JPS5977147A - Belt for transmitting high load - Google Patents

Abstract

PURPOSE:To improve strength of a belt against lateral pressure and prolong its life, by putting a reinforcing member of metal bar or the like in the cog portion, disposing a reinforcing plate on the upper surface of the belt, and fastening the reinforcing member and the reinforcing plate so as to be securely held together. CONSTITUTION:Nylon canvas 4 in 1-3 layers is provided over the upper cushion rubber layer 2 adhering thereto, and ropes of high tensile strength, least elongating, as tension members 1 are parallelly embedded between cushion rubber layers 2, 3. On the under surface of the lower cushion rubber layer 3 are provided cog portions at constant pitches, the cog portion being covered with stretch canvas 5. A reinforcing member 6 of a metal bar of high rigidity is put in the cog portion of the lower cushion rubber layer 3. A reinforcing plate 7 of metal or plastic is disposed on the upper surface of the belt to oppose the reinforcing member 6, and the same is securely fastened to the reinforcing member 6 with a holding member 8.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a V-shaped cog belt for high-load transmission with a large diameter.

Conventionally, V-shaped puffer belts for power transmission have been made by laminating and pasting rubberized canvas on the surfaces of upper and lower cushion rubber layers in which loaf tension members are embedded in parallel, and providing wave-shaped puffer groups on the bottom surface of the belt, that is, the contact surface with the pulleys. However, since the cushion rubber of the cog part is usually flexible, when it is fitted to the pulley and driven, the entire belt bends in the lateral direction, causing damage to the pulley. There are problems such as deformation that causes a decrease in transmission force and early breakage.

Therefore, various countermeasures have been considered to date to improve the lateral pressure resistance, but no sufficient countermeasure has yet been obtained.

In response to the current situation, the present applicant has also been working on solving the above-mentioned problems with belts, and has been conducting various researches for some time.
Previously, we proposed in Utility Model Application No. 56-68''93 that the lateral pressure resistance could be improved by inserting a particularly rigid metal vibrator or rod into the belt cog portion.

However, after further study, it was discovered that when the above-mentioned metal rods, metal pipes, etc. are inserted into the cog part, shearing force is generated in the thin rubber layer between the tensile rope and the reinforcing layer during power transmission. Tensile stress. Compressive stress acts, causing mechanical fatigue in the rubber. Heat fatigue. It was discovered that there was a problem with the reinforcing material falling off due to tearing due to oil, etc.

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 metal reinforcing material of the belt and the metal boot will not only cause noise due to friction during operation, but also wear. Seizure occurs due to heat generation. Therefore, oil lubrication from the outside is required, but oil lubrication is avoided depending on the application, for example, when there is a hygiene problem, such as in food-related applications.

It has also been found that in this difficult case, the method described above is completely unusable.

That is, the present invention corresponds to the above-mentioned actual situation, and aims to provide a V-belt for high-load power transmission which is further improved by preventing the drawbacks of the above-mentioned device according to proposal 1, especially the former drawback 2. This is the purpose.

Therefore, the feature of the present invention that achieves the object of the present invention is that a reinforcing plate is arranged on the upper surface of the belt corresponding to the reinforcing material insertion cog portion, and the belt body is attached using a fastening material such as a bolt. Penetrates the reinforcing material of the puffer part and tightens it integrally. The purpose is to fix the reinforcing material and prevent it from falling off.

Of course, it is also important to prevent the shortcomings in the case of @Kinukusha, and in response to this, we separately proposed the use of a multi-hole sintered structure having self-lubricating properties.

Therefore, it is also contemplated that such configurations may be applied to the present invention.

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

FIG. 1 shows an example of the V-shaped cog belt according to the present invention, and in the figure (aJ is the V-shaped cog belt main body, (21[31
are NR (natural rubber), SBR [styrene-butadiene rubber], C'R (chloroprene rubber), NBR and tolyl rubber]. The upper and lower cushion rubber layers are made of a single material such as E-R (butyl rubber), NOIVALON (chlorosulfonated ethylene), a rubber that is an appropriate blend of these, or polyurethane rubber, and are on top of the upper O15 cushion rubber layer (2). Nylon canvas. Kevlar (trade name) canvas or bias canvas or wide-angle canvas (4) made of warp and warp yarns (4) is laminated in one to multiple layers, usually one to three layers, and the cushion rubber layer (21 (between 31) is made of polyester.

