Wire harness

Abstract

To provide a wire harness capable of reducing a load applied to a fixing unit of an electric wire fixing member.SOLUTION: A wire fixing member 17 includes a holding unit for holding a wire having a size equal to or larger than 50sq, and a fixing unit 32 that is fixed to a vehicle by bolting. In the fixing unit 32, a cylindrical member 40 is provided inside a through hole 33 penetrating the fixing unit 32. The cylindrical member 40 includes a first hard cylindrical portion 41 having an insertion hole 44 through which a fastening bolt B is inserted and having higher rigidity than the fixing unit 32, and an elastic portion 43 having higher elasticity than the fixing unit 32. The elastic portion 43 is located between an outer peripheral surface of the first hard cylindrical portion 41 and an inner peripheral surface of the through hole 33.SELECTED DRAWING: Figure 4

Description

[Technical Field]

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

[0002] For example, Patent Document 1 describes a wire harness including electric wires and an electric wire fixing member that fixes the electric wires to a vehicle. The electric wire fixing member has a holding portion that holds the electric wires and a fixing portion that is fixed to the vehicle by bolting. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-45570 Summary of the Invention [Problem to be solved by the invention]

[0004] In the above-described wire harness, if the cross-sectional area of ​​the electric wires is large to accommodate high voltage, the weight of the electric wires becomes heavy, which may result in excessive load being applied to the fixing portion of the electric wire fixing member when the vehicle vibrates.

[0005] An object of the present disclosure is to provide a wire harness that can reduce the load applied to the fixing portion of the electric wire fixing member. [Means for solving the problem]

[0006] The wire harness of the present disclosure is a wire harness for a vehicle, and includes an electric wire member including an electric wire, a holding portion that holds the electric wire member, and an electric wire fixing member having a fixing portion that is fixed to the vehicle by bolting, wherein the size of the electric wire is 50 sq. or more, and the fixing portion has a tubular member provided inside a through hole that passes through the fixing portion, and the tubular member includes a hard tubular portion that has an insertion hole through which a fastening bolt is inserted and is more rigid than the fixing portion, and an elastic portion that has more elasticity than the fixing portion, and the elastic portion is located between the outer peripheral surface of the hard tubular portion and the inner peripheral surface of the through hole. [Effects of the Invention]

[0007] The wire harness of the present disclosure exhibits the effect of reducing the load applied to the fixing portion of the electric wire fixing member. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a schematic diagram of a vehicle equipped with a wire harness. [Figure 2] FIG. 2 is a perspective view of the wire harness according to the embodiment. [Figure 3] FIG. 3 is an enlarged plan view showing the vicinity of a fixing portion of an electric wire fixing member in the wire harness of the same embodiment. [Figure 4] FIG. 4 is a cross-sectional view taken along line 4-4 in FIG. [Figure 5] FIG. 5 is a perspective view of a tubular member in the wire harness of the same embodiment. [Figure 6] FIG. 6 is a cross-sectional view of a wire harness according to a modified example. DETAILED DESCRIPTION OF THE INVENTION

[0009] [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 for a vehicle, comprising: an electric wire member including an electric wire; a holding portion for holding the electric wire member; and an electric wire fixing member having a fixing portion fixed to a vehicle by bolting, wherein the size of the electric wire is 50 sq.m. or more; the fixing portion has a tubular member provided inside a through hole passing through the fixing portion; the tubular member has an insertion hole through which a fastening bolt is inserted, and the tubular member has a hard tubular portion having higher rigidity than the fixing portion, and an elastic portion having higher elasticity than the fixing portion, and the elastic portion is located between the outer peripheral surface of the hard tubular portion and the inner peripheral surface of the through hole.

[0010] This configuration allows the rigid cylindrical portion of the cylindrical member to receive the axial force of the bolt. The elastic portion included in the cylindrical member can prevent vehicle vibrations from being transmitted to the fixing portion of the electric wire fixing member. This reduces the load on the fixing portion. Therefore, it is possible to prevent damage to the fixing portion of an electric wire fixing member that holds heavy electric wires with a size of 50 sq. or more.

