JPH0530590U - High load transmission belt - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention provides a high durability belt having improved durability by providing sufficient lubricity to the surface defining the slot portion and preventing wear of the surface in contact with the endless band. Provide a load transmission belt. [Structure] An endless band 30 including a plurality of block bodies 20
In the high-load transmission belt suspended on the pillar 20, the block body 20 includes a pillar 23, a pair of locking members 33 including projections 31 and grooves 32 on the front surface and the back surface, a through hole 35 provided in the head 24, And a linear groove portion 47 provided on at least one surface defining the slot portion 25.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 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 transmission devices.

[0002]

[Prior 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 a detailed document.

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 the driving and driven pulleys, the belt is loosened. The block bodies are gathered together, 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, the conventional belt using the push transmission system does not have a relationship in which a plurality of block bodies are joined to each other, and each of them is individually mounted slidably on the band. When they were regularly introduced into the pulley, it was necessary to have a means to control and align the position of each block body.

A belt satisfying this requirement is a block body in which protrusions provided on the surface of each block body are adjacent to each other, as disclosed in Japanese Patent Publication No. 57-58543 or Japanese Patent Publication No. 5-100434. It was self-aligned by being housed in the guide groove provided on the back side of the.

[0006]

[Problems to be solved by the device]

 However, since the block body used in such a belt slides on the endless band, the surface that defines the slot portion that abuts against this band, that is, the shoulder surface, the side surface of the pillar, or the bottom surface of the head is easily worn. I was in a state. When these surfaces are worn, the clearance between the endless band and the slot is changed and self-alignment is performed, so that there is a problem in that the protrusion and the groove are not fitted properly. In this case, not only the blocks collide with each other and the protrusions are damaged, but also the life of the endless band is shortened.

The present invention solves the above problems by ensuring sufficient lubricity of the surfaces defining the slot portion and preventing wear of these surfaces in contact with the endless band. It is an object of the present invention to provide a high load transmission belt that significantly improves the durability of the.

[0008]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention is characterized in that a head is formed in 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 have gaps. Side by side or in close contact with each other, hang an endless band through its slot, and set a pair of locking members with protrusions and grooves at the same position on the front and back surfaces of the block body. In the high load transmission belt provided on at least the pillar, at least one through hole is provided in the head of the block body, and the linear groove portion is provided on at least one surface defining the slot portion.

[0009]

[Action]

 In the high load transmission belt of the present invention, by providing a linear groove on any one of the shoulder face, the side face of the pillar, and the bottom face of the head that define the slot portion, lubricating oil can be provided in these groove portions. These wear and heat generation in contact with the accumulated endless band are extremely small. For this reason, the deviation of the clearance between the endless band and the slot portion is reduced, and the inconvenience of fitting the projection portion and the groove portion is eliminated, and the projection portion or the groove portion is damaged due to the collision between the block bodies, and particularly, the high surface pressure In this state, the wear of the sliding surface caused by the block body sliding on the endless band can be prevented, and the life of the block body can be remarkably improved.

Further, the lubricating oil supplied from below the block body near the driven pulley is sufficiently accumulated in the through hole. The lubricating oil accumulated here is discharged to the outside by the centrifugal force when the belt is wound around the pulley, and this always flows to the head, which is the high-pressure surface portion, thereby improving the wear resistance of the block body. Further, the wear of the contact surface between the endless band and the block body is greatly reduced.

[0011]

【Example】

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

The 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 30 may be pretensioned.

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 in the substantially central portion, a chevron head 24, and an endless band 30. The main body 22 has a taper surface 26 downward from the tilt start line 40 on its front surface, and the block body rotating on the pulley moves in the traveling direction according to its curvature. It is possible to incline. The pitch line P serves as a line when the block body 20 rotates on the pulley, and serves as 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 a center line of the pillar 23 intersects with a neutral line m of the endless band 30, and a groove 32 is arranged on the back surface at the same position. ing. The combination of the protrusion 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-described positions cause the block body to invade the pulley and incline, and are further displaced to the minimum pulley diameter so that the block body main body 22 is This engagement relationship is maintained even if the tapered 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, the cross-sectional shape of the protrusion 31 and the groove 32 is made to be an ellipse or a rectangle elongated in the width direction of the block body instead of a perfect circle. You may.

