JP5629799B2 - Body underfloor wire harness protective member - Google Patents

Description

The present invention relates to a wire harness that is routed under a vehicle body floor that is outside a vehicle body frame, and more particularly to a protective member for a vehicle body floor wire harness that includes a plurality of high-voltage wires and a protective member that protects the high-voltage wires.

  The wire harness disclosed in the following Patent Document 1 includes three high-voltage wires and three metal protection pipes for storing and protecting the three high-voltage wires one by one. . The high-voltage electric wire is provided to connect a motor mounted on the front side of the vehicle and an inverter mounted on the middle or rear side of the vehicle.

  The wire harness is routed through the vehicle body under the vehicle body frame. For this reason, the metal protection pipe is formed so as to be able to protect the high-voltage electric wire from stone jumping and water splashing. The metal protection pipe has rigidity to protect the high-voltage electric wire from stone splashing and water splashing and prevent the high-voltage electric wire from being bent, and also has an electromagnetic shielding function because it is made of metal.

  A wire harness is manufactured by inserting a high-voltage electric wire through a straight metal protection pipe, performing this for three wires, and then bending the metal protection pipe along the wiring path of the wire harness under the floor of the vehicle body. ing. After the wire harness is manufactured at the harness manufacturer's factory as described above, the wire harness is transported to the automobile manufacturer's assembly factory and assembled at a predetermined position of the vehicle, thereby completing the routing.

  When the wire harness is transported, it is necessary to secure a sufficient space for each wire harness so that the wire harnesses do not come into contact with each other during the transport and are not deformed. In addition, since the metal protective pipe is bent three-dimensionally, it is necessary to secure a three-dimensional space. If these space securing is regarded as a problem, it is known that the wire harness disclosed in Patent Document 2 below is suitable for solving this problem.

  The wire harness disclosed in Patent Document 2 below is configured to include three high-voltage electric wires and a metal protection pipe for collectively accommodating and protecting the three high-voltage electric wires. The high voltage electric wire is provided for connecting devices such as an inverter, a battery, and a motor. The metal protection pipe is a metal pipe member having a circular cross section, and spiral peaks and grooves are formed at a constant pitch on the outer periphery and the inner periphery. In other words, the metal protective pipe is processed into a waveform having a shape in which the diameter alternately increases and decreases along the axial direction. The corrugated processing is performed over almost the entire length of the metal protective pipe (attachment members are provided at both ends of the metal protective pipe, and the corrugated processing is applied to the other portions). The metal protection pipe is made of metal and has an electromagnetic shielding function.

  According to the following Patent Document 2, the metal protective pipe is configured such that, during bending deformation, the inner corrugation pitch is narrowed and the outer corrugation pitch is widened, and this wall thickness changes extremely with deformation. It is formed so as not to be damaged. The metal protection pipe can be freely bent and deformed manually while maintaining a cylindrical shape of the same diameter, and has a predetermined rigidity so that the shape after bending deformation can be maintained. .

  The three high-voltage wires that are housed together in such a metal protection pipe are housed in a pile shape (a state in which a substantially equilateral triangle is drawn when the center of the wire is tied) in the metal protection pipe. Has been. The high-voltage electric wires that are stacked are arranged at the center position of the metal protection pipe and are arranged so as to be separated from the inner surface of the pipe by a predetermined distance.

  Since the wire harness disclosed in the following Patent Document 2 can be bent and deformed freely by hand, the metal protection pipe is transported from the harness manufacturer's factory to the automobile manufacturer's assembly factory. The pipe can be made almost straight or folded in a two-dimensional direction. That is, the space can be secured more easily than the wire harness disclosed in Patent Document 1 below.

The wire harness disclosed in the following Patent Document 2 is assembled by being bent or extended along a routing route for a vehicle after being transported to an assembly factory of an automobile manufacturer.
JP 2004-224156 A JP 2007-66825 A

  In the wire harness disclosed in Patent Document 2, the wire harness can be conveyed to an assembly factory of an automobile manufacturer after being folded in a two-dimensional direction. Therefore, it is certain that it is easier to secure a space during conveyance than the wire harness disclosed in Patent Document 1. However, the wire harness disclosed in Patent Document 2 (hereinafter simply abbreviated as “wire harness”) has several problems.

  That is, the first problem is that the metal protection pipe is bendable and has a circular cross-section, so if the folding direction is not specified, it is a suitable shape, but the folding direction must be specified. When there is, it is difficult for an operator to grasp the folding direction accurately and work, and this is a problem.

