JP6536249B2 - Electric rotating machine - Google Patents

Description

  The present invention relates to a rotating electrical machine, and more particularly, to a rotating electrical machine having a housing member including a brush housing portion for housing a brush and a terminal housing portion for housing a power feeding terminal.

  In a rotating electrical machine such as a direct current motor provided with a brush, electromagnetic noise (hereinafter simply referred to as noise) is generated due to the sliding contact between the brush and the commutator during operation. This noise includes high frequency band noise that is difficult to remove by a general noise prevention element, and is superimposed on the casing of the rotating electrical machine (for example, the yoke of the motor) to cause radio interference in peripheral devices. As measures against the above-mentioned noise, various techniques have been developed to date, and one example thereof is the technique described in Patent Document 1. When the noise countermeasure technology described in Patent Document 1 is described, the casing of the rotating electrical machine is formed of a resin material, and the outer surface of the casing is covered with a covering layer (shield layer) made of a conductive material. As a result, the above-mentioned noise can be shielded by the covering layer, and the propagation of the noise from the rotating electrical machine to the peripheral equipment can be reduced.

JP 2001-352706 A

  However, in the technology described in Patent Document 1 described above, the entire outer surface of the casing of the rotating electrical machine is to be covered with the above-described covering layer. Therefore, if the above configuration is adopted, the weight of the rotary electric machine increases as the amount of the conductive material used for forming the coating layer increases, and the manufacturing cost of the rotary electric machine increases.

  Therefore, the present invention has been made in view of the above problems, and an object thereof is to provide a rotating electrical machine capable of effectively suppressing the propagation of noise while achieving weight reduction and cost reduction. .

According to the rotating electrical machine of the present invention, the above-mentioned problem is: (A) A rotating member is accommodated and a first accommodating member made of a conductive material; and (B) assembled to the first accommodating member, from a non-conductive material A second housing member, and (C) a cover member partially covering the outer surface of the second housing member and made of a conductive material, wherein (D) the second housing member receives the brush. And a terminal accommodating portion for accommodating a power feeding terminal provided for supplying power to the brush, and (E) the covering member is the brush accommodating portion of the outer surface. And a portion of the outer surface where the terminal receiving portion is located, and are electrically connected to the first receiving member, and the rotating body includes a rotating shaft And the covering member has an axial direction of the rotation axis in the outer surface. And a first fragment covering the end opposite to the first accommodation member, and extending from the first fragment so as to cover a portion of the outer surface where the brush accommodation is located a second fragment unit, wherein the terminal housing portion of said outer surface from said first fragment unit is solved by Rukoto to have a, a third fragment portion extending to cover the portion located.

  According to the rotating electrical machine of the present invention configured as described above, the second housing member including the brush housing portion and the terminal housing portion is formed of a nonconductive material, and a part of the outer surface is formed of a conductive material. Cover by cover member. The cover member is electrically connected to the first housing member made of a conductive material, and a portion of the outer surface of the second housing member where the brush housing portion is located and a portion where the terminal housing portion is located. Cover the As a result, compared to the configuration in which the entire outer surface of the second accommodation member is covered by the covering member, it is possible to reduce the weight and cost of the rotating electrical machine. In addition, by covering the portion where the brush accommodating portion and the terminal accommodating portion are located on the outer surface with the covering member, the portion close to the noise generating portion is covered, so that noise shielding is effectively performed. become. As a result, it is possible to appropriately suppress the propagation of noise while achieving weight reduction and cost reduction of the rotating electrical machine.

In the configuration above SL, of the cover member, fragments portion covering a portion brush accommodating portion at the outer surface of the second housing member is positioned between (the second fragment unit), covering a portion of the terminal housing portion is located fragment Portions (third fragment portions) both extend from the first fragment portion. With such a configuration, since the cover member is integrated into one component, it is possible to further reduce the cost of the rotary electric machine.

