CN210235100U - Vehicle body lower part structure of electric vehicle - Google Patents
Vehicle body lower part structure of electric vehicle Download PDFInfo
- Publication number
- CN210235100U CN210235100U CN201920877703.0U CN201920877703U CN210235100U CN 210235100 U CN210235100 U CN 210235100U CN 201920877703 U CN201920877703 U CN 201920877703U CN 210235100 U CN210235100 U CN 210235100U
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- vehicle body
- protection cover
- lower frame
- battery protection
- fastening
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- 239000000725 suspension Substances 0.000 claims abstract description 32
- 238000013459 approach Methods 0.000 claims 1
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 230000005540 biological transmission Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000004575 stone Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 1
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- Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
Abstract
The utility model provides a car body substructure of electric motor car. The lower structure of the body of the electric vehicle includes a suspension member, a battery, a lower frame, a wire harness, and a battery protection cover. The 2 nd fastening portion fixedly coupling the rear end portion of the battery protection cover to the lower frame includes a fastening member mounted on the lower frame, and a fastening hole formed in the battery protection cover, the fastening hole having a fixing hole and a releasing hole. With the above configuration, the rear end portion of the battery protection cover can be detached from the lower frame in the event of a frontal collision of the electric vehicle, so that it is possible to avoid deformation of the lower frame due to a collision load applied to the lower frame, and thus it is possible to prevent the battery and the wire harness from moving downward in the vehicle body and causing the wire harness to collide with the suspension member.
Description
Technical Field
The utility model relates to an automobile body substructure of electric motor car.
Background
Electric Vehicles (EV) using a motor as a driving source are well known. In general, a power transmission device such as a motor, a transmission, and an inverter in an electric vehicle is disposed in a vehicle front cabin, and a battery is disposed in a lower portion of the electric vehicle. Fig. 6 is a sectional view showing a vehicle body lower portion structure 300 of an electric vehicle in the related art.
As shown in fig. 6, a suspension member 340 and a lower frame 350 that constitute a lower structure of the vehicle body are disposed in front of and below the battery 450. The suspension member 340 supports the motor and transaxle. A harness 451 is connected to the front of the battery 450 via a connector 452. The wire harness 451 is connected to the PCU in the vehicle front cabin through the rear from above the suspension member 340.
A battery protection cover 351 is provided between the suspension member 340 and the lower frame 350. The battery protection cover 351 is provided such that its front end portion is fixedly connected to the suspension member 340 by a front fastening portion 361 and its rear end portion is fixedly connected to the lower frame 350 by a rear fastening portion 362. The battery protection cover 351 protects the battery 450 and the wire harness 451 from an impact of an obstacle such as a stone bouncing from a road surface.
Fig. 7 is a sectional view showing a state in which the battery protection cover 351 of the related art described above receives a load from the front of the vehicle body. In general, in the event of a frontal collision of an electric vehicle, the transaxle and the suspension member 340 move rearward of the vehicle body. When the suspension member 340 moves rearward of the vehicle body, a load is applied to the lower frame 350 via the battery protection cover 351, causing the lower frame 350 to deform downward of the vehicle body. When the lower frame 350 is deformed and moves downward in the vehicle body, the battery 450 and the wire harness 451 move downward in the vehicle body, and the wire harness 451 may collide with the suspension member 340 and be damaged.
SUMMERY OF THE UTILITY MODEL
In order to solve the above technical problem, an object of the present invention is to provide an electric vehicle body substructure capable of preventing a battery and a wire harness from moving to a vehicle body lower part when an electric vehicle collides, and preventing the wire harness from colliding with a suspension member.
As a technical solution to solve the above technical problem, the present invention provides a vehicle body lower structure of an electric vehicle, including a suspension member provided at a front portion of a vehicle body; a battery disposed rearward of the suspension member in a vehicle longitudinal direction and located at a lower portion of a vehicle body; a lower frame disposed below the battery; a wire harness connected to the battery and extending toward a front portion of the vehicle body; and a battery protection cover disposed between the suspension member and the lower frame and under the wire harness, characterized in that: the front end of the battery protection cover is fixedly connected to the suspension member by a 1 st fastening portion, the rear end of the battery protection cover is fixedly connected to the lower frame by a 2 nd fastening portion, the 2 nd fastening portion includes a fastening member mounted on the lower frame, and a fastening hole formed in the battery protection cover, the fastening hole has a fixing hole into which the fastening member is inserted and fastened, and a release hole communicating with the fixing hole, the release hole is located closer to the front of the vehicle body than the fixing hole, and has a hole diameter larger than the maximum outer diameter of the fastening member.
