JP6094604B2 - Terminal block device - Google Patents

Description

  The present invention relates to a terminal block device, and more particularly to a terminal block device in which a plurality of first wires and a plurality of second wires are electrically connected.

  As a prior art of the terminal block device, for example, a terminal block disclosed in Patent Document 1 is known. The terminal block disclosed in Patent Document 1 is a terminal block including a support body made of resin and insert bolts partially embedded in the support body. The insert bolt includes a bolt and a nut screwed to the bolt. The bolt is attached to the bolt head, the bolt screw portion connected to the bolt head, and the outer peripheral edge of the bolt head on the screw portion side. And a bolt flange portion formed in a shape. The nut is screwed into the bolt screw portion, and has a head-side end surface that comes into contact with the bolt head portion, and a screw portion-side end surface that is opposite to the head-side end surface and from which the bolt screw portion protrudes. In a state in which the nut is screwed onto the bolt, the bolt head portion, the bolt flange portion, and the nut are embedded in the support body, and the threaded portion side end surface protrudes from the surface of the support body.

  According to the terminal block disclosed in Patent Document 1, when the crimp terminal is inserted into the bolt screw portion of the terminal block and fastened with the fixing nut, the crimp terminal is the end surface on the screw portion side of the nut protruding from the surface of the support. It is tightened with a fixing nut while being in contact with At this time, the crimp terminal is pressed against the end surface of the nut on the screw portion side and is tightened in a state where pressure is applied to the end surface of the nut on the screw portion side. Therefore, since the pressure due to tightening of the fixing nut does not act on the support, creep does not occur, and retightening of the fixing nut is unnecessary.

JP 2012-199191 A

  However, although the terminal block disclosed in Patent Document 1 is provided with a plurality of terminals, a partition member is provided between these terminals to insulate the wiring. There is a problem that the direction is restricted to one direction. Moreover, the terminal block disclosed by patent document 1 has the problem that it is necessary to cast into a support body the nut screwed together by a part of volt | bolt and a bolt screw part. In addition, for example, although there are terminal block devices that can select either one of the two directions with respect to the connection direction of the wiring, there is no change in the connection direction of the wiring. The degree of freedom is insufficient.

  The present invention has been made in view of the above problems, and an object of the present invention is to sufficiently increase the degree of freedom in the connection direction of wiring, and to prevent the creep phenomenon without casting a conductive member. And providing a terminal block device.

  In order to solve the above-described problems, the present invention provides a terminal block device in which a first wiring and a second wiring are electrically connected, the terminal block main body formed of an insulating material, and formed of an insulating material. A cover body that covers the terminal block body, a shaft member that is held by the terminal block body and that engages the terminal of the first wiring and the terminal of the second wiring, and the shaft member is inserted through the cover. A cylindrical relay terminal that penetrates the body, and a fastening member that is attached to the shaft member and fixes the terminal of the first wiring and the terminal of the second wiring to the relay terminal, A first seat surface that contacts the terminal of the first wiring between the terminal block body and the cover body; a second seat surface that contacts the terminal of the second wiring outside the cover body; It is characterized by providing.

  According to the present invention, the terminal of the first wiring is brought into contact with the first seat surface of the relay terminal between the terminal base body and the cover body and is locked to the shaft member. Further, the terminal of the second wiring comes into contact with the second seat surface of the relay terminal outside the cover body and is locked to the shaft member. For this reason, the first wiring and the second wiring are indirectly connected via the relay terminal. Therefore, even if an axial force is applied in the axial direction of the shaft member, the axial force does not act on the terminal block main body or the cover body, and creep does not occur. The terminal of the second wiring is connected to the relay terminal outside the cover body. For this reason, the connection direction of the second wiring is not restricted by the structure of the terminal block device. For example, even when there are a plurality of first wirings and a plurality of second wirings, the connection direction of the plurality of second wirings is free. The degree can be made large enough. In this case, the connection direction of the plurality of second wirings may be different for each second wiring.

