Commutator turning support

Abstract

The invention discloses a commutator turning support, and relates to the technical field of fan manufacturing and machining. The commutator turning support comprises a support body, a first bearing and a second bearing are arranged inside the support body, an arc-shaped groove is formed in the support body, and the outer edge of the first bearing and the outer edge of the second bearing extend out from the inner wall of the arc-shaped groove to form a rolling supporting portion. According to the commutator turning support, a bearing rolling bearing mode is adopted in the bearing point of a main shaft, driving force for machining is lowered, meanwhile, a pressure blowing mode is adopted, lubricating and cooling functions are effectively realized on relative movement of the bearings and the main shaft, and meanwhile a chip discharging function is achieved as well.

Description

technical field [0001] The invention relates to the technical field of fan manufacturing and processing, in particular to a commutator turning support. Background technique [0002] Before the rotor assembly is dynamically balanced and assembled, it needs to go through two commutator turning processes to ensure the roughness of the contact surface between the commutator and the carbon brush and the concentricity with the main shaft, so the outer circle of the main shaft is used as the positioning during turning and support points. In the prior art, the main shaft positioning support point adopts V-shaped surface support (such as figure 1 As shown), the rotation is in friction contact mode; the material of the V-shaped bearing surface 100 is gemstone or hard alloy insert, and the rotation speed when processing the commutator 3 is between 1500-3000n / min, and the driving pressure during processing is Larger, it is necessary to lubricate the V-shaped bearing surface 100, and t...

AI Technical Summary

Problems solved by technology

In the prior art, the main shaft positioning support point adopts V-shaped surface support (such as figure 1 As shown), the rotation is in friction contact mode; the material of the V-shaped bearing surface 100 is gemstone or hard alloy insert, and the rotation speed when processing the commutator 3 is between 1500-3000n / min, and the driving pressure during processing is Larger, it is necessary to lubricate the V-shaped bearing surface 100, and the frictional heat produces oil and gas pollution, which affects the performance of the commutator 3; at the same time, the frictional heat softens the coating on the contact surface of the main shaft 30, forming a small amount of wear and peeling. On motors using oil-impregnated bearing structures, wear and peeling directly affect the assembly accuracy and service life of the motor

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