Processing method for gear of electric wheelchair

An electric wheelchair and processing method technology, applied in the field of gear processing, can solve the problems of high vibration and noise, high processing cost, long production cycle, etc., and achieve the effects of improving service life, reducing processing procedures, and reducing tooth surface wear.

Active Publication Date: 2013-02-06
GUIZHOU QUNJIAN PRECISION MACHINERY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the material of electric wheelchair gears is 40Cr steel, which has the defects of steel gears. After the gears are assembled, the vibration and noise are large, the pass rate is low, and the process is complicated, the production cycle is long, and the processing cost is high.

Method used

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  • Processing method for gear of electric wheelchair

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Embodiment

[0014] Embodiment: a kind of processing method of electric wheelchair car gear, as figure 1 shown. The wheel blank of the gear is directly pressed and formed by iron-based powder metallurgy materials; the pressed wheel blank is processed by finishing the datum hole 2 and two positioning end faces 5, and the keyway 3 is drawn on the inner wall of the datum hole 2; and then For gear hobbing and shaving. Direct compression molding is to use iron-based powder metallurgy materials to simultaneously press out the center hole, cavity 1 and lightening hole 4 on the wheel blank. A machining allowance of 0.5-1 mm is left in the center hole, and the center hole is processed into a reference hole 2 by finishing turning. A machining allowance of 0.5-1mm is left on the two ends of the center hole, and the two ends of the center hole are machined into two positioning end faces 5 with a lathe. The gear shaving is to modify the tooth shape and direction of the gear by grinding the gear s...

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Abstract

The invention discloses a processing method for a gear of an electric wheelchair. A wheel blank of the gear is formed by directly pressing an iron-based powder metallurgy material; the wheel blank subjected to pressing formation adopts a fine turning manner to process a datum hole and two positioning end faces and a key slot is drawn on the inner wall of the datum hole; and then the hobbing and gear shaving processing are carried out. According to the invention, the rough turning processing and the heat treatment hardening and tempering process of the gear blank are saved; the processing on a cavity with a complex shape and a lightening hole on the gear blank are abolished; the production process only comprises the steps of carrying out fine turning on a datum, drawing the key slot, carrying out hobbing, carrying out gear shaving and carrying out rustproof packaging; the cost is reduced; the production period is shortened; after the gear is subjected to shaping treatment under the conditions of the tooth profile of 0.005 to 0.008mm and the tooth direction of 0.017 to 0.023mm, the noise reaches a low noise range of 62dB per inch, the operating abnormal sound of the gear is completely eliminated and the qualified rate of the product is over 98.5%.

Description

technical field [0001] The invention relates to a processing method for a gear of an electric wheelchair, and belongs to the technical field of gear processing. Background technique [0002] Electric wheelchairs used in homes and hospitals have high requirements on vibration and noise due to the special environment of use. At present, the material of electric wheelchair gears is 40Cr steel, which has the defects of steel gears. After gear assembly, the vibration and noise are large, the pass rate is low, and the process is complicated, the production cycle is long, and the processing cost is high. Contents of the invention [0003] The purpose of the present invention is to provide a method for processing electric wheelchair gears, which has simple processing technology, can reduce production costs, and realize mass production of electric wheelchair gears. The gear produced by the method has low vibration and noise after assembly, and is suitable for electric wheelchairs,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/14B22F3/02B22F5/08B22F1/00
Inventor 王建军
Owner GUIZHOU QUNJIAN PRECISION MACHINERY
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