  The second problem is that the metal protection pipe has a circular cross-section and is corrugated over almost the entire length. Is bad (stability is poor), and this is a problem. In addition, since the waveform processing is point contact with the vehicle body floor, this point contact portion is easily worn away, which is also a problem.

  The third problem is that the metal protective pipe has a circular cross section and has a relatively large diameter such that the inner surface of the pipe is separated by a predetermined distance from the three high-voltage wires located at the center of the pipe. Therefore, when you look at the assembled state along the bottom of the car body, the distance to the ground will be short (near), and it can be said that it is a disadvantageous shape from the viewpoint of wire protection, which is a problem Yes.

  As a fourth problem, since the metal protection pipe is made of metal, there is a limit to reducing the weight, which is a problem. In addition, for example, when leakage occurs in the high-voltage electric wire in the metal protection pipe, a large current may flow over the entire length of the metal protection pipe, which is also a problem.

  As a fifth problem, since the metal protective pipe has a predetermined rigidity, there is a risk that it is difficult to handle by this rigidity, and this is a problem (the shape after bending deformation can be maintained). The advantage becomes a habit).

  In addition, since the three high-voltage electric wires are located in the center of the pipe of the metal protection pipe and are separated from the inner surface of the pipe, the wire harness has a large gap between the high-voltage electric wire and the inner surface of the pipe. It has a structure. Therefore, if the pipe material is not considered, it can be said that it has a structure that is relatively weak against external force (for example, when a structure that is strong against external force is used, it may be possible to add a constituent member. Will be expensive).

This invention is made | formed in view of an above-described situation, and makes it a subject to provide the wire harness which can aim at the improvement of workability | operativity, stability, durability, safety | security, etc. It is another object of the present invention to provide a protective member for a vehicle body underfloor wire harness that is favorable in terms of cost.

In order to solve the above-mentioned problems, the protective member for a vehicle body underfloor wire harness according to the present invention according to claim 1 passes from the vehicle interior front side of the hybrid vehicle or electric vehicle through the vehicle body floor below the vehicle body frame to the vehicle interior rear side. In the protective member of the vehicle body underfloor wire harness that protects the plurality of high-voltage wires connecting the battery and the inverter,
The protective member is installed beside a lean hose provided on the vehicle body frame so as to protrude from the underside of the vehicle body floor toward the ground, and is formed in a shape that is lower than the lean hose ,
The protective member is further provided with a low-voltage electric wire, and the low-voltage electric wire is inserted into the high-voltage electric wire in a horizontal row .

According to the present invention, the protection member for the underbody floor of the vehicle is characterized among the protection members composed of a plurality of types of separate parts. That is, since the vehicle body underfloor protection member is made of synthetic resin, it is possible to reduce the weight as compared with metal. The weight reduction also facilitates the handling of the wire harness itself. Further, since the vehicle body underfloor protection member is made of an insulating synthetic resin, a large current does not flow therethrough, and as a result, safety can be improved. Further, the vehicle body underfloor protection member is installed beside the lean hose, so that a strong structure can be obtained by the lean hose without adding a component member. Moreover, since the vehicle body underfloor protective member has a lower height than the lean hose, it is hidden in this dead space when installed beside the lean hose. Therefore, it becomes possible to make it harder to damage.
Moreover, according to this invention, it becomes a wire harness which has a low voltage circuit while having a high voltage circuit. According to the present invention, it is possible to promote modularization by integrating a low voltage circuit that connects a desired device extending from the front side to the rear side inside the vehicle.

A protective member for a vehicle body underfloor wire harness according to a second aspect of the present invention is the wire harness according to the first aspect, wherein the protective member is formed of a flat tube made of a synthetic resin having a non-circular cross-sectional insulating property. It is characterized in that the.

According to this invention, since it is a flat type tube, a bending direction can also be controlled. Therefore, the operator can easily grasp the bending direction, and as a result, the workability can be improved. In addition, the underbody protection member is a bellows-like flat tube with a top surface that can serve as an underfloor installation surface, so it is possible to ensure stability when assembled along the underbody floor. become.

Protection member body under floor wire harness of the present invention according to claim 3, in the protection member body under floor wire harness according to claim 1 or claim 2, the protective member, along the axial direction of the member, independent The crests and troughs in the circumferential direction of the member are alternately and continuously formed, and the crests are formed in a bellows shape having a top surface that can serve as an underfloor installation surface .

