KR20150048672A - Continuously variable transmission with variable radius pulley - Google Patents

Abstract

A continuously variable transmission according to a desirable embodiment of the present invention comprises: a power device, e.g., a drive shaft (1) for directly receiving the output of an engine; a drive pulley (10) combined with the outer circumference of the drive shaft (1); a driven shaft (2) which is spaced from the drive shaft (1) with an interval while being in parallel with the drive shaft (1); a driven pulley (20) combined with the outer circumference of the driven shaft (2); and a belt (30) wound between the drive pulley (10) and the driven pulley (20) to transmit power to the driven shaft (2). The radii of the pulleys are varied by reciprocating the pulleys (10, 20) in the direction of the axial line of the drive shaft (1) or the driven shaft (2) using actuators (140, 240) as means.

Description

[0001] Continuously variable transmission with variable radius pulley [0002]

The present invention relates to a continuously variable transmission provided with a variable radial poly.

For example, a transmission device for determining an appropriate reduction ratio in delivering an output of an engine for generating power from a vehicle to a driving wheel may be classified into a manual transmission, an automatic transmission, a continuously variable transmission, and the like.

In recent years, Continuously Variable Transmission (CVT) has come into the spotlight as a device capable of improving fuel efficiency and power performance by compensating for the disadvantages of an automatic transmission using hydraulic pressure. As is well known to those skilled in the art, the continuously variable transmission is a type in which an endless track type belt is connected to a pair of pulleys fixed to the input shaft and the output shaft, respectively, and the outer diameter of the belt is varied according to the movement of the pulley.

The continuously variable transmission (Patent Document 1) proposes that the moving shaft engaged with the reference shaft is moved in the longitudinal direction in accordance with the rotation of the reference shaft, and the radius of the pulley can be changed by linking the moving shaft and the sliding pin by means of a link have.

In the patent document 1, the moving shaft moves along the longitudinal direction of the reference shaft and simultaneously rotates clockwise or counterclockwise to concentrate the sliding pin in the center direction through the link to reduce the radius, To expand the radius.

Such a conventional technique is made up of a double structure of a moving shaft and a reference shaft, and the moving shaft is moved in the spiral direction through the helical spline, so that it is not easy to control the speed ratio accurately and quickly when the radius is varied.

Korean Patent Publication No. 10-2013-0090168

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a pulley which is capable of individually and rapidly varying the radii of the pulleys through simple shrinkage and / or expansion and contraction of the actuators provided on the driving side and the driven side, .

In order to achieve the above object, in a continuously variable transmission including a variable radial pulley according to a preferred embodiment of the present invention,

The drive shaft has a plurality of spline grooves formed in the longitudinal direction at equal intervals along the circumference,

Side pulley,

A drive side disk having a central shaft yoke and a plurality of sliding grooves formed in the radial direction in the shaft yoke and disposed orthogonally to the axial direction of the drive shaft,

A sleeve having a circular plate and a guide groove formed in the longitudinal direction of the bar support portion, the guide plate having a circular plate and a plurality of bus bar corresponding portions extending lengthwise inwardly from the edge of one side edge of the circular plate and passing through the slide groove,

A plurality of sliders slidably coupled to the slide groove and the guide groove and varying the turning radius of the belt,

And an actuator for assisting axial movement of the sleeve,

The driven shafts are provided with a plurality of spline grooves longitudinally formed at regular intervals along the circumference,

The driven pulleys are symmetrically arranged diagonally to the drive pulleys,

A driven side disk having a central shaft yoke and a plurality of sliding grooves formed in the radial direction of the shaft yoke and orthogonal to the axial direction of the slave shaft,

A sleeve having a circular plate and a guide groove formed in the longitudinal direction of the bar support portion, the guide plate having a circular plate and a plurality of bar-like portions extending inwardly from the edge of one side edge of the circular plate,

A plurality of sliders slidably coupled to the slide groove and the guide groove and varying the turning radius of the belt,

And an actuator for facilitating the axial movement of the sleeve,

And the drive side disk and the driven side disk are arranged side by side at a predetermined interval on the same plane.

The slider of the present invention includes a body portion having an inclined surface, a spacer projecting from an opposite surface center region facing the inclined surface, a arc portion protruding from the upper end of the body portion, a arc portion protruding from the lower end of the body portion, And guide grooves formed on both side surfaces of the guide grooves to engage with the slide grooves.

