JPS627417B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a V-belt for power transmission, and particularly to 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 the pulley and driven, the entire belt bends laterally and falls into the pulley, causing deformation. There are problems such as a reduction in the transmission force due to this and early breakage.

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.
It was proposed as No. 68793.

However, after further study, it was discovered that when the above-mentioned metal rods, metal pipes, etc. are inserted into the cog part, shearing and tensile forces are applied to the thin rubber layer between the tensile rope and these reinforcing materials during power transmission. It has been found that there is a problem in which stress and compressive stress move, the rubber is torn due to mechanical fatigue, thermal fatigue, oil, etc., and the reinforcing material falls off.

Moreover, all the metals inserted in the above proposal are metals that do not have a self-lubricating function, and when the metal is exposed on the side of the belt when running in the belt, it is necessary to lubricate it from the outside. If the belt is not properly lubricated, the friction between the reinforcing metal of the belt and the metal pulley will not only cause noise, but also cause wear, heat generation, and seizure. Therefore, lubrication from the outside is required, but oil lubrication is avoided depending on the application, for example, when there are hygiene problems, such as in food-related applications.

It has also been found that in such cases, the above method is completely unusable.

That is, the present invention addresses the above-mentioned actual situation, and aims to prevent the drawbacks of the above-mentioned devices according to the proposal, particularly the former drawback, and to provide a further improved V-belt for high-load transmission. It is something to do.

Therefore, in order to achieve the above object, the present invention intends to utilize a flat belt, and a reinforcing plate is placed on the upper part of the flat belt, and a cog-shaped reinforcing material is placed oppositely on the lower part of the flat belt, so that bolts, etc. can be fastened. Reinforcement plate/
It is characterized by penetrating the flat belt and reinforcing material and tightening and fixing it integrally.

Furthermore, when using a flat belt, the present invention forms a concave groove in the cog-shaped reinforcing material and fits the reinforcing material into the concave groove, thereby eliminating fraying of the tensile body exposed portion on the side surface of the belt. Another important feature is accurate positioning of the reinforcing material and the flat belt.

Another important feature of the present invention is that gaps are provided on both sides of the upper and lower reinforcing plates and reinforcing materials so that the heat generated between the flat belt and those reinforcing plates and reinforcing materials when the belt is driven can be dissipated through the gaps. It is a characteristic.

Here, the flat belt is a flat endless belt in which low-elongation, high-strength rope tension members are spirally embedded in a rubber-like elastic body in parallel, and one to multiple canvas layers are laminated and pasted on the surface of the belt. This includes both flat endless belts.

Of course, it is also important to prevent the above-mentioned lubrication drawbacks, and for this purpose, we have separately proposed the use of a porous sintered structure having self-lubricating properties.

Therefore, it is also contemplated to apply such a configuration to the present invention.

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

1 to 8 are examples of a high-load power transmission belt according to the present invention.

In the figure, a is the V-shaped cog belt body, b is the flat belt body, and 2 is NR (natural rubber), SBR (styrene butadiene rubber), CR (chloroprene rubber), NBR (nitrile rubber), IIR (butyl rubber), Hybaron. A rubber-like elastic layer of a flat belt made of a single material such as (chlorosulfonated ethylene) or a blend of these rubbers or polyurethane rubber, and the elastic layer 2 contains polyester, aliphatic polyamide, aromatic polyamide,
Alternatively, rope tension members 1 having high strength and low elongation, such as glass fiber or wire strands, are buried in parallel in a spiral manner, and if necessary, the rubber-like elastic material layer is further embedded. On top of 2, one or more, usually one to three layers, of nylon canvas, Kevlar (trade name) canvas, bias canvas or wide-angle canvas made of warp and warp yarn are laminated and pasted, and
In the lower part, a stretchable canvas made of the same material as the upper canvas or woven with woolly-processed crimped nylon warp and normal nylon weft is layered.

On the other hand, in the figure, numeral 3 indicates a cog-shaped reinforcing member which is the main part, and is provided in the lower part of the flat belt main body b in a direction perpendicular to the longitudinal direction of the belt, and has a recess into which the flat belt main body b fits into the upper surface. It is formed in a shape with grooves 4 and is made of highly rigid metal or resin or
It is constructed in a cog shape using FRP, wood/plywood rods, or pipes. In particular, metal rods are preferred.

Generally, the groove 4 needs only to have a width and depth sufficient to fit the flat belt, and the width is approximately the same width or slightly larger than the width of the flat belt, and the depth is partially or completely. It may be smaller, the same, or larger than the flat belt thickness depending on the fit.