According to the present invention, the protective member of the underbody wire harness of the vehicle body is accordion-like and can be bent easily, and further, since it is a flat tube, the bending direction can be restricted. Therefore, the operator can easily grasp the bending direction, and as a result, the workability can be improved. In addition, since the protective member of the underbody wire harness is a bellows-like and flat tube with a top surface that can serve as an underfloor installation surface, it is necessary to ensure stability when assembled along the underside of the vehicle body. Is possible. Further, since the protective member of the underbody wire harness has a top surface that can be an underfloor installation surface, it comes into surface contact with the underside of the vehicle body, and is less likely to wear out when compared with point contact or line contact. Therefore, durability can be improved.

A protective member for a vehicle body underfloor wire harness according to a fourth aspect of the present invention is the protective member for a vehicle body underfloor wire harness according to any one of claims 1 to 3, wherein the high-voltage electric wire has a substantially rectangular cross section in the conductor shape. A flat high-voltage electric wire comprising a flat conductor or a conductor having a shape in which a plurality of strands or stranded wires are arranged to form a substantially flat cross section .

According to the present invention, when the conductor shape is flat so as to have the same conductor cross-sectional area as that of the conductor having a circular cross section, the high-voltage electric wires arranged in a horizontal row can be made compact. Since the underbody protection member is formed according to the state in which the high-voltage electric wires are arranged in a horizontal row, it is possible to reduce the size of the wire harness itself by using a flat high-voltage electric wire. By downsizing, it becomes possible to make the shape easy to hide in the dead space beside the lean hose. Therefore, it becomes more difficult to damage, and it becomes possible to further ensure the protection of the high-voltage electric wire. By downsizing, it is possible to easily secure a space when the wire harness is conveyed.

The protection member for a vehicle underfloor wire harness according to a fifth aspect of the present invention is the protection member for a vehicle underfloor wire harness according to any one of the first to fourth aspects, wherein the protection member is fixed to the vehicle underfloor. It is characterized in that a separate fixing member is provided .

According to the present invention, the protection member of the vehicle body underfloor wire harness is fixed to the vehicle body floor by the fixing member. By using the fixing member, it is not necessary to make the shape of the protective member of the vehicle body under-floor wire harness complicated for fixing. Therefore, it is possible to reduce the design man-hours and improve the manufacturability.

According to the first aspect of the present invention, the workability, stability, durability, safety, and the like can be improved as compared with the prior art due to the characteristics of the protective member of the vehicle body underfloor wire harness. . In addition, according to the present invention, by using the lean hose as a protective member, it is possible to suppress the addition of the constituent members, and it is possible to reduce the cost and weight.
Further, according to the present invention described in claim 1, when the conductor shape is made flat so as to have the same conductor cross-sectional area as the conductor having a circular cross section, the high-voltage electric wires arranged in a horizontal row are made compact. In addition, by integrating the high-voltage circuit and the low-voltage circuit into a module, for example, it is possible to improve workability in an assembly factory of an automobile manufacturer and to secure space in the vehicle.

According to the second aspect of the present invention , the wire harness itself can be reduced in size by forming the protective member for the underbody wire harness with a flat tube made of synthetic resin having a non-circular cross-sectional insulating property. Therefore, the space can be easily secured during the conveyance .

According to the third aspect of the present invention, the bellows is easy to bend, the workability can be improved, the surface contact is made to the underside of the vehicle body, and it is worn out when compared with point contact or line contact. This makes it difficult to improve durability .

According to the present invention described in claim 4 , it is possible to reduce the size of the wire harness itself, thereby making it difficult to damage and making it easy to secure a space during transportation.

According to the fifth aspect of the present invention, there is an effect that the shape of the vehicle body underfloor protection member can be simplified by using the fixing member.

It is a typical lineblock diagram showing one embodiment of a wire harness of the present invention. It is a figure which shows the protection member for vehicle body floors, and a lean hose, (a) is a principal part enlarged view when a vehicle body floor floor is seen from the ground (a part cross section is included), (b) is AA of (a). It is line sectional drawing. It is a typical figure showing a flow from wire harness manufacture to vehicle assembly, (a) is a figure of a wire harness immediately after manufacture, (b) is a figure of a wire harness in a state of being housed and transported in a general purpose return box, (C) is a figure of the wire harness immediately before vehicle assembly, (d) is a figure of the wire harness after vehicle assembly. It is typical sectional drawing for demonstrating the difference with this invention of a cross-sectional non-circular shape, and the comparative example of a cross-sectional circular shape. It is sectional drawing which shows other one Embodiment of the wire harness of this invention, (a) is a figure which shows the case where there are two high voltage electric wires, (b) is the figure which shows the case where there are three high voltage wires, c) is a diagram as a comparative example. It is sectional drawing which shows another one Embodiment of the wire harness of this invention, (a) is a figure which shows the 1st example at the time of setting it as a flat type high voltage electric wire, (b) is a flat type high voltage electric wire. (C) is a figure which shows the 3rd example at the time of setting it as a flat type high voltage electric wire.