[0011] [2] The electric wire member is connected to a power unit including a motor for driving the vehicle. According to this configuration, the elastic portion of the cylindrical member can prevent vibrations from the power unit, which is a vibration generating source, from being transmitted to the fixing portion of the electric wire fixing member.

[0012] [3] The electric wire member electrically connects the power unit and the battery. According to this configuration, it is possible to reduce the load on the fixing portion of the electric wire fixing member that holds the electric wire member connecting the power unit, which is a vibration generating source, and the battery, which does not vibrate by itself.

[0013] [4] The electric wire fixing member is disposed inside a housing chamber that houses a power unit including a motor for driving the vehicle. With this configuration, the electric wire fixing member is more susceptible to vibrations from the power unit, which is a vibration generating source, and therefore the effect of reducing the load on the fixing portion by the elastic portion can be more significantly achieved.

[0014] [5] The size of the electric wire is 200 sq. or less. According to this configuration, it is possible to reduce the load on the fixing portion in the wire fixing member that holds the wire having a size of 50 sq or more and 200 sq or less.

[0015] [6] The hard cylindrical portion is made of metal, and the elastic portion is made of rubber. With this configuration, the axial force of the bolt can be received by the hard cylindrical portion made of metal, and the elastic portion made of rubber can effectively suppress the transmission of vehicle vibrations to the fixing portion of the electric wire fixing member.

[0016] [7] The elastic portion has a cylindrical shape surrounding the hard cylindrical portion. According to this configuration, the cylindrical elastic portion can suitably suppress the transmission of vehicle vibrations to the fixing portion of the electric wire fixing member.

[0017] [8] The hard cylindrical portion is a first hard cylindrical portion, and the tubular member has a second hard cylindrical portion having higher rigidity than the elastic portion, and the second hard cylindrical portion is arranged between the elastic portion and the inner surface of the through hole.

[0018] According to this configuration, the outer peripheral surface of the tubular member can be formed by the second rigid tubular portion. Therefore, compared to when the outer peripheral surface of the tubular member is formed by the elastic portion, it is possible to reduce friction when inserting the tubular member into the through-hole of the fixing portion. As a result, it is possible to improve the ease of assembling the tubular member.

[0019] [Details of the embodiments of the present disclosure] Specific examples of the wire harness of the present disclosure will be described below with reference to the drawings. In each drawing, for the sake of convenience of explanation, some of the configuration may be exaggerated or simplified. Furthermore, the dimensional proportions of each part may differ from one drawing to another.

[0020] The term "cylindrical" as used in this specification does not only refer to a cylindrical object having a continuous wall formed around the entire circumference, but also includes a cylindrical object formed by combining multiple parts, or a C-shape having a notch in a portion of the circumference. The term "cylindrical" also includes circular, elliptical, and polygonal shapes with sharp or rounded corners.

[0021] (Configuration of vehicle 10) 1 is, for example, a hybrid vehicle, an electric vehicle, etc. Vehicle 10 includes a power plant 11 that generates power to propel vehicle 10, a battery 12 that supplies power to power plant 11, and a charging inlet 13.

[0022] The power plant 11 includes, for example, a driving motor 11a that serves as a power source for driving the vehicle, and a converter 11b electrically connected to the motor 11a. The converter 11b is, for example, an inverter. The converter 11b generates AC power from DC power of the battery 12 and supplies the AC power to the motor 11a. The battery 12 is, for example, a high-voltage battery capable of supplying a voltage of several hundred volts. The battery 12 is, for example, a secondary battery such as a lithium-ion battery. An external power supply device (not shown) can be connected to the charging inlet 13. The power supplied by the external power supply device connected to the charging inlet 13 is supplied to the battery 12 via the power plant 11 to charge the battery 12.

[0023] The power unit 11 is disposed, for example, inside a storage compartment 10a set at the front side of the vehicle 10. If the vehicle 10 is a hybrid vehicle, the storage compartment 10a is, for example, an engine compartment. The battery 12 is disposed, for example, near the underfloor in the center of the vehicle 10 in the longitudinal direction. The charging inlet 13 is disposed, for example, at the front end of the vehicle 10.

[0024] The vehicle 10 includes a first wire harness 14 that electrically connects the power unit 11 and the battery 12, and a second wire harness 15 that electrically connects the power unit 11 and the charging inlet 13.

