JP5778003B2 - Motor drive vehicle - Google Patents

Description

  The present invention relates to a motor-driven vehicle.

  2. Description of the Related Art Conventionally, a vehicle is known in which a motor is accommodated in a front portion of a vehicle, an under cover is provided under the motor, an opening is formed in the under cover, and the motor identification number can be visually observed from the opening ( Patent Document 1).

  In the vehicle disclosed in Patent Document 1, a portion of the undercover located behind the marking surface of the motor identification number is configured as an inclined surface extending rearward and upward, and the opening is formed in the inclined surface. ing. Further, the rear end portion of the under cover is connected to a front sub-frame that is positioned below the vehicle and behind the motor and supports the motor.

JP 2009-286259 A

  In the structure of Patent Document 1, since the inclined surface as described above is formed in the under cover, and the opening is provided in this surface, the surface of the under cover that extends forward from the front edge of the inclined surface approaches the ground side. It may be difficult to secure the minimum ground clearance. In addition, the motor arranged above the under cover needs to be separated from the under cover to some extent in order to prevent contact. However, if it is difficult to secure the minimum ground clearance as described above, the under cover is the lowest. Since the motor is arranged above the vehicle body structure that can secure the ground clearance, it is difficult to lower the center of gravity. Furthermore, the motor, the under cover, and the front subframe are separated from each other, and there is a problem that the space occupied by each component is relatively large in a limited space above the under cover.

  The present invention has been made in view of such circumstances, and in the case of forming an opening in the under cover that allows the motor identification number to be visually confirmed, it is easy to ensure the minimum ground clearance of the under cover, and above it. It is an object of the present invention to provide a motor-driven vehicle that makes it possible to arrange a motor as low as possible so that the center of gravity can be easily lowered and the layout of components can be improved.

As means for solving the above problems, the present invention provides the following means.
The invention described in claim 1 is a motor-driven vehicle (for example, the motor-driven vehicle 1 in the embodiment) that travels using a motor (for example, the motor 8 in the embodiment) as a drive source, and the left and right drive wheels (for example, the embodiment). A recess space (for example, the recess space 30 in the embodiment) surrounding at least a part of the motor disposed between the front wheels 21 and 21) in the left and right and the rear is formed, and the motor is positioned below the vehicle. A frame member (e.g., the front subframe 25 in the embodiment) that supports the frame member, and an under cover (e.g., the rear under cover 34 in the embodiment) that is disposed below the motor and coupled to the frame member. An identification number (for example, the identification number display unit 22 in the embodiment) is attached to the outer peripheral surface of the motor, and the under- The cover, the opening of the identification number to be visible from the outside of the under cover (opening 39 in the example embodiment) is formed, the under cover is a flat surface on which the rear end portion overlaps the frame member ( For example, it has a flat surface 37) in the embodiment, and a portion of the flat surface located below the identification number has a concave portion (for example, the concave portion 38 in the embodiment) recessed upward, and the concave portion is a vehicle. A front wall portion (for example, the front wall portion 40 in the embodiment) configured on the vehicle front side as an inclined surface extending upward from the front toward the rear, and the identification number is located in the recess space, A motor-driven vehicle is provided, wherein the motor-driven vehicle is formed on an upper portion of the recess so that at least a part of the opening is located in the recess space.

  According to a second aspect of the present invention, in the motor-driven vehicle according to the first aspect, a surface of the frame member facing the motor is configured as an inclined surface along the outer shape of the motor.

  According to a third aspect of the present invention, in the motor-driven vehicle according to the first or second aspect, the rear surface of the peripheral portion of the opening in the under cover extends downward as viewed from the front toward the rear in a side view. It is characterized by being configured as.

According to a fourth aspect of the present invention, in the motor-driven vehicle according to any one of the first to third aspects, an upper portion (for example, the upper wall portion 41 in the embodiment) of the peripheral portion of the opening in the under cover. It is characterized by being configured as an inclined surface extending upward as it goes from the front to the rear in a side view .

According to the first aspect of the present invention, the motor identification number formed on the under cover where the motor is disposed below the vehicle and connected to the frame member that supports the motor is visible. By configuring at least a part of the opening to be located in a recessed space that surrounds the motor in the frame member from the left and right and rear, it is possible to make the under cover as close as possible to the frame member, It is easy to secure the minimum ground clearance of the under cover. In addition, since the motor identification number is located in the recess space, the motor approaches the under cover, and the center of gravity can be easily lowered. And by using the recessed space which a frame member forms as an arrangement position of an opening and an identification number, a motor, an under cover, and a frame member can be arranged collectively, and efficiency of parts layout can be aimed at.
Moreover, the influence of snow attachment or chipping can be suppressed by covering the opening from the front by the inclined surface formed in front of the opening. Further, the traveling wind flowing above the under cover flows along the inclined surface, so that the traveling wind can be prevented from flowing out from the opening to the lower side of the under cover.

