JPS6146234Y2 - - Google Patents

Description

[Detailed explanation of the idea] This proposal relates to a ceiling fan using an epidermal motor.

Conventionally, ceiling fans using external rotor motors have been commercialized and widely sold to the general public, and the related technology is also old, and many various inventions and ideas have been made. In this technical field, the external rotor motors used for ceiling fans can be roughly classified as
There are two types: one described in Japanese Patent Publication No. 36-23791.

In the ceiling fan described in the above-mentioned Japanese Utility Model Publication No. 56-41115, an outer rotor is pivotally supported on a vertical central shaft protruding from the center upper surface of an inner stator, and the outer rotor supports the upper and side surfaces of the inner stator. It is supported as if it were covered. As a result, the electrical wiring must be carried out above the upper surface of the outer rotor so as not to come into contact with the outer rotor, making the structure above the outer rotor complicated, space-wise, and narrow. Various ideas have been made in this regard.

The ceiling fan described in Japanese Patent Publication No. 36-23791 has an outer rotor supported at both ends of a vertical central shaft that penetrates through the center of the inner stator, and the outer rotor extends around the inner stator. It is supported as if it were covered. As a result, although there is no particular mention in this publication, the control unit for the capacitor and the like is installed in the ceiling. In addition, as disclosed in Japanese Utility Model Publication No. 40-453, the upper surface of the outer rotor is shaped like a flat plate to form a control parts storage space, but due to the rotor being located close to the rotor, sufficient care must be taken when wiring. need,
This increases the complexity of the structure.

This proposal provides a ceiling fan that eliminates the rotating parts from the top surface of the inner stator, improving the workability of wiring and providing secure support for the outer rotor in order to simplify the structure.

In this case, a central shaft is installed vertically at the center of the lower surface of an inner stator that is suspended and supported by a support pipe, and a substantially dish-shaped outer rotor is shafted around the central shaft so as to cover the sides from the lower surface of the inner stator. supporting the inner stator and the outer rotor, covering the circumferential surfaces of the inner stator and the outer rotor with a cover having an opening formed in the center of the lower surface, fixing a plurality of blades to the center of the lower surface of the outer rotor exposed from the opening, Screw the nut that prevents the rotor from falling off onto the central shaft,
The problem can be solved by mounting a mounting member on the central shaft to which a switch or the like is mounted using the nut, and mounting a regulating plate formed with a fitting hole that engages with the nut on the mounting member. be.

In this case, a mounting member can be attached to the nut that prevents the outer rotor from coming off from the center shaft, and the mounting member can also be used as a mounting body for a regulating plate that prevents the nut from loosening, thereby stabilizing the outer rotor. The pivot support is carried out.

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

Reference numeral 1 designates a ceiling fan according to the present invention, and the ceiling fan 1 includes a support pipe 4 suspended from a ceiling 3 via a mounting device 2, and a ceiling fan main 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. It consists of a mounting fitting 9 that is installed over the collar pieces 7, 7 of the metal fitting 8, and a locking pin 11 that 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 being fixed 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. Also, if the ceiling 3 is not made of concrete, for example, if it is made of steel, wood, etc.
Various methods are possible, such as welding and screwing. 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, 1 formed in the mounting portion 13 of the mounting fitting, through which the screws 12, 12 are inserted;
Reference numeral 4 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. Hanging hanging pieces 15 are integrally bent on both sides of the mounting bracket 9. The hanging piece 15
A receiving part 16 is formed in the lower part by bending outward into a U-shape, and a locking notch 1 is formed in the inner wall of the receiving part 16.
7 is formed. The upper part of the support pipe 4 into which the locking pin 11 has been inserted is cut into the notch 17 so that both ends of the locking pin 11 are placed on the receiving part 16 so that the pipe 4 is located between the hanging pieces 15.
Hook it on. 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 the locking pin 11 is secured to the support pipe 4.
The locking pin 11 will not come out of the insertion part 10 due to vibrations, etc., and is locked in the notch 17, so that the locking pin 11 will not be removed from the mounting bracket 9 unless a force is applied to lift the support pipe 4. It does not come off, 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, elastic caps 18 are fitted onto both ends of the locking pin 11 that is caught in the notch 17.
An elastic cap 18 is almost press-fitted into the cap 7 and supported. Therefore, vibrations transmitted from the fan body 5 to the support pipe are absorbed by the elastic cap 18,
Dislodgement of locking pin 11 and locking pin 1 due to vibration
1, the support pipe 4, and the mounting bracket 9, etc., can be prevented from occurring. Although not described in this embodiment, the support pipe 4 from the mounting bracket 9 is connected in consideration of an earthquake with strong vertical shaking instead of horizontal shaking.
A locking member may be located within the notch 17 and installed between the hanging pieces 15 in order to reliably prevent it from coming off. The locking material may be made of various materials such as an elastic material, and the locking material may be attached to the mounting bracket using various structures such as elastic locking with screws.

