CN100373069C - Centrifugal type clutch and its assembly method - Google Patents
Centrifugal type clutch and its assembly method Download PDFInfo
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- CN100373069C CN100373069C CNB2005100981056A CN200510098105A CN100373069C CN 100373069 C CN100373069 C CN 100373069C CN B2005100981056 A CNB2005100981056 A CN B2005100981056A CN 200510098105 A CN200510098105 A CN 200510098105A CN 100373069 C CN100373069 C CN 100373069C
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Abstract
This centrifugal clutch is composed of the clutch housing 12 composed of a circular cylindrical part 12a whose inner face becomes a slide-contact face and a bottom plate part 12b covering one end part of the circular cylindrical part, a rotary shaft which has the same axis as the circular cylindrical part of the clutch housing and to which rotation force is transmitted by the clutch housing, a centrifugal shoe for connecting with the clutch housing or disconnecting from it by rotating around the rotary shaft and coming into contact with or leaving the slide-contact face, and a vibration control cover 17 put on an outer side of the circular cylindrical part. The clutch housing and the vibration control cover have contact parts 30, 40 coming into contact mutually, a non-contact part 50 not in contact, and positioning marks 14, 22 for positioning the clutch housing and the vibration control cover at predetermined relative positions for preventing occurrence of abnormal sound.
Description
Technical field
The present invention relates to centrifugal clutch and assembly method thereof.
Background technique
The centrifugal clutch of equipments such as motorcycle is by constituting with the bottom: internal surface is as the cylindrical part of slidingsurface; The bowl-type clutch housing that constitutes by the base plate that covers this cylindrical part one end; Coaxial and torque is from clutch housing transmission rotatingshaft thereon with the cylindrical part of this clutch housing; And because the rotation of this rotatingshaft and the centrifugal hoof that engages or separate with described clutch housing with described slidingsurface contact or separately the time.
This clutch can produce uncomfortable noise with separating owing to the joint of clutch usually.One of them reason is the vibration of clutch housing cylindrical part.
Fig. 6 (A) and Fig. 6 (B) are the schematic representation that perspective shows the clutch housing vibration.
Circle c represents the cylindrical part of clutch housing, and centrifugal hoof (not shown) inwall with this cylindrical part when rotating contacts.In example (A), vibration is spent the cycle with 120 and is occurred on the circle, and vibration node d and (ripple) abdomen e repeat with 60 degree (at interval).As shown by arrows, abdomen e is in radial vibration, and node d does not vibrate.Similarly, in example (B), the vibration with 90 spend the cycle occur in the circle on, vibration node d and abdomen e with 45 the degree (at interval) repeat.This cycle around circular vibration is according to Several Factors, for example the weight of the rotating speed of centrifugal hoof and material and clutch housing and shape and change.
Because this vibration of clutch housing, when vibration abdomen e moved to radially inner side, centrifugal hoof contacted with clutch housing when rotating.Cause abnormal noise at the clutch housing of vibration and this Continuous Contact between the centrifugal hoof.Therefore, wish and particularly, to suppress the generation of abnormal sound by suppressing the vibration of clutch housing by suppressing the displacement of abdomen e.
Having proposed shell vibration suppression that a kind of wherein clutch housing covered by the vibration suppression plate constructs and suppresses the abnormal sound (patent documentation 1) that the centrifugal friction bonding apparatus produces.Disclosed shell vibration suppression structure is intended to prevent by such method the generation of abnormal sound in the patent documentation 1: slowly reduce the pressure on the vibration suppression plate top of press fit to the clutch housing, form recess vertically at above-mentioned top end simultaneously.
But in the disclosed shell vibration suppression structure, the radial displacement of the vibration abdomen of the clutch housing shown in earlier figures 6 (A) and Fig. 6 (B) can not fully be suppressed in patent documentation 1, like this in the effect that just can not obtain to give prominence to aspect the inhibition abnormal sound.
Patent documentation 1: No. 3322015 communique of Japan's special permission.
Summary of the invention
Take above-mentioned conventional art into consideration, one object of the present invention is effectively to suppress the vibration of clutch housing and provides a kind of fully to suppress the centrifugal clutch that abnormal sound produces.Another purpose is to provide a kind of method of assembling this centrifugal clutch.Another purpose is to provide a kind of vehicle that is equipped with this centrifugal clutch, for example motorcycle.
For achieving the above object, the invention provides a kind of centrifugal clutch, it comprises: by internal surface as the cylindrical part of slidingsurface with cover the clutch housing that the base plate of this cylindrical part one end is formed; Coaxial and torque is from clutch housing transmission rotatingshaft thereon with the cylindrical part of this clutch housing; Because the rotation of this rotatingshaft and the centrifugal hoof that engages or separate with described clutch housing with described slidingsurface contact or separately the time; Vibration-proof cover with the outside that covers described cylindrical part.In addition, described clutch housing and described vibration-proof cover comprise contacting part, non-contact portion and positioning mark, described contacting part and described non-contact portion arrange along the circumferencial direction of the cylindrical part of described clutch housing, at described contacting part, clutch housing and vibration-proof cover are in contact with one another, in described non-contact portion, clutch housing and vibration-proof cover are separated from each other, and described positioning mark determines that the relative position of clutch housing and vibration-proof cover is to prevent to produce abnormal sound.
