Method for mounting plastic electric machine casing and bearing device

Abstract

The invention discloses a plastic motor case and bearing device installing method, where the bearing device comprises gland, oil containing bearing and oiled felt, and the method comprises the steps of: 1) firstly injection-moulding a plastic motor case with bearing cavity for reserving; and II) placing the oil-containing bearing and oiled felt in the bearing cavity, and then fixing the gland on the bearing room to fix them in the bearing cavity. And it has advantages of simple process, low manufacturing cost, coaxial matching, low operating heat and long service life.

Description

technical field [0001] The invention relates to a method for installing a plastic motor casing and a bearing device. Background technique [0002] In the prior art, the installation method of the motor casing and the bearing device is quite different according to the different materials, such as: 1), the motor casing adopts iron plate and is stretched and formed, and aluminum alloy or cast iron material is selected , after casting and machining; the motor housing made of the above metal materials has the following disadvantages when assembled with the bearing device: first, the metal housing has complicated processing technology, many processes and low yield, The product stability is poor, and the processing cost is high; moreover, the metal material pollutes the environment greatly, which is not conducive to environmental protection. 2) The motor shell is made by traditional injection molding process. The bearing is embedded in the mold and the shell is injection molded at...

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Problems solved by technology

[0002] In the prior art, the installation method of the motor casing and the bearing device is quite different according to the different materials, such as: 1), the motor casing adopts iron plate and is stretched and formed, and aluminum alloy or cast iron material is selected , after casting and machining; the motor housing made of the above metal materials has the following disadvantages when assembled with the bearing device: first, the metal housing has complicated processing technology, many processes and low yield, Poor product stability and high processing costs; moreover, metal materials pollute the environment, which is not conducive to environmental protection

2) The motor shell is made by traditional injection molding process. The bearing is embedded in the mold and the shell is injection molded at one time. When the motor shell made of the above plastic is assembled with the bearing device, there are still the following deficiencies: First: Since the bearing and the motor casing are formed at one time, the bearing is fastened on the casing, which is difficult to meet the installation coaxiality requirements, and the rotation flexibility of the shaft is poor, which affects the low-voltage starting of the motor; moreover, the mutual friction between the bearing and the rotating shaft of the casing is large , generate a lot of heat, affected by the plastic manufacturing of bearings, in severe cases, excessive heat will cause a fire; the fastened bearing does not form an oil storage tank, and cannot replenish lubricating oil, which makes the bearing poorly lubricated and the noise increases, and the operating effect is poor. The shell is easy to burst and get stuck, which reduces the service life

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