JP2015095355A - Wire harness - Google Patents

Abstract

PROBLEM TO BE SOLVED: To fix a shield member with sufficient holding power even when the number of electric wires is increased and the shield member is widely disposed.SOLUTION: The invention relates to a wire harness which connects a first device with a second device. The wire harness comprises: a first shield connector 20 connected with the first device; a second shield connector 30 connected with the second device; electric wires 40 disposed between the first shield connector 20 and the second shield connector 30; a shield member 50 which is formed by a conductive metal material having a sheet-like form and shields the first device from the second device; and a bracket formed by a conductive metal plate, the bracket having shield member connection parts 64, which sandwich a periphery part 53 of the shield member 50 and are crimped to the periphery part 53, and also having case connection parts 65 which are connected with a case forming an outer surface of the first device.

Description

  The present invention relates to a wire harness including a bracket to which a shield member is crimped.

  2. Description of the Related Art Conventionally, as a shield connector attached and fixed to a shield case of a device, for example, the one described in Patent Document 1 below is known. The shield connector includes a synthetic resin housing and a metal shield shell covering the housing, and a plurality of terminals are held in the housing in a state of being prevented from coming off. Each terminal is connected to a terminal of an electric wire, respectively, and these electric wires are all drawn out behind the housing. The shield shell is integrally formed with a cylindrical shield connection cylinder, and a cylindrical shield member (for example, a braided wire) that covers a plurality of electric wires is attached to the shield connection cylinder on the outer peripheral side. The shield member is crimped and held on the shield connecting tube portion by caulking the caulking ring from the outer peripheral side of the shield member.

JP 2005-276630 A

  The crimping machine for caulking the caulking ring is configured to press the caulking ring against the shield connecting tube portion while deforming the caulking ring from above and below. However, the shield shell is not attached to the housing at the time when the caulking ring is caulked to the shield connecting cylinder, and is attached to the housing after caulking the caulking ring to the shield connecting cylinder. Therefore, when the caulking ring is caulked to the shield connecting cylinder, the inside of the shield connecting cylinder is hollow, and the shield connecting cylinder may be deformed to the inner peripheral side by pressing of the caulking ring. In this case, the shield member cannot be firmly clamped between the shield connecting tube portion and the caulking ring, and the shield member is likely to come off. Such a phenomenon is considered to be more likely to occur due to a decrease in rigidity in the vicinity of the center in the width direction of the shield connecting tube portion as the number of electric wires increases and the area where the shield member is disposed becomes wider. As a countermeasure against this, in order to mount the core that supports the shield connecting cylinder part from the inner peripheral side against the press of the caulking ring and prevents deformation, an electric wire is passed through the shield connecting cylinder part in advance. Because there is no space to install the core. As a result, deformation of the shield connecting tube portion cannot be prevented, and the holding force of the shield member is reduced.

  The present invention has been completed based on the above circumstances, and even when the number of electric wires is increased and the shield member is arranged wide, the shield member can be fixed with a sufficient holding force. The purpose is to do.

  The present invention is a wire harness that connects a first device and a second device, a first shield connector that is connected to the first device, and a second shield connector that is connected to the second device. An electric wire disposed between the first shield connector and the second shield connector; a shield member made of a conductive metal material in the form of a sheet, and shielding between the first device and the second device; A case connecting portion made of a conductive metal plate, having a shield member connecting portion sandwiched between the peripheral portions of the shield member and crimped to the peripheral portion, and connected to a case constituting the outer surface of the first device It is characterized in that it is configured to have a bracket having

  According to such a structure, a shield member can be firmly hold | maintained by clamping the peripheral part of a shield member from both sides by a shield member connection part, and crimping | bonding it. That is, since the shield member can be clamped from both sides, the shield member connecting portion is reliably crimped to the peripheral portion of the shield member. Thereby, even when the number of electric wires increases and the shield member is arranged wide, the shield member can be fixed with a sufficient holding force.