Further, in the above-mentioned rotary electric machine, at least one of the extension direction end portions of the second fragmented portion and the third fragmented portion is either inward in the radial direction of the rotation shaft or in the rotation direction of the rotation shaft It is further preferable that the end portion in the extension direction is bent between the first accommodation member and the second accommodation member.
In the above-described configuration, the cover member is formed by bending the end in the extension direction of at least one of the second fragment portion and the third fragment portion and sandwiching the cover member between the first accommodation member and the second accommodation member. Contact the containing member. Thereby, it becomes easy to fix a covering member by simple composition, and to electrically connect a covering member with the first accommodation member.

Further, in the rotating electric machine described above, the second fragmented portion is bent along a portion of the outer surface where the brush accommodating portion is positioned, and the third fragmented portion is the same as the component of the outer surface. It is more preferable to bend along the portion where the terminal accommodating portion is located.
In the above configuration, each of the second fragment and the third fragment is bent along the corresponding portion of the outer surface of the second housing member. As a result, the distance between each of the second fragmented portion and the third fragmented portion and the corresponding portion of the outer surface of the second accommodation member is reduced, so that the enlargement of the rotating electrical machine by providing the covering member is suppressed. Is possible.

Further, in the above-mentioned rotating electrical machine, a portion of the outer surface where the brush accommodating portion is located, a first region forming an end face of the brush accommodating portion in the axial direction, and the first region in the rotational direction of the rotating body And a second area that forms an end face of the brush housing, and the second fragment is more preferably covering both the first area and the second area.
In the above configuration, the end surface of the brush housing in the axial direction of the rotation shaft and the end surface of the brush housing in the rotation direction of the rotary member are both covered by the cover member (strictly, the second fragment) . As a result, it is possible to cover substantially the entire portion of the outer surface of the second accommodation member where the brush accommodation portion is located with the covering member, and it is possible to more effectively suppress the propagation of noise.

Further, in the above-mentioned electric rotating machine, the second accommodation member includes a plurality of the brush accommodation portions, the covering member includes the same number of the second fragment portions as the brush accommodation portions, and the brush It is more preferable that the same number of second fragmented portions as the housing portions are spaced apart from each other in the rotational direction of the rotating body.
In the above configuration, the covering member is provided with the same number of second fragmented portions as the brush accommodating portion, and the respective second fragmented portions are separated from each other in the rotational direction of the rotating body. With such a configuration, the cover member is miniaturized as compared with the configuration in which the second fragments are connected to each other, and accordingly, it is possible to further reduce the weight and cost of the rotary electric machine. Become.

Further, in the above-mentioned electric rotating machine, it is more and more preferable that the first fragmented part is provided with a through hole through which the rotation shaft passes.
In the above configuration, since the through hole for inserting the rotation shaft is formed in the first fragmented portion, the cover member can be attached while avoiding the interference with the rotation shaft. In addition, as a result of the weight reduction of the cover member as a through hole is formed, it is possible to further reduce the weight and cost of the rotary electric machine.

Further, in the above-mentioned electric rotating machine, it is particularly preferable that the cover member is formed by processing a sheet of conductive plate material.
In the above configuration, since the covering member is formed by processing a single plate-like material, the covering member can be prepared at a simple and inexpensive cost.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to implement | achieve the rotary electric machine which can suppress propagation of noise effectively, achieving weight reduction and cost reduction.

It is a side view of rotation electrical machinery in the state where a covering member was removed. It is a figure which shows the internal structure of a rotary electric machine. It is a front view of the rotary electric machine in the state where the cover member was removed. It is a front view of the rotary electric machine in the state where the covering member was attached. It is a figure showing the covering member and the 2nd accommodation member before assembling. It is a figure which shows the 2nd accommodating member with which the covering member was assembled | attached. It is a figure showing the 2nd accommodation member with which the covering member concerning a modification was attached.

  Hereinafter, a rotating electrical machine according to an embodiment (this embodiment) of the present invention will be described with reference to FIGS. FIG. 1 is a view showing an appearance of a rotating electrical machine according to the present embodiment, and strictly speaking, it is a side view of the rotating electrical machine in a state in which a covering member is removed. FIG. 2 is a cross-sectional view showing the internal structure of the rotating electrical machine. FIG. 3 is a front view of the rotary electric machine with the cover member removed, as viewed in the direction of arrow A in FIG. FIG. 4 is a front view of the rotary electric machine in a state in which the cover member is attached, corresponding to FIG. 3. FIG. 5 is a view showing the covering member and the second accommodation member before assembly. FIG. 6 is a view showing the second accommodating member in which the covering member is assembled. FIG. 7 is a view showing a second accommodation member on which a cover member according to a modification is assembled, and is a view corresponding to FIG.