  According to the second aspect of the present invention, the motor can be easily brought close to the frame member. Therefore, the motor and the frame member can be arranged in a concentrated manner, and the efficiency of the component layout can be further improved.

  According to the third aspect of the present invention, the opening is covered from behind by the inclined surface formed at the rear of the opening, so that the influence of snow and chipping can be suppressed.

It is a longitudinal cross-sectional view of the front part of the motor drive vehicle which concerns on embodiment of this invention. It is an enlarged view of FIG. It is a perspective view of the side frame provided in the vehicle front part of the motor drive vehicle. It is a bottom view of the vehicle front part of the motor-driven vehicle. It is a bottom view of the vehicle front part of the state which removed the under cover from the state shown in FIG.

  Hereinafter, embodiments of the present invention will be described. In the drawings used below, arrow FR indicates the front of the vehicle, arrow UP indicates the upper side of the vehicle, and arrow LH indicates the left side of the vehicle.

  FIG. 1 is a front longitudinal sectional view of a motor-driven vehicle 1 according to the present embodiment. As shown in FIG. 1, a motor room 3 closed by a bonnet 2 is provided at the front of a vehicle body of a motor-driven vehicle 1. Front grilles 5, 6 are arranged on the front part of the motor room 3 so as to sandwich the bumper stay 4, and a radiator 7 is arranged behind the front grills 5, 6.

  The radiator 7 cools the coolant of the drive train including the motor 8 and a power control unit (hereinafter, PCU (Power Control Unit)) 9 that controls the motor 8 by exchanging heat with the outside air that is the traveling wind. A radiator fan 10 is provided behind the radiator 7, and a radiator shroud 11 is provided between the radiator 7 and the radiator fan 10.

  A motor 8 and a PCU 9 are located behind the radiator 7, the motor 8 is disposed in the lower part of the motor room 3, and the PCU 9 is disposed in the upper part of the motor room 3 above the motor 8. A dashboard upper 12 extends in the vehicle front-rear direction above the PCU 9, a dashboard lower 13 extends in the vertical direction behind the motor 8 and the PCU 9, and an upper edge of the dashboard lower 13 extends from the dashboard upper 12. It is connected to the rear end. The vehicle compartment and the motor room 3 are partitioned by a dashboard 14 including the dashboard upper 12 and the dashboard lower 13.

  From the front part of the dashboard upper 12 and the rear part of the bonnet 2, a front window glass 15 is provided so as to rise obliquely upward. In the vehicle of this embodiment, the dashboard upper 12 has a longer width in the front-rear direction because the front window glass 15 is inclined and extended considerably forward for safety reasons due to good front visibility and modeling reasons. The upper part of the motor room 3 is covered so as to protrude to the front side. In the figure, reference numeral 16 indicates a bumper face supported by the bumper stay 4.

  The motor 8 as a drive source of the motor-driven vehicle 1 includes a motor main body 17 and a housing 18 that covers the motor main body 17, has a substantially cylindrical shape, and is arranged with the rotation shaft 19 facing the vehicle width direction. . Referring also to FIG. 2, the rotary shaft 19 is a hollow shaft, and an output shaft 20 of a mission integrally connected to the motor 8 is coaxially disposed therein, and left and right front wheels 21, 21 are connected to the output shaft 20. And the motor 8 is disposed between the left and right front wheels 21 and 21. Further, a flat identification number display portion 22 on which a model number, a manufacturing number, and the like are imprinted is provided on the rear portion of the lower portion of the housing 18 constituting the outer peripheral surface of the motor 8 on the outer surface facing obliquely rearward and downward.

  A rear bracket 23 extending rearward is provided above the rear portion of the housing 18, and a pair of left and right front brackets 24, 24 extending forward are provided above the front portion of the housing 18 with reference to FIG. 5. Yes. The rear bracket 23 is connected to a rear mount member 26 that is disposed behind the motor 8 and is installed on the upper portion of the front subframe 25 positioned below the vehicle, and the front brackets 24 and 24 are disposed in front of the motor 8. The front mount members 28 and 28 are respectively connected to the lower side of the front beam 27 that is disposed and extends in the vehicle width direction.

  The rear mount member 26 and the front mount members 28 and 28 support the load of the motor 8 transmitted from the rear bracket 23 and the front brackets 24 and 24 via elastic members (not shown), respectively.

  3 to 5, the front sub-frame 25 extends in the vehicle width direction and has a certain width in the vehicle vertical direction and the vehicle front-rear direction. As shown in FIGS. 4 and 5, the front sub-frame 25 is located between the front wheels 21 and 21, and the front wheels 21 and 21 are supported by left and right arms 29 and 29 supported on both sides thereof.

