JPS5893444A - Motor - Google Patents

Abstract

PURPOSE:To contrive the common use of the component parts of motors when motors of different output capacities are constructed by engaging a pair of casings of cylindrical shape with bottom so that the openings of the casings are superposed and providing projections on the outer periphery of the inside casing. CONSTITUTION:A pair of casings 1, 2 of cylindrical shape with bottom are engaged so that the openings are opposed in such a manner that one of the openings is disposed inside and the other is disposed outside, and bearings 6, 8 are held by swelled parts 15, 16 formed substantially at the center of the side plates 5, 6 of the respective casings 1, 2 and auxiliary supporting members 17, 18. A stator 4 having a coil 3 is rigidly engaged with the inner surface of the inside casing 1, and the rotational shaft 10 of a rotor 9 is rotatably supported via the bearings 6, 8. Collars 1a, 2a are projected at the openings of the respective casings 1, 2, the projected part of the wheel bank 1b or projection 1b' is formed on the circumferential direction at the engaged superposed part of the outside casing 2 at the outer periphery of the inside casing 1, thereby allowing the axial centers of the casings 1, 2 to coincide.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to electric motors, and more particularly to improvements in the casing of electric motors.

Generally, the motors for the blowers in air conditioners for heating and cooling use differ in motor output and installation dimensions for various types of equipment due to differences in the performance and shape of the heating and cooling equipment, so many types of motors must be manufactured. Therefore, the dimensions of the brackets, bearings, casings, etc. built into these electric motors differ for each model, and there are many types of parts, making it difficult to control the quality of various parts and difficult to save labor through mass production. Met.

In view of the above-mentioned points, the present inventor has developed a pair of bottomed cylindrical casings with their openings facing each other, with the aim of standardizing the casing and parts used, and saving labor through mass production of each model. However, it has been found that by fitting the rotors so that one is located inward and the other is located outward, the depth of the fitting can be changed as appropriate depending on the length of the rotor and stator, which have different output capacities.

However, when creating such a casing by deep drawing, the thickness of the steel plate made of various materials becomes uneven during the process, and therefore, even if precision is achieved on the inner surface of the casing, precision on the outer surface of the casing may not be achieved. I can't get it out. Therefore, when the inner and outer casings are superimposed, their respective axes do not coincide with each other, and as a result, the rotational axis of the rotor is inclined with respect to the axis of the stator, which may impede smooth rotation.

Therefore, in view of the above points, the inventor decided to provide accuracy on the inner surface of the inner casing and provide a protrusion on the outside of the inner casing. By bringing the inner surface of the outer casing into contact with the protrusion of the inner casing, the axes of the inner and outer casings can be aligned.

Hereinafter, the present invention will be described with reference to illustrated embodiments.

In Figures 1 and 2, (1) and (2) are a pair of bottomed cylindrical casings, with their openings facing each other, so that (1) is inward and (2) is outward. Both are fitted so that they are positioned on the same side. Approximately at the center of the side plates (5) and (7) of this casing (1) and (2), there is an inward bulge αυαQ.
is formed, and a circular hole is provided in the center of the bulge, and the circumferential edges α and αq of the circular hole protrude diagonally outward. Bearings (6) and (8) having a substantially spherical cross section are held by a bulge α and an auxiliary support member αη. Also, (9
) is a relatively narrow rotor made of a laminated core,
The rotation axis αQ is rotatably supported by bearings (6) and (8). (4) is a stator having a coil (3) arranged around the outer periphery of the rotor (9);
) is firmly fitted to the inner surface of the inner casing (1). This stator (4) is composed of a laminated core having approximately the same width as the laminated core of the rotor (9), and the electric motor having the stator (4) and rotor (9) has a relatively small output capacity. be. In addition, on the outside in the axial direction of the bearings (6) and (8), a mounting member Q3α→ having a groove portion Qυ (to) is attached to a fixing member Q (J (e) It is firmly fixed.

Therefore, the rotors shown in Fig. 2 with different output capacities (
9y and stator (4γ), these can be installed in place of the rotor (9) and stator (4) in Fig. 1. That is, the casing (1) (2) and the bearing (
6) Without changing (8), motors with different output capacities can be assembled by providing a rotor (9y) and a stator (4)' having a relatively wide laminated core at predetermined positions.

In this way, the present invention provides casings (1) (2) for rotors (9y) and stators (4γ) with different output capacities.
Efforts are being made to standardize parts such as bearings (6) and (8).

