JP2011131714A - Floor panel of vehicle - Google Patents

Abstract

An object of the present invention is to provide a vehicle floor panel that can form an electromagnetic wave shield around an electric cable and can improve the loading efficiency of the electric cable during transportation.
A floor panel (30) of a vehicle (1) includes a metal panel body (31) in which an accommodation groove (32) capable of accommodating an AC power cable (28) is formed, and a metal lid member (34) closing the accommodation groove (32). I have.
[Selection] Figure 1

Description

  The present invention relates to a vehicle floor panel using an electric motor such as an electric vehicle as a travel drive source.

  In a vehicle using an electric motor as a driving source such as an electric vehicle (EV), a hybrid electric vehicle (HEV), or a fuel cell vehicle (FCV), an inverter and an electric motor, or a battery An electric cable is used to connect the inverter. Since a high voltage is applied to this type of electric cable, it is necessary to form an electromagnetic wave shield around it.

  As such an electric cable with a shield, an electric cable inserted into a rigid metal pipe that is three-dimensionally bent along the wiring path of the electric cable is known (for example, see Patent Document 1). .

JP 2004-171952 A

  By the way, when the electrical cable manufacturing plant and the automobile assembly plant are separated, it is necessary to transport the shielded electrical cable by a truck or the like. There is a problem that the volume increases and the loading efficiency is inferior.

  The problem to be solved by the present invention is to provide a vehicle floor panel that can form an electromagnetic wave shield around an electric cable and can improve the loading efficiency of the electric cable during transportation.

  According to the present invention, the vehicle floor panel includes a metal panel main body portion in which a groove capable of accommodating an electric cable is formed, and a metal lid member that closes the groove. A floor panel is provided.

  According to the present invention, the electric cable is accommodated in the accommodating groove formed in the metal panel main body, and the accommodating groove is closed by the metal lid member, so that an electromagnetic wave shield can be formed around the electric cable. At the same time, the loading capacity of the electric cable can be reduced by reducing the load volume of the electric cable during transportation.

FIG. 1 is a bottom view (floor view) showing an electric vehicle according to an embodiment of the present invention. FIG. 2 is a side view showing the electric vehicle of FIG. FIG. 3 is a block diagram showing a drive system of the electric vehicle shown in FIG. FIG. 4 is a cross-sectional view taken along line VI-VI in FIG. FIG. 5 is a cross-sectional view showing a modification of the accommodation groove of the front floor panel in the embodiment of the present invention. FIG. 6 is an exploded cross-sectional view illustrating a state in which the power cable is assembled to the front floor panel of the electric vehicle in the embodiment of the present invention. 7 is a cross-sectional view taken along line VII-VII in FIG. FIG. 8 is a cross-sectional view showing a first modification of the holding means for the front floor panel in the embodiment of the present invention. FIG. 9 is a cross-sectional view showing a second modification of the holding means for the front floor panel in the embodiment of the present invention. FIG. 10 is a cross-sectional view showing a third modification of the holding means for the front floor panel in the embodiment of the present invention. FIG. 11 is a cross-sectional view showing a fourth modification of the holding means for the front floor panel in the embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 to 3 are views showing an electric vehicle according to the present embodiment, FIG. 4 is a sectional view of an accommodation groove formed in the front floor panel, FIG. 5 is a sectional view showing a modification of the accommodation groove, and FIG. 6 is a front floor. FIG. 7 is an exploded sectional view showing a state where the power cable is assembled to the panel, FIG. 7 is a longitudinal sectional view of the receiving groove, and FIGS. 8 to 11 are views showing modifications of the holding means of the front floor panel. 7 to 9, the electric cable is omitted.

  Below, the example which applied this invention to the electric power supply line which connects an inverter and an electric motor in the electric vehicle which uses an electric motor as a travel drive source is demonstrated. In addition, you may apply this invention to the electric power supply line between a battery and an inverter. In addition to the description in this example, the electric vehicle using an electric motor as a travel drive source is replaced by a hybrid electric vehicle using both an internal combustion engine and an electric motor as a travel drive source, or a battery including a secondary battery. And fuel cell vehicles powered by fuel cells.

  As shown in FIG. 3, the electric vehicle 1 according to the present embodiment includes a battery 21 formed of a secondary battery such as a lithium ion battery, an inverter 22 that converts DC power of the battery 21 into AC power, and a travel drive source. And a certain three-phase AC electric motor 23. The output of the electric motor 23 is transmitted to the drive wheels 26 and 26 via the transmission 24 and the differential gear 25 connected to the output shaft 23 a of the electric motor 23.