Aliphatic polyamide. Lobe tensile members (1) of high strength and low elongation, such as aromatic polyamide, glass fiber, or wire strands, are buried in parallel.

Then, the lower cushion rubber layer (3) is provided with cog portions at a constant pitch on the lower surface, and its outer periphery is made of the same material as the upper canvas (4) or crimped nylon warp treated with woolly and regular nylon warp. Stretch canvas woven with weft (
5) are arranged in layers.

Therefore, in the above two configurations ((5, 1 indicates a reinforcing member, which is inserted into the cog part of the lower cushion rubber layer (3) and is constituted by a rod or gib made of a highly rigid pot metal or resin. .A metal rod is particularly suitable.

This metal rod (6) is usually a highly rigid rod made of aluminum or aluminum alloy, or iron or iron alloy, and is inserted into the puffer cushion rubber layer +31, with the end exposed on the same plane as the side surface of the cog. There is a metal rod (
If 6) is exposed on the side of the belt, it will make a contact sound when it comes into contact with the pulley, and there is also the problem of damaging the pulley. Therefore, the aluminum rod (6) is slightly shorter than the width of the cog part. (3), and rubber may be coated and buried along the end of the rod (6).

In addition, it is particularly effective to use a rod made of a self-lubricating porous sintered structure as the reinforcing material (6), and is a preferred embodiment.

This self-lubricating porous structure is generally made of sintered metal or sintered ceramics impregnated with a lubricant such as lubricating oil or wax, and the metals include iron, porous sintered copper alone, iron- Copper mixed porous sintered metal is the most practical.

The reinforcing phase (6) to be inserted is a trapezoidal frame made of metal in the illustrated example, but it may also have a circular cross section or various other irregular cross-sectional shapes. It is also possible to use cross-sectional metal pipes and the like.

In addition, as the porous sintered structure, rod-shaped bodies with various arbitrary cross-sectional shapes can preferably be used, and the surface thereof may be coated with metal plating or resin coating to improve adhesion to the cushion rubber. is also valid.

The surface coating may be applied before or after the porous sintered structure is impregnated with the lubricant, but it is common to impregnate the porous sintered structure after the surface coating is applied.

This surface coating is usually carried out only on the portions that come into contact with the cushion rubber layer, and is not particularly required on the portions exposed on the side surfaces of the cog.

Metal plating includes copper, brass, zinc, and nickel.

Plating with tin, chromium, etc. can be applied, and the resin coating is preferably a heat-resistant resin, and resins such as BoIJ amide, polyester, and polycarbonate are used.

Next, (7) on the upper surface of the belt is a reinforcing plate that forms an important feature together with the reinforcing material (6) described in iiJ in the O invention, and is opposite to the reinforcing material (6). It is placed on the upper surface of the belt, and is fixed by a fastening member (8) consisting of a bolt and a nut in the figure along with the aforementioned reinforcing member (6).

This reinforcing plate (7) 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, Aku-1-Nor resin, nylon resin, polyester resin, polyimide resin, etc. Selected resin plates are used.

And in fixing the benefit with the reinforcement material (6),
Generally, as shown in Fig. 1, from above) (8al is replaced with reinforcing plate (7), belt cushion rubber layer +21
Penetrate through the reinforcing material (6) and tighten the nut [8b] on the underside of the blowfish.
) to tighten.

However, as shown in Figure 2, the bolt (8a) is passed through from below, contrary to Figure 1, and the nut (8a) is tightened on the upper surface of the belt.
(80) F It may be inserted and tightened.

Furthermore, it is limited to bolts, as shown in Figure 4 (Ill Vera (8e)
) can also be used to fix the top and bottom of the belt.

In each of the above cases, it is most stable to use bolts or rivets 2X on both sides as shown in the illustration, but it is of course possible to use one piece in the middle and tighten it firmly. do not have.

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

Thus, in the present invention, the reinforcing material (6) and the reinforcing plate (7)
are integrated by the fastening material (8), preventing the reinforcing material (6) from falling off and preventing fatigue of the rubber layer between the tensile member and the reinforcing material (6), maintaining excellent lateral pressure resistance. This contributes to high-load transmission.