Because this centrifugal clutch has positioning mark, so clutch housing and vibration-proof cover are positioned at the relative position of the generation that can suppress abnormal sound.When clutch housing and vibration-proof cover are formed with non-contact portion at the position that can effectively suppress abnormal sound (being above-mentioned contacting part) keep in touch.Therefore, can realize high vibration-isolating effect (preventing the effect that abnormal sound produces).
According to technology disclosed herein, by positioning mark is set, clutch housing can prevent ideally that the predetermined relative positions that abnormal sound produces from contacting with vibration-proof cover.
The present invention also provides a kind of method of assembling centrifugal clutch.
The assembly method of centrifugal clutch disclosed herein is the method for assembling a kind of like this centrifugal clutch, and wherein this clutch comprises: by internal surface as the cylindrical part of slidingsurface with cover the clutch housing that the base plate of this cylindrical part one end is formed; Coaxial and torque is from clutch housing transmission rotatingshaft thereon with the cylindrical part of this clutch housing; Because the rotation of this rotatingshaft and the centrifugal hoof that engages or separate with described clutch housing with described slidingsurface contact or separately the time; Vibration-proof cover with the outside that covers described cylindrical part.
In addition, thus this method comprises the following steps: to prepare to have specifically labelled clutch housing and the vibration-proof cover that the relative position that can determine clutch housing and vibration-proof cover prevents to produce abnormal sound; Contacting part and clutch housing and the separated non-contact of vibration-proof cover portion that clutch housing and vibration-proof cover are in contact with one another are set at the predetermined relative positions place, and wherein the outside of the cylindrical part of clutch housing is covered by vibration-proof cover.
According to this method, can stably assemble centrifugal clutch with high vibration-isolating effect (preventing to produce the effect of abnormal sound).
According to the preferred embodiment of centrifugal clutch disclosed herein, on the base plate of clutch housing, be formed with opening.And the position of opening and vibration-proof cover contacting part is predetermined.
Above-mentioned opening can be used as desirable positioning mark, and the setting of opening also helps the lightweight of centrifugal clutch.
The assembly method that the centrifugal clutch of the clutch housing that is formed with opening on it is housed is a desirable embodiment of the method for assembling centrifugal clutch disclosed herein.
According to a preferred embodiment of centrifugal clutch disclosed herein, be formed with the protuberance of press fit at the internal surface of vibration-proof cover to the cylindrical part outer surface, the position of the contacting part of described protuberance and clutch housing is predetermined.
Press fit can be used as the have high vibration-isolating effect contacting part of (preventing the effect that abnormal sound produces) to the protuberance of the cylindrical part outer surface of clutch housing.
The assembly method that the centrifugal clutch of the vibration-proof cover that is formed with protuberance on it is housed is a desirable embodiment of the method for assembling centrifugal clutch disclosed herein.
A preferred embodiment according to centrifugal clutch disclosed herein is formed with opening on the base plate of clutch housing, be formed with the protuberance of press fit to the cylindrical part outer surface on the internal surface of vibration-proof cover.And the position of above-mentioned opening and protuberance is predetermined.
By covering the protuberance press fit that forms on the vibration-proof cover internal surface of clutch housing outer surface, can suppress because the radial displacement that the vibration of clutch housing brings, and can effectively prevent the generation of abnormal sound to clutch housing.
Especially, according to a preferred embodiment, above-mentioned protuberance is positioned at and the corresponding in a circumferential direction position of above-mentioned opening around the internal surface of vibration-proof cover.
Being formed on aperture position on the clutch housing base plate tends to vibrate abdomen identical.Therefore, be positioned near such position and cylindrical part, can effectively suppress the vibration of cylindrical part, and can prevent the generation of abnormal sound from outside press fit to clutch housing by the protuberance that makes vibration-proof cover.
The assembly method that the centrifugal clutch of the vibration-proof cover that is formed with protuberance on it is housed is a desirable embodiment of the method for assembling centrifugal clutch disclosed herein.
A preferred embodiment according to centrifugal clutch disclosed herein, cylindrical side portion in vibration-proof cover is formed with two protuberances at least, and the sidepiece between adjacent protuberance has from the crooked inwardly shape of imaginary circle that with the rotatingshaft is the protruding terminus of center connection protuberance.
