JPH0781610B2 - High load transmission belt - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high load transmission belt, and more particularly to a high load transmission belt used in vehicles such as automobiles and various mechanical transmissions.

[0002]

2. Description of the Related Art Conventionally, power transmission systems for high load transmission belts are generally classified into two types: push transmission and tension transmission. Among them, the push transmission type is a structure in which a plurality of block bodies are attached to an endless multi-layer steel band in a state of being in contact with each other, and these block bodies are slidable, for example, US Pat. No. 3,720,113. It is disclosed in the specification and the like.

This transmission system generally has a structure in which the block body is not fixed to the band and is slidably arranged on the band. When the block body is hung on both driving and driven pulleys, the belt is loosened. The block bodies gather, and the block bodies gathered on the loose side of the belt are pushed from the block bodies hanging on the drive pulley to rotate the driven pulley.

However, in the conventional belt using the push transmission system, a plurality of block bodies are not connected to each other and are individually mounted slidably on the band. In order to regularly introduce the block into the pulley, a means for regulating and aligning the position of each block body was necessary.

A belt satisfying this is Japanese Patent Publication No. 57-5.
As disclosed in Japanese Patent Publication No. 8543 or Japanese Patent Publication No. 55-100434, the protrusions provided on the front surface of each block body are housed in the guide grooves provided on the back surfaces of the adjacent block bodies, thereby self-aligning. Was being done.

[0006]

However, the block body used for such a belt is inclined in the direction in which it is separated from the rear block body according to the curvature when rotating on the pulley. At this time, interference between the projection provided on the block body and the guide groove is unavoidable, and the projection is accommodated in the guide groove with a clearance between the projection and the guide groove. Therefore, there is a problem that adjacent block bodies are loosened and it is difficult to align them correctly.

Further, when the block body is wound around the pulley, the projection may be dislocated from the guide groove due to a slight inclination of the block body. The block body rotated on the pulley in this state separates from the pulley and overlaps with the front block body. However, at this time, the projection may not be accommodated in the guide groove, and the block body may not be aligned. .

Further, as shown in FIG. 5, the belt 1 is
In general, a method of supplying lubricating oil from the inner peripheral direction of the belt by the oil supply nozzle 4 near the entrance of the driven pulley 3 is adopted. In this lubrication method, the lubricating oil is scattered in the outer peripheral direction of the pulley by the centrifugal force while the belt 1 rotates the driven pulley 3 and the drive pulley 2.

In such a lubricated state, each block body is positioned above the inclination start line while the belt is running, especially in the pushing transmission section where the block body reaches the driven pulley 3 by the drive pulley. However, there is a drawback that the block body is apt to be worn because it vibrates each other slightly while receiving high surface pressure and slides between the contact surfaces.

As a method of preventing the above wear, a method of increasing the area of the surface pressure portion to reduce the surface pressure per unit area can be considered, but increasing the block body area increases the belt weight. As a result, the tension increases especially during high-speed operation. As a result, the power transmission capacity of the belt is reduced, and a good effect cannot be obtained.

The present invention solves such a problem by ensuring the self-alignment function of the block body and, in addition, ensuring sufficient lubricity in the high surface pressure portion of the block body, thereby providing an extra pressure receiving area. It is an object of the present invention to provide a high load transmission belt in which the durability of the belt is remarkably improved by effectively preventing the wear of the block body without increasing the load.

[0012]

To achieve the above object, the present invention is characterized in that a head is formed in a block body through a pillar and a slot portion is provided between the body and the head. In a high-load transmission belt in which individual block bodies are arranged in parallel with each other with a gap or in close contact with each other, and an endless band is hung through the slot portions, protrusions and grooves are formed on the front and back surfaces of the block bodies. At least one pillar is provided with a pair of engaging members, and a fiber member serving as an oil retaining material is attached to at least one through hole provided in the head.

Of course, a fiber member serving as an oil retaining material may be attached to the upper and lower notches provided at the upper and lower corners of the pillar together with the through hole. Then, an oil groove for introducing the lubricant into the through hole and discharging the lubricant from the through hole is provided.

