JP7348851B2 - electric vehicle - Google Patents

Description

The present invention relates to an electric vehicle that travels by transmitting rotational power generated by electric power to drive wheels.

Conventionally, in vehicles called one-box cars, for example, by adopting a so-called cab-over structure in which the front seats (driver's seat and passenger's seat) are placed above the engine, the vehicle can be accommodated within the limited external dimensions. Efforts have been made to maximize interior space. In the one-box car, the floor panel forming the floor surface of the vehicle compartment is raised below the front seat in order to maximize the interior space.

Recently, the number of electric vehicles has been increasing due to environmental measures such as reducing carbon dioxide emissions. However, an electric vehicle does not have an engine, but instead has a driving motor and a driving battery, and also has electronic equipment such as a power control unit (also referred to as PCU) for controlling these. Further, the above-mentioned batteries are designed to have a large capacity so that they can be charged and discharged with power that can withstand practical use. For this reason, electric vehicles sometimes require a larger storage space than engine vehicles. Therefore, an electric vehicle has been disclosed that has a lower floor and a flat floor while securing a space for storing electronic devices and batteries (for example, Patent Document 1).

JP2019-73222A

In the above-mentioned Patent Document 1, although a one-box type vehicle is designed to have a low floor and a flat floor, electronic devices such as a PCU, a DC/DC converter, and an on-board charger (also referred to as an on-board charger or OBC) is laid out flat.

By the way, electric vehicles have high-voltage cables that connect electronic devices such as those described above to batteries and drive motors. The high voltage cable used is relatively thick and has high bending rigidity so as to withstand high voltage. However, in the electric vehicle of Patent Document 1, the electronic device, the motor, and the battery are arranged adjacent to each other, and there is a problem in that it is difficult to secure extra length for the high voltage cable. As a result, when connecting high-voltage cables, wiring restrictions have arisen, such as making it difficult to bend the cables. Further, when electronic devices are arranged flat, it is difficult to secure a space between them and a side member provided on the side of the vehicle. Therefore, in the event of a side collision, the side member invades the electronic device, causing interference between the electronic device and the side member. Further, when the electronic devices are arranged in a flat manner, a large space is required to accommodate the electronic devices, which causes a problem that the space for accommodating the driving battery is reduced. As a result, there is a problem that electricity costs become worse.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an electric vehicle that can secure an extra length of a high voltage cable that connects an electronic device such as a PCU and a drive motor. Another object of the present invention is to provide an electric vehicle that can secure a space for accommodating electronic equipment, protect the electronic equipment in the event of a collision, and secure a space for accommodating a driving battery.

(1) An electric vehicle of the present invention provided to solve the above-mentioned problems is an electric vehicle in which a plurality of electronic devices are mounted on the vehicle, and the vehicle has a floor portion forming a floor surface of a vehicle interior. , a pair of side members formed on both sides of the vehicle compartment, and at least one cross member formed below the floor portion in a direction intersecting the side members; It is fixed to a cross member, and is characterized in that the electronic devices are arranged so as to be stacked vertically via brackets.

The electric vehicle of the present invention includes a floor part forming a floor surface of a vehicle interior, a pair of side members formed on both sides of the vehicle interior, and a pair of side members formed below the floor part in a direction intersecting with the side members. and at least one cross member, and the electronic device is fixed to the cross member. Thereby, the electronic device is protected by the side member from a collision from the side. Furthermore, since the electronic device is fixed to the cross member, the electronic device is protected by the cross member from collisions in the front and rear directions. Furthermore, since the electronic devices of the present invention are stacked vertically via the brackets, a space for housing the electronic devices can be secured. Further, extra length of cables such as high voltage cables can be secured in the vertical direction. This eliminates restrictions on high voltage cable wiring. Additionally, in vehicles that have a vertical space under the front seat, such as a one-box type vehicle, this space can be used to store electronic devices, reducing dead space. .

(2) The electric vehicle of the present invention provided to solve the above problems includes a plurality of first electronic devices fixed to the cross member and arranged to be vertically stacked via the brackets. and a second electronic device arranged at a different position from the first electronic device, and the wiring of the second electronic device is arranged to pass between the brackets.

The electric vehicle of the present invention includes a plurality of first electronic devices that are fixed to the cross member and arranged so as to be vertically stacked via the bracket. As a result, the first electronic devices, such as a PCU, a DC/DC converter, and an on-board charger (also referred to as an on-board charger or OBC), are stacked vertically via the brackets. They are stored together on the upper side. Further, extra length of cables such as high voltage cables wired to the first electronic device can be secured. Additionally, in vehicles that have a vertical space under the front seat, such as a one-box type vehicle, this space can be used to store electronic devices, reducing dead space. .