By cover the outside of the cylindrical part of clutch housing with vibration-proof cover, can suppress vibration by the cylindrical part of protuberance (projecting edge) contact clutch housing with above-mentioned shape.And the sidepiece between the two adjacent protuberances has one from the crooked shape of imaginary circle inwardly, and the sidepiece (to call " mitigation bent side " in the following text) that therefore has the curve that more relaxes than imaginary circle also can contact with clutch housing.Therefore, vibration-proof cover can contact with clutch housing relative broad range (in other words, more contacting parts being arranged).Therefore, increase the shock absorption energy, improved the inhibition effect of abnormal sound.
According to a preferred embodiment of centrifugal clutch disclosed herein, the contacting part of clutch housing and the contacting part of vibration-proof cover comprise the face contacting part that line contacting part that mutual line contacts contacts with face mutually respectively.Preferably, the contacting part of the contacting part of clutch housing or vibration-proof cover comprises the protuberance with the contacting part line contact of relative another.
Correspondingly, by line contacting part and face contacting part, clutch housing and vibration-proof cover are in contact with one another at relative broad range (in other words, more contacting parts being arranged).Therefore, increase the shock absorption energy, improved the inhibition effect of abnormal sound.
According to a preferred embodiment of centrifugal clutch disclosed herein, a kind of centrifugal clutch comprises: by internal surface as the cylindrical part of slidingsurface with cover the clutch housing that the base plate of this cylindrical part one end is formed; Coaxial and torque is from clutch housing transmission rotatingshaft thereon with the cylindrical part of this clutch housing; Because the rotation of this rotatingshaft and the centrifugal hoof that engages or separate with described clutch housing with described slidingsurface contact or separately the time; Vibration-proof cover with the outside that covers described cylindrical part, wherein, described vibration-proof cover comprises that at least two positions beyond the vibration node of the cylindrical part of described clutch housing contact the contacting part of described clutch housing, with the non-contact portion that does not contact and along the circumferential direction be arranged on the both sides of each contacting part with described clutch housing.
According to this structure of centrifugal clutch, avoided clutch housing to contact with the vibration node place of vibration-proof cover in the cylindrical part of clutch housing, contact in the position that effectively prevents to vibrate with vibration-proof cover by making clutch housing, can effectively prevent the generation of abnormal sound.
Especially, thus preferably have and determine that precalculated position that clutch housing contacts with vibration-proof cover easily avoids the specifically labelled centrifugal clutch of vibration node position.
The present invention also provides the method for a kind of like this centrifugal clutch of another kind of assembling, and this clutch comprises: by internal surface as the cylindrical part of slidingsurface with cover the clutch housing that the base plate of this cylindrical part one end is formed; Coaxial and torque is from clutch housing transmission rotatingshaft thereon with the cylindrical part of this clutch housing; Because the rotation of this rotatingshaft and the centrifugal hoof that engages or separate with described clutch housing with described slidingsurface contact or separately the time; Vibration-proof cover with the outside that covers described cylindrical part.This method may further comprise the steps: the outside that covers the cylindrical part of described clutch housing with described vibration-proof cover, make at least two positions of pre-determined contacting part beyond the vibration node position of the cylindrical part of this clutch housing with the cylindrical part contact of this clutch housing, and non-contact portion in the both sides of each contacting part along the circumferential direction with the cylindrical part of this clutch housing separately.
According to this method, can stably assemble the centrifugal clutch that has high vibration-isolating effect (preventing the effect that abnormal sound produces).
Especially, thus preferably have and determine that precalculated position that clutch housing contacts with vibration-proof cover easily avoids the specifically labelled centrifugal clutch of vibration node position.
The present invention also provides motorcycle and other vehicles that any centrifugal clutch disclosed herein is housed.
In vehicle of the present invention,, can effectively suppress the abnormal sound that clutch produces by centrifugal clutch disclosed herein.
Description of drawings
Fig. 1 is the sectional view that perceives an example that is applicable to stepless speed variator of the present invention;
Fig. 2 illustrates the location of centrifugal hoof of the embodiment; Fig. 2 (B) is a front view, and Fig. 2 (A) is the sectional view along A-A line among Fig. 2 (B);
Fig. 3 illustrates the structure of an embodiment clutch housing, and wherein, the outside of cylindrical part is covered by a vibration-proof cover; Fig. 3 (A) is the front view of the clutch housing seen from base plate, and Fig. 3 (B) is the sectional view along B-B line among Fig. 3 (A);
Fig. 4 illustrates the structure of an embodiment vibration-proof cover; Fig. 4 (B) is a front view, and Fig. 4 (A) is the sectional view along A-A line among Fig. 4 (B);
Fig. 5 illustrates the structure of another embodiment's vibration-proof cover; Fig. 5 (B) is a front view, and Fig. 5 (A) is the sectional view along A-A line among Fig. 5 (B);
Fig. 6 (A) and Fig. 6 (B) perceive the vibration of difform clutch housing respectively;
Fig. 7 (A) and Fig. 7 (B) perceive the shape of the mitigation bent side of difform anti-vibration lid;
Fig. 8 perceives the anti-vibration lid on the outer surface of cylindrical part of the clutch housing that is fixed to (covering) embodiment;
Fig. 9 is the enlarged view of the major component of Fig. 8;
Figure 10 is the side view that an embodiment motorcycle is shown.
