JPH04219546A - Belt for transmitting high load - Google Patents

Abstract

PURPOSE:To provide a belt for transmitting high load which ensures self- alignment of block bodies and ensure sufficient lubrication property in high surface pressure sections of the block bodies to improve wear resistance of the block bodies. CONSTITUTION:In a belt for transmitting high load in which a plural number of block bodies 20 are arranged on an endless band 30, the block bodies 20 have a pair of engaging members 33 consisting of a projection section 31 and a groove section 32 on their surface and back respectively in a pillar 23 and are provided with a fiber member 42 which becomes an oil holding material in upper and lower knotched sections 27, 28 which are provided at upper and lower corners of a through-hole 35 which is drilled in a head 24 and the pillar 23.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to high-load power transmission belts, and particularly to high-load power transmission belts used in vehicles such as automobiles and various mechanical transmission devices.

0002

2. Description of the Related Art Conventionally, power transmission systems for high-load transmission belts are generally classified into two types: push transmission and tension transmission. Among these, the push-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 has a structure in which the block bodies are not fixed to the band, but are arranged so as to be able to slide on the band. The blocks gather together, and the blocks placed on the driving pulley push the blocks gathered on the slack side of the belt to turn the driven pulley.

[0004] However, in conventional belts using a push-transmission system, a plurality of block bodies are not connected to each other, but are each individually slidably mounted on the band. In order to introduce the blocks into the pulley in an orderly manner, a means for regulating and aligning the positions of the blocks was required.

[0005] A belt that satisfies this is the
As disclosed in Japanese Patent Publication No. 8543 or Japanese Patent Publication No. 55-100443, the protrusions provided on the surface of each block body are self-aligned by being accommodated in guide grooves provided on the back surface of the adjacent block bodies. was doing.

[0006]

However, when the block body used in such a belt rotates on the pulley, it inclines in a direction in which it separates from the rear block body depending on its curvature. At this time, interference between the protrusion provided on the block body and the guide groove is unavoidable, and the protrusion is accommodated in the guide groove with a clearance between the protrusion and the guide groove. Therefore, there was a problem in that adjacent block bodies were loose and difficult to align correctly.

Furthermore, when the block body is wound around the pulley, the protrusion may come off the guide groove due to a slight inclination of the block body. When the block body rotates on the pulley in this condition, it separates from the pulley and overlaps the block body in front, but at this time, the protrusion may not be accommodated in the guide groove, and there is a risk that the block body may not be aligned. .

Furthermore, as shown in FIG. 5, the belt 1
A method is generally adopted in which lubricating oil is supplied near the inlet of the driven pulley 3 from the inner circumferential direction of the belt using an oil supply nozzle 4. In this lubrication system, while the belt 1 rotates the driven pulley 3 and the driving pulley 2, the lubricating oil is scattered toward the outer periphery of the pulleys due to centrifugal force.

In such a lubricated state, while the belt is running, especially in the pushing movement section where the block body reaches the driven pulley 3 by the driving pulley, each block body is moved by the pillars and heads located above the inclination start line. Since the blocks are in close contact with each other and slide between the contact surfaces under high contact pressure, the block body vibrates slightly and slides between the contact surfaces, which has the disadvantage that the block body is prone to wear.

[0010] As a method for preventing the above-mentioned wear, the main method is to increase the area of the contact pressure part and reduce the contact pressure per unit area, but increasing the block area increases the belt weight. This results in an increase in tension, especially during high-speed operation. As a result, the power transmission ability of the belt is reduced, and good effects cannot be obtained.

[0011] The present invention improves these problems by ensuring the self-alignment function of the block body, and in addition, ensuring sufficient lubricity for the high surface pressure portion of the block body, and reducing the excess pressure receiving area. It is an object of the present invention to provide a high-load power transmission belt that significantly improves the durability of the belt by effectively preventing wear of the block body without increasing the wear of the block body.

0012

[Means for Solving the Problems] In order to achieve the above object, the present invention is characterized in that a head is formed on the block main body via a pillar, and a plurality of slots are provided between the main body and the head. In a high-load power transmission belt in which block bodies are arranged in parallel with gaps or in close contact with each other, and an endless band is hung through the slots, the block bodies have protrusions and grooves on their front and back surfaces. A set of engaging members consisting of the following are provided at least on the pillar, and a fiber member serving as an oil retaining material is further attached to at least one through hole provided in the head.

