CN1355387A

CN1355387A - Engaging and disengaging gear of belt buncher

Info

Publication number: CN1355387A
Application number: CN01134911A
Authority: CN
Inventors: 西川真一郎; 谷口竜也
Original assignee: Bando Chemical Industries Ltd
Current assignee: Bando Chemical Industries Ltd
Priority date: 2000-11-24
Filing date: 2001-11-13
Publication date: 2002-06-26
Anticipated expiration: 2021-11-13
Also published as: KR20020040564A; TW505755B; JP2002161956A; CN1202363C

Abstract

Disclosed is a clutch device of a belt-typed non-stage transmission. A rotating cam connecting with a movable sheave of a driving pulley constituting the pulley for speed-changing in a belt-typed non-stage transmission in the manner of rotating with each other and moving toward each other in axis, so that it may change the speed by allowing the movable sheave to approach or depart from a stationary sheave during the allowable rotation of the rotating cam. In addition, a clutch may become a releasing condition resulted from the rotating toward a clutch-release position OFF of the rotating cam and subsequently the movable sheave being maximally departed from the stationary sheave, so that the power transmission between the driving pulley and a belt can be disconnected and an engaging roller is pivotally supported on the outer peripheral portion of a stationary cam located on the back side of the movable sheave. On the other hand, an engaging pin is provided on the rotating cam, and the engaging pin may engage with the engaging roller during the rotating toward the clutch-release position OFF of the rotating cam and subsequently the movable sheave being departed from the stationary sheave to become the releasing condition, thereby it can minimize the clutch device, facilitate the assembling and maintaining thereof, and further truly obtain the secure releasing condition.

Description

The engaging and disengaging gear of variable v-belt drive

Technical field

The present invention relates to the engaging and disengaging gear of variable v-belt drive.

Background technique

Known in the past as this variable v-belt drive, be provided with the speed pulley of forming by fixed pulley and movable pulley, wherein said fixing belt wheel one is rotated and can not be fixed in slidably on the running shaft, be arranged on the running shaft to above-mentioned movable pulley face-off, make it and fixed pulley between form V word shape trough of belt, and one rotation and supported slidably, simultaneously, in the trough of belt of this speed pulley, be wound with the variable velocity zone of forming by V-belt, the back side one side in the movable pulley of speed pulley is provided with the cam mechanism of being made up of rotating cam and stationary cam, by of the relative rotation of this rotating cam with respect to stationary cam, the movable pulley of speed pulley is axially moved, this speed pulley of switch, thereby the effective radius that can change with respect to variable velocity zone carries out speed change (for example, opening flat 3-79845 communique with reference to the spy).

In addition, in this variable v-belt drive, the movable pulley of speed pulley is roughly isolated above slewing range with respect to fixed pulley the biglyyest, thereby the tension force of variable velocity zone is zero, can cut off the transmission of power (clutch off state) between this variable velocity zone and the speed pulley.Therefore, by adopting this structure, engaging and disengaging gear can be set.

Thereby, a known example as this engaging and disengaging gear, in the past bottom the trough of belt between fixed pulley and movable pulley, compression is equipped with and is used for the pressure spring of edge away from the close movable pulley of direction of fixed pulley, tensile-elasticity by this spring, in the clutch off state, keep movable pulley roughly to leave the state of fixed pulley the biglyyest.

But, in above-mentioned structure in the past,, therefore in order to hold this pressure spring, axial space must be arranged, because this holding space makes engaging and disengaging gear be difficult to become compact structure owing to be provided with pressure spring in the trough of belt bottom of speed pulley.

In addition, the pressure spring that is contained in above-mentioned speed pulley trough of belt bottom is easy to damage, and because of this spring damages the ill occasion of running that causes engaging and disengaging gear, must dismantle the whole speed changer that comprises engaging and disengaging gear, thereby maintenance is poor.And because same reason, the assembling engaging and disengaging gear needs the time, thereby also has the problem of assembling performance difference.

