JPS6134571B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a metal V-belt type power transmission device.

The applicant of the present application has previously developed a device of this type in which a plurality of V-shaped metal members and a plurality of elastic metal members are mounted on a metal belt member made of endless steel strip or other material.
The V-pulleys are arranged alternately in contact with each other to form a V-pulley, and this is stretched between the V-pulley on the driving side and the V-pulley on the driven side to transmit power between the two pulleys. Furthermore, each elastic metal member is formed into a hollow roller, which is engaged with each of the concave surfaces formed on each pair of opposing surfaces on both outer sides, and is tightened from the outer periphery with the metal belt member. A V-shaped metal member is pressed and bonded to the metal belt member via each elastic metal member, and each V-shaped metal member is supported so as to be slidable in and out between each pair of the elastic metal members. We have proposed a type that has an engaging surface facing the metal belt member so that when engaged with each V pulley, the metal belt member is pressed and bonded to the belt member, but in this case Generally, the engagement surface has a planar shape facing the inner circumferential surface of the belt member and is simply pressed against the belt member in a mutual plane, and there is a demand for better bonding. exists.

The object of the present invention is to obtain a device that meets such requirements, in which a plurality of V-shaped metal members and a plurality of elastic metal members are mounted on a metal belt member made of endless steel strip or other material. The V-pulleys are arranged alternately in contact with each other to form a V-pulley, and this is stretched between the V-pulley on the driving side and the V-pulley on the driven side to transmit power between the two V-pulleys. Further, each elastic metal member is formed into a hollow roller, which is engaged with each concave surface formed on each pair of opposing surfaces on both outer sides, and is tightened from the outer periphery with the metal belt member. By tightening, each V-shaped metal member is pressed and bonded to the metal belt member via each elastic metal member, and further, each V-shaped metal member is connected between the inner and outer parts of each pair of the elastic metal members. The metal belt member is slidably supported on the metal belt member, and is provided with an engaging surface facing the metal belt member. In a type of device that is connected to a metal belt member by pressure contact, the metal belt member is formed into a substantially V-shaped cross section that gradually becomes narrower inwardly, and the engagement surface is approximately adapted to this. It is formed into a substantially V-shaped cross section.

Embodiments of the present invention will be described with reference to the attached drawings. In the drawings, reference numeral 1 indicates a continuously variable transmission for a motorcycle, and the transmission 1 includes a V belt between a V groove 3 of a V pulley 2 on the driving side and a V groove 5 of a V pulley 4 on the driven side. 6 is stretched to transmit power between both pulleys 2 and 4.

The V-belt 6 includes a plurality of V-shaped metal members 8 and a plurality of elastic metal members 9 which are alternately arranged one after another in contact with each other on a metal belt member 7 consisting of a plurality of endless steel strips. In this case, each elastic metal member 9 consists of a hollow roller, which is engaged with each concave surface 10, 10 formed on the opposing surface of each pair of V-shaped metal members 8, 8 on both outer sides. At the same time, they are tightened from the outer periphery by the metal belt member 7. According to the tightening, the belt member 7 connects each elastic metal member 9 and, via this, each V-shaped metal member 8.
These members 7, 8, and 9 are bonded by mutual pressure. In other words, each V-shaped metal member 8 is positioned and fixed on the metal belt member 7, and thus each V-shaped metal member 8 engages with the V-groove 3 of the V-pulley 2 on the drive side. When the belt member 7 rotates along with the rotation, the belt member 7 is given a tension-side drive. Furthermore, during such an operation, when each V-shaped metal member 8 rotates due to engagement with each V-pulley 2, 4, the V-shaped metal members 8 tilt relative to each other; It was done smoothly using rollers.

More specifically, each V-shaped metal member 8 is composed of a relatively thick plate-like block, and is provided with a substantially U-shaped through groove 11 that opens outward, and in which the belt member 7 is connected. Furthermore, a stopper member 1 for preventing slippage is inserted between the left and right engaging grooves 12 and 12 at the upper part of the through groove 11.
3 is now available. Note that the belt member 7 is located approximately at the center of the V-shaped metal member 8.

Furthermore, each of the above-mentioned V-shaped metal members 8 has one on both outer sides.
It is of a type that is slidably supported inwardly and outwardly between the pair of elastic metal members 9, 9, and is provided with an engaging surface 14 facing the inner circumferential surface of the belt member 7, so that each V-shaped metal When the member 8 engages with each of the V-pulleys 2 and 4, it is pushed by the V-pulleys 2 and 4 and slides outward to engage the engagement surface 1.
4, it is pressed against the belt member 7 and is bound thereto.

