JP3909680B2 - Connector structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention particularly relates to a connector structure of a portion for connecting an electric wire / cable terminal to an input / output terminal of a motor mounted on an electric vehicle or an input / output terminal of a general device.
[0002]
[Prior art]
Generally, when connecting a wire / cable terminal that has been routed from a power supply to an input / output terminal on the device side, a terminal fitting such as a flat plate terminal called an LA terminal that is crimped to the wire / cable terminal is used as a device connection terminal with a bolt. Many structures are fastened together. On the other hand, as a special structural example of the terminal fittings that replace the flat terminal, the conductor of the electric wire / cable end is crimped on one side, and the bolt is screwed into the “female screw” formed on the other side, and the equipment side It may be fastened to the terminal.
[0003]
As such a terminal fitting with a female screw, for example, there is one disclosed in a direct connector shield connector described in Japanese Utility Model Laid-Open No. 6-58560 previously proposed by the applicant of the present application. This is schematically illustrated in FIG.
[0004]
A drive motor mounted on an electric vehicle is disclosed as an example of the device, and a flat terminal 2 is crimped to a terminal of a power connection cable 1 drawn from the motor. Further, in this case, the shielded wire 3 is shown as the power wire / cable routed from the vehicle-mounted power battery to the vehicle body, and the terminal fitting 4 is attached to the conductor 3a exposed by stripping the shield wire terminal. Crimped at one end. On the other hand, a shield connector 6 is fixed with bolts 7 using a metal motor outer plate case 5 as an attachment body, and the flat terminal 2 of the motor side cable terminal and the power source side shielded wire terminal are connected via the shield connector 6. The terminal fittings 4 are connected to each other to achieve electrical continuity.
[0005]
In this case, the terminal fitting 4 has a conductor 3a crimped on one end side, and a female screw 4a is threaded on the other end side. Accordingly, the flat terminal 2 and the terminal fitting 4 are fastened and connected by inserting the bolt 8 into the flat terminal 2 at the end of the motor side cable 1 and screwing the bolt 8 into the female screw 4 a of the terminal fitting 4.
[0006]
[Problems to be solved by the invention]
By the way, in the device direct attached shield connector shown in FIG. 5, the terminal fitting 4 with the female screw 4a is used as the connection terminal of the shielded electric wire 3 routed from the power source. Improvement is desired.
[0007]
One is to fasten the flat terminal 2 of the motor side cable 1 by screwing a bolt 8 into the female screw 4a with respect to the terminal fitting 4 which is positioned by being fitted to the housing 6a constituting the shield connector 6. That is. At that time, if there is a positional deviation or dimensional accuracy error in the flat terminal 2 or the peripheral member on the motor side, or if there is a dimensional accuracy or assembly error in each member such as the terminal fitting 4 on the connector housing 6a side, such an error is caused. Less freedom to absorb. As a result, when the bolt 8 is screwed into the female screw 4a, the fastening between the flat terminal 2 and the terminal fitting 4 is troublesome, and assembly work may be difficult.
[0008]
One is that the terminal fitting 4 has a portion for crimping the electric wire conductor 3a on one end side, and the other end side is threaded with a female screw 4a. Regardless of the forging process by rolling, the number of manufacturing steps increases and the cost of parts increases.
[0009]
In order to solve the above problems, an object of the present invention is to assemble by absorbing accuracy errors between members when connecting a power supply side electric wire / cable terminal to a motor terminal mounted on an electric vehicle via a connector, for example. An object of the present invention is to provide an electric wire / cable connector structure capable of improving work efficiency and reducing the manufacturing cost of terminals.
[0010]
[Means for Solving the Problems]
To achieve the above object, connector structure according to claim 1 according to the present invention includes a housing 11 of the connector held in the attached body 40, a wire / cable 20 connected to the housing 11, has a long hole shape of the bolt hole 24c is crimped to the terminal portion of the conductive line 20, the first connection terminal 24 facing the error absorption recess 18 provided on the side surface of the housing 11, the connection terminal 24 Toko connection partner Bolt holes 33a and 33b are provided at both ends for relaying electrical continuity by coupling to the second connecting terminal 31 at a location orthogonal to the error absorbing recess 18 of the housing 11, and the error substantially L-shaped bus held by protruding faces the absorbent recess 18 movably temporary positioning means along side the error absorbing recess 18 is provided for the housing 11 And over 33, the first connection terminal 24 and the second connecting terminal 31 thereof bolt hole 24c, the bolt 34, 32 for fastening the fastened together by inserting the 33a, the opening width of the error absorption recess 18 And nuts 35 and 36 which are held so as to be movable in the region and into which the bolts 34 are screwed together.