Further, the electric vehicle of the present invention includes a second electronic device disposed at a different position from the first electronic device, and the wiring of the second electronic device passes between the brackets. Here, the second electronic device is, for example, an electronic device such as a vacuum pump or an electric air compressor, and is arranged at a different position from the first electronic device described above. Therefore, a low power cable, such as a 12V power supply, which is connected to the second electronic device, can be passed between the brackets. As a result, the cable is surrounded and protected by the bracket, so that interference between the cable and various vehicle components including the above-mentioned electronic equipment can be suppressed in the event of a vehicle collision.

(3) The electric vehicle of the present invention provided to solve the above-mentioned problems has an electronic device disposed adjacent to a motor or a transaxle, and of the electronic device, a power control unit is connected to the motor or transaxle. It is characterized by being located above the transaxle.

According to this configuration, the power control unit of the electronic device is located above the motor or transaxle, so that the extra length and bending radius of cables such as high voltage cables can be secured upward. . Furthermore, since the PCU and the motor or transaxle can be placed close to each other, efficient wiring can be performed while ensuring a minimum extra length.

(4) In the electric vehicle of the present invention provided to solve the above-mentioned problems, the cross member includes a first cross member and a second cross member that are spaced apart from each other in the longitudinal direction of the vehicle, and It is desirable that the electronic device be located in an area surrounded by the pair of side members, the first cross member, and the second cross member.

According to this configuration, since the electronic device is located in an area surrounded by the pair of side members and the first cross member and the second cross member, the electronic device is protected in the event of a collision.

(5) In the electric vehicle of the present invention provided to solve the above-mentioned problems, the cross member includes a first cross member and a second cross member that are spaced apart from each other in the longitudinal direction of the vehicle; It is desirable that either the first cross member or the second cross member be located on the front side of the electronic device.

According to this configuration, the electronic device is protected by the cross member located on the front side with respect to the electronic device. Thereby, the electronic equipment can be protected from the impact when the vehicle collides with the front side.
(6) In the electric vehicle of the present invention provided to solve the above-mentioned problems, one of the first cross member and the second cross member is fixed to the lower side of the side member, and the electric vehicle is fixed to the lower side of the side member. It is desirable that electronic equipment be fixed.

According to this configuration, the position of the electronic devices can be lowered, so that the electronic devices can be further stacked in the vertical direction. Therefore, extra length of cables such as high-voltage cables wired to electronic equipment can be secured. Further, by locating the side members and the cross member on the sides of the electronic device, the electronic device can be protected against impacts from the side.

According to the present invention, it is possible to provide an electric vehicle that can secure an extra length for a high voltage cable that connects an electronic device such as a PCU and a drive motor. Further, according to the present invention, it is possible to provide an electric vehicle that can secure a space for accommodating electronic equipment, protect the electronic equipment in the event of a collision, and secure a space for accommodating a driving battery.

1 is a left side view schematically showing the configuration of a vehicle according to an embodiment of the present invention. FIG. 1 is a right side view schematically showing the configuration of a vehicle according to an embodiment of the present invention. FIG. 2 is a plan view schematically showing the configuration of the main parts of the vehicle as viewed from the first stage of electronic equipment. FIG. 2 is a plan view schematically showing the configuration of the main parts of the vehicle as seen from the second stage of electronic equipment. FIG. 2 is a plan view schematically showing the configuration of the main parts of the vehicle as seen from the third stage of electronic equipment. FIG. 2 is a schematic left side sectional view enlarging the main part of FIG. 1; FIG. 5 is an enlarged schematic plan view of the main part of FIG. 4. FIG.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the accompanying drawings. Note that the scale is different from the actual scale for ease of explanation.

FIG. 1 is a diagrammatically simplified left side view of an electric vehicle 1 (also referred to as vehicle 1) of the present invention viewed from the left. FIG. 2 is a right side view of the vehicle 1 viewed from the right side. 3 to 5 schematically depict plan views of the vehicle 1, and hierarchically represent the housing state of a first electronic device 56, which will be described later. As shown in FIGS. 1 to 7, the electric vehicle 1 of the present invention travels by transmitting rotational power generated by electric power to drive wheels. In the present embodiment, the vehicle 1 is equipped with a motor 2 as a drive source for driving, and travels by transmitting rotational power generated by supplying electric power to the motor 2 to drive wheels. Furthermore, the vehicle 1 illustrated in this embodiment is a one-box type vehicle that employs a cab-over structure.

The vehicle 1 includes a pair of side members 10L and 10R at the bottom of the vehicle body 3. The side members 10L and 10R are configured symmetrically, and extend in the front-rear direction, spaced apart from each other in the vehicle width direction (left-right direction). The side members 10L and 10R are arranged substantially parallel to each other on both sides in the longitudinal direction, but are bent at the intermediate portion and get closer to each other toward the front side of the vehicle.

