JPH1078094A - Continuously variable transmission using casing as pulley - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a continuously variable speed pulley without changing the position of a driving motor by providing an appropriate number of ball rollers press-engaged at one point on a spherical surface, and providing means for inclining the rotating axes of respective ball rollers concurrently. SOLUTION: When a driving shaft 1 is rotated, a driving wheel 8, six ball rollers 12, a driven wheel 10, and a casing 6 are turned, and a timing belt is driven through a timing pulley 7 which is formed at the one side of the casing 6, to which the timing belt is engaged and tensed. When a handle 19 is turned, respective reciprocating members 11 are reciprocated, which move laterally in the axial direction of a slider 18 screwed by a feed threaded rod 20 and are linked through a rack 17 and a sector gear 21, and the turning shaft of a ball roller 12 is oscillated. A difference is generated between the rotational effective diameter of the driving wheel which is press-engaged with the ball rollers, and the rotational effective diameter of the driven wheel side, thus it is possible to attain continuous speed variation of the casing 6 from a high speed to a low speed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a continuously variable pulley,
The present invention relates to a continuously variable transmission having a casing suitable for a continuously variable transmission pulley between machine frames, a continuously variable transmission for a motorcycle, and the like.

[0002]

2. Description of the Related Art Conventionally, as a transmission for a mechanical device, FIG.
The belt transmission shown in FIG. In this belt transmission, a pulley 102 composed of an umbrella-shaped fixed sheave and a movable sheave is provided on a shaft of a drive motor 101, and the drive motor 101 is moved on a slide table 103 to change the rotation speed on the mechanical device side. is there.

[0003]

According to the present invention, there can be provided a continuously variable pulley which does not need to change the position on the drive motor side as in the belt transmission.
It is an object of the present invention to provide a continuously variable transmission that can be applied as a continuously variable transmission pulley between machine frames or a continuously variable transmission of a motorcycle.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. The present invention has a driving shaft and a fixed shaft which are arranged on the same axis and both sides of a casing are pivotally mounted. A dish-shaped prime mover connected to the driving shaft, and a dish-shaped driven vehicle opposed to the prime mover and connected to the casing are provided, and each of the prime mover and the driven vehicle is provided between the prime mover and the driven vehicle. And a suitable number of ball rolling elements that are respectively pressed and engaged at one point on the spherical surface and are pressed and engaged with each other at a line or point via a swinging member, and the rotation axis of each ball rolling element is provided. Means for simultaneously tilting the fixed shaft, and means for generating a pressing force between the ball rolling element and the prime mover and the driven vehicle are provided. Device.

[0005]

When the prime mover rotates, the prime mover connected to the prime mover rotates, and the casing is moved through the ball rolling element that is in pressure contact with the prime mover and the driven wheel that is in pressure contact with the ball rolling element. Driven. When the rotation axis of each ball rolling element is tilted by means for tilting the rotation axis of the ball rolling element, the effective rotating diameter of the driving wheel and the effective rotating diameter of the driven wheel that are in pressure contact with the ball rolling element are provided. When the effective rotation diameter on the prime mover side is smaller than that on the driven vehicle side, the driven vehicle, that is, the casing is rotated at a high speed.

[0006]

FIG. 2 shows a first embodiment in which the present invention is applied to a continuously variable transmission pulley, wherein M is a motor, X1 is a continuously variable transmission according to the present invention, Is a timing belt.

FIG. 3 shows a continuously variable pulley X1 according to the present invention.
4, FIG. 4 is a sectional view taken along line AA of FIG. 3, FIG. 5 is an exploded perspective view showing the internal configuration, and FIG. 6 is a perspective view of the spider. The configuration will be described as follows. .

In the drawing, reference numeral 1 denotes a hollow driving shaft fixed to a shaft of a motor M, and 2 denotes a hollow fixed shaft fixed to a base 5 via a column 3 and an L bracket 4, and is the same shaft as the driving shaft 1. It is provided on the line.

Reference numeral 6 denotes a drum-shaped casing provided with a timing pulley 7 on one side. The drum-shaped casing is cantilevered on the driving shaft 1, and the fixed shaft 2 is pivotally mounted on the other side via a bearing.

[0010] Inside the casing 6, a dish-shaped driving wheel 8 provided at the end of the driving shaft 1 and a driven wheel 10 connected to the casing 6 via a known torque cam 9 are provided to face each other. The rocking member 1 is provided between the prime mover 8 and the driven vehicle 10 respectively.
The six ball rolling elements 12 which are supported by 1 and press-fit on both sides with the rim portions of the driving wheel 8 and the driven wheel 10 are arranged.

