JP2015139262A - terminal block - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a terminal block which can fix a coil-side terminal to a connection member from the opposite side of a terminal block body part to the disposition side of the coil-side terminal.SOLUTION: In the terminal block, a connection member includes a male screw part provided in a manner to protrude from the tip surface of a columnar part. The terminal block body part includes a columnar through-hole through which the columnar part penetrates. A connection member holding part has a rotation restriction part which restricts the rotation of a fastening member to a circumferential direction while permitting the movement of the fastening member to a shaft direction. The male screw part penetrates through a terminal through-hole of the coil-side terminal inserted into the terminal insertion hole, to be screwed into a female screw part. The coil-side terminal is sandwiched and is fixed between the tip surface of the columnar part and the fastening member.

Description

  The present invention relates to a terminal block for fixing a coil side terminal which is a terminal connected to a coil conductor constituting a coil of an electric motor and which has a terminal through hole at a tip end portion.

As such a terminal block, for example, a terminal block described in Patent Document 1 below is already known. In the technique of Patent Document 1, the terminal block has a terminal block main body that holds the connection member, and the terminal block main body has a through-hole through which the connection member passes. Moreover, the bolt which fixes a coil side terminal to a connection member is provided separately from the connection member. Therefore, it is necessary to fix the coil side terminal to the connecting member by rotating the bolt with a tool on the same side where the coil side terminal is disposed with respect to the terminal block main body.
In the technique of Patent Document 1, the side on which the coil-side terminal is disposed with respect to the terminal block main body is inside the case member that houses the electric motor, and thus the bolt needs to be rotated inside the case member. Therefore, an opening 74 for inserting the tool inside the case member is provided in the case member, and a lid member 70 for closing the opening 74 is provided.

JP-A-9-182352

  That is, in the technique of Patent Document 1, in order to insert a tool on the side where the coil-side terminal is disposed with respect to the terminal block main body, a dedicated opening is provided in the case member, and a lid member that closes the opening is provided. There is a need. Therefore, layout constraints increase, such as the need to provide an opening at a position where a tool can be inserted, and the number of parts and the number of work steps increase.

  Therefore, it is desired to realize a terminal block that can fix the coil-side terminal to the connecting member from the side opposite to the side where the coil-side terminal is disposed with respect to the terminal block main body.

  According to the present invention, a terminal block connected to a coil conductor constituting a coil of an electric motor and fixing a coil side terminal having a terminal through hole at a distal end portion is connected to the coil side terminal. A connection member that is a tip, a fastening member that fixes the coil-side terminal to the connection member, and a terminal base body that holds the connection member and the fastening member, and the connection member is formed in a column shape. A columnar portion and a male screw portion provided so as to protrude in the axial direction of the columnar portion from the tip surface of the columnar portion, and the fastening member includes a female screw portion screwed into the male screw portion, The terminal base body includes a columnar part through-hole through which the columnar part penetrates in the axial direction, a terminal insertion hole into which the coil-side terminal is inserted along a direction intersecting the axial direction, and the terminal insertion hole In the axial direction across A fastening member holding part that is provided on the opposite side of the columnar part through-hole side and that holds the fastening member coaxially with the male screw part, wherein the fastening member holding part is in the axial direction of the fastening member A rotation restricting portion that restricts rotation of the fastening member in the circumferential direction while allowing the male screw portion to penetrate the terminal through hole of the coil side terminal inserted into the terminal insertion hole. And the coil side terminal is sandwiched and fixed between the front end surface of the columnar part and the fastening member.

According to this characteristic configuration, since the male screw portion is provided so as to protrude in the axial direction of the columnar portion from the tip surface of the columnar portion of the connecting member, when the columnar portion is passed through the columnar portion through-hole, the columnar portion With respect to the portion of the terminal block main body provided with the part through hole, the male screw part can be arranged on the side where the coil side terminal is arranged, and the columnar part can be arranged on the opposite side. Therefore, by rotating the columnar part on the side opposite to the side where the coil-side terminal is disposed with respect to the portion of the terminal block main body part provided with the columnar part through hole, the male screw part of the fastening member Can be screwed together. The fastening member holding portion that holds the fastening member during the screwing includes a rotation restricting portion that restricts the circumferential rotation of the fastening member while allowing the fastening member to move in the axial direction. There is no need to hold the member with a tool, and the fastening member is moved in the axial direction simply by rotating and screwing the columnar part, and the coil side terminal is sandwiched and fixed between the fastening member and the tip surface of the columnar part. can do.
Thus, the coil side terminal can be fixed to the connecting member by rotating the columnar part on the side opposite to the side where the coil side terminal is disposed with respect to the terminal block main body. Therefore, in order to fix the coil-side terminal to the connecting member, it is possible to suppress an increase in the constraint condition of the terminal block layout, and it is possible to suppress an increase in the number of parts and work man-hours.

