JP3172282B2 - Pulley type transmission - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention comprises a pair of variable pulleys and a belt member wound around the two pulleys.
The present invention relates to an improvement of a pulley type transmission in which a gear ratio is changed by changing a pulley diameter of each pulley.

[0002]

2. Description of the Related Art Conventionally, in agricultural machines and the like, a pulley type transmission using a belt transmission has been frequently used to transmit the power of an engine to driving wheels or various working devices by changing the power of the engine. As an example of a pulley type transmission using this belt transmission, 1
A V-shaped belt groove is formed between each of the pair of rotating shafts, a fixed sheave that is fixed to the respective rotating shafts integrally and non-slidably, and a movable sheave on each shaft. A shift pulley comprising a movable sheave slidably supported oppositely arranged is provided, and a belt member is wound between belt grooves of both shift pulleys, and the movable sheave of each shift pulley is moved in the axial direction. A variable-speed pulley type in which the transmission ratio between the two rotating shafts is variably controlled by changing the effective radius of the transmission belt wound around the belt groove between the two sheaves by coming and going with the fixed sheave is well known. ing.

For example, in Japanese Utility Model Publication No. 48-14131, as a mechanism for moving the movable sheave of each speed change pulley in the axial direction, a speed adjusting bracket is provided on the rear side of the movable sheave via a thrust bearing. By connecting the movable bracket and connecting the movable brackets of both pulleys with wires and rotating the movable bracket relative to the fixed bracket, the movable bracket is movable by the cam action of the ball rolling on the cam surface. It is designed to be moved in the axial direction together with the sheave.

[0004]

However, in the above-mentioned prior art, a speed adjusting bracket having a cam function is provided on the back side of each movable sheave, and if the transmission is heavier by the speed adjusting bracket. It is inevitable that it is difficult to reduce the weight of the transmission.

[0005] Further, since a speed adjusting bracket is required, the number of parts is increased, and there is a problem that the cost is high.

The present invention has been made in view of the above-mentioned points, and an object of the present invention is to use a structure in which the movable sheaves of both speed change pulleys are interlocked with each other by using a wire as in the above-described conventional example, and then the wire is connected to the movable sheave. By improving the connection structure,
An object of the present invention is to reduce the size, weight, and cost of a transmission.

[0007]

In order to achieve this object, according to the first or second aspect of the present invention, two pairs of a wire member and a wire case into which the wire member is slidably inserted are used, and a relative movement between these two members is provided. The movable sheaves of the two speed change pulleys are cooperatively moved in the axial direction by utilizing the above.

Specifically, according to the first aspect of the present invention, a pair of rotating shafts arranged in parallel with each other, a fixed sheave each fixed to the rotating shaft integrally and non-slidably, and A movable sheave supported slidably in the axial direction on the rotating shaft so as to face the fixed sheave, and the facing directions of the fixed sheaves with respect to the movable sheaves are opposite to each other;
A pair of shift pulleys and a belt member wound between the two shift pulleys are provided, and the movable sheave of each shift pulley is moved toward and away from an opposing fixed sheave to change the effective radius of each pulley with respect to the transmission belt. Thus, a pulley type transmission in which the speed ratio between the two rotating shafts is variable is premised.

Then, a first portion is provided on the support portion and on both sides of the support portion.
And a fixed body having a second mounting portion, and a first swinging portion supported by a supporting portion of the fixed body so as to be swingable and swinging on one side of a fulcrum so as to come into contact with and separate from the first mounting portion. While having
On the other side of the fulcrum, there is provided a swinging member having a second swinging portion swinging so as to come into contact with and separate from the second swinging portion with respect to the first swinging portion.

The fixed sheave and the movable sheave of each of the speed change pulleys are provided with a fixed sheave side and a movable sheave side connecting member which are connected to the fixed sheave and the movable sheave via a bearing so as to be integrally rotatable and relatively rotatable, respectively.

Further, one end is connected to the movable sheave side connecting member of the one speed change pulley from one end side of the rotating shaft, and the other end penetrates through the first mounting portion of the fixed body. A first wire member connected to the first swinging portion, and one end connected to the fixed sheave-side connecting member of the one speed change pulley from one end side of the rotating shaft, and the other end connected to the first fixed member of the fixed body; And a flexible first tube-shaped wire case which is slidably inserted into the first wire member and connected to the first wire member.

Also, one end is connected to the fixed sheave side connecting member of the other transmission pulley from one end side of the rotating shaft, and the other end penetrates through the second swing portion of the swing member. A second wire member connected to the second mounting portion, and one end connected to the movable sheave side connecting member of the other speed change pulley from one end side of the rotary shaft, and the other end connected to the second member of the swing member. A flexible tube-shaped second wire case, which is connected to the swinging portion and slidably penetrates the second wire member therein, and wherein both swing pulleys are movable by swinging of the swinging member. The sheaves are configured to move in the axial direction in cooperation with each other.

According to a second aspect of the present invention, in the pulley type transmission having the same premise as the first aspect of the present invention, the fixed body having the first and second mounting portions arranged to face each other at a predetermined interval. And a moving member that is disposed between the first and second mounting portions of the fixed body and has a moving portion that moves so as to come into contact with and separate from the two mounting portions.
A fixed sheave-side and a movable sheave-side connecting member are connected to the fixed sheave and the movable sheave of each transmission pulley via a bearing so as to move integrally in the axial direction and to be relatively rotatable.