The following configuration is preferable as an embodiment of the present invention.
The shield member connecting portion may be configured to include a substrate portion and a pressure-bonding piece connected to the substrate portion so as to form an acute angle.
According to such a structure, since the peripheral part of a shield member can be inserted between a board | substrate part and a crimping | compression-bonding piece and it can crimp as it is, it is easy to crimp.

It is good also as a structure by which the part extruded to the other side is formed in one of the board | substrate part in the state crimped | bonded, and the crimping | compression-bonding piece.
According to such a structure, since the peripheral part of a shield member is clamped with high pressure by the extruded part, the retention strength of a shield member can be raised more.

It is good also as a structure by which a pair of case connection part is provided in the both sides of the board | substrate part.
According to such a configuration, the case connecting portion does not get in the way when crimping. Further, since the pair of case connecting portions are connected to the case, the shielding performance is improved.

  According to the present invention, the shield member can be fixed with a sufficient holding force even when the number of electric wires is increased and the shield member is disposed wide.

Perspective view of wire harness Exploded perspective view of wire harness The perspective view which showed the arrangement state of an electric wire permeate | transmitting the shield member of a wire harness The front view which showed the arrangement state of an electric wire permeate | transmitting the shield member of a wire harness Front view of wire harness The perspective view which showed simply the state which arranged the shield member connection part in the peripheral part of the shield member The perspective view which showed simply the state which crimped | bonded the shield member connection part to the peripheral part of the shield member, and let it pass under the electric wire The perspective view which showed simply the state where the shield member where the shield member connection part was crimped surrounded the circumference of an electric wire Sectional drawing which showed simply the state before crimping a shield member connection part to the peripheral part of a shield member with a crimping machine Sectional drawing which showed the state which has crimped the shield member connection part to the peripheral part of a shield member with a crimping machine simply Sectional drawing which showed simply the state after crimping | bonding a shield member connection part to the peripheral part of a shield member with a crimping machine Sectional drawing which showed simply the state before crimping a shield member connection part to the peripheral part of a shield member with the crimping machine in a modification Sectional drawing which showed simply the state which is crimping | bonding the shield member connection part to the peripheral part of a shield member with the crimping machine in a modification Sectional drawing which showed simply the state after crimping | bonding a shield member connection part to the peripheral part of a shield member with the crimping machine in a modification

<Embodiment>
An embodiment of the present invention will be described with reference to the drawings of FIGS. The wire harness 10 of the present embodiment is an example of a motor (an example of the “first device” of the present invention, not shown) and an inverter (an example of the “second device” of the invention, not shown). ) Is a power cable to connect between. The inverter is directly connected to the motor, and the inverter side terminal block (not shown) attached to the inverter case and the motor side terminal block (not shown) attached to the motor case are arranged at a very close distance. Has been. A first shield connector 20 is provided at one end of the wire harness 10, and a second shield connector 30 is provided at the other end of the wire harness 10. The first shield connector 20 is fitted and connected to the motor side terminal block, and the second shield connector 30 is fitted and connected to the inverter side terminal block.

  As shown in FIG. 3, between the first shield connector 20 and the second shield connector 30, a plurality of (in the illustrated case, six) electric wires 40 are arranged in parallel. The electric wire 40 includes a core wire formed by bundling a plurality of strands made of copper, copper alloy, aluminum, or aluminum alloy, and a coating made of an insulating resin that covers the core wire. Moreover, although the electric wire 40 is a large-diameter electric wire corresponding to a large current application, the electric wire 40 is flexible enough to be bent at approximately 90 °. Since the plurality of electric wires 40 are arranged side by side without being bundled, the plurality of electric wires 40 can be bent together at approximately 90 °.

  Next, the configuration of the second shield connector 30 will be briefly described. As shown in FIG. 2, the second shield connector 30 includes a second housing 31 made of synthetic resin, and a second terminal 32 formed integrally with the second housing 31. A metal plate 90 is attached to the second shield connector 30, and the second shield connector 30 is fixed to the inverter case by bolting the metal plate 90 to the inverter case.

  A second seal ring 81 is attached to the second housing 31, and the second seal ring 81 is connected to the metal plate 90 and the inverter case as the metal plate 90 is bolted to the inverter case. It is clamped between the outer surface and sealed from the inside of the case of the inverter to the inside of the second housing 31.

