JPH0124983B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a blower device used for exhausting indoor air to the outdoors, sucking outdoor air into a room, transferring air between indoor rooms, etc.

(b) Prior Art As a prior art to the present invention, there is a ventilation fan door opening/closing device described in Japanese Patent Publication No. 30-9035. In this device, a stator of a ventilation fan motor is rotatably supported, and the door is rotated using the rotational reaction force of the motor acting on the stator. However, since the door is opened and closed using links and rods, rotational reaction force is directly converted into downward force, resulting in a large loss. Furthermore, since the stator of the electric motor is supported by bearings installed at the intersections of cross-shaped frames, dirt, oil, etc. may adhere to the bearings over long periods of use, increasing bearing resistance and causing the stator to become It will no longer rotate.

(c) Object of the Invention The present invention provides an air blower equipped with a shutter opening/closing mechanism that operates smoothly even during long-term use.

(d) Structure of the Invention The present invention includes a frame body having an opening at one end attached to which a shutter can be opened and closed, a tension wire for opening and closing the shutter,
An electric motor has a motor case in which a stator is press-fitted and a rotor is pivotally supported, a cylindrical shaft formed in the center of the entire surface of the motor case through which the rotating shaft of the rotor passes, and a shaft part formed in the center of the rear surface of the motor case. a support body that covers the electric motor and rotatably supports the electric motor in the center of the frame using the cylindrical shaft and a shaft portion; a blower blade attached to the rotating shaft of the rotor that protrudes from the cylindrical shaft; The object of the present invention is solved by means of forming an air blower with a winding part formed on a protruding shaft part and winding up a tension wire by a rotational reaction force acting on a stator.

When the motor is operated, the motor rotates in reverse relative to the support due to the reaction force of the stator against the rotor, and this reverse rotation is stable because it is supported by the cylindrical shaft and the shaft. move.

The electric motor is covered with a support, and the wind generated by the blower blades flows around the support.

(E) Examples The first embodiment shown in FIG. 1, the second embodiment shown in FIG. 2, the third embodiment shown in FIG. 3, the fourth embodiment shown in FIG. 4, the fifth embodiment shown in FIG. The present invention will be explained based on the ventilation fan shown in the sixth embodiment shown in FIG.

The ventilation fan 1 of the first embodiment includes a rectangular cylindrical sheet metal frame 2 that is inserted into an opening in a room wall, etc., and the frame 2.
a plurality of shutters 3 pivoted to the rear opening of the
A connecting rod 4 that opens and closes the shutter 3 in conjunction with each other, and a protrusion 5 of the connecting rod 4 that has one end locked to the frame 2 and the other end.
a spring body 6 that urges the connecting rod 4 engaged with the shutter in the shutter closing direction; and a frame body 2 that comes into contact with the protrusion 5 when the shutter 3 is opened to restrict further opening of the shutter 3. a support rod 8 extending toward the center of the frame 2; a cup-shaped front support 10 and a rear support 11 fixed to the support rod 8 with screws 9; An electric motor 12 rotatably supported within the support 10 and the rear support 11
, a blower blade 15 that is detachably attached to the rotating shaft 13 of the electric motor 12 with a spinner 14, and a wind tunnel 16 that is detachably attached to the front opening of the frame 2.
A synthetic resin front cover 17 formed with a
It consists of a shutter opening/closing mechanism that pulls down the connecting rod 4 by the rotational reaction force of 2.

The electric motor 12 includes a stator 18, a cup-shaped electric motor front case 19 and a rear case 20 into which the stator 18 is press-fitted and supported, and bearings 21 and 21 formed at the center of the inner surfaces of the front case 19 and the rear case 20. The rotor 22 has the rotating shaft 13 that is supported by the rotor 22. A through hole through which the rotating shaft 13 is inserted is formed in the center of the front case 19, and a cylindrical shaft 23 that surrounds the rotating shaft 13 is provided in a protruding manner. At the center of the rear surface of the rear case 20, there is provided a winding shaft 24 which supports the electric motor 12 and forms the shutter opening/closing mechanism.

A through hole 25 is provided at the center of the front support 10 and the rear support 11, through which the cylinder shaft 23 and the winding shaft 24 are inserted.
25 as well as bearings 26, 26 for supporting the shaft. The power supply cord 27 to the electric motor 12 is pulled out from the side surface of the rear case 20, and after being given slack, is pulled out from the rear support body 11.

The shutter opening/closing mechanism includes the winding shaft 24, a tension wire 28 whose one end is attached to the protrusion 5 of the connecting rod 4, and whose other end is wound around the winding shaft 24, and a tension wire 28 that covers the wire 28 and has one end. A protective guide tube 29 is attached to the rear support body 11 and the other end is attached to the frame body 2.

When the electric motor 12 is driven, the rotor 2
Since the load of the blower blades 15 applied to the stator 2 is large, the stator 18 rotates in response to the rotational reaction force. As the stator 18 rotates, the winding shaft 24 rotates, winds up the wire 28, pulls down the connecting rod 4, and opens the shutter 3.
When the protrusion 5 of the connecting rod 4 comes into contact with the protrusion 7 of the frame 2, winding of the wire 28 is prevented and the stator 18 is locked. With the stator 18 locked, the electric motor 12 is rotated normally. When the electric motor 12 stops, the rotational reaction force applied to the stator 18 disappears, the stator 18 rotates in reverse, the wire 28 is rewound, and the shutter 3 is closed.