As shown in FIGS. 3 to 7, the region formed between the side members 10L and 10R can be roughly classified into three regions: a rear region 16, an intermediate region 17, and a front region 18. . The rear side region 16 is a region formed on the rear side of the vehicle 1 in a portion where the side members 10L and 10R are arranged substantially parallel to each other with a predetermined interval therebetween. The rear region 16 is a substantially rectangular region. Further, the intermediate region 17 is a region formed between the side members 10L and 10R at an intermediate portion thereof. The intermediate region 17 is formed at a portion where the side members 10L, 10R are inclined so that the distance between them becomes narrower toward the front than in the rear region 16. Therefore, unlike the rear region 16, the intermediate region 17 is a substantially trapezoidal region. The front side region 18 is a region formed on the front side of the vehicle 1 with respect to the intermediate region 17 at a portion where the side members 10L and 10R are arranged substantially in parallel. The front side area 18 has a substantially rectangular shape like the rear side area 16, but since the interval between the side members 10L and 10R is narrower than that in the rear side area 16, the front side area 18 has a substantially rectangular shape than the rear side area 16. It is said to be a small area.

A first cross member 11a that constitutes the vehicle 1 of the present invention is provided in the intermediate region 17 along the vehicle width direction. Further, a second cross member 11b is provided at a predetermined distance from the first cross member 11a on the rear side of the vehicle. The first cross member 11a and the second cross member 11b span in a direction intersecting the side members 10L and 10R. Further, the first cross member 11a is located on the front side of the vehicle with respect to the second cross member 11b, and both ends of the first cross member 11a abut against the inner surfaces of the side members 10L and 10R via a suitable support frame (not shown). It is concluded as follows.

A floor panel 13 is provided on the side members 10L and 10R. The floor panel 13 is arranged so as to straddle the side members 10L and 10R. The floor panel 13 is fixed to the upper surface of the side member 10 by, for example, being joined by welding. A vehicle compartment 14 is provided above the floor panel 13. At the front end of the vehicle interior 14, a front seat 15 consisting of a driver's seat and a passenger's seat arranged side by side in the vehicle width direction is arranged. The floor panel 13 (also referred to as the floor section 13) is formed to extend at least from the foot of the front seat 15 to the rear end of the vehicle compartment 14. Further, a space portion 13 a projecting inwardly with respect to the vehicle interior 14 is formed on the floor surface of the floor panel 13 below the front seat 15 . That is, the space portion 13a is formed to protrude upward from the side members 10L, 10R. Thereby, the space 13a forms a three-dimensional shell, and the strength of the space 13a can be increased. In this embodiment, the space portion 13a is formed near the intermediate portion in the longitudinal direction of the vehicle.

As shown in FIGS. 3 to 5, the vehicle 1 includes a drive device 20 that transmits rotational power generated by electric power to front wheels 31L and 31R, which are drive wheels. The drive device 20 includes a motor 2 for outputting rotational power, and a transaxle 32 for transmitting the rotational power output from the motor 2 to front wheels 31L and 31R.

In the vehicle 1, the motor 2 is located on the front side with respect to the space 13a and is disposed below the floor panel 13. As the motor 2, a motor generator equipped with a power generation function can be used. As shown in FIG. 1, the motor 2 is disposed and fixed in a vertical position, with the output shaft 23 extending forward from the motor body 24 in the front-rear direction. Further, the motor 2 is arranged on the front side of the first cross member 11a in the front side region 18 formed between the side members 10L and 10R. Further, as shown in FIG. 6, a mount 25 is provided on the rear side of the vehicle with respect to the motor 2, and the mount 25 is fastened to a support frame 52 provided below the first cross member 11a. and is supported by the vehicle body 3. Therefore, the mount 25 is arranged below the first cross member 11a. As a result, at least a portion of the motor 2 is located below the first cross member 11a when the vehicle 1 is viewed in the longitudinal direction. Note that at least a portion of the motor 2 overlaps the mount 25 when the vehicle 1 is viewed in the longitudinal direction, and at least a portion of the motor 2 overlaps the first cross member 11a when the vehicle 1 is viewed in the longitudinal direction. It may be something that Further, the above-mentioned support portion 12 is arranged on the vehicle rear side of the mount 25. Therefore, when a front side collision occurs, the impact received from the mount 25 can be suppressed by the support part 12 being stretched between the first cross member 11a and the second cross member 11b.

As shown in FIGS. 1 to 5, a PCU 34 (also referred to as a Power Control Unit 34) and an on-board charger 36 are installed inside a space 13a formed in an intermediate region 17 of the floor panel 13. 36 or OBC 36), a DC/DC converter 55, etc. (hereinafter also collectively referred to as the first electronic device 56). Further, above the motor 2, a vacuum pump 51 (also referred to as a second electronic device 51) is provided. The vacuum pump 51 is used to generate negative pressure for the brake and amplify the force with which the driver applies the brake.