The utility model discloses an advantage of the automobile body substructure of above-mentioned electric motor car lies in, under the electric motor car emergence frontal collision's the condition, if the battery protection lid removes to the automobile body rear, then the hole for breaking away from that forms on the battery protection lid can remove the position of the fastening member of installation on the underframe, and makes fastening member deviate from with the hole from breaking away from to, be connected between battery protection lid and the underframe is relieved. Therefore, when the electric vehicle has a frontal collision, the battery protection cover can be separated from the lower frame, so that the situation that the collision load is applied to the lower frame to deform the lower frame can be avoided. As a result, the battery and the wire harness are less likely to move downward of the vehicle body, and the wire harness can be prevented from colliding with the suspension member.
In the vehicle body lower structure of the electric vehicle according to the present invention, the release hole is preferably formed in a circular or square shape. With this configuration, when the release hole is circular, the area occupied by the release hole in the battery protection cover is small, and this structure is suitable for a structure in which the area of the end portion of the battery protection cover is small. In the case where the detachment hole has a square shape, the opening area of the detachment hole is larger than that of a circle, and the fastening member is more easily detached from the detachment hole, so that the connection between the battery protection cover and the lower frame is more easily released.
In the vehicle body lower portion structure of the electric vehicle according to the present invention, it is preferable that the fastening hole has a communicating portion formed between the fixing hole and the releasing hole and communicating the fixing hole and the releasing hole, and a width of the communicating portion in the vehicle width direction is set to be wider as being closer to the vehicle body front. With this configuration, even when the battery protection cover moves obliquely rearward in the event of a frontal collision of the electric vehicle, the release hole moves to the position of the fastening member, and the fastening member is released from the release hole, thereby releasing the connection between the battery protection cover and the lower frame.
In addition, in the vehicle body lower portion structure of the electric vehicle of the present invention, it is preferable that a guide portion is further provided, and when the battery protection cover moves to the vehicle body rear side with respect to the lower frame, the guide portion guides the battery protection cover to move to the vehicle body lower side with respect to the lower frame. With this structure, when the release hole is moved to the position of the fastening member, the fastening member is easily released from the release hole, and thus the connection between the battery protection cover and the lower frame is easily released.
In the vehicle body lower structure of the electric vehicle according to the present invention, it is preferable that the guide portion includes an inclined portion formed on one of the lower frame and the battery protection cover, and an abutting portion formed on the other of the lower frame and the battery protection cover, the inclined portion is configured such that an end portion thereof closer to a rear side of the vehicle body is inclined lower than an end portion thereof closer to a front side of the vehicle body, and the abutting portion is configured such that it is inclined substantially parallel to the inclined portion and is in contact with the inclined portion. With this configuration, since the surface of the inclined portion that contacts the abutting portion is inclined downward toward the rear of the vehicle body (the end portion of the inclined portion that is closer to the rear of the vehicle body is lower than the end portion that is closer to the front of the vehicle body), the battery protection cover can be guided to move downward toward the vehicle body with respect to the lower frame when the inclined portion and the abutting portion move relative to each other. Thus, when the release hole is moved to the position of the fastening member, the fastening member is easily released from the release hole, and thus the connection between the battery protection cover and the lower frame is more easily released.
Drawings
Fig. 1 is a bottom view showing a vehicle body lower part structure of an electric vehicle according to an embodiment of the present invention.
Fig. 2 is a sectional view taken along line a-a in fig. 1.
Fig. 3A is a bottom view showing a state of the 2 nd fastening portion in the vehicle body lower portion structure.
Fig. 3B is a bottom view showing a state of the 2 nd fastening portion in the vehicle body lower portion structure.
