JPS6352239B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a ceiling fan using an epidermal motor.

Conventionally, ceiling fans using external rotor motors have been commercialized and sold widely to the general public, and the related technology is also old, and many various inventions and ideas have been made. Under such circumstances, many of them were
This is similar to the technique disclosed in Japanese Patent No. 3571, in which specific structural improvements are made in detail. The external rotor type ceiling fan disclosed in the above-mentioned publication has a rotor provided on the outside of a stator supported by a hanging tube, and the rotor covers the circumference of the stator except for the center of the lower surface. Further, the rotor is supported by a shaft connected to the suspension pipe protruding from the upper surface of the stator. Furthermore, the blades are fixed approximately at the center of the lower surface of the rotor. However, when the ceiling fan is operated, almost all parts around the ceiling fan rotate. Therefore, in consideration of air resistance to rotation and safety, the surrounding area is formed to have a smooth shape.
However, this is not a particular problem in cases where a decorative effect is not required for the installation location, such as in a factory, but in recent years this type of ceiling fan has been increasingly installed in living rooms, lobbies, etc., and the shape and color match the atmosphere of the installation location. was required. Furthermore, the above-mentioned shape and color were also required to be of a structure that could be easily changed when the installation location was remodeled. As an improvement on this point, as mentioned in the above-mentioned publication, some models have been made so that a protective lid can be attached for decorative effect.
It was not a fundamental improvement.

The present invention has been made in view of the above-mentioned drawbacks of the conventional technology, and an object of the present invention is to provide a ceiling fan that uses an epidermal motor and improves safety by reducing the exposure of rotating parts other than the blades. is the technical issue.

The present invention includes a support pipe suspended from a ceiling, a pipe-shaped central shaft connected to the support pipe, an inner stator attached and fixed to the outer periphery of the central shaft such that both ends of the central shaft protrude, and an outer periphery of the protruding portion of the central shaft. an outer rotor that is pivotally supported via a bearing; a cover that covers the inner stator and the outer rotor and has an opening formed in the center of the lower surface;
A control box is installed on the lower end of the center shaft exposed through the opening, and houses electrical components to which the power supply cord is wired inside the center shaft. The problem is solved by means of forming a ceiling fan using the blades of the ceiling fan.

By configuring a ceiling fan using the above-mentioned method, the outer rotor is covered with a cover, and the blades and their root parts that are exposed and protruding from the opening become rotating exposed parts, and the other rotating parts (outer rotor) are Not exposed.

The present invention will be explained below based on the embodiments shown in FIGS. 1 to 8.

1 is a ceiling fan of the present invention, and the ceiling fan 1 has a mounting device 2.
a support pipe 4 suspended from the ceiling 3 via;
It consists of a ceiling fan body 5 attached to the lower part of the pipe 4.