Further, in the terminal block device, the first wiring and the second wiring are plural, the cover body includes an inner wall surface facing the terminal block body, and the terminal block body includes the inner wall surface and the inner wall surface. It is good also as a structure which is provided in the at least one of the said inner wall surface and the said opposing surface with the opposing opposing surface and partitioning between each wiring of these 1st wiring.
In this case, the insulating partition part can insulate the plurality of first wires from each other and does not impair the degree of freedom in the connection direction of the second wires.

Further, in the terminal block device, a through hole through which the relay terminal is inserted is formed in the cover body, and a retaining member for preventing the relay terminal from dropping from the through hole is provided in the relay terminal. .
In this case, the retaining member can hold the relay terminal on the cover body without dropping from the through hole.

  ADVANTAGE OF THE INVENTION According to this invention, the freedom degree of the connection direction of wiring can fully be enlarged, and the terminal block apparatus which can prevent a creep phenomenon can be provided, without casting an electroconductive member.

1 is a perspective view of an electric motor to which a terminal block device according to an embodiment of the present invention is applied. It is a disassembled perspective view of the terminal block apparatus which concerns on embodiment of this invention. It is a longitudinal cross-sectional view of the principal part of the electric motor to which the terminal block apparatus which concerns on embodiment of this invention is applied. It is a top view of the terminal block main body of a terminal block apparatus. (A) is a bottom view of the cover body of a terminal block apparatus, (b) is an AA arrow directional view in (a). It is a longitudinal cross-sectional view of the principal part of a terminal block apparatus. (A)-(c) is a top view which shows the connection example of the wiring by the side of the external connection with respect to a terminal block apparatus.

  Hereinafter, a terminal block device according to an embodiment of the present invention will be described with reference to the drawings. This embodiment is an example applied to a three-phase induction motor as an electric motor.

  The electric motor 10 shown in FIGS. 1 and 2 includes a motor main body 11 and a terminal block device 12 provided on the motor main body 11. The electric motor 10 of this embodiment is a three-phase induction motor. As shown in FIG. 3, the motor main body 11 includes a stator 13 and a rotor 14 that rotates inside the stator 13. The stator 13 includes a stator core 15 and a coil 16, and coil ends of the coil 16 are formed at both ends of the stator core 15. In FIG. 3, only one end coil end is shown, and the other end coil end is not shown. The rotor 14 includes a rotor core 17 and a rotation shaft 18 that is fixed through the center of the rotor core 17.

  As shown in FIGS. 1 and 2, a front cover 19 that covers one coil end is provided at one end of the stator 13, and a rear cover 20 that covers the coil end is provided at the other end. . The front cover 19 and the rear cover 20 are fixed to the stator 13 with through bolts 21. As shown in FIG. 3, the rotary shaft 18 of the rotor 14 is supported on the front cover 19 via a bearing 22, and the end of the rotary shaft 18 protrudes from the front cover 19 to the outside. An end portion of the rotating shaft 18 protruding from the front cover 19 is an output shaft portion. A rotating shaft 18 of the rotor 14 is supported on the rear cover 20 via a bearing (not shown).

  In the present embodiment, a plurality of wires 23 on the electric motor 10 side are drawn out from the coil end on the front cover 19 side. As shown in FIG. 2, the plurality of wirings 23 are three-phase wirings of a U-phase wiring 23U, a V-phase wiring 23V, and a W-phase wiring 23W, and correspond to the first wiring. The U-phase wiring 23U, the V-phase wiring 23V, and the W-phase wiring 23W are connected to the terminal block device 12. A round crimp terminal 24 is provided at each end of the plurality of wires 23. Specifically, a crimp terminal 24U is provided at the end of the U-phase wiring 23U, a crimp terminal 24V is provided at the end of the V-phase wiring 23V, and a crimp terminal 24W is provided at the end of the W-phase wiring 23W. Is provided. On the other hand, a plurality of wires 25 on the external connection side connected to an external device (for example, an inverter) are connected to the terminal block device 12. As shown in FIG. 1, the plurality of wirings 25 are three-phase wirings of a U-phase wiring 25U, a V-phase wiring 25V, and a W-phase wiring 25W, and correspond to a second wiring. The number of wirings 25 is the same as the number of wirings 23. A round crimp terminal 26 is provided at each end of the plurality of wires 25. Specifically, a crimp terminal 26U is provided at the end of the U-phase wiring 25U, a crimp terminal 26V is provided at the end of the V-phase wiring 25V, and a crimp terminal 26W is provided at the end of the W-phase wiring 25W. Is provided. Although not shown in FIG. 1, as shown in FIGS. 3, 6, and 7, U-phase wiring 25U, V-phase wiring 25V, and W-phase wiring 25W cover corresponding crimp terminals 26U, 26V, and 26W. A protective cap C is provided.