Therefore, in the embodiment shown in FIGS. 1 and 2, flanges (1a) and (2a) are further provided diagonally outwardly at each opening of the casing (1) and (2), and the casing is In the middle of (1), the ring embankment (1b) is
The outer diameter of the casing (1) is the same as that of a).
) and the other casing (2) that overlaps and fits thereon can be smoothly fitted, and the effects described below can be achieved.

Next, in the embodiment shown in FIG.
) in place of the circular embankment (1b), protrusions (positive) are provided scattered in the circumferential direction, and have substantially the same effect as the previous embodiment.

As described above, according to the present invention, it has a bottomed cylindrical casing (1) (2) with double inner and outer sides, and a stator (4).
The inner casing (1
) into the inner surface of the casing (1).
Bearings (6) (8) are provided on the side plates (5) (7) of (2), and the rotating shaft 01 of the rotor (9) is rotatably mounted on these bearings. ) and bearings (6), (8), etc., as well as rotors (9) and stators (4) with different output capacities can be freely mass-produced. It is possible to save labor through mass production of each product, and it is also useful from the standpoint of quality control, and moreover, it can be provided at a low cost.

Further, by providing a protrusion such as a ring embankment (1b) or a protrusion (lb) on the inner casing (1), the following effects are obtained. That is, when the casing according to the present invention is formed by press working, the inner surface of the casing is formed into a shape that corresponds to the punch of the press, so that precision can be achieved in this inner surface.

However, in the case of deep drawing, as a result of drawing, the thickness of the iron plate material becomes uneven (1.3 times in thick places, 0.7 times in thin places), so precision is required on the inner surface of the casing. If you ask for it, the accuracy on the outside will not come out. When such a casing is used as an inner casing and another casing is fitted on the outside thereof, the axes of the inner and outer casings become eccentric with respect to each other. Therefore, bearings (6) and (8) are arranged at the axes of the inner and outer casings.
) The rotating shaft α1, which is supported at both ends, is inclined, and when the rotor (4) provided on this rotating shaft 00 rotates, it can come into contact with the stator (4) arranged on the inner surface of the inner casing (1). This prevents smooth rotation.

However, in this invention, the inner surface of the inner casing can be punched with precision, and the stator can be precisely fitted so that its axis coincides with the axis of the inner casing, and the outer periphery of the stator can be punched with precision. A protrusion (lb.) regulated and molded by a mold.

lb'), accuracy can be achieved even on the outer periphery of the inner casing (1), regardless of the uneven thickness of the material.

Therefore, if the other casing (2) is fitted outwardly onto this inner casing (1), both casings (1) and (
2) The axes of both casings (1) and
The rotating shaft 01 supported by bearings (6) and (8) located at the axis of (2) does not tilt with respect to the axis of the stator (4, 4'), ensuring smooth rotation. .

As described above, in the present invention, by providing the protrusion on the outer periphery of the inner cage ring (1), accuracy on the outer periphery side can be achieved, and as a result, smooth rotation of the rotor relative to the stator is possible.

[Brief explanation of drawings]

FIG. 1 is a vertical cross-sectional view of a motor with a small output capacity according to the present invention, FIG. 2 is a vertical cross-sectional view of a motor with a large output capacity according to the present invention, and FIG. 3 is a cross-sectional view showing another embodiment. be. (1) (2)...Casing, (lb), (11)
')... Protrusion, (3)... Carp/L/, (4)...
- Stator, (6) (8)... Bearing, (9)... Rotor, 00... Rotating shaft. Patent applicant: Shibaura Seisakusho Co., Ltd. UiJ surface clean♂ (no change in content) Figure 1 Figure 3 Procedural amendment (Director of the Japan Patent Office Kazuo Wakasugi 1, case indication 1982 Patent application No. 124017) No. 2, Relationship with the case of the person amending the name of the invention electric motor 1 Patent applicant representative Ryo Watanabe 4, agent

Claims (1)

[Claims] A pair of bottomed cylindrical casings (1) and (2) are fitted so that their openings face each other and one (1) is located inward and the other (2) is located outward, and both casings are fitted. (1) (2)
Protrusions (1'b) (lb) are arranged or scattered in the circumferential direction on the outer periphery of the inner casing (1) at the fitting and overlapping part of the inner casing (1),
The stator (4) is fitted onto the inner surface of the inner casing (1), and the bearing (6) ('
8), and a rotating shaft Q0 of a rotor (4) is supported by bearings (6) and (8).