The mounting device 2 for suspending the support pipe 4 from the ceiling 3 includes a U-shaped metal fitting 8 having inner bent collar pieces 7, 7 at its tip, which are buried and fixed in a recess 6 formed in the ceiling 3. , a mounting fitting 9 which is installed over the collar pieces 7, 7 of the metal fitting 8, and a locking pin 11 which is inserted and locked into an insertion portion 10 bored in the upper part of the support pipe 4. The U-shaped metal fitting 8 may be buried in the ceiling 3 by fixing it in advance during ceiling construction, or
This may be done using bolts that are driven and fixed into the ceiling 3 after the ceiling is constructed. Furthermore, if the ceiling 3 is not made of concrete, for example, if it is made of steel or wood, various methods such as welding or screwing are possible.
The attachment fittings 9 are attached to the collar pieces 7, 7 using screws 12, 12 which are screwed into the collar pieces 7, 7. Through holes 14, 14, through which the screws 12, 12 are inserted, formed in the mounting part 13 of the mounting bracket 9;
is formed into a long hole so that the mounting position of the mounting bracket 9 relative to the U-shaped bracket 8 can be adjusted. There are hanging hanging pieces 1 on both sides of the mounting bracket 9.
5 are integrally bent. The lower part of the hanging piece 15 is bent outward into a U-shape to form a receiving part 16, and the inner wall of the receiving part 16 has a locking notch 1.
The upper part of the support pipe 4 through which the locking pin 11 having a shape of 7 is inserted is connected to the hanging piece 1.
5, both ends of the locking pin 11 are hooked onto the notch 17 so as to be placed on the receiving portion 16. By hooking the locking pin 11 to the mounting bracket 9, the support pipe 4 can be easily suspended without using a jig. The end of the locking pin 11 is located close to the outer wall of the receiving portion 16, so that it will not come off from the insertion portion 10 due to vibrations of the support pipe 4, etc., and will not lock into the notch 17. By being locked, the locking pin 11 will not come off from the mounting bracket 9 unless a force is applied to lift the support pipe 4, and as a result, the support pipe 4 can be stably suspended and supported. Further, the support pipe 4 has a structure that swings like a pendulum around the locking pin 11, and stably supports a vibrating body such as the fan body 5. Furthermore, the notch 17
Elastic caps 18 are fitted onto both ends of the locking pin 11 that is hooked on the locking pin 11, and the elastic caps 18 are almost press-fitted into the notch 17 and supported. Therefore, vibration transmitted from the fan body 5 to the support pipe is absorbed by the elastic cap 18, thereby preventing detachment of the locking pin 11 and abnormal noise between the locking pin 11, the support pipe 4, and the mounting bracket 9 due to vibration. It is possible. Although not described in this embodiment, in order to reliably prevent the support pipe 4 from coming off from the mounting bracket 9, in consideration of the occurrence of an earthquake with strong vertical shaking rather than horizontal shaking, the inside of the notch 17 is A locking member may be located between the hanging pieces 15. The locking material can be made of various materials such as an elastic material, and the locking material can be attached to the mounting bracket by screws, elastic locking, etc.

The electric fan main body 5 includes an external rotor type motor 22 comprising an inner stator 20 and a substantially dish-shaped outer rotor 21;
A cover 23 that covers the outer rotor type motor 22 and a plurality of plate-like blades 24 attached to the outer rotor 21.
and a switch 2 that controls the external rotary motor 22.
5 and a control box 27 housing a variable resistance 26 for speed adjustment. A pipe-shaped central shaft 28 is press-fitted into the center of the inner stator 20, and the central shaft 28 projects more toward the lower surface than the upper surface of the stator 20. A threaded portion 29 is formed on the outer periphery of the portion of the central shaft 28 that protrudes from the upper surface of the stator 20. A cylindrical holder 30 whose upper and lower inner surfaces are threaded is screwed into the threaded portion 29 . The holder 30 is connected to the central axis 2
At the same time as being screwed into the motor 8, the disk-shaped protection plate 31 that covers the upper surface of the motor 22 is fixed. The holder 30 is prevented from loosening with respect to the central shaft 28 by pressing the tip of a screw 32 screwed into the holder from the outside of the lower part of the holder 30 against the central shaft 28.
The protection plate 31 has a through hole 33 through which the central shaft 28 is inserted, and a concave portion that is pressed by the holder 30 and pressed against the central flat portion of the stator 20 where no winding 34 is present. 35 and the stator 20
It consists of a flat cover part 37 in which a through hole 36 is formed to draw out the end of the winding 34 to the upper surface of the protection plate 31, and a hanging collar part 38 formed on the outer periphery of the cover part 37. The diameter of the protection plate 31 is the same as that of the outer rotor 21.
The outside diameter is the same as or larger than the outside diameter. Most of the connections or wiring of the power supply cord 39 (not shown) to the winding 34 and the power supply cord 39 wired to the switch 25, resistor 26, etc. is performed on the upper surface of the protection plate 31 isolated from the winding 34. Therefore, the wiring and connection portion is the winding 34.
In addition, even if there is some slack in the wiring, it will not come into contact with the outer rotor 21 and damage the power supply cord 39. Capacitor 40 for starting the motor 22
is fixed to the holder 30 with screws 41. Further, the lower part of the support pipe 4 is screwed into the threaded part of the upper part of the holder 30, and if the pipe 4 is loosened with respect to the holder 30, the tip of the screw 42 screwed in from the outside of the upper part of the holder 30 is fixed to the support pipe 4. This is done by pressing against the pipe 4. The support pipe 4, the holder 30, and the center shaft 28 are connected to form one pipe, and the power cord and power supply cord 39 (not shown) are passed through the support pipe 4, the holder 30, and the center shaft 28, and are connected to the holder. It is pulled out onto the protection plate 31 through an insertion hole 43 formed in the center of the wire 30 and connected to the winding 34 . The power cord, the power supply cord 39, the winding 34, etc. may be connected using conventionally known connectors such as crimp terminals, or
Various methods are conceivable, such as screwing a terminal to the protection plate 31 and performing the operation via the terminal.