[0011]
With the above configuration, as shown in FIGS. 3 and 4, the first connection terminal 24 and the second connection terminal 31 are electrically connected using the bus bar 33 as a relay member. The first connection terminal 24 is coupled to one end of the bus bar 33 by a bolt 34 and a nut 35, and the terminal fastening portion by the bolt and nut is moved by adjusting the position within the region of the error absorbing recess 18 of the housing 11. Can be made. That is, by adjusting the movement of the bus bar 33, even when there is a positional deviation or a dimensional accuracy error in the device side member including the second connection terminal 31, the error can be absorbed.
[0012]
Further, connector structure according to claim 2, wherein the temporary positioning means, the surface where the second connection terminal 31 is fastened the bus bar 33 and the bolt of the housing 11, the error absorption recess 18 It is characterized by comprising a slit inserted toward the side surface provided with one side, and one side of the L-shaped bus bar 33 is inserted through the slit and temporarily positioned .
[0013]
3 and 4, for example , in the case where the electric wire / cable terminal on the power source side is connected to the motor terminal mounted on the electric vehicle via the connector, the accuracy error between the members is absorbed and the efficiency of the assembly work is improved. Can be achieved .
[0022]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a wire / cable connector structure according to the present invention will be described below in detail with reference to the drawings. FIG. 1 is a perspective view showing an appearance of a shield connector 10 according to the present embodiment, and FIG. 2 is a front view thereof.
[0023]
As shown in FIG. 3 of the assembly cross-sectional view, the shield connector 10 is mounted using, for example, an outer plate case 40 of a motor mounted on an electric vehicle as an attached body in the present invention. The motor outer case 40 is made of metal such as aluminum (Al) and is grounded G. The housing 11 of the shield connector 10 is fixed by being inserted into the motor outer plate case 40, and a ring-shaped packing 17 made of silicon rubber or the like is mounted between both members of the insertion portion. This packing 17 ensures waterproofness to prevent rainwater, muddy water, car wash water and the like from entering the motor outer plate case 40 from the outside through an electric wire / cable (hereinafter simply referred to as electric wire) 20.
[0024]
The housing 11 is an insulator of a resin molded product, for example, and can be formed into a complicated and arbitrary shape as illustrated. Connected to the housing 11 are three electric wires 20 routed from the in-vehicle power supply battery and routed to the vehicle body from the lower side in the figure. A flat plate terminal (LA terminal) 24 which is an electric wire / cable connection terminal referred to in the present invention is crimped to the terminals of the electric wires 20 as terminal terminals. In addition, as a device connection terminal in the present invention, for example, a flat plate terminal 31 is crimped to the end of a cable 30 drawn from a motor indicated by a virtual line in the drawing. Both flat plate terminals 24 and 31 have L-shaped ends using a bus bar 33 formed by bending a flat plate made of copper (Cu) or the like held in the upper portion of the housing 11 into an L-shape as an electrically conductive relay member. The bolt is fastened and connected.
[0025]
That is, the housing 11 is formed with an electric wire insertion hole 11a for holding a terminal portion of the electric wire 20 and a flat terminal 24 of a terminal terminal crimped to the tip on the inner central axis. An electric wire 20 is shown in which a conductor 21 made of copper (Cu) or the like is covered with an outer sheath 22. The outer sheath 22 is peeled off to expose the conductor 21. A flat plate terminal 24 is crimped to the conductor 21 by a crimping portion 24a. As is apparent from FIG. 4, a long hole-shaped bolt hole 24 c is provided in the connection portion 24 b of the flat terminal 24, and protrudes from the upper part of the main body of the housing 11 to the outside. The portion of the housing 11 through which the connecting portion 24b of the flat terminal 24 penetrates is formed as an error absorbing recess 18 represented by a side height dimension h by utilizing the characteristics of resin molding, and the connecting portion of the flat terminal 24 is provided there. 24b faces and protrudes outside the housing.
[0026]
In FIG. 3 again, a rubber plug 12 is elastically used as a packing member between the hole surface of the electric wire insertion hole 11a formed on the inner central axis of the housing 11 and the outer peripheral surface of the end portion of the electric wire 20 by elastic use. It is installed. As with the packing 17, the rubber plug 12 ensures waterproofness to prevent rainwater, muddy water, car wash water and the like from entering the housing 11 through the electric wire 20, or oil from the inside of the motor outer case 40. The oil-proof property which prevents a component from leaking outside can also be ensured. Behind the rubber plug 12 is mounted an electric wire holder 13 processed into a cylindrical shape with a metal material or the like. The electric wire holder 13 holds the end of the electric wire 20 in close contact with the outer periphery, and engages the engaging hole 13a provided in the cylindrical body by dropping the flange-like engaging rod 11b at the end of the housing 11 into engagement. ing. As a result, the electric wire holder 13 is joined by closing the end of the housing 11 while holding the electric wire 20.
