JPH10227346A - Friction wheel type continuously variable transmission - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent large friction resistance from working on the rocking of a friction wheel by assembling the friction wheel in a state that the thrust needle bearing of the friction wheel is in contact with the side wall of a housing hollow. SOLUTION: V-shaped plate springs 7 and 8 are made to intervene between the fan shaped section 4a of a thrust needle bearing 4 for lightening the rocking of a friction wheel and the side walls 6a and 6b of a hollow 6 and lock their leg sections 7a and 8a to grooves 6c and 6d to be fixed to a friction wheel supporting member 2, and the leg sections 7b and 8b are pressed against the fan shaped section 4a to elastically support the fan shaped section 4a so that a tap is formed between the hollow side walls 6a and 6b. Therefore, when the bearing 4 is attached to the member 2 while covering the bearing 4 with the friction wheel, the fan shaped section 4a is not left contacted with the side walls 6a and 6b, lightening the rock of the friction wheel, which prevents the instability in speed changing.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a frictional wheel type continuously variable transmission, and more particularly to a suitable arrangement of a thrust needle bearing for a friction wheel.

[0002]

2. Description of the Related Art Generally, a friction wheel type continuously variable transmission is disclosed in
No. 89066, and FIG.
As is typified by the toroidal-type continuously variable transmission shown in FIG. 8, power is transmitted from the input disk to the output disk by being pressed between the input and output disks coaxially opposed to each other in a direction perpendicular to the drawing of FIG. A friction wheel 1 is rotatably supported on a friction wheel support member 2.

Since the friction wheel 1 is pinched between the input and output disks so that the above-described power transmission can be performed, the friction wheel 1 is expelled from the space between the input and output disks, that is, FIG.
Receive thrust to the right. Therefore, the friction wheel 1, specifically, the friction wheel outer member 1 a which receives the friction wheel in the thrust direction via the ball bearing 3 and the friction wheel support member 2, also rotate the friction wheel by the above-described thrust input. Usually, a thrust needle bearing 4 is interposed so that the operation is smoothly performed.

On the other hand, when the friction wheel 1 is rotatably supported on the friction wheel support member 2, the friction wheel 1 is connected to one of the mutually eccentric ends 5 a and 5 b of the pivot shaft 5.
with rotatable (O ₁ is the rotation center) is supported on the a, the other end 5b of the pivot shaft 5 rotatably supported by the friction wheel supporting member 2, convenience pivot shaft of the shift control friction wheel 1 5 Can swing around the other end 5b (O ₂ is the swing center).

Accordingly, the thrust needle bearing 4 is
As is apparent from FIG. 7, which shows the friction wheel 1 removed together with the ball bearing 3 and the friction wheel outer ring 1a, a structure having a fan-shaped portion 4a so that thrust from the friction wheel 1 can be reliably received even during the above-mentioned swing. It is customary to

[0006] Such a thrust needle bearing 4
It is arranged in the depression 6 formed in the friction wheel support member 2, and a gap is present between the side walls 6 a and 6 b of the depression 6 and the thrust needle bearing sector 4 a,
By allowing the sector 4a to move within the depression 6 by the gap, the swing of the friction wheel 1 is easily performed despite the thrust.

[0007]

By the way, in the conventional friction wheel type continuously variable transmission, the thrust needle bearing sector 4a can move freely within the recess 6 by the above-mentioned gap. Friction wheel 1 for friction wheel support member 2
When assembling, there is a possibility that the assembling may be performed in a state where the thrust needle bearing sector 4a installed in the recess 6 is in contact with the side wall 6a or 6b of the recess 6.

In this case, since there is no gap between the thrust needle bearing sector 4a and the side wall 6a or 6b of the depression 6 with which the thrust needle bearing sector 4a contacts, the thrust needle bearing sector 4a is no longer moved in the corresponding direction. Therefore, it is feared that a large frictional resistance is given to the swinging of the friction wheel 1 in the same direction, and a problem that the shift stability is adversely affected is caused.