The cover 23 is composed of an upper cover part 50 and a lower cover part 51, and is molded from synthetic resin. The holder 3 is located in the center of the upper cover part 50.
A through hole 52 is formed through which the wire 0 is inserted. The upper cover part 50 is fixed to the protection plate 31 with screws 53. A bulging portion 54 is formed in a portion of the upper cover portion 50 facing the protection plate 31, and a cord storage space 55 is formed between the bulging portion 54 and the protection plate 31. A cylindrical rib 56 is formed on the inner surface of the upper cover part 50, into which the outer peripheral flange part 38 of the protection plate 31 fits. The upper cover portion 50 has a cylindrical boss portion 58 for fixing the lower cover 51 with a screw 57 and a mounting portion 60 for attaching a rotation changeover switch 59 for appropriately changing the rotation direction of the motor 22 on the inner surface of the outer circumference of the upper cover portion 50. and the switch 5
Rib 62 for holding power supply cord 61 to 9
It has been established that A portion of the cylindrical rib 56 facing the mounting portion 60 protrudes further downward to form a contact prevention piece 63 between the power supply cord 61 and the outer rotor 21 . The lower cover part 5
1 has a donut plate shape with an opening 64 formed in the center. a groove portion 65 into which the lower edge of the outer periphery of the cover portion 50 fits into the inner outer peripheral portion of the lower cover portion 51;
A boss 66 into which the screw 57 inserted into the cylindrical boss portion 58 is screwed, and the rotation changeover switch 59
A through hole 67 is formed through which the operating section of the holder protrudes.
A large number of radially extending decorative pores 68 are formed in the lower cover portion 51. The inner surface of the lower cover part 51 has the pores 68 formed therein.
A decorative donut-shaped disk 69 is attached to close the area. The disc 69 is molded from foamed resin,
The motor 2 not only improves the decorative effect, but also
It also acts to absorb the sound generated by 2. The disk 69 may be attached by adhesives, screws, etc., or, as in the embodiment, it may be positioned by a pin 70 and at the same time a locking washer is attached to the pin.

The outer rotor 21 is supported by a central shaft 28 that is vertically provided on the lower surface of the inner stator 20. The outer rotor 21 is formed into a substantially dish shape, and the rotor 21 has a bulge 71 located in the opening 64 of the lower cover part 51 in the center thereof, and a pair of bearings 7.
A bearing housing cylinder part 73 is formed to accommodate the bearings 2 and 72. A portion of the storage cylinder portion 73 further protrudes from the bulge portion 71, and a through hole 74 through which the central shaft 28 is inserted is formed in the center of the protruding portion. The one bearing 72 is attached to the protruding portion.
is press-fitted. The other bearing 72 is inserted into the inner end of the accommodating cylindrical part 73, and in order to prevent it from falling into the cylindrical part 73, the two bearings 72, 7
A sleeve 75 is interposed between the two inner ring portions.
The storage cylinder portion 7 at the center of the inner surface of the outer rotor 21
A boss 76 is protruded near 3, and the boss 76
An annular pressing plate 78 that prevents the other bearing 72 from coming off is fixed with a screw 77 to. The outer rotor 21 is prevented from coming off from the center shaft 28 by a nut 80 that is screwed into a threaded portion 79 formed at the bottom of the center shaft 28. Sleeves 81 and 82 are interposed between the stator 20 and the inner ring portion of the other bearing 72 and between the nut 80 and the inner ring portion of the one bearing 72. A gap is formed between the nut 80 and the nut 80 to prevent contact. The sleeves 81 and 82 serve as spacers. As described above, the motor 22 is covered with the cover 23 except for the bulge 71 of the outer rotor 21 exposed through the central opening 64 of the lower cover portion 51, and the rotating portion is not exposed to the outside. .
Therefore, the cover 23 can be formed in any shape and material, and can be made to be suitable for the mounting location. Further, even in the case of changing it, it can be done by simply changing only the cover 23.

