JP6024985B2 - Terminal block - Google Patents

Description

  The present invention relates to a terminal block.

  Conventionally, what was described in following patent document 1 is known as a terminal block which electrically connects the electrically-conductive members provided in electric equipments, such as a motor and an inverter. This is provided with a synthetic resin housing that is inserted through a case of a predetermined device inside and outside, and a plurality of terminals provided with connecting portions provided with nuts at both ends of an L-shaped bus bar. Each terminal has a structure in which a connection portion at one end faces the outer end portion of the housing and a connection portion at the other end faces the inner end portion of the housing.

  An outer conductive member made of a bus bar extended from an electric device such as an inverter is connected to a connection portion outside the terminal mounted on the terminal block by bolting and extended from the electric device such as a motor. The inner conductive member made of a bus bar is connected to the inner connecting portion of the terminal by bolting, and electrical continuity between the corresponding inner and outer conductive members is taken.

JP 2010-211193 A

In the above-described conventional terminal block, in particular, when the inner conductive member is bolted and connected to the connecting portion inside the corresponding terminal, a work space for inserting a bolting tool inside the device is required. However, there was a problem that it was difficult to work because it was a bolting work inside the equipment, and the improvement was eagerly desired.
The present invention has been completed based on the above circumstances, and its object is to provide a terminal block that can save space and improve the connection workability between the conductive member and the terminal. is there.

The present invention is a terminal block for connecting an inner conductive member and an outer conductive member arranged inside and outside a device, a housing provided by penetrating the case of the device inside and outside, and a housing mounted on the inside and outside of the housing. a terminal connecting portions are provided each of the inner conductive member and the outer conductive member to the end portion, it is provided, and the connecting portion of the inner end side in the terminal, pin terminals provided on the inner conductive members Terminal insertion opening into which the pin terminal can be inserted into the outer surface of the housing, while the socket terminal is accommodated in the inner end of the housing. Is provided in a form communicating with the socket terminal, and a tapered lead-in portion is formed at an edge of the terminal insertion port, and the housing is connected to the socket terminal in the terminal. A housing body molded in a form in which the terminal is opened, and a cover that is mounted so as to cover the socket terminal with respect to the opening of the housing body, and the terminal insertion port extends across the housing body and the cover. It is characterized in that is formed .

  According to this configuration, when the inner conductive member is connected to the connection portion on the inner end side of the terminal, the pin terminal is fitted to the mating socket terminal. Compared with the case of connecting by bolt tightening, it is sufficient to fit the pin terminal to the socket terminal. Therefore, the connection work itself is simplified, and the work space for bolt tightening can be eliminated, thereby saving space. it can.

In this configuration, the pin terminal is fitted to the corresponding socket terminal through the terminal insertion port, and even if there is a misalignment, the pin terminal fits smoothly while being aligned with the lead-in part Is done. Connection work between the pin terminal and the socket terminal becomes easier.

In this configuration, the housing is formed by attaching the cover to the housing body, and the socket terminal is accommodated on the inner end side of the housing.
The following configuration may also be used.

A flexible vibration absorbing portion is provided between the inner and outer connecting portions of the terminal.
In this configuration, when vibration acts on the inner conductive member or the outer conductive member, the vibration is absorbed by the vibration absorbing portion, and the vibration is suppressed from reaching the opposite conductive member side.

  According to the terminal block of the present invention, it is possible to save space and improve the connection workability between the conductive member and the terminal.

1 is an external perspective view of a terminal block according to Embodiment 1 of the present invention. Front view Side view Same part cutaway perspective view VV sectional view of FIG. Longitudinal sectional view when molding the housing body The longitudinal cross-sectional view of the terminal block which concerns on Embodiment 2.

<Embodiment 1>
A first embodiment of the present invention will be described with reference to FIGS.
In this embodiment, a terminal block T that electrically connects a three-pole conductive member provided in a three-phase AC motor mounted on a vehicle such as an electric vehicle or a hybrid vehicle and a three-pole conductive member provided in an inverter. And is applied to a direct connection type of a motor and an inverter.

