JPH0688164U - Automotive motor cooling structure - Google Patents

Abstract

(57) [Summary] [Purpose] The object of the present invention is to provide a motor for an automobile.
An object of the present invention is to provide a motor cooling and water draining structure with a small number of assembly steps without increasing the number of parts. [Configuration] In this example, a vent hole (cooling hole) 19 is provided on the side surface of the housing 17. Further, the end frame 18 of this example is formed of synthetic resin, and a plurality of shielding pins 20 are integrally formed on the end frame 18 so as to extend to the inside of the motor. As shown in FIG. 2, the shielding pin 20 is composed of a large-diameter pin 21 and a small-diameter pin 22, and the small-diameter pin 22 is formed so as to surround the large-diameter pin 21 on all sides. There is.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an electric fan motor for an automobile, and more particularly to a cooling structure for the electric fan motor for an automobile.

[0002]

[Prior art and its problems]

 Generally, in an automobile motor, for example, an electric fan motor, outside air is introduced into the motor to cool the motor as the motor becomes smaller, and a cooling hole is provided in the housing of the motor to cool the outside air. It was being introduced internally. In addition, a vent hole is formed in the yoke of the motor to allow the air inside and outside the motor to flow in order to reduce the pressure difference between the inside and outside of the yoke and to discharge the water droplets caused by the dew condensation generated inside the motor.

However, in an electric fan motor for an automobile, water, dust, and the like that enter the engine room in order to be installed in the engine room of the automobile enter the cooling holes formed in the housing of the motor, and Water, dust, etc. adhere to the commutator and the brush section, which causes inconvenience.

In order to prevent this, a technique has been proposed in which a shielding plate is provided in the cooling hole portion so that water, dust and the like do not adhere to the commutator and the brush portion. For example, a proposed technique using a damper that opens at a predetermined temperature with a shape memory alloy (see Japanese Utility Model Laid-Open No. 62-54559), a technique using a blower tube (see Japanese Utility Model Laid-Open No. 63-74059), and multiple methods for housing A tail cover with a striped through portion formed so as not to coincide with this through hole (see Japanese Utility Model Laid-Open No. 64-40258), provided on the housing. There are known a technique of mounting a pipe in the hole (Japanese Utility Model Publication No. 57-31648) and a technique of using a dustproof cover (Japanese Utility Model Publication No. 56-52461).

However, in any of the above-mentioned proposed techniques, there is a problem that the number of assembling steps and the number of parts are increased. In particular, when using a separate pipe, the pipe protrudes downwards from the motor, so it is necessary to take measures such as interference prevention for the mating attachment as well. There was also the inconvenience of not being discharged.

An object of the present invention is to provide a cooling and draining structure for a motor for an automobile, which does not increase the number of parts and requires a small number of assembly steps.

[0007]

[Means for Solving the Problems]

 The cooling structure for an automobile motor according to claim 1 of the present invention is an automobile motor having a housing provided with a vent hole, and a plurality of end frames are integrated with the end frame so as to cover the vent hole with a gap therebetween. It is characterized in that the shielding pin extends from the end frame and is arranged.

According to a second aspect of the present invention, there is provided an automobile motor cooling structure in which a housing has a vent hole, which is integrated with an end frame so as to cover the vent hole with a gap from the vent hole. It is characterized in that it is formed with a protruding surface. In addition, it is preferable that the shield pin and the protruding surface integrated with the end frame are formed in a maze structure.

[0009]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. The parts, arrangements, etc. described below do not limit the present invention and can be variously modified within the scope of the present invention. 1 and 2 show a first embodiment of the present invention. FIG. 1 is a cross-sectional explanatory view of an essential part, and FIG. 2 is a cross-sectional view taken along the line AA of FIG.

In FIG. 1, a motor M includes a stator (not shown in FIG. 1), an armature 12 having a winding 12 a, a rotating shaft 13 of the armature 12, and a bearing portion that supports the rotating shaft 13. 14, a commutator 15 disposed on one end side of the rotating shaft 13, and a brush device 16 that is in sliding contact with the commutator 15. These configurations themselves are known techniques, and the details thereof will be omitted.

Reference numeral 17 is a housing, and reference numeral 18 is an end frame. In this example, a vent hole (cooling hole) 19 is provided on the side surface of the housing 17. Further, the end frame 18 of this example is molded of synthetic resin, and a plurality of shielding pins 20 are integrally formed on the end frame 18 so as to extend to the inside of the motor.

