Vehicle-mounted equipment installation device

Abstract

The vehicle-mounted equipment mounting device (1) of the present invention uses a connecting bracket (10) to mount a vehicle-mounted equipment (N) onto a vehicle frame (F) extending in the longitudinal direction of the vehicle. The connecting bracket (10) has: a first side wall portion (10s) fixed to a side wall portion (Fsa) of the frame; a second side wall portion (10t) disposed opposite to the first side wall portion (10s) and fixed to the vehicle-mounted equipment (N); and a third side wall portion (10t) connecting the first side wall portion (10s) and the second side wall portion (10t). The three side wall portions (10u) and the connecting bracket (10) are in the shape of a generally U-shaped or H-shaped section extending in the vertical direction and open at the rear of the vehicle. The connecting bracket (10) also has a generally horizontally arranged first reinforcing rib (11a) between the first side wall portion (10s) and the second side wall portion (10t). The rear end (11aa) of the first reinforcing rib (11a) protrudes further rearward than the rear end (10ta) of the second side wall portion (10t).

Description

Technical Field

[0001] This invention relates to a vehicle-mounted equipment installation device. Background Technology

[0002] In trucks and other vehicles, various onboard equipment such as fuel tanks, batteries, and exhaust purification devices are mounted on the vehicle frame (see Patent Document 1).

[0003] As a device for mounting such vehicle-mounted equipment (hereinafter referred to as "vehicle-mounted equipment mounting device"), a device with the following structure is known, in which a connecting bracket is arranged between the vehicle-mounted equipment and the longitudinal beam in the vehicle width direction, and supports the vehicle-mounted equipment at a position outside the longitudinal beam in the vehicle width direction, and connects the vehicle-mounted equipment to the vehicle frame (for example, see the description below). Figure 1 ).

[0004] Existing technical documents

[0005] Patent documents

[0006] Patent Document 1: Japanese Patent Application Publication No. 2020-001527 Summary of the Invention

[0007] The problem the invention aims to solve

[0008] However, when designing the mounting method for onboard equipment in such vehicles, the protection of the onboard equipment during a vehicle collision must also be considered. This is because a vehicle collision may result in fires due to damage to onboard equipment (e.g., fuel tanks). It should be noted that during a vehicle collision (specifically, a collision at the front surface of the vehicle), the onboard equipment mounted on the vehicle frame moves forward relative to the frame due to inertial forces. Therefore, it is particularly necessary to consider scenarios such as collisions between adjacent onboard equipment.

[0009] Regarding this, as a connecting bracket for mounting equipment in a vehicle, there are examples of connecting brackets having a structure that extends vertically and has a cross-sectional shape that is generally U-shaped or H-shaped (for example, see below). Figure 2 In this type of connecting bracket, the rear end of the vehicle is an edge. Therefore, in the event of a vehicle collision, this edge may impact the vehicle-mounted equipment located on the rear side of the vehicle, thereby causing damage to the vehicle-mounted equipment.

[0010] The simplest solution to this problem is to increase the thickness of the connecting bracket to make it edgeless; however, this would increase the weight of the connecting bracket itself.

[0011] The present invention was made in view of the above-mentioned problems, and its object is to provide an on-board equipment mounting device that can suppress damage to on-board equipment mounted on the rear side of the vehicle caused by the connecting bracket during a vehicle collision.

[0012] Solution to the problem

[0013] As a key aspect of the present invention addressing the aforementioned problems, one method of vehicle-mounted equipment mounting device utilizes a connecting bracket to mount vehicle-mounted equipment onto a vehicle frame extending in the longitudinal direction of the vehicle. In this vehicle-mounted equipment mounting device...

[0014] The connecting bracket has a first sidewall portion that abuts against and is fixed to the sidewall portion of the vehicle frame; a second sidewall portion that is positioned opposite to and fixed to the on-board equipment at a location further outward in the vehicle width direction than the first sidewall portion; and a third sidewall portion that connects the first sidewall portion and the second sidewall portion. Furthermore, the first sidewall portion, the second sidewall portion, and the third sidewall portion cause the connecting bracket to have a generally U-shaped or H-shaped cross-section, extending vertically and having an open section at the rear of the vehicle.

[0015] The connecting bracket also has a first reinforcing rib that is generally horizontally arranged between the first sidewall portion and the second sidewall portion.