More specifically, as shown in FIG. 5, the terminal block T is provided on the upper wall 2 of the transmission case 1, and a motor-side case (not shown) is provided on the front opening side (left side of the figure) of the transmission case 1. While being assembled adjacent to each other, an inverter side case is further assembled on the upper surface of the integrally connected transmission case 1 and motor side case. The three-pole conductive member (inner conductive member) extending from the motor and the conductive member (outer conductive member) extending from the inverter are electrically connected via the terminal block T as described above. It has become.
In this embodiment, the outer conductive member extending from the inverter is a bus bar, while the inner conductive member extending from the motor is an enameled wire that is straightened with an adhesive or the like, As shown in FIG. 5, a round pin terminal p is coaxially connected to the tip of the member.

The structure of the terminal block T will be described in detail. As shown in FIG. 1, the terminal block T includes three terminals 10 shown in the figure, and a synthetic resin housing 30 in which these terminals 10 are mounted in parallel.
As shown in FIG. 6, the terminal 10 is formed of a bus bar bent in an L shape, and one end side is an outer connection portion 11 connected to an outer conductive member, and a bolt insertion hole 12 is opened. Yes. As will be described later, the terminal 10 is attached to the housing 30 in a posture in which the outer connecting portion 11 is in a horizontal posture and the other end is suspended, and is attached to the other end which is a suspended lower end. Is provided with a socket terminal 20 that functions as an inner connecting portion connected to the inner conductive member.

The socket terminal 20 has a two-piece structure in which a cylindrical body 25 is fitted on the outer periphery of the louver terminal portion 21. The louver terminal portion 21 has a ring-shaped base portion 22 having a plurality of elastic contact pieces 23 having a contact portion 23A on the front end side and extending forward at the front edge of the ring-shaped base portion 22 and spaced in the circumferential direction. It is an arranged shape.
An inward flange 26 is formed at the front end of the cylindrical body 25 to protect the tip of the elastic contact piece 23 of the louver terminal portion 21. The cylindrical body 25 is fitted to the outer periphery of the louver terminal portion 21 from the front, and is attached while being prevented from coming off by, for example, folding a pair of coupling pieces 27 protruding from the rear edge with respect to the base portion 22.

From the upper edge of the base portion 22 of the louver terminal portion 21, a strip-like connecting piece 24 is integrally formed and the upper end portion of the connecting piece 24 is applied to the hanging end of the terminal 10 by spot welding or the like. It is fixed. As a result, the socket terminal 20 takes a posture in which the axis thereof faces in the same direction as the bending direction of the outer connecting portion 11 of the terminal 10 (left side in FIG. 6). In the middle of the connecting piece 24 in the height direction, it is bent into a crank shape for reinforcement or the like.
A total of three such terminals 10 are provided.

The housing 30 further includes a housing main body 31 and a cover 50.
As shown in FIGS. 1 and 6, the housing body 31 is formed in a box shape having a bottom opening that is elongated in the left-right direction. A horizontally long flange 32 is formed on the upper edge of the housing body 31. Is provided with a mounting hole 33 in which a collar 34 is fitted. A packing mounting groove 35 is provided around the lower surface of the flange 32 so that a ring-shaped surface packing 36 is mounted.

  A pedestal block 40 on which the outer connection portions 11 of the terminals 10 described above are mounted side by side is provided at the center of the upper surface of the housing body 31. The pedestal block 40 is formed with three pedestals 41 on which the outer connecting portions 11 are individually placed. Each pedestal 41 is recessed from the placement surface, and the accommodation chamber 43 of the nut 42 is provided on the front surface. An opening is formed. Each accommodation chamber 43 is configured to receive a nut 42 that is prevented from rotating.

First, the manufacturing procedure of the housing body 31 will be described with reference to FIG. First, the pedestal block 40 is formed by primary molding over the three terminals 10 arranged at a predetermined pitch (including the connection portion with each connecting piece 24), and the three terminals 10 are placed on the pedestal block 40 in a predetermined posture. It becomes the form held by.
Next, the housing body 31 is formed by performing secondary molding with the pedestal block 40 and the three terminals 10 as cores. At this time, each socket terminal 20 takes a form in which the lower half protrudes downward from the lower edge of the front wall 31 </ b> A immediately behind the front wall 31 </ b> A of the housing body 31. The form which stood up the near side of back wall 31B is taken.
A collar 34 is also attached.

  The cover 50 is formed separately from the housing main body 31 and has a square deep dish shape so as to cover the lower surface opening of the housing main body 31 described above. As shown in FIG. 3, an elastically displaceable lock frame 51 is formed on the left and right side surfaces of the cover 50, while lock projections 38 are provided on the left and right side surfaces of the housing body 31. When the cover 50 is properly attached to the lower surface opening of the housing body 31, the lock frame 51 is elastically fitted to the lock projection 38, so that the housing 30 is integrally joined with the housing body 31 and the cover 50. Is to be formed.

