JPH01122347A - Manufacture of motor - Google Patents

Abstract

PURPOSE:To permit the easy fitting of teeth to a yoke, by a method wherein a plurality of teeth is attached to a printed circuit board, having a diameter smaller than the inner diameter of the yoke, and the teeth, attached to the printed circuit board, is attached to the yoke. CONSTITUTION:A bobbin 4 is formed so as to be hollow and is constituted so that it can be attached to teeth. The outer diameter of a printed circuit board 9 is positioned at the inner diametral side of protuberances 6 of the teeth and is constituted so as to be smaller than the inner diameter of the yoke. The bobbin 4, provided with a winding, is attached to the teeth and is fixed to the printed circuit board 9 through terminals, to which the ends of the winding are connected. The teeth is fitted into the yoke so that the printed circuit board 9, to which the teeth are attached, is inserted ahead of all.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a method of manufacturing an electric motor in which a plurality of teeth are mounted on the inner diameter side of a ring-shaped yoke.

``Prior Art'' A method of manufacturing an electric motor in which a plurality of teeth are attached to the inner diameter side of a ring-shaped yoke involves assembling the yoke by press-fitting the teeth into the yoke using a press or the like.

For this reason, a space or the like is required between the yoke and the teeth in which the press can be applied.

However, since it is necessary to wind the wire on the tooth, by winding the wire on a bobbin or the like and attaching it to the tooth, the exposed portion of the tooth that is necessary for attachment to the yoke will be reduced.

In particular, if there is no exposed part in the part to be fitted with the yoke, it will not be possible to fit the yoke by press-fitting, so the fitting part must be exposed.

In addition, a plurality of teeth are usually arranged evenly on the yoke, and unless the teeth are connected to each other, each piece must be bottomed out, and in such a manufacturing method, Not only is the winding an obstacle, making it difficult to construct the motor, but the cost of constructing the motor becomes extremely high.

Therefore, attempts have been made to connect the teeth to each other, but structurally speaking, if the teeth are connected on the outer diameter side, they cannot fit into the yoke, so they are connected on the inner diameter side, but in this case, magnetic flux leakage occurs. This was a disadvantage.

Therefore, after fitting it to the yoke while connected on the inner diameter side,
The connecting portion on the inner diameter side is either separated or connected within a range where magnetic flux leakage has little effect.

Also, attempts have been made to connect the end faces in the axial direction on the inner diameter side of the tooth portion, but not to connect the inner side.

``Problems to be Solved by the Invention'' However, in these methods, the teeth are connected in a negative manner and fitted to the yoke, and the connected teeth are each wound with a bobbin. When installing the bobbin on the teeth,
Furthermore, there was a problem in that the winding wire etc. became an obstacle when fitting the teeth to the yoke.

The present invention has been made in view of the above circumstances, and is configured to prevent leakage of magnetic flux from occurring, so that the tooth portion can be fitted to the yoke without causing damage to the winding. The purpose is to provide a method for manufacturing an electric motor.

[Means for Solving the Problems] The present invention provides a solution by attaching a plurality of teeth to a printed circuit board having a smaller diameter than the inner diameter of the yoke, and attaching the teeth attached to the printed circuit board to the yoke. It solves the problem.

``Function'' The teeth are connected by a printed circuit board after winding, and the outer diameter of the printed circuit board is smaller than the inner diameter of the yoke, and the teeth are exposed in the radial direction from the printed circuit board. It turns out.

Therefore, the portion of the tooth portion that fits into the joint can be exposed in the radial direction from the printed circuit board and can be fitted.

Since a printed circuit board with an outer diameter smaller than the yoke can pass through the inner diameter side of the yoke, attach the teeth to the printed circuit board and fit the teeth into the yoke with the Punto board side first. can do.

According to this method, the mating position of the teeth can be accurately aligned with the mating position of the yoke by the printed circuit board, and the teeth can be fitted to the mating yoke without being interfered with by the printed circuit board. Can be mated.

``Example'' The present invention will be described based on an example shown in the drawings. FIG. 1 is a plan view of a yoke, FIG. 2 is a plan view of a toothed part,
FIG. 3 is a side view showing the assembled state of the tooth section, FIG. 4 is a perspective view of the tooth section, and FIG. 5 is a perspective view of the bobbin.

In FIG. 1, in the electric motor, a yoke 1 is formed in a ring shape, and a plurality of fitting holes 2 are provided on the inner diameter side.

The yoke 1 is made by punching out a thin steel plate using a press, and is constructed by laminating a large number of them.

Furthermore, in FIG. 2, the tooth portion 3 has a winding 5
is maintained along the inner diameter of the yoke 1.

The tooth portion 3 has a fitting protrusion 6 that fits into the fitting hole 2 of the yoke 1 formed on the outer diameter side, and an inner diameter surface 7 that acts on a rotor (not shown) on the inner diameter side. ing.

Further, a winding 5 is wound around the bobbin 4 so as to be inclined toward the outer diameter side, and flanges 8a are formed at both ends of the bobbin 4 in the radial direction.
, 8b are bent along the shape of the inner diameter and inner diameter surface 7 of the yoke 1, respectively.

In FIG. 3, the teeth 3 are assembled by connecting the ends of the windings 5 to a printed circuit board 9.

