JPS61280758A - Manufacture of pulse motor - Google Patents

Abstract

PURPOSE:To eliminate the positioning of the second and third yokes and the first and second coils at motor assembling time by integrating the yokes and the coils. CONSTITUTION:When coil conductors are wound on bobbins 21, 22 to form the first and second coils to insert-mold the second and third yokes 6, 7 and integrally form the bobbins 21, 22 of the first and second coils, the first and second coils and the second and third yokes 6, 7 are integrated. The parts are not necessarily positioned at motor assembling time by this manufacturing method, and since they are integrated, its assembling time can be shortened.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a method of manufacturing a claw pole type pulse motor.

fc''l Prior Art Conventionally, a claw pole type pulse motor is known, for example, from Japanese Utility Model Application Publication No. 56-30586.

To explain this based on the drawings, as shown in Figure 8,
The first and second parts in which each <L4tl) to (4) mesh with each other.
Yoke +51 (61 and!1!3 and 43rd-ku (71
(In addition to providing 81, the first and second yokes +51 +6
The first coil (9) located on the outer periphery of No. 1 comb teeth 111 +21, and the third and fourth yokes +7) (81 comb teeth 1
31 (4), and the first and vJ2 yokes [51+61 and the first coil (9) are housed and arranged in the first cylindrical case an, and the third
and the 4th a-ri f71f8) and the 2nd :ff
1 (121) is fixed by spot welding or the like.

In this case, the magnetic rotor (131 can be made into a step transition state of the four kinds of odes.

However, in this conventional pulse motor, although the second and third yokes +21 (31) are connected back to back in spot G and are integrated, the first and second coils +91 (1) and the second and 3 yoke f21 +31
are formed individually, so during assembly and manufacturing, two
It is necessary to individually attach these parts one after another, which not only requires alignment between them, but also has the disadvantage that assembly time is increased.

H1) Problems to be solved by the invention The present invention was invented in view of these points.

It is an object of the present invention to provide a method for manufacturing a pulse motor in which the second and gJ3 yokes and the first and second coils are integrated.

B)) Means for Solving the Problems In order to solve the problems, the present invention provides a method for arranging the second and third yokes such that the comb teeth of the second and third yokes protrude in opposite directions.
A first process of placing the yokes back to back, a second process of insert molding the second and third yokes and integrally forming the bobbins of the first and second films, and a second process of winding a coil around each bobbin. It is comprised of three steps.

…) Effect: The second and third
When the yoke is insert-molded, the bobbins of the first and second coils are integrally formed in 4 (4), so when the coil wire is wound around each bobbin in the third step to form the first and second coils, this First and second coils and second and @3a
Since the parts are integrated, there is no need to align these parts when assembling the motor. Also, since it is integrated, the installation time is short.

In particular, when the terminal part of the coil is integrally formed on the outer edge of the coil bobbin in the J$2 process, the first and second
Processing the coil ends is simpler than conventional methods of winding the coil ends with tape.

(F) Embodiment An embodiment of the present invention will be explained based on the drawings. Components with the same functions as those in the conventional example are indicated by the same reference numerals.

FIG. 3 is a front view of the second yoke. 2 in this drawing, the WS2 yoke (6) is the same as the third yoke (7), and is formed by pressing a magnetic plate. This yoke (6) has multiple <(4+2
1, and the flat plate (141 has a through hole (151 (161) and a protrusion Uη protruding to the back side. This second yoke (
6) is placed back to back so that the third yoke (7) and each comb tooth +21 to +31 protrude in opposite directions, and the protruding portion +171 of each yoke is aligned with the through hole tis JCe of the yoke on the tortoise side. Yoke +6) (7) are aligned and spot welded at spot welding point +IIH181.

A perspective view of both yokes +61 (71) when they are combined is shown in FIG. 4. In this drawing, only some of the comb teeth (2) are shown.

As is clear from Fig. 4, there are 6
U-shaped pieces (19) are bent at equal intervals.

In addition, a positioning bent piece (■) is provided on the periphery of the flat plate (141). be done.

Spot welded second and third yoke tel (7)
teeth.

Each yawser is insert molded as shown in Figure 1.

On the axial end face of the first coil (9), the bobbin (
2) ■ is integrally formed. Further, during this resin molding, the terminal portions of both coils are integrally formed. This terminal part -
Connecting pins corresponding to the number of terminals of both coils f91 (if) are inserted, and the base end of the terminal part is connected to the bobbin with a thin hinge. FIG. 2 shows a half-folded perspective view showing an integrated state similar to FIG. 1.

