Vehicle-mounted device fixing structure

Abstract

This fixing structure for a vehicle-mounted apparatus is installed between a rear side of a rear wheel house of a vehicle and a vehicle body rear wall, and comprises: a side member provided to extend in the vehicle front-rear direction; a tray for placing the vehicle-mounted apparatus; and a plurality of tray attachment parts which are provided to a bottom wall part of the tray and through which bolts for attaching the tray to the vehicle body pass, wherein among the plurality of attachments parts, a tray attachment part, which is positioned innermost in the vehicle width direction, is attached to a side member, and the remaining attachment parts are attached to a rear floor panel.

Description

[Technical field]

[0001] The present disclosure relates to a fixing structure for an in-vehicle device. [Background technology]

[0002] In some cases, on-board equipment such as a battery or high-voltage equipment is installed between the rear wheel house of a vehicle and the rear wall of the vehicle body. As a structure for fixing on-board equipment to the vehicle body in such a location, for example, Patent Document 1 discloses a fixing structure for on-board equipment intended to reduce the working space required for installing a battery.

[0003] The fixing structure for in-vehicle equipment of Patent Document 1 includes a base member that is attached to the vehicle body and has a bottom wall portion, a first side wall portion, and a second side wall portion, a battery as in-vehicle equipment that is placed on the base member and has a first side portion abutting the first side wall portion, a second side portion abutting the second side wall portion, a third side portion provided on the opposite side of the first side portion, and a fourth side portion provided on the opposite side of the second side portion, a retaining member that is provided on the third side portion side and the fourth side portion side and has a third side retaining portion abutting the third side portion, a fourth side retaining portion abutting the fourth side portion, and a fastening portion that is attached to the bottom wall portion and formed in an approximately plate shape, and an in-vehicle equipment locking portion that suppresses movement of the battery toward the upper side of the vehicle. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 6544311 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the case of the fixing structure of the in-vehicle device disclosed in the above-mentioned Patent Document 1, the battery is sandwiched in the vehicle front-rear direction by the first side wall of the base member abutting the first side portion of the battery and the third side holding portion of the holding member abutting the third side portion of the battery, and similarly, the battery is sandwiched in the vehicle width direction by the second side wall of the base member abutting the second side portion of the battery and the fourth side holding portion of the holding member abutting the fourth side portion of the battery. Therefore, the movement of the battery in a substantially horizontal plane is suppressed. Furthermore, the movement of the battery in the vehicle up-down direction is also suppressed by the in-vehicle device locking portion.

[0006] In this way, in the fixing structure of Patent Document 1, the battery is fixed to the base member and then to the vehicle body so that movement in the vehicle front-rear direction, vehicle width direction, and vehicle up-down direction is all suppressed, so that, for example, if a collision load in the front-rear direction is input to the vehicle body during a rear collision, the collision load may act directly from the vehicle body to the base member and from the base member to the battery, causing a large impact on the battery. Patent Document 1 does not disclose a structure that protects the battery by mitigating the collision load input from the vehicle body to the base member and from the base member to the battery.

[0007] Therefore, in consideration of the above problems, at least one embodiment of the present invention aims to provide a fixing structure for on-board equipment that protects the on-board equipment by mitigating the collision load input to the on-board equipment installed between the rear wheel house of the vehicle and the rear wall of the vehicle body at the rear of the vehicle's rear wheel house during a rear collision. [Means for solving the problem]

[0008] (1) Invented to achieve the above-mentioned object, at least one embodiment of the present invention is a fixing structure for on-vehicle equipment that is installed between a rear wheel house of a vehicle and a rear wall of the vehicle body behind the rear wheel house, the fixing structure having a side member provided on an underside of a rear floor panel on the vehicle inside side of the rear wheel house so as to extend in the fore-and-aft direction of the vehicle, a tray on which the on-vehicle equipment is placed, and a plurality of tray mounting portions provided on a bottom wall of the tray and through which bolts for mounting the tray to the vehicle body pass, the innermost of the plurality of tray mounting portions in the vehicle width direction. And the rearmost in the vehicle's fore-aft direction The tray attachment portion is located at Only , the tray mounting portions are attached to the side member, and the remaining multiple tray mounting portions are attached to the rear floor panel.

[0009] According to such a configuration (1), in the event of a rear-end collision of the vehicle, the collision load is transmitted through the side members provided on the underside of the rear floor panel and extending in the fore-and-aft direction of the vehicle, and is also applied to the tray on which the in-vehicle equipment is placed. At that time, among the multiple tray mounting parts that mount the tray to the vehicle body, the tray mounting part located on the innermost side in the vehicle width direction is attached to the side members, and the remaining multiple tray mounting parts are attached to the rear floor panel. Therefore, since a strong collision load is applied to the tray mounting part located on the innermost side in the vehicle width direction, the innermost tray mounting part is likely to break. Since the remaining tray mounting parts are attached at multiple points, the collision load is distributed, and the tray mounting parts are not likely to break because they are attached to the rear floor panel and not to the side members to which the collision load is directly transmitted.

