JPS5847816Y2 - winding machine - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a winding machine for manufacturing a coil used in a motor armature, and is particularly directed to making it possible to obtain a coil without deformation such as sag.

Conventionally, for example, a coil 1 as shown in FIG. 1 has been used in the armature of a flat type brushless DC motor.

As shown in the figure, this coil 1 is wound in a substantially triangular shape, and has an inner diameter hole 1a formed therein and an end 1b extending out.

As shown in FIG. 2, the conducting wire 2 for forming the coil 1 is made of a core wire 3 made of copper or the like, an insulating film 4 made of enamel or the like applied to the surface, and an adhesive film 5 further applied thereon. A self-fusing conductor is used.

An automatic winding machine is used when winding such a conducting wire 2 to make a coil 1.

Conventional winding machines of this type can be divided into two types depending on the winding method.

One of them is a type in which a nozzle from which a conducting wire 2 is led out is rotated around a fixed bobbin, and is generally called a flyer one-type type.

The other type is one in which the nozzle is fixed and the bobbin is rotated, and is generally called the bobbin method.

This invention relates to a winding machine with a flyer type.
The main parts of the conventional example are shown in FIGS. 3 and 4.

In FIG. 3, a bobbin 6 with flanges 6 a , 6 b is fixed to a support 7 by a tightening nut 8 .

Further, a fryer 10 is fixed to the tip of the cylindrical rotating shaft 9, and a nozzle 11 is provided at the tip of the fryer 10.

The conducting wire 2 is pulled out from a spool (not shown) on which the conducting wire 2 is wound, which is provided in this winding machine, through the rotating shaft 9, and further stretched along the flyer 10.
It is led out from the nozzle 11.

The opening end surface 11a of the nozzle 11 is formed into a curved surface as shown in the figure, and the conducting wire 2 is once bent at this opening end surface 11a and then wound around the bobbin 6.

When the rotating shaft 9 rotates in the illustrated state, the nozzle 11 rotates around the bobbin 6, thereby winding the conducting wire 2 around the bobbin 6 to form the coil 1.

FIG. 4 shows a case where the bobbin 6 and flanges 6 a and 6 b are separate bodies, and in this case, the inner diameter hole 1 a of the coil 1 in FIG.
A coil in which the bobbin 6 is inserted can be obtained.

Therefore, in the conventional winding machine described above, the nozzle 11
The conducting wire 2 led out from the opening end face 11a is bent at an acute angle and then wound around the bobbin 6.

Therefore, stress due to bending remains in the conducting wire 2 that has passed through the open end surface 11a, and the conducting wire 2 with this bending stress remaining is wound around the bobbin 6.

Therefore, as shown in FIG. 5, warpage 1C occurs in the manufactured coil 1 due to the residual stress.

This warpage 1C appears more markedly as the conductor 2 becomes thicker.

In a flat brushless motor, the magnet of the rotor is arranged with a predetermined gap spaced from the surface of the coil 1 .

The air gap is required to be made as small as possible in order to reduce magnetic resistance and increase motor efficiency.

Therefore, when the coil 1 having the warp 1C as shown in FIG. 5 is used in a flat brushless motor, if the gap is small, the warp 1C will come into contact with the magnet, impairing the function of the motor.

Furthermore, if the magnet and the warp 1C are prevented from coming into contact with each other, the gap will increase and the efficiency of the motor will decrease.

The present invention is intended to solve the above problems, and embodiments of the present invention will be described below with reference to the drawings.

FIG. 6 shows the main parts of a winding machine according to a first embodiment of the present invention.

In this embodiment, a guide member 12 is provided at the tip of the fryer 10, and a guide 13 provided on the guide member 12 allows the conductor 2 to be bent only at an angle θ in the opposite direction to the bending direction at the opening end surface 11a. I try to bend it.

According to the above configuration, the bending stress generated in the conducting wire 2 at the opening end surface 11a can be canceled by bending the guide 13 in the opposite direction.

FIG. 7 shows a second embodiment, in which a rotating nozzle 14 and a rotating guide 15 are used.

The rotating nozzle 14 and the rotating guide 15 are formed from a rotatably supported roller as shown in the figure.

In this embodiment, after the conductive wire 2 led out from the fryer 10 is bent by the rotating nozzle 14, the rotating force field 15
Accordingly, the material is bent by an angle θ in a direction opposite to the above-mentioned bending direction.

FIG. 8 shows a third embodiment, in which a mounting member 16 is provided at the tip of the fryer 10 so as to be rotatable in the direction of arrow a by a shaft 17, and a rotary nozzle 14 is attached to this mounting member 16.
and the rotation guide 15 is installed in the positional relationship shown in FIG.

According to the above configuration, when the fryer 10 rotates in the direction indicated by the arrow, the force applied to the conducting wire 2 changes based on the shape of the bobbin 6, etc., and the mounting member 16 uses the shaft 17 as a fulcrum in response to the change in this force. Since the swinging motion is performed as follows, the change in the force mentioned above is absorbed.

This can prevent excessive force from being applied to the conducting wire 2 or the formed coil 8.

Therefore, the coil 8 can be wound uniformly without winding unevenness or the like.

Furthermore, if a large force is applied to the conductive wire 2 during winding, the insulating film 4 may be damaged and peeled off, but this can also be prevented.

The present invention provides a winding machine that forms a coil by rotating the nozzle around the bobbin and winding the lead wire bent at the opening end face of the nozzle around the bobbin. The present invention relates to a winding machine characterized by being provided with a guide means for bending the conductive wire bent at the end face at a predetermined angle in a direction opposite to the above-mentioned bending direction.

Therefore, according to the present invention, the bending stress generated in the conducting wire due to bending of the opening end face of the nozzle can be canceled by the guide means, so that it is possible to obtain a uniform coil of a predetermined shape without deformation such as warping. .

[Brief explanation of drawings]

Fig. 1 is a perspective view of a coil that can be obtained by the winding machine according to the present invention, Fig. 2 is a perspective view of a conducting wire used in the coil, and Figs. 3 and 4 are main parts of a conventional winding machine. 5 is a partially sectional side view of the coil, and FIG. 5 is a perspective view of the warped coil.
FIG. 6 is a partially sectional side view of the main part of a winding machine showing the first embodiment of the present invention, and FIG. 7 is a partially sectional side view of the main part of the winding machine showing the second embodiment. , FIG. 8 is a perspective view of the main parts of a winding machine showing a third embodiment. In addition, in the symbols used in the drawings, 1...
・Coil, 2...Conductor, 6...Bobbin, 11...Nozzle, 11a...Open end surface, 13...Guide, 15... Rotation guide.

Claims (1)

[Scope of utility model registration request] By rotating the nozzle around the bobbin, the conducting wire led out from the nozzle is forced to be wound around the bobbin, and the conducting wire is forced to be led out while being bent at the opening end surface of the nozzle. 1. A wire winding machine comprising: a guide means for bending the bent conductive wire in a direction opposite to the bending direction;