JP2021010265A - vehicle - Google Patents

Abstract

To provide a vehicle in which a holding portion held when a drive unit is lifted can be effectively utilized even after the drive unit is assembled to the vehicle.SOLUTION: A vehicle 1 includes a drive unit 30 including a motor MOT, and a case 40 that accommodates the motor MOT, and a subframe 14 supporting the drive unit 30, and the subframe 14 includes an upper frame portion 51 extending above the drive unit 30 in the vehicle width direction, and the case 40 includes a holding portion 41 that projects upward from the upper surface 40u of the case 40 and is held when the drive unit 30 is lifted. The holding portion 41 is arranged with respect to an upper frame portion 51 via a predetermined gap S2 in the front-rear direction, and is arranged so as to overlap the upper frame portion 51 when viewed from the front-rear direction.SELECTED DRAWING: Figure 2

Description

The present invention relates to a vehicle having a drive unit including a drive source and a case accommodating the drive source.

In recent years, hybrid vehicles, electric vehicles, fuel cell vehicles, etc. that use an electric motor as a drive source are known. When manufacturing such a vehicle, the electric motor is suspended and assembled to the vehicle. Therefore, for example, Patent Document 1 proposes a technique for providing a hanging hole in an electric motor into which a hook or the like can be inserted.

Japanese Unexamined Patent Publication No. 10-322991

However, the hanging hole described in Patent Document 1 ends its function (role) after the electric motor is assembled to the vehicle. Therefore, there is room for improvement in Patent Document 1 from the viewpoint of effective utilization of the suspension hole after the electric motor is assembled to the vehicle.

An object of the present invention is to provide a vehicle in which a holding portion held when the drive unit is lifted can be effectively utilized even after the drive unit is assembled to the vehicle.

The present invention
A drive unit including a drive source and a case accommodating the drive source,
A vehicle comprising a frame member that supports the drive unit.
The frame member has an upper frame portion extending above the drive unit in the vehicle width direction.
The case has a holding portion that projects upward from the top surface of the case and is held when the drive unit is lifted.
The holding part is
It is arranged with respect to the upper frame portion in the front-rear direction through a predetermined gap.
It is arranged so as to overlap the upper frame portion when viewed from the front-rear direction of the vehicle.

According to the present invention, the holding portion held when the drive unit is lifted can be effectively utilized even after the drive unit is assembled to the vehicle.

It is a schematic side view which shows the whole structure of the vehicle which can mount the drive unit of one Embodiment of this invention. It is a top view which shows the underfloor structure of the vehicle of FIG. It is a front view of the drive unit seen from the front. It is a front view of the subframe and the drive unit seen from the front. It is a perspective view of the subframe and the drive unit seen from the lower left and the front. It is a top view of the subframe and the drive unit seen from above. It is a figure which shows the subframe and the drive unit in the cutting line AA of FIG. 4, and is the figure which shows the positional relationship between the holding part and the upper frame part before a collision. It is a figure which shows the subframe and the drive unit in the cutting line AA of FIG. 4, and is the figure which shows the positional relationship between the holding part and the upper frame part at the time of a collision.

Hereinafter, the drive unit of one embodiment of the present invention and the vehicle of one embodiment equipped with the drive unit will be described with reference to the drawings. In the following description, front / rear, left / right, and up / down are described according to the direction seen from the driver of the vehicle, and in the drawing, the front of the vehicle is Fr, the rear is Rr, the left side is L, the right side is R, and the upper side is shown. U, the lower part is shown as D.

[vehicle]
As shown in FIGS. 1 and 2, the vehicle 1 is divided into a vehicle compartment 4 and a luggage compartment 5 by a floor panel 2 and a dash panel 3, and a front room 6 in front of the passenger compartment 4. The passenger compartment 4 is provided with a front seat 7 and a rear seat 8. The front room 6 is provided with an engine ENG as a drive source for driving the left and right front wheel FWs, and a drive unit accommodating an electric motor MOT as a drive source for driving the left and right rear wheel RWs below the luggage compartment 5. 30 is provided. That is, the vehicle 1 is a so-called hybrid vehicle that uses both the engine ENG and the electric motor MOT as drive sources.

A battery BAT and a fuel tank 9 are arranged below the passenger compartment 4. The battery BAT and the drive unit 30 are connected via a DC line (not shown), and the engine ENG and the fuel tank 9 are connected via a fuel pipe (not shown).

