JP2010068661A - Dc rotating electrical machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotating electrical machine which is more suitable for use in a vehicle. <P>SOLUTION: The DC rotating electrical machine M1 includes: a rotor 22; a stator 21 including an armature that is disposed on the peripheral side of the rotor 22; a rectifier 14 including a plurality of segments 1 to 5 connected respectively to a plurality of terminals of a coil 20 making up the armature; a positive electrode feeding electrode 7 and a negative electrode feeding electrode 6; a positive electrode brush assembly 9, electrically connecting one of the segments 1 to 5 to the positive electrode feeding electrode 7; a negative electrode brush 8 electrically connecting a segment located opposite in the radial direction of the rotor 22, which is one of the segments, to the negative electrode feeding electrode 6; and a holder 25, connected in drive to the rotor 22 to hold the positive electrode brush assembly 9 and the negative electrode brush 8. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a direct current rotating electrical machine having a brush and a commutator, and relates to a so-called inner rotor type direct current rotating electrical machine having an armature disposed outside.

  Usually, in a DC rotating electric machine having a brush and a commutator, a configuration in which an armature is disposed inside and a rotor has an armature is generally used. In this case, the magnetic poles of the armature are connected to the stator and the armature. In order to rotate based on the relative rotation, a DC voltage is supplied to the armature using a brush and a commutator. In this case, since the brush is fixed to the stator side, it is easy to supply a DC voltage to the brush because an external wiring may be connected to the brush.

  However, as shown in FIG. 10, for example, in recent years, a so-called inner rotor type DC rotating electric machine in which the armature 100 is arranged outside and fixed to the stator and a magnet is provided on the outer peripheral surface of the rotor 150 is widely used. It has become like this. In the inner rotor type DC rotating electric machine having such a configuration, the brush 120 is drivingly coupled to the rotor 150 via the holder 140 in order to rotate the magnetic poles of the armature 100 based on the relative rotation between the stator and the rotor 150. Thus, it is necessary to supply a DC voltage from the brush 120 to the armature 100 via the commutator 110. In this case, since the brush 120 is always rotating with respect to the stator, the wiring from the outside needs to be connected to the brush 120 via the slip ring 130.

  In this way, in the inner rotor type DC rotating electric machine, it is necessary to provide the slip ring 130, and as shown in FIG. 10, each of the brush 120 on the positive electrode side and the brush 120 on the negative electrode side of the armature 100 is provided. A pair of slip rings 130 is required.

  Since these pair of slip rings 130 need to be arranged in parallel while maintaining an insulation distance in the axial direction of the rotor 150, the axial dimensions of the rotor 150 and the stator are increased, and the overall size of the DC rotating electric machine is increased. In addition, the use of the slip ring 130 causes an increase in the number of parts and an increase in cost.

For this reason, there arises a problem that an inner rotor type DC rotating electrical machine more suitable for in-vehicle use cannot be provided. As a technique for reducing the size of the inner rotor type DC rotating electric machine, for example, there is a technique described in Patent Document 1.
JP 2004-364494 A

  However, in such a conventional technique, a technique necessary for avoiding the use of the above-described slip ring 130 is not presented in the inner rotor type DC rotating electric machine, so that the above-described problems are solved. However, there has been a problem that it is still impossible to provide a DC rotating electrical machine that is more suitable for in-vehicle use.

  Accordingly, an object of the present invention is to provide a DC rotating electrical machine that is more suitable for use in a vehicle.

In order to solve the above problem, the DC rotating electrical machine according to the present invention is:
A rotor, a stator including an armature disposed on an outer peripheral side of the rotor, a commutator including a plurality of segments respectively connected to a plurality of terminals of a winding constituting the armature, a positive electrode feeding electrode, A negative electrode feeding electrode, a positive electrode brush assembly that electrically connects one segment of the plurality of segments and the positive electrode feeding electrode, and a radial direction of the rotor of the one segment among the plurality of segments A negative electrode brush electrically connecting the segment located on the opposite side and the negative electrode feeding electrode; and a holder that is drivingly coupled to the rotor and holds the positive electrode brush assembly and the negative electrode brush. To do.

  The rotor has a well-known configuration in the above-described inner rotor type DC rotating electric machine, and is provided with magnets having an appropriate number of poles arranged in parallel in the circumferential direction with or without being exposed to the outer peripheral surface. The positive electrode feeding electrode forms part of a positive terminal of a connector of the DC rotating electric machine, and the negative electrode feeding electrode forms a part of a negative terminal of the connector.

  When a DC voltage is externally applied to the positive terminal and the negative terminal, a magnetic field is generated by the winding included in the armature, and the magnetic field and the magnet of the rotor are attracted and repelled to rotate the rotor. The As the rotor rotates, the holder rotates, so that one segment of the plurality of segments to which the positive electrode power supply electrode is electrically connected by the positive electrode brush assembly and the negative electrode power supply electrode are The combination of the one segment that is electrically doubled by the negative electrode brush and the segment located on the opposite side in the radial direction of the rotor are sequentially switched.

  As a result, the energized windings of the armature windings are sequentially switched to rotate the magnetic field generated by the armature windings, and the magnets of the rotor are continuously applied to the rotated magnetic fields. The rotor is continuously rotated by repelling.

  That is, according to the present invention, the positive brush assembly electrically connects one of the plurality of segments to the positive electrode feeding electrode, and the negative brush is opposite to the one segment in the radial direction of the rotor. Since the segment located on the side and the negative electrode feeding electrode are electrically connected, when applying a DC voltage to the armature via the commutator, a slip ring as in the prior art can be eliminated. .

  That is, in the prior art, when the slip ring is provided, the axial dimension of the rotor and the stator must be increased in parallel with the insulation distance in the axial direction of the rotor. According to the present invention, since the slip ring can be abolished, the necessity of the axial arrangement of the slip ring itself is eliminated and the increase in size is prevented. Can do.

  Furthermore, since the slip ring can be eliminated, it is possible to prevent an increase in the number of parts and an increase in cost. That is, according to the present invention, it is possible to provide an inner rotor type DC rotating electrical machine that is more suitable for use in a vehicle.

Here, as a specific aspect in the DC rotating electrical machine,
The commutator includes a positive electrode power supply electrode and a negative electrode power supply electrode, and the positive brush assembly or the negative electrode brush contacts each of the plurality of segments, the positive electrode power supply electrode, and the negative electrode power supply electrode. It is preferable that the contacted surface is arranged on a plane perpendicular to the central axis of the rotor.

  According to this, since the contacted surface of the segment, the contacted surface of the positive electrode feeding electrode, and the contacted surface of the negative electrode feeding electrode can be arranged on the plane, the segment, the positive electrode feeding The electrode for power supply and the electrode for negative electrode power feeding can be constituted by a bus bar, and the commutator can be integrally formed by resin molding. As a result, the segments, the positive electrode feeding electrode, and the negative electrode feeding electrode can be collectively arranged to reduce the size of the electrical component and simplify the manufacturing process.

Furthermore, in the DC rotating electric machine,
It is preferable that the contacted surfaces of the plurality of segments are arranged on the inner peripheral side of the contacted surfaces of the positive electrode feeding electrode and the negative electrode feeding electrode.

  That is, as described above, the positive electrode feeding electrode is formed of a bus bar and a part thereof is used as a positive terminal of the connector, and the negative electrode feeding electrode is formed of a bus bar and a part thereof is used as a negative terminal of the connector. In this case, since the connector is located on the outer peripheral side of the stator constituting the DC rotating electric machine, the radial lengths of the positive electrode feeding electrode and the negative electrode feeding electrode can be shortened as much as possible. it can.

  As a result, the radial separation distance between the connector and the contact surface of the positive electrode feeding electrode or the negative electrode feeding electrode is shortened as much as possible. The radial dimension of the electric machine can be made as small as possible. In addition, it is possible to realize a more advantageous configuration in terms of the fitting between the electrical components that constitute the DC rotating electric machine.

Here, in the DC rotating electrical machine,
It is preferable that the contact surfaces of the positive electrode feeding electrode and the negative electrode feeding electrode are configured in an annular shape extending in the circumferential direction of the commutator.

  According to this, since the positive electrode feeding electrode, the negative electrode feeding electrode, and the segment can be arranged in parallel in the radial direction on the plane, the electrical component for applying a DC voltage to the armature can be used as an axis. By avoiding the necessity of paralleling in the direction, an increase in the axial dimension of the DC rotating electrical machine can be suppressed, and an increase in size and cost can be suppressed.

Furthermore, in the DC rotating electric machine,
The contacted surface of the negative electrode feeding electrode is preferably disposed on the inner peripheral side of the contacted surface of the positive electrode feeding electrode.

  According to this, the positive electrode brush assembly that electrically connects the positive electrode feeding electrode and the segment can have the following advantageous configuration.

That is, in the DC rotating electric machine,
The positive brush assembly includes a power supply brush that contacts the positive electrode power supply electrode, a connection brush that contacts the segment, a brush holder that holds the power supply brush and the connection brush insulated from each other, and the power supply brush And a connection member for electrically connecting the connection brush, and the connection member may be disposed on the opposite side of the brush holder from the side holding the power supply brush or the connection brush.

  According to this, when both the power supply brush and the connection brush exceed the wear limit and the wear proceeds, the connection member is attached to the brush holder on the side in contact with the positive electrode power supply electrode and the negative electrode power supply electrode. Is not provided, it is possible to prevent the positive electrode feeding electrode and the negative electrode feeding electrode from being short-circuited. As a result, it is possible to prevent electrical problems associated with disposing the negative electrode feeding electrode and the positive electrode feeding electrode adjacent to each other in the radial direction.

Furthermore, in the DC rotating electric machine,
It is preferable that a contact pressure spring is interposed between the brush holder and the holder and between the negative electrode brush.