As shown in FIG. 2, the shield pin 20 of this example is formed of a large diameter pin 21 and a small diameter pin 22, and the small diameter pin 22 is formed by the large diameter pin 21. It is formed so as to surround all four sides.

A shield plate 23 is integrally formed on both sides of the shield pin 20. As shown in FIG. 2, the shielding plate 23 of the present example is provided with a concavo-convex portion 23a on the shielding pin 21 side so as to reduce the gap between the shielding plate 21 and the shielding pin 21.

The shielding pin 20 and the shielding plate 23 are formed so that the commutator 15 side and the brush device 16 side are not exposed directly from the vent hole 19 so as to be in a maze when viewed from the vent hole side.

Since it is formed as described above, water and dust that enter from the vent hole 19 travel in a straight line, so that they collide with a plurality of shield pins 20 and are obstructed by the shield pins 20 and the shield plate 23. In addition, it is possible to prevent the entry of the commutator 15 and the brush device 16 from being blocked, and since the shield pin 20 and the shield plate 23 are integrally formed with the end frame 18, the number of parts is not increased. .

Further, by disposing the vent hole 19 on the lower side when the motor is installed, a gap is provided between the housing 17 and the shielding pin 20, so that water and dust once entering the motor M can be prevented. It can be discharged to the outside of the motor through the vent hole 19 without accumulating inside the M, and it can function as a water drainage port. Further, since the maze structure is provided inside the motor M, it is possible to prevent the protrusion to the outside of the motor as in the prior art in which a pipe or the like is attached, and it is possible to prevent interference with other parts. Also, since there is no pipe mounting part, the water inside the motor can be completely discharged to the outside.

3 to 5 show a second embodiment of the present invention. FIG. 3 is a sectional view, FIG. 4 is an enlarged partial sectional view, and FIG. 5 is an enlarged partial sectional view. In this example, the same members and the like as those in the above example are designated by the same reference numerals, and the description thereof will be omitted.

In the above-described embodiment, the example in which the shielding pin 20 is formed to extend from the end frame 18 to the inside of the motor has been shown, but in the present embodiment, the arc-shaped waterproof wall 25 is provided from the end frame 24 to the inside of the motor. And is formed so as to cover the vent hole 19 with the arc-shaped waterproof wall 25. Even if it is formed as in this example, it is possible to obtain the same operational effects as those in the above-mentioned example.

FIG. 6 is a sectional view showing a third embodiment of the present invention. In each of the above-described embodiments, the example in which the ventilation hole (cooling hole) 19 is provided on the side surface of the housing 17 is shown, but in this example, the ventilation hole 27 is provided in the end frame 26. That is, as shown in FIG. 6, an inner side wall 28 is formed from the end frame 26 to the motor M side at the place where the vent hole 27 is formed, and a gap is formed between the lower side of the inner side wall 28 and the housing 17. . By forming in this way, the air flows as shown by the arrow in FIG. 6 and the motor M can be cooled.

[0020]

[Effect of device]

 As described above, according to the present invention, it is not necessary to provide a shield plate separate from the end frame in order to prevent the inside of the motor from being directly exposed to water, which reduces the number of parts and the number of assembly steps. I can.

[Brief description of drawings]

FIG. 1 is an explanatory cross-sectional view of a main part showing a first embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a sectional view showing a second embodiment.

FIG. 4 is an enlarged partial sectional view of a second embodiment.

FIG. 5 is an enlarged partial sectional view of the second embodiment.

FIG. 6 is a sectional view showing a third embodiment.

[Explanation of symbols]

 12 Armature 12 Armature 13 Rotating shaft 14 Bearing part 15 Commutator 16 Brush device 17 Housing 18 End frame 19 Vent hole (cooling hole) 20 Shielding pin 21 Large diameter pin 22 Small diameter pin 23 Shielding plate 23a Unevenness 24, 26 End frame 25 Waterproof wall 27 Vent 28 Inner wall M Motor

Claims (3)

[Scope of utility model registration request] 1. An automobile motor having a housing having a vent hole, wherein a plurality of shielding pins integrated with the end frame extend from the end frame so as to cover the vent hole and a gap from the vent hole. A cooling structure for an automobile motor, wherein the cooling structure is provided. 2. A motor for an automobile having a housing provided with a vent, characterized in that a projection surface integrated with the end frame is formed so as to cover the vent with a gap from the vent. Cooling structure for automobile motors. 3. The shield pin integrated with the end frame and the protruding surface are formed in a maze structure.
A cooling structure for an automobile motor as described above.