JPS62180141A - Transmission belt - Google Patents

Abstract

PURPOSE:To prevent V-shaped blocks from being damaged, noise from being produced and abnormal wear from occurring by connecting at least part of the V-shaped blocks rigidly to a pin as well as arranging rugged surfaces on all of the V-shaped blocks for preventing relative lateral displacements. CONSTITUTION:A V-shaped block 4 is made in a shape embracing link connection bodies 3 in the lateral direction and consists of block parts 4a and 4b divided with a bisectional surface of the width of a V-groove 8 of a pulley. After press-fitting both ends of a pin 1 into respective dead-end holes 4c and 4d, the block parts 4a and 4b are joined together with a weld 5 so that each of the V-shaped blocks 4 in rigidly connected to the pin 1. The V-shaped block 4 is further provided on its either side with a recess 6 and a projection 7 respectively extending in the longitudinal direction of link connection bodies 3 so that the V-shaped blocks 4 prevent each other from displacing laterally in the longitudinal direction of the pin 1 by means of mutual fitting of the recess 6 and the projection 7.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to (1) an endless power transmission belt that is used by being passed between grooved pulleys.

(Prior art) As this type of power transmission belt, the conventional Japanese Patent Publication No. 58-22652
As shown in the publication, a link connecting body is provided in which a large number of pins are connected to each other by link plates, and ■-shaped blocks are sequentially driven and connected to this link connecting body in the longitudinal direction. Some configurations are known.

In such types of power transmission belts, at least a portion of the V-shaped block is often attached to the above-mentioned pin to provide a driving connection to the link connection.

(Problem to be solved by the invention) However, in this case, in conventional power transmission belts, at least some of the ■-shaped blocks mentioned above were attached to both ends of the pins so that they could rotate within the belt running plane. When the pin is subjected to bending stress between the medium V-shaped block and the link connection body, the bending stress is supported only by the bending strength of the pin itself, so the diameter of the pin must be increased for strength, and the transmission I couldn't avoid making the belt thicker.

On the other hand, due to the above-mentioned structure of the transmission belt, it is inevitable that the square block deviates laterally in the longitudinal direction of the pin relative to the pin, and together with this pin relative to the screw connection body. This lateral shift does not occur when the V-shaped block is in the groove of the pulley, but occurs because the position of the V-shaped block is not restricted in the longitudinal direction of the pin when it is on the straight portion of the belt between the groove pulleys.

Such lateral displacement of the V-shaped block is caused by the fact that when the ■-shaped block is rolled into the pulley ■ groove, it becomes misaligned with the said ■ groove, causing the ■-shaped block to collide with the side surface of the pulley V-groove, causing damage to the V-shaped block. , causing abnormal wear and noise.

(Means for Solving the Problem) The present invention solves the former problem by rigidly connecting at least some of the V-shaped blocks to each other instead of making them rotatable around pins. The latter problem was solved by providing unevenness to prevent the matching bottles from shifting laterally relative to each other in the longitudinal direction of the bottles.

(Function) ■During the actual use of the transmission belt passed between the grooved pulleys, the bending stress that acts on the pin between the ■shaped block and the link connection body is due to the rigid connection between the ■shaped block and the pin. , is supported not only by the bending strength of the bottle itself but also by the deformation strength of the ■-shaped block.

Therefore, the bending strength of the pin can be reduced accordingly, and the diameter can be reduced, allowing the transmission belt to be made thinner.

In addition, all ■-shaped blocks are prevented from relative lateral displacement in the longitudinal direction of the pin by the above-mentioned unevenness, and the position of the ■-shaped block is regulated in the longitudinal direction of the pin by the pulley groove. The position of the ■-shaped block in the straight portion of the belt is also restricted in the longitudinal direction of the pin. Therefore, the V-shaped block on the straight line portion of the heddle remains aligned with the pulley groove, and when it gets caught up in the pulley groove, it does not collide with the side surface of the pulley, thereby preventing damage or abnormal wear to the V-shaped block. At the same time, it is possible to reduce noise.

(Example) Hereinafter, the present invention will be described in detail based on illustrated embodiments.

FIG. 1 shows one embodiment of the present invention, in which 1 indicates a large number of pins. Adjacent pins 1 are connected to each other by a link put 2 to form a link connection body 3, and a bottle mount V-shaped block 4 is arranged in the longitudinal direction of this link connection body 3.
will be established. Each pin mount) V-shaped block 4 is shown in Figure 1 (C
), the link connecting body 3 is formed in a shape that surrounds it in the lateral direction, but it is constituted by block portions 4a and 4b divided by the bisecting plane of the pulley groove 8 in the groove width direction. The block parts 4a and 4b are joined together by welding 5 after the tip of the pin 1 is press-fitted into the respective blind holes 4c and 4d, thereby rigidly connecting each V-shaped block 4 to the pin 1.