The slider may further include a locking protrusion on the inclined surface.

The inclination angle of the bus bar corresponding portion is inclined at the same angle as the inclined surface of the slider.

The drive shaft may be disposed coaxially with the center plate and the circular plate of the sleeve, and the follower axis may be disposed coaxially with the center line of the circular plate of the sleeve.

The spline groove, the slide groove, the bus bar corresponding portion, and the slider may be spaced at the same angle with respect to the axis center, and may have the same number.

The actuator can be coupled to the center of the other surface of the circular plate.

The present invention may further include a bearing between the actuating rod of the actuator and the circular plate.

The slider forms a hanging groove between the spacer and the arc portion for securing the belt.

The belt comprises two endless track belts, and a drive side disk and a driven side disk disposed on the same plane between the two belts can be interposed.

In order to improve the driving force between the drive shaft and the sleeve, the present invention includes a hollow portion having a grooved groove formed in the drive shaft, and a vertical rod disposed vertically on the circular plate of the sleeve correspondingly. The vertical bar forms a coupling protrusion around the inner circumferential surface.

Likewise, the present invention includes a hollow portion having a mating groove formed inside a driven shaft to improve the driving force between the driven shaft and the sleeve, and a vertical bar provided in the vertical direction on the circular plate of the sleeve correspondingly. The vertical bar forms a coupling protrusion around the inner circumferential surface.

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings.

Prior to that, terms and words used in the present specification and claims should not be construed in a conventional and dictionary sense, and the inventor may properly define the concept of the term in order to best explain its invention It should be construed as meaning and concept consistent with the technical idea of the present invention.

As described above, according to the present invention, the turning radius of the poly can be easily varied by simply using the linear reciprocating motion of the actuator.

Particularly, the present invention can ensure a reliable coupling state by engaging the respective constituent members.

The present invention can pursue ease of assembly and structural simplification by disposing the same driving side pulley and the driven side pulley symmetrically.

The present invention has a double belt structure and can efficiently transfer the rotational power of the belt from the input shaft (drive shaft) to the output shaft (slave shaft) without loss.

1 is an overall configuration diagram schematically showing a continuously variable transmission according to a preferred embodiment of the present invention.
2 is a cross-sectional view of the continuously variable transmission taken along the line AA in Fig.
3 is an exploded perspective view of the shaft and poly shown in Fig.
Fig. 4 is a cross-sectional view for confirming the state of engagement between the shaft corresponding portion of the poly and the shaft.
5 is a perspective view of the slider.
6 is a view for explaining a variable changing method of the slider mounted on the drive side poly-assembly.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately The present invention should be construed in accordance with the meaning and concept consistent with the technical idea of the present invention.

Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A continuously variable transmission having a variable radial poly according to a preferred embodiment of the present invention will now be described in detail with reference to the accompanying drawings.

FIGS. 1 to 3 are front views schematically showing a continuously variable transmission according to a preferred embodiment of the present invention. FIG. 1 shows the belt omitted in order to clearly show the constituent members.

The continuously variable transmission according to the preferred embodiment of the present invention shifts the rotational speed of the drive shaft 1, which is a power source, to the driven shaft 2 at an arbitrary rotational speed and, in particular, 20 of the truncated conical shape having the same shape and the same size as the driven shafts 2 are symmetrically coupled to each other in the diagonal direction. Therefore, specific drawings and explanations of the driven shaft 2 and the driven poly 20 are excluded.

The continuously variable transmission according to the preferred embodiment of the present invention includes a drive shaft 1 directly receiving an output generated from a power unit, for example, an engine side, a driven pulley 10 coupled to an outer periphery of the drive shaft 1, A driven pulley 20 and a driven pulley 20 which are coupled to the outer periphery of the driven shaft 2 and are spaced apart from each other at a predetermined distance in parallel with the drive shaft 1, And a belt (30) wound between the driven poles (20) and transmitting power to the slave shaft (2).

The drive shaft 1 is provided with a plurality of spline grooves 1a along the longitudinal direction of the drive shaft 1. The plurality of spline grooves 1a are arranged at regular intervals along the outer circumference of the drive shaft 1. [ In addition, the drive shaft 1 has the hollow portion 1b along the longitudinal direction in the central region of the free end. The inner circumferential surface of the hollow portion 1b may have a mating groove.