As shown in FIG. 5, the fixed shaft 2 is provided with six grooves 13 in the form of a spline on the inner surface thereof. A spline 16 for engaging the spider 15 is provided, and a slider 18 in which each rack 17 is engaged with the long hole 14 is inserted into the inside so as to be able to move laterally. It is configured to be screwed to the provided feed screw rod 20 and to move in the fixed shaft 2 by rotating the handle 19.

The structure of the swing member 11 is formed in an arc shape,
As shown in FIG. 5, a sector gear 21 meshing with the rack 17 through the long hole 14 and a groove 23 engaging with a ball bearing outer ring 22 provided on the ball rolling element 12 are provided on the opposite side. When the slider 18 moves laterally in the axial direction, the rotation axis of the ball rolling element 12 swings.

As shown in FIGS. 4 to 6, the spider 15 engaged with the spline 16 of the fixed shaft 2 has six spiders cut between the outer races 22 of the adjacent ball rolling elements 12, 12. As shown in FIG. A projection 24 for holding the position of the ball rolling element 12 and a relief groove 25 for the six swing members 11 are provided.

In the first embodiment, the ball rolling elements 12
The bearing-shaped outer ring 22 which is rotatably mounted on the
As shown in FIG. 7, the outer race 22 is attached to the ball rolling element main body via a ball as in the case of the ball bearing, but a raceway groove 221 is provided in the outer race 22 as shown in FIG. 5B, a ball roller having a cylindrical roller 222 engaged therewith. As shown in FIG. 5B, a raceway groove 223 is provided in the ball roller main body, and the cylindrical roller 222 is engaged with the raceway groove 223. 5 (c), a drum-shaped roller 224 is provided between the outer race 22 and the ball rolling element main body as shown in FIG. 5 (c), or a ball bearing 225 is formed as shown in FIG. 5 (d). The ball rolling element body may be a hemisphere united type. These ball rolling elements can be manufactured with high manufacturing accuracy using the conventional ball bearing manufacturing technology.

The six ball rolling elements 12, 12, 12, 12, 12, 12 configured as described above are arranged so that both sides are narrowed by the rims of the driving wheel 8 and the driven wheel 10, When the shaft 1 is rotated, the prime mover 8 and six ball rolling elements 1
2, 12, 12, 12, 12, 12, 12, a driven vehicle 10, and a known torque cam 9, the casing 6 is rotated, and a timing belt is stretched over the timing pulley 7 provided on one side of the casing 6. Drive V.

FIG. 8 shows the movement of the six ball rolling elements 12 and the swinging member 11. In the state before the start in FIG. 8A, their positions with respect to the driving wheel 8 and the driven wheel 10 are different. However, when the driving axle 1 is started, the contact pressure between the driving wheel 8 and the ball rolling element 12 and between the ball rolling element 12 and the driven wheel 10 is increased by the action of the torque cam 9, and the six pieces in the floating state Ball rolling element 12 and swinging member 1
1 drives the casing 6 in the aligned state shown in FIG.

In FIG. 3, when the handle 19 is turned, the slider 18 screwed to the feed screw rod 20 is turned.
Oscillates in the axial direction, swings each swing member 11 connected to the rack 17 via the sector gear 21, and rotates the ball rolling element 12 via the groove 23 and the outer ring 22 engaged with the groove 23. Rocks.

FIG. 9 shows a contact state between the driving wheel 8 and the driven wheel 10 when the ball rolling elements 12 and 12 swing.
In the state [I], the driven vehicle turns at high speed because the effective rotation diameter on the driving vehicle side in contact with the ball rolling element 12 is smaller than that on the driven vehicle side. Then, the driven vehicle has the same speed as the prime mover, and in the state [III], the effective diameter of rotation on the prime mover side is larger than that on the follower vehicle side, so the driven vehicle becomes slow.

Therefore, by rotating the handle 19, the casing 6 can be continuously variable from a high speed to a low speed.

In the first embodiment described above, the present invention is applied to a continuously variable pulley. According to this apparatus, the position of the motor M is different from that of the conventional belt transmission shown in FIG. The first embodiment is suitable as a continuously variable pulley in a case where the user does not want to move the motor M or in a case where there is a restriction in mounting the motor M.

As will be readily apparent to those skilled in the art from FIG. 2, if the timing pulley 7 is replaced with a gear, a sprocket, a V-pulley, etc. A continuously variable pulley can be provided.

