JP4676635B2 - Motor conductive terminal device and manufacturing method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a motor conductive terminal device and a method of manufacturing the same.
[0002]
[Prior art]
Generally, when driving a DC machine such as a DC motor, it is necessary to feed power to the armature. Power is supplied to the armature by bringing a brush connected to an external power source through a lead wire and a connector into contact with a commutator of the armature.
[0003]
FIG. 3 is a sectional view showing this type of DC motor. 4 is a cross-sectional view taken along line AA in FIG. As shown in FIG. 3, the DC motor 31 includes a stator 32 and an armature 33 as a rotor. The stator 32 includes a yoke 34 and a plurality of magnets 35 disposed in the yoke 34. The armature 33 is provided with a plurality of teeth 36. Between each tooth 36, a slot 37 for winding a winding is formed.
[0004]
A commutator 38 is provided at one end of the armature 33. A brush 39 is in sliding contact with the commutator 38. As shown in FIG. 4, the brush 39 is supported by a brush support member 40 and is fixed to a brush holder 41 together with the brush support member 40. The brush holder 41 is made of an insulating resin and is formed in a disk shape as shown in FIGS. 4 and 5. A through hole (hereinafter referred to as an armature insertion hole) 42 through which the armature 33 is inserted is provided at the center of the brush holder 41. On the surface of the brush holder 41, a connector 43 for connecting to an external power source is fixed, and a conductive terminal device 44 for connecting to the brush 39 is fixed.
[0005]
As shown in FIG. 5, the conductive terminal device 44 includes two terminal pieces 45 and 46 connected to the connection terminals 43 a and 43 b of the connector 43, respectively. Both terminal pieces 45, 46 are made of a conductive material and have substantially U-shaped brush connection portions 45a, 46a and connector connection portions 45b, 46b extending to one end of the brush connection portions 45a, 46a. ing.
[0006]
[Problems to be solved by the invention]
Conventionally, both the terminal pieces 45 and 46 are formed by stamping from a flat plate material W as shown in FIG. In this case, there is a problem that the yield of the material is extremely deteriorated because a lot of the waste material S appears depending on the product shape.
[0007]
Therefore, it is conceivable to eliminate the waste material by bending the brush connection portions 45a and 46a with a wire (bar) material having the same width T as the both terminal pieces 45 and 46. However, in this case, the tips of the connector connecting portions 45b and 46b for connecting to the connectors and the like are substantially the same thickness t (wire (bar) material) as the connector side connection terminals (not shown) as shown in FIG. It is necessary to process into a fitting shape having a thickness much smaller than the width T. Therefore, labor is required for processing the tip of the connector connecting portions 45b and 46b. Moreover, when the fitting shape of the connector connection portions 45b and 46b is female, there is a problem that it is difficult to process the connector connection portions 45b and 46b.
[0008]
An object of the present invention is to provide a conductive terminal device for a motor that can improve the yield of materials and can be easily manufactured, and a method for manufacturing the same.
[0009]
[Means for Solving the Problems]
In order to solve the above problems, the invention according to claim 1 is a brush for supplying power to an armature, a brush holder made of an insulating material having an armature insertion hole, and a connection for connecting to an external power source. A connector having a terminal; and a terminal piece made of a conductive material electrically connected to the connection terminal. The terminal piece is mounted on the brush holder surface and electrically connected to the brush. In the conductive terminal device of the motor, the terminal piece is formed in a bent shape in a plan view of the terminal piece by bending an elongated plate , and the terminal piece includes a brush connecting portion and a connector provided at an end portion thereof. A connecting portion, and the brush connecting portion is orthogonal or oblique across the bent portion when the elongated plate is bent. And a bent portion formed between the orthogonal or oblique sides. The bent portion is a portion where the plate overlaps in the thickness direction of the terminal piece by bending the elongated plate. It is configured to include a the gist of Rukoto.