The vehicle body frame 10 includes a pair of left and right side frames 11 and 12 extending in the front-rear direction and a plurality of crosses extending in the vehicle width direction (hereinafter, also referred to as left and right directions) and connecting the side frames 11 and 12. It includes a member 13 and a subframe 14 having a substantially rectangular shape in a plan view that supports the drive unit 30.

[Drive unit]
As shown in FIG. 3, the drive unit 30 converts the electric motor MOT, the case 40 for accommodating the electric motor MOT, the electric power supplied to the electric motor MOT by being electrically connected to the electric motor MOT, and the electric power supplied from the electric motor MOT. The electric power conversion device PDU and the power transmission mechanism TM for transmitting the power of the electric motor MOT to the rear wheel RW are provided. The power converter PDU is, for example, an inverter. The power conversion device PDU is provided with a connector portion 32 to which a DC line connector of a DC line is connected.

The case 40 houses the electric motor MOT and the power transmission mechanism TM inside. A holding portion 41 projecting upward is provided on the upper surface 40u of the case 40. The holding portion 41 is held when the drive unit 30 is lifted, such as when the drive unit 30 is assembled to the vehicle 1.

More specifically, the holding portion 41 has an opening 41a formed in a substantially arc shape connecting two points on the upper surface 40u separated in the vehicle width direction upward and penetrating in the front-rear direction. As a result, a hook or the like can be hooked on the opening 41a from above the case 40 (drive unit 30), and the drive unit 30 can be easily lifted. Further, by providing such an opening 41a, when the holding portion 41 interferes with the upper frame portion 51 and the impact on the holding portion 41 becomes excessive as described later, the holding portion 41 is broken. Can be done.

Further, as shown in FIG. 3, the case 40 is provided with ribs 42 extending on the outer peripheral surface of the case 40 in the vehicle width direction. More specifically, the case 40 has a side wall portion 43 forming the right side surface of the case 40, and a tubular output shaft holding portion 44 protruding from the side wall portion 43 in the rotation axis direction. The output shaft holding unit 44 holds an output shaft (not shown) that transmits the power of the electric motor MOT to the rear wheel RW. The rib 42 is provided so as to extend from the upper surface of the output shaft holding portion 44 to the upper surface 40u through the upper surface of the side wall portion 43 in the vehicle width direction. By providing such a rib 42, the rigidity of the case 40 can be increased.

The holding portion 41 is provided in a state of being connected to the rib 42. By connecting the holding portion 41 and the rib 42, the rigidity of the holding portion 41 can be increased, and the holding portion 41 can be firmly interfered with the upper frame portion 51 described later to reduce the impact applied to the drive unit 30. .. Further, by connecting the holding portion 41 and the rib 42, the holding portion 41 and the rib 42 can be formed together, and the manufacturing cost of the case 40 when the holding portion 41 and the rib 42 are provided can be reduced. Can be planned.

Further, as shown in FIGS. 3 to 6, the case 40 has a fastening portion 45 for fixing the drive unit 30 to the subframe 14. The fastening portion 45 includes a right front fastening portion 45a, a left front fastening portion 45b, and a rear fastening portion 45c.

Specifically, when viewed from the front, the right front fastening portion 45a is provided on the right side of the case 40, and the left front fastening portion 45b is provided on the left side of the case 40. Each of the right front fastening portion 45a and the left front fastening portion 45b has three bolt holes formed from the front to the rear and three boss portions formed around the bolt holes and projecting forward. Further, when viewed from the rear, a rear fastening portion 45c is provided substantially in the center of the case 40. The rear fastening portion 45c has a bolt hole formed from the rear to the front and a boss portion formed around the bolt hole and projecting rearward.

[Sub-frame]
As shown in FIGS. 4 to 7, the subframe 14 includes a front frame member 50 and a rear frame member 60 facing in the front-rear direction, and a left frame member 70 and a right frame member 80 facing in the vehicle width direction (left-right direction). And. The front frame member 50, the rear frame member 60, the left frame member 70, and the right frame member 80 are connected to adjacent frame members (for example, in the case of the front frame member 50, the left frame member 70 and the right frame member 80). .. As a result, the subframe 14 is formed into a substantially rectangular shape in a plan view.