  Here, the terminal block main body portion includes an attachment portion that is attached to an opening portion of a case member that accommodates the electric motor, and an in-case arrangement portion that is inserted from the opening portion and disposed inside the case member. Provided, at least the terminal insertion hole and the fastening member holding portion are provided in the case arrangement portion, and the connection member is disposed on a portion outside the case member with respect to a portion penetrating the columnar portion through hole. It is preferable that an operated portion to which a tool for rotating the male screw portion is fitted is formed.

  According to this configuration, the tool is fitted to the operated portion of the connection member disposed outside the case member and rotated with respect to the terminal insertion hole and the fastening member holding portion disposed inside the case member. Thus, the coil-side terminal can be fixed to the connecting member by screwing the male screw portion into the female screw portion from the outside of the case member. For this reason, it is not necessary to provide the case member with a dedicated opening for inserting the tool inside the case member, and it is not necessary to provide a lid member for closing the opening for the tool. Therefore, it is possible to suppress an increase in layout constraint conditions, such as the need to provide an opening at a position where a tool can be inserted, and it is possible to suppress an increase in the number of parts and work man-hours.

  Here, the columnar part through hole includes a fitting inner peripheral surface that fits to the outer peripheral surface of the columnar part, and a seal member is provided between the fitting inner peripheral surface and the outer peripheral surface of the columnar part. It is preferable that

  According to this configuration, it is possible to easily ensure the sealing performance between the one end side and the other end side of the columnar portion through hole in a state where the columnar portion penetrates the columnar portion through hole.

  Here, the terminal block main body portion includes an attachment portion that is attached to an opening portion of a case member that accommodates the electric motor, and is attached so as to close the opening portion, and between the attachment portion and the case member. It is preferable that a seal member surrounding the entire circumference of the opening is provided.

  According to this configuration, the sealing performance of the opening between the inner side and the outer side of the case member can be easily ensured in a state where the mounting portion of the terminal block main body is attached to the opening of the case member. .

  Here, it is preferable that the fastening member holding portion has an axial movement restricting portion that restricts the axial movement of the fastening member within a certain range.

  According to this configuration, the fastening member is moved in the axial direction as the male screw portion is screwed to the female screw portion of the fastening member while suppressing the fastening member from falling off from the terminal block main body portion, and the coil side terminal is moved. Can be sandwiched and fixed between the fastening member and the front end surface of the columnar part.

  Here, the plurality of connection members are arranged in a row in parallel with each other, and the plurality of coil-side terminals are arranged in a row in parallel with each other at the same pitch as the arrangement pitch of the plurality of connection members. It is preferable that they are arranged in order.

  According to this configuration, a plurality of coil side terminals extending in a row in parallel with each other from the electric motor are inserted into the terminal insertion holes, and the state in which they are aligned in a row in a parallel state is maintained. However, it is possible to connect to a plurality of connection terminals by changing the direction. Therefore, the wiring arrangement configuration can be simplified.

It is sectional drawing of the terminal block of the state attached to the case member based on embodiment of this invention. It is principal part sectional drawing of the terminal block of the state attached to the case member based on embodiment of this invention. It is a disassembled perspective view of the terminal block which concerns on embodiment of this invention. It is the side view which looked at the terminal block in the axis 2nd direction in the state where the lid member concerning the embodiment of the present invention is not attached to the terminal block main-body part. It is sectional drawing of the terminal block in the middle of screwing the external thread part on the internal thread part based on embodiment of this invention.

An embodiment of a terminal block 1 according to the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view of the drive device to which the terminal block 1 is attached, FIG. 2 is a cross-sectional view of the terminal block 1 in a state attached to the case member 60, and FIG. 3 is an exploded view of the terminal block 1. FIG. 4 is a side view of the terminal block 1 viewed in the second axial direction X2 in a state where the lid member 44 is not attached to the terminal block main body 30, and FIG. 5 is a cross-sectional view of the terminal block 1 in the middle of being screwed into the female thread portion 26. FIG.

  The terminal block 1 fixes a coil side terminal 5 connected to a coil conductor 4 constituting the coil 3 of the electric motor 2. The terminal block 1 includes a connection member 10 that is a connection destination of the coil-side terminal 5, a fastening member 25 that fixes the coil-side terminal 5 to the connection member 10, and a terminal block body 30 that holds the connection member 10 and the fastening member 25. And.

The connecting member 10 includes a columnar portion 12 formed in a columnar shape, and a male screw portion 11 provided so as to protrude from the front end surface 13 of the columnar portion 12 in the axial direction X of the columnar portion 12. The fastening member 25 includes a female screw portion 26 that is screwed into the male screw portion 11.
The terminal block main body 30 includes a columnar part through hole 31 through which the columnar part 12 penetrates in the axial direction X, a terminal insertion hole 37 into which the coil side terminal 5 is inserted along the direction intersecting the axial direction X, and terminal insertion. A fastening member holding portion 40 is provided on the opposite side to the columnar portion through hole 31 side in the axial direction X across the hole 37, and holds the fastening member 25 coaxially with the male screw portion 11.
The fastening member holding part 40 has a rotation restricting part 41 that restricts the rotation of the fastening member 25 in the circumferential direction while allowing the fastening member 25 to move in the axial direction X. The male screw portion 11 passes through the terminal through hole 6 of the coil side terminal 5 inserted into the terminal insertion hole 37 and is screwed into the female screw portion 26 of the fastening member 25, and the coil side terminal 5 is connected to the tip end surface of the columnar portion 12. 13 and the fastening member 25 are sandwiched and fixed.

