JPH0333544A - Power transmission ring body and ring system power transmission device - Google Patents

Abstract

PURPOSE:To prolong life of a ring body and a device without generating noise and make quiete transmission of high load possible by using a ring body consists of a rigid body wherein an elastic body is interposed in the inner part for transmission of power. CONSTITUTION:A power transmission ring body 1 is constructed by laying outer rings 4 having inclined surfaces 4b on one side interposing circle-shaped elastic bodies 3 having nearly the same diameter as inner rings 2 upon both side surfaces of the inner rings 2. By interposing the elastic bodies 3 like this, the outer ring 4 deform as if elastically parallel to the shape of pulley when received lateral pressure from the side of pulley. Therefore, as the touch area between pulley and the ring body becomes extremely larger than the case where rings wholly made of only rigid body are used, and the surface pressure between the pully and the ring body becomes low, wear of the pulley and the outer ring is reduced, as well as the transmission capacity is largely enhanced by the enlargement of the touch area between the ring body and the pulley.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a ring body for transmitting power by hanging the ring body on a pulley, and a power transmission device using the ring.

(Prior art) In a mechanism that transmits power by installing V-pulleys on the drive shaft and the driven shaft, a flexible belt made of rubber, resin, etc., or a chain-type belt made of metal is usually hung between the two pulleys. There is. Belts made of rubber, resin, etc. have tensile bodies made of various fibers embedded inside them, and efforts are being made to extend their lifespan by improving the rubber composition, but even so, there are limits.

In the case of metal belts, they have a structure in which a large number of metal pieces are connected at a constant pitch to give them flexibility, so they make a lot of noise when running, and there is a limit to long life due to frictional heat generation and wear at the joints. There is.

Therefore, by adopting a method of transmitting power by suspending a ring body made of a rigid metal body from a V-pulley, an extremely long-life power transmission device that is a one-piece unit with no connecting parts and has the strength of metal can be created. Obtainable.

(Problem to be solved by the invention) Since the ring body is made of a rigid body, sufficient strength can be obtained, but since it is a rigid body, the contact between the pulley and the ring body is almost linear. If contact occurs and a large torque is to be transmitted, the slip rate will increase, so the surface pressure at the contact area between the pulley and the ring body must be considerably high, which can lead to wear on the pulley and ring body. That was its biggest drawback.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a power transmission ring or a ring-type power transmission device that eliminates the above-mentioned drawbacks, has an extremely long life, and is capable of transmitting large amounts of power.

(Means for Solving the Problem) In order to achieve such an object, the present invention provides a ring body that is suspended between a plurality of V pulleys and transmits power from a drive shaft to a driven shaft. It is characterized by being composed of a ring and an outer ring integrally provided on both sides of the inner ring via an elastic body.

In addition, a ring-type power transmission device in which the above-mentioned power transmission ring body is provided with a pulley having a V groove on the drive shaft and the driven shaft, and suspended between both pulleys, and also provided on the drive shaft and the driven shaft. A variable speed pulley in which a pulley having a groove forms a V-groove with a fixed pulley piece that is fixed to the shaft and rotates together with the movable pulley piece that is supported on the shaft and is fixed in the rotational direction and movable in the axial direction. It also includes a ring-type power transmission device with supporting rollers or idler pulleys.

(Function) Since the ring body is configured such that the inner ring is made of a rigid body and the outer ring is provided with an elastic body interposed, the outer ring deforms due to the lateral pressure from the pulley, causing the shape of the inner wall of the pulley to change. The contact area between the ring body and the pulley increases.

Furthermore, since a non-flexible ring body is used in the continuously variable transmission device, the movement of the ring body during gear changes is smooth and the response is good.

Furthermore, since the side surfaces are continuous surfaces, running in contact with the pulleys is smooth and noisy.

(Example) FIG. 1 is a sectional view of a power transmission ring body of the present invention,
FIG. 2 is an enlarged view of section A in FIG. 1. The power transmission ring body (1) has an inner ring (2) on both sides of the inner ring (2).
2) It consists of an outer ring (4) having an inclined surface (4b) on one side, which is stacked on top of the other with a circular elastic body (3) having the same diameter interposed therebetween. In this embodiment, a metal disk spring is used as the circular elastic body (3), and the inner ring (2) and the elastic body (3)
) The outer ring (4) can slide and rotate, but in order to prevent each member from shifting, the inner ring (2) outer periphery and outer ring (4) inner periphery are attached as shown in the figure. The stepped portions (2a) and (4b) are provided for mutual positioning.

By fully interposing the elastic body (3) in this way, when receiving lateral pressure from the pulley, the outer ring (4) elastically deforms to follow the shape of the pulley, as shown in Figure 3.
The contact area between the pulley and the ring body is much wider than when a ring made entirely of rigid bodies is used, and the surface pressure between the pulley and the ring body is lower, reducing wear on the pulley and outer ring and reducing the wear on the ring body. By increasing the contact area between the pulley and the pulley, the transmission capacity is also greatly improved.

Here, the elastic body (3) is a circular disc spring in this embodiment, but when the outer ring (4) is pressed by the pulley, it deforms, reducing the surface pressure between the pulley and the ring body, and Any material that can achieve the effect of increasing the contact area may be used, and it is also possible to use a metal chrysanthemum spring or an elastic body (3) made of polyurethane, rubber, resin, or the like. Power transmission ring (1) when using an elastic body (3) made of polyurethane, rubber, resin, etc. other than metal
) may be glued together or fixed with fixing materials such as rivets or bolts, or they may be made to be able to slide and rotate relative to each other by simply overlapping each other as in this example. You can.

FIG. 3 is a front view of a ring type power transmission device in which a power transmission ring body is wound around a pulley.

