JP6281266B2 - Terminal connection structure of rotating electrical machine - Google Patents

Description

  The present invention relates to a terminal connection structure for a rotating electrical machine in which a coil terminal connected to a stator coil is connected to an external device connection terminal block.

  Conventionally, electric vehicles such as electric vehicles and hybrid vehicles driven by a rotating electric machine such as a three-phase AC motor / generator are known. In such a vehicle, the U-phase, V-phase, and W-phase coil terminals drawn from the stator of the three-phase alternating current rotating electrical machine are routed through a terminal block provided in the housing of the rotating electrical machine, and the inverter and the running battery are connected. It is connected to an external power source or the like including it (see Patent Document 1).

  In Patent Document 1, in a rotating electrical machine including a terminal block, a terminal member corresponding to a coil terminal taken out from the coil end of the stator coil, a bus bar having one end connected to the terminal member, and the other end connected to the terminal block; Is provided. The bus bar is formed of an L-shaped metal having one end connected to the terminal member, the other end facing the coil end, and bending from the rotor rotation axis direction to the rotor radial direction. In this case, female screws are provided at both ends of the bus bar, and the screw inserted into the terminal member and the terminal block can be freely positioned by moving through the long holes provided in the terminal member and the terminal block. Has been.

JP 2009-44869 A

  However, in the above conventional example, the terminal block and the terminal member are connected via the bus bar. For this reason, when connecting the terminal member and the terminal block, the bus bar is bolted to the terminal block for each phase (U, V, W phase) on the one hand, and the phase (U, V, W phase) on the other hand. It is necessary to fasten the bolt to the terminal member every time, and there is a problem that the number of parts such as the fastening bolt including the bus bar increases.

  Accordingly, the present invention has been made in view of the above problems, and an object thereof is to provide a terminal connection structure for a rotating electrical machine suitable for electrically connecting a terminal block and a terminal member while reducing the number of parts. To do.

The present invention is directed to a rotating electrical machine that includes a stator having a stator coil, a rotor that is rotatably provided in the stator, and a housing that houses the stator and the rotor. Then, in the present invention, an insulating holder leaving a plurality of terminal members and its these electrical connecting surface that are respectively connected to a plurality of lead wires drawn from the coil end of the stator coil in the axial direction of the rotor made of an insulating material One end of each of the terminal module fixed inside the casing and the terminal member exposed to the terminal module is in contact with the electrical connection surface of the terminal module, and the other end leaves the conductor drawn out of the casing. A terminal block fixed to the housing from the outside, and a contact surface pressure applying means for press-contacting the one end of the conductor and the electrical connection surface of the terminal member in the terminal module. . The insulating holder has an insulating wall or an insulating groove for insulating a plurality of terminal members.

  Therefore, in the present invention, the conductor and the terminal member are combined together by the insulating holder to form the terminal block and the terminal module, the terminal module is fixed in the casing, and the terminal block is fixed to the casing. Can be completed. For this reason, even if the number of conductors and terminal members increases, it is not necessary to increase the number of mounting bolts as fixing members, and the number of parts can be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic block diagram of the terminal-connection structure of the rotary electric machine of 1st Example which shows embodiment of this invention. It is a schematic block diagram which shows the example of a housing | casing to which the terminal connection structure of a rotary electric machine is applied similarly. It is a perspective view which shows a terminal module. It is a perspective view which shows the connection state of a terminal module and a lead wire. It is sectional drawing which shows the state which fixed the terminal module in the cover as a housing | casing of a rotary electric machine. It is a perspective view which shows the fixed state shown in FIG. It is a perspective view which shows a terminal block. It is sectional drawing which shows the state which attached the terminal block to the housing | casing of a rotary electric machine. It is explanatory drawing which shows the connection state of a terminal module and a terminal block. It is explanatory drawing which shows the attachment process of the terminal block to the cover as a housing | casing. It is explanatory drawing which shows the attachment state of the terminal block to the cover as a housing | casing. It is sectional drawing which shows the terminal connection structure of the rotary electric machine of 2nd Example. It is sectional drawing which shows the terminal connection structure of the rotary electric machine of 3rd Example. It is sectional drawing which shows the terminal connection structure of the rotary electric machine of 4th Example.

  Hereinafter, a terminal connection structure of a rotating electrical machine of the present invention will be described based on embodiments.

  The rotating electrical machine having the terminal connection structure of the present embodiment is used as, for example, an electric motor such as a three-phase motor, a generator, or a motor / generator having both functions of the electric motor and the generator. This type of rotating electrical machine is used as a traveling motor or a motor generator of a hybrid vehicle in which an engine and a traveling motor are mounted as a vehicle drive source, or an electric vehicle such as an electric vehicle and a fuel cell vehicle.