Reference character
2: driving shaft 3: driving pulley 4: driven shaft 5: driven pulley 6: band 6a: be with 7: movable belt wheel 8: fixed pulley 9: movable belt wheel 10: fixed pulley 11: centrifugal clutch 12: clutch housing 12a: cylindrical part 12b: base plate 13: centrifugal hoof 14: opening 15: quill shaft 16: retainer 17,77: vibration- proof cover 17a, 77a: sidepiece 17b, 77b: bottom 18: spring 19: axle bed 20: be used for the opening 21 of balanced rotation: spot welding position 22,23: protuberance 30: line contacting part 40: face contacting part 50: non-contact portion 100: motorcycle (pedal motorcycle) 101: front fork 102: front-wheel 103: steering handle 104: vehicle seat 105: stepless speed variator 106: engine assembly 107: trailing wheel c: the cylindrical part d of clutch housing: node e: abdomen
Embodiment
The preferred embodiments of the present invention are described below with reference to accompanying drawings.Yet this explanation all is exemplary and nonrestrictive from every side.Should be understood that and to make multiple change and distortion and do not depart from the scope of the present invention.
Figure 10 is the side view as the motorcycle (being a pedal motorcycle in the present embodiment) of the representative instance of the vehicle of the centrifugal clutch that present embodiment is housed.
As shown in figure 10, comprise on motorcycle 100 broad sense of present embodiment: the front fork 101 that on vehicle frame, pivots; Be connected the front-wheel 102 of front fork 101 lower ends; Be connected the steering handle 103 of front fork 101 upper ends; Be installed in the vehicle seat 104 on vehicle frame top; Be installed in the engine assembly 106 of vehicle seat 104 belows; Link to each other and the variable v-belt drive 105 of the centrifugal clutch of present embodiment is housed with engine assembly 106; And torque is delivered to trailing wheel 107 on it from stepless speed variator 105.
Except the following centrifugal clutch that will illustrate, the mechanism that is assembled on the motorcycle 100 of present embodiment is identical with the mechanism on the conventional motorcycle that is used in analog structure, therefore the detailed description of omitting conventional art herein.The present invention can be used to comprise the motorcycle of moped and pedal motorcycle ideally.Term used herein " motorcycle " also comprises can be by the vehicle that tilting of car body is turned.Therefore the vehicle that to have more than a front-wheel or trailing wheel and total wheel number be three or four (or more) also belongs to the category of term " motorcycle " used herein.
In addition, the present invention is not limited to the motorcycle described in the embodiment, and it also can be used in other vehicles of assembling centrifugal clutch.For example, except motorcycle, centrifugal clutch of the present invention also can be used on and comprises four-wheel go-anywhere vehicle (ATV: off highway vehicle) and in other saddle-ride type vehicles of snowmobile.Saddle-ride type vehicle comprises that widely shape is with the same or analogous vehicle of motorcycle.In addition, centrifugal clutch of the present invention also can be used for being equipped with the recreational vehicle (cart) or the racing car of motor or motor.
Fig. 1 is the sectional view of general configuration that the stepless speed variator of the centrifugal clutch that is equipped with present embodiment is shown.This stepless speed variator 1 is made up of driving pulley 3 that is connected to driving shaft 2 and the driven pulley 5 that is connected to driven shaft 4.Be with 6 across between driving pulley 3 and the driven pulley 5.Driving pulley 3 is made up of movable belt wheel 7 and fixed pulley 8.Driven pulley 5 is made up of movable belt wheel 9 and fixed pulley 10.Movable belt wheel 7 and 9 can slide along driving shaft 2 and driven shaft 4 respectively.On the other hand, fixed pulley 8 and 10 is fixed in axial position.The position of the band of representing with reference character 6 among Fig. 1 is in the band position of maximum deceleration during than (LOW).The position of the band of representing with reference character 6a is the band position of minimum deceleration during than (TOP).
As shown in Figure 1, the critical piece of the centrifugal clutch 11 of present embodiment is assembled on the driven shaft 4 that is equivalent to the such rotation axle.Centrifugal clutch 11 is made up of clutch housing 12 and the centrifugal hoof 13 that is arranged on the clutch housing 12 inboard same axles.Clutch housing 12 is made of the base plate 12b of cylindrical part 12a and covering cylindrical part 12a one end, and roughly is bowl-type usually.
The cylindrical part 12a internal surface of clutch housing 12 is the slidingsurfaces that contact with centrifugal hoof 13.In addition, the base plate 12b of clutch housing 12 is provided with a plurality of openings 14 to reduce weight.Opening 14 can be used as the positioning mark of present embodiment.
The work of centrifugal clutch 11 with said structure is as follows.