One end is connected to the movable sheave-side connecting member of the one speed change pulley from one end of the rotating shaft, and the other end penetrates through the first mounting portion of the fixed body to move the moving member. A first wire member connected to the portion, one end of which is connected to the fixed sheave side connecting member of the one speed change pulley from one end of the rotating shaft, and the other end is connected to a first mounting portion of the fixed body. And a flexible tubular first wire case through which the first wire member is slidably inserted.

Further, one end is connected to the movable sheave-side connecting member of the other speed change pulley from the other end of the rotary shaft, and the other end penetrates through the second mounting portion of the fixed body. A second wire member connected to the moving portion, and one end connected to the fixed sheave-side connecting member of the other speed change pulley from the other end of the rotary shaft, and the other end connected to the second mounting portion of the fixed body. A flexible tube-shaped second wire case that is slidably inserted through the second wire member, and the movable sheaves of the two speed-change pulleys are linked to each other by movement of the moving member, and It is configured to move in the direction.

According to the third aspect of the present invention, each of the rotating shafts is hollow, and the connecting member is fitted into the hollow rotating shaft, and the outer peripheral portion is connected to the fixed and movable sheaves via bearings. Configuration.

[0017]

According to the above construction, in the first aspect of the present invention, the fixed sheave side connecting member of one of the speed change pulleys and the first mounting portion of the fixed body are connected by the first wire case, and the movable portion of the one speed change pulley is movable. The sheave side connection member is connected to the first swing portion of the swing member through a first wire member which is guided through the first wire case, and the movable sheave side connection member is provided with a bearing via a bearing. When the gear ratio between the two rotating shafts is switched, the first wire member slides inside the first wire case and relatively moves with the swinging member. The movable sheave of one of the speed change pulleys moves in the axial direction and moves toward and away from the fixed sheave.

Further, the fixed sheave-side connecting member of the other transmission pulley and the second mounting portion of the fixed body are connected by a second wire member, and the movable sheave-side connecting member of the other transmission pulley is connected to the swing member. The second swing member is connected to the second swing member via a second wire case that guides the second wire member through,
Since the movable sheave is connected to the movable sheave side connecting member via a bearing, when the second swinging portion swings in the opposite direction to the first swinging portion by swinging of the swinging member,
The second wire case slides the second wire member inside and moves in the longitudinal direction relatively to the second wire member, whereby the movable sheave of the other transmission pulley moves in the axial direction and contacts the fixed sheave. Separated. As a result, the movable sheave of the other pulley comes and comes in contact with and separates from the fixed sheave in the direction opposite to the moving / separating direction of the movable sheave of the one transmission pulley, that is, the movable sheave of each transmission pulley comes in contact with the fixed sheave in the opposite direction. The effective radius of each pulley with respect to the power transmission belt changes,
Therefore, the gear ratio between the two rotating shafts can be changed.

At this time, the wire member and the wire case are connected to each of the fixed and movable sheave side connecting members, and the movable sheave is directly moved in the axial direction by moving in the length direction. No metal fittings required
It is possible to reduce the weight of the transmission.

When the movable sheave of one pulley approaches the fixed sheave as described above, each wire member and each wire case are moved to the fixed body and the swing member so that the movable sheave of the other pulley is separated from the fixed sheave. Since the movable sheaves are connected, the position of each movable sheave in the axial direction can be maintained, and the belt thrust generated by each speed change pulley can be canceled each other to reduce the operating force at the time of speed change.

Further, since the movable sheave is directly moved in the axial direction by the wire member and the wire case, the number of parts is reduced, the size of the apparatus is reduced, and the cost is reduced, as compared with the case of using a conventional speed adjusting bracket. Can be achieved.

According to the second aspect of the present invention, the fixed sheave side connecting member of one of the speed change pulleys and the first mounting portion of the fixed body are connected by the first wire case, and the movable sheave side connecting member of the one speed change pulley is The first of the moving parts of the moving member
Since it is connected via the first wire member guided to the wire case, when the moving portion of the moving member is moved between the two mounting portions of the fixed body, the first wire member is moved to the first position.
While sliding inside the wire case, the movable sheave of the one speed change pulley moves in the axial direction and moves toward and away from the fixed sheave while relatively sliding in the wire case.

Further, the fixed sheave-side connecting member of the other transmission pulley and the second mounting portion of the fixed body are connected via a second wire case, and the movable sheave-side connecting member of the other transmission pulley is the moving member. The second wire member is connected to the moving portion by the second wire member guided by the second wire case, so that the movement of the moving member causes the second wire member to be in a push-pull state opposite to the first wire member. As a result, the movable sheave of the other transmission pulley moves in the axial direction and moves toward and away from the fixed sheave while sliding inside the second wire case while moving in the longitudinal direction relatively thereto. As a result, the movable sheave of each speed-change pulley comes in contact with and separates from the fixed sheave in the opposite direction, so that the effective radius of each pulley with respect to the power transmission belt changes, and the speed ratio between both rotating shafts can be changed.
Therefore, the same effect as that of the first aspect can be obtained in this invention.

According to the third aspect of the present invention, each of the fixed sheave side and the movable sheave side connecting members is inserted into the hollow rotary shaft, and the outer peripheral portions thereof are connected to the fixed and movable sheaves via bearings. Therefore, the bearings and the connecting members can be downsized, and the weight of the transmission can be further reduced accordingly. In addition, the bearing diameter can be reduced to reduce the rotational resistance,
The transmission efficiency of the transmission can be improved.

Further, since the wire member and the wire case are connected to the connecting member located at the center position of the fixed and movable sheaves, the fixed and movable sheaves can be easily moved in the axial direction. In addition, since the connecting member and the bearing are housed in the rotating shaft, the appearance of the device can be improved.