[0027]
Furthermore, the shield shell 14 is mounted so as to fit around the outer periphery of the electric wire holder 13 and cover the periphery of the end portion of the electric wire 20. This shield shell 14 is a large-diameter cylindrical body obtained by press-working a conductive metal, and a flange portion 14a formed by expanding the bottom end into a flange shape is joined to the motor outer plate case 40 which is the attached body. Yes. By this joining, shield conduction between both members of the shield shell 14 and the motor outer plate case 40 is achieved. The shield shell flange portion 14a is fixed to the motor outer plate case 40 by being firmly joined by being engaged with an engaging claw 11d provided on the housing 11 side.
[0028]
On the other hand, the three electric wires 20 are covered with a braid 16 that is formed by knitting a conductive metal in a cylindrical shape from the outside of the entire wiring length or a necessary length portion of the wiring whole length. The hem end 16a of the braid 16 is closely attached to the outer periphery of the shield shell 14, but there is a concern that the hem end 16a may be detached from the shield shell 14 alone, so the hem end 16a is formed in a band shape from the outside. The braid fixing ring 15 is crimped. That is, the braid 16 is firmly held by sandwiching and crimping the bottom end portion 16a between the shield shell 14 and the braid fixing ring 15 from inside and outside. Thus, the electromagnetic wave generated from the electric wire 20 is absorbed and released by the shield conduction path consisting of the braid 16 → the shield shell 14 and the braid fixing ring 15 → the motor outer plate case 40 → the earth ground G.
[0029]
Here, the upper portion in the figure of the housing 11 facing the inside of the motor outer case 40 is set in a provisionally determined state in which the L-shaped bus bar 33 described above can be moved in the vertical direction in the figure. A bolt hole 33 a is provided on one end side of the bus bar 33, and protrudes to the outside facing the error absorbing recess 18 provided in the housing 11. Thereby, the one end side of the bus bar 33 has a shape that intersects the connecting portion 24b of the flat terminal 24 on the electric wire 20 side in the up-down direction. The other end of the bus bar 33 is in contact with the head surface of the housing 11 in the horizontal direction. A bolt hole 33 b is also provided on the other end side of the bus bar 33. Furthermore, square nuts 35 and 36, which are restricted from rotating together, are set in a temporarily positioned state on the housing 11 side at positions corresponding to the bolt holes 33a and 33b at both ends of the bus bar 33, respectively.
[0030]
Therefore, in this connector structure, when the connector structure corresponding to one electric wire 20 shown in the above configuration is one unit, as shown in FIG. 1 and FIG. In this example, three units corresponding to the three electric wires 20 are partitioned and arranged in parallel.
[0031]
The electric wire / cable connector structure according to the present embodiment configured as described above operates as follows.
Although the assembly order is not limited to the following, for example, first, the housing 11 of the shield connector 10 is fixed to the motor outer plate case 40 through the packing 17 in a state of securing oil-proof water. The shield shell 14 is fixed to the housing 11 by engaging the flange portion 14 a with the surface of the motor outer plate case 40 with the locking claw 11. On the other hand, the flat terminal 24 is pressure-bonded to the end conductor 21 of the electric wire 20, and the rubber plug 12 and the electric wire holder 13 are sequentially fitted to the end of the electric wire in this state by using a dedicated jig for temporary assembly. . The temporarily assembled electric wire is inserted into the housing 11 from one end side, and the electric wire holder 13 is fitted into the locking rod 11b on the housing 11 side and coupled. The braid 16 associated with the electric wire 20 is attached in close contact with the outer peripheral surface of the shield shell 14 so that the bottom end portion 16a is folded back. The braid fixing ring 15 is fitted from the outside of the hem end portion 16 a and is crimped, and the hem end portion 16 a is firmly sandwiched between the shield shell 14 and held.
[0032]
Thus, the flat terminal 24 at the tip of the electric wire 20 incorporated in the housing 11 protrudes toward the error absorbing recess 18 of the housing 11 and is exposed outside the housing. At that time, the bolt 34 is passed through the bolt long hole 24c of the flat terminal 24, and the bolt 34 is also passed through the bolt hole 33a on one end side of the bus bar 33 hanging down at the same time. A square nut 35 is put on standby in the error-absorbing concave portion 18 through which the bolt 34 is passed, and the bolt 34 is screwed into the square nut 35 to perform temporary assembly.