The blades 24 are connected to the bulge 7 of the outer rotor 21.
1 is fixed to the lower surface with screws 90. In order to reduce the number of fixing locations with the screws 90, the bulging portion 71 is
A locking portion 91 for positioning and rotation prevention and a screw hole 92 into which the screw 90 is screwed are formed in the housing. The mounting portion 93 of the blade 24 is formed with an engaging portion 94 that engages with the locking portion 91 and an insertion portion through which the screw 90 is inserted. Therefore, by sufficiently designing the coupling force between the screw 90 and the screw hole 92, the blade 24 can be reliably attached without rattling. In this way, the blades 24 are attached to the lower surface of the bulge 71, so-called the fan main body 5, so even if the main body 5 is mounted close enough to touch the ceiling 3, the blades 24
4 can be easily attached and removed.

The control box 27 is fixed to the central shaft 28 with the nut 80 at the same time as the outer rotor 21 is installed. The threaded portion 79 at the bottom of the center shaft 28 is formed to have a substantially D-shaped cross section, and is used to prevent rotation of the center shaft 28 when the control box 27 is attached. The control box 28 includes an inverted cup-shaped control frame 101 made of synthetic resin with an insertion hole 100 formed in the center of the upper surface, and an inverted U-shaped reinforcing metal fitting 102 mounted inside the frame 101.
and a synthetic resin closing plate 104 which is fixed to the lower end of the reinforcing metal fitting 102 with a screw 103 and closes the opening at the lower end of the frame 101. The insertion hole 10
0 has a circular shape into which the sleeve 82 fits. The reinforcing metal fitting 102 has bosses 105, 105 vertically provided on the upper surface of the frame portion 101, and screws 106,
It is fixed at 106. A substantially D-shaped insertion hole 107 that fits into the threaded portion 79 of the central shaft 28 is formed in the center of the upper surface of the reinforcing metal fitting 102 . The integrated member of the frame part 101 and the reinforcing metal fitting 102 is inserted into the threaded part 79, and by fitting into the substantially D-shaped insertion hole 107, rotation about the central axis 28 is prevented, and the threaded part The reinforcing metal fitting 1 is inserted between the nut 80 screwed into the nut 79 and the lower end of the sleeve 82.
The peripheral edge of the insertion hole 104 of 02 is clamped to prevent it from coming off. The screw portion 79 of the nut 80 is prevented from loosening by a regulating plate 108 which is adjustably attached to the fixing screws 106, 106 of the reinforcing metal fitting 102. The regulation plate 108 has a fitting hole 10 in the center thereof which fits into the side surface of the nut 80.
9 is formed. If the nut 80 has a hexagonal shape, the fitting hole 109 is formed into a hexagonal or dodecagonal star-shaped hole. At both ends of the regulation plate 108, there are insertion holes 11 through which the screws 106 are inserted.
0, and the insertion hole 110 is approximately crescent-shaped with the nut 80 at its center. Therefore, even if the tightening completion position of the nut 80 does not remain at the position shown in the figure, the regulating plate 108 can be mounted in a slightly rotated state with respect to the reinforcing metal fitting 102. The switch 25 and the resistor 26 are attached to a mounting portion formed in the frame portion 101;
Alternatively, it can be attached to the reinforcing metal fitting 102 with screws or the like. In this embodiment, a reinforcing metal fitting 102 is installed inside the frame portion 101, and the reinforcing metal fitting 102 also prevents rotation toward the central axis 28, but this is not particularly necessary and the frame portion 101
The insertion hole 100 may be formed into a substantially D-shaped hole. In addition, a sleeve 82 that presses the inner ring portion of the bearing 72 is molded separately, but the frame portion 1
01 insertion hole 100 periphery or the reinforcing metal fitting 1
The sleeve 82 may be integrally molded around the periphery of the insertion hole 107 of 02. A closing plate 104 is fixed to the lower end of the reinforcing metal fitting 102 with a screw 103, but this is not particularly limited, and various devices such as decorations and lighting devices can be installed therein. Furthermore, if a flange is formed on the upper surface of the frame portion 101 to cover the bulge portion 71 of the outer rotor 21 on which the blades 24 are attached, the fixed portion of the blades 24 cannot be seen directly; Improves appearance.

