CN114450214B

CN114450214B - Cab structure of vehicle

Info

Publication number: CN114450214B
Application number: CN202080067481.1A
Authority: CN
Inventors: 后藤辽
Original assignee: Isuzu Motors Ltd
Current assignee: Isuzu Motors Ltd
Priority date: 2019-09-27
Filing date: 2020-09-24
Publication date: 2023-06-27
Anticipated expiration: 2040-09-24
Also published as: JP7182081B2; JP2021054154A; WO2021060317A1; CN114450214A

Abstract

The passage bottom plate portion of the floor panel (10) is disposed below the floor rear portion, and extends rearward from the floor front portion between the left and right kick portions and between the left and right floor rear portions. A5 th passage bottom plate reinforcing member (61) is fixed to the lower surface of the passage bottom plate portion, and reinforces the passage bottom plate portion. The lower end of a passage side plate reinforcing member (62) that reinforces the passage side plate is fixed to a 5 th passage bottom plate reinforcing member (61). A floor rear reinforcing member (63) that connects the passage side plate reinforcing member (62) and the floor frame (33) is provided between the upper end of the passage side plate reinforcing member (62) and the floor frame (33). The seat is supported by the passage floor portion via a seat bracket (40). A lower end (40 b) of the seat support (40) is fixed to a region above the 5 th floor reinforcement member (61) in the floor portion.

Description

Cab structure of vehicle

Technical Field

The present disclosure relates to a cab structure of a vehicle.

Background

Patent document 1 describes an underfloor frame disposed in a lower portion of a cab of a flathead truck. The underfloor frame extends in the vehicle front-rear direction on both sides of the cab in the vehicle width direction. The underfloor frame includes: a front portion disposed substantially horizontally on a vehicle front side; a rising portion that is bent from a rear end of the front portion, is inclined upward in the vehicle, and extends obliquely upward in the vehicle; and a rear portion that is bent from an upper end of the rising portion and extends substantially horizontally rearward of the vehicle. The underfloor frame is fixed to the cab by welding or the like the abutting portion in a state of abutting against the lower surface of the floor panel of the cab. The seat surface portion of the seating seat is supported on the floor panel at the front and rear sides via the seat support member.

Prior art literature

Patent literature

Patent document 1: japanese patent application laid-open No. 2008-100658

Disclosure of Invention

Technical problem to be solved by the invention

In the vehicle described in patent document 1, an underfloor frame (underframe) has a front portion, a rising portion, and a rear portion, and is abutted against the lower surface of the floor panel. That is, the floor panel is provided with: a floor front supported by a front portion of the floor frame; a kick portion supported by the rising portion of the bottom chassis; and a floor rear portion supported by the rear portion of the chassis frame.

However, depending on the vehicle, there are cases where an occupant seated in a seating seat (seat) wants to stand up from the seat and move in the vehicle cabin further rearward than the seat. In this case, in the vehicle described in patent document 1, when the occupant moves further rearward than the seat, the occupant needs to move from the floor front portion to the upper floor rear portion across the kick-up portion, and thus the rearward movement may be complicated.

In a vehicle in which an occupant is restrained to a seat by a seat belt, when the occupant is about to move forward due to inertia, for example, at the time of a vehicle collision, a load is input from the seat to the floor panel via the seat support member, and therefore there is a possibility that the floor panel is greatly deformed upward and forward.

Accordingly, an object of the present disclosure is to provide a cab structure of a vehicle that can easily move further rearward than a seat, and that can ensure the strength of a floor panel with respect to a load input from the seat.

Technical means for solving the technical problems

In order to solve the above-described technical problem, a cab structure of a vehicle of a first aspect of the present disclosure includes a floor panel, left and right floor frames, a seat support member, and a floor reinforcement member. The floor panel has: a floor front extending rearward from a front end lower portion of the vehicle cabin; left and right kick portions extending upward from a rear portion of the floor front portion in a state of being separated from each other left and right; a left and right floor rear portion disposed further rearward and upward than the floor front portion, and extending rearward from an upper portion of the left and right kick portion in a state of being separated from each other left and right; a passage bottom plate portion disposed at a height lower than the left and right floor rear portions, and extending rearward from the rear portion of the floor front portion between the left and right kick portions and between the left and right floor rear portions; and right and left passage side plate portions rising along right and left end edge portions of the passage bottom plate portion, blocking the right and left kick-up portions and between the right and left floor rear portions and the passage bottom plate portion, the floor panel defining a lower portion of the vehicle cabin. The left and right floor frames are disposed on both sides in the vehicle width direction below the floor panel, extend from the front end side of the floor front portion to the rear end side of the left and right floor rear portions via left and right kick-up portions, extend along the lower surface of the floor panel, and are fixed to the floor panel. The seat has a seat cushion on which a passenger sits and is disposed above one of the right and left floor rear portions. The seat support member has: a lower end portion of the support member on the lower end side, which is fixed to the passage bottom plate portion of the floor panel; and an upper end portion of an upper end side support member fixed to the seat cushion, the seat support member standing from the passage floor portion and supporting the seat. The floor reinforcing member has: a passage floor reinforcing portion fixed to a lower surface of the passage floor portion of the floor panel; and a passage side plate reinforcing portion extending upward from the one end portion of the passage bottom plate reinforcing portion and fixed to the one surface of the one passage side plate portion, the upper end side of the passage side plate reinforcing portion being directly or indirectly connected to the one chassis frame. The support member lower end portion of the seat support member is fixed to a region above the passage floor reinforcing portion of the floor reinforcing member in the passage floor portion of the floor panel.

In the above-described structure, the passage bottom plate portion of the floor panel is disposed at a height lower than the left and right floor rear portions, and the seat is disposed above the left and right floor rear portions, extending rearward from the rear portion of the floor front portion, between the left and right kick portions and between the left and right floor rear portions. Therefore, when an occupant in the vehicle interior wants to stand up from the seat and move further rearward than the seat, the occupant can pass through the passage floor portion from the front of the floor and move rearward. That is, when the occupant stands up from the seat and moves further rearward than the seat, the occupant can move on the rear portion of the floor without crossing the kick-up portion from the front portion of the floor, and therefore can easily move further rearward than the seat.