[0016] The rear end of the first reinforcing rib protrudes further into the rear of the vehicle than the rear end of the second sidewall portion.

[0017] Invention Effects

[0018] According to the vehicle-mounted equipment mounting device of the present invention, damage to vehicle-mounted equipment located on the rear side of the vehicle caused by the connecting bracket during a vehicle collision can be suppressed. Attached Figure Description

[0019] Figure 1 It is a top view showing the appearance of the vehicle frame.

[0020] Figure 2 This is a diagram showing the detailed structure of the vehicle-mounted equipment installation device.

[0021] Figure 3 This is a diagram showing the detailed structure of the vehicle-mounted equipment installation device.

[0022] Figure 4 This is a diagram showing the detailed structure of the connecting bracket for the vehicle-mounted equipment mounting device (only the rear connecting bracket is shown here).

[0023] Figure 5 This is an enlarged view showing the detailed structure of the reinforcing ribs installed on the connecting bracket.

[0024] Figure 6 This is an enlarged view showing the detailed structure of the reinforcing ribs installed on the connecting bracket.

[0025] Figure 7 This is an enlarged view showing the detailed structure of the reinforcing ribs installed on the connecting bracket. Detailed Implementation

[0026] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that in this specification and the accompanying drawings, constituent elements having substantially the same function are labeled with the same reference numerals, and repeated descriptions are omitted.

[0027] It should be noted that, to clarify the positional relationships of the various structures, the following explanations will focus on the vehicle's direction of travel, specifically the front-to-back direction, the width direction, and the vertical direction. The front-to-back direction refers to the direction along the vehicle's direction of travel; the vertical direction refers to the vehicle's vertical direction; and the width direction refers to the vehicle's lateral direction, which is perpendicular to both the front-to-back and vertical directions.

[0028] <Structure of the vehicle frame>

[0029] First, the structure of the vehicle frame on which the vehicle-mounted equipment mounting device of the present invention (hereinafter referred to as "vehicle-mounted equipment mounting device 1") is installed will be described.

[0030] It should be noted that the following description, as an example, illustrates the application of the vehicle-mounted device 1 of the present invention to mounting a battery to a vehicle frame. However, the vehicle-mounted device 1 of the present invention can also be used to mount devices other than batteries, such as exhaust purification devices, power conversion devices, etc.

[0031] Figure 1 This is a top view showing the appearance of the vehicle frame F. Figure 1 In the example of vehicle frame F, a vehicle frame for a truck is shown.

[0032] The vehicle frame F is the skeleton that supports the vehicle body (not shown). The vehicle frame F is, for example, composed of a pair of longitudinal beams Fs extending in the longitudinal direction of the vehicle and a crossbeam Fc extending in the width direction and connecting the pair of longitudinal beams Fs.

[0033] The longitudinal beam Fs is formed, for example, from a steel plate (also called a "channel steel") with a generally U-shaped cross-section. The longitudinal beam Fs has a generally U-shaped cross-section, with an open section on the inner side in the vehicle width direction and a generally planar sidewall section (hereinafter referred to as "frame sidewall section Fsa") on the outer side in the vehicle width direction.

[0034] In the longitudinal beam Fs, multiple through holes Fsaa are formed in such a way that they penetrate the frame sidewall portion Fsa of the longitudinal beam Fs (see reference). Figure 2Through holes Fsaa are formed at equal intervals on the frame sidewall portion Fsa, for example, at 40cm intervals in both the vertical and horizontal directions. The through holes Fsaa serve, for example, as bolt holes for bolt insertion. The aforementioned hole structure of the longitudinal beam Fs is configured to allow various on-board equipment to be installed at any position on the longitudinal beam Fs. It should be noted that weld nuts (not shown) for fastening bolts are provided on the inner surface of the through holes Fsaa in the vehicle width direction of the frame sidewall portion Fsa.

[0035] Battery B is mounted to longitudinal beam Fs via onboard equipment mounting device 1. Additionally, fuel tank N is mounted adjacent to the rear side of battery B on longitudinal beam Fs. It should be noted that, in addition to this, various onboard devices such as exhaust purification devices and power conversion devices are mounted on vehicle frame F (not shown).

[0036] Battery B, for example, consists of a battery body Bm and a battery bracket Bc (see reference). Figure 3 The battery holder Bc is box-shaped and houses the battery body Bm inside in a removable manner.