[0010]
According to a second aspect of the present invention, in the conductive terminal device for a motor according to the first aspect, the side portion extends from the top side portion so as to be orthogonal or obliquely intersected from both ends of the top side portion. and a side portion, the bent portion is formed between the said top edge portion and both side portions, said terminal pieces, said side portions armature insertion hole about said armature insertion hole The gist is that they are arranged to surround.
[0011]
The gist of the invention described in claim 3 is that, in the motor conductive terminal device according to claim 1 or 2, two identically shaped terminal pieces are arranged on the brush holder so as to face each other. To do.
[0012]
The invention according to claim 4 is a brush for supplying power to the armature, a brush holder made of an insulating material having an armature insertion hole, a connector having a connection terminal for connection to an external power source, and the connection terminal A terminal piece made of a conductive material electrically connected to the terminal piece, and the terminal piece is formed in a bent shape in plan view of the terminal piece by bending an elongated plate. A connecting portion and a connector connecting portion provided at an end thereof, wherein the brush connecting portion is formed by bending the elongate plate and a side portion orthogonal or oblique across the bent portion and the orthogonal or oblique crossing. A bent portion formed between the two sides, and the bent portion is pushed in the thickness direction of the terminal piece by bending the elongated plate. It is configured to include a portion that is over preparative overlap, the terminal piece, the mounted on the brush holder surface, in the manufacturing method of the conductive terminal equipment of a motor comprising electrically connected to the brush, the terminal piece Is formed by bending a predetermined position of an elongated plate made of a single conductive material into a bent shape and mounted on the brush holder.
[0013]
(Function)
According to the first and fourth aspects of the invention, the conductive terminal device can be manufactured by a simple method, and the yield of the material can be improved as compared with the prior art.
[0014]
According to invention of Claim 2 and 3, a conductive terminal device can be manufactured easily.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. The DC motor of this embodiment is formed with the same configuration as a conventional DC motor, and is characterized only by the structure of the terminal piece of the conductive terminal device and the manufacturing method thereof. Therefore, for convenience of explanation, only the structure of the terminal piece of the conductive terminal device and the manufacturing method thereof will be described in detail, and the same reference numerals will be given to the same components as those of the conventional DC motor, and detailed description will be omitted.
[0016]
The conductive terminal device of the motor of this embodiment includes two terminal pieces 11 and 12. Both terminal pieces 11 and 12 are formed in the same shape, and include a brush connection portion 13 and a connector connection portion 14 provided at one end of the brush connection portion 13 as shown in FIG.
[0017]
The brush connecting portion 13 includes a top side portion 13a and side side portions 13b and 13c extending vertically from both ends of the top side portion 13a, and is formed in a substantially U shape. Bent portions 13d and 13e are formed between the side portions 13b and 13c and the top portion 13a, respectively. That is, the side parts 13b and 13c are formed by bending from both ends of the top part 13a.
[0018]
The connector connecting portion 14 is extended to one side portion 13c of the brush connecting portion 13, and is bent from the tip of the side portion 13c so as to be perpendicular to the side portion 13c. That is, the connector connecting portion 14 is parallel to the top side portion 13a.
[0019]
Next, the manufacturing method of the conductive terminal device of the motor of this embodiment will be described.
First, both the terminal pieces 11 and 12 are formed by bending with an elongated plate 20 having predetermined dimensions (length, width and thickness) shown in FIG. The plate 20 is made of a conductive material and has the same length as the developed length of the terminal pieces 11 and 12 and the same width as the width of the terminal pieces 11 and 12. The plate 20 has the same thickness as the connector connecting portion 14 of the terminal pieces 11 and 12.
