JPS606637Y2 - Fan - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an electric fan, and particularly to a support structure for a fan motor.

Examples of the present invention will be described in detail below.

First, to explain the outline of the electric fan in Figure 1,
The electric fan has a stand 1 containing control parts and a support 2 that can be adjusted up and down, and a neck assembly 3 consisting of a neck holder and a neck piece to be described later is installed at the upper end of the support 2.
This neck assembly 3 has a structure in which a fan head H is supported.

The fan head H includes a fan 4, a protective net 5, a motor cover 6, and internal structures described below.

Next, the internal structure will be explained in detail with reference to FIGS. 2 to 4.

The fan motor 7 is composed of a rotor assembly having a housing 8, a stator cover 9, a stator assembly (not shown), and a rotor shaft 10, and is assembled in the same process as a general-purpose motor.

The housing 8 and the stator cover 9 are coupled together by bringing the flange 11 of the housing 8 and the flange 12 of the stator cover 7 into contact with each other and tightening them with screws 13.

Further, a fan 4 is attached to the rotor shaft 10.

The oscillating motor 14 is a small low-speed motor such as a Warren motor, and has mounting tongues 15 protruding in opposite directions on its outer circumferential surface.
has.

Thus, the fan motor 7 and the swing motor 14 are mounted on the same mounting board 16.

As shown in FIG. 3, this mounting board 16 consists of a bottom wall 17 and a circumferential side wall 18 excluding the front surface, and mounting pieces 19 and 19 are provided on both sides of the front part of the circumferential side wall 18, and mounting pieces 20 and 19 are provided on both sides of the rear part of the circumferential side wall 18. 20
are formed by bending each.

The flange portions 11.12 of the fan motor 7 are abutted against the mounting pieces 19.19 from the rear, and the fan motor 7 is mounted by tightening these ends with screws 21.

Further, the mounting tongue piece 15 of the oscillating motor 14 is abutted against the other mounting receiving piece 20, 20, and the oscillating motor 14 is mounted by tightening both with screws 22.

In this mounted state of the swing motor 14, its shaft 23 penetrates the through hole 24 of the bottom wall 17 of the mounting board 16 and projects downward.

A projecting piece 25 having a screw hole 26 is provided on the rear edge of the mounting board 16 in order to attach the motor cover 6.

Further, a bottomed cylindrical shaft portion 27 is integrally provided in the front part of the bottom wall 17 of the mounting board 16 by drawing processing.
It has a through hole 28 in its bottom wall.

The swinging mechanism 29 consists of a crank 30 having bosses 31 at uneven positions, and a swinging rod 33 whose one end is fitted into the boss 31 and rotatably supported by a screw 32.The crank 30 is connected to a swinging motor. It is fixed to the shaft 23 of 14 with a screw 34 or a knock pin.

The mounting board 16 is rotatably mounted to the bearing part 36 of the neck piece 35 using a washer 37 and a set screw 38 inserted through the through hole 28 of the shaft part 27. The free end of 33 is inserted into the boss portion 39 of the neck piece 35.

This mounting board 16 approaches the tip of the boss portion 39 while being supported by the neck piece 35 to prevent the swinging rod 33 from coming off.

Next, the assembly order will be explained.

First, attach the oscillating motor 14 to the mounting board 16 so that the shaft 23 is inserted into the through hole 2.
It is attached with screws 22 so as to protrude downward through 4.

After this step, the crank 30 is fixed to the shaft 23 of the oscillating motor 14 with a screw 34 or a knock pin, and the oscillating rod 33 is pivotally supported on the boss portion 31 of the crank 30 with a screw 32 to complete the oscillating device assembly. After completion, the shaft portion 27 of the mounting board 16 is attached to the bearing portion 36 of the neck piece 35 with the stepped screw 38, and at the same time, the swing rod 33 is inserted into the boss portion 39 to complete the swing device. The assembly is supported on the stand 1 side.

Then, the oscillating device assembly and the fan motor 7, which were assembled in separate steps, are combined.

That is, the fan motor 7 is mounted on the mounting board 16 at the flange portion 11.
By fixing 12 to the mounting pieces 19 and 19, the internal structure of the fan head H is completed.

Incidentally, if the peripheral side wall 18 of the mounting board 16 is brought into contact with the fan motor 7 in the mounted state, the mounted state becomes more secure.

FIG. 5 shows the pivot structure of the oscillating rod 33 in an electric fan equipped with a double oscillating mechanism.

The stand-side pivot end of the swing rod 33 is rotatably supported by the neck piece 35, and its rotational movement is controlled by the spring 4.
It is fitted and supported by a boss portion 43 of a swinging ring 42 which is articulated by a snap pin 41 which is elastically supported at 0.0.

In the figure, 44 indicates an annular structure for storing oil.

The present invention has the above-mentioned structure, but in the past, a spindle formed by cutting or the like was fixed to the mounting board by caulking, and the fan motor was pivotally supported on the stand side member using this spindle. In addition to requiring a special part called a spindle, spindle crimping work is also required, which requires high precision in terms of crimping strength and inclination, which increases assembly time and reduces work efficiency, further increasing parts and assembly costs. It had the disadvantage that it was expensive.

However, according to the present invention, a bottomed cylindrical shaft portion projecting downward is integrally formed on the mounting board to which the fan motor is fixed by drawing processing, etc., and this shaft portion is attached to the bearing portion of the stand side member. The mounting board is rotatably supported on the stand side member by rotatably mounting it with a stepped screw inserted through the through hole in the bottom wall of this shaft, so high precision has traditionally been required. The spindle caulking work previously used can be omitted, reducing assembly time and improving workability, as well as reducing costs compared to attaching a spindle formed by cutting to the mounting board by caulking. can.

[Brief explanation of the drawing]

Figure 1 is an external view of the proposed electric fan, Figure 2 is a component showing the internal structure of the fan head, Figure 3 is a perspective view of the mounting board, Figure 4 is a sectional view of the main parts of the fan, and Figure 4 is a sectional view of the main parts of the fan. FIG. 5 is a sectional view of the main part when the double swing mechanism is provided. 7: Fan motor, 16: Mounting board, 27: Shaft, 28
: Through hole, 35: Neck piece, 36: Bearing part, 38 Two-stage screw.

Claims (1)

[Scope of utility model registration request] A cylindrical shaft portion with a bottom that protrudes downward is integrally formed on the mounting board to which the fan motor is fixed by drawing processing, etc., and this shaft portion is attached to the bearing portion of the stand side member, and the bottom wall of this shaft portion is 1. An electric fan characterized in that a mounting board is rotatably supported on a stand side member by rotatably mounting the mounting board with a stepped screw inserted through a through hole of the fan.