JPH0660265U - Electric fan - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a compact, lightweight, low-cost, highly reliable, high-output electric fan. [Structure] The shroud 20 has a substantially cup shape in the vicinity of the center of the motor mounting portion and is composed of a motor contact flat portion 13 and a motor fixing portion 18. The motor 11 seals the brush holder opening 14 and the lead wire contact portion 15. The waterproof property is ensured by the seal between the motor flat portion 17 and the flat contact portion 13 of the shroud 20, and the motor fixing portion 18 or the motor fixing fitting 19 is securely fixed to the shroud. The end surface of the bearing housing portion 12 and the substantially cup-shaped end surface portion 21 of the shroud are brought into contact with each other by a heat conduction sealing material.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an automobile radiator and an electric fan for cooling a condenser.

[0002]

[Prior art]

 In recent years, electric fan motors for automobiles have been required to have higher output in order to obtain a larger airflow performance, and accordingly, heat resistance performance is required to be improved.

A conventional electric fan will be described below. FIG. 3 shows a configuration of a conventional electric fan in a set state. Reference numeral 1 is a shroud, 2 is a flat motor, 3 is a flat motor mounting leg portion, and 4 is a fan portion. As shown in Fig. 3, this type of electric fan has a waterproof structure with a waterproof seal for the motor alone, has legs for attachment to the shroud, the fan is attached to the motor shaft, and the legs of the motor are attached to the shroud. It was common to fix using.

[0004]

[Problems to be solved by the device]

 However, in the conventional configuration described above, when a high output of the motor is achieved, the temperature rise of the bearing portion on the side opposite to the fan has been a problem. In other words, when the motor is running, the temperature of the above bearings becomes high, which causes bearing lock, which is an obstacle to higher output of the motor.

The present invention solves the above-mentioned conventional problems, and an object thereof is to suppress the temperature rise of the bearing portion on the side opposite to the fan, and to provide a higher output electric fan motor more compactly and at low cost. And

[0006]

In order to achieve this object, the electric fan of the present invention eliminates the legs for attaching the motor part to the shroud, and the shroud is substantially cup-shaped near the center of the motor attachment part. It has a shape, the sealing surface is applied to the flat surface of the mating surface or a waterproof sheet is sandwiched, and the motor is fixed by the fixing claw part of the shroud, and the end face of the housing that holds the bearing on the non-fan side and the shroud A sealant for heat conduction is used between the cup-shaped end face and the end face.

[0007]

[Action]

 With this configuration, the heat generated by the anti-fan side bearing section is transferred to the shroud by contacting the motor by applying a heat-conducting seal material between the anti-fan side bearing section and the shroud. The shroud has the effect of being cooled by the wind generated by the operation of the electric fan motor itself (in the case of a suction fan).

[0008]

【Example】

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

In FIG. 1, the motor 11 comprises a motor flat portion 17 of a bracket B 12, a brush holder opening portion 14, and a lead wire connecting portion 15.

The central portion 16 near the motor mounting portion of the shroud 20 has a substantially cup shape, and includes a motor contact flat surface portion 13, a motor fixing portion 18, and a substantially cup-shaped end surface portion 21.

The motor 11 eliminates the seal between the brush holder opening 14 and the lead wire connecting portion 15, and ensures the waterproof performance by the seal between the motor flat portion 17 and the motor contact flat portion 17 of the shroud 20, A heat conduction seal member is provided between the end face of the motor non-fan side bearing housing part 12 and the substantially cup-shaped end face part 21 of the shroud 20 which is securely fixed to the shroud by the motor fixing portion 18 or the motor fixing metal fitting 19. It is an electric fan that has a structure that allows it to come into contact with each other.

[0012]

[Effect of device]

 As is apparent from the above-described embodiments, the method for ensuring reliable contact between the end surface of the non-fan side bearing housing portion of the motor and the substantially cup-shaped end surface of the shroud with the heat-conducting sealing material prevents the reaction during motor operation. The heat generated from the fan side bearing is conducted to the shroud and the shroud is cooled by the wind from the fan. As a result, the temperature rise of the anti-fan side bearing is greatly reduced (-8d eg). It is possible to provide higher output motors more compactly and at low cost.

[Brief description of drawings]

FIG. 1 is a plan sectional view showing a configuration of an electric fan according to an embodiment of the present invention.

FIG. 2 is a plan sectional view showing a configuration of an electric fan according to an embodiment of the present invention.

FIG. 3 is a cross-sectional plan view showing the configuration of a conventional electric fan.

[Explanation of symbols]

 12 Motor non-fan side housing portion 13 Motor contact flat surface portion 14 Brush holder opening portion 15 Lead wire connection portion 16 Shroud substantially cup-shaped portion 17 Motor flat surface portion 18 Motor fixing portion 19 Motor fixing metal fitting 20 Shroud 21 Shroud substantial cup portion Shape end face

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shumei Morino 1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric Industrial Co., Ltd.

Claims (2)

[Scope of utility model registration request] 1. An electric fan comprising a flat motor, a fan, and a shroud that also serves as a fan guide and the motor is mounted. The shroud has a substantially cup shape in the vicinity of the central portion of the motor mounting portion. Contact flat parts are arranged on both mating surfaces of the shroud, and a sealing agent is applied to the mating surface flat parts or a waterproof sheet is sandwiched to fix the motor by the fixing claws of the shroud, and a position opposite to the fan side. 2. An electric fan characterized by using a heat-conducting seal material between an end surface of a housing portion that holds the bearing in FIG. 1 and a substantially cup-shaped end surface portion of the shroud. 2. The electric fan according to claim 1, wherein the shroud and the motor are fixed by separate metal fittings.