The PCU 34 is used to control voltage and the like for driving the motor 2. Further, the DC/DC converter 55 converts the voltage of a battery 35, which will be described later, to a voltage for charging an auxiliary equipment battery (not shown). Here, the battery for auxiliary equipment is used, for example, for headlamps, electrical equipment used at low voltage, and the like. The on-vehicle charger 36 charges the drive battery 35 by converting between AC and DC and boosting the voltage. Further, a high voltage cable 39a is connected between the PCU 34, the motor 2, the DC/DC converter 55, the on-vehicle charger 36, the battery 35, and the like. The high voltage cable 39a has a relatively large diameter and high bending rigidity so as to be able to withstand high voltage.

The transaxle 32 is arranged in front of the motor 2 in the front region 18 . Further, the transaxle 32 is arranged adjacent to the first electronic device 56 on the front side of the vehicle. Further, among the first electronic devices 56, the PCU 34 is arranged above the motor 2. Thereby, the extra length and bending radius of the high voltage cable 39a can be increased. Here, the transaxle 32 includes a differential gear that distributes the power of the motor 2 to front wheels 31L and 31R, which are left and right drive wheels, and has the same configuration as a conventionally known one. The differential gear includes two side gears that mesh with two pinion gears that are rotatably provided within the differential case, and a ring-shaped ring gear that is fixed to the differential case. One end portions of the left and right drive shafts 37L, 37R are inserted into the differential case, and the one end portions are each connected to a side gear. Further, a ring-shaped ring gear surrounding the outer periphery of the differential case is fixed to the differential case.

The differential gear is coupled to the motor 2 so as to be capable of transmitting power. Specifically, as shown in FIG. 1, a bevel gear 38 is fixed to the output shaft 23 of the motor 2. The bevel gear 38 meshes with diagonal teeth formed on the ring gear. As a result, the differential case rotates together with the ring gear due to the power of the output shaft 23 of the motor 2. Then, the rotation of the differential case is converted to the rotation of each side gear via the pinion gear, and the left and right drive shafts 37L, 37R rotate together with each side gear, and the rotation of the drive shafts 37L, 37R is transmitted to the front wheels 31L, 31R, respectively. be done. In this way, the transaxle 32 can transmit the power of the motor 2 to the drive wheels using the above-mentioned differential gear, drive shafts 37L, 37R, and the like.

As shown in FIGS. 1, 2, 6, etc., the second cross member 11b is fastened to the side members 10L, 10R at both ends via support frames supported on the lower sides of the side members 10L, 10R. ing. Therefore, the second cross member 11b is arranged below the first cross member 11a. As a result, the first cross member 11a is located on the front side of the first electronic device 56, and the first cross member 11a is arranged to face the front side of the first electronic device 56. Further, a portion of the first cross member 11a overlaps with the first electronic device 56 in the height direction. Therefore, since the first electronic device 56 is located in an area surrounded by the side members 10L and 10R, the first cross member 11a, and the second cross member 11b, it is protected against impacts from the front-rear direction and the left-right direction. The first electronic device 56 is protected. Further, since the mounting position of the first electronic device 56 can be lowered, it becomes possible to stack the first electronic device 56 vertically. In addition, by disposing the first cross member 11a on the front side of the first electronic device 56, when the vehicle 1 receives an impact from the front side due to a rear-end collision, etc., the first electronic device 56 is Intrusion into the front side of 1 can be suppressed. Further, other members mounted on the front side of the vehicle 1, such as the motor 2, can be prevented from invading the first electronic device 56 due to impact from the front.

Further, as shown in FIGS. 2, 3, 6, etc., a support portion 12 to which the first electronic device 56 is fixed is formed between the first cross member 11a and the second cross member 11b. . As shown in FIG. 3, the support part 12 has three support frames attached across the first cross member 11a and the second cross member 11b so that the surface on which the first electronic device 56 is fixed is approximately horizontal. is formed. The support part 12 can further enhance the durability of the accommodation space by being stretched between the first cross member 11a and the second cross member 11b against impact from the front direction. The first electronic device 56 is mounted on the support section 12 and fixed to the support section 12 via the bracket 26 . Therefore, the first electronic device 56 is housed in a housing space that ensures high durability against impact from the front, so even if it receives a collision from the front, the first electronic device 56 will not be destroyed. Provides a durable vehicle body structure.