The drive side pulley 10 includes a drive side disk 110 disposed adjacent to the free end of the drive shaft 1 at right angles to the axial direction of the drive shaft 1 and a sleeve 120 ); A slider 130 slidably coupled to the drive side disk 110 and the sleeve 120 and an actuator 140 for adjusting the axial movement of the sleeve 120.

The drive side disk 110 has a disk shape having a constant thickness. The drive side disk 110 has a shaft hole 111 at the center and a plurality of slide grooves 112 formed in the radial direction from the center of the drive side disk 110. The slide groove 112 provides a path of movement of the slider 130. The slide grooves 112 are equally spaced in the radial direction around the shaft hole 111, and have the same number corresponding to the spline grooves 1a. The drive side disk 110 may be integrally formed at the free end of the drive shaft 1. For this purpose, the shaft hole 111 may have the same shape and the same size as the drive shaft 1.

The sleeve 120 of the driving side poly 10 is formed as a frusto conical shape generally by a sliding member movable in the axial direction of the driving shaft 1 in accordance with the driving of the actuator 140.

The sleeve 120 includes a circular plate 121 and a plurality of bus bar corresponding portions 122 spaced apart at equal intervals along one edge circumference of the circular plate 121. In order to reliably supply the rotational torque transmitted from the drive shaft to the sleeve, the sleeve 120 has a vertical bar 123 vertically arranged on the upper surface of the circular plate 121. The vertical bar may have a mating protrusion along the periphery of its circumference.

As shown in the figure, the bus bar corresponding portion 122 is a bar extending in a length corresponding to the bus bar of the cone, and a bar extending from one side edge of the circular plate 121 to the one- to be. It is preferable that the bus bar corresponding portion 122 has the same number (or the same angle) so that it can be engaged with the spline groove 1a of the drive shaft 1. [ The drive shaft 1 is arranged coaxially with the center line of the circular plate 121 of the sleeve 120.

The bus bar corresponding portion 122 forms a guide groove 122a along the longitudinal direction on the outer circumferential surface thereof, and the guide groove 122a can be formed in a cross-sectional shape while being selectable.

The free end of the bus bar supporting portion 122 is sized and shaped to engage with the spline groove 1a of the drive shaft 1 and to slide along the forming direction of the spline groove 1a. The free end of the bus bar corresponding portion 122 must be engaged with the spline groove 1a so as to be able to transmit the rotational power of the drive shaft 1 to the belt 30 which is wound around the driving pulley 10 as described above. For this purpose, the free ends of the bus bar support portions 122 are spaced apart from each other as shown in FIG. 3, which should be the same as the spacing of the spline grooves 1a.

The slider 130 is slidably mounted in the slide groove 112 of the drive side disk 110 and the guide groove 122a of the sleeve 120 to provide a change in the radius of the drive side poly 10, The slider 130 is configured to wind the endless belt 30 or the chain so that the belt can be rotated at an arbitrary rotation ratio by arbitrarily adjusting the radius of rotation of the belt.

The driving side pulley 10 includes an actuator 140 at the center of the other side of the circular plate 121. The actuator 140 applying an external force to the center of the circular plate prevents the sleeve 120 from tilting during operation, thereby uniformly providing an external force across the sleeve 120 to smoothly move the slide. The sleeve 120 can be replaced with a ring-shaped portion (not shown) instead of the circular plate 121. [

The actuator 140 controls the length of the actuating rod 141 through expansion or contraction of the actuating rod 141 and controls the axial movement of the driving shaft pulley 10 through the control of the length of the actuating rod 141 . Here, the actuator 140 is commercially available, and an electric actuator, a hydraulic actuator, a pneumatic actuator, or the like can be used.

The actuator 140 may further include a bearing at the other surface coupling portion between the operation rod 141 and the circular plate 121 so as not to affect the rotation of the circular plate 121 due to the rotation of the drive shaft 1. [ have.

The present invention is configured to provide a change in the radius of the slider 130 through the axial movement of the drive shaft pulley 10 relative to the drive shaft 1. That is, 120 to adjust the radial distance of the slider 130 to perform a transmission function.