[0010] Therefore, by actively breaking only the tray attachment portion located on the innermost side in the vehicle width direction, the collision load acting on the tray during a rear-end collision can be absorbed and mitigated. Also, since the remaining tray attachment portions are not easily broken, the tray can hold the on-board equipment.

[0011] (2) In some embodiments, a battery bracket is provided between the rear floor surface and the tray mounting portion so that the tray mounting portion is positioned above the rear floor surface.

[0012] According to this configuration (2), the tray mounting portion is positioned above the rear floor surface by the battery bracket, so that the flow of the collision load during a rear-end collision that travels along the rear floor is absorbed by the battery bracket and input to the tray mounting portion, thereby mitigating the collision load on the tray during a rear-end collision.

[0013] (3) In some embodiments, the battery bracket is disposed on the innermost side in the vehicle width direction. And the rearmost in the vehicle's fore-aft direction and a second battery bracket to which the remaining plurality of tray mounting parts are attached.

[0014] According to this configuration (3), the battery bracket is divided into a first battery bracket and a second battery bracket and installed, the first battery bracket portion is attached to the side member via the rear floor panel, and the second battery bracket portion is attached to the rear floor panel. Therefore, the collision load is efficiently applied from the side member through the first battery bracket to the tray mounting portion located most inward in the vehicle width direction, causing the tray mounting portion to break.

[0015] (4) In some embodiments, the first battery bracket is characterized in that one end is connected to the rear end of the side member via the rear floor panel and the other end is connected to the rear body wall, and is provided on a reinforcing member that bridges between the side member and the rear body wall.

[0016] According to this configuration (4), the first battery bracket is provided on a reinforcing member that bridges the side member and the rear wall of the vehicle body. Therefore, the first battery bracket is installed in a position where both the rear impact load transmitted from the side member and the rear impact load transmitted from the rear wall of the vehicle body act, and the rear impact load can be effectively transmitted to the first battery bracket.

[0017] (5) In some embodiments, the bottom wall portion of the tray on which the in-vehicle device is placed has a generally rectangular shape in a plan view, and a chamfer is formed on the corner portion on the vehicle inner side facing the rear wheel house.

[0018] According to this configuration (5), the bottom wall portion of the tray is formed in an approximately rectangular shape in a plan view, and the corner portion of the bottom wall portion on the vehicle inner side facing the rear wheel house is formed in a chamfered shape, so that even if the tray rotates clockwise during a rear-end collision, the amount of interference between the tray and the rear wheel house is reduced.

[0019] That is, the tray on which the on-board equipment is placed is installed on the vehicle outer side of the side member, and is configured so that a strong collision load in the event of a rear-end collision is applied only to the tray attachment portion located on the innermost side in the vehicle width direction, so that a rotational force is generated in the bottom wall portion of the approximately rectangular tray such that the corner on the vehicle inner side facing the rear wheel house approaches the rear wheel house in a plan view from above the vehicle. The amount of interference between the bottom wall portion of the tray and the rear wheel house against such rotation of the tray is reduced, and the on-board equipment is protected.

[0020] (6) In some embodiments, the bottom wall of the tray on which the in-vehicle device is placed has a generally rectangular shape in a plan view, and a rear wall is provided on one side of the tray facing the rear wall of the vehicle body.

[0021] According to this configuration (6), the bottom wall portion of the tray is formed in a substantially rectangular shape in a plan view, and a rear wall portion is erected on one side of the bottom wall portion facing the rear wall of the vehicle body. Therefore, even if the tray rotates clockwise during a rear collision and the rear wall of the vehicle body moves toward the front of the vehicle, the rear wall portion prevents interference between the in-vehicle equipment and the rear wall of the vehicle body, thereby protecting the in-vehicle equipment.

[0022] (7) In some embodiments, the tray is made of resin and is integrally molded.

[0023] According to this configuration (7), the tray is made of resin and is molded as a single piece, which makes it easy to manufacture the tray. Also, because the tray is made of resin, it is possible to easily cause breakage in the periphery of the bolt hole by the bolt at the tray attachment portion located at the innermost position in the vehicle width direction where the tray is attached to the side member to which a strong rear-end collision load is applied. Effect of the Invention

[0024] According to at least one embodiment of the present invention, it is possible to protect on-board equipment installed behind the rear wheel house of the vehicle and between the rear wall of the vehicle body by mitigating a collision load input to the on-board equipment during a rear collision. [Brief description of the drawings]