  Next, the terminal block device 12 that electrically connects the plurality of wirings 23 and the plurality of wirings 25 will be described. As shown in FIG. 1, the terminal block device 12 of the present embodiment is attached to the front cover 19 and the stator 13 so as to be positioned above the electric motor 10. As shown in FIG. 2, the terminal block device 12 includes a terminal block main body 27, a cover body 28, a bolt 29 as a shaft member, a cylindrical relay terminal 30, a nut 31 as a fastening member, and a snap ring as a retaining member. 32 and an O-ring 33 as a seal member. The terminal block device 12 of this embodiment includes a plurality of relay terminals 30, bolts 29, and nuts 31, and the number of relay terminals 30, bolts 29, and nuts 31 is the same as the number of wires 23, 25.

  The terminal block body 27 is formed in a flat plate shape by an insulating material (for example, polyamide resin). As shown in FIG. 4, a front end edge 34 that is located on the front cover 19 side in a state of being attached to the electric motor 10 is formed in the terminal block body 27 of the present embodiment. Further, the terminal block body 27 is formed with a pair of side end edges 35 and 36 respectively extending from both ends of the front end edge 34 in a direction orthogonal to the front end edge 34. One side edge 35 extends longer in the direction perpendicular to the front edge 34 than the other side edge 36. A rear end edge 37 connecting the side end edge 35 and the side end edge 36 is formed, and the rear end edge 37 is inclined by 45 ° with respect to the front end edge 34. The front end edge 34, the side end edges 35 and 36, and the rear end edge 37 form the outer peripheral edge of the terminal block body 27. In the vicinity of the outer peripheral edge of the terminal block main body 27, a joint portion 38 to be joined to the cover body 28 is formed (shown by hatching in FIG. 4).

  A rectangular opening 39 is formed at a position near the front end edge 34 of the terminal block body 27 and away from the rear end edge 37. Opening 39 is formed to pass U-phase wiring 23U, V-phase wiring 23V, and W-phase wiring 23W. A raised portion 40 having a raised surface is formed near the rear edge 37 and away from the front edge 34. Three raised portions 40 are formed along the rear edge 37. A hexagonal bottomed hole 41 is formed in the raised portion 40, and a part of the bolt 29 can be inserted into the bottomed hole 41. By inserting a part of the bolt 29 into the bottomed hole 41, the bolt 29 is held by the terminal block body 27. Rear end where each bottomed hole 41 is inclined by 45 ° with respect to the front end edge 34 in order to ensure the degree of freedom in the connecting direction of the U-phase wiring 25U, V-phase wiring 25V and W-phase wiring 25W to the terminal block device 12. Arranged along the edge 37. The terminal block body 27 includes a through hole 43 through which a bolt 42 for attaching the terminal block body 27 to the electric motor 10 is inserted. The through hole 43 is formed along the side edges 35 and 36 at the joint portion 38.

