JP3877972B2 - Shield connector for equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a shield connector for equipment attached to equipment.
[0002]
[Prior art]
Conventionally, as a device shield connector for connecting a plurality of shielded wires to an inverter device in an electric vehicle, a connector portion is opened in a conductive shield case, and a device side terminal connected to the inverter is provided in the connector portion. The wire side terminal fixed to the terminal of each shielded wire is inserted into the connector part and connected to the device side terminal, respectively, and the terminal part of the shield member of each shielded wire is connected to the shield case, respectively. There is a connection structure.
[0003]
[Problems to be solved by the invention]
However, in this shield connector for equipment, it takes time and labor to insert the wire-side terminal into the connector portion and to connect the shield member to the shield case, respectively, as many times as the number of shielded wires. .
The present invention has been made in view of the above circumstances, and aims to improve workability of connection work.
[0004]
[Means for Solving the Problems]
The invention of claim 1 is connected to a device in which a plurality of device-side terminals are fixedly installed in a shield case, and is fixed to the terminals of a plurality of electric wires, with respect to the device-side terminals . Fixed to a plurality of electric wire side terminals made of a metal plate material that can be connected by bolting and a terminal portion of a shield member that collectively surrounds the plurality of electric wires, enabling connection to the shield case a tubular shield shell, wherein the plurality of to allow the fitted insert and the shield shell of the wire-side terminals, and a said set to be fitted against the shield case housing, inside the housing, that slit portion of the horizontally long opening is formed in the front end face, lateral center portion of the lower wall of the slit portion is caused to flex elastically by the interference between the wire-side terminals halfway insertion of the wire-side terminal Wherein and wire terminals is a resilient locking pieces for locking the retainer state for the wire terminals elastically restored and is properly inserted, the wire-side terminal retaining by the elastic latching pieces In this state, the electric wire side terminal is elastically sandwiched between the upper surface wall of the slit portion and the upper surface of the elastic locking piece, and the left and right sides of the elastic locking piece among the lower surface wall of the slit portion. A configuration is ensured on both sides that allows the wire-side terminal to be relatively displaced downward so as to approach the device-side terminal with respect to the housing while elastically bending the elastic locking piece. did.
[0006]
[Action and effect of the invention]
[Invention of Claim 1]
When the housing is fitted into the shield case, the plurality of electric wire side terminals are collectively set in a state where they can be connected to the device side terminals, so that the workability is better than that in which the electric wire side terminals are set one by one. . Also, since the shield shell is attached to the shield case only once, workability is good. In addition, when inserting the electric wire side terminal into the housing, the electric wire side terminal is automatically held in the retained state by the elastic bending and elastic return of the elastic locking piece. .
[0007]
In addition, when the electric wire side terminal is set , if the position of the electric wire side terminal is shifted in the separation direction with respect to the device side terminal, the electric wire side terminal is elastically bent to the housing while the bolt is tightened. The relative displacement occurs. Thereby, an electric wire side terminal can be reliably connected with respect to an apparatus side terminal, without making a housing displace relatively with respect to a shield case.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
[Embodiment 1]
A first embodiment of the present invention will be described below with reference to FIGS.
[0009]
The shield connector 20 for apparatus of this embodiment is attached to the inverter apparatus 10 (apparatus which is a component of the present invention) of an electric vehicle. The inverter device 10 has an inverter main body (not shown) housed in a shield case 11. A horizontally long mounting hole 12 is formed on the side wall of the shield case 11, and a mounting hole 12 on the outer surface of the side wall. A female screw hole 13 having a pair of left and right pouch-like paths (not opened on the inner surface of the shield case 11) is formed above. Inside the shield case 11, two device-side terminals 14 fixed to the inverter main body are waiting in a state where the tip end portion where the connection hole 15 is formed faces the attachment hole 12. The device-side terminal 14 is composed of a highly rigid bus bar made of a thick metal plate material, and in a state of being fixed to the inverter main body, the plate surface is horizontally oriented and the connection hole 15 is vertically penetrated. Yes.
[0010]
The device shield connector 20 includes three electric wire side terminals 21, a shield shell 26, a housing 32, and elastic holding means.
Each electric wire side terminal 21 is made of a highly rigid bus bar made of a thick metal plate material, as in the case of the device side terminal 14, and has an elongated shape in the front-rear direction as a whole. A connecting hole 22 having an oblong shape that is long in the front-rear direction is formed at the front end portion of the electric wire side terminal 21, and an electric wire crimping portion 23 having an open barrel shape is formed at the rear end portion. Each of the electric wire side terminals 21 is fixed to an extended end portion of the electric wire 24 that does not have a shield function and is extended from a wheel motor (not shown). The electric wire 24 is obtained by covering a conductor 24A formed by twisting a plurality of metal wires with a resin insulating coating 24B, and the insulating coating 24B is peeled off at the extended end portion to expose the conductor 24A. The wire crimping portion 23 is fixed to the exposed conductor 24A so as to be conductive by crimping. Further, a locking hole 25 is formed between the connection hole 22 and the electric wire crimping portion 23.
