JPS6132189Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a V-belt for power transmission, particularly a V-shaped cog belt for high-load transmission with high lateral pressure resistance.

Conventionally, V-shaped cog belts for power transmission have been constructed by laminating and pasting rubberized canvas on the surfaces of upper and lower cushion rubber layers in which rope tension members are embedded in parallel, and providing a group of wave-shaped cogs on the lower surface of the belt, that is, the contact surface with the pulley. However, since the cushion rubber in the cog section is usually flexible, when it is fitted to a pulley and driven, the entire belt bends laterally and falls into the pulley, causing deformation. There are problems such as a decrease in transmission force and early damage.

Therefore, various measures have been considered to date to improve the lateral pressure resistance.
We have not yet come up with a sufficient countermeasure.

In response to the current situation, the present applicant has also worked to solve the above-mentioned problems with cog belts, and has conducted various research for some time. 1981- A real desire to improve lateral pressure properties.
Proposed as No. 68793.

However, after further investigation, it was discovered that when the above-mentioned metal rods, metal pipes, etc. are inserted into the cog part, shearing force is generated on the thin rubber layer between the tensile rope and the reinforcing material during power transmission. It was discovered that tensile stress and compressive stress act, the rubber is torn due to mechanical fatigue, thermal fatigue, oil, etc., and the reinforcing material falls off.Therefore, flat type V-belts were developed as an improved high-load transmission V-belt. A belt with a reinforcing plate at the top and a cog-shaped reinforcing material at the bottom facing each other, and a fastening material such as a bolt passing through the reinforcing plate, flat belt, and reinforcing material and tightening and fixing them together. proposed.

However, even with such belts, it has been found that the improvement in lateral pressure resistance cannot be said to be complete, and that especially wear on the belt contact surfaces at both ends of the cog portion hinders the improvement in lateral pressure resistance.

That is, the present invention provides a V-belt for high-load power transmission, in which a reinforcing plate is placed on the upper part of the flat belt, and a cog-shaped reinforcing material is arranged on the lower part, and these are tightened and fixed together using fastening materials such as bolts. This is a further improvement of the reinforcing material, where the contact area with the V-pulley is coated with ultra-hard metal wire, metal powder, or ceramic by thermal spraying to improve the wear resistance of the contact area with the V-pulley. The purpose is to

Therefore, the feature of the present invention that is suitable for such purpose is that, in the V-belt for high-load transmission, the contact surface with the V-pulley of the exposed end portions of the cog-shaped reinforcing material is thermally sprayed with metal or ceramic. It is at the point where the coating is applied.

Note that the flat belt in the above V-belt is a flat endless belt in which low-elongation, high-strength rope tensile bodies are spirally embedded in parallel in a rubber-like elastic body, and one or more layers are further formed on the surface of the flat belt. It includes both a flat endless belt made of laminated and pasted canvas layers.

Hereinafter, specific embodiments of the V-shaped cog belt of the present invention will be described in detail with reference to the accompanying drawings.

Fig. 1 shows an example of a V-shaped cog belt with cog-shaped reinforcing material according to the present invention. rubber), CR
(chloroprene rubber), NBR (nitrile rubber),
A rubber-like elastic layer of a flat belt made of a single material such as IIR (butyl rubber), Hypalon (chlorosulfonated ethylene), an appropriate blend of these rubbers, or polyurethane rubber, and in the figure, the rubber-like elastic layer 2 One or more layers, usually one to three layers, of nylon canvas, Kepler (trade name) canvas, or bias canvas or wide-angle canvas 3 made of warp and warp yarn are laminated on top of the elastic material layer 2. A rope tensile material 1 of high strength and low elongation, such as polyester, aliphatic polyamide, aromatic polyamide, glass fiber, or wire strands, is buried spirally in parallel in the lower part of the upper part. A stretchable canvas 4 made of the same material as the canvas 3 or woven with woolly-processed crimped nylon warp and normal nylon weft is arranged. A cog-shaped reinforcing material 5 is disposed at the lower part of the flat belt b in a direction perpendicular to the longitudinal direction of the flat belt, while a cog-shaped reinforcing material 5 is disposed at the upper part facing the cog-shaped reinforcing material 5. A reinforcing plate 6 as a reinforcing material is placed and arranged, and the cog-shaped reinforcing material 5, the flat belt b, and the reinforcing plate 6
As shown in the figure, the entire body is tightened and fixed together with fastening members 7 made of bolts, nuts, etc.