  FIG. 1 is a schematic cross-sectional view showing a rotating electrical machine having the terminal connection structure of the present embodiment. As shown in FIG. 1, the rotating electrical machine 100 includes a cylindrical stator 20 that is fixed inside a housing 42 as a housing. The rotating electrical machine 100 includes a rotating shaft 11 that is rotatably supported by a bearing 12 on a housing 41 or a cover 41 that is fixed to an open end of the housing 42, and is fixed to the rotating shaft 11 and is rotatable. Includes a rotor 10 that faces the stator 20 via an air gap.

  The stator 20 includes a stator core 20A made of a laminated steel plate having a plurality of teeth (not shown) on the inner periphery, and a plurality of stator coils 21 mounted in a slot space (not shown) between the teeth. In the illustrated example, the plurality of stator coils 21 have coil end 21A portions arranged at the axial end portions of the stator core 20A so as to protrude from the axial end portions of the slot space and wind the axial end portions of the teeth. It is shown in the figure.

  Each stator coil 21 has a wire end (not shown) connected by a coil end 21A so that three phases of U, V, and W are formed, and each end of the U, V, and W phases has a stator. It is connected to three lead wires 22 (U, V, W) drawn from the end of 20.

  In the rotating electrical machine 100 shown in FIG. 1, three lead wires 22 (U, V, W) drawn in the axial direction of the housing 42 from the coil end 21 </ b> A to the open end of the housing 42 as a housing containing the stator 20. And a cover 41 as a housing is attached to the open end of the housing 42. In addition, as a housing | casing of the rotary electric machine 100, the one of the axial direction of the housing 42 is open | released and the other of the axial direction is shown closed by the end wall 42A. However, as shown in FIG. 2, it is assumed that both ends of the housing 42 as a housing containing the stator 20 formed in a cylindrical shape are opened and covers 41 are attached to both ends of the housing 42. Good. Hereinafter, the direction of the rotating shaft 11 is referred to as “axial direction” and the direction orthogonal to the rotating shaft 11 is referred to as “radial direction” with reference to the rotating shaft 11 of the rotating electrical machine 100.

  In the terminal connection structure of this embodiment, the end of each lead wire 22 is electrically connected to a terminal member 25 constituting a coil terminal held by an insulating holder 24 formed of an insulating member, and the insulating holder 24 is connected to the terminal member 25. A terminal module 23 fixed inside the casing (cover 41) of the rotating electrical machine 100 is provided. The conductor 32 that can contact the terminal member 25 of the terminal module 23 is held and held by an insulating holder 31 formed of an insulating member, and the insulating holder 31 is attached to the terminal module 23 from the radial direction with respect to the terminal module 23. A terminal block 30 fixed to the housing (cover 41) is provided. Accordingly, each lead wire 22 can be connected to an external device (inverter) of the rotating electrical machine 100 via the terminal member 25 of the terminal module 23 and the conductor 32 of the terminal block 30 electrically connected to the terminal member 25. Yes.

  As shown in FIG. 3, the terminal module 23 includes three terminal members 25 constituting U, V, and W phases, and an insulating holder 24 that is molded and held integrally while being insulated from each other. Prepare. The insulating holder 24 is formed so as to protrude from both ends of the terminal member 25 in the arrangement direction, and integrally includes a mounting piece 24A including a mounting hole 24B. The insulating holder 24 is fixed inside the cover 41, which is a casing of the rotating electrical machine 100, by passing the mounting bolt 24C through the mounting hole 24B of the mounting piece 24A.

  These terminal members 25 are arranged at a predetermined interval and arranged in the insulating holder 24, and a part of the surface that becomes the electrical connection surface 25 </ b> B is exposed to the conductor 32 of the terminal block 30, so that the insulating holder 24 is exposed. Is molded. One end of each terminal member 25 is formed so as to protrude from the insulating holder 24, and a ring member 25 </ b> A connected to the tip end portion of each lead wire 22 protruding from the end portion of the stator 20 is integrally provided at the protruding portion. .

  Moreover, in order to ensure the creeping insulation distance between the terminal members 25, the insulating holder 24 includes an insulating wall 24 </ b> D in which a part of the insulating holder 24 is formed in a protruding shape between the terminal members 25. In order to secure the creeping insulation distance, an insulating groove in which a part of the insulating holder 24 is formed in a concave shape may be provided between the terminal members 25. These insulating walls 24D or insulating grooves are fitted with insulating grooves or insulating walls provided in the terminal block 30 as described later.

  As shown in FIG. 4, the tip end portion of each lead wire 22 protruding from the end portion of the stator 20 is introduced and fitted to the ring member 25 </ b> A provided in the terminal member 25 and joined by thermal caulking. The heat caulking is electrically conducted by passing an electric current through the fitting portion between each lead wire 22 and the ring member 25A to peel off the coating of the fitting contact portion of the lead wire 22, and then the ring member 25A is caulked. This is solid phase bonding for mechanically and electrically connecting the lead wires 22 with each other. Thereby, the terminal module 23 is fixed integrally with the lead wire 22 in a state where the terminal member 25 is electrically connected to the end portion of the lead wire 22.