But also have following problems, and because the elastic force by spring moves movable pulley, switch to the clutch off state, therefore be difficult to reliably and stably carry out switching to this clutch off state, the switching that occurs the clutch off state easily is bad.

Summary of the invention

The objective of the invention is to, the structure of the engaging and disengaging gear by improving above-mentioned variable v-belt drive realizes improving the compactness of this engaging and disengaging gear assembling performance and maintenance simultaneously, and can obtain stable clutch off state really.

To achieve these goals, in the present invention, when the movable pulley of speed pulley becomes the clutch off state away from fixed pulley, make with this movable pulley axially one move the rotary component that is connected and fixed body cooperates, by both cooperations, movable pulley is remained on position away from fixed pulley forcibly.

That is to say, among the present invention, engaging and disengaging gear with variable v-belt drive is an object, be provided with the speed pulley that the fixed pulley that is supported on the running shaft and movable pulley are formed, be wound on the variable velocity zone in the trough of belt between these speed pulley two belt wheels, and can rotate relatively and axially one be connected movably on the above-mentioned movable pulley, around running shaft rotation and make movable pulley with respect to fixed pulley approaching or away from rotary component, by the rotation of this rotary component in slewing range, make above-mentioned movable pulley approaching or away from carrying out speed change with respect to fixed pulley, on the other hand, by making rotary component rotate to clutch off position in abutting connection with this slewing range by above-mentioned slewing range, make movable pulley roughly the biglyyest away from fixed pulley, and become the clutch off state of cutting off transmission of power between speed pulley and the variable velocity zone.

In addition, also be provided with the engaging part on the fixed body that is arranged on above-mentioned movable pulley back side, and be arranged on the above-mentioned rotary component, when rotary component rotates to the clutch off position by above-mentioned slewing range, by with the cooperating of above-mentioned engaging part, make movable pulley become the component of clutch off state away from fixed pulley.

According to said structure, in the present invention, by the rotation of rotary component in slewing range, the movable pulley of speed pulley with respect to fixed pulley approaching or away from, change the tape wrapping footpath of this speed pulley, carry out speed change.In addition, when switching to the clutch off state by this speed change state, above-mentioned rotary component is rotated to the clutch off position of its adjacency by above-mentioned slewing range.So, the component of this rotary component cooperates with the engaging part of movable pulley back side fixed body, by both cooperations, movable pulley is switched the clutch off state that is retained to transmission of power between cut-out speed pulley and the variable velocity zone roughly the biglyyest away from fixed pulley.

This occasion, because above-mentioned engaging part is arranged on the fixed body of movable pulley back side, component is arranged on the rotary component that connects movable pulley in addition, therefore the axle direction space that is used to hold spring in the time of pressure spring maintenance clutch off state need not being set in the trough of belt bottom of two belt wheels can make speed changer and engaging and disengaging gear compact structure.

In addition,, therefore under the situation, the whole speed changer that comprises engaging and disengaging gear needn't be dismantled unusually the time etc., maintenance can be improved because above-mentioned engaging part and component are arranged on the outside of speed changer.In addition, it is also easy to assemble, thereby can improve assembling performance.

And, because the mechanical engagement by engaging part and component makes movable pulley away from fixed pulley forcibly, therefore, can be really and stably carry out switching to the clutch off state, realize the stabilization that engaging and disengaging gear turns round.

Preferred construction is that above-mentioned rotary component becomes rotating cam, on the other hand, fixed body becomes the stationary cam that contacts with above-mentioned rotating cam cam, on this rotating cam or stationary cam one, form shift cam face with given inclined at inclination angles, on the other hand, the contacting part contact with above-mentioned shift cam face is set on another, by the relative rotation of rotating cam with stationary cam, make movable pulley with respect to fixed pulley approaching or away from.

