JP2009095093A - Conductive terminal device and dynamo-electric machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a conductive terminal device reduced in cost while it is equipped with a choke coil. <P>SOLUTION: The conductive terminal device 21 is equipped with: a brush holder 22 which holds a plurality of brushes 25 for feed for feeding an armature with power; conductive terminal pieces 42, 43, 52 and 53, which are arranged on the brush holder 22 so as to electrically connect external connectors, connected to a power unit, with the brushes 25 for feed; and a choke coil 62 which is arranged on the brush holder 22 so as to electrically connect external connectors with the brushes 25 for feed, together with the terminal pieces 42, 43, 52 and 53, being connected in series to the terminal pieces 42, 43, 52 and 53. Coil sections 44 and 54, which constitute the coke coil 62 together with the ferrite core 61, are constituted of the same plate-shaped material as a plate-shaped material, which constitutes the terminal pieces 42, 43, 52 and 53, and they are formed in a body with the terminal pieces 42, 43, 52 and 53. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a conductive terminal device for supplying power to an armature, and a rotating electric machine including the conductive terminal device.

2. Description of the Related Art Conventionally, some rotating electrical machines such as DC motors are provided with a conductive terminal device for supplying current supplied from an external power supply device to an armature, as described in Patent Document 1, for example. The conductive terminal device includes a brush holder for holding a plurality of power supply brushes for supplying power to an armature (the commutator), an external connector disposed on the brush holder and connected to a power supply device, and the power supply brush. A conductive terminal piece for electrically connecting the two.
JP 2002-315256 A

  By the way, as a conductive terminal device, there is a high-grade specification in which a choke coil is arranged in a brush holder. The choke coil is connected in series with the terminal piece, and electrically connects the external connector and the power supply brush together with the terminal piece, and has a noise prevention function.

  However, in general, a choke coil is composed of a core and a coil portion made of a linear material wound around the core, and the cost of the parts increases the cost of the conductive terminal device.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a conductive terminal device and a rotating electrical machine that can be reduced in cost while having a choke coil.

  In order to solve the above problem, in the invention according to claim 1, a brush holder for holding a plurality of power supply brushes for supplying power to the armature, and an external connector disposed in the brush holder and connected to the power supply device A conductive terminal piece for electrically connecting the power supply brush to the power supply brush, the brush holder, and the terminal piece connected in series with the external connector and the power supply brush. A conductive terminal device comprising a choke coil for electrically connecting the choke coil together with a core, the coil portion constituting the choke coil is made of the same plate material as the plate material constituting the terminal piece It was done.

  According to the same configuration, the coil portion of the choke coil is composed of the same plate-shaped material as the plate-shaped material constituting the terminal piece. For example, compared with the case where the coil portion is composed of another linear material. The types of materials constituting the entire conductive terminal device can be reduced. For example, when the terminal piece is formed by punching from a band-shaped base material (plate-like material), the waste material increases depending on the shape of the terminal piece, but the coil portion is configured by the portion that becomes the waste material. It becomes possible to reduce waste materials. Therefore, cost reduction of the conductive terminal device can be achieved.

According to a second aspect of the present invention, in the conductive terminal device according to the first aspect, the coil portion is integrally formed with the terminal piece.
According to this configuration, since the coil portion is integrally formed with the terminal piece, a connection structure between the terminal piece and the choke coil (coil portion) such as caulking or welding can be eliminated. Therefore, caulking equipment, welding equipment, and quality inspection equipment for the connection structure are not required, and a process for obtaining the connection structure in the manufacturing process is not required. Therefore, further cost reduction of the conductive terminal device can be achieved.

  According to a third aspect of the present invention, in the conductive terminal device according to the first or second aspect, the coil portion is alternately reversed from the substantially rectangular shape in which cuts are alternately provided from opposite sides, with the cuts being the boundary. Was bulged in the plate thickness direction to form a coil.

  According to the same configuration, the coil portion is alternately bulged in the opposite plate thickness direction from the substantially rectangular shape in which cuts are alternately provided from the opposite sides, and is formed in a coil shape. Specifically, the coil portion can be easily obtained from the shaped material.

  According to a fourth aspect of the present invention, there is provided a fixed terminal having the conductive terminal device according to any one of the first to third aspects, the armature, and a permanent magnet disposed so as to surround the armature. The gist of the rotating electrical machine includes a child.

  According to the configuration, in the rotating electrical machine, the effect of the invention according to any one of claims 1 to 3 can be obtained.