  A second bracket 70 including a second upper bracket 71 and a second lower bracket 72 is attached to the metal plate 90 by bolt fastening. As shown in FIG. 3, the second bracket 70 has a cylindrical second cylindrical portion 73 through which the plurality of electric wires 40 are inserted all together when the second upper bracket 71 and the second lower bracket 72 are assembled to each other. have. The second bracket 70 is formed by punching a conductive metal plate and bending it.

  A pair of upper and lower second shield member connection portions 74 to which the other end portion 52 of the shield member 50 described later is connected are formed on the pair of opposed side portions constituting the long side of the second cylindrical portion 73. Yes. These second shield member connection portions 74 have a plate shape, and are arranged in an opposed state when the second upper bracket 71 and the second lower bracket 72 are assembled to each other. On the other hand, a pair of plate connecting portions 75 that are fastened together with the metal plate 90 are formed on the pair of opposing side portions that constitute the short side of the second cylindrical portion 73 so as to protrude laterally. Specifically, a through hole is formed in the overlapping portion formed by overlapping a pair of plate connection portions 75, and a bolt 91 of a metal plate 90 is inserted into the through hole and a nut 92 is tightened to tighten the pair of plates. The connecting portion 75 is fastened to the metal plate 90 together.

  Next, the configuration of the first shield connector 20 will be described. As shown in FIG. 2, the first shield connector 20 includes a first housing 21 made of synthetic resin and a first terminal 22 formed integrally with the first housing 21. The first housing 21 can be fitted into a mounting hole (not shown) formed through the case of the motor. A first seal ring 80 is fitted on the outer peripheral surface of the first housing 21. When the first housing 21 is fitted into the mounting hole of the motor case, the first seal ring 80 is sandwiched between the outer peripheral surface of the first housing 21 and the inner peripheral surface of the mounting hole. The interior of the first housing 21 is sealed.

  A first bracket 60 including a first upper bracket 61 and a first lower bracket 62 is assembled to the first housing 21. Similarly to the second bracket 70, the first bracket 60 is a cylindrical first tubular shape through which the plurality of electric wires 40 are inserted in a lump when the first upper bracket 61 and the first lower bracket 62 are assembled to each other. A portion 63 is provided. The first bracket 60 is obtained by punching a conductive metal plate and bending it.

  A pair of upper and lower first shield member connection portions 64 to which one end portion 51 of a shield member 50 to be described later is connected are formed on a pair of opposed side portions constituting the long side of the first cylindrical portion 63. . These first shield member connecting portions 64 have a plate shape, and are arranged in an opposed state when the first upper bracket 61 and the first lower bracket 62 are assembled to each other.

  A pair of case connection portions 65 that are bolted to a case that constitutes the outer surface of the motor are formed on the opposite side portion on the short side that constitutes the first cylindrical portion 63 so as to protrude laterally. The pair of case connecting portions 65 are fastened together with the motor case. Further, the case connecting portion 65 includes a horizontal portion 65A that protrudes in the horizontal direction from the first tubular portion 63, a vertical portion 65B that protrudes in the vertical direction from the side edge of the horizontal portion 65A, and a tip of the vertical portion 65B. The fastening portion 65C extends in the horizontal direction again, and the horizontal portion 65A and the fastening portion 65C protrude in opposite directions with respect to the vertical portion 65B. Further, the horizontal portion 65A and the fastening portion 65C are arranged in parallel.

  The overlapping portion formed by overlapping the case connecting portion 65 of the first upper bracket 61 and the case connecting portion 65 of the first lower bracket 62 has a plurality of hooking protrusions 62A formed on the first lower bracket 62 side. And a plurality of hook recesses 61A formed on the first upper bracket 61 side. The hooking convex part 62A and the hooking concave part 61A are arranged separately in a horizontal part 65A and a fastening part 65C. Further, the hooking convex part 62A and the hooking concave part 61A are formed on both the peripheral edge of the case connecting part 65 that extends in the drawing direction of the electric wire W and the peripheral edge orthogonal to the peripheral edge. Therefore, the pair of case connecting portions are integrally held in a superposed state by fitting the hook convex portion 62A into the hook concave portion 61A and hooking it.

