JP2007082362A - Rotating electric machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a totally enclosed motor capable of facilitating the installation of a terminal box for supplying electric power in an arbitrary direction of the outer periphery of a housing and capable of improving heat dissipation. <P>SOLUTION: A foot for mounting on the housing body and non-power transmission side is made into individual structures and external radiating fins of the housing are enclosed with a cylindrical cover for fixing. This enables to perform mounting so that a relative position of a terminal box installed on the housing to the foot to be mounted later may be in an arbitrary direction of a rotational axis. This electric machine is also provided with means for efficiently applying the wind of a cooling fan to the radiating fins in the cylindrical cover by a tight clearance between the fan cover and the cylindrical cover. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a technique for providing a rotating electrical machine or a motor.

  For example, there is one disclosed in Patent Document 1 as a fully-closed electric motor. Patent Document 1 describes a fully-closed electric motor with a cooling rib having a simple structure and high cooling efficiency without using special equipment or members.

JP 2001-238395 A

  In general, in order to dissipate the heat generated from windings, etc., a fully-closed rotating electrical machine and motor with radiation fins attached to the outer surface of the housing is a foot for fixing the rotating electrical machine and motor to the power transmission side. When attaching to the housing body, it is common to set a part without fins for heat dissipation in advance, and to connect a foot to this part or to make an integrated structure. The heat dissipating fins are exposed to the outside air, and the cooling fan attached to the shaft end of the shaft is cooled by directing the air toward the heat dissipating fins with the fan cover.

  However, since the legs can be attached only to the portions without the radiation fins, the relative positions of the terminal boxes having the terminals to which the power supply lines for supplying the power input to the legs and the windings are fixed are inevitably determined. Design. Therefore, whenever the relative position of the terminal box and the foot is changed, the shape of the housing must be redesigned, and the relative position of the terminal box and the portion without the radiating fin must be changed. There is a problem that there are many types.

  In addition, the wind of the cooling fan escapes to the atmosphere, and the wind that does not hit the heat radiating fins is also generated, resulting in a loss in terms of cooling efficiency.

  The rotating electric machine and motor of the present invention can fix the legs on the outside of the cylindrical cover by covering the outside of the heat radiating fin of the housing with a cylindrical cover and also fixing between the radiating fin and the cylindrical cover. become.

  In addition, a wind passage for blowing the cooling fan wind to the heat radiating fins between the housing and the cylindrical cover is secured, and a fan cover attached outside the cooling fan and a cylindrical cover outside the heat radiating fins. By closely contacting the gap, the wind can be sent into the cylindrical cover without diverging the wind of the cooling fan to the outside.

  Further, the configuration of the present invention will be described below from another viewpoint.

  A stator having windings attached to the inner surface of the housing, a rotor core inserted into the stator, a shaft fixed to the rotor core, a bearing supporting the shaft, and an end bracket supporting the bearing; In a rotating electrical machine having a cooling fan attached to the shaft, a terminal box having a terminal to which a power supply line for supplying power input to the winding is fixed is fixed at an arbitrary position on the outer surface of the housing. In addition, the leg for fixing the rotating electrical machine is fixed at an arbitrary position on the outer surface of the housing.

  In the rotating electrical machine, a heat radiating fin is provided between the housing and the stator.

  By taking the above measures, the foot can be fixed at any position on the outer periphery of the cylindrical cover, so the relative position between the foot and the terminal cover can also be determined arbitrarily, greatly reducing the type of housing. The cooling efficiency can be improved and the cooling fan wind can be efficiently applied to the radiating fins.

  Embodiments of the best mode for carrying out the present invention will be described below with reference to the drawings.

  FIG. 1 is an assembled perspective view of an embodiment of a fully closed motor with a radiating fin outer peripheral cylindrical cover, and FIG. 2 is an exploded perspective view thereof.

  In the case of FIG. 1, FIG. 2, the case where the relative position of the leg | foot 3 with respect to the terminal box 13 is on the upper side is represented. The housing 2 has a cylindrical outer shape, and has a structure in which a wind passage partitioned by a heat radiation fin passes through the cylindrical inner surface.

  Further, the end portion of the conducting wire of the winding 5 wound around the stator 4 is extended from the rear upper part of the housing 2 to the outside, and the terminal box 13 is screwed to this portion through the packing 15 to fix the terminal box 13. Fix it.

  A rotor core 8 fixed in advance to the shaft 7 is inserted into an inner diameter portion of the stator 4 together with a bearing (hereinafter referred to as a bearing) 6 and fixed by an end bracket 9, thereby sealing the entire inside of the housing 2. This state is called a so-called fully closed motor.