The front portion of the front subframe 25 forms a recessed space 30 (a region with dots for convenience of description) surrounding the lower rear side of the motor 8 from the left and right and the rear. Is configured so as to have a substantially arc shape that opens forward in a cross section. More specifically, the front sub-frame 25 extends at the front part thereof toward the vehicle front in the vehicle width direction from the central front part 31 covering the rear lower side of the motor 8 from the rear and the right end part of the central front part 31. A right front surface portion 32 covering the lower rear side of the motor 8 from the right side, and a left front surface portion extending obliquely forward in the vehicle width direction from the left end portion of the central front surface portion 31 to cover the lower rear side of the motor 8 from the left side. 33, and the recess space 30 is formed by these front portions.

  A central front surface portion 31 facing the lower rear side of the motor 8 in the vehicle front-rear direction is configured as an inclined surface along the outer shape of the motor 8. 2 and 5 together, the central front surface portion 31 partially overlaps the motor 8 in the vertical direction, and the central front surface portion 31 covers the lower rear side of the motor 8 from below. . Here, the motor 8 is located above the lower end portion of the front sub-frame 25, and the identification number display portion 22 of the motor 8 is located in the recess space 30.

  2 and 4, a rear end portion of the rear under cover 34 is connected to the lower surface of the front portion of the front sub frame 25, and the rear under cover 34 extends forward from the front sub frame 25. A front under cover 35 is connected to the front end portion and both side end portions of the rear under cover 34. The front end of the front under cover 35 is connected to the lower end of the bumper face 16 with reference to FIG. Here, the rear under cover 34 has a rear end portion overlapped with a front lower surface of the front subframe 25 and is connected by screwing, and a rear end portion of the rear under cover 34 and a front lower surface of the front subframe 25 are connected to each other. , So that there is no gap. In addition, the rear under cover 34 has its front end portion and both side end portions superimposed on the lower surface of the corresponding portion of the front under cover 35 and screwed together so that the rear under cover 34 and the front under cover 35 have no gap. It comes to adhere closely.

  Referring to FIGS. 1 and 2, the rear under cover 34 includes a first inclined surface 36 that gently descends from below the radiator fan 10 to obliquely rearward and downward, and the first inclined surface at a position near the lower front end of the motor 8. A flat surface 37 extending horizontally rearward from the rear end portion of 36 is continuous, and the rear end portion of the flat surface 37 overlaps the front subframe 25.

  Here, referring also to FIG. 4, a concave portion 38 that is recessed upward is formed in a portion of the flat surface 37 located below the identification number display portion 22, and the identification number display portion 22 is formed above the concave portion 38. An opening 39 is formed so that the image can be viewed from below. As is clear from FIG. 2, the opening 39 is formed in the recess 38 so as to be positioned in the recess space 30, and strictly speaking, a part thereof is positioned in the recess space 30. With this opening 39, the user can view the identification number display unit 22 along the direction indicated by the arrow α in FIG.

  The concave portion 38 has a bathtub-shaped shape along the longitudinal direction in the vehicle width direction, and the opening 39 is formed in a slit shape along the longitudinal direction in the vehicle width direction. That is, in this embodiment, it can be said that the peripheral edge part of the opening part 39 is formed in concave shape. As shown in FIG. 2, the front wall portion 40 (corresponding to the front portion of the peripheral portion of the opening 39) located on the front side of the vehicle in the recess 38 is configured as an inclined surface that extends upward from the front toward the rear. Further, the upper wall portion 41 that extends rearward from the front wall portion 40 is also configured as an inclined surface that gently extends upward from the front toward the rear. On the other hand, the rear wall portion 42 (corresponding to the rear portion of the peripheral portion of the opening 39) located on the vehicle rear side in the concave portion 38 is configured as an inclined surface extending downward from the front toward the rear. Note that a portion of the flat surface 37 that extends forward continuously from the lower end of the front wall portion 40 and a portion of the flat surface 37 that extends rearward continuously from the lower end of the rear wall portion 42 extend substantially horizontally.

  Here, with reference to FIGS. 1, 2, and 4, the flow of traveling wind that is introduced from the front grills 5 and 6 and flows above the rear under cover 34 in the motor-driven vehicle 1 will be described. First, since the motor 8 is positioned behind the radiator 7, the traveling wind flowing above the motor room 3 easily flows upward along the outer shape of the motor 8 as shown by W <b> 1 in FIGS. 1 and 2. It becomes difficult to flow to the rear under cover 34 side. Further, the traveling wind that flows below the motor 8 and flows toward the rear under cover 34 is configured as an inclined surface that extends upward in the motor room 3 as the front wall portion 40 of the recess 38 moves from the front to the rear. 1 and FIG. 2, since it is directed rearward and upward along the front wall portion 40, it is difficult to come out from the opening 39.