FIG. 10 shows a continuously variable transmission X2 according to a second embodiment applied to an inter-frame continuously variable transmission pulley, similarly to the first embodiment. Are different from each other in that the number of the shafts is four, the rotation shaft swinging mechanism of the ball rolling element, and the fact that the shaft position of the casing 33 is double-supported.

That is, the driving shaft 31 provided on the same axis line
The casing 33 is pivotally connected to the other machine frame 44 via a ball bearing 45 on the hollow fixed shaft 32 screwed to the machine frame 44, and the rotation of the motor shaft 31 is rotated by a motor wheel 34 and four ball rolling elements. 35,
35, 35, 35, a driven wheel 36, a known torque cam 37
Is transmitted to the casing 33 through the shaft-shaped swinging member 40 having a groove 39 for engaging the outer ring 38 as shown in FIG. A ball 42 is swung by actuating a control cylinder 43 using a fluid provided in a hollow fixed shaft 32 with a connecting rod 42 received at a support member 41 and having one end fixed to the support member 41. This is the difference. Reference numeral 42 denotes a spider provided with four projections 43 for holding the position of the ball rolling element 35 and fixed to the fixed shaft 32.

The continuously variable transmission pulley between machine frames has a driving shaft 31.
Is rotated, the prime mover 34 and the four ball rolling elements 3
5, 35, 35, 35, the driven vehicle 36, and the casing 33 are driven through the torque cam 37, and as the casing 33 rotates,
The driven wheel 36 is pushed to the right in FIG. 10 by the action of the torque cam 37 to increase the contact pressure with the ball rolling element 35, and the ball rolling element, which has been in a state close to floating, the swinging member and the supporting member. The member 41 is moved in the axial direction by the elastic bending of the elongated connecting rod 42 so as to be aligned as shown in FIG.

FIG. 13 shows the contact state between the driving wheel 34 and the driven wheel 36 when the ball rolling element 35 swings. As in the first embodiment, [I] is at low speed and [II] is at low speed. At constant speed, [III] is at high speed.

Power can be transmitted in both directions, and the casing 33 can be used as a driving vehicle and the driving shaft 31 can be used as a driven shaft. In this case, the shifting action is exactly the same.

Although two embodiments in which the present invention is applied to a continuously variable speed pulley have been described above, as will be readily apparent to those skilled in the art from these embodiments, bicycles, motorcycles, scooters, etc. It can be applied as a continuously variable transmission for motorcycles.

Hereinafter, the present invention is applied to a continuously variable transmission X3 for a bicycle.
A third embodiment in which the present invention is applied will be described.

FIG. 14 is a sectional view of a third embodiment of the present invention.
FIG. 15 is a sectional view taken along line BB, and FIG.
Is a hollow driving shaft, 61 is a hollow fixed shaft (hub shaft) fixed to the bicycle frame, and 53 is a hub (casing) pivotally connected to the driving shaft 51 and the hub shaft 61.

A chain sprocket 54 is attached to the outside of the driving shaft 51, and a dish-shaped driving wheel 56 screwed with a left screw 55 is provided in the hub 53.

A driven vehicle 57 opposed to the driving vehicle 56
Are connected to the inner surface of the hub 53 via a torque cam mechanism 58 also serving as a freewheel.

Four ball rolling elements having a self-aligning type bearing outer ring 59 having a part of a spherical surface between the driving wheel 56 and the driven wheel 57, similarly to the above embodiment. 60 are provided.

Since this embodiment is a continuously variable transmission for a bicycle, the rotation shaft swinging mechanism of the ball rolling element 60 is provided as follows so that it can be mounted in place of the conventional bicycle transmission. It is configured in.

That is, a hollow hub shaft 61 fixed to a bicycle frame is provided in the driving shaft 51, a spline 62 and a long hole 63 are provided in the hub shaft 61, and an outer ring 59 of the ball rolling element 60 is engaged. A shifter 65 provided with a semicircular groove 64 to be engaged is engaged with the spline 62, and a spring pin 66 penetrating the long hole 63 is attached to the shifter 65, and a plunger is provided in a hub shaft 61 on the right side of the spring pin 66. 67 and coil spring 68
On the left side, a control rod 69 driven by a known release device is provided.
9 is pressed by a release device against the coil spring 68, whereby the shifter 65 is moved laterally to swing the rotation axis of the ball rolling element 60.

