JPS61296932A - Production for thrust washer of motor - Google Patents

Abstract

PURPOSE:To produce a thrust washer at low cost disusing a new material by punching as the material the waste material caused in punching the spring for bearing part fixing in case of the production of the thrust washer for motor. CONSTITUTION:The thrust washer 1 is produced by punching it in annular shape by making the inner diameter side engaging with a rotor shaft a circular hole and with the discoid waste material caused in punching the circular hole thereof as the blank material, in case of producing by punching from the blank material the spring 3 for fixing the bearing part of the motor using an oil impregnated metal on the bearing part of the rotor shaft. By utilizing the punched waste material of the spring 3 for fixing the bearing part the thrust washer 1 is produced with a waste utilization without using a new material especially, so the material cost becomes almost free and the thrust washer can be produced at extremely low cost.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention particularly relates to a method of manufacturing a thrust washer for an electric motor using an oil-impregnated metal in the bearing portion of a rotor shaft.

[Conventional technology]

The use of oil-impregnated metal in the bearing portion of the rotor shaft is employed in various electric motors, and the bearing portion using the oil-impregnated metal is fixed by a spring engaged with the rotor shaft. This fixing spring is formed by press working, and is punched out from an unprocessed blank material using a press machine. on the other hand,
The above rotor shaft is equipped with a thrust washer.
twasher) is set and receives the thrust in the axial direction. As shown in FIG. 2, this thrust washer 1 is punched out from another unprocessed blank material 2 using a press machine, and is formed by a separate press process from that of the fixing spring.

[Problem that the invention seeks to solve]

Conventional thrust washers for electric motors are manufactured by being punched out from a special blank material as described above, which has the problem of requiring a large amount of material and increasing manufacturing costs.

The present invention has been made in view of these problems and provides a method for manufacturing a thrust washer for an electric motor that reduces manufacturing costs without wasting materials.

[Means for solving problems]

The method for manufacturing a thrust washer for an electric motor according to the present invention involves punching out a fixing spring for fixing a bearing portion of a rotor shaft from a blank material, and at the same time stamping out the same unnecessary material corresponding to the portion of the fixing spring that engages with the rotor shaft. The thrust washer is punched out from a blank material.

[Effect]

Since the thrust washer is punched from the same blank material from which the fixing spring was punched, no material is wasted and manufacturing costs are reduced.

〔Example〕

An embodiment of this invention will be described below.

As shown in FIG. 1, the method for manufacturing a thrust washer according to the present invention is such that when a fixing spring 3 made of oil-impregnated metal that fixes a bearing part is punched out of a blank material, it engages with a rotor shaft (not shown). The matching inner diameter side is a circular hole,
The unnecessary internal material is punched out into a circular ring shape.
This is used as the thrust washer 1.

That is, the thrust washer 1 is set on the rotor shaft of an electric motor and rotates together with the shaft, and is required to have high hardness.
Since it is required to have properties as a spring, it is required to have high hardness. In this way, since the required hardness for both is approximately the same, it is possible to form the fixing spring 3 and the thrust washer 1 from the same material (blank material) by press working. At this time, as described above, the circular unnecessary material of the portion of the fixing spring 3 that engages with the rotor shaft is punched out into a ring shape to form the thrust washer 1.

In this way, first, the material (blank material such as SK material) is put into the press machine, and the blanking (B ranking) is performed.
After that, the fixing spring 3 and thrust washer l are separated. In this way, the thrust washer I can be manufactured without wasting materials.

The thrust washer 1 punched out at the same time as the fixing spring 3 may be shaped using the same press machine, or may be taken out separately and processed using another press machine.

〔Effect of the invention〕

As explained above, according to the present invention, when punching out the fixing spring of the bearing part, the thrust washer is simultaneously punched and manufactured using an unnecessary member on the inner diameter side, so there is no wastage of material, and manufacturing The effect of reducing costs can be obtained.

[Brief explanation of drawings]

FIGS. 1(a), (b), and (C) are explanatory diagrams of a manufacturing method according to the present invention, and FIGS. 2(a) and (b) are explanatory diagrams of a conventional example.

Claims (1)

[Claims] In a method for manufacturing a thrust washer for an electric motor equipped with a fixing spring that fixes a bearing part of a rotor shaft,
An electric motor characterized in that, at the same time that the fixing spring is punched out of a blank material, a thrust washer is punched out of the same unnecessary blank material corresponding to a portion of the fixing spring that engages with the rotor shaft. A method of manufacturing a thrust washer.