JPH0534340U - High load transmission belt - Google Patents

Abstract

(57) [Abstract] [Purpose] The center of gravity of the block body is placed in the main body to stabilize it, and the weight of the block body is reduced to extend the life of the belt without giving unnecessary tension to the endless band. [Structure] A head 8 is formed on a main body 6 of a block body 2 via a pillar 7, and a plurality of block bodies 2 provided with a slot portion 9 between the main body 6 and the head 8 are arranged in parallel to form a slot. A belt for high load transmission in which an endless band 3 is hung on a portion 9, and a tapered surface 20 having a thickness gradually decreasing downward is provided on at least one surface of the block body 2 and this surface is provided. At least one weight reducing hole 25 is formed in an area 24 defined by the inclined start line 21 which is the starting position of 20, the left and right pulley contact surfaces 5 and the linear bottom surface 23, and the head also has through holes. 12 is provided, and the center of gravity position 26 of the block body is arranged below the inclination start line 21.

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 endless band but is slidably arranged on the endless band, and when it is applied to both the driving and driven pulleys. The block bodies gather on the loose side of the belt, and the block bodies gathered on the loose side of the belt are pushed from the block bodies on the drive pulley to rotate the driven pulley.

The block body has a shape in which a trapezoidal main body having an end surface that comes into contact with a pulley and a triangular head are connected via a pillar, and slot portions are provided on the left and right sides of the pillar to which endless bands are installed. It has become. The main body has a tapered surface on the front surface, the thickness of which gradually decreases downward, and an inclined start line that is the starting position of the tapered surface is located slightly below the shoulder surface. Generally, the tapered surface enables the block body rotating on the pulley to be inclined in the traveling direction according to the curvature.

[0005]

[Problems to be solved by the device]

 However, when the block body slides between the drive pulley and the driven pulley at a certain relative speed with the endless band, the conventional block body has its center of gravity as disclosed in, for example, JP-A-2-225840. Since it is located above the slope start line, it is unstable and tends to tilt back and forth with respect to the direction of travel. When the block body tilted back and forth, the endless band was rubbed against the edge of the slot, and the innermost side surface or the outermost side surface of the endless band was easily damaged. In addition, the pressure component force generated by the power transmission of the block body is applied in the thickness direction of the endless band, and the block body slides while pressing the endless band, which stretches the endless band and extends its life. Shortened.

Further, even when the belt is operated at a high speed, the endless band is stretched by receiving tension by the centrifugal force of the block body and shortening its life. The present invention solves such a problem by placing the center of gravity of the block body inside the main body for stability and reducing the weight of the block body without giving unnecessary tension to the endless band. The purpose is to extend the life.

[0007]

[Means for Solving the Problems]

 A feature of the present invention is that 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 have a gap or are in close contact with each other. In a high-load transmission belt in which endless bands are hung through the slots of the block body, the taper surface of which the thickness gradually decreases downward on at least one surface of the block body Is provided, and at least one weight reduction hole is formed in the area defined by the inclined start line that is the start position of the tapered surface, the left and right pulley contact surfaces, and the linear bottom surface. It is provided and the center of gravity of the block body is located below the tilt start line. In addition, the area of the main body region in the block body may be 3 to 6 times larger than that of the head.

[0008]

[Action]

 In the high load transmission belt of the present invention, the area defined by the inclined start line, which is the starting position of the taper surface of the block body, the left and right pulley contact surfaces, and the linear bottom surface, has a relatively large area. By setting at least one weight reduction hole in this area and a through hole in the head, the center of gravity of the block body can be placed below the inclination start line, so that the block body stands upright. Then, it slides smoothly on the endless band in a stable state, and the endless band is neither rubbed nor pressed by the block body. Moreover, due to the weight reduction of the block body, the endless band is less likely to be subjected to centrifugal tension when the belt rotates at high speed. These will prolong the life of the endless band. Further, when the weight reducing holes are provided, the bottom surface of the block body is bridged in a linear shape, and the block body has a structure that can sufficiently withstand the compressive force due to the thrust of the pulley.

[0009]

【Example】

 Embodiments of the present invention will be described below with reference to the accompanying drawings. The high load transmission belt 1 shown in FIG. 1 is configured by arranging a plurality of block bodies 2 slidably on an endless band 3, for example, a multi-layer steel band. Of course, the block bodies 2 may be arranged in close contact with each other to apply pretension to the endless band 3.

As shown in FIG. 1, each block body 2 used here has a main body 6 having a pulley abutment surface 5 that engages with a V pulley wall surface 4, and a pillar 7 located substantially in the center. A head 8 having an arch-shaped outer frame, and a pair of slot portions 9 on which the endless band 3 is hung. The slot 9 has a shoulder surface 10 for carrying the endless band 3.

Furthermore, a through hole 12 having a circular shape, an elliptical shape, a rectangular shape, a square shape, or the like is provided in a substantially central portion of the block body head 8, and a penetrating hole is provided between the through hole 12 and the R-shaped upper notch portion 13. An oil groove 16 is arranged between the hole 12 and the head top 14. The lubricating oil supplied from below the block in the vicinity of the driven pulley is stored in the space surrounded by the endless band 3 and the lower cutouts 17 at both corners of the pillar to form an oil sump, and from this portion, the oil sump is formed. It moves to the upper notch 13 via the side wall 18 of the rail and the end face 19 of the endless band, and passes through the oil groove 16 opened by the centrifugal force to lubricate the head 8 while penetrating it. Accumulated in the hole 12. By passing through the oil groove 16 provided in the head top portion 14 from the through hole 12 and flowing out to the outside of the block body 2 while also lubricating this periphery, the lubricating function is effectively exhibited.