  ADVANTAGE OF THE INVENTION According to this invention, while providing a choke coil, the electrically conductive terminal apparatus and rotary electric machine which can achieve cost reduction can be provided.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment in which the present invention is embodied in a DC motor used as a drive source of a blower mounted on a vehicle will be described with reference to the drawings.
FIG. 1 is a schematic configuration diagram of a DC motor as a rotating electrical machine of the present embodiment. As shown in FIG. 1, a bearing 2 is provided at the center of the upper base 1a of the bottomed cylindrical yoke housing 1 constituting the DC motor, and a plurality of (in the figure) are provided on the inner peripheral surface of the yoke housing 1. A permanent magnet 3 (only one is shown) is fixed. In the present embodiment, the yoke housing 1 and the permanent magnet 3 constitute a stator. The opening of the yoke housing 1 is closed by a substantially disc-shaped end frame 4, and a sliding bearing 5 is provided at the center of the end frame 4. The armature 11 is rotatably supported inside the yoke housing 1 by the sliding bearing 5 and the bearing 2.

  The armature 11 is formed by fixing an armature core 14 and a commutator 15 around which a winding 13 is wound around a rotating shaft 12 whose both ends are respectively supported by the bearing 2 and the sliding bearing 5. . The armature core 14 is fixed to the upper bottom 1a side of the yoke housing 1 on the rotating shaft 12 (position surrounded by the permanent magnet 3), and the commutator 15 is connected to the end frame 4 side of the rotating shaft 12. It is fixed to. The commutator 15 has a cylindrical shape, and a plurality of strip-shaped segments 15 a are arranged in parallel in the circumferential direction on the outer peripheral surface thereof. The end of the winding 13 is electrically connected to the predetermined segment 15a.

  A conductive terminal device 21 is disposed on the inner side surface of the end frame 4. As shown in FIG. 2, the disk-shaped brush holder 22 constituting the conductive terminal device 21 is formed of an insulating synthetic resin material, and the armature 11 (the commutator thereof) is formed at the radial center portion thereof. A circular armature insertion hole 23 into which 15) is inserted is formed. The inner diameter of the armature insertion hole 23 is formed larger than the outer diameter of the commutator 15. In addition, four brush holding portions 24 are fixed on one end surface of the brush holder 22 in the axial direction (front surface in FIG. 2). The four brush holding portions 24 have a substantially rectangular tube shape, and are arranged so as to extend along the radial direction at four locations that are equiangularly spaced in the circumferential direction in the brush holder 22. In addition, each brush holding portion 24 has an inner peripheral end projecting radially inward from the inner peripheral surface of the armature insertion hole 23.

  Each brush holding portion 24 accommodates and holds a power supply brush 25 having a substantially quadrangular prism shape. Each power supply brush 25 is urged inward in the radial direction by an urging member (not shown), so that the tip portion thereof is in press contact with the outer peripheral surface of the commutator 15. Note that any one of a leaf spring, a compression coil spring, a helical spring, and the like is used as the biasing member.

  Further, as shown in FIG. 3, a conductive metal plate-like material is provided on the other end surface of the brush holder 22 in the axial direction, that is, on the surface opposite to the side where the brush holding portion 24 is provided. Two terminal members 41 and 51 are arranged.

  Specifically, as shown in FIGS. 2 and 3, each of the terminal members 41, 51 is located between the two brush holding portions 24 adjacent to each other in the circumferential direction (on the lower side in FIGS. 2 and 3) (2 The armature insertion hole 23 is formed so as to detour (each in the reverse rotation direction) to a position 180 degrees apart (the upper side in FIGS. 2 and 3) across the two brush holding portions 24. Each of the terminal members 41 and 51 is fixed to the brush holder 22 by a plurality of caulking claws 41 a and 51 a that are appropriately provided passing through the brush holder 22.

  And each terminal member 41 and 51 of this Embodiment is each terminal piece 42,43,52,53 comprised by stamping from the same plate-shaped raw material (band-shaped base material), and coil part 44,54. Are integrally formed. More specifically, the terminal pieces 42, 43, 52, 53 have a shape (plate shape) simply punched from a plate-shaped material. The terminal pieces 42, 43, 52, 53 are composed of terminal pieces 42, 52 extending across one brush holding part 24 from the base end position (lower side in FIGS. 2 and 3), the terminal pieces 42, 52 is branched from the first terminals 43a, 53a and the first terminals 43a, 53a extending from the tip of the coil 52 via the coil portions 44, 54, and further straddles another brush holding portion 24 (in FIGS. 2 and 3, Terminal pieces 43 and 53 having second terminals 43b and 53b extending to the upper side).

