JPH07231595A - Lead wire securing mechanism for motor - Google Patents

Abstract

PURPOSE:To provide a lead wire securing mechanism for a motor suitable for automation in which the securing work of a lead wire is facilitated without damaging the magnet wire of a stator coil CONSTITUTION:A C-shaped lead wire securing member 11 having outer diameter substantially equal to that of the stator core 2 and inner diameter equal to the outer diameter of a slot 3 where a lead wire 12 is previously held by a plurality of protrusions 13 with a U-groove planted on one side in the direction of thickness is fitted along one end face of the stator core 2 and then the magnet wire 9 of the stator coil 5 is connected with the lead wire 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lead wire fixing mechanism for an electric motor for pulling a lead wire out of the magnet wire of a stator coil wound around a stator of a small electric motor.

[0002]

2. Description of the Related Art Generally, in a small electric motor having an output of 0.75 kW or less, an enamel-coated magnet wire forming a stator coil and a lead wire are tightly coupled to each other so as to have a sufficient electric and mechanical strength. However, it is connected to an external power source or the like of the small electric motor. It is important to fix the lead wire to the stator coil while maintaining the mechanical strength of the connecting portion. For example, as shown in FIG. 10, the binding coil 17 or the binding thread 18 is used to fix the stator coil. 2 is tightly bound, or JP-A-63-
In the technique disclosed in Japanese Patent No. 56145, as shown in FIG. 11, a terminal block 19 and a terminal 20 are provided in a part of the stator core 2, and a means such as coupling with a terminal receiver 21 is used.

[0003]

In the former prior art, the connecting portion between the magnet wire and the lead wire of the stator coil is covered with a thin insulating film because it involves the work of tightly binding the coil end portion with a fastening thread. The magnet wire is easily damaged, and it takes a lot of work to secure electrical insulation so that it will not be damaged.Providing the latter conventional terminal block, etc. However, there is a problem in any of the prior arts, such as an increase in the size, which is an obstacle to miniaturization, a reduction in the space factor of the stator coil, and an increase in the cost due to an increase in the material cost. In view of the above problems, the present invention does not have a risk of damaging the enamel coating of the magnet wire of the coil end portion with a simple structure, is suitable for securely and securely connecting the magnet wire and the lead wire, and has insulation reliability. This is a further improvement of the prior application technology of the present invention relating to Japanese Patent Application No. 5-114625. It is possible to omit the binding material, and to provide a lead wire fixing mechanism for an electric motor which is effective for automation of the connecting portion. It was made for the purpose of providing.

[0004]

In order to solve the above-mentioned problems, the present invention utilizes a space existing between the outer diameter of a stator core of an electric motor and the outer diameter of a stator coil to make a stator. A C-shaped plate body formed by using an electrically insulating material along one end surface of the core and fitted along one end surface of the stator core. It has a protrusion with a U groove, and the lead wire is previously fixed in the plurality of U grooves, and the magnet wire of the stator coil and the lead wire of the electric motor are electrically connected. It is a lead wire fixing mechanism of the electric motor. That is, the object of the present invention is to
As described in the claims, an elastic insulative plate-shaped member formed into a substantially C-shape, locking projections provided at both C-shaped tips of the plate-shaped member, and a thickness of the plate-shaped member. Having a plurality of U-grooved clamping projections standing upright to one surface in the vertical direction,
The U groove is formed along the outer shape of the C-shape, the outer diameter of the C-shaped plate is slightly smaller than the outer diameter of the stator core of the motor, and the inner diameter of the C-shaped plate is the stator. This is achieved by a lead wire fixing mechanism for an electric motor, characterized in that a lead wire fixing member having a size substantially equal to the outer diameter of the slot portion of the core is fitted along one end surface of the stator core.

[0005]

With the above structure, the space near the outer shape of the stator of the electric motor can be effectively utilized, and the C-shaped plate-shaped lead wire fixing member having the lead wires fixed in advance in the plurality of U-grooves is used as the stator coil. And the stator core by inserting it along one end surface of the stator core and fitting and fixing the locking projections provided at both ends of the C-shape in two opposing slots, and then connecting the magnet wire and the lead wire of the stator coil. This makes the connection work easier, no unnecessary external load is applied to the magnet wire of the stator coil when connecting to the lead wire, and there is no risk of damage to the enamel coated wire or layer short circuit.

