JPH06221398A - Continuously variable transmission - Google Patents

Abstract

PURPOSE:To simplify and miniaturize structure by rotating swingingly a pair of rotary members in reverse directions mutually by swinging a swing member by means of the rotation of an input shaft with its swing speed being made variable, taking out output to an output shaft through one-direction clutches. CONSTITUTION:A swing member 2 is swung by the rotation of an input shaft 1. Then, a first rotary member 4 and a second rotary member 5 are rotated swingingly in reverse directions mutually under the intervention of a third rotary member 6, an at the time of the going motion of the first rotary member 4, an output shaft 3 is rotated in one direction through a first one-direction clutch 7, and at the time of the returning motion of the first rotary member 4, the output shaft 3 is rotated in the same direction with the rotary direction that is by means of the first rotary member 4, by means of the second rotary member 5 through a second one-direction clutch 8. Also, the swing speed of the swing member 2 is made variable by adjusting an interval between the axis L1 of the input shaft 1 and the swing shaft 22 of the swing member 2 by means of a speed change means 9, and the rotation number of the output shaft 3 is adjusted so as to be continuously variable.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuously variable transmission that continuously changes the rotation of an input shaft and transmits the rotation to an output shaft.

[0002]

2. Description of the Related Art Conventionally, as a continuously variable transmission, a V-belt is wound around a drive pulley and a driven pulley whose gap between a movable pulley and a fixed pulley can be changed, and a V belt is wound between the movable pulley and the fixed pulley. There is known a V-belt type continuously variable transmission in which the rotation of the drive-side input shaft is steplessly changed and transmitted to the driven-side output shaft by changing the gap.

However, since the above-mentioned V-belt type continuously variable transmission transmits torque by frictional force,
It has a drawback that it easily slips and its torque transmission capability is low. Therefore, the rotary motion of the input shaft is converted into the swing motion by the swing arm via the crank mechanism and the link mechanism, and the swing motion by the swing arm is converted again into the rotary motion by the link mechanism and the one-side clutch. hand,
A system in which an output shaft is rotated is provided (see, for example, Japanese Utility Model Laid-Open No. 2-78859).

[0004]

A continuously variable transmission using the above crank mechanism and link mechanism has a link mechanism between the input shaft and the swing arm and between the swing arm and the output shaft. Since it is necessary to intervene, there is a problem that the structure becomes complicated and the device becomes large.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a continuously variable transmission which can be downsized with a simple structure.

[0006]

SUMMARY OF THE INVENTION To achieve the above object, a continuously variable transmission according to the present invention is a continuously variable transmission that continuously changes the rotation of an input shaft and transmits the rotation to an output shaft. The rocking speed of the rocking member is controlled by changing the distance between the rocking member that is rocked around the rocking axis parallel to the axis by the shaft and the rocking shaft of the rocking member and the axis of the input shaft. The speed changing means for adjusting in stages, the first rotating member which is oscillated around the axis of the output shaft by the oscillating member, and rotatable around the axis of the output shaft in a state of facing the first rotating member. And a second rotating member provided between the first rotating member and the second rotating member, and interlocking with the swinging rotation of the first rotating member, the second rotating member serves as the first rotating member. The third rotating member that swings and rotates in the opposite direction is interposed between the first rotating member and the output shaft. A first one-clutch that transmits the rotation of the rolling member in the forward direction to the output shaft, and a first clutch that is interposed between the second rotating member and the output shaft. When the first rotating member returns, the second rotating member rotates. Is provided to the output shaft, and a second one clutch is provided.

[0007]

According to the continuously variable transmission having the above structure, the swinging member is swung about the swinging axis parallel to the axis of the input shaft by the rotation of the input shaft, and the swinging member swings. The first rotating member and the second rotating member can be oscillated and rotated in opposite directions. Then, the rotation of the first rotating member in the forward direction can be transmitted to the output shaft via the first one-side clutch to rotate the output shaft in the predetermined direction.
When the rotary member returns, the rotation of the second rotary member can be transmitted to the output shaft via the second one-side clutch, and the output shaft can be rotated in the same direction as the first rotary member.

