JP2014225979A - Slip ring device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a slip ring device capable of facilitating cooling of a brush.SOLUTION: A slip ring device 10A has units U1 to U3 including brushes 12a to 12c contacting with ring members 11a to 11c and outer bus bars 14a to 14c having terminal parts 15a to 15c, to which electric wires 17a to 17c are connected, and connected with brush holders 13a to 13c holding the brushes 12a to 12c. The units U1 to U3 are stored in a case 8b and an insulation cover 9 is provided between the units U1 to U3 and the case 8b. A space S is provided between the insulation cover 9 and the case 8b, and heat exchange members 22, each of which is disposed in the space S protruding from the insulation cover 9, are respectively attached to the terminal parts 15a to 15c. A portion 22a of each heat exchange member 22 which protrudes from the insulation cover 9 protrudes from the insulation cover 9 toward an upstream side direction of airflow in the space S.

Description

  The present invention relates to a slip ring device that includes a ring member provided on a rotating shaft and a brush that contacts the ring member, and an outer bus bar is connected to a brush holder that holds the brush.

  A slip ring device is known which is applied to a composite motor having two rotors that are concentrically arranged and relatively rotatable, and is provided in a space formed in an inner peripheral portion of an inner rotor of the composite motor (Patent Document). 1). In addition, Patent Documents 2 to 5 exist as prior art documents related to the present invention.

JP 2010-1206025 A JP 2010-283997 A JP 2012-029392 A JP 2000-245109 A JP 2006-005990 A

  Since the slip ring device of patent document 1 is arrange | positioned in the space formed in the inner peripheral part of an inner rotor, heat dissipation performance falls. For this reason, the temperature of the ring member or the brush may increase. Further, in the slip ring device of Patent Document 1, since three layers of brushes in contact with the ring member are stacked in the axial direction, the heat of the intermediate brush among the three layers is likely to be trapped. Generally, a brush has a characteristic that wear increases as the temperature increases. Therefore, in the slip ring device of Patent Document 1, the wear of the intermediate brush proceeds, and there is a possibility that the variation in the wear of the brush in each layer becomes large.

  Then, an object of this invention is to provide the slip ring apparatus which can accelerate | stimulate cooling of a brush.

  The slip ring device of the present invention includes a ring member provided on a rotating shaft, a brush that comes into contact with the ring member, a brush holder that holds the brush, and a terminal portion to which an electric wire is connected. An outer bus bar to be connected, and the unit is housed in a case member having an air introduction hole, and is insulated between the unit and the case member so as to cover at least the terminal portion. In the slip ring device provided with a member, a space through which air introduced from the air introduction hole flows is provided between the insulating member and the case member, and the terminal portion protrudes from the insulating member. A heat exchange member disposed in the space is attached, and a portion of the heat exchange member protruding from the insulating member is the insulating member. It protrudes toward the upstream side of the air flow in al the space (Claim 1).

  In the slip ring device of the present invention, a heat exchange member is attached to the terminal portion of the outer bus bar, and the heat exchange member protrudes from the insulating member. Therefore, since the heat exchange member can be directly cooled with the air in the space, heat dissipation from the outer bus bar can be promoted. Further, since the protruding portion protrudes toward the upstream side of the air flow in the space, low-temperature air can be positively applied to this portion. Therefore, the heat transfer coefficient between the protruding portion and air can be improved. Since the temperature of an outer bus bar can be reduced by these, cooling of a brush can be accelerated | stimulated. As a result, the temperature of the brush can be lowered, so that wear of the brush can be suppressed.

  In one form of the slip ring device of the present invention, the case member includes a first flow in which the air introduced from the air introduction hole flows clockwise in the space, and a first flow in which the air flows counterclockwise in the space. A partition plate is provided so as to be divided into two flows, and a portion of the heat exchange member that protrudes from the insulating member may be provided at a position where the first flow and the second flow merge. (Claim 2). At the position where the first flow and the second flow are merged, these flows collide with each other, and flow disturbance occurs. As is well known, heat exchange is promoted as the turbulence of the air flow increases. In this form, since the part which protrudes from the insulating member of the heat exchange member has been arrange | positioned in the position where disturbance of an air flow generate | occur | produces, the thermal radiation from a heat exchange member can be accelerated | stimulated. Therefore, cooling of the brush can be further promoted.

  In one form of the slip ring device of the present invention, the unit has three units, and the rotating shaft is provided with the ring members of the three units arranged side by side, and is arranged at the center of the three ring members. The outer bus bar of the unit including the ring member may be disposed closest to the air introduction hole (claim 3). The unit in which the ring member is arranged at the center has a characteristic that it is likely to become high temperature because heat is less likely to escape from the ring member as compared with other units. In this embodiment, since the outer bus bar of the unit is disposed closest to the air introduction hole, the temperature difference between the units can be reduced. Thereby, since the temperature difference of the brush of each unit can be made small, the dispersion | variation in the abrasion amount between the brushes of each unit can be suppressed.

  As described above, according to the slip ring device of the present invention, the heat exchange member attached to the terminal portion of the outer bus bar can be directly cooled with the air in the space. Moreover, low-temperature air can be positively applied to the portion of the heat exchange member that protrudes from the insulating member. Since the temperature of an outer bus bar can be reduced by these, cooling of a brush can be accelerated | stimulated.

The figure which shows schematically the compound motor in which the slip ring apparatus which concerns on the 1st form of this invention was integrated. The perspective view of a part of compound motor. Sectional drawing of the periphery of a slip ring device. The figure which shows schematically the cross section of the compound motor in the IV-IV line of FIG. The figure which shows the terminal part in the VV line | wire of FIG. 4, and the cross section of the circumference | surroundings. The figure which shows schematically a part of cross section of the compound motor with which the slip ring apparatus which concerns on the 2nd form of this invention was integrated. The figure which shows schematically a part of cross section of the compound motor with which the slip ring apparatus which concerns on the 3rd form of this invention was integrated. The figure which shows schematically a part of cross section of the compound motor with which the slip ring apparatus which concerns on the 4th form of this invention was integrated. The figure which shows schematically a part of cross section of the compound motor with which the slip ring apparatus which concerns on the 5th form of this invention was integrated. The figure which shows the terminal part in the modification of the slip ring apparatus of this invention, and the cross section of the circumference | surroundings.

(First form)
A slip ring device according to a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 schematically shows a composite motor as a rotating electrical machine in which the slip ring device according to the first embodiment is incorporated. The composite motor 1 is used by being incorporated in a drive device for a vehicle such as an automobile. The composite motor 1 is a three-phase AC motor.

  The composite motor 1 includes a winding rotor 2 and a magnet rotor 3 that are rotatable relative to each other and arranged coaxially. A stator 4 fixed to the case 8 so as not to rotate is disposed on the outer periphery of the rotors 2 and 3. The stator 4 is arranged so as to be coaxial with the rotors 2 and 3. The composite motor 1 is provided with an input shaft 5 as a rotation shaft. The winding rotor 2 is disposed with a space around the outer periphery of the input shaft 5, and is connected to the input shaft 5 by a connecting member 6. The magnet rotor 3 is disposed on the outer periphery of the winding rotor 2. The composite motor 1 is provided with an output shaft 7. The magnet rotor 3 is connected to the output shaft 7. The winding rotor 2, the magnet rotor 3, the stator 4, the input shaft 5, and the output shaft 7 are accommodated in a case 8. Case 8 is provided with partition member 8a which divides the inside into two.

  The composite motor 1 is provided between an internal combustion engine (not shown) provided in the drive device and an automatic transmission. In FIG. 1, the engine is disposed on the right side of the composite motor 1, and the automatic transmission is disposed on the left side of the composite motor 1. The input shaft 5 is connected to a crankshaft CS of the internal combustion engine via a damper D. The output shaft 7 is connected to an input shaft (not shown) of the automatic transmission. The composite motor 1 has a function of amplifying the engine torque input to the winding rotor 2 and transmitting the amplified torque to the automatic transmission.

  The composite motor 1 is provided with a slip ring device 10A. This slip ring device 10A is a three-phase alternating current slip ring device, and is used to energize the winding rotor 2 and an inverter (not shown). The slip ring device 10 </ b> A is mounted on the outer periphery of the input shaft 5. Further, the slip ring device 10 </ b> A is disposed between the input shaft 5 and the winding rotor 2.

  As shown in FIGS. 1 to 3, the slip ring device 10 </ b> A includes three units U <b> 1 to U <b> 3 corresponding to the three phases of the winding rotor 2. The units U1 to U3 are stacked in three layers with respect to the direction of the rotation axis Ax of the input shaft 5 (axial direction). The first layer unit U1 disposed on the left side in FIG. 3 includes a ring member 11a mounted on the outer periphery of the input shaft 5, a brush 12a that contacts the ring member 11a, a brush holder 13a that holds the brush 12a, and a brush holder 13a. The outer bus bar 14a is connected to the outer bus bar 14a. Although a part of the brush 12a does not appear in the drawing, a total of six brushes 12a are provided for each brush holder 13a every 60 ° with the axis Ax as the center. However, the number of brushes 12a is arbitrary. Similarly, the second layer unit U2 disposed in the center includes a ring member 11b, a brush 12b, a brush holder 13b, and an outer bus bar 14b. The third layer unit U3 disposed on the right side includes the ring member 11c and the brush 12c. , Brush holder 13c, and outer bus bar 14c.

  As shown in FIG. 3, the ring members 11 a to 11 c are provided coaxially on the outer peripheral surface of the input shaft 5. The ring members 11a to 11c are provided so as to be aligned in the direction of the axis Ax (axial direction). The brushes 12a to 12c held by the brush holders 13a to 13c are pressed against the ring members 11a to 11c with a predetermined pressing force by the illustrated spring interposed therebetween.

  As shown in FIG. 2, the outer bus bars 14 a to 14 c are drawn out to the outer side in the rotational radius direction of the input shaft 5 and extend in the axial direction. Terminal portions 15 a to 15 c are provided at the ends of the outer bus bars 14 a to 14 c by bending outward in the rotational radial direction.

  A cylindrical tube member 8b extending in the axial direction from the partition member 8a is inserted into the inner circumferential space of the winding rotor 2. The cylindrical member 8b is inserted between the winding rotor 2 and the slip ring device 10A. A partition wall 8c is provided at one end of the cylindrical member 8b. As shown in FIG. 1, the slip ring device 10A is accommodated in a space formed by a partition member 8a, a cylindrical member 8b, and a partition wall 8c. Therefore, the case 8, the partition member 8a, the cylindrical member 8b, and the partition wall 8c correspond to the case member of the present invention.

  As shown in FIG. 3, each unit U1-U3 is covered with the insulating cover 9 made of an insulating material. For example, an insulating resin is used as the insulating material. As shown in this figure, a space S is provided between the insulating cover 9 and the cylindrical member 8b over the entire circumference. Therefore, the insulating cover 9 corresponds to the insulating member of the present invention.

  FIG. 4 schematically shows a cross section of the composite motor 1 taken along line IV-IV in FIG. As shown in this figure, the cylindrical member 8b is provided with an air introduction hole 8d for introducing air into the space S. The supply of air into the space S is realized by a structure such as a fan that rotates integrally with the input shaft 5 forcibly sending outside air into the space S through the air introduction hole 8d. As shown in this figure, the air that has flowed into the space S is a flow of air that flows clockwise around the insulating cover 9 (hereinafter sometimes referred to as a first flow) F1 and a flow of air that flows counterclockwise. The flow (hereinafter sometimes referred to as a second flow) F2. In addition, the direction of the arrow in FIG. 4 shows the direction through which air flows, and the thickness of the arrow shows the flow velocity. The arrow indicates that the thicker the flow rate, the higher the flow rate. Further, the air that has flowed into the space S as indicated by the arrow F3 in FIG. 3 also travels in the direction of the axis Ax. And it flows in insulative cover 9 and cools brushes 12a-12c of each unit U1-U3.

  In this composite motor 1, when the input shaft 5 rotates during operation, heat is generated by friction between the ring members 11a to 11c and the brushes 12a to 12c. At this time, as shown in FIG. 3, since the surrounding environment of each of the units U1 to U3 is not uniform, a temperature difference occurs between the units U1 to U3. The second layer unit U2 is sandwiched between the first layer unit U1 and the third layer unit U3 and heat is likely to be trapped. In particular, since air flows in the direction from the first layer unit U1 toward the third layer unit U3 as indicated by an arrow F3 in FIG. 3, the warm air after heat exchange with the first layer unit U1 is performed in the first direction. Guided to the two-layer unit U2. Further, as shown in this figure, since the third layer unit U3 has neighboring heat-exchangeable peripheral members, heat exchange is actively performed with the peripheral members. For this reason, the second layer unit U2 has the characteristic that it tends to be the highest temperature compared to the first layer unit U1 and the third layer unit U3. And since the 1st layer unit U1 is cooled by the air lower temperature than the air which cools 3rd layer unit U3, 3rd layer unit U3 has the characteristic that it becomes easy to become high temperature compared with 1st layer unit U1. .

  As shown in FIG. 4, the terminal portion 15b of the second layer unit U2 is disposed at a position closer to the air introduction hole 8d than the terminal portions 15a and 15c of the other units U1 and U3. Further, the terminal portion 15c of the third layer unit U3 is disposed at a position closer to the air introduction hole 8d than the terminal portion 15a of the first layer unit U1.

  As shown in this figure, a terminal block 16 connected to an inverter (not shown) is arranged on the cylindrical member 8b. The terminal block 16 is connected to the terminal portions 15a to 15c of the outer bus bars 14a to 14c via the electric wires 17a to 17c. FIG. 5 shows a cross section of the terminal portion 15b and its surroundings along the line V-V in FIG. As shown in this figure, the electric wire 17 b includes a copper wire 18 and an insulator 19 that covers the copper wire 18. The insulator 19 is removed from the end portion of the electric wire 17b, and the electric wire 17b is fixed to the terminal portion 15b with a bolt 20 and a nut 21. Further, as shown in this figure, a metal heat exchange member 22 is attached to the terminal portion 15b with bolts 20 and nuts 21. The heat exchange member 22 has a plate shape. Further, the heat exchange member 22 is attached to the terminal portion 15b so that a part (hereinafter, sometimes referred to as a protruding portion) 22a protrudes outside the insulating cover 9. As shown in FIG. 4, the protrusion 22 a is arranged in the space S. Further, as shown in this figure, the protruding portion 22a protrudes from the insulating cover 9 toward the upstream side of the first flow F1.

  As shown in this figure, the terminal portions 15a of the first layer unit U1 and the terminal portions 15c of the third layer unit U3 also have the electric wires 17a, 17c and the heat exchange member 22 as bolts 20 and the same as the second layer unit U2. It is attached with a nut 21. As for the heat exchange member 22 attached to the terminal part 15c of the 3rd layer unit U3, the protrusion part 22a protrudes from the insulating cover 9 toward the upstream of the 2nd flow F2. The protrusion 22a of the heat exchange member 22 attached to the terminal portion 15a of the first layer unit U1 protrudes from the insulating cover 9 toward the upstream side of the first flow F1.

  As described above, in the slip ring device 10A of the first embodiment, the heat exchange member 22 is attached to the terminal portions 15a to 15c of the units U1 to U3. In the heat exchange member 22, the protruding portion 22 a protrudes outside the insulating cover 9. Therefore, the heat exchange member 22 can be directly cooled with the air in the space S. Thereby, the heat radiation from the outer bus bars 14a to 14c can be promoted. Further, the protruding portion 22 a protrudes from the insulating cover 9 toward the upstream side of the air flow in the space S. Thereby, since the low temperature air can be positively applied to the protrusion 22a, the heat transfer coefficient between the protrusion 22a and the air can be improved. And since the temperature of outer bus-bar 14a-14c can be reduced by these, cooling of brush 12a-12c can be accelerated | stimulated. Therefore, the temperature of the brushes 12a to 12c can be lowered. As is well known, the wear amount of the brushes 12a to 12c increases as the temperature of the brushes 12a to 12c increases. Therefore, wear of the brushes 12a to 12c can be suppressed.

  Further, in this embodiment, the terminal portion 15b of the second layer unit U2 that is likely to become the highest temperature is disposed at a position closer to the air introduction hole 8d than the terminal portions 15a and 15c of the other units U1 and U3. And the terminal part 15c of the 3rd layer unit U3 which becomes high temperature easily compared with the 1st layer unit U1 has been arrange | positioned in the position near 8d of air introduction holes rather than the terminal part 15a of the 1st layer unit U1. Therefore, the cooling performance increases in the order of the first layer unit U1, the third layer unit U3, and the second layer unit U2. Thereby, the temperature difference between brush 12a-12c can be made small. Therefore, variation in the amount of wear between the brushes 12a to 12c can be suppressed.

(Second form)
Next, a slip ring device 10B according to a second embodiment of the present invention will be described with reference to FIG. In addition, in this form, the same code | symbol is attached | subjected to a common part with a 1st form, and description is abbreviate | omitted. Also in this embodiment, FIGS. 1 to 3 are referred to for the composite motor 1. FIG. 6 is a diagram corresponding to FIG. 4 of the first embodiment. In addition, in this figure, illustration of the terminal block 16 and the electric wires 17a-17c is abbreviate | omitted. Also in this form, the terminal portion 15b of the second layer unit U2 is disposed at a position closer to the air introduction hole 8d than the terminal portions 15a and 15c of the other units U1 and U3. Further, the terminal portion 15c of the third layer unit U3 is disposed at a position closer to the air introduction hole 8d than the terminal portion 15a of the first layer unit U1.

  As shown in this figure, in this embodiment, a partition plate 30 is provided in the space S. The partition plate 30 is provided on the partition member 8a or the cylinder member 8b. The partition plate 30 is disposed at the outlet of the air introduction hole 8d so that the air flowing into the space S from the air introduction hole 8d is divided into the first flow F1 and the second flow F2. Moreover, the partition plate 30 is arrange | positioned so that the flow volume of the 1st flow F1 may become larger than the flow volume of the 2nd flow F2.

  According to this aspect, since the flow rate of the first flow F1 is larger than the flow rate of the second flow rate F2, the cooling performance of the second layer unit U2 can be increased. Moreover, since the terminal part 15c of the 3rd layer unit U3 is arrange | positioned in the position near the air introduction hole 8d rather than the terminal part 15a of the 1st layer unit U1 also in this form like the 1st form, it is 1st layer The cooling performance of the third layer unit U3 is higher than that of the unit U1. Therefore, the temperature difference between the brushes 12a to 12c can be reduced. Therefore, variation in the amount of wear between the brushes 12a to 12c can be suppressed.

(Third form)
A slip ring device 10C according to a third embodiment of the present invention will be described with reference to FIG. In addition, in this form, the same code | symbol is attached | subjected to the part which is common in the 1st form or the 2nd form, and description is abbreviate | omitted. Also in this embodiment, FIGS. 1 to 3 are referred to for the composite motor 1. FIG. 7 is a diagram corresponding to FIG. 4 of the first embodiment. In addition, in this figure, illustration of the terminal block 16 and the electric wires 17a-17c is abbreviate | omitted. Also in this form, the terminal portion 15b of the second layer unit U2 is disposed at a position closer to the air introduction hole 8d than the terminal portions 15a and 15c of the other units U1 and U3. Further, the terminal portion 15c of the third layer unit U3 is disposed at a position closer to the air introduction hole 8d than the terminal portion 15a of the first layer unit U1.

  As shown in this figure, the first flow F1 and the second flow F2 merge at the confluence position P on the opposite side across the air introduction hole 8d and the axis Ax. For this reason, at the merging position P, the two flows F1 and F2 collide with each other, resulting in a flow disturbance. And in this form, the protrusion part 22a of the heat exchange member 22 attached to the terminal part 15a of the 1st layer unit U1 is arrange | positioned in this merge position P. FIG. Moreover, as shown in this figure, the protrusion 22a of the heat exchange member 22 protrudes from the insulating cover 9 toward the upstream side of the second flow F2.

  In this embodiment, the protruding portion 22a of the heat exchange member 22 attached to the terminal portion 15a of the first layer unit U1 is disposed at the joining position P. As is well known, heat exchange is promoted as the turbulence of the air flow increases. Therefore, heat radiation from the heat exchange member 22 can be promoted. And according to this form, while being able to make the cooling performance of the 2nd layer unit U2 and the 3rd layer unit U3 arrange | positioned near the air introduction hole 8d rather than the 1st layer unit U1 high, it is far from the air introduction hole 8d. The cooling performance of the arranged first layer unit U1 can also be improved. Therefore, the temperature of the brushes 12a to 12c can be further reduced. Therefore, the wear of the brushes 12a to 12c can be further suppressed.

(4th form)
A slip ring device 10D according to a fourth embodiment of the present invention will be described with reference to FIG. In addition, in this form, the same code | symbol is attached | subjected to the part common to the 1st-3rd form mentioned above, and description is abbreviate | omitted. Also in this embodiment, FIGS. 1 to 3 are referred to for the composite motor 1. FIG. 8 is a diagram corresponding to FIG. 4 of the first embodiment. In addition, in this figure, illustration of the terminal block 16 and the electric wires 17a-17c is abbreviate | omitted.

  As shown in this figure, in this embodiment, the partition plate 40 is provided so that the air flowing in from the air introduction hole 8d flows in the space S in the same direction. As for this partition plate 40, this partition plate 30 is provided in the partition member 8a or the cylinder member 8b. Further, in this embodiment, the terminal portions 15a to 15c of the units U1 to U3 are connected to the terminal portion 15b of the second layer unit U2, the terminal portion 15c of the third layer unit U3, and the first layer from the upstream side in the air flow direction. They are arranged in the order of the terminal portions 15a of the unit U1. And the heat exchange member 22 attached to each terminal part 15a-15c is provided so that the protrusion part 22a may protrude toward the upstream direction of the flow of air.

  In this embodiment, the air hits in the order of the terminal portion 15b of the second layer unit U2, the terminal portion 15c of the third layer unit U3, and the terminal portion 15a of the first layer unit U1, that is, the terminal portion of the unit that tends to be hot. . Therefore, it is possible to increase the cooling performance of the outer bus bar that tends to become high temperature. Therefore, the temperature difference between the brushes 12a to 12c can be reduced. And thereby, the dispersion | variation in the abrasion amount between brush 12a-12c can be suppressed.

(5th form)
A slip ring device 10E according to a fifth embodiment of the present invention will be described with reference to FIG. In addition, in this form, the same code | symbol is attached | subjected to the same part as the 1st-4th form mentioned above, and description is abbreviate | omitted. Also in this embodiment, FIGS. 1 to 3 are referred to for the composite motor 1. FIG. 9 is a diagram corresponding to FIG. 4 of the first embodiment. In addition, in this figure, illustration of the terminal block 16 and the electric wires 17a-17c is abbreviate | omitted.

  As shown in this figure, in this embodiment, the air introduction hole 8d is provided to be inclined in the tangential direction so that the air flowing into the space S from the air introduction hole 8d can easily flow in the same direction. Also in this embodiment, as in the fourth embodiment, the terminal portions 15a to 15c of the units U1 to U3 are connected to the terminal portions 15b of the second layer unit U2 and the third layer unit U3 from the upstream side in the air flow direction. The terminal portion 15c and the terminal portion 15a of the first layer unit U1 are arranged in this order. And the heat exchange member 22 attached to each terminal part 15a-15c is provided so that the protrusion part 22a may protrude toward the upstream direction of the flow of air.

  In the fifth embodiment, as in the fourth embodiment, the air hits the terminal portion 15b of the second layer unit U2, the terminal portion 15c of the third layer unit U3, and the terminal portion 15a of the first layer unit U1 in this order. Therefore, it is possible to increase the cooling performance of the outer bus bar that tends to become high temperature. Thereby, since the temperature difference between brushes 12a-12c can be made small, the dispersion | variation in the abrasion amount between brushes 12a-12c can be suppressed.

  In each form mentioned above, although the heat exchange member 22 was provided separately from the electric wires 17a-17c, you may make the electric wires 17a-17c function as a heat exchange member of this invention. For example, as shown in FIG. 10, a part of the insulator 19 located outside the insulating cover 9 in the electric wire 17a is partially removed, and a part of the copper wire 18 is exposed. In this case, the exposed portion 18a of the copper wire 18 and air can be subjected to heat exchange. And this exposed part 18a is arrange | positioned toward the upstream direction of the flow of the air in the space S. As shown in FIG. Thereby, the heat transfer rate between the copper wire 18 and air can be improved. Therefore, the temperature of the brushes 12a to 12c can be lowered. Moreover, this can suppress wear of the brushes 12a to 12c. In this case, the copper wire 18 corresponds to the heat exchange member of the present invention.

  This invention is not limited to each form mentioned above, It can implement with a various form. For example, the slip ring device to which the present invention is applied is not limited to one having three ring members. The present invention can be applied to a slip ring device in which one or more ring members are provided. Further, the number of brushes in the slip ring device of the present invention is not limited to six for one ring member. The number of brushes provided for one ring member may be 1 to 5. Moreover, you may provide seven or more brushes with respect to one ring member. The heat exchange member may be composed of various materials that conduct heat.

  The apparatus in which the slip ring apparatus of the present invention is incorporated is not limited to a three-phase AC rotating electric machine. The slip ring device of the present invention may be incorporated into various devices having a rotating shaft.

5 Input shaft (rotary shaft)
8 Case (Case material)
8a Partition member (case member)
8b Tube member (case member)
8c Bulkhead (case member)
8d Air introduction hole 9 Insulating cover (insulating member)
10A, 10B, 10C, 10D, 10E Slip ring device 11a to 11c Ring member 12a to 12c Brush 13a to 13c Brush holder 14a to 14c Outer bus bar 15a to 15c Terminal portion 17a to 17c Electric wire 22 Heat exchange member 30 Partition plate F1 1st Flow F2 second flow S space U1-U3 unit

Claims (3)

A ring member provided on a rotating shaft; a brush that contacts the ring member; a brush holder that holds the brush; and an outer bus bar that has a terminal portion to which an electric wire is connected and is connected to the brush holder. Having a unit containing,
The unit is accommodated in a case member having an air introduction hole,
In a slip ring device in which an insulating member is provided between the unit and the case member so as to cover at least the terminal portion,
Between the insulating member and the case member, a space through which air introduced from the air introduction hole flows is provided,
A heat exchange member that protrudes from the insulating member and is arranged in the space is attached to the terminal portion,
The part which protrudes from the said insulating member of the said heat exchange member is a slip ring apparatus which protrudes toward the direction of the upstream of the flow of the air in the said space from the said insulating member. A partition plate is provided in the case member so that the air introduced from the air introduction hole is divided into a first flow that flows clockwise in the space and a second flow that flows counterclockwise in the space. Provided,
2. The slip ring device according to claim 1, wherein a portion of the heat exchange member that protrudes from the insulating member is provided at a position where the first flow and the second flow merge. Having three units,
The rotating shaft is provided with the ring members of the three units side by side,
The slip ring device according to claim 1 or 2, wherein an outer bus bar of a unit including a ring member arranged in the center among the three ring members is arranged closest to the air introduction hole.

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