[0037] The battery bracket Bc has a mounting portion Bca on its inner side in the vehicle width direction, which is opposite to the frame side wall portion Fsa of the longitudinal beam Fs. This mounting portion Bca is fixed to one end of the connecting bracket 10 of the on-board equipment mounting device 1. Figure 2 The second side wall portion 10t). Furthermore, at a position spaced outward from the frame side wall portion Fsa of the longitudinal beam Fs in the vehicle width direction, the battery bracket Bc is connected to the frame side wall portion Fsa of the longitudinal beam Fs via the connecting bracket 10. It should be noted that bolt holes for inserting bolts 13 are formed in the mounting portion Bca.

[0038] <Detailed Structure of Vehicle-Mounted Equipment Mounting Device 1>

[0039] The detailed structure of the vehicle-mounted equipment mounting device 1 will be described below.

[0040] Figure 2 , Figure 3 This is a diagram showing the detailed structure of the vehicle-mounted equipment mounting device 1. It should be noted that... Figure 2 This indicates the state before battery B is installed in the vehicle equipment mounting device 1. Figure 3 This indicates the state after battery B is installed in the vehicle equipment mounting device 1.

[0041] Figure 4 This is a diagram showing the detailed structure of the connecting bracket 10 (here, only the rear connecting bracket 10B is shown). It should be noted that... Figure 4 For ease of explanation, the diagram shows the state in which bolts 12 and 13 are inserted into the bolt holes formed in the connecting bracket 10.

[0042] The vehicle-mounted equipment mounting device 1, for example, has a connecting bracket 10 as its main component. Moreover, the connecting bracket 10 is configured to support the battery B and connect the battery B to the longitudinal beam Fs at a position outside the longitudinal beam Fs in the vehicle width direction.

[0043] More specifically, the connecting bracket 10 consists of a rear connecting bracket 10B and a front connecting bracket 10F arranged front to back along the extension direction of the longitudinal beam Fs. Moreover, the rear connecting bracket 10B and the front connecting bracket 10F are configured to support the left and right sides of the battery B (battery bracket Bc).

[0044] The rear connecting bracket 10B is, for example, a steel plate that extends relatively long in the vertical direction, and is formed by bending the steel plate in a generally U-shaped or H-shaped (U-shaped in this embodiment) manner. Specifically, the rear connecting bracket 10B has a first side wall portion 10s, a second side wall portion 10t, and a third side wall portion 10u, thereby forming a shape that extends in the vertical direction and has an open portion on the rear side of the vehicle, with a generally U-shaped or H-shaped (U-shaped in this embodiment) cross-section.

[0045] The first sidewall portion 10s is shaped to follow the wall surface of the frame sidewall portion Fsa of the longitudinal beam Fs, and is fixed to the frame sidewall portion Fsa by abutting against it. It should be noted that bolt holes are formed in the first sidewall portion 10s, and the first sidewall portion 10s is fixed to the frame sidewall portion Fsa by bolts 12 inserted into the bolt holes formed in itself and the through holes Fsaa formed in the frame sidewall portion Fsa of the longitudinal beam Fs.

[0046] The second sidewall portion 10t is shaped along the mounting portion Bca of the battery tray Bc and abuts against the mounting portion Bca of the battery tray Bc, being fixed to the battery tray Bc at a position further outward in the vehicle width direction than the first sidewall portion 10s. It should be noted that bolt holes are formed in the second sidewall portion 10t, and the second sidewall portion 10t is fixed to the battery tray Bc by bolts 13 inserted into the bolt holes formed in itself and the through holes formed in the mounting portion Bca of the battery tray Bc.

[0047] The third sidewall portion 10u is the portion that extends outward from the first sidewall portion 10s in the vehicle width direction and connects the first sidewall portion 10s with the second sidewall portion 10t. The third sidewall portion 10u extends in the vehicle width direction, for example, by connecting the end of the first sidewall portion 10s at the front of the vehicle to the end of the second sidewall portion 10t at the front of the vehicle.

[0048] Furthermore, in the rear connecting bracket 10B, at least one reinforcing rib 11 is arranged substantially horizontally between the first side wall portion 10s and the second side wall portion 10t to maintain the shape of the rear connecting bracket 10B. In the rear connecting bracket 10B of this embodiment, a lower reinforcing rib 11a and an upper reinforcing rib 11b are arranged side by side between the first side wall portion 10s and the second side wall portion 10t. It should be noted that the lower reinforcing rib 11a and the upper reinforcing rib 11b are fixed to the wall surface of the first side wall portion 10s and the wall surface of the second side wall portion 10t, for example, by welding.