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. The stator 2
A threaded portion 29 is formed on the outer periphery of the portion of the central shaft 28 that protrudes from the upper surface. The threaded portion 29 has a cylindrical holder 30 threaded on the upper and lower inner surfaces.
is screwed into place. At the same time that the holder 30 is screwed onto the central shaft 28, the motor 22
A disk-shaped protection plate 31 that covers the upper surface of 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 35 that is pressed by the holder 30 and is pressed against the central flat portion of the stator 20 where the winding 34 does not exist. and the stator 2
It consists of a flat cover part 37 in which a through hole 36 is formed to draw out the end of the zero 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 2.
The outside diameter is the same as or larger than that of No. 1. Most of the connections or wiring of the power supply cord (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 part is the winding 3.
4, and even if there is some slack in the wiring, the outer rotor 2
This prevents the power supply cord 39 from being damaged by contact with the power cord 1. The capacitor 40 for starting the motor 22 is fixed to the holder 30 with a screw 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 the loosening of the pipe 4 with respect to the holder 30 is prevented by the holder 30.
This is done by pressing the tip of the screw 42, which is screwed in from the outside of the upper part, against the support pipe 4. The support pipe 4, the holder 30, and the central shaft 28 are connected to each other.
A power cord and a power supply cord 39 (not shown) constitute a main pipe, and the support pipe 4 and the holder 30
The wire is passed through the center shaft 28 and pulled out onto the protection plate 31 through an insertion hole 43 formed in the center of the holder 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 a terminal may be screwed to the protection plate 31 and the connection may be made through the terminal. There are various possibilities such as.

The cover 23 is composed of an upper cover part 50 and a lower cover part 51, and is molded from synthetic resin. A through hole 52 through which the holder 30 is inserted is formed in the center of the upper cover part 50. The upper cover part 50 is fixed to the protection plate 31 with screws 53. The protection plate 3 of the upper cover part 50
A bulging portion 54 is formed in the portion corresponding to 1,
A cord storage space 55 is provided between the bulge portion 54 and the protection plate 31.
is formed. 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. A cylindrical boss portion 58 for fixing the lower cover portion 51 with a screw 57 and a rotation changeover switch 59 for appropriately switching the rotation direction of the motor 22 are attached to the inner surface of the outer peripheral portion of the upper cover portion 50. 60 and a rib 62 for holding a power supply cord 61 to the switch 59. 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 portion 51 has a donut plate shape with an opening 64 formed in the center. The lower cover portion 51 has a groove portion 6 in which the lower edge of the outer circumference of the upper cover portion 50 fits into the outer circumference of the inner surface of the lower cover portion 51.
5, and a screw 57 inserted into the cylindrical boss portion 58.
A boss 66 into which the rotary switch 59 is screwed, and a through hole 67 from which the operating section of the rotary changeover switch 59 projects are formed. The lower cover part 51 has a large number of decorative pores 68 extending radially.
A decorative donut-shaped disk 69 for closing the pore 68 is attached to the inner surface of the lower cover portion 51, which is formed with a . The disc 69 is molded from foamed resin, and not only improves the decorative effect, but also functions to absorb the sound generated by the motor 22. 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 has a substantially dish-like shape, and the rotor 21 has a bulge 71 located in the opening 64 of the lower cover part 51 and a pair of bearings 7 in the center of the rotor 21.
2 and 72 are formed. 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 press-fitted into the protruding portion. The other bearing 72 is inserted into the inner end of the accommodating cylindrical part 73, and in order to prevent the other bearing 72 from falling into the cylindrical part 73, the two bearings 72
A sleeve 75 is interposed between the inner ring portions 2 and 72. A boss 76 is protruded near the housing cylinder portion 73 at the center of the inner surface of the outer rotor 21, and the boss 76 is provided with an annular pressing plate 78 that prevents the other bearing 72 from coming off with a screw 77. Fixed.
The outer rotor 21 is prevented from coming off from the central shaft 28 by a screw portion 7 formed at the lower part of the central shaft 28.
This is done with a nut 80 screwed into the nut 9. between the stator 20 and the inner ring portion of the other bearing 72;
Sleeves 81 and 82 are interposed between the nut 80 and the inner ring portion of the one bearing 72, and gaps are formed between the outer rotor 21 and the stator 20 and between the nut 80 to the extent that they do not come into contact. ing. The sleeves 81 and 82 serve as spacers. As mentioned above, the motor 2
2 except for the bulging part 71 of the outer rotor 21 exposed from the central opening 64 of the lower cover part 51,
It is covered with the cover 23, 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 7
1 is provided with a locking portion 91 for positioning and preventing rotation, and a screw hole 92 into which the screw 90 is screwed. The mounting portion 93 of the blade 24 includes an engaging portion 94 that engages with the locking portion 91, and the screw 90.
An insertion portion is formed through which the material 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 blade 24
is attached to the lower surface of the fan main body 5, so that the main body 5 is attached to the ceiling 3.
Even if the blades 24 are mounted so close that they touch, the blades 24 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 part 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 part 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 is formed in the center of the upper surface of the reinforcing metal fitting 102 to fit into the threaded portion 79 of the central shaft 28 . The integral 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 sleeve 82 and the lower end of the sleeve 82.
The peripheral edge of the insertion hole 107 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 that is adjustably attached to the fixing screws 106, 106 of the reinforcing metal fitting 102. A fitting hole 109 is provided in the center of the regulating plate 108 to fit into the side surface of the nut 80.
is formed. If the nut 80 has a hexagonal shape, the shape of the fitting hole 109 is a substantially star-shaped hole of a hexagonal shape or a dodecagonal shape. At both ends of the regulation plate 108 are insertion holes 110 through which the screws 106 are inserted.
The insertion hole 110 is formed in the nut 8.
It is approximately crescent shaped with 0 as the 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 or to the reinforcing metal fitting 102 using screws or the like. Note that in this embodiment, the frame portion 10
A reinforcing metal fitting 102 is installed inside the reinforcing metal fitting 10.
2 also prevents rotation toward the central axis 28, but this is not particularly necessary, and the insertion hole 100 formed in the frame portion 101 may be a substantially D-shaped hole. Furthermore, the sleeve 82 that presses the outer ring portion of the bearing 72 is molded separately.
The sleeve 82 may be integrally molded on the periphery of the insertion hole 100 of the frame portion 101 or on the periphery of the insertion hole 107 of the reinforcing metal fitting 102. The reinforcing metal fittings 10
A closing plate 104 is fixed to the lower end of the closing plate 2 with screws 103, but this is not particularly limited, and various devices such as decorations and lighting devices can be attached thereto. Furthermore, if a flange is formed on the upper surface of the frame 101 to cover the bulge 71 of the outer rotor 21 to which the blades 24 are attached, the fixed portion of the blades 24 cannot be seen directly. , the appearance is better.