[0033]
On the other end side of the bus bar 33 which is horizontal, a square nut 36 is set in a restricted state in the housing head at a position facing the bolt hole 33b to prevent co-rotation. The flat plate terminal 31 at the end of the cable 30 drawn from the motor input / output terminal is aligned with the bolt hole 33b and the square nut 36 of the bus bar 33, and the bolt 32 is passed through the flat hole 31b of the flat plate terminal 31 and the bus bar 33. Screwed onto the nut 36.
[0034]
Thus, the electric wire 20 and the motor input terminal that have been routed from the power source are brought into an electrically conductive state by connecting both the flat plate terminals 24 and 31 via the bus bar 33. At this time, if the position error of the motor input terminal, the dimensional accuracy of the length of the cable 30, the error of the position of the terminal fitting 31 and the error due to the dimensional accuracy occur and the fastening work with the bolt 32 is difficult, the temporarily assembled bus bar 33 is Move to adjust the position. This adjustment movement of the bus bar 33 is represented by the fact that the bolt hole 24c of the electric wire side flat terminal 24 is a long hole and the housing 11 is provided with the error absorbing recess 18 so that the inside of the region (represented by the side sectional height h). And the accuracy error of each member on the motor side is absorbed by such movement of the bus bar 33. Thereby, the fastening operation between the motor-side flat plate terminal 31 and the bus bar 33 by the bolt 32 and the nut 36 can be easily performed, and the assembly is also performed by the final fastening of the flat plate terminal 24 and the bus bar 33 by the bolt 34 and the nut 35. Complete.
[0035]
In addition, although the shield connector 10 which covers the electric wire 20 from the outside with the braid 16 and shields the electromagnetic wave has been described as an embodiment, the present invention is not limited to such an electromagnetic wave shielding structure. For example, if it is applied to a simple terminal connection structure in which the connection terminal on the electric wire / cable side drawn from the power supply is fastened to the input / output terminal that is the equipment connection terminal, it will be misaligned and dimensional accuracy error with low-cost parts. Is effectively absorbed to improve the efficiency of assembly work.
[0036]
【The invention's effect】
As described above, connectors structure according to claim 1 according to the present invention, the first connecting terminal and the second connecting terminal are electrically connected by a bus bar to the relay member, one side of the bus bar The first connection terminal is coupled with a bolt and a nut, but such a terminal fastening portion can be moved by adjusting the position within the region of the error absorbing recess provided in the connector housing, and by moving and adjusting the bus bar. , even if the device-side member including a second connection terminal is displacement and dimensional accuracy error, it is possible to absorb the error.
[0037]
Further, connector structure according to claim 2, for example, when through the connector to the motor terminals of the electric-vehicle connecting wire / cable terminal of the power supply side, to absorb accuracy error between the members of the assembly work efficiency Can be achieved .
[Brief description of the drawings]
FIG. 1 is a perspective view showing an external appearance of a shield connector which is a main part of a connector structure according to the present invention.
FIG. 2 is a front view of the shield connector.
FIG. 3 is an assembled cross-sectional view of the shield connector.
FIG. 4 is an exploded perspective view showing a main part of the shield connector.
FIG. 5 is an assembled cross-sectional view showing a conventional connector structure using a terminal fitting with a female screw.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Shield connector 11 Housing 11a Wire insertion hole 11b Locking rod 12 Rubber plug 13 Wire holder 14 Shield shell 15 Braid fixing ring 16 Braid 16a Bottom end 17 Packing 18 Error absorbing recess 20 Wire 21 Conductor 24 Flat terminal (wire / cable connection Terminal)
24c Bolt long hole 31 Flat terminal (equipment connection terminal)
32, 34 Bolt 33 Bus bar 33a, 33b Bolt hole 35, 36 Square nut

Claims (2)

A housing of the connector held by the mounted body;
Wires / cables connected to this housing;
Has a crimped with long hole shape of the bolt hole in the terminal portion of the conductive line, a first connection terminal facing the error absorption recess formed on the side surface of the housing,
Each bolt hole is provided at both ends in order to relay electrical conduction attached at locations orthogonal to the error absorption recess of the housing to the second connection terminals as the connection counterpart to the connection terminal, wherein a substantially L-shaped bus bar held by the movable temporary positioning means along side the error absorption recess for the housing to protrude facing the error absorption recess is provided,
A bolt for inserting the first connection terminal and the second connection terminal into their bolt holes and fastening them by co-tightening;
A nut that is held movably within the opening width region of the error absorbing recess and the bolt is screwed together;
It features and to Turkey connector structure further comprising a. The temporary positioning means is
The side of the housing where the second connection terminal is bolted to the bus bar comprises a slit inserted toward the side surface where the error absorbing recess is provided, and one side of the L-shaped bus bar is connector structure according to claim 1, characterized in that the provisional positioning is inserted into the slit.

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