  The DC power battery 21 and the inverter 22 are connected by a DC power cable 27. On the other hand, the inverter 22 and the electric motor 23 are connected by an AC power cable 28. As shown in FIG. 4, the AC power cable (wire harness) 28 includes three electric cables 281 for three-phase AC power (U, V, W phase).

  As shown in FIG. 3, the inverter 22 includes a circuit in which two switching elements (transistors Tr) connected in series are connected in parallel in three columns, and the six switching elements are switched by a predetermined drive signal. This is a power converter that converts DC power from the battery 21 into three-phase AC power. Further, during regeneration of the electric motor 23, the regenerated AC power can be converted into DC power by the inverter 22 and the battery 21 can be charged with this.

  In the electric vehicle 1 according to this embodiment, as shown in FIGS. 1 and 2, the electric motor 23 is disposed in the front trunk room 11 (so-called engine room), while the battery 21 and the inverter 22 are disposed in the rear trunk room 12. Has been. For this reason, the DC power cable 27 connecting the battery 21 and the inverter 22 is routed in the rear trunk room 12, but the AC power cable 28 connecting the inverter 22 and the electric motor 23 is connected from the rear trunk room 12 to the front floor. The panel 30 is routed to the front trunk room 11.

  The underbody of the vehicle body 10 of the electric vehicle 1 according to this embodiment includes a dash panel 14 that partitions the front trunk room 11 and the vehicle interior 13, a front floor panel 30 that constitutes a floor surface of the vehicle interior 13, and a floor of the rear trunk room 12. The rear floor panel 15 constituting the surface and the extension panel 16 connecting the front floor panel 30 and the rear floor panel 15 are joined by welding or the like.

  Then, as shown in FIG. 2, the AC power cable 28 is inserted from the rear trunk room 12 in which the inverter 22 is mounted through the hole formed in the rear floor panel 15 to the floor behind the vehicle body structure. It reaches the rear end of the front floor panel 30 along the lower surface of the extension panel 16, further passes through the front floor panel 30 to the lower end of the dash panel 14, and rises along the lower surface of the dash panel 14 to the electric motor 23. It has been routed.

  One end of the AC power cable 28 is connected to an input / output terminal of the electric motor 23 via a connector 282. The other end of the AC power cable 28 is also connected to the input / output terminal of the inverter 22 via the connector 283.

  Between the inverter 22 and the rear end of the front floor panel 30, or between the front end of the front floor panel 30 and the electric motor 23, the AC power cable 28 is inserted into a flexible bellows-like cylindrical member 29. As a result, electromagnetic shielding properties, water tightness, and chipping resistance are ensured. The cylindrical member 29 is made of a metal material having electromagnetic wave shielding properties such as aluminum, stainless steel, copper, an aluminum alloy, or a copper alloy.

  The vicinity of at least one of the connectors 282 and 283 may be replaced with the tubular member 29 and may be constituted by a braided member in which conductive metal fine wires are knitted. Thereby, the mounting workability to the connectors 282 and 283 to the inverter 22 and the electric motor 23 is further improved.

  The front floor panel 30 in the present embodiment includes a panel main body portion 31 in which a housing groove 32 is formed, and a lid member 34 that closes the housing groove 32.

  The panel main body 31 is made of a metal material having electromagnetic wave shielding properties. As shown in FIGS. 1 and 2, a housing groove 32 that can accommodate the AC power cable 28 is formed on the lower surface of the panel body 31. The accommodation groove 32 is formed from the rear end to the front end of the front floor panel 30 so as to follow the routing path of the AC power cable 28.

  As shown in FIG. 4, the accommodation groove 32 has a semi-elliptical cross section that is large enough to accommodate three electrical cables 281. The number of electrical cables that can be accommodated in the accommodation groove is not particularly limited. Further, the cross-sectional shape of the receiving groove is not particularly limited, and for example, as shown in FIG.

  As shown in FIG. 4, a rib 321 that protrudes from the inner wall surface toward the center is formed inside the accommodation groove 32. When the AC power cable 28 is routed to the front floor panel 30, the vehicle body 10 is inclined and lifted by about 45 degrees. In this embodiment, as shown in FIG. Since the electric cable 281 accommodated in the accommodation groove 32 can be temporarily held by the rib 321 before closing the cable, the wiring workability of the AC power cable 28 is improved.

  As shown in FIG. 7, the rib 321 is formed over the entire length of the accommodation groove 32. In addition, as shown in FIG. 8, you may provide the rib 321 intermittently in the full length direction of the accommodation groove | channel 32. As shown in FIG. Alternatively, instead of the rib 321, a pin 322 as shown in FIG. 9 may be provided in the accommodation groove 32, or as shown in FIG. 10, a recess 323 may be formed in a part of the accommodation groove 32 </ b> C.