Further, by changing the distance between the rocking shaft of the rocking member and the axis of the input shaft by the shifting means to change the rocking speed of the rocking member, the rotation of the input shaft is continuously variable. Can be transmitted to the output shaft.

[0009]

Embodiments will be described in detail below with reference to the accompanying drawings showing embodiments. 1 is a sectional view showing an embodiment of a continuously variable transmission according to the present invention, and FIG. 2 is a sectional view taken along line II-II thereof. This continuously variable transmission includes an input shaft 1 that is rotationally driven,
The rocking member 2 rocked by the input shaft 1, the output shaft 3 rotating around the axis L2 set on the extension line of the axis L1 of the input shaft 1, and the rocking member 2 are engaged with the rocking member 2. A first rotating member 4 which is rocked and rotated by a predetermined angle in accordance with the rocking of the rocking member 2, a second rotating member 5 arranged to face the first rotating member 4, a first rotating member 4 and a second rotating member. The second rotary member 4 is interposed between the second rotary member 4 and the first rotary member 4,
A third rotating member 6 for swinging and rotating the rotating member 5 in the opposite direction to the first rotating member 4, and a first one-side clutch 7 for transmitting swinging rotation of the first rotating member 4 in a predetermined direction to the output shaft 3. , Second
The main part is constituted by the second one-side clutch 8 that transmits the swinging rotation of the rotating member 5 in the predetermined direction to the output shaft 3, and the speed changing means 9 that continuously changes the swinging speed of the swinging member 2. There is.

The input shaft 1 is provided on the upper surface of the tip flange portion 11,
The engaging pin 12 that engages with the swinging member 2 is provided so as to project from the axis L1 in an eccentric manner. The oscillating member 2 is formed by suspending an oscillating shaft 22 parallel to the axis L1 of the input shaft 1 on the lower surface of a main body 21 having a long piece shape.
A long groove 23 for introducing the pin 12 protruding from the input shaft 1 is formed on the lower surface side of the. Also, the main body 2
A long groove 24 for introducing an engagement pin 41, which will be described later, of the first rotation member 4 is formed on a side of the upper surface of 1 facing the long groove 23 with the swing shaft 22 interposed therebetween.

Both ends of the output shaft 3 are rotatably supported by the housing H via bearings 31, and the one-way clutches 7 and 8 are integrally rotatable with a large diameter portion 32 in the middle thereof. It is installed. The first rotating member 4 is provided so as to be concentrically rotatable with the output shaft 3 via the first one-side clutch 7, and the swinging member 2 is provided at a position near the outer circumference of the disc-shaped main body 42. An engagement pin 41 that engages with the long groove 24 is formed so as to hang down. A gear 43 that meshes with the third rotating member 6 is formed near the outer periphery of the upper surface of the main body 42.

The second rotating member 5 is provided rotatably concentrically with the output shaft 3 via the second one-side clutch 8. The second rotating member 5 is arranged symmetrically with the first rotating member 4, and the disc-shaped main body 52 has a lower surface near the outer periphery.
A gear 53 that meshes with the third rotating member 6 is formed.
The third rotating member 6 is arranged between the rotating members 4 and 5,
At least two are provided, and each has a housing H
On the other hand, it is rotatably supported via a bearing 61. The third rotating member 6 is composed of a bevel gear.

The first one-way clutch 7 transmits the forward rotation of the first rotating member 4 to the output shaft 3 to rotate the output shaft, and the second one-way clutch 8 operates the second clutch. The rotation of the rotary member 5 in the same direction as the forward direction of the first rotary member 4 is transmitted to the output shaft 3. That is, the first one-side clutch 7 and the second one-side clutch 8 transmit torque in the same direction. On the other hand, the clutch 7,
As 8, for example, a sprag type one-way clutch in which a sprag such as a spherical roller or a corrugated roller is interposed between an inner ring and an outer ring can be adopted.