  The embodiment described below is an example for facilitating the understanding of the present invention, and does not limit the present invention. That is, the present invention can be modified and improved without departing from the gist thereof, and the present invention naturally includes the equivalents thereof.

  Further, in the following description, “axial direction” means the axial direction of the rotary shaft 5 described later, “radial direction” means the radial direction of the rotary shaft 5, and “rotational direction” means It means the rotation direction of the armature 3 described later (in other words, the rotation direction of the rotating shaft 5).

  The rotating electrical machine according to the present embodiment is a motor 1 used as a component of a drive device (for example, a wiper drive device or a power window device) used in a vehicle, and is a brushed DC motor. Describing in more detail, the rotating electrical machine according to the present embodiment is a 4-pole brushed DC motor. However, the number of poles is not limited to four and can be set arbitrarily.

  Further, as shown in FIG. 1, the motor 1 has a motor yoke 2 as a first housing member. The motor yoke 2 is a bottomed cylindrical casing, and as shown in FIG. 2, accommodates therein an armature 3 as a rotating body. The armature 3 has a rotating shaft 5 and a core 6 around which a winding C is wound, as shown in FIG. A plurality of permanent magnets 4 for forming four magnetic poles are arranged around the core 6 so as to surround the core 6 and fixed to the inner peripheral surface of the motor yoke 2. Further, a commutator 7 is attached to a portion of the rotation shaft 5 closer to the tip of the rotation shaft 5 than the core 6. The brush 8 is in contact with the outer peripheral surface of the commutator 7. In addition, since the brush 8 does not appear originally in the cross section shown in FIG. 2, the brush 8 is shown with the broken line in the same figure.

  Describing the motor yoke 2 according to the present embodiment in more detail, the motor yoke 2 is made of a conductive material, and more specifically, made of metal. Further, the motor yoke 2 has an open end, and the open end is closed by the brush holder 10 as a second accommodation member. The brush holder 10 doubles as an end plate and has a function of holding the brush 8. The brush holder 10 according to this embodiment holds two brushes 8. However, the number of brushes 8 is not limited to two, and can be set arbitrarily.

  In addition, the brush holder 10 is assembled to the open end of the motor yoke 2. More specifically, the brush holder 10 is formed in a substantially disc shape corresponding to the opening shape of the motor yoke 2 and has a flange portion 10 a in the form of a bowl at its outer edge. The brush holder 10 is assembled to the opening end of the motor yoke 2 by fastening the flange 10 a to the flange 2 a provided on the outer edge of the end of the motor yoke 2 on the opening side.

  Hereinafter, the brush holder 10 according to the present embodiment will be described in more detail. The brush holder 10 is made of a non-conductive material, and specifically, made of a synthetic resin material (eg, phenol, polypropylene, nylon, polyester). In addition, the brush holder 10 has a substantially frusto-conical base portion 11 and a bottomed cup-shaped bearing holding portion 12 protruding from the base portion 11. The end of the base 11 at one end in the axial direction is an open end, and the flange portion 10 a is provided at the outer edge of the open end. The bearing holding portion 12 is provided at the central portion of the brush holder 10 as shown in FIGS. 3 and 5 and accommodates and holds a bearing (not shown) for supporting the rotating shaft 5 therein. Further, in the top wall 12a of the bearing holding portion 12 (the end opposite to the opening of the brush holder 10), a circular hole-like through hole 12b for passing the rotation shaft 5 is formed.