As shown in FIGS. 3 to 5, in the vehicle 1 of this embodiment, the first electronic devices 56 include the on-vehicle charger 36 in the first stage, the DC/DC converter 55 in the second stage, and the PCU 34 in the top stage. Part or all of the stacked layers are arranged inside the space 13a so as to form tiers. Further, among the first electronic devices 56, the PCU 34 located at the top stage is connected to the motor 2 by a high voltage cable 39a. As a result, in the high-voltage cable 39a having high bending rigidity, it is possible to increase the extra length of the cable in the height direction, so that the bending radius (also referred to as radius) can also be increased. Therefore, restrictions on wiring the high voltage cable 39a are eliminated.

The on-vehicle charger 36, the DC/DC converter 55, and the PCU 34 are stacked on top of each other via brackets 26, and the lowest on-vehicle charger 36 is fixed to the support portion 12 via the brackets 26. The stacking order of these first electronic devices 56 can be arbitrary depending on the shape and wiring, but as described above, it is important to ensure the extra length of the high voltage cable 39a and to increase the bending radius. It is desirable to arrange the PCU 34 at the top. Note that the first electronic device 56 may be directly mounted on one or both of the first cross member 11a and the second cross member 11b, or indirectly mounted via the bracket 26 or the like. It's okay.

Further, the first electronic device 56 is arranged above the motor 2 and the transaxle 32. Thereby, when the vehicle 1 receives an impact from the front side, it is possible to suppress the drive device 20 from interfering with the first electronic device 56. Specifically, the mount 25 is first damaged by the impact from the front side, and as a result, the drive device 20 slips under the first electronic device 56, so that the drive device 20 and the first electronic device 56 are damaged. interference can be suppressed. Moreover, by arranging the first electronic device 56 above the transaxle 32, it is possible to prevent the first electronic device 56 from being submerged in water when the vehicle 1 is submerged in water.

The battery 35 is disposed between the side members 10L and 10R in the rear region 16 located on the rear side with respect to the space 13a where the first electronic device 56 is disposed. Further, a vacuum pump 51 is arranged on the motor 2 near the front of the vehicle, and a first electronic device 56 is arranged inside the space 13a. Thereby, a large space for mounting the battery 35 on the rear side of the vehicle can be secured, and the capacity of the battery 35 can be increased. The battery 35 has a large number of battery cells 35a arranged in a single stage vertically and arranged in a horizontal direction (in the present embodiment, the vehicle width direction and the vehicle longitudinal direction). The battery 35 is arranged in a substantially rectangular rear region 16 that extends linearly on the rear side of the vehicle and is formed between the side members 10L and 10R that are arranged substantially in parallel. Therefore, the battery 35 also has a height (thickness) that can accommodate the battery cells 35a, and has a substantially rectangular external shape in plan view. Therefore, the battery 35 mounted on the vehicle 1 has battery cells 35a arranged with almost no dead space inside, and has a high capacity despite being thin.

As described above, in the vehicle 1, the first cross member 11a and the second cross member 11b are provided so as to have relatively different heights, so that the distance between the first cross member 11a and the second cross member 11b A vertical storage space is ensured. Therefore, the first electronic device 56 can be accommodated within the accommodation space. Moreover, by arranging the first cross member 11a in front of the first electronic device 56 (above the second cross member 11b) instead of arranging it at the center of gravity of the first electronic device 56 itself, It becomes closer to the center of gravity of the electronic device 56 and becomes stable. As a result, the center of gravity of the first electronic device 56 is located at a low position, so that the attachment state of the first electronic device 56 is stabilized. Furthermore, it is possible to reduce the wobbling and vibration of the first electronic device 56 due to gravitational acceleration (also referred to as G) accompanying acceleration of the vehicle 1. In addition, since the accommodation space can receive impacts from the front and back directions by the first cross member 11a and the second cross member 11b, high durability against front and rear impacts is ensured.

Further, in this embodiment, the first cross member 11a is arranged below the space 13a. Therefore, by mounting the motor 2 on the mount 25 provided on the lower side of the first cross member 11a, the vacuum pump 51 supported on the upper part of the motor 2 can be accommodated inside the space 13a. Further, the first electronic device 56 can be mounted in a space on the rear side of the vehicle with respect to the first cross member 11a. As a result, the first cross member 11a can be positioned in front of the first electronic device 56, and the first electronic device 56 can be protected from impact from the front when the vehicle 1 collides with the front. can. Moreover, since the first electronic device 56 can be located below the space 13a, part or all of the stacked first electronic devices 56 can be accommodated inside the space 13a. Further, by passing, for example, a low power wiring 39b connected to the vacuum pump 51 or the like between the brackets 26, the wiring 39b is protected by the bracket 26. That is, since the wiring 39b is surrounded by the bracket 26, the impact received when the vehicle 1 collides can be suppressed from reaching the wiring 39b.