The rotation of driving pulley 3 is via being with 6 to be delivered to driven pulley 5.The rotation of driven pulley 5 is delivered on the retainer 16 of centrifugal hoof 13 via quill shaft 15 again, and centrifugal hoof 13 correspondingly rotates.Because the centrifugal force that produces during rotating, centrifugal hoof stretch out and contact the internal surface (slidingsurface) of the cylindrical part 12a of clutch housing, thereby make the clutch combination.As a result, clutch housing 12 rotate and with transmission of torque to driven shaft (such rotation axle) thus 4 make its rotation.
According to present embodiment (seeing Fig. 3 (A) and 3 (B)), the outside of clutch housing 12 is covered by vibration-proof cover 17.The cylindrical part 12a of clutch housing 12 is arranged to the inside press fit of itself and vibration-proof cover 17.
Fig. 2 illustrates the position of this embodiment's centrifugal hoof 13.Fig. 2 (B) is a front view, and Fig. 2 (A) is the sectional view along A-A line among Fig. 2 (B).
In this example, three centrifugal hoof 13 are fixed on the retainer 16 by spring 18.Spring 18 is in the front side (in the counterclockwise direction) of each centrifugal hoof 13 application of force.The structure of centrifugal hoof 13 can be identical with the structure of the centrifugal hoof of tradition, it does not added special feature among the present invention.
Fig. 3 illustrates the structure of clutch housing 12, and wherein, the outside of cylindrical part 12a is covered by vibration-proof cover 17.Fig. 3 (A) is the front view of the clutch housing 12 seen from base plate 12b, and Fig. 3 (B) is the sectional view along B-B line among Fig. 3 (A).
Shown in Fig. 3 (B), in the base plate 12b of bowl-type clutch housing 12, be formed centrally axle bed (boss) 19.Driven shaft 4 (see figure 1)s are fixed on this axle bed 19.In addition, base plate 12b equal intervals is formed with six openings 14 (therefore, winding the interval that has 60 degree corresponding to the driven shaft 4 of such rotation axle).The opening of the reference character 20 expression balanced rotation among the figure.Reference character 21 expression among the figure is fixed to vibration-proof cover 17 the spot welding position on the base plate 12b of clutch housing 12.
As shown in Figure 4 and Figure 5, form a plurality of protuberances 22 around interior all sides of vibration-proof cover 17.In the present embodiment, protuberance 22 is equal to the positioning mark corresponding to opening 14.
Fig. 4 illustrates the structure of the vibration-proof cover 17 that is used to cover clutch housing 12.Fig. 4 (B) is a front view, and Fig. 4 (A) is the sectional view along A-A line among Fig. 4 (B).
Shown in Fig. 4 (A), 4 (B), 3 (A) and 3 (B), vibration-proof cover 17 of the present invention is made up of cylindrical side portion 17a and circular bottom part 17b, and the size of described sidepiece can make the cylindrical part 12a press fit of clutch housing 12.
As shown in above-mentioned figure, totally 3 protuberances 22 form in 3 positions uniformly-spaced (promptly spending at interval with 120 around driven shaft 4) by pressure processing outstanding on the inner surface of the sidepiece 17a of vibration-proof cover 17 (therefore recessed from outer surface).
Fig. 5 illustrates the structure of another embodiment's vibration-proof cover 77.Fig. 5 (B) is a front view, and Fig. 5 (A) is the sectional view along A-A line among Fig. 5 (B).
Similar with the vibration-proof cover shown in Fig. 4, this embodiment's vibration-proof cover 77 is made up of cylindrical side portion 77a and circular bottom part 77b, the size of described sidepiece can make the cylindrical part 12a press fit of clutch housing 12, and the radius of described bottom is less than the radius of the bottom 17b of the vibration-proof cover shown in Fig. 4 17.Have 5 protuberances 23 and give prominence to (therefore recessed) by the pressure processing effect from the inner surface of the sidepiece 77a of the vibration-proof cover 77 of present embodiment from outer surface in 5 positions uniformly-spaced (promptly spending at interval with 72) around driven shaft 4.
Below explanation had the vibration-proof cover of said structure (shape) and the assembling of clutch housing.
At first, vibration-proof cover 17 and clutch housing 12 locates like this: make at least one position that is used as specifically labelled protuberance 22 much at one with at least one position that is used as specifically labelled opening 14.Particularly, as Fig. 3 and shown in Figure 8, the protuberance 22 of location positioning vibration-proof cover 17 that can be by reference opening 14 assembles vibration-proof cover 17.
Therefore, each protuberance 22 its corresponding opening 14 is positioned at much at one position on every side with respect to vibration-proof cover 17 internal surfaces.Vibration-proof cover 17 is fixed on the clutch housing 12 at the relative position place and covers clutch housing 12 (being that clutch housing 12 press fit are to the sidepiece 17a of vibration-proof cover 17).