In Fig. 3, (1) is a ring body for power transmission, and V pulleys (7) (
8) is provided. The power transmission ring body (1) has a structure in which the elastic body (3) is interposed between the inner ring (2) and the outer ring (4) as described above, and the ring body (1) is connected to the pulley. As shown in Fig. 4, the outer ring (4) deforms minutely to follow the shape of the pulley (9) due to the lateral pressure of the pulley (9), as shown in Fig.
3) reduces the surface pressure between the pulley (9) and the ring body (1), and the contact area increases due to deformation, which improves the problem of wear between the pulley (9) and the ring body (1). ,
Furthermore, it is possible to lower the slip ratio and increase transmission capacity and efficiency. Furthermore, FIG. 5 shows a ring type power transmission device using a power transmission ring body for a continuously variable speed pulley.

This device (20) has a driving shaft (21) and a driven shaft (22) equipped with a fixed pulley piece (23) that is fixed to each shaft and rotates integrally with the shaft, and a movable pulley piece (24) that is slidable in the axial direction. Although not shown, a coil spring fixed to a spring receiver with one end fixed to the shaft may be installed on the rear side of the movable pulley piece (24), or the movable pulley piece (24) may be fixed to the shaft using hydraulic cylinder thrust, centrifugal thrust, or a combination thereof. The groove width of the V-pulley is changed to perform stepless speed change.

In this case as well, when the aforementioned power transmission ring body (1) is suspended, the structure of the elastic body (3) interposed between the inner ring (2) and the outer ring (4) causes a gap between the ring and the pulley. The surface pressure of the pulley is reduced, and the outer ring (4) has a larger contact area along the shape of the pulley, making it possible to lower the slip ratio. In addition, in such a continuously variable transmission, when changing gears,
That is, when the groove width of the pulley changes, a difference in rotational speed between the left and right pulley pieces (23) and (24) occurs due to misalignment, which causes problems such as wear in the case of conventionally used belts. However, the ring body (1) in which the left and right outer rings can slide and rotate relative to each other has the advantage that the difference in rotational speed between the left and right sides is absorbed by the ring body (1). Also, in the case of a ring (1) that cannot slide or rotate, the ring body (1) uses rubber or resin as the elastic body (3).
The difference in rotation can be absorbed to some extent by the resin part.

FIG. 6 is a diagram showing a modified embodiment of the ring type power transmission device, in which the pulley (33) of the drive shaft (31) and the driven shaft (32) is shown.
) In addition to (34), a pressing roller or idler (35) for supporting the ring body (1) is provided.

By making the rotating shaft of the pressing roller (35) movable by external force, the ring body (1) and each pulley (33
) (34) It can be used as a speed change means to adjust the rotation ratio between (34) and (34). In the example shown in Figure 6, the ring body (
A pressure roller (
35), but the ring body (1) may be pressed from top to bottom by two pressing rollers on the outside of the ring body (1), or the ring body (1) may be pressed from above to the bottom near the bottom of the ring body (1). (
It is also possible to install it inside or outside of 1).

9-4゜(Effects) In the power transmission ring body or ring type power transmission device with the above configuration, a ring body made of a rigid body is used for power transmission, so the ring body does not generate noise and can be easily used. The lifespan of the body is extremely long, the lifespan of the equipment is also extended, and high load transmission is possible in a quiet manner.

In addition, in the present invention, the structure of the power transmission ring body is such that an elastic body is interposed inside, so that the outer ring is slightly deformed along the shape of the pulley due to the lateral pressure from the pulley. In addition to lowering the pressure, the contact area expands and high load transmission becomes possible. In addition, when used in a continuously variable transmission device, in addition to the above-mentioned effects, the ring body can also absorb the difference in rotational speed between the left and right pulley pieces during gear changes, further extending life and improving rolling efficiency. , contributes to noise reduction.

Further, by providing a pressure roller, the transmission capacity can be expanded and a speed change function can be provided by moving the pressure roller.

[Brief explanation of drawings]

10 Fig. 1 is a sectional view of the power transmission ring body of the present invention, Fig. 2 is an enlarged view of section A in Fig. 1, Fig. 3 is a front view of the ring type power transmission device, and Fig. 4 is a power transmission ring. FIG. 5 is a cross-sectional view of a continuously variable ring type power transmission device, and FIG. 6 is a front view of another embodiment of the ring type power transmission device. (1) ... Power transmission ring body (2) ... Inner ring (3) ... Elastic body (4) ... Outer ring (5 (21) (31) ... Drive shaft (6 ) (22) (32) ... Driven shaft (7) (8
) (9) (33) (34)...Pulley (23)
...Fixed pulley piece (24)...Movable pulley piece (35)...Press roller

Claims (1)

[Claims] 1. A ring body that is suspended between a plurality of V pulleys to transmit power from a drive shaft to a driven shaft, which includes an inner ring made of a rigid body and elastic bodies on both sides of the inner ring. and an outer ring having an inclined surface on one side provided through the ring, and the elastic body is sandwiched between a step part extending to the inner ring and a step part extending to the outer ring. Transmission ring body. 2. The driving shaft and the driven shaft are each provided with a pulley having a V groove, and the pulley is comprised of an inner ring made of a rigid body between both pulleys, and an outer ring provided on both sides of the inner ring with an elastic body interposed therebetween;
The elastic body is a ring type power transmission device in which a power transmission ring body is suspended between a step part extending on an inner ring and a step part extending on an outer ring. 3. At least one of the pulleys having a V groove provided on the drive shaft and the driven shaft is fixed to the shaft and rotates integrally with the fixed pulley piece, and the movable pulley is supported on the shaft and is fixed in the rotational direction and movable in the axial direction. 3. The ring type power transmission device according to claim 2, wherein the ring type power transmission device is a variable speed pulley in which a V groove is formed by the pieces.