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

Further, 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 formed between the through hole 35 and the R-shaped upper cutout portion 27. An oil groove 37 is arranged between the hole 35 and the head top portion 36. The lubricant passes from the through hole 35 through the oil groove 37 provided in the head top portion 36, so that the surrounding area is also lubricated and flows out to the outside of the block body so that the head, which is a high surface pressure portion of the block body, is evenly distributed. Lubricate to.

In this embodiment, the through hole 35 provided in the head 24 has a diameter of 2 to 4 mm, and the oil groove 37 has a width of 0.4 to 1.0 mm and a depth of 0.2 to 0.8 mm. Is optimum from the viewpoint of lubrication performance and block strength, and it becomes possible to retain the lubricating oil in the through hole 35 and supply it to the normal oil groove 37. The path of the oil groove 37 may be lengthened in order to lubricate the head 24 in a relatively wide range.

In the present invention, as shown in FIG. 4, the shoulder surface 44 defining the slot 25, the pillar side surface 43, and the head bottom surface 46 intersect the longitudinal direction of the endless band 30. A plurality of linear groove portions 47 are provided in the direction. These grooves 47 serve as a portion for storing the lubricating oil, and the lubricating oil accumulated here improves the lubricity with the endless band 30.

In the block body 20 shown in FIG. 5, a plurality of linear groove portions 47 extending in the same direction as the longitudinal direction of the endless band 30 are provided on the surface defining the slot portion 25. In order to allow the lubricating oil to remain, the direction of the linear groove portion 47 is preferably a direction intersecting the longitudinal direction of the endless band 30. If they are provided in substantially the same direction as the longitudinal direction of the endless band 30, the block body 20 may be moved and discharged easily.

In the present invention, the linear groove portion 47 may be any one of the surfaces that define the slot portion 25, but it is most preferable that the linear groove portion 47 is provided on three surfaces.

[0022]

[Effect of the device]

 As described above, in the present invention, by providing the linear grooves on any of the shoulder surface, which defines the slot portion, the side surface of the pillar, and the bottom surface of the head, the lubricating oil is collected in these grooves and the endless band is formed. Wear and heat generation on the surface in contact with will be extremely small. Therefore, the deviation of the clearance between the endless band and the slot is reduced, and the inconvenience of fitting the protrusion and the groove is eliminated, and the block body slides on the endless band particularly under a high surface pressure condition. The wear of the sliding surface caused by the above is prevented, and the life of the block body is significantly improved.

Further, the lubricating oil accumulated in the through hole is discharged to the outside by the centrifugal force when the belt is wound around the pulley, and this always flows to the head which is the high pressure surface portion, so that the high surface pressure portion of the block body is By increasing the lubricity between the endless band and the head and block body, which has a significant effect of reducing the wear of the block body.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a high load transmission belt according to 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 perspective view of a block body used for the high load transmission belt shown in FIG.

FIG. 5 is a perspective view of a block body used in another high load transmission belt of the present invention.

[Explanation of symbols]

 10 High load transmission belt 20 Block body 22 Main body 23 Pillar 24 Head 25 Slot portion 31 Projection portion 32 Groove portion 33 Locking member 35 Through hole 37 Oil groove 43 Pillar side surface 44 Shoulder surface 46 Head bottom surface 47 Linear groove portion

Claims (1)

[Scope of utility model registration request] 1. A head is formed on a main body of a block body through a pillar, and a plurality of block bodies having 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 a high-load transmission belt in which an endless band is hooked through its slot portion, and a pair of locking members having a protrusion and a groove at the same position on the front surface and the back surface of the block body are provided on at least the pillar. A belt for high load transmission, wherein the head of the block body is provided with at least one through hole and a linear groove portion on at least one surface defining a slot portion.