The front frame member 50 includes an upper frame portion 51 extending above the drive unit 30 in the vehicle width direction, and support portions 52 provided on both sides of the upper frame portion 51 in the vehicle width direction.

The upper frame portion 51 is a hollow bar member extending in the vehicle width direction. Further, the support portion 52 includes a right side support portion 521 provided on the right side of the upper frame portion 51 and a left side support portion 522 provided on the left side of the upper frame portion 51 when viewed from the front.

The right side support portion 521 is provided with a bolt hole 521b that communicates with the bolt hole of the right side mount bracket 53a inside the inner wall portion 521a provided so as to surround the outer edge portion of the right side mount bracket 53a.

Similarly, the left side support portion 522 is provided with a bolt hole 522b that communicates with the bolt hole of the left side mount bracket 53b inside the inner wall portion 522a provided so as to surround the outer edge portion of the left side mount bracket 53b.

Further, the rear frame member 60 includes a rear frame portion 61 extending behind the drive unit 30 in the vehicle width direction, and a rear support portion 62 provided substantially in the center of the rear frame portion 61 in the vehicle width direction. The rear support portion 62 includes a circular opening that penetrates the rear frame portion 61 in the front-rear direction, a boss portion that is formed so as to surround the opening and projects the rear frame portion 61 in the front-rear direction, and the like. A rubber mount insulator (not shown) arranged in the opening and a collar 63 held by the mount insulator are provided.

In the present embodiment, the right side support portion 521 and the right front fastening portion 45a are fixed via the right side mount bracket 53a by bolts inserted from the front of the front frame member 50, and the left side support portion 522 is fixed via the left side mount bracket 53b. And the left front fastening portion 45b are fixed. Further, the rear support portion 62 and the rear fastening portion 45c are fixed via the mount insulator and the collar 63 by bolts inserted from the rear of the rear frame member 60. With such a configuration, when a predetermined load or more is input to the subframe 14 at the time of the front collision of the vehicle 1, the drive unit 30 can move forward with respect to the subframe 14 due to inertia.

Further, as shown in FIGS. 4 and 7, the subframe 14 supports the drive unit 30 in a state where the holding portion 41 overlaps with the upper frame portion 51 when viewed from the front-rear direction. Specifically, on the bottom surface of the upper frame portion 51, a first bottom surface portion 51a, a step portion 51b, and a second bottom surface portion 51c are provided in this order from the rear to the front. The first bottom surface portion 51a is formed so as to be substantially horizontal in the front-rear direction, and is located slightly below the upper end portion 41u of the holding portion 41 in the vertical direction. That is, the subframe 14 supports the drive unit 30 in a state where the upper end portion 41u is located above the virtual line L extending horizontally through the first bottom surface portion 51a.

Further, the second bottom surface portion 51c is formed so as to be substantially horizontal in the front-rear direction, and is located further below the first bottom surface portion 51a in the vertical direction to form a lower end portion of the upper frame portion 51. A predetermined gap S1 is provided between the second bottom surface portion 51c and the portion of the upper surface 40u directly below the second bottom surface portion 51c. The step portion 51b is formed between the first bottom surface portion 51a and the second bottom surface portion 51c, and gradually downwards from the first bottom surface portion 51a side to the second bottom surface portion 51c side (that is, from the rear to the front). It is formed to go down.

Further, as shown in FIG. 7, the subframe 14 supports the drive unit 30 in a state where the holding portion 41 is arranged rearward with respect to the upper frame portion 51 via the gap S2.

At the time of the front collision of the vehicle 1 configured in this way, the impact is input to the subframe 14 via the side frames 11 and 12. At this time, when a predetermined load or more is input to the subframe 14 as described above, the drive unit 30 moves forward with respect to the subframe 14 due to inertia, as shown in FIGS. 7 and 8. As shown by the arrow 90 in FIG. 8, when the drive unit 30 moves further forward, the holding portion 41 interferes with the first bottom surface portion 51a of the upper frame portion 51. When the holding portion 41 interferes with the first bottom surface portion 51a, the upper frame portion 51 is deformed, so that the impact applied to the drive unit 30 can be reduced. Then, when the drive unit 30 moves further forward, the holding portion 41 interferes with the step portion 51b of the upper frame portion 51. When the holding portion 41 interferes with the step portion 51b and the impact on the holding portion 41 becomes excessive, the impact applied to the drive unit 30 can be further reduced by breaking the holding portion 41.