  Here, the axial direction X of the columnar part 12 is a direction parallel to the axis of the columnar part 12. The axial direction X of the columnar part 12 also coincides with the axial direction of the male screw part 11, and can also be defined as the axial direction of the male screw part 11. In the axial direction X, a direction in which the male screw portion 11 extends from the tip surface 13 of the columnar portion 12 is defined as an axial first direction X1, and an opposite direction of the axial first direction X1 is defined as an axial second direction X2.

In the present embodiment, the terminal block 1 is a terminal block corresponding to a three-phase AC motor 2 including three coil conductors 4 and a coil-side terminal 5, and as shown in FIGS. 3 and 4, Three connection members 10 and fastening members 25 are provided. Further, the terminal block main body 30 includes three columnar portion through holes 31 through which the columnar portions 12 of the connection members 10 penetrate, three terminal through holes 6 into which the coil side terminals 5 are inserted, and fastening members 25. And three fastening member holding portions 40 for holding the.
In the present embodiment, the three connecting members 10 are arranged in a row in parallel with each other, and the three coil side terminals 5 are in parallel with each other at the same pitch as the arrangement pitch of the three connecting members 10. Are arranged in a row.
Here, the direction in which the three connection members 10 and the coil side terminals 5 are arranged in a line is defined as an arrangement direction Y.

1. Attachment to Case Member 60 In this embodiment, the terminal block 1 is attached so as to close the opening 61 of the case member 60 that houses the electric motor 2, as shown in FIGS. Therefore, the terminal block main body 30 includes an attachment portion 45 that is attached to the opening 61 and is attached so as to close the opening 61. In the present embodiment, the case member 60 also houses a power transmission device 7 such as a transmission that transmits the driving force of the electric motor 2 to the wheels.

  The terminal block main body 30 includes an in-case arrangement portion 50 that is inserted from the opening 61 and arranged inside the case member 60, and at least the terminal insertion hole 37 and the fastening member holding portion 40 are arranged in the case arrangement portion. 50. And the coil side terminal 5 extended from the electric motor 2 is inserted in the terminal insertion hole 37 inside the case member 60. Here, the inside of the case member 60 means a portion or region that is not exposed to the outside of the case member 60 and the terminal block 1 in a state where the opening 61 of the case member 60 is closed by the terminal block 1. The outside of the member 60 means a portion or a region exposed to the outside of the case member 60 and the terminal block 1 in a state where the opening 61 of the case member 60 is closed by the terminal block 1.

  The columnar part through hole 31 is a through hole that penetrates the inside and the outside of the case member 60. Therefore, the first axial direction X1 coincides with the direction from the outer side to the inner side of the case member 60 in the columnar part through-hole 31, and the second axial direction X2 corresponds to the direction of the case member 60 in the columnar part through-hole 31. It corresponds to the direction from the inside to the outside. In the present embodiment, the axial direction X coincides with a direction orthogonal to the portion of the outer surface 62 of the case member 60 to which the terminal block 1 (mounting portion 45) is fixed. The first axial direction X1 side is the inside of the case member 60 and the second axial direction X2 side is the outer side of the case member 60 with respect to the wall portion of the terminal block main body 30 through which the columnar part through-hole 31 passes.

  As shown in FIG. 3, the connecting member 10 is inserted into the columnar part through-hole 31 from the front end of the male screw part 11 from the outside of the case member 60 (in the second axial direction X2 side). As shown in FIGS. 2 and 5, the male screw portion 11 passes through the columnar portion through-hole 31 and is disposed inside the case member 60. The end of the columnar part 12 on the first axial direction X1 side is inserted into the columnar part through hole 31 to close the columnar part through hole 31.

  In the present embodiment, the columnar portion 12 extends also to the outside (the second axial direction X2 side) of the case member 60 with respect to the portion that penetrates the columnar portion through hole 31. An operated portion in which a tool 76 for rotating the male screw portion 11 is fitted to a portion on the outside (second axial direction X2 side) of the case member 60 with respect to a portion passing through the columnar portion through-hole 31 in the connection member 10. 16 is formed. In this example, the operated portion 16 is formed at the end of the columnar portion 12 on the second axial direction X2 side. Further, the operated portion 16 is a portion in which the cross section of the columnar portion 12 is formed in a hexagonal shape, and a tool 76 such as a spanner or a wrench is fitted and rotated.

  As described above, the male screw portion 11 is disposed inside the case member 60, and similarly penetrates the terminal through hole 6 of the coil-side terminal 5 disposed inside the case member 60, and is disposed inside the case member 60. Then, it is screwed into the female thread portion 26 of the fastening member 25. At this time, since the operated portion 16 is disposed outside the case member 60, the male screw portion 11 can be rotated from the outside of the case member 60 and screwed into the female screw portion 26.