Further, as shown in FIGS. 1A and 1B, each V-shaped block 4 is provided with a concave portion 6 and a convex portion 7 extending in the longitudinal direction of the link connecting body 3 on both sides of the pulley axial center, respectively. The mutual fitting of the concave and convex portions 6.7 of adjacent ■-shaped blocks 4 prevents the pin 1 from shifting relative to each other in the longitudinal direction.

In practical use, V-shaped block 4 is used as shown in Figure 1 (C1).
Pulley V? Wrap it around R8, and connect both sides 8a and ■
The frictional engagement of the shaped block 4 with both sides of the boo in the axial direction enables power to be transferred between the transmission belt and the groove pulley.

During practical use, the bending stress that acts on the pin l between the V-shaped block 4 and the link connection body 3 is due to the bending stress of the bottle l itself, since the ■-shaped block 4 and the pin 1 are rigidly connected as described above. In addition, it is supported by the deformation strength of the V-shaped block 4. Therefore, the bending strength of the pin l is correspondingly small (and its diameter can be made small, allowing the transmission belt to be made thinner).

In addition, the V-shaped block 4 prevents relative lateral displacement of the pin 1 in the longitudinal direction by the uneven portions 6.7, and the position of the V-shaped block 4 is regulated in the longitudinal direction of the pin 1 by the pulley groove 8. , the position of the ■-shaped block 4 on the belt straight portion between the pulleys is also restricted in the longitudinal direction of the pin 1. Therefore, the ■-shaped block 4 on the belt straight portion is kept aligned with the pulley ■ groove 8, and this pulley V7f
When rolled into the i8, there is no collision with the side surface 8a of the block 4, thereby preventing damage and abnormal wear of the ■-shaped block 4, and reducing noise.

FIG. 2 shows an example in which the idea of the present invention is applied to a transmission belt of a type in which a link mount ■-shaped block 9 is present between pin degrees 7 and ■-shaped blocks 4, and each link mount V-shaped block 9 is attached to the belt. It has the same shape and dimensions as the bottle mount ■-shaped block 4 except for the thickness in the running direction, and is provided on the link connecting body 3.

In this example, the relative lateral deviation in the pin longitudinal direction of the ■-shaped blocks 4 and 9 is determined by the two belt running direction through holes (recesses) 10 provided in each bin mount V-shaped block 4 and the link mount ■-shaped block 9. This is prevented by fitting with the two protrusions 11 provided in the belt running direction. In this case, in addition to achieving the same objectives as in the previous embodiment, the concave portion 10 of the bottle mount ■-shaped block 4 can be easily formed by drilling, and the convex portion 11 of the link mount V-shaped block 9 can be easily formed.
can be easily formed by punching, without reducing the workability of each v-shaped block 4.9.

(Effects of the Invention) As described above, in the power transmission belt of the present invention, since the V-shaped block 4 attached to the pin 1 is rigidly connected to the pin 1, the bending stress applied to the pin 1 can be supported by the deformation strength of the ■-shaped block 4. Therefore, the diameter of the pin 1 can be made smaller, the thickness of the bottle mount V-shaped block 4 in the belt longitudinal direction can be made thinner, and the number of V-shaped blocks incorporated into the transmission belt can be increased to reduce noise. can. Also, all V
The shaped blocks 4 and 9 have unevenness 6 and 7 (10 and 1
1), the ■-shaped block 4 (9) on the belt straight portion between the pulleys can also be aligned with the pulley V-groove 8, and when the ■-shaped block is wound into the pulley V-groove, its side surface 8a As a result, damage to the ■-shaped block 4 (9), abnormal friction, and generation of noise can be prevented.

[Brief explanation of drawings]

FIG. 1 shows an embodiment of the power transmission belt of the present invention, and FIG.
1 is a partially cutaway plan view of the same, bl is a partially cutaway side view of the same, FIG.
(b), (cl is FIG. 1 showing other examples of the present invention, respectively) (
a), (bl, (A partially cutaway plan view, partially cutaway side view, and longitudinal sectional front view similar to C1. ■... Pin 2... Link plate 3.
...Link connection body 4...Bin mount ■-shaped blocks 4c, 4d...Blind hole for press-fitting bottle 6...Concave portion 7...Convex portion 8...Boo I
J V groove 9... Link mount ■-shaped block 10... Through hole (concave part) 11... Convex part, etc.) Flash

Claims (1)

[Scope of Claims] 1. A link connecting body formed by connecting a large number of adjacent pins to each other by link plates, and V-shaped blocks successively drivingly connected to the link connecting body in the longitudinal direction thereof,
In the power transmission belt in which at least some of these V-shaped blocks are attached to the pins to perform the driving connection, at least some of the V-shaped blocks are rigidly coupled to the pins, and all V-shaped blocks are connected to the adjacent ones. A power transmission belt characterized by having concavities and convexities that prevent mating pins from shifting relative to each other in the longitudinal direction.