1, 2, and 8 are cases where the groove depth is larger than the belt thickness, and the others are cases where the groove depth is smaller. In accordance with this, various modifications are made to the structure of the reinforcing plate, which will be described later.

The metal rod reinforcing member 3 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 3, 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 3 to be provided is a trapezoidal bar made of metal in the examples shown above, but it may also be of various irregular cross-sectional shapes including a circular cross-section. It is also possible to use pipes and the like.

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

Next, the reinforcing plate 5, which is a quasi-reinforcing material on the upper surface of the belt with respect to the reinforcing material, is a reinforcing plate that has an important feature together with the reinforcing material 3 in the present invention, and is opposite to the reinforcing material 3. It is placed on the upper surface of the belt, and is fastened together with the aforementioned reinforcing member 3 by a fastening member 7 made of a threaded bolt, a rivet, a bolt and a nut, or the like.

This reinforcing plate 5 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 a resin selected from ABS resin, acrylic resin, nylon resin, polyester resin, polyimide resin, etc. board or FRP
A material similar to the reinforcing material 5, such as (reinforced resin plate), is used.

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

Although the shape of the reinforcing plate 5 is most commonly rectangular as described above, since the reinforcing material 3 has the groove 4, the depth of the groove 4 may cause the groove to form on the lower surface of the reinforcing plate 5. It is also a preferable embodiment to provide a convex step portion 5a that fits into the groove. In addition, as shown in FIGS. 2 and 4, a spring washer or a flat washer 6 may be used together with the reinforcing plate 5, or a spring washer or a flat washer 6 may be used alone instead of the reinforcing plate 5. It's okay. (See Figure 5) In this case, it is effective to stack the flat washers on the bottom and the spring washers on the top.

When tightening and fixing the reinforcing member 3 and the reinforcing plate 5, generally, a threaded bolt 7a is passed through the reinforcing plate 5, the flat belt b, and the cog-shaped reinforcing member 3 from above and tightened. Like bolt 7b,
The bolt 7b passed through the bolt 7b may be tightened using the nut 7c.

However, it is also possible to pass the bolt 7b from below and tighten it with the nut 7c on the upper surface of the belt.

Furthermore, in addition to bolts, rivets can also be used to secure the upper and lower parts of the belt, and the contact area between the bolt and nut can be welded, or the protruding bolt tip can be caulked by pressing to make the locking stronger. You can also do it.

In each of the above cases, it is most stable to use two bolts or rebelts on both sides as shown in each example, but of course it is also possible to use one bolt in the middle and tighten it to secure it. .
(Figures 6 and 7) The bolt is generally made of iron or brass.

Furthermore, when tightening with bolts, rivets, or other fastening materials, the use of spring washers, flat washers, etc. 6 as described above improves the tightening effect, so it is desirable to use them as necessary.

However, in the present invention, the groove 4 of the reinforcing material 3
By creating a gap on both sides of the reinforcing material 5 and reinforcing material 3 depending on the depth of It has the effect of dissipating heat from other parts.

Thus, in the present invention, the reinforcing material 3 and the reinforcing plate 5
are integrated by the fastening material 7, preventing the reinforcing material 3 from falling off and preventing fatigue of the rubber layer between the tensile material and the reinforcing material 3, maintaining excellent lateral pressure resistance and supporting high loads. Contributes to power transmission.

The above describes the case of a flat belt in which a low-elongation, high-strength rope tension member is spirally embedded in a rubber-like elastic body, as shown in the attached examples. The same applies to the case of a belt, and the same applies to the fastening mode using a fastening material such as a bolt.

As described above, the power transmission V-belt of the present invention has a cog portion formed by a cog-shaped reinforcing material, a reinforcing material made of an aluminum or aluminum alloy metal rod, etc., and a reinforcing plate provided on the upper surface of the belt. The reinforcing material and the 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 higher lateral pressure resistance than conventional cog belts. In addition, the deformation prevention effect increases the transmission force per the same cross-sectional area. Furthermore, the reinforcing material is integrally fixed to the reinforcing plate with bolts or the like, which solves the problems that were previously encountered. By reducing the shearing force generated between the reinforcing material and the tensile rope, most of it is carried by the anchoring material that penetrates the reinforcing material and reinforcing plate, and by dispersing the shearing force, shear failure of the cog part can be prevented. It eliminates this problem, prevents the reinforcing material from falling off, and has the remarkable effect of further improving lateral pressure resistance and greatly improving belt life.