  Moreover, the brush holder 10 has the brush accommodating part 13 and the terminal accommodating part 14 as shown in FIG. The brush accommodating portion 13 is a substantially rectangular parallelepiped portion of the brush holder 10 which protrudes from the base portion 11 and accommodates the brush 8 therein. Further, as shown in FIG. 5, the brush housing portion 13 obliquely extends from the outer surface of the bearing holding portion 12 toward the radially outer side of the brush holder 10 so as to approach the opening end of the brush holder 10. . The number of the brush accommodating portions 13 is the same as the number of the brushes 8, that is, two. Moreover, in the brush holder 10, each brush accommodating part 13 is arrange | positioned in the position mutually spaced apart about 90 degree | times, as shown in FIG. However, the arrangement position of each brush housing portion 13 is not limited to this, and can be set to any position, and for example, the brush housing portions 13 are arranged at positions approximately 180 degrees apart from each other. May be

  As shown in FIG. 3 and FIG. 5, the terminal accommodating portion 14 is a substantially step-like portion formed in the base portion 11, and the power supply terminal 9 is accommodated therein. The power supply terminal 9 is made of a plate of a conductive material (specifically, metal), and supplies power from an external power supply (not shown) to the brush 8 by connecting to an external connector (not shown). Strictly speaking, the power supply terminal 9 is provided for each of the anode and the cathode of the external power supply. The power supply terminal 9 on the anode side and the power supply terminal 9 on the cathode side are connected to the corresponding brush 8 among the two brushes 8. The two power supply terminals 9 are accommodated (inserted) in the terminal accommodating portion 14 in a state in which they are arranged side by side.

  In the present embodiment, as shown in FIG. 3, the arrangement position of the terminal accommodating portion 14 in the brush holder 10 is substantially equiangularly spaced (approximately 135 degrees) from each of the two brush accommodating portions 13 in the rotational direction. It is in position. However, the arrangement position of the terminal accommodating portion 14 is not limited to this, and can be set arbitrarily.

  As described above, the basic configuration of the motor 1 according to the present embodiment is substantially the same as the configuration of a known brush-equipped DC motor. On the other hand, the motor 1 according to the present embodiment includes the electromagnetic shield 20 in order to effectively remove noise (hereinafter referred to as high frequency noise) including a high frequency frequency band. It differs from DC motor. Hereinafter, the electromagnetic shield 20 will be described in detail.

  The electromagnetic shield 20 is a covering member that covers the outer surface of the brush holder 10 as shown in FIGS. 4 and 5. The electromagnetic shield 20 is made of a conductive material, and is made of a plate-like material of metal (specifically, iron) in the present embodiment. More specifically, the electromagnetic shield 20 according to the present embodiment is formed by cutting a single thin iron plate into a predetermined shape and bending it. The material of the electromagnetic shield 20 is not limited to iron, and may be a metal other than iron (for example, copper or nickel) or a conductive material other than metal.

  The electromagnetic shield 20 according to the present embodiment is configured to be detachable, and can be attached to an existing motor (strictly speaking, a motor having the brush holder 10 having the above-described structure).

  Also, when the electromagnetic shield 20 is attached to the brush holder 10, as shown in FIGS. 4 and 5, only a part of the outer surface of the brush holder 10 is covered. Specifically, as shown in FIG. 4, the electromagnetic shield 20 covers a portion of the outer surface of the brush holder 10 where the brush housing portion 13 is located and a portion where the terminal housing portion 14 is located. . In describing the contents in more detail, the shape of the electromagnetic shield 20 will be described. As shown in FIGS. 4 and 5, the electromagnetic shield 20 includes a washer-shaped first fragment portion 21 and second and third fragment portions 23 and 26 extending in a leg shape from the first fragment portion 21; Have.

  First, the first fragment 21 will be described. The first fragment 21 is a portion located at the central portion of the electromagnetic shield 20, and a circular hole having a size slightly larger than the outer edge of the rotation shaft 5 at the central position. A through hole 22 in the shape of a circle is formed. The rotating shaft 5 is to pass through the through hole 22 when assembling the motor 1.

  Further, in the state where the electromagnetic shield 20 is attached to the brush holder 10, as shown in FIG. 6, a portion of the outer surface of the brush holder 10 located on the top wall 12a of the bearing holding portion 12 The part 21 is in contact. That is, the first fragmented portion 21 covers an end portion of the outer surface of the brush holder 10 which is located on the side opposite to the motor yoke 2 in the axial direction. In the above state, the through holes 12 b formed in the top wall portion 12 a and the through holes 22 of the first fragmented portion 21 are arranged concentrically around the rotation axis 5.