Further, as shown in FIG. 7 and the like, the power conversion device PDU is positioned in front of the electric motor MOT and the front frame member 50 in a state where the subframe 14 supports the drive unit 30. Therefore, as shown in FIG. 8, even if the drive unit 30 including the power conversion device PDU moves forward due to inertia at the time of the front collision of the vehicle 1, the power conversion device PDU is prevented from coming into contact with the front frame member 50. can do.

Further, the power conversion device PDU is arranged in front of the electric motor MOT (case 40), that is, on the vehicle interior side. Therefore, even if the vehicle 1 collides forward and the power conversion device PDU moves forward due to inertia, it is possible to prevent the power conversion device PDU from being exposed from the vehicle body of the vehicle 1 by the vehicle interior (for example, the floor panel 2).

Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and can be appropriately modified, improved, and the like.
For example, in the above embodiment, the hybrid vehicle using the engine ENG and the electric motor MOT as the drive source is exemplified, but the electric vehicle may be an electric vehicle whose drive source is only the electric motor MOT.
Further, the arrangement positions of the battery BAT and the fuel tank 9 are not limited to the example of the above embodiment, and for example, the arrangement positions of the battery BAT and the fuel tank 9 may be exchanged in the example of FIG. Further, in the case of an electric vehicle, it is not necessary to provide the fuel tank 9.

Further, in the above embodiment, the example in which one holding portion 41 is provided in the case 40 has been described, but a plurality of holding portions may be provided at different positions in consideration of the position of the center of gravity of the drive unit 30 and the like. In this way, the drive unit 30 can be stably lifted by holding the plurality of holding portions.
Further, in the above embodiment, an example in which the holding portion 41 of the case 40 accommodating the electric motor MOT is effectively utilized is illustrated, but the holding portion of the case accommodating another drive source such as the engine ENG is similarly used as the holding portion 41. The same effect can be obtained by interfering with the frame member.
Further, in the above embodiment, the drive unit 30 accommodating the electric motor MOT is arranged at the rear part of the vehicle 1, but the drive unit 30 is arranged in the front room 6 and the electric motor MOT is used as a drive source for driving the left and right front wheel FWs. You may.
Further, in the above embodiment, the example in which the upper frame portion 51 is used as a hollow bar member has been described, but the present invention is not limited to this, and for example, the upper frame portion 51 may be used as a solid bar member.

At least the following matters are described in this specification. The components and the like corresponding to the above-described embodiments are shown in parentheses, but the present invention is not limited to these.

(1) A drive unit (drive unit 30) including a drive source (electric motor MOT) and a case (case 40) accommodating the drive source.
A vehicle (vehicle 1) including a frame member (front frame member 50) that supports the drive unit.
The frame member has an upper frame portion (upper frame portion 51) extending above the drive unit in the vehicle width direction.
The case has a holding portion (holding portion 41) that projects upward from the upper surface (upper surface 40u) of the case and is held when the drive unit is lifted.
The holding part is
It is arranged in the front-rear direction with respect to the upper frame portion through a predetermined gap (gap S2).
A vehicle arranged so as to overlap the upper frame portion when viewed from the front-rear direction of the vehicle.

According to (1), the holding portion provided in the case is arranged so as to overlap the upper frame portion arranged in the front-rear direction of the vehicle through a predetermined gap when viewed from the front-rear direction. Therefore, when the case is displaced in the front-rear direction with respect to the upper frame portion due to a vehicle collision or the like, the holding portion interferes with the upper frame portion, so that the impact applied to the drive unit can be reduced. The holding part held when the drive unit is lifted ends its function after the drive unit is assembled to the vehicle, but has a function of a cushioning material that reduces the impact applied to the drive unit in the event of a vehicle collision or the like. By making it possible, the holding unit can be effectively used.

(2) The vehicle according to (1).
The holding portion is arranged rearward with respect to the upper frame portion in the front-rear direction via the predetermined gap.
The frame member has support portions (support portions 52) for supporting the drive unit on both sides of the upper frame portion in the vehicle width direction.
The support portion is a vehicle that supports the drive unit on the front surface of the frame member.

