JP6296818B2 - Electric motor and ventilation fan - Google Patents

Description

  The present invention relates to an electric motor and a ventilation fan.

  2. Description of the Related Art Conventionally, as an electric motor for a blower such as a ceiling-mounted type ventilation fan, a configuration in which an outer shell is configured by a bracket having a frame and a notch portion, and a lead wire is drawn out from the bracket side is often employed. In the blower having such a configuration, an electric motor is mounted from the inner side to an electric motor mounting hole provided in a top plate of a box-shaped main body frame, and a lead wire is routed to a notch portion of the bracket. Further, a terminal block for supplying power is provided inside the blower, and the lead wire of the electric motor is also drawn inside the main body frame. As described above, in order to draw the lead wire of the electric motor into the inside of the main body frame, a lead wire insertion hole through which the lead wire of the electric motor is passed is often provided in the top plate of the blower.

  In such a blower, a packing material is filled so as to fill a gap formed between the notch portion of the bracket and the top plate, and a packing material is filled in the lead portion of the lead wire of the bracket, thereby taking measures such as waterproofing. I am trying.

  Conventionally, there has been a ceiling ventilation fan in which a lead wire cover for covering and protecting the lead wire of an electric motor is provided on the outer peripheral portion of the main body box (for example, Patent Document 1).

JP-A-8-219520 ([0017], [0018], FIG. 1)

  However, the conventional blower described above needs to be fitted with a packing material, and the ceiling ventilation fan described in Patent Document 1 is used to fill a gap formed in the connecting portion between the lead wire cover and the main body box. For example, it is necessary to pack packing material. Therefore, the above-described conventional blower and the ceiling ventilation fan described in Patent Document 1 have a problem that the troublesome work of packing the packing material is necessary, the assemblability is poor, and the number of parts increases as much as the packing material. .

  In addition, the above-described conventional blower and the ceiling ventilation fan described in Patent Document 1 may be in contact with the lead wire and the blade of the blower, or the wind and moisture may leak from the gap depending on the packing material mounting method. In some cases, the performance deteriorated.

  In addition, if the blower is installed in a bathroom, etc., the blower sucks in moist air from the bathroom, etc., and this sucked air leaks into the ceiling, causing condensation and mold in the ceiling, In some cases, the service life was shortened.

  The present invention has been made against the background of the above-described problems, and an object of the present invention is to obtain an electric motor and a ventilation fan with good assemblability.

An electric motor according to the present invention includes a frame having an opening surface, a cover that covers the opening surface of the frame, a stator provided inside the frame and having a winding, and a lead wire that supplies power to the winding. A bracket provided between the frame and the cover, the bracket covering a portion exposed from the frame, and the bracket is a bracket flange portion sandwiched between the frame and the cover; A protrusion protruding outward from the outer surface of the bracket, and the protrusion is provided with a notch into which the lead wire is inserted.

  A ventilation fan according to the present invention includes the electric motor of the present invention, a main body to which the electric motor is attached, and a top plate constituting a part of the outer surface of the main body, and the lead wire is inserted into the top plate. Lead wire insertion holes are provided.

  According to the present invention, since the projecting portion that projects outward from the outer surface of the bracket is provided with a notch into which the lead wire is inserted, an electric motor and a ventilation fan with good assemblability can be obtained.

1 is a side view of an electric motor 100 according to an embodiment of the present invention. It is a top view of bracket 6 of electric motor 100 concerning an embodiment of the invention. It is sectional drawing which shows the ventilation fan 200 to which the electric motor 100 which concerns on embodiment of this invention is attached. It is a figure which shows the top plate 21a of the ventilation fan 200 to which the electric motor 100 which concerns on embodiment of this invention is attached, and is a top view of FIG. It is sectional drawing which shows the ventilation fan 200 with which the electric motor 100 which concerns on embodiment of this invention was attached. It is a figure which shows the top plate 21a of the ventilation fan 200 with which the electric motor 100 which concerns on embodiment of this invention was attached, and is a top view of FIG. It is sectional drawing which shows the state in which the lead wire 9 of the electric motor 100 which concerns on embodiment of this invention was inserted in the ventilation fan 200. FIG.

