JPH036139Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention relates to a motor whose frame and bracket are made of steel plates. Two types of bearings, a ball bearing and a sleeve bearing, are commonly held by one type of bracket, and the parts are The aim is to standardize the

Conventionally, this type of motor has been shown in FIGS. 1 and 2.

Figure 1 shows a motor using ball bearings.
In the figure, reference numeral 1 denotes a bracket, and this bracket 1 is formed with a cylindrical protrusion 1a, and a ball bearing 2 is fitted into the inner circumference of the protrusion 1a to pivotally support a rotating shaft 3. 4 is a stator, and the above bracket 1
is fixed.

FIG. 2 shows a motor using a sleeve bearing. In the figure, 7 is a bracket, and 6 is a sleeve bearing with a spherical surface and a semicylindrical cross section. This sleeve bearing 6 is connected to the holding part 7a of the bracket 7. It is held between the leaf spring 8 and the rotary shaft 3. 10 is an end cover,
The end cover 10 and the leaf spring 8 house an oil-impregnated material 9, and the lubricating oil contained in the oil-impregnated material 9 lubricates the sliding portion between the sleeve bearing 6 and the rotating shaft 3. The leaf spring 8 and the end cover 10 are fixed to each other by a bent fixing part 7c formed by bending the protrusion 7b of the bracket 7. Furthermore, by holding the sleeve bearing 6 with an appropriate holding force due to the spring force of the leaf spring 8, the sleeve bearing 8 is provided with a self-aligning function with respect to the rotating shaft 3.

By the way, in general, in motors, especially small motors, ball bearings are used when the bearings are used for long life, high load or high temperature applications, and ball bearings are used for short life and light load applications. Sleeve bearings are used.

Therefore, for conventional steel plate motors, it is necessary to prepare two types of brackets corresponding to the bearings used, that is, ball bearings and sleeve bearings, and these two types of brackets are classified, stored, managed, and used. The assembly process becomes complicated because the motor is used according to the number of motors, and two types of expensive molds for drawing and forming the steel plate must be prepared, which increases the price of the motor.

This idea was made to eliminate the above-mentioned drawbacks of the conventional bearings, and the bracket was shared so that it could be used for both ball bearings and sleeve bearings.
Furthermore, the present invention aims to simplify the assembly process without increasing the number of parts even when sleeve bearings are used, and to provide an inexpensive steel plate motor.

An embodiment of this invention will be described below with reference to FIG.

In the figure, 11 is a bracket, and this bracket 11 is formed with a cylindrical protrusion 11a. Reference numeral 6 denotes a sleeve bearing that pivotally supports the rotating shaft 3, and this sleeve bearing 6 is held between a leaf spring 13 made of an elastic material fixed to the bent fixed portion 11b of the bracket 11 and a bearing support 12 made of a thin steel plate. ing. Reference numeral 14 denotes an oil-impregnated material, which is housed between the inner periphery of the protrusion 11a of the bracket 11 and the leaf spring 13.

In the above embodiment, the sleeve bearing 6 is held between the leaf spring 13 made of an elastic material and the bearing support 12, but if the sleeve bearing 6 is held between the two leaf springs 13, the rotating shaft 3 Since the vibrations from the bracket are absorbed by the leaf spring 13, which is an elastic material, and are not directly transmitted to the bracket 11, a motor with low vibration and low noise can be obtained. Further, since the protruding portion 11a of the bracket 11 is used for storing the oil-containing material 14, there is no need to take the trouble to provide the end cover 10 shown in FIG. 2, and the number of types of parts can be reduced accordingly.

The configuration shown above is for the case where the bearing is a sleeve bearing, but if a ball bearing is used, the ball bearing is fitted on the inner circumference of the protruding part 11a of the bracket 11, and the rotating shaft is supported by this ball bearing. 3 should be pivoted.

As described above, this invention has the effect of making the bracket compatible with both ball bearings and sleeve bearings, making it easier to store the bracket and reducing the cost of the motor.

[Brief explanation of the drawing]

Fig. 1 is a half-part sectional view showing the bracket part of a conventional motor using ball bearings, Fig. 2 is a half-part sectional view showing the bracket part of a motor using sleeve bearings, and Fig. 3 is a part-part sectional view showing the bracket part of a motor using sleeve bearings. FIG. 3 is a half-part sectional view showing the bracket portion of the motor according to the embodiment. In the figures, the same reference numerals indicate the same or equivalent parts, 2 is a ball bearing, 3 is a rotating shaft, 6 is a sleeve bearing, 11 is a bracket, 11a is a protrusion, 1
1b is a bending fixing part, 12 is a bearing support, 13 is a leaf spring, and 14 is an oil-impregnated material.

Claims (1)

[Scope of utility model registration request] In a steel plate motor equipped with a steel plate bracket and a rotating shaft that is rotated and held by a bearing held by the bracket, the bracket has a hollow space that protrudes in the direction of the rotating shaft at the center thereof and into which a ball bearing can be attached. What is claimed is: 1. A motor made of a steel plate, characterized in that a protruding portion having a cylindrical shape and a mounting means for abutting an outer circumferential portion of a sleeve bearing and attaching a clamping member of the sleeve bearing are formed on the protruding portion.