Furthermore, referring to FIG. 4, since the motor 8 is arranged in a relatively wide range in the vehicle width direction as a whole, the motor 8 is moved outward in the vehicle width direction by the motor 8 as indicated by W3 in FIG. The rear under cover 34 hardly flows to the rear side.
Thus, in the motor-driven vehicle 1 of the present embodiment, the traveling wind above the rear under cover 34 is difficult to flow below the motor 8, and even if it flows, it is difficult to escape below the rear under cover 34. . For this reason, the traveling wind above the rear under cover 34 flows downward from the opening 39, and the wind that has escaped affects the traveling wind below the rear under cover 34 rectified by the rear under cover 34 ( It has a structure that can suppress the occurrence of turbulent flow.

  In the motor-driven vehicle 1 according to the present embodiment described above, the rear under cover is connected to the front subframe 25 that is a frame member that is positioned below the vehicle and supports the motor 8, and the motor 8 is disposed above the front subframe 25. At least a part of the opening 39 that is formed at 34 and allows the identification number of the motor 8 to be viewed is configured to be located in the recessed space 30 formed by the front subframe 25. In this structure, the rear under cover 34 can be brought as close as possible to the front subframe 25 in the vertical direction, so that the minimum ground clearance of the rear under cover 34 can be easily ensured. In addition, since the motor 8 is positioned closer to the rear under cover 34 because the identification number of the motor 8 is located in the recess space 30, the center of gravity can be easily lowered. Then, by using the recess space 30 as described above as the position of the opening 39 and the identification number, the motor 8, the rear under cover 34, and the front subframe 25 are collectively arranged to improve the efficiency of component layout. Can be planned.

  In the motor-driven vehicle 1, the central front surface portion 31 that faces the motor 8 in the front subframe 25 is configured as an inclined surface that follows the outer shape of the motor 8, so that the motor 8 can be easily brought close to the front subframe 25. For this reason, it is possible to improve the efficiency of the component layout by collecting and arranging the components.

  Further, in the motor-driven vehicle 1, the rear wall portion 42 corresponding to the rear portion of the peripheral portion of the opening 39 in the rear under cover 34 is configured as an inclined surface that extends downward from the front to the rear in a side view. By covering the opening 39 from behind, the influence of snow and chipping can be suppressed. Further, in the rear under cover 34, a front wall portion 40 corresponding to the front portion of the peripheral edge portion of the opening 39 is configured as an inclined surface extending upward from the front to the rear in a side view. It is possible to suppress the influence of snow and chipping. Furthermore, the traveling wind that flows above the rear under cover 34 flows along the front wall portion 40, so that the traveling wind can be prevented from flowing out from the opening 39 below the rear under cover 34.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and can be appropriately changed without departing from the spirit thereof. For example, in the above embodiment, the motor-driven vehicle is described as an electric vehicle that drives the power storage device as a power source. However, the present invention includes a fuel cell vehicle that uses the power source as a fuel cell.

In the present embodiment, an example in which a part of the opening 39 is located in the recess space 30 has been described. However, the opening 39 may be completely located in the recess space 30 .

DESCRIPTION OF SYMBOLS 1 Motor drive vehicle 8 Motor 21 Front wheel 22 Identification number display part (identification number)
25 Front subframe (frame member)
30 Recessed space 34 Rear under cover 39 Opening

Claims (4)

A motor-driven vehicle that travels using a motor as a drive source,
A frame member that forms a recessed space that surrounds at least a part of the motor disposed between the left and right drive wheels from the left and right and the rear, and that is positioned below the vehicle and supports the motor;
An under cover disposed below the motor and coupled to the frame member,
An identification number is attached to the outer peripheral surface of the motor,
The under cover is formed with an opening that makes the identification number visible from the outside of the under cover.
The under cover has a flat surface with a rear end portion overlapping the frame member,
In the flat surface, the portion located below the identification number has a concave portion recessed upward,
The concave portion has a front wall portion that is configured on the vehicle front side as an inclined surface that extends upward as it goes rearward from the vehicle front,
The motor-driven vehicle, wherein the identification number is located in the recess space, and is formed at an upper portion of the recess so that at least a part of the opening is located in the recess space.   The motor-driven vehicle according to claim 1, wherein a surface of the frame member that faces the motor is configured as an inclined surface that follows an outer shape of the motor.   3. The motor-driven vehicle according to claim 1, wherein a rear portion of a peripheral portion of the opening in the under cover is configured as an inclined surface that extends downward as viewed from the front toward the rear in a side view.   The upper part of the peripheral part of the said opening part in the said undercover is comprised as an inclined surface extended upwards as it goes to the back from the front in a side view, The one of Claims 1-3 characterized by the above-mentioned. Motor driven vehicle.

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