Of course, a fiber member serving as an oil retaining material may be attached to the upper and lower notches provided at the upper and lower corners of the pillar as well as the through hole. Then, an oil groove is provided for introducing the lubricant into the through hole and discharging the lubricant from the through hole.

[0014]

[Operation] In the high-load power transmission belt of the present invention, self-alignment of the block bodies is possible because at least the pillars are provided with a set of locking members consisting of protrusions and grooves on the front and back surfaces of the block body. Even if the block body enters the pulley and separates from the rear block body and tilts, the engagement relationship between the protrusion and groove located on the pillar near the tilt start line is always maintained, so the block There is no inconvenience caused by misfit between the protrusion and the groove that occurs when the body separates from the pulley.

[0015] Furthermore, at least one through hole provided in the head becomes a place where lubricating oil is accumulated, and by installing a fiber member serving as an oil retaining material in this through hole, lubricating oil can be accumulated for a longer period of time. The lubricating oil exuding from the fiber member lubricates the head surface of the block body to reduce wear on the contact surface of the block body.

Furthermore, when the fiber members are attached to the upper and lower notches provided at the upper and lower corners of the pillar, the lubricating oil supplied from below the block body near the driven pulley can be sufficiently accumulated. Then, this lubricating oil passes through the oil groove that communicates from the upper notch to the through hole, lubricates the head and accumulates in the through hole, and when it passes through the oil groove of the head from the through hole, it spreads evenly around the area. It will flow out of the block body while lubricating it. This provides effective lubrication and significantly improves the wear resistance of the block.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be further described with reference to the accompanying drawings.

The high-load transmission belt 10 shown here is constructed by slidably arranging a plurality of block bodies 20 and an endless band 30, for example, a multilayer steel band. Of course, the block bodies 20 may be arranged closely together, and the endless band 30
Pretension may be applied to.

Each block body 20 used here includes a main body 22 having an inclined end surface 21 that contacts the V-pulley wall, a pillar 23 located approximately in the center, and a chevron-shaped head 24.
, and a pair of slot portions 2 on which the endless band 30 is hung.
5, and the main body 22 has an inclination start line 40 on the front thereof.
It has a tapered surface 26 downward from the top, which allows the block body rotating on the pulley to tilt in the direction of movement according to its curvature.

The pitch line P is a line along which the block body 20 rotates on the pulley, and becomes an inclination start line 40 at which the thickness of the body begins to decrease.

The pillar 23 of the block body 20 is provided with a protrusion 31 at a position where its center line intersects with the neutral line m of the endless band 30, and a groove 32 is provided on the back surface at the same position.
is located. The combination of the protrusion 31 and the groove 32 provided at the same position on the front and back surfaces of the pillar 23 serves as a locking member 33, which prevents the block body 20 from being disarranged vertically and horizontally.

As shown in FIG. 3, the protrusion 31 and groove 32 arranged at the above-mentioned positions cause the block body to enter the pulley and be inclined, and then to be further displaced to the minimum pulley diameter, resulting in the taper of the block body body 22. Even if the surfaces 26 come into contact with each other, this engagement relationship is maintained.

In order to prevent the block body 20 from swinging around the belt longitudinal axis, the cross-sectional shapes of the projections 31 and grooves 32 are made in the width direction of the block body instead of being perfectly circular, as shown in FIG. It may be an elongated oval or rectangle.

Furthermore, four R-shaped upper and lower notches 27 and 28 are provided at both upper and lower corners of the pillar 23 to form oil reservoirs. In particular, the lower corner of the lower notch 28 is located approximately at the same position as the inclination start line 40.

Further, a circular, oval, rectangular, square, etc. through hole 35 is provided approximately at the center of the block body head 24, and between the through hole 35 and the R-shaped upper notch 27,
An oil groove 37 is arranged between the through hole 35 and the head top 36 and between the through hole 35 and the projection 31. The lubricating oil absorbed from below the block near the driven pulley is absorbed into the endless band 30 and the lower notches 2 at both corners of the pillar.
The oil is stored in the space surrounded by 8 to form a reservoir, and from this part it moves to the upper notch 28 via between the side wall 43 of the pillar and the end surface 41 of the endless band, and then the centrifugal force The head 2 passes through the oil groove 37 opened in the vicinity thereof.
4 is accumulated in the through hole 35 while lubricating it.

