JPS622934Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a flat electric device that can be used as an electric fan for cooling a radiator of a vehicle.

The present invention provides a flat electric device that drives a rotary load with a flat electric motor that can quickly dissipate the heat generated in the armature plate to the outside of the electric device, thereby achieving a small size and high output. The purpose is to

An embodiment of the device of the present invention will be described below.

In the drawing, 1 is a flat motor, in particular a print motor. 2 is a load, especially an axial fan, which blows air to the radiator. 3 is a rotor center member made of aluminum or the like.

4 is the center piece of the axial flow fan, which is a rotating load made of metal such as aluminum that has good heat dissipation properties. Center piece 4 that becomes this rotational load
is insert molded into the synthetic resin fan 2.

Reference numeral 5 denotes a housing of the flat electric motor 1, and a mounting leg 6 is welded to one side of the housing. Reference numeral 7 designates a field portion, particularly a magnet, which is fixed to the inner surface of the housing 5 with adhesive or the like. As shown in the figure, this magnet faces the armature plate 8 with a small gap therebetween. Reference numeral 8 denotes a disc-shaped armature plate fixed on the rotor center member 3 and extending perpendicularly to the shaft 9, and a copper plate forming an armature coil is provided in a cross-shaped manner.

9 is a shaft that becomes a cantilever shaft, and has a stepped portion 9a.
The stepped portion 9a is firmly fixed to the inner peripheral portion of the burring 5a of the housing 5 by press fitting or the like. A brush 10 is fixed to the housing 5 via an insulator 10a, and is slidably inserted into a metal brush holder 10b and urged by a spring 10c so as to come into contact with the surface of the armature plate 8. Therefore, as the armature plate 8 rotates, the brush 10 slides on its contact surface.

The armature plate 8 is a well-known disc-shaped plate having an armature coil formed by punching out at least a pair of copper plates using a press, pasting them together, and inserting an insulating plate between them. This armature plate 8 includes shaft insulating parts 11, 1 made of a mica plate or a glass cloth epoxy plate.
2 to the rotor center member 3 through the ring 13
has been fixed using .

The armature plate 8, the rotor center member 3, the shaft insulating parts 11 and 12, and the ring 13 also constitute the rotor 19.

A bearing 14 is provided between the shaft 9 and the rotor center member 3 so that the rotor 19 can rotate smoothly on the shaft 9. 15 is a circlip for fixing the bearing, and 16 is the other side of the housing which serves both as a magnetic circuit and a case. The inner diameter portion 16a of the housing 16 has a bent portion along the axis 9, and as shown in the figure, the inner diameter portion 16a has a portion bent along the axis 9.
A collar member 17 is press-fitted and fixed. The outermost circumferential portion of the housing 16 is fitted into and fixed to a spigot portion 5a provided on the outer circumferential end opening side of the housing 5. Note that the figure does not show that the center piece 4 side of the rotation center member 3 is fixed to the center piece 4 with screws or the like in a state that protrudes from the tip of the inner diameter portion 16a of the collar member 17 or the housing 16. However, this is because it facilitates assembly and fixation with the center piece 4, and there is no need for it to be particularly protruding as described above. Next, the flange member 17 having a radially protruding flange prevents the water entering from the gap 2a of the fan 2 as shown by the arrow from flowing in the direction of the rotor center member 3 and flowing out from the direction of the arrow. It plays the role of a labyrinth seal. Reference numeral 18 denotes a screw for connecting and fixing the rotor center member 3 to the center piece 4, which serves as a rotational load and is made of a metal with good thermal conductivity.

The operation in the above configuration will be explained.

When the armature coil of the armature plate 8 is energized through the brush 10, the rotor 19 rotates on the shaft 9, and the center piece 4 also rotates at the same time.
Therefore, the fan 2 rotates, and cooling air is sent to a radiator (not shown).

The heat of the armature plate 8 is
2 to the rotor center member 3, and is radiated to the outside air from the center piece 4, which serves as a metallic rotational load. Therefore, the heat generated in the armature plate 8 is not dissipated through the shaft 9, which has a small cross-sectional area and low heat capacity, but rather through the rotor center, which is made of aluminum or the like with excellent thermal conductivity, as described above. Since it is dissipated into the outside air from the member 3 and center piece 4, it is possible to significantly lower the temperature of the armature plate 8, and in the experimental example, the temperature of the armature plate 8 can be reduced to 120
[W] The input motor had a 10℃ reduction effect.

Note that the rotating load does not need to be a fan, but may be anything that can be connected to the rotor center member 3 with screws or the like and has good thermal conductivity itself.

As mentioned above, in this invention, the heat of the armature plate can be dissipated well, so if the allowable temperature rise value is kept constant, the flat motor can be made smaller and the overall size and weight can be reduced. In addition, there is an effect that a flat electric device with high output can be provided.

Although the rotor center member 3 and the center piece 4 of the fan serving as the rotational load have been described as being made of metal materials such as aluminum, they are not limited to this, and may be made of any material that has good thermal conductivity and heat dissipation.

[Brief explanation of the drawing]

The drawing is a longitudinal sectional view showing one embodiment of the device of the present invention. 5, 16...Housing, 9...Shaft, 14...
Bearing, 3... Rotor center member, 8... Armature plate, 7... Field section, 4... Rotating load, 1... Flat electric motor.

Claims (1)

[Claims for Utility Model Registration] First and second housings 5, 16 facing each other and forming a motor chamber therebetween; and a shaft having one end fixed to the first housing 5 and extending inside the motor chamber. 9, a bearing 14 provided on the shaft 9, a rotor center member 3 made of a material with good thermal conductivity and rotatably attached to the shaft 9 via the first bearing 14, and the rotor center. fixed to the member 3 and the shaft 9
a flat armature plate 8 extending at right angles to the armature plate 8; a brush 10 attached to the first housing 5 side and having one end in contact with the surface of the armature plate 8; a flat electric motor 1 comprising a field part 7 which is attached to the first housing 5 so as to face each other with a small gap therebetween and forms a magnetic circuit with the first and second housings;
and a rotating load 4 made of a material with good thermal conductivity, which is provided outside the second housing 16 and whose side surface is connected to the rotor center member 3 of the flat electric motor 1 so that the heat of the armature plate 8 can be easily transmitted. A flat electric device characterized by: