JPH03209036A - High-load transmission belt - Google Patents

Abstract

PURPOSE:To ensure self-aligning of a belt by equipping one of the blocks on the front and rear sides with a projection consisting of a rod-shaped ridge, and allowing the other block to have an accommodation part consisting of a through hole. CONSTITUTION:One of the blocks 20a is equipped on the front and rear sides with a projection 40 consisting of a rod-shaped ridge, while the other block 20b has an accommodation part 50 in which the projection 40 is to be fitted. These blocks 20a, 20b are arranged alternately. Fitting of the projection 40 in the accommodation part 50 restricts each block from vertical movement, tilting to the left or right, and dislocation to the left or right, and the blocks behave in a single piece to intrude into a pulley. Thus collision noise of belt with pulley is reduced to ensure that the belt is self-aligned.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to high-load power transmission belts, particularly high-load power transmission belts used in vehicles such as automobiles and various mechanical transmission devices.

(Prior Art) Conventionally, power transmission systems for high-load transmission belts are generally classified into two types: compression transmission and tension transmission.

Among them, the compression transmission type has a structure in which a plurality of blocks are attached to an endless multilayer steel band in contact with each other, and these blocks can be slid, for example, as described in U.S. Pat. No. 3,720,113. It is disclosed in the specification etc. This transmission system generally employs a structure in which the block bodies are not fixed to the band, but are arranged so that they can slide on the band. When the bodies gather together, the block bodies hanging on the driving boot push the blocks gathered on the loose side to turn the driven boot.

However, in conventional belts using the above-mentioned transmission method, a plurality of block bodies are not connected to each other, but are individually attached to be slidable on the band. For this reason,
In order to correctly introduce each block body into the booth, a means for regulating and aligning the position of each block body is required.

A belt that satisfies this requirement is disclosed in Japanese Patent Publication No. 57-58543 or Japanese Patent Publication No. 55-100443, in which protrusions provided on the surface of each block are attached to the back surfaces of adjacent block bodies. Self-alignment was achieved by being accommodated in a provided guide groove.

Furthermore, Japanese Patent Application Laid-Open No. 64-3347 discloses that an arm protruding from the side wall of the head of the first block body and two arms protruding from the side wall of the head of the second block body are provided, and a recess is formed between them. It is disclosed that the blocks are self-aligned by fitting the arms of one block into the recesses of the second block.

(Problems to be Solved by the Invention) However, when the belt wraps around the boob, the adjacent block bodies tilt so as to be slightly separated from each other in the direction of movement. At this time, interference between the protrusion provided on the block body and the guide groove is unavoidable, and the protrusion is inevitably accommodated in the guide groove with a clearance between the protrusion and the guide groove.

Adjacent block bodies have looseness and are difficult to align correctly.

Furthermore, when the block bodies are wrapped around the boob, they will come off as soon as they are slightly tilted to each other, so it has been proposed to increase the distance between the slope line provided on the front of the block body and the protrusion. However, in reality, this distance cannot be increased beyond a certain range (about several millimeters) due to the size constraints of the block body. Furthermore, both the height of the protrusion and the depth of the guide groove cannot be set to sufficient dimensions due to limitations on the thickness of the block body. Therefore, if the distance between adjacent block bodies becomes large, there is a possibility that the blocks will be separated from each other and cannot be aligned.

Furthermore, when manufacturing a block body, it is not only technically difficult to accurately form small protrusions and guide grooves on the back surface of the thin block body, but it is also economically disadvantageous. Ta.

The present invention addresses and improves the above-mentioned problems, and in particular, protrusions and
The purpose is to ensure the self-alignment function of the belt by restricting the free movement of the block body without providing a guide groove.

←Means for Solving the Problems) In order to achieve the above object, the present invention has a feature that a head is formed on the block main body via a pillar.
In a high-load power transmission belt in which a plurality of block bodies each having a slot portion between the main body and the head are arranged in parallel, and an endless band is suspended through the slot portion, two types of block bodies are used together, and one of the blocks is The body is provided with protrusions consisting of rod-shaped protrusions on its front and back surfaces, and the other block body has an accommodating portion that penetrates the surface,
The above-mentioned two types of block bodies are arranged alternately, and one block body has protrusions consisting of plate-like pedestals on the front and back surfaces of the head, and the other block body has a notch-shaped protrusion on the head. It also includes a structure in which the block bodies are arranged alternately.

Furthermore, the present invention also includes a case where the bottom surface of the protrusion and the shelf surface of the notch-shaped accommodating section are curved in an arch shape or bent in a V shape.

(Function) Block bodies each having protrusions made of rod-shaped protrusions on the front and back surfaces of the block bodies, and block bodies having accommodation parts consisting of through holes for receiving these protrusions, are arranged alternately. However, when these block bodies come into contact with each other and are combined, the block body having protrusions on both sides is held between the block bodies having the accommodating part, and the protruding part is fitted into the accommodating part. Therefore, the left and right tilt of each block body,
The deviation is regulated, and each block body moves in unison to enter the boley, and the collision noise between the block body and the boley at this time is also reduced.