  As shown in FIG. 5, the terminal module 23 fixed to the tip of the lead wire 22 is inserted into the cover 41 fixed to the end of the housing 42 after approaching the open end of the housing 42 from the axial direction. The mounting piece 24 </ b> A is seated on the mounting seat 41 </ b> A provided on the cover 41. A mounting seat 41A provided on the cover 41 is formed by a bottom surface of a radial hole 41C connected to an outer peripheral surface of the cover 41 provided on the cover 41, and an axially inner edge portion of the mounting seat 41A forms a tapered shape 41B. The cover 41 is continuous with the inner surface in the axial direction. Accordingly, when the cover 41 is attached, the terminal module 23 is guided to the attachment seat 41A using the taper shape 41B provided on the inner side in the axial direction of the attachment seat 41A of the cover 41 as a guide. Thereby, when attaching the cover 41 to the housing 42, the terminal module 23 can be smoothly positioned on the attachment seat 41 </ b> A of the cover 41. In this state, a cover 41 as a housing is fixed to a housing 42 as a housing.

  As shown in FIG. 5, the upper side of the mounting seat 41 </ b> A of the cover 41, that is, the outer side in the radial direction of the mounting seat 41 </ b> A is opened by a radial hole 41 </ b> C continuous to the outer peripheral surface of the cover 41. In FIG. 6, a part of the cover 41 is broken so that a part of each of the terminal module 23 and the lead wire 22 can be confirmed. The terminal block 30 is inserted into the radial hole 41C as will be described later. Next, the mounting bolt 24C is inserted into the radial hole 41C from the outer periphery of the cover 41, the mounting bolt 24C is passed through the mounting hole 24B of the mounting piece 24A of the terminal module 23, and a mounting screw (not shown) provided on the mounting seat 41A. Screw into the hole. As a result, the terminal module 23 is fixed to the cover 41 as shown in FIG.

  In this state, the terminal module 23 is configured such that a part of the surface that becomes the electrical connection surface 25B with respect to the conductor 32 of the terminal block 30 is in the penetration direction of the radial hole 41C at the bottom portion of the radial hole 41C. It is exposed. The terminal module 23 is fixed in the cover 41 with its periphery surrounded by the cover 41.

  In this state, since the terminal members 25 are combined into one as the terminal module 23 by the insulating holder 24, it is necessary to increase the number of mounting bolts 24C as fixing members even if the number of terminal members 25 increases. In addition, the number of parts can be reduced. Further, since the terminal members 25 are aligned by the insulating holder 24 and their electrical connection surfaces 25B are exposed, the terminal members 25 can be connected to the conductors 32 of the terminal block 30 in a lump. Moreover, since the terminal member 25 is covered with the insulating holder 24, an insulation state is ensured between each phase and between peripheral components. Moreover, since the terminal module 23 is covered with the cover 41 including the connection part with the lead wire 22, it is not necessary to provide the covers 41 for covering these.

  As shown in FIG. 7, the terminal block 30 includes three conductors 32 constituting U, V, and W phases, and an insulating holder 31 that molds and holds them integrally while being insulated from each other. .

  These conductors 32 have the same width as the terminal member 25 of the terminal module 23. In addition, the conductors 32 are arranged at the same intervals as the terminal members 25 and are held in an embedded state in the insulating holder 31. Then, as shown in FIG. 8, both end portions of each conductor 32 in the radial direction are disposed so as to be exposed from the insulating holder 31. A portion of the conductor 32 exposed to the outside in the radial direction from the insulating holder 31 forms an external terminal 32A for an external device. In addition, the portion of the conductor 32 that is exposed radially inward from the insulating holder 31 is bent in a direction along the bottom surface of the insulating holder 31, and the bent portion also protrudes inward in the radial direction. It is bent to form a leaf spring and is elastically deformable. And the bent part which became the convex of the "<"-shaped "contacts the terminal member 25 of the terminal module 23 in the whole width direction, and comprises the electrical connection contact 32B. That is, a connection contact 32 </ b> B that contacts the terminal member 25 of the terminal module 23 is provided on the bottom surface of the insulation holder 31, and an external terminal 32 </ b> A is provided on the top surface of the insulation holder 31.

  The insulating holder 31 holds and arranges the three conductors 32 and protrudes to both sides in the conductor 32 arrangement direction from the upper body region 31A inserted into the radial hole 41C provided in the cover 41 and the upper region of the body portion 31A. And a mounting piece 31B integrated with each other. Mounting holes 31C are formed in the mounting pieces 31B, respectively.

  Further, as shown in FIG. 9, an insulating wall 24 </ b> D provided between the terminal members 25 so as to ensure a creeping insulation distance between the terminal members 25 of the terminal module 23 is provided on the bottom surface of the insulating holder 31 of the terminal block 30. An insulating groove 31D is provided between the connection contacts 32B. In addition, in order to ensure the creeping insulation distance, when an insulating groove is provided between the terminal members 25 of the terminal module 23, the insulating groove 31 fits on the bottom surface of the insulating holder 31 of the terminal block 30. Insulate walls.