In the present invention, a pulley that rotates in response to a rotational force from an engine is referred to as a drive side pulley 10, while a pulley interlocking with a drive side pulley 10 via a belt 30 is divided into a driven side pulley 20 Named. As shown, it can be seen that the drive side pulley 10 and the driven pulley 20 have the same structure, and this distinction is simply based on the functional distinction of the pulley.

The driven shaft 2 is provided with a plurality of spline grooves 2a along the longitudinal direction of the driven shaft 2. The plurality of spline grooves 2a are arranged at regular intervals along the outer circumference of the driven shaft 2. In addition, the driven shaft 2 has the hollow portion 2b along the longitudinal direction in the central region of the free end. The inner circumferential surface of the hollow portion 2b may have a latching groove.

The driven side pulley 20 includes a driven side disk 210 fixedly coupled to the free end of the driven shaft 2, a sleeve 220 having a generally truncated conical shape; A slider 230 slidably coupled to the driven side disk 210 and the sleeve 220 and an actuator 240 for adjusting the axial movement of the sleeve 220.

The driven side disk 210 has a disk shape having a constant thickness. The driven side disk 210 has a shaft hole 211 in the center portion and a plurality of slide grooves 212 formed in the radial direction from the center of the driven side disk 210. The slide groove 212 provides a path of movement of the slider 230. The slide grooves 212 are equally spaced along the axial hole 211 and have the same number corresponding to the spline grooves 2a.

Sleeve 220 of driven side poly 20 is generally frusto-conically shaped as a component that is slidably movable in the axial direction of subordinate shaft 2 in accordance with the drive of actuator 240.

The sleeve 220 includes a circular plate 221 and a plurality of bus bar corresponding portions 222 spaced apart from each other around the circumference of one side of the circular plate 221. The sleeve 220 has a vertical bar 223 vertically arranged on the upper surface of the circular plate 221 in order to reliably supply the rotary torque transmitted from the driven poly toward the driven shaft 2. [ The vertical bar may have a mating protrusion along the periphery of its circumference.

As shown in the figure, the bus bar corresponding portion 222 is a bar extending in a length corresponding to the bus bar of the cone and extending obliquely toward the one-sided center line of the circular plate 221 at one side edge of the circular plate 221. It is preferable that the bus bar corresponding portion 222 has the same number as the spline groove 2a of the driven shaft 2. And the driven shaft 2 is arranged coaxially with the center line of the circular plate 221 of the sleeve 220.

The bus bar corresponding portion 222 forms a guide groove 222a along the longitudinal direction on the outer circumferential surface thereof, and the guide groove 222a can be formed in a cross-sectional shape in a selectable manner.

The free end of the bus bar supporting portion 122 is sized and shaped to engage with the spline groove 2a of the driven shaft 2 and to slide along the forming direction of the spline groove 2a. The free end of the bus bar corresponding portion 222 is inserted into the spline groove 2a of the driven shaft 2 and the rotary power interlocked with the belt 3 can be transmitted to the driven side pulley 20 as described above.

The slider 230 is slidably mounted in the slide groove 212 of the driven side disc 210 and the guide groove 222a of the sleeve 220 to provide a change in the radius of the trailing side poly 20, The slider 230 is provided with an endless track type belt 30 or a chain so that the belt can be rotated at an arbitrary rotation ratio by arbitrarily adjusting the radius of rotation of the belt.

The driven side pulley 20 has an actuator 240 at the center of the other side of the circular plate 221. The actuator 240 controls the length of the actuating rod 241 through expansion or contraction of the actuating rod 241 and controls the axial movement of the driven shaft pulley 20 through the control of the length of the actuating rod 241 do.

The actuator 240 may further include a bearing at the other surface coupling portion between the operating rod 241 and the circular plate 221 so as not to affect the rotation of the circular plate 221 by the rotational power transmitted to the belt 30. [ .

The present invention is characterized in that the drive-side disk 110 and the driven-side disk 210 are arranged in the same plane (same or the same) so as not to twist the belt 30 in order to ensure reliable interlocking of the drive-side pulley 10 and the follower- (I.e., level) at a predetermined interval. Further, the present invention arranges two belts 30 in parallel so as to realize a more stable shifting even at high-speed rotation, in which one belt 30 is disposed on one side of the disks 110 and 210, To be placed on the other side of the disks 120 and 220.

Fig. 4 is a cross-sectional view of the free end corresponding to the bus bar of the poly and a cross-sectional view of the shaft.