More specifically, each V-shaped metal member 8 has concave surfaces 10, 10 on both sides, for example, as clearly shown in FIG.
is engaged with each elastic metal member 9, 9,
In this case, the concave surfaces 10, 10 are formed more or less longitudinally in the inward direction, that is, in the vertical direction in the drawing, and the member 8
is allowed to slide inward and outward within this range, so that when each V-shaped metal member 8 engages in the V-groove 3 of the V-pulley 2 on the drive side, for example, as shown in the figure, it is pressed against the V-shaped metal member 8. and slides outward to engage the engagement surface 14.
The belt member 7 is pressed into contact with the belt member 7 and bound thereto. To explain this further, in the case shown in the figure, the bottom surface of the above-described through groove 11 is the engaging surface 14, and each V-shaped metal member 8 is connected to each V pulley 2,
4, that is, in the straight portion of the V-belt 6, there is some gap 15 between the engagement surface 14 and the belt member 7, but when engaged with each V-pulley 2, 4, That is, at the curved portion of the V-belt 6, each V-shaped metal member 8 slides outward (upward in the drawing) as described above, and the engagement surface 14 and the belt member 7 are pressed against each other. state.

Although the above is not particularly different from what was previously proposed, according to the present invention, the belt member 7 is formed into a substantially V-shaped cross section that gradually narrows in the inner circumferential direction, that is, downward in the drawing, and The above-mentioned engaging surface 14 is formed to have a substantially V-shaped cross section substantially perpendicular thereto, so that when each V-shaped metal member 8 slides outward and is pressed against the belt member 7 as described above. , the engagement was performed on each substantially V-shaped surface to increase the binding force.

To explain this in detail, for example, as clearly shown in FIGS. 3 and 4, the belt member 7 has left and right tapered surfaces 7a, 7a and a straight surface 7b in between, while the engagement The surfaces 14 include left and right tapered surfaces 14a,
14a and a straight surface 14b in between, and as the V-shaped metal member 8 moves upward, the belt member 7 has left and right tapered surfaces 7a, 7a as shown in FIG.
, the left and right tapered surfaces 14a of the engagement surface 14,
14a and sandwiched therebetween, thus ensuring good binding.

Figures 5 and 6 show variations thereof.
In this case, the belt member 7 is arranged so that its straight surface 7b is also pressed against the straight surface 14b of the engagement surface 14.

This can be further modified, for example, as shown in FIGS. 7 and 8, in which case cutout parts 14c, 14c are formed at the left and right corners of the engagement surface 14, and thus the belt member 7 The innermost layer was designed to apply left and right lateral pressure. That is, in this case, the belt member 7 is made of a plurality of steel strips as described above, and the thickness of the belt member 7 is gradually made thinner toward the inner layer to improve flexibility, and the thinner innermost layer is made to have good flexibility. effect was eliminated, thus reducing its damage as much as possible.

In this way, according to the present invention, the belt member and each engagement surface of each V-shaped metal member have a cross section of approximately V.
They have a V-belt-V-groove type engagement with each other, and have the effect of increasing the degree of mutual bonding compared to a type in which they are simply pressed against each other on each plane.

[Brief explanation of the drawing]

FIG. 1 is a side view of one example of the device of the present invention, FIG. 2 is an enlarged cutaway side view of the engaging portion with the drive V pulley, and FIGS. 3 and 4 are the - line and -
5 and 6 are corresponding sectional views of a modified example thereof, and FIGS. 7 and 8 are sectional views of other modified examples. 2... Drive V pulley, 4... Driven V pulley, 6
...V belt, 7...Metal belt member, 8...V
shaped metal member, 9... elastic metal member, 10, 10...
...concave surface, 14...engaging surface, 7a, 7a...tapered surface, 14a, 14a...tapered surface.

Claims (1)

[Scope of Claims] 1. A plurality of V-shaped metal members and a plurality of elastic metal members are sequentially and alternately arranged in contact with each other on a metal belt member made of an endless steel band or other material. The elastic metal members are configured into a V-pulley, which is stretched between a driving-side V-pulley and a driven-side V-pulley to transmit power between both pulleys, and each elastic metal member is configured into a hollow roller. This is engaged with each concave surface formed on each pair of opposing surfaces on both outside sides, and is tightened from the outer periphery with the metal belt member, and by the tightening, each V-shaped metal member is connected through each elastic metal member. each V-shaped metal member is slidably supported in and out between each pair of the elastic metal members, and is opposed to the metal belt member. Each V with an engaging surface
When the metal belt member is engaged with a pulley, it is pushed by the pulley, slides outward, and is pressed against and bonded to the metal belt member at the engagement surface. The cross section becomes gradually narrower toward V
A V-belt transmission device formed in a V-shape, and the engagement surface is formed in a substantially V-shape in cross section to fit the engagement surface. 2. The V-belt transmission device according to claim 1, wherein each V-shaped metal member is provided with a through groove through which the metal belt member is inserted, and the bottom of the through groove is the engagement surface.