JPH04175539A - High load transmission belt - Google Patents

Abstract

PURPOSE:To reduce wear of each block and also generation of noise without occurrence of failure in re-fitting of the projection in the groove by providing a pillar with a set of detaining members in which a projection and a groove are arranged in one identical place on the front and rear surfaces, and boring a through hole in the head. CONSTITUTION:A pillar 23 is at least provided with a set of detaining members 33 consisting of a projection 31 and a groove 32 on the front and rear sides of the pillar 23, which should enable self-alignment of blocks 20 with one another. Even in case any block 20 intruding to a pulley causes separation from other blocks behind and inclination, the detention of the projection 31 situated at the pillar 23 near the inclination start line with the groove 32 is maintained always, and there is no inconvenience of out of fitting likely to be generated at the time of separating from the pulley. The head is provided with at least one through hole 35, where lubricant is accumulated. This lubricant lubricates the head face of each block, so that wear of its contacting surface is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a high-load power transmission belt, particularly to a high-load power transmission belt used in vehicles such as automobiles and various mechanical transmission devices.

[Prior 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 block bodies are attached to an endless multilayer steel pad in contact with each other, and these block bodies can be slid, for example, as disclosed 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 blocks are not fixed to the pad, but are arranged so that they can slide on the pad, and when the block body is attached to both the driving and driven pulleys, the block body is on the slack side of the belt. The blocks gathered together and placed on the driving booth push the blocks gathered on the slack side of the belt to turn the driven booth.

However, in conventional belts that use a push-transmission method, multiple block bodies are not connected to each other, but are individually attached so that they can slide on pads, so each block body is regularly rotated. In order to introduce the block into the system, it was necessary to have a means to regulate and align the position of each block. A belt that satisfies this requirement is disclosed in Japanese Patent Publication No. 57-58543 or Japanese Patent Publication No. 55-100443, in which protrusions provided on the surface of each block body are provided on the back surfaces of adjacent block bodies. Self-alignment was achieved by being accommodated in the guide groove.

[Problems to be Solved by the Invention] However, when the block body used in such a belt rotates on the boot, it inclines in a direction in which it separates from the rear block body according to 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 boot, the protrusion may come off the guide groove due to a slight inclination of the block body. When the block rotates on the boot in this condition, it separates from the boot and overlaps the block in front, but at this time, the protrusion may not be accommodated in the guide groove, and there is a risk that the block will not be aligned. there were.

Furthermore, as shown in FIG. 1, the belt 1 is supplied with lubricating oil from the inner circumferential direction of the belt by an oil supply nozzle 4 near the drive pulley 2 on the loose side of the block body. In this lubrication system, the belt 1 is connected to the drive pulley 2
While the lubricating oil enters and rotates, centrifugal force causes the lubricating oil to scatter toward the outer circumference of the boob. In such a lubrication state, in the push-transmission section where the drive pulley 2 is separated and the driven pulley 3 is reached, the block bodies are in close contact with each other, especially at the pillars and heads located above the inclination start line, resulting in high surface pressure. Because it slides between the contact surfaces with slight vibrations while receiving
This had the disadvantage that the block body was easily abraded.

The main method to prevent the above wear 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 increases centrifugal tension, especially during high-speed operation. As a result, the load capacity of the entire belt is reduced,
Favorable effects cannot be obtained.

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 increasing the extra 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 block bodies without causing damage.

[Means for solving problem a] In order to achieve the above object, the present invention is characterized in that a head is formed on the block body via a pillar,
A high-load power transmission belt in which a plurality of block bodies each having a slot portion between the main body and the head are arranged in parallel with a gap or in close contact with each other, and an endless pad is suspended through the slot portion. At least the pillar is provided with a set of engagement members consisting of a protrusion and a groove on the front and back surfaces of the pillar as the block body, and at least one through hole is provided in the head.

Then, an oil groove is provided for introducing the lubricant into the through hole and discharging the lubricant from the through hole.

[Function] In the high-load power transmission belt of the present invention, since at least the pillar is provided with a set of locking members consisting of protrusions and grooves on the front and back surfaces of the pillar, self-alignment of the block bodies is possible. Even if the block body enters the boob 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 boob.