[0025] [Figure 1] 1 is a perspective view of a battery fixed by an in-vehicle device fixing structure according to an embodiment of the present invention, as viewed from the rear of the vehicle. [Diagram 2] FIG. 4 is an exploded perspective view showing a state in which the battery is placed on the tray and fixed. [Diagram 3] FIG. 4 is an enlarged perspective view of a mounting portion of the tray bracket. [Figure 4] 2 is a side view in the vehicle front-rear direction showing the battery placed and fixed on the tray. FIG. [Diagram 5] 5 is a cross-sectional view taken along line A-A in FIG. 4. [Figure 6] FIG. 2 is a perspective view showing a configuration of a vehicle body to which a tray is fixed. [Figure 7] 7 is a cross-sectional view taken along line BB in FIG. 6. [Figure 8] FIG. 4 is a perspective view illustrating a transmission state of a collision load during a rear collision. [Figure 9] 11 is a perspective view illustrating an interference mitigation portion between the tray and the battery and the vehicle body in the event of a rear-end collision. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0026] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. However, the relative arrangement of components described as an embodiment or shown in the drawings is not intended to limit the scope of the present invention, but is merely an explanatory example. Note that the directions of up, down, front, back, left and right in the description are defined as the direction in which a passenger looks forward from the driver's seat. In each figure, "FR" indicates the front, "LH" indicates the left, and "UPR" indicates the top.

[0027] Fig. 1 shows one embodiment of the present invention, and illustrates a state in which, as an in-vehicle device, for example, a battery 3 is fixed to a vehicle body by an in-vehicle device fixing structure 1. Fig. 1 is a perspective view of the battery 3 as an in-vehicle device, as seen from the rear of the vehicle.

[0028] 1, in this embodiment, a vehicle 5 has a luggage compartment 7 at the rear of the vehicle, and an openable / closable tailgate (not shown) at the rear end. The fixing structure 1 for on-vehicle equipment of the present invention is provided on the right side in the vehicle width direction within the luggage compartment 7, on a rear floor panel 13 between the rear of a rear wheel house 9 and the front of a rear wall 11 of the vehicle body.

[0029] Furthermore, the vehicle-mounted equipment fixing structure 1 is mainly disposed on the vehicle outer side of a pair of left and right side members 15 extending in the front-rear direction of the vehicle on the underside of a rear floor panel 13 on the vehicle inner side of the rear wheel house 9.

[0030] The rear body wall 11 behind the battery 3 is formed by the lower end portions of rear pillars 19 that form the left and right sides of the rear gate opening 17, and the left and right end portions of a rear end cross member 21 that forms the lower side of the rear gate opening 17.

[0031] Although the battery 3 is shown as the on-board device, the present invention is not limited thereto and may be high-voltage equipment installed in an electric vehicle, etc. Also, although an example in which the fixing structure 1 for the on-board device is provided on the right side in the vehicle width direction within the luggage compartment 7 will be described, the fixing structure 1 may be provided on the left side in the vehicle width direction.

[0032] The fixing structure 1 for in-vehicle equipment has a tray 23 on which the battery 3 is placed and which is attached to the vehicle body, and is provided with a battery fixing structure 25 which fixes the battery 3 to the tray 23, and a tray fixing structure 27 which fixes the tray 23 to the vehicle body. The battery fixing structure 25 and the tray fixing structure 27 will be described below.

[0033] (Battery Fixing Structure) An embodiment of the battery fixing structure 25 will be described. As shown in Figures 1 and 2, the battery fixing structure 25 has a tray 23 on which the battery 3 is placed and which is attached onto the rear floor panel 13. The tray 23 is provided with a vehicle width direction fixing means 29 which fixes the placed battery 3 in the vehicle width direction, a vertical direction fixing means 31 which fixes the battery 3 in the vehicle vertical direction, and a front-rear direction support means 33 which supports the battery 3 so that it can move in the vehicle front-rear direction, and further, the tray 23 is provided with a movement amount restricting means 35 which restricts the movement in the vehicle front-rear direction to a predetermined amount.

[0034] As shown in FIG. 2, the battery 3 placed on the tray 23 is a rectangular box with positive and negative electrode terminals 37 provided on the upper surface, and ribs 39 (39a, 39b, 39c, 39d) protruding from the side of the battery 3 and extending along each side are formed at the lower end of each of the four sides of the rectangular shape.

[0035] As shown in Figure 2, the tray 23 has a bottom wall portion 41 that is formed in an approximately rectangular shape when viewed in a plan view from above the vehicle, on which the battery 3 is placed, and each side of the approximately rectangular shape of the bottom wall portion 41 is installed so as to extend in the fore-and-aft direction and the width direction of the vehicle.

[0036] Furthermore, as shown in FIG. 2, the tray 23 is provided with a front wall portion 43 that stands upward from the front end of the bottom wall portion 41 and extends in the vehicle width direction, a rear wall portion 45 that stands upward from the rear end of the bottom wall portion 41 and extends in the vehicle width direction, and an outer wall portion 47 that stands upward from the outer end of the bottom wall portion 41 in the vehicle width direction and extends in the fore-and-aft direction of the vehicle.

[0037] As shown in FIG. 2, the tray 23 has a tray bracket 49 which is formed as a separate member from the tray 23, is detachably attached to the inner end of the bottom wall portion 41 of the tray 23 in the vehicle width direction, and fixes the battery 3 in the vehicle width direction by sandwiching it between the second outer wall portion 47b of the outer wall portion 47 which will be described later.

