JP2017073220A - connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the cost of manufacture by suppressing adhesion of the oil component in a case, to which a connector is attached, to a covered conductor, thereby allowing usage of a covered conductor.SOLUTION: A shield connector 1 (connector) includes a covered conductor W, a housing 11 into which the covered conductor W is inserted, and having a wire insertion port 22, and a cylinder section 23 extending cylindrically from the opening edge of the wire insertion port 22, and into which the covered conductor W is inserted, a terminal fitting 10 connected with a core wire 30 at the tip of the covered conductor W extending from the tip side of the cylinder section 23, and a heat- shrinkable tubing 17 (coating member) covering the connection part of the terminal fitting 10 and core wire 30, where the end on the cylinder section 23 side is covering the cylinder section 23.SELECTED DRAWING: Figure 3

Description

  The technology disclosed in this specification relates to a connector.

  Conventionally, in a covered electric wire in which a terminal fitting is connected to a core wire at the tip, a portion in which a connecting portion of the terminal fitting and the core wire is covered with a covering member in order to protect the core wire from water or the like is known (for example, Patent Document 1). Specifically, the wire harness described in Patent Document 1 includes an insulated wire and a terminal fitting connected to the core wire at the tip of the insulated wire, and a connection portion between the terminal fitting and the core wire is formed by a water stop tube. Covered.

  Conventionally, there has been known a connector in which a covered electric wire in which a terminal fitting is connected to a core wire at a distal end portion is inserted (see, for example, Patent Document 2). Specifically, the electric wire holding structure (corresponding to a connector) described in Patent Document 2 is a seal holding portion having an insertion hole through which an electric wire having a terminal provided at the tip portion is inserted, and is a member to be attached (equipment case) The seal holding part accommodated in the attachment hole formed in (3) is provided, and the seal holding part is accommodated in the attachment hole and the terminal is connected to the device.

JP 2015-26429 A JP 2014-3033 A

  When the wire harness described in Patent Document 1 is used for the connector described above, the core wire of the insulated wire is not exposed in the case of the device, so that the core wire can be protected from moisture in the case. However, according to the wire harness described in Patent Document 1, although the core wire is not exposed in the case, a portion of the insulated wire that is not covered with the water stop tube may be exposed in the case. If the insulated wire is exposed in the case, the oil in the case may adhere to the insulated wire coating, thereby degrading (for example, dissolving) the coating.

  For this reason, when using the wire harness of patent document 1 for the connector mentioned above, it is desirable to use the insulated wire which has oil resistance. However, in general, an insulated wire having oil resistance is more expensive than an insulated wire having no oil resistance, and thus there is a problem that the manufacturing cost of the connector increases.

  In this specification, it is possible to use a coated electric wire that does not have oil resistance by suppressing the oil in the case to which the connector is attached from adhering to the coated electric wire, thereby disclosing the technology for reducing the manufacturing cost of the connector. To do.

  A connector disclosed in the present specification is a covered electric wire and a housing through which the covered electric wire is inserted, and extends in a cylindrical shape from an electric wire insertion port and an opening edge of the electric wire insertion port, A housing having a cylindrical portion through which a covered electric wire is inserted, a terminal fitting connected to a core wire at a distal end portion of the covered electric wire extending from a distal end side of the cylindrical portion, and the terminal fitting and the core wire A covering member covering a connecting portion, wherein an end on the cylindrical portion side covers the cylindrical portion.

  According to said connector, since the edge part by the side of the cylinder part of the coating | coated member which coat | covers the connection part of a terminal metal fitting and a core wire has coat | covered the cylinder part, a covered electric wire is not exposed in the case of an apparatus. For this reason, it can suppress that the oil component in a case adheres to the coating | cover of a covered electric wire. As a result, it is possible to use a covered electric wire having no oil resistance, and the manufacturing cost of the connector can be reduced as compared with the case of using a covered electric wire having oil resistance.

  The housing is formed in a cylindrical shape, and the connector is a partition partitioning the interior of the housing in the extending direction of the covered electric wire, the partition having the wire insertion port formed therein, and the partition And a ring-shaped rubber stopper that is provided on the opposite side of the cylindrical portion and that stops water between the covered electric wire and the housing.