[0026]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIGS. 1 and 2 show the overall configuration of a pulley type transmission A according to Embodiment 1 of the present invention. This transmission A is a small transmission for transmitting relatively small power. Used as a device. In both figures, 1 is a hollow drive shaft as one rotation shaft, 2 is a hollow driven shaft as the other rotation shaft, and a drive-side transmission shaft 3 is provided at the left end of the drive shaft 1 in FIG. The end of the driven shaft 2 is rotatably and integrally fitted to the end of the driven shaft 2 in FIG. 1 so that the drive and driven shafts 1 and 2 are arranged parallel to each other. Each end is supported by the transmission shafts 3 and 4.

The drive shaft 1 is provided with a drive pulley 5. The drive pulley 5 includes a flange-shaped fixed sheave 6 located on the opposite side of the drive shaft 1 from the drive-side transmission shaft 3 (right side in FIG. 1), and a flange-shaped movable sheave 7 located on the drive-side transmission shaft 3 side. Consists of The fixed sheave 6 is rotationally integrated and non-slidably fixed by a plurality (for example, four) of pins 8, 8,... Arranged at equal intervals in the circumferential direction on the drive shaft 1 in the boss portion 6a. On the other hand, movable sheave 7
Are a plurality of slots 1a, 1a,
Are slidably and integrally rotatably coupled to the drive shaft 1 at the boss portion 7a so as to face the fixed sheave 6 by pins 9, 9, ... respectively inserted between the sheaves 6, 7. Is formed with a belt groove 10 having a substantially V-shaped cross section.

On the other hand, the driven pulley 11
Is provided. The driven pulley 11 has a configuration similar to that of the driving pulley 5, and is configured such that the driven side transmission shaft 4
Flange-shaped fixed sheave 12 located on the side (left side in FIG. 1)
And a flange-shaped movable sheave 13 located on the opposite side to the driven transmission shaft 4. The fixed sheave 12 includes the driven shaft 2
Are fixed integrally and non-slidably by a plurality of pins 14 at a boss portion 12a.
3 is a plurality of elongated holes 2a, 2 in the driven shaft 2 in the axial direction.
The pins 15, 15,... respectively inserted through the movable sheaves 12 of the drive pulley 5 on the drive shaft 1 are opposed to the fixed sheaves 6 by the pins 15, 15,. Boss 1 on driven shaft 2
A belt groove 16 having a substantially V-shaped cross section is formed between the sheaves 12 and 13 so as to be slidable and rotatable integrally at 3a.

The belt groove 10 of the driving pulley 5
Belt V between the belt groove 16 of the driven pulley 11 and
The movable sheaves 7 and 13 of the driving and driven pulleys 5 and 11 are respectively moved toward and away from the fixed sheaves 6 and 12 so that the pulley diameter of each of the pulleys 5 and 11 (effective radius with respect to the V belt B) is adjusted. ) To change. For example, as shown by an imaginary line in FIG. 1, when the movable sheave 7 of the driving pulley 5 approaches the fixed sheave 6 and the movable sheave 13 of the driven pulley 11 is separated from the fixed sheave 12, the pulley of the driving pulley 5 By making the diameter larger than that of the driven pulley 11, the rotation of the drive shaft 1 is transmitted to the driven shaft 2 at an increased speed. On the other hand, when the movable sheave 7 of the drive pulley 5 is separated from the fixed sheave 6 and the movable sheave 13 of the driven pulley 11 is moved closer to the fixed sheave 12, as shown by a solid line in FIG. Reduce the pulley diameter of 5,
By increasing the diameter of the driven pulley 11, the rotation of the drive shaft 1 is reduced and transmitted to the driven shaft 2.

The drive shaft 1 accommodates fixed sheave side and movable sheave side connecting members 17 and 20, respectively. The fixed sheave side connecting member 17 has one through hole 1 at the center.
The outer race of the bearing 19 fixes the boss 6 a of the fixed sheave 6 to the drive shaft 1. Multiple pins 8 for
The fixed sheave side connecting member 17 is non-movably connected to the inner end of the fixed sheave 6 (drive shaft 1) via the bearing 19 so as to be immovable and relatively rotatable in the axial direction. It is connected to.

The movable sheave-side connecting member 20 is a ring-shaped member having a screw hole 21 at the center, and an inner race of a bearing 22 is externally immovably fitted to an outer peripheral portion thereof. Are fixedly connected to the inner ends of a plurality of pins 9, 9,... For fixing the boss 7a of the movable sheave 7 to the drive shaft 1. With this structure, the movable sheave side connecting member 20 is The movable sheave 7 is connected to the movable sheave 7 via a bearing 22 so as to be immovable in the axial direction and relatively rotatable.

On the other hand, fixed sheave side and movable sheave side connecting members 23 and 26 are accommodated in the driven shaft 2 respectively. The fixed sheave-side connecting member 23 is the same as the movable sheave-side connecting member 20 of the drive pulley 5 and has a screw hole 24, and an inner race of a bearing 25 is externally immovably fitted to the outer peripheral portion thereof, The outer race of the bearing 25 is immovably connected to the inner ends of a plurality of pins 14, 14,... For fixing the boss portion 12a of the fixed sheave 12 to the driven shaft 2. The side connecting member 23 is connected via a bearing 25 to the fixed sheave 12 (the driven shaft 2) so as to be axially immovable and relatively rotatable.

