JP7190120B1 - Vehicle body side undercarriage - Google Patents

Abstract

An object of the present invention is to suppress deformation of a cab body side due to input of a load that moves the lower portion of the cab body side inward in the vehicle width direction. A side lower reinforcing member (32) includes a side fixing portion (36) fixed to a reinforcing member mounting portion (23) of a cab body side (2), a floor side fixing portion (37) fixed to a floor panel (3), and an elevating step (24). has step support portions 35 and 36 to which are fixed. The floor side fixing portion 37 of the side lower reinforcing member 32 overlaps the lower surface of the floor panel 3 from below in surface contact with the side fixing portion 36 and the step support portions 35 and 36 and inside in the vehicle width direction. Panel 3 is joined. [Selection drawing] Fig. 6

Description

The present disclosure relates to a vehicle bodyside undercarriage.

2. Description of the Related Art A vehicle cab structure is known in which a cab body side stands up along the vehicle front-rear direction outside a floor panel in the vehicle width direction. The vehicle width direction outer edge of the floor panel is fixed to the cab body side, and the floor panel and the cab body side define the vehicle interior below and in the vehicle width direction. The cab body side is provided with a door opening for passengers to enter and exit the vehicle, and a door that opens and closes the door opening is rotatably supported by a door support portion on the cab body side in front of the door opening. (For example, Patent Document 1).

JP 2017-39424 A

In the above-described conventional structure, when the door is moved further open than the opening limit or when a downward load is applied to the opened door, the load that moves the lower part of the cab body side inward in the vehicle width direction is supported by the door. Input to the cab body side through the part. Further, when the elevating step is fixed to the lower part of the body side, when the passenger's load is applied to the elevating step, the load inward in the vehicle width direction is input to the lower part of the cab body side. If the load input to the cab body side becomes excessive, the cab body side may be deformed.

Accordingly, an object of the present disclosure is to suppress deformation of the cab body side caused by the input of a load that moves the lower portion of the cab body side inward in the vehicle width direction.

In order to achieve the above object, in a first aspect of the present disclosure, a cab body side stands up along the vehicle front-rear direction on the vehicle width direction outer side of a floor panel of a vehicle, and the vehicle width direction outer end edge of the floor panel It is fixed to the cab body side, the floor panel and the cab body side define the lower part of the vehicle compartment and the vehicle width direction, and the cab body side has a door opening for passengers to get in and out of the vehicle compartment. A vehicle body side lower structure in which a door supporting portion for rotatably supporting an opening/closing door is provided on a cab body side, and includes a side lower plate portion, an elevating step, and a side lower reinforcing member.

The side lower plate portion has a step mounting portion and a reinforcement member mounting portion, and constitutes a lower portion of the cab body side. The elevating step has a step upper portion fixed to the step mounting portion of the side lower plate portion, and a tread plate portion disposed below the step upper portion. The side lower reinforcing member has a side fixed portion fixed to the reinforcing member mounted portion of the side lower plate portion, a floor side fixed portion fixed to the floor panel, and a step support portion to which the lifting step is fixed. . The floor-side fixing portion of the side lower reinforcing member is joined to the floor panel above and inside the side-side fixing portion and the step support portion in surface contact with the lower surface of the floor panel from below.

In the above configuration, when the door is moved further open than the opening limit or when a downward load is applied to the opened door, the lower portion of the cab body side (side lower plate portion) is moved inward in the vehicle width direction. The load is input to the door support on the side of the cab body. Also, when the load of the occupant is applied to the ascending/descending step, the load toward the inside in the vehicle width direction is input to the lower portion of the cab body side (side lower plate portion). The side fixing portion of the side lower reinforcing member is fixed to the reinforcing member attached portion of the side lower plate portion, the lifting step is fixed to the step supporting portion of the side lower reinforcing member, and the floor side fixing portion of the side lower reinforcing member is fixed. is fixed to the floor panel above and inward in the vehicle width direction of the side fixing portion and the step support portion, so that the load that moves the side lower plate portion inward in the vehicle width direction is transferred to the floor via the side lower reinforcing member. It can be distributed and supported on the panel. In addition, since the floor-side fixing portion of the lower side reinforcing member is joined to the floor panel while being in surface contact with the lower surface of the floor panel from below, the load input from the lower side reinforcing member to the floor panel is biased. can be distributed over a wide area without stress concentration.