The left and right floor frames are disposed on both sides in the vehicle width direction below the floor panel, and extend from the front end side of the floor front portion to the rear end side of the left and right floor rear portions via left and right kick-up portions along the lower surface of the floor panel, and are fixed to the floor panel.

Further, the floor reinforcing member has: a passage floor reinforcing portion fixed to a lower surface of the passage floor portion of the floor panel; and a passage side plate reinforcing portion that extends upward from the one end portion of the passage bottom plate reinforcing portion and is fixed to the one surface of the one passage side plate portion, whereby the passage bottom plate portion and the one passage side plate portion of the floor panel can be reinforced by the floor reinforcing member.

The passage side plate reinforcing portion of the floor reinforcing member extends upward from the one end portion of the passage bottom plate reinforcing portion, and the upper end side of the passage side plate reinforcing portion is directly or indirectly connected to the one side chassis frame. That is, the passage bottom plate reinforcement portion is connected to the one side chassis frame via the passage side plate reinforcement portion. The support member lower end portion of the seat support member is fixed to an area above the passage floor reinforcing portion of the floor reinforcing member in the passage floor portion of the floor panel. Accordingly, the load input from the seat to the floor panel can be transmitted from the passage bottom plate reinforcement portion of the floor reinforcement member to the one side floor frame via the passage side plate reinforcement portion, and therefore concentration of stress can be suppressed, and strength of the floor panel with respect to the load input from the seat can be ensured.

Therefore, the floor panel can be easily moved further rearward of the seat, and the strength of the floor panel with respect to the load input from the seat can be ensured.

A second aspect of the present disclosure is the cab structure of the vehicle of the first aspect, wherein the passage floor reinforcing portion of the floor reinforcing member extends in the vehicle width direction below the passage floor portion of the floor panel, and forms a closed cross section with the passage floor portion of the floor panel.

In the above-described structure, the passage floor reinforcing portion of the floor reinforcing member extends in the vehicle width direction below the passage floor portion of the floor panel, and forms a closed cross section with the passage floor portion of the floor panel. Therefore, the rigidity of the passage floor portion of the floor panel that passes when the occupant moves further rearward than the seat can be ensured by the passage floor reinforcement portion of the floor reinforcement member. Further, the strength of the floor panel against the load input from the seat can be ensured.

A third aspect of the present disclosure is the cab structure of the vehicle according to the first or second aspect, wherein the support member upper end portion and the support member lower end portion of the seat support member extend in the front-rear direction. The seat support member has a support member front end portion on a front end side extending in the up-down direction between a support member upper end portion and a support member lower end portion. The support member front end portion of the seat support member is disposed further rearward than the front end of the seat cushion.

In the above configuration, the support member front end portion of the seat support member is disposed further rearward than the front end of the seat cushion. Therefore, when the occupant moves the feet from the floor front to the passage floor portion in order to move the seat further rearward, the occupant's feet can be restrained from catching the support member front end portions of the seat support members.

A fourth aspect of the present disclosure is the cab structure of the vehicle according to any one of the first to third aspects, including a connecting member. The connecting member is disposed above the passage bottom plate portion of the floor panel, and connects the seat support member to the floor rear portion or the passage side plate portion.

In the above configuration, the connecting member is disposed above the passage bottom plate portion of the floor panel, and connects the one-side floor rear portion or the one-side passage side plate portion to the seat support member, so that the seat support member standing up from the passage bottom plate portion can be prevented from tilting to one side or the other side in the vehicle width direction by the connecting member.

Effects of the invention

According to the present disclosure, it is possible to easily move more rearward of the seat, and to ensure the strength of the floor panel against the load input from the seat.

Drawings

Fig. 1 is a side view of a cab of a vehicle according to an embodiment of the present disclosure.

Fig. 2 is a perspective view of the cab of fig. 1, as seen from the rear.

Fig. 3 is an exploded view of the cab.

Fig. 4 is a perspective view of a floor panel.

Fig. 5 is a top view of the floor panel.

Fig. 6 is a bottom view of the floor panel.

Fig. 7 is a perspective view of the seat bracket from the front.

Fig. 8 is a perspective view of the seat bracket from the rear.

Fig. 9 is a perspective view of the seat bracket corresponding to fig. 8 in a state in which the floor panel is omitted, as viewed from the rear.

Fig. 10 is a front view of the seat bracket.

Fig. 11 is a sectional view taken from XI-XI of fig. 8.

Fig. 12 is a top view of the front portion of the seat cushion.

Detailed Description

An embodiment of the present disclosure will be described below with reference to the accompanying drawings. IN each of the drawings, FR represents the vehicle front side, UP represents the upper side, and IN represents the vehicle width direction inner side. In the following description, the front-rear direction refers to the front-rear direction of the vehicle, and the left-right direction refers to the left-right direction in a state of being directed toward the front of the vehicle.

As shown in fig. 1, a vehicle 1 according to the present embodiment is an electric vehicle having a motor as a power source, and is a flat-head-type vehicle 1 in which a cab 2 is disposed above the power source. The cab 2 is mounted above the front portion of the body frame 3. Left and right front wheels 11 are disposed on left and right sides below the cab 2 (only the left front wheel 11 is shown in fig. 1). A rack (in the present embodiment, a cargo box 4) is mounted on the rear of the cab 2. An opening (not shown) through which a cargo compartment in the cargo box 4 can be accessed is formed in the front surface 4a of the cargo box 4. The power source of the vehicle 1 is not limited to the electric motor, and may be an engine.

As shown in fig. 2, an opening as an entrance 9 to the cabin 5 is formed in the rear surface 2a of the cabin 2. The access opening 9 of the rear surface 2a of the cab 2 communicates with the opening of the front surface 4a of the cargo box 4, and by this communication, direct movement from the vehicle cabin 5 to the cargo box 4 (or from the cargo box 4 to the vehicle cabin 5) is allowed.