According to the abovementioned embodiments of the present invention, can determine that in advance the cylindrical part 12a of clutch housing 12 goes up the node d of the vibration that produces and the position of abdomen e by various analytical methods.For example, described analytical method comprise vibration analysis based on finite element method, based on vibration analysis of laser scanning vibration measurement method (laser doppler vibration measuring method) etc.
Vibration analysis can adopt general routine analyzer to carry out, and this is not a feature of the present invention.Therefore will omit detailed description to vibration analysis.
Therefore, can be by determining the node d of vibration and the position (position) of abdomen e in advance based on the analytical method of the shape of clutch housing, material etc.Can form suitable positioning mark according to the position of determining then.
For example, in the cylindrical part 12a of the clutch housing with shape shown of present embodiment, as shown in Figure 6, according to vibration node d that calculates based on finite element method and the position of abdomen e, the position that can make the position of vibration abdomen e and opening 14 much at one.
Therefore, by on vibration-proof cover 17, at least two (having three herein) and the roughly the same protuberance 22 in opening 14 positions being set, the position of all protuberances 22 beyond the vibration node of the cylindrical part of clutch housing contacted with the cylindrical part 12a of clutch housing with respect to the position around the internal surface of vibration-proof cover 17.In other words, according to present embodiment, all contacting parts (being the contacting part of protuberance 22 with the cylindrical part 12a of clutch housing 12) are positioned at vibration abdomen place.
In addition, all the other protuberances 22 depart under the situation of abdomen position slightly in that the position of a protuberance 22 is identical with the position of the vibration abdomen e (see figure 6) of clutch housing, as long as at least one protuberance 22 be positioned at the abdomen position or around the abdomen position (promptly, even all protuberances 22 are not in the abdomen position), also can suppress vibration efficiently.
Shown in Fig. 7 (A) and 7 (B), it is the crooked to the inside shape (mitigation curved surface) of the imaginary circle center, that connect the protuberance protruding end but not perfect circular arc that sidepiece 17a, the 77a of vibration- proof cover 17,77 between protuberance 22,23 preferably forms in advance with the rotatingshaft.Perhaps, sidepiece 17a, 77a are preferred to be provided with like this: when the outside of the cylindrical part of clutch housing was covered, the shape variable of sidepiece 17a, 77a changed into the mitigation curved surface.The instantiation of this mitigation bent side 17a, 77a (the approximate polygonal that is) can be presented as: be approximately the leg-of-mutton circle that has as 3 protuberances 22 on summit shown in Fig. 7 (A); With shown in Fig. 7 (B), be approximately the pentagonal circle that has as 5 protuberances 23 on summit.
As Fig. 8 with as enlarged view shown in Figure 9 of a part among Fig. 8, by adopting such shape, formed the some contacting part, perhaps preferred line contacting part 30 between the outer surface of the cylindrical part 12a that makes at the protuberance 22 of the vibration-proof cover 17 of aforementioned location and clutch housing 12.In addition, online contacting part 30 forms the line contacting part around the both sides of this circle, perhaps preferred face contacting part 40, and the non-contact portion 50 that contacts with vibration-proof cover 17 and clutch housing 12 is not clipped between the two.Owing to by forming such line contacting part 30 and face contacting part 40 (other non-contact portion 50 is arranged betwixt) surface of contact is increased, has increased the shock absorption energy, and improved the inhibition effect of abnormal sound.
Desirable embodiment of the present invention more than has been described.But the present invention is not limited to the foregoing description, can make multiple other changes of the foregoing description and distortion and does not depart from scope of the present invention.
For example, have 3 or 5 protuberances with reference to the vibration-proof cover of description of drawings above.But to the not restriction of quantity of protuberance, for realizing effect of the present invention, protuberance can be 2,4,6 or more.In addition, according to embodiments of the invention, as long as vibration-isolating effect just can be realized in the contact position between vibration-proof cover and clutch housing.In other words, aforementioned protuberance can be arranged on any of vibration-proof cover or clutch housing or the two all is provided with.
In addition, positioning mark is not limited to any specific forms, shape or quantity.According to the foregoing description, adopt opening and protuberance as positioning mark.But positioning mark is not limited to this.For example, also can form specific projection or depression at the relative position of vibration-proof cover and clutch housing, or lines (slit).In addition, also can be marked with coating, pattern etc. on the surface of vibration-proof cover and clutch housing.
The invention of (1)～(4) below the invention described above provides.
(1) a kind of centrifugal clutch, it is by forming with the bottom:
Internal surface is as the cylindrical part of slidingsurface;
The bowl-type clutch housing of forming by the base plate that covers this cylindrical part one end;
Coaxial and torque is from clutch housing transmission rotatingshaft thereon with the cylindrical part of this clutch housing;
Because the rotation of this rotatingshaft and the centrifugal hoof that engages or separate with described clutch housing with described slidingsurface contact or separately the time; With
Cover the vibration-proof cover in the outside of described cylindrical part,
Wherein, on the base plate of described clutch housing, be formed with opening, and
On the internal surface of described vibration-proof cover, be formed with the protuberance of press fit to the outer surface of described cylindrical part.