  As shown in FIG. 4, the coil portions 44 and 54 constitute a choke coil 62 having a noise prevention function together with a ferrite core 61 as a core. First, as shown in FIG. 5, the coil portions 44 and 54 are formed into a substantially rectangular shape having a plurality of cuts 63 provided alternately from opposite sides by punching from a plate-like material. As shown to (a)-(c), it is set as the coil shape by bulging (curving) by the reverse plate | board thickness direction alternately with the said notch 63 (refer FIG. 5) as a boundary. As shown in FIG. 4, a columnar ferrite core 61 is inserted and held inside the coil portions 44 and 54 to constitute a choke coil 62. The choke coil 62 of the present embodiment has a substantially cylindrical shape as a whole, and protrudes in both the plate thickness directions from the terminal pieces 42, 43, 52, 53. It arrange | positions without colliding with the brush holder 22 by arrange | positioning in the through-hole 22a formed in the holder 22. FIG.

  As shown in FIG. 2, the first terminals 43a and 53a and the second terminals 43b and 53b are formed on the brush holder 22 from one end surface (front surface in FIG. 2) of the brush holder 22 in the axial direction. Through the through holes 22a and 22b, the tip ends of the pigtails 71 extending from the power supply brush 25 are electrically connected and fixed.

  As shown in FIG. 1, the conductive terminal device 21 configured as described above is such that the surface on the brush holding portion 24 side faces the inside of the yoke housing 1 and the side on which the terminal members 41 and 51 are disposed. Is disposed between the yoke housing 1 and the end frame 4 so that the surface of the side faces the end frame 4 side. An external connector 73 connected to a controller 72 as a power supply device for controlling the motor is connected to the conductive terminal device 21 from the outer peripheral side, and the connection terminal of the external connector 73 is a terminal in the terminal members 41 and 51. The connection ends 42a and 52a (see FIG. 3), which are the base ends of the pieces 42 and 52, are electrically connected to each other.

  In the motor configured as described above, the current supplied through the external connector 73 is supplied to the terminal portions 41 and 51 (that is, the terminal pieces 42 and 52, the coil portions 44 and 54 (choke coil 62), and the terminal piece 43. 53), and is supplied to the winding 13 of the armature 11 through the power supply brush 25 and the commutator 15. The armature 11 is rotated by supplying power to the winding 13.

Next, the characteristic effects of the above embodiment will be described below.
(1) Since the coil portions 44 and 54 of the choke coil 62 are made of the same plate-like material as the plate-like materials constituting the terminal pieces 42, 43, 52 and 53, for example, the coil portions are formed in different linear shapes. Compared with the case where it comprises from a raw material, the kind of raw material which comprises the whole conductive terminal device 21 can be decreased. Therefore, it is possible to reduce the cost of the conductive terminal device 21 and thus the DC motor.

  (2) Since the coil portions 44 and 54 are integrally formed with the terminal pieces 42, 43, 52, and 53, a connection structure between the terminal piece and the choke coil (coil portion) such as caulking or welding can be eliminated. . Accordingly, caulking equipment, welding equipment, and quality inspection equipment for the connection structure are not required, and a process for obtaining the connection structure in the manufacturing process is not required. Therefore, further cost reduction of the conductive terminal device 21 can be achieved.

  (3) The coil portions 44 and 54 are bulged (curved) in the opposite plate thickness direction alternately from the substantially rectangular shape provided with the cuts 63 alternately from the opposite sides, and are formed into a coil shape. Therefore, the coil parts 44 and 54 can be specifically and easily obtained from a plate-shaped material.

  (4) Since the brush holder 22 has a through hole 22a in which a part of the choke coil 62 is disposed, the choke coil 62 protrudes (in the thickness direction of the terminal pieces 42, 43, 52, 53). Therefore, the increase in size of the conductive terminal device 21 is suppressed.

The above embodiment may be modified as follows.
-In above-mentioned embodiment, although the coil parts 44 and 54 were formed integrally with the terminal pieces 42, 43, 52, and 53, it is not limited to this, The board same as the plate-shaped material which comprises a terminal piece As long as it is made of a shaped material, it may be formed separately (independently) from the terminal piece. For example, when a terminal piece is punched from a band-shaped base material (plate-like material), the amount of waste material increases depending on the shape of the terminal piece (such as a shape that bypasses the armature insertion hole 23). It becomes possible to reduce waste material by comprising a coil part in the part which becomes. Therefore, cost reduction of the conductive terminal device can be achieved.

