JPS585117Y2 - ceiling fan - Google Patents

Description

[Detailed explanation of the invention] This invention uses a planetary gear to create a speed reduction mechanism, and positions the center of gravity of the ceiling fan on the axis of rotation, thereby achieving an extremely stable balance of the center of gravity and reducing costs. Regarding.

Generally, ceiling fans suspended from the ceiling have a rotation speed of 200~
Since the speed is as low as 300 rpm, the motor used as the drive source has a large number of poles, making it large and expensive.

Therefore, conventionally, in order to be able to use a small, inexpensive motor with a small number of poles, a two-stage reduction mechanism was constructed using pulleys or gears, and this reduction mechanism decelerated the high-speed rotation of the small motor and transmitted it to the fan. , set the fan speed to 200
Means for reducing the speed to ~300 rpm has been devised.

However, in the conventional example described above, the deceleration mechanism is located offset from the center of the ceiling fan, so the center of gravity of the ceiling fan is offset from the central axis, making the balance of the ceiling fan extremely unstable and shaking during the first drive. It is extremely dangerous.

Furthermore, since it is a two-stage speed reduction, the speed reduction mechanism becomes long in the vertical direction (rotation axis direction), which poses a design problem.

This invention solves the above-mentioned problems by constructing the speed reduction mechanism with planetary gears.
Embodiments will be described in detail with reference to drawings showing examples.

□1 is a support pipe for a ceiling fan suspended from the ceiling, and an electric cord passes through the pipe 1.

2 is a small monitor with a small number of poles attached to the lower end of the pipe 1 via the motor case τ, 3 is an upper cover attached to the pipe 1 to cover the motor 2, and 4... are attached to the upper cover 3. 5 is a rotating shaft of the motor 2 protruding from the bottom surface of the motor case τ, 6 is a transparent ventilation hole, and 6 is the motor case 2.
This is a bearing that is fixed to the pipe 1 and rotatably supports the rotating shaft 5. The bearing 6 positions the rotating shaft 5 on the central axis of the pipe 1.

Reference numeral 7 denotes a drive gear fixed in the rotational direction via a pin 8 to the rotating shaft 5, 9 is a cylinder provided outside the drive gear 7 and fixed to the motor canis γ with a screw 10, and 11- is a cylinder. Teeth formed on the inner peripheral surface of 9, 12, 12, . 1
2 meshes with the drive gear 7 and the teeth 11 of the cylinder body 9, and the rotating shaft 5
As the driving gear 9 rotates, the selected planetary gear 12, which is three planetary gears arranged at equal intervals around the center, revolves around the driving gear 9 while rotating.

13.14 is the shaft 1 of each planetary gear 12, 12.12 on both sides.
5, 15. A disc-shaped support plate supports and fixes 15, 16 is a fan bracket rotatably inserted through the bearing 17 of the rotating shaft 5 below the drive gear 7, and 18 is the fan bracket 16 and support This is a screw that integrates the fan bracket 16 with the plate 13, and as the one planetary gear 12 revolves around the drive gear 7, the fan bracket 16 also rotates together via the support plate 13.14.

A snap ring 19 is fitted to the rotating shaft 5 at the lower part of the bearing 17, and the pin 8 and the snap ring 19 prevent the driving gear 7 and the fan bracket 16 from moving in the thrust direction of the rotating shaft 5.

20... is a large fan provided in the radial direction from the outer peripheral edge of the fan bracket 16, 21... is a ventilation hole provided through the fan bracket 16, and 22 is a large fan through which the rotating shaft 5 passes through the center and is located at the outer edge. A lower cover is fixed to the fan bracket 16 with screws 23, 24... is a ventilation hole provided through the lower cover 22, and 25 is fixed to the tip of the rotating shaft 5 via a pin 26 and a snap ring 27. It's a small fan.

Next, the operation of the above embodiment will be explained.

When the motor 2 is driven and the rotary shaft 5 rotates, the rotational force of the rotary shaft 5 is transmitted to the planetary gear 1.2 via the drive gear 7, and the cylindrical body 9 is fixed to the motor case 2' and is immovable. Therefore, the planetary gear 12 revolves around the drive gear 7 in the same direction as the rotational direction of the rotating shaft 5 while rotating.

That is, the rotation of the rotating shaft 5 is decelerated by the planetary gear 12 and transmitted to the fan bracket 16 via the support plate 13, and the large fan 20 rotates at a low speed and blows air below the ceiling fan.

On the other hand, due to the rotation of the rotating shaft 5, the small fan 25 rotates at the same speed as the rotating shaft 5 without being decelerated. Air is taken in through 21 and 24 and sent to the center below the ceiling fan.

As described above, according to the ceiling fan of this invention, a driving gear is provided on the rotating shaft of the motor, a large fan is attached to the rotating shaft, and a fan bracket is rotatably inserted into the rotating shaft. A cylindrical body with teeth formed on the circumferential surface is fixed to the motor case, and a plurality of planetary gears that mesh with the driving gear and the teeth of the cylindrical body are arranged at equal intervals around the rotation axis. By fixing the shaft of each planetary gear to the fan bracket, it is possible to use a small, inexpensive motor with a small number of poles, reducing costs. Because it is located on a line, it is possible to obtain an extremely stable center of gravity balance, and the ceiling fan can provide stable air flow without shaking.
Furthermore, the length of the base of the ceiling fan in the vertical direction can be shortened, which is advantageous in terms of design and increases the product value.

Furthermore, by installing a small fan at the tip of the rotating shaft, it is possible to easily and inexpensively send a sufficient amount of air to the center of the lower part of the ceiling fan, where large fans could not send sufficient air, and it is uniform over the entire surface. It is possible to provide and provide suitable air volume and speed.

□By providing ventilation holes in the cover and fan bracket, the small fan will be able to take in air more smoothly, and the motor will be cooled by the intake air, increasing the output of the motor. The increased load due to installation can be absorbed, making the motor larger.

There's no need.

[Brief explanation of the drawing]

The drawings show one embodiment of the ceiling fan of this invention, with FIG. 1 being a cutaway front view of the main part, FIG. 2 being a partially removed bottom view of the main part, and FIG. 3 being an exploded perspective view of the main part. 2... Motor, 2'... Motor case, 5... Rotating shaft, 7... Drive shaft, 9 Part... Cylindrical body, 11...teeth, 12...
... Planetary gear wheel 157 ... Axis, ... 16 ...
...Fan bracket, 20...Large fan,
25...44' Juan.

Claims (1)

[Claims for Utility Model Registration] ■ A driving gear is provided on the rotating shaft of the motor, and a fan bracket to which a large fan is attached is rotatably inserted into the rotating shaft, and a fan bracket is provided on the outside of the driving gear and on the inner peripheral surface. A cylindrical body having teeth formed thereon is fixedly provided to a motor case, and a plurality of planetary gears meshing with the drive gear and the teeth of the cylindrical body are arranged at equal intervals around the rotation axis, A ceiling fan in which a shaft of each of the planetary gears is fixed to the fan bracket. ■ The ceiling fan according to claim 0 of the utility model registration, which has a small fan at the tip of the rotating shaft.