FIG. 8 is an electrical circuit diagram of the ceiling fan of the present invention, in which the switch 25 is turned on and off by a pull cord 120 to stop the motor 22. By changing the set value of the resistor 26 by turning the knob 121, the rotational speed of the motor 22 can be changed as needed. The resistor 26 is not particularly required, and the switch 25 can be used as a multi-stage switch to control the motor 2.
The speed may be controlled by appropriately switching the adjustment tap drawn out from the second winding 48. The rotation changeover switch 59 is used to change the direction of rotation of the motor 22. In summer, the motor 22 is rotated in the forward direction to blow air down from the ceiling 3 toward the floor, giving the user a cool feeling, and in the winter, the motor 22 is rotated in the reverse direction. Air is blown upward toward the ceiling 3 to form a circulating air flow in the room without making the user feel the air flow, and warm air accumulated near the ceiling 3 is sent toward the floor.

As described above, the present invention includes a support pipe suspended from the ceiling, an inner stator attached to the pipe,
a substantially dish-shaped outer rotor pivotally supported by a central shaft vertically disposed from the stator; a cover that covers the circumferential surfaces of the inner rotor and the outer rotor and has an opening at the center of the lower surface;
It consists of a plurality of blades fixed to the center part of the lower surface of the outer rotor exposed through the opening, and even though an external rotor type motor is used, the outside can be covered with a cover that does not rotate. , the ceiling fan can be formed into various shapes, etc.

[Brief explanation of drawings]

Fig. 1 is a side view with some of the blades of the ceiling fan of the present invention omitted, Fig. 2 is a sectional view, Fig. 3 is an exploded perspective view of the mounting device, Fig. 4 is the same sectional view, and Fig. 5 is the top view. FIG. 6 is a bottom view of the connecting portion between the central shaft and the control box, FIG. 7 is an exploded perspective view of the connecting portion, and FIG. 8 is an exploded perspective view of the ceiling fan of the present invention. It is a circuit diagram. DESCRIPTION OF SYMBOLS 1...Ceiling fan, 4...Support pipe, 5...Ceiling fan body, 20...Inner stator, 21...Outer rotor, 23...Cover, 24...Blade, 28...Center shaft, 50 ... Upper cover part, 51 ... Lower cover part, 71 ... Bulging part (center part of lower surface of outer rotor).

Claims (1)

[Claims] 1. A support pipe suspended from the ceiling, a pipe-shaped central shaft connected to the support pipe, an inner stator attached and fixed to the outer periphery of the central shaft so that both ends protrude, and a bearing on the outer periphery of the protruding portion of the central shaft. The outer rotor is pivotally supported through the outer rotor, the inner stator and the outer rotor are covered, and the cover is formed with an opening in the center of the lower surface.The cover is attached to the lower end of the center shaft exposed through the opening, and the inside of the center shaft is wired. A ceiling fan consisting of a control box that houses electrical components to which a power supply cord is connected, and a plurality of blades arranged and fixed radially to the center of the lower surface of an outer rotor exposed through an opening.