Wire harnesses

Abstract

To provide a wire harness which can improve assembly workability while suppressing an increase in the number of components.SOLUTION: A wire harness 10 comprises: a first shield electric wire 20 that includes first electric wires 21 and a cylindrical first braided member 22 covering the outer peripheral side of the first electric wires 21; a second shielded electric wire 30 that includes second electric wires 31 and a cylindrical second braided member 32 covering the outer peripheral side of the second electric wires 31; and a bracket 50 that is fastened to an earth member 70 while being electrically connected to the first braided member 22 and the second braided member 32. The wire harness 10 is further provided with a terminal 40 that is electrically connected to the second braided member 32. The bracket 50 has a cylindrical part 51 where the first electric wires 21 are inserted and the first braided member 22 is fastened on its outer peripheral surface, and a terminal fixing part 54 to fix the terminal 40.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a wire harness. [Background technology]

[0002] Conventionally, there has been a wire harness that includes, for example, a plurality of shielded electric wires each having electric wires and a braided member covering the outer periphery of the electric wires, and a bracket to which each of the braided members is connected (see, for example, Patent Document 1). Each of the braided members in this wire harness is fitted with a shield terminal consisting of a shield sleeve and a shield contact. Each of the conductive shield terminals is fixed in a through hole of the bracket. In this wire harness, all of the braided members are connected to ground by fixing the bracket to a ground member to which the bracket is attached. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2005-285748 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the above-described wire harness, a shield terminal consisting of a shield sleeve and a shield contact is required for each braided member, which increases the number of parts.

[0005] To address this issue, a configuration that reduces the number of parts can be considered, for example, by providing a cylindrical portion on the bracket and simultaneously fixing multiple braided members to the cylindrical portion with a bundling member such as a crimping ring. However, this configuration has the problem of poor workability in the task of simultaneously positioning and fixing multiple braided members to the cylindrical portion.

[0006] An object of the present disclosure is to provide a wire harness that can improve assembly workability while suppressing an increase in the number of parts. [Means for solving the problem]

[0007] The wire harness of the present disclosure includes a first shielded electric wire having a first electric wire and a tubular first braided member covering the outer periphery of the first electric wire, a second shielded electric wire having a second electric wire and a tubular second braided member covering the outer periphery of the second electric wire, and a bracket to which the first braided member and the second braided member are electrically connected and fixed to an earth member, and the wire harness includes a terminal electrically connected to the second braided member, and the bracket has a tubular portion through which the first electric wire is inserted and to which the first braided member is fixed on the outer periphery, and a terminal fixing portion to which the terminal is fixed. [Effects of the Invention]

[0008] According to the wire harness of the present disclosure, it is possible to improve the assembly workability while suppressing an increase in the number of parts. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a partial perspective view of a wire harness according to an embodiment. [Figure 2] FIG. 2 is a partial perspective view of a wire harness according to another embodiment. [Figure 3] FIG. 3 is a partial perspective view of a wire harness according to another embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0010] [Description of the embodiments of the present disclosure] First, embodiments of the present disclosure will be listed and described. The wire harness of the present disclosure includes: [1] A wire harness comprising: a first shielded electric wire having a first electric wire and a tubular first braided member covering the outer periphery of the first electric wire; a second shielded electric wire having a second electric wire and a tubular second braided member covering the outer periphery of the second electric wire; and a bracket to which the first braided member and the second braided member are electrically connected and fixed to an earth member, the wire harness comprising a terminal electrically connected to the second braided member, and the bracket having a tubular portion through which the first electric wire is inserted and to which the first braided member is fixed on the outer periphery, and a terminal fixing portion to which the terminal is fixed.

[0011] According to this configuration, the first braided member is directly fixed to the outer periphery of the tubular portion of the bracket, and the second braided member is fixed to the terminal fixing portion of the bracket via the terminal. In this way, the number of parts can be prevented from increasing, and the fixing work can be performed sequentially, thereby improving the ease of assembly.