[0038] The outer wall portion 47 is composed of a first outer wall portion 47a on the outer side in the vehicle width direction, a second outer wall portion 47b which is located inward in the vehicle width direction from the first outer wall portion 47a and has a lower height than the first outer wall portion, and extends in the vehicle fore-and-aft direction at approximately the center of the tray 23 in the vehicle fore-and-aft direction, and a third outer wall portion 47c which is located inward in the vehicle width direction from the first outer wall portion 41a and has a lower height than the first outer wall portion 47a, and extends in the vehicle fore-and-aft direction at the rear end of the tray 23 in the vehicle fore-and-aft direction.

[0039] The first outer wall portion 47a and the rear wall portion 45 have the same height (approximately half the height of the battery 3), and the rear end portion of the first outer wall portion 47a is connected to the outer end portion in the vehicle width direction of the rear wall portion 45. The rear end portion of the third outer wall portion 47c is also connected to the outer end portion in the vehicle width direction of the rear wall portion 45. Reinforcing ribs 51 are installed in the vehicle width direction between the first outer wall portion 47a and the second outer wall portion 47b, and between the first outer wall portion 47a and the third outer wall portion 47c.

[0040] A vehicle outer engagement groove (outer vertical engagement portion) 53 is provided on the inner surface of the second outer wall portion 47b, which engages with a rib 39a formed on the outer side of the battery 3 in the vehicle width direction, extending in the front-to-rear direction of the vehicle, and is configured to restrict movement of the battery 3 in the vehicle width direction and vertical directions while allowing movement in the front-to-rear direction.

[0041] In addition, as shown in FIG. 2, the tray bracket 49 has a vehicle inner engagement groove (inner vertical engagement portion) 55 extending in the front-rear direction of the vehicle which engages with a rib 39c formed on the inner side of the battery 3 in the vehicle width direction, and is configured to restrict movement of the battery 3 in the vehicle width direction and vertical directions while allowing movement in the front-rear direction.

[0042] As shown in FIG. 2, the second outer wall portion 47b of the outer wall portion 47 and the tray bracket 49 constitute a vehicle width direction fixing means 29 that fixes the battery 3 in the vehicle width direction, a vertical direction fixing means 31 that fixes the battery 3 in the vertical direction, and a fore-aft direction support means 33 that supports the battery 3 to allow movement in the fore-aft direction of the vehicle.

[0043] Figures 4 and 5 show the vehicle width direction fixing means 29, the up-down direction fixing means 31, and the front-rear direction support means 33. Figure 4 is a side view in the vehicle front-rear direction showing the state in which the battery 3 is placed on and fixed on the tray 23, and Figure 5 is a cross-sectional view of the battery 3 along line AA in Figure 4, in the vehicle width direction.

[0044] As shown in Fig. 5, a rib 39a formed at the lower end of the side surface of the battery 3 on the outer side in the vehicle width direction engages with a vehicle outer engagement groove (outer vertical engagement portion) 53 formed on the inner surface of the second outer wall portion 47b, and an inclined surface 53a of the vehicle outer engagement groove 53 abuts against an inclined surface 39aa of the rib 39a. Furthermore, a vehicle inner engagement groove (inner vertical engagement portion) 55 of the tray bracket 49 engages with a rib 39c formed at the lower end of the side surface of the battery 3 on the inner side in the vehicle width direction, and an inclined surface 55a of the vehicle inner engagement groove 55 abuts against an inclined surface 39ca of the rib 39c. This fixes the battery 3 in the vehicle width direction and the vertical direction, and supports it so as to be movable in the vehicle front-rear direction.

[0045] Further, a front wall portion 43 and a rear wall portion 45 provided at the front and rear ends of the tray 23 constitute a movement amount restricting means 35 that restricts the movement in the front-rear direction of the vehicle to a predetermined amount.

[0046] This movement amount restriction means 35 is shown in Fig. 4. Fig. 4 is a side view in the vehicle longitudinal direction showing a state in which the battery 3 is placed and fixed on the tray 23. A front wall portion 43 and a rear wall portion 45 are provided so that a predetermined amount of movement (gap S) exists with respect to the tips of ribs 39b, 39d protruding from the lower ends of the front and rear side surfaces of the battery 3.

[0047] According to one embodiment of the battery fixing structure 25 described above, the battery 3 is fixed on the tray 23 by the vehicle width direction fixing means 29 and the up-down direction fixing means 31, so that movement in the vehicle width direction and up-down direction is restricted. Furthermore, in the vehicle front-rear direction, the battery is supported by the front-rear direction support means 33 so as to allow movement in the front-rear direction, and the amount of movement is restricted by the movement amount restricting means 35. That is, a predetermined amount of movement (gap S in FIG. 4) is set in the front-rear direction, and the battery is supported on the bottom wall portion 41 of the tray 23.