  Further, an anti-separation portion 66 is formed on the periphery of the horizontal portion 65 </ b> A of the case connection portion 65 of the first upper bracket 61. A hole 66 </ b> A is formed through the release preventing portion 66. On the other hand, a retaining protrusion 23 is formed on the outer peripheral surface of the first housing 21 to be inserted through the hole 66 </ b> A of the retaining portion 66.

  As shown in FIG. 2, an upper mounting protrusion 64 </ b> A is formed on the side edge of the first shield member connection portion 64 of the first upper bracket 61. The upper mounting protrusion 64 </ b> A is formed to protrude downward at the center of the long side portion of the first shield member connection portion 64. On the other hand, the upper surface of the first housing 21 is formed with an upper mounting hole 24A into which the upper mounting protrusion 64A is inserted.

  Similarly, a lower mounting protrusion 64 </ b> B is formed on the side edge of the first shield member connecting portion 64 of the first lower bracket 62. The lower mounting protrusion 64 </ b> B is formed to protrude upward at the center of the long side portion of the first shield member connection portion 64. On the other hand, a lower mounting hole (not shown) into which the lower mounting protrusion 64B is inserted is formed on the lower surface of the first housing 21.

  In a state where the upper mounting protrusion 64A is inserted into the upper mounting hole 24A and the lower mounting protrusion 64B is inserted into the lower mounting hole, the first bracket 60 can be moved by a predetermined dimension in the vertical direction. . In addition, in a state where the pair of retaining protrusions 23 are respectively inserted into the holes 66A of the pair of retaining portions 66, the pair of retaining protrusions 23 can be moved by a predetermined dimension in the horizontal direction. Therefore, in a state where the first bracket 60 is fixed to the motor case, the first shield connector 20 is allowed to move by a predetermined dimension in the vertical direction and the horizontal direction, but is disengaged from the first bracket 60. There is no such thing.

  Unlike the so-called braided wire, the shield member 50 is a woven fabric in which metal yarns are knitted, unlike a so-called braided wire. That is, in the braided wire, a plurality of metal yarns are crossed in an X shape, whereas in a metal cloth, a plurality of metal yarns are composed of warp and weft yarns, and are crossed in a + shape. Yes. For this reason, in the braided wire, the metal yarn is easily frayed, whereas in the metal cloth, the metal cloth is not frayed. Such a metal cloth is, for example, a fabric having a mesh structure in which metal yarns mainly composed of copper are woven so as to intersect each other in the vertical and horizontal directions. The metal cloth may have a structure in which a flexible film made of a resin material is attached to a metal yarn cloth.

  As shown in FIG. 9, the first shield member connecting portion 64 includes a first substrate portion 64C and a first pressure-bonding piece 64D connected to the first substrate portion 64C so as to form an acute angle. Has been. A first chamfer 64E is provided on the inner side of the front end of the first substrate portion 64C. Similarly, the second shield member connecting portion 74 includes a second substrate portion 74C and a second pressure-bonding piece 74D connected so as to form an acute angle with the second substrate portion 74C, and the second substrate portion 74C. A second chamfer 74E is provided on the inner side of the tip. The case connection portions 65 of the first bracket 60 are provided on both sides of the first substrate portion 64C, and the case connection portions 75 of the second bracket 70 are provided on both sides of the second substrate portion 74C.

  Here, a method for crimping the shield member 50 will be briefly described. As shown in FIG. 9, the peripheral portion 53 of the shield member 50 is inserted between the first substrate portion 64C and the first crimping piece 64D, and the peripheral portion 53 of the shield member 50 is placed on the first substrate portion 64C. Then, the crimping machine 100 is lowered from above the first crimping piece 64D. Then, as shown in FIG. 10, the first crimping piece 64 </ b> D is crimped and crimped to the peripheral portion 53 of the shield member 50. Then, when the crimping machine 100 is raised and the shield member 50 is removed from the crimping machine 100 as shown in FIG. 11, the first crimping piece 64D is caulked and the peripheral portion 53 of the shield member 50 becomes the first substrate portion 64C. And the first crimping piece 64D are fixed in a sandwiched state. Thus, the shield member 50 is connected to the motor case via the first bracket 60 and is connected to the inverter case via the second bracket 70.