[0025] The first wire harness 14 includes an electric wire member 16 and an electric wire fixing member 17 for fixing the electric wire member 16 to the vehicle 10. One end of the electric wire member 16 is connected to the converter 11b of the power unit 11. The other end of the electric wire member 16 is connected to the battery 12.

[0026] The second wire harness 15 includes an electric wire member 18. One end of the electric wire member 18 is connected to the converter 11b of the power unit 11. The other end of the electric wire member 18 is connected to the charging inlet 13.

[0027] (Configuration of the first wire harness 14) 2, the electric wire member 16 of the first wire harness 14 includes, for example, a plurality of electric wires 21 and an exterior member 22 that collectively surrounds the plurality of electric wires 21. The electric wire member 18 of the second wire harness 15 also has substantially the same configuration as the electric wire member 16.

[0028] Each electric wire 21 is a coated electric wire having a conductive core wire 23 and an insulating coating 24 that surrounds the outer periphery of the core wire 23 and has insulating properties. Each electric wire 21 is, for example, a high-voltage wire that can handle high voltages and large currents. In each electric wire 21, the size of the core wire 23 is not less than 50 sq and not more than 200 sq. The core wire 23 is made of a copper-based or aluminum-based metal material.

[0029] The exterior member 22 is formed, for example, in a cylindrical shape. The electric wires 21 are inserted into the exterior member 22. The exterior member 22 has a function of protecting the electric wires 21 from, for example, flying objects and water droplets. The exterior member 22 is, for example, flexible and can be easily bent. Examples of the flexible exterior member 22 include a corrugated tube made of resin and a waterproof cover made of rubber.

[0030] The exterior member 22 of this embodiment is a corrugated tube made of resin and having a bellows shape in which the diameter repeatedly increases and decreases in the length direction of the exterior member 22. That is, the exterior member 22 of this embodiment has a bellows structure in which large diameter portions and small diameter portions are alternately provided in a row along the length direction of the exterior member 22. Examples of materials that can be used for the exterior member 22 include synthetic resins such as polyolefin, polyamide, polyester, and ABS resin.

[0031] (Configuration of electric wire fixing member 17) The electric wire fixing member 17 has a fixing member main body 30. The fixing member main body 30 has a holding portion 31 that holds the electric wire member 16, and a fixing portion 32 that is fixed to the vehicle 10 by bolting. The fixing member main body 30 is, for example, an injection-molded product made of a synthetic resin material. The fixing member main body 30 can be made of synthetic resin such as polypropylene or polyamide.

[0032] The holding portion 31 holds the exterior member 22 so as to restrict movement of the exterior member 22 in the length direction and in a direction perpendicular to the length direction. The holding portion 31 surrounds the outer periphery of the exterior member 22, for example.

[0033] 2 and 3, the fixing portion 32 is fastened to a bracket 10b on the vehicle 10 side by a bolt B. The bracket 10b is supported by a housing of the power unit 11, for example.

[0034] (Configuration of fixed portion 32) 4, the fixed portion 32 has a tubular member 40 provided inside a through-hole 33 that penetrates the fixed portion 32. The tubular member 40 is assembled, for example, by being inserted into the through-hole 33 formed in the fixed portion 32. Alternatively, a portion of the tubular member 40 is embedded in a resin portion of the fixed portion 32 by, for example, insert molding.

[0035] 4 and 5, the cylindrical member 40 has a first hard cylindrical portion 41, a second hard cylindrical portion 42, and an elastic portion 43. The cylindrical member 40 has a configuration in which the first hard cylindrical portion 41, the elastic portion 43, and the second hard cylindrical portion 42 are layered in this order from the inner peripheral side to the outer peripheral side. That is, the elastic portion 43 is interposed between the first hard cylindrical portion 41 and the second hard cylindrical portion 42. The outer peripheral surface of the second hard cylindrical portion 42 is in contact with the inner peripheral surface of the through hole 33.