Furthermore, when a block body having a protrusion made of a plate-shaped base and a block body having a notch-shaped accommodating part are used together, the bottom surface of the protrusion and the shelf surface of the accommodating part come into wide surface contact and cause interference. Their movements are also restricted. In particular, if the bottom surface of the protrusion and the shelf surface of the accommodating section are both curved in an arch shape or bent in a V shape, the deviation is reliably regulated.

Further, the protrusion formed by the plate-shaped platform can be easily installed on the shelf surface of the storage section, and the blocks can come into contact and be separated without interfering with each other.

(Example) Hereinafter, further examples of the present invention will be described with reference to the accompanying drawings.

The high-load transmission belt 1 shown here is constructed by alternately arranging two types of block bodies 20a and 20b and arranging them so as to be slidable on an endless band 30, for example, a multilayer steel band. has been done.

Each of the block bodies 20a and 20b used here includes a main rest 22 having an inclined end surface 21 that contacts the V-boot wall surface, a billet 23 located approximately in the center, and a chevron-shaped head 2.
The main body 22 has a pair of slot portions 25 on which the endless band 30 is hung, and the main body 22 has a tapered surface 26 on the front surface below the pitch Hp to facilitate bending of the belt.

Further, on the upper side of the taber surface 26 of the main body closer to the billet 23 than the pitch line P, there is an end surface 21 inclined from the pitch MP.
At least one bias-shaped oil groove 27 communicating with the block body 20 is provided, and oil is constantly supplied between the inclined end face 21 and the V-boole wall surface to prevent wear and heat generation between the block body 20 and the booley.

The head 24 of the block body 20a has a projection 4.
0, a straight bar-shaped protrusion is provided in the width direction of the block body and protrudes from the front surface, and a similar protrusion 40 is located on the back surface at the same height as the protrusion 40 on the front surface. ing.

On the other hand, the other block body 20b has an elongated accommodating portion 50 penetrating the head 24 through its surface.

The accommodating portion 50 is adapted to receive the protrusion 40 provided on the block body 20a. That is, the protrusion 40 provided on the head 24 of one block body 20a is fitted into the accommodating portion 50 provided on the head 24 of the other block body 20b, and each block body 20a, 20b is connected to the head 24 and the billboard.
When the blocks 20a and 20b are brought into surface contact at 23, movements such as lateral displacement and inclination of the block bodies 20a and 20b are restrained.

It is preferable that the length of the protrusion 40 is at least larger than the width of the billet 23. This is because increasing the length of the protrusions is advantageous in preventing horizontal inclination of the block bodies 20a, 20b.

The high-load transmission belt shown in FIGS. 4 to 6 is the same as the belt ellipse shown in FIG. 1, but with a block body 20a.
, 20b are different in shape. In the block body 20a of this embodiment, there is a thick protrusion 40 on the front and back surfaces near the top of the block head 24, which is a symmetrical plate-shaped platform having a bottom face 42 shaped like a square. On the other hand, in the other block body 20b, a notch-shaped accommodating portion 50 having a V-shaped shelf surface 51 is provided near the top of the head 24.

When such block bodies 20a, 20b come into contact with each other, the protrusions 40 of the block bodies 20a, 20a will cause the block body 2 located between these block bodies 20a, 20a to
The block bodies 20a, 20b are placed on the shelf surface 51 of the notch-shaped storage portion 50, and the left and right displacement, left and right inclination, and vertical movement of each block body 20a, 20b are restricted. behave as one.

Incidentally, even if the bottom surface 41 of the protruding portion 40 consisting of the plate-shaped platform and the shelf surface 51 of the accommodating portion are curved in an arch shape, the block body is surely prevented from shifting in the left-right direction. In addition, in this embodiment, when the block rest 20a120b comes into contact, the protrusion 4o located on the shelf surface 51 of the housing part of the block body 20b,
4o is far away. However, by increasing the amount of protrusion of the protrusions 40, it is possible to bring these protrusions 4 into contact with each other, but if the amount of protrusion of the protrusions 40 is made too large, the weight of the head 24 increases and the block The center of gravity of the body shifts to the head side, making the block body unstable.Therefore, the protrusion amount of the protrusion 4o is 30 to 30% of the thickness of the block body head 24 (the area excluding the protrusion 4o and the accommodating part 50).
It will be about 50%.

Furthermore, in the present invention, the bottom surface 41 of the protrusion and the shelf surface 51 of the notch-shaped accommodating portion may be flat surfaces. In this case as well, since the bottom 41 and the shelf surface 51 make surface contact with each other over a wide range and interfere with each other, the left and right deviations of the respective block rests 2Qa and 20b,
Movements such as tilting are restricted.