  In the above-described embodiment, the coil portions 44 and 54 are bulged (curved) alternately in the opposite thickness direction from the substantially rectangular shape provided with the cuts 63 alternately from the opposite sides, with the cuts 63 as a boundary. Although it is assumed to be coiled, it may be changed to another configuration as long as it is made of the plate material and coiled.

  In the above embodiment, the brush holder 22 is formed with the through hole 22a in which a part of the choke coil 62 is disposed. However, the present invention is not limited to this, and a part of the choke coil 62 is disposed. You may change into the brush holder in which the through-hole 22a is not formed. In this case, for example, a configuration is required in which the choke coil 62 is arranged so as to protrude largely from the brush holder so as to be raised in one of the terminal pieces 42, 43, 52, 53 in the plate thickness direction.

  In the above embodiment, the terminal pieces 42, 43, 52, 53 are arranged on the brush holder 22 (on the lower surface in FIG. 1). It is good also as a terminal piece embedded (insert-molded) inside the brush holder. Of course, the fixing structure of the terminal members 41 and 51 to the brush holder 22 is not limited to the caulking by the caulking claws 41a and 51a, but may be changed to other fixing structures such as adhesion.

  In the above embodiment, the conductive terminal device 21 holds the four power supply brushes 25. However, the number of the power supply brushes 25 provided in the conductive terminal device 21 is not limited to this. For example, two For example, the number may be changed as long as it is plural. In this case, of course, it is necessary to change the shapes of the terminal members 41 and 51 (particularly the terminal pieces 42, 43, 52 and 53).

  In the above embodiment, the brush holder 22 has a disc shape. However, as long as the shape can hold the power supply brush 25 and can be disposed in the opening of the yoke housing 1, other shapes such as a square plate shape may be used. You may change to

  In the above embodiment, the present invention is embodied in a DC motor used as a drive source for a blower mounted on a vehicle. However, the present invention may be embodied in other rotating electrical machines used for other purposes.

The technical idea that can be grasped from the above embodiments will be described below together with the effects thereof.
(B) The conductive terminal device according to any one of claims 1 to 3, wherein the brush holder is formed with a through hole in which at least a part of the choke coil is disposed. Terminal equipment.

  According to this configuration, the brush holder is formed with a through-hole in which at least a part of the choke coil is disposed, so that an increase in the size of the conductive terminal device due to the protrusion of the choke coil is suppressed.

FIG. 3 is an axial sectional view of a motor in the present embodiment. The top view of the conductive terminal device in this Embodiment. The bottom view of the conductive terminal device in this Embodiment. The top view of the choke coil in this Embodiment. The top view for demonstrating the manufacturing process of the coil part in this Embodiment. (A) The top view of the coil part in this Embodiment, (b) The side view of the coil part in this Embodiment, (c) The top view of the coil part in this Embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Yoke housing which comprises a part of stator, 3 ... Permanent magnet, 11 ... Armature, 21 ... Conductive terminal device, 22 ... Brush holder, 25 ... Brush for electric power feeding, 42, 43, 52, 53 ... Terminal piece , 44, 54 ... coil portion, 61 ... ferrite core (core), 62 ... choke coil, 63 ... notch, 72 ... controller (power supply device), 73 ... external connector.

Claims (4)

A brush holder for holding a plurality of power supply brushes for supplying power to the armature;
An electrically conductive terminal piece for electrically connecting an external connector connected to a power supply device and the brush for power supply, which is disposed on the brush holder;
A conductive terminal device that is disposed in the brush holder and is connected in series with the terminal piece and includes a choke coil for electrically connecting the external connector and the power supply brush together with the terminal piece,
The coil part which comprises the said choke coil with a core was comprised from the same plate-shaped material as the plate-shaped material which comprises the said terminal piece, The conductive terminal device characterized by the above-mentioned. The conductive terminal device according to claim 1,
The conductive terminal device, wherein the coil portion is integrally formed with the terminal piece. In the conductive terminal device according to claim 1 or 2,
The conductive terminal device is characterized in that the coil portion is formed in a coil shape by alternately bulging in a reverse plate thickness direction from the substantially rectangular shape in which cuts are alternately provided from opposite sides to the cut. .   A conductive terminal device according to any one of claims 1 to 3, the armature, and a stator having a permanent magnet disposed so as to surround the armature. Rotating electric machine.

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