[0036] The first hard cylindrical portion 41 and the second hard cylindrical portion 42 are formed from a material that is more rigid than the synthetic resin that forms the fixed portion 32. For example, aluminum-based metals or iron-based metals such as stainless steel can be used as the material for the first hard cylindrical portion 41 and the second hard cylindrical portion 42. The first hard cylindrical portion 41 and the second hard cylindrical portion 42 may be formed from the same material or different materials.

[0037] The elastic portion 43 has a cylindrical shape and surrounds the outer periphery of the first hard cylindrical portion 41. The elastic portion 43 is located between the outer periphery of the first hard cylindrical portion 41 and the inner periphery of the through hole 33. The inner periphery of the elastic portion 43 contacts the outer periphery of the first hard cylindrical portion 41. The outer periphery of the elastic portion 43 contacts the inner periphery of the second hard cylindrical portion 42.

[0038] The elastic portion 43 is formed of a material having higher elasticity than the synthetic resin that constitutes the fixed portion 32. Examples of materials that can be used for the elastic portion 43 include silicone rubber, urethane rubber, acrylic rubber, nitrile rubber, butyl rubber, and ethylene propylene rubber.

[0039] The first hard cylindrical portion 41 has an insertion hole 44 through which the bolt B is inserted. The insertion hole 44 has, for example, an elongated hole shape extending along the length direction of the electric wire member 16. Therefore, the position of the electric wire fastening member 17 in the length direction of the electric wire member 16 can be adjusted.

[0040] The first hard cylindrical portion 41 has a flange portion 41a extending outward from one end in the axial direction of the cylindrical member 40. The axial direction of the cylindrical member 40 coincides with the penetration direction of the insertion hole 44. The flange portion 41a is provided, for example, at the end of the first hard cylindrical portion 41 opposite to the end that comes into contact with the bracket 10b.

[0041] The elastic portion 43 has a flange portion 43a extending outward from one end portion in the axial direction of the cylindrical member 40. The flange portion 43a is in contact with the flange portion 41a of the first hard cylindrical portion 41 in the axial direction of the cylindrical member 40.

[0042] The second hard cylindrical portion 42 has a flange portion 42a extending from one end portion in the axial direction of the cylindrical member 40 toward the outer periphery. The flange portion 42a is in contact with the flange portion 43a of the elastic portion 43 in the axial direction of the cylindrical member 40. The flange portion 43a of the elastic portion 43 is interposed between the flange portion 41a of the first hard cylindrical portion 41 and the flange portion 42a of the second hard cylindrical portion 42 in the axial direction of the cylindrical member 40. The flange portion of the second hard cylindrical portion 42 42a is in contact with the fixed portion 32 in the axial direction of the cylindrical member 40.

[0043] The first hard cylindrical portion 41 has a protruding portion 45 at the end opposite to the flange portion 41a. The protruding portion 45 protrudes outward in the axial direction of the cylindrical member 40 beyond the end of the elastic portion 43 and the end of the second hard cylindrical portion 42. The protruding portion 45 is configured to be able to come into contact with the bracket 10b in the axial direction of the cylindrical member 40.

[0044] The protruding portion 45 and flange portion 41a of the first hard cylindrical portion 41 respectively constitute one end and the other end in the axial direction of the cylindrical member 40. As a result, when the fixing portion 32 including the cylindrical member 40 and the bracket 10b are fastened with the bolt B and the nut N, for example, the head of the bolt B contacts the protruding portion 45 and the nut N contacts the flange portion 41a. In this way, the cylindrical member 40 is configured so that the axial force of the bolt B and the nut N is received by the first hard cylindrical portion 41.

[0045] The operation of this embodiment will be described. For example, vibrations generated in the power unit 11 when the motor 11a is driven are transmitted to the cylindrical member 40 of the electric wire fixing member 17 via the bracket 10b. At this time, the vibrations transmitted from the bracket 10b to the first hard cylindrical portion 41 are absorbed by the elastic portion 43 provided between the first hard cylindrical portion 41 and the fixed portion 32. This suppresses vibrations of the fixed portion 32 and the holding portion 31. When the electric wire 21 is heavy due to compatibility with high voltage, if the vibrations of the holding portion 31 that holds the electric wire member 16 including the electric wire 21 become large, there is a risk that an excessive load will be applied to the fixed portion 32 fixed to the bracket 10b. In this regard, in the present embodiment, the vibrations of the holding portion 31 are suppressed by the elastic portion 43, thereby reducing the load applied to the fixed portion 32 during vibrations.

