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Double-row chain pulley

A double-row sprocket and sprocket technology, which is applied in belts/chains/gears, portable lifting devices, hoisting devices, etc., can solve the problem that the weight of the finished product is less than one-third of the weight of the blank, the cutting volume is large, and the processing is complicated. problems, to achieve the effect of saving steel consumption, high pass rate, and reducing the amount of cutting processing

Inactive Publication Date: 2009-01-28
象山爵溪明嘉机械厂
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The double-row sprocket is widely used in the transmission device because its transmission force is much larger than that of the single-row sprocket. The double-row sprockets currently used are all made of rough round steel by cutting; The round steel is processed into a double-row sprocket with multiple teeth and a shaft hole in the center. The cutting volume is large, and the weight of the finished product is less than one-third of the weight of the blank. Special hobbing equipment is required, and the processing is complicated. high cost

Method used

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Embodiment Construction

[0013] Depend on figure 1 and figure 2 As shown, a double-row sprocket of the present invention includes a sprocket body 2, a gear tooth 1 integrated with the body, and a shaft hole 3 in the center of the body; it is basically formed by No. 45 steel through lost wax casting, and the shaft The left end part of the hole is cut and processed into a hole that matches the bearing, and then the finished product is finished after the tooth surface is quenched; because the double-row sprocket has many teeth, taking the φ60 double-row sprocket as an example, the teeth are just As many as 28, the compactness of the casting is high, and the casting is difficult; the process and parameters used in the casting of the present invention are as follows:

[0014] a. The formwork needs to be cured at 800-850°C, and then cast after natural cooling to 600-650°C;

[0015] b. Heat the molten iron to 1650-1680°C, add expanded perlite powder to cover the molten iron, after 2-3 minutes, remove the ...

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Abstract

The invention discloses a double-row sprocket wheel which is used as a component for transmission movement and comprises a sprocket wheel body, wheel teeth and a shaft hole. The finished product of the sprocket wheel is obtained by steps that: the product is basically formed by No. 45 steel by the lost-wax casting; the left end part of the shaft hole is cut and processed into the hole that is matched with a bearing; then tooth surface is quenched to obtain the finished product. The technology adopted by the lost-wax casting and the parameters are as follows: a. a formwork needs to be cured at 800 DEG C to 850 DEG C and is cooled to the temperature of 600 DEG C to 650 DEG C naturally so as to carry out casting; b. iron melt is heated to the temperature of 1650 DEG C to 1680 DEG C and expanded perlite powder is added for covering the iron melt; after 2 to 3 minutes, scum in a furnace is removed by a mechanical way; then appropriate amount of SiC is added for deoxidation, after that the casting is carried out; c. only one sprue runner is provided. The double-row sprocket wheel uses the lost-wax casting to replace the manufacturing method of using roughcast round steel for cutting and processing, thus greatly reducing the cutting capacity and reducing the product cost; meanwhile, the technological parameters of the sprocket wheel are reasonable and the qualification rate is high, therefore, the quality of the manufactured product can fully accord with the actual use requirements.

Description

technical field [0001] The invention relates to the technical field of elements with teeth used for transmitting motion in a transmission device, in particular to a sprocket wheel. Background technique [0002] The double-row sprocket is widely used in the transmission device because its transmission force is much larger than that of the single-row sprocket. The double-row sprockets currently used are all made of rough round steel by cutting; The round steel is processed into a double-row sprocket with multiple teeth and a shaft hole in the center. The cutting volume is large, and the weight of the finished product is less than one-third of the weight of the blank. Special hobbing equipment is required, and the processing is complicated. high cost. Contents of the invention [0003] The object of the present invention is to provide a double-row sprocket to reduce the amount of cutting and reduce the manufacturing cost in view of the above-mentioned shortcomings of the pri...

Claims

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Application Information

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IPC IPC(8): F16H55/30B22C9/04
Inventor 林百宁
Owner 象山爵溪明嘉机械厂
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