[0012] [2] In the above [1], the terminal may have a terminal hole, the terminal fixing portion may have a fixing hole, the terminal may be fixed to the terminal fixing portion by a bolt passing through the terminal hole and the fixing hole, and the bracket may be fixed to the earth member by the bolt.

[0013] According to this configuration, the terminal is fixed to the terminal fixing portion and the bracket is fixed to the earthing member by a single bolt, so the number of parts can be reduced compared to a configuration in which the parts are fixed by separate bolts, for example.

[0014] [3] In the above [2], the terminal may have a locking piece, and the terminal fixing portion may have a lockable portion that can engage with the locking piece to restrict rotation of the terminal around the terminal hole.

[0015] According to this configuration, the terminal has a locking piece, and the terminal fixing part has a locked part that can engage with the locking piece to restrict rotation of the terminal around the terminal hole, thereby restricting rotation of the terminal around the terminal hole, thereby achieving a stable electrical connection between the terminal and the terminal fixing part.

[0016] [4] In any one of the above [1] to [3], the second shielded electric wire may be arranged to pass through the outside of the cylindrical portion. According to this configuration, the second shielded electric wire is arranged to pass outside the tubular portion, and therefore the structure can be simpler than, for example, a configuration in which the second shielded electric wire is arranged to pass inside the tubular portion.

[0017] [5] In any one of [1] to [3] above, the second electric wire may be arranged to pass through the inside of the tubular portion, and the second braided member may be arranged to pass through the outside of the tubular portion.

[0018] According to this configuration, the second electric wire is arranged to pass through the inside of the tubular portion and the second braided member is arranged to pass through the outside of the tubular portion, so that, for example, the second electric wire is protected by the tubular portion. Also, for example, compared to a configuration in which the entire second shielded electric wire is arranged to pass outside the tubular portion, the area around the tubular portion can be made smaller.

[0019] [6] In any one of the above [1] to [3], the second shielded electric wire may be arranged to pass through the inside of the tubular portion. With this configuration, the second shielded electric wire is arranged to pass through the inside of the cylindrical portion, so that, for example, the second shielded electric wire is protected by the cylindrical portion. Also, for example, compared to a configuration in which at least a portion of the second shielded electric wire is arranged to pass outside the cylindrical portion, the area around the cylindrical portion can be made smaller.

[0020] [Details of the embodiments of the present disclosure] Specific examples of the present disclosure will be described below with reference to the drawings. In each drawing, for the convenience of explanation, some components may be exaggerated or simplified. Furthermore, the dimensional proportions of each part may differ from one drawing to another. Furthermore, the present invention is not limited to these examples, but is defined by the claims, and is intended to include all modifications within the meaning and scope equivalent to the claims.

[0021] (Overall configuration of the wire harness 10) 1, the wire harness 10 includes a first shielded electric wire 20, a second shielded electric wire 30, a terminal 40, a bracket 50, and a bundling member 60. The wire harness 10 is installed in a vehicle, for example, to electrically connect on-board devices provided in the vehicle.

[0022] (Configuration of the first shielded wire 20) The first shielded wire 20 has a first electric wire 21 and a tubular first braided member 22 that covers the outer periphery of the first electric wire 21. The first shielded wire 20 of this embodiment has two first electric wires 21.

[0023] (Configuration of the first electric wire 21) The first electric wire 21 has a first core wire 21a and a first insulating coating 21b that covers the outer periphery of the first core wire 21a. The first electric wire 21 is a so-called thick electric wire that is capable of carrying a large current.

[0024] The first core wire 21a is made of, for example, a twisted wire made by twisting together a plurality of conductive wires, a single core wire, etc. The first core wire 21a is made of, for example, a copper-based or aluminum-based metal material. The first core wire 21a of this embodiment has a cross-sectional shape that is a perfect circle.