In this embodiment, the through hole 12 provided in the head 8 has a diameter of 2 to 3 mm, and the oil groove 16 has a width of 0.4 to 0.8 mm and a depth of 0.2 to 0.4 mm. Is optimal in terms of lubrication performance and strength of the block body, and it becomes possible to retain the lubricating oil in the through hole 12 and supply it to the normal oil groove 16. The path of the oil groove 16 may be lengthened in order to lubricate the head 8 in a relatively wide range.

In addition, the pillar 7 of the block body 2 is provided with the projection 15 and the groove 22 on the back surface at the same position. With the block body 2 having the protrusions 15 and the groove portions 22, even if the block body enters the pulley and inclines and is displaced to the minimum pulley diameter, the coupling relationship between them is always maintained. Even when the body 2 is separated from the pulley, this coupling state does not change. The positions of the protrusion 15 and the groove 22 are not limited to the pillar 7.

The front surface of the main body 6 has a tapered surface 20 whose thickness gradually decreases downward, and an inclined start line 21 at the start position of the tapered surface is located below the shoulder surface 10 of the slot 9. positioned. Generally, the tapered surface 20 allows a block body rotating on the pulley to incline in the traveling direction according to the curvature thereof, and the pitch line of the belt serves as a line when the block body 2 rotates on the pulley. It becomes the slope start line 21 where the thickness starts to decrease.

Then, the main body region 24 defined by the tilt start line 21, the left and right pulley contact surfaces 5, 5 and the linear bottom surface 23 is set to have a relatively large area. The region 24 is provided with three circularly cut weight reducing holes 25 to reduce the weight of the block body 2, and the bottom portion 27 of the block body is linearly bridged by this, and the compression force by the pulley thrust is exerted. It has a structure that can sufficiently withstand.

The center of gravity 26 of the block body is formed below the inclination start line 21 by adjusting the size of the body region 24, the weight reducing hole 25, and the through hole 12 provided in the head 8. It That is, the center of gravity 26 is preferably about 0.1 to 2 mm downward (in the direction of the bottom surface 23) from the inclination start line 21. Therefore, in the block body 2 of the present invention, the area of the head 8 is smaller and the body area 24 is larger than that of the conventional one. Specifically, assuming that the area of the region of the head 8 is 1, the area of the main body region 24 is 3 to 6 times larger. If it is outside this range, it is difficult to place the center of gravity position 26 of the block body below the inclination start line 21.

The block body 2 having the center-of-gravity position 26 below the inclination start line 21 is stable with respect to the endless band 3 and is unlikely to be inclined forward and backward with respect to the traveling direction. As a result, the block body 2 presses the block body located in the front in the same direction as the original traveling direction, and the pressing component force applied in the thickness direction of the endless band 3 does not occur, and the endless band smoothly moves. Slide on 3. The endless band 3 can run without being subjected to unnecessary tension, thus extending its life.

FIG. 4 shows another embodiment, in which one unit is provided in the main body region 24 defined by the inclination start line 21, the left and right pulley contact surfaces 5, 5, and the linear bottom surface 23. A weight reduction hole 25 cut out in a shape is provided. Even if such a weight reducing hole 25 is provided, the bottom surface portion 27 is linearly bridged, and the structure is sufficient to withstand the compressive force received from the pulley.

[0019]

[Effect of the device]

 As described above, in the high load transmission belt of the present invention, the area defined by the inclined start line, which is the start position of the tapered surface of the block body, the left and right pulley contact surfaces, and the linear bottom surface is defined. By setting a relatively large area, and providing at least one weight reduction hole in this area and a through hole in the head as well, the center of gravity of the block body can be placed below the start line of inclination. In addition, since the weight of the block body is reduced, the endless band can be pressed and the centrifugal tension during high-speed rotation can be eliminated, so the life of the endless band can be extended and the bottom of the block body can be straightened. And has the effect of sufficiently resisting the compression force due to the pulley thrust.

[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.

FIG. 3 is a side view of a block body used in the high load transmission belt shown in FIG.

FIG. 4 is a longitudinal sectional view of another high load transmission belt according to the present invention.

[Explanation of symbols]

 2 Block body 3 Endless band 6 Main body 7 Pillar 8 Head 10 Shoulder surface 12 Through hole 15 Projection portion 20 Tapered surface 21 Inclination start line 23 Bottom surface 24 Body area 25 Weight reduction hole 26 Center of gravity position

Front page continuation (72) Creator Koji Kunihiro 4-1-2-1, Hamazoe-dori, Nagata-ku, Kobe Mitsuboshi Belt Co., Ltd. (72) Creator Toshiaki Aragane 4-1-2-1, Hamazoe-dori, Nagata-ku, Kobe 3-star Belt Co., Ltd.

Claims (2)

[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 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 the endless band is suspended through the slot portion, a taper surface whose thickness gradually decreases downward is provided on at least one surface of the block body, and At least one weight reducing hole is formed in a region defined by the inclined start line that is the start position, the left and right pulley contact surfaces, and the linear bottom surface, and a through hole is also formed in the head to form the block body. A belt for high load transmission, characterized in that the position of the center of gravity is arranged below the inclination start line. 2. The area of the body region in the block body is
The high load transmission belt according to claim 1, which is 3 to 6 times larger than that of the head.