In the above structure, the cog-shaped reinforcing material 5 is usually made of metal or resin with high rigidity, or
It has a cog-like structure made of FRP, wood, plywood rods or pipes, and thermosetting resin such as phenolic resin or epoxy resin with canvas layered or spirally inserted. In particular, metal rods are most preferred.

The reinforcing material 5 made of metal rods is usually a highly rigid rod made of aluminum or aluminum alloy, or iron or iron alloy, and its end portion is exposed on the same plane as the side surface of a normal cog to form a side surface.

In addition, it is particularly effective to use a rod made of a self-lubricating porous sintered structure as the reinforcing material 5, and is a preferred embodiment.

This self-lubricating porous structure is generally made of sintered metal or sintered ceramic impregnated with a lubricant such as lubricating oil or wax. Mixed porous sintered metals are the most practical.

The reinforcing material 5 to be provided is a metal trapezoidal bar in the illustrated example, but it may be of various irregular cross-sectional shapes including a circular cross-section, and is not limited to a bar, but may be of various types of pipes or pipes with irregular cross-sections. It is also possible to use .

However, both of these form a kind of cog at the bottom of the flat belt.

Next, on the other hand, the reinforcing plate 6, which is the quasi-reinforcing material on the upper surface of the belt, usually has an arbitrary shape including a rectangular shape, and is made of a metal plate such as aluminum or its alloy, iron or its alloy, or ABS resin, acrylic resin, or nylon. Resin board or FRP (reinforced resin board) selected from resin, polyester resin, polyimide resin, phenolic resin, epoxy resin, etc.
is used.

Furthermore, wood, wood plywood, etc. can also be used.

When tightening and fixing the reinforcing material 5, the bolts 7a are generally tightened from above as shown in FIG.
is passed through the reinforcing plate 6, the flat belt b, and the cog-shaped reinforcing member 5, and is tightened with a nut 7b on the lower surface of the cog-shaped reinforcing member.

However, as shown in FIG. 2, the bolt 7a may be passed through from below and tightened with a nut 7b on the upper surface of the belt, contrary to FIG. 7d may be carved, and a bolt 7c having a threaded end portion may be inserted from above and tightened and fixed.

Furthermore, not only bolts but also rivets 7 as shown in Figure 4.
It is also possible to fix the upper and lower parts of the belt using e, by welding the contact area between the bolt and nut as shown in Figures 1 and 2 above, or by pressing the protruding tip of the bolt to make the locking stronger. It can also be done.

In each of the above cases, it is most stable to use two bolts or rivets on both sides as shown in each example, but it is of course possible to use one bolt or rivet in the middle and tighten it. .

Note that the bolt is generally made of iron or brass.

Furthermore, when tightening with bolts, rivets, or other fastening materials, it is preferable to use spring washers, flat washers, etc., as necessary, since this improves the tightening effect.

The V-shaped cog belt configured as described above is the basic belt configuration in the present invention, but in the present invention, as an additional feature, as shown in FIGS. A surface coating made of ultra-hard metal or ceramic is applied to the exposed portions of both ends, that is, the contact surfaces with the V-shaped pulley.

This coating is a thermally sprayed layer of ultra-hard metal wire, metal powder, and ceramic that further improves the wear resistance of the contact surface.

Thus, in the present invention, the reinforcing material 5 and the reinforcing plate 6
are integrated by the fastening material 7, preventing the reinforcing material 5 from falling off, preventing fatigue of the rubber layer between the tensile member and the reinforcing material 5, maintaining excellent lateral pressure resistance, and reinforcing. The metal or ceramic spray coating on the exposed ends of both sides of the material 5 further improves wear resistance, contributing to high load transmission.

The above describes the case of a flat belt in which a low-elongation, high-strength rope tension body is spirally embedded in a rubber-like elastic body, and canvas layers are laminated and pasted on both the top and bottom surfaces. The same applies to a flat belt having no rope tension member, that is, a flat belt in which a rope tensile member is spirally embedded in a rubber-like elastic body, and the method of fastening with a fastening material such as a bolt is also the same.