[0020]
Then, as shown in FIG. 2, a plurality of folding lines P1 to P5 (shown by broken lines in FIG. 2) are determined in advance on the plate 20, and the plate 20 is bent along the folding lines P1 to P5. The fold lines P1 and P2 are oblique from the point K1 on one side surface (upper side surface in FIG. 2) to the other side surface (lower side surface) at a predetermined distance L1 from one end (left end in FIG. 2) of the plate 20. It is a straight line drawn to. The fold lines P1 and P2 are drawn such that the angles formed with one side surface of the plate 20 are the same angle α. The broken lines P3 and P4 are straight lines drawn obliquely from the point K2 on one side surface to the other side surface at a predetermined distance L2 from the point K1. The folding lines P3 and P4 are also drawn so that the angle formed with one side surface of the plate 20 is the same angle α. Further, the fold line P5 is a straight line drawn obliquely toward the one side surface (close to the left end of the plate 20) from the point K3 on the other side surface at a predetermined distance L3 from the point K2. The fold line P5 is drawn so that an angle formed with the other side surface of the plate 20 is an angle β.
[0021]
In the present embodiment, the predetermined distance L1 is set to be the same as the length of the side portion 13b, the predetermined distance L2 is set to be the same as the length of the top portion 13a, and the predetermined distance L3 is the side. It is set to be the same as the length of the side portion 13c. Moreover, the predetermined distance L1 and the predetermined distance L3 are set to be the same. A distance L4 from the point K3 to the other end (right end in FIG. 2) of the plate 20 is set to be the same as the length of the connector connecting portion 14. Further, the angle α is set to 22.5 degrees, and the angle β is set to 45 degrees.
[0022]
And the terminal pieces 11 and 12 as shown in FIG. 1 are formed by bend | folding the plate 20 along each said fold line P1-P5. In the formed terminal pieces 11 and 12, the side portions 13b and 13c are perpendicular to the top portion 13a, and the connector connecting portion 14 is perpendicular to the side portion 13c.
[0023]
Then, the terminal pieces 11 and 12 formed as described above are fitted into the connector 43 so that the respective connector connection portions 14 are connected to the connection terminals 43 a and 43 b of the connector 43, and attached to the brush holder 41. (See FIG. 5). At this time, both terminal pieces 11 and 12 are arranged so as to face each other and surround the armature insertion hole 42.
[0024]
Hereinafter, the characteristics of the conductive terminal device of the motor of this embodiment and the manufacturing method thereof will be described.
(1) In the present embodiment, the terminal pieces 11 and 12 constituting the conductive terminal device have bent portions 13d and 13e, and are formed by bending predetermined positions of the elongated plate 20 made of one conductive material. And attached to the brush holder 41. Therefore, the conductive terminal device can be manufactured by a simple method, and the yield of the material can be improved as compared with the prior art.
[0025]
(2) In this embodiment, both the terminal pieces 11 and 12 are formed in the same shape, and are arranged so as to face each other and surround the armature insertion hole 42 around the armature insertion hole 42. Therefore, the conductive terminal device can be easily manufactured.
[0026]
In addition, you may change this embodiment as follows.
In the above embodiment, the bent portion 13d of the brush connecting portion 13 is formed by bending along the two fold lines P1 and P2, and the bent portion 13e is formed by bending along the two fold lines P3 and P4. However, you may form the bending parts 13d and 13e of the brush connection part 13 by bending along one folding line, respectively.
[0027]
In the above embodiment, the terminal pieces 11 and 12 have the side portions 13b and 13c formed in a direction orthogonal to the top side portion 13a, but the terminal pieces 11 and 12 have the side portions 13b and 13c respectively. You may form in the crossing direction with the top part 13a. That is, the angle α of the fold lines P1 to P4 may be set to an angle other than 22.5 degrees. Moreover, you may set the angle which the side parts 13b and 13c each make with the top part 13a to a different angle.
[0028]
In the above embodiment, the terminal pieces 11 and 12 have the connector connecting portions 14 formed in a direction orthogonal to the side portions 13c. However, the terminal pieces 11 and 12 are inclined with respect to the side portions 13c. You may form in a cross direction. That is, the angle of the fold line P5 may be set to an angle other than 45 degrees.
