vehicle

Abstract

To provide techniques that can reduce the mass of a cover protecting electrical components and firmly protect the electrical components.SOLUTION: A vehicle body disclosed herein includes: electrical components disposed at a rear portion of the vehicle body; a base bracket covering the lower side of the electrical components; and a cover attached to the base bracket and covering the upper side of the electrical components. The cover includes a cover upper wall located above the electrical components and a pair of cover side walls extending from the cover upper wall toward the base bracket on left and right sides of the electrical components, and the cover is formed in an opened shape at the rear side of the electrical components. The base bracket includes a protection wall extending upward at the rear side of the electrical components. The height of the protection wall based on the base bracket is smaller than the height of the cover upper wall based on the base bracket.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The technology disclosed in this specification relates to a vehicle including a vehicle body and an electrical component disposed at a rear portion of the vehicle body. [Background technology]

[0002] Patent Document 1 discloses a vehicle in which electronic components, such as a charge / discharge control device for controlling the charging and discharging of a battery, are arranged in the rear of the vehicle body. The vehicle is provided with a cover panel that covers the electronic components from the rear. The cover panel protects the rear surface of the electronic components when a load loaded in a luggage compartment in the rear of the vehicle body moves forward and applies a load to the electronic components from the rear. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2020-179693 A Summary of the Invention [Problem to be solved by the invention]

[0004] For example, when a rear-end collision occurs on a vehicle, a large load is applied to the vehicle from the rear. The load is transmitted to the electronic components through the vehicle body. The cover panel of Patent Document 1 covers the entire rear surface of the electronic components and each part of the upper surface and the lower surface. Therefore, when a large load is applied to the vehicle of Patent Document 1 from the rear, the load is applied to the electronic components through the cover panel, and the electronic components may be damaged. In order to protect the electronic components, a configuration in which the entire surface of the electronic components is covered by the cover panel is considered. However, in such a configuration, the mass of the cover panel increases. This specification provides a technology that can firmly protect the electronic components while suppressing an increase in the mass of the cover panel that protects the electronic components. [Means for solving the problem]

[0005] The vehicle body disclosed in this specification includes an electric component disposed at a rear portion of the vehicle body, a base bracket covering an underside of the electric component, and a cover attached to the base bracket and covering an upper side of the electric component. The cover has an upper cover wall located above the electric component and a pair of cover side walls extending from the upper cover wall to the base bracket on both left and right sides of the electric component, and has an open shape at the rear of the electric component. The base bracket has a protective wall extending upward behind the electric component. The height of the protective wall relative to the base bracket is smaller than the height of the upper cover wall relative to the base bracket.

[0006] According to the above-mentioned configuration, the cover and the base bracket cover the electric component from above, below, and both the left and right sides of the electric component. As a result, at least a part of the upper surface, lower surface, and both the left and right sides of the electric component are protected. Furthermore, the cover and the base bracket covering the upper, lower, and both the left and right sides of the electric component extend in the front-rear direction of the vehicle. Therefore, the cover and the base bracket are not easily deformed by a load from the rear. As a result, when a rear-end collision occurs on the vehicle, the electric component is protected by the cover and the base bracket. Furthermore, the cover has a shape that opens the rear of the electric component, and a protective wall extending upward from the base bracket behind the electric component where the cover is opened protects the electric component from the rear. Furthermore, the height of the protective wall based on the base bracket is smaller than the height of the upper wall of the cover. Therefore, the mass of the cover is reduced compared to a configuration in which the protective wall reaches the upper wall of the cover. In this way, the vehicle disclosed in this specification can firmly protect the electric component while reducing the mass of the cover that protects the electric component.

[0007] Also, for example, a cable may be connected to the electrical component from the rear. If a configuration in which the protective wall extends to the height of the upper cover wall is adopted, the protective wall blocks access to the cable even when the cover is removed, deteriorating workability. According to the above-mentioned configuration, the height of the protective wall based on the base bracket is smaller than the height of the upper cover wall, so that it is possible to suppress deterioration of workability behind the electrical component. In the above-mentioned vehicle, the height of the protective wall of the base bracket is less than the height of the upper cover wall, so there is a concern that the electrical components will not be protected near the upper cover wall. However, the electrical components are firmly protected near the upper cover wall by the upper cover wall and the pair of cover side walls.

