JP3744652B2 - Electric motor - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electric motor provided with lead wire protection means such as a power supply line.
[0002]
[Prior art]
Conventionally, as a means for pulling out a lead wire such as a power line of an electric motor, as shown in a side view of the electric motor in FIG. 5, for example, the lead wire 7 is drawn out from an arbitrary gap (not shown) in the rear bracket 2 of the electric motor. These are fixed by the lead wire holding means 16 and connected to the contact 17 of the connector.
[0003]
However, in such a drawing means, since the lead wire 7 is not fixed firmly in the vicinity of the gap, the lead wire 7 is rubbed and cut at the edge of the gap in a plurality of steps in the assembly work of the electric motor, or in the electric motor of the electric fan The head sometimes rubs for some reason during the swing motion, leading to fatigue cutting.
[0004]
[Problems to be solved by the invention]
Accordingly, the present invention provides an electric motor provided with means for holding and protecting a lead wire by using a positioning hole generated in the manufacturing process of the electric motor or a member required in the manufacturing process in order to solve the above problem. It is intended.
[0005]
[Means for Solving the Problems]
[0007]
Electric motor according to claim 1 of the present invention is formed in rear bracket of the motor, a rear hole leads of the stator is drawn, communicates with said rear bore, and a positioning hole formed at the time of press working, the rear hole And a protective ring having elasticity that covers the periphery of the protective ring. The protective ring is provided with a notch, the opening size of the notch is smaller than the diameter of the lead wire, and the notch of the protective ring is provided with a taper. The outer part of the part is engaged with the inner side of the positioning hole.
[0008]
In this way, the outer portion of the notch taper portion of the protective ring is engaged with the portion located in the rear hole which is the drilled hole of the positioning hole provided at the time of pressing the rear bracket, so a hole for engagement is newly provided. There is no need. In addition to protecting the lead wire from abrasion due to friction with the edge portion, the lead wire can be easily inserted from the tapered portion of the notch portion of the protective ring, and after insertion, the outer portion of the tapered portion is notched. Therefore, the lead wire can be reliably prevented from coming out of the protective ring through the opening of the notch, and can be prevented from being rubbed against the edge and being subjected to fatigue cutting even during assembly of the electric motor.
[0011]
The electric motor according to claim 2 of the present invention covers a positioning hole formed at the time of pressing the rear bracket of the electric motor, a mounting plate for attaching the swing mechanism to the electric motor, and a periphery of the positioning hole formed in the mounting plate. A wiring processing portion having elasticity, a cutout portion is provided in the wiring processing portion, an opening size of the cutout portion is formed smaller than a diameter of the lead wire, and a taper portion is provided in the cutout portion of the wiring processing portion. The outer portion is engaged with the inside of the positioning hole.
[0012]
In this way, in the electric motor for the electric fan, there is no special protection ring, and there is no elastic ring in the portion located in the rear hole, which is a drilled mark of the positioning hole provided at the time of pressing the rear bracket on the mounting plate such as a resin plate. Since the wiring processing portion having the taper portion is formed and the tapered portion is provided in the notch portion, all existing members and parts can be used, which is extremely economical and efficient.
[0013]
In addition to protecting the lead wire from abrasion due to friction with the edge portion, the lead wire can be easily inserted from the taper portion of the notch portion of the wiring processing portion. Because it fits into the notch, the lead wire is surely prevented from coming out of the wiring processing part from the opening of the notch, and it is rubbed against the edge even during assembly of the motor or during swinging operation of the electric motor of the fan Fatigue cutting can be prevented.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an example of an electric motor for a fan, and is a side sectional view thereof. In the figure, 1 is a front bracket of a casing of an electric motor, 2 is a rear bracket, 3 is a connecting member, and 4 is a motor prop spindle, which supports the entire motor. Reference numeral 5 denotes a stator, which is press-fitted into the front bracket 1. Reference numeral 6 denotes a rear hole drilled in the rear bracket 2, and 7 denotes a lead wire of the stator winding, which is drawn out from the rear hole 6. 8 is an edge part of the rear hole 6, 9 is a rotation case of a gear case and a 10 swing mechanism. The swing mechanism is attached to the electric motor by a mounting plate (not shown) such as a resin plate.
[0015]
When the rotating shaft 10 of the swing mechanism is in the illustrated position, the electric motor for the electric fan transmits the rotation of the motor as the rotational force of the rotating shaft 10 by the action of the worm gear and the rotating gear in the gear case 9. The rotating shaft 10 is rotated by the rotation of the ball bearing pressed against the shaft wall by the spring pressure. The rotational force causes the motor prop spindle 4 to rotate by a link mechanism (not shown) to cause the fan to swing.
[0016]
When the rotating shaft 10 is lifted upward, the engagement between the worm gear and the rotating gear in the gear case 9 is disengaged, and no rotational force is transmitted to the rotating shaft 10, and the swing motion of the electric fan is stopped.
[0017]
FIG. 2 is a rear sectional view of the electric motor to which the swing mechanism of FIG. 1 is attached, and shows a state in which a protective ring 11 is provided on the edge portion 8 of the rear hole 6. Next, the reason why the protective ring 11 is provided will be described with reference to FIGS.
[0018]
FIG. 3 is a rear side view of the electric motor with the swing mechanism removed, and a rear hole 6 is formed in the rear surface of the rear bracket 2 of the casing of the electric motor. The rear bracket 2 is usually formed by squeezing a single iron plate into a cylindrical shape little by little by a plurality of steps of press working. For this purpose, it is necessary to accurately maintain the positioning in each step. In the figure, the notch 14 and the hole 15 at the center upper part of the rear hole 6 are the drilled marks of the positioning holes during the press working.