Fig. 4 is a sectional view showing a state in which the battery protection cover receives a load from the front of the vehicle body at the time of a frontal collision of the electric vehicle.
Fig. 5A is a bottom view showing a modification of the fastening hole of the 2 nd fastening part.
Fig. 5B is a bottom view showing another modification of the fastening hole of the 2 nd fastening part.
Fig. 6 is a sectional view showing a structure of a lower portion of a vehicle body of a conventional electric vehicle.
Fig. 7 is a sectional view showing a state in which a battery protection cover according to the related art is subjected to a load from the front of a vehicle body.
Detailed Description
Hereinafter, a vehicle body lower structure 100 of an electric vehicle 200 according to an embodiment of the present invention will be described with reference to the drawings. The electric vehicle 200 is a vehicle having an electric motor as a drive source.
Fig. 1 is a bottom view showing a vehicle body lower portion structure 100 of an electric vehicle 200 according to the present embodiment. In each of the drawings described below, an arrow F indicates the front of the electric vehicle 200; arrow B indicates the rear of the electric vehicle 200; arrow U indicates above the electric vehicle 200; arrow D indicates the lower side of the electric vehicle 200; the arrow L indicates the left of the electric vehicle 200; the arrow R indicates the right of the electric vehicle 200.
As shown in fig. 1, the vehicle body 110 of the electric vehicle 200 is provided with a front floor 10, side members 21 and 22, lower members 31 and 32, a front suspension member 40, a suspension cross member 45, a lower frame 50, and a battery protection cover 51, which constitute a vehicle body lower structure 100.
A power transmission device (not shown) such as a motor, a transaxle, and a PCU (power control unit) is disposed in front cabin 120 located at the front portion of vehicle body 110.
The lower beam 31 and the lower beam 32 are disposed at the bottom of the vehicle body 110 and extend in the vehicle length direction.
The front suspension member 40 is disposed below the lower beam 31 and the lower beam 32. The front suspension member 40 includes side rails 41 and 42, a front cross member 43, a rear cross member 44, and a suspension cross member 45.
The suspension cross member 45 is disposed below the rear cross member 44 and extends in the vehicle width direction.
Further, a battery 150 is disposed between the lower beam 31 and the lower beam 32. The battery 150 is disposed further to the vehicle body rear (B side) than the front suspension member 40 in the vehicle length direction, and is located at a lower portion of the vehicle body 110.
Fig. 2 is a sectional view taken along line a-a in fig. 1. As shown in fig. 2, a harness 151 is connected to the battery 150. The wiring harness 151 extends from the battery 150 into the vehicle front compartment 120. This harness 151 is used to electrically connect the PCU disposed in the vehicle front compartment 120 and the battery 150.
The lower frame 50 is disposed below the battery 150. The battery protection cover 51 is disposed between the suspension cross member 45 and the lower frame 50. In addition, the battery protection cover 51 is located below the wire harness 151. The battery 150 and the wire harness 151 can be protected by the battery protection cover 51 against a load from below (e.g., a collision load of an obstacle such as a stone bouncing from the road surface).
The front end of the battery protection cover 51 is fixedly connected to the suspension cross member 45 by the 1 st fastening portion 61. The rear end portion of the battery protection cover 51 is fixedly coupled to the lower frame 50 by the 2 nd fastening portion 62. Here, the 1 st and 2 nd fastening portions 61 and 62 include bolts.
The harness 151 is connected to the front of the battery 150 through a connector 152. Harness 151 passes from above battery protection cover 51 and is connected to the PCU in front compartment 120.
As shown in fig. 2, the rear end of the battery protection cover 51 and the lower frame 50 are provided with guide portions 80. The guide portion 80 has an inclined portion 81 and an abutting portion 83.