Therefore, it is possible to suppress deformation of the cab body side caused by the input of a load that moves the lower portion of the cab body side inward in the vehicle width direction.

A second aspect of the present disclosure is the vehicle body side lower structure of the first aspect, wherein the floor side fixing portion of the side lower reinforcing member is in surface contact with the lower surface of the reinforcing member joint portion of the floor panel from below. It overlaps in a state and is joined to the reinforcing member joining portion. The lower surface of the reinforcement member joint portion of the floor panel is inclined downward toward the inside in the vehicle direction.

In the above configuration, since the lower surface of the reinforcing member joint portion of the floor panel is inclined downward toward the inside in the vehicle direction, the floor-side fixed portion of the lower side reinforcing member is moved from the outside in the vehicle width direction to the reinforcing member joint portion of the floor panel. When assembling to the lower surface of the , such assembling work can be easily performed.

According to the body side lower structure of the present disclosure, it is possible to suppress deformation of the cab body side caused by the input of a load that moves the lower part of the cab body side inward in the vehicle width direction.

1 is an exploded perspective view of a vehicle body side lower structure according to an embodiment of the present invention; FIG. FIG. 2 is a perspective view of the body side lower structure after assembly in FIG. 1 as viewed obliquely from the front and outside in the vehicle width direction; FIG. 3 is a front view of the body side lower structure of FIG. 2 as viewed from the front; FIG. 3 is a sectional view taken along line IV-IV of FIG. 2; FIG. 3 is a perspective view of the cab body side and the step of FIG. 2 as viewed obliquely from the front and outside in the vehicle width direction; FIG. 3 is a perspective view of the cab body side and the step of FIG. 2 as viewed obliquely forward from the inside in the vehicle width direction; FIG. 3 is a perspective view of the cab body side and the step of FIG. 2 as viewed obliquely rearward from the outside in the vehicle width direction;

An embodiment of the present invention will be described below with reference to the drawings. In the following description, the front-rear direction means the front-rear direction of the vehicle. In addition, the arrow FR in the figure indicates the front of the vehicle UP
indicates the upper side, and IN indicates the inner side in the vehicle width direction.

As shown in FIGS. 1 to 3, the cab of the vehicle according to the present embodiment includes left and right cab body sides 2 (the right side is not shown) that partition the vehicle interior 1 in the vehicle width direction, and a lower portion of the vehicle interior 1. and a floor panel 3 that partitions the The cab body side 2 stands up along the vehicle front-rear direction outside the floor panel 3 in the vehicle width direction, and the vehicle width direction outer edge of the floor panel 3 is fixed to the cab body side 2 . A front portion 3F of the floor panel 3 is slanted forward and upward. Although an example in which the body side lower structure of the present invention is applied to the left side of the cab will be described below, it can be applied to any one or both of the left and right sides.

The cab body side 2 has a body side inner panel 4 on the inner side in the vehicle width direction and a body side outer panel 5 on the outer side in the vehicle width direction. to form a closed cross-section. The cab body side 2 is provided with a front pillar 6 extending vertically at its front end, and a door opening 7 through which a passenger enters and exits the vehicle compartment 1 . The front side of the door opening 7 is defined by the front pillar 6 , and the front pillar 6 constitutes the portion of the cab body side 2 in front of the door opening 7 .

A door 8 for opening and closing a door opening 7 is rotatably supported on the front pillar 6 via a door hinge 9 . The door hinges 9 are provided at two upper and lower door support portions 10 on the outer surface (body side outer panel 5) of the front pillar 6 in the vehicle width direction. A rotation axis (not shown) of the door hinge 9 extends vertically, and the door opening 7 is opened and closed by tilting the door 8 about the rotation axis of the door hinge 9 . A door support portion 10 of the body side outer panel 5 is reinforced by a hinge reinforcing member 11 (see FIG. 4).

The body side inner panel 4 has a body side inner front lower portion (side lower plate portion) 21 arranged at the front lower portion of the cab body side 2, and the body side outer panel 5 extends at the body side inner front lower portion 21 in the vehicle width direction. It has a body side outer front lower part (side lower plate part) 22 facing from the outside. The lower edge portion of the body side inner front lower portion 21 and the lower edge portion of the body side outer front lower portion 22 are located below the vehicle width direction outer end portion (floor front outer end portion) 16 of the front portion 3F of the floor panel 3. They are overlapped in the vehicle width direction and joined to form a body side front lower edge portion 23 .