  The cover body 28 is formed of the same insulating material as the terminal block body 27. The outer peripheral edge of the cover body 28 corresponds to the shape of the terminal block main body 27. Specifically, as shown in FIG. 5A, a front end edge 45 corresponding to the front end edge 34 of the terminal block body 27 is formed on the cover body 28. A side edge 46 corresponding to the side edge 35 of the terminal base body 27 and a side edge 47 corresponding to the side edge 36 of the terminal base body 27 are formed on the cover body 28. Further, the cover body 28 is formed with a rear end edge 48 corresponding to the rear end edge 37 of the terminal block main body 27. In the vicinity of the outer peripheral edge of the cover body 28, a joint portion 49 to be joined to the joint portion 38 of the terminal base body 27 is formed (shown by hatching in FIG. 5A). The cover body 28 is formed with a peripheral wall portion 50 that rises from the joint portion 49 and a ceiling wall portion 51 that is higher than the joint portion 49 inside the peripheral wall portion 50 so that a space is formed inside the joint portion 49. Has been. Through holes 52 and 53 through which the bolts 42 are inserted are formed in the joint portion 49.

  As shown in FIG. 5B, in a state where the joint portion 49 of the cover body 28 and the joint portion 38 of the terminal block body 27 are joined to each other, there is a U-phase between the terminal block body 27 and the cover body 28. A space A in which the wiring 23U, the V-phase wiring 23V, and the W-phase wiring 23W can be arranged is formed. Further, the inner wall surface of the top wall portion 51 of the cover body 28 faces the terminal block main body 27. In the terminal block body 27, the surface on the cover body 28 side excluding the joint portion 38 and the opening 39 corresponds to a facing surface that faces the inner wall surface of the top wall portion 51.

  A through hole 54 is formed at a position near the rear end edge 48 of the cover body 28 and away from the front end edge 45. The through hole 54 is a circular hole through which the relay terminal 30 is inserted. In a state where the cover body 28 is joined so as to be on the upper side of the terminal block main body 27, the center of the through hole 54 coincides with the center of the bottomed hole 41 of the terminal block main body 27. The axis is in the vertical direction. Three through holes 54 are formed corresponding to the number of the bottomed holes 41. A thick portion 55 is formed around the through hole 54 so as to protrude in a cylindrical shape from the outer wall surface of the top wall portion 51. The thick portion 55 is formed with an annular top surface 56 orthogonal to the direction of penetration of the through hole 54.

  A plate-like insulating partition part 57 is formed on the inner wall surface of the top wall part 51 of the cover body 28. The insulating partition 57 is formed at two locations so that the space A is divided into three. The longitudinal direction of the insulating partition 57 is a direction orthogonal to the front edge 45. The end of the insulating partition 57 on the rear edge 48 side reaches the joint 49 so as to be positioned between the adjacent through holes 54. The end of the insulating partition 57 on the side of the front edge 45 does not reach the joint 49. Insulation partition 57 ensures insulation between adjacent wires in space A (between U-phase wire 23U and V-phase wire 23V, and between V-phase wire 23V and W-phase wire 23W).

  Next, the bolt 29 as a shaft member will be described. As shown in FIG. 6, the bolt 29 includes a shaft portion 59 having a male screw and a head 60 connected to an end portion of the shaft portion 59. It is. Since the head portion 60 of the bolt 29 is a hexagonal column, it does not rotate around the axis of the shaft portion 59 when the head portion 60 is inserted into the bottomed hole 41 of the terminal block body 27. Therefore, the bottomed hole 41 functions as a detent mechanism. In a state where the cover body 28 and the terminal block main body 27 are joined to each other and the bolt 29 is held on the terminal block main body 27, the shaft portion 59 has a front end sufficiently protruding from the through hole 54 to the outside. The length is set. The nut 31 as a fastening member is a known nut having a screw hole that allows the shaft portion 59 of the bolt 29 to be screwed therein.

