Frame vehicle

Abstract

To suppress the interference of a side rail with a battery pack on collision.SOLUTION: This invention relates to a frame vehicle 100, comprising a frame 10 including left and right side rails 11L, 11R, and a battery pack 40, where the battery pack 40 includes left and right battery frames 51L, 51R mounted on left and side faces 41L, 41R of the casing 41, left and right battery frames 51L, 51R being tightened with the left and right side rails 11L, 11R, left and right front end parts 53L, 53R or rear end parts 54L, 54R of the left and right battery frames 51L, 51R extending forward and rearward of the front end face 42 or rear end face 43 of the casing 41, and being tightened with the left and side rails 11L, 11R.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a structure of a frame vehicle on which a battery pack is mounted. [Background technology]

[0002] A frame vehicle in which a body is mounted on top of a frame is used. For example, Patent Document 1 discloses a frame vehicle in which a battery pack is mounted between left and right side rails that constitute a central frame portion located in the center of the vehicle in the longitudinal direction.

[0003] Furthermore, Patent Document 2 discloses a frame vehicle in which a battery pack is disposed in an underfloor space surrounded by a center side member, a first front cross member, and a second rear cross member. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2021-3940 [Patent Document 2] Patent Publication No. 2021-6435 Summary of the Invention [Problem to be solved by the invention]

[0005] In the frame used in a frame vehicle, the front frame to which the front suspension is attached and the rear frame to which the rear suspension is attached are narrower in the vehicle width direction than the central frame in the center on which the body is mounted. The central frame is connected to the front frame and the rear frame by a front kick portion and a rear kick portion that are curved in the vehicle width direction. For example, when the vehicle collides from the front, the front kick portion bends and deforms to absorb the impact force at the time of the collision. Similarly, when the vehicle collides from the rear, the rear kick portion bends and deforms to absorb the impact force.

[0006] However, in the case of a structure in which the battery pack is mounted between the left and right side rails that make up the central frame, such as the frame vehicle described in Patent Document 1, if the side rails are not rigid enough, when the vehicle collides, the side rails may deform before the kick section deforms, which could cause the side rails to interfere with the battery pack.

[0007] Therefore, an object of the present disclosure is to suppress interference of the side rail with the battery pack during a collision. [Means for solving the problem]

[0008] The frame vehicle of the present disclosure is a frame vehicle comprising a frame including left and right side rails extending in the fore-and-aft direction of the vehicle, and a battery pack arranged between the left and right side rails, wherein the battery pack includes a casing that houses a battery therein, and left and right battery frames attached to left and right side surfaces of the casing and extending in the fore-and-aft direction of the vehicle, the left and right battery frames being fastened to the left and right side rails, respectively, to fix the battery pack between the left and right side rails, and the front ends or rear ends of each of the battery frames extending forward or rearward beyond the front end face or rear end face of the casing and fastened to each of the side rails.

[0009] In this way, by fastening the front or rear end of the battery frame, which extends forward or rearward beyond the front or rear end of the battery pack casing, to the side rail, the rigidity of the side rail in the area where the battery pack is mounted can be increased. This makes it possible to suppress deformation of the side rail in the area where the battery pack is mounted during a collision, while deforming the kick parts connected to the front and rear ends of the side rail. This makes it possible to suppress interference of the side rail with the battery pack during a collision.

[0010] In the frame vehicle of the present disclosure, each of the front end portions or each of the rear end portions may be fastened to the surface of each of the side rails at the center of the vehicle width direction, and the center of each of the battery frames in the fore-and-aft direction of the vehicle may be fastened to the underside of each of the side rails.

[0011] This increases the bending rigidity in the vehicle width direction of the side rail in the area where the battery pack is mounted, making it possible to suppress deformation of the side rail in the vehicle width direction.

[0012] In the frame vehicle of the present disclosure, the frame includes left and right front kick portions connected to the front ends of each of the left and right side rails, curving toward the center in the vehicle width direction as it approaches the front of the vehicle and then curving toward the upper direction of the vehicle, and then extending toward the front of the vehicle, and left and right rear kick portions connected to the rear ends of each of the left and right side rails, curving toward the center in the vehicle width direction as it approaches the rear of the vehicle and then curving toward the upper direction of the vehicle, and then extending toward the fore-and-aft of the vehicle, and the battery pack may be fixed to the left and right side rails so that the front end surface or the rear end surface of the casing is positioned rearward or forward of the front kick portion or the rear kick portion.

[0013] As a result, when the front kick portion and the rear kick portion deform during a collision, the front kick portion and the rear kick portion abut against the front end or rear end of the battery frame, thereby preventing the front kick portion and the rear kick portion from interfering with the battery pack. Effect of the Invention

[0014] The present disclosure aims to suppress interference of a side rail with a battery pack during a collision. [Brief description of the drawings]

[0015] [Figure 1] FIG. 2 is a bottom view of the frame and the battery pack of the frame vehicle according to the embodiment. [Diagram 2] FIG. 2 is a left side view of the frame and the battery pack of the frame vehicle according to the embodiment. [Diagram 3]2 is a cross-sectional view taken along line AA in FIG. 1. [Figure 4] FIG. 2 is a cross-sectional view of BB shown in FIG. [Diagram 5] FIG. 2 is a cross-sectional view of the CC shown in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] Hereinafter, the frame vehicle 100 of the embodiment will be described with reference to the drawings. The arrows FR, UP, and LH shown in each drawing indicate the front, upper, and left sides of the frame vehicle 100, respectively. The opposite directions of the arrows FR, UP, and LH indicate the rear, lower, and right sides. Hereinafter, when the directions of front-rear, left-right, and up-down are used in the description, they refer to the front-rear direction of the frame vehicle 100, the left-right direction of the left-right direction, and the up-down direction of the up-down direction, unless otherwise specified.

[0017] As shown in Figs. 1 and 2, the frame vehicle 100 includes a frame 10 and a battery pack 40. The frame 10 is a structure on which a body (not shown) is mounted. The frame 10 also mounts a driving device (not shown) such as an engine and a motor, and also has front and rear wheel suspension devices (not shown) attached thereto. The battery pack 40 is a package that houses a battery that supplies driving power to a driving motor (not shown) mounted on the frame vehicle 100. Note that Fig. 2 is a left side view of the frame 10 and the battery pack 40, in which the left side rail 11L has been cut away to show the battery pack 40 arranged at the center of the left side rail 11L in the vehicle width direction.

[0018] The frame 10 is made up of left and right side rails 11L, 11R, a front frame 20, a rear frame 30, left and right front kick portions 12L, 12R, and left and right rear kick portions 13L, 13R.

[0019] The left and right side rails 11L, 11R are skeletal members extending in the vehicle longitudinal direction at the center of the vehicle longitudinal direction. As shown in Figures 3 to 5, the left and right side rails 11L, 11R may be formed of longitudinal members with a rectangular closed cross section. Body mounts (not shown) are attached to the front and rear of the left and right side rails 11L, 11R. The body is mounted on the body mounts.

[0020] The front frame 20 is disposed at the front of the frame vehicle 100 and is a structure to which a front suspension (not shown) is attached. The front frame 20 includes left and right front side members 21L, 21R, first, second and third cross members 22, 23 and 24, and left and right crash boxes 25L, 25R.

[0021] The left and right front side members 21L, 21R are framework members extending in the vehicle front-rear direction, and may be formed of longitudinal members with a rectangular closed cross section, for example. The distance between the left and right front side members 21L, 21R in the vehicle width direction is narrower than the distance between the left and right side rails 11L, 11R in the vehicle width direction. In addition, as shown in FIG. 2, the left and right front side members 21L, 21R are disposed at a higher position than the left and right side rails 11L, 11R.

[0022] The first, second and third cross members 22, 23 and 24 are framework members that respectively connect the left and right front side members 21L, 21R in the vehicle width direction at the front, center and rear of the front frame 20. The first, second and third cross members 22, 23 and 24 may be configured as longitudinal members with, for example, a hat-shaped cross section or a rectangular closed cross section.