  As shown in FIG. 9, the connection contacts 32 </ b> B of the conductor 32 of the terminal block 30 have the same width dimension and are arranged at the same interval as the electrical connection surface 25 </ b> B of the terminal member 25 of the terminal module 23. For this reason, when the terminal block 30 is brought close to the terminal module 23 and the connection contact 32B is brought into contact with the connection surface 25B, the contact area between the two can be increased and contact failure can be prevented.

  As shown in FIG. 10, the terminal block 30 inserts the body portion 31 </ b> A into the radial hole 41 </ b> C of the cover 41 that is a housing portion of the rotating electrical machine 100. Then, as shown in FIG. 11, the attachment piece 31B is brought into contact with the surface of the cover 41, and the attachment bolt 31E is passed through the attachment hole 31C of the attachment piece 31B, thereby being fixed to the cover 41.

  In this attachment, as shown in FIGS. 8 and 11, the insulating wall 24 </ b> D provided in the terminal module 23 is fitted into the insulating groove 31 </ b> D on the bottom surface of the terminal block 30. Then, the leaf spring-shaped connection contact 32 </ b> B of the conductor 32 provided on the terminal block 30 contacts the electrical connection surface 25 </ b> B of the terminal member 25 of the terminal module 23. As the mounting bolt 31E is tightened, the terminal block 30 enters the cover 41, and the leaf spring connection contact 32B contacting the terminal member 25 of the terminal module 23 is elastically deformed to increase the contact surface pressure. The contact resistance between the two is reduced to achieve stable electrical connection. Further, the electrical connection between the terminal member 25 and the conductor 32 is formed by a leaf spring-shaped connection contact 32B formed by bending the end of the conductor 32. For this reason, it is not necessary to add a spring component as a separate component as the contact surface pressure imparting unit that applies pressure to the connection portion, and the number of components can be reduced.

  In the present embodiment, the conductor 32 and the terminal member 25 are combined into one by the insulating holders 24 and 31 to form the terminal block 30 and the terminal module 23, the terminal module 23 is fixed in the housing, and the terminal block 30 is fixed. Wiring is completed only by fixing to the housing. For this reason, even if the number of conductors 32 and terminal members 25 increases, the number of mounting bolts 24C and 31E as fixing members (for example, two for fixing the terminal module 23 and two for fixing the terminal block 30, totaling 4), and the number of parts can be reduced. Incidentally, in the prior art, a total of eight fastening bolts, six for connecting the bus bar, the coil terminal, and the conductor of the terminal block, and two for fixing the terminal block, are required. In this embodiment, the bus bar required in the prior art can be eliminated, and the number of parts can be reduced in this respect as well.

  In the prior art, the coil terminal and the bus bar are bolted, and the bus bar and the conductor of the terminal block are bolted. For this reason, the operation | work which fastens a some volt | bolt for wiring and the operation | work for fixing a terminal block are required, and the wiring operation | work cannot be implemented efficiently. Further, in order to bolt the coil terminal and the bus bar and to bolt the bus bar and the conductor of the terminal block, a bolt for connecting the bus bar and the bus bar to the coil terminal and the conductor of the terminal block is required, and a housing for housing these It was necessary to increase the radial dimension.

  On the other hand, in this embodiment, the body part 31A of the terminal block 30 is simply inserted into the radial hole 41C provided in the cover 41 and fixed to the cover 41, and the terminal member 25 of the terminal module 23 and the terminal block 30 are fixed. An electrical connection with the conductor 32 can be realized. For this reason, the wiring work can be carried out efficiently. Further, the electrical connection between the terminal member 25 of the terminal module 23 and the conductor 32 of the terminal block 30 is achieved simply by inserting the body portion 31A of the terminal block 30 into the radial hole 41C provided in the cover 41 and fixing it to the cover 41. Connection can be realized. For this reason, the space required for the wiring work can be minimized, and the radial dimension of the housing accommodating the terminal connection structure can be reduced. In addition, the connection portion between the conductor 32 of the terminal block 30 and the terminal member 25 of the terminal module 23 is such that both the terminal block 30 and the terminal module 23 are fixed to the same cover 41 that is the casing of the rotating electrical machine 100. Contact failure due to vibration can be prevented. Moreover, since the connection part of the terminal member 25 of the terminal module 23 and the conductor 32 of the terminal block 30 is covered with the cover 41, it is not necessary to provide covers for covering them.

