JPS63287351A - Motor - Google Patents

Abstract

PURPOSE:To prevent a field coil from being damaged due to foreign matters, by setting a spacer between the field coil and a rotor, and by covering the surface of the field coil. CONSTITUTION:Between a field coil 24 and a rotor 30, a sheet-formed spacer 31 is set, and the section of the sheet confronted with the surface of the field coil 24 generating effective magnetic flux is made thinner than the other section of the sheet. When air flows into a fan case 21 along with the rotation of an impeller 27, then foreign matters included in air are also sucked in the same manner, and the partial foreign matters enter a motor 20 through a void section 33 between the rotor 30 and a housing 22. However, a space between the field coil 24 and the rotor 30 is covered with the sheet-formed spacer 31, and so the field coil 24 is prevented from being damaged due to attached foreign matters.

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Application The present invention relates to a blower drive motor used in air conditioning equipment and the like.

BACKGROUND OF THE INVENTION As shown in FIG. 3, this type of motor has a stator 5, which is comprised of a field coil 3□ on a flat substrate 2, a field coil 3□, and a bearing 4 provided in the center, as shown in FIG. A rotor 8 consisting of magnets 6 placed opposite to each other and a rotating shaft 7 placed in the center.
The rotary shaft 7 is inserted into the bearing 4 to connect the stator 5 and the rotor 8.゛Problems to be Solved by the Invention However, in the above configuration, since a gap 9 is formed between the housing 1 and the rotor 8 that communicates with the external environment, foreign matter may enter from the outside and damage the field coil 3. There were problems such as leading to

The present invention solves these conventional problems, and aims to prevent damage to the field coil and suppress a decrease in magnetic force.

Means for Solving the Problems In order to solve the above problems, the motor of the present invention includes a plurality of field coils stacked on a flat substrate, a stator consisting of a bearing provided in the center, and a fixed It consists of a rotor consisting of a permanent magnet placed facing the child and a rotating shaft provided at the center of the rotor, and the rotating shaft is inserted into the bearing to couple the stator and rotor, and the field A thin plate-shaped spacer is placed between the magnetic coil and the rotor.

Operation The present invention provides the spacer between the field coil and the rotor to cover the surface of the field coil even if foreign matter enters the housing from the outside due to the above-mentioned t- and f configurations.
Damage to the field coil etc. due to foreign objects is completely prevented.

Embodiments Hereinafter, embodiments of the present invention will be described based on the accompanying drawings. FIG. 1 shows an example of a blower in which a motor 20 is provided within a housing 22 that constitutes a part of a fan case 21. As shown in FIG. The motor 2o includes a stator 26 consisting of a plurality of field coils 24 stacked on a flat substrate 23 and a bearing 25 provided at the center, and a permanent magnet placed on the lower surface of the impeller 2 facing the stator 26. 28 and a rotor 30 consisting of a rotating shaft 29 provided at the center thereof, and the rotating shaft 29 is inserted into the bearing 25 to couple the stator 26 and the rotor 30. A thin plate-shaped spacer 31 is provided between the field coil 24 and the rotor 30, and the thickness of the spacer facing the field coil 24 surface that generates effective magnetic flux is thinner than other parts. It's on. Further, in FIG. 2, a slit-shaped opening 32 is provided in the spacer 31 at the opposing location.

In the above configuration, air flows through the fan case 21 due to the rotation of the impeller 27, but foreign matter contained in the air is also sucked in, and some of the foreign matter is absorbed into the motor through the gap 33 between the rotor 3° and the housing 22. Enter within 20. However, a thin plate-shaped spacer 31 is provided between the field coil 24 and the rotor 30.
Since the field coil 24 is covered with
Decrease in magnetic force can also be suppressed by reducing the thickness of the spacer 31 in the portion facing the 4th surface or by completely removing it to provide an opening 32.

Effects of the Invention As described above, the motor of the present invention provides the following effects.

(1) By covering the outer surface of the field coil with a spacer, it is possible to prevent damage to the field coil that may occur when foreign matter adheres.

(2) By making the thickness of the spacer on the surface of the field coil that generates effective magnetic flux thinner than in other parts, or by providing an opening, it is possible to suppress a decrease in magnetic force due to the field coil.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a blower using a motor according to an embodiment of the present invention, Fig. 2 is a sectional view of a blower using a motor according to an embodiment of the present invention, and Fig. 3 is a sectional view of a conventional motor. be. 23... Board, 24... Field coil,
25...Bearing, 20...Stator, 28
...Permanent magnet, 29 ... Rotating shaft, 30
...Rotor, 31...Spacer, 32
······Aperture. Name of agent: Patent attorney Toshi Nakao (1 person)
... Certain plate ρ・One rotation axis Ku・−Fj3＆chi Figure 1 31"゛Spete Figure 2

Claims (3)

[Claims] (1) A stator consisting of multiple field coils stacked on a flat board, a bearing in the center, a permanent magnet placed opposite the stator, and a rotating shaft in the center. a rotor, the rotating shaft is inserted into the bearing to couple the stator and the rotor, and a thin plate spacer is arranged between the field coil and the rotor. . (2) The motor according to claim 1, wherein the spacer plate thickness is thinner in a portion facing the field coil surface that generates effective magnetic flux than in other portions. (3) The motor according to claim 1 or 2, wherein a slit-shaped opening is provided in the spacer in a portion facing the field coil surface that generates effective magnetic flux.