  Hereinafter, description will be given with reference to the drawings. FIG. 1 is a schematic configuration diagram showing an embodiment of a wire harness of the present invention. FIG. 2 is a diagram showing a vehicle body underfloor protection member and a lean hose. FIG. 2A is an enlarged view of a main part (including a partial cross section) when the vehicle body underfloor is viewed from the ground, and FIG. ) Is a cross-sectional view taken along line AA of (a). 3 is a schematic diagram showing the flow from the production of the wire harness to the assembly of the vehicle. FIG. 3 (a) is a diagram of the wire harness immediately after production, and FIG. 3 (b) is housed in a general purpose return box. FIG. 3C is a diagram of the wire harness in a state of being transported, FIG. 3C is a diagram of the wire harness just before the vehicle assembly, and FIG. 3D is a diagram of the wire harness after the vehicle assembly.

  The wire harness of the present invention is intended for ones that are routed to a hybrid vehicle or an electric vehicle. In the following description, an example in a hybrid vehicle will be described (even in the case of an electric vehicle, the configuration, structure, and effects of the wire harness of the present invention are basically the same).

  In FIG. 1, reference numeral 1 indicates a hybrid vehicle. The hybrid vehicle 1 is a vehicle driven by mixing two powers of an engine 2 and a motor 3, and the motor 3 is supplied with electric power from a battery 5 through an inverter 4. In this embodiment, the engine 2, the motor 3, and the inverter 4 are mounted on the front side 6 of the vehicle where there are front wheels and the like. The battery 5 is mounted on the rear side 7 inside the vehicle where there are rear wheels and the like.

  Reference numeral 8 indicates a body frame. In the drawing, the upper side of the vehicle body frame 8 indicates the vehicle body floor 9. In addition, the lower side of the vehicle body frame 8 indicates a vehicle body floor 10. The vehicle body underfloor 10 is provided with a lean hose 11 having a substantially convex cross section for increasing vehicle strength. The lean hose 11 is formed so as to extend in the longitudinal direction of the vehicle. Reference numeral 12 on the front side 6 in the vehicle indicates an electrical junction box such as a known relay box. Reference numeral 13 on the rear side 7 in the vehicle indicates a known low-voltage battery (the arrangement of the low-voltage battery 13 is an example).

  In this embodiment, it is assumed that the motor 3 includes a motor and a generator. The inverter 4 includes an inverter and a converter in its configuration. The inverter 4 is an inverter assembly, and the inverter includes, for example, an air conditioner / inverter, a generator inverter, and a motor inverter. The battery 5 is of Ni-MH or Li-ion type and is modularized. It is assumed that a power storage device such as a capacitor can be used.

  The inverter 4 and the battery 5 are connected by the wire harness 21 of the present invention.

  The wire harness 21 of the present invention includes a plurality of high-voltage wires 22 that electrically connect the inverter 4 and the battery 5, a protective member 23 that protects the plurality of high-voltage wires 22, and a fixing member 24 for fixing the vehicle. It is prepared for. In addition, the wire harness 21 is not particularly limited, but in the present embodiment, the wire harness 21 is configured to include a plurality of known low-voltage electric wires 25 (in this embodiment, the low-voltage battery 13 is disposed on the rear side 7 inside the vehicle. It has a low voltage electric wire 25. In this embodiment, it is modularized). The wire harness 21 is formed so as to extend from the vehicle interior front side 6 through the vehicle body underfloor 10 to the vehicle interior rear side 7. The wire harness 21 penetrates the vehicle body frame 8. Hereinafter, each said structure of the wire harness 21 is demonstrated.

  The high-voltage electric wire 22 is a known power cable and has a circular cross section having a predetermined diameter. The high-voltage electric wire 22 is thicker than the low-voltage electric wire 25, and the conductor located at the center is made of copper, copper alloy, or aluminum. Two high-voltage electric wires 22 are provided in this embodiment, and each of these terminals is provided with a connector (not shown) having terminal fittings for connecting devices. The high voltage electric wire 22 may include a braid or the like and have a shield function (with regard to the shield function, a braid that covers a plurality of high voltage electric wires 22 may be provided. ).