FIG. 17 is an explanatory view showing the structure and operation of the torque cam mechanism 58 which also serves as a freewheel. 571 is a cam ring provided on the driven wheel 57, 572 is an L-shaped groove cam, 532
Numeral denotes a V-groove ring attached to the hub 53, and 532 denotes a ball inserted between the V-groove 531a of the V-groove ring 531 and the L-shaped groove cam 572.

Now, the cam ring 571 of the driven wheel 57 is (a)
In the figure, when the cam ring 571 moves in the direction of the arrow, the cam is in a working state. When the cam ring 571 moves in the direction of the arrow, as shown in FIG.

With the above configuration, when the continuously variable transmission X3 is mounted on a bicycle and the pedal is depressed in the forward direction, the driving shaft 51 provided with the chain sprocket 54 rotates, and the driving shaft 51 and the driving shaft 51 are rotated. Since the driving wheel 56 is screwed with the left screw 55, the driving wheel 56 moves to the left in FIG. 14 to increase the contact pressure with the ball rolling element 60, and the ball rolling element 6
17, the driven wheel 57 rotates as indicated by the arrow in FIG. 17A, and the cam ring 58 is in a cam operated state to rotate the hub 53.

However, when the pedal is depressed in reverse, the driving vehicle 5
6 moves rightward in FIG.
The contact pressure with the bicycle drops, and the bicycle enters a free running state.

When the pedaling is stopped,
Since the V-groove ring 531 rotates in the direction of the arrow as shown in FIG. 17B, the bicycle is in a free running state also in this case.

When the control rod 69 is moved laterally via the release, the rotation axis of the ball rolling element 60 is swung, and the shifting action is not performed as shown in FIG. It can be stepped.

As described above, according to the present invention, it is possible to provide a continuously variable transmission pulley that does not require moving the prime mover, and if the casing is a flat pulley, a conveyor belt with a continuously variable transmission is provided. A drive roller can be provided. Further, a continuously variable transmission for a motorcycle can be provided.

[Brief description of the drawings]

FIG. 1 is a side view of a known belt transmission.

FIG. 2 is a perspective view of the first embodiment of the present invention.

FIG. 3 is a longitudinal sectional view of the first embodiment of the present invention.

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is an exploded perspective view of the first embodiment of the present invention.

FIG. 6 is a perspective view of a spider.

FIG. 7 is a diagram showing an example of the structure of various ball rolling elements that can be used in the present invention.

FIG. 8 is a view for explaining the centering action of the ball rolling element and the swing member.

FIG. 9 is an explanatory diagram of a shift operation according to the first embodiment of the present invention.

FIG. 10 is a vertical sectional front view of the second embodiment of the present invention.

FIG. 11 is a vertical sectional side view of a second embodiment of the present invention.

FIG. 12 is an enlarged perspective view illustrating shapes of a support member and a swing member according to a second embodiment.

FIG. 13 is an explanatory diagram of a shift operation according to the second embodiment of the present invention.

FIG. 14 is a longitudinal sectional view of a third embodiment of the present invention.

FIG. 15 is a sectional view taken along line BB of FIG. 14;

FIG. 16 is an exploded perspective view of a third embodiment of the present invention.

FIG. 17 is a diagram illustrating a configuration of a torque cam that also serves as a freewheel and an operation principle thereof.

FIG. 18 is an explanatory diagram of a shift operation according to a third embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 driving shaft 2 fixed shaft 3 support 4 L bracket 5 base 6 casing 7 timing pulley 8 driving wheel 9 torque cam 10 driven wheel 11 rocking member 12 ball rolling element 13 groove 14 long hole 15 spider 16 spline 17 rack 18 slider 19 handle Reference Signs List 20 feed screw rod 21 sector gear 22 outer ring 23 groove 24 projection 25 relief groove

Claims (1)

[Claims] 1. A motor-driven shaft and a fixed shaft arranged on the same axis are pivotally mounted on both sides of a casing, and a dish-shaped motor connected to the motor in the casing is opposed to the motor.
A dish-shaped driven vehicle connected to the casing is provided, and between the driven vehicle and the driven vehicle, each of the driven vehicle and the driven vehicle is pressed and engaged at one point on the spherical surface, and the rocking member is interposed therebetween. A suitable number of ball rolling elements that are pressed and engaged with each other at a line or a point are provided, and means for simultaneously inclining the rotation axis of each ball rolling element is provided on the fixed shaft. A continuously variable transmission using a casing as a pulley, wherein a means for generating a pressure contact force is provided between a prime mover and a driven vehicle.