  Below, the electric motor 100 and the ventilation fan 200 which concern on embodiment of this invention are demonstrated based on drawing. FIG. 1 is a side view of an electric motor 100 according to an embodiment of the present invention. FIG. 2 is a plan view of bracket 6 of electric motor 100 according to the embodiment of the present invention.

  As shown in FIG. 1, the electric motor 100 includes a stator 1, a frame 2, a shaft 3, a rotor 4, a bearing 5, and a cover 7. Hereinafter, each configuration of the electric motor 100 will be described.

  The stator 1 is a member configured by winding a winding 11 around an iron core. The frame 2 is a member constituting a part of the outer shell of the electric motor 100, and has an opening surface 2A and a frame flange portion 2a. The frame flange portion 2a has a mounting hole (not shown). Inside the frame 2, members such as the stator 1 are provided through the opening surface 2A. A bracket 6 is provided on the opening surface 2 </ b> A side of the frame 2.

  The shaft 3 is connected to the rotor 4 and the bearing 5, and is a member provided on the inner side (center side) of the electric motor 100 than the stator 1. The cover 7 is a member constituting a part of the outer shell of the electric motor 100, and has a cover flange portion 7a. The cover 7 is attached to the frame 2 so as to cover the opening surface 2A of the frame 2. The cover flange portion 7a has a mounting hole (not shown).

  As shown in FIGS. 1 and 2, the bracket 6 is, for example, a resinous member formed in a concave shape when viewed from the side, and includes a bracket flange portion 6 a and a protruding portion 6 b. The protrusion 6b is, for example, a U-shaped member. The bracket flange portion 6a and the protruding portion 6b are provided so as to protrude from different outer surfaces of the bracket 6, respectively. The bracket 6 is located between the frame 2 and the cover 7 in a state where the electric motor 100 is assembled.

  A mounting hole 6a1 is formed in the bracket flange portion 6a. The attachment hole 6a1 is a hole used when the electric motor 100 is attached to the ventilation fan 200. For example, a fixing member such as a screw is inserted into the mounting hole 6a1.

  With the frame flange portion 2a, the bracket flange portion 6a, and the cover flange portion 7a provided so as to be positioned on the same plane, a member such as a screw (not shown) is used to attach the frame 2, the bracket 6, and the cover 7 to each other. Fix so that they do not come apart from each other. In this way, the bracket 6 covers the exposed part of the stator 1 provided inside the frame 2. Further, the end of the bracket 6 is sandwiched between the frame 2 and the cover 7.

  A lead wire 9 for supplying power to the winding 11 is connected to the winding 11 of the stator 1. The lead wire 9 is pulled out from the cover 7 and routed to the protruding portion 6 b of the bracket 6. A notch 6b1 is provided at the tip of the protruding portion 6b. The notch 6b1 is a space into which the lead wire 9 is inserted. By providing the notch 6b1, an inner surface 6b2 is formed in the protrusion 6b, and the lead wire 9 is guided to the protrusion 6b. When the lead wire 9 is inserted into the notch 6b1, the inner surface 6b2 of the protruding portion 6b contacts the outer surface of the lead wire 9, and the lead wire 9 is sandwiched and fixed by the protruding portion 6b. In this way, workability when handling the electric motor 100 is improved.

FIG. 3 is a cross-sectional view showing a ventilation fan 200 to which the electric motor 100 according to the embodiment of the present invention is attached.
4 is a view showing the top plate 21a of the ventilation fan 200 to which the electric motor 100 according to the embodiment of the present invention is attached, and is a plan view of FIG.