<Seal mechanism>
The terminal block 1 is provided with a sealing mechanism so that the liquid tightness of the case member 60 is maintained and lubricating oil or the like does not leak from the inside to the outside of the case member 60.
As shown in FIG. 2, the columnar portion through hole 31 includes a fitting inner peripheral surface 32 that fits to the outer peripheral surface 14 of the columnar portion 12, and the fitting inner peripheral surface 32 and the outer peripheral surface of the columnar portion 12. 14 is provided with a seal member 15. An annular groove that is recessed inward in the radial direction is formed on the outer peripheral surface 14 of a large-diameter column part 18 to be described later in the columnar part 12, and an O made of an elastic member is used as the seal member 15 in the annular groove. The ring is fitted.

  Further, a seal member 46 made of an elastic member that surrounds the entire circumference of the opening 61 is provided between the attachment portion 45 and the case member 60. In the present embodiment, the attachment portion 45 is fixed to the outer surface 62 of the portion of the case member 60 that forms the opening 61. In the present embodiment, the terminal block main body 30 is made of a resin member, and the strength for sandwiching the seal member 46 between the case member 60 and the resin member alone is insufficient. Therefore, the attachment portion 45 includes a frame member 49 made of a metallic material. The frame member 49 connects the flange portion 47 and the seal member 46 of the terminal block main body portion 30 to the outer side surface 62 of the case member 60. It is fixed to the case member 60 with being sandwiched between them. With the frame member 49, the terminal block main body 30 can be fixed to the case member 60, and the seal member 46 can be sandwiched between the case member 60 and the terminal block main body 30.

  The frame member 49 is opened at a position overlapping the opening 61, and is formed in an annular plate shape surrounding the entire periphery of the opening 61 as shown in FIG. The frame member 49 includes a bolt insertion hole 48 into which a bolt is inserted. The frame member 49 is fixed to the case member 60 from the outside (the second axial direction X2 side) of the case member 60 with a bolt. The flange portion 47 extends outward from the portion of the terminal block main body portion 30 disposed inside the opening 61 and is formed in an annular plate shape surrounding the entire periphery of the opening 61. The seal member 46 is sandwiched between the flange portion 47 and the outer surface 62 of the case member 60, and is formed in an annular belt shape surrounding the entire periphery of the opening 61 (see FIG. 4).

<Inner case extension 52>
In the present embodiment, as shown in FIGS. 1 and 2, the terminal insertion hole 37 is formed in the case member 60 so that the coil-side terminal 5 extending from the coil 3 is inserted as it is inside the case member 60. It is arranged on the inner side (first axial direction X1 side) with respect to the inner side surface 63. Accordingly, the fastening member holding portion 40 and the columnar portion through hole 31 are also arranged on the inner side (the first axial direction X1 side) with respect to the inner side surface 63 of the case member 60. For this reason, the portion of the terminal base body 30 where the terminal insertion hole 37, the fastening member holding part 40, and the columnar part through-hole 31 are formed (hereinafter referred to as the hole forming body 51) It arrange | positions with respect to the side surface 63 inside (axis 1st direction X1 side). The terminal block main body 30 extends from a mounting portion 45 (flange portion 47) attached to the outer side surface 62 of the case member 60 to a hole forming main body portion 51 arranged on the inner side with respect to the inner side surface 63 of the case member 60. The case extension part 52 is provided.

As shown in FIGS. 1 to 4, the hole forming main body 51 is formed in a cubic block shape, and each side is parallel to the axial direction X or the outer surface 62 of the adjacent case member 60. Yes. The case extension 52 is a cylindrical shape that extends in the axial direction X from the inner end of the annular flange 47 to the outer annular end of the end surface on the second axial direction X2 side of the hole forming main body 51. Is formed. The space inside the case extension 52 is closed by the hole-forming main body 51 on the first axial direction X1 side, but is open to the outside of the case member 60 on the second axial direction X2 side. In the present embodiment, the end surface of the hole forming main body 51 on the second axial direction X2 side and the inner end of the flange portion 47 are formed in a rectangular shape, and the case extension 52 is formed in a rectangular shape. It is formed in the cylinder shape which has a cross section.
By providing the in-case extension portion 52, the extension of the in-case extension portion 52 depends on the position of the coil side terminal 5 extending from the coil 3 inside the case member 60 and the wall thickness of the case member 60. The extension length in the axial direction X can be adjusted to suit these arrangements.

<Extending to the outside of the columnar part 12>
As shown in FIGS. 1 and 2, the columnar portion 12 extends from the portion inserted into the columnar portion through hole 31 to the position on the axial second direction X2 side with respect to the mounting portion 45. The inner side extends in the second axial direction X2.
An intermediate connection portion 17 for connecting an intermediate connection member 71 (in this example, a bus bar) connected to the inverter 70 is formed at the end of the columnar portion 12 on the second axial direction X2 side. In the present embodiment, the intermediate connection portion 17 is a female screw portion in which a thread is formed on the inner peripheral surface of the bolt insertion hole extending from the end surface of the columnar portion 12 on the second axial direction X2 side to the first axial direction X1 side. ing. The center line of the intermediate connection portion 17 (internal thread portion) coincides with the axis of the columnar portion 12 and the external thread portion 11. A through hole 72 through which the bolt 74 passes is formed at the tip of the intermediate connection member 71. The bolt 74 is inserted into the through hole 72 from the second axial direction X2 side, and is then screwed into the intermediate connection portion 17 (female screw portion) to fix the intermediate connection member 71 to the columnar portion 12.