The inclined portion 81 is formed on the lower frame 50. The inclined portion 81 is configured such that an end portion thereof closer to the vehicle body rear side (B side) is inclined lower than an end portion thereof closer to the vehicle body front side (F side). That is, the inclined portion 81 is configured to extend from the vehicle front toward the vehicle rear lower side. The contact portion 83 is formed in the battery protection cover 51 and is inclined substantially parallel to the inclined portion 81, that is, extends from the front of the vehicle body toward the rear-lower direction of the vehicle body. When the battery protection cover 51 moves rearward (B-side) of the vehicle body relative to the lower frame 50, the guide portion 80 is configured such that the abutting portion 83 abuts against the inclined portion 81 and the surface of contact therebetween is inclined downward from the front of the vehicle body toward the rear of the vehicle body, so that the battery protection cover 51 is guided to move downward (U-side) of the vehicle body relative to the lower frame 50.
In addition, as another embodiment, the inclined portion 81 may be formed on the battery protection cover 51; the abutment portion 83 is formed on the lower frame 50.
Fig. 3A is a bottom view showing the 2 nd fastening portion 62, and shows a state where the rear end portion of the battery protection cover 51 and the lower frame 50 are fixedly connected by the 2 nd fastening portion 62. Fig. 3B is a bottom view of the 2 nd fastening portion 62, and shows a state in which the battery protection cover 51 is moved rearward (B side) of the vehicle body with respect to the lower frame 50.
As shown in fig. 3A, the 2 nd fastening part 62 has a fastening member 71 and a fastening hole 73. The fastening member 71 is mounted on the lower frame 50. Here, the fastening member 71 is a bolt, and has a shaft portion 711 and a head portion 712.
The fastening hole 73 is an opening portion formed on the rear end portion of the battery protection cover 51. The fastening hole 73 has a fixing hole 74 and a release hole 75.
The fixing hole 74 is a hole into which the fastening member 71 is inserted and fastened. The diameter of the fixing hole 74 is set such that the shaft 711 of the fastening member 71 can be inserted into the fixing hole 74, but the head 712 of the fastening member 71 cannot pass through the fixing hole 74.
The release hole 75 communicates with the fixing hole 74 and is located in the vehicle body front (F side) of the fixing hole 74. The diameter of the release hole 75 is set so that the head 712 of the fastening member 71 can pass through it. That is, the diameter of the release hole 75 is larger than the maximum outer diameter of the fastening member 71 (the outer diameter of the head 712 of the fastening member 71).
As shown in fig. 3A, the rear end portion of the battery protection cover 51 and the lower frame 50 are fixedly coupled by the 2 nd fastening portion 62 in a state where the fastening members 71 are inserted in the fixing holes 74 of the fastening holes 73.
Fig. 3B shows a state in which the battery protection cover 51 is moved to the vehicle body rear (B side) with respect to the lower frame 50, and the release holes 75 of the fastening holes 73 are moved to the positions of the fastening members 71. In this state, the head portion 712 of the fastening member 71 can pass through the release hole 75, and thus the fastening member 71 can be released from the release hole 75, so that the rear end portion of the battery protection cover 51 is released from the lower frame 50.
In addition, in the present embodiment, since the guide portion 80 is provided, when the battery protection cover 51 moves rearward (B side) of the vehicle body with respect to the lower frame 50, the abutting portion 83 abuts against the inclined portion 81 to move the battery protection cover 51 downward (U side) of the vehicle body with respect to the lower frame 50, and the fastening member 71 can easily come out of the detachment hole 75 to detach the rear end portion of the battery protection cover 51 from the lower frame 50.
Fig. 4 is a sectional view showing a state in which the battery protection cover 51 receives a load from the front (F side) of the vehicle body at the time of a frontal collision of the electric vehicle 200. As shown in fig. 4, when the electric vehicle 200 undergoes a frontal collision, the transaxle and the suspension member 40 move rearward of the vehicle body. As the suspension member 40 moves rearward of the vehicle body, the battery protection cover 51 also moves rearward of the vehicle body, and the release hole 75 formed in the battery protection cover 51 moves to the position of the fastening member 71 attached to the lower frame 50 (see fig. 3B), so that the fastening member 71 is released from the release hole 75, and the connection between the battery protection cover 51 and the lower frame 50 is released. Therefore, when the electric vehicle 200 undergoes a frontal collision, since the battery protection cover 51 is detached from the lower frame 50, it is possible to avoid a collision load being applied to the lower frame 50 to deform it. As a result, it is possible to prevent the battery 150 and the wire harness 151 from moving downward (U side) of the vehicle body and the wire harness 150 from colliding with the suspension member 40.