[0008] Details and further improvements of the technology disclosed in this specification are described in the following "Forms for Carrying Out the Invention". [Brief description of the drawings]

[0009] [Figure 1] 1 shows a side view of the rear of a vehicle 100 according to an embodiment. [Diagram 2] 1 is a perspective view of a housing 20 provided in a vehicle 100 according to an embodiment of the present invention. [Diagram 3] 1 shows a perspective view of a converter module 10 provided in a vehicle 100 of an embodiment. [Figure 4] 4 shows a cross-sectional view taken along line IV-IV in FIG. 2. [Diagram 5] 3 shows a cross-sectional view taken along line VV in FIG. 2. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] In one embodiment of the present technology, the cover may have a shape in which a front portion of the electric component is open. With such a configuration, it is possible to reduce the mass of the cover more compared to a cover in which a front portion of the electric component is closed.

[0011] In one embodiment of the present technology, the cover upper wall of the cover may face a lower back of the vehicle body or a panel extending downward from the lower back in the height direction. According to this configuration, when a rear-end collision occurs on the vehicle and the lower back or the panel extending downward from the lower back moves forward, these structures come into contact with the cover upper wall from behind. As a result, the load applied to the cover upper wall is transmitted to the pair of cover side walls and further transmitted to the base bracket via the pair of cover side walls. As a result, the load applied to the electric components is reduced. This allows the cover upper wall to firmly protect the electric components.

[0012] In one embodiment of the present technology, a heat sink for dissipating heat from the electrical component may be provided on the upper surface of the electrical component. In this case, the height of the protective wall may be greater than the height of the upper surface of the electrical component and less than the height of the upper end of the heat sink. This allows the protective wall to cover the entire area of ​​the rear surface of the electrical component, and at least a portion of the rear surface of the heat sink is open. Compared to a configuration in which the protective wall is greater than the height of the upper end of the heat sink, the height of the protective wall is smaller. With this configuration, the height of the protective wall is appropriately set with respect to the electrical component to be protected, and the mass of the base bracket can be reduced.

[0013] In one embodiment of the present technology, the protective wall of the base bracket may extend in the left-right direction beyond the pair of cover side walls of the cover. With this configuration, when a rear-end collision of the vehicle occurs, a load applied to the protective wall from the rear is transmitted to the pair of cover side walls of the cover. This makes it possible to strongly protect the electric components.

[0014] In one embodiment of the present technology, the protective wall of the base bracket may have a first lower end extending in the left-right direction at a center portion of the protective wall in the left-right direction, a second lower end located outside the first lower end in the left-right direction and located above the first lower end, and a third lower end connecting the first lower end and the second lower end. In this case, the protective wall of the base bracket may extend in the left-right direction beyond the third lower end. According to this configuration, the lower end of the protective wall of the base bracket is supported not only by the first lower end extending in the left-right direction but also by the third lower end extending in a direction intersecting the left-right direction. As a result, the rigidity of the protective wall against a load from the rear is improved, and the electrical components are more firmly protected.

[0015] (Example) FIG. 1 shows a side view of the rear of a vehicle 100 according to an embodiment. FIG. 1 particularly shows a side view of the periphery of a luggage room 2 of the vehicle 100. The vehicle 100 is a plug-in hybrid electric vehicle (PHEV). In a modified example, the vehicle 100 may be an electric vehicle (BEV: Battery Electric Vehicle). In the following, the rear of the vehicle 100 (i.e., the direction of the arrow RR in the figure) is defined as "rear", and the opposite is defined as "front". In addition, the upper side of the vehicle 100 (i.e., the direction of the arrow UP in the figure) is defined as "upper", and the opposite is defined as "lower". Similarly, the right side of the vehicle 100 (i.e., the direction of the arrow RH in the figure) is defined as "right", and the opposite is defined as "left".

[0016] The vehicle 100 includes a vehicle body 4, a driving motor 3, a deck board 6, a tool box 8, and a converter module 10. The vehicle body 4 includes a lower back 4b, a lower back panel 4p, and a floor panel 4f. The lower back 4b is a framework component that extends in the left-right direction (i.e., the direction toward the rear of the paper in FIG. 1) along the lower edge of the rear opening of the vehicle 100. The lower back panel 4p is a panel that extends downward from the lower back 4b. The floor panel 4f is a panel that extends forward from the lower back panel 4p, and forms the floor of the vehicle 100.