(2) according to (1) blurred core type clutch, wherein said protuberance is positioned at the position roughly the same with described opening around described vibration-proof cover internal surface.
(3) according to (1) described centrifugal clutch, wherein the cylindrical side portion in described vibration-proof cover forms two protuberances at least, and the sidepiece between adjacent protuberance has from the aduncate arc of perfect circular arc.
(4) a kind of method of assembling centrifugal clutch, wherein clutch is made up of following part:
Internal surface is as the cylindrical part of slidingsurface;
The bowl-type clutch housing of forming by the base plate that covers this cylindrical part one end;
Coaxial and torque is from clutch housing transmission rotatingshaft thereon with the cylindrical part of this clutch housing;
Because the rotation of this rotatingshaft and the centrifugal hoof that engages or separate with described clutch housing with described slidingsurface contact or separately the time; With
Cover the vibration-proof cover in the outside of described cylindrical part,
This method may further comprise the steps:
Calculating rotate by described centrifugal hoof the node of vibration of cylindrical part of the described clutch housing that produces and abdomen the position and
Cover described clutch housing with described vibration-proof cover, make the position of protuberance beyond described node be in contact condition.
According to above-mentioned (1) described invention, the protuberance on the internal surface of the vibration-proof cover of covering clutch housing is in the external surface peripheral press fit of clutch housing.Therefore, the displacement owing to the vibration of clutch housing in radially generation is suppressed, thereby can effectively prevent the generation of abnormal sound.
In addition, according to above-mentioned (2) described invention, the position of the opening that forms on the base plate of clutch housing for loss of weight is identical with the position of vibration abdomen usually.Therefore, thereby be positioned near push down clutch housing these positions from the outside cylindrical part, can suppress the vibration of cylindrical part effectively, and prevent the generation of abnormal sound effectively by the protuberance that makes vibration-proof cover.
According to above-mentioned (3) described invention, vibration-proof cover contacts with clutch housing point by utilizing protuberance, and utilizes the circular arc part between the adjacent protuberance to contact with the clutch housing line, thereby the outer surface of contact clutch housing suppresses vibration in wide range.Therefore, by number of openings and position,, also can suppress to vibrate abdomen effectively even depart to some extent the position of abdomen.In addition, because above-mentioned surface of contact is very wide, has increased the shock absorption energy, and improved the inhibition effect of abnormal sound.
According to above-mentioned (4) described invention, by utilizing for example vibration node and the abdomen of the cylindrical part of finite element method calculating clutch housing, and cover clutch housing with vibration-proof cover and make and the position contact of protuberance beyond the node location of vibration-proof cover can effectively suppress the vibration of clutch housing.
Possible commercial Application
Except being assembled to centrifugal clutch on the vehicle, the present invention also can be used for various have with The frictional rotation device of the sliding members of the intermittent contact of cylinder inner surface and generation friction.
Claims (12)
1. centrifugal clutch comprises:
By internal surface as the cylindrical part of slidingsurface with cover the clutch housing that the base plate of this cylindrical part one end is formed;
Coaxial and torque is from clutch housing transmission rotatingshaft thereon with the cylindrical part of this clutch housing;
Because the rotation of this rotatingshaft and the centrifugal hoof that engages or separate with described clutch housing with described slidingsurface contact or separately the time; With
Cover the vibration-proof cover in the outside of described cylindrical part,
It is characterized in that, described clutch housing and described vibration-proof cover comprise: contacting part, non-contact portion and positioning mark, described contacting part and described non-contact portion arrange along the circumferencial direction of the cylindrical part of described clutch housing, at described contacting part, clutch housing and vibration-proof cover are in contact with one another, in described non-contact portion, clutch housing and vibration-proof cover are separated from each other, and described positioning mark determines that the relative position of clutch housing and vibration-proof cover is to prevent to produce abnormal sound.
2. centrifugal clutch according to claim 1 is characterized in that,
On the base plate of described clutch housing, be formed with opening, and
The position of the contacting part of described opening and described vibration-proof cover is predetermined.
3. centrifugal clutch according to claim 1 is characterized in that,
On the internal surface of described vibration-proof cover, be formed with the protuberance of press fit to the outer surface of described cylindrical part, and
The position of the contacting part of described protuberance and described clutch housing is predetermined.
4. centrifugal clutch according to claim 1 is characterized in that,
On the base plate of described clutch housing, be formed with opening,
On the internal surface of described vibration-proof cover, be formed with the protuberance of press fit to the outer surface of described cylindrical part, and
The position of described opening and described protuberance is predetermined.
5. centrifugal clutch according to claim 4 is characterized in that, described protuberance is positioned at and the corresponding in a circumferential direction position of described opening around the internal surface of described vibration-proof cover.