  12 to 14 show second to fourth examples of the terminal connection structure of the present embodiment. In the terminal connection structure of the second embodiment shown in FIG. 12, as a contact surface pressure applying means, a terminal member 25 provided in the terminal module 23 is used instead of the tip of the conductor 32 provided in the terminal block 30 having a leaf spring shape. The tip of the plate is bent into a leaf spring shape. For this reason, the tip of the conductor 32 provided on the terminal block 30 is bent in a planar shape along the bottom surface of the insulating holder 31 so that the radially inner side surface thereof becomes the connection surface 32C. Instead, the tip of the terminal member 25 of the terminal module 23 is bent into a “shape” that is convex outward in the radial direction, and the convex bent portion becomes a leaf spring shape that becomes the connection contact 25C. . Other configurations are the same as those in the first embodiment.

  Also in the terminal connection structure of the second embodiment, similarly to the terminal connection structure shown in the first embodiment, the conductor 32 and the terminal member 25 are combined into one by the insulating holders 24 and 31, respectively, and the terminal block 30 and the terminal module. 23. For this reason, even if the number of conductors 32 and terminal members 25 increases, it is not necessary to increase the number of mounting bolts 24C and 31E as fixing members, and the number of parts can be reduced. Moreover, the electrical connection between the terminal member 25 of the terminal module 23 and the conductor 32 of the terminal block 30 is achieved simply by inserting the body portion 31A into the radial hole 41C provided in the cover 41 and fixing the terminal block 30 to the cover 41. Since the connection can be realized, the wiring work can be performed efficiently. In addition, the connection portion between the conductor 32 of the terminal block 30 and the terminal member 25 of the terminal module 23 is such that both the terminal block 30 and the terminal module 23 are fixed to the same cover 41 that is the casing of the rotating electrical machine 100. Contact failure due to vibration can be prevented.

  Also in the terminal connection structure of the second embodiment, the leaf spring-shaped connection contact 25C of the terminal member 25 provided in the terminal module 23 is the conductor of the terminal block 30 as in the terminal connection structure shown in the first embodiment. 32 electrical connection surfaces 32C are contacted. Then, the terminal block 30 enters the cover 41 as the mounting bolt 31E is tightened. As a result, the leaf spring-shaped connection contact 25C formed by the terminal member 25 of the terminal module 23 that is in contact with the conductor 32 of the terminal block 30 is elastically deformed to increase the contact surface pressure, thereby reducing the contact resistance between the two. Achieve stable electrical connection. Further, since the electrical connection between the terminal member 25 and the conductor 32 is formed by a leaf spring-shaped connection contact 25C formed by bending the end of the terminal member 25, a contact surface that applies pressure to the connection portion. As the pressure applying means, it is not necessary to add a spring part as a separate part, and the number of parts can be reduced.

  In the terminal connection structure of the third embodiment shown in FIG. 13, as the contact surface pressure applying means, either the conductor 32 or the terminal member 25 is replaced with a leaf spring shape, and the conductor is formed by a separate elastic body 33. The end portion of 32 is pressed against the connection surface 25 </ b> B of the terminal member 25 of the terminal module 23. For this reason, the end portion of the conductor 32 provided on the terminal block 30 is bent into an L shape at the tip portion to form a connection contact 32D, and is configured to contact the connection surface 25B of the terminal member 25 of the terminal module 23. In the illustrated example, the conductor 32 is configured to be movable in the radial direction with respect to the insulating holder 31, and the conductor 32 is urged radially inward by the elastic body 33, so that the conductor 32 is connected to the connection surface 25 </ b> B of the terminal member 25 of the terminal module 23. On the other hand, an electrical connection is achieved. Alternatively, the conductor 32 may be fixed so as not to move with respect to the insulating holder 31, and instead, the connection contact 32 </ b> D bent in an L shape may swing inward in the radial direction by the urging force of the elastic body 33. As the elastic body 33, for example, a compression coil spring 33A is generally used, but other elastic bodies may be used. Other configurations are the same as those in the first embodiment.

  Also in the terminal connection structure of the third embodiment, as in the terminal connection structure shown in the first embodiment, the conductor 32 and the terminal member 25 are combined into one by the insulating holders 24 and 31, respectively, and the terminal block 30 and the terminal module. 23. For this reason, even if the number of conductors 32 and terminal members 25 increases, it is not necessary to increase the number of mounting bolts 24C and 31E as fixing members, and the number of parts can be reduced. Moreover, the electrical connection between the terminal member 25 of the terminal module 23 and the conductor 32 of the terminal block 30 is achieved simply by inserting the body portion 31A into the radial hole 41C provided in the cover 41 and fixing the terminal block 30 to the cover 41. Since the connection can be realized, the wiring work can be performed efficiently. In addition, the connection portion between the conductor 32 of the terminal block 30 and the terminal member 25 of the terminal module 23 is such that both the terminal block 30 and the terminal module 23 are fixed to the same cover 41 that is the casing of the rotating electrical machine 100. Contact failure due to vibration can be prevented.