As shown in FIGS. 3 to 5 and 7, an electric air compressor 33 is disposed in the vehicle 1 on the side of the above-mentioned motor 2 and on the front side of the vehicle with respect to the first cross member 11a. The electric air compressor 33 is for air-conditioning the vehicle interior, and is arranged at a position adjacent to the motor 2 in the vehicle width direction. The electric air compressor 33 is connected to one end of a high voltage cable (not shown) on the rear side of the vehicle.

As described above, in the vehicle 1 of this embodiment, the drive device 20 including large members such as the motor 2 and the transaxle 32 is arranged in front of the battery 35. Therefore, in the vehicle 1 of this embodiment, it is easier to secure the cabin floor than when the drive device 20 is disposed on the rear side. Furthermore, by arranging the first electronic device 56 inside the space 13a formed in the intermediate region 17 of the vehicle 1, the first electronic device 56 is not dispersed and is housed in one place. . Therefore, compared to the case where the first electronic device 56 is provided in the rear region 16 of the vehicle 1, a larger storage space for the battery 35 can be secured, and the trunk of the vehicle 1 can be made wider. Thereby, the capacity of the battery 35 can be increased, and the travel time of the vehicle 1 can be extended.

In addition, by consolidating the first electronic devices 56 in the space 13a, the high voltage cable 39a connecting between the PCU 34, the DC/DC converter 55, and the on-vehicle charger 36 can be minimized in length, and the remaining length and It is possible to ensure the bending radius. Further, since the first electronic device 56, the motor 2, and the battery 35 can be arranged close to each other, it is possible to minimize the length of the high voltage cable 39a while ensuring the extra length and bending radius. This facilitates wiring work, reduces cost, reduces weight, and suppresses power loss. Further, since the first electronic device 56 is surrounded by the shell-shaped space 13a formed three-dimensionally, when the vehicle 1 receives an impact from the front, the first electronic device 56 is surrounded by the space 13a. protected by In addition, since the space portion 13a has the side members 10L and 10R formed on both sides, even if the vehicle 1 receives an impact from the side, the first electronic device 56 is connected to the side members 10L and 10R. , the first cross member 11a and the second cross member 11b.

In the vehicle 1 of this embodiment, the output shaft 23 of the motor 2 is arranged vertically in front or behind the transaxle 32 so as to extend in the front-rear direction. By employing such a configuration, the vehicle 1 has a lower cabin floor. That is, if the motor 2 is arranged vertically as described above, the output shaft 23 of the motor 2 will extend in the front-rear direction. Therefore, a bevel gear 38, which is an orthogonal shaft gear, is used to connect the output shaft 23 of the motor 2 and the ring gear of the transaxle 32. Therefore, by arranging the motor 2 vertically as described above, it does not require a large installation space unlike when the motor 2 is placed horizontally, and the floor of the vehicle interior 14 can be lowered accordingly.

Further, as described above, in the vehicle 1 of the present embodiment, the battery 35 is arranged in the rear region 16 between the pair of side members 10L and 10R and on the rear side of the vehicle 1. Since the distance between the side members 10L and 10R is larger in the rear region 16 than in the front region 18 and the intermediate region 17, even a large capacity battery 35 can be arranged without increasing the size in the vertical direction. Specifically, the battery 35 is configured such that a plurality of chargeable and dischargeable battery cells 35a are arranged in a single stage in the vertical direction and arranged in a plurality of rows in the horizontal direction. Furthermore, in the rear region, since the pair of side members 10L and 10R are arranged substantially parallel to each other, a dead space is less likely to occur due to the arrangement of the battery 35. Therefore, in the vehicle 1 described above, the battery 35 having a substantially rectangular shape in plan view can be mounted, and a high-capacity battery 35 can be adopted without increasing the size of the battery 35 in the vertical direction. Therefore, according to the above-described configuration, it becomes easier to lower the vehicle interior floor. Moreover, if the battery 35 is thin and has a large surface area as described above, a high effect can be expected in improving the cooling efficiency of the battery cell 35a and the charging/discharging efficiency.

In addition, in this embodiment, an example was shown in which the battery 35 employs a single stage of chargeable and dischargeable battery cells 35a arranged in a vertical direction and a plurality of them arranged in a row in a horizontal direction. It is not limited to this. For example, the battery 35 may be one in which battery cells 35a are stacked in multiple stages in the vertical direction. Further, in the above-described embodiment, an example was shown in which the battery 35 had a substantially rectangular shape in plan view, but it may have another shape.