  As shown in FIG. 3, the ventilation fan 200 is a duct ventilation fan provided with blades 13, and is provided, for example, on the ceiling of the living room 50. The outline of the ventilation fan 200 is configured by a main body 21. The main body 21 is composed of, for example, a box-shaped member, and includes a top plate 21a, an indoor panel 21b, and a duct connection port 22. A terminal block (not shown) for fixing the lead wire 9 is provided inside the main body 21.

  The top plate 21a is a member constituting the top surface of the main body 21, and is partially opened so that the electric motor 100 can be attached. The indoor panel 21 b is a member provided on the indoor side of the ceiling of the living room 50 in the main body 21. The indoor panel 21 b is detachably attached to the main body 21. For this reason, the indoor panel 21b can be removed from the main body 21, and the maintenance of the blades 13 and the like provided in the main body 21 can be easily performed. The indoor panel 21b is provided with a suction port 21b1 through which air in the living room 50 passes. The duct connection port 22 is an opening for connecting a piped duct (not shown), and is provided on the side surface of the main body 21.

  As shown in FIG. 4, the top plate 21a is provided with a lead wire insertion hole 21a1 and an electric motor insertion hole 21a2. The lead wire insertion hole 21a1 is an opening into which the lead wire 9 of the electric motor 100 is inserted. The electric motor insertion hole 21 a 2 is an opening for attaching the electric motor 100.

FIG. 5 is a cross-sectional view showing a ventilation fan 200 to which the electric motor 100 according to the embodiment of the present invention is attached.
6 is a view showing the top plate 21a of the ventilation fan 200 to which the electric motor 100 according to the embodiment of the present invention is attached, and is a top view of FIG.
FIG. 7 is a cross-sectional view showing a state where the lead wire 9 of the electric motor 100 according to the embodiment of the present invention is inserted into the ventilation fan 200.

  As shown in FIG. 5, the electric motor 100 is attached to the top plate 21 a so that the tip of the shaft 3 faces the room 50 side. In a state where the electric motor 100 is attached to the top plate 21a, a part of the electric motor 100 (for example, the cover 7) is exposed. In addition, the arrow A in FIG. 5 has shown the flow of air.

  As shown in FIG. 6, when the ventilation fan 200 is viewed in plan with the electric motor 100 attached to the top plate 21a, the positional relationship between the members (parts) is as shown in (1) and (2) below. Yes.

(1) The protrusion 6b is located outside the periphery of the lead wire insertion hole 21a1. For this reason, in a state where the electric motor 100 is attached to the top plate 21a, the electric motor 100 is restricted from moving in the direction opposite to the living room 50 (upward in the drawing in FIG. 5).

(2) The notch 6b1 is provided inside the edge of the lead wire insertion hole 21a1. For this reason, the lead wire 9 can be inserted into the notch 6b1 and the lead wire insertion hole 21a1.

  As shown in FIG. 7, the lead wire 9 is inserted into the lead wire insertion hole 21 a 1 and the notch 6 b 1 with the electric motor 100 attached to the top plate 21 a, and the tip of the lead wire 9 is held in the ventilation fan 200. .

  Next, the flow of wind during the operation of the ventilation fan 200 will be described. When the operation of the ventilation fan 200 is started, the air in the living room 50 is sucked into the ventilation fan 200 through the indoor panel 21b, flows through the duct connection port 22 and the duct, and is discharged to the outside.

  As described above, the electric motor 100 according to the present embodiment includes the frame 2 having the opening surface 2 </ b> A, the cover 7 covering the opening surface 2 </ b> A of the frame 2, and the stator having the winding 11 provided inside the frame 2. 1, a lead wire 9 that supplies power to the winding 11, and a bracket 6 provided between the frame 2 and the cover 7, and the bracket 6 protrudes outward from the outer surface of the bracket 6. 6b. The protrusion 6b is provided with a notch 6b1 into which the lead wire 9 is inserted. For this reason, the lead wire 9 is fixed to the protrusion 6b. Therefore, for example, when the motor 100 is attached to the top plate 21a and the ventilation fan 200 is assembled, flapping of the lead wire 9 can be suppressed without requiring a member such as a packing material. Thus, the electric motor 100 with good assemblability can be obtained.