[0049] The front connecting bracket 10F, similar to the rear connecting bracket 10B, is a steel plate that extends relatively long in the vertical direction. This steel plate is formed by bending its cross-sectional shape into a generally U-shape or H-shape. The front connecting bracket 10F has a shape that is symmetrical to the rear connecting bracket 10B, and like the rear connecting bracket 10B, it has a first sidewall portion 10s, a second sidewall portion 10t, and a third sidewall portion 10u. The first sidewall portion 10s, the second sidewall portion 10t, and the third sidewall portion 10u cause the front connecting bracket 10F to be formed into a shape that extends in the vertical direction, has an open front side, and has a generally U-shaped or H-shaped (U-shaped in this embodiment) cross-section.

[0050] Furthermore, similarly to the rear connecting bracket 10B, the front connecting bracket 10F has at least one reinforcing rib 11 arranged substantially horizontally between the first side wall portion 10s and the second side wall portion 10t to maintain the shape of the front connecting bracket 10F. In the front connecting bracket 10F of this embodiment, a lower reinforcing rib 11a and an upper reinforcing rib 11b are arranged side by side between the first side wall portion 10s and the second side wall portion 10t.

[0051] It should be noted that the shapes of the connecting brackets 10 (rear connecting bracket 10B and front connecting bracket 10F) are designed with consideration of the standard dimensions of the battery B, the location of the bolts that can be fastened to the vehicle frame F, and the stress resistance characteristics of the connecting brackets 10. Generally, during a vehicle collision or when the vehicle is in motion, due to the inertial force accompanying the acceleration and deceleration of the vehicle, a lateral (i.e., horizontal) torque acts from the battery B to the connecting brackets 10 with a large extent around the mounting position of the battery B on the connecting brackets 10. In the connecting brackets 10 of this embodiment, from the viewpoint of improving the stress resistance characteristics against the lateral torque acting from the battery B, a structure is adopted in which the first sidewall portion 10s and the second sidewall portion 10t protrude more to the left and right than the left and right ends of the battery B when viewed from the battery B.

[0052] Here, the detailed structure of the reinforcing rib 11 of the connecting bracket 10 will be described.

[0053] Figures 5-7This is an enlarged view showing the detailed structure of the reinforcing rib 11 provided on the connecting bracket 10. It should be noted that... Figure 5 This is a diagram of the connecting bracket 10 as viewed from the side (outer side in the vehicle width direction). Figure 6 , Figure 7 This is a diagram of the connecting bracket 10 as viewed from an oblique angle above. Figure 7 This is a diagram of the connecting bracket 10 as viewed from an oblique angle above.

[0054] In the event of a vehicle collision (specifically, a collision at the front surface of the vehicle), the onboard equipment mounted on the longitudinal beam Fs moves forward relative to its mounting position on the longitudinal beam Fs due to inertial forces. Therefore, when designing the mounting method of the onboard equipment, from the perspective of protecting the onboard equipment, it is necessary to consider the possibility of collisions between adjacent onboard equipment (in this case, battery B and fuel tank N).

[0055] Regarding this point, in the vehicle-mounted equipment mounting device 1 of this embodiment, the rear end portion 10ta (representing the end portion on the rear side of the vehicle; the same applies below) of the second side wall portion 10t of the rear connecting bracket 10B is an edge, and this rear end portion 10ta protrudes further rearward than the battery B (battery bracket Bc). Therefore, in the event of a vehicle collision, the rear end portion 10ta of the second side wall portion 10t of the rear connecting bracket 10B may impact the fuel tank N, causing damage to the fuel tank N.

[0056] It should be noted that in the vehicle-mounted equipment mounting device 1 of this embodiment, the rear end of the first sidewall portion 10s of the rear connecting bracket 10B is also an edge, protruding further rearward than the battery B (battery bracket Bc). However, the first sidewall portion 10s is fixed to the longitudinal beam Fs in a state of abutting against the longitudinal beam Fs. Therefore, even in the event of a vehicle collision, the probability of the first sidewall portion 10s colliding with the fuel tank N is low.