The tooth portion 3 is configured to be connected by a terminal 10 provided on the bobbin 4 and to which the winding 5 is connected when the bobbin 4 is attached, and the terminal 10 and the printed circuit board 9 are connected without soldering. It is configured to be fixed by etc.

Further, the outer diameter of the printed circuit board 9 is located on the inner diameter side of the fitting protrusion 6 of the tooth portion 3, and is configured to be smaller than the inner diameter of the yoke 1.

In FIG. 4, the tooth portion 3 is formed by punching steel plates and stacking them with a press, and a protrusion 6 that fits into the inner diameter surface 7 is formed, and a straight bobbin 4 is formed in between.
A mounting part is formed.

In FIG. 5, the bobbin 4 is formed hollow,
It is configured so that it can be attached to the toothed portion 3, and a terminal 10 is provided on the collar 8a, and the end of the winding 5 is connected to this terminal 10.

The terminal 10 of the bobbin 4 is fitted onto the printed circuit board 9 and fixed by soldering.

In such a configuration, the electric motor includes the yoke 1 and the teeth 3.
It is constructed by punching out steel plates and stacking them, and the winding 5 is applied to the bobbin 4 and assembled.

A bobbin 4 having a winding 5 is attached to the tooth 3 and is fixed to a printed circuit board 9 by a terminal 10 connecting the end of the winding 5.

Furthermore, the printed circuit board 9 to which the teeth 3 are attached is fitted into the yoke 1 first.

The method of fitting the teeth 3 to the yoke 1 is that the printed circuit board 9 has a smaller diameter than the inner diameter of the yoke 1, and the printed circuit board 9 is first fitted to the inner diameter side of the yoke 1, and then the teeth 3 are fitted to the yoke 1. Fitting protrusion 6
into the fitting hole 2.

Then, the fitting protrusion 6 and the fitting hole 2 are press-fitted by pressing the teeth 3 with a press.

According to this method, the fitting protrusion 6 is accurately aligned with the fitting hole 2 of the yoke 1 by the printed circuit board 9, so that the loose teeth 3 can be easily aligned with the fitting hole 2 of the yoke 1. Can be fitted with.

Moreover, since the teeth 3 are not connected by themselves, leakage of magnetic flux does not occur, and an efficient electric motor can be constructed.

In addition, by fitting the printed circuit board 9 to the yoke 1 first, the teeth 3 can be press-fitted to the yoke 1 without any contact with the printed circuit board 9, and the fitting projections 6 of the teeth 3 can be press-fitted. The inner diameter surface 7 can be pressed at the same time, and the teeth 3 can be pressed straight along the fitting hole 2.

Therefore, after the teeth 3 are fitted into the yoke 1, the teeth 3 and the yoke 1 can be accurately fitted together without bending.

On the other hand, since the bobbin 4 with the winding 5 can be mounted on the printed circuit board 9 after being mounted on the teeth 3, the end of the winding 5 is connected to the terminal 10 of the bobbin 4, and the terminal 10
By attaching the wire to the printed circuit board 9, work efficiency is improved, the winding 5 is less likely to be damaged, and the occurrence of defects can be reduced.

Furthermore, the tooth portion 3 provided with the winding 5 can be mass-produced in a separate process, making it easy to process a large number of tooth portions 3, and is suitable for mass production.

Fitting such a tooth portion 3 to the yoke 1 is not limited to fitting the printed circuit board 9 first, and the portion that presses the tooth portion 3 against the yoke 1 is pressed. This is possible if it is exposed to

However, in this case, since the tip of the fitting protrusion 6 that is first fitted into the fitting hole 2 of the tooth portion 3 is attached to the printed circuit board 9 away from the part, the tip of the fitting protrusion 6 and the fitting Hole 2
If the printed circuit board 9
It is necessary to accurately attach the tooth portion 3 to the tooth portion 3.

In order to accurately attach the teeth 3 to the printed circuit board 9 in this manner, the bobbin 4 is provided with a protrusion, and the printed circuit board 9 is provided with a hole into which the protrusion fits, and the positioning is performed using these protrusions and holes. When this is done, the teeth 3 and the printed circuit board 9 are accurately positioned.

Further, in this case, the attachment of the tooth portion 3 to the printed circuit board 9 becomes strong, and workability is improved.

Of course, this structure for attaching the teeth 3 to the printed circuit board 9 can be used even when the printed circuit board 9 is fitted first.

"Effects of the Invention" According to the present invention, when the teeth are attached to the yoke, it can be easily and accurately done using a printed circuit board, and problems such as leakage of magnetic flux do not occur due to the connection of the teeth. , it is possible to manufacture highly efficient electric motors, and its effects are industry-leading.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the yoke, Fig. 2 is a plan view of the teeth, Fig. 3 is a side view showing the assembled state of the teeth, and Fig. 4 is a perspective view of the teeth. FIG. 5 is a perspective view of the bobbin. 1... Yoke, 2... Fitting hole, 3... Teeth,
4... Winding wire, 5... Bobbin, 6... Fitting protrusion, 7... Inner diameter surface, 9... Printed circuit board.

Claims (1)

[Claims] In an electric motor in which a plurality of teeth are attached to the inner diameter side of a ring-shaped yoke, the plurality of teeth are attached to a printed circuit board with a smaller diameter than the inner diameter of the yoke, and the teeth attached to this printed circuit board are attached to the yoke. A method for manufacturing an electric motor, characterized in that the motor is attached to a motor.