[0023] The left and right crash boxes 25L, 25R are attached to the front portions of the left and right front side members 21L, 21R. When the frame vehicle 100 crashes head-on, the left and right crash boxes 25L, 25R collapse in the front-rear direction of the vehicle to absorb the impact force.

[0024] The rear frame 30 is disposed at the rear of the frame vehicle 100 and is a structure to which a rear suspension (not shown) is attached. The rear frame 30 includes left and right rear side members 31L, 31R, fourth, fifth and sixth cross members 32, 33 and 34, and left and right crash boxes 35L, 35R.

[0025] The left and right rear side members 31L, 31R are frame members extending in the vehicle front-rear direction, and may be formed of, for example, rectangular longitudinal members with closed cross sections. As with the left and right front side members 21L, 21R, the distance between the left and right rear side members 31L, 31R in the vehicle width direction is narrower than the distance between the left and right side rails 11L, 11R in the vehicle width direction. Similarly, the left and right rear side members 31L, 31R are disposed at a higher position than the left and right side rails 11L, 11R.

[0026] The third, fourth and fifth cross members 32, 33 and 34 are framework members that respectively connect the left and right front side members 21L, 21R in the vehicle width direction at the front, center and rear of the rear frame 30. The fourth, fifth and sixth cross members 32, 33 and 34 may be configured as longitudinal members with, for example, a hat-shaped cross section or a rectangular closed cross section.

[0027] The left and right crash boxes 35L, 35R are attached to the rear of the rear side members 31L, 31R, and are crushed in the longitudinal direction of the vehicle in the event of a rear-end collision of the frame vehicle 100 to absorb the impact force.

[0028] The left and right front kick parts 12L, 12R are framework members that connect the front ends 11Lf, 11Rf of the left and right side rails 11L, 11R to the rear ends 21Lr, 21Rr of the left and right front side members 21L, 21R. The left and right front kick parts 12L, 12R may be made of rectangular closed cross-section members, like the left and right side rails 11L, 11R and the left and right front side members 21L, 21R. As described above, the distance between the left and right front side members 21L, 21R in the vehicle width direction is narrower than the distance between the left and right side rails 11L, 11R in the vehicle width direction, and the left and right front side members 21L, 21R are disposed at a higher position than the left and right side rails 11L, 11R. The left and right front kick portions 12L, 12R curve toward the center in the vehicle width direction as they move toward the front of the vehicle from their rear ends 12Lr, 12Rr connected to the front ends 11Lf, 11Rf of the left and right side rails 11L, 11R, and then curve toward the upper part of the vehicle, and then extend toward the front of the vehicle, with the front ends 12Lf, 12Rf connected to the rear ends 21Lr, 21Rr of the left and right front side members 21L, 21R.

[0029] Similarly, the left and right rear kick portions 13L, 13R are framework members that connect the rear ends 11Lr, 11Rr of the left and right side rails 11L, 11R to the front ends 31Lf, 31Rf of the left and right rear side members 31L, 31R. The left and right rear kick portions 13L, 13R curve toward the center in the vehicle width direction and toward the upper direction of the vehicle as they move toward the rear of the vehicle from the front ends 13Lf, 13Rf connected to the rear ends 11Lr, 11Rr of the left and right side rails 11L, 11R, and then extend toward the rear of the vehicle, with the rear ends 13Lr, 13Rr connected to the front ends 31Lf, 31Rf of the left and right rear side members 31L, 31R.

[0030] When the frame vehicle 100 collides forward, the left and right front kick portions 12L, 12R bend and deform toward the center in the vehicle width direction in a plan view, and bend and deform toward the upper side of the vehicle in a side view. This allows the left and right front kick portions 12L, 12R to absorb the impact force when the frame vehicle 100 collides forward. Similarly, when the frame vehicle 100 collides backward, the left and right rear kick portions 13L, 13R bend and deform in the same manner as the left and right front kick portions 12L, 12R, and absorb the impact force when the frame vehicle 100 collides backward.

[0031] The battery pack 40 includes a battery (not shown) that supplies driving power to a driving motor (not shown) mounted on the frame vehicle 100, and a casing 41 that houses the battery. The battery pack 40 is disposed between the left and right side rails 11L, 11R.