Furthermore, in the vehicle 1 described above, the electric air compressor 33 electrically connected to the battery 35, the first electronic device 56, and the drive device 20 are arranged in front of the battery 35. ing. Furthermore, a first electronic device 56 is arranged between the drive device 20 and the battery 35. According to this arrangement, the high voltage cable 39a that connects the first electronic device 56 and the battery 35 and the high voltage cable 39a that connects the motor 2 of the drive device 20 and the battery 35 are concentrated in front of the battery 35. can be done. Moreover, the high voltage cable 39a connecting the electric air compressor 33 and the battery 35 can also be concentrated on the front side near the battery 35. As a result, effects such as simplifying the wiring of the high voltage cable 39a and the wiring 39b in the vehicle 1 and reducing the space required for wiring the high voltage cable 39a and the wiring 39b are expected. can. Further, in the manufacturing process of the vehicle 1, the work of wiring the high voltage cable 39a and wiring 39b can be simplified.

In this embodiment, the space portion 13a is provided in the intermediate region 17 of the vehicle 1, but the present invention is not limited to this. For example, it may be a vehicle in which the space portion 13a is not formed. Further, the space 13a may be formed in the front region 18 or the rear region 16. Further, in this embodiment, the space portion 13a is formed in a substantially rectangular shape, but the space portion 13a may have a shape other than the rectangular shape. Further, the amount of upward protrusion of the space portion 13a can also be set arbitrarily.

Further, in this embodiment, a plurality of first electronic devices 56 are arranged inside the space 13a, but one first electronic device 56 may be arranged. Further, in this embodiment, the plurality of first electronic devices 56 are stacked in the vertical direction, but the first electronic devices 56 are stacked in the horizontal direction as long as the extra length and bending radius of the high voltage cable 39a can be secured. They may be arranged in parallel. Further, the first electronic device 56 may use a combination of vertical stacking and horizontal stacking as long as the extra length and bending radius of the high voltage cable 39a can be ensured. Further, the first electronic device 56 may be entirely housed in the space 13a, or may be partially housed in the space 13a.

Further, in the present embodiment, the first electronic device 56 is supported by the support portion 12 via the bracket 26, but the first electronic device 56 can be supported by any suitable method. Further, in this embodiment, the support portion 12 and the bracket 26 are formed as separate members, but the support portion 12 and the bracket 26 may be formed as one piece. The bracket 26 can have any shape depending on the shape of the first electronic device 56. Moreover, the brackets 26 between the first electronic devices 56 arranged in a stack can be eliminated if necessary. In this case, the first electronic devices 56 may be directly connected to each other. Furthermore, the order in which the first electronic devices 56 are stacked can be arbitrary. Note that, since the high voltage cable 39a is often used mainly to connect the motor 2 and the PCU 34, it is desirable to arrange the PCU 34 at the top in order to have a large excess length of the cable.

In this embodiment, for example, a vacuum pump is illustrated as the second electronic device 51, but various electronic devices can be employed as the second electronic device 51. Further, the second electronic device 51 can be placed at any position, but when connected to the first electronic device 56, it may be placed close to the first electronic device 56. Although the wiring 39b can be arranged to pass through any arbitrary position, it is preferable to pass between the brackets 26 in order to protect the wiring 39b from impact during a collision.

In this embodiment, the first electronic device 56 is arranged adjacent to the motor 2, but the arrangement of the first electronic device 56 and the motor 2 can be arbitrary. Further, although the PCU 34 of the first electronic device 56 is located above the motor 2, the PCU 34 may be located at any position. In this case, it is desirable that the PCU 34 be located above the motor 2 in order to have a large extra length of the cable connecting the motor 2 and the PCU 34. Alternatively, the transaxle 32 may be arranged adjacent to the PCU 34, and the PCU 34 may be located above the transaxle 32.

In this embodiment, the cross member includes a first cross member 11a and a second cross member 11b that are spaced apart from each other in the longitudinal direction of the vehicle, but the cross member must include at least one cross member. It is sufficient that the cross member is provided with two or more cross members. In addition, in order to protect the first electronic device 56 from impact from the front and rear direction and the left and right direction when the vehicle 1 collides, the first electronic device 56 is connected to the pair of side members 10L and 10R and the first cross member 11a. It is preferable that the second cross member 11b be located in an area surrounded by the second cross member 11b and the second cross member 11b.

Further, in this embodiment, the first cross member 11a is located on the front side of the first electronic device 56, but the first cross member 11a can be placed in any position. In this case, in order to protect the first electronic device 56 from the impact from the front side when the vehicle 1 collides with the front side, the first cross member 11a is positioned at the front side of the first electronic device 56. It is desirable to do so.

In this embodiment, the first cross member 11a and the second cross member 11b are arranged so that their heights are relatively different when the first electronic device 56 is fixed. The height difference between the second cross member 11b and the second cross member 11b can be set arbitrarily. In this case, it is preferable that the first electronic device 56 be arranged at a low position between the first cross member 11a and the second cross member 11b. Further, the first cross member 11a and the second cross member 11b may have the same height, for example.

