JPS58149437A - V-belt - Google Patents

Abstract

PURPOSE:To enable the employment of a multi-layered band having a large dimension in width and thereby to ensure the sufficient durability of a V-belt by a constitution wherein folded parts for positioning are provided at the edges in the width direction of the main body of a block. CONSTITUTION:In a V-belt for transmitting an action which consists of a composite band 12 constituted by superposing a plurality of endless circular bands, and of a number of blocks 11 assembled slidably with the composite band 12 and each having a slope contacting with a pulley at the end, folded parts 11d and 11e are provided in parts of the edges in the width direction of the main body of a bkock 11, and the blocks 11 are lined up sequentially in such a manner that the folded parts of the blocks in front are fitted in dents formed by the folded parts of the blocks in the rear, and then are assembled with the composite band 12.

Description

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

Conventional V-belts include those shown in FIGS. 1 to 3. As shown in FIG. 1, the V-belt 1 is used by being wound around two pulleys 2 and 3, each having a variable V-shaped groove interval. , and a number of blocks 5 connected to this layered band 4. As shown in FIGS. 2 and 3, the block 5 has a substantially trapezoidal plate shape with slopes 5a that contact the pulleys on both sides, and a layered band 4 on the top.
A four part 5'b is formed for coupling with. In addition,
A support pin 5e is attached to the upper part of the recess 5b after being combined with the layered band 4. The block 5 has a projection 5c on one surface and a depression 5d at the same position on the other surface.

Adjacent blocks 5 are positioned by sequentially fitting the protrusions 5C and the recesses 5d.

A V-belt 1 is constructed by assembling a large number of such blocks 5 adjacent to each other over the entire circumference of the layered band 4.

However, in such a conventional V-belt, as mentioned above, the protrusions 5C and depressions 5d for aligning the blocks 5 with each other are provided by press working on the parallel plane parts of the blocks, so that the blocks are in stable contact with each other. In order to ensure the flatness of the parallel plane part as shown in FIG. was there. In other words, sentence≧(1/2
)・t. Therefore, as the plate thickness t of the block increases, it is necessary to increase the width direction dimension of the parallel plane portion. Therefore, when the width W of the block is constant, as the plate thickness t of the block increases, the dimension of the parallel plane part increases, and the width B of the layered band has to be reduced (the width W of the block is ■The size of the pulley is determined by the size of the pulley, which is restricted by the overall size of the belt type continuously variable transmission, and cannot be increased freely, and the block thickness t is also a constant value to resist the pushing force of the pulley. or more is required). Therefore, there was a problem that the strength of the layered band 4 was smaller than the applied tensile stress, resulting in insufficient durability.

The present invention has been made by focusing on the problems noted in L in conventional V-belts, and solves the above problems by providing a folded portion for positioning on the widthwise edge of the block body. The purpose is to

Hereinafter, the present invention will be explained based on FIGS. 4 to 9 of the accompanying drawings showing embodiments thereof.

First, the configuration will be explained.

4-6 show a block 11 of a V-belt according to the invention. The block 11 has a substantially trapezoidal plate shape with slopes 11a that contact the pulleys on both sides, and four parts 11b for connecting with the layered band 12 are formed on the upper part by guide walls on both sides. ing. Note that after assembling the layered band 12 in the recess flb, support pins li are attached to both guide walls.
Folded parts lid and lle are provided at the outer edge of the guide wall where e is driven and the block 11 is prevented from falling off. The folded parts lid and lie are press-formed using a punch whose tip has a triangular cross section, and are partially broken and bent rearward according to the shape of the punch.

Therefore, a depression is formed on the front side of the folded portions lid and lie, and a protrusion is formed on the rear side.

7 and 8, a large number of blocks 1 having the above-mentioned shape are shown.
1 is assembled into a layered band 12. Since the folded portions of the front blocks fit into the recesses of the folded portions of the rear blocks in sequence, the blocks 11 are reliably aligned. In this way, the blocks 11 are placed all around the layered band 12.
By assembling, the V-belt 10 is completed.

FIG. 9 shows a state in which the V-belt 10 manufactured as described above is wound around pulleys 2 and 3. The friction force between one pulley and the slope of the block is transmitted through the block, and the other pulley is driven by the friction force between the slope of the block. (2) In the portion where the belt 10 is linear (that is, the portion not in contact with the pulleys 2 and 3), the folded portions of each block fit into each other and are aligned. ■The part where the belt IO has a curved shape (
In other words, in the parts that are in contact with pulleys 2 and 3),
The folded portions of each prong are uncoupled and each block is tilted along the circumference of the pulley. However, each block 1
1 is held on the layered band 12 by a support bottle llc and will not fall off.

As described above, according to the present invention, a folded part is provided on a part of the widthwise edge of the block body, and the folded part of the front block fits into the recess formed by the folded part of the rear block. Since each block is aligned in sequence and assembled into a layered band, it is possible to use a layered band with a width larger than conventional ones for blocks of the same block width and plate thickness, and it has sufficient durability. This has the effect of ensuring that

[Brief explanation of drawings]

Fig. 1 is a diagram of a conventional V-belt type transmission device, Fig. 2 is a front view of a conventional V-belt block, Fig. 3 is a side view of the block shown in Fig. 2, and Fig. 4 is a V-belt according to the present invention. 5 is a plan view of the block shown in FIG. 4, FIG. 6 is a side view of the block shown in FIG. 4, FIG. 7 is a view of the V-belt according to the present invention, and FIG. 8 is a front view of the block of the belt. 9 is a plan view of the V-belt shown in FIG. 7, and FIG. 9 is a diagram showing how the V-belt according to the present invention is used. 10・φ・V belt, ti@・φ block, 11a...
ψ slope, llb... recess, llcφ/ψ support bin, l
ld, lle...folded part, 12/Φ/layered band. Patent applicant Nissan Motor Co., Ltd. agent
Patent Attorney Toshiyuki Miyauchi 11251y Sda ■ S7 Diagram II 6 Diagram

Claims (1)

[Claims] A power transmission device comprising a layered band formed by overlapping a plurality of endless annular bands, and a number of blocks that are slidably assembled to the layered band and have sloped sides that come into contact with pulleys. In the V-belt, a folded part is provided on a part of the widthwise edge of the block body,
A V-belt characterized in that the blocks are sequentially aligned and assembled into a layered hand so that the folded part of the front block fits into the recess formed by the folded part of the rear block.