  Next, the second fragmented portion 23 will be described. The second fragmented portion 23 is a substantially rectangular portion radially extending from the outer edge of the first fragmented portion 21 as shown in FIG. As it approaches the direction tip, it extends away from the first fragment 21 in the direction normal to the surface of the first fragment 21 (that is, the direction corresponding to the axial direction). Further, as shown in FIG. 5, the second fragmented portion 23 is diffracted and bent at a midway position to form a substantially arc-shaped bent portion 24. Furthermore, as shown in FIG. 5, the distal end portion of the second fragment portion 23 in the extension direction (hereinafter, the distal end portion 25) is folded in an L shape toward the center (inner side in the radial direction) of the electromagnetic shield 20 There is.

  In the present embodiment, a plurality of second fragmented portions 23 are provided in the brush holder 10, and specifically, the same number as the number of the brush accommodating portions 13 is provided.

  In the second fragment portion 23 configured as described above, when the electromagnetic shield 20 is attached to the brush holder 10, the brush accommodating portion 13 is positioned on the outer surface of the brush holder 10 as shown in FIG. Covers the portion (hereinafter referred to as the outer surface of the brush housing 13). That is, it can be said that the second fragmented portion 23 is a portion extended in the electromagnetic shield 20 so as to cover the outer surface of the brush housing portion 13. Further, in the present embodiment, the second fragmented portions 23 of the same number (specifically, two) as the brush accommodating portion 13 are provided, and each of the second fragmented portions 23 corresponds to that of the corresponding brush accommodating portion 13. Covers the outer surface. Here, as shown in FIG. 4, the second fragmented parts 23 are separated from each other in the rotational direction, and specifically, are arranged at positions shifted by about 90 degrees as in the case of the brush housing part 13. .

  Further, in the state where the electromagnetic shield 20 is attached to the brush holder 10, the bending portion 24 provided at the middle position in the extension direction of the second fragmented portion 23 is outside the brush accommodating portion 13 as shown in FIG. It is along the area | region (following, 1st area | region 13a) which makes the end surface of the brush accommodating part 13 in an axial direction in surface. That is, in the present embodiment, the extension direction midway portion of the second fragmented portion 23 is bent so as to fit the shape (relief) of the first region 13a. Thereby, the outer surface (strictly speaking, the first region 13 a) of the brush housing portion 13 is suitably covered by the second fragment portion 23.

  In the configuration illustrated in FIG. 6, the width (the width in the direction along the rotational direction) of the second fragment 23 so that the second fragment 23 covers the first region 13 a in the outer surface of the brush housing 13. Is substantially the same as the width of the first region 13a. On the other hand, the outer surface of the brush housing portion 13 includes a region adjacent to the first region 13a in the rotation direction, in other words, a second region 13b forming an end face of the brush housing portion 13 in the rotation direction. Therefore, if the portion of the second fragmented portion 23 that is approaching the brush housing portion 13 is made wider, it is possible to cover both the first area 13a and the second area 13b, as shown in FIG. Become. More specifically, the portion (hereinafter referred to as the wide portion 29) approaching the brush housing portion 13 is wider than the other portions, and the wide portion 29 is fitted to the outer surface of the brush housing portion 13 If it is bent in a letter shape (or a substantially U shape), the entire outer surface of the brush housing portion 13 can be covered. In other words, the first region 13a is covered by the first region cover portion 29a facing the first region 13a in the wide portion 29, and the second region 13b faces the second region 13b in the wide portion 29. To be covered by the second area cover portion 29b.

  Further, when the electromagnetic shield 20 is attached to the brush holder 10, the tip 25 folded back in an L-shape at the second fragmented part 23 is bent radially inward. Then, when the brush holder 10 to which the electromagnetic shield 20 is attached is assembled to the motor yoke 2, the above-described tip portion 25 is sandwiched between the flange portion 10 a of the brush holder 10 and the flange portion 2 a of the motor yoke 2. Become. As a result, the second fragmented portion 23 contacts the motor yoke 2, and as a result, the electromagnetic shield 20 including the second fragmented portion 23 is electrically connected to the motor yoke 2.