  The low-voltage electric wire 25 is protected by the protective member 23 together with the high-voltage electric wire 22. One end of the low voltage electric wire 25 is connected to the electric junction box 12 and the other end is connected to the low voltage battery 13.

  The protection member 23 for protecting the plurality of high voltage electric wires 22 and the low voltage electric wires 25 is composed of a plurality of types of separate parts. More specifically, the protection member 23 includes vehicle interior protection members 26 and 27 and a vehicle body underfloor protection member 28. In addition, the function of the protection member 23 also has the said fixing member 24 in this form.

  The vehicle interior protection members 26 and 27 are protection members located inside the vehicle on the vehicle body floor 9 side, and are made of a synthetic resin having insulation properties and a known round corrugated tube having a circular cross section. Used here (a protector may be used. Also, a combination of a round corrugated tube and a protector, etc. may be used. The shape is not particularly limited as long as the high-voltage electric wire 22 and the like can be protected. The vehicle interior protection member 26 is disposed on the vehicle interior front side 6. Further, the vehicle interior protection member 27 is disposed on the vehicle interior rear side 7.

  1 and 2, the vehicle body underfloor protection member 28 is a flat tube made of a synthetic resin having a non-circular cross-sectional shape (here, an oval shape) and having an insulating property. (Refer to the direction of arrow P), the ridges 29 and the valleys 30 in the circumferential direction of the independent members are formed in an accordion shape so as to be alternately continuous. In other words, the vehicle body underfloor protection member 28 is formed in a shape like a flat corrugated tube. The body underfloor protective member 28 having such a shape is easily bent in the Q direction perpendicular to the paper surface of FIG. 2, and the bending direction is regulated so that it does not bend much in the arrow R direction (member width direction). Has become.

  Explaining the shape in more detail, the vehicle body underfloor protection member 28 is formed to have a pair of opposed planes and a pair of curved surfaces connecting the planes (the cross-sectional shape is an oval shape). The cross-sectional shape that is an oval is an example). Specifically, the cross-sectional shape is formed into an oval shape having an underfloor placement surface 31 and a ground facing surface 32 and a pair of curved surfaces 33. The peak portion 29 is formed with a floor surface 31, a ground-facing surface 32, and a top surface 34 that can be a curved surface 33.

  The reason for forming such a shape is that the height H2 of the vehicle body underfloor protection member 28 is made lower than the height H1 of the lean hose 11 (height H1 from the vehicle body underfloor 10 to the protruding tip surface of the lean hose 11). It is to do. In other words, the vehicle body underfloor protection member 28 has a lower height than the lean hose 11. Moreover, as the said reason, it is because the internal space 35 is formed so that it may match the state which arranged the high voltage electric wire 22 and the low voltage electric wire 25 in a horizontal line. The internal space 35 is formed so that a gap generated between the high-voltage electric wire 22 and the member inner surface 36 is minimized as long as the high-voltage electric wire 22 and the low-voltage electric wire 25 are accommodated side by side. (However, it is assumed that the gap is adjusted within a range that does not hinder manufacturing). The vehicle body underfloor protection member 28 is formed in such a shape as to be hidden in a dead space 37 (see FIG. 4) generated by the lean hose 11 when installed next to the lean hose 11.

  The vehicle body underfloor protection member 28 is formed in a seamless shape having no slit along the axial direction of the member (see the direction of arrow P in FIG. 2). A high-voltage electric wire 22 and a low-voltage electric wire 25 are respectively inserted into the vehicle body underfloor protection member 28 from the one opening toward the other opening.

  In FIG. 1, the fixing member 24 is a kind of a plurality of types of fixing members for fixing the wire harness 21 to the vehicle. Here, for example, the fixing member 24 is made of a synthetic resin having a portion to be screwed to the body frame 8. This protector is shown as an example. The fixing member 24 is a separate part from the protection member 23, and is formed so as to hold the vehicle body underfloor protection member 28 in a state along the vehicle body underfloor 10. In addition to the protector, a clip, a bracket, a band member, and the like can be cited as applicable. The positions and the number of the fixing members 24 illustrated in FIG. 1 are examples. The fixing member 24 is formed as a member that connects the vehicle interior protection members 26 and 27 and the vehicle body underfloor protection member 28 (assumed to be an example).

  Next, from the manufacture of the wire harness 21 to the vehicle assembly will be described with reference to FIG.