[0032] As shown in Figs. 1 to 3, the casing 41 has a thin rectangular parallelepiped shape surrounded by left and right side surfaces 41L, 41R, a front end surface 42, a rear end surface 43, a ceiling surface 44, and a bottom plate 45. The height of the casing 41 is approximately the same as the height of the left and right side rails 11L, 11R. The length of the casing 41 in the vehicle width direction is approximately the same as the inner dimensions of the left and right side rails 11L, 11R in the vehicle width direction. The length of the casing 41 in the vehicle front-rear direction is slightly shorter than the length of the left and right side rails 11L, 11R in the vehicle front-rear direction.

[0033] As shown in Figs. 3 to 5, a left battery frame 51L extending in the vehicle front-rear direction is attached to the left side surface 41L. The left battery frame 51L is a rectangular closed cross-section member. The lower surface of the left battery frame 51L is connected to the upper surface of the bottom plate 45. A right battery frame 51R is also attached to the right side surface 41R, similar to the left side surface 41L. As shown in Figs. 1 and 2, the left and right front end portions 53L, 53R of the left and right battery frames 51L, 51R extend forward of the vehicle by a length d1 beyond the front end surface 42 of the casing 41. In addition, the left and right rear end portions 54L, 54R of the left and right battery frames 51L, 51R extend rearward of the vehicle by a length d2 beyond the rear end surface 43 of the casing 41.

[0034] As shown in Figures 1 to 3, left and right flanges 52L, 52R that connect the left and right battery frames 51L, 51R to the left and right side rails 11L, 11R are attached to the center of the left and right battery frames 51L, 51R in the vehicle front-rear direction. As shown in Figure 3, the left flange 52L is an L-shaped bent plate member that is attached to the outer surface of the left battery frame 51L in the vehicle width direction. The left flange 52L is fastened to the underside of the left side rail 11L by multiple bolts 55. The right battery frame 51R has a right flange 52R attached thereto, similar to the left battery frame 51L, and the right flange 52R is fastened to the underside of the right side rail 11R by multiple bolts 55, similar to the left flange 52L.

[0035] As shown in Figs. 1, 2 and 4, a left front bracket 14L is attached to the surface of the front end 11Lf of the left side rail 11L on the vehicle width direction center side. A bush 15L through which a bolt 56 passes is fixed to the lower part of the left front bracket 14L. A hole (not shown) through which the bolt 56 passes is provided on the lower surface of the left front end portion 53L of the left battery frame 51L. The left front end portion 53L of the left battery frame 51L is fastened to the bush 15L of the left front bracket 14L by the bolt 56 and nut 57 inserted from below into the hole. A right front bracket 14R of a similar structure is provided at the front end 11Rf of the right side rail 11R. The right front end portion 53R of the right battery frame 51R is fastened to the bush 15R of the right front bracket 14R by the bolt 56 and nut 57.

[0036] As shown in Figures 1, 2 and 5, a left rear bracket 16L is attached to the surface of the rear end 11Lr of the left side rail 11L on the vehicle width direction center side. A bush 17L through which a bolt 56 passes is fixed to the lower part of the left rear bracket 16L. Similar to the left front end 53L of the left battery frame 51L, the left rear end 54L of the left battery frame 51L is fastened to the bush 17L of the left rear bracket 16L by a bolt 56 and a nut 57. A right rear bracket 16R of a similar structure is also provided at the rear end 11Rr of the right side rail 11R. The right rear end 54R of the right battery frame 51R is fastened to the bush 17R of the right rear bracket 16R by a bolt 56 and a nut 57.

[0037] As described above, the left and right front end portions 53L, 53R and the left and right rear end portions 54L, 54R of the left and right battery frames 51L, 51R extend further forward or rearward than the front end face 42 and the rear end face 43 of the casing 41. The centers of the left and right battery frames 51L, 51R are fixed to the centers of the left and right side rails 11L, 11R by the left and right flanges 52L, 52R. Furthermore, the left and right front end portions 53L, 53R and the left and right rear end portions 54L, 54R of the left and right battery frames 51L, 51R are fixed to the left and right front ends 11Lf, 11Rf and the left and right rear ends 11Lr, 11Rr of the left and right side rails 11L, 11R via the left and right front brackets 14L, 14R and the left and right rear brackets 16L, 16R.