  Next, the relay terminal 30 will be described. The relay terminal 30 is formed in a cylindrical shape with copper having excellent conductivity. The relay terminal 30 is a conductive member and is used to indirectly connect the wiring 23 on the electric motor 10 side and the wiring 25 on the external side. The relay terminal 30 includes a cylindrical main body 61, and an insertion hole 62 is formed at the center of the main body 61. The insertion hole 62 is formed with a female screw corresponding to the male screw of the shaft portion 59 of the bolt 29. Accordingly, the shaft portion 59 of the bolt 29 is inserted into the insertion hole 62 by screwing. A flange portion 63 having an outer peripheral diameter that is larger than the outer peripheral diameter of the main body portion 61 is formed at one end of the main body portion 61. Therefore, even if the relay terminal 30 is inserted into the through hole 54 of the cover body 28, the flange portion 63 hits the cover body 28 and the relay terminal 30 does not pass through the through hole 54.

  In the present embodiment, the end surface 64 on the flange portion 63 side of the relay terminal 30 corresponds to a first seat surface that contacts the crimp terminal 24 of the wiring 23 on the electric motor 10 side. The end surface 65 on the opposite side of the flange terminal 63 side of the relay terminal 30 corresponds to a second seat surface that contacts the crimp terminal 26 of the wiring 25 on the external connection side.

  An annular groove 66 for attaching the snap ring 32 and an annular groove 67 for attaching the O-ring 33 are formed on the outer peripheral surface of the relay terminal 30 in the circumferential direction. The annular groove 66 in which the snap ring 32 is mounted is formed at a position close to the end surface 65 on the outer peripheral surface. The annular groove 67 to which the O-ring 33 is attached is formed at a position closer to the end face 64 than the annular groove 66.

  When the relay terminal 30 is inserted into the through hole 54 from the inner wall surface side of the top wall portion 51 and the snap ring 32 is attached to the annular groove 66 with the annular groove 66 protruding to the outer wall surface side of the top wall portion 51, the snap The ring 32 is locked to the top surface 56 of the thick portion 55. Accordingly, the relay terminal 30 is prevented from dropping from the through hole 54, and the relay terminal 30 is held by the cover body 28. The snap ring 32 of this embodiment is a known C-type snap ring.

  The O-ring 33 is a known O-ring formed of a rubber-based material as a sealing member for preventing water from entering the space A through the through hole 54, and has a cross-sectional diameter that is larger than the groove depth of the annular groove 67. It is set large. The O-ring 33 is attached to the annular groove 67 before the relay terminal 30 is inserted into the through hole 54. When the relay terminal 30 to which the O-ring 33 is attached is inserted into the through-hole 54, the O-ring 33 is elastically deformed by the hole wall of the cover body 28 forming the through-hole 54, and the through-hole 54 is sealed, and the space portion Infiltration of water through the through hole 54 to A is prevented.

  Next, connection of the plurality of wirings 23 and 25 in the terminal block device 12 of the present embodiment will be described. An O-ring 33 may be attached to the relay terminal 30 before the plurality of wirings 23 and 25 are connected. First, connection between the terminal block device 12 and the U-phase wiring 23U, V-phase wiring 23V, and W-phase wiring 23W on the electric motor 10 side will be described. The crimping terminals 24U, 24V, and 24U are engaged with the shaft portion 59 of the bolt 29, and the head portion 60 of the bolt 29 is inserted into the bottomed hole 41 of the terminal base body 27 fixed to the electric motor 10 in advance (FIG. 2). FIG. 3 and FIG. 6). The bottomed hole 41 is formed following the shape of the hexagonal column head 60, and the bolt 29 held in the bottomed hole 41 is not rotated with respect to the terminal block body 27.

  Next, the relay terminals 30 fitted with the O-ring 33 are screwed into the respective bolts 29, and the end surfaces 64 of the relay terminals 30 are brought into contact with the crimp terminals 24U, 24V, 24U. As shown in FIG. 6, when the end surface 64 of the relay terminal 30 is in contact with the crimp terminals 24U, 24V, 24U, the tip of the shaft portion 59 of the bolt 29 is sufficiently outside the end surface 65 of the relay terminal 30. It is in a protruding state.