[0017] The driving motor 3 is disposed below the floor panel 4f. The driving motor 3 drives the wheels 5 of the vehicle 100. The converter module 10 includes a plurality of electric components including a first converter 30 and a second converter 32. A detailed structure of the converter module 10 will be described later. A tool box 8 and a deck board 6 are disposed above the converter module 10. The deck board 6 is an interior component that constitutes the floor of the luggage room 2. By disposing the converter module 10 below the luggage room 2, the vehicle 100 can increase the space of the passenger compartment in which the passengers ride. Specifically, the position of the seat can be lowered compared to a configuration in which the converter module 10 is disposed below the seat on which the passengers sit, and therefore the space above the seat can be increased without increasing the external shape of the vehicle 100.

[0018] 2 and 3, a detailed structure of the converter module 10 will be described. The converter module 10 includes a housing 20, a first converter 30, a second converter 32, a duct 36, and a bracket 38. The housing 20 houses the first converter 30, the second converter 32, the duct 36, and the bracket 38, and protects these components.

[0019] FIG. 2 shows a perspective view of the housing 20. The housing 20 includes a cover 21 and a base bracket 11. The cover 21 has a gate-shaped cross section extending in the front-rear direction. That is, the front end and the rear end of the cover 21 are open. The cover 21 includes a cover upper wall 22, a right cover side wall 24R, a left cover side wall 24L, two right cover fixing parts 26R, and two left cover fixing parts 26L. The cover 21 is typically a sheet metal part formed by press molding. The cover upper wall 22 has a rectangular shape extending in the front-rear direction when viewed from above. The pair of cover side walls 24R, 24L are walls extending downward from both ends of the cover upper wall 22 in the left-right direction. Each cover fixing part 26R, 26L is located at the end of each side wall 24R, 24L in the front-rear direction and is a seat extending in the left-right direction from each side wall 24R, 24L.

[0020] The base bracket 11 is a tray-type sheet metal part. The base bracket 11 includes a protective wall 12, a bottom wall 18, two right base fixing parts 14R, two left base fixing parts 14L, a right rim 16R, and a left rim 16L. Like the cover 21, the base bracket 11 is also a sheet metal part formed by press molding. The bottom wall 18 is located in the center of the base bracket 11 in the left-right direction and has a planar shape facing the cover upper wall 22 of the cover 21. Each of the base fixing parts 14R, 14L is located at an end of the bottom wall 18 in the vehicle length direction. Each of the base fixing parts 14R, 14L is located above the bottom wall 18. Each of the base fixing parts 14R, 14L is fastened from above by a bolt 28 while being in contact with the corresponding cover fixing parts 26R, 26L of the cover 21. The right rim 16R is formed across the two right base fixing parts 14R, and the left rim 16L is formed across the two left base fixing parts 14L. Each rim 16R, 16L is a wall extending upward from each base fixing part 14R, 14L. Each rim 16R, 16L improves the rigidity of each base fixing part 14R, 14L. Each rim 16R, 16L improves the rigidity of each base fixing part 14R, 14L, particularly against loads from above.

[0021] As shown in FIG. 2, the lower end of the protective wall 12 of the base bracket 11 changes in the up-down direction. Specifically, the base bracket 11 has a first lower end E1 extending along the bottom wall 18 in the center in the left-right direction, a second lower end E2 extending along each of the base fixing parts 14R, 14L outside the first lower end E1, and a third lower end E3 connecting each of the lower ends E1, E2. As described above, each of the base fixing parts 14R, 14L of the base bracket 11 is located above the bottom wall 18. Therefore, the third lower end E3 bends in the up-down direction to connect each of the lower ends E1, E2. Both ends of the protective wall 12 in the left-right direction intersect with the second lower end E2. That is, the protective wall 12 extends in the left-right direction beyond the third lower end E3.