  The end of the intermediate connection portion 17 on the second axial direction X2 side is disposed on the outer side (second axial direction X2 side) with respect to the case member 60 and the attachment portion 45, and from the inverter 70 on the outer side of the case member 60. The extended intermediate connection member 71 can be connected as it is. Further, the operated portion 16 is disposed on the outer side (second axial direction X2 side) with respect to the case member 60 and the attachment portion 45, and a tool 76 such as a spanner is fitted on the outer side of the case member 60. It is easy to rotate (see FIG. 5).

<Current sensor 79>
As shown in FIGS. 1 to 3, a space is formed between the case extension 52 and each columnar portion 12, and the space is as shown in FIGS. 1 and 2. It is an arrangement space of a current sensor 79 that detects a current flowing through the columnar portion 12. The current sensor 79 is of a type having a ring-shaped core that surrounds each columnar portion 12. A coreless current sensor that does not have a ring-shaped core may be used. As described above, the current sensor 79 is disposed in a space formed in a portion connecting the inner side and the outer side of the case member 60, and is an outer side (axial second direction X2 side) space with respect to the outer surface 62 of the case member 60. Can be prevented from being narrowed due to the arrangement of the current sensor 79. Therefore, the accommodation space of the inverter 70 covered with the inverter case 73 can be reduced in size. The inverter case 73 is a case that covers the terminal block 1 and the inverter 70 so as not to be exposed to the outside, and is fixed to the case member 60.

2. Detailed Configuration of Terminal Block 1 As shown in FIGS. 1 to 3, the terminal block main body 30 (hole forming main body 51) includes a columnar portion through-hole 31 through which the columnar portion 12 penetrates in the axial direction X, and an axial direction X. A terminal insertion hole 37 into which the coil-side terminal 5 is inserted along a direction intersecting with, and a fastening member holding portion 40 that holds the fastening member 25 coaxially with the male screw portion 11.

  The terminal insertion hole 37 is provided on the first axial direction X1 side of the columnar part through hole 31 and intersects and communicates with the columnar part through hole 31. Therefore, the columnar portion through-hole 31 opens into the terminal insertion hole 37 on the first axial direction X1 side. The fastening member holding part 40 is provided on the side opposite to the columnar part through hole 31 side in the axial direction X across the terminal insertion hole 37 (on the first axial direction X1 side), and communicates with the columnar part through hole 31. .

  The columnar part through-hole 31 has a small-diameter hole 34 having a smaller diameter than the large-diameter hole 33 on the second axial direction X2 side at the end on the first axial direction X1 side. The large diameter hole 33 and the small diameter hole 34 are formed in a cylindrical shape. The inner diameter changes stepwise between the large-diameter hole portion 33 and the small-diameter hole portion 34, and has an annular hole step surface 35. The columnar portion 12 has a small-diameter column portion 19 having a smaller diameter than the large-diameter column portion 18 on the second axial direction X2 side at the end on the first axial direction X1 side. The large diameter column portion 18 and the small diameter column portion 19 are formed in a cylindrical shape. The outer diameter changes stepwise between the large-diameter column portion 18 and the small-diameter column portion 19, and has an annular column step surface 20. The large diameter column portion 18 and the large diameter hole portion 33 are fitted, and the small diameter column portion 19 and the small diameter hole portion 34 are fitted. With this configuration, when the male screw portion 11 is screwed into the female screw portion 26, the small diameter hole portion 34 is sandwiched from both sides in the axial direction X by the large diameter column portion 18 (column step surface 20) and the coil side terminal 5, The columnar portion 12 can be restricted from moving in the axial direction X with respect to the terminal block main body portion 30. Therefore, the connecting member 10 can be stably fixed to the terminal block main body 30 in the axial direction X. As described above, an annular groove is formed in the large-diameter column portion 18, and an O-ring 15 is fitted therein.

  Here, the axial length of the small-diameter column portion 19 is slightly longer than the axial length of the small-diameter hole portion 34, and the columnar portion is in a state where the column step surface 20 is in contact with the hole step surface 35. 12 (small-diameter column portion 19) of the tip end surface 13 on the side in the first axial direction X1 slightly protrudes into the terminal insertion hole 37. Thereby, when the external thread part 11 is screwed together with the internal thread part 26, the front end surface 13 of the columnar part 12 and the coil side terminal 5 can be contacted and connected.