As shown in fig. 1 to 3, the cab 2 is a cab 2 having a high roof panel 6 that expands a cabin 5 upward, and is formed in a box shape by joining a plurality of panels to each other, thereby defining the cabin 5 inside. The lower side of the vehicle cabin 5 is defined by a floor panel 10 described later. The front of the vehicle cabin 5 is defined by a front panel 49, and the front panel 49 stands up along the front end portion 10a of the floor panel 10 so as to intersect the front-rear direction. The side surfaces of the vehicle interior 5 are defined by left and right side panels 7 and side panel portions of the roof panel 6, and the left and right side panels 7 stand up along left and right side end portions 10b of the floor panel 10 so as to intersect the vehicle width direction. The rear of the vehicle interior 5 is defined by a rear panel 8 and a rear panel portion of the roof panel 6, and the rear panel 8 stands up along a rear end portion 10c of the floor panel 10 so as to intersect the front-rear direction. In the present embodiment, the doorway 9 of the rear face 2a of the cab 2 extends from the rear end portion 10c of the floor panel 10 to the roof panel 6 side above the back panel 8, and therefore the back panel 8 is constituted by two

back panels

8a, 8b divided into left and right by the doorway 9.

As shown in fig. 4 and 5, the floor panel 10 includes: a floor front 12 extending rearward from a front end lower portion of the vehicle cabin 5 (a front end portion 10a of the floor panel 10); left and right kick portions 13 disposed on left and right sides of the rear of the floor front 12, and extending rearward and upward from the rear of the floor front 12 (in the present embodiment, the rear end edge 19); a left and right floor rear portion 14 extending rearward from an upper portion (in the present embodiment, an upper end edge 20) of the left and right kick portion 13; a passage bottom plate portion 15 extending rearward from a central region of the rear portion of the floor front portion 12 in the vehicle width direction; and right and left passage side plate portions 16 standing up along right and left end edge portions 15a of the passage bottom plate portion 15.

The floor front 12 is disposed forward of the front wheels 11 (see fig. 1) of the vehicle 1, and extends over the entire left and right areas of the floor panel 10.

The left and right kick portions 13 are disposed above and forward of the left and right front wheels 11 (see fig. 1), are separated from each other left and right, and extend rearward and upward from rear end edges 19 on both left and right sides of the floor front portion 12.

The left and right floor rear portions 14 are disposed above the left and right front wheels 11 (see fig. 1), are separated from each other left and right, and extend rearward from the upper end edges 20 of the left and right kick-up portions 13. The left and right floor rear portions 14 are located at the rear and upper sides of the floor front portion 12 and are disposed at substantially the same height position as each other. A left and right support member 29 is fixed to rear end portions of the vehicle width direction outer end portions of the left and right floor rear portions 14, and the support member 29 supports rear lower end portions of the left and right side panels 7 connected to the floor panel 10. The left and right support members 29 are fixed to the left and right floor rear portions 14 in a state where they stand up along the vehicle width direction outer end portions of the left and right floor rear portions 14. Above the left and right floor rear portions 14, left and

right seats

17a, 17b (shown by two-

dot chain lines

17a, 17b in fig. 5) on which an occupant sits are respectively arranged.

The passage floor portion 15 forms a floor surface of a passage extending in the front-rear direction at the center in the vehicle width direction of the vehicle interior 5 (between the left and

right seats

17a, 17 b). The passage bottom plate portion 15 is disposed at a height position (in the present embodiment, a height position substantially equal to that of the floor front portion 12) lower than the right and left floor rear portions 14, and extends from a rear portion of the floor front portion 12 at the vehicle width direction center to the rear end portion 10c of the floor panel 10 through between the right and left kick portions 13 and between the right and left floor rear portions 14. The rear end edge portion 15b of the passage floor portion 15 defines a lower portion of the doorway 9 (see fig. 2) of the rear surface 2a of the cab 2. An inspection port 54 for performing a maintenance inspection of a device (for example, a power source or the like) located below the floor panel 10 is provided in a region of the passage floor portion 15 on the left side of the vehicle width direction center. The cover plate 55 for closing the inspection port 54 is attached to the passage bottom plate portion 15 in a state of being placed from above.

The left and right passage side plate portions 16 block the inner end edges of the left and right kick portions 13 and between the inner end edges of the left and right floor rear portions 14 and the left and right end edge portions 15a of the passage bottom plate portion 15. The left and right passage side plate portions 16 extend from the inner end edge sides of the left and right upper bent portions 13 in the raised state to the rear end portion 10c of the floor panel 10 in the rear. Rear end edges 16a of the left and right passage side plate portions 16 define both sides in the vehicle width direction of the lower end portion of the doorway 9 (see fig. 2) of the rear face 2a of the cab 2.

As shown in fig. 6, a pair of left and right floor frames 33 are fixed to the lower surface 10d of the floor panel 10, the lower surfaces of the floor front 12, the left and right kick-up portions 13, and the left and right floor rear portions 14. The left and right floor frames 33 are formed in a hat-shaped cross section that opens upward, extend in the front-rear direction along the lower surface 10d of the floor panel 10 from the front end 10a side to the rear end 10c of the floor panel 10, and define a closed cross section with the lower surface 10d of the floor panel 10. The left and right chassis frames 33 each have: a frame front 34 fixed to a lower surface of the floor front 12; a frame kick portion 35 that extends rearward and upward continuously from a rear end of the frame front portion 34 and is fixed to a rear surface of the kick portion 13; and a frame rear portion 36 that extends rearward continuously from the rear end of the frame kick portion 35 and is fixed to the lower surface of the floor rear portion 14. The left and right frame bent-up portions 35 and the left and right frame rear portions 36 are disposed further outward in the vehicle width direction than the passage bottom plate portion 15 and the left and right passage side plate portions 16. The left and right frame rear portions 36 are disposed at positions separated outward in the vehicle width direction from the inner edges 14a of the floor rear portion 14 in the vehicle width direction.

A floor front reinforcement 56 extending in the vehicle width direction between the left and right floor frames 33 is fixed to the lower surface of the rear end portion of the floor front 12 in the lower surface 10d of the floor panel 10. The floor front reinforcement 56 is formed in a hat-shaped cross section that opens upward, and a closed cross section that extends in the vehicle width direction is formed between the floor front reinforcement and the lower surface of the floor front 12, thereby reinforcing the floor front 12. The right and left ends of the floor front reinforcement 56 are fixed to the right and left floor frames 33.

A plurality of (in the present embodiment, five) passage floor reinforcing members 57 to 61 are fixed to the lower surface of the passage floor portion 15 in the lower surface 10d of the floor panel 10.