[0022] As described above, the base bracket 11 is formed by press molding. The protective wall 12 extending upward is formed by bending the bottom wall 18 extending in the front-rear direction upward. That is, the protective wall 12 is formed by a simple bending process on the bottom wall 18. However, the third lower end E3 changes in the up-down direction. Therefore, at the third lower end E3, the boundary between the protective wall 12 and the bottom wall 18 is formed by drawing. As a result, the protective wall 12 is supported not only by the bottom wall 18 extending in the left-right direction, but also by the wall changing in the up-down direction. As a result, the protective wall 12 is less likely to deform toward the front of the vehicle compared to a configuration formed only by a simple bending process on the bottom wall 18. In other words, such a configuration can improve the rigidity of the protective wall 12 against a load from the rear.

[0023] Moreover, the protective wall 12 of the base bracket 11 extends in the left-right direction beyond the pair of side walls 24R, 24L of the cover 21. Therefore, when a load is applied to the protective wall 12 from the rear, the load is transmitted to the pair of side walls 24R, 24L via the protective wall 12. Therefore, even if a large load is applied to the protective wall 12 from the rear, the protective wall 12 is unlikely to deform toward the front of the vehicle. In other words, the protective wall 12 extends in the left-right direction beyond the pair of side walls 24R, 24L, thereby improving the rigidity of the protective wall 12 against loads from the rear.

[0024] The internal structure of the converter module 10 will be described with reference to FIG. 3. In the housing 20 of the converter module 10, the first converter 30, the duct 36, and the second converter 32 are arranged in this order from the bottom. The first converter 30 is a so-called DC / DC converter, and is an electric component that steps down the DC power supplied from the power source of the vehicle 100 (e.g., a battery pack, not shown) and supplies the power to the auxiliary load and the auxiliary battery (both not shown) of the vehicle 100. The first converter 30 is an example of an "electrical component" in the technology disclosed in this specification. A heat sink 34 is provided on the upper surface of the first converter 30. The heat sink 34 is located in the duct 36 and dissipates heat from the first converter 30. A cooling air A1 is supplied from a blower fan (not shown) into the duct 36. The specific shape of the heat sink 34 is not particularly limited. As an example, the heat sink 34 in this embodiment has a plurality of fins extending upward.

[0025] The second converter 32 is fixed above the duct 36 by four brackets 38. The second converter 32 is a so-called DC / DC converter, which steps down DC power supplied from a power source (not shown) of the vehicle 100 and supplies the power to an auxiliary load and an auxiliary battery of the vehicle 100. The brackets 38 extend from the four corners of the bottom surface of the second converter 32 toward the bottom wall 18 of the base bracket 11. The lower end of each bracket 38 is fixed to the bottom wall 18 of the base bracket 11 by a bolt 39. This allows the second converter 32 to be held above the duct 36. In addition, a cable connector 33 is attached to the rear surface of the second converter 32. The cable connector 33 connects the second converter 32 to an auxiliary load (or an auxiliary battery) in the vehicle 100.

[0026] As described above, the vehicle 100 accommodates electrical components such as the first converter 30 and the second converter 32 in the space below the luggage compartment 2. For this reason, for example, when a rear-end collision occurs on the vehicle 100, each of the converters 30, 32 may be damaged. In particular, each of the converters 30, 32 is a high-voltage component that operates at a high voltage. The high voltage here means an operating voltage exceeding 60 volts DC or 30 volts AC (effective value). Hereinafter, with reference to Figs. 4 and 5, a configuration for protecting each of the converters 30, 32 in the vehicle 100 of this embodiment when a rear-end collision occurs will be described.

[0027] The positional relationship between the converter module 10 and the vehicle body 4 will be described with reference to FIG. 4. FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 2, and is a cross-sectional view at the center of the converter module 10 in the left-right direction. The manufacturer of the vehicle 100 first arranges the first converter 30 and the base bracket 11 to which the duct 36 is fixed, from above, on the body bracket 40 fixed to the floor panel 4f of the vehicle body 4. Next, the manufacturer arranges the second converter 32 above the duct 36, and fixes the second converter 32 to the bottom wall 18 of the base bracket 11 via the four brackets 38. Thereafter, the manufacturer arranges the cover 21 from above the second converter 32, and fastens the cover 21 and the base bracket 11 to the body bracket 40 by the bolts 28, as shown in FIG. 5. This fixes the converter module 10 to the vehicle body 4. As described above, the cover 21 has a shape that opens the converters 30 and 32 in the front-rear direction. Therefore, the mass of the cover 21 is reduced compared to a configuration in which the cover 21 covers the front and rear of each of the converters 30, 32. As a result, the workability of the manufacturer in arranging the cover 21 can be improved.