[0048] Therefore, when the collision load in the fore-and-aft direction of the vehicle acts from the tray 23 to the battery 3 during a rear-end collision, a predetermined movement amount (gap S) is set which allows the battery 3 to move in the fore-and-aft direction relative to the tray 23, so that the load input to the battery 3 is reduced as the gap S moves, and the impact on the battery 3 is mitigated.

[0049] In addition, since the movement amount control means 35 is composed of a front wall portion 43 erected at the front end of the tray 23, and a rear wall portion 45 erected at the rear end of the tray 23, the movement amount of the battery 3 in the fore-and-aft direction of the vehicle can be reliably controlled to a predetermined amount, and the front wall portion 43 and the rear wall portion 45 prevent the battery 3 from interfering with front and rear vehicle body components and being damaged in the event of a rear-end collision.

[0050] In addition, since the vehicle width direction fixing means 29, the vertical direction fixing means 31, and the front-rear direction support means 33 are constituted by the second outer wall portion 47b of the outer wall portion 47, and the tray bracket 49 detachably attached to the inner end portion of the bottom wall portion 41 of the tray 23 so as to sandwich the battery 3 between the second outer wall portion 47b and the tray bracket 49, the battery 3 can be easily mounted on the tray 23 from inside the vehicle, that is, from inside the luggage compartment 7, and removed from the tray 23 (direction of arrow E in FIG. 2) by attaching and removing the tray bracket 49. This is particularly effective when the battery 3 is installed in a location where it is difficult to secure space in the front and rear, such as the battery 3 installed between the rear wheel house 9 and the vehicle rear wall 11 behind the vehicle.

[0051] In addition, the vehicle width direction fixing means 29 and the vertical direction fixing means 31 are composed of a vehicle outer engagement groove 53 formed on the inner surface of the second outer wall portion 47b and a vehicle inner engagement groove 55 formed in the tray bracket 49, and the inclined surface 53a of the vehicle outer engagement groove 53 abuts against the inclined surface 39aa of the rib 39a formed at the lower end of the vehicle width direction outer side surface of the battery 3, and the inclined surface 55a of the vehicle inner engagement groove 55 abuts against the inclined surface 39ca of the rib 39c formed at the lower end of the vehicle width direction inner side surface of the battery 3, so that a vehicle width direction restraining force and a vertical direction restraining force act on the inclined surfaces of the ribs 39a, 39c of the battery 3, thereby reliably fixing the battery 3 in the vehicle width direction and in the vertical direction.

[0052] Furthermore, since the vehicle outer engaging groove 53 and the vehicle inner engaging groove 55 are each formed extending in the vehicle front-rear direction, the battery 3 can be supported so as to be movable in the vehicle front-rear direction.

[0053] 2 and 3, in some embodiments of the battery fixing structure 25, the tray bracket 49 extends in the front-rear direction of the vehicle and has a generally L-shaped cross section formed by a bottom surface portion 49a attached to the bottom wall portion 41 of the tray 23 and an upright surface portion 49b erected from the bottom surface portion 49a. The bottom surface portion 49a is provided with one bolt fastening portion 57 for attaching the tray bracket 49 to the bottom wall portion 41 of the tray 23, and a rotation prevention portion 59 for the tray bracket 49. In addition, a vehicle inner engagement groove 55 is formed in the upright surface portion 49b.

[0054] According to this configuration, the tray bracket 49 is positioned and fixed on the bottom wall portion 41 of the tray 23 by fastening the bolt 61 to the bolt fastening portion 57, so that the tray bracket 49 can be stably and reliably attached to the tray 23.

[0055] Furthermore, since there is only one bolt fastening portion 57, the attachment and removal of the tray bracket 49 can be easily performed, and the battery 3 can be easily mounted on and removed from the tray 23.

[0056] Furthermore, since the tray bracket 49 is prevented from rotating and positioned by the anti-rotation portion 59, the support of the battery 3 by the tray bracket 49 is stabilized, which contributes to limiting movement of the battery 3 in the front-rear direction.

[0057] In some embodiments of the battery fixing structure 25, as shown in Figures 2 and 3, the upper end portion of the vertical portion 49b of the tray bracket 49 is bent toward the battery 3 to form a vehicle inner engagement groove 55, and this vehicle inner engagement groove 55 has an inclined surface (tray bracket abutment portion) 55a that abuts against the inclined surface 39ca of the rib 39c of the battery 3, extending in the fore-and-aft direction of the vehicle.

[0058] Furthermore, at both ends of the tray bracket 49, pressing means 63 are formed which, when the bolts 61 are fastened to the bolt fastening portions 57, cause the inclined surfaces 55a to press the ribs 39c of the battery 3 downward and outward from the vehicle.