According to this configuration, when rotating cam relatively rotates in slewing range with respect to stationary cam, the movable pulley of speed pulley with respect to fixed pulley approaching or away from, change the tape wrapping footpath, carry out speed change.When rotating cam rotated to the clutch off position relatively by slewing range, the component of rotating cam cooperated with the engaging part of stationary cam, and by both cooperations, movable pulley is roughly the biglyyest away from fixed pulley, and switching is retained to the clutch off state.Therefore, this occasion also can access effect and the effect same with above-mentioned situation.

In addition, also can make in above-mentioned engaging part or the component at least one become roller.According to this configuration, engaging part can successfully be carried out with cooperating of component, can more stably carry out keeping to the switching of clutch off state.

In addition, preferably, the band that carries variable velocity zone under the clutch off state rotatably is set carries roller in the fixed pulley and the bottom of the trough of belt between the movable pulley of above-mentioned speed pulley.Therefore, in the clutch off state, the movable pulley of speed pulley is during roughly the biglyyest away from fixed pulley, and the band that variable velocity zone carries in the trough of belt bottom carries on the roller, can cut off the transmission of power between speed pulley and the variable velocity zone really.

Description of drawings

Fig. 1 is the plan view of the stepless speed variator speed change state of the expression embodiment of the invention.

Fig. 2 is the sectional view of expression stepless speed variator speed change state.

Fig. 3 is the view corresponding to Fig. 1 of expression stepless speed variator clutch off state.

Fig. 4 is the view corresponding to Fig. 2 of expression stepless speed variator clutch off state.

Embodiment

Below, based on accompanying drawing, be that embodiment describes with best instantiation of the present invention.Fig. 1～Fig. 4 has represented the variable v-belt drive A of the embodiment of the invention, 1 is the rotary driving axle, this rotary driving axle 1 is made up of axle main body 2 and the outer integratedly cylindric sleeve 3 that is embedded on this main body 2, and this sleeve 3 (rotary driving axle 1) upper support is by the drive pulley of being made up of speed pulley 5.

Above-mentioned drive pulley 5 is made up of the fixed pulley 6 of flange plate-like and the movable pulley 7 of flange plate-like, these fixed pulley 6 one are rotated and can not be combined in slidably on the sleeve 3 of rotary driving axle 1, this movable pulley 7 by hub portion 7a slidably and can be supported on the relative rotation on the sleeve 3 of rotary driving axle 1 makes it and fixed pulley 6 face-offs.Between these two

belt wheels

6,7, form trough of belt 8, in this trough of belt 8, be wound with V-belt 10 as variable velocity zone.

In addition, above-mentioned V-belt 10 also is wound on the driven pulley on the outer driven running shaft of figure, the movable pulley 7 that makes drive pulley 5 with respect to fixed pulley 6 near or away from, thereby change the tape wrapping footpath of drive pulley 5, for example, make movable pulley 7 near fixed pulley 6, when closing drive pulley 5, the tape wrapping footpath of drive pulley 5 is greater than driven pulley, thereby make the rotation speedup of rotary driving axle 1, become the fast state that is passed to driven running shaft (driven pulley), on the other hand, otherwise, when the movable pulley 7 of drive pulley 5 is opened away from fixed pulley 6, the tape wrapping of drive pulley 5 footpath is less than driven pulley, thereby makes the rotational delay of rotary driving axle 1, becomes the lower-speed state that is passed to driven running shaft (driven pulley).

On the above-mentioned rotary driving axle 1, in the back side (downside of Fig. 2 and Fig. 4) of the movable pulley 7 of drive pulley 5, be provided be used to make this movable pulley 7 with respect to fixed pulley 6 near or away from cam mechanism 12.This cam mechanism 12 is provided with the rotating cam 13 as rotary component, and this rotating cam 13 is being connected the hub portion 7a of movable pulley 7 around rotary driving axle 1 rotation and the outer movably chimeric supported state of one axially relatively by bearing 14.At rotating cam 13 and end faces drive pulley 5 opposite sides, upper-lower position at the above-mentioned bearing 14 radial directions outside and equal angles spaced apart in the circumferential direction interval (180 ° of intervals), give prominence to respectively a pair of circular-arc cam part 13a is set, 13a, at this cam part 13a, the front end of 13a forms the

shift cam face

15,15 with the given angle inclination.In addition, be provided with swingle 16 in that the periphery one of rotating cam 13 is outstanding rotatably,, can make rotating cam 13 rotations by operation with respect to this swingle 16.