The 1 st passage floor reinforcement member 57 among the plurality of passage floor reinforcement members 57 to 61 is formed in a hat-shaped cross section that is open upward, extends in the vehicle width direction along the lower surface of the rear end portion 15b of the passage floor portion 15, and is fixed to the passage floor portion 15. The 1 st passage floor reinforcement member 57 extends over the entire area of the passage floor portion 15 in the vehicle width direction, and forms a closed cross section extending in the vehicle width direction with the lower surface of the passage floor portion 15, thereby reinforcing the passage floor portion 15. The 1 st passage floor reinforcing member 57 is disposed in the vicinity of the rear of the inspection port 54 of the passage floor portion 15. The 1 st passage bottom plate reinforcing member 57 has both right and left end portions protruding to both right and left sides of the passage bottom plate portion 15.

The 2 nd floor reinforcement member 58 of the plurality of floor reinforcement members 57 to 61 is formed in a hat-shaped cross section that is open upward, is disposed in the vicinity of the front of the inspection opening 54 of the floor portion 15, extends in the vehicle width direction along the lower surface of the floor portion 15, and is fixed to the floor portion 15. The 2 nd floor reinforcement member 58 extends over the entire area of the floor portion 15 in the vehicle width direction, and forms a closed cross section extending in the vehicle width direction with the lower surface of the floor portion 15, thereby reinforcing the floor portion 15.

The 3 rd passage floor reinforcing member 59 of the plurality of passage floor reinforcing members 57 to 61 is formed in a hat-shaped cross section opening upward, is disposed at a position spaced forward from the 2 nd passage floor reinforcing member 58 and spaced rearward from the floor front reinforcing member 56, extends in the vehicle width direction along the lower surface of the passage floor portion 15, and is fixed to the passage floor portion 15. The 3 rd passage floor reinforcing member 59 extends over the entire area of the passage floor portion 15 in the vehicle width direction, and forms a closed cross section extending in the vehicle width direction with the lower surface of the passage floor portion 15, thereby reinforcing the passage floor portion 15.

The 4 th passage bottom plate reinforcing member 60 among the plurality of passage bottom plate reinforcing members 57 to 61 is formed in a hat-shaped cross section that is open upward, is disposed near the right side of the inspection opening 54 of the passage bottom plate portion 15, extends in the front-rear direction along the lower surface of the passage bottom plate portion 15, and is fixed to the passage bottom plate portion 15. The 4 th passage floor reinforcing member 60 extends in the front-rear direction between the 1 st passage floor reinforcing member 57 and the 2 nd passage floor reinforcing member 58, and both front and rear ends are fixed to the 1 st passage floor reinforcing member 57 and the 2 nd passage floor reinforcing member 58. The 4 th passage bottom plate reinforcing member 60 forms a closed cross section extending in the front-rear direction with the lower surface of the passage bottom plate portion 15, and reinforces the passage bottom plate portion 15.

The 5 th floor reinforcement member (floor reinforcement member ) 61 among the plurality of floor reinforcement members 57 to 61 is formed in a hat-shaped cross section opening upward, is disposed on the right side of the 4 th floor reinforcement member 60, extends in the vehicle width direction along the lower surface of the floor portion 15, and is fixed to the floor portion 15. The 5 th floor reinforcement member 61 extends from the 4 th floor reinforcement member 60 to the outside in the vehicle width direction from the right end edge portion 15a of the floor portion 15, and forms a closed cross section extending in the vehicle width direction with the lower surface of the floor portion 15, thereby reinforcing the floor portion 15.

As shown in fig. 4, 8 and 9, the left and right passage side plate reinforcing members 24 that reinforce the rear end portions of the left and right passage side plate portions 16, the left and right inner reinforcing members 25 that reinforce the rear end portions of the left and right floor rear portions 14, and the left and right outer reinforcing members 26 are fixed to the rear end portion 10c of the floor panel 10 in addition to the 1 st passage bottom plate reinforcing member 57 that reinforces the passage bottom plate portion 15. The 1 st passage bottom plate reinforcing member 57, the left and right passage side plate reinforcing members 24, the left and right inner reinforcing members 25, and the left and right outer reinforcing members 26 reinforce substantially the entire area of the rear end portion 10c of the floor panel 10 in the vehicle width direction.

The left and right passage side plate reinforcing members 24 are reinforcing members that reinforce rear end portions of the left and right passage side plate portions 16 of the floor panel 10, are formed in a hat-shaped cross section that opens inward in the vehicle width direction, extend in the up-down direction along vehicle width direction outer side surfaces of the rear end portions of the left and right passage side plate portions 16, and are fixed to the vehicle width direction outer side surfaces of the left and right passage side plate portions 16. The left and right passage side plate reinforcing members 24 form a closed cross section extending in the up-down direction between the left and right passage side plate portions 16. The lower end portions of the left and right passage side plate reinforcing members 24 are fixed to both end portions of the 1 st passage bottom plate reinforcing member 57 in the vehicle width direction. In the present embodiment, the right and left passage side plate reinforcing members 24 are fixed with right and left connecting members 27 extending upward from the right and left passage side plate reinforcing members 24. The left and right connecting members 27 connect left and right back plate reinforcing members 28 (see fig. 3) fixed to the

back plates

8a and 8b of the cab 2 to the left and right passage side plate reinforcing members 24.

The left and right inner reinforcing members 25 are reinforcing members that reinforce rear end portions of the left and right floor rear portions 14 of the floor panel 10, are formed in a hat-shaped cross section that opens downward, extend in the vehicle width direction along upper surfaces of the rear end portions of the left and right floor rear portions 14, and are fixed to the upper surfaces of the left and right floor rear portions 14. The left and right inner reinforcement members 25 form a closed cross section extending in the vehicle width direction between the left and right inner reinforcement members and the upper surfaces of the left and right floor rear portions 14. The inner ends of the left and right inner reinforcement members 25 in the vehicle width direction are fixed to the upper ends of the left and right passage side plate reinforcement members 24. The vehicle width direction outer end portions of the left and right inner reinforcement members 25 are arranged at positions separated from the vehicle width direction inner side surfaces of the left and right support members 29 of the left and right floor rear portions 14.