As shown in FIGS. 1 to 7, below the front lower portion of the cab body side 2, an elevating step 24 is attached to assist the passenger in getting on and off. The elevating step 24 is integrally formed with a closing 25 that covers the lower side of the cab body side 2 from the outside in the vehicle width direction, and a tread plate portion 26 that serves as a foothold for passengers getting in and out of the vehicle compartment 1 through the door opening 7 . Alternatively, the clothing 25 and the footboard portion 26 may be formed separately, and the footboard portion 26 may be attached to the clothing 25 .

The clothing 25 includes a front clothing plate portion 27 that intersects with the front-rear direction, a rear clothing plate portion 28 that faces the front clothing plate portion 27 with a gap therebetween, an inner edge of the front clothing plate portion 27 in the vehicle width direction, and the closing. It has a closing back plate portion 29 that closes the space between the rear plate portion 28 and the inner edge in the vehicle width direction. The tread plate portion 26 is supported by the lower edge portion of the front closing plate portion 27 , the lower edge portion of the rear closing plate portion 28 , and the lower edge portion of the back closing plate portion 29 .

An upper edge portion (closing upper edge portion) 30 of the closing 25 overlaps the body side front lower edge portion 23 from the outside in the vehicle width direction, and holds three bolts (the front bolt 12, the middle bolt 13, and the rear bolt 14) arranged in the front-rear direction. They are fastened and fixed to the front lower edge portion 23 of the body side by screwing and tightening the respective nuts 15 . That is, the body side front lower edge portion 23 constitutes the step mounting portion of the side lower plate portion, the closing upper edge portion 30 constitutes the step upper portion fixed to the step mounting portion, and the tread portion 26 is Located below the top of the step.

The rear side of the clothing 25 is supported by the cab body side 2 via the step rear support 31 , and the front side of the clothing 25 is supported by the cab body side 2 via the step front support (side lower reinforcing member) 32 .

As shown in FIGS. 6 and 7 , the post-step support 31 integrally has a rear support standing plate portion 33 and a body side rear connecting plate portion 34 . The rear support erecting plate portion 33 is erected so as to intersect the front-rear direction, and is fastened and fixed so as to overlap the rear surface of the rear closing plate portion 28 from the rear. The body side rear connecting plate portion 34 bends forward from the inner edge in the vehicle width direction of the upper portion of the rear support upright plate portion 33 , overlaps the rear portion of the front lower edge portion 23 in the vehicle width direction from the inner side in the vehicle width direction, and is connected to the rear bolt 14 . is fastened and fixed to the rear portion of the front lower edge portion 23 of the body side. That is, the rear portion of the closing upper edge portion 30 , the rear portion of the body side front lower edge portion 23 , and the body side rear connecting plate portion 34 overlap in the vehicle width direction, and are fastened and fixed together by the rear bolts 14 .

As shown in FIG. 6 , the front step support 32 integrally includes a front support erecting plate portion 35 , a body side front connecting plate portion 36 , and a floor connecting plate portion 37 . The front support standing plate portion 35 is arranged below the vehicle width direction outer end portion (floor front outer end portion) 16 of the front portion 3F of the floor panel 3, and stands up so as to intersect the front-rear direction. Reinforcing ribs 38 are integrally formed on the front support upright plate portion 35 to increase rigidity. The reinforcing rib 38 bulges forward from the front support erecting plate portion 35 and extends vertically, and the upper end of the reinforcing rib 38 continues to the floor connecting plate portion 37 .

The lower portion of the front support erecting plate portion 35 overlaps the front surface of the closing front plate portion 27 from the front and is fastened and fixed. The body side front connecting plate portion 36 bends forward from the outer edge in the vehicle width direction of the intermediate portion of the front support upright plate portion 35, overlaps the front portion of the front lower edge portion 23 in the vehicle width direction, and extends forward. It is fastened and fixed to the front portion of the body side front lower edge portion 23 by the bolt 12 . That is, the front portion of the closing upper edge portion 30, the front portion of the body side front lower edge portion 23, and the body side front connecting plate portion 36 overlap in the vehicle width direction, and are fastened and fixed together by the front bolt 12 (Fig. 4). The front portion of the body side front lower edge portion 23 constitutes the reinforcing member mounting portion of the side lower plate portion, and the body side front connecting plate portion 36 of the front step support 32 constitutes the reinforcing member mounting portion of the side lower plate portion. and a step support portion to which the elevating step 24 is fixed. Configure.