The present invention is not limited to the above embodiment, and can be modified as appropriate. For example, fig. 5A and 5B show different modifications of the fastening hole, respectively.
In the above embodiment, the release hole 75 of the fastening hole 73 is circular, and the release hole 175 of the fastening hole 173 shown in fig. 5A is formed in a square shape. Since the opening area of the release hole 175 is larger than that of the circular shape, the fastening member 71 is more easily released from the release hole 175, and the connection between the battery protection cover 51 and the lower frame 50 is more easily released.
The fastening hole 273 shown in fig. 5B has a communication portion 276. The communicating portion 276 is formed between the fixing hole 274 and the release hole 275, and communicates the fixing hole 274 and the release hole 275. The width of the communication portion 276 in the vehicle width direction is set to be wider toward the front (F side) of the vehicle body. Therefore, even when the battery protection cover 51 moves diagonally rearward in the event of a frontal collision of the electric vehicle 200, the release hole 275 moves to the position of the fastening member 71, and the fastening member 71 is released from the release hole 275, so that the connection between the battery protection cover 51 and the lower frame 50 can be easily released.
Claims (5)
1. A vehicle body lower structure of an electric vehicle includes a suspension member provided at a front portion of a vehicle body; a battery disposed rearward of the suspension member in a vehicle longitudinal direction and located at a lower portion of a vehicle body; a lower frame disposed below the battery; a wire harness connected to the battery and extending toward a front portion of the vehicle body; and a battery protection cover disposed between the suspension member and the lower frame and under the wire harness, characterized in that:
the front end portion of the battery protection cover is fixedly connected to the suspension member by a 1 st fastening portion,
the rear end portion of the battery protection cover is fixedly coupled to the lower frame by a 2 nd fastening portion,
the 2 nd fastening part includes a fastening member mounted on the lower frame and a fastening hole formed in the battery protection cover,
the fastening hole has a fixing hole into which the fastening member is inserted and fastened, and a release hole communicating with the fixing hole, the release hole being located at the vehicle body front side of the fixing hole and having a hole diameter larger than the maximum outer diameter of the fastening member.
2. The vehicle body lower structure of the electric vehicle according to claim 1, wherein:
the release hole is formed in a circular or square shape.
3. The vehicle body lower structure of the electric vehicle according to claim 1 or 2, wherein:
the fastening hole has a communicating portion formed between the fixing hole and the releasing hole and communicating the fixing hole and the releasing hole,
the width of the communication portion in the vehicle width direction is set to be wider as it approaches the front of the vehicle body.
4. The vehicle body lower structure of the electric vehicle according to claim 1 or 2, wherein:
the battery protection cover is provided with a guide portion that guides the battery protection cover to move downward in the vehicle body with respect to the lower frame when the battery protection cover moves rearward in the vehicle body with respect to the lower frame.
5. The vehicle body lower structure of the electric vehicle according to claim 4, wherein:
the guide portion includes an inclined portion formed on one of the lower frame and the battery protection cover, and an abutting portion formed on the other of the lower frame and the battery protection cover,
the inclined portion is configured such that an end portion thereof closer to the rear of the vehicle body is inclined lower than an end portion thereof closer to the front of the vehicle body,
the contact portion is configured to be inclined substantially parallel to the inclined portion and to be in contact with the inclined portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920877703.0U CN210235100U (en) | 2019-06-12 | 2019-06-12 | Vehicle body lower part structure of electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920877703.0U CN210235100U (en) | 2019-06-12 | 2019-06-12 | Vehicle body lower part structure of electric vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210235100U true CN210235100U (en) | 2020-04-03 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920877703.0U Active CN210235100U (en) | 2019-06-12 | 2019-06-12 | Vehicle body lower part structure of electric vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210235100U (en) |
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2019
- 2019-06-12 CN CN201920877703.0U patent/CN210235100U/en active Active
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