  Further, as shown in FIGS. 4 and 6, a plurality of insertion holes 33 for inserting bolts 37 around the accommodation groove 32 are formed in the panel main body 31.

  The lid member 34 is a plate member made of a metal material having electromagnetic wave shielding properties. As shown in FIG. 1, the lid member 34 has a shape corresponding to the routing path of the AC power cable 28, similarly to the housing groove 32 of the panel main body 31, and the housing groove 32 of the panel main body 31. It is possible to block the whole.

  As shown in FIGS. 4 and 6, a seal groove 341 is formed on one main surface of the lid member 34 at a position slightly wider than the housing groove 32. The seal groove 341 is formed over the entire length of the lid member 34, and a seal member 39 made of, for example, an elastic synthetic resin or the like can be press-fitted. The lid member 34 is formed with an insertion hole 342 for inserting the bolt 37 at a position corresponding to the insertion hole 33 of the panel main body 31. Instead of the rib 321 of the housing groove 32, a rib 343 may be provided on the lid member 34 as shown in FIG.

  In the present embodiment, the AC power cable 28 is assembled to the front floor panel 30 in the following manner.

  That is, as shown in FIG. 6, with the vehicle body 10 tilted and lifted by about 45 degrees, the three electric cables 281 are inserted into the receiving grooves 32, and the electric cables 281 are temporarily attached to the ribs 321 in the receiving grooves 32. To keep.

  Next, the sealing member 39 is press-fitted into the sealing groove 341 of the lid member 34, and the housing groove 32 is closed with the lid member 34. Next, the bolt 37 is inserted into the insertion holes 33 and 342, and the bolt 37 and the nut 38 are screwed together to fix the lid member 34 to the panel main body 31.

  As described above, in this embodiment, the AC current cable 28 is routed in the vehicle body 10 of the electric vehicle 1 by accommodating the AC current cable 28 in the accommodation groove 32 of the front floor panel 30. Therefore, when the AC current cable 28 is transported from the manufacturing factory to the assembly factory of the electric vehicle 1, the AC electric cable 28 can be deformed so as to be bundled to reduce the package volume. The loading efficiency can be improved.

  On the other hand, when the AC power cable 28 is assembled to the front floor panel 30, the AC power cable 28 is surrounded by the housing groove 32 formed in the metal panel main body 31 and the metal lid member 34. For this reason, the AC power cable 28 is electromagnetically shielded and the chipping resistance (prevention of flying stones) of the AC power cable 28 is ensured.

  Further, the seal member 39 disposed between the periphery of the housing groove 32 and the lid member 34 in the panel main body 31 has high water-tightness in the space S (see FIG. 4) formed by the housing groove 32 and the lid member 34. Is secured.

  The embodiment described above is described for facilitating the understanding of the present invention, and is not described for limiting the present invention. Therefore, each element disclosed in the above embodiment is intended to include all design changes and equivalents belonging to the technical scope of the present invention.

  For example, instead of the layout of the battery 21, the inverter 22, and the electric motor 23 shown in FIGS. 1 and 2, the battery 21 can be arranged in the rear trunk room, and the inverter 22 can be arranged in the front trunk room. In this case, it is preferable to pass the DC power cable 27 connecting the battery 21 and the inverter 22 through the floor panel according to the present invention.

DESCRIPTION OF SYMBOLS 1 ... Electric vehicle 10 ... Car body 21 ... Battery 22 ... Inverter 23 ... Electric motor 28 ... AC power cable 281 ... Electric cable 282,283 ... Connector 30 ... Front floor panel 31 ... Panel main-body part 32 ... Housing groove
321 ... Rib 34 ... Lid member 37 ... Bolt 38 ... Nut 39 ... Seal member

Claims (6)

A vehicle floor panel,
A metal panel main body formed with an accommodation groove capable of accommodating an electrical cable;
A floor panel comprising: a metal lid member that closes the housing groove. The floor panel according to claim 1,
A floor panel comprising a seal member interposed between the housing groove and the lid member in the panel main body. The floor panel according to claim 1 or 2,
A floor panel comprising holding means for temporarily holding the electric cable. The floor panel according to claim 3,
The floor panel, wherein the holding means is provided inside the receiving groove. The floor panel according to claim 3,
The floor panel, wherein the holding means is provided on the lid member. The floor panel according to any one of claims 1 to 5,
The floor panel according to claim 1, wherein the electric cable is a cable for supplying driving power to a vehicle using an electric motor as a travel drive source.

Images