Further, the head has at least one through hole, and this through hole becomes a place where lubricating oil is accumulated, thereby reducing wear on the contact surface of the block body in order to lubricate the head surface of the block body. Moreover, if an oil groove is provided between the through hole and the lower notch at the upper corner of the pillar, the lubricating oil supplied from below the block body on the loose side of the block body will be transferred to the endless pad and the upper and lower corners of the pillar. Oil is accumulated in the area surrounded by the upper and lower notches of the section to form a reservoir, and passes through an oil groove communicating from the lower notch to the through hole, and is accumulated in the through hole while lubricating the head. Further, when the oil passes through the oil groove above the head from the through hole, it flows out of the block body while evenly lubricating the surrounding area. This provides effective lubrication and significantly improves the wear resistance of the block.

[Examples] Hereinafter, further embodiments of the present invention will be 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 pad 30, for example, a multilayer steel pad. Of course, the block bodies 20 may be arranged in close contact with each other, and furthermore, the endless pad 30 may be pretensioned.

Each block body 20 used here includes: (1) a main body 22 having an inclined end surface 21 that comes into contact with the pulley wall surface, a pillar 23 located at the center of the pillar, a chevron-shaped head 24, and a pair of endless pads 30 on which are hung; A slot portion 25,
Further, the main body 22 has a tapered surface 26 on the front thereof downward from the inclination start line 1, which allows the block body rotating on the boob to incline in the traveling direction according to its curvature.

Incidentally, the pitch line P is a line along which the block body 20 rotates on the pulley, and becomes an inclination start line l where the thickness of the body starts to decrease.

Furthermore, four R-shaped upper and lower notches 27 and 28 are provided at both upper and lower corners of the pillar 23, forming oil reservoirs. In particular, the lower corner of the lower notch 28 is located approximately at the same position as the inclination start line 1, and has a guide groove 29 at that position that facilitates the introduction of lubricating oil.

The pillar 28 of the block body 20 is provided with a protrusion 81.31 at a position equidistant from its center line C, and a groove 32.32 opening toward the slot 25 is provided on the back surface of the same position. It is located. A protrusion 31 and a groove 32 provided at the same position on the front and back surfaces of the pillar 23
The combination becomes the locking members 33, and the locking members 33 are located at least on both sides of the pillar 23 and are separated by a predetermined interval.
prevents the block body 20 from swinging around the belt longitudinal axis. As shown in FIG. 4, the protrusion 31 and the groove 32 arranged at the above-mentioned positions are arranged so that the block body enters the boob and tilts, and is further displaced to the minimum diameter of the boob so that the block body main body 2
Even if the two tapered surfaces 26 come into contact with each other, this engagement relationship is maintained.

Furthermore, a through hole 3 is provided approximately at the center of the block head 24.
5 is provided, and an oil groove 3 is provided between the through hole 35 and the R-shaped lower notch 27 and between the through hole 35 and the head top 86.
7 is placed. The lubricating oil supplied from below the block body on the loose side of the block body is stored in the space surrounded by the endless pad 30 and the upper and lower notches 27 and 28 at both corners of the pillar, forming an oil reservoir. This portion lubricates the locking member 38 consisting of a protrusion and a groove, and the lubricating oil is accumulated in the through hole 35 while passing through an oil groove 37 opened in the vicinity due to centrifugal force and lubricating the head portion. Furthermore,
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 85 provided in the head 24 has a diameter of 2 to 3 mm, and the oil groove 37 has a width of 0.4 to 0.8 mm.
The depth is 0.2 to 0.4 mm, and this level is optimal in terms of lubrication performance and the strength of the block body, and also makes it possible to hold lubricating oil in the through hole 35 and constantly supply it to the 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.

Furthermore, in the present invention, as shown in FIG.
It is located on 6. This allows lubricating oil to be transferred to the oil groove 39 above.
This is to improve the lubricity within the groove 32 by actively moving it from the lower notch 28 to the groove 32, and allows the protrusion 81 and the groove 32 to fit smoothly. Of course, in the present invention, the oil grooves 37 and 39 may be provided not only on one side of the block body 10 but also on both sides.

Furthermore, the block body 2 in the embodiment shown in FIGS.
0 pillar 23 has its center line C and an endless pad 30
A protrusion 31 is provided at a position where the neutral line m intersects,
A groove portion 32 is arranged on the back surface at the same position. Projections 3 provided at the same position on the front and back surfaces of the pillar 23
1 and the groove 82 serve as a locking member 33, which prevents the block body 20 from being disarranged in the vertical and horizontal directions. As shown in FIG. 8, the protrusion 31 and groove 32 arranged at the above-mentioned positions cause the block body to enter the boob and incline, and further displace to the minimum diameter of the boob so that the block body 22 tapers. Even if the surfaces 26 come into contact with each other, this engagement 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 elongated in the width direction of the block body instead of being perfectly circular, as shown in FIG. It may be oval or rectangular.