The left and right outer reinforcing members 26 are reinforcing members that reinforce rear end portions of the left and right floor rear portions 14 of the floor panel 10, are formed in a hat-shaped cross section that opens downward, extend in the vehicle width direction along upper surfaces of the rear end portions of the left and right floor rear portions 14, and are fixed to the upper surfaces of the left and right floor rear portions 14. The left and right outer reinforcement members 26 form a closed cross section extending in the vehicle width direction between the left and right outer reinforcement members and the upper surfaces of the left and right floor rear portions 14. The left and right outer reinforcing members 26 are formed smaller than the left and right inner reinforcing members 25 so as to engage with the left and right inner reinforcing members 25 from below. The outer ends of the left and right outer reinforcement members 26 in the vehicle width direction are fixed to the inner surfaces of the left and right support members 29 of the left and right floor rear portions 14 in the vehicle width direction. The regions on the vehicle width direction inner end sides of the left and right outer reinforcement members 26 are covered with the left and right inner reinforcement members 25 from above, and are fixed while being engaged with the vehicle width direction outer end portions of the left and right inner reinforcement members 25 from below. That is, the left and right outer reinforcing members 26 and the left and right inner reinforcing members 25 reinforce substantially the entire area in the vehicle width direction of the rear end portions of the left and right floor rear portions 14 of the floor panel 10.

As shown in fig. 6 and 9, a lower end portion of a passage side plate reinforcing member (passage side plate reinforcing member, floor reinforcing member) 62 that reinforces the passage side plate portion 16 on the right side of the floor panel 10 is fixed to the outer end portion on the right side of the 5 th passage bottom plate reinforcing member 61. The passage-side-plate reinforcing member 62 is formed in a hat-shaped cross section that opens inward in the vehicle width direction, extends in the up-down direction along the vehicle-width-direction outer side surface of the right passage-side plate portion 16, and is fixed to the vehicle-width-direction outer side surface of the right passage-side plate portion 16. The passage side plate reinforcing member 62 has a closed cross section extending in the up-down direction between the passage side plate reinforcing member and the outer side surface of the right passage side plate portion 16 in the vehicle width direction. A floor rear reinforcement member 63 extending in the vehicle width direction is provided between the upper end portion of the passage side plate reinforcement member 62 and the frame rear portion 36 of the right side floor frame 33.

The floor rear reinforcement member 63 is formed in a hat-shaped cross section that opens downward, extends in the vehicle width direction between the upper end portion of the passage side plate reinforcement member 62 and the frame rear portion 36 of the right side floor frame 33, and is fixed to the right side floor rear portion 14. The vehicle width direction inner end portion of the floor rear reinforcement member 63 is fixed to the upper end portion of the passage side plate reinforcement member 62, and the vehicle width direction outer end portion of the floor rear reinforcement member 63 is fixed to the frame rear portion 36 of the right side floor frame 33. That is, the floor rear reinforcement member 63 connects the passage side plate reinforcement member 62 to the right side floor frame 33.

As shown in fig. 2 and 7, each of the left and

right seats

17a and 17b includes a seat cushion 37 on which the occupant sits, and a seat back 52 that stands up from the rear end portion of the seat cushion 37 and functions as the back of the occupant. In the present embodiment, the seat 17b on the driver's seat side (in the present embodiment, the right side (one side)) is supported by both the right floor rear portion 14 and the passage bottom plate portion 15, and the seat 17a on the assistant seat side (in the present embodiment, the left side) is supported by the left floor rear portion 14.

The right seat 17b (hereinafter, simply referred to as "seat 17 b") is supported on the right floor rear portion 14 and the passage bottom plate portion 15 so as to be slidable in the front-rear direction via left and right slide rails 38. The seat cushion 37 of the seat 17b has a protruding region 39 that protrudes inward in the vehicle width direction than the right passage side plate portion 16 and is disposed above the passage bottom plate portion 15. The protruding region 39 of the seat cushion 37 is supported by the passage floor portion 15 via a left slide rail 38 and a seat bracket (seat support member) 40 extending in the front-rear direction below the seat cushion 37. The vehicle width direction outer end portion of the seat cushion 37 is supported by the right floor rear portion 14 via a right side slide rail 38 (see fig. 12) extending in the front-rear direction below the seat cushion 37. A buckle 41 for fixing the seat belt is provided at the vehicle width direction inner end portion of the rear portion of the seat cushion 37.

As shown in fig. 7 to 9, the seat bracket 40 is disposed at a position spaced inward in the vehicle width direction from the right passage side plate portion 16, and stands up along the upper surface of the right outer end portion of the passage bottom plate portion 15 of the floor panel 10 in a state extending in the front-rear direction. The seat bracket 40 is formed in a frame shape by a panel-side fixing member 42, a seat-side fixing member 43, and front and

rear leg portions

44, 45, the panel-side fixing member 42 extending linearly in the front-rear direction along the upper surface of the passage floor portion 15 of the floor panel 10, the seat-side fixing member 43 being disposed at a position spaced upward from the panel-side fixing member 42, extending linearly in the front-rear direction below the left slide rail 38, and the front and

rear leg portions

44, 45 extending linearly in the up-down direction between the panel-side fixing member 42 and the seat-side fixing member 43. The panel-side fixing member 42 has a front-side fixing portion 46 fixed to the passage bottom plate portion 15 of the floor panel 10. The front side fixing portion 46 of the panel side fixing member 42 is located further rearward than the front side leg portion 44. The seat side fixing member 43 has front and

rear fixing portions

47 and 48 fixed to the left slide rail 38, and supports the slide rail 38 from below. That is, an upper end portion (support member upper end portion) 40a of the seat bracket 40 extends in the front-rear direction and is fixed to the seat 17 via the slide rail 38. The front-side fixing portion 47 of the seat-side fixing member 43 is located further forward than the front-side leg portion 44, and the rear-side fixing portion 48 is located further rearward than the rear-side leg portion 45. The front leg 44 is raised upward from the front end of the panel-side fixing member 42, and has an upper end joined to the seat-side fixing member 43 and a lower end joined to the panel-side fixing member 42. The rear leg 45 is erected rearward of the rear end portion of the panel-side fixing member 42, and has an upper end portion joined to the seat-side fixing member 43 and a lower end portion joined to the panel-side fixing member 42. A protruding portion 53 protruding rearward and extending along the upper surface of the passage bottom plate portion 15 is provided on the rear surface side of the lower end portion of the rear leg portion 45, and the rear end portion of the panel-side fixing member 42 is joined to the front surface side of the lower end portion of the rear leg portion 45. A rear fixing portion 50 fixed to the passage bottom plate portion 15 is provided at a protruding portion 53 of the lower end portion of the rear leg portion 45. That is, the lower end portion (support member lower end portion) 40b of the seat bracket 40 (in the present embodiment, the panel-side fixing member 42 and the protruding portion 53 of the rear leg portion 45) extend in the front-rear direction and are fixed to the passage floor portion 15. As shown in fig. 12, a front end portion (support member front end portion) 44a of the front leg portion 44 extending in the up-down direction between the upper end portion 40a and the lower end portion 40b of the seat bracket 40 is disposed further rearward than the upper end edge 20 of the kick portion 13 and further rearward than the front end 37a of the seat cushion 37 in the rearmost state.

