JPH0142682Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention suppresses heat generation in a belt for high-load power transmission, especially a belt in which blocks are arranged at a required pitch perpendicular to the longitudinal direction of a flat belt. This invention relates to high-load power transmission belts with improved transmission performance and durability.

(Prior art) A V-belt generally wraps around a pulley and transmits power by the frictional force at the interface between the pulley and the belt, so it is easy to wrap around the pulley. The belt needs to have low buckling and high rigidity to the extent that it can withstand the pressure between the pulley and the belt.

Therefore, in order to improve the lateral pressure resistance of the above-mentioned belt, wood, highly rigid metal rods, pipes, resin pipes, resin rods, etc. are used for the belt cogs.
Furthermore, it has been proposed to use canvas impregnated with rubber or thermosetting resin and deformed into a spiral shape (for example, Utility Model Application No. 58-48727), as well as various designs with blocks arranged on the top and bottom. A block belt for high-load power transmission was proposed.

FIG. 5 shows a typical example of such a block belt for high-load transmission, in which the lower surface of the flat belt 1 base, in which the rope tension member 3 is embedded in parallel in the rubber-like elastic member 2, that is, the contact side with the pulley. Blocks 4 are arranged at required pitches in the longitudinal direction of the belt, and blocks 5 are also arranged on the upper surface of the belt, and these are integrally tightened and fixed with bolts 6 or the like.

However, in a belt with blocks as described above, the sides of the upper and lower blocks 4 and 5 are both in contact with the pulleys, which causes bending of the flat belt, slippage between the blocks and the pulleys, etc. Heat generation occurs in the belt due to pulley tangential and axial slippage, or buckling deformation within the elastic limits of the blocks.

The heat generated by the belt inevitably affects and influences the transmission performance and durability.

Therefore, in order to suppress such heat generation, various measures have been considered in the past, including (a) using belt structures and materials that generate less heat; (b) Use materials that can withstand heat generation. (c) Suppressing heat generation through heat radiation. Such measures have been taken.

(Problems to be solved by the invention) The present invention addresses the above-mentioned actual situation and overcomes the above-mentioned difficulties by improving the heat dissipation especially in the structure of the flat belt in relation to the pulleys. The aim is to suppress heat generation and ensure suitable performance.

(Means for Solving the Problem) That is, the feature of the present invention is that a metal wire with good heat conduction is used at least in a high-load power transmission belt having blocks at required pitches perpendicular to the longitudinal direction of the flat belt. The wire rod end is buried in the flat belt so that it is exposed on the side surface of the flat belt.

Here, the metal wire is a metal wire or a twisted wire thereof, and may be buried either above or below the rope tensile body embedded in the flat belt, or may be buried in both the top and bottom. Regarding the manner in which the metal wires are buried, the metal wires may be arranged and buried in a direction perpendicular to the longitudinal direction of the flat belt, or they may be arranged and buried in a biased manner.

In order to arrange and bury it in the right angle direction, it is necessary to use not only metal wires but also other natural fibers, organic fibers,
It is also preferable to mix threads made of inorganic fibers and arrange them between the metal wires as needed.

In addition, it is preferable that such a perpendicular arrangement be connected with a fine warp thread and buried in a sagging pattern so as not to come apart.

On the other hand, it is more preferable to embed the bias-like cross-array in the form of a bias fabric than to maintain the shape.

In addition, as the metal material in the above metal wire material,
Examples include aluminum or its alloys, copper, zinc or its alloys, chromium, iron, nickel alloys, tin alloys, etc. Also included are iron or iron alloys plated with copper, zinc, tin, etc. on the surface.

(Function) As described above, a metal wire with good thermal conductivity is
When the metal wire is buried with its end exposed on the side surface of the flat belt, even if the belt generates heat when the exposed end of the metal wire is suspended in contact with the pulley, the heat is transferred through the metal wire and the pulley is suspended. Since heat is radiated through the belt, heat generation of the belt can be suppressed.

(Embodiments) Hereinafter, embodiments of the present invention will be further described with reference to the accompanying drawings.

FIG. 1 is a cross-sectional view of a high-load power transmission belt according to the present invention. In the figure, first, as a belt structure, rope tension members 3 are buried in parallel in a rubber-like elastic body 2. The structure in which blocks 4 and 5 are arranged perpendicular to the direction and are integrally tightened and fixed by bolts 6 etc. is not significantly different from the previous structure, but the rope tension member 3 of the flat belt 1 As a feature of the present invention, layers made of metal wire material 7 with good thermal conductivity are provided above and below.

As is known, the flat belt 1 is made of NR (natural rubber), SBR.
(styrene-butadiene rubber), CR (chloroprene rubber), NBR (nitrile rubber), IIR (butyl rubber),
It is made of a single material such as Hypalon (chlorosulfonated polyethylene) or a blend or polyurethane rubber, and the rope tension body embedded inside it is made of polyester, polyamide, aromatic polyamide (trade name, Kevlar), glass fiber, metal. Made of fiber, etc.