[0011]
The shield shell 26 is formed by press-molding a metal material. The shield shell 26 includes a horizontally long cylindrical portion 27 and a pair of left and right mounting portions 28 extending upward from the upper edge of the front end of the cylindrical portion 27. Bolt holes 29 are formed in the. On the outer periphery of the cylindrical portion 27 of the shield shell 26, a terminal portion of a flexible cylindrical shield member 30 that collectively surrounds the three electric wires 24 is fixed by a caulking ring 31 so as to be conductive. ing.
[0012]
The housing 32 is made of an insulating synthetic resin material, and a cylindrical portion 27 of the shield shell 26 is fitted on the outer periphery thereof. Further, a protrusion 33 is formed on the outer periphery of the housing 32 over the entire periphery, and a collective seal ring 34 is attached to the outer periphery of the protrusion 33. The front end surface of the base end portion of the attachment portion 28 of the shield shell 26 is brought into contact with the rear end surface of the protrusion 33.
Three terminal accommodating chambers 35 are formed inside the housing 32. The front end portion of each terminal accommodating chamber 35 is a horizontally long slit portion 36, and is open to the front end surface of the housing 32. A central portion in the left-right direction of the lower surface wall of the slit portion 36 is an elastic locking piece 37 that can be elastically bent in the vertical direction. The elastic locking piece 37 is configured to extend forward (in the insertion direction of the electric wire side terminal 21 with respect to the terminal accommodating chamber 35) in a cantilevered manner, and the upper surface of the extending end (the lower surface of the electric wire side terminal 21 and A locking projection 38 is formed on the corresponding surface. The distance between the upper surface wall of the slit portion 36 and the upper surface of the elastic locking piece 37 in a free state that is not elastically bent is substantially the same as the plate thickness of the electric wire side terminal 21. The distance between the upper surface wall of the slit portion 36 and the relief portions 39 on the left and right sides of the elastic locking piece 37 in the lower surface wall of the slit portion 36 is larger than the plate thickness dimension of the electric wire side terminal 21. It has been. A bending space 40 is formed below the elastic locking piece 37 to allow the elastic locking piece 37 to bend elastically downward.
[0013]
On the other hand, the rear end portion of each terminal accommodating chamber 35 is largely opened in a circular shape on the rear end surface of the housing 32 as a terminal insertion port 41, and the electric wire side terminal 21 is inserted into the terminal accommodating chamber 35 from the terminal insertion port 41. Has been. In the process of insertion, when the locking protrusion 38 comes into contact with the lower surface of the electric wire side terminal 21, the elastic locking piece 37 is elastically bent downward, and when the electric wire side terminal 21 is inserted to the normal position, the elastic locking piece 37 is elastically restored upward, and the locking projection 38 is locked in the locking hole 25, so that the electric wire side terminal 21 is not allowed to move backward (rearward) with respect to the housing 32 (terminal housing chamber 35). Is held in. In this holding state, the upper surface of the electric wire side terminal 21 is elastically sandwiched between the upper surface wall of the slit portion 36 and the upper surface of the elastic locking piece 37 (see FIG. 3). In addition, the relief portions 39 on both the left and right sides of the elastic locking piece 37 in the lower surface wall of the slit portion 36 cause the electric wire side terminal 21 to be below the housing 32 (the device side terminal 14 while elastically bending the elastic locking piece 37. It is a clearance that allows relative displacement in the direction approaching.
[0014]
Each terminal insertion port 41 is provided with an individual seal ring 42, and the individual seal ring 42 seals the gap between the inner periphery of the terminal insertion port 41 and the outer periphery of the insulation coating 24B of the electric wire 24 in a watertight state. ing. The individual seal ring 42 is restricted from being detached from the housing 32 by the retainer 43.
When attaching the shield connector 20 for equipment of this embodiment having the above-described configuration to the inverter device 10, the three electric wire side terminals 21, the shield shell 26, and the housing 32 are integrated, and the housing 32 is attached to the attachment hole 12. And a bolt (not shown) penetrating the bolt hole 29 of the shield shell 26 into the female screw hole 13 of the shield case 11 is attached to the outer surface of the shield case 11. Thus, the shield shell 26 is fixed to the shield case 11 so as to be conductive.