[0059] Furthermore, a bolt fastening portion 57 is provided in the longitudinal center of the bottom surface portion 49a of the tray bracket 49, and folded-back portions 65 are formed at both longitudinal ends of the bottom surface portion 49a by bending the inner side in the vehicle width direction upward. And, a protrusion 67 is formed on the bottom wall portion 41 of the tray 23 corresponding to the position of the folded-back portion 65 so as to be higher toward the inner side in the vehicle width direction, as shown in FIG.

[0060] The bottom surface 49a of the tray bracket 49 is formed with reinforcing beads 69 and cutouts 71 that facilitate the manufacture of the folded-back portion 65.

[0061] The pressing means 63 is composed of a folded portion 65 bent upward from the bottom surface portion 49a of the tray bracket 49, and a protrusion 67 formed on the bottom wall portion 41 of the tray 23. When the bolt 61 is fastened to the bolt fastening portion 57, the folded portion 65 is pressed against the upper surface of the protrusion 67, and a force is applied to both ends in the front-rear direction of the vertical portion 49b of the tray bracket 49 to cause the vertical portion 49b to fall toward the battery 3. As a result, the inclined surfaces (tray bracket abutment portions) 55a at both ends in the front-rear direction of the vertical portion 49b of the tray bracket 49 press the rib 39c downward and outward in the vehicle width direction.

[0062] With this configuration, the tightening force of the tray bracket 49 when the bolts are tightened can be concentrated from both the front and rear ends of the tray bracket 49 to the rib 39c side via the pressing means 63, so that the battery 3 can be stably fixed in the vehicle width direction, fixed in the up and down direction, and supported so that it can be moved in the vehicle fore and aft direction by tightening the bolts at one point.

[0063] 3, a protrusion 67 is formed on the bottom wall 41 of the tray 23 at a position where the folded-back portion 65 of the tray bracket 49 abuts, and a groove 68 is formed between the two protrusions 67, 67 in the front-rear direction of the vehicle, and the groove 68 constitutes the rotation prevention portion 59 of the tray bracket 49. That is, the rotation of the tray bracket 49 is prevented by sandwiching the central portion of the tray bracket 49 where the folded-back portion 65 is not formed, inside the groove 68. The rotation prevention is also achieved by the folded-back portion 65 being pressed against the upper surface of the protrusion 67.

[0064] (Tray fixing structure) Next, an embodiment of the tray fixing structure 27 will be described. As shown in Fig. 2, the bottom wall portion 41 of the tray 23 is provided with a plurality of, for example, four tray mounting portions 75a, 75b, 75c, and 75d, through which bolts 73 for mounting the tray 23 to the vehicle body pass. The bolt axes of the two tray mounting portions 75a, 75b on the outer side in the vehicle width direction are inclined toward the inside of the vehicle in consideration of the ease of fastening the bolts 73.

[0065] Of the four tray mounting portions 75a, 75b, 75c, and 75d, the tray mounting portion 75d that is positioned most inward in the vehicle width direction is attached to the side member 15, and the remaining multiple tray mounting portions, here three, 75a, 75b, and 75c, are attached to the rear floor panel 13.

[0066] 6 and 7 show the configuration of the vehicle body side to which the tray 23 is fixed. The side members 15 have an inverted hat-shaped (concave shape that opens upward) cross section and are provided on the underside of the rear floor panel 13 along the sides of the rear wheel house 9, and extend in the front-rear direction of the vehicle in a pair on the left and right.

[0067] A battery bracket 77 is provided between the bottom wall portion 41 of the tray 23 and the rear floor panel 13, and the tray mounting portions 75a, 75b, 75c, 75d are positioned one step above the rear floor surface of the rear floor panel 13.

[0068] As shown in FIG. 6, this battery bracket 77 is divided into a first battery bracket 79 to which the tray mounting portion 75d, which is located innermost in the vehicle width direction, is attached, and a second battery bracket 81 to which the remaining three tray mounting portions 75a, 75b, 75c are attached, and are installed as separate parts.

[0069] According to one embodiment of the tray fixing structure 27 described above, as shown in Fig. 8, in the event of a rear-end collision of the vehicle, a rear-end collision load F input to the rear bumper beam 83 arranged in the vehicle width direction at the rear end of the vehicle is transmitted to the bumper stay 85 which supports the rear bumper beam 83 and has a crash box therein. Because the bumper stay 85 is connected to the rear end of the side member 15, the rear-end collision load F is transmitted through the side member 15 which is provided on the underside of the rear floor panel 13 and extends in the fore-aft direction of the vehicle, and is also applied to the tray 23 on which the battery 3 is placed.

[0070] At that time, of the four tray mounting portions 75a, 75b, 75c, and 75d that attach the tray 23 to the vehicle body, the tray mounting portion 75d that is positioned most inward in the vehicle width direction is attached to the side member 15 (part C in Figure 8), and the remaining three tray mounting portions 75a, 75b, and 75c are attached to the rear floor panel 13 (part D in Figure 8), so that a strong rear-end collision load F is applied only to the tray mounting portion 75d that is positioned most inward in the vehicle width direction.