According to the first aspect of the present invention, it is possible to provide a assurance that gaps are reliably present on both sides of the thrust needle bearing sector when assembling the friction wheel to the friction wheel support member. It is an object of the present invention to propose a friction wheel type continuously variable transmission which can solve the above problem.

A second object of the present invention is to propose a friction wheel type continuously variable transmission which can make the operation and effect of the first invention most remarkable.

A third invention according to a third invention to a fifth invention according to a fifth invention respectively aim at realizing the first invention or the second invention simply and at low cost.

A sixth invention described in claim 6 aims at realizing the first invention or the second invention more simply and inexpensively.

A seventh aspect of the present invention is directed to realizing the sixth aspect of the present invention with higher space efficiency.

[0014]

To achieve the above object, the friction wheel type continuously variable transmission according to the first aspect of the present invention is sandwiched between input and output disks coaxially opposed to each other, and power is supplied between the input and output disks. And a friction wheel support member rotatably supporting the friction wheel, rotatably supporting the friction wheel on one of the mutually eccentric ends of a pivot shaft, and The other end of the pivot shaft is rotatably supported by the friction wheel support member to enable the friction wheel to swing around the other end of the pivot shaft. The acting thrust is received by the friction wheel support member via a thrust needle bearing disposed in the recess of the friction wheel support member, and the thrust needle bearing is adapted to receive thrust from the oscillating friction wheel. A friction gear continuously variable transmission also has a fan unit to receive, said recess to said fan unit, and is characterized in that it has elastically supported so that there is a gap in the swinging direction sides.

Further, in the friction wheel type continuously variable transmission according to a second aspect of the present invention, in the first aspect, the fan-shaped portion is elastically supported with respect to the recess so that equal gaps exist on both sides in the swinging direction. It is assumed that.

According to a third aspect of the present invention, in the friction wheel type continuously variable transmission according to the first or second aspect, the elastic members are generated by leaf springs on both sides of the sector, and one end of each leaf spring is supported by the friction wheel. The member is locked in the recess.

According to a fourth aspect of the present invention, there is provided a friction wheel type continuously variable transmission according to the third aspect, wherein each of the leaf springs is V-shaped, and one leg of the V-shaped leaf spring is formed in the recess. , And the other leg is pressed against the fan-shaped portion.

According to a fifth aspect of the present invention, in the friction wheel type continuously variable transmission according to the first or second aspect, the elastic members are generated by leaf springs on both sides of the sector, and one end of each leaf spring is connected to the sector. It is characterized by being bound to the corresponding side surface.

According to a sixth aspect of the present invention, there is provided a friction wheel type continuously variable transmission according to the first or second aspect, wherein the elastic support has one end connected to a friction wheel support member and the other end locked to the sector. It is configured to be generated by a spring bar.

According to a seventh aspect of the present invention, in the friction wheel type continuously variable transmission according to the sixth aspect, the spring bar is disposed in a lubricating oil hole of a thrust needle bearing.

[0021]

A friction wheel that transfers power between the input and output disks by frictional engagement is rotatably and swingably supported on a friction wheel support member via a pivot shaft.
The above-mentioned power transmission is enabled by the rotation of the friction wheel, and a known shift is enabled by the swing of the friction wheel. Then, a thrust in a direction of being expelled from between the input and output disks acts on the friction wheel at the time of power transmission, and this thrust is received by the friction wheel support member via a thrust needle bearing disposed in a recess of the friction wheel support member.

In the first aspect of the present invention, the fan-shaped portion of the thrust needle bearing set to receive the thrust from the oscillating friction wheel is provided such that a gap exists on both sides in the oscillating direction with respect to the dent. When the friction wheel is attached to the friction wheel support member, the assembly may be performed in a state in which the fan-shaped portion of the thrust needle bearing installed in the recess is in contact with the side wall of the recess. Disappears. Therefore, it is possible to assure an assembled state in which the fan-shaped portion of the thrust needle bearing can move in any of the swinging directions, and a large frictional resistance acts on the swinging of the friction wheel, which adversely affects the gear shifting stability. Can be solved.