  In FIG. 3A, a fixing member 24 is provided at a predetermined position of the protective member 23 including the vehicle internal protective members 26 and 27 and the vehicle body underfloor protective member 28, and the protective member 23 includes a plurality of high-voltage wires 22 and low-voltage wires. When the terminals of the high-voltage electric wires 22 and the low-voltage electric wires 25 exposed through the vehicle interior protection members 26 and 27 are processed (connectors and terminal fittings are provided), the manufacture of the wire harness 21 of the present invention is completed. To do.

  The manufactured wire harness 21 is bent at the position of the vehicle body underfloor protection member 28 and the position of the vehicle interior protection members 26 and 27 and rolled as shown in FIG. The The wire harness 21 accommodated in the return box 38 is transported by a transport vehicle to an assembly factory of an automobile manufacturer. In the assembly factory, the wire harness 21 is taken out from the return box 38 before assembling the vehicle (see FIG. 3 (c)), and the assembly is completed at a predetermined position of the vehicle thereafter.

  As described above, according to the present invention, since the vehicle interior protection members 26 and 27 and the vehicle body underfloor protection member 28 of the protection member 23 constituting the wire harness 21 are made of synthetic resin, the metal metal protection pipe is provided. The weight can be reduced as compared with the conventional wire harness (see Patent Documents 1 and 2). Therefore, by reducing the weight, it is possible to easily handle the wire harness 21 itself and improve workability. Moreover, it can be adapted to the trend of weight reduction in the entire vehicle in recent years.

  Further, according to the present invention, since the underbody protection member 28 is made of an insulating synthetic resin, a large current does not flow through the underbody protection member 28 even if a leakage occurs inside. As a result, safety can be improved as compared with the conventional case.

  Further, according to the present invention, the vehicle body underfloor protection member 28 is a flat tube having a non-circular cross section, and has a shape in which a plurality of high voltage electric wires 22 and low voltage electric wires 25 are arranged in a horizontal row. Therefore, it is difficult to damage, and as a result, protection of the high-voltage electric wire 22 and the like can be made more reliable. Specifically, as shown in FIG. 4, the height H2 of the vehicle body underfloor protection member 28 is lower than the height H1 of the lean hose 11 (H1> H2). The vehicle body underfloor protection member 28 is separated from the protruding front end surface of the lean hose 11, and as a result, the vehicle body underfloor protection member 28 is hardly affected by the ground side. Therefore, it can be said that the vehicle body underfloor protection member 28 is hardly damaged, and the protection of the high-voltage electric wire 22 and the like can be further ensured.

  Here, when a comparative wire harness is manufactured with the same configuration as the conventional wire harness (see Patent Documents 1 and 2), the metal protective pipe 39 of the comparative wire harness and the vehicle body underfloor protective member 28 are compared. The height H3 of the metal protection pipe 39 is higher than the height H2 of the vehicle body underfloor protection member 28 (H2 <H3). This is because, when the comparison is made with the same number of wires, the wires are stacked inside the metal protection pipe 39, and the height is increased by the amount of the stacked wires. Therefore, even if the height H3 of the metal protection pipe 39 can be slightly lower than the height H1 of the lean hose 11 (H3 <H1), the height H3 of the metal protection pipe 37 is the vehicle body underfloor protection. Since it does not reach the height H2 of the member 28 (H2 <H3), the present invention can ensure the protection of the high-voltage wire 22 and the like more than the conventional example.

  Further, according to the present invention, the vehicle body underfloor protection member 28 is installed so as to be located at the side of the lean hose 11 with a lower height (H1> H2) than the lean hose 11, and thus the vehicle body underfloor protection member 28. Is completely hidden in the dead space 37. Therefore, it can be made more difficult to damage (the metal protective pipe 39 of the comparative wire harness is not completely hidden in the dead space 37, and the protrusion occurs).

  In addition, according to the present invention, since the vehicle body underfloor protection member 28 is installed so as to be located beside the lean hose 11, it is as if the lean hose 11 is used without adding any components. Strong structure can be achieved.

  In addition, according to the present invention, since the vehicle body underfloor protection member 28 has a seamless shape, moisture does not enter the interior even if there is a water splash, and as a result, the high voltage electric wire 22 and the like can be protected. Can do.

  In addition, according to the present invention, the vehicle body underfloor protection member 28 is accordion-like and easily bent, and is a flat tube, so that the bending direction can be restricted. Therefore, it becomes easy for the worker to grasp the bending direction when the worker is rolled and accommodated in the returnable box 38, and as a result, workability can be improved.