[0071] Therefore, breakage is more likely to occur at the innermost tray mounting portion 75d, but the remaining tray mounting portions 75a, 75b, 75c are attached to the rear floor panel 13 at three points, so that the collision load is distributed and, since they are attached to the rear floor panel 13 rather than to the side member 15 to which the collision load is directly transmitted, these tray mounting portions 75a, 75b, 75c are less likely to break.

[0072] Therefore, by actively breaking only the tray mounting portion 75d that is located most inward in the vehicle width direction, the rear collision load F acting on the tray 23 during a rear collision can be absorbed and mitigated. In addition, the remaining tray mounting portions 75a, 75b, 75c are not easily broken, so the battery 3 is held on the tray 23.

[0073] The breakage of tray attachment portion 75d refers to the peripheral portion of the bolt through-hole being crushed by bolt 73, or the peripheral portion of the bolt through-hole being cracked, resulting in breakage.

[0074] Because the battery bracket 77 positions the tray mounting portions 75a, 75b, 75c, and 75d one step above the rear floor surface, the flow of the collision load during a rear collision that travels along the rear floor is absorbed by the battery bracket 77 and input to the tray mounting portions 75a, 75b, 75c, and 75d, thereby mitigating the collision load input to the tray 23 during a rear collision.

[0075] In addition, the battery bracket 77 is divided into a first battery bracket 79 and a second battery bracket 81, with the first battery bracket 79 portion being attached to the side member 15 via the rear floor panel 13, and the second battery bracket 81 portion being attached to the rear floor panel 13. Therefore, the collision load is efficiently applied to the tray mounting portion 75d, which is positioned most inward in the vehicle width direction, from the side member 15 via the first battery bracket 79, thereby more effectively causing the tray mounting portion 75d to break.

[0076] In some embodiments of the tray fixing structure 27, as shown in FIG. 6, the second battery bracket 81 is welded and attached onto the rear floor panel 13 between the rear of the vehicle's rear wheel house 9 and the front of the rear body wall 11, and a nut 87 into which the bolt 73 for attaching the tray 23 screws is welded to the top surface of the bulge.

[0077] One end of the first battery bracket 79 is connected to the rear end of the side member 15 via the rear floor panel 13, and the other end is connected to the vehicle body rear wall 11 and is provided on a brace member (reinforcing member) 89 that reinforces the vehicle body rear wall 11. A nut 87 into which a bolt 73 for attaching the tray 23 is screwed is welded to the top surface of the bulging portion of the first battery bracket 79.

[0078] This brace member 89 is a sheet metal member having one end bolted to the approximately horizontal flange portion of the side member 15 at the rear end of the side member 15, and the other end bolted to the lower end of the approximately vertical rear pillar 19 which forms the rear wall 11 of the vehicle body, and the end of the rear end cross member 21, spanning at an angle in the fore-and-aft direction of the vehicle, and reinforcing the rear wall 11 of the vehicle body by means of a so-called brace structure.

[0079] Although FIG. 6 shows an example in which first battery bracket 79 is formed as a separate part from brace member 89 and attached by welding, it may be formed integrally with brace member 89 by causing a portion of brace member 89 to bulge.

[0080] According to this configuration, the first battery bracket 79 is provided on the brace member 89 that bridges between the side member 15 and the lower end of the rear pillar 19, which is the vehicle body rear wall 11, and the end of the rear end cross member 21, so that the first battery bracket 79 is subjected to both a rear impact load transmitted from the side member 15 and a rear impact load transmitted from the lower end of the rear pillar 19 and the end of the rear end cross member 21. Therefore, the rear impact load can be effectively transmitted to the first battery bracket 79.

[0081] In some embodiments of the tray fixing structure 27, as shown in Fig. 9, the bottom wall portion 41 of the tray 23 has a generally rectangular shape in a plan view, and a chamfer 91 is formed at a corner G on the vehicle inner side on the rear wheel house 9 side. Fig. 9 shows a state in which the tray 23 is attached onto the battery bracket 77.

[0082] According to this configuration, the tray mounting portion 75d located most inward in the vehicle width direction is attached to the side member 15, and the remaining three tray mounting portions 75a, 75b, 75c are attached to the rear floor panel 13. Therefore, a strong rear impact load F is applied only to the tray mounting portion 75d located most inward in the vehicle width direction, and a clockwise rotational force R is generated in the remaining three portions (see FIG. 8). Then, a clockwise rotational force is generated in the tray 23 and the battery 3 as well.

[0083] In this case, as shown in FIG. 9, a chamfer 91 is formed at a corner G of the approximately rectangular bottom wall portion 41 of the tray 23 on the vehicle inner side facing the rear wheel house 9, so that even if the tray 23 rotates clockwise, the amount of interference of the corner G with the rear wheel house 9 is reduced.