  Also in the terminal connection structure of the third embodiment, as in the case of the terminal connection structure shown in the first embodiment, the connection contact 32D of the conductor 32 provided on the terminal block 30 is applied to the terminal module by the urging force of the elastic body 33. 23 is in contact with the electrical connection surface 25B of the terminal member 25 provided on the terminal 23. As the mounting bolt 31E is tightened, the terminal block 30 enters the cover 41, and the elastic body 33 is compressed accordingly. Thereby, the contact surface pressure between the connection contact 32D of the conductor 32 of the terminal block 30 and the electrical connection surface 25B of the terminal member 25 of the terminal module 23 is increased, and the electrical resistance is reduced by reducing the contact resistance between the two. And realized.

  Further, the electrical connection between the terminal member 25 and the conductor 32 is realized in a pressure contact state by an urging force of an elastic body 33 that is separate from these. For this reason, it is not necessary to process the end portions of the terminal member 25 and the conductor 32 as contact surface pressure applying means, as compared with the case where the terminal member 25 and the conductor 32 are pressed into contact with each other as a leaf spring shape. In addition, when the elastic body 33 as the contact surface pressure applying means is the compression coil spring 33A, the stroke amount can be made larger than that of the leaf spring. For this reason, even if the distance between the two changes due to the elastic deformation in the radial direction of the cover 41 as a housing or the mounting position error between the terminal block 30 and the terminal module 23, both the position errors are absorbed and both The electrical connection between them can be realized stably.

  In the terminal connection structure of the fourth embodiment shown in FIG. 14, as the casing of the rotating electric machine 100, one of the housings 42 in the axial direction is closed by the end wall 42B, and the other of the housings 42 in the axial direction is opened. At the same time, it is intended to be closed by a cover 41. In this embodiment, the terminal connection structure is provided not on the open end side to which the cover 41 of the housing 42 is attached but on the side of one end wall surface 42B in the axial direction where the housing 42 is closed.

  Therefore, in this embodiment, a radial hole 41C is provided on the closed end wall surface 42B side of the housing 42, and the bottom surface of the radial hole 41C is used as a mounting seat 42C for the terminal module 23. That is, the mounting seat 42 </ b> C provided on the wall surface of the housing 42 is configured by the bottom surface of the radial hole 42 </ b> D connected to the outer peripheral surface of the housing 42 provided on the housing 42. Then, it is desirable that the axially inner edge portion of the mounting seat 42C has a tapered shape and is continuous with the inner surface of the end wall surface 42B, as in the first embodiment.

  In the present embodiment, the terminal module 23 is applied to the three lead wires 22 (U, V, W) in the stator 20 on which the stator coil 21 is mounted before being assembled to the housing 42, as in the first embodiment. The terminal member 25 is mechanically and electrically solid-phase bonded by thermal caulking. Thus, an assembly in which the terminal module 23 and the stator 20 are integrated is formed.

  Next, the stator 20 is inserted into the housing 42 from the open end of the housing 42 with the terminal module 23 being advanced, and the mounting piece 42C is provided on the mounting seat 42C provided on the end wall surface 42B of the housing 42. 24A is seated and positioned. In this state, the stator 20 is fixed to the housing 42 as a housing. Further, the mounting bolt 24C is inserted into the radial hole 42D from the outer periphery of the end wall surface 42B of the housing 42, and the mounting bolt 24C is passed through the mounting hole 24B of the mounting piece 24A of the terminal module 23 and provided on the mounting seat 42C ( Screw into the mounting screw hole (not shown). Thereby, the terminal module 23 is fixed to the end wall surface 42B in the housing 42 as shown in FIG.

  In this state, in the terminal module 23, a part of the surface that becomes the electrical connection surface 25 </ b> B with respect to the conductor 32 of the terminal block 30 is respectively formed in the penetration direction of the radial hole 42 </ b> D at the bottom portion of the radial hole 42 </ b> D. It is exposed. The terminal module 23 is fixed in the housing 42 with the periphery surrounded by the housing 42.

  In this state, since the terminal members 25 are combined into one as the terminal module 23 by the insulating holder 24, it is necessary to increase the number of mounting bolts 24C as fixing members even if the number of terminal members 25 increases. In addition, the number of parts can be reduced. Further, since the terminal members 25 are aligned by the insulating holder 24 and their electrical connection surfaces 25B are exposed, the terminal members 25 can be connected to the conductors 32 of the terminal block 30 in a lump. Moreover, since the terminal member 25 is covered with the insulating holder 24, an insulation state is ensured between each phase and between peripheral components. Moreover, since the terminal module 23 is covered with the housing 42 including the connection part with the lead wire 22, it is not necessary to provide covers for covering them.

  Next, the body portion 31 </ b> A of the insulating holder 31 in the terminal block 30 is inserted into the radial hole 42 </ b> D of the housing 42 that is the housing portion of the rotating electrical machine 100. Then, the mounting piece 24A is brought into contact with the surface of the housing 42, the mounting bolt 24C is passed through the mounting hole 24B of the mounting piece 24A, and fixed to the housing 42.