  According to the connector described above, since the end of the covering member on the tube portion side covers the tube portion as described above, the rubber plug is not exposed in the case of the device. For this reason, it can also suppress that the oil in a case adheres to a rubber stopper. As a result, it is possible to use a rubber plug that does not have oil resistance, and the manufacturing cost of the connector can be reduced compared to the case of using a rubber plug that has oil resistance.

  The covering member may be a heat shrinkable tube.

  According to said connector, a coating | coated member can be easily fixed by utilizing the property of the heat-shrinkable tube which shrinks by heating.

  According to the connector disclosed in this specification, it becomes possible to use a coated electric wire that does not have oil resistance by suppressing the oil in the case to which the connector is attached from adhering to the coated electric wire, thereby reducing the manufacturing cost of the connector. Can be reduced.

The perspective view of the connector concerning an embodiment Connector exploded perspective view Cross section of connector Perspective view of housing

<Embodiment>
The embodiment will be described with reference to FIGS. In the following description, the vertical direction and the front-rear direction are based on the vertical direction and the front-rear direction shown in FIG. Further, the left side means the back side of the paper in FIG. 3, and the right side means the front side of the paper in FIG.

  First, with reference to FIG. 1, the outline of the shield connector 1 (an example of a connector) which concerns on this embodiment is demonstrated. The shield connector 1 is inserted with three covered electric wires W (W1, W2, W3) for electrically connecting an inverter mounted on a vehicle such as an electric vehicle or a hybrid vehicle and a three-phase motor. The fitting portion 11C is fitted into a fitting hole provided in a metal case that houses the inverter or the three-phase motor, and is attached to the case. Then, the terminal fitting 10 connected to each covered wire W is connected to the inverter or the three-phase motor, whereby the inverter and the three-phase motor are connected.

(1) Configuration of Shield Connector As shown in FIG. 2, the shield connector 1 includes three covered electric wires W (W1, W2, W3), and a core wire 30 at the front end portion in the fitting direction of each of the covered electric wires W (FIG. 3). Three terminal fittings 10 which are connected to each other, a housing 11 through which a covered electric wire W is inserted, a seal ring 12, three rubber plugs 13, a pair of halves 14, a shield bracket 15, a caulking ring 16, 3 Two heat-shrinkable tubes 17 (an example of a covering member) are provided.

Each of the three covered electric wires W is obtained by covering the core wire 30 with an insulating coating having no oil resistance.
The terminal fitting 10 is formed by punching or bending using a conductive metal flat plate as a base material, and a contact portion 10A connected to a device (inverter or three-phase motor) and a core wire of the covered electric wire W And a barrel portion 10 </ b> B for crimping 30 to the terminal fitting 10. The contact portion 10A is formed in a flat plate shape, and a bolt insertion hole 10C through which a bolt for connecting the terminal fitting 10 to a device is inserted in the plate thickness direction.

  The housing 11 is roughly formed in a horizontally long cylindrical shape in the left-right direction, and a flange 11A is provided around the outer periphery. Further, as shown in FIGS. 3 and 4, the inside of the housing 11 is partitioned in the front-rear direction (an example of the extending direction of the covered wire) by the partition wall 11B.

  As shown in FIG. 2, the front portion of the housing 11 from the flange 11A constitutes a fitting portion 11C. A groove 11D that is recessed over the entire circumference is formed on the outer peripheral surface of the fitting portion 11C, and the outer peripheral surface of the fitting portion 11C and the inner peripheral surface of the fitting hole provided in the case of the device in the groove 11D. A synthetic resin seal ring 12 that seals between the two is fitted (see FIG. 1).

  As shown in FIG. 4, the fitting portion 11C has a so-called race track shape that is composed of two straight lines and two semicircles when viewed from the front side, and the inside is left and right by the two wall portions 20 (20A, 20B). It is partitioned into three spaces 21 (21A, 21B, 21C) in the direction. The partition wall 11B that partitions the housing 11 forward and backward is provided with an electric wire insertion port 22 through which the covered electric wires W are individually inserted for each of the three spaces 21. The inner diameter of the electric wire insertion port 22 is slightly larger than the outer diameter of the covered electric wire W.