The movable sheave side connecting member 26 has one through hole 27 at the center similarly to the fixed sheave side connecting member 17 of the drive pulley 5, and an inner race of a bearing 28 is provided on an outer peripheral portion thereof. The outer race of the bearing 28 is immovably fitted with a plurality of pins 1 for fixing the boss 13 a of the movable sheave 13 to the driven shaft 2.
The movable sheave-side connecting member 26 is connected to the movable sheave 13 via a bearing 28 so as to be immovable in the axial direction and relatively rotatable.

Further, the driving and driven pulleys 5, 11
A speed changeover mechanism 31 is provided for moving the movable sheaves 7 and 13 in the axial direction in opposite directions. That is,
On one side of the input / output shaft 1.2, a housing 32 of the transmission A, which constitutes a fixed body according to the present invention, is disposed. The housing 32 includes a support portion 34 protruding from a housing body 33, First and second mounting portions 35 and 36 are formed on the both sides of the support portion 34 and project from the housing body 33 in directions perpendicular to the support portion 34 in opposite directions. A stepped through-hole 37 having a portion corresponding to the projecting side of the support portion 34 smaller in diameter than the opposite side has an engaging portion 38 on the surface of the second mounting portion 36 corresponding to the projecting side of the support portion 34. Each is provided.

An operation lever 39 as a swing member which is operated to swing between a low speed position (Lo) and a high speed position (Hi) is mounted on the support portion 34 by a support shaft 46 at both mounting portions of the housing 32. The operation lever 39 is supported swingably along a plane including 35 and 36.
a is provided. On the distal end side of the support shaft 46 which is a swing fulcrum of the operation lever 39, the operation lever 39 is provided.
Swinging operation of the first mounting portion 35 of the housing 32
A first swinging portion 40 swinging so as to come in contact with and separate from the fulcrum is provided on the base end side, which is the other side of the fulcrum.
On the other hand, second swing portions 41 which swing so as to approach and separate from the first swing portion 40 in opposition to each other are formed. An engaging portion 43 is provided on a surface of the first swinging portion 40 facing the first mounting portion 35, and a step is formed on the second swinging portion 41 such that a portion on the second mounting portion 36 side has a smaller diameter than the opposite side. The through-holes 45 are formed respectively, and the distance between the engaging portion 43 and the through-hole 45 from the support shaft 46 (fulcrum) is substantially the same.

The first wire case 4 through which a first wire member 49 to be described later is slidably inserted into a through hole 18 of the fixed sheave side connecting member 17 in the drive pulley 5.
One end of the drive shaft 8 is fitted and fixed from one end of the drive shaft 1 (the right end in FIG. 1). The first wire case 48 extends toward the housing 32, and the other end is the first wire case 48.
The fitting portion 35 is fitted and fixed to a large diameter portion of the through hole 37.

The first wire case 48 has two tube portions 48a, 4 made of metal whose one ends are fitted into the through holes 18, 37 of the connecting member 17 and the housing 32, respectively.
8a and a flexible portion 48b for connecting the other ends of the tube portions 48a, 48a to each other. The flexible portion 48b is formed by, for example, coating the outer surface of a thin metal wire spirally wound without any gap with a resin. In this portion, the wire case 48 has flexibility as a whole.

The first wire member 4 is inserted into the screw hole 21 of the movable sheave side connecting member 20 of the drive pulley 5.
A bolt 50 having one end fixed at 9 so that it cannot move is screwed and fastened. The first wire member 49 extends toward the housing 32 through the through hole 18 of the fixed sheave-side connecting member 17 and the inside of the first wire case 48, and a locking piece 51 is integrally attached to the other end. The locking piece 51 passes through the through hole 37 of the first mounting portion 35 of the housing 32 and engages with the engaging portion 4 of the first swing portion 40 at the tip of the operation lever 39.
3 is integrally engaged with the movable member 3.

On the other hand, a second wire case 5 through which a second wire member 53 described later is slidably inserted into a through hole 27 of the movable sheave side connecting member 26 of the driven pulley 11.
One end of the driven shaft 2 is fitted and fixed from one end of the driven shaft 2 (the right end in FIG. 1). The second wire case 52 is connected to the first wire case 52.
It is similar to the wire case 48 and extends to the housing 32 side, and the other end is the second swinging portion 41 at the base end side of the operation lever 39.
Are fitted and fixed to the large-diameter portion of the through hole 45.

The screw hole 24 of the fixed sheave side connecting member 23 of the driven pulley 11 is provided with a second wire member 53.
A bolt 54 having one end fixed immovably is screwed and fastened. The second wire member 53 extends toward the housing 32 through the through-hole 27 of the movable sheave-side connecting member 26 and the inside of the second wire case 52, and has a locking piece 55 at the other end.
The locking piece 55 is immovably engaged with the engaging portion 38 of the second mounting portion 36 of the housing 32 through the through hole 45 of the operation lever 39. Then, the operation lever 39 is moved to the high speed or low speed position (Hi
) And (Lo), the first wire member 49 is slidably guided by the first wire case 48 and the second wire case 52 is slidably guided by the second wire member 53. Movable sheaves 7, 13 of pulleys 5, 11
When the operation lever 39 is positioned at the low speed position (Lo) as shown by a solid line in FIG. 1, the first wire member 49 is pushed to move the movable sheave 7 of the driving pulley 5. The movable sheave 13 of the driven pulley 11 is moved closer to the fixed sheave 12 by separating from the fixed sheave 6 and pressing the second wire case 52, so that the pulley diameter of the drive pulley 5 is smaller than that of the driven pulley 11, and the rotation of the drive shaft 1 is performed. When the operating lever 39 is positioned at the high speed position (Hi), as shown by the imaginary line in FIG. 1, the first wire member 49 is pulled to move the movable sheave of the drive pulley 5. 7 is moved closer to the fixed sheave 6 and the second wire case 52 is also pulled to separate the movable sheave 13 of the driven pulley 11 from the fixed sheave 12 so that the pulley diameter of the driving pulley 5 is reduced. It is made larger than the driven pulley 11 so that the rotation of the drive shaft 1 is transmitted to the driven shaft 2 at an increased speed.