[0046] The effects of this embodiment will be described. (1) The tubular member 40 includes a first hard tubular portion 41 having an insertion hole 44 through which a fastening bolt B is inserted and having higher rigidity than the fixed portion 32, and an elastic portion 43 having higher elasticity than the fixed portion 32. The elastic portion 43 is located between the outer peripheral surface of the first hard tubular portion 41 and the inner peripheral surface of the through hole 33 of the fixed portion 32.

[0047] According to this configuration, the first hard cylindrical portion 41 of the cylindrical member 40 can be configured to receive the axial force of the bolt B. The elastic portion 43 included in the cylindrical member 40 can prevent vibrations of the vehicle 10 from being transmitted to the fixing portion 32 of the electric wire fixing member 17. This reduces the load on the fixing portion 32. Therefore, it is possible to prevent damage to the fixing portion 32 of the electric wire fixing member 17 that holds a heavy electric wire 21 having a size of 50 sq. or more.

[0048] (2) The electric wire member 16 is connected to the power unit 11 including the motor 11a for driving the vehicle. With this configuration, the elastic portion 43 of the cylindrical member 40 can prevent vibrations from the power unit 11, which is a vibration generating source, from being transmitted to the fixing portion 32 of the electric wire fixing member 17.

[0049] (3) The electric wire member 16 electrically connects the power unit 11 and the battery 12. With this configuration, it is possible to reduce the load on the fixing portion 32 of the electric wire fixing member 17 that holds the electric wire member 16 connecting the power unit 11, which is a vibration generating source, and the battery 12, which does not vibrate by itself.

[0050] (4) Since the electric wire fixing member 17 is disposed inside the accommodation chamber 10a that accommodates the power unit 11, the electric wire fixing member 17 is more susceptible to vibrations of the power unit 11. Therefore, the effect of reducing the load on the fixing portion 32 by the elastic portion 43 can be more significantly obtained.

[0051] (5) The size of the electric wire 21 is 200 sq or less. With this configuration, it is possible to reduce the load on the fixing portion 32 of the electric wire fixing member 17 that holds the electric wire 21 having a size of 50 sq or more and 200 sq or less.

[0052] (6) The first hard cylindrical portion 41 is made of metal. The elastic portion 43 is made of rubber. This configuration allows the first hard cylindrical portion 41, which is made of metal, to bear the axial force of the bolt B. The elastic portion 43, which is made of rubber, also makes it possible to effectively suppress vibrations of the vehicle 10 from being transmitted to the fixing portion 32 of the electric wire fixing member 17.

[0053] (7) The elastic portion 43 has a cylindrical shape that surrounds the first hard cylindrical portion 41. According to this configuration, the cylindrical elastic portion 43 can effectively suppress transmission of vibrations of the vehicle 10 to the fixing portion 32 of the electric wire fixing member 17.

[0054] (8) The tubular member 40 has a second hard tubular portion 42 that is more rigid than the elastic portion 43. The second hard tubular portion 42 is disposed between the elastic portion 43 and the inner circumferential surface of the through hole 33. With this configuration, the outer circumferential surface of the tubular member 40 can be formed by the second hard tubular portion 42. Therefore, compared to when the outer circumferential surface of the tubular member 40 is formed by the elastic portion 43, it is possible to reduce friction when inserting the tubular member 40 into the through hole 33 of the fixing portion 32. As a result, it is possible to improve the ease of assembling the tubular member 40.

[0055] [Example of change] This embodiment can be modified as follows: This embodiment and the following modifications can be combined and implemented within the scope of technical compatibility.

[0056] As shown in Fig. 6, the second hard cylindrical portion 42 may be omitted from the cylindrical member 40 of the above embodiment. In the cylindrical member 40 shown in Fig. 6, the elastic portion 43 forms the outer peripheral surface of the cylindrical member 40. That is, the outer peripheral surface of the elastic portion 43 contacts the inner peripheral surface of the through hole 33 of the fixing portion 32. In addition, the flange portion 43a of the elastic portion 43 contacts the fixing portion 32 in the axial direction of the cylindrical member 40.