  In order to fix the male screw portion 11 to the columnar portion 12, a bolt insertion hole 21 having a thread formed extending from the tip surface 13 of the columnar portion 12 on the first axial direction X1 side to the second axial direction X2 side is formed. ing. The male screw portion 11 has a foundation bolt portion 22 formed with a thread that extends in the second axial direction X2 side with respect to the main body portion projecting from the distal end surface 13 of the columnar portion 12 in the first axial direction X1 side. I have. The foundation bolt part 22 is screwed into the bolt insertion hole 21, and the male screw part 11 is fixed to the columnar part 12. In addition, in this application, when only calling the external thread part 11, it shall point out the main-body part which protrudes in the axial direction X from the front end surface 13 of the columnar part 12. FIG.

  The male screw portion 11 passes through the terminal through hole 6 of the coil side terminal 5 inserted into the terminal insertion hole 37 and is screwed into the female screw portion 26 of the fastening member 25, and the coil side terminal 5 is connected to the distal end surface of the columnar portion 12. 13 and the fastening member 25 to be sandwiched and fixed. The male screw portion 11 is disposed inside the terminal insertion hole 37 and the fastening member holding portion 40 in a state of being screwed with the female screw portion 26.

In the present embodiment, the terminal insertion hole 37 extends with a straight line intersecting (in the present example, orthogonal) with the center line of the columnar portion through hole 31 as the center line. The center line of the terminal insertion hole 37 is also orthogonal to the arrangement direction Y in which the three terminal insertion holes 37 are arranged in a line. The terminal insertion hole 37 is provided with an enlarged portion 38 whose cross-sectional area gradually increases toward the opening at the end on the opening side where the coil side terminal 5 is inserted, so that the coil side terminal 5 can be easily inserted. It has become.
The terminal insertion hole 37 penetrates the terminal block main body 30 and opens on the side opposite to the side where the coil side terminal 5 is inserted.

  The fastening member 25 includes a female screw portion 26 that is screwed into the male screw portion 11. In the present embodiment, the female screw portion 26 is configured by forming a screw thread on the inner peripheral surface of a through hole that penetrates the fastening member 25 in the axial direction X. The outer peripheral surface of the fastening member 25 is provided with a chamfered processing portion 28 that has been chamfered. The chamfered processing portion 28 is fitted into the rotation restricting portion 41 of the fastening member holding portion 40 to rotate in the circumferential direction. Be regulated. In the present embodiment, as shown in FIGS. 2 and 3, the portion of the fastening member 25 on the side in the second axial direction X <b> 2 is a columnar portion 27 formed in a columnar shape. As shown in FIG. 3 and FIG. 4, the portion on one side X1 is a chamfered portion 28 that is D-cut on both sides of a cylinder having an outer diameter larger than that of the columnar portion 27 and has been chamfered. ing.

The fastening member holding part 40 holds the fastening member 25 coaxially with the male screw part 11. The fastening member holding part 40 has a rotation restricting part 41 that restricts the rotation of the fastening member 25 in the circumferential direction while allowing the fastening member 25 to move in the axial direction X. In the present embodiment, the fastening member holding part 40 has an axial movement restricting part 42 that restricts the movement of the fastening member 25 in the axial direction X within a certain range.
In the present embodiment, the portion on the second axial direction X2 side of the fastening member holding portion 40 has a cylindrical introduction hole 43 through which the cylindrical portion 27 of the fastening member 25 penetrates in the axial direction X and fits. Thus, the fastening member holding portion 40 and the terminal insertion hole 37 communicate with each other through the introduction hole 43. The center line of the introduction hole 43 coincides with the center line of the columnar part through hole 31. The axial length of the introduction hole 43 is shorter than the axial length of the cylindrical portion 27. When the male screw portion 11 is screwed into the female screw portion 26, the state shown in FIG. 5 is changed to the state shown in FIG. 2, and the columnar portion 27 moves the introduction hole 43 in the second axial direction X2 and moves into the terminal insertion hole. 37 protrudes inside, and the end surface of the cylindrical portion 27 on the second axial direction X2 side abuts on the coil side terminal 5.

A portion of the fastening member holding portion 40 on the second axial direction X2 side is a rotation restricting portion 41 that is chamfered in accordance with the chamfering portion 28 of the fastening member 25. In the present embodiment, as shown in FIG. 4, the rotation restricting portion 41 is D-cut on both sides of a cylinder having an inner diameter larger than that of the introduction hole 43 and is subjected to two-side chamfering. The chamfering portion 28 of the fastening member 25 is fitted to the rotation restricting portion 41 and the rotation in the circumferential direction is restricted. As shown in FIGS. 2 and 5, the axial length of the rotation restricting portion 41 is longer than the axial length of the chamfering portion 28 of the fastening member 25, and the chamfering portion 28 is the rotation restricting portion. 41 is configured to be movable in the axial direction X. The second axial direction X2 side of the rotation restricting portion 41 is partially covered by a step surface with the introduction hole 43, and the first axial direction X1 side of the rotation restricting portion 41 is covered by the lid member 44. . Therefore, the movement of the chamfering portion 28 in the axial direction X is restricted within the range of the axial length of the rotation restricting portion 41. In the present embodiment, the lid member 44 and the step surface between the rotation restricting portion 41 and the introduction hole 43 constitute the axial movement restricting portion 42.
As the male screw part 11 is screwed into the female screw part 26, the state shown in FIG. 5 is changed to the state shown in FIG. 2, and the chamfering part 28 moves in the rotation restricting part 41 in the second axial direction X2. As shown in FIG. 2, when the end surface on the second axial direction X2 side of the columnar portion 27 abuts on the coil side terminal 5 and the coil side terminal 5 is sandwiched between the end surface 13 of the columnar portion 12. In addition, a gap is formed between the chamfered portion 28 and the stepped surface of the introduction hole 43.