In addition, the blocks placed above and below the flat belt are
By spirally forming or laminating canvases impregnated with epoxy resins, phenolic resins, polyamide resins, melamine resins, etc., or canvases coated with rubber, coated with rubber, glass fibers, etc. It is constructed by laminating or spiraling canvas made of cotton, nylon, polyester, pinylon, etc. alone, blended, or mixed. It is also made of hard rubber with a hardness of 85 degrees or more. It is formed.

Therefore, in the above-mentioned configuration, the present invention is characterized in that, as described above, a layer made of the metal wire 7 is disposed above and below the rope tension member 3 of the flat belt 1, but the specific embodiment of this layer is Some of them are illustrated in FIGS. 2 to 4.

First, FIG. 2 shows the case where the metal wires 7 are arranged in a direction perpendicular to the longitudinal direction of the flat belt.
The figure shows a case where the same metal wire rods 7 are arranged to cross the longitudinal direction of the flat belt in the bias direction.

Furthermore, in FIG. 4, nylon, polyester,
Vinylon, polyamide e.g. Kevlar (trade name)
An example is shown in which one or more strands 8 made of organic fibers such as or inorganic fibers such as natural or glass fibers are mixed.

Each of these examples is selected as appropriate, but in all cases, the end of the metal wire 7 must be exposed on the side surface of the flat belt 1, and in particular, organic, inorganic, Those in which wires made of natural fibers are mixed are advantageous in terms of weight reduction, cost reduction, and improvement in flexibility.

As mentioned above, it is preferable to use a sagging pattern when embedding the wafers in a perpendicular direction, and to use a bias woven fabric when embedding the wafers in a biased manner.

The present invention is constructed as described above, and therefore, when the belt is suspended with the exposed end of the metal wire having good heat conductivity in contact with the pulley, the heat generated in the belt is transferred to the metal wire and the pulley. Heat is radiated to the outside through the belt, suppressing heat generation in the belt.

Note that the heat transferred to the pulley can be radiated and absorbed by appropriate known means.

(Effects of the invention) As described above, the present invention is a flat belt in which a metal wire is embedded and both ends thereof are exposed on the side surface of the flat belt.In particular, the structure of the flat belt is designed to improve heat dissipation in relation to the pulleys. By tightening the belt, it overcomes the effects on transmission performance and durability caused by heat generation such as bending of the flat belt, slippage between the block and pulley, slippage in the tangential and axial directions of the pulley, or buckling deformation within the elastic limit of the block. As a high-load transmission belt, it suppresses heat generation and ensures suitable performance, even if the belt generates heat due to belt operation.
Since the heat can be conducted outward through the metal wire inside the belt and radiated through the pulley,
It is possible to suppress heat generation in the belt, thereby preventing a reduction in transmission function and deterioration of the belt due to heat generation in the belt, and has the effect of increasing the life of the belt.

Furthermore, since metal wire is used, the cost is relatively low and there are also advantages in that it can be expected to be effective in reinforcing the belt.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view in the width direction showing an example of a high-load transmission belt according to the present invention, FIGS. 2 to 4 are explanatory diagrams showing the arrangement of metal wires forming the main part of the present invention, and FIG. 1 is a cross-sectional view in the width direction showing the basic structure of a known high-load power transmission belt. 1...Flat belt, 2...Rubber-like elastic body, 3...
Rope tension body, 4, 5...block, 7...metal wire.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A power transmission belt consisting of blocks arranged at required pitches in the perpendicular direction along the longitudinal direction of a flat belt in which rope tensile members are embedded in parallel in a rubber-like elastic body, which has thermal conductivity. 1. A high-load power transmission belt, characterized in that metal wires of good quality are arranged on the upper and lower surfaces of the flat belt so that at least the ends of the wires are exposed on the side surfaces of the flat belt. 2. The high-load power transmission belt according to claim 1, in which metal wires with good thermal conductivity are arranged and embedded in a direction perpendicular to the longitudinal direction of the flat belt. 3 Utility model registration claim 1, in which a metal wire with good thermal conductivity and other natural, organic, or inorganic fiber materials are mixed and oriented and embedded in a direction perpendicular to the longitudinal direction of the flat belt. High load transmission belt. 4 Utility model registration claims Paragraph 1, Paragraph 2 or The high-load transmission belt according to item 3. 5. The high-load power transmission belt according to claim 1, which is a utility model registration, in which metal wires having good thermal conductivity are arranged and embedded in a bias direction with respect to the longitudinal direction of the flat belt. 6. The high-load power transmission belt according to claim 5, in which a metal wire is embedded in the form of a bias-like fabric. 7. The high-load power transmission belt according to any one of claims 1 to 6, wherein the metal wire is a metal wire or a twisted wire thereof. 8 Claim No. 1 for Utility Model Registration in which the metal wire is made of at least one metal selected from the group consisting of aluminum and its alloys, zinc and its alloys, chromium, iron, nickel and its alloys, tin and its alloys. The high-load power transmission belt according to any one of items 1 to 7. 9 The metal wire has copper (Cu) on the surface of iron or iron alloy.
Claim No. 1 for Utility Model Registration consisting of a plated metal selected from zinc (Zn) and tin (Sn)
The high-load power transmission belt according to any one of items 1 to 7.