[0025] The first insulating coating 21b covers the entire outer periphery of the first core wire 21a and is made of an insulating material such as a synthetic resin containing, as a main component, a polyolefin resin such as cross-linked polyethylene or cross-linked polypropylene.

[0026] (Configuration of first braided member 22) The first braided member 22 is formed by braiding a plurality of conductive wires into a tubular shape. The drawings schematically illustrate the braided wires of the first braided member 22. For example, a copper-based or aluminum-based metal material can be used as the material for the first braided member 22. The first braided member 22 of this embodiment covers the two first electric wires 21 together.

[0027] (Configuration of the second shielded wire 30) The second shielded wire 30 has a second electric wire 31 and a tubular second braided member 32 that covers the outer periphery of the second electric wire 31. The second shielded wire 30 of this embodiment has two second electric wires 31.

[0028] (Configuration of the second electric wire 31) The second electric wire 31 has a second core wire 31a and a second insulating coating 31b that covers the outer periphery of the second core wire 31a. The second electric wire 31 is thinner than the first electric wire 21 and is a so-called signal wire that can carry a small current.

[0029] The second core wire 31a is formed of, for example, a twisted wire made by twisting together a plurality of conductive wires, a single core wire, etc. The second core wire 31a is made of, for example, a metal material such as copper or aluminum. The second core wire 31a of this embodiment has a cross-sectional shape that is a perfect circle.

[0030] The second insulating coating 31b covers the entire outer periphery of the second core wire 31a and is made of an insulating material such as a synthetic resin containing a polyolefin resin, such as cross-linked polyethylene or cross-linked polypropylene, as a main component.

[0031] (Configuration of second braided member 32) The second braided member 32 is formed by braiding a plurality of conductive wires into a tubular shape. The drawings schematically illustrate the braided wires of the second braided member 32. The second braided member 32 can be made of, for example, a copper-based or aluminum-based metal material. The second braided member 32 of this embodiment has a tubular portion 32a that collectively covers the two second electric wires 31, and a ground wire 32b that is gathered from the end of the tubular portion 32a and extends separably from the second electric wires 31. The ground wire 32b is formed into a single conductor by being gathered from the end of the tubular portion 32a and twisted, for example, and can be bent in a direction different from the extending direction of the second electric wires 31.

[0032] (Configuration of terminal 40) Terminal 40 has a crimping portion 41, a connecting portion 42, and a locking piece 43. Crimping portion 41 is crimped to the end of ground wire 32b. This electrically connects terminal 40 to second braided member 32. Connecting portion 42 has a terminal hole 42a. Locking piece 43 extends and bends from connecting portion 42. Terminal 40 can be made of a metal material such as copper or aluminum.

[0033] (Configuration of bracket 50) The bracket 50 is made of a metal material and is fixed to the earth member 70 while the first braided member 22 and the second braided member 32 are electrically connected to each other.

[0034] More specifically, the bracket 50 has a tubular portion 51, a flange portion 52, and a fixing portion 53. Two first electric wires 21 are inserted into the tubular portion 51, and a first braided member 22 is fixed to the outer periphery thereof. In this embodiment, the first braided member 22 is arranged so that its end portion 22a covers the outer periphery of the tubular portion 51, and in this state, the outer periphery is fastened to the binding member 60, thereby fixing the first braided member 22 to the tubular portion 51. Note that the binding member 60 may be, for example, a crimp ring made of a metal material. In addition, the binding member 60 is schematically illustrated in the drawings.

[0035] The flange portion 52 extends radially outward from one end of the cylindrical portion 51. The fixing portion 53 extends in a flat plate shape while bending from a circumferential portion of the flange portion 52. A portion of the fixing portion 53 serves as a terminal fixing portion 54 to which the terminal 40 is fixed.

[0036] The terminal fixing portion 54 has a fixing hole 54a and a locked portion 54b that can engage with the locking piece 43 to restrict rotation of the terminal 40 around the terminal hole 42a. In this embodiment, the locked portion 54b is a through hole into which the locking piece 43 fits. The fixing portion 53 also has a fixed locking piece 55. The fixed locking piece 55 is bent and extends from a portion of the end of the fixing portion 53.