[0038] This configuration increases the rigidity of the left and right side rails 11L, 11R in the area where the battery pack 40 is mounted. This makes it possible to deform the left and right front kick portions 12L, 12R and the left and right rear kick portions 13L, 13R while suppressing deformation of the left and right side rails 11L, 11R during a collision. This makes it possible to suppress deformation of the left and right side rails 11L, 11R and interference with the battery pack 40 during a collision.

[0039] As a result, when the left and right front kick portions 12L, 12R and the left and right rear kick portions 13L, 13R are deformed, they come into contact with the left and right front end portions 53L, 53R or the left and right rear end portions 54L, 54R of the left and right battery frames 51L, 51R. This makes it possible to prevent the left and right front kick portions 12L, 12R and the left and right rear kick portions 13L, 13R from interfering with the battery pack 40 during a collision.

[0040] In the above description, the battery frames 51L, 51R and the left and right rear end portions 54L, 54R extend forward or rearward of the vehicle beyond the front end face 42 and rear end face 43 of the casing 41, but this is not limited to the above.

[0041] For example, only the left and right front end portions 53L, 53R may be configured to extend further forward of the vehicle than the front end surface 42. Conversely, only the left and right rear end portions 54L, 54R may be configured to extend further rearward of the vehicle than the rear end surface 43. [Explanation of symbols]

[0042] 10 frame, 11L, 11R side rail, 11Lf, 11Rf, 31Lf, 31Rf front end, 11Lr, 11Rr, 21Lr, 21Rr rear end, 12L, 12R front kick part, 12Lf, 12Rf, 13Lf, 13Rf, 53L, 53R front end, 12Lr, 12Rr, 13Lr, 13Rr, 54L, 54R rear end, 13L, 13R rear kick part, 14L, 14R front bracket, 15L, 15R, 17L, 17R bush, 16L, 16R rear bracket, 20 front frame, 21L, 21R front side member, 22, 23, 24, 32, 33, 34 cross member, 25L, 25R crash box, 30 Rear frame, 31L, 31R rear side member, 35L, 35R crash box, 40 battery pack, 41 casing, 41L, 41R side, 42 front end surface, 43 rear end surface, 44 ceiling surface, 45 bottom plate, 51L, 51R battery frame, 52L, 52R flange, 55, 56 bolt, 57 nut, 100 frame vehicle.

Claims

1. A frame including left and right side rails extending in a front-rear direction of the vehicle; A frame vehicle comprising: a battery pack disposed between the left and right side rails; The battery pack includes a casing that houses a battery therein, and left and right battery frames that are attached to left and right side surfaces of the casing and extend in a front-rear direction of the vehicle, the left and right battery frames are fastened to the left and right side rails, respectively, to fix the battery pack between the left and right side rails; a front end portion or a rear end portion of each of the battery frames extends forward or rearward beyond a front end surface or a rear end surface of the casing, and is fastened to each of the side rails; A frame vehicle characterized by:

2. 2. The frame vehicle according to claim 1, Each of the front end portions or each of the rear end portions is fastened to a surface of each of the side rails on a center side in a vehicle width direction, a vehicle front-rear direction center portion of each of the battery frames is fastened to a lower surface of each of the side rails; A frame vehicle characterized by:

3. A frame vehicle according to claim 1 or 2, The frame is left and right front kick portions connected to front ends of the left and right side rails, curving toward the center in the vehicle width direction as they move toward the front of the vehicle and curving toward an upper direction of the vehicle, and then extending toward the front of the vehicle; left and right rear kick portions connected to rear ends of the left and right side rails, curving toward the center in the vehicle width direction as they approach the rear of the vehicle and curving toward an upper direction of the vehicle, and then extending toward the front and rear of the vehicle, the battery pack is fixed to the left and right side rails such that the front end surface or the rear end surface of the casing is located rearward or forward of the front kick portion or the rear kick portion; A frame vehicle characterized by:

Images