The drive shaft 1 is provided with a spline groove 1a so as to be spaced apart at equal intervals along the outer periphery of the drive shaft 1 and a free end of the bus- Engage. This ensures that the free end of the bus bar support portion 122 is slid along the spline groove 1a of the drive shaft 1 and at the same time the bus bar corresponding portion 122 of the drive- So that the belt 30 can be rotated.

5 is a perspective view of the slider. It is to be noted in advance that the slider 130 applied to the driving pulley and the slider 230 applied to the driven pulley have the same configuration.

The slider 130 includes a body 131 having an inclined surface 135 and a spacer 132 protruding in a direction orthogonal to an opposite surface center region facing the inclined surface 135 of the body 131, Shaped portion 133 protruding in a direction orthogonal to the upper end of the opposing face of the body portion 131 and a circular portion 134 projecting in a direction orthogonal to the lower face of the opposite face of the body portion 131. The slider 130 forms a concave ledge groove 136 in a spaced space between the spacer 132 and the arcuate portion 134 and a concave ledge groove 137 also exists between the spacer 132 and the arcuate portion 133. [ . The ledge grooves (136, 137) provide a space for fastening the belt (30).

The slider 130 forms a guide groove 130a along both sides of the body portion 131 and the spacer 132. The guide groove 130a is engaged with the slide groove edge portion of the drive side and the follower side disk, 0.0 > 112 < / RTI > The guide groove 130a is formed to be equal to or slightly larger than the thickness of the disk 110 and the spacer 130 has to be thicker than the thickness of the disk 110. [ Therefore, the toe grooves 136 and 137 are spaced apart from the surface of the disk 110 to prevent the belt 30 from contacting the disk directly, thereby ensuring the efficiency and durability of power transmission, and the noise and abrasion . This means that the sliders 130, 230 are not separated from the drive side and / or the driven side discs 110, 210.

The slider 130 forms a locking protrusion 135a on the inclined surface 135 and the locking protrusion 135a is slidably coupled to the guide groove 122a of the bus bar corresponding portion 122. [ The engaging jaw 135a has a cross-sectional shape and size that can be engaged in the guide groove 122a. Particularly, the inclined surface 135 of the slider 130 is inclined at the same angle as the inclination angle of the bus bar corresponding portion 122, so that the inclined surface of the slider 130 is brought into contact with the outer peripheral surface of the bus bar corresponding portion 122. The outline of the inclined surface of the slider 130 can be selected in the same manner as the outline of the outer circumferential surface of the bus bar corresponding portion 122 facing the inclined surface,

6, the shift function can be realized by changing the radius of the belt relative to the driven pulley in relation to the radius of the slider provided in the driven pulley and the driven pulley, respectively. In other words, in the continuously variable transmission according to the present invention, by only moving the driving side pulley and the driven side pulley coupled to the drive shaft and the driven shaft in the respective axial directions, the rotation of the driving side pulley and the middle side side pulley The number can be adjusted.

Fig. 6 (a) shows a plurality of sliders 130 arranged adjacent to the center of the shaft for adjusting the minimum turning radius of the belt 30 which is wound around the driving-side pulley 10. Fig. As shown in the figure, the slider 130 (see FIG. 3) includes four sliders. However, the present invention is not limited to this, and one or more sliders may be provided in correspondence with the slide grooves formed at regular intervals.

Side pulley 10 connected to the actuating rod 141 by contracting the actuating rod 141 of the actuator 140 if the plurality of sliders 130 are to maintain the minimum diameter to reduce the diameter of the driving- The slider 130 slidably coupled to the slide groove 112 and the guide groove 122a is forcibly moved in the axial direction as the sleeve 120 of the slide member 10 is retracted. As a result, this causes the turning radius of the belt 30 to be reduced.

As shown in Fig. 6 (b), in order to extend the diameter of the driving-side pulley 10, the actuating rod 141 of the actuator 140 is simply extended.

As described above, the present invention can easily and smoothly vary the diameter of each of the pulleys 10, 20 by actuating the actuators 140, 240 connected to the drive side and / or driven side poly 10, 20, respectively .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the same is by way of illustration and example only and is not to be construed as limiting the present invention. It will be apparent to those skilled in the art that modifications and improvements can be made thereto.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

1, 2 ----- axis,
10, 20 ----- pulleys,
30 ----- belt,
110, 210 ----- disk,
120, 220 ----- Sleeve,
130, 230 ----- slider,
140, 240 ----- Actuator.