In the second aspect of the present invention, the sector of the thrust needle bearing is elastically supported with respect to the recess so that there are equal gaps on both sides in the swinging direction.
The above-mentioned effects according to the invention can be made most remarkable.

In the third invention, the elastic support of the thrust needle bearing sector is generated by leaf springs on both sides of the sector, and one end of each leaf spring is locked in the recess of the friction wheel support member. Therefore, the first invention and the second invention
The operation and effect of the invention can be achieved simply and inexpensively only by adding a leaf spring.

In the fourth invention, each leaf spring of the third invention is V-shaped, and one leg of the V-shaped leaf spring is engaged with the groove formed in the recess, and the other leg is formed. Is pressed against the fan-shaped portion, the leaf spring can be easily attached, and the operation and effect of the third aspect of the present invention become more remarkable.

In the fifth invention, the elastic support of the thrust needle bearing sector is generated by leaf springs on both sides of the sector, and one end of each leaf spring is connected to the corresponding side surface of the sector. The leaf spring can be handled as a part integral with the sector, and the effects of the first and second aspects of the invention can be achieved without increasing the number of parts.

According to the sixth aspect of the present invention, the elastic support of the thrust needle bearing sector is formed by a spring bar having one end connected to the friction wheel support member and the other end locked to the sector. The function and effect of the first and second inventions can be achieved even with only one spring bar, and the object can be achieved more simply and inexpensively than when the above-mentioned leaf spring is used.

According to the seventh aspect of the present invention, since the spring rod is disposed in the lubricating oil hole of the thrust needle bearing, the space efficiency of the installation space for the spring rod can be improved, and the space for the spring rod is externally provided. There are additional advantages that are not required.

[0029]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 and 2 show an embodiment of a friction wheel type continuously variable transmission according to the present invention, in which like parts in FIGS. 7 and 8 are denoted by the same reference numerals.

In this embodiment, the friction wheel support member 2 is provided with the side walls 6a, 6b adjacent to both side walls 6a, 6b of the depression 6 formed in the friction wheel support member 2 so as to arrange the thrust needle bearing 4. Notch grooves 6c and 6d extending along are formed. Incidentally, these notched groove 6c, respectively 6d sidewall 6a, to 6b, the friction wheel of the rotation center O ₁ and the side wall 6a toward the swing center O _2, is inclined so as to approach 6b, finally recess 6 To open.

[0031] Then, the fan-shaped portion 4a of the thrust needle bearing 4, the V-shaped plate spring 7 and 8 in order to elastically support the both sides of the friction wheel swinging direction at the center O ₂ around provided, these V-shaped plate spring One of the legs 7a, 8a is locked in the notch groove 6c, 6d, respectively.
b and 8b are respectively positioned in the depressions 6, and are brought into press contact with the adjacent side surfaces of the thrust needle bearing sector 4a.

[0032] Thus V-shaped plate spring 7 and 8 presses the sector portion 4a of the thrust needle bearing from both sides of the friction wheel swinging direction at the center O ₂ around in a direction opposite to each other, a fan unit 4a recess 6 It is elastically supported so that a gap exists between the side walls 6a and 6b. Here, the V-shaped leaf spring 7,
The spring force 8 is best determined to be equal to each other so that the gaps on both sides of the sector 4a in the friction wheel swinging direction are the same as shown in the figure.