Further, in this embodiment, the battery 35 is arranged below the floor panel 13 on the rear side of the space 13a, but the battery 35 can be provided at any position. In this case, it is desirable that the battery 35 utilizes dead space.

Further, in this embodiment, the drive device 20 includes a motor 2 that outputs rotational power, and a transaxle 32 that transmits the rotational power output from the motor 2 to front wheels 31L and 31R that are drive wheels. However, as the motor 2, an appropriate motor can be used depending on the output. Furthermore, the transaxle 32 can be configured using various differential mechanisms such as differential gears, various transmissions, and the like. Further, in the present embodiment, the motor 2 is placed vertically (in the vehicle traveling direction), but the motor 2 may be placed horizontally.

Further, in this embodiment, the first electronic device 56 is arranged on the rear side of the vehicle with respect to the first cross member 11a, but various modes can be adopted for the arrangement. For example, the front side of the first electronic device 56 and the first cross member 11a may face each other, or the first electronic device 56 and the first cross member 11a may have a separate member such as a buffer member interposed between them. good. Further, in the present embodiment, the first electronic device 56 includes the PCU 34, the DC/DC converter 55, and the on-vehicle charger 36, but other electronic devices such as a control device are not provided. It's okay.

Further, in this embodiment, the first electronic device 56 is mounted on the support portion 12 formed between the first cross member 11a and the second cross member 11b, but the method for mounting the first electronic device 56 is , but is not limited to this. For example, various forms can be adopted, such as a plate-like structure in which the first electronic device 56 is supported on its entire surface, and a structure in which a plurality of plate-shaped, columnar, or cylindrical members are arranged. Furthermore, the direction in which the various members are arranged side by side can be arbitrary. In addition, in order to reinforce the first cross member 11a and the second cross member 11b against impact from the front side, various members are arranged in a direction crossing the first cross member 11a and the second cross member 11b. It is preferable to arrange. Moreover, when reinforcing against impact from the side, the members constituting the support portion 12 may be arranged in a direction intersecting the side members 10L and 10R.

Furthermore, in the present embodiment described above, in the vehicle 1, the floor panel 13 that forms the floor surface of the vehicle interior 14 is located at a portion other than the space 13a provided below the driver's seat and the front passenger seat. It extends flatly to the rear end of the chamber 14. Therefore, the vehicle 1 is designed to have excellent livability and convenience while making effective use of the space 13a.

In the above-described embodiment, an example is shown in which the floor panel 13 is simply made flat and low-profile, but the present invention is not limited to this, and can be provided with various types of vehicle structures.

It should be noted that the present invention is not limited to the embodiments and modifications described above, and those skilled in the art will recognize that other embodiments may be made based on the teaching and spirit of the invention without departing from the scope of the claims. It's easy to understand.

INDUSTRIAL APPLICABILITY The present invention can be suitably used in electric vehicles, hybrid vehicles, etc. that travel by transmitting rotational power generated by electric power to drive wheels.

1: Vehicle (electric vehicle)
2: Motor 3: Vehicle body 10L: Side member 10R: Side member 11a: First cross member 11b: Second cross member 12: Support part 13: Floor panel (floor part)
13a: Space 14: Vehicle interior 15: Front seat 16: Rear area 17: Intermediate area 18: Front area 20: Drive device 23: Output shaft 24: Motor body 25: Mount 26: Bracket 31L: Front wheel 31R: Front wheel 32: Transaxle 33: Electric air compressor 34: PCU
35: Battery 35a: Battery cell 36: On-vehicle charger 37L: Drive shaft 37R: Drive shaft 38: Bevel gear 39a: High voltage cable 39b: Wiring 39c: Wiring 51: Vacuum pump (second electronic device)
52: Support frame 55: DC/DC converter 56: First electronic device

Claims (3)

An electric vehicle equipped with multiple electronic devices,
The vehicle includes a floor portion forming a floor surface of a vehicle interior;
a pair of side members formed on both sides of the vehicle compartment;
and at least one cross member formed in a direction intersecting the side member below the floor part, and the electronic device is fixed to the cross member and arranged so as to be stacked vertically via a bracket. and located adjacent to the motor or transaxle,
An electric vehicle, wherein a power control unit of the electronic device is located above the motor or the transaxle . The electronic device includes a plurality of first electronic devices fixed to the cross member and arranged to be stacked vertically via the bracket,
a second electronic device disposed at a position different from the vertical stacking direction of the first electronic device;
The electric vehicle according to claim 1, wherein the wiring of the second electronic device is routed so as to pass through a gap formed in the bracket. The electric vehicle according to claim 2, wherein the wiring of the second electronic device is surrounded by the bracket.

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