[0019]
If the rear hole 6 of the rear surface of the rear bracket 2 having such a structure is used as a lead-out port for a lead wire such as a power line of an electric motor as described with reference to FIG. Since it is not firmly fixed, the lead wire may be rubbed and cut by the edge 8 of the rear hole 6 in a plurality of steps in the assembly process of the electric motor, or the electric motor of the electric fan may be rubbed due to some cause during the swinging operation and fatigue cut. There is.
[0020]
Therefore, in the present invention, in order to avoid these inconveniences, a protective ring 11 is provided at the edge portion 8 of the rear hole 6, and details thereof will be described with reference to FIG. FIG. 4 is a rear side view of the electric motor from which the swing mechanism is removed, as in FIG. 3, and what is drawn with a broken line represents a part of the inside of the electric motor.
[0021]
In FIG. 4, a protective ring 11 is provided in a rear hole 6 drilled in the rear surface of the rear bracket 2 of the casing of the electric motor. This makes it possible to protect the lead wire from abrasion due to friction with the edge portion 8. And the V-shaped taper part 12 is formed in the notch part provided in the upper part of the protective ring 11. The V-shaped opening dimension of the notch is formed smaller than the lead wire diameter. And it attaches so that the outer side part 13 of the taper part 12 may be fitted inside the notch part 14 of the center upper part of the rear hole 6 which is a perforation mark of the positioning hole provided at the time of the press work of the rear bracket 2.
[0022]
As a result, in addition to protecting the lead wire from abrasion due to friction with the edge portion 8, the lead wire can be easily inserted because the opening is provided above the V-shaped taper portion 12. After that, the opening size is formed smaller than the diameter of the lead wire, and the outer portion of the taper portion 12 is fitted into the notch portion 14, so that the lead wire may come out of the protective ring 11 from the upper opening. In addition, it is possible to prevent fatigue cutting by rubbing against the edge even during the swinging operation of the motor assembly work or the electric motor of the electric fan.
[0023]
The notch portion 14 of the rear hole 6 into which the V-shaped taper portion 12 of the protective ring 11 is fitted uses a positioning hole provided when the rear bracket 2 is pressed, so that it is necessary to drill again. Therefore, the manufacturing process can be omitted.
[0024]
The above description is for the case where the protective ring 11 is attached to the rear hole 6 of the rear bracket 2, but in the electric motor for a fan in which the swing mechanism is attached to the electric motor by a mounting plate such as a resin plate. A mounting plate such as a resin plate without providing a protective ring, and a V-shaped taper portion 12 at a portion located in the rear hole 6 which is a perforation mark of a positioning hole provided when the rear bracket 2 is pressed. A corresponding wiring processing portion may be formed, and a lead wire may be inserted therein to engage the outer portion of the taper portion with the positioning hole to protect the lead wire. According to this means, since all existing members and parts can be used, it is extremely economical and efficient.
[0025]
【The invention's effect】
As described above, in the electric motor of the present invention, the outer portion of the notch portion tapered portion of the protective ring is engaged with the positioning hole provided at the time of pressing the rear bracket, so it is necessary to provide a hole for engagement again. Absent. In addition to protecting the lead wire from abrasion due to friction with the edge portion, the lead wire can also be easily inserted from the tapered portion of the notch portion of the protective ring, and after insertion, the outer portion of the tapered portion is positioned. Since the lead wire is fitted into the hole, it is possible to reliably prevent the lead wire from coming out of the protective ring through the opening of the notch, and to prevent the lead wire from being rubbed against the edge and being subjected to fatigue cutting even during the assembly operation of the electric motor.
[0026]
And in electric motors for electric fans, etc., the protective ring is not provided, and the outer side of the taper part of the wiring processing part formed on the mounting plate such as a resin plate is engaged with the positioning hole provided when the rear bracket is pressed. Therefore, since all existing members and parts can be used, it is extremely economical and efficient. In addition, it is easy to insert the lead wire from the opening of the notch, and it is possible to prevent the inserted lead wire from coming out of the notch once. Even during the swinging motion, the lead wire can be protected from abrasion with the edge portion.
[Brief description of the drawings]
FIG. 1 is a side sectional view of an electric motor equipped with a swing mechanism for a fan.
FIG. 2 is a rear sectional view of an electric motor to which a swing mechanism is attached.
FIG. 3 is a rear side view of the electric motor.
FIG. 4 is a rear side view of an electric motor to which a protection ring is attached.
FIG. 5 is a side view of an electric motor.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Front bracket 2 Rear bracket 3 Connecting member 4 Motor prop spindle 5 Stator 6 Rear hole 7 Lead wire 8 Rear hole edge part 9 Gear case 10 Swing mechanism pivot shaft 11 Protective ring 12 Taper part 13 Outside part of taper part 14 Notch 14
15 Positioning hole 16 Lead wire holding means 17 Connector contact

Claims (2)

  A rear hole formed in the rear bracket of the electric motor, from which the lead wire of the stator is drawn, a positioning hole formed during press working, and a protective ring that covers the periphery of the rear hole and has elasticity The protective ring is provided with a notch, the opening size of the notch is made smaller than the diameter of the lead wire, a taper is provided at the notch of the protective ring, and the outer side of the taper is engaged with the inside of the positioning hole. An electric motor characterized by being combined.   A positioning hole formed at the time of pressing the rear bracket of the electric motor, a mounting plate for attaching a swing mechanism to the electric motor, and a wiring processing unit formed on the mounting plate and covering the periphery of the positioning hole and having elasticity, A notch is provided in the wiring processing part, the opening size of the notch is made smaller than the lead wire diameter, a taper is provided in the notch of the wiring processing part, and the outside of the taper is engaged with the inside of the positioning hole. An electric motor characterized by

Images