Furthermore, 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 lower notch 27, the through hole 35 and the head An oil groove 87 is arranged between the top portion 86 and between the through hole 35 and the protrusion 31 . The lubricating oil absorbed from below the block body on the loose side of the block body is stored in the space surrounded by the endless pad 30 and the lower notch 28 at both corners of the pillar to form an oil reservoir, and from this part. It moves to the lower notch 28 via between the side wall 40 of the pillar and the end surface 41 of the endless pad, and passes through the oil groove 37 opened in the vicinity by centrifugal force, lubricating the head part and making the through hole. It is accumulated in 35. Furthermore, the lubricating oil is provided through the through hole 85.
By passing through the oil groove 37 provided closer to the head top 36, the oil flows out to the outside of the block body while also lubricating the surrounding area, thereby effectively exerting its lubrication function.

In addition, in order to lubricate the fitting portion between the protrusion 31 and the groove 82 and reduce abnormal noise during fitting, the other oil groove 37a line is located on the center MC of the block body, and the inclination start line l is It is provided from the lower side to the protrusion 81 and from the protrusion 31 to the through hole 35. This oil groove 37a line may be provided on the back surface of the block body to accumulate lubricating oil in the groove portion 32.

[Effect] As described above, in the present invention, by providing at least the pillar with a set of locking members consisting of a protrusion and a groove on the front and back surfaces of the pillar, self-alignment of the block bodies is made possible. The locking member placed at this position will always maintain the fit even if the block body enters the boob and separates from the rear block body and tilts, so that the protrusion and groove will not be reattached. No mating errors occur.

Furthermore, the head has a through hole that accumulates lubricating oil, and by providing an oil groove that supplies lubricating oil to this through hole and an oil groove that guides lubricating oil from this through hole to the top of the head, the head surface can be improved. It is now possible to exhibit a wide range of lubrication functions, reducing wear on the block body, and by supplying lubricating oil to the protrusions or grooves, the fitting between the protrusions and grooves becomes smoother, reducing noise. It also has the great effect of reducing the occurrence.

[Brief explanation of the drawing]

Figure 1 is a diagram showing a general push transmission belt drive device;
Fig. 2 is a longitudinal sectional view of a high-load power transmission belt according to the present invention, Fig. 3 is a view of Fig. 2 seen from the back side, Fig. 4 is a sectional view taken along line A-A in Fig. 2, and Fig. 5 is a longitudinal sectional view of a high-load power transmission belt according to the present invention. A modified embodiment corresponding to FIG.
FIG. 6 is a longitudinal sectional view of another high-load power transmission belt of the present invention;
Figure 7 is a view of Figure 6 from the back side, Figure 8 is B of Figure 6.
-B sectional view and FIG. 9 are longitudinal sectional views of still another high-load transmission belt. 10... High load transmission belt 20... Block body 22... Main body 23... Pillar 24... Head 27.28... Upper and lower notches 31... Projections 32... Groove 33... Locking member 35... Through hole 37.39... Oil groove Patent applicant Mitsuboshi Belting Co., Ltd. 1 day

Claims (1)

[Claims] 1. A head is formed on the main body of the block body through a pillar, and a plurality of block bodies each having a slot portion between the main body and the head are arranged with a gap or in close contact with each other. In the high-load power transmission belt in which the endless pads are suspended through the slots of the high-load power transmission belts, the locking members are arranged in parallel with each other and have protrusions and grooves arranged at the same positions on the front and back surfaces of the pillars as the block bodies. A belt for high-load power transmission, characterized in that at least one pillar is provided with at least one through hole, and the head is provided with at least one through hole. 2. The high-load power transmission belt according to claim 1, wherein at least one surface of the head is provided with an oil groove for introducing lubricating oil into the through hole and an oil groove for discharging lubricating oil from the through hole. 3. The height according to claim 1, wherein at least one of the heads is provided with an oil groove that communicates between the upper notch provided at the upper corner of the pillar and the through hole, and an oil groove that communicates from the through hole to the top of the head. Load transmission belt. 4. The high-load transmission belt according to claim 1, 2 or 3, wherein an oil groove is provided between the lower notch provided at the lower corner of the pillar and the bottom surface of the block main body.