As shown in fig. 8 to 10, the seat side fixing member 43 is supported from the right floor rear portion 14 side by front and rear bracket support members (coupling members) 51 extending in the vehicle width direction. The front and rear bracket support members 51 each have a vehicle width direction outer end 51a fixed to the right floor rear portion 14 and a vehicle width direction inner end 51b fixed to the seat side fixing member 43, extend substantially horizontally in the vehicle width direction along the upper surface of the right floor rear portion 14, and protrude inward in the vehicle width direction than the right passage side plate portion 16. The front-rear bracket support member 51 supports the seat side fixing member 43 to maintain the raised state of the seat bracket 40, and prevents the seat bracket 40 from tilting in the vehicle width direction.

As shown in fig. 9 and 11, the rear fixing portion 50 of the lower end portion 40b of the seat bracket 40 is fixed to a region 64 (region 64 above the 5 th floor reinforcement member 61) of the floor panel 10 that forms a closed cross section with the 5 th floor reinforcement member 61. In the present embodiment, a bolt insertion hole 67 is formed in the region 64 of the passage bottom plate portion 15. A bolt insertion hole 68 that communicates with the bolt insertion hole 67 of the passage floor portion 15 is formed in the rear side fixing portion 50 of the lower end portion 40b of the seat bracket 40. In the space 65 between the passage floor portion 15 of the floor panel 10 and the 5 th passage floor reinforcing member 61, a nut support member 66 having a cap-like cross section and opening downward is disposed, and is fixed to the 5 th passage floor reinforcing member 61. The nut support member 66 has an upper plate portion 66a that abuts against the lower surface of the passage bottom plate portion 15. A bolt insertion hole 70 communicating with the bolt insertion hole 67 of the passage bottom plate portion 15 is formed in the upper plate portion 66a of the nut support member 66, and a nut 69 is fixed to the lower surface of the upper plate portion 66a so as to communicate with the bolt insertion hole 70. The rear fixing portion 50 of the lower end portion 40b of the seat bracket 40 is fixed to the region 64 of the passage floor portion 15 by inserting the bolts 71 into the bolt insertion holes 68, 67, 70 from above and fastening them to the nuts 69. In addition, the front side fixing portion 46 is also fixed to a region of the passage floor portion 15 of the floor panel 10, which forms a closed cross section with the 2 nd passage floor reinforcing member 58, like the rear side fixing portion 50 of the lower end portion 40b of the seat bracket 40.

In the above configuration, the passage bottom plate portion 15 of the floor panel 10 is disposed at a height lower than the left and right floor rear portions 14, and extends from the floor front portion 12 to the doorway 9 of the rear surface 2a of the cab 2 through the space between the left and right kick-up portions 13 and the space between the left and right floor rear portions 14. Therefore, when an occupant seated in the

seats

17a, 17b wants to stand up from the

seats

17a, 17b and move to the rear side (for example, the doorway 9) than the

seats

17a, 17b, the occupant can pass through the passage floor portion 15 from the floor front 12 and move to the rear side of the

seats

17a, 17 b. In this way, when the occupant seated in the

seats

17a, 17b moves further rearward than the

seats

17a, 17b, the occupant can move further rearward than the

seats

17a, 17b without crossing the kick portion 13 from the floor front portion 12 and without moving on the floor rear portion 14.

Further, the left and right floor frames 33 extend from the front end side of the floor front 12 to the rear end side of the left and right floor rear 14 via the left and right kick-up portions 13 and are fixed to the lower surface 10d of the floor panel 10 along the lower surface 10d of the floor panel 10, so that the floor front 12, the left and right kick-up portions 13, and the left and right floor rear 14 of the floor panel 10 can be reinforced by the left and right floor frames 33.

Further, since a plurality of (in the present embodiment, five) passage floor reinforcing members 57 to 61 are fixed to the lower surface of the passage floor portion 15 of the floor panel 10, the passage floor portion 15 can be reinforced by the passage floor reinforcing members 57 to 61.

Further, the 1 st passage bottom plate reinforcing member 57, the left and right passage side plate reinforcing members 24, the left and right inner reinforcing members 25, and the left and right outer reinforcing members 26 are fixed to the rear end portion 10c of the floor panel 10, so that the rear end portion 10c of the floor panel 10 can be reinforced over the entire area in the vehicle width direction.

Further, since the passage side plate portion 16 on the right side of the floor panel 10 is fixed with the passage side plate reinforcing member 62, the passage side plate portion 16 on the right side can be reinforced by the passage side plate reinforcing member 62.

Further, since the floor rear portion 14 on the right side of the floor panel 10 is fixed with the floor rear portion reinforcement member 63 that connects the passage side plate reinforcement member 62 to the right side floor frame 33, the floor rear portion 14 on the right side can be reinforced by the floor rear portion reinforcement member 63.

Further, the rear fixing portion 50 of the lower end portion 40b of the seat bracket 40 is fixed to the region 64 forming a closed cross section with the 5 th floor reinforcing member 61 in the floor panel 10 of the passage floor portion 15, and the 5 th floor reinforcing member 61 is coupled to the right side floor frame 33 via the passage side plate reinforcing member 62 and the floor rear reinforcing member 63, so that the strength of the floor panel 10 against the load input from the seat 17b side can be ensured. For example, when an occupant restrained to the seat 17b by a seat belt or the like wants to move forward due to inertia at the time of collision of the vehicle 1 or the like, the buckle 41 is pulled forward and upward, and an upward load is input to the passage floor portion 15 of the floor panel 10 via the seat bracket 40. When an upward load is input from the seat 17b side to the tunnel floor portion 15 of the floor panel 10 via the seat bracket 40, the load is transmitted from the 5 th tunnel floor reinforcing member 61 to the right side floor frame 33 via the tunnel side plate reinforcing member 62 and the floor rear reinforcing member 63. In this way, the load input from the seat 17b side to the passage bottom plate portion 15 of the floor panel 10 can be transmitted to the right side floor frame 33, so that concentration of stress can be suppressed, and strength of the floor panel 10 against the load input from the seat 17b side can be ensured.