[0006]

Embodiments of the present invention will be described with reference to the drawings. <Embodiment 1> FIG. 1 is a front view showing Embodiment 1 of a lead wire fixing mechanism for an electric motor of the present invention, and FIG. 2 is a side view thereof. 1 and 2, the stator 1 is formed by stacking a large number of stator cores 2 on each other, and each stator core 2 is a thin annular magnetic body and has a large number of radial slots 3 bored on the inner diameter side. It is a thing. The slot insulator 6 is inserted into the inner surface of the slot 3, and the enamel-coated magnet wire 9 is wound in the slot 3 a predetermined number of times to form the stator coil 5. The slot insulator 6 electrically insulates between the stator core 2 and the stator coil 5. The ends of the slot insulator 6 project from the end surface of the stator core 2 to form protrusions 6a, and both ends of the stator coil 5 protrude further outward than the protrusions 6a to form coil ends 7. ing. Coil end 7
Is shaped to prevent contact with a rotor (not shown) due to winding disorder or deformation at the end of winding the stator coil 5 around the stator core 2.

The lead wire fixing member 11 of the first embodiment is shown in FIG.
As shown in FIG. 4, it is a substantially C-shaped plate made of an insulating material such as resin, and both ends of the C-shape form circular locking projections 16. The opening angle θ between the locking projections 16 is preferably θ> 180 °. In addition, a plurality of U-grooved projections 13 projecting at right angles are provided in a radial distribution on one surface of the lead wire fixing member 11 in the thickness direction, and the U grooves are formed in a direction along the C-shaped arc. Has been done. The outer diameter of the lead wire fixing member 11 is slightly smaller than the outer diameter of the stator core 2 of the electric motor, and the inner diameter of the lead wire fixing member 11 has a dimension substantially equal to the outer diameter of the slot 3 of the stator core 2.

As shown in FIGS. 3 and 4, the U-grooved projection 13 of the present embodiment has a cylindrical outer shape and has a U-shaped groove formed in the diameter direction of the cylinder. Is not necessarily limited to a cylindrical shape.

FIG. 5 shows the lead wire fixing member 11 of the first embodiment.
The front view which shows the state which attached the lead wire to FIG. 6, FIG. 6 is sectional drawing on the AA arrow of FIG. As shown in FIG. 5, the lead wire 12 coated with cross-linked polyethylene or the like is preliminarily clamped and fixed in the U-grooved clamping protrusion 13 along the lead wire fixing member 11, and its end portion forms the connection portion 14. In order to connect with the magnet wire 9, the insulating coating is peeled off and the conductor member is exposed. In this way, the lead wire fixing member 11 in which a predetermined number of the prepared lead wires 12 are sandwiched and fixed in the U-groove protrusion 13 is mounted on the side of the stator 1 of the stator coil 5 which has been wound as described above. It is attached to the end face as shown in FIG.

That is, the stator 1 may be inserted until it abuts against the projecting portion of the slot insulator 6 on one end surface of the stator 1 and closely adhered along the end surface of the stator core 2. At this time, the locking projections 16 provided at the both ends of the C-shaped lead wire fixing member 11 are engaged between the corresponding two slots 3 and can be reliably fixed to the stator core 2.

As described above, by fitting the lead wire fixing member 11 to the stator core 2 and connecting the four ends of the magnet wire 9 to the connecting ends 14 with the four ends of the respective lead wires. Although the work of connecting the lead wire and the stator core 2 is completed, as shown in FIGS. 1 and 2, a plurality of lead wires are gathered in one place along the outer circumference of the coil end 7 and the binding band 15 is used. May be tied together. The lead wire 12 and the magnet wire 9 are generally connected by soldering.

FIG. 7 is a connection diagram of this embodiment. The stator coil 5 is composed of a main coil 5a and an auxiliary coil 5b. Both ends of the main coil 5a and one end of the auxiliary coil 5b are directly connected to each other. In addition, the other end of the auxiliary coil 5b has a capacitor 8
Is connected to the power source 4 via four lead wires 12 drawn out by a magnet wire 9 coated with enamel.

<Second Embodiment> FIG. 8 is a front view of a lead wire fixing member 11 'according to a second embodiment of the present invention, and FIG. 9 is a side view of the same. As shown, this embodiment is an embodiment in which a U-groove holding protrusion 13 of the first embodiment is sandwiched between arc-shaped U-groove holding protrusions 13 ′, and adjacent U-groove holding protrusions are provided. U-grooved clamping projection 13 'formed in a circular arc shape in which the projection 13 closely contacts with the C-shaped outer shape of the lead wire fixing member 11'
It should be understood that the U-groove holding protrusion 13 shown in the first embodiment is mixed. As a result, the U-grooved clamping projection 13 'formed in an arc shape with an appropriate length is provided with the lead wire 1 drawn out along the C-shaped outer shape of the lead wire fixing member 11'.
It becomes easy to hold and fix 2 stably, and the lead wires 12 are connected to each other by the holding projection 13 with U groove. The number and arrangement of the U-groove holding protrusions 13 and the U-groove holding protrusions 13 ′ should be arbitrarily set depending on the arrangement conditions of the lead wires 12. The lead wire 12 can be attached to the lead wire fixing member 11 ′ of the second embodiment according to FIG. 5 of the first embodiment.