  Next, the third fragmented portion 26 will be described. The third fragmented portion 26 is a substantially rectangular portion radially extending from the outer edge of the first fragmented portion 21 as shown in FIG. As it approaches the direction tip, it extends away from the first fragment 21 in the direction normal to the surface of the first fragment 21 (that is, the direction corresponding to the axial direction). Further, as shown in FIG. 5, the third fragmented portion 26 is diffracted and bent at a midway position to form a substantially stepped bending portion 27. Furthermore, the distal end portion in the extension direction of the third fragment portion 26 (hereinafter, the distal end portion 28) is folded back in an L shape toward the outer side in the rotational direction (the direction away from the terminal accommodating portion 14).

  And, in the state where the electromagnetic shield 20 is attached to the brush holder 10, the third fragmented portion 26 is a portion where the terminal accommodating portion 14 is located in the outer surface of the brush holder 10 as shown in FIG. It covers the outer surface of the terminal accommodating portion 14). That is, it can be said that the third fragmented portion 26 is a portion extended in the electromagnetic shield 20 so as to cover the outer surface of the terminal accommodation portion 14.

  Further, in the state where the electromagnetic shield 20 is attached to the brush holder 10, the bending portion 27 provided at the middle position in the extension direction of the third fragmented portion 26 is, as shown in FIG. It is along the outer surface (strictly, the end face of the terminal accommodating portion 14 in the axial direction). That is, in the present embodiment, the middle portion in the extension direction of the third fragmented portion 26 is bent in a substantially step shape so as to fit the shape (relief) of the outer surface of the terminal accommodation portion 14. As a result, the outer surface of the terminal accommodation portion 14 is suitably covered by the third fragment portion 26.

  Further, when the electromagnetic shield 20 is attached to the brush holder 10, the pair of end portions 28 folded back in an L shape in the third fragmented portion 26 is outside in the rotational direction (a direction away from the terminal accommodating portion 14 It is bent towards). Then, when the brush holder 10 to which the electromagnetic shield 20 is attached is assembled to the motor yoke 2, the above-described tip end portion 28 is sandwiched between the flange portion 10 a of the brush holder 10 and the flange portion 2 a of the motor yoke 2 . As a result, the third fragmented portion 26 contacts the motor yoke 2, and as a result, the electromagnetic shield 20 including the third fragmented portion 26 is electrically connected to the motor yoke 2.

  In the electromagnetic shield 20 having the configuration described above, the rotary shaft 5 is inserted into the through hole 22 of the first fragmented portion 21, and the tip portion 25 of the second fragmented portion 23 and the tip portion of the third fragmented portion 26 28 is attached to the brush holder 10 by being held between the flange portion 10 a of the brush holder 10 and the flange portion 2 a of the motor yoke 2. And in the motor 1 of this embodiment, while covering the part in which the brush accommodating part 13 and the terminal accommodating part 14 are located among the outer surfaces of the brush holder 10 which consists of nonelectroconductive materials with the electromagnetic shield 20, the said electromagnetic shield 20 Are electrically connected to a motor yoke 2 made of a conductive material. As a result, the noise generated at the brush 8 and the power supply terminal 9 can be effectively shielded by the electromagnetic shield 20. As a result, it is possible to well suppress the propagation of noise from the motor 1 to peripheral devices.

  Further, in the motor 1 of the present embodiment, since the electromagnetic shield 20 partially covers the outer surface of the brush holder 10, the size and weight of the electromagnetic shield 20 are compared with a configuration in which the entire outer surface of the brush holder 10 is covered. Is smaller and the motor 1 is lighter and less expensive.

  Although one embodiment of the rotary electric machine of the present invention has been described above, the above embodiment is merely an example, and other embodiments can be considered. Specifically, in the above embodiment, the electromagnetic shield 20 is formed by cutting out and bending a single metal plate (thin iron plate) into a predetermined shape. In such a case, it is possible to prepare the electromagnetic shield 20 easily and at low cost. However, the present invention is not limited to this, and each part of the electromagnetic shield 20 (specifically, the first fragment portion 21, the second fragment portion 23, and the third fragment portion 26) is formed of separate materials, The electromagnetic shield 20 may be configured by finally combining these.