In addition, in the axle main body 2 of above-mentioned rotary driving axle 1, in the part that is positioned at rotating cam 13 back side (with respect to the opposite side of rotating cam 13 and drive pulley 5), can be supported with ring-type stationary cam 18 with the relative rotation as fixed body by bearing 19.Peripheral part at this stationary cam 18, the position corresponding with each shift cam face 15 of above-mentioned rotating cam 13, be provided with pair of cams roller 20 as the contacting part that contacts with these each camming surface 25 cams, 20, this each tappet roller 20 rotatably is supported on the outer circumferential face of stationary cam 18 by the bolt shape back shaft 21 that extends along radial direction.In addition, formed mounting arm 22 at the peripheral part of stationary cam 18, this mounting arm 22 is provided with mounting hole 23 at front end, and the mounting hole 23 by mounting arm 22 does not does not install and fix stationary cam 18 on the outer housing of figure etc. revolvably.

In addition, as depicted in figs. 1 and 2, make the rotating cam 13 of above-mentioned cam mechanism 12, in Fig. 1 and shown in Figure 3 to the slewing range of high speed position HI, rotating around rotary driving axle 1 (the hub portion 7a of movable pulley 7) by low-speed position LO, on its each shift cam face 15, rotate by the tappet roller 20 that makes stationary cam 18 respectively, the movable pulley 7 of drive pulley 5 is axially moved, with respect to fixed pulley 6 near or away from, change the effective radius of its trough of belt 8, it is the tape wrapping footpath in the drive pulley 5, make the belt pulley ratio between drive pulley 5 and the driven pulley, the speed ratio that is speed changer A changes, on the other hand, as shown in Figure 3 and Figure 4, by rotating cam 13 is rotated in abutting connection with the clutch off position OFF of this slewing range low-speed position LO side by above-mentioned slewing range, make movable pulley 7 the biglyyest away from fixed pulley 6, become the clutch off state of cutting off transmission of power between drive pulley 5 and the V-belt 10.

And, at the peripheral part of said fixing cam 18, the different position with above-mentioned

tappet roller

20,20, the outstanding roller shaft 26 that extends along the radial direction of stationary cam 18 that is provided with is supported with the engaging roller 27 as engaging part free to rotately on this roller shaft 26.

In addition, at above-mentioned rotating cam 13 and end faces drive pulley 5 opposite sides (face that shift cam face 15 is arranged),, install and fix base end part integratedly as the fitting pin 29 of component by bolt 28 in the position different with shift cam face 15,15.This fitting pin 29 extends along the direction that is parallel to running shaft 1 in stationary cam 18 sides (side opposite with drive pulley 5), front end is to the radial direction inboard of rotating cam 13 (running shaft 1 side) bending, in this bending the inside (face relative) of front end with rotating cam 13 form fitting surface 30, this fitting surface 30 can be with respect to the engaging roller 27 of said fixing cam 18 peripheries, the rotating cam 13 that engages roller 27 with this cooperates at the peripheral part of opposition side, when rotating cam 13 rotates to clutch off position OFF by above-mentioned slewing range, as shown in Figure 3 and Figure 4, the fitting surface 30 of fitting pin 29 front ends is cooperated with the rotating cam 13 that engages roller 27, make it to carry peripheral part at opposition side, by this fitting pin 29 and the cooperation that engages roller 27, movable pulley 7 is axially moved, away from fixed pulley 6, become the clutch off state.