  In this attachment, the insulating wall 24 </ b> D provided on the terminal module 23 is fitted into the insulating groove 31 </ b> D on the bottom surface of the terminal block 30, and the leaf spring-shaped connection contact 32 </ b> B of the conductor 32 provided on the terminal block 30 is connected to the terminal module 23. It contacts the electrical connection surface 25B of the member 25. As the mounting bolt 24C is tightened, the terminal block 30 enters the housing 42, and the leaf spring-shaped connection contact 32B contacting the terminal member 25 of the terminal module 23 is elastically deformed to increase the contact surface pressure. The contact resistance between the two is reduced to achieve stable electrical connection. Further, the electrical connection between the terminal member 25 and the conductor 32 is formed by a leaf spring-shaped connection contact 32B formed by bending the end of the conductor 32. For this reason, it is not necessary to add a spring component as a separate component as the contact surface pressure imparting unit that applies pressure to the connection portion, and the number of components can be reduced.

  In addition, it can also comprise similarly to 2nd Example which makes the front-end | tip of the terminal member 25 a leaf | plate spring shape as a contact surface pressure provision means. Further, as in the third embodiment, the contact surface pressure applying means presses the end portion of the conductor 32 against the connection surface 25B of the terminal member 25 of the terminal module 23 with a separate elastic body 33. You may do. Other configurations are the same as those in the first embodiment.

  Also in this embodiment, the conductor 32 and the terminal member 25 are combined into one by the insulating holders 24 and 31 to constitute the terminal block 30 and the terminal module 23. For this reason, even if the number of conductors 32 and terminal members 25 increases, it is not necessary to increase the number of mounting bolts 24C and 31E as fixing members, and the number of parts can be reduced. Moreover, the electrical connection between the terminal member 25 of the terminal module 23 and the conductor 32 of the terminal block 30 is achieved simply by inserting the body portion 31 </ b> A into the radial hole 42 </ b> D provided in the housing 42 and fixing the terminal block 30 to the housing 42. Connection can be realized. For this reason, the wiring work can be carried out efficiently. In addition, the connection portion between the conductor 32 of the terminal block 30 and the terminal member 25 of the terminal module 23 is such that both the terminal block 30 and the terminal module 23 are fixed to the same housing 42 that is the casing of the rotating electrical machine 100. Contact failure due to vibration can be prevented. Moreover, since the connection part of the terminal member 25 of the terminal module 23 and the conductor 32 of the terminal block 30 is covered with the housing 42, it is not necessary to provide covers for covering them.

  In the present embodiment, the following effects can be achieved.

  (A) A rotating electrical machine 100 including a stator 20 having a stator coil 21, a rotor 10 rotatably provided in the stator 20, and a housing that houses the stator 20 and the rotor 10. And it comprised from the terminal member 25 each connected to the lead wire 22 pulled out from the coil end 21A of the stator coil 21 to the rotor 10 axial direction, and the insulation holder 24 which consists of an insulating material, leaving the electrical connection surface 25B. One end of each of the terminal module 23 fixed inside the housing and the electrical connection surface 25B of the terminal member 25 provided exposed to the terminal module 23 is brought into contact with the other end of the conductor 32 and both ends thereof. A contact surface that is made up of an insulating holder 31 made of an insulating material and is fixed to the housing from the outside, and one end of the conductor 32 and the electrical connection surface 25B of the terminal member 25 in the terminal module 23. And a connection contact 32B in the form of a leaf spring as pressure applying means. That is, the conductor 32 and the terminal member 25 are combined together by the insulating holders 24 and 31 to form the terminal block 30 and the terminal module 23, the terminal module 23 is fixed in the casing, and the terminal block 30 is fixed to the casing. I just try to complete the wiring. For this reason, even if the number of conductors 32 and terminal members 25 increases, the number of mounting bolts 24C and 31E as fixing members (for example, two for fixing the terminal module 23 and two for fixing the terminal block 30, totaling 4), and the number of parts can be reduced.

  (A) The contact surface pressure applying means was formed by connecting contact points 25C and 32B having a leaf spring shape by bending one end of the conductor 32 or the tip of the terminal member 25. For this reason, it is not necessary to add a spring component as a separate component as the contact surface pressure imparting unit that applies pressure to the connection portion, and the number of components can be reduced.

  (C) In the second embodiment, the contact surface pressure applying means is formed by a leaf spring-shaped connection contact 25C by bending the tip of the terminal member 25. Also in this embodiment, it is not necessary to add a spring part as a separate part as the contact surface pressure applying means for applying pressure to the connection part, and the number of parts can be reduced.

  (D) In the third embodiment, the contact surface pressure applying means is constituted by the elastic body 33 that urges the one end of the conductor 32 or the terminal member 25 in a direction to contact the terminal member 25 side or one end side of the conductor 32. . That is, the electrical connection between the terminal member 25 and the conductor 32 is realized in a pressure contact state by the urging force of the elastic body 33 that is separate from these. For this reason, it is not necessary to process the end portions of the terminal member 25 and the conductor 32 as contact surface pressure applying means, as compared with the case where the terminal member 25 and the conductor 32 are pressed into contact with each other as a leaf spring shape.