Particularly in this case, it is advantageous to use a spring washer, a flat washer, etc. to tighten and fix.

As described above, the V-belt for power transmission of the present invention has a cog portion formed of a cog-shaped reinforcing material, a reinforcing material made of aluminum or an aluminum alloy metal rod, etc., and a reinforcing plate arranged on the upper surface of the belt. The reinforcing material and reinforcing plate are tightened and fixed together, and the cog-shaped reinforcing material eliminates any lateral deformation of the belt when it is fitted with the pulley, and has better resistance to lateral pressure than conventional cog belts. It is possible to increase the transmission force per the same cross-sectional area due to the deformation prevention effect, and by fixing the reinforcing material integrally to the reinforcing plate with bolts etc., it solves the conventional problems. By reducing the shearing force that occurs between the reinforcing material and the tensile rope, most of it is carried by the fastening material that passes through the reinforcing material and reinforcing plate, and by dispersing the shearing force, the shearing of the cog part is reduced. Not only does it have the remarkable effect of eliminating breakage and preventing the reinforcing material from falling off, further improving lateral pressure resistance and greatly improving belt life, but it also reduces the contact between the end face of the reinforcing material and the V pulley. By applying a high-hardness metal or ceramic spray coating to the surface, the wear resistance in the same area has been greatly improved, and the effect of the cog-shaped reinforcement has been greatly enhanced, something that was still considered to be lacking in the past. Completed the deficiencies in lateral pressure resistance improvement measures,
It is even more effective as a high-load transmission belt.

[Brief explanation of the drawing]

Figure 1 shows one of the high-load transmission belts according to the present invention.
The perspective view showing the example and FIGS. 2 to 4 are all sectional views of modified embodiments in which the manner of tightening and fixing is different. a... Belt body, 1... Rope tensile body, b...
...Flat belt, 2...Rubber-like elastic body, 3...Flat belt upper canvas, 4...Flat belt lower canvas, 5
... Reinforcement material, 6 ... Reinforcement plate, 7 ... Fixing material, 7a
...Bolt, 7b...Nut, 7c...Threaded bolt, 7d...Thread groove, 7e...Rivet, 8
...Metal or ceramic spray coating.

Claims (1)

[Claims for Utility Model Registration] 1. A flat belt in which low elongation, high strength rope tension members are spirally embedded in a rubber-like elastic body in parallel, facing in a direction perpendicular to the longitudinal direction of the belt. A cog-shaped reinforcing material is provided at the bottom, and a reinforcing plate is provided at the top, and the flat belt is passed between the upper and lower reinforcing plates and the reinforcing material, and is tightened and fixed with a fastening material such as a bolt. A high-load power transmission belt characterized in that the contact surfaces of the exposed ends of the reinforcing material with the V-pulley are coated with metal or ceramic sprayed. 2. The high-load power transmission belt according to claim 1, wherein the reinforcing material is a metal rod or a metal pipe. 3. The high-load power transmission belt according to claim 2, wherein the reinforcing metal is selected from the group consisting of aluminum or its alloy, iron or its alloy. 4. The high-load transmission belt according to any one of claims 1 to 3 of the utility model registration claim, wherein the reinforcing plate is a metal plate. 5. The high-load power transmission belt according to claim 4, wherein the metal plate is a plate made of a metal selected from the group consisting of aluminum or its alloy, iron or its alloy. 6. The high-load power transmission belt according to any one of claims 1 to 3, wherein the reinforcing plate is a resin plate or a reinforced resin plate. 7. For high-load transmission according to claim 6, wherein the reinforcing plate resin is a resin selected from the group consisting of ABS resin, acrylic resin, nylon resin, polyester resin, polyimide resin, phenol resin, and epoxy resin. belt. 8. The high-load power transmission belt according to any one of claims 1 to 3, wherein the reinforcing plate is made of wood or plywood. 9. The high-load power transmission belt according to any one of claims 1 to 8, wherein the fastening materials are bolts and nuts. 10. The high-load power transmission belt according to any one of claims 1 to 8, wherein the fastening material is a threaded bolt. 11. The high-load power transmission belt according to any one of claims 1 to 8, wherein the fastening material is a rivet.