JP2001320851A - Method for manufacturing motor actuator winding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing motor actuator winding wherein, when an armored case with a conductive piece group inserted is plastic- molded, the armored case can be formed with the rotary shaft hole for the conductive brush formed in the case being precisely positioned relative to the conductive piece group. SOLUTION: A positioning piece 39 with a positioning hole 38 formed in alignment with the position of the axis of the conductive piece group 31 formed arcuately is formed integrally with the conductive piece group 31. When the armored case 1 with the conductive piece group 31 inserted therein is plastic- molded, the positioning hole 38 is aligned with the shaft hole 8, and, after the molding of the armored case 1, the positioning pieces 39 are cut and removed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing wiring of a motor actuator used for controlling opening and closing of an air conditioning door and other doors of an automobile.

[0002]

2. Description of the Related Art In general, a motor actuator of this type is provided with a motor and an axial hole formed in the outer case formed by rotation of the motor inside an outer case formed of an electrically insulating plastic mold. A conductive brush to be moved and a group of arc-shaped conductive pieces for controlling the rotation of the motor according to the contact state with the conductive brush are provided.

[0003] If such a group of conductive pieces is formed on a printed circuit board, the cost is extremely high. Therefore, the group of conductive pieces that are integrally connected is inserted into the outer case, and then the outer case is plastic-molded. The group is separated into a plurality of conductive pieces (Japanese Patent No. 2842907).
No.).

FIG. 7 shows a state in which the conductive piece group 91 of such a conventional motor actuator is insert-molded in an outer case 92. Before the insert molding, the conductive piece group 91 formed integrally is formed. Two positioning holes 93 are formed in the peripheral portion, and the positions of the two holes 93 are used to position the conductive piece group 91 with respect to the exterior case 92 during insert molding.

[0005]

However, as described above, if the positioning of the conductive piece group 91 with respect to the outer case 92 is performed with reference to the peripheral portion, the center of the conductive piece group 91 formed in an arc shape is determined. It is not possible to align the position with the shaft hole 94 formed in the outer case 92 with high accuracy.

As a result, the positional relationship between the conductive brush (not shown) that rotates about the shaft hole 94 and the conductive piece group 91 occurs, and an error occurs in the rotation / stop position control of the motor. .

Therefore, the present invention accurately forms the positional relationship between the conductive shaft group and the rotating shaft hole of the conductive brush formed in the outer case when the outer case is plastic molded by inserting the conductive piece group. It is an object of the present invention to provide a method for manufacturing a wiring of a motor actuator which can be performed.

[0008]

In order to achieve the above-mentioned object, a method for manufacturing a wiring of a motor actuator according to the present invention comprises a motor and an outer case formed in an outer case formed of an electrically insulating plastic mold. A conductive brush rotated by the rotation of the motor around the formed shaft hole, and a group of arc-shaped conductive pieces for controlling the rotation of the motor according to the contact state with the conductive brush are provided. In a method of manufacturing a wiring of a motor actuator, the conductive pieces are separated into individual conductive pieces after the outer case is plastic-molded by being inserted in an integrally connected state, and the conductive pieces are formed in an arc shape. A positioning piece with a positioning hole aligned with the center axis position of the conductor piece is formed integrally with the conductive piece group, and the conductive piece group is inserted to cover the outer case. The positioning holes when stick molded aligned with respect to the shaft hole, is obtained so as to ablate the positioning piece after the outer case forming.

[0009]

Embodiments of the present invention will be described with reference to the drawings. FIG. 3 is an exploded view of the overall configuration of the motor actuator, and 1 is an outer case formed of an electrically insulating plastic mold. Reference numeral 2 denotes a lid formed of the same material.

In the outer case 1, a shaft 4 for rotatably supporting the respective gears constituting the reduction gear group 3, a receiving portion 6 for supporting a driving motor 5, and an output shaft 7 are rotatably fitted. A mating shaft hole 8 is formed.

A part of the outer surface of the outer case 1 is formed in a rectangular cylindrical cross section and opened outward, and a plurality of (for example, four) conductive contact pins are arranged in parallel in the outer case. Connector section 2 for electrical connection to the outside
0 is formed.

FIG. 3 is an exploded perspective view, and shows three-dimensionally with components and the like accommodated in the motor actuator removed. Reference numeral 12 denotes a mounting plate to which the driving motor 5 is attached.

The worm gear 11 attached to the drive shaft of the motor 5 meshes with the first gear 3a of the reduction gear group 3, and the final small gear 3b of the reduction gear group 3 is connected to the large-diameter output gear 10a. It is arranged to mesh with.

An output shaft 7 is press-fitted or integrally formed with the output gear 10, and an arm 9 is attached to one end of the output shaft 7 outside the lid 2 so as to rotate integrally. Is done.

Therefore, when the motor 5 rotates, the rotation thereof is reduced by the reduction gear group 3 and the arm 9 rotates.
The arm 9 is connected to an air conditioning door or the like (not shown), and the opening and closing of the door is controlled.