  According to this, the contact of the positive electrode brush assembly with the positive electrode power supply electrode and the segment and the contact of the negative electrode brush with the negative electrode power supply electrode and the segment can be made more reliable.

Alternatively, in the DC rotating electric machine,
A contact pressure spring may be interposed between the holder and the power supply brush and the connection brush, and between the holder and the negative electrode brush.

  According to this, a guide that passes through the inner peripheral side of the contact pressure spring can be formed on the side opposite to the contact surface of each of the power supply brush and the connection brush constituting the positive electrode brush assembly. The shape of the brush holder can be simplified.

  Further, the contact pressure spring can apply an urging force independently of each of the power supply brush and the connection brush, so that the contact pressure of the power supply brush when contacting the positive electrode power supply electrode and the connection brush The contact pressure at the time of contact with the segment can be uniformly applied.

Furthermore, in the DC rotating electric machine,
It is preferable that a circumferential end of a contact surface that contacts the segment of the connection brush and / or the negative electrode brush coincides with a radial direction of the rotor.

  That is, as a well-known configuration of the DC rotating electric machine, the plurality of segments have a fan shape obtained by dividing a ring in the commutator at equal intervals in the circumferential direction, and an insulating resin or a circumferential direction is provided between adjacent segments. The gap is provided.

  In such a configuration, when the connection brush and / or the negative electrode brush moves between the adjacent segments in the circumferential direction as the rotor rotates, the circumferential end of the contact surface is the circumference of the segment. Since the contact is made or separated at the same time at any position in the radial direction and at the radial end, the generated spark is dispersed in the radial direction to prevent it from being concentrated in one place, and the connection brush and / or It is possible to suppress wear of the negative electrode brush, extend the life, and reduce the running cost.

  The power supply brush, the connection brush, and the negative electrode brush described above may be any metal brush.

  ADVANTAGE OF THE INVENTION According to this invention, a more suitable direct current | flow rotary electric machine for vehicle-mounted use can be provided.

  The best mode for carrying out the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a schematic view showing an embodiment of a DC rotating electric machine according to the present invention. FIG. 2A is a schematic diagram showing a commutator of an embodiment of a DC rotating electric machine according to the present invention as viewed in AA in FIG. 1, and FIG. 2B is an embodiment of the DC rotating electric machine according to the present invention. FIG. 2 is a schematic view showing a commutator of a form in a cross section including a central axis O. FIG. 3 is a schematic diagram showing a wiring form of electric parts in one embodiment of the DC rotating electric machine according to the present invention.
FIG. 1 is a schematic diagram showing a first embodiment of a DC rotating electric machine according to the present invention.

  As shown in FIG. 1, the DC rotating electric machine M1 according to the first embodiment includes a rotor 22 in which magnets are arranged in the circumferential direction and a stator 21 disposed on the outer peripheral side of the rotor 22. Is wound around a core (not shown). The rotor 22 is drivingly coupled to a shaft 23, and the shaft 23 is rotatably supported with respect to the stator 21 by a plurality of bearings shown in FIG.

  A commutator (commutator) 14 is fixedly disposed on the inner peripheral side of the stator 21 in the axial direction of the rotor 22, that is, on the left side in FIG. 1, and further on the left side of the commutator 14 in FIG. A disc-shaped holder 25 that is drive-coupled via is arranged.

  On the surface of the holder 25 facing the commutator 14, the negative brush 8 and the positive brush assembly 9 are arranged on the diameter of the holder 25 so that they are located on opposite sides in the radial direction. A contact pressure spring 15 is interposed between the negative electrode brush 8 and the holder 25, and a contact pressure spring 15 is also interposed between the positive electrode brush assembly 9 and the holder 25.

  As shown in FIG. 3, the winding 20 constituting the armature is provided with a plurality of terminals, and a plurality of segments 1 to 5 are respectively connected to the plurality of terminals as shown in FIG. The These segments 1 to 5 are formed by pressing a bus bar made of a conductor such as copper, for example, and as shown in FIG. 2A, the ring is divided into five parts on the surface facing the holder 25 of the commutator 14 as shown in FIG. It is formed so as to form a fan shape.

  Further, as shown in FIG. 2A, on the surface of the commutator 14 facing the holder 25, a bus bar made of a conductor such as copper is press-molded, and the positive electrode brush assembly 9 of the positive electrode feeding electrode 7 is pressed. And the contacted surface with which the negative electrode brush 8 of the negative electrode feeding electrode 6 contacts are configured in an annular shape extending in the circumferential direction of the commutator 14.

  In addition, the contacted surface with which the negative electrode brush 8 of the negative electrode feeding electrode 6 contacts is arranged on the inner peripheral side of the contacted surface with which the positive electrode brush assembly 9 of the positive electrode feeding electrode 7 contacts. The contacted surfaces with which the negative electrode brush 8 and the positive electrode brush assembly 9 of the plurality of segments 1 to 5 are in contact are arranged on the inner peripheral sides of the contacted surfaces of the positive electrode feeding electrode 7 and the negative electrode feeding electrode 6.

  As shown in FIG. 2, the commutator 14 includes a positive electrode feeding electrode 7 and a negative electrode feeding electrode 6. The positive electrode in each of the plurality of segments 1 to 5, the positive electrode feeding electrode 7, and the negative electrode feeding electrode 6. The contacted surface with which the brush assembly 9 or the negative electrode brush 8 comes into contact is disposed on a plane perpendicular to the central axis O of the rotor 22.

  The contact surface of the positive electrode feeding electrode 7 is formed in an annular shape as shown in FIG. 2 (a), and the portion extending from the contact surface toward the upper side in FIG. A positive electrode side terminal 10 is configured. Similarly, the contacted surface of the negative electrode feeding electrode 6 is formed in an annular shape as shown in FIG. 2A, and extends radially outward from the contacted surface upward in FIG. 2B. The extending portion constitutes the negative electrode side terminal 11.

  The positive electrode side terminal 10 and the negative electrode side terminal 11 are formed so as to protrude toward the inner peripheral side of a bottomed cylindrical connector housing 13 provided on the outer peripheral side of the commutator 14 to constitute a connector. The positive terminal 10 is connected to a control terminal of a body ECU (Electronic Control Unit) (not shown), for example, and the negative terminal 11 is connected to a ground terminal.

  The yoke 12 and the connector housing 13 constituting the disk-shaped portion of the commutator 14 are formed by integrally molding the resin after the segments 1 to 5, the negative electrode feeding electrode 6 and the positive electrode feeding electrode 7 are arranged in the above-described positional relationship. Composed.

  Further, as shown in FIG. 2A, the DC rotating electrical machine M <b> 1 according to the first embodiment includes the positive electrode brush assembly 9 and the negative electrode brush 8 on the surface of the holder 25 facing the commutator 14.

  As shown in FIG. 2A, the positive electrode brush assembly 9 has a diameter equal to that of one segment 1 among the plurality of segments 1 to 5 in the relative positional relationship between the commutator 14 and the positive electrode brush assembly 9. The segment 3 located on the opposite side of the direction and the positive electrode feeding electrode 7 are electrically connected.

  As shown in FIG. 2A, the negative electrode brush 8 has one segment 1 out of the plurality of segments 1 to 5 and the negative electrode feeding electrode 6 in the circumferential relative positional relationship between the commutator 14 and the negative electrode brush 8. And electrically connect.

  Below, the specific structure of the positive electrode brush assembly 9 and the negative electrode brush 8, and the specific aspect of those installation with respect to the holder 25 are demonstrated using figures. FIG. 4 is a schematic diagram showing a specific structure of the positive electrode brush assembly 9 in one embodiment of the DC rotating electrical machine M1 according to the present invention. FIG. 5 is a schematic diagram showing a specific structure of the negative electrode brush 8 in one embodiment of the DC rotating electrical machine M1 according to the present invention.

  FIG. 6 is a schematic diagram showing the form of the contact surfaces of the positive electrode brush assembly 9 and the negative electrode brush 8 of the commutator 14 of the DC rotating electrical machine M1 according to the embodiment of the present invention. FIG. 7 is a schematic view showing a connection state of the holder 25, the positive brush assembly 9, and the negative brush 8 by the contact pressure spring 15 according to the embodiment of the DC rotating electrical machine M1 according to the present invention.

  First, the positive electrode brush assembly 9 will be described. 4A shows a view of the positive electrode brush assembly 9 viewed from the circumferential direction of the holder 25, and FIG. 4B shows a view of the positive electrode brush assembly 9 viewed from the commutator 14 side. 4 (c) shows a CC cross section in FIG. 4 (b). 4A, 4B, and 4C, the positive electrode brush assembly 9 includes a power supply brush 50, a connection brush 51, a short-circuit plate (connection member) 52, and a brush holder 53. The

  The power supply brush 50 has a function of contacting the positive electrode power supply electrode 7, and the contact surface of the commutator 14 on the positive electrode power supply electrode 7 has a rectangular shape as shown in FIG. On the opposite side, a pin shape 50 a that fits into a hole of the brush holder 53 is configured.

  The connection brush 51 has a function of contacting the segments 1 to 5, and the contact surface with respect to the segments 1 to 5 has a trapezoidal shape in which the upper base is larger than the lower base, as shown in FIG. The extending direction of the circumferential end connecting the upper base and the lower base is made to coincide with the radial directions RP and TS of the fan-shaped segments 1 to 5 of the commutator 14 shown in FIG. As shown in FIGS. 4A and 4C, a pin shape 51 a that fits into the hole of the holder 25 is formed on the side opposite to the contact surface of the connection brush 51. The radial directions RP and TS also coincide with the radial direction of the rotor 22. That is, the contacted surface by contact of the connection brush 51 of the segments 1 to 5 of the commutator 14 is as shown in FIG.

  As shown in FIG. 4C, the brush holder 53 is made of an insulating resin, and two holes into which the power supply brush 50 and the connection brush 51 are fitted are formed at both ends in the radial direction on the surface facing the commutator 14. The power supply brush 50 is fitted in the upper hole in FIG. 4C, and the connection brush 51 is fitted in the lower hole, so that the brush holder 53 is connected to the power supply brush 50 and the connection brush. 51 are held insulated from each other.

  A pin shape 53a for connecting to the holder 25 via the contact pressure spring 15 is formed on the side opposite to the surface facing the commutator 14 of the brush holder 53, and the brush holder 53 of FIG. The cross-sectional shape is T-shaped with the upper side directed to the right side, that is, the commutator 14 side.

  The short-circuit plate 52 is installed on the back surface opposite to the surface facing the commutator 14 of the brush holder 53, that is, on the opposite side of the brush holder 53 from the side holding the power supply brush 50 or the connection brush 51. A connection member for electrically connecting the connection brush 51 is configured. The short-circuit plate 52 is provided with two through holes corresponding to the holes of the brush holder 53.

  Next, the negative electrode brush 8 will be described. 5A shows a view of the negative electrode brush 8 viewed from the circumferential direction of the holder 25, and FIG. 5B shows a view of the negative electrode brush 8 viewed from the commutator 14 side. FIG. c) shows an EE cross section in FIG.

  As shown in FIG. 5B, the negative electrode brush 8 has a contact surface with the commutator 14 having a hexagonal shape including a lower rectangular shape and an upper trapezoidal shape, and is a surface facing the commutator 14 of the negative electrode brush 8. On the opposite side, a pin shape 8a for connecting to the holder 25 via the contact pressure spring 15 is formed. In FIG. 5C, the cross-sectional shape of the negative electrode brush 8 is the upper side on the right side, that is, the commutator 14 side. T-shape oriented to

  The upper side of the contact surface of the negative electrode brush 8 in FIG. 5B, that is, the trapezoidal portion on the inner peripheral side has a function of contacting the segments 1 to 5, and is an extension of the circumferential end connecting the upper base and the lower base. The present direction is made to coincide with the radial directions RP and TS of the fan-shaped segments 1 to 5 of the commutator 14 shown in FIG. Further, the rectangular portion on the lower side in FIG. 5B, that is, the outer peripheral side of the negative electrode brush 8 has a function of contacting the negative electrode feeding electrode 6. That is, the contact surface by the contact of the negative electrode brush 8 of the segments 1 to 5 of the commutator 14 is as shown in FIG.

  In the DC rotating electrical machine M1 of the first embodiment described above, when a DC voltage is applied from the body ECU to the positive terminal 10 and the negative terminal 11 shown in FIG. Then, the magnetic field generated by the core and the magnet of the rotor 22 are attracted and repelled, and the rotor 22 is rotated. As the rotor 22 rotates, the holder 25 fastened to the shaft 23 is also rotated, and one segment of the plurality of segments 1 to 5 to which the positive electrode feeding electrode 7 is electrically connected by the positive electrode brush assembly 9 The combination of one segment to which the negative electrode power feeding electrode 6 is electrically connected by the negative electrode brush 8 and the segment located on the opposite side in the radial direction of the rotor 22 or the commutator 14 is sequentially switched.

  As a result, the energized windings 20 of the armature windings 20 provided in the stator 21 are sequentially switched, and the magnetic field generated by the armature windings 20 is also rotated. The magnet 22 is continuously attracted and repelled, and the rotor 22 is continuously rotated.

  According to the DC rotating electrical machine M1 of the first embodiment described above, the following operational effects can be obtained. That is, the positive electrode brush assembly 9 electrically connects one segment among the plurality of segments 1 to 5 to the positive electrode feeding electrode 7, and the negative electrode brush 8 is opposite to the one segment and the rotor 22 or the commutator 14 in the radial direction. And the negative electrode feeding electrode 6 can be electrically connected without using a slip ring as in the prior art.

  For this reason, in the prior art, a slip ring is required to apply a DC voltage to the armature winding. In addition, two slip rings are arranged in parallel in the axial direction of the rotor 22 while maintaining an insulation distance. However, according to the direct current rotating electrical machine M1 of the first embodiment, the slip ring is used. Therefore, the necessity of the arrangement of the two slip rings in the axial direction itself can be eliminated, and the increase in the size of the DC rotating electric machine M1 itself can be prevented.

  Furthermore, since the slip ring can be eliminated, it is possible to prevent an increase in the number of parts and an increase in cost. Accordingly, the DC rotating electrical machine M1 according to the first embodiment can provide a structure of an inner rotor type DC rotating electrical machine that is more suitable for in-vehicle use than the related art.

  Further, in the DC rotating electrical machine M1 of the first embodiment, as described above, the commutator 14 includes the positive electrode feeding electrode 7 and the negative electrode feeding electrode 6, the contacted surfaces of the plurality of segments 1 to 5, and the positive electrode feeding. Since the contacted surface of the electrode 7 and the contacted surface of the negative electrode feeding electrode 6 are arranged on a plane perpendicular to the central axis O of the rotor 22, the following advantageous effects are obtained. It is done.

  That is, the segments 1 to 5, the positive electrode feeding electrode 7, and the negative electrode feeding electrode 6 are each formed by press molding a bus bar, arranged at a predetermined position, and then molded without resin for molding. Thus, the commutator 14 can be formed integrally. As a result, the intensive arrangement and integration of the segments 1 to 5, the positive electrode feeding electrode 7 and the negative electrode feeding electrode 6 are realized, the electric parts are made compact, and the commutator 14 and thus the entire DC rotating electrical machine M1 is manufactured. It is possible to simplify the process.

  Further, in the DC rotating electrical machine M1 of the first embodiment, the contacted surfaces of the plurality of segments 1 to 5 are arranged on the inner peripheral side of the contacted surfaces of the positive electrode feeding electrode 7 and the negative electrode feeding electrode 6. Therefore, when the positive electrode feeding electrode 7 is constituted by a bus bar and a part thereof is used as the positive terminal 10, and the negative electrode feeding electrode 6 is constituted by the bus bar and a part thereof is used as the negative electrode side terminal 11, the following points are provided. It will be advantageous.

  That is, since the connector housing 13 constituting the connector is located on the outer peripheral side of the stator 21 constituting the DC rotating electrical machine M1, the portion constituting the positive terminal 10 of the positive electrode 7 and the negative electrode of the negative electrode 6 are provided. The radial lengths of the portions constituting the side terminal 11 can be made as short as possible.

  That is, the annular contact surface of the connector and the positive electrode feeding electrode 7 and the annular contact surface of the negative electrode feeding electrode 6 are made as close as possible in the radial direction, thereby also collecting the electrical components in the radial direction. Can be achieved. That is, in the DC rotating electrical machine M1 of the first embodiment, the radial dimension can be made as small as possible. In addition, the distance between the electrical components constituting the DC rotating electrical machine M1 can be made as small as possible to make it easy to secure the equipment space.

  Further, since the contact surfaces of the positive electrode feeding electrode 7 and the negative electrode feeding electrode 6 are formed in an annular shape extending in the circumferential direction of the commutator 14, the positive electrode feeding electrode 7, the negative electrode feeding electrode 6 and the segment 1 ˜5 can be juxtaposed in the radial direction on a plane perpendicular to the central axis O. Thus, it is possible to avoid the necessity of paralleling the electrical components in the axial direction when applying a DC voltage to the winding 20 constituting the armature, and to suppress an increase in the axial dimension of the DC rotating electrical machine M1, It is possible to prevent an increase in size and cost.

  Further, by configuring the positive electrode brush assembly 9 as described above, the commutator 14 and the brush holder 53 are in direct contact with each other in a situation where the power supply brush 50 and the connection brush 51 both exceed the wear limit and wear has progressed. Even in such a case, since the short-circuit plate 52 for electrically connecting the power supply brush 50 and the connection brush 51 in the positive electrode brush assembly 9 is provided on the back side, the positive electrode power supply electrode 7 and the negative electrode power supply electrode 6 are provided. Thus, it is possible to avoid contact of the short-circuit plate 52.

  Thereby, it is possible to prevent the positive electrode feeding electrode 7 and the negative electrode feeding electrode 6 from being short-circuited by the positive electrode brush assembly 9 even when the power supply brush 50 and the connection brush 51 are worn beyond the wear limit. . As a result, it is possible to prevent electrical problems associated with disposing the negative electrode feeding electrode 6 and the positive electrode feeding electrode 7 adjacent to each other in the radial direction.

  Further, when the contact pressure spring 15 is interposed between the brush holder 53 and the holder 25 and between the negative electrode brush 8, the power supply brush 50 of the positive electrode brush assembly 9 comes into contact with the positive electrode power supply electrode 7. It is possible to reliably ensure that the connection brush 51 contacts the segments 1 to 5 and that the negative electrode brush 8 contacts the negative electrode feeding electrode 6 and the segments 1 to 5.

  Further, in the DC rotating electrical machine M1 of the first embodiment, the contact surface of the connection brush 51 and the contact surface on the upper side in FIG. 4 of the negative electrode brush 8, that is, the contact surface on the inner periphery side are trapezoidal, and the circumferential end of the contact surface is the rotor. 22 and the commutator 14 are aligned with each other in the radial direction, and the connection brush 51 and the negative brush 8 are transferred between the segments 1 to 5 adjacent in the circumferential direction as the rotor 22 rotates. Advantageous effects can be obtained.

  That is, in performing the rectifying action accompanying the rotation of the rotor 22, the circumferential ends of the contact surfaces of the contact brush 51 and the negative brush 8 are at any position in the radial direction with respect to the circumferential ends of the segments 1 to 5. They can be contacted or separated at the same time. Thereby, it is possible to prevent the sparks generated due to contact or separation from being dispersed in the radial direction of the circumferential ends of the contact surfaces of the contact brush 51 and the negative electrode brush 8 and to concentrate on one place. That is, it is possible to suppress the wear of the connection brush 51 and the negative electrode brush 8 due to sparks, extend the life as an electrical component, and reduce the running cost.

  In the first embodiment described above, the brush holder 53 of the positive electrode brush assembly 9 is connected to the holder 25 via the contact pressure spring 15. However, the power supply brush 50 and the connection brush of the positive electrode brush assembly 9 are included. Each of 51 can be made independent and connected to the holder 25 by a contact pressure spring. The second embodiment will be described below.

  FIG. 8 is a schematic diagram showing the structure of the positive electrode brush assembly in one embodiment of the DC rotating electric machine according to the present invention. FIG. 9 is a schematic diagram showing a connection mode of the holder, the positive electrode brush assembly, and the negative electrode brush by a contact pressure spring of an embodiment of the DC rotating electric machine according to the present invention.

  In addition, since it is the same as that of what was shown in Example 1 except the part concerning the positive electrode brush assembly of a DC rotary electric machine, the overlapping description is omitted.

  In the DC rotating electrical machine M1 of the second embodiment, the positive electrode brush assembly 70 has the following configuration. 8A shows a view of the positive electrode brush assembly 70 viewed from the circumferential direction of the holder 25, and FIG. 8B shows a view of the positive electrode brush assembly 70 viewed from the commutator 14 side. 8 (c) shows a DD cross section in FIG. 8 (b). As shown in FIGS. 8A, 8 </ b> B, and 8 </ b> C, the positive electrode brush assembly 70 includes a power supply brush 60, a connection brush 61, a short-circuit plate (connection member) 62, and a brush holder 63. The

  As in the first embodiment, the power supply brush 60 has a function of contacting the positive electrode power supply electrode 7, and the contact surface of the commutator 14 on the positive electrode power supply electrode 7 is as shown in FIG. Is formed in a rectangular shape, and is inserted into the hole of the holder 25 on the side opposite to the contact surface, and the diameter decreases toward the opposite side connected to the holder 25 via the contact pressure spring 64. A pin shape 60a having a two-stage diameter is configured.

  The connecting brush 61 has a function of contacting the segments 1 to 5, and the contact surface with respect to the segments 1 to 5 has a trapezoidal shape in which the upper base is larger than the lower base, as shown in FIG. The extending direction of the circumferential end connecting the upper base and the lower base is made to coincide with the radial directions RP and TS of the fan-shaped segments 1 to 5 of the commutator 14 shown in FIG. As shown in FIGS. 8A and 8C, the opposite side to the contact surface of the connection brush 61 is inserted through the hole of the holder 25 and connected to the holder 25 via the contact pressure spring 64. A pin shape 61a having a two-stage diameter is formed such that the diameter decreases toward the center.

  As shown in FIG. 8C, the brush holder 63 is made of an insulating resin, and two holes through which the power supply brush 60 and the connection brush 61 are inserted are located at both ends in the radial direction on the surface facing the commutator 14. It is molded to The power supply brush 60 is inserted into the upper hole in FIG. 8C and the connection brush 61 is inserted into the lower hole, whereby the brush holder 63 holds the power supply brush 60 and the connection brush 61 in an insulated manner.

  The short-circuit plate 62 is disposed on the back surface of the brush holder 63 opposite to the surface facing the commutator 14, that is, the short-circuit plate 62 is disposed on the opposite side of the brush holder 63 from the side holding the power supply brush 60 or the connection brush 61. The connecting member that electrically connects the power supply brush 60 and the connection brush 61 is configured. The short-circuit plate 62 is provided with two through holes corresponding to the holes of the brush holder 63.

  As described above, in the second embodiment, the contact pressure spring 64 is interposed between the holder 25 and the power supply brush 60 and the connection brush 61, and the contact pressure spring 15 is interposed between the holder 25 and the negative electrode brush 8. It is going to be done.

  According to this, the pin shape 60a can be formed on the opposite side of the contact surface in the power supply brush 60 as a guide for inserting the inner peripheral side of the contact pressure spring 64. Similarly, the contact surface in the connection brush 61 Since the pin shape 61a as a guide for inserting the inner peripheral side of the contact pressure spring 64 can be formed on the opposite side, the shape of the brush holder 63 can be simplified.

  In addition, since the contact pressure spring 64 applies an urging force independently of each of the power supply brush 60 and the connection brush 61, the surface pressure when the power supply brush 60 contacts the positive electrode power supply electrode 7, and the connection brush 61. Regardless of the posture of the brush holder 63, the surface pressure upon contact with the segments 1 to 5 can be uniformly applied.

  Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various modifications and substitutions can be made to the above-described embodiments without departing from the scope of the present invention. Can do.

  The present invention relates to a direct current rotating electrical machine applied to an automobile memory seat system, a power window device, a sunroof device, a power steering device, and the like, and can provide a more appropriate direct current rotating electrical machine for in-vehicle use. It is applicable to various automobiles and is useful.

It is a mimetic diagram showing one embodiment of a direct current rotating electrical machine concerning the present invention. It is a schematic diagram which shows one Embodiment of the DC rotary electric machine concerning this invention in the AA view in FIG. It is a schematic diagram which shows the wiring form of the electrical component in one Embodiment of the direct current | flow rotary electric machine concerning this invention. It is a schematic diagram which shows the structure of the positive electrode brush assembly in one Embodiment of the DC rotary electric machine concerning this invention. It is a schematic diagram which shows the structure of the negative electrode brush in one Embodiment of the DC rotary electric machine concerning this invention. It is a schematic diagram which shows the form of the to-be-contacted surface with respect to the positive electrode brush assembly and negative electrode brush of the commutator of one Embodiment of the direct current | flow rotary electric machine concerning this invention. It is a schematic diagram which shows the connection aspect by the contact pressure spring of the holder of one Embodiment of the DC rotary electric machine concerning this invention, a positive electrode brush assembly, and a negative electrode brush. It is a schematic diagram which shows the structure of the positive electrode brush assembly in one Embodiment of the DC rotary electric machine concerning this invention. It is a schematic diagram which shows the connection aspect by the contact pressure spring of the holder of one Embodiment of the DC rotary electric machine concerning this invention, a positive electrode brush assembly, and a negative electrode brush. It is a schematic diagram which shows the conventional DC rotary electric machine.

Explanation of symbols

M1 DC rotating electric machine 1 to 5 segment 6 negative electrode feeding electrode 7 positive electrode feeding electrode 8 negative electrode brush 9 positive electrode brush assembly 10 positive electrode side terminal 11 negative electrode side terminal 12 yoke 13 connector housing 14 commutator (commutator)
15 Contact pressure spring 20 Winding 21 Stator 22 Rotor 23 Shaft 25 Holder 50 Power supply brush 51 Connection brush 52 Short-circuit plate (connection member)
53 Brush holder 70 Positive electrode brush assembly 60 Power supply brush 61 Connection brush 62 Short-circuit plate (connection member)
63 Brush holder 64 Contact pressure spring

Claims (9)

  A rotor, a stator including an armature disposed on an outer peripheral side of the rotor, a commutator including a plurality of segments respectively connected to a plurality of terminals of a winding constituting the armature, a positive electrode feeding electrode, A negative electrode feeding electrode, a positive electrode brush assembly that electrically connects one segment of the plurality of segments and the positive electrode feeding electrode, and a radial direction of the rotor of the one segment among the plurality of segments A negative electrode brush electrically connecting the segment located on the opposite side and the negative electrode feeding electrode, and a holder that is drivingly coupled to the rotor and holds the positive electrode brush assembly and the negative electrode brush. DC rotating electric machine.   The commutator includes a positive electrode power supply electrode and a negative electrode power supply electrode, and the positive brush assembly or the negative electrode brush contacts each of the plurality of segments, the positive electrode power supply electrode, and the negative electrode power supply electrode. The DC rotating electrical machine according to claim 1, wherein the contacted surface is disposed on a plane perpendicular to the central axis of the rotor.   The DC rotating electrical machine according to claim 2, wherein the contacted surfaces of the plurality of segments are arranged on an inner peripheral side of the contacted surfaces of the positive electrode feeding electrode and the negative electrode feeding electrode.   The DC rotating electric machine according to claim 2 or 3, wherein the contacted surfaces of the positive electrode feeding electrode and the negative electrode feeding electrode are formed in an annular shape extending in a circumferential direction of the commutator.   5. The DC rotating electric machine according to claim 4, wherein the contacted surface of the negative electrode feeding electrode is arranged on an inner peripheral side of the contacted surface of the positive electrode feeding electrode.   The positive brush assembly includes a power supply brush that contacts the positive electrode power supply electrode, a connection brush that contacts the segment, a brush holder that holds the power supply brush and the connection brush insulated from each other, and the power supply brush And a connecting member for electrically connecting the connecting brush, and the connecting member is disposed on a side of the brush holder opposite to the side holding the power supply brush or the connecting brush. The direct current rotating electrical machine described in 1.   The DC rotating electric machine according to claim 6, wherein a contact pressure spring is interposed between the brush holder and the holder and between the negative electrode brush.   The DC rotating electric machine according to claim 6, wherein a contact pressure spring is interposed between the holder and the power supply brush and the connection brush, and between the holder and the negative electrode brush.   The direct current according to claim 5, wherein a circumferential end of a contact surface that contacts the segment of the connection brush and / or the negative electrode brush coincides with a radial direction of the rotor. Rotating electric machine.

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