[0084] Furthermore, as shown in Figure 9, a rear wall portion 45 is erected from the bottom wall portion 41 of the tray 23 on one side facing the rear wall 11 of the vehicle body. Therefore, even if the tray 23 and the battery 3 rotate clockwise at the rear wall portion 45 (part H in Figure 9) and the rear wall 11 moves toward the front of the vehicle, the rear wall portion 45 prevents interference between the battery 3 and the lower end of the rear pillar 19 of the rear wall 11 of the vehicle body and the end of the rear end cross member 21, thereby protecting the battery 3.

[0085] In the embodiment described above, the tray 23 is characterized by being made of resin and being integrally molded. With this configuration, the tray 23 is made of resin and is integrally molded, which makes it easy to manufacture the tray 23. Also, since the tray 23 is made of resin, the bolts 73 are likely to break the periphery of the bolt holes in the tray attachment portion 75d attached to the side member 15 to which a strong rear-end collision load is applied.

[0086] Furthermore, according to the embodiment described above, each of the fixing structures, the battery fixing structure 25 and the tray fixing structure 27, can mitigate the collision load during a rear-end collision input to the battery 3 installed between the rear of the vehicle's rear wheel house 9 and the front of the rear wall 11 of the vehicle body, and by adopting both fixing structures, the battery 3 can be protected even more effectively. [Industrial Applicability]

[0087] According to at least one embodiment of the present invention, the collision load input to the on-board equipment installed between the rear wheel house of the vehicle and the rear wall of the vehicle body behind can be mitigated during a rear collision to protect the on-board equipment, making it suitable for use in a fixing structure for on-board equipment. [Explanation of symbols]

[0088] 1. Vehicle equipment fixing structure 3. Battery (vehicle equipment) 5. Vehicles 7. Luggage compartment 9 Rear wheel house 11 Rear wall of the vehicle 13 Rear floor panel 15 Side member 23 Tray 25 Battery fixing structure 27 Tray fixing structure 29 Vehicle width direction fixing means 31 Vertical fixing means 33 Anteroposterior support means 35 Measures to control movement 39a, 39b, 39c, 39d Ribs 39aa, 39ca, 53a, 55a sloped surface 41 Bottom wall 43 Front wall 45 Rear wall 47 Exterior wall 47a 1st outer wall section 47b Second outer wall 47c 3rd outer wall 49 Tray bracket 49a Bottom part 49b Elevation 53 Vehicle outer engagement groove (outer vertical engagement portion) 55 Vehicle inner engaging groove (inner vertical engaging portion) 57 Bolt fastening section 59 Tray bracket anti-rotation part 61, 73 Volts 63 Pressing means 65 Turning section 67 Protrusion 68 Groove 75a, 75b, 75c, 75d Tray attachment parts 77 Battery bracket 79 First battery bracket 81 Second battery bracket 89 Brace members (reinforcement members) 91 Chamfer F Rear impact load G Corner S Gap

Claims

1. A fixing structure for an in-vehicle device that is installed between a rear wheel house of a vehicle and a rear wall of the vehicle body, a side member provided on a lower surface of a rear floor panel on an inner side of the rear wheel house, the side member extending in a front-rear direction of the vehicle; A tray for placing the in-vehicle device; a plurality of tray attachment portions provided on a bottom wall portion of the tray and through which bolts for attaching the tray to a vehicle body pass; A fixing structure for vehicle-mounted equipment, characterized in that among the multiple tray mounting portions, only the tray mounting portion that is located most inward in the vehicle width direction and most rearward in the vehicle fore-and-aft direction is attached to the side member, and the remaining multiple tray mounting portions are attached to the rear floor panel.

2. 2. The vehicle-mounted device fixing structure according to claim 1, further comprising a battery bracket provided between the rear floor surface and the tray mounting portion so that the tray mounting portion is positioned above the rear floor surface.

3. 3. The vehicle-mounted equipment fixing structure according to claim 2, wherein the battery bracket is divided into a first battery bracket to which the tray mounting portion located innermost in the vehicle width direction and rearmost in the vehicle front-rear direction is attached, and a second battery bracket to which the remaining multiple tray mounting portions are attached.

4. 4. The vehicle-mounted equipment fixing structure according to claim 3, wherein the first battery bracket has one end connected to the rear end of the side member via the rear floor panel and the other end connected to the rear wall of the vehicle body, and is provided on a reinforcing member that bridges between the side member and the rear wall of the vehicle body.

5. 5. The vehicle-mounted equipment fixing structure according to claim 1, wherein the bottom wall portion of the tray on which the vehicle-mounted equipment is placed has a substantially rectangular shape in a plan view, and a chamfer is formed on the corner portion on the vehicle inner side facing the rear wheel house.

6. 6. The vehicle-mounted equipment fixing structure according to claim 1, wherein the bottom wall portion of the tray on which the vehicle-mounted equipment is placed has a substantially rectangular shape in a plan view, and a rear wall portion is erected on one side of the tray facing the rear wall of the vehicle body.

7. 7. The structure for fixing an in-vehicle device according to claim 1, wherein the tray is made of resin and is integrally molded.

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