plate 11 by clutch casing 10 from crankshaft 2,23, on 25 (as shown in Figure 1), and the output terminal of clutch now comprises that friction plate 12 and first power output gear 37 but do not produce revolution.
But, the rubbing action causing during due to clutch- plate 11,23,25 revolution and because the engine crankshaft rotating speed said above has fluctuation, cam 36 will back and forth move at both direction in wheel hub cam path 35.But, according to the present invention, before cam 36 contacts with the opposing sidewalls 35a of wheel hub cam path 35, shock absorber 41 on internal gear 14 is top with the opposing sidewalls 34a of buffering otch 34, (as shown in Figure 4) buffer portion 41a produces resiliently deformable, and its deformation extent is between the degree shown in Fig. 4 and Fig. 3.Therefore, cam 36 has been avoided with the phenomenon that the sidewall 35a of wheel hub cam path 35 often collides, and due to the buffer function that the resiliently deformable of shock absorber 41 produces, can prevent from colliding the caused vibration sound.
As can be seen from Figure 1, the outer peripheral part 11a of clutch-plate 11, that part namely coordinating with corresponding boss 22 is done thicklyer, its thickness is about radially three times by the thickness of inner part, so just formed one and impelled heat conducting part, it has strengthened the area of contact between the boss 22 on clutch-plate 11 and clutch casing 10.Clutch-plate 11 is to manufacture with pack alloy.This structure is effective for the scaling loss that prevents clutch engaging surface.Can notice, on the inner circumferential surface of internal gear 14, at the mid point of the axial direction of internal gear, ball bearing 42 has also been installed substantially.This ball bearing 42 can be guaranteed the position of clutch hub 13, effectively prevents that friction plate 12 from producing the trend of inclination.
The present invention also can have the embodiment of some other forms.Such as, cam 36 and wheel hub cam path 35 can be contained in respectively on clutch hub 13 and internal gear 14, although in the accompanying drawings in described embodiment, they are to be arranged on respectively on internal gear 14 and clutch hub 13.Equally, shock absorber 41 also can be arranged on clutch hub 13.
In addition, the present invention also can be applied on the centrifugal clutch of that pattern shown in the patent gazette Fig. 1 saying above.
Claims (1)
1. one has the centrifugal clutch of clutch hub, driving moment passes to above-mentioned clutch hub by clutch-plate and friction plate, there is an internal gear to be connected with load, on above-mentioned internal gear or above-mentioned clutch hub, cam is housed, to match with the wheel hub cam path on above-mentioned clutch hub or above-mentioned internal gear, each above-mentioned wheel hub cam path is separated by a distance at circumferencial direction, and all there is relative sidewall, corresponding cam can along the circumferential direction move between sidewall, it is characterized in that, the shock absorber of manufacturing with elastic material is equipped with on above-mentioned internal gear or above-mentioned wheel hub, the effect of above-mentioned shock absorber is being driven revolution to cause before the sidewall of above-mentioned cam and above-mentioned wheel hub cam path bumps along with above-mentioned clutch hub, shock absorber first contacts with above-mentioned internal gear or above-mentioned wheel hub.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP162959/84 | 1984-10-26 | ||
| JP16295984U JPH0239059Y2 (en) | 1984-10-26 | 1984-10-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85107819A CN85107819A (en) | 1986-05-10 |
| CN85107819B true CN85107819B (en) | 1987-04-08 |
Family
ID=15764529
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 85107819 Expired CN85107819B (en) | 1984-10-26 | 1985-10-23 | Centrifugal clutch |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH0239059Y2 (en) |
| CN (1) | CN85107819B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101315110B (en) * | 2007-05-30 | 2010-11-10 | 雅马哈发动机株式会社 | Centrifugal clutch and straddle type vehicle including the centrifugal clutch |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10210201A1 (en) * | 2002-03-07 | 2003-09-18 | Sram De Gmbh | Control of clutches, especially those for drive hubs in bicycles |
| JPWO2006006437A1 (en) * | 2004-07-08 | 2008-04-24 | ヤマハ発動機株式会社 | Centrifugal clutch, power unit and saddle riding type vehicle |
-
1984
- 1984-10-26 JP JP16295984U patent/JPH0239059Y2/ja not_active Expired
-
1985
- 1985-10-23 CN CN 85107819 patent/CN85107819B/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101315110B (en) * | 2007-05-30 | 2010-11-10 | 雅马哈发动机株式会社 | Centrifugal clutch and straddle type vehicle including the centrifugal clutch |
Also Published As
| Publication number | Publication date |
|---|---|
| CN85107819A (en) | 1986-05-10 |
| JPS6177433U (en) | 1986-05-24 |
| JPH0239059Y2 (en) | 1990-10-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| PB01 | Publication | ||
| C06 | Publication | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee |