JP5178292B2 - Current collection and distribution structure of rotating electrical machines - Google Patents

Description

  The present invention relates to a power collection and distribution structure for a rotating electrical machine.

Conventionally, for example, a centralized power distribution member for a motor that holds three polygonal annular bus bars that connect windings for each of three phases with three types of clips made of synthetic resin in a coaxial arrangement. (For example, refer to Patent Document 1).
In this concentrated power distribution member, the first clip is attached to the linear portion of the polygonal annular bus bar from the radially outer side to the radially inner side, and the second and third clips are attached to the connection end of the bus bar. The closed space formed by the second and third clips is filled with a filler.
JP 2007-14083 A

By the way, in the concentrated power distribution member of the motor according to the above prior art, a plurality of (three types) different clips are used to hold the three-phase bus bar, so that the number of parts and cost required for the configuration increase. As a result, there is a problem that the process of forming the centralized power distribution member takes a complicated time.
In addition, the polygonal annular bus bar includes a plurality of straight portions connected to be bent at a predetermined angle, a plurality of tabs bent in a crank shape so as to protrude radially inward from the straight portion, and a predetermined The first clip mounted from the radially outer side to the radially inward side with respect to the linear portion of the bus bar is provided with a connecting end portion that protrudes radially outward from the straight portion. There arises a problem that it is difficult to position and fix at a desired circumferential position.
In addition, in order to hold the bus bar with the first clip provided with the concave groove having an arc-shaped cross section in the circumferential tangential direction, it is necessary to provide the bus bar with a straight portion, for example, a circle without the straight portion. In the arc-shaped portion of the annular bus bar, there is a problem that the bus bar cannot be properly accommodated in the concave groove, and the first clip cannot be properly mounted.
The present invention has been made in view of the above circumstances, and it is possible to reduce the number of parts and the cost required for the configuration, prevent the trouble of the configuration process, and easily improve the placement accuracy. An object of the present invention is to provide a power collection and distribution structure for a rotating electrical machine.

  In order to solve the above-described problems and achieve the object, the current collection and distribution structure of the rotating electrical machine according to the first aspect of the present invention is the same-phase coil for each phase of the multiple-phase rotating electrical machine (for example, the embodiment). A plurality of bus rings (for example, the bus rings 41U, 41V, 41W in the embodiment) for connecting the stator coils 34) and a predetermined circumferential direction position of the bus rings of the plurality of phases radially inwardly. A plurality of clamping members (for example, clamping members 46,..., 46 in the embodiment) that are mounted to face radially outward from the plurality of phases and clamp the bus rings of the plurality of phases. The clamping members are configured in the same shape.

Furthermore, prior SL bus ring, lead wire portions of the coil in a predetermined circumferential position in facing radially inward projecting to the same phase (e.g., lead wire portion 34a in the embodiment) connection coupled with (For example, the terminal connection portions 44,..., 44 in the embodiment) are provided, and the clamping member is disposed between the connection portions adjacent in the circumferential direction of the bus ring of the plurality of phases.

Furthermore, the prior SL connecting portion, the fixing portion for positioning and fixing the clamping member mounted between the connecting portions adjacent in the circumferential direction of the bus ring of the plurality of phases (for example, the bent portion 44b in the embodiment) Is provided.

Furthermore, the current collection and distribution structure of the rotating electrical machine according to the second aspect of the present invention includes a plurality of phases connected to the same phase coil (for example, the stator coil 34 in the embodiment) for each phase of the plurality of phases of the rotating electrical machine. A bus ring (for example, the bus rings 41U, 41V, 41W in the embodiment) and a predetermined circumferential direction position of the bus ring of the plurality of phases are mounted from the radially inner side toward the radially outer side, and A plurality of sandwiching members (for example, sandwiching members 46,..., 46 in the embodiment) for sandwiching and fixing the bus rings of a plurality of phases, the plurality of sandwiching members having the same shape, and the sandwiching member Is a groove portion (for example, a groove portion 46a in the embodiment) that extends in a substantially circumferential direction on the radially outer surface on the basis of the radial direction and the circumferential direction of the bus ring and is mounted with the bus ring. ) The substantially circumferential cross section of the concave groove portion has a substantially elliptical shape in which the major axis extends in the radial direction, and the bus ring has a curved portion (for example, an arc-shaped portion in the embodiment) curved outward in the radial direction. The curved portion of the bus ring is attached to the concave groove portion.

Furthermore, the current collection and distribution structure of the rotating electrical machine according to the third aspect of the present invention includes a plurality of phases connected to the same phase coil (for example, the stator coil 34 in the embodiment) for each phase of the plurality of phases rotating electrical machines. A bus ring (for example, the bus rings 41U, 41V, 41W in the embodiment) and a predetermined circumferential direction position of the bus ring of the plurality of phases are mounted from the radially inner side toward the radially outer side, and A plurality of sandwiching members (for example, sandwiching members 46,..., 46 in the embodiment) for sandwiching and fixing the bus rings of a plurality of phases, the plurality of sandwiching members having the same shape, and the bus ring An outer peripheral wall portion (for example, the outer peripheral wall portion 52 in the embodiment) that covers the radially outer side of the coil, and the outer peripheral wall portion has a hole ( For example, the hole 52a) in the embodiment is provided The clamping member to close the hole portion of the outer peripheral wall portion.

Furthermore, in the power collection and distribution structure for a rotating electrical machine according to the fourth aspect of the present invention, the clamping member protrudes radially outward from the radially outer surface on the basis of the radial direction of the bus ring. And a protrusion (for example, a protrusion 46d in the embodiment) that can be attached to the hole of the outer peripheral wall, and the protrusion is attached to the hole of the outer peripheral wall so as to remove the hole. Block.

Furthermore, in the power collection and distribution structure for a rotating electrical machine according to the fifth aspect of the present invention, the clamping member extends in a circumferential direction on the outer peripheral surface and is a concave groove (for example, in the embodiment) to which the bus ring is mounted. A concave groove 46a).
Furthermore, in the power collection and distribution structure for a rotating electrical machine according to the sixth aspect of the present invention, the bus ring protrudes radially inward at a predetermined circumferential position so that the lead wire portion of the coil in the same phase (for example, implementation) In the form of the lead wire part 34a) (for example, the terminal connection parts 44,..., 44 in the embodiment), and the clamping member in the circumferential direction of the bus ring of the plurality of phases It arrange | positions between the said adjacent connection parts.
Furthermore, in the power distribution structure for a rotating electrical machine according to the seventh aspect of the present invention, the lead wire portion of the coil is the bus ring or a terminal portion connected to the bus ring (for example, the connection terminal 45 in the embodiment). ,..., 45), and the clamping member is disposed on the radially outer side of the lead wire portion with reference to the radial direction of the bus ring.
Furthermore, in the power collection and distribution structure for a rotating electrical machine according to the eighth aspect of the present invention, the connection portion positions and fixes the clamping member mounted between the connection portions adjacent in the circumferential direction of the bus ring of the plurality of phases. A fixing portion (for example, a bent portion 44b in the embodiment) is provided.

  According to the power distribution structure of the rotating electrical machine according to the first aspect, the plurality of clamping members that fix the bus ring are mounted from the radially inner side to the radially outer side at predetermined circumferential positions of the bus ring. By configuring as the same shape, it is possible to reduce the number of parts and the cost required for the configuration of the current collection and distribution structure, to prevent the trouble of the process of configuring the current collection and distribution structure, and to improve productivity. Can do.

Furthermore , the holding member attached to the bus ring can be positioned by the connecting portion of the bus ring, and the mounting position accuracy of the plurality of holding members can be easily improved.

Furthermore, a clamping member which is mounted between the connection portions adjacent in the circumferential direction of the bus ring of several phases, can be positioned by these connections themselves, easily improve the mounting position accuracy of the plurality of clamping members be able to.

According to the power distribution structure of the rotating electrical machine according to the second aspect, the plurality of clamping members that fix the bus ring are mounted from the radially inner side to the radially outer side at predetermined circumferential positions of the bus ring. By configuring as the same shape, it is possible to reduce the number of parts and the cost required for the configuration of the current collection and distribution structure, to prevent the trouble of the process of configuring the current collection and distribution structure, and to improve productivity. Can do.
Furthermore, the bus of cross section of the groove portion of the clamping member server sling is attached by a substantially elliptical shape, for example, the curved portion of the bus ring, such as annular can be properly held, for example, polygonal annular Not only the ring but also the bus ring can be fixed by the clamping member even when there is no linear portion in the bus ring.
In addition, in a state where the curved portion of the bus ring is attached to the concave groove portion having a substantially elliptical cross section in the circumferential direction, the inner peripheral surface of the curved portion and the substantially circumferential end portion of the bottom portion of the concave groove portion are relatively relative to each other. In contrast to the contact with a small area, the outer peripheral surface of the curved portion and the substantially central portion in the circumferential direction of the opening of the groove portion are in contact with each other with a relatively large area. It is possible to prevent an excessively large load from acting due to the distribution of the load therebetween.

According to the current collection and distribution structure of the rotating electrical machine according to the third to fifth aspects, the plurality of clamping members that fix the bus ring are moved from the radially inner side to the radially outer side at a predetermined circumferential position of the bus ring. By configuring it as the same shape that is mounted oppositely, the number of parts and cost required for the configuration of the current collection and distribution structure can be reduced, and it is possible to prevent the trouble of the process of configuring the current collection and distribution structure from taking place. Can be improved.
Further , after forming the coil with the wire rod, the wire rod is drawn out radially outward, and the hole portion of the outer peripheral wall portion required for cutting the wire rod to form the lead wire portion is blocked by the clamping member. In addition, a closed space for filling an insulating agent around the bus ring and the lead wire portion of the coil can be formed by the outer peripheral wall portion and the sandwiching member.
Furthermore, according to the power collection and distribution structure of the rotating electrical machine according to the sixth aspect, the holding member attached to the bus ring can be positioned by the connecting portion of the bus ring, and the mounting position accuracy of the plurality of holding members can be easily improved. Can be made.
Furthermore, according to the power collection and distribution structure of the rotating electrical machine according to the seventh aspect, the desired insulation between the bus ring and the lead wire portion of the coil can be ensured by the sandwiching member made of the insulating material, and the bus ring A closed space for filling an insulating agent around the lead wire portion of the coil can be formed by the sandwiching member.
Furthermore, according to the power collection and distribution structure for a rotating electrical machine according to the eighth aspect, it is possible to position the clamping members attached between the adjacent connection portions in the circumferential direction of the multi-phase bus ring by these connection portions themselves. The mounting position accuracy of the plurality of clamping members can be easily improved.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a current collecting and distribution structure for a rotating electrical machine according to the present invention will be described below with reference to the accompanying drawings.
A rotating electrical machine power collection and distribution structure (for example, an annular stator group 12 and a power collection and distribution member 13 to be described later) according to this embodiment includes, for example, a rotating electrical machine stator 1 mounted on a vehicle such as a hybrid vehicle or an electric vehicle as a travel drive source. It is equipped with.

For example, as shown in FIG. 1, the stator 1 is an inner rotor type in which a rotor (not shown) is disposed on the inner peripheral side.
The stator 1 includes, for example, a stator holder 11, an annular stator group 12 composed of a plurality of stator pieces 12 a,..., 12 a arranged in an annular shape, an annular power collecting / distributing member 13, and a midpoint connecting member 14. Yes.

The stator holder 11 includes a cylindrical portion 21 and a flange portion 22 provided so as to protrude radially outward at one axial end portion of the cylindrical portion 21.
In the stator holder 11, for example, a cylindrical portion 21 is accommodated in a housing (not shown), and a bolt (not shown) inserted through a bolt mounting hole (not shown) provided in the flange portion 22 is screwed into the housing. Fixed by.
An annular stator group 12 is accommodated in the cylindrical portion 21 of the stator holder 11 by press fitting or the like.

The annular stator group 12 is configured by arranging a predetermined number of stator pieces 12a, ..., 12a in an annular shape.
Each stator piece 12 a includes, for example, a split iron core 31 formed by laminating a plurality of substantially T-shaped silicon steel plates, an insulating bobbin 32 made of an insulating resin material attached to the split iron core 31, and an insulating bobbin 32. A wound stator coil 34 is provided.

The split iron core 31 includes a tooth (not shown) and a yoke (not shown) whose axial thicknesses are equal to each other, and the circumferential width of the yoke integrally provided at the radial base end portion of the tooth is: It is formed so as to be larger than the circumferential width of the teeth.
Further, both end surfaces in the circumferential direction of the yoke are shaped so as to be in surface contact with each other, and in a state where the plurality of stator pieces 12a,... An annular stator group 12 is formed.

The insulating bobbin 32 can be divided, for example, in the axial direction (that is, the stacking direction of the divided iron cores 31), and the divided iron cores 31 are sandwiched from both sides in the axial direction by two divided insulating bobbin members. Installed.
The insulating bobbin 32 includes, for example, a bobbin portion that is fitted on the teeth of the divided core 31, and a current collection and distribution member that extends from the bobbin portion to the yoke side (that is, radially outward) of the divided core 31 and covers the other axial end surface of the yoke. A housing portion 32b and a midpoint connecting member housing portion 32c extending from the bobbin portion in a direction away from the yoke (that is, radially inward) on the other side in the stacking direction equivalent to the power collecting / distributing member housing portion 32b. Yes.
A stator coil 34 is wound around the bobbin portion of the insulating bobbin 32.
Further, the power collecting / distributing member 13 is accommodated in the power collecting / distributing member accommodating portion 32b, and the midpoint connecting member 14 is accommodated in the midpoint connecting member accommodating portion 32c.

The current collecting and distributing member 13 includes, for example, a plurality of annular bus rings 41U having a plurality of phases for connecting a plurality of stator coils 34,..., 34 for each of a plurality of phases (for example, three phases of U phase, V phase, and W phase). The bus rings 41U, 41V, 41W for each of a plurality of phases have substantially the same shape, and have an annular lead frame 42 and a power supply terminal 43 provided on the lead frame 42. A plurality of terminal connecting portions 44,..., 44 projecting inward in the radial direction from predetermined circumferential positions of the lead frame 42 (that is, positions at predetermined intervals in the circumferential direction) and curved in a U shape, A plurality of U-shaped connection terminals 45,..., 45 for connecting the stator coil 34 and each of the plurality of terminal connection portions 44 of the lead frame 42, and predetermined circumferential directions of the plurality of annular bus rings 41U, 41V, 41W. Within radial position Directed from the side in the radially outward side mounted with a plurality of phases of bus rings 41U, 41V, a plurality of the same shape pinching members 46 which fixedly hold the 41W, ..., it is constituted by a 46.
In addition, the lead frame 42, the terminal connection part 44, and the clamping member 46 of each phase are made into the same shape with respect to the bus rings 41U, 41V, and 41W for each phase. Each bus ring 41U, 41V, 41W is directed from the other in the axial direction to one side, and in order to compensate for the difference in the axial position in the state of being coaxially stacked, the axial length is different for each phase. It is set to a different value.

For example, as shown in FIG. 2, the annular lead frame 42 is formed with a conducting wire having an insulating coating (not shown) in an annular shape, and one end portion and the other end portion of the conducting wire project radially outward, and the axial direction It is configured to be connected to the power supply terminal 43 while being bent toward one side.
For example, as shown in FIGS. 3 and 4, the terminal connection portion 44 that protrudes inward in the radial direction from a predetermined position in the circumferential direction of the lead frame 42 (that is, a position at a predetermined interval in the circumferential direction) and curves in a U shape. In addition, a portion (exposed portion 44a) where the insulating coating (not shown) is peeled off and the lead frame body is exposed is provided, and a plurality of annular bus rings 41U, 41V, 41W fixed by the clamping members 46 are collected and distributed. When mounted in the member accommodating portion 32b, one end 45a of the U-shaped connection terminal 45 is connected to the exposed portion 44a by, for example, fusing (heat caulking).

For example, as shown in FIGS. 5 and 4, the other end 45 b of the connection terminal 45 is connected to a lead wire portion 34 a formed from one end of the stator coil 34 by, for example, fusing (heat caulking).
The U-shaped connection terminal 45 can be fixed at a predetermined position in the current collecting / distributing member accommodating portion 32b. In the step of configuring the current collecting / distributing structure of the rotating electrical machine according to this embodiment, first, the current collecting / distributing member A U-shaped connection terminal 45 is fixed at a predetermined position in the housing portion 32b, and then a lead wire portion 34a that is drawn radially outward from the stator coil 34 is attached to the other end 45b of the connection terminal 45, Next, when the multiple-phase annular bus rings 41U, 41V, 41W fixed by the sandwiching member 46 are mounted in the current collecting / distributing member accommodating portion 32b, the exposed portion 44a of the terminal connecting portion 44 of the lead frame 42 is connected. At one end 45a of the terminal 45, and at one end 45a and the other end 45b of the connection terminal 45, connection work such as fusing (heat caulking) is performed, for example. The arm 42 and the stator coil 34 is adapted to be connected via the connection terminal 45.
Further, the other end 45b of the connection terminal 45 is positioned and fixed in the power collection / distribution member accommodating portion 32b while positioning and fixing the lead wire portion 34a drawn out radially outward from the stator coil 34 wound around the bobbin portion of the insulating bobbin 32. A positioning member 51 is provided at a position shifted in the circumferential direction from the circumferential position of the central axis of the stator coil 34.

As shown in FIGS. 1 to 7A and 7B, for example, the clamping member 46 is formed in a substantially rectangular plate shape by an electrical insulating material, and is attached to a plurality of annular bus rings 41U, 41V, and 41W. In this state, a plurality of groove portions 46a, 46a, 46a extending substantially in the circumferential direction are provided on the surface 46A on the radially outer side, and the lead frames 42 mounted in the groove portions 46a are sandwiched and fixed. Yes.
The groove 46a is formed so that a cross section in a substantially circumferential direction (that is, a tangential direction in the circumferential direction and the longitudinal direction of the holding member 46) has a substantially elliptical shape with a major axis extending in the radial direction. The lead frame 42 mounted therein is held at least in the radially outward portion or the radially inward portion in the recessed groove portion 46a. In other words, the clamping member that is mounted from the radially inner side to the radially outer side at a portion other than the vicinity of the terminal connecting portion 44 of the annular lead frame 42 (that is, an arcuate portion that curves outwardly in the radial direction). 46, at the central portion in the substantially circumferential direction, for example, as shown in FIG. 7A, the outer peripheral surface 42A of the lead frame 42 and the radially outward opening 46b in the groove 46a are relatively large. 7B, for example, as shown in FIG. 7B, the inner peripheral surface 42B of the lead frame 42 and the bottom 46c on the radially inner side in the groove 46a are relatively at both ends in the substantially circumferential direction. In a small area.

Furthermore, the clamping member 46 includes a protruding portion 46d that protrudes radially outward from the surface 46A on the radially outer side in a state of being attached to the multiple-phase annular bus rings 41U, 41V, and 41W. The projecting portion 46d can be mounted in a hole 52a provided in the outer peripheral wall portion 52 of the power collection / distribution member accommodating portion 32b, and the outer periphery in a state where the power collection / distribution member 13 is accommodated in the power collection / distribution member accommodation portion 32b. The hole 52a of the wall 52 is closed.
The outer peripheral wall portion 52 of the insulating bobbin 32 is provided so as to cover the power collection / distribution member 13 accommodated in the current collection / distribution member accommodation portion 32b from the radially outer side, and is provided in the current collection / distribution member accommodation portion 32b. A hole portion 52a penetrating the outer peripheral wall portion 52 in the radial direction is formed such that a part of the positioning member 51 is cut out at a position on the radially outer side of the positioning member 51.
The hole portion 52a of the outer peripheral wall portion 52 is provided at a position on the radially outer side of the lead wire portion 34a which is positioned by the positioning member 51 and drawn out from the stator coil 34 toward the radially outer side. When the conductive wire is wound around the bobbin portion of the insulating bobbin 32 when the wire 34 is formed, the conductive wire drawn out to the radially outward side is drawn out with a desired tension. When the lead wire portion 34a is formed by cutting at a predetermined position in the radial direction, a lead cutting tool (not shown) or the like is required to be disposed at the predetermined position in the radial direction. In addition, an insulating resin material (not shown) is filled in the current collection / distribution member accommodating portion 32b in which the current collection / distribution member 13 is accommodated.

  The bus rings 41U, 41V, and 41W for each phase are sequentially stacked coaxially from the other axial direction to the other, and are sandwiched by a plurality of clamping members 46,. The terminal connection portions 44, 44, 44 of the lead frames 42, 42, 42 of the bus rings 41U, 41V, 41W of the respective phases are arranged so as to be adjacent to each other at predetermined intervals in the circumferential direction. Has been. And the clamping member 46 is arrange | positioned between the terminal connection parts 44 and 44 of a mutually different phase adjacent in the circumferential direction. The length of the holding member 46 in the longitudinal direction (that is, the tangential direction in the circumferential direction) is the distance between the terminal connecting portions 44 and 44 of mutually different phases adjacent in the circumferential direction (that is, as shown in FIG. And the pinching member 46 disposed between the terminal connection portions 44 and 44 is set to be substantially equal to the distance between the bent portions 44b and 44b of the terminal connection portions 44 and 44 facing each other. It is positioned and fixed in the circumferential direction so as to be sandwiched by the terminal connecting portions 44, 44 from both sides of the.

  As a result, the stator coils 34 of the stator pieces 12a of the phases corresponding to the bus rings 41U, 41V, 41W of the phases are connected to each other, and the lead wire portion including one end of the stator coil 34 of the stator pieces 12a of the U phase 34a are connected to each other via a bus ring 41U, and lead-out wire portions 34a composed of one end of the stator coil 34 of each V-phase stator piece 12a are connected to each other via a bus ring 41V. Lead wire portions 34a formed from one end of the stator coil 34 are connected to each other via a bus ring 41W.

  For example, as shown in FIG. 1, the midpoint connecting member 14 is a connection that connects the other ends of the stator coils 34 of the stator pieces 12 a and 12 a adjacent to each other in the circumferential direction by, for example, fusing (heat caulking). A member 14a is provided, and the other ends of the stator coils 34,..., 34 of the stator pieces 12a,. An insulating resin material (not shown) is filled in the midpoint connecting member housing portion 32c in which the midpoint connecting member 14 is housed.

  As described above, according to the power collection and distribution structure of the rotating electrical machine according to this embodiment, the plurality of clamping members 46,..., 46 for fixing the three-phase bus rings 41U, 41V, 41W are connected to the bus rings 41U, 41V. , 41W, and the same shape that is mounted from the radially inner side toward the radially outer side at a predetermined circumferential position, thereby reducing the number of parts and cost required for the configuration of the current collecting and distributing member 13, and collecting and distributing power It can prevent that the process which comprises the member 13 takes a complicated trouble.

On the other hand, the bus rings 41U, 41V, and 41W for each phase that are coaxially stacked in the axial direction are clamped and fixed, for example, as in the power collection and distribution member 61 of the comparative example of the above-described embodiment shown in FIGS. Therefore, a plurality of types, for example, three types of first to third clamping members 62, 63, 64 are provided, and radially inward from the radially outer side at a portion near the power supply terminal 43 of the lead frame 42 for each phase. A first clamping member 62 mounted to the side, a second clamping member 63 mounted from the radially inner side to the radially outer side, and the terminals other than the vicinity of the power supply terminal 43 of the lead frame 42 for each phase In the case where the bus rings 41U, 41V, 41W are clamped and fixed by the third clamping member 64 mounted from the radially outer side to the radially inner side at a portion other than the vicinity of the connecting portion 44, a current collecting / distributing member Parts required for 61 configuration The number and costs are increased, it takes complicated troublesome steps constituting the electricity collection and distribution member 61, it is impossible to improve the productivity, a problem arises.
On the other hand, according to the embodiment of the present invention, the power collection / distribution member 13 is configured by the single-shaped sandwiching member 46, whereby productivity can be improved.

  Further, the clamping member 46 mounted between the terminal connection portions 44 and 44 of mutually different phases adjacent in the circumferential direction is positioned and fixed by the bent portions 44b and 44b of the terminal connection portions 44 and 44 opposed in the circumferential direction. The mounting position accuracy of the plurality of sandwiching members 46, ..., 46 can be easily improved.

  Further, since the sandwiching member 46 made of an electrically insulating material is arranged on the radially outer side of the lead wire portion 34a of each stator coil 34, the respective bus rings 41U, 41V, 41W and each stator coil are held by the sandwiching member 46. 34 can secure desired electrical insulation between the lead wire portion 34a and the projecting portion 46d of the clamping member 46 is a hole provided in the outer peripheral wall portion 52 of the current collecting and distributing member accommodating portion 32b. The hole 52a of the outer peripheral wall 52 is closed in a state where the power collecting / distributing member 13 is accommodated in the power collecting / distributing member accommodating portion 32b, so that the insulating member is provided in the power collecting / distributing member accommodating portion 32b. A closed space for filling the resin material can be formed by the sandwiching member 46.

Furthermore, by making the cross-section of the concave groove 46a of the clamping member 46 to which the bus rings 41U, 41V, 41W are mounted substantially elliptical, for example, the arc-shaped portions of the bus rings 41U, 41V, 41W such as an annular shape can be appropriately formed. For example, the bus ring 41U, 41V, 41W is not limited to a polygonal ring or the like, and the bus ring 41U, 41V, 41W can be held by the clamping member 46 even when there is no linear portion. 41U, 41V, 41W can be fixed.
Moreover, in the state where the arc-shaped portions of the bus rings 41U, 41V, 41W are mounted on the concave groove portion 46a having a substantially elliptical cross section in the circumferential direction, the radial direction in the inner peripheral surface 42B of the arc-shaped portion and the concave groove portion 46a. Whereas the inner bottom 46c comes into contact with a relatively small area, the outer peripheral surface 42A of the arcuate part and the radially outward opening 46b in the groove 46a have a relatively large area. The contact between the bus rings 41U, 41V, 41W and the sandwiching member 46 is dispersed and an excessively large load is prevented from acting.

  Further, when the stator coil 34 is formed by the conducting wire, the conducting wire is wound around the bobbin portion of the insulating bobbin 32 and then drawn out radially outward, and is cut at a predetermined radial position to be drawn out wire portion 34a. Is formed, the hole 52a of the outer peripheral wall portion 52, which is necessary for arranging a wire cutting tool (not shown) or the like at a predetermined radial position, is closed by the clamping member 46. Thus, a closed space for filling an insulating agent around the bus ring 41U, 41V, 41W and the lead wire portion 34a of the stator coil 34 can be formed by the outer peripheral wall portion 52 and the sandwiching member 46.

  In the above-described embodiment, the lead frame 42 has an annular shape. However, the present invention is not limited to this. For example, as shown in FIGS. In this polygonal annular lead frame 42, linear portions adjacent in the circumferential direction are connected so as to form a predetermined angle, and each clamping member 46 has a diameter from the radially inner side to the linear portion of the lead frame 42. Mounted facing outward in the direction.

It is a disassembled perspective view of the stator which concerns on embodiment of this invention. 1 is a perspective view of a lead frame according to an embodiment of the present invention. It is a principal part perspective view of the current collection and distribution member which concerns on embodiment of this invention. It is a principal part perspective view of the stator which concerns on embodiment of this invention. It is a principal part top view of the stator which concerns on embodiment of this invention. It is the figure which looked at the clamping member which concerns on embodiment of this invention from the axial direction. It is sectional drawing in the tangent direction of the circumferential direction of the clamping member which concerns on embodiment of this invention. It is a principal part perspective view of the current collection and distribution member which concerns on the comparative example of embodiment of this invention. It is a principal part perspective view of the stator which concerns on the comparative example of embodiment of this invention. It is a perspective view of the lead frame concerning the modification of an embodiment of the invention. It is a principal part perspective view of the current collection and distribution member which concerns on the modification of embodiment of this invention. It is a principal part perspective view of the stator which concerns on the modification of embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Stator 13 Current collection / distribution member 34 Stator coil (coil)
34a Lead wire part 41U, 41V, 41W Bus ring 42 Lead frame 44 Terminal connection part (connection part)
44b Bent part (fixed part)
45 Connection terminal (terminal part)
46 Clamping member 46a Concave groove part 46d Projection part 52 Outer peripheral wall part 52a Hole part

Claims (8)

A multi-phase bus ring for connecting coils of the same phase for each phase of a multi-phase rotating electrical machine;
A plurality of clamping members that are mounted from a radially inner side toward a radially outer side at a predetermined circumferential position of the bus rings of the plurality of phases, and sandwich and fix the bus rings of the plurality of phases;
The plurality of clamping members are configured in the same shape ,
The bus ring includes a connecting portion that protrudes radially inward at a predetermined circumferential position and is connected to the lead wire portion of the coil of the same phase,
The clamping member is disposed between the connection portions adjacent in the circumferential direction of the bus ring of the plurality of phases,
It said connection unit, electricity collection and distribution structure of the rotary electric machine characterized by Rukoto includes the fixing portion for positioning and fixing the clamping member mounted between the connecting portions adjacent in the circumferential direction of the bus ring of the plurality of phases. A multi-phase bus ring for connecting coils of the same phase for each phase of a multi-phase rotating electrical machine;
A plurality of clamping members that are mounted from a radially inner side toward a radially outer side at predetermined circumferential positions of the bus rings of the plurality of phases and clamp the bus rings of the plurality of phases;
With
The plurality of clamping members are configured in the same shape,
The clamping member includes a concave groove portion that extends in a substantially circumferential direction on a radially outer surface on the basis of a radial direction and a circumferential direction of the bus ring and is fitted with the bus ring.
The substantially circumferential cross section of the concave groove portion is substantially elliptical shape with a major axis extending in the radial direction,
The bus ring includes a curved portion that curves radially outward,
Electricity collection and distribution structure of the curved portion you characterized in that it is mounted on the groove portion rotating electrical machine of the bus ring. A multi-phase bus ring for connecting coils of the same phase for each phase of a multi-phase rotating electrical machine;
A plurality of clamping members that are mounted from a radially inner side toward a radially outer side at predetermined circumferential positions of the bus rings of the plurality of phases and clamp the bus rings of the plurality of phases;
With
The plurality of clamping members are configured in the same shape,
An outer peripheral wall covering the radially outer side of the bus ring;
The outer peripheral wall portion is provided with a hole at a position on the radially outer side of the lead wire portion of the coil,
The clamping member is electricity collection and distribution structure to that rotary electric machine characterized by closing the hole part of the outer peripheral wall portion. The clamping member includes a protruding portion that protrudes radially outward from the surface on the radially outer side with respect to the radial direction of the bus ring, and that can be attached to the hole portion of the outer peripheral wall portion,
The power distribution structure for a rotating electrical machine according to claim 3 , wherein the protruding portion is attached to the hole portion of the outer peripheral wall portion and closes the hole portion. 5. The power collection and distribution structure for a rotating electrical machine according to claim 4 , wherein the clamping member includes a recessed groove portion that extends in a circumferential direction on a surface on the outer peripheral side and in which the bus ring is mounted. The bus ring includes a connecting portion that protrudes radially inward at a predetermined circumferential position and is connected to the lead wire portion of the coil of the same phase,
The said clamping member is arrange | positioned between the said connection parts adjacent in the circumferential direction of the said bus ring of the said several phase, The power collection and distribution of the rotary electric machines as described in any one of Claim 2 to 5 characterized by the above-mentioned. Construction. The lead wire portion of the coil is connected to the bus ring or a terminal portion connected to the bus ring,
The rotating electrical machine according to any one of claims 1 to 6 , wherein the clamping member is disposed on a radially outer side of the lead wire portion with respect to a radial direction of the bus ring. Current collection and distribution structure. The rotating electrical machine according to claim 6 , wherein the connecting portion includes a fixing portion that positions and fixes the holding member that is mounted between the connecting portions adjacent to each other in the circumferential direction of the bus rings of the plurality of phases. Current collection and distribution structure.

Images