[0028] The lower back 4b of the vehicle body 4 has a closed cross section and is highly rigid. Furthermore, the lower back 4b extends in the left-right direction. For this reason, for example, when another vehicle collides from behind the vehicle 100, the other vehicle applies a large load F1 to the front of the vehicle (i.e., to the left of the paper surface in FIG. 4) to the lower back 4b. As a result, the lower back 4b moves forward of the vehicle. As shown in FIG. 4, the cover upper wall 22 of the cover 21 of the housing 20 faces the lower back 4b in the height direction. For this reason, the lower back 4b that moves forward of the vehicle transmits the load F1 to the cover upper wall 22 of the cover 21.

[0029] 5, both left and right ends of the cover upper wall 22 are supported by a pair of cover side walls 24R, 24L. Furthermore, the pair of cover side walls 24R, 24L are fastened to the body bracket 40 together with the base bracket 11 via cover fixing portions 26R, 26L.

[0030] Therefore, the load F1 transmitted to the cover upper wall 22 of the cover 21 is distributed and transmitted to the pair of cover side walls 24R, 24L extending in the front-rear direction and the bottom wall 18 of the base bracket 11. Each of the walls 22, 24R, 24L, 18 extending in the front-rear direction is unlikely to deform in the front-rear direction. Therefore, the converter module 10 accommodated in the housing 20 is protected from the load F1.

[0031] In addition, when an object colliding with the vehicle 100 from behind is low, a large load F2 may be applied to the lower back panel 4p located below the lower back 4b toward the front of the vehicle. In this case, the lower back panel 4p moves toward the front of the vehicle. As a result, the lower back panel 4p transmits the load F2 to the protective wall 12 of the base bracket 11.

[0032] 5, the protective wall 12 extends in the left-right direction beyond the pair of cover side walls 24R, 24L. Therefore, as described above, the load F2 applied to the protective wall 12 of the base bracket 11 is transmitted to the pair of cover side walls 24R, 24L in addition to the bottom wall 18 of the base bracket 11. In this way, the protective wall 12 protects the first converter 30 from the loads F1 and F2.

[0033] 2, the boundary between the protective wall 12 and the bottom wall 18 at the third lower end E3 of the base bracket 11 is formed by drawing. Therefore, the protective wall 12 has high rigidity against the load F2. Therefore, the protective wall 12 firmly protects the first converter 30 from the loads F1 and F2.

[0034] Here, when the upper surface of the bottom wall 18 of the base bracket 11 is used as a reference, the height H4 of the protective wall 12 is greater than the height H3 of the upper surface of the first converter 30 and is smaller than the height H2 of the upper end of the heat sink 34. In other words, the protective wall 12 covers the entire rear surface of the first converter 30, but does not cover the rear surface of the heat sink 34. Therefore, the protective wall 12 can protect the first converter 30, which is an electric component, from the loads F1 and F2 more firmly than the heat sink 34. As a result, the height of the protective wall 12 can be appropriately set, and the mass of the base bracket 11 can be reduced.

[0035] Furthermore, when the upper surface of the bottom wall 18 of the base bracket 11 is used as a reference, the height H4 of the protective wall 12 is smaller than the height H1 of the cover upper wall 22 of the cover 21. As a result, a gap is provided between the upper end of the protective wall 12 and the lower end of the cover upper wall 22. This allows the mass of the base bracket 11 to be reduced compared to a configuration in which the protective wall 12 extends to the lower end of the cover upper wall 22. Furthermore, this allows easier access to the cable connector 33 when the cover 21 is removed compared to a configuration in which the protective wall 12 extends to the lower end of the cover upper wall 22, thereby improving workability.

[0036] Although specific examples of the technology disclosed in this specification have been described in detail above, these are merely examples and do not limit the scope of the claims. The technology described in the claims includes various modifications and variations of the specific examples exemplified above. Modifications of the above embodiments are listed below.

[0037] (Modification 1) The converter module 10 does not have to include the second converter 32.