  The fastening member holding part 40 is formed so as to open to the first axial direction X1 side of the terminal block main body part 30 (hole forming main body part 51). The lid member 44 is attached to the first axial direction X1 side of the terminal block main body 30 so as to cover the opening of the terminal block main body 30. As shown in FIGS. 2 and 3, the lid member 44 is formed in a rectangular plate shape so as to cover the entire end surface of the hole forming main body 51 on the first axial direction X1 side. Hooks 77 extending in the second axial direction X2 are provided on both lateral sides of the lid member 44, and the hooks 77 are respectively provided on the projections 78 provided on both sides of the terminal base body 30. The lid member 44 is fixed to the terminal block main body 30 by being hooked.

  The terminal block main body 30 is inserted into the opening 61 of the case member 60 from the outside of the case member 60 in a state where the lid member 44 is attached and the fastening member 25 is held by the fastening member holding portion 40. Thus, the case member 60 is fixed. Further, the coil side terminal 5 is inserted into the terminal insertion hole 37. Thereafter, the connecting member 10 is inserted into the columnar portion through-hole 31 from the outside of the case member 60 with the male screw portion 11 facing the inner side (the first axial direction X1 side), and the male screw portion 11 is inserted into the terminal through-hole 6. The columnar part 12 is inserted into the columnar part through hole 31. Thereafter, as shown in FIG. 5, a tool 76 is attached to the operated portion 16 of the connection member 10, and the connection member 10 is rotated so that the male screw portion 11 is screwed into the female screw portion 26 of the fastening member 25. By this screwing, the fastening member 25 moves in the second axial direction X2, and the coil-side terminal 5 is sandwiched and fixed between the distal end surface 13 of the columnar portion 12 and the fastening member 25. Thereafter, as shown in FIG. 2, the bolt 74 is inserted into the through hole 72 of the intermediate connection member 71 and screwed into the intermediate connection portion 17 of the connection member 10, so that the intermediate connection member 71 is connected to the connection member 10. The Thereafter, the inverter case 73 is fixed to the case member 60, and the terminal block 1 is covered with the inverter case 73.

  In this embodiment, as shown in FIGS. 3 and 4, the terminal block 1 is a signal line terminal to which a terminal (not shown) attached to the tip of a signal line for the electric motor 2 extending from the electric motor 2 is connected. 75. The signal line terminal 75 passes through the terminal block main body 30 in the axial direction X and connects the inside and outside of the case member 60. A signal line terminal for the electric motor 2 is connected to an end portion of the signal line terminal 75 inside the case member 60 (on the first axial direction X1 side). A terminal (not shown) of an intermediate connection line is connected to an end of the signal line terminal 75 on the outer side (second axial direction X2 side) of the case member 60. The intermediate connection line is connected to a control device (not shown) of the inverter 70 housed in the inverter case 73.

  The signal line terminal 75 includes a sealing mechanism (not shown) that seals the inside and the outside of the case member 60. The signal line for the electric motor 2 includes a signal line for a rotational position sensor (for example, a resolver) for measuring the rotational position of the rotor of the electric motor 2 and a temperature sensor for measuring the temperature of each part such as a coil of the electric motor 2. There are signal lines.

[Other Embodiments]
Finally, other embodiments of the present invention will be described. Note that the configuration of each embodiment described below is not limited to being applied independently, and can be applied in combination with the configuration of other embodiments as long as no contradiction arises.

(1) In the above embodiment, the case where the case member 60 to which the terminal block 1 is attached houses the power transmission device 7 such as a transmission in addition to the electric motor 2 has been described as an example. However, the present invention is not limited to this. That is, the case member 60 may not contain the power transmission device 7 such as a transmission other than the electric motor 2 or may contain another device.

(2) In the above embodiment, the three connection members 10 are arranged in a row in parallel with each other, and the three coil-side terminals 5 are arranged at the same pitch as the arrangement pitch of the three connection members 10. The case where they are arranged in a row in parallel with each other has been described as an example. However, the present invention is not limited to this. That is, the three connecting members 10 may not be arranged in parallel with each other, or may not be arranged in a line. Further, the three coil side terminals 5 may not be arranged in parallel with each other, or may not be arranged in a line.

(3) In the above embodiment, the case where the attachment portion 45 includes the frame member 49 made of a metallic material has been described as an example. However, the present invention is not limited to this. That is, the attachment portion 45 may not include the frame member 49 and may be configured such that the flange portion 47 is fixed to the case member 60 with a bolt. In this case, the thickness of the flange portion 47 may be increased, and the strength for sandwiching the seal member 46 may be ensured.