As shown in FIGS. 1 and 5, three round pin terminals p can be inserted on the joint between the lower edge of the housing body 31 and the upper edge of the cover 50 on the front surface of the housing 30. The terminal insertion openings 45 are opened at the same pitch as the arrangement pitch of the terminals 10 (socket terminals 20). Each terminal insertion port 45 is positioned coaxially with the corresponding socket terminal 20, and a leading portion 46 that forms a front-expanding tapered shape is formed at the front end portion of each terminal insertion port 45.
As described above, since the housing body 31 and the cover 50 are assembled together later, the upper half of each terminal insertion port 45 is located at the lower edge of the front wall 31A of the housing body 31 and the lower half of each terminal insertion port 45. Are formed in advance on the upper edge of the front wall 50A of the cover 50, respectively.

Then, an example of the assembly procedure of the terminal block T according to the present embodiment and a usage example of the terminal block T will be described.
As described above, the housing main body 31 integrally including the three terminals 10 is formed by two moldings as shown in FIG. The outer connection portion 11 of each terminal 10 is placed on the corresponding base 41 directly above the accommodation chamber 43 of the nut 42 in a posture facing frontward. Also, the socket terminal 20 which is the inner connection portion of each terminal 10 is also in a posture facing forward, with the terminal insertion port 45 immediately behind the terminal insertion port 45 (more precisely, the upper half of the terminal insertion port 45). Located on the same axis.

  Next, the cover 50 is attached to the lower surface opening of the housing body 31 integrally provided with the three terminals 10 as described above. The cover 50 is pushed up from below while the lock frame 51 rides on the lock projection 38 and is elastically displaced. When the upper edge of the cover 50 hits the lower edge of the housing body 31, the lock frame 51 returns to its original shape. However, the housing 30 is formed as shown in FIG.

At this time, the socket terminal 20 that is the inner connection portion of each terminal 10 is housed in the lower end portion of the housing 30, and the terminal insertion port 45 is concentrically opened immediately before the socket terminal 20. .
A nut 42 is inserted into the housing chamber 43 of each base 41 with respect to such a housing 30, and a surface packing 36 is mounted in the packing mounting groove 35 on the lower surface of the flange 32, thereby completing the terminal block T.

  The terminal block T assembled as described above is attached to the upper wall 2 of the mission case 1 as shown in FIG. Specifically, the lower end portion of the housing 30 is inserted from above into the through-hole 3 opened in the case upper wall 2, and then a bolt is inserted into the mounting hole 33 of the flange 32 so that the case upper wall 2. The flange 32, that is, the terminal block T is fixed to the case upper wall 2 by being screwed into the bolt hole. At the same time, the surface packing 36 is elastically compressed and pressed against the hole edge of the through hole 3, whereby the through hole 3 is sealed.

  When the terminal block T is attached in this way, the outer connection portion 11 of each terminal 10 is exposed on the upper surface side (outer side) of the case upper wall 2 in a form arranged on the upper surface of the housing 30 (pedestal block 40). It will be in the state where it faced. On the other hand, the socket terminal 20 which is an inner connection portion of each terminal 10 protrudes to the lower surface side (inner side) of the case upper wall 2 in a form accommodated in the lower end portion of the housing 30, but is a terminal formed on the front surface of the housing 30. It will be in the state opened to the front (left side of FIG. 5) through the insertion port 45. FIG.

Next, a procedure for connecting the three-pole conductive member of the three-phase AC motor and the three-pole conductive member of the inverter using the terminal block T will be described.
First, a three-pole inner conductive member (enameled wire) on the motor side is connected to the inner connecting portion of the corresponding terminal 10, and a round pin terminal p provided at the tip of the enameled wire is connected to the arrow in FIG. As shown in FIG. 4, the socket 30 is inserted into the socket terminal 20 on the back side through the terminal insertion opening 45 opened on the front surface of the housing 30. At this time, even if the round pin terminal p is misaligned with respect to the socket terminal 20, the round pin terminal p is inserted while being aligned with the guiding portion 46. The round pin terminal p is pushed in while expanding and displacing the elastic contact piece 23 of the louver terminal portion 21, and when the push is stopped, the elastic contact piece 23 moves back in the diameter reducing direction so that the round pin terminal p The socket terminals 20 are elastically fitted and contacted with each other, and the three-pole inner conductive member (enameled wire) on the motor side is connected to the inner connection portion (socket terminal 20) of the corresponding terminal 10.
After that, the motor side case is assembled adjacently so as to cover the front opening of the transmission case 1.