[0014]

In the high-load transmission belt of the present invention, since at least the pillars are provided with a pair of locking members consisting of a projection and a groove on the front surface and the back surface of the block body, self-alignment between the block bodies is possible. In addition, even if the block body enters the pulley and separates from the rear block body and tilts, the engagement relationship between the protrusion and the groove located on the pillar near the tilt start line is always maintained. There is no inconvenience caused by the non-fitting of the protrusion and the groove that occurs when the body leaves the pulley.

Further, at least one through hole provided in the head serves as a location for accumulating the lubricating oil, and by installing a fiber member as an oil retaining material in this through hole, the lubricating oil can be accumulated for a longer time. The lubricating oil oozing from the fibrous member lubricates the head surface of the block body to reduce the wear of the contact surface of the block body.

Further, when the fiber members are attached to the upper and lower cutouts provided at the upper and lower corners of the pillar, the lubricating oil supplied from below the block body in the vicinity of the driven pulley is sufficiently accumulated. Then, this lubricating oil is accumulated in the through hole while lubricating the head through the oil groove communicating from the upper cutout portion to the through hole, and when it further passes through the oil groove of the head through the through hole, the surrounding area is evenly distributed. While lubricating, it will flow out of the block body. This effectively exerts a lubricating function and significantly improves the wear resistance of the block.

[0017]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

High load transmission belt 10 shown here.
Is configured by slidably arranging a plurality of block bodies 20, an endless band 30, for example, a multi-layer steel band. Of course, the block bodies 20 may be arranged in close contact with each other, and the endless band 3
Pretension may be applied to 0.

Each block body 20 used here has a main body 22 having an inclined end surface 21 that abuts against the wall surface of the V pulley, a pillar 23 located at the center, and a chevron head 2.
4 and a pair of slot portions 25 for hanging the endless band 30, and the main body 22 has a tilt start line 4 on its front surface.
The taper surface 26 is provided downward from 0, and the block body rotating on the pulley can be inclined in the traveling direction according to the curvature thereof.

The pitch line P becomes a line when the block body 20 rotates on the pulley, and becomes an inclination start line 40 where the thickness of the main body starts to decrease.

The pillar 23 of the block body 20 is provided with a projection 31 at a position where the center line of the pillar 23 intersects with the neutral line m of the endless band 30, and a groove 32 is formed on the back surface at the same position.
Are arranged. The combination of the projection 31 and the groove 32 provided at the same position on the front surface and the back surface of the pillar 23 serves as a locking member 33, and prevents the block body 20 from being disturbed vertically and horizontally.

As shown in FIG. 3, the protrusion 31 and the groove 32 arranged at the above positions are inclined by the block body entering the pulley and further displaced to the minimum pulley diameter to taper the block body 22. This engagement relationship is maintained even when the surfaces 26 come into contact with each other.

In order to prevent the block body 20 from swinging around the longitudinal axis of the belt, as shown in FIG. 4, instead of a perfect circle, the cross-sectional shapes of the protrusions 31 and the grooves 32 are changed in the width direction of the block body. It may be an elongated elliptical shape or a rectangular shape.

Further, four R-shaped upper and lower cutouts 27 and 28 are provided at both upper and lower corners of the pillar 23 to form an oil reservoir. In particular, the lower cutout portion 28 has its lower corner portion substantially at the same position as the inclination start line 40.

Furthermore, a through hole 35 having a circular shape, an elliptical shape, a rectangular shape, a square shape, or the like is provided at a substantially central portion of the block body head 24, and a penetrating hole is provided between the through hole 35 and the R-shaped upper cutout portion 27. Between hole 35 and head top 36 and through hole 3
An oil groove 37 is arranged between the groove 5 and the protrusion 31. Lubricating oil absorbed from below the block body near the driven pulley is stored in a space surrounded by the endless band 30 and the lower cutouts 28 at both corners of the pillar to form an oil sump, from which the pillar is formed. Side wall 43 and end face 41 of the endless band
It moves to the upper cutout portion 27 via the space between and, and is accumulated in the through hole 35 while lubricating the head 24 while passing through the oil groove 37 opened in the vicinity by the centrifugal force.