  Since the first substrate portion 64C is longer than the first pressure-bonding piece 64D, the shield member 50 can easily come into contact with the tip of the first substrate portion 64C, but the tip of the first substrate portion 64C Since the first chamfer 64E is provided, the shield member 50 is prevented from being damaged.

  Next, a method of winding the shield member 50 around the plurality of electric wires 40 and retrofitting the shield member 50 to the first shield connector 20 and the second shield connector 30 will be described with reference to FIGS. 6 to 8. First, the terminals 22 and 32 are molded into the housings 21 and 31 so that the plurality of electric wires 40 are disposed between the first shield connector 20 and the second shield connector 30. As shown in FIG. 6, the first upper bracket 61 and the first lower bracket 62 are arranged side by side on the peripheral edge 53 of the one end 51 of the shield member 50. Similarly, the second upper bracket 71 and the second lower bracket 72 are arranged side by side on the peripheral edge 53 of the other end 52 of the shield member 50.

  Next, the shield pieces 64D and 74D of the brackets 61, 62, 71, and 72 are respectively crimped by a crimping machine so that the shield member connection portions 64 and 74 are crimped to the peripheral portion 53 of the shield member 50. Thus, the first upper bracket 61 and the first lower bracket 62 are connected side by side at the peripheral edge 53 of the one end 51 of the shield member 50, and the second upper bracket 71 and the second lower bracket 72 are connected to the shield member 50. They are connected side by side at the peripheral edge 53 of the other end 52. Thereafter, as shown in FIG. 7, the shield member 50 is passed through the lower side of the plurality of electric wires 40, and is arranged so that the plurality of electric wires 40 cross over the first lower bracket 62 and the second lower bracket 72.

  Then, after the surplus length portion 54 that is not crimped to each bracket 61, 62, 71, 72 of the shield member 50 is folded (in the vicinity of the folding line L1 in FIG. 7) and covered on the upper side of the plurality of electric wires 40, The shield member 50 is folded between the upper brackets 61 and 71 and the lower brackets 62 and 72 (near the folding line L2 in FIG. 7) so that the first upper bracket 61 and the second upper bracket 71 are placed above the plurality of electric wires 40. Cover.

  Then, as shown in FIG. 8, the shield member 50 is formed in a cylindrical shape as a whole in a state where the extra length portion 54 is folded into the shield member 50. Thereby, the 1st upper side bracket 61 and the 1st lower side bracket 62 are arrange | positioned in the opposing state, and the peripheral part 53 of the one end part 51 of the shield member 50 is wound around the some electric wire 40 over the perimeter. Moreover, the 2nd upper side bracket 71 and the 2nd lower side bracket 72 are arrange | positioned in the opposing state, and the peripheral part 53 of the other end part 52 of the shield member 50 is wound around the some electric wire 40 over the perimeter. At that time, the brackets 61, 62, 71, 72 are assembled to the shield connectors 20, 30. Thus, the shield member 50 is wound around the plurality of electric wires 40 and retrofitted to the shield connectors 20 and 30.

  As described above, in the present embodiment, the shield member 50 can be firmly held by sandwiching and crimping the peripheral portion 53 of the shield member 50 from both sides by the first shield member connecting portion 64. That is, since the shield member 50 can be clamped from both sides, the first shield member connection portion 64 is securely crimped to the peripheral portion 53 of the shield member 50. Thereby, even when the number of the electric wires 40 increases and the shield member 50 is arranged wide, the shield member 50 can be fixed with a sufficient holding force.

  The first shield member connecting portion 64 may be configured to include a first substrate portion 64C and a first pressure-bonding piece 64D coupled so as to form an acute angle with the first substrate portion 64C. .