In the friction wheel type continuously variable transmission according to the above-described embodiment, the sector portion of the thrust needle bearing 4 set to receive the thrust acting on the friction wheel while swinging around O _2. 4a are pressed by V-shaped leaf springs 7 and 8 facing each other from both sides in the direction in which the friction wheel swings, so that the side walls 6a and 6a of the sector 4a and the recess 6 are pressed.
b, the gap between the thrust needle bearing 4 and the sector 4a of the thrust needle bearing 4 installed in the recess 6 when the friction wheel is mounted on the friction wheel support member 2.
Is less likely to be assembled in a state where the contact is made with the side wall 6a or 6b of the recess 6.

[0034] Therefore, also it is possible to guarantee an assembled state capable of moving fan 4a of the thrust needle bearing 4 in either direction of the friction wheel swing direction, a large frictional resistance to swinging in friction wheel of O ₂ around Can solve the problem of the conventional device that the shift stability is adversely affected.

When the V-shaped leaf springs 7 and 8 are made to have the same spring force and the sector 4a of the thrust needle bearing 4 is elastically supported so as to have an equal clearance with the recessed side walls 6a and 6b. The effect can be most pronounced.

Further, in the present embodiment, the above-mentioned object can be achieved simply and inexpensively only by adding the V-shaped leaf springs 7 and 8, and one leg of these V-shaped leaf springs can be achieved. 7a and 8a are engaged with the notched grooves 6c and 6d, and the other leg portions 7b and 8b are pressed against the sector 4a, so that the leaf springs 7 and 8 can be easily attached and the leaf springs 7 and 8 can be easily attached. , 8 can be attached to the friction wheel support member 2 in advance, and the assembling workability can be improved.

FIG. 3 shows another embodiment of the present invention. In this embodiment, the fan-shaped portion 4 is formed by curved leaf springs 11 and 12.
a and the fan-shaped portion 4a is elastically supported so that a gap is formed between the recessed side walls 6a and 6b.
Instead of assembling one end portion of the friction wheel support member 2 with the friction wheel support member 2 in advance, the end portion is connected to the side surface corresponding to the sector 4a. And leaf spring 1
The sectoral portion 4a is formed by the spring reaction force generated by pressing the other end portions of the first and second portions against the concave side walls 6a and 6b.
And a gap is formed between them. Again,
In addition to the above-mentioned effects, the leaf springs 11, 1
2 can be handled as an integral part of the sector 4a, and an operational effect of not increasing the number of parts can be achieved.

FIGS. 4 and 5 show still another embodiment of the present invention. In this embodiment, a lubricating wheel supporting member 2 is formed on a friction wheel supporting member 2 for lubricating a thrust needle bearing sector 4a. Insert the spring rod 2 in the oil hole 21
2 is provided. Then, the base end 22a of the spring rod 22 is fixed to the bottom of the lubricating oil hole 21, and the spherical tip 22b is fixed to the lubricating oil hole 2.
Thrust needle bearing sector 4 projecting from 1
a.

Here, the spring rod 22 elastically supports the thrust needle bearing sector 4a in a free state as shown in the drawing so that a gap of the same degree as that between the recess side walls 6a and 6b is preferably formed. It shall be. Therefore, even when the thrust needle bearing sector 4a is displaced in the same direction by an external force in the direction indicated by α in FIG. 6, the spring rod 22 elastically deformed as shown by β in FIG. Since the thrust needle bearing sector 4a is returned to the position shown in FIGS. 4 and 5, the thrust needle bearing sector 4a is moved to the friction wheel support member 2 in a state where there is a certain gap between both sides of the sector 4a and the recessed side walls 6a, 6b. The friction wheel can be assembled, and the same operation and effect as in the above embodiment can be achieved.

In addition, according to the present embodiment, the spring rod 22
Can achieve the same operation and effect as in the embodiment described above, and the leaf springs 7, 8 (11,
The object can be achieved more simply and at lower cost than in the case of using the method 12). Further, in the present embodiment,
Connect the spring bar 22 to the thrust needle bearing sector 4
Since the spring rod 22 is disposed in the lubricating oil hole 21, the space efficiency of the installation space for the spring bar 22 can be increased, and there is an advantage that the space for the spring bar 22 is not additionally required outside.