  (E) In the third embodiment, a compression coil spring 33 </ b> A is used as the elastic body 33. That is, the compression coil spring 33A can make the stroke amount larger than that of the leaf spring. For this reason, even if the distance between the two changes due to the elastic deformation in the radial direction of the cover 41 as a housing or the mounting position error between the terminal block 30 and the terminal module 23, both the position errors are absorbed and both The electrical connection between them can be realized stably.

  (F) One end of the conductor 32 and the terminal member 25 which are contacted by the contact surface pressure applying means are formed to have the same width dimension. For this reason, when the terminal block 30 is brought close to the terminal module 23 and the connection contact 32B is brought into contact with the connection surface 25B, the contact area between the two can be increased and contact failure can be prevented.

  (G) In the first to third embodiments, the casing in which the terminal module 23 is fixed inside and the terminal block 30 is fixed from the outside is the cover 41 fixed to the open end of the housing 42 that houses the stator 20. It is. That is, since the connection part of the terminal member 25 of the terminal module 23 and the conductor 32 of the terminal block 30 is covered with the cover 41, it is not necessary to provide covers for covering them.

  (H) In the fourth embodiment, the casing in which the terminal module 23 is fixed inside and the terminal block 30 is fixed from the outside is opened at one end in the axial direction and closed at the other end wall 42B. The housing 42 accommodates the stator 20. The terminal module 23 and the terminal block 30 are provided on the end wall surface 42B side of the housing 42. That is, since the connection part of the terminal member 25 of the terminal module 23 and the conductor 32 of the terminal block 30 is covered with the housing 42, it is not necessary to provide covers for covering them.

DESCRIPTION OF SYMBOLS 10 Rotor 11 Rotating shaft 12 Bearing 20 Stator 21 Stator coil 21A Coil end 22 Lead wire 23 Terminal module 24, 31 Insulating holder 24A, 31B Mounting piece 24B, 31C Mounting hole 24C, 31E Mounting bolt 24D Insulating wall 25 Terminal member 25A Ring member 25B, 32C connection surface 25C, 32B, 32D connection contact 30 terminal block 31A body part 32 conductor 32A external terminal 33 elastic body 33A compression coil spring 41 cover 41A, 42C mounting seat 41B taper shape 41C, 42D radial hole 42 housing 42B end Wall surface 100 Rotating electric machine

Claims (8)

A rotating electrical machine comprising a stator having a stator coil, a rotor provided rotatably in the stator, and a housing that houses the stator and the rotor,
A plurality of terminal members which are respectively connected to a plurality of lead wires drawn to the rotor shaft direction from the coil end of the stator coil, its insulating holder consisting of those of the electrical connection surfaces leaving insulating material, is composed of A terminal module fixed inside the housing;
The one end to the electrical connection surface of the terminal member provided is exposed to the terminal module contacts respectively, the other end a conductor to be drawn to the outside of the housing, an insulating holder made of an insulating material leaving the two ends, consists A terminal block fixed to the housing from the outside,
Contact surface pressure applying means for press-contacting one end of the conductor and the electrical connection surface of the terminal member in the terminal module ,
The insulating holder, the terminal connection structure of the rotary electric machine, characterized in Rukoto to have a insulating wall or insulating trench insulating the plurality of the terminal member. 2. The terminal connection structure for a rotating electrical machine according to claim 1, wherein the contact surface pressure applying means is formed by a leaf spring-shaped contact contact by bending one end of the conductor or the tip of the terminal member.   2. The terminal connection structure for a rotating electrical machine according to claim 1, wherein the contact surface pressure applying means is formed by a leaf spring-shaped contact contact by bending a tip of the terminal member.   2. The rotation according to claim 1, wherein the contact surface pressure applying means is constituted by an elastic body that urges one end of the conductor or a terminal member in a direction to contact the terminal member side or one end side of the conductor. Electrical terminal connection structure.   The rotating electrical machine terminal connection structure according to claim 4, wherein the elastic body is a compression coil spring.   6. The rotating electrical machine according to claim 1, wherein the one end of the conductor and the terminal member that are contacted by the contact surface pressure applying unit are formed to have an equal width dimension. Terminal connection structure.   7. The housing in which the terminal module is fixed inside and the terminal block is fixed from outside is a cover fixed to an open end of a housing that houses a stator. The terminal connection structure of the rotary electric machine as described in any one of the above.   The casing in which the terminal module is fixed inside and the terminal block is fixed from the outside is a housing in which one end in the axial direction is opened and the other end is closed by a wall surface to accommodate the stator. The terminal connection structure for a rotating electrical machine according to any one of claims 1 to 6, wherein a terminal module and a terminal block are provided on the wall surface side.

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