Claims (12)

A drive side pulley 10 for providing the rotational power of the drive shaft 1 and a driven side pulley 20 for receiving power from the drive side pulley 10, a driven shaft 2 coupled to the driven shaft pulley 20, ) And a belt (30) for transmitting power between the drive side pulley (10) and the driven side pulley (20). The continuously variable transmission
The drive shaft (1) has a plurality of spline grooves (1a) longitudinally formed at regular intervals along a circumference,
The drive-side pulley (10)
A driving side disk 110 having a central shaft hole 111 and a plurality of sliding grooves 112 formed in the shaft hole 111 in the radial direction and arranged orthogonal to the axial direction of the driving shaft 1;
And a plurality of bus bar corresponding parts (122) extending inwardly inwardly from one side edge of the circular plate (121) and passing through the slide groove (112) and engaging with the spline groove (1a) A sleeve 120 having guide grooves 122a formed in the longitudinal direction of the bus bar corresponding portion 122,
A plurality of sliders 130 slidably coupled to the slide groove 112 and the guide groove 122a and varying the rotation radius of the belt 30,
And an actuator 140 for facilitating axial movement of the sleeve 120,
The follower shaft 2 has a plurality of spline grooves 2a formed longitudinally at regular intervals along a circumference,
The driven pulley 20 is disposed symmetrically with the driven pulley 20,
A driven side disk (210) having a central shaft hole (211) and a plurality of slide grooves (212) formed in the shaft hole (211) in a radial direction and arranged orthogonal to the axial direction of the driven shaft (2)
And a plurality of busbar corresponding parts 222 extending inwardly slanting inward from one edge edge of the circular plate 221 and one side edge of the circular plate 221 to be engaged with the spline groove 2a through the slide groove 212, A sleeve 220 having a guide groove 222a formed in the longitudinal direction of the bus bar corresponding portion 222,
A plurality of sliders 230 slidably coupled to the slide groove 212 and the guide groove 222a and varying the rotation radius of the belt 30,
And an actuator (240) for facilitating axial movement of the sleeve (220)
Wherein the drive side disk (110) and the driven side disk (210) are arranged side by side at a predetermined interval on the same plane.
The method according to claim 1,
The slider 130,
A plurality of protrusions 132 and 232 protruding from an opposite surface center region opposite to the inclined surfaces 135 and 235 and arc portions 133 and 233 protruding from the upper ends of the body portions 131 and 231, A guide groove 130a formed at both sides of the body portion 131 and 231 and the spacers 132 and 232 to engage with the slide grooves 112 and 212, , 230a). ≪ / RTI >
The method of claim 2,
Characterized in that the sliders (130, 230) further include hooks (135a, 235a) on the slopes (135, 235).
The method of claim 3,
Wherein the inclination angle of the bus bar corresponding portion is inclined at the same angle as the inclined surface of the slider.
The method according to claim 1,
The drive shaft 1 is disposed coaxially with the center line of the circular plate 121 of the sleeve 120,
Wherein the middle shaft (2) is disposed coaxially with the center line of the circular plate (221) of the sleeve (220).
The method according to claim 1,
Wherein the spline grooves (1a, 2a), the slide grooves (112, 212), the bus bar corresponding portions (122, 222), and the sliders (130, 230) are the same number.
The method according to claim 1,
And the actuators (140, 240) are coupled to the center of the other surface of the circular plates (121, 221).
The method of claim 7,
Wherein bearings are additionally provided between the actuating rods (141, 240) of the actuators (140, 240) and the circular plates (121, 221).
The method of claim 2,
Wherein the slider forms a flange groove between the spacer and the arc-shaped portion for winding the belt therebetween.
The method according to claim 1,
Characterized in that the belt (30) is made up of two endless track belts, and the drive side disk (110) and the driven side disk (210) are arranged on the same plane between the two belts Transmission.
The method according to claim 1,
The drive shaft (1) has a hollow portion (1b) inside the drive shaft,
, And the driven shaft (2) has a hollow portion (2b) inside the middle shaft.
The method according to claim 1,
Wherein the sleeves (120, 220) further include vertical bars (123, 223) extending in the vertical direction in the circular plates (121, 221).

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