Further, FIGS. 7 and 8 show other embodiments of the block body, and in this embodiment, one block body 20
The head 24 of the block body 20b is provided with a protrusion 4o consisting of a symmetrical chevron-shaped plate-like platform having an arched bottom surface 41 on its front and back surfaces, and the head 24 of the other block body 20b is provided with a protrusion 4o on its front and back surfaces. The bottom surface 41 of the protrusion 4o is
A step-shaped housing portion 50 is formed with a shelf surface 51 having the same shape as the above, and the head 24 above the shelf surface 51 is a thin wall portion. When such block bodies 20a and 20b come into contact with each other, one of the block bodies 20a and 20b comes into contact with each other, as shown in FIG.
The bottom surfaces 41 of the protrusions 40, 40 are placed on the shelf surface 51 of the other block body, and the block bodies 20a, 20b are in full contact above the pitch line P, and the left and right deviations and left and right tilts of each block body are prevented. , and vertical movement is reliably regulated, and each block body 20a, 20b behaves as one.

The shape of the bottom 41 of the protrusion 40 and the shelf surface 51 of the accommodating part 50 is not limited to the above-mentioned arched shape, but may be a circular arc, a part of an ellipse, or a shape bent into a triangular shape. You can.

Furthermore, as shown in FIGS. 10 and 11, the bottom surface 41 of the protrusion 40 and the shelf surface 51 of the accommodating portion 50 may be V-shaped or arch-shaped. It may have a curved or bent shape. Each block body 20 has a protrusion 40 and a housing 50 having such a curved shape.
Also in a and 20b, displacement in the left and right direction is reliably prevented.

(Effects) As described above, in the high-load transmission belt of the present invention,
One block body has protrusions made of bar-shaped protrusions on its front and back surfaces, the other block body has a housing part made of a shopping hole, and these block bodies are arranged alternately in an elliptical or Because of this, the protrusions made of the bar-shaped protrusions fit into the accommodating portions, thereby restraining the vertical movement, left-right inclination, and left-right displacement of the individual block bodies, The block body moves as one and enters the boley, which reduces the collision noise between the belt and the boley and ensures self-alignment of the belt.

In addition, the protrusion consists of a plate-like base, the bottom surface of which is a block body that is curved in an arch shape or bent in a ■ shape, and the storage part is a notch shape, and the shelf surface is arch-shaped. Even when using a block body having a shape that is curved or bent in a square shape, the left and right displacement and left and right inclination of each block body are reliably controlled. Moreover, the protrusion is easily installed in the housing, and the blocks come into contact and are separated without interfering with each other.

[Brief explanation of drawings]

Figure 1 is a side view of a high-load transmission belt according to the present invention, Figure 2 is a perspective view of one block used in the belt, and Figure 3 is another block used in the belt. Fig. 4 is a side view of another high-load power transmission belt, and Fig. 5 is a perspective view of one block body of the belt shown in Fig. 4 when viewed from the front side. 6 is a perspective view of another block used in the belt shown in FIG. 4, FIG. 7 is a perspective view of yet another block, and FIG. 8 is a perspective view of another block used in the belt shown in FIG. FIG. 9 is a perspective view of another block body used together with the block body when viewed from the back side. FIG. 9 is a side view of another high-load power transmission belt using the block body shown in FIGS. 7 and 8. FIG. 10 is a perspective view of another block body, and FIG. 11 is a perspective view of another block body.
FIG. 7 is a perspective view of another block for use with the block shown in the figure. 1... High load transmission belt 20... Block body 22... Main body 23... Pillar 24... Head 30... Endless band 40... Protrusion 41... Bottom surface 50.・Accommodating part 51 ・Shelf surface

Claims (1)

[Claims] 1. A head is formed on the block body via a pillar,
In a high-load transmission belt in which a plurality of block bodies each having a slot portion between the main body and the head are arranged in parallel, and an endless band is suspended through the slot portion, two types of block bodies are arranged alternately, and one of the two types of block bodies is arranged alternately. A belt for high-load power transmission, characterized in that one block body has protrusions made of bar-shaped protrusions on its front and back surfaces, and the other block body has a housing portion into which the protrusions are fitted. . 2. Form a head on the block body via a pillar,
In a high-load transmission belt in which a plurality of block bodies each having a slot portion between the main body and the head are arranged in parallel, and an endless band is suspended through the slot portion, two types of block bodies are arranged alternately, and one of the two types of block bodies is arranged alternately. For high-load transmission, characterized in that one block body has protrusions consisting of plate-like pedestals on the front and back surfaces of the head, and the other block body has a notch-shaped accommodating part in the head. belt. 3. The bottom surface of the protrusion consisting of the plate-shaped platform provided on the front and back surfaces of one block body head is curved in an arch shape or bent in a V shape, and the bottom surface of the protrusion formed in the shape of a notch provided on the other block body head. 3. The high-load power transmission belt according to claim 2, wherein the shelf surface of the accommodating portion is similarly curved in an arch shape or bent in a V shape.