Reference numeral 31 denotes a group of conductive pieces for detecting the rotation angle of the output shaft 7, 32 denotes a pair of power supply terminals connected to the motor 5 for supplying electric power to the motor 5, and 16 denotes a conductive piece. The conductive brush is fixed to the output gear 10 so as to contact the group 31.

FIG. 4 shows a conductive plate 30 punched from a single metal plate by a press to perform electric wiring. The surface of the conductive plate 30 is hatched for easy understanding. .

The conductive plate 30 includes a conductive piece group 31 in which a plurality of arc-shaped conductive pieces are arranged concentrically around the shaft hole 8, a pair of power supply terminals 32, and four contact pins. It is roughly divided into 33 parts.

The conductive piece group 31 and the contact pins 33 are continuously formed as three integrated sets, and a pair of power supply terminals 32 are formed.
Is formed continuously with a part of the conductive piece group 31, and the other is formed continuously with one of the contact pins 33.

The entire conductive plate 30 is integrally connected by thin connecting portions 35 formed at a plurality of locations.
Five parts are cut off.

The inner region of the conductive piece group 31 formed in an arc shape is a portion where the shaft hole 8 is located, so there must be no conductive plate 30 portion. The conductive piece group 31 is formed by the connecting portions 37 of the book.
And a positioning piece 39 connected to the center position exists.

A circular positioning hole 38 is formed in the positioning piece 39 so as to match the center position of the conductive piece group 31 formed in an arc shape. Another positioning hole 36 is formed in the peripheral portion of the conductive piece group 31.

FIG. 1 shows a conductive plate 30 formed in this manner.
Is shown in a state in which the outer case 1 is molded by plastic molding with only the shaft hole 8 being hatched on the outer case 1 side for easy understanding.
FIG. 2 is a sectional view taken along the line II-II passing through the center of the shaft hole 8.

When the outer case 1 according to the present invention is formed, the positioning holes 36 in the peripheral portion are aligned with the outer case 1 and at the same time, as shown in FIG. Axis 38A of the positioning hole 38
Are aligned with the central axis 8 </ b> A of the shaft hole 8.

Such alignment of the circular holes can be easily performed with very high precision. Therefore, at the time of molding the outer case 1, the conductive piece group 3 formed in an arc shape is formed.
Alignment of the center position of the shaft 1 with the shaft hole 8 formed in the outer case 1 is performed with high accuracy.

Inserting the conductive plate 30 into the outer case 1
When the plastic molding is completed, as shown in FIG.
7 is cut and the positioning piece 39 is cut off.

In the motor actuator thus formed, the conductive piece group 31 is positioned with high precision with respect to the shaft hole 8, so that the rotation of the motor 5 performed by the rotation of the conductive brush 16 is performed. The error of the stop position control can be made very small.

The present invention is not limited to the above embodiment. For example, the shape of the conductive plate 30 may be any shape other than that shown in FIG.

[0029]

According to the present invention, a positioning piece having a positioning hole formed in alignment with the center axis position of a conductive piece group formed in an arc shape is formed integrally with the conductive piece group, and the conductive piece group is formed. When the exterior case is plastic molded, the positioning holes are aligned with the shaft holes, and the positioning pieces are cut off after the exterior case is molded. When performing plastic molding, it is possible to accurately form the positional relationship between the rotating shaft hole of the conductive brush formed on the outer case and the conductive piece group, and to control the rotation / stop position of the motor with a small error. Can be.

[Brief description of the drawings]

FIG. 1 is a plan view of a state immediately after a conductive plate is inserted and an outer case is molded by a method of manufacturing wiring of a motor actuator according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is an exploded perspective view of the motor actuator according to the embodiment of the present invention.

FIG. 4 is a plan view of the conductive plate according to the embodiment of the present invention.

FIG. 5 is a plan view showing a state where molding of an outer case in which a conductive plate is inserted by a method of manufacturing wiring of a motor actuator according to an embodiment of the present invention is completed.

FIG. 6 is a plan view of a conductive plate according to a second embodiment of the present invention.

FIG. 7 is a plan view showing a state immediately after a conductive plate is inserted by a conventional method for manufacturing wiring of a motor actuator and an outer case is molded.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Exterior case 8 Shaft hole 31 Conductive piece group 36 Positioning hole 37 Connecting part 38 Positioning hole 39 Positioning piece

Claims (1)

[Claims] A motor, a motor, a conductive brush rotated around a shaft hole formed in the outer case by rotation of the motor, and an electroconductive brush formed in the outer case formed of an electrically insulating plastic mold; An arc-shaped conductive piece group for controlling the rotation of the motor by the contact state with the brush is provided, and after inserting the conductive piece group in a state of being integrally connected and plastic molding the outer case, In the method of manufacturing a wiring of a motor actuator, wherein the conductive piece group is separated into individual conductive pieces, a positioning piece having a positioning hole formed in accordance with a center axis position of the conductive piece group formed in an arc shape is provided. It is formed integrally with the conductive piece group, and the positioning hole is formed when the conductive piece group is inserted and the outer case is plastic-molded. A method of manufacturing wiring for a motor actuator, wherein the positioning piece is aligned with the shaft hole, and the positioning piece is cut off after forming the outer case.