(4) In the above embodiment, the terminal block 1 is a terminal block corresponding to the three-phase AC electric motor 2, and the case where the terminal block 1 includes the three connection members 10 and the fastening members 25 has been described as an example. . However, the present invention is not limited to this. That is, the terminal block 1 may be configured to include an arbitrary number of connection members 10 and fastening members 25.

(5) In the above embodiment, the seal member 15 is provided between the fitting inner peripheral surface 32 of the columnar portion through-hole 31 and the outer peripheral surface 14 of the columnar portion 12, and the mounting portion 45, the case member 60, The case where the seal member 46 is provided between them is described as an example. However, the present invention is not limited to this. That is, when it is not necessary to ensure the sealing property between the inner side and the outer side of the case member 60, the seal member 15 and the seal member 46 may not be provided.

  INDUSTRIAL APPLICABILITY The present invention can be suitably used for a terminal block for fixing a coil side terminal that is connected to a coil conductor that constitutes a coil of an electric motor and that has a terminal through hole at a tip portion.

1: Terminal block 2: Electric motor 3: Coil 4: Coil conductor 5: Coil side terminal 6: Terminal through-hole 10: Connection member 11: Male screw part 12: Columnar part 13: Tip surface 14: Outer peripheral surface 15: Seal member (O ring)
16: Operated portion 18: Large-diameter column portion 19: Small-diameter column portion 20: Column step surface 25: Fastening member 26: Female thread portion 27: Columnar portion 28: Chamfered portion 30: Terminal block main body portion 31: Columnar portion Through hole 32: fitting inner peripheral surface 33: small diameter hole 34: large diameter hole 35: hole step surface 37: terminal insertion hole 40: fastening member holding part 41: rotation restricting part 42: axial movement restricting part 43: Introduction hole 44: Lid member 45: Mounting portion 46: Sealing member 47: Flange portion 49: Frame member 50: In-case arrangement portion 51: Hole-forming main body 52: In-case extension portion 60: Case member 61: Case member Opening 62: Case member outer side surface 63: Case member inner side surface 70: Inverter 71: Intermediate connection member 73: Inverter case X: Axial direction X1: Axial first direction X2: Axial second direction Y: Arrangement direction

Claims (6)

It is a terminal block for fixing a coil side terminal having a terminal through-hole at a tip part, which is a terminal connected to a coil conductor constituting a coil of an electric motor,
A connection member that is a connection destination of the coil-side terminal, a fastening member that fixes the coil-side terminal to the connection member, and a terminal base body that holds the connection member and the fastening member,
The connection member includes a columnar portion formed in a columnar shape, and a male screw portion provided so as to protrude in the axial direction of the columnar portion from the tip surface of the columnar portion,
The fastening member includes a female screw portion that is screwed into the male screw portion,
The terminal base body includes a columnar part through-hole through which the columnar part penetrates in the axial direction, a terminal insertion hole into which the coil-side terminal is inserted along a direction intersecting the axial direction, and the terminal insertion hole A fastening member holding part that is provided on the opposite side to the columnar part through-hole side in the axial direction across the axis, and that holds the fastening member coaxially with the male screw part,
The fastening member holding part includes a rotation restricting part that restricts rotation of the fastening member in the circumferential direction while allowing the fastening member to move in the axial direction.
The male screw portion passes through the terminal through hole of the coil side terminal inserted into the terminal insertion hole and is screwed into the female screw portion of the fastening member, and the coil side terminal is connected to the tip of the columnar portion. A terminal block sandwiched and fixed between a surface and the fastening member. The terminal block main body includes an attachment portion that is attached to an opening of a case member that houses the electric motor, and an in-case arrangement portion that is inserted from the opening and disposed inside the case member,
At least the terminal insertion hole and the fastening member holding portion are provided in the case arrangement portion,
The connected member is formed with an operated portion into which a tool for rotating the male screw portion is fitted in a portion outside the case member with respect to a portion penetrating the columnar portion through hole. Terminal block as described in The columnar part through hole includes a fitting inner peripheral surface that fits to the outer peripheral surface of the columnar part,
The terminal block according to claim 1, wherein a seal member is provided between the fitting inner peripheral surface and the outer peripheral surface of the columnar part. The terminal block main body portion includes an attachment portion that is attached to an opening portion of a case member that houses the electric motor, and is attached so as to close the opening portion,
The terminal block as described in any one of Claim 1 to 3 with which the sealing member surrounding the perimeter of the said opening part is provided between the said attaching part and the said case member.   The terminal block according to any one of claims 1 to 4, wherein the fastening member holding portion includes an axial direction movement restricting portion that restricts movement of the fastening member in the axial direction within a certain range.   The plurality of connection members are arranged in a row in parallel with each other, and the plurality of coil side terminals are arranged in a row in parallel with each other at the same pitch as the arrangement pitch of the plurality of connection members. The terminal block according to any one of claims 1 to 5.

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