  Further, according to the present invention, the vehicle body underfloor protection member 28 is a bellows-like and flat tube having a top surface 34 that can be the underfloor placement surface 31, and is assembled along the vehicle body underfloor 10. In the metal protective pipe 39 of the comparative wire harness (the point contact portions are only arranged in a straight line and are not sitting well), and the contact area with the underbody floor 10 is increased. It can be made harder to wear than before. In other words, durability can be improved.

  In addition, according to the present invention, the vehicle body underfloor protection member 28 is a flat tube having a non-circular cross section, and has a shape in which the high-voltage electric wires 22 and the like are arranged in a horizontal row. Since the internal space 35 is adjusted so that the gap generated between the electric wire 22 and the member inner surface 36 is minimized, the high-voltage electric wire 22 can function as a tube deformation restricting member. That is, even when an external force is applied to the underbody protection member 28 due to, for example, stone jumping and abrupt bending occurs, the inner surface 36 of the member abuts against the high voltage electric wire 22 before the breakage and the stress is protected against underbody protection. It can be distributed to other parts of member 28 (high voltage wire 22 is utilized for stress distribution). In the case of a circular cross section (see, for example, FIG. 5C), a portion that is weak against external force (a gap generated between the electric wire and the inner surface of the member) becomes large, and this portion is subjected to external force due to stone jumping. In such a case, the possibility of breakage due to stress concentration is high. Therefore, the protection of the high-voltage electric wire 22 and the like can be further ensured by preventing the vehicle body underfloor protection member 28 from being damaged.

  According to the wire harness 21 of the present invention, it is possible to improve the workability, stability, durability, safety, and the like as compared with the conventional case due to the characteristics of the vehicle body underfloor protection member 28. Moreover, according to the wire harness 21 of the present invention, by using the lean hose 11 as a protective member, it is possible to suppress the addition of constituent members, and it is possible to achieve cost reduction and weight reduction.

  Next, another embodiment of the wire harness of the present invention will be described with reference to FIG. FIG. 5 is a cross-sectional view showing another embodiment, FIG. 5 (a) is a diagram showing a case where there are two high-voltage wires, FIG. 5 (b) is a diagram showing a case where there are three high-voltage wires, FIG. 5C is a diagram as a comparative example.

  A wire harness 51 of the present invention shown in FIG. 5A corresponds to two high-voltage electric wires 22. That is, the wire harness 51 is obtained by removing the low voltage electric wire 25 from the wire harness 21 of FIG. Further, the wire harness 51 is formed by forming a vehicle body underfloor protection member 52, which is a flat tube having a non-circular cross section, in a state in which two high-voltage electric wires 22 are arranged in a horizontal row.

  On the other hand, the wire harness 53 of the present invention shown in FIG. 5B corresponds to the three high-voltage electric wires 22. The wire harness 53 connects a motor and an inverter to supply power (assuming that the motor is mounted on the front side inside the vehicle and the inverter is mounted on the rear side inside the vehicle). A vehicle body underfloor protection member 54, which is a circular flat tube, is formed in a shape that matches the three high-voltage electric wires 22 arranged in a horizontal row.

  In addition, the comparative wire harness 55 is manufactured so as to correspond to the three high-voltage electric wires 22 with the same configuration as the conventional wire harness (see Patent Documents 1 and 2), and metal protection of the comparative wire harness 55 is performed. When the cross section is viewed at the position of the pipe 56, it can be seen that the gap 58 generated between the high voltage electric wire 22 and the member inner surface 57 is much larger than that of the wire harness 53 shown in FIG. Therefore, it can be said that the wire harness 53 shown in FIG. 5B is less susceptible to external force (in the case of the comparative wire harness 55, the wire harness 53 cannot function as a tube deformation restricting member). ).

  The wire harnesses 51 and 53 of the present invention shown in FIGS. 5A and 5B have the same effects as the wire harness 21 of the present invention. Moreover, since the wire harness 51 corresponds to the two high-voltage electric wires 22, the size in the member width direction can be made compact. Thereby, it can be made sure to be hidden in the dead space.

  Subsequently, still another embodiment of the wire harness of the present invention will be described with reference to FIG. FIG. 6 is a cross-sectional view showing still another embodiment, FIG. 6 (a) is a diagram showing a first example in the case of a flat high voltage electric wire, and FIG. 6 (b) is a flat high voltage. The figure which shows the 2nd example at the time of setting it as an electric wire, FIG.6 (c) is a figure which shows the 3rd example at the time of setting it as a flat type high voltage electric wire.