  Further, since the lead wire 9 is fixed to the protruding portion 6b, when maintaining the electric motor 100 or assembling the ventilation fan 200, the lead wire 9 can be easily aligned with the lead wire insertion hole 21a1 of the top plate 21a. 9 is easy to insert. In addition, since the lead wire 9 is fixed to the protruding portion 6b, the electric motor 100 is easy to handle, and the work can be performed without the lead wire 9 being bitten.

  Further, the lead wire 9 is disposed in the notch 6b1 and the lead wire insertion hole 21a1 without a gap. For this reason, the lead wire 9 can be easily wound around the top plate 21a, and the contact between the lead wire 9 and the blade 13 can be suppressed. Furthermore, the space of the lead wire insertion hole 21a1 is completely covered with the protruding portion 6b. Thus, by comprising so that a clearance may be eliminated, the indoor air introduce | transduced in the main body 21 does not leak to the ceiling back etc., especially when the ventilation fan 200 is installed in a bathroom etc., in the bathroom. Moisture or the like does not enter the back of the ceiling, and it is possible to suppress the occurrence of condensation on the back of the ceiling. In this way, it is possible to obtain the electric motor 100 with stable quality without wind leakage and moisture leakage.

  The lead wire 9 is wound around the top plate 21a and has a structure with a sufficient gap from the blades 13. Here, since the lead wire 9 is fixed by the protruding portion 6b, the lead wire 9 is held so as not to be displaced even when a force such as pulling is applied to the lead wire 9. For this reason, the lead wire 9 does not apply an abnormal force to the internal joint portion of the electric motor 100 and does not break. Thus, it can suppress that the lead wire 9 contacts the blade | wing 13, can obtain the electric motor 100 without a wind leak and moisture leak, and can suppress the deterioration of a house lifetime.

  In this embodiment, an example in which the ventilation fan 200 is a duct ventilation fan has been described. However, the present invention may be applied to a ventilation fan attached to a pipe or a wooden frame provided on a wall, or a ventilation fan attached to the interior of a ceiling or a floor. The same effect as the embodiment can be obtained.

  1 Stator, 2 frame, 2A opening surface, 2a frame flange, 3 shaft, 4 rotor, 5 bearing, 6 bracket, 6a bracket flange, 6a1 mounting hole, 6b protrusion, 6b1 notch, 6b2 inner surface, 7 cover, 7a Cover flange, 9 Lead wire, 11 Winding, 13 Blades, 21 Body, 21a Top plate, 21a1 Lead wire insertion hole, 21a2 Electric motor insertion hole, 21b Indoor panel, 21b1 Suction port, 22 Duct connection port, 50 Living room, 100 Electric motor, 200 ventilation fan, A arrow.

Claims (5)

A frame having an opening surface;
A cover covering the opening surface of the frame;
A stator provided inside the frame and having a winding;
Lead wires for supplying power to the windings;
The stator covers a portion exposed from the frame, and includes a bracket provided between the frame and the cover,
The bracket is
A bracket flange portion sandwiched between the frame and the cover;
A protruding portion protruding outward from the outer surface of the bracket,
The electric motor, wherein the protrusion is provided with a notch into which the lead wire is inserted. The electric motor according to claim 1, wherein the notch has a U shape. 3. The electric motor according to claim 1, wherein an inner surface of the protruding portion and an outer surface of the lead wire are in contact with each other in a state where the lead wire is inserted into the notch. The electric motor according to any one of claims 1 to 3,
A main body to which the electric motor is attached;
Comprising a top plate constituting a part of the outer surface of the main body,
The top plate is provided with a lead wire insertion hole into which the lead wire is inserted. In a state where the main body is viewed in plan view,
The ventilation fan according to claim 4, wherein the notch is provided inside an edge of the lead wire insertion hole.

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