  The cooling fan 11 is fixed to the shaft end of the shaft 7, and the fan cover 12 attached to the outside is fixed to the end of the housing 2 without a gap. The flat part of the fan cover 12 has a hole for sucking air. The air is sucked by the cooling fan 11 from here, and further passes through the wind path of the housing 2 to remove heat from the heat radiating fin. In this structure, the housing 2 is cooled by discharging heated air from the hole.

  The foot 3 is screwed to the opposite side of the terminal box 13 attached to the housing 2. By doing in this way, the relative position of the terminal box 13 with respect to the foot | leg 3 can be set to the upper side. In addition, since the foot 3 can be fixed by making a screw hole at an arbitrary position in the rotation direction of the cylindrical housing 2 at the position of the terminal box 13, the foot of the terminal box 13 can be fixed. 3 can be arbitrarily set.

  FIG. 3 is a plan view of the motor of this embodiment as viewed from the power transmission side, and is an example in which the position of the terminal box is freely set. The terminal box 21 is fixed to the upper portion of the foot 24, the terminal box 22 is fixed to the right side of the foot 25, the terminal box 27 is fixed to the lower side of the foot 26, and the foot 28 is fixed. FIG. 5 is an explanatory diagram that shows that it is possible to fix the terminal box 23 on the left side and fix it at an arbitrary position.

  In addition to these four cases, the terminal box can be attached in any direction in the rotation axis direction by changing the screwing position of the foot.

  FIG. 4 shows a cross-sectional view of the motor of FIG. 1 taken along a cross section. 4 sucks air from the hole formed in the flat portion of the fan cover 12 in the case of FIG. 1 by the cooling fan 11, and removes heat from the radiating fin through the air passage of the housing 2. It is the figure which explained clearly the state which cools the housing 2 by discharging | emitting the air heated from. The air sucked from the air 29 and 30 is discharged from the holes of the air 31 and 32 through the holes inside the housing.

  FIG. 5 shows another embodiment.

  The shaft is a hollow shaft, the air 33 is sucked from the shaft hole on the power transmission side by the suction force of the cooling fan, and while taking the heat of the shaft and the rotor core, once out to the cooling fan side and further through the wind passage of the housing, In this embodiment, the air inside the motor and the housing are cooled at the same time by discharging the heated air from the hole on the opposite side while taking heat away from the radiation fins.

  4 and FIG. 5, a structure that cools the housing 2 by discharging the heated air from the hole on the opposite side while the wind of the cooling fan takes heat from the heat radiation fins through the wind passage of the housing 2. Therefore, it is also possible to expect the effect that the noise of the wind noise of the cooling fan can be suppressed at the same time.

  In addition, as described above, it is possible to avoid the provision of the housing type according to the model in which the attachment position of the terminal box is changed as in the prior art. Accordingly, it is not necessary to provide a large number of housing molds, and it is expected that productivity as a product and improvement in production efficiency can be obtained. The outer peripheral shape of the cross section of the housing may be a regular polygon such as a square, or a polygon.

  In the above description, the fully-closed motor is described as an example. However, the present invention is not limited to this fully-closed motor, and may be implemented by a general rotating electric machine.

FIG. 1 is an assembled perspective view of an embodiment of a fully-closed motor with a radiating fin outer peripheral cylindrical cover. FIG. 2 is an exploded perspective view of an embodiment of a fully closed motor with a radiating fin outer peripheral cylindrical cover. FIG. 3 is a plan view of an embodiment of a fully-closed motor with a radiating fin outer peripheral cylindrical cover as viewed from the power transmission side. FIG. 4 is a cross-sectional view of an embodiment of a fully-closed motor with a radiating fin outer peripheral cylindrical cover taken along a cross section. FIG. 5 shows another embodiment of a fully closed motor with a radiating fin outer peripheral cylindrical cover.

Explanation of symbols

13-terminal box, 3-foot, 2-housing, 4-stator, 5-winding, 7-shaft, 8-rotor core, 6-bearing, 9-end bracket, 11-cooling fan, 12-fan cover

Claims (3)

A stator having windings attached to the inner surface of the housing;
A rotor core inserted into the stator;
A shaft fixed to the rotor core, and a bearing supporting the shaft;
An end bracket for supporting the bearing;
A cooling fan attached to the shaft;
In a rotating electrical machine having
Fixing a terminal box having a terminal to which a power supply line for supplying power input to the winding is fixed at an arbitrary position on the outer surface of the housing;
The rotating electric machine is characterized in that a foot for fixing the rotating electric machine is fixed at an arbitrary position on the outer surface of the housing. The rotating electrical machine according to claim 1, wherein
A rotating electrical machine, wherein a radiation fin is provided between the housing and the stator. The rotating electrical machine according to claim 1, wherein
A rotating electrical machine characterized in that an outer peripheral shape of a cross section of the housing is a polygon.

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