[0037] The grounding member 70 to which the bracket 50 is fixed is, for example, a part of the housing of an in-vehicle device or the vehicle body. The grounding member 70 has a screw hole 70a and an engaged groove 70b that can be engaged with the fixed engaging piece 55 to restrict rotation around the fixing hole 54a of the fixing portion 53.

[0038] The terminal 40 is fixed to the terminal fixing portion 54 by a bolt 80 that passes through the terminal hole 42a and the fixing hole 54a, and the bracket 50 is fixed to the grounding member 70 by the bolt 80. In other words, the terminal 40 and the bracket 50 are fixed to the grounding member 70 by the single bolt 80 that passes through the terminal hole 42a and the fixing hole 54a and is screwed into the screw hole 70a.

[0039] In this embodiment, the second shielded electric wire 30 is arranged to pass outside the tubular portion 51 of the bracket 50. More specifically, the second shielded electric wire 30 is arranged so that the second electric wire 31 and the second braided member 32 all pass outside the tubular portion 51 without passing inside the tubular portion 51.

[0040] (Operation of the embodiment) Next, the operation of the wire harness 10 configured as above will be described. The first shielded electric wire 20 has the first electric wire 21 inserted into the tubular portion 51 of the bracket 50, and the first braided member 22 fixed to the outer periphery of the tubular portion 51. The second shielded electric wire 30 has the second electric wire 31 disposed so as to pass outside the tubular portion 51, and the second braided member 32 fixed to the terminal fixing portion 54 of the bracket 50 via the terminal 40.

[0041] The bracket 50 is then fixed to the ground member 70. As a result, the first braided member 22 and the second braided member 32 are connected to the ground, and radiation of electromagnetic noise from the first electric wire 21 and the second electric wire 31 is suppressed.

[0042] (Effects of the embodiment) Next, the effects of the above embodiment will be described below. (1) The wire harness 10 includes a terminal 40 electrically connected to the second braided member 32. The bracket 50 has a tubular portion 51 through which the first electric wire 21 is inserted and to which the first braided member 22 is fixed on its outer periphery, and a terminal fixing portion 54 to which the terminal 40 is fixed. With this configuration, the first braided member 22 is directly fixed to the outer periphery of the tubular portion 51 of the bracket 50, and the second braided member 32 is fixed to the terminal fixing portion 54 of the bracket 50 via the terminal 40. This configuration can improve assembly workability by performing fixing work sequentially while suppressing an increase in the number of parts. That is, with this configuration, for example, an inefficient work of simultaneously positioning and fixing the first braided member 22 and the second braided member 32 to the tubular portion 51 does not occur.

[0043] (2) The terminal 40 is fixed to the terminal fixing portion 54 by a bolt 80 that passes through the terminal hole 42a of the terminal 40 and the fixing hole 54a of the terminal fixing portion 54, and the bracket 50 is fixed to the grounding member 70 by the bolt 80. In this configuration, the terminal 40 is fixed to the terminal fixing portion 54 and the bracket 50 is fixed to the grounding member 70 by a single bolt 80, so the number of parts can be reduced compared to a configuration in which they are fixed by separate bolts, for example.

[0044] (3) The terminal 40 has the locking piece 43, and the terminal fixing portion 54 has the locked portion 54b that can engage with the locking piece 43 to restrict rotation of the terminal 40 around the terminal hole 42a, thereby restricting rotation of the terminal 40 around the terminal hole 42a. Therefore, the terminal 40 and the terminal fixing portion 54 can be electrically connected stably.

[0045] (4) Since the second shielded electric wire 30 is arranged to pass through the outside of the tubular portion 51, the structure can be simpler than, for example, a configuration in which the second shielded electric wire 30 is arranged to pass through the inside of the tubular portion 51.