In addition, on the 8 bottom corresponding driving running shafts 1 of the trough of belt between said fixing belt wheel 6 and the movable pulley 7, can be rotatably set in the band that carries V-belt 10 under the clutch off state by bearing 32 and carry roller 31.

The following describes the running of the foregoing description.When the rotating cam 13 of the cam mechanism 12 of stepless speed variator A was in slewing range between low-speed position LO and the high speed position HI, engaging and disengaging gear was in the clutch connected state, carries out transmission of power between rotary driving axle 1 and drive pulley 5 and V-belt 10.Thereby by the rotation of above-mentioned rotating cam 13 in slewing range, the speed ratio of stepless speed variator A changes.

That is to say, under this speed change state, by the rotation of rotating cam 13 between low-speed position LO and high speed position HI, the tappet roller 20 of stationary cam 18 rotates on each shift cam face 15 respectively, like this, the movable pulley 7 of drive pulley 5 axially moves, with respect to fixed pulley 6 near or away from, thereby change the effective radius of its trough of belt 8, be the tape wrapping footpath on the drive pulley 5, the belt pulley between change drive pulley 5 and the driven pulley is than (speed ratio of speed changer A).

Specifically, when rotating cam 13 was positioned at high speed position HI, the movable pulley 7 of drive pulley 5 was near fixed pulley 6, drive pulley 5 closures, and its tape wrapping footpath is greater than driven pulley.Make the rotation speedup of rotary driving axle 1 like this, become the fast state that is passed to driven running shaft (driven pulley).On the other hand, when rotating cam 13 is positioned at low-speed position LO, the movable pulley 7 of drive pulley 5 is away from fixed pulley 6, drive pulley 5 is opened, its tape wrapping footpath is less than driven pulley, make the rotational delay of rotary driving axle 1, become the lower-speed state that is passed to driven running shaft (driven pulley).

Relative therewith, become the clutch off state of engaging and disengaging gear by this speed change state (power delivery status), when cutting off the transmission of power of drive pulley 5 (rotary driving axle 1) and V-belt 10, the rotating cam 13 of above-mentioned cam mechanism 12 is rotated to the opposition side of high speed position HI and along clockwise direction among Fig. 1 by the low-speed position LO of slewing range again, is positioned at the clutch off position OFF in abutting connection with low-speed position LO.So, in case rotating cam 13 rotates to clutch off position OFF by slewing range, as shown in Figure 3 and Figure 4, be mounted on the fitting surface 30 of fitting pin 29 front ends on the rotating cam 13, engaging roller 27 with respect to stationary cam 18 peripheries engages cooperating with rotating cam 13 of roller 27 with this, make it to be carried by the peripheral part of opposition side.Along with this cooperation, by fitting pin 29 to the engaging roller 27, be stationary cam 18 sides (downside of Fig. 2 and Fig. 4) tractive rotating cams 13 axially, this rotating cam 13 also drives by bearing 14 movable pulley 7 of the drive pulley 5 that connects movably of one axially, make it away from fixed pulley 6, two

belt wheels

6,7 are isolated the biglyyest, and drive pulley 5 is all opened, and remains on the clutch off state.

So, under this clutch off state,, thereby be in that the V-belt 10 in the trough of belt 8 falls into the bottom of this trough of belt 8 between two

belt wheels

6,7, and ride over the band that is in these trough of belt 8 bottoms and carry on the roller 31 because fixed pulley 6 isolates with movable pulley 7 the biglyyest.Thus, can cut off transmission of power between drive pulley 5 (rotary driving axle 1) and the V-belt 10 really.

Therefore, in the present embodiment, above-mentioned engaging roller 27 is supported in the peripheral part of the stationary cam 18 of cam mechanism 12 by axle, fitting pin 29 is mounted on the rotating cam 13, therefore need can not make speed changer A and engaging and disengaging gear compact structure for the axle direction space that is used to hold spring, the trough of belt bottom that pressure spring is contained in drive pulley two belt wheels with the structure in the past that keeps the clutch off state.