According to the above-described first and second embodiments, the lead wire fixing member 11 in which the lead wire 12 is previously held and fixed in the U-groove holding protrusion 13 is closely fitted to one end surface of the stator core 2. After that, the magnet wire 9 and the lead wire 12 pulled out from the stator coil 5 are securely and securely connected and fixed on the lead wire fixing member 11 to fix the lead wire of the motor, which is effective for promoting automation including connection work. Mechanism can be provided, as in the prior art, the stator core 2
There is no need to provide a terminal block or terminal receiver on the outside of the coil, and the connecting work does not take time and the lead wire is not bound to the coil end 7 using a binding material, so the risk of damaging the enamel coating of the magnet wire 9 is avoided. be able to.

[0015]

According to the lead wire fixing mechanism of the electric motor of the present invention, it is not necessary to bind the lead wire to the coil end 7 when fixing the lead wire, so that the workability is remarkably improved and it is effective for the automatic promotion of the work. In addition, since unnecessary external force is not applied to the magnet wire of the stator coil to damage the enamel coating of the magnet wire 9, it is possible to prevent a layer short circuit and burnout of the electric motor due to this, and further Since the lead wire fixing mechanism of the present invention does not increase the occupied volume near the stator, it is effective for downsizing the electric motor.

[Brief description of drawings]

FIG. 1 is a first embodiment of a lead wire fixing mechanism for an electric motor according to the present invention.
FIG.

FIG. 2 is a first embodiment of a lead wire fixing mechanism for an electric motor according to the present invention.
It is the side view which showed a part by section.

FIG. 3 is a front view of the lead wire fixing member according to the first embodiment of the present invention.

FIG. 4 is a side view of the lead wire fixing member according to the first embodiment of the present invention.

FIG. 5 is a front view showing a state in which a lead wire is attached to the lead wire fixing member according to the first embodiment of the present invention.

6 is a sectional view taken along the line AA of FIG.

FIG. 7 is a wiring diagram of a lead wire fixing mechanism of an electric motor according to an embodiment of the present invention.

FIG. 8 is a front view of a lead wire fixing member according to a second embodiment of the present invention.

FIG. 9 is a side view of a lead wire fixing member according to a second embodiment of the present invention.

FIG. 10 is a view showing a lead wire fixing mechanism of a conventional electric motor.

FIG. 11 is a view showing a lead wire fixing mechanism of another conventional electric motor.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Stator 2 ... Stator core 3 ... Slot 4 ... Power supply 5 ... Stator coil 5a ... Main coil 5b ... Auxiliary coil 6 ... Slot insulator 7 ... Coil end 8 ... Capacitor 9 ... Magnet wire 10 ... End part 11, 11 '... Lead wire fixing member 12 ... Lead wire 13, 13' ... U
Grooved clamping projection 14 ... Connection part 15 ... Binding band 16 ... Locking protrusion 17 ... Binding band 18 ... Binding thread 19 ... Terminal block 20 ... Terminal 21 ... Terminal receiver

Claims (3)

[Claims] 1. A substantially C-shaped elastic insulating plate-shaped body, locking projections provided at both C-shaped tips of the plate-shaped body, and a right angle to one surface in the thickness direction of the plate-shaped body. And a plurality of U-grooved clamping projections that are erected upright, the U-groove is formed along the outer shape of the C-shape, and the outer diameter of the C-shaped plate is the outer diameter of the stator core of the electric motor. A lead wire fixing member having a size slightly smaller than that of the C-shaped plate and having an inner diameter substantially equal to the outer diameter of the slot portion of the stator core is fitted along one end surface of the stator core. A lead wire fixing mechanism for electric motors. 2. The lead wire fixing mechanism for an electric motor according to claim 1, wherein the plurality of U-grooved sandwiching protrusions are formed in a cylindrical shape and have U grooves in a diameter direction of the cylinder. 3. A plurality of U-grooved clamping projections according to claim 1, wherein a plurality of arcuate U-grooved clamping projections formed along the outer shape of the C-shape, and a plurality of cylindrical-shaped clamping projections according to claim 2. A lead wire fixing mechanism for an electric motor, which is configured by a combination with a U-groove holding protrusion.