  Further, in the above embodiment, as an example of the rotary electric machine of the present invention, the brush-equipped DC motor with four poles and two brushes has been described as an example. However, the present invention is not limited to this, and the present invention is also applicable to a brushed DC motor such as a 4-pole 4-brush or a 6-pole 2-brush. That is, in the direct-current motor with a brush of such a configuration, the electromagnetic shield 20 is mounted so as to cover a portion of the outer surface of the brush holder 10 where the brush accommodating portion 13 and the terminal accommodating portion 14 are located.

  Moreover, in said embodiment, the brushed DC motor was mentioned as an example and demonstrated as an example of the rotary electric machine of this invention. However, the present invention is not limited to this, and the present invention is also applicable to rotating electrical machines (for example, alternators and the like) other than motors.

1 Motor (rotary electric machine)
2 Motor yoke (first housing member)
2a Flange 3 Armature (Rotary body)
DESCRIPTION OF SYMBOLS 4 permanent magnet 5 rotating shaft 6 core 7 commutator 8 brush 9 electric power supply terminal 10 brush holder (2nd accommodation member)
DESCRIPTION OF SYMBOLS 10a Flange part 11 Base 12 Bearing holding part 12a Top wall part 12b Through-hole 13 Brush accommodating part 13a 1st area | region 13b 2nd area | region 14 terminal accommodating part 20 electromagnetic shield (cover member)
21 first fragmented part 22 through hole 23 second fragmented part 24 bent part 25 tip part 26 third fragmented part 27 bent part 28 tip part 29 wide part 29a first area cover part 29b second area cover part

Claims (7)

A first accommodating member for accommodating the rotating body and made of a conductive material;
A second containing member assembled to the first containing member and made of a non-conductive material;
And a covering member partially covering the outer surface of the second containing member and made of a conductive material;
The second accommodating member includes a brush accommodating portion for accommodating a brush, and a terminal accommodating portion for accommodating a power feeding terminal provided to supply power to the brush.
The covering member covers a portion of the outer surface where the brush accommodating portion is located and a portion of the outer surface where the terminal accommodating portion is located, and is electrically connected to the first accommodating member It has been,
The rotating body has a rotating shaft,
The covering member is
A first fragment portion covering an end portion of the outer surface opposite to the first accommodation member in the axial direction of the rotation shaft;
A second fragment portion extending from the first fragment portion so as to cover a portion of the outer surface where the brush housing portion is located;
Rotating electric machine according to claim Rukoto that having a, a third fragment portion to which the terminal accommodating portion extending to cover the portion located out of the outer surface from said first fragment unit. The end in the extension direction of at least one of the second fragment portion and the third fragment portion is folded inward in the radial direction of the rotation shaft, or in one direction in the rotation direction of the rotation shaft Crooked,
The rotating electrical machine according to claim 1 , wherein the end in the extension direction is sandwiched between the first accommodation member and the second accommodation member. The second fragmented portion is bent along a portion of the outer surface where the brush accommodating portion is located,
The rotary electric machine according to claim 1 or 2 , wherein the third fragmented portion is bent along a portion of the outer surface where the terminal accommodating portion is located. In a portion of the outer surface where the brush housing portion is located, a first region forming an end surface of the brush housing portion in the axial direction and an end surface of the brush housing portion in the rotation direction of the rotating body And contains two areas,
The electric rotating machine according to any one of claims 1 to 3 , wherein the second fragmented portion covers both the first area and the second area. The second housing member includes a plurality of the brush housing portions,
The covering member has the same number of second fragments as the brush housing portion, and
The rotary electric machine according to any one of claims 1 to 4 , wherein the same number of the second fragmented portions as the brush housing portions are separated from one another in the rotational direction of the rotating body. The electric rotating machine according to any one of claims 1 to 5 , wherein a through hole through which the rotation shaft passes is provided in the first fragmented portion. The electric rotating machine according to any one of claims 1 to 6 , wherein the covering member is formed by processing a sheet of conductive plate-like material.

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