  Next, the cover body 28 is fixed to the terminal block main body 27 by using mounting bolts 42. When the cover body 28 is fixed to the terminal base body 27, each relay terminal 30 is inserted through the corresponding through hole 54. The snap ring 32 is mounted in the annular groove 66 of the relay terminal 30 in a state of protruding from the through hole 54 of the relay terminal 30. When the snap ring 32 is attached to the relay terminal 30, the relay terminal 30 is held by the cover body 28, and the gap between the hole wall in the through hole 54 and the relay terminal 30 is sealed by the O-ring 33. Further, when the cover body 28 is fixed to the terminal block body 27, a space portion A isolated from the outside is formed between the lower terminal block body 27 and the upper cover body 28. In space A, U-phase wiring 23U, V-phase wiring 23V and W-phase wiring 23W are fixed to terminal block device 12. Insulation partition portion 57 ensures insulation between adjacent wires in space A (between U-phase wire 23U and V-phase wire 23V, and between V-phase wire 23V and W-phase wire 23W).

  Next, as shown in FIG. 6, the U-phase wiring 25U, the V-phase wiring 25V, and the W-phase wiring 25W on the external connection side are connected to the terminal block device 12. The crimp terminals 26U, 26V, and 26U are engaged with the shaft portions 59 of the bolts 29 protruding from the corresponding relay terminals 30, and the nuts 31 are screwed into the bolts 29 and tightened. By crimping the nut 31, the crimp terminals 26 </ b> U, 26 </ b> V, 26 </ b> U are brought into contact with the end surface 65 of the relay terminal 30 outside the cover body 28. By tightening the nut 31, the crimp terminals 24U, 24V, 24U and the crimp terminals 26U, 26V, 26U receive axial force and are pressed against the relay terminal 30 and are indirectly connected via the relay terminal 30. In the present embodiment, the terminal block main body 27 and the cover body 28 are not subjected to the axial force due to the tightening of the nut 31, and the creep phenomenon does not occur. Note that the head 60 of the bolt 29 may be separated from the bottom surface of the bottomed hole 41 by tightening the nut 31. Even if the head 60 of the bolt 29 is separated from the bottom surface of the bottomed hole 41, the bolt 29 is not rotated with respect to the terminal block main body 27, and the bolt 29 is held by the terminal block main body 27.

  By the way, in this embodiment, as shown in FIG. 1, the U-phase wiring 25U, the V-phase wiring 25V and W are arranged in the same direction as the connection direction of the U-phase wiring 23U, the V-phase wiring 23V and the W-phase wiring 23W. A phase wiring 25 </ b> W is connected from the rear cover 20 side toward the terminal block device 12. The connection directions of the U-phase wiring 25U, the V-phase wiring 25V, and the W-phase wiring 25W may be as shown in FIGS. 7 (a) to 7 (c). The connection direction of the U-phase wiring 25U, V-phase wiring 25V and W-phase wiring 25W on the external connection side to the terminal block device 12 is not restricted by the structure of the terminal block device 12, and the degree of freedom of the connection direction is sufficient. Big. FIG. 7A shows that the U-phase wiring 25U, the V-phase wiring 25V, and the W-phase wiring 25W are connected to the stator 13 so as to be orthogonal to the connection direction of the U-phase wiring 23U, the V-phase wiring 23V, and the W-phase wiring 23W. It is an example connected toward the terminal block apparatus 12 from the side. FIG. 7B shows the U-phase wiring 25U, the V-phase wiring 25V, and the W-phase wiring 25W so as to have an angle of 45 ° with respect to the connection direction of the U-phase wiring 23U, the V-phase wiring 23V, and the W-phase wiring 23W. Is an example of being connected toward the terminal block device 12. FIG. 7C shows that the U-phase wiring 25U and the V-phase wiring are connected from the rear cover 20 side to the terminal block device 12 so as to be in the same direction as the connection direction of the U-phase wiring 23U, the V-phase wiring 23V, and the W-phase wiring 23W. Connected towards. W-phase wiring 25W is connected from the side of stator 13 toward terminal block device 12 so as to be in a direction orthogonal to the connection direction of U-phase wiring 23U, V-phase wiring 23V and W-phase wiring 23W.