  Further, the partition wall 11B is integrally provided with a cylindrical portion 23 that extends in a cylindrical shape from the opening edge of each electric wire insertion opening 22 toward the front side. And as shown in FIG. 3, the covered electric wire W is penetrated inside the cylinder part 23. As shown in FIG. The front portion of the covered electric wire W extends forward from the front side of the cylindrical portion 23 (an example of the distal end side of the cylindrical portion), and the terminal fitting 10 described above is connected to the core wire 30 at the distal end portion.

As shown in FIG. 2, the rear portion of the housing 11 from the flange 11 </ b> A has a configuration in which three cylindrical portions 24 extending in a cylindrical shape in the front-rear direction are arranged in parallel in the left-right direction and adjacent cylindrical portions 24 are connected to each other. As shown in FIG. 3, a ring-shaped rubber plug 13 through which the covered electric wire W is passed is accommodated inside the cylindrical portion 24. The rubber plug 13 is for stopping water between the covered electric wire W and the housing 11, and in this embodiment, the rubber plug 13 having no oil resistance is used.
Each cylindrical portion 24 is configured such that the internal spaces at the rear end portions thereof are in communication with each other, and the internal spaces are integrally configured so that the rear portions of the two halves 14 are accommodated. A housing recess 29 is formed.

  As shown in FIG. 2, the two halves 14 are obtained by arranging three cylinders in parallel in the left-right direction and connecting the rear portions of adjacent cylinders to each other on a plane passing through the central axis of the three cylinders. It is formed in a shape that is divided into upper and lower parts. As shown in FIG. 3, the cylinder described above has a small inner diameter at two locations in the axial direction, and corresponds to the inner surface of the recess 14 </ b> A of the half-split body 14 (more specifically, the inner peripheral surface of the cylinder described above). On the surface), a wire pressing portion 25 having a shape in which two trapezoidal peaks projecting in an annular shape are arranged in the front-rear direction is formed. The two halves 14 are assembled in a state where the respective covered electric wires W are sandwiched between the inner surfaces of the recesses 14 </ b> A, and each of the covered electric wires W is pressed by the electric wire pressing portion 25 over the entire circumference, thereby being divided into two halves. It is held by the body 14.

  Further, each of the halves 14 is provided with a retaining protrusion 14 </ b> B on the surface facing the halves accommodating recess 29. On the other hand, the halved housing recess 29 is provided with a retaining hole 26 into which the retaining projection 14B is fitted from the inside and locked in the front-rear direction. Therefore, in the state where each retaining projection 14B is fitted in each retaining hole 26, each half 14 is held in the half housing recess 29, and the rubber plug 13 is retained.

  As shown in FIG. 2, the shield bracket 15 includes a bracket cylindrical portion 15A formed in a cylindrical shape, and a bracket attachment portion 15B for attaching the shield bracket 15 to a device. The shield bracket 15 is a metal member that collectively covers the rear portion (that is, the three cylindrical portions 24) of the housing 11, and is manufactured by aluminum die casting in this embodiment.

  A bolt insertion hole 15C is formed in the bracket attachment portion 15B, and the shield bracket 15 is fixed to the case by inserting the bolt into the bolt insertion hole 15C and fastening it to the case of the device. Thereby, the shield connector 1 is prevented from falling off, and the shield bracket 15 and the case are electrically connected to secure a shield path.

  The caulking ring 16 is for caulking and fixing a substantially cylindrical braided wire (not shown) to the outer peripheral surface of the bracket cylindrical portion 15A. A braided wire (not shown) surrounds the three electric wires W in a lump, and the end portion is covered with the bracket cylindrical portion 15A. Then, the braided wire is fixed to the bracket cylindrical portion 15A by press-fitting the caulking ring 16 from above the braided wire with the braided wire covering the bracket cylindrical portion 15A.