[0015]
In this state, the collective seal ring 34 on the outer periphery of the housing 32 is in close contact with the inner periphery of the mounting hole 12, so that the gap between the housing 32 and the mounting hole 12 is sealed in a watertight state. Further, in the shield case 11, by fitting the housing 32 in the mounting hole 12, the three electric wire side terminals 21 held in the loosely regulated state in the housing 32 are collectively connected to the device side terminal 14. On the other hand, it is set to be connectable. In this state, the three electric wire side terminals 21 are positioned so as to overlap the corresponding device side terminals 14 from above in such a posture that the plate surface is horizontally oriented and penetrates the connection hole 22 in the vertical direction. In addition, the connection holes 15 and 22 of the electric wire side terminal 21 and the device side terminal 14 correspond to each other vertically. Therefore, when the bolt 45 is passed through the corresponding connection holes 15 and 22 and the nut 46 is screwed into the bolt 45 and tightened, the electric wire side terminal 21 and the equipment side terminal 14 are connected to the head 45A of the bolt 45. Between the nut 46 and the nut 46 so as to be electrically connected by being clamped up and down.
[0016]
When performing the connection work using the bolt 45 and the nut 46, if the wire side terminal 21 is slightly lifted from the normal height with respect to the device side terminal 14, that is, slightly in the tightening direction by the bolt 45 and the nut 46. When the bolt 45 and the nut 46 are tightened, the electric wire side terminal 21 is pressed downward so as to approach the device side terminal 14. Then, the elastic locking piece 37 is elastically bent downward by being pushed by the electric wire side terminal 21, so that the electric wire side terminal 21 can be in close contact with the device side terminal 14 without any trouble. At this time, the housing 32 is not relatively displaced in the vertical direction within the mounting hole 12.
[0017]
As described above, according to the shield connector for equipment 20 of the present embodiment, the three electric wire side terminals 21 can be connected to the equipment side terminal 14 only by fitting the housing 32 into the mounting hole 12 of the shield case 11. Since it can be set in a batch, workability is good.
Further, since the shield shell 26 is attached to the shield case 11 only once, the workability is good.
Furthermore, when the electric wire side terminal 21 is inserted into the housing 32, the electric wire side terminal 21 is automatically held in the retained state by the elastic bending and elastic return of the elastic locking piece 37. The insertion workability is also good.
[0018]
Further, when the electric wire side terminal 21 and the device side terminal 14 are connected, even if there is a slight misalignment between the terminals 14 and 21 in the vertical direction, the misalignment is caused by the elastic locking piece 37. Since it is absorbed by the elastic bending, both terminals 14 and 21 can be brought into a normal connection state without any trouble.
[Other Embodiments]
The present invention is not limited to the embodiment 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, and further, within the scope not departing from the gist of the invention other than the following. Various modifications can be made.
[0019]
(1) Although the case where the number of poles is three has been described in the above embodiment, the present invention can be applied to the case where the number of poles is two or four or more.
(2) In the above embodiment, the case where the connection partner device is an inverter device of an electric vehicle has been described. However, the present invention can also be applied to a case where a device other than the inverter device is the connection partner.
(3) In the above embodiment, the elastic locking piece is provided only below the electric wire side terminal. However, according to the present invention, it may be provided above the electric wire side terminal, or may be provided both above and below. .
[0020]
(4) Although the above embodiment has been described with a waterproof function, the present invention can also be applied to a non-waterproof one.
[Brief description of the drawings]
FIG. 1 is a perspective view of Embodiment 1. FIG. 2 is a front view. FIG. 3 is a cross-sectional view of a state where it is attached to an inverter device. Explanation of]
10. Inverter device (equipment)
DESCRIPTION OF SYMBOLS 11 ... Shield case 14 ... Equipment side terminal 20 ... Equipment shield connector 22 ... Electric wire side terminal 24 ... Electric wire 26 ... Shield shell 30 ... Shield member 32 ... Housing 37 ... Elastic locking piece 45 ... Bolt

Claims (1)

It is connected to a device in which a plurality of device side terminals are fixed in the shield case,
A plurality of electric wire side terminals made of a metal plate material fixed to the terminals of the electric wires, and capable of being connected by bolting to the equipment side terminals;
A cylindrical shield shell that is fixed to a terminal portion of a shield member that collectively surrounds the plurality of electric wires, and that can be connected to the shield case;
A housing that enables insertion of the plurality of electric wire side terminals and external fitting of the shield shell, and a housing that can be fitted to the shield case,
In the housing, a horizontally long slit is formed in the front end surface of the housing, and a central portion in the left-right direction of the bottom wall of the slit is caused by interference with the wire side terminal during insertion of the wire side terminal. It is an elastic locking piece that generates elastic bending and elastically recovers when the electric wire side terminal is properly inserted, and locks it in a retaining state with respect to the electric wire side terminal .
In a state where the electric wire side terminal is prevented from being pulled out by the elastic locking piece, the electric wire side terminal is elastically sandwiched between the upper surface wall of the slit portion and the upper surface of the elastic locking piece, and the slit The wire side terminal is relatively displaced downward on the left and right sides of the elastic locking piece so that the elastic locking piece is elastically bent toward the device side terminal with respect to the housing. A shield connector for equipment, which has a clearance to allow it to be performed .

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