The terminal block device 12 of this embodiment has the following effects.
(1) The crimp terminal 24 of the wiring 23 is brought into contact with the end face 64 of the relay terminal 30 between the terminal base body 27 and the cover body 28 and is locked to the bolt 29. Further, the crimp terminal 26 of the wiring 25 abuts on the end face 65 of the relay terminal 30 outside the cover body 28 and is locked to the bolt 29. For this reason, the wiring 23 and the wiring 25 are indirectly connected via the relay terminal 30. For this reason, even if an axial force is applied in the axial direction of the bolt 29, no axial force is applied to the terminal block main body 27 and the cover body 28, and a creep phenomenon does not occur.

(2) The crimp terminal 26 of the wiring 25 is connected to the relay terminal 30 outside the cover body 28. For this reason, the connection direction of the wiring 25 is not restricted by the structure of the terminal block device 12, and the degree of freedom of the connection direction of the wiring 25 can be sufficiently increased. For example, the connection direction of the U-phase wiring 25U, the V-phase wiring 25V, and the W-phase wiring 25W can be different for each of the U-phase wiring 25U, the V-phase wiring 25V, and the W-phase wiring 25W.

(3) The insulating partition 57 can insulate the U-phase wiring 23U, the V-phase wiring 23V, and the W-phase wiring 23W on the electric motor 10 side in the space A from each other. Further, the insulating partition 57 does not impair the degree of freedom in the connection direction of the U-phase wiring 25U, V-phase wiring 25V, and W-phase wiring 25W on the external connection side. Furthermore, the insulating partition 57 can increase the rigidity of the cover body 28.

(4) The snap ring 32 can hold the relay terminal 30 on the cover body 28 without dropping from the through hole 54. By using the snap ring 32, the relay terminal 30 can be easily held by the cover body 28, and the relay terminal 30 can be easily detached from the cover body 28.

(5) The O-ring 33 attached to the relay terminal 30 seals the gap between the hole wall in the through hole 54 and the relay terminal 30, and allows water to enter the space A through the through hole 54 of the cover body 28. Can be prevented. Further, since the U-phase wiring 25U, V-phase wiring 25V and W-phase wiring 25W on the external connection side are provided with the protective cap C, water enters the crimp terminals 26U, 26V, 26W and the end face 65 of the relay terminal 30. Can be prevented.

(6) The bolt 29 is inserted into the bottomed hole 41 provided in the terminal block main body 27, but is held by the relay terminal 30, so that it can be easily attached to and detached from the terminal block main body 27. Further, it is not necessary to cast the bolt 29 into the resin member as in the prior art, and the manufacturing process can be shortened as compared with the case where the shaft member is cast into the resin member.

  The present invention is not limited to the above-described embodiment, and various modifications are possible within the scope of the gist of the invention. For example, the following modifications may be made.