The transmission means 9 comprises a bearing 91 that rotatably supports the swing shaft 22 of the swing member 2, and a rack 92 and a pinion 93 that change the distance between the bearing 91 and the axis L1 of the input shaft 1. It is composed of the above pinion 9
By rotating 3 in both forward and reverse directions manually or automatically, the swinging member 2 can be moved in the left-right direction in FIG. 1, and the swinging speed can be continuously changed.

With the above structure, the first rotating member 4 and the second rotating member 5 are oscillated in opposite directions by oscillating the oscillating member 2 by the rotation of the input shaft 1. When the first rotating member 4 moves forward, the output shaft 3 is rotated in one direction via the first one-way clutch 7, and when the first rotating member 4 returns, the second rotating member 5 causes the one-way clutch. The output shaft 3 can be rotated in the same direction as the rotation direction of the first rotating member 4 via 8.

By adjusting the distance between the axis L1 of the input shaft 1 and the rocking shaft 22 of the rocking member 2 by the speed changing means 9, the rocking speed of the rocking member 2 is changed to change the output shaft. The number of rotations of 3 can be adjusted steplessly. As described above, in the continuously variable transmission, the first rotating member and the second rotating member provided so as to rotate the swinging member 2 concentrically with the output shaft 3.
Since it is transmitted to the output shaft 3 via the rotating member, the structure can be greatly simplified and the size can be reduced. In addition, since the continuously variable transmission uses the lock torque of the one-side clutch and does not use friction, a large rotational torque can be transmitted to the output shaft.

The continuously variable transmission according to the present invention is not limited to the above embodiment, and for example, the axis L of the output shaft 3 may be used.
2 is eccentric or inclined with respect to the axis L1 of the input shaft 1, and torque transmission between the first rotating member 4 and the second rotating member 5 is performed by rolling contact by rollers, Various designs such as rotatably supporting the rotating members 4 and 5 with respect to the housing H and indirectly supporting the output shaft 3 to the housing H via the rotating members 4 and 5 and the one-side clutches 7 and 8. You can make changes.

[0018]

As described above, according to the continuously variable transmission of the present invention, the rotation of the input shaft includes the swing member, the rotary member swingably rotated by the swing member, and the one-side clutch. Since it is designed to be transmitted to the output shaft via
Combined with the fact that each rotating member is provided concentrically with the output shaft, the structure can be greatly simplified and the device can be downsized.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a continuously variable transmission according to the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 input shaft 2 rocking member 3 output shaft 4 1st rotating member 5 2nd rotating member 6 3rd rotating member 7 1st one clutch 8 2nd one clutch 9 speed-change means 22 rocking shaft L1 axis of input shaft L2 output shaft Axis of

Claims (1)

[Claims] 1. A continuously variable transmission for continuously rotating a rotation of an input shaft and transmitting the rotation to an output shaft, the rocking member being rocked around a rocking shaft parallel to an axis of the input shaft by the rocking member. A transmission means for continuously adjusting the swing speed of the swing member by changing the distance between the swing shaft of the swing member and the axis of the input shaft; and swinging about the axis of the output shaft by the swing member. A first rotating member that rotates, a second rotating member that is rotatably provided around the axis of the output shaft in a state of facing the first rotating member, the first rotating member, and the second rotating member. A third rotating member that is interposed between the first rotating member and the first rotating member to rotate the second rotating member in the opposite direction to the first rotating member; A first one-side clutch interposed between the first rotation member and transmitting the rotation of the first rotation member in the forward direction to the output shaft; A continuously variable transmission including a second one clutch interposed between the second rotating member and the output shaft and transmitting the rotation of the second rotating member to the output shaft when the first rotating member returns. apparatus.