Further, by passing through the oil groove provided in the head top portion 36 from the through hole 35, the surrounding area is also lubricated and flows out of the block body, so that the lubricating function is effectively exhibited.

In this embodiment, the through hole 35 provided in the head 24 has a diameter of 2 to 3 mm, and the oil groove 37 has a width of 0.4 to.
The depth is 0.8 mm and the depth is 0.2 to 0.4 mm. This degree is optimum from the viewpoint of lubrication performance and block strength, and lubricating oil is held in the through hole 35 and supplied to the normal oil groove 37. It will be possible. The path of the oil groove 37 may be lengthened in order to lubricate the head 24 in a relatively wide range.

A fibrous member 42, which serves as an oil retaining material, is attached to the through hole 35 and the upper and lower cutouts 27 and 28. This improves the adsorptivity of the lubricating oil, and the lubricating oil adsorbed on this can be constantly exuded in an appropriate amount. Therefore, the fibrous member 42 attached to the upper and lower cutouts 27 and 28 exudes the lubricating oil when the block bodies 20 move up and down by a small amount and the endless band 30 comes into contact with the upper surface and the lower surface of the slot 25. Thus, the lubricity between the endless band 30 and the block body 20 is improved.

Further, the lubricating oil oozing out from the fiber member 42 of the through hole 35 uniformly lubricates the head 24, which is the high pressure surface portion of the block body, through the oil groove 37.

The fibrous member 42 is a lump, such as a woven cloth, a knitted cloth, or a non-woven cloth made of natural fibers or synthetic fibers, or short fibers, which are attached to the through holes 35 and the upper and lower cutouts 27, 28 with an adhesive. Let Particularly, in the case of short fibers, they are planted on the adherend by spraying or the like.

[0031]

As described above, according to the present invention, by providing at least the pillars with a pair of locking members consisting of a projection and a groove on the front and back surfaces of the block body, self-alignment between the block bodies becomes possible. Since the locking member arranged at this position will always maintain its fitting even if it is separated from the block body and tilted, a mistake in refitting the projection and the groove does not occur.

Further, since the fibrous member serving as an oil retaining material is attached to the through hole provided in the head and the upper and lower cutouts provided in the upper and lower corners of the pillar, the lubricating oil can be accumulated in the fibrous member. Also, by constantly exuding this in an appropriate amount, the lubrication between the head, which is the high surface pressure portion of the block body, and the block body and the endless band is reduced, and the wear of the block body is reduced. If the lubricating oil is supplied to the, the fitting between the protrusion and the groove will be smooth, and the generation of abnormal noise will be greatly reduced.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a high load transmission belt of the present invention.

FIG. 2 is a view of FIG. 1 viewed from the back side.

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

FIG. 4 is a vertical cross-sectional view of another high load transmission belt.

FIG. 5 is a view showing a drive device for a general push transmission belt.

[Explanation of symbols]

 10 High-load transmission belt 20 Block body 22 Main body 23 Pillar 24 Head 27 Upper notch part 28 Lower notch part 31 Protrusion part 32 Groove part 33 Locking member 35 Through hole 37 Oil groove 42 Fiber member

Claims (3)

[Claims] 1. A head is formed on a main body of a block body through a pillar, and a plurality of block bodies provided with a slot portion between the main body and the head are arranged in parallel with each other with a gap or in close contact with each other. In the high-load transmission belt in which an endless band is hung through the slot portion, a pair of locking members having protrusions and grooves at the same position on the front surface and the back surface of the block body are used as at least pillars. A belt for high load transmission, characterized in that a fiber member serving as an oil retaining material is mounted in at least one through hole provided in the head. 2. The high-load transmission according to claim 1, wherein a fiber member serving as an oil retaining material is attached to the upper and lower notches provided in the upper corner portion and the lower corner portion of the pillar together with the through hole. belt. 3. The high load transmission belt according to claim 1, wherein an oil groove for introducing lubricating oil into the through hole and an oil groove for discharging the lubricating oil from the through hole are provided on at least one surface of the head.