JPS6244180Y2 - - Google Patents

Description

[Detailed explanation of the idea]

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 of the cog part is usually flexible, when it is fitted to the pulley and driven, the entire belt bends in the lateral direction and falls into the pulley. There are problems such as a decrease in transmission force due to deformation and early breakage. Therefore, wood has conventionally been the most commonly used material to improve the lateral pressure resistance of such belts, but recently the use of various resins and metals has also been adopted, and particularly rigid metals have been used for belt cogs. Attempts have been made to use pipes, rods, resin pipes, rods, etc. However, due to the recent improvement in the required transmission horsepower, wood has become unusable due to its strength, and resin has become unusable due to its strength and abrasion. Aluminum metals have various drawbacks, such as abrasiveness, and iron-based metals have difficulty running at high speeds due to their high specific gravity. Therefore, further improvements were subsequently made, and the inventors of the present invention first arranged a reinforcing plate on the upper part of a flat belt and a cog-shaped reinforcing material on the lower part, and used fastening materials such as bolts to attach the reinforcing plates to each other. We proposed a high-load power transmission belt that passes through a flat belt and a reinforcing material, and is tightened and fixed in one piece. As part of this, the present invention focuses on the material of the cog-shaped reinforcing material of the flat belt and aims to further improve the lateral pressure resistance, and uses thermosetting resin such as thermosetting phenolic resin. The present invention is characterized in that the reinforcing material is composed of a trapezoidal block material made of this material as a main component and to which a laminated canvas is bonded. 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. Including both flat endless belts. Hereinafter, specific embodiments of the belt of the present invention will be described with further reference to the accompanying drawings. FIG. 1 shows an example of a trapezoidal block V-shaped cog belt with a cog-shaped reinforcing material according to the present invention.

[Natural rubber], SBR

[Styrene/butadiene rubber], CB

[Chlorobrene rubber], NBR

[Nitrile rubber], IIR

[Butyl rubber], Hypalon

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. In the figure, the rubber-like elastic layer 2 is covered with nylon canvas. , Kepler

[Trade name] One to multiple layers, usually one to three layers, of bias canvas or wide-angle canvas 3 made of canvas or warp and warp yarns are laminated and pasted,
Further, in the elastic layer 2, rope tension members 1 having high strength and low elongation, such as polyester, aliphatic polyamide, aromatic polyamide, glass fiber, or wire strands, are embedded in a spiral manner in parallel. A stretchable canvas 4 made of the same material as the upper canvas 3 or woven with woolly-processed crimped nylon warp and ordinary nylon weft is layered below the canvas. Further, the flat belt main body b has a reinforcing plate 6 on its upper part, and a trapezoidal block of cog-shaped reinforcing material, which is the main part of the present invention, on its lower part, and these reinforcing plates 6, The flat belt b and the trapezoidal block 5, which is a reinforcing material, are connected to the bolt 7a and the nut 7.
As shown in FIG. 2, it is penetrated and integrally tightened and fixed by a fastening material 7 made of b. Of these, trapezoidal block 5 forming the cog-shaped reinforcement
constitutes a characteristic part of the present invention, and is disposed in the lower part of the flat belt main body b in a direction perpendicular to the longitudinal direction of the belt, and a plurality of layers of canvas are laminated and placed in a thermosetting resin such as phenol resin, Constructed from hardened material. Various materials can be used for the canvas used here, such as cotton cloth, glass cloth, and synthetic fiber cloth, but cotton canvas is the most practical. Further, the number of layers to be laminated is appropriately selected to constitute a trapezoidal block. On the other hand, the reinforcing plate 6 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 ABC resin, acrylic resin, nylon resin, polyester resin, polyimide resin, etc. resin plate or
FRP

[Reinforced resin board] is used. In addition, in the illustrated configuration example above, the flat belt body b
The trapezoidal block 5 disposed on the lower side is made by laminating canvases arranged horizontally, impregnating this with thermosetting resin, charging it, and hardening it into a trapezoidal shape. The structure is not limited to the one exemplified above, and various embodiments are possible. Figures 3-3 and 4 illustrate various aspects of the trapezoidal block 5 of the present invention. In each example in Figure 3, canvases are arranged vertically or diagonally. Shiro furthermore vertically,
Those that are arranged in a wavy manner in horizontal and diagonal directions C, D, and E, and those that are formed into a trapezoid shape by including the portion 5a made of thermosetting resin in each of the above examples.

[Furthermore, in Fig. 4, various types of canvas are shown, such as a canvas made into a spiral shape. However, these are, of course, illustrative, and it goes without saying that other modifications are possible as long as they do not deviate from the configuration in which the canvas is laminated and the thermosetting resin is charged. In each of the above examples, phenolic resin is most commonly used as the thermosetting resin, but epoxy resin and other known resins may also be used depending on their properties. In addition, in the illustrated examples of Figures 1 and 2, bolts 7a and nuts 7b are used to tighten and fix the reinforcing plate 6, trapezoidal block 5, and flat belt body b, but these also may be replaced by other means. , for example, Fig. 1, Fig. 2
Contrary to the illustration, the bolt may be passed from below and tightened with a nut on the upper surface of the belt.Alternatively, a thread groove may be carved in the reinforcing material 5 in advance, and a bolt with a threaded end at the tip may be inserted from above. It may also be tightened and fixed. Furthermore, not only bolts but also rivets can be used to fix the upper and lower parts of the belt.
It is also possible to weld the contact portion between the bolt and the nut as shown in FIGS. The bolts are generally made of iron or brass [Table] As described above, the power transmission belt of the present invention has a trapezoidal block made of a canvas laminate placed in a thermosetting resin and hardened, arranged at the bottom of the flat belt. This material has been formed with a shaped reinforcement material, which improves the shortcomings of conventional resins and metal materials, and greatly improves lateral pressure resistance.It also reduces the slip rate and prevents deformation, thereby increasing the transmission force per cross-sectional area. Moreover, as mentioned above, it exhibits a remarkable effect on durability and has a remarkable effect on increasing belt life. In particular, the use of thermosetting resin in this invention prevents the deterioration of physical properties caused by belt slippage and heat generated from bending, and the addition of laminated canvas provides wear resistance. This is a major feature that improves the characteristics of conventional belts.

[Brief explanation of drawings]

Figure 1 shows one of the high-load transmission belts according to the present invention.
A perspective view showing an example, FIG. 2 is a sectional view of the same, and FIG.
4 are sectional views showing various aspects of the trapezoidal block, and FIG. 5 is a graph comparing the transmission force between the belt of the present invention and other belts. a... Belt body, b... Flat belt, 1...
Rope tensile body, 2...Rubber-like elastic body, 3...Flat belt upper canvas, 4...Flat belt lower canvas, 5
... Trapezoidal block, 5a ... Thermosetting resin, 6...
...Reinforcement plate, 7...Fixing material, 7a...Bolt, 7b
...Natsuto.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A trapezoidal block is fixed to a flat belt in which low elongation, high strength rope tensile bodies are embedded in parallel in a rubber-like elastic body in a spiral manner by tightening and fixing the trapezoidal blocks with fastening materials such as bolts. 1. A high-load power transmission belt, characterized in that the block material is made of a thermosetting resin and is made of laminated or spirally charged canvas. 2. The high-load power transmission belt according to claim 1, wherein the thermosetting resin is a phenolic resin.