What is shown in 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 with a pull cord 120.
When the switch is turned off, the motor 22 is stopped. 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 speed may be controlled by making the switch 25 a multi-stage switch and appropriately switching the adjustment tap drawn out from the winding 48 of the motor 22. 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.

In the present invention, by mounting the outer rotor so as to cover the inner stator from the lower surface side, the rotating portion can be eliminated from the upper surface portion of the inner stator, and the wiring structure can be simplified. In addition, a mounting member can be attached to the nut that prevents the outer rotor from coming off, and by attaching a regulating plate to the mounting member, the nut can be prevented from loosening. It has the effect that it can be carried out reliably.

[Brief explanation of the drawing]

Figure 1 is a side view with some of the blades of the proposed ceiling fan omitted, Figure 2 is a sectional view of the same, Figure 3 is an exploded perspective view of the mounting device, Figure 4 is a sectional view of the same, and Figure 5 is the top view. Figure 6 is an exploded perspective view of the cover part and inner stator part, Figure 6 is a bottom view of the joint part between the central shaft and control box, Figure 7 is an exploded perspective view of the joint part, and Figure 8 is the electrical circuit of the proposed ceiling fan. It is a diagram. DESCRIPTION OF SYMBOLS 1...Ceiling fan, 4...Support pipe, 5...Ceiling fan main body, 20...Inner stator, 21...Outer rotor, 23...Cover, 24...Blade, 27...Control box, 28 ... Central axis, 39, 61 ... Power supply cord, 50 ... Upper cover part, 51 ... ... Lower cover part, 71 ... Bulging part (center part of lower surface of outer rotor),
80... Nut, 101... Control frame portion (mounting member), 102... Reinforcement fitting (mounting member), 108...
...Regulation plate, 109... Fitting hole, 110... Insertion hole.

Claims (1)

[Claims for Utility Model Registration] 1. A support pipe suspended from the ceiling, an inner stator attached to the pipe, and a substantially dish-shaped outer rotary shaft supported by a central shaft hanging from the stator. a cover that covers the circumferential surfaces of the inner stator and the outer rotor and has an opening at the center of the lower surface; a plurality of blades fixed to the center of the lower surface of the outer rotor exposed from the opening; A polygonal nut is screwed into the lower part of the center shaft to prevent the outer rotor from coming off the center shaft, and a mounting member for mounting a switch or the like is attached to the nut, and the above-mentioned A ceiling fan equipped with a regulating plate with a fitting hole that engages with a nut. 2 Utility model registration claim 1, in which the mounting member is constituted by a control box containing a switch, etc.
Ceiling fan mentioned in section. 3. The ceiling fan according to claim 1 or 2, wherein the insertion hole through which the screw for fixing the regulating plate is inserted is approximately crescent-shaped.