[0046] (Example of change) The above embodiment can be modified as follows: The above embodiment and the following modifications can be combined with each other within the scope of technical compatibility.

[0047] In the above embodiment, the second shielded electric wire 30 is arranged to pass through the outside of the tubular portion 51, but this is not limited thereto, and at least a portion of the second shielded electric wire 30 may be configured to pass through the inside of the tubular portion 51.

[0048] For example, it may be modified as shown in Fig. 2. In this example, the second electric wire 31 of the second shielded electric wire 30 is arranged to pass through the inside of the tubular portion 51, and the second braided member 32 is arranged to pass through the outside of the tubular portion 51.

[0049] In this example, the end 22a of the first braided member 22 has an insertion groove 22b formed by partially cutting away or separating a circumferential portion thereof, and the second electric wire 31 is arranged to pass through the inside of the tubular portion 51 by passing through the insertion groove 22b.

[0050] In this way, for example, the second electric wire 31 is protected by the cylindrical portion 51 together with the first electric wire 21. Furthermore, for example, compared to a configuration in which the entire second shielded electric wire 30 is arranged to pass outside the cylindrical portion 51, the area around the cylindrical portion 51 can be made smaller.

[0051] 3, the second shielded electric wire 30 in this example is arranged so that the second electric wire 31 and the second braided member 32 both pass through the inside of the tubular portion 51.

[0052] In this example, the end 22a of the first braided member 22 has an insertion groove 22b in which a portion in the circumferential direction is pulled away or cut away, resulting in a partially cut-out annular shape. The second shielded electric wire 30 is arranged to pass through the inside of the tubular portion 51 by passing through the insertion groove 22b.

[0053] In this way, for example, the second shielded electric wire 30 is protected by the cylindrical portion 51 together with the first electric wire 21. Furthermore, for example, compared to a configuration in which at least a portion of the second shielded electric wire 30 is arranged to pass outside the cylindrical portion 51, the area around the cylindrical portion 51 can be made smaller.

[0054] In the above embodiment, the locked portion 54b of the terminal fixing portion 54 of the bracket 50 is a through hole, but it may be changed to another shape as long as it can engage with the locking piece 43. For example, it may be changed to a locked portion 54c as shown in Fig. 3. This locked portion 54c is a recess cut out from the end of the fixing portion 53 so that the locking piece 43 fits into it.

[0055] In the above embodiment, the terminal 40 has the terminal hole 42a, but the terminal hole 42a may be a partially open U-shaped hole. Also, in the above embodiment, the terminal fixing portion 54 has the fixing hole 54a, but the fixing hole 54a may be a partially open U-shaped hole.

[0056] In the above embodiment, the terminal 40 is fixed to the terminal fixing portion 54 and the bracket 50 is fixed to the earthing member 70 by a single bolt 80, but this is not limited to this. For example, the terminals 40 and the bracket 50 may be fixed by separate bolts or other fixing structures.

[0057] In the above embodiment, the terminal 40 has the locking piece 43, and the terminal fixing portion 54 has the locked portion 54b that can engage with the locking piece 43 to restrict rotation of the terminal 40 around the terminal hole 42a, but this is not limiting. For example, rotation of the terminal 40 around the terminal hole 42a may be restricted by another structure, or rotation may not be restricted at all.

[0058] In the above embodiment, the first shielded electric wire 20 includes two first electric wires 21, but this is not limited to this. For example, the first shielded electric wire 20 may include only one first electric wire 21, or may include three or more first electric wires 21.

[0059] In the above embodiment, the second shielded electric wire 30 has two second electric wires 31, but this is not limited to this. For example, the second shielded electric wire 30 may have only one second electric wire 31, or may have three or more second electric wires 31.