Therefore, according to the present embodiment, the floor panel 10 can be easily moved further rearward than the

seats

17a and 17b, and the strength of the floor panel 10 against the load input from the seat 17b can be ensured.

Further, the front end 44a of the front leg 44 of the seat bracket 40 is disposed further rearward than the front end 37a of the seat cushion 37 in the rearmost state. Therefore, when the occupant moves his or her feet from the floor front 12 in front of the

seats

17a, 17b to the passage floor 15 on the side of the

seats

17a, 17b in order to move rearward than the

seats

17a, 17b, the occupant's feet do not easily catch the front leg portions 44 of the seat brackets 40.

The front end 44a of the leg 44 on the front side of the seat bracket 40 is disposed further rearward than the upper end edge 20 of the kick portion 13. Therefore, when the occupant moves his or her feet from the floor front portion 12 in front of the kick portion 13 to the tunnel bottom plate portion 15 on the inner side in the vehicle width direction of the tunnel side plate portion 16 in order to move rearward than the

seats

17a, 17b, the occupant's feet are less likely to catch the front leg portions 44 of the seat brackets 40.

The front and rear bracket support members 51 each have a vehicle width direction outer end portion 51a fixed to the right floor rear portion 14 and a vehicle width direction inner end portion 51b fixed to the seat side fixing member 43, and support the seat side fixing member 43 to maintain the raised state of the seat bracket 40, so that the seat bracket 40 can be prevented from tilting in the vehicle width direction by the front and rear bracket support members 51.

Further, since the seat bracket 40 is disposed at a position separated inward in the vehicle width direction from the right side passage side plate portion 16, as shown in fig. 10, another device 72 (for example, an electric unit or the like) can be disposed between the seat bracket 40 and the right side passage side plate portion 16. The seat bracket 40 is formed in a frame shape by the panel-side fixing member 42, the seat-side fixing member 43, and the front and

rear leg portions

44 and 45, and therefore, the other device 72 can be disposed in the frame of the seat bracket 40.

In the present embodiment, the vehicle width direction outer end portions 51a of the front and rear bracket support members 51 that hold the raised state of the seat bracket 40 are fixed to the right floor rear portion 14, but the present invention is not limited thereto, and the vehicle width direction outer end portions 51a of the front and rear bracket support members 51 may be fixed to the right passage side plate portion 16. In the present embodiment, the vehicle width direction inner end portions 51b of the front and rear bracket support members 51 are fixed to the seat side fixing members 43 of the seat frame 40, but the present invention is not limited thereto, and the vehicle width direction inner end portions 51b of the front and rear bracket support members 51 may be fixed to other portions (for example, the front and

rear leg portions

44, 45, etc.) as long as the region of the seat frame 40 is above the passage floor portion 15 of the floor panel 10.

In the present embodiment, the front and rear bracket supporting members 51 that maintain the standing state of the seat bracket 40 are provided, but the number of the bracket supporting members 51 to be provided is not limited to two, and one or three or more bracket supporting members 51 may be provided. Alternatively, the bracket supporting member 51 may not be provided.

In the present embodiment, the seat 17b is mounted to the floor panel 10 so as to be slidable back and forth, but may be mounted so as not to be slidable. In this case, the front end 44a of the leg portion 44 on the front side of the seat bracket 40 may be disposed further rearward than the front end 37a of the seat cushion 37 in the state of being attached to the floor panel 10.

In the present embodiment, the plurality of passage floor reinforcing members 57 to 61 are formed in a hat-shaped cross section that is open upward, but the shape of the plurality of passage floor reinforcing members 57 to 61 is not limited to this, and may be any other shape (for example, a rectangular tube shape, etc.) as long as the shape of the passage floor portion 15 of the floor panel 10 can be reinforced.

In the present embodiment, the 1 st passage bottom plate reinforcing member 57, the left and right passage side plate reinforcing members 24, the left and right inner reinforcing members 25, and the left and right outer reinforcing members 26 are formed in a hat-shaped cross section, but the cross-sectional shape of each reinforcing member is not limited to this, and may be any shape (for example, a rectangular tube shape, etc.) as long as it can reinforce the rear end portion 10c of the floor panel 10.

In the present embodiment, the frame rear portions 36 of the left and right subframes 33 are arranged at positions separated from the inner edges 14a of the floor rear portion 14 in the vehicle width direction to the outside in the vehicle width direction, but the present invention is not limited thereto, and the frame rear portions 36 of the left and right subframes 33 may be arranged along the inner edges 14a of the floor rear portion 14 in the vehicle width direction. In this case, the upper end portion of the passage side plate reinforcing member 62 may be directly connected to the frame rear portion 36 of the right side floor frame 33 without the floor rear portion reinforcing member 63.

In the present embodiment, the seat bracket (seat support member) 40 is formed in a frame shape by the panel-side fixing member 42, the seat-side fixing member 43, and the front and

rear leg portions

44 and 45, but the shape of the seat bracket 40 is not limited to this, and may be any other shape as long as the seat 17b can be supported while standing up from the passage floor portion 15 of the floor panel 10. For example, the seat support member may be a rod-shaped seat support member that is raised from the passage bottom plate portion 15 of the floor panel 10, or may be a plate-shaped seat support member that is raised from the passage bottom plate portion 15 of the floor panel 10 and that intersects the vehicle width direction.

In the present embodiment, the seat holder 40 is provided below the right seat 17b, but the present invention is not limited thereto, and the seat holder 40 may be provided below the left seat 17a or below both the left and

right seats

17a and 17 b. Even in this case, the 5 th floor reinforcement member 61 below the seat bracket 40 is connected to the left floor frame 33 or to the left and right floor frames 33.