As shown in FIG. 2, the driving force of the driving pulley 5 of the pair of spans of the belt B stretched between the driving and driven pulleys 5 and 11 is provided between the driving and driven pulleys 5 and 11. A thrust generating mechanism 5 that generates a belt thrust by applying a tension to the belt B by pressing a loose side span (span on the left side in FIG. 2) when transmitted to the driven pulley 11 from its inner surface.
7 are provided. The thrust generating mechanism 57 includes an arm 5 swingably supported by a shaft 58 on the housing 32.
9 and a roller 61 rotatably supported by a shaft 60 at the distal end of the arm 59. The arm 59 is arranged such that the roller 61 presses the inner surface of the loose side span of the belt B by a spring (not shown) in FIG. And is urged to rotate clockwise.

Next, the operation of the transmission A of the above embodiment will be described. To reduce the rotation of the drive shaft 1 to a low speed state in which the rotation is transmitted to the driven shaft 2, the operation lever 39 of the speed changeover mechanism 31 is positioned at the low speed position (Lo). Since the first swing portion 40 at the distal end side of the operating lever 39 is connected to the movable sheave side connecting member 20 of the drive pulley 5 via the first wire member 49 inserted through the first wire case 48, With the switching operation to the low-speed position (Lo), the first wire member 49 is pushed in the longitudinal direction, and the first wire member 49 pivots the movable sheave side connecting member 20 while being guided by the first wire case 48. Move in the direction
The movable sheave 7 connected to the movable sheave side connecting member 20 via the bearing 22 and the pins 9, 9,... Moves leftward in FIG. As a result, the driving pulley 5 is opened and the diameter of the pulley decreases, and the V-belt B can move toward the driven pulley 11 due to the reduction in the pulley diameter.

The second swinging portion 41 on the proximal end side of the operating lever 39 is connected to the movable sheave side connecting member 26 of the driven pulley 11 via the second wire case 52 through which the second wire member 53 is inserted. In response to the switching operation of the operation lever 39 to the low speed position (Lo), the second operation is performed.
The wire case 52 is also pushed in the length direction, and the second wire case 52 moves the movable sheave side connecting member 26 in the axial direction while being guided by the internal second wire member 53, and the movable sheave side connecting member 26 Bearing 28 and pin 1
The movable sheave 13 connected via 5, 15,... Moves to the left in FIG. As a result, the driven pulley 11 closes, the diameter of the pulley increases, and the V-belt B is drawn to the driven pulley 11 side.
As a result, the pulley diameter of the driving pulley 5 is
1, the rotation of the drive shaft 1 is reduced and transmitted to the driven shaft 2.

On the other hand, when the speed of the rotation of the drive shaft 1 is increased to a high speed state in which the rotation is transmitted to the driven shaft 2, the operation lever 39 is positioned at the high speed position (Hi). Along with this switching, the first wire member 49 is pulled, and the movable sheave-side connecting member 20 moves in a direction opposite to the low-speed state, and the movable sheave 7 connected to the movable sheave-side connecting member 20 also moves. 1 moves to the right and approaches the fixed sheave 6. As a result, the drive pulley 5 closes, the diameter of the pulley increases, and the V-belt B is drawn toward the drive pulley 5.

The high-speed position (Hi) of the operation lever 39
The second wire case 52 is also pulled along with the switching to the movable sheave side connecting member 26 of the driven pulley 11 in the opposite direction to the above.
The movable sheave 13 connected to 6 also moves rightward in FIG. As a result, the driven pulley 11 opens, the diameter of the pulley decreases, and the V-belt B can move toward the driving pulley 5. As a result, the pulley diameter of the drive pulley 5 becomes larger than that of the driven pulley 11, and the rotation of the drive shaft 1 is accelerated and transmitted to the driven shaft 2.

Therefore, in this embodiment, the movable sheave 7 of the driving pulley 5 and the first
The swing part 40 is connected to the bearing 22, the connecting member 20, and the first
The movable sheave 1 of the driven pulley 11 is connected via a first wire member 49 in the wire case 48 so as to be movable in the axial direction, and the second swing portion 41 on the base end side of the operation lever 39 is connected to the movable sheave 1 of the driven pulley 11.
3, the second wire member 52 is inserted through the second wire member 53, the connecting member 26, and the bearing 28 so as to be movably connected in the axial direction. The movable sheaves 7 and 13 can be directly moved in the axial direction by the movement in the length direction, so that a speed adjusting bracket is not required unlike the related art, and the transmission A can be reduced in weight.

When the movable sheave 7 (or 13) of one pulley 5 (or 11) approaches the fixed sheave 6 (or 12), the movable sheave 13 (or 7) of the other pulley 11 (or 5) is moved. Since the first wire member 49 and the second wire case 52 are connected so as to be separated from the fixed sheave 12 (or 6), the movable sheaves 7, 13 can be maintained in the axial position, and the pulley 5 , 11 cancel each other out, and the operating force at the time of shifting can be reduced.