Subsequently, the three-side outer conductive member (bus bar) on the inverter side is connected to the outer connection portion 11 of the corresponding terminal 10. Although not shown, each bus bar is overlapped on the outer connection portion 11 arranged side by side on the upper surface of the housing 30, and a bolt is passed through the insertion hole 12 of the bus bar and the insertion hole 12 of the outer connection portion 11 to enter the accommodation chamber 43. By screwing and tightening the nuts 42 that are prevented from rotating and tightened, the three-side outer conductive members (bus bars) on the inverter side are connected to the outer connection portions 11 of the corresponding terminals 10.
After that, the inverter side case is assembled to the upper surfaces of the transmission case 1 and the motor side case that are integrally coupled as described above.
As described above, the three-pole conductive member provided in the three-phase AC motor and the three-pole conductive member provided in the inverter are electrically connected via the terminal block T, and the motor and the inverter are directly connected. The terminal connection structure is constructed.

In the present embodiment, a round pin terminal p is provided on the inner conductive member with respect to the inner connecting portion of the terminal 10 mounted on the terminal block T, and the terminal 10 The inner connection portion is configured by the socket terminal 20. Therefore, when the inner conductive member is connected to the inner end connection portion of the terminal 10, it is achieved by fitting the round pin terminal p to the mating socket terminal 20.
For example, compared with the case of connecting by bolting, it is sufficient to fit the round pin terminal p into the socket terminal 20, so that the connection work itself is simplified. Further, since a work space for bolt tightening can be made unnecessary, space saving is achieved, and for example, a motor case can be downsized.

  In this embodiment, the round pin terminal p provided at the tip of the inner conductive member of the motor passes through the terminal insertion opening 45 opened in the front surface of the housing 30 with respect to the socket terminal 20 accommodated in the housing 30. Although it is a structure to be inserted, there is a possibility that the inner conductive member of the motor is shaken because it is made of a hardened enameled wire, so the round pin terminal p and the mating socket terminal 20 are misaligned. There is concern. However, since the tapered lead-in portion 46 is formed on the inlet side of the terminal insertion port 45, even if the round pin terminal p is misaligned with respect to the socket terminal 20, the round pin terminal p is drawn. The core 46 is inserted while being aligned with the portion 46, and is smoothly fitted to the socket terminal 20. Connection work of the round pin terminal p and the socket terminal 20 becomes easier.

  The housing 30 includes a housing main body 31 molded in a form in which the socket terminal 20 side of the terminal 10 is opened, and a cover 50 attached to the opening of the housing main body 31 so as to cover the socket terminal 20. Yes. In particular, since the housing body 31 is molded, a seal between the housing 30 and the terminal 10 can be taken naturally.

<Embodiment 2>
A second embodiment of the present invention will be described with reference to FIG. The second embodiment is different from the first embodiment in that a vibration absorbing portion is provided between the inner and outer connecting portions of the terminal 60 mounted on the terminal block T1.
Hereinafter, differences from the first embodiment will be mainly described, and members and parts having the same functions as those of the first embodiment will be denoted by the same reference numerals, and description thereof will be simplified or omitted.

  The terminal 60 has a structure in which a flexible conductor 62 serving as a vibration absorbing portion is connected to a drooping lower end of a bus bar 61 that is bent in an L shape. The flexible conductor 62 has a structure in which a braided wire is bent into a substantially S shape. On the other hand, in the socket terminal 20A serving as the inner connection portion, the connecting piece 24A raised from the base portion 22 of the louver terminal portion 21 is fastened to a short one.

  Specifically, the L-shaped bus bar 61 constituting the terminal 60 is reversed in the front-rear direction from the first embodiment, and the upper end portion of the flexible conductor 62 is applied to the rear surface of the lower end portion of the bus bar 61. While being fixed by spot welding or the like, the lower end portion of the flexible conductor 62 is applied to the front surface of the upper end portion of the connecting piece 24A raised from the base portion 22 of the louver terminal portion 21 and is similarly fixed by spot welding or the like. Yes. In the terminal 60 of the second embodiment, the bending direction of the outer connecting portion 11 and the socket terminal 20A are directed in the front-rear reverse direction.