[0029]
In the above embodiment, the side portions 13b and 13c are formed with the same length, but the side portions 13b and 13c may be formed with different lengths.
[0030]
【The invention's effect】
As described above in detail, according to the present invention, the yield of the material can be improved and the manufacturing can be easily performed.
[Brief description of the drawings]
FIG. 1 is a front view of a terminal piece constituting a conductive terminal device of a motor.
FIG. 2 is a front view of an elongated plate for manufacturing a terminal piece.
FIG. 3 is a cross-sectional view of a DC motor.
4 is a cross-sectional view of the DC motor taken along line AA in FIG.
FIG. 5 is a plan view of a conductive terminal device.
FIG. 6 is a main part view showing a connector connecting portion of a conventional terminal piece.
FIG. 7 is a plan view showing a conventional method for manufacturing a terminal piece.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 11,12 ... Terminal piece, 13d, 13e ... Bending part, 20 ... Elongated plate, 39 ... Brush, 41 ... Brush holder, 42 ... Through-hole as armature insertion hole, 43 ... Connector, 43a, 43b ... Connection terminal .

Claims (4)

A brush (39) for supplying power to the armature (33);
A brush holder (41) made of an insulating material having an armature insertion hole (42);
A connector (43) having connection terminals (43a, 43b) for connection to an external power source;
Terminal pieces (11, 12) made of a conductive material electrically connected to the connection terminals (43a, 43b),
The terminal pieces (11, 12) are mounted on the surface of the brush holder (41) and electrically connected to the brush (39).
The terminal pieces (11, 12) are formed in a bent shape in plan view of the terminal pieces (11, 12) by bending an elongated plate ,
The terminal piece (11, 12) includes a brush connecting portion (13) and a connector connecting portion (14) provided at an end thereof, and the brush connecting portion is a bent portion by bending the elongated plate. A side portion (13a, 13b, 13c) that is orthogonal or oblique with respect to the side wall, and a bent portion (13d, 13e) formed between both sides that are orthogonal or oblique, , said elongated plate wherein is configured to include a thickness direction plates overlap in a portion of the terminal piece electrically conductive terminal apparatus for a motor according to claim Rukoto by bending. The side portions (13a, 13b, 13c) include a top side portion (13a) and side sides (13b, 13c) that extend orthogonally or obliquely from both ends of the top side portion, The bent portion is formed between the top side and the side sides,
The said terminal piece (11, 12) is arrange | positioned so that the said edge part may surround the armature insertion hole (42) around the said armature insertion hole (42). Conductive terminal device for motor.   3. The conductive terminal device for a motor according to claim 1, wherein two terminal pieces (11, 12) having the same shape are arranged on the brush holder (41) so as to face each other. A brush (39) for supplying power to the armature (33);
A brush holder (41) made of an insulating material having an armature insertion hole (42);
A connector (43) having connection terminals (43a, 43b) for connection to an external power source;
Terminal pieces (11, 12) made of a conductive material electrically connected to the connection terminals (43a, 43b),
The terminal pieces (11, 12) are formed in a bent shape in plan view of the terminal pieces (11, 12) by bending an elongated plate, and the terminal pieces (11, 12) are brush connecting portions. (13) and a connector connecting portion (14) provided at an end thereof, and the brush connecting portion is formed by bending the elongate plate so that the side portions (13a, 13a, 13b, 13c) and bent portions (13d, 13e) formed between the orthogonal or oblique sides, and the bent portion has a thickness of the terminal piece by bending the elongated plate. It is configured to include the part where the plates overlap in the direction,
In the method of manufacturing a conductive terminal device for a motor, wherein the terminal pieces (11, 12) are mounted on the surface of the brush holder (41) and electrically connected to the brush (39).
The terminal piece (11, 12) is formed in a bent shape by bending a predetermined position of an elongated plate (20) made of one conductive material, and is mounted on the brush holder (41). Method for manufacturing a conductive terminal device.

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