JPS62166747A - Commutator motor - Google Patents

Abstract

PURPOSE:To improve the air efficiency and cooling efficiency by providing multiple convexes axially, which constitute the vibration flue, along the outside circumference of a bracket. CONSTITUTION:Multiple convexes 8 are provided axially on the outside circumference of a bracket 5b which project outwards. A ventilation flue 7 is formed by this convex 8 and a stator 1. When the suction air is sucked into the inside of a commutator motor through a louvre 6a of a bracket 5A, it passes through the air gap between the stator 1 and a rotor 2 as well as through the ventilation flue 7 between the stator 1 and a bracket 5b and exhausted from a louvre 6b of the bracket 5b. In this way, by providing multiple convexes on the outside circumference of the bracket 5b, the ventilating cross section is so extended that the air efficiency and cooling efficiency can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a commutator motor used in vacuum cleaners and the like.

Conventional Techniques 6i Te Traditionally, compact and highly efficient commutator motors for vacuum cleaners and the like have been important.

The conventional commutator motor as described above will be described below with reference to the drawings.

FIG. 4 shows a conventional commutator motor.

Further, FIG. 5 shows a perspective view of a bracket of a conventional commutator motor. Furthermore, FIG. 6 shows an example view when viewed from the axial direction in FIG. 5. In FIGS. 4, 5, and 6, reference numeral 1 denotes a stator consisting of a laminated iron core and windings, and is fixed to the inner surface of a bracket 5b, which will be described later. 2 is a rotor consisting of a laminated iron core, a shaft, windings, and a commutator. 3 is a bearing for supporting the rotor 2, and 4 is a brush holder device for flowing current to the rotor 2.

Reference numeral 5 denotes a bracket, which holds the above-mentioned components. Here, among the brackets 5, the bracket 5a on the output shaft side is referred to as bracket A, and the bracket 5b on the non-output side is referred to as bracket B7. 6a and 6b are brackets 5a, respectively.
・There are multiple air holes in 5b.

The operation of the commutator motor configured as described above will be described below.

First, the rotor 2 is rotated by passing a current through the commutator motor. When the rotor 2 rotates, a rotary fan attached to the shaft (not shown in Fig. 4) rotates, and the suction air is passed through the air hole 6a provided in the axial end face of the bracket A5a to the commutator. Send it inside the electric motor. The suction air sent into the commutator motor is connected to stator 1 and rotor 2.
air gap between stator 1 and bracket B5
The air passes through the air passage 7 between B5b and is discharged from the air hole 6b of the bracket B5b.

Problems to be Solved by the Invention However, with the above configuration, the cross-sectional area of the ventilation passage is narrow (limited), making it difficult for the intake air to flow smoothly, resulting in a decrease in air efficiency and insufficient cooling effect. It also had the disadvantage of being difficult to obtain.

In view of the above drawbacks, the present invention provides a commutator motor with high air efficiency and high cooling effect.

Means for Solving the Problems In order to achieve this object, the commutator motor of the present invention is such that a plurality of convex portions constituting ventilation passages are provided on the outer peripheral portion of the bracket B in the axial direction.

Function: With this configuration, the ventilation cross-sectional area is expanded, and the intake air flows smoothly, thereby increasing the air efficiency.In addition, the cooling effect is also enhanced by increasing the air volume.

EXAMPLE An example of the present invention will be described below with reference to the drawings.

FIG. 1 shows a commutator motor in an embodiment of the present invention. Moreover, FIG. 2 is a perspective view of the bracket of the commutator motor of the present invention. Furthermore, FIG. 3 shows a side view of FIG. 2 when viewed from the axial direction. In Fig. 1, Fig. 2, and Fig. 3, 1 is a stator, 2 is a rotor, 3 is a bearing, 4 is a brush retainer device, and 5a is a bracket A, and the above structure is the same as that in Fig. 4. It is something. 5
Reference numeral b designates a bracket B, which has a plurality of convex portions 8 projecting outward in the axial direction on its outer circumferential portion, and a ventilation passage 7 is formed between the convex portions 8 and the stator 1 . Further, 6a and 6b are air holes, which have the same structure as that shown in FIG. 4.

The operation of the commutator motor configured as described above will be explained below.

First, similar to the commutator motor shown in FIG. 4, suction air is sent into the commutator motor through the air hole 6a of the bracket A5a. The suction air sent into the commutator motor is
It passes through the air gap between the stator 1 and the rotor 2 and the ventilation path 7 between the stator 1 and the bracket B5b, and is discharged from the air hole 6b of the bracket B5b.

As described above, according to this embodiment, by providing a plurality of convex portions 8 on the outer circumferential portion of the bracket B5b, the ventilation cross-sectional area is expanded, and the air efficiency and cooling effect can be enhanced. Furthermore, by increasing the ventilation cross-sectional area between the stator 1 and the bracket B5b, the amount of air flowing through the air gap between the stator 1 and the rotor 2 is reduced, and the wind noise caused by the rotor 2 is reduced. I can do it. Based on this example, 500
As a result of a study on a commutator motor for a W-class vacuum cleaner, it was found that by providing the convex portion 8, efficiency could be improved compared to conventional products.

In this embodiment, the shape of the convex portion 8 is semicircular, but it goes without saying that the shape of the convex portion 8 may be rectangular or protruding.

Effects of the Invention As described above, the present invention provides high air efficiency and rectification with high cooling effect by providing a plurality of convex portions constituting ventilation passages in the axial direction on the outer periphery of a bracket that has a stator inside. It can be used as a sub-electric motor, and its practical effects are great.

[Brief explanation of drawings]

FIG. 1 is a partially sectional front view of a commutator motor according to an embodiment of the present invention, FIG. 2 is a perspective view of bracket B, FIG. 3 is a side view of the same, and FIG. 4 is a part of a conventional commutator motor. 5 is a perspective view of the conventional bracket B, and FIG. 6 is a side view of the same. l... Stator, 5... Bracket, 7
...Ventilation passage, 8...Protrusion. Name of agent: Patent attorney Toshio Nakao Haka1 person 5a ---
Figure 4 Figure 5 b Figure 6 b

Claims (1)

[Claims] A plurality of protrusions projecting outward are provided in the axial direction on the outer periphery of a bracket having a stator made of laminated silicon steel plates inside, and a ventilation passage is formed between the protrusions and the stator. Commutator motor.