Similarly, the housing 30 includes a housing main body 31 and a cover 50. The housing main body 31 is formed in a form in which three terminals 60 are integrally provided by two moldings. The cover 50 is attached to the housing 30 to form the terminal block T1.
At this time, the flexible conductor 62 having a substantially S-shape that constitutes a part of the terminal 60 is accommodated in the most area on the upper side in the housing 30, and the socket terminal 20 </ b> A that is an inner connection portion of the terminal 60 is provided in the housing 30. The terminal insertion port 45 is concentrically opened immediately before the socket terminal 20A.

  Such a terminal block T1 is similarly attached to the transmission case upper wall 2, and thereafter, as in the first embodiment, the motor-side three-pole inner conductive member (enameled wire) is connected to the inner side of the terminal 60. When connecting to the terminal, the pin terminal 60 provided at the tip of the enameled wire is inserted into the socket terminal 20A which is the inner connection part, and the three-pole outer conductive member (bus bar) on the inverter side is made to correspond. In connecting with the outer connection part 11 of the terminal 60, it connects by bolting. In addition, the motor and the inverter are directly connected.

According to the second embodiment, as in the first embodiment, improvement in workability when the inner conductive member on the motor side is connected to the inner connection portion of the terminal 60 mounted on the terminal block T1, and the saving is saved. Space can be achieved.
In addition, since the flexible conductor 62 which is a vibration absorbing portion is provided for the terminal 60 provided in the terminal block T1, when vibration acts on the inner conductive member or the outer conductive member, the same vibration is generated in the flexible conductor 62. Absorption is suppressed, and vibrations on the opposite conductive member side are suppressed.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) In the above-described embodiment, the case where the round pin terminal is provided at the tip of the inner conductive member is illustrated, but it may be a pin terminal having an irregular cross section other than a perfect circle. The socket terminal which is the inner connection portion may be a cylindrical socket terminal having a cross-sectional shape into which the pin terminal is closely fitted.
(2) In the above embodiment, the terminal insertion opening that opens in the housing is provided separately for the housing main body and the cover, but may be provided for either one as a reference example .
(3) In the above embodiment, the terminal is structured to be integrally attached to the housing body as the housing body is molded. As a reference example , the terminal is assembled later by press-fitting to the housing. It may be.

(4) In the above embodiment, the case where the terminal block is mounted on the case of a device other than the motor case and the inverter case is exemplified. However, the terminal block may be provided in the motor case, for example. It is included in the technical scope of the present invention.
(5) In the above embodiment, the type in which the motor and the inverter are directly connected is illustrated, but the present invention can be similarly applied to a type in which the motor and the inverter are individually installed.
(6) The present invention is not limited to a motor and an inverter, and can be widely applied to all terminal blocks that electrically connect conductive members provided to extend from two electric devices.

T, T1 ... Terminal block 1 ... Mission case 2 ... Case upper wall 3 ... Through hole 10 ... Terminal 11 ... Outer connection part 12 ... Insertion hole 20, 20A ... Socket terminal (inner connection part)
DESCRIPTION OF SYMBOLS 30 ... Housing 31 ... Housing main body 45 ... Terminal insertion slot 46 ... Lead-in part 50 ... Cover 60 ... Terminal 62 ... Flexible conductor (vibration absorption part)
p ... Round pin terminal (pin terminal)

Claims (2)

A terminal block for connecting an inner conductive member and an outer conductive member arranged inside and outside the device,
A housing provided through the inside and outside of the device case;
And a terminal mounted on the housing and provided with connecting portions of the inner conductive member and the outer conductive member at inner and outer ends, respectively.
And, the connecting portion of the inner end side of the terminal, is constituted by the pin terminals and socket terminals of the tubular to be fitted and connected provided in the inner conductive members,
While the socket terminal is accommodated in the inner end of the housing, a terminal insertion port into which the pin terminal can be inserted is provided on the outer surface of the housing in a form communicating with the socket terminal, and the terminal insertion port A tapered lead-in part is formed at the mouth edge of
The housing is composed of a housing body molded in a form in which the socket terminal side of the terminal is opened, and a cover that is attached to the opening of the housing body so as to cover the socket terminal. And the cover, the terminal insertion opening is formed . The terminal block according to claim 1, wherein a flexible vibration absorbing portion is provided between the inner and outer connecting portions of the terminal.

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