  According to such a configuration, the peripheral edge portion 53 of the shield member 50 can be inserted between the first substrate portion 64C and the first pressure-bonding piece 64D and can be pressure-bonded as it is.

  It is good also as a structure by which the part extruded to the other side is formed in one of the 1st board | substrate part 64C and the 1st crimping | compression-bonding piece 64D in the state crimped | bonded.

  According to such a structure, since the peripheral part 53 of the shield member 50 is clamped with high pressure by the extruded portion 64F, the holding force of the shield member 50 can be further increased.

  It is good also as a structure by which a pair of case connection part 65 is provided in the both sides of the 1st board | substrate part 64C.

  According to such a configuration, the case connecting portion 65 does not get in the way when crimping. Further, since the pair of case connection portions 65 are connected to the case, the shielding performance is improved.

<Modification>
Next, a modification of the present invention will be described with reference to the drawings of FIGS. In this modification, the first bracket 60 is crimped using a crimping machine 101 in which the configuration of the crimping machine 100 of the embodiment is partially changed. Although not shown, the second bracket 70 may also be crimped by the crimping machine 101.

  A plurality of crimping ribs 103 are formed on the crimping surface 102 of the crimping machine 101. For this reason, when the first bracket 60 is crimped to the peripheral portion 53 of the shield member 50 by the crimping machine 101, the first crimping piece 64D is moved to the first substrate portion 64C side by the crimping rib 103 as shown in FIGS. The peripheral portion 53 of the shield member 50 is sandwiched with a high pressure between the extruded portion and the first substrate portion 64C. Therefore, it is possible to reliably prevent the shield member 50 from being detached from the first bracket 60.

<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) Although the above embodiment illustrates a shield member made of a conductive metal cloth, according to the present invention, a shield member made of a braided wire may be used.

  (2) In the above embodiment, the sheet-like shield member 50 is wound around the plurality of electric wires 40 to form a cylindrical shape. However, according to the present invention, the plurality of electric wires 40 are arranged along the outer surface of the case. In the case where the sheet-like shield member 50 is provided, the sheet-like shield member 50 may be simply covered from the opposite side to the case with respect to the plurality of electric wires 40, and may not necessarily be configured in a cylindrical shape.

  (3) In the above embodiment, the pair of brackets 61 and 62 are formed into a cylindrical shape by bolting the case to the case. However, according to the present invention, the pair of brackets are integrally formed via a hinge. May be prepared, and may be configured in a cylindrical shape by bending the hinge when retrofitting to the electric wire 40.

  (4) Although the pair of brackets 61 and 62 are fastened to the case together in the above embodiment, according to the present invention, the pair of brackets may be bolted separately to the case.

  (5) In the above embodiment, the terminals 22 and 32 are held by being molded integrally with the housings 21 and 31. However, according to the present invention, the terminals may be prevented from being detached by a lance provided in the housing. .

DESCRIPTION OF SYMBOLS 10 ... Wire harness 20 ... 1st shield connector 30 ... 2nd shield connector 40 ... Electric wire 50 ... Shield member 53 ... Peripheral part 60 ... 1st bracket 64 ... 1st shield member connection part 64C ... 1st board | substrate part 64D ... 1st Crimp piece 64F ... Extruded part 65 ... Case connection part

Claims (4)

A wire harness for connecting a first device and a second device,
A first shield connector connected to the first device;
A second shield connector connected to the second device;
An electric wire disposed between the first shield connector and the second shield connector;
A conductive metal material in the form of a sheet, and a shield member that shields between the first device and the second device;
A case connection made of a conductive metal plate, having a shield member connection portion sandwiched between the peripheral portions of the shield member and crimped to the peripheral portion, and connected to a case constituting the outer surface of the first device The wire harness provided with the bracket which has a part.   2. The wire harness according to claim 1, wherein the shield member connection portion includes a substrate portion and a crimping piece connected to the substrate portion so as to form an acute angle.   The wire harness according to claim 2, wherein a portion pushed out to the other side is formed on one of the substrate portion and the crimping piece in a crimped state.   The wire harness according to claim 2, wherein a pair of the case connection portions are provided on both sides of the substrate portion.

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