[0057] Even with this configuration, it is possible to reduce the load applied to the fixed portion 32 by the elastic portion 43. Furthermore, according to the cylindrical member 40 shown in FIG.

[0058] The elastic portion 43 is not limited to a configuration having a continuous peripheral wall along the circumferential direction of the first hard cylindrical portion 41, but may be configured such that multiple elastic portions 43 are scattered along the circumferential direction of the first hard cylindrical portion 41.

[0059] The shape of the cylindrical member 40 as viewed in the axial direction is not limited to a shape that is long in the length direction of the electric wire member 16, but may be changed to, for example, a circular shape. The size of the core wire 23 may be set to be larger than 200 sq.

[0060] The electric wire fixing member 17 may be disposed in a location other than the accommodation compartment 10a of the vehicle 10. In the above embodiment, the wire fixing member 17 including the tubular member 40 is used to fix the first wire harness 14 that connects the power unit 11 and the battery 12. However, this is not limited to this, and the wire fixing member 17 may be used to fix, for example, the second wire harness 15 that connects the power unit 11 and the charging inlet 13. Furthermore, the wire fixing member 17 may be used to fix a wire harness other than the first wire harness 14 and the second wire harness 15 that are connected to the power unit 11. For example, the wire fixing member 17 may be used to fix a wire harness that directly connects the charging inlet 13 and the battery 12.

[0061] In the above embodiment, the present invention is applied to a vehicle 10 such as a hybrid vehicle or an electric vehicle that has a motor 11a for driving the vehicle. However, the present invention may also be applied to a vehicle that does not have a motor 11a for driving the vehicle.

[0062] The embodiments and modifications disclosed herein are illustrative in all respects, and the present invention is not limited to these examples. That is, the scope of the present invention is defined by the claims, and it is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0063] 10 vehicles 10a Containment Cell 10b Bracket 11 Power plant 11a motor 11b Converter 12 Battery 13 Charging inlet 14 First wire harness (wire harness) 15 Second wire harness 16 Electrical wiring components 17 Wire fixing member 18 Electrical wiring components 21 Electric wire 22 Exterior materials 23 core wire 24 Insulation coating 30 Fixing member body 31 Holding part 32 Fixed part 33 Through hole 40 Cylindrical member 41 First hard cylinder part 41a Flange 42 Second hard cylinder part 42a Flange 43 Elastic part 43a Flange 44 Insertion hole 45 Protrusion B Bolt N nut

Claims

1. A wire harness for a vehicle, an electric wire member including an electric wire; an electric wire fixing member having a holding portion that holds the electric wire member and a fixing portion that is fixed to a vehicle by bolting, The size of the electric wire is 50 sq or more, The fixing portion has a through hole formed therein and a cylindrical member disposed therein, the tubular member includes a hard tubular portion having an insertion hole through which a fastening bolt is inserted and having higher rigidity than the fixing portion, and an elastic portion having higher elasticity than the fixing portion, the elastic portion is located between an outer peripheral surface of the hard cylindrical portion and an inner peripheral surface of the through hole, The hard cylindrical portion is a first hard cylindrical portion, the cylindrical member has a second hard cylindrical portion having higher rigidity than the elastic portion, The second hard cylindrical portion is disposed between the elastic portion and the inner circumferential surface of the through hole. Wire harness.

2. The electric wire member is connected to a power unit including a motor for driving the vehicle. The wire harness according to claim 1 .

3. The electric wire member electrically connects the power unit and the battery. The wire harness according to claim 2 .

4. The electric wire fixing member is disposed inside an accommodation chamber that accommodates a power unit including a motor for driving the vehicle. The wire harness according to any one of claims 1 to 3.

5. The size of the electric wire is 200 sq or less. The wire harness according to any one of claims 1 to 4.

6. The hard cylindrical portion is made of metal, The elastic portion is made of rubber. The wire harness according to any one of claims 1 to 5.

7. The elastic portion has a cylindrical shape surrounding the hard cylindrical portion. The wire harness according to any one of claims 1 to 6.

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