JPH0736155Y2 - Fan - Google Patents

Description

Detailed Description of the Invention (a) Field of Industrial Application The present invention relates to a fan that performs a swing motion.

(B) Conventional technology As a technology prior to the present invention, there is a fan described in Japanese Utility Model Publication No. 57-32314. The fan has a pivot extending vertically from the front of the support plate, and the electric motor is mounted on the support plate so that it is located above the pivot.
A swing motor is mounted on the rear part of the support plate behind the electric motor.

(C) Problems to be solved by the invention In the conventional technology, although the electric motor is located slightly behind the neck piece that supports the pivot, when assembled as a fan, the weight due to the guard body and the blower blades is in front of the neck piece. Positioned at, the force acting to either tilt the neck piece forward or rotate it in the depression direction acts as a whole fan.

As a result, it is difficult to balance and support the elevation angle adjustment of the neck piece in a stable manner, and not only horizontal force but also vertical force and twisting force act on the cam body and swing link driven by the swing motor. As a result, the swinging motion is crispy and it is difficult to smoothly perform the swinging motion.

In view of the drawbacks of the prior art, the present invention has as its technical problem the provision of an electric fan capable of particularly smooth swinging motion.

(D) Means for Solving Problems The present invention is directed to a fan support, a neck piece that supports the support so that the elevation angle can be adjusted, and a support that is pivotally supported by the neck piece so as to swing. A plate, a swinging device formed rearward of the pivot of the support plate, an electric motor fixed to a rear side of the swinging device of the support plate, the rotation shaft of which extends to the front of the support plate, A guard body mounted on the front side of the pivot of the support plate, and a blower blade covered with the guard body and mounted on the rotary shaft are provided.

(E) Operation The present invention is to balance the weight of the front and rear by arranging the guard body, the blower blade, which is a heavy part, the electric motor and the swinging device, separately about the axis.

(F) Embodiments The present invention will be described based on an embodiment in which the fan main body 2 of the fan 1 swings with respect to the fan support 3 by the swing motor 4.

The electric fan 1 has the shape of the right side view shown in FIG. 2, the electric fan support 3 is made of a synthetic resin base with projecting posts, and the neck piece 5 is adjustable on the upper and lower forks of the elevation angle. Support.

The fan support 3 is internally provided with a control unit that controls the electric motor 6 and the swing motor 4. The fan main body 2 includes an electric motor 6 that drives the blower blades 7, a swing motor 4 as a swinging device that swings the fan main body 2 with respect to the neck piece 5, and a guard body 8 that covers the blower blades 7. ing. The swing motor 4 and the electric motor 6 are mounted on a support plate 10 having a pivot 9 for vertically supporting the neck piece 5.

FIG. 1 is a main sectional view of the fan main body 2. The support plate 10, the swing motor 4 and the electric motor 6 are covered by a flat plate-shaped front case 11 and a cup-shaped rear case 12. FIG. 2 is an exploded perspective view of the support plate 10 and the neck piece 5.

The support plate 10 is formed by bending a sheet metal into a U shape and including a front wall 10a, a lower wall 10b, and a rear wall 10c. At the center of the front part of the lower wall 10b, a pivot 9 is hung vertically by caulking. The swing motor 4 is fixed by screws from the center to the rear of the lower wall 10b. The swing motor 4 is formed of a synchronous motor, a warren motor, or the like, has a reduction gear mechanism incorporated therein, and the drive shaft 13 projects from the peripheral portion.
With the swing motor 4 fixed to the lower wall 10b, the swing motor 4 projects downward from a through hole formed in the rear portion of the lower wall 10b. A pair of eccentric rotary plates 14 and 15 which are vertically stacked are attached to the drive shaft 13, and the eccentric rotary plates are attached.
The one end ring part of the swing link 16 is pivotally supported by being fitted to the step formed around 14 to prevent the swing link 16 from coming off by the eccentric rotation plate 15, and the eccentric rotation plate 15 is attached to the pivot support plate 17. Is pivotally supported. The pivot plate 17 is fixed to the lower surface of the support plate 10 with screws. The other end of the swing link 16 is pivotally supported on the neck piece 5. Drive shaft 13
By vertically extending from the peripheral portion of the swing motor 4, the distance between the neck piece 5 and the drive shaft 13 can be made sufficient without increasing the lower wall 10b of the support plate 10.

Through holes 18 and 19 are formed in the center of the front wall 10a and the rear wall 10c of the support plate 10, and the rotary shaft 20 of the electric motor 6 fixed by a screw is inserted into the rear surface of the rear wall 10c. The blower blade 7 is detachably attached to the tip of the rotary shaft 20 by a spinner. The rotating shaft 20 is formed to be longer than the length of the support plate 10, and its bending causes a through hole.
By forming a bearing in the through hole 18 in order to cause abnormal noise due to contact with 18 and 19 and stable rotation of the blower blade 7,
The runout of the rotary shaft 20 can be prevented.

As the electric motor 6, a DC brushless motor is used in this embodiment to reduce the size and improve the motor efficiency. Compared with the conventional technology, the front and rear arrangements of the electric motor 6 and the swing motor 4 are reversed, but the front and rear dimensions can be made more compact.

The front case 11 is fixed to the front wall 10a of the support plate 10 with screws,
The rear case 12 is fixed to the front case 10 with screws. A mounting cylinder portion 21 is formed in the center of the front case 11, and a guard body 8 is detachably mounted by a nut body 22 screwed onto the mounting cylinder portion 21.

A guard body 8 and a blower blade 7 with the pivot 9 of the support plate 10 as a boundary
Is arranged in the front, the swing motor 4 and the electric motor 6 are arranged in the rear, and the electric motor 6, which is the heaviest object, is arranged in the rear, so that the weight balance between the front and rear can be balanced without using the balance weight. . Since the weight balance between the front and rear is substantially balanced, it is possible to eliminate a rattling or the like in the swinging motion around the pivot 9, and to perform a smooth swinging.

It should be noted that the present invention is not limited to the above-described embodiments, but can be implemented with various structures without departing from the configuration and the working effects. For example, the oscillating device may be formed of a gear mechanism, and the oscillating motion may be performed by connecting and mounting the oscillating device so as to cover it in the middle of the rotary shaft 20.

(G) Effect of the Invention The present invention is arranged with a swinging device and an electric motor for balancing the weight with respect to the guard body and the blower blade, which are the weight parts in front of the pivot of the support plate. Behind,
Moreover, since the electric motor, which is a heavier load, is placed behind the oscillating device, it is possible to effectively balance without using a separate balance weight. It is possible to perform an accurate swing.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a sectional view, FIG. 2 is a side view, and FIG. 3 is an exploded perspective view. 1 ... Fan, 2 ... Fan mainly, 3 ... Fan supporter, 4 ... Shaking motor (shaking device), 5 ... Neck piece, 6 ... Electric motor, 7 ... Blower, 8 ... Guard body,
9 ... Axis, 10 ... Support plate.

Claims (1)

[Scope of utility model registration request] 1. A fan support, a neck piece that is supported on the support so that the elevation angle can be adjusted, a support plate that is swingably supported by the neck piece on a pivot, and the support plate is more than the pivot. A swinging device formed on the rear side, an electric motor which is fixed further rearward than the swinging device of the support plate, and whose rotation axis projects to the front of the support plate, and which is mounted in front of the pivot shaft of the support plate. An electric fan comprising a guard body and a blower blade covered with the guard body and attached to the rotary shaft.