Moreover, in the case of the present invention, since the reinforcing material of each flat belt is provided with a concave groove, which is fitted into and surrounded by the groove, not only is there no fraying of the exposed tensile material on the side surface of the belt, but Because the flat belt is positioned accurately by the groove, there is no vibration or meandering of the belt, and the belt can be driven in an extremely normal manner. The voids existing between both sides have a heat dissipation effect when the belt is driven, making it easy to process and exhibiting even better performance as a high-load transmission belt.

Note that it is more advantageous to use a porous sintered structure having self-lubricating properties as described above for the reinforcing material, since it is possible to prevent noise, wear, and seizure due to heat generation during belt drive.

[Brief explanation of the drawing]

1 to 8 are sectional views of embodiments showing various tightening and fixing modes of the high-load transmission belt according to the present invention. a... Belt body, b... Flat belt, 1...
Rope tension body, 2... Rubber-like elastic body, 3... Reinforcement material, 4... Concave groove, 5... Reinforcement plate, 7... Fixing material,
7a...Threaded bolt, 7b...Bolt, 7c
...Natsuto.

Claims (1)

[Scope of Claims] 1. A cog-shaped reinforcing material is disposed at the lower part and a reinforcing plate at the upper part, respectively, on the upper and lower sides of a flat endless belt, facing each other in a direction perpendicular to the longitudinal direction of the belt, and the upper and lower reinforcing plates, In a high-load power transmission belt formed by passing through the flat belt and tightening and fixing it with a fastening material such as a bolt, the top surface of the cog-shaped reinforcing material has a width approximately equal to or slightly larger than the width of the flat belt. The flat belt is fitted and held in the groove, and gaps are provided on both sides of the upper and lower reinforcing plates, and the reinforcing plate is formed when the belt is driven. A high-load power transmission belt characterized in that heat generated between reinforcing materials can be dissipated through the gaps. 2. The high-load power transmission belt according to claim 1, wherein the flat endless belt is a belt in which low elongation and high strength rope tensile bodies are spirally embedded in parallel in a rubber-like elastic body. 3. The flat belt has low elongation, high strength rope tension members embedded in a spiral shape in parallel in a rubber-like elastic body.
The high-load power transmission belt according to claim 1, which is a belt having one to a plurality of canvas layers laminated and adhered to the surface thereof. 4 The upper reinforcing plate has a convex step on its lower surface that fits into the groove of the reinforcing material, and when the flat belt is fitted,
The high-load transmission belt according to claim 1, 2, or 3, wherein a gap exists between the reinforcing plate and the reinforcing material on both sides. 5. The high-load power transmission belt according to any one of claims 1 to 4, wherein the depth of the groove of the reinforcing material is smaller than the belt thickness of the flat belt. 6. The high-load power transmission belt according to any one of claims 1 to 4, wherein the depth of the groove of the reinforcing material is the same as or larger than the belt thickness of the flat belt. 7. The high-load power transmission belt according to any one of claims 1 to 6, wherein the reinforcing material is a metal rod or a metal pipe. 8. The high-load power transmission belt according to claim 7, wherein the reinforcing material is selected from the group consisting of aluminum or its alloy, iron or its alloy. 9. The high-load power transmission belt according to any one of claims 1 to 6, wherein the reinforcing material is a rod or pipe made of resin or reinforced resin. 10. The high-load power transmission belt according to any one of claims 1 to 6, wherein the reinforcing material is wood or plywood. 11 Claim 1 in which the reinforcing plate is a metal plate
The high-load transmission belt according to any one of items 1 to 10. 12. The high-load power transmission belt according to claim 11, wherein the metal plate is made of a metal selected from the group consisting of aluminum or its alloy, iron or its alloy. 13. The high-load transmission belt according to any one of claims 1 to 10, wherein the reinforcing plate is a resin plate or a reinforced resin plate. 14. The high-load power transmission belt according to claim 13, wherein the resin is a resin selected from the group consisting of ABS resin, acrylic resin, nylon resin, polyester resin, and polyimide resin. 15. The high-load power transmission belt according to any one of claims 1 to 10, wherein the reinforcing plate is made of wood or plywood. 16. The high-load transmission belt according to any one of claims 1 to 15, wherein the fastening materials are bolts and nuts. 17. The high-load power transmission belt according to any one of claims 1 to 15, wherein the fastening material is a threaded bolt.