Further, since both movable sheaves 7, 13 are directly moved in the axial direction by the first wire member 49 and the second wire case 52, the number of parts is reduced as compared with the case where a speed adjusting bracket is used as in the prior art. Thus, the size and cost of the transmission A can be reduced.

Further, each of the fixed sheave side and movable sheave side connecting members 17, 23, 20, 26 is inserted into the hollow driving or driven shafts 1, 2, and the outer peripheral portions thereof are bearings 19, 25, 22. , 28 and pins 8, 14, 9, 15 to the fixed and movable sheaves 6, 12, 7, 13 so that the bearings 19, 25, 22, 28 and the connecting members 17, 23, 20, 26, 26 are connected. Can be reduced in size, and the weight of the transmission A can be further reduced. In addition, the seal diameters of the bearings 19, 25, 22, and 28 are also reduced, so that the rotational resistance can be reduced, and the transmission efficiency of the transmission A can be improved.

According to the present inventor, according to the loss torque according to the inner diameter of the bearing, for example, three minutes after the start of rotation when the inner race is rotated at a rotation speed of 500 rpm with the outer race of the bearing fixed. When the loss torque is obtained by reading the torque of the contact seal with a torque meter, the contact torque is about 0.
02kgf · m of rotational torque is lost. If two bearings are used on the drive and driven sides, a total of 0.0
The loss torque is 4kgf · m. Therefore, assuming now that the maximum input torque of the transmission is 0.25 kgf · m, 16% of this input torque (= (0.04 / 0.25) × 1
00), and the maximum transmission efficiency is 84%.
(= 100−16), and only a transmission efficiency of 84% or less can be expected (because another loss is added, the transmission efficiency does not exceed 84%). On the other hand, in the case of the contact type seal having a small bearing diameter of, for example, 15 mm as in the present embodiment, about 0.3 mm is used.
A rotational torque of 0015 kgf · m results in a loss. If four bearings are used on the drive and driven sides, a total loss of 0.006 kgf · m will result. Therefore, 2.4% of the maximum input torque of the transmission (0.25 kgf · m) (=
(0.006 / 0.25) × 100), and the maximum transmission efficiency is 97.6% (= 100−2.4).
And transmission efficiency of 97.6% or less is possible, and the transmission efficiency of the transmission A is greatly improved.

Further, fixed and movable sheaves 6, 1
Connecting members 17, 23, 2 located at the centers of 2, 7, 13
Since the wire members 49 and 53 and the wire cases 48 and 52 are connected to the fixed and movable sheaves 6, 0 and 26, respectively.
The movement of 12, 7, 13 in the axial direction becomes easy. Also,
Connecting members 17, 23, 20, 26 and bearings 19, 2
5, 22, 28 are housed in the driving or driven shafts 1, 2, so that the appearance of the transmission A can be improved.

(Embodiment 2) FIG. 3 shows Embodiment 2 of the present invention (note that the same parts as those in FIG. 1 are denoted by the same reference numerals and detailed description thereof is omitted). While the movable sheave 13 of the driven pulley 11 is driven by the wire case 52, it is driven by a wire member.

That is, in this embodiment, the drive-side transmission shaft 3 is fitted to the right end of the drive shaft 1 in FIG. 3, but the driven-side transmission shaft 4 is different from the above-described first embodiment. It is fitted to the right end of FIG.

The connecting member 2 disposed in the driven shaft 2
3 and 26, the fixed sheave side connecting member 23 has one through hole 27 'at the center similarly to the fixed sheave side connecting member 17 of the driving pulley 5. The movable sheave side connecting member 26 is the same as the movable sheave side connecting member 20 of the drive pulley 5 and has a screw hole 24 '.

Further, in the housing 32 as a fixed body, the support portion 34 and the first mounting portion 35 are the same as in the first embodiment, but the second mounting portion 36 is
3 protrudes in parallel with the first mounting portion 35 on the same side as the first mounting portion 35, and the two mounting portions 35 and 36 are arranged so as to face each other with a predetermined space therebetween. Further, similarly to the through hole 37 of the first mounting portion 35, the second mounting portion 36 is formed with a stepped through hole 47 in which the first mounting portion 35 side portion has a smaller diameter than the opposite side. I have.

The operating lever 39 'constitutes a moving member, and the distal end of the operating lever 39' is a moving portion 42 (swinging portion) located between the mounting portions 35 and 36 of the housing 32. Due to the swing of the support shaft 39 ′ around the support shaft 46, the moving portion 42 moves so as to be opposite to and away from the first and second mounting portions 35 and 36 of the housing 32. In the moving portion 42 of the operating lever 39 ', engaging portions 43, 44 are formed at positions corresponding to each other on the surface of the housing 32 facing the mounting portions 35, 36.

The first wire case 48 and the first wire member 49 are connected in the same manner as in the first embodiment, but the second wire case 48 is inserted into the through hole 27 ′ of the fixed sheave side connecting member 23 of the driven pulley 11. One end of 52 is fitted and fixed from the other end of the driven shaft 2 (the left side in FIG. 3). The other end of the second wire case 52 is connected to the second
The fitting portion 36 is fitted and fixed to a large diameter portion of the through hole 47.