[0057] In the vehicle-mounted equipment mounting device 1 of this embodiment, in order to suppress this situation, the rear end 11aa (representing the end on the rear side of the vehicle; the same applies below) of the reinforcing rib 11 (here, the lower reinforcing rib 11a) is configured to protrude further rearward than the rear end 10ta of the second sidewall portion 10t of the rear connecting bracket 10B. Therefore, in the event of a vehicle collision, the reinforcing rib 11 first impacts the fuel tank N. Thus, even if the rear end 10ta of the second sidewall portion 10t of the rear connecting bracket 10B subsequently impacts the fuel tank N, the impact force exerted by the rear end 10ta of the second sidewall portion 10t on the fuel tank N can be mitigated.

[0058] In addition, in this embodiment, the thickness of the reinforcing rib 11 (here, the lower reinforcing rib 11a) is set to be greater than the thickness of the second sidewall portion 10t of the rear connecting bracket 10B, thereby allowing the rear end portion 11aa of the reinforcing rib 11 to be considered as a surface. In this embodiment, in order to reduce the weight of the rear connecting bracket 10B, the thickness of the second sidewall portion 10t of the rear connecting bracket 10B is set to 5 mm or less, but the thickness of the lower reinforcing rib 11a is set to 7 mm or more. Therefore, compared to the maximum stress acting on the fuel tank N when the rear end portion 11aa of the second sidewall portion 10t of the rear connecting bracket 10B directly impacts the fuel tank N (i.e., the maximum stress acting on a certain point due to stress concentration), the maximum stress acting on the fuel tank N when the reinforcing rib 11 impacts the fuel tank N is more suppressed.

[0059] It should be noted that in the vehicle-mounted equipment mounting device 1 of this embodiment, only the lower reinforcing rib 11a (corresponding to the "first reinforcing rib" of the present invention) is configured to protrude further rearward than the rear end portion 10ta of the second side wall portion 10t of the rear connecting bracket 10B, while the upper reinforcing rib 11b is not configured to protrude further rearward than the rear end portion 10ta of the second side wall portion 10t of the rear connecting bracket 10B. Furthermore, regarding the upper reinforcing rib 11b, its plate thickness is set to be smaller compared to the lower reinforcing rib 11a.

[0060] This is because the upper reinforcing rib 11b is positioned near the upper end of the fuel tank N, resulting in a relatively large distance between the intended impact position of the fuel tank N and the upper reinforcing rib 11b. In other words, when multiple reinforcing ribs 11 are provided in the rear connecting bracket 10B, only the reinforcing rib 11 that is the object of collision with the fuel tank N during a vehicle collision (here, the lower reinforcing rib 11a) needs to be set to have a thickness greater than the thickness of the second side wall portion 10t of the rear connecting bracket 10B and to protrude further rearward than the rear end portion 10ta of the second side wall portion 10t of the rear connecting bracket 10B. This prevents the weight of the connecting bracket 10 from unnecessarily increasing. Furthermore, if the thickness of all the multiple reinforcing ribs 11 is set to be large, the deformation flexibility of the connecting bracket 10 (here, the rear connecting bracket 10B) will be reduced, and the overall strength of the connecting bracket 10 may also be reduced.

[0061] <Effect>

[0062] As described above, according to the vehicle-mounted device mounting device 1 of this embodiment, in the event of a vehicle collision, the reinforcing rib 11 (in the above embodiment, the lower reinforcing rib 11a) can impact the vehicle-mounted device (in the above embodiment, the fuel tank N) disposed adjacent to the rear of the connecting bracket 10 (rear connecting bracket 10B) before the rear end portion 10ta of the second side wall portion 10t of the connecting bracket 10 (rear connecting bracket 10B) is impacted. Therefore, it is possible to prevent the edge of the rear end portion 10ta of the second side wall portion 10t of the connecting bracket 10 (rear connecting bracket 10B) from impacting the vehicle-mounted device disposed adjacent to the rear of the connecting bracket 10 during a vehicle collision, thereby preventing damage to the vehicle-mounted device.

[0063] It should be noted that the above embodiment shows an example of the shape of the connecting bracket 10 that can be applied to the present invention. However, in the vehicle-mounted equipment mounting device 1 of the present invention, connecting brackets 10 of various shapes can be used. For example, as the connecting bracket 10, it is not necessary to use a connecting bracket that is separated into a rear connecting bracket 10B and a front connecting bracket 10F; a connecting bracket that is integrally formed can also be used.