According to (2), since the support portion supports the drive unit on the front surface of the frame member, the drive unit moves forward with respect to the upper frame member due to inertia at the time of front collision. At this time, the impact applied to the drive unit can be reduced by the holding portion interfering with the upper frame portion, and the impact applied to the drive unit can be further reduced by breaking the holding portion when the impact becomes excessive.

(3) The vehicle according to (2).
The holding portion is a vehicle in which the outer peripheral surface of the case is connected to a rib (rib 42) extending in the vehicle width direction.

According to (3), since the holding portion is connected to the rib extending on the outer peripheral surface of the case in the vehicle width direction, the rigidity of the holding portion can be increased, and the holding portion can be firmly interfered with the upper frame portion. The impact applied to the drive unit can be reduced. Further, since the holding portion is connected to the rib, the holding portion and the rib can be formed together, and the manufacturing cost of the case can be reduced.

(4) The vehicle according to (2) or (3).
The drive source is a rotary electric machine (electric motor MOT).
The drive unit further includes a power conversion device (power conversion device PDU) that converts the electric power supplied to the rotary electric machine and the electric power supplied from the rotary electric machine.
The drive unit includes a front frame member (front frame member 50) and a rear frame member (rear frame member 60) facing in the front-rear direction, and a left frame member (left frame member 70) and a right facing in the vehicle width direction. The frame member (right frame member 80) is supported by a subframe (subframe 14) connected in a substantially rectangular shape in a plan view.
The frame member is the front frame member and
The power conversion device is a vehicle located in front of the rotary electric machine and the front frame member.

According to (4), since the power conversion device is located in front of the rotary electric machine and the front frame member, it is possible to prevent the power conversion device from coming into contact with the front frame member at the time of front collision.

(5) The vehicle according to (4).
The electric power conversion device is a vehicle arranged on the vehicle interior side of the rotary electric machine.

According to (5), since the power conversion device is arranged closer to the passenger compartment than the rotary electric machine, it is possible to prevent the power conversion device from being exposed from the vehicle body at the time of a front collision.

(6) The vehicle according to any one of (1) to (5).
The holding portion is a vehicle having an opening (opening 41a) penetrating in the front-rear direction.

According to (6), since the holding portion is provided with an opening, the hook can be hooked, and the holding portion can be broken when the impact becomes excessive.

1 Vehicle 4 Vehicle interior 14 Subframe 30 Drive unit 40 Case 40u Top surface 41 Holding part 41a Opening 42 Rib 45 Fastening part 50 Front frame member 51 Upper frame part 52 Support part 60 Rear frame member 70 Left frame member 80 Right frame member MOT Motor PDU power converter S2 gap

Claims (6)

A drive unit including a drive source and a case accommodating the drive source,
A vehicle comprising a frame member that supports the drive unit.
The frame member has an upper frame portion extending above the drive unit in the vehicle width direction.
The case has a holding portion that projects upward from the top surface of the case and is held when the drive unit is lifted.
The holding part is
It is arranged with respect to the upper frame portion in the front-rear direction through a predetermined gap.
A vehicle arranged so as to overlap the upper frame portion when viewed from the front-rear direction of the vehicle. The vehicle according to claim 1.
The holding portion is arranged rearward with respect to the upper frame portion in the front-rear direction via the predetermined gap.
The frame member has support portions for supporting the drive unit on both sides of the upper frame portion in the vehicle width direction.
The support portion is a vehicle that supports the drive unit on the front surface of the frame member. The vehicle according to claim 2.
The holding portion is a vehicle in which the outer peripheral surface of the case is connected to a rib extending in the vehicle width direction. The vehicle according to claim 2 or 3.
The drive source is a rotary electric machine.
The drive unit further includes a power conversion device that converts electric power supplied to the rotary electric machine and electric power supplied from the rotary electric machine.
The drive unit is formed by a subframe in which the front frame member and the rear frame member facing in the front-rear direction and the left frame member and the right frame member facing in the vehicle width direction are connected in a substantially rectangular shape in a plan view. Supported,
The frame member is the front frame member and
The power conversion device is a vehicle located in front of the rotary electric machine and the front frame member. The vehicle according to claim 4.
The electric power conversion device is a vehicle arranged on the vehicle interior side of the rotary electric machine. The vehicle according to any one of claims 1 to 5.
The holding portion is a vehicle having an opening that penetrates in the front-rear direction.

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