[0038] (Modification 2) The cover 21 does not have to have a shape that opens the front of each of the converters 30, 32.

[0039] (Variation 3) The cover upper wall 22 of the cover 21 may be located lower than the lower back panel 4b of the vehicle body 4. In that case, the cover upper wall 22 may face the lower back panel 4p in the front-rear direction.

[0040] (Variation 4) The height H4 of the protective wall 12 may be greater than the height H2 of the upper end of the heat sink .

[0041] (Variation 5) The vehicle 100 may be equipped with a battery disposed at the rear of the vehicle body 4, instead of the converter module 10. In this case, the battery may be accommodated in the housing 20 having the above-mentioned base bracket 11 and cover 21. In this variation, the battery is an example of an "electrical component."

[0042] (Variation 6) Both left and right ends of the protective wall 12 of the base bracket 11 may be located inside the pair of cover side walls 24R, 24L of the cover 21.

[0043] (Variation 7) The lower end of the base bracket 11 may extend linearly in the left-right direction.

[0044] The technical elements described in this specification or drawings have technical utility either alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. In addition, the technologies illustrated in this specification or drawings can achieve multiple objectives simultaneously, and achieving one of these objectives is itself technically useful. [Explanation of symbols]

[0045] 2: Luggage room 3: Driving motor 4: Body 4b: Lower back 4f: Floor panel 4p: Lower back panel 5: Wheels 6: Deck board 8: Toolbox 10: Converter module 11: Base bracket 12 :Protective wall 14L: Left side base fixing part 14R: Right side base fixing part 16L: Left rim 16R: Right rim 18: Bottom wall 20: Housing 21: Cover 22: Cover top wall 24L: Left cover side wall 24R: Right side cover wall 26L: Left cover fixing part 26R: Right side cover fixing part 28, 39: Bolt 30: First converter 32: Second converter 33: Cable connector 34: Heat sink 36: Duct 38: Bracket 40: Body bracket 100: Vehicle E1: First bottom edge E2: Second bottom edge E3: The third bottom edge

Claims

1. The car body and an electrical component disposed at a rear portion of the vehicle body; a base bracket for covering a lower portion of the electrical component; a cover attached to the base bracket and covering an upper portion of the electrical component; Equipped with the cover has an upper cover wall located above the electric component, and a pair of side cover walls extending from the upper cover wall to the base bracket on both left and right sides of the electric component, and the rear of the electric component is open, the base bracket has a protective wall extending upwardly behind the electrical component, a height of the protection wall relative to the base bracket is smaller than a height of the cover upper wall relative to the base bracket; a heat sink for dissipating heat from the electrical component is provided on an upper surface of the electrical component; The height of the protective wall is greater than the height of the top surface of the electrical component and less than the height of the top end of the heat sink. vehicle.

2. A vehicle body, an electrical component disposed at a rear portion of the vehicle body; a base bracket for covering a lower portion of the electrical component; a cover attached to the base bracket and covering an upper portion of the electrical component; Equipped with the cover has an upper cover wall located above the electric component, and a pair of side cover walls extending from the upper cover wall to the base bracket on both left and right sides of the electric component, and the rear of the electric component is open, the base bracket has a protective wall extending upwardly behind the electrical component, a height of the protection wall relative to the base bracket is smaller than a height of the cover upper wall relative to the base bracket; The protective wall of the base bracket extends in the left-right direction beyond the pair of cover side walls. vehicle.

3. A vehicle body, an electrical component disposed at a rear portion of the vehicle body; a base bracket for covering a lower portion of the electrical component; a cover attached to the base bracket and covering an upper portion of the electrical component; Equipped with the cover has an upper cover wall located above the electric component, and a pair of side cover walls extending from the upper cover wall to the base bracket on both left and right sides of the electric component, and the rear of the electric component is open, the base bracket has a protective wall extending upwardly behind the electrical component, a height of the protection wall relative to the base bracket is smaller than a height of the cover upper wall relative to the base bracket; The base bracket is a first lower end extending in the left-right direction at a central portion of the protective wall in the left-right direction; a second lower end located outside the first lower end in the left-right direction and extending in the left-right direction above the first lower end; a third lower end connecting the first lower end and the second lower end; The protective wall of the base bracket extends in the left-right direction beyond the third lower end. vehicle.

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