In addition and since above-mentioned engaging roller 27 and fitting pin 29 all be arranged at speed changer A around the outside, therefore check when speed changer A is unusual etc. or when adjusting, not dismantling engaging and disengaging gear and speed changer A also can carry out, and can improve its maintenance.And the assembling of engaging and disengaging gear and speed changer A also becomes easily, can improve its assembling performance.

And, clutch off state at above-mentioned engaging and disengaging gear, by the mechanical engagement of engaging roller 27 with fitting pin 29, pressure makes the movable pulley 7 of drive pulley 5 away from fixed pulley 6, therefore can be really and stably carry out switching to this clutch off state, realize the stabilization of engaging and disengaging gear running.

And the component that cooperates with above-mentioned fitting pin 29 is engage roller 27, thereby both cooperations can successfully carry out, and can more stably carry out the switching maintenance to the clutch off state.

In addition, in the above-described embodiments, engaging roller 27 is arranged on the stationary cam 18, fitting pin 29 is arranged on the rotating cam 13 in addition, but, otherwise also can become by the roller that is that is arranged on the rotating cam 13, be arranged at the common components on the stationary cam 18, perhaps also can become the parts that the two is roller or is non-roller for non-roller composition.

In addition, in the above-described embodiments, as variable v-belt drive A, example a driven for opening and closing belt pulley 5 carry out the type of speed change, but it is self-evident, the present invention also can be applicable to the belt speed changer of following structure, is about to each fixed pulley and the movable pulley configuration mutually of the drive pulley and the driven pulley of speed pulley composition with asking in reply, and the movable pulley of each belt pulley is driven by the cam mechanism by the linking mechanism interlock respectively.

Claims

1, a kind of engaging and disengaging gear of variable v-belt drive is provided with:

Be supported on the speed pulley that fixed pulley on the running shaft and movable pulley are formed;

Be wound in the variable velocity zone in the trough of belt between two belt wheels of above-mentioned speed pulley;

Can rotate relatively and axially one be connected in movably on the above-mentioned movable pulley, around running shaft rotation make movable pulley with respect to fixed pulley approaching or away from rotary component,

By making the rotation of above-mentioned rotary component in slewing range, above-mentioned movable pulley is approaching or away from carrying out speed change with respect to fixed pulley, on the other hand, by making rotary component rotate to clutch off position in abutting connection with this slewing range by above-mentioned slewing range, make movable pulley roughly the biglyyest away from fixed pulley, become the clutch off state of cutting off transmission of power between speed pulley and the variable velocity zone, it is characterized in that, also be provided with:

Be arranged at the engaging part on the fixed body of above-mentioned movable pulley back side;

Be arranged on the above-mentioned rotary component, when rotary component rotates to the clutch off position by above-mentioned slewing range, by with the cooperating of above-mentioned engaging part, make movable pulley become the component of clutch off state away from fixed pulley.

2, the engaging and disengaging gear of variable v-belt drive as claimed in claim 1, it is characterized in that, described rotary component is a rotating cam, on the other hand, fixed body is the stationary cam that contacts with above-mentioned rotating cam cam, on above-mentioned rotating cam or stationary cam one, formation is with the shift cam face of given inclined at inclination angles, on the other hand, on another, be provided with the contacting part that contacts with above-mentioned shift cam face, by the relative rotation of rotating cam with stationary cam, make movable pulley with respect to fixed pulley approaching or away from.

3, the engaging and disengaging gear of variable v-belt drive as claimed in claim 1 is characterized in that, at least one in described engaging part or the component is made up of roller.

4, the engaging and disengaging gear of variable v-belt drive as claimed in claim 2 is characterized in that, at least one in described engaging part or the component is made up of roller.

5, as the engaging and disengaging gear of any described variable v-belt drive in the claim 1～4, it is characterized in that, fixed pulley and the bottom of the trough of belt between the movable pulley at speed pulley rotatably are provided with the band that carries variable velocity zone under the clutch off state and carry roller.