The screw hole 24 'of the movable sheave side connecting member 26 of the driven pulley 11 is
A bolt 54 having one end fixed so as not to move is screwed and fastened. The second wire member 53 extends toward the housing 32 through the through-hole 27 ′ of the fixed sheave-side connecting member 23 and the inside of the second wire case 52, and the other end portion has the locking piece 5.
5, the operation lever 39 'is moved and integrally engaged with the engaging portion 44 of the moving portion 42 on the second mounting portion 36 side. Then, the operation lever 39 ′ is swung to guide the first wire member 49 in the first wire case 48 and the second wire member 53 in the second wire case 52 while sliding the two pulleys 5. , 11 are moved in the axial direction in opposite directions to each other, and as shown by the solid line in FIG. 3, when the operation lever 39 'is at the low speed position (Lo), the first wire member 49 is pushed to drive the pulley. 5 movable sheaves 7
From the fixed sheave 6 and the second wire member 53
To move the movable sheave 13 of the driven pulley 11 closer to the fixed sheave 12 so that the pulley diameter of the driving pulley 5 is smaller than that of the driven pulley 11, and as shown by an imaginary line in FIG. At the high speed position (Hi)
By pulling the wire member 49, the movable sheave 7 of the drive pulley 5 approaches the fixed sheave 6, and the second wire member 53
Is pressed to separate the movable sheave 13 of the driven pulley 11 from the fixed sheave 12, and the pulley diameter of the driving pulley 5 is made larger than that of the driven pulley 11.

Therefore, in this embodiment, the operating lever 39 'is swung to move the moving portion 42 on the distal end side.
The gears of the transmission A are switched by causing the first and second mounting portions 35 and 36 of the housing 32 to approach and separate from each other. Specifically, as shown by the solid line in FIG.
When the operation lever 39 'is positioned at the low speed position (Lo),
The moving part 42 moves away from the second mounting part 36 of the housing 32 toward the first mounting part 35, and the first wire member 49 connected to the moving part 42 is pushed and the first wire case 49 is moved. 48, the movable sheave 7 of the driving pulley 5 is moved relative to the fixed sheave 6.
Keep away from The moving part 4 of the operation lever 39 '
Since the second wire member 53 is also connected to the second wire member 53, the second wire member 53 is pulled and moved in the second wire case 52 as the moving portion 42 separates from the second mounting portion 36 of the housing 32. The movable sheave 13 of the driven pulley 11 moves relative to the fixed sheave 12
And the pulley diameter of the driving pulley 5 is
And a deceleration state in which the rotation of the drive shaft 1 is decelerated and transmitted to the driven shaft 2.

On the other hand, when the operation lever 39 'is positioned at the high speed position (Hi) as shown by the imaginary line in FIG. 3, the moving portion 42 separates from the first mounting portion 35 of the housing 32 and the second mounting portion. 36, the first wire member 49 is pulled, and the movable sheave 7 of the drive pulley 5 is moved.
Approaches the fixed sheave 6. Further, as the moving part 42 separates from the first mounting part 35, the second wire member 53 is pushed and relatively moves in the length direction in the second wire case 52, whereby the movable sheave of the driven pulley 11 is moved. 13 is separated from the fixed sheave 12, the diameter of the pulley of the driving pulley 5 becomes larger than that of the driven pulley 11, and a speed-up state in which the rotation of the driving shaft 1 is transmitted to the driven shaft 2 at a speed increased. Therefore,
In this embodiment, the same operation and effect as those of the first embodiment can be obtained.

In the second embodiment, it is not always necessary to use a swing type operation lever 39 ', and the moving part 42 to which the two wire members 49 and 53 are connected is connected to the two mounting parts 35 of the housing 32. , 36 can be used.

In each of the above embodiments, the operation lever 3
Although the oscillating member or the moving member is used as 9 'itself, the oscillating member or the moving member may be provided independently, and these may be driven by another operation lever.

[0064]

As described above, according to the first aspect of the present invention, the speed change pulleys provided on a pair of rotating shafts arranged in parallel with each other, and the transmission wound around the speed change pulleys. A connecting member and a fixed body rotatably connected to a fixed sheave of one of the pulleys via a bearing with a pulley type transmission having a belt, and a fixed body connected by a first wire case made of a flexible tube; A connecting member rotatably connected to a movable sheave of one pulley via a bearing and one side of a swing member are connected by a first wire member inserted into the first wire case, while the other pulley A connection member and a fixed body rotatably connected to the fixed sheave via a bearing by a second wire member, and a connection rotatably connected to the movable sheave of the other pulley via a bearing. The material and the other side of the swing member are connected by a second wire case made of a flexible tube through which the second wire member is inserted, and the movable sheave of both pulleys is linked and moved in the axial direction by the swing of the swing member. I changed the gear ratio. Further, in the invention of claim 2, the fixed sheave side connecting member of one pulley and the fixed body are connected by the first wire case, and the movable sheave side connecting member of one pulley and the moving member are connected to the first wire case. The first to be inserted into
While being connected by a wire member, the fixed sheave-side connecting member of the other pulley and the fixed body are connected by a second wire case, and the movable sheave-side connecting member of the other pulley and the moving member are connected in the second wire case. And the movable sheave of both pulleys is moved in the axial direction by the movement of the moving member to change the gear ratio. Therefore, according to these inventions, the movable sheave can be directly moved in the axial direction by each wire member and each wire case, so that the transmission can be reduced in weight and the number of parts can be reduced to reduce the number of parts. This has a practically excellent effect that the size and cost can be reduced.

Further, according to the third aspect of the present invention, since the rotating shaft is hollow and the connecting member and the bearing are disposed inside the rotating shaft, the bearing and the connecting member are downsized, so that the transmission is further reduced in weight. In addition to the above, the seal diameter of the bearing can be reduced, the rotational resistance can be reduced, the transmission efficiency of the transmission can be improved, and the appearance of the transmission can be improved.