The heat-shrinkable tube 17 is made of vinyl chloride, polyolefin, ethylene propylene, or the like, and its diameter is greatly shrunk without being greatly changed by heating. Note that FIG. 2 shows a cylindrical heat-shrinkable tube 17 before shrinking.
The heat shrinkable tube 17 shown in FIG. 3 is the one after being heated and shrunk. As shown in FIG. 3, the heat-shrinkable tube 17 covers the range including the connecting portion between the barrel portion 10 </ b> B and the core wire 30 in the covered electric wire W to which the terminal fitting 10 is connected, and the rear end portion (the cylinder portion side) Is covered so that the outer peripheral surface of the cylinder part 23 may be covered over the entire circumference. More specifically, the heat-shrinkable tube 17 covers a range from a position between the contact portion 10 </ b> A of the terminal fitting 10 and the barrel portion 10 </ b> B to the rear end of the cylindrical portion 23. Note that an adhesive may be applied to the inner surface of the heat shrinkable tube 17 in order to improve adhesion.

(2) Effects of the Embodiment According to the shield connector 1 according to the present embodiment described above, the rear end portion (on the cylinder portion 23 side) of the heat-shrinkable tube 17 covering the connection portion between the terminal fitting 10 and the core wire 30. Since the end portion covers the cylindrical portion 23, the covered electric wire W is not exposed in the case of the device. For this reason, it can suppress that the oil in a case adheres to the coating | cover of the covered electric wire W. Thereby, it becomes possible to use the covered electric wire W which does not have oil resistance, and can reduce the manufacturing cost of the shield connector 1 compared with the case where the covered electric wire W which has oil resistance is used.

  Furthermore, according to the shield connector 1, since the rear end portion (end portion on the cylinder portion 23 side) of the heat shrinkable tube 17 covers the cylinder portion 23 as described above, the rubber plug 13 is also exposed in the case of the device. do not do. For this reason, it can also suppress that the oil in a case adheres to the rubber stopper 13. As a result, it is possible to use the rubber plug 13 that does not have oil resistance, and the manufacturing cost of the shield connector 1 can be reduced as compared with the case where the rubber plug 13 that has oil resistance is used.

  Furthermore, according to the shield connector 1, the covering member can be easily fixed by utilizing the property of the heat shrinkable tube 17 that shrinks by heating.

<Other embodiments>
The technology disclosed in the present specification 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 disclosed by the present specification.

  (1) In the above embodiment, the case where the three covered electric wires W are inserted through the shield connector 1 has been described as an example. However, the number of the covered electric wires W inserted through the shield connector 1 is not limited to three. And can be determined as appropriate.

  (2) In the above embodiment, the heat-shrinkable tube 17 has been described as an example of the covering member. However, the covering member can cover the connection portion between the terminal fitting 10 and the core wire 30, and the end on the tube portion 23 side is the tube portion. If it can coat 23, it will not be limited to heat contraction tube 17.

DESCRIPTION OF SYMBOLS 1 ... Shield connector (an example of a connector) 10 ... Terminal metal fitting, 11 ... Housing, 11B ... Bulkhead, 11C ... Fitting part, 13 ... Rubber plug, 17 ... Heat-shrinkable tube (an example of a covering member), 22 ... Electric wire insertion Mouth, 23 ... Cylinder, 30 ... Core, W ... Coated wire

Claims (3)

Sheathed wire,
A housing through which the covered electric wire is inserted, the electric wire insertion port, and a cylindrical portion extending from the opening edge of the electric wire insertion port in a cylindrical shape and into which the covered electric wire is inserted When,
A terminal fitting connected to the core wire of the tip end portion of the covered electric wire extending from the tip end side of the cylindrical portion;
A covering member covering a connecting portion between the terminal metal fitting and the core wire, and a covering member in which an end portion on the cylindrical portion side covers the cylindrical portion;
Connector with. The housing is formed in a cylindrical shape,
The connector is
A partition that partitions the interior of the housing in the extending direction of the covered electric wire, and the partition in which the wire insertion port is formed;
A ring-shaped rubber stopper that is provided on the opposite side of the cylindrical portion across the partition, and that stops water between the covered electric wire and the housing;
The connector according to claim 1, comprising:   The connector according to claim 1, wherein the covering member is a heat shrinkable tube.

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