In the above embodiment, the insulating partition for insulating the wiring on the electric motor side is provided in the cover body, but this is not restrictive. For example, you may make it provide an insulation partition part in a terminal block main body. Also in this case, the U-phase wiring, V-phase wiring, and W-phase wiring on the electric motor side in the space can be insulated from each other. Further, the rigidity of the terminal block body can be increased. Moreover, you may make it provide an insulation partition part in a terminal block main body and a cover body, respectively.
In the above embodiment, the connection example of the second wiring is shown in FIGS. 7A to 7C, but the connection example of the second wiring is not limited to this. For example, the second wiring may be connected to the terminal block device from any direction as long as the U-phase wiring, V-phase wiring, and W-phase wiring do not intersect. That is, the entire circumference of the shaft center of the shaft member is established as the wiring connection direction.
In the above embodiment, the insertion hole of the relay terminal is a screw hole corresponding to the male screw of the bolt, which is a shaft member. However, the present invention is not limited to this. For example, the insertion hole may be a through hole that is not a screw hole. Moreover, a male screw may be formed in a part of the shaft portion so that the nut can be fastened also to the shaft portion of the bolt.
In the above embodiment, a known hexagon bolt is used as the shaft member. However, the shaft member is not limited to this, and the shaft member can lock the wiring and fasten the fastening member, and does not rotate around the shaft with respect to the cover body. If it is a structure provided with a detent, there is no structural restriction.
In the above embodiment, the number of the first wiring and the second wiring is three corresponding to the three phases. However, the number of the first wiring and the second wiring applied to the terminal block device is not limited to three. For example, it may be two or four.
In the above embodiment, the relay terminal is held on the cover body by the retaining member, but this is not restrictive. The retaining member is not an essential requirement. For example, the relay terminal may not be held by the cover body by fastening the fastening member to the shaft member locked by the first wiring and the second wiring. In this case, the terminal of the second wiring is prevented from coming out from the cover body of the relay terminal.
In the above embodiment, the snap ring is used as the retaining member, but the retaining member is not limited to the snap ring. The retaining member only needs to have a function of preventing the relay terminal from coming out from the insertion hole of the cover body, and the structure and shape of the retaining member are not particularly limited.
In the above embodiment, the O-ring is used as the sealing member. However, the sealing member is not limited to the O-ring, and any type can be used as long as it has a function of preventing water from entering the space portion of the terminal block device. Absent.
In the above embodiment, the O-ring is attached to the relay terminal. However, the O-ring is not an essential configuration. For example, if there is no risk of water entering the space in the terminal block device, an O-ring is not required. When the O-ring is not required, the number of parts of the terminal block device can be reduced.
In the above embodiment, the three-phase induction motor is exemplified as the electric motor, but the type of the electric motor is not limited. As the electric motor, for example, a synchronous electric motor (generator) may be used. Moreover, you may apply a terminal block apparatus to electric power apparatuses other than an electric motor.

DESCRIPTION OF SYMBOLS 10 Electric motor 11 Motor main body 12 Terminal block apparatus 13 Stator 14 Rotor 18 Rotating shaft 23 Wiring (1st wiring)
23U U-phase wiring 23V V-phase wiring 23W W-phase wiring 25 wiring (second wiring)
25U U-phase wiring 25V V-phase wiring 25W W-phase wiring 27 Terminal block body 28 Cover body 29 Bolt (shaft member)
30 Relay terminal 31 Nut (fastening member)
32 Snap ring (prevention member)
33 O-ring 41 Bottomed hole 54 Through-hole 57 Insulating partition 62 Insertion hole 64 End surface (first seat surface)
65 End face (second bearing surface)
66 Annular groove (snap ring)
67 Annular groove (O-ring)
A Space part P Axis center

Claims (4)

A terminal block device in which the first wiring and the second wiring are electrically connected,
A terminal block body formed of an insulating material;
A cover body formed of an insulating material and covering the terminal block body;
A shaft member that is held by the terminal block main body and on which the terminal of the first wiring and the terminal of the second wiring are locked;
A cylindrical relay terminal through which the shaft member is inserted and penetrates the cover body;
A fastening member mounted on the shaft member and fixing the terminal of the first wiring and the terminal of the second wiring to the relay terminal;
The relay terminal is
A first seat surface that contacts the terminal of the first wiring between the terminal block body and the cover body;
A terminal block device comprising: a second seat surface in contact with a terminal of the second wiring outside the cover body. The first wiring and the second wiring are plural,
The cover body includes an inner wall surface facing the terminal block body,
The terminal block body includes a facing surface facing the inner wall surface,
2. The terminal block device according to claim 1, wherein an insulating partition that partitions each of the plurality of first wires is provided on at least one of the inner wall surface and the facing surface. A through hole through which the relay terminal is inserted is formed in the cover body,
The terminal block device according to claim 1, wherein a retaining member that prevents the relay terminal from dropping from the through hole is provided on the relay terminal. An annular seal member is attached to the outer peripheral surface of the relay terminal,
The terminal block device according to claim 3, wherein the seal member provides a seal between the relay terminal and the cover body in the through hole.

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