[Brief description of the drawings]

FIG. 1 is a sectional view of a transmission according to a first embodiment of the present invention.

FIG. 2 is a front view showing the transmission according to the first embodiment with a wire member and a wire case removed.

FIG. 3 is a sectional view of a transmission according to a second embodiment of the present invention.

[Explanation of symbols]

 A transmission 1 drive shaft (rotary shaft) 2 driven shaft (rotary shaft) 5 drive pulley 6 fixed sheave 7 movable sheave 11 driven pulley 12 fixed sheave 13 movable sheave 17, 23 fixed sheave side connecting member 20, 26 movable sheave side connection Members 19, 22, 25, 28 Bearings 31 Gearshift mechanism 32 Housing (fixed body) 34 Supporting part 35 First mounting part 36 Second mounting part 39, 39 'Operating lever (swing member, moving member) 40 First swing Moving part 41 Second swing part 42 Moving part 46 Support shaft 48 First wire case 49 First wire member 52 Second wire case 53 Second wire member B Belt

Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) F16H 63/00-63/38 F16H 61/26-61/36 F16H 9/00-9/26

Claims (3)

(57) [Claims] 1. A pair of rotating shafts arranged in parallel with each other, a fixed sheave which is fixed to the rotating shaft integrally and non-slidably, and a shaft attached to the rotating shaft so as to face the fixed sheave. Consisting of a movable sheave supported slidably in the direction
A pair of shift pulleys in which the fixed sheaves oppose each other in a direction opposite to each other; and a belt member wound between the two shift pulleys, the movable sheaves of the respective shift pulleys facing each other. In the pulley type transmission device in which the effective ratio of each pulley to the transmission belt is changed by moving toward and away from the fixed sheave to change the transmission ratio between the two rotating shafts, a first portion is provided on both sides of the support portion and the support portion. And a fixed body having a second mounting portion, and a first swinging portion supported by a supporting portion of the fixed body so as to be swingable and swinging to one side of a fulcrum so as to come into contact with and separate from the first mounting portion. A swing member having, on the other side of the fulcrum, a second swing portion that swings toward and away from the second swing portion so as to approach and separate from the first swing portion; Each of the pulley fixed sheave and movable sheave A fixed sheave side and a movable sheave side connecting member connected integrally and relatively rotatably in the axial direction via a ring; one end connected to the movable sheave side connecting member of the one speed change pulley from one end side of the rotating shaft; A first wire member having the other end penetrating through the first attachment portion of the fixed body and connected to the first swing portion of the swing member; and one end having a fixed sheave side of the one speed change pulley. A flexible tube is connected to the connecting member from one end side of the rotating shaft, and the other end is connected to the first mounting portion of the fixed body, and the first wire member is slidably inserted therein. A first wire case, one end of which is connected to the fixed sheave side connecting member of the other speed change pulley from one end side of the rotating shaft, and the other end of which penetrates a second swing portion of the swing member. A second wire member connected to a second mounting portion of the fixed body; One end is connected to the movable sheave side connecting member of the other transmission pulley from one end side of the rotating shaft, while the other end is connected to a second swinging portion of the swinging member, and the second wire member is internally provided. Slidable second tube-shaped second member
A pulley transmission having a wire case, wherein the movable sheaves of the two shift pulleys are moved in the axial direction in cooperation with each other by the swing of the swing member. 2. A pair of rotating shafts arranged in parallel with each other, a fixed sheave which is fixed to the rotating shaft integrally and non-slidably, and a shaft mounted on the rotating shaft so as to face the fixed sheave. Consisting of a movable sheave supported slidably in the direction
A pair of shift pulleys in which the fixed sheaves oppose each other in a direction opposite to each other; and a belt member wound between the two shift pulleys, the movable sheaves of the respective shift pulleys facing each other. In a pulley type transmission device in which the effective ratio of each pulley to the transmission belt is changed by moving toward and away from the fixed sheave to change the speed ratio between the two rotating shafts, the pulley type transmission is arranged so as to face each other at a predetermined interval. The first
And a fixed body having a second mounting portion; and a moving member having a moving portion disposed between the first and second mounting portions of the fixed body and moving so as to be opposed to and separated from both mounting portions. A fixed sheave side and a movable sheave side connecting member connected to the fixed sheave and the movable sheave of each of the transmission pulleys via a bearing so as to be integrally movable and relatively rotatable in an axial direction; A first wire member connected to the sheave-side connecting member from one end of the rotation shaft, the other end of which is connected to a moving portion of the moving member through a first mounting portion of the fixed body; One of the transmission pulleys is connected to the fixed sheave side connecting member from one end of the rotating shaft, while the other end is connected to the first mounting portion of the fixed body, and the first wire member is slidably inserted therein. Flexible tube A first wire case, one end of which is connected to the movable sheave side connecting member of the other speed change pulley from the other end of the rotary shaft, and the other end of which passes through the second mounting portion of the fixed body. A second wire member connected to the moving portion of the moving member, one end of which is connected to the fixed sheave-side connecting member of the other transmission pulley from the other end of the rotating shaft, and the other end of which is the second of the fixed body; A flexible tube-shaped second wire case, which is connected to the mounting portion and slidably penetrates the second wire member therein, and moves the movable sheaves of the two shift pulleys by moving the moving member. A pulley-type transmission configured to move in the axial direction. 3. The pulley type transmission according to claim 1, wherein each rotary shaft is hollow, the connecting member is inserted into the hollow rotary shaft, and an outer peripheral portion is provided via a bearing. A pulley type transmission connected to fixed and movable sheaves.