As described above, in the power transmission V-belt of the present invention, a reinforcing material P made of aluminum or an aluminum alloy metal bar is inserted into the puffer part, a reinforcing plate is arranged on the upper surface of the belt, and the reinforcing material and the reinforcing plate are The tightening is fixed in one piece, and the reinforcing material eliminates any lateral deformation of the belt when it is fitted with the pulley, improving lateral pressure resistance compared to conventional cog belts, and achieving the deformation prevention effect described above. The transmission force per the same cross-sectional area can be increased! Moreover, by fixing the reinforcing material integrally to the reinforcing plate with bolts, etc., the shearing force generated between the reinforcing material and the tensile rope, which was a problem in the past, can be reduced, and most of it can be eliminated. It is supported by a fastening material that penetrates the reinforcing material and the reinforcing plate, and by dispersing the shearing force, it eliminates shear failure at the puffer part, prevents the reinforcing material from falling off, and further improves lateral pressure resistance and belt life. It has a remarkable effect of bringing about a wide range of ditto.

In addition, if a porous sintered structure with self-lubricating properties as described above is used as the reinforcing material, even when the reinforcing material is exposed on the side of the cog, it is possible to prevent noise during belt drive, wear, and seizure due to heat generation. It is possible and even more advantageous.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing an example of the V-belt according to the invention, F
2 F: A to 4th garden, each tightening is fixed mode 2
FIG. 3 is a cross-sectional view of the illustrated embodiment. [a)...Belt body, (1)...
・Rope tensile body. (2)・・・・・・Top cushion rubber. (3)・・・・・・Lower cushion rubber. (4)・・・・・・Upper canvas, (5)・・・・・・
Lower canvas. (6)...Reinforcement material, (7)...Reinforcement plate. (8)...Adhesive material, tea)...
···bolt.

[8b]...Natsuto, (8c) River...
・Bolt with thread. (8d)...Screw m, 1...
rivet.

Claims (1)

[Claims] Z One or more layers of rubber-covered canvas are laminated and adhered to the surface of a cushion rubber layer in which low-elongation, high-strength rope tension members are embedded in parallel, and the lower cushion layer of the tension members is In a cog-equipped V-belt in which cog portions in which reinforcing materials are embedded in a direction perpendicular to the longitudinal direction of the belt are provided at a required pitch, a reinforcing plate is disposed on the upper surface of the rubber-covered canvas facing the front reinforcing phase, A high-load power transmission belt characterized by fastening and fixing reinforcing materials and reinforcing plates using bolts or other fastening materials. (c) Claim 1 in which the reinforcing material is exposed on the side of the belt
High-load transmission belt as described in Section 1. 3. The high-load power transmission belt according to claim 1, wherein the reinforcing material is embedded in the puffer portion. 9. The high-load power transmission belt according to claim 1, 2, or 3, wherein the reinforcing material is a metal rod or a metal pipe. S. The high-load power transmission belt according to claim 4, wherein the reinforcing layer is selected from the group consisting of aluminum or its alloy, iron or its alloy. The high-load power transmission belt according to claim 1, 2 or 3, wherein the reinforcing material is a resin rod or pipe. 7. The high-load transmission belt according to any one of claims 1 to 6, wherein the reinforcing plate is a metal plate. The high-load transmission belt according to claim 7, wherein the metal plate is made of a metal selected from the group consisting of aluminum or its alloy, iron or its alloy. 2 Claims 1 to 6 in which the reinforcing plate is a resin plate
The high-load power transmission belt described in any of paragraphs. 10. The high-load power transmission belt according to claim 9, wherein the resin plate is made of a resin selected from the group consisting of ABS resin, acrylic resin, nylon resin, polyester resin, and polyimide resin. /Z The high-load power transmission belt according to any one of claims 1 to 10, wherein the fastening materials are bolts and nuts. 12. The belt for high-load power transmission according to any one of Claims 1 to 10, in which the fastening material is a threaded bolt.Claims 1 to 1, in which the fastening material is a bed.
The belt for high-load movement according to any of item 0.