[Brief description of the drawings]

FIG. 1 is a front view of a friction wheel support member and a thrust needle bearing showing one embodiment of a friction wheel type continuously variable transmission according to the present invention.

FIG. 2 is an enlarged detailed view of a main part of a friction wheel support member according to the embodiment.

FIG. 3 is a front view of a fan-shaped portion of a thrust needle bearing showing another embodiment of the present invention.

FIG. 4 is a detailed enlarged sectional view of a friction wheel support member and a thrust needle bearing fan-shaped portion according to still another embodiment of the present invention.

FIG. 5 is a front view of a thrust needle bearing sector in the embodiment.

FIG. 6 is a detailed enlarged sectional view similar to FIG. 4, showing a state where the thrust needle bearing sector is displaced by receiving an external force in the embodiment.

FIG. 7 is a front view showing a friction wheel support member of the conventional friction wheel type continuously variable transmission in a state where the friction wheel is removed.

FIG. 8 is a longitudinal sectional side view of the friction wheel support member having a cross section taken along line AA of FIG. 7 and showing a state where the friction wheel is mounted.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Friction wheel 2 Friction wheel support member 3 Ball bearing 4 Friction wheel outer ring 5 Pivot shaft 6 Depression 6a Depression side wall 6b Depression side wall 6c Notch groove 6d Notch groove 7 V-shaped leaf spring 8 V-shaped leaf spring 7a V-shaped Locking leg of leaf spring 8a Locking leg of V-shaped leaf spring 7b Pressing leg of V-shaped leaf spring 8b Pressing leg of V-shaped leaf spring 11 Leaf spring 12 Leaf spring 21 Thrust needle bearing lubricating oil Hole 22 Spring rod 22a Spring rod fixed base 22b Spring rod spherical tip

Claims (7)

[Claims] 1. A friction wheel sandwiched between input and output disks coaxially opposed to each other to transfer power between the input and output disks, and a friction wheel support member rotatably supporting the friction wheel. The friction wheel is rotatably supported on one of the mutually eccentric ends of the pivot shaft, and the other end of the pivot shaft is rotatably supported on the friction wheel support member. A friction wheel is swingable around an end, and a thrust acting on the friction wheel due to a clamping force between the input / output disks is transmitted through a thrust needle bearing disposed in a recess of the friction wheel support member. In the friction wheel type continuously variable transmission, the thrust needle bearing has a fan-shaped portion to receive the thrust from the oscillating friction wheel. Relative to the indentation, friction wheel continuously variable transmission, characterized in that the elastically supported such that gaps present in said swinging direction sides. 2. The friction wheel type continuously variable transmission according to claim 1, wherein the sector is elastically supported with respect to the recess so that there is an equal gap on both sides in the swing direction. 3. The device according to claim 1, wherein the elastic support is generated by leaf springs on both sides of the sector, and one end of each leaf spring is locked in the recess of the friction wheel support member. Friction wheel type continuously variable transmission. 4. The leaf spring according to claim 3, wherein each of the leaf springs is V-shaped, one leg of the V-shaped leaf spring is engaged with a groove formed in the depression, and the other leg is connected to the V-shaped leaf spring. A friction wheel type continuously variable transmission characterized by being pressed against a sector. 5. The friction according to claim 1, wherein the elastic support is generated by leaf springs on both sides of the sector, and one end of each leaf spring is connected to a corresponding side surface of the sector. Vehicle type continuously variable transmission. 6. The device according to claim 1, wherein the elastic support is formed by a spring bar having one end connected to the friction wheel support member and the other end locked to the sector. Friction wheel type continuously variable transmission. 7. The friction wheel type continuously variable transmission according to claim 6, wherein the spring bar is disposed in a lubricating oil hole of a thrust needle bearing.