Further, by passing through the oil groove provided in the head top portion 36 through the through hole 35, the oil flows out to the outside of the block body while also lubricating the surrounding area, thereby effectively exerting its lubrication function.

In this embodiment, the through hole 35 provided in the head 24 has a diameter of 2 to 3 mm, and the oil groove 37 has a width of 0.4 mm.
~0.8mm, depth 0.2~0.4mm, and this level is optimal in terms of lubrication performance and strength of the block body.
Further, it becomes possible to hold lubricating oil in the through hole 35 and supply it to the normal oil groove 37. In order to lubricate the head 24 over a relatively wide range, the path of the oil groove 37 may be lengthened.

A fiber member 42 serving as an oil retaining material is attached to the through hole 35 and the upper and lower notches 27 and 28. This improves the adsorption of lubricating oil and allows the adsorbed lubricating oil to ooze out at all times in an appropriate amount. Therefore, the fiber members 42 attached to the upper and lower notches 27 and 28 exude lubricating oil when the block bodies 20 move up and down a small amount and the endless band 30 comes into contact with the upper and lower surfaces of the slot section 25. This improves the lubricity between the endless band 30 and the block body 20.

Furthermore, the lubricating oil seeping out from the fiber member 42 in the through hole 35 passes through the oil groove 37 and uniformly lubricates the head 24, which is the high pressure surface of the block body.

The fiber member 42 is a lump or short fiber of woven fabric, knitted fabric, non-woven fabric, etc. made of natural fibers or synthetic fibers, and these are attached to the through hole 35 and the upper and lower notches 27 and 28 with an adhesive. let In particular, in the case of short fibers, they are flocked onto the adherend by spraying or the like.

[0031]

[Effects of the Invention] As described above, in the present invention, by providing at least the pillar with a set of locking members consisting of protrusions and grooves on the front and back surfaces of the block bodies, self-alignment of the block bodies with each other is possible. Even if the locking member disposed at this position is separated from the block body and tilted, the locking member always maintains its fitting, so that mistakes in refitting the protrusion and the groove do not occur.

Furthermore, since fiber members serving as oil retaining materials are attached to the through holes provided in the head and the upper and lower notches provided at the upper and lower corners of the pillars, lubricating oil can be stored in these fiber members. By constantly exuding an appropriate amount of this, it increases the lubricity between the head, which is a high surface pressure part of the block body, and the endless band, reducing wear on the block body, and also reducing wear on the protrusion or groove. If lubricating oil is supplied to the groove, the fitting between the protrusion and the groove becomes smooth, which has the great effect of reducing the occurrence of abnormal noise.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of a high-load transmission belt of the present invention.

FIG. 2 is a view of FIG. 1 seen from the back.

FIG. 3 is a sectional view taken along line AA in FIG. 1;

FIG. 4 is a vertical cross-sectional view of another high-load transmission belt.

FIG. 5 is a diagram showing a general push transmission belt drive device.

[Explanation of symbols]

10 High load transmission belt 20 Block type 22 Main body 23 Pillar 24 Head 27 Upper notch 28 Lower notch 31 Protrusion 32 Groove 33 Locking member 35 Through hole 37 Oil groove 42 Fiber member

Claims (3)

[Claims] Claim 1: A plurality of block bodies in which a head is formed on the main body of the block body via a pillar, and a slot portion is provided between the main body and the head are arranged in parallel with a gap or in close contact with each other. In the high-load power transmission belt in which an endless band is suspended through the slot portion, a pair of locking members each having a protrusion and a groove arranged at the same position on the front and back surfaces of the block body are attached to at least the pillars. A high-load power transmission belt characterized in that a fiber member serving as an oil retaining material is attached to at least one through hole provided in the head. 2. A high-load power transmission according to claim 1, wherein fiber members serving as oil retaining materials are attached to upper and lower notches provided at the upper and lower corners of the pillar, as well as the through-holes. belt. 3. The high-load power transmission belt according to claim 1, further comprising an oil groove for introducing lubricating oil into the through hole and an oil groove for discharging lubricating oil from the through hole on at least one surface of the head.