Structural parts in the second to sixth embodiments that are the same as those in the first embodiment are designated by the same reference numerals and names, and only essential parts of the third to sixth embodiments are illustrated.

In the second embodiment, the rear support member 11 and the support rod 8 are integrally formed, and the cylindrical shaft 30 protruding from the front case 19 is a separate member. Therefore, by forming the rear support body 11 at the same time as the support rod 8 is formed, the number of parts is reduced and assembly efficiency is improved. Further, by making the cylinder shaft 30 a separate member and attaching it to the front case 19, the strength of the cylinder shaft 30 is improved.

In the third embodiment, the winding shaft 31 is formed from the rear case 20 in the same manner as the cylindrical shaft 23, and the front case 19 and the rear case 20 can be made into the same shape, reducing the number of parts and simplifying parts management. It was calculated.

The fourth embodiment is a winding shaft 3 attached to a rear case 20.
2 has a cylindrical shape and is integrally formed with a disk-shaped attachment portion 33 to the rear case 20. A guide groove 34 communicating with the central through hole of the winding shaft 32 is formed in the mounting portion 33 . The power supply cord 27 is drawn out from the rear surface of the electric motor 12 into the guide groove 34, inserted through the winding shaft 32, and then drawn out of the rear support 11. Therefore, the resistance of the power supply cord 27 to rotation due to the reaction force of the electric motor 12 is reduced.

In the fifth embodiment, a rear support member 35 is made of an insulating material, and a disk-shaped mounting portion 37 made of an insulating material and having a winding shaft 36 protruding thereon is attached to the rear surface of the electric motor 12. A plurality of power supply rings 38, 38, 38 are attached to the rear surface of the mounting portion 37, and the lead wires of the electric motor 12 are connected to the power supply rings 38, 3.
It is wired to 8,38. Contact terminals 39, 39, 39 are fixed to a portion of the rear support 35 facing the power supply rings 38, 38, 38, and a power supply cord 27 is connected to the contact terminals 39, 39, 39. . Therefore, the contact terminals 39, 39, 3
Power is supplied by the sliding contact of the cord 9 to the power supply ring 38, and the power supply cord 27 is not twisted.

In the sixth embodiment, a power supply cord 2 is attached to the rear surface of the electric motor 12.
A winding shaft 41 on which a winding reel 40 of No. 7 is formed is attached, and the power supply cord 27 is connected to the electric motor 1.
By repeating winding and unwinding as the wire rotates, wires can be wired without getting tangled.

Note that the present invention is not limited to the first to sixth embodiments, and various structures are possible without departing from the gist of the present invention.

(F) Effects of the Invention In the present invention, the electric motor is rotatably supported in the front and rear of the support body, so that dust, dirt, etc. do not adhere to the electric motor and its axis support portion due to the air blown by the blower blades. Since the winding part is formed on the shaft part that protrudes from the support body, it also prevents dust and dirt.
It is difficult for dirt to adhere to it and allows for smooth movement even during long-term use.

In addition, the rotor is supported by the motor case separately from the support of the motor.
The rotation of the rotor with respect to the stator and the reversal of the stator with respect to the rotor can be performed smoothly without vibration, the shutter can be opened smoothly, and the air can be efficiently blown by the blower blades.

[Brief explanation of drawings]

Fig. 1 is a side sectional view showing the first embodiment of the present invention, Fig. 2 is a side sectional view showing the second embodiment, and Fig. 3 is the third embodiment.
FIG. 4 is a cross-sectional view of only the main parts showing the fourth embodiment. FIG. 5 is a cross-sectional view of only the main parts showing the fifth embodiment. FIG. 7 is a cross-sectional view of only the main parts showing the sixth embodiment. 2... Frame body, 3... Shutter, 10... Front support body, 1
DESCRIPTION OF SYMBOLS 1... Rear support body, 12... Electric motor, 15... Air blower blade,
24... Winding shaft (winding section).

Claims (1)

[Scope of Claims] 1. An electric motor having a frame body with a shutter attached to an opening at one end so that the shutter can be opened and closed, a tension wire for opening and closing the shutter, a motor case in which a stator is press-fitted and a rotor is pivotally supported, and an electric motor. A cylindrical shaft formed at the center of the front of the case through which the rotating shaft of the rotor passes, a shaft formed at the center of the back of the motor case, and a frame that covers the motor and allows the motor to rotate freely between the cylindrical shaft and the shaft. A support body is supported at the center of the body, a blowing blade is attached to the rotating shaft of the rotor that protrudes from the cylindrical shaft, and the extension wire is moved by the rotational reaction force acting on the stator formed on the shaft part that protrudes from the support body. A blower device consisting of a winding section. 2. A patent claim consisting of a support rod for erecting a support within a frame, and separate cup-shaped front and rear supports that are attached to the center of the support rod and rotatably support an electric motor. The air blower according to scope 1.