6. centrifugal clutch according to claim 3 is characterized in that,
Cylindrical side portion in described vibration-proof cover is formed with at least two protuberances, and
Sidepiece between adjacent protuberance has from the crooked inwardly shape of imaginary circle that with described rotatingshaft is the protruding terminus of center connection protuberance.
7. centrifugal clutch according to claim 1 is characterized in that, the contacting part of described clutch housing and the contacting part of described vibration-proof cover comprise the face contacting part that line contacting part that mutual line contacts contacts with face mutually respectively.
8. centrifugal clutch according to claim 7 is characterized in that, the contacting part of described clutch housing or the contacting part of described vibration-proof cover comprise the protuberance with the contacting part line contact of relative another.
9. centrifugal clutch comprises:
By internal surface as the cylindrical part of slidingsurface with cover the clutch housing that the base plate of this cylindrical part one end is formed;
Coaxial and torque is from clutch housing transmission rotatingshaft thereon with the cylindrical part of this clutch housing;
Because the rotation of this rotatingshaft and the centrifugal hoof that engages or separate with described clutch housing with described slidingsurface contact or separately the time; With
Cover the vibration-proof cover in the outside of described cylindrical part,
It is characterized in that, described vibration-proof cover comprises: at least two positions beyond the vibration node of the cylindrical part of described clutch housing contact the contacting part of described clutch housing, with the non-contact portion that does not contact and along the circumferential direction be arranged on the both sides of each contacting part with described clutch housing.
10. method of assembling centrifugal clutch, wherein this clutch comprises: by internal surface as the cylindrical part of slidingsurface with cover the clutch housing that the base plate of this cylindrical part one end is formed; Coaxial and torque is from clutch housing transmission rotatingshaft thereon with the cylindrical part of this clutch housing; Because the rotation of this rotatingshaft and the centrifugal hoof that engages or separate with described clutch housing with described slidingsurface contact or separately the time; With the vibration-proof cover in the outside that covers described cylindrical part, this method may further comprise the steps:
Thereby preparation has specifically labelled clutch housing and vibration-proof cover that the relative position that can determine clutch housing and vibration-proof cover prevents to produce abnormal sound;
Contacting part and clutch housing and the separated non-contact of vibration-proof cover portion that clutch housing and vibration-proof cover are in contact with one another are set at the predetermined relative positions place,
Wherein, the outside of the cylindrical part of described clutch housing is covered by described vibration-proof cover.
11. a method of assembling centrifugal clutch, wherein this clutch comprises: by internal surface as the cylindrical part of slidingsurface with cover the clutch housing that the base plate of this cylindrical part one end is formed; Coaxial and torque is from clutch housing transmission rotatingshaft thereon with the cylindrical part of this clutch housing; Because the rotation of this rotatingshaft and the centrifugal hoof that engages or separate with described clutch housing with described slidingsurface contact or separately the time; With the vibration-proof cover in the outside that covers described cylindrical part, this method may further comprise the steps:
Cover the outside of the cylindrical part of described clutch housing with described vibration-proof cover, make at least two positions of pre-determined contacting part beyond the vibration node position of the cylindrical part of this clutch housing with the cylindrical part contact of this clutch housing, and non-contact portion in the both sides of each contacting part along the circumferential direction with the cylindrical part of this clutch housing separately.
12. a vehicle is characterized in that, comprises each described centrifugal clutch in the claim 1～9.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004227198 | 2004-08-03 | ||
| JP227198/2004 | 2004-08-03 | ||
| JP216568/2005 | 2005-07-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1737396A CN1737396A (en) | 2006-02-22 |
| CN100373069C true CN100373069C (en) | 2008-03-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100981056A Active CN100373069C (en) | 2004-08-03 | 2005-08-03 | Centrifugal type clutch and its assembly method |
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| Country | Link |
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| CN (1) | CN100373069C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI527977B (en) * | 2010-01-27 | 2016-04-01 | Fcc Kk | Centrifugal clutch device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5664656A (en) * | 1996-08-13 | 1997-09-09 | Dyneer Corporation | Centrifugal clutch |
| JP3322015B2 (en) * | 1994-08-26 | 2002-09-09 | スズキ株式会社 | Housing vibration control structure of friction engagement device |
| CN1657798A (en) * | 2004-02-17 | 2005-08-24 | 本田技研工业株式会社 | Centrifugal clutch |
-
2005
- 2005-08-03 CN CNB2005100981056A patent/CN100373069C/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3322015B2 (en) * | 1994-08-26 | 2002-09-09 | スズキ株式会社 | Housing vibration control structure of friction engagement device |
| US5664656A (en) * | 1996-08-13 | 1997-09-09 | Dyneer Corporation | Centrifugal clutch |
| CN1657798A (en) * | 2004-02-17 | 2005-08-24 | 本田技研工业株式会社 | Centrifugal clutch |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1737396A (en) | 2006-02-22 |
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