Both bobbins (21) ■, which are integrally formed with the second and sixth yokes +61 and +71, are provided with U-shaped pieces (11 (1!J) of the three opposing yokes (6) and (7). The coil wires are simultaneously wound to form the first and second coils t9+liG.In this case, the coil ends of one bobbin 2 are directly connected to the corresponding connection pins. , the end of the coil on the local bobbin is guided downward from the U-shaped piece (the groove formed on the side of Fl) during resin molding, and is connected to the corresponding connection pin □□□.

Each bobbin 2υ is covered with a first bottomed cylindrical case αυ shown in FIG. It has a notch (2) that fits into the bent piece (2), and has three bridging pieces (supports) formed by slits (supports).

Each notch is fitted into the positioning bent piece 61 (71) so that the tin opening of the cylindrical case is positioned relative to the second or sixth yoke +61t7. Ti
! It is decided. This much filR is N1 or! J
4 yokes +51 +81 comb teeth +11 +41 is the second
Or the third yoke fil (71 < LID (21+31
, and each bridge counter opposes the window ■ of each U-shaped panel fil. Therefore, each bridge piece (support) is connected to each U-shaped piece four windows O.
■It is tightened to engage.

This state is shown in FIG. In this case, the U-shaped piece OgJu of the second and $3 yokes +61+7) As is clear from FIG.
The bridging pieces (11) of the upper and lower cylindrical cases α11- can be crimped at the same time, improving mass productivity.

When the cylindrical case u2 on the F side is mounted on the bobbin on the D side, as shown in FIG. Fit the mounting grooves and edges of the cylindrical case opening into the fittings '711t' provided in section 3. Note that an external power supply socket is detachably attached to the connection pin.

(G) Effects of the Invention The present invention provides a first yoke in which the second and third yokes are placed back to back so that the comb teeth of the N2 and third yokes protrude in opposite directions.
a second step of insert molding the second and 'i43 yokes and integrally forming the bobbins of the first and second coils, and a third step of winding the coil wire around each bobbin. The second and third yokes, 9J1, and the second coil can be integrated, eliminating the need for alignment of these parts when assembling the motor, and reducing the assembly time of these parts individually. Compared to conventional ones that incorporate
Is it short?

In addition, when the terminal part of the coil is integrally formed on the outside H of the coil bobbin in the second step, the first and second
Coil termination is simplified by conventional tape winding compared to other coil termination methods, especially for the first coil termination.
Since the terminals of the second coil can be processed by connecting them to one terminal, this is more advantageous in manufacturing the motor.

[Brief explanation of the drawing]

! Figures J1 to 7 show an embodiment of the present invention, Figure 1 is a perspective view showing the state in which the second and third yokes and the bobbin are integrated, and Figure 2 is the same integrated state as in Figure 1. A half-folded perspective view of
Figure 3 is a front view of the 2nd:l-ri, Figure 4 is a front view of the 2nd and 6th
FIG. 5 is a perspective view of the cylindrical case, FIG. 6 is a partially enlarged perspective view showing the crimping state of the bridging piece of the cylindrical case, and FIG. 7 is a perspective view of the terminal tube. FIG. 3 is a partial ifr side view of the pulse motor showing how it is attached to the case. ! Figure J8 is an exploded perspective view of a conventional pulse motor. (1) to (4)...Comb teeth, (5) to (8)...First to fourth yokes, +91 [IG...First and second
Coil, 2D no... bobbin. ■...Terminal section. Figure 2 Figure 5 Figure 6 Figure 7 Figure 8

Claims (2)

[Claims] (1) The first to fourth sections each having comb teeth arranged in an annular shape at equal intervals.
A pulse motor that is provided with a yoke, meshes the comb teeth of the first and second yokes, meshes the comb teeth of the third and fourth yokes, and arranges the first or second coil around the meshing comb teeth. In the manufacturing method, a first step of placing the second and third yokes back to back so that the comb teeth of the second and third yokes protrude in opposite directions; A method for manufacturing a pulse motor, comprising: a second step of integrally forming bobbins for first and second coils; and a third step of winding a coil wire around each bobbin. (2) The method for manufacturing a pulse motor according to claim 1, wherein in the second step, a terminal portion of the coil is integrally formed on the outer edge of the coil bobbin.