[0060] In the above embodiment, the wire harness 10 includes one second shielded electric wire 30, but is not limited thereto and may include a plurality of second shielded electric wires 30. In this case, the wire harness 10 may include a terminal 40 connected to each of the second braided members 32 of the plurality of second shielded electric wires 30. In this case, the plurality of terminals 40 may be fixed to the terminal fixing portion 54 by a single bolt 80.

[0061] In the above embodiment, the first electric wire 21 is a so-called thick electric wire capable of carrying a large current, and the second electric wire 31 is a so-called signal wire thinner than the first electric wire 21 and capable of carrying a small current, but this is not limiting. For example, the first electric wire 21 and the second electric wire 31 may have the same thickness.

[0062] In the above embodiment, the second braided member 32 has an earth wire 32b that is bundled from the end of the tubular portion 32a and extends separably from the second electric wire 31, and the earth wire 32b is fixed to the crimping portion 41 of the terminal 40, but this is not limited to this.

[0063] For example, at least a portion of the ground wire 32b may be replaced with another conductive wire, that is, the second braided member 32 may be connected to the terminal via another conductive wire.

[0064] In the above embodiment, the bracket 50 has the fixed locking piece 55, and the grounding member 70 has the locked groove 70b that can engage with the fixed locking piece 55 to restrict rotation about the fixing hole 54a of the fixed part 53, but this is not limiting. For example, rotation about the fixing hole 54a of the fixed part 53 may be restricted by another structure, or rotation may not be restricted at all.

[0065] In the above embodiment, the earthing member 70 has a threaded hole 70a into which the bolt 80 is screwed, but this is not limited to this. For example, the threaded hole 70a may be a through hole, and the bolt 80 may be screwed into a separate nut.

[0066] In the above embodiment, the binding member 60 is made of a metal material, but is not limited to this and may be made of, for example, a resin material. For example, the binding member may be a cable tie having a flexible strip portion and a locking portion provided at the end of the strip portion in the longitudinal direction and locking the strip portion when it is passed through. [Explanation of symbols]

[0067] 10 Wire harness 20 First shielded wire 21 First Electric Wire 21a First core wire 21b First insulating coating 22 First braided member 22a end 22b Insertion groove 30 Second shielded wire 31 Second Electric Wire 31a Second core wire 31b Second insulating coating 32 Second braided member 32a Cylinder part 32b Ground wire 40 terminals 41 Crimping section 42 Connection 42a terminal hole 43 Locking piece 50 bracket 51 Cylindrical part 52 flange 53 Fixed part 54 Terminal fixing part 54a Fixing hole 54b Locked part 54c Locked part 55 Fixed locking piece 60 Binding member 70 Earthing member 70a screw hole 70b Locked groove 80 volts

Claims

1. a first shielded wire including a first wire and a cylindrical first braided member covering an outer periphery of the first wire; a second shielded wire including a second wire and a cylindrical second braided member covering an outer periphery of the second wire; a bracket that is fixed to an earth member and electrically connects the first braided member and the second braided member; A wire harness comprising: a terminal electrically connected to the second braided member; The bracket has a tubular portion through which the first electric wire is inserted and to which the first braided member is fixed on an outer periphery, and a terminal fixing portion to which the terminal is fixed. Wire harness.

2. The terminal has a terminal hole, The terminal fixing portion has a fixing hole, the terminal is fixed to the terminal fixing portion by a bolt passing through the terminal hole and the fixing hole; The bracket is fixed to the grounding member by the bolt. The wire harness according to claim 1 .

3. The terminal has a locking piece, The terminal fixing portion has a locked portion that can be engaged with the locking piece to restrict rotation of the terminal around the terminal hole. The wire harness according to claim 2 .

4. The second shield wire is arranged to pass through the outside of the cylindrical portion. The wire harness according to claim 1 .

5. the second electric wire is arranged to pass through the inside of the cylindrical portion, The second braided member is arranged to pass through the outside of the tubular portion. The wire harness according to claim 1 .

6. The second shielded wire is arranged to pass through the inside of the cylindrical portion. The wire harness according to claim 1 .

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