In the present embodiment, the 5 th passage bottom plate reinforcement member (passage bottom plate reinforcement portion, floor reinforcement member) 61 is fixed with the passage side plate reinforcement member (passage side plate reinforcement portion, floor reinforcement member) 62, and the upper end side of the passage side plate reinforcement member 62 is connected to the floor frame 33, but the present invention is not limited thereto. For example, instead of the 5 th passage bottom plate reinforcing member 61, the passage side plate reinforcing member 62 may be fixed to the 2 nd passage bottom plate reinforcing member 58, or the passage side plate reinforcing member 62 may be fixed to both the 5 th passage bottom plate reinforcing member 61 and the 2 nd passage bottom plate reinforcing member 58, and the upper end side of the passage side plate reinforcing member 62 may be connected to the floor frame 33. In this case, the 2 nd passage bottom plate reinforcing member 58 functions as a passage bottom plate reinforcing portion of the floor reinforcing member.

In the present embodiment, the floor front reinforcing member 56 is provided at the rear end portion of the floor front 12, but the floor front reinforcing member 56 may not be provided.

In the present embodiment, although five passage floor reinforcing members 57 to 61 are provided, at least the 5 th passage floor reinforcing member 61 may be provided.

In the present embodiment, the nut support member 66 is provided in the space 65 between the passage floor portion 15 and the 5 th passage floor reinforcing member 61 of the floor panel 10, and the lower end portion 40b of the seat bracket 40 is connected and fixed to the region 64 of the passage floor portion 15, but the method of fixing the lower end portion 40b of the seat bracket 40 to the passage floor portion 15 is not limited thereto, and may be fixed by various methods.

In the present embodiment, the high roof panel 6 that expands the cabin 5 upward is provided in the cab 2, but the present invention is not limited to this, and a roof panel of a normal height may be provided in the cab 2.

In the present embodiment, the doorway 9 is provided in the rear surface 2a of the cab 2, and the passage bottom plate portion 15 of the floor panel 10 is provided as a passage extending from the floor front 12 toward the doorway 9 (or extending from the doorway 9 toward the floor front 12). For example, instead of providing the doorway 9 in the rear surface 2a of the cab 2, the passage bottom plate portion 15 of the floor panel 10 may be a passage extending from the floor front 12 to a region rearward of the left and

right seats

17a, 17b (or extending from a region rearward of the left and

right seats

17a, 17b to the floor front 12).

The present disclosure has been described based on the above embodiments, but the present disclosure is not limited to the above embodiments, and can be appropriately modified without departing from the scope of the present disclosure. That is, other embodiments, examples, application techniques, etc. that are completed by those skilled in the art based on this embodiment are certainly within the scope of the present disclosure.

The present application is based on the Japanese patent application filed on 27 at 9.2019 (Japanese patent application No. 2019-177073), the contents of which are incorporated herein by reference.

Industrial applicability

The cab structure of the vehicle of the present disclosure can be widely applied to vehicles such as trucks.

Description of the reference numerals

1: vehicle with a vehicle body having a vehicle body support

2: cab

5: vehicle cabin

10: floor panel

12: front part of floor

13: left and right upper bent parts

14: rear parts of the left and right floors

15: via bottom plate part

16: left and right passage side plate portions

17b: chair seat

33: left and right chassis frame

37: seat cushion

40: armchair support (seat support part)

40a: upper end of seat support (upper end of support member)

40b: lower end of seat support (lower end of support part)

44: front leg

44a: front end of front leg (front end of support member)

51: bracket supporting part (connecting part)

61: 5 th passage bottom plate reinforcing member (passage bottom plate reinforcing portion, floor reinforcing member)

62: passageway side plate reinforcing member (passageway side plate reinforcing portion, floor reinforcing member)

Claims

1. A cab structure of a vehicle includes a floor panel, left and right chassis frames, a seat support member, and a floor reinforcement member,

the floor panel has: a floor front extending rearward from a front end lower portion of the vehicle cabin; left and right kick portions extending upward from a rear portion of the floor front portion in a state of being separated from each other left and right; a left and right floor rear portion disposed further rearward and upward than the floor front portion, and extending rearward from an upper portion of the left and right kick portion in a state of being separated from each other left and right; a passage bottom plate portion disposed at a height lower than the left and right floor rear portions, and extending rearward from the rear portions of the floor front portions between the left and right kick portions and between the left and right floor rear portions; and right and left passage side plate portions rising along right and left end edge portions of the passage bottom plate portion to block the right and left kick-up portions and between the right and left floor rear portions and the passage bottom plate portion, the floor panel defining a lower portion of the vehicle interior,

The left and right floor frames are disposed on both sides in the vehicle width direction below the floor panel, extend from the front end side of the floor front portion to the rear end side of the left and right floor rear portions via the left and right kick-up portions, extend along the lower surface of the floor panel, are fixed to the floor panel,

the seat has a seat cushion on which a passenger sits, is disposed above one of the right and left floor rear portions,

the seat support member has: a lower end portion of a lower end side support member fixed to the passage bottom plate portion of the floor panel; and an upper end portion of a support member fixed to the seat cushion, the seat support member rising from the passage floor portion and supporting the seat,

the floor reinforcing member has: a passage floor reinforcing portion fixed to a lower surface of the passage floor portion of the floor panel; and a passage side plate reinforcing portion extending upward from the one end portion of the passage bottom plate reinforcing portion and fixed to the one surface of the one passage side plate portion, an upper end side of the passage side plate reinforcing portion being directly or indirectly connected to the one chassis frame,

The support member lower end portion of the seat support member is fixed to an area above the passage floor reinforcing portion of the floor reinforcing member in the passage floor portion of the floor panel.

2. The cab structure of a vehicle according to claim 1, wherein,

the passage floor reinforcing portion of the floor reinforcing member extends in the vehicle width direction below the passage floor portion of the floor panel, and forms a closed cross section with the passage floor portion of the floor panel.

3. The cab structure of a vehicle according to claim 1 or 2, wherein,

the support member upper end portion of the seat support member and the support member lower end portion extend in the front-rear direction,

the seat support member has a support member front end portion on a front end side extending in a vertical direction between the support member upper end portion and the support member lower end portion,

the support member front end portion of the seat support member is disposed further rearward than the front end of the seat cushion.

4. The cab structure of a vehicle according to claim 1 or 2, wherein,

the seat support member is provided with a connecting member that is disposed above the passage bottom plate portion of the floor panel and connects the seat support member to the one-side floor rear portion or the one-side passage side plate portion.

5. The cab structure of a vehicle according to claim 3, wherein,