[0064] Furthermore, in the above embodiment, a truck frame F is shown as an example of the application of the vehicle-mounted equipment mounting device 1. However, the vehicle-mounted equipment mounting device 1 of the present invention can also be applied to vehicle frames other than trucks.

[0065] The above provides a detailed description of specific examples of the present invention, but these are merely examples and not intended to limit the scope of the claims. The technology described in the claims includes various modifications and variations to the specific examples described above.

[0066] This application is based on Japanese patent application (Japan Patent Application No. 2021-50621) filed on March 24, 2021, the contents of which are incorporated herein by reference.

[0067] Industrial applicability

[0068] According to the vehicle-mounted equipment mounting device of the present invention, damage to vehicle-mounted equipment located on the rear side of the vehicle caused by the connecting bracket during a vehicle collision can be suppressed.

[0069] Explanation of reference numerals in the attached figures

[0070] 1. Vehicle-mounted equipment installation device

[0071] 10 Connecting brackets

[0072] 10B Rear Connector Bracket

[0073] 10F Front Connecting Bracket

[0074] 10s First sidewall

[0075] 10t Second sidewall

[0076] The rear end of the second sidewall of 10ta

[0077] 10u Third side wall

[0078] 11 Reinforcing Ribs

[0079] 11a Lower side reinforcing rib

[0080] The rear end of the lower reinforcing rib of 11aa

[0081] 11b Upper side reinforcing rib

[0082] 12 bolts

[0083] 13 bolts

[0084] B battery

[0085] Bc Battery Tray

[0086] Bca Installation Department

[0087] Bm battery body

[0088] F Vehicle Frame

[0089] Fc crossbeam

[0090] Fs longitudinal beam

[0091] Fsa frame sidewall

[0092] Fsaa through hole

Claims

1. A vehicle-mounted equipment mounting device, comprising using a connecting bracket to mount vehicle-mounted equipment to a vehicle frame extending in the longitudinal direction of the vehicle, wherein the vehicle-mounted equipment mounting device, The connecting bracket has a first sidewall portion that abuts against and is fixed to the sidewall portion of the vehicle frame; a second sidewall portion that is positioned opposite to and fixed to the on-board equipment at a location further outward in the vehicle width direction than the first sidewall portion; and a third sidewall portion that connects the first sidewall portion and the second sidewall portion. Furthermore, the first sidewall portion, the second sidewall portion, and the third sidewall portion cause the connecting bracket to have a generally U-shaped or H-shaped cross-section, extending vertically and having an open section at the rear of the vehicle. The connecting bracket also has a first reinforcing rib that is generally horizontally arranged between the first sidewall portion and the second sidewall portion. The rear end of the first reinforcing rib protrudes further into the rear of the vehicle than the rear end of the second sidewall portion.

2. The vehicle-mounted equipment installation device as described in claim 1, wherein, The thickness of the first reinforcing rib is greater than the thickness of the second sidewall portion.

3. The vehicle-mounted equipment installation device as described in claim 1, wherein, The connecting bracket has multiple reinforcing ribs arranged side by side between the first side wall and the second side wall. At least one of the multiple reinforcing ribs constitutes the first reinforcing rib.

4. The vehicle-mounted equipment installation device as described in claim 3, wherein, The first reinforcing rib among the plurality of reinforcing ribs has a thicker plate thickness than the other reinforcing ribs.

5. The vehicle-mounted equipment installation device as described in claim 1, wherein, The on-board equipment is an on-board battery.

6. The vehicle-mounted equipment installation device as described in claim 1, wherein, A fuel tank is located adjacent to the vehicle-mounted equipment on the rear side of the vehicle.

7. The vehicle-mounted equipment installation device as described in claim 1, wherein, The connecting bracket is configured in such a way that it is divided into two connecting brackets, a front connecting bracket and a rear connecting bracket, which are arranged front to back along the extension direction of the vehicle frame. The first sidewall portion, the second sidewall portion, and the third sidewall portion cause the rear connecting bracket to have a shape that extends in the vertical direction and is open on the rear side of the vehicle, with a cross-section that is approximately U-shaped or H-shaped.

8. The vehicle-mounted equipment installation device as described in claim 1, wherein, The rear end of the first reinforcing rib protrudes further into the rear of the vehicle than the rear end of the on-board equipment.

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