  The wire harness 61 of the present invention shown in FIG. 6A corresponds to three flat high-voltage electric wires 62 (the number is an example). The wire harness 61 includes a vehicle body underfloor protection member 63 that is a flat tube having a non-circular cross section, and the vehicle body underfloor protection member 63 has three flat high voltage electric wires 62 in a horizontal row. It is formed according to the state of arranging. The flat high-voltage electric wire 62 includes a flat conductor 64 whose conductor shape is substantially rectangular in cross section and an insulating coating 65 that covers the flat conductor 64. The flat type high voltage electric wire 62 is accommodated in the underbody protection member 63 in a state where the longitudinal direction of the cross section of the flat type conductor 64 is in the vertical direction in the drawing of FIG.

  By using the flat type high voltage electric wire 62, the size in the member width direction can be made compact. Therefore, the wire harness 61 itself can be reduced in size.

  A wire harness 66 of the present invention shown in FIG. 6B is a modification of the wire harness 61, and is further downsized. The vehicle body underfloor protection member 67 is formed to have a rectangular cross-sectional shape in accordance with the three flat high-voltage electric wires 62. According to the present invention, by downsizing, it is possible to make the shape easier to hide in the dead space beside the lean hose, as well as facilitating securing of the space when the wire harness is transported. .

  On the other hand, the wire harness 68 of the present invention shown in FIG. 6C is also a modification of the wire harness 61, and the conductor shape of the flat high-voltage electric wire 69 is different. In other words, the flat high-voltage electric wire 69 includes a conductor 70 having a shape that has a substantially flat cross section by arranging a plurality of strands (or stranded wires). Such a conductor 70 is covered with an insulating coating 71.

  In addition, the present invention can of course be modified in various ways within the scope not changing the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 Hybrid vehicle 2 Engine 3 Motor 4 Inverter 5 Battery 6 Front side inside vehicle 7 Rear side inside vehicle 8 Body frame 9 Above body floor 10 Below body floor 11 Lean hose 12 Electric junction box 13 Low voltage battery 21 Wire harness 22 High voltage electric wire 23 Protection member 24 Fixed Member 25 Low-voltage electric wire 26, 27 Vehicle interior protection member 28 Body underfloor protection member 29 Mountain portion 30 Valley portion 31 Underfloor mounting surface 32 Ground facing surface 33 Curved surface 34 Top surface 35 Internal space 36 Member inner surface 37 Dead space 38 Passing box 51, 53 Wire harness 52, 54 Underbody protection member 61, 66, 68 Wire harness 62, 69 Flat high-voltage electric wire 63, 67 Underbody protection member 64 Flat conductor 65, 71 Insulation coating 70 Conductor

Claims (5)

In a protective member for a vehicle body underfloor wire harness that protects a plurality of high-voltage wires connecting between a battery and an inverter, extending from the vehicle interior front side of the hybrid vehicle or the electric vehicle to the vehicle interior rear side that is outside the vehicle body frame,
The protective member is installed beside a lean hose provided on the vehicle body frame so as to protrude from the underside of the vehicle body floor toward the ground, and is formed in a shape that is lower than the lean hose,
The protective member further includes a low-voltage electric wire, and the low-voltage electric wire is inserted in a state of being arranged in a horizontal row with the high-voltage electric wire. In the protective member of the vehicle body underfloor wire harness according to claim 1,
The protective member for a vehicle body under-floor wire harness, wherein the protective member is formed of a flat tube made of synthetic resin having a non-circular cross-sectional insulating property. In the protection member of the vehicle underfloor wire harness according to claim 1 or 2,
The protective member is formed in an accordion-like shape having a top surface that can be an underfloor installation surface in the mountain portion while alternately continuing independent mountain circumferential portions and valley portions along the member axial direction. A protective member for a vehicle body under-floor wire harness characterized by comprising: In the protection member of the vehicle underfloor wire harness according to any one of claims 1 to 3,
The high-voltage electric wire is a flat high-voltage electric wire comprising a flat conductor having a substantially rectangular cross-section, or a conductor having a shape that is substantially flat by arranging a plurality of strands or strands. A vehicle under-floor wire harness protective member. In the protection member of the vehicle underfloor wire harness according to any one of claims 1 to 4,
The protective member for a vehicle under-floor wire harness, wherein the protective member is provided with a separate fixing member for fixing to the vehicle body under-floor.

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