The front support erecting plate portion 35 extends upward from the body side front connecting plate portion 36 . The floor connecting plate portion 37 is bent obliquely forward and upward from the upper edge of the front support standing plate portion 35, and is overlapped with the lower surface of the floor front outer end portion 16 of the floor panel 3 by spot welding or the like while being in surface contact from below. spliced. That is, the floor front outer end portion 16 constitutes a reinforcing member joint portion of the floor panel 3, and the floor connecting plate portion 37 of the front step support 32 constitutes a floor side fixed portion fixed to the reinforcing member joint portion. The floor connecting plate portion 37 of the front step support 32 is located above and inside the front support standing plate portion 35, the body side front connecting plate portion 36, and the body side front lower edge portion 23 in the vehicle width direction of the floor front outer end portion 16. It is joined to the front outer end portion 16 of the floor while being in surface contact with the lower surface from below.

The floor front outer end portion 16 is inclined downward toward the inside in the vehicle direction, and correspondingly, the floor connecting plate portion 37 is also inclined downward toward the inside in the vehicle direction (see FIGS. 3 and 4).

In this embodiment, when the door 8 is moved further open than the opening limit (the opening limit of the door hinge 9) or when a downward load is applied to the opened door 8, the lower part of the cab body side 2 (body side A load that moves the front lower edge portion 23) inward in the vehicle width direction is input to the door support portion 10 of the cab body side 2 via the door hinge 9 . Further, when the load of the occupant is applied to the lifting step 24, the load toward the inside in the vehicle width direction is input to the lower portion of the cab body side 2 (body side front lower edge portion 23). A body side front connecting plate portion 36 of the front step support 32 is fixed to the body side front lower edge portion 23 of the cab body side 2, and the front support erecting plate portion 35 of the step front support 32 and the body side front connecting plate portion 36 are fixed. The floor connecting plate portion 37 of the front step support 32 is positioned above and inside the vehicle width direction of the front support erecting plate portion 35, the body side front connecting plate portion 36, and the body side front lower edge portion 23. Since it is fixed to the floor front outer end portion 16 of the floor panel 3, the load that moves the lower portion of the cab body side 2 (the body side front lower edge portion 23) inward in the vehicle width direction is applied to the front step support 32. It can be dispersedly supported on the floor panel 3 via the . Further, the floor connecting plate portion 37 of the front step support 32 overlaps the lower surface of the floor front outer end portion 16 of the floor panel 3 from below in surface contact and is joined to the floor front outer end portion 16. The load input from the front support 32 to the floor panel 3 can be distributed over a wide range without bias (stress concentration).

Therefore, deformation of the cab body side 2 due to the input of the load that moves the lower portion of the cab body side 2 inward in the vehicle width direction can be suppressed.

Further, since the lower surface of the floor front outer end portion 16 of the floor panel 3 is inclined downward toward the inside in the vehicle direction, the floor connecting plate portion 37 of the front step support 32 is moved from the vehicle width direction outside to the floor front outer end portion. When assembling to the lower surface of 16, such assembling work can be easily performed.

Further, since the floor connecting plate portion 37 is provided on the front support 32 that supports the lifting step 24, an increase in the number of parts can be suppressed.

Although the present invention has been described above based on the above embodiments, the present invention is not limited to the contents of the above embodiments, and can be appropriately modified without departing from the scope of the present invention. In other words, all other embodiments, examples, operation techniques, etc. made by those skilled in the art based on this embodiment are naturally included in the scope of the present invention.

For example, in the above embodiment, the front step support 32 functions as a lower side reinforcing member, but instead of or in addition to this, the rear step support 31 may function as a lower side reinforcing member, and the front step support 32 may function as a lower side reinforcing member. A side lower reinforcing member may be provided separately from the post-step support 31 .

In the above-described embodiment, the body side inner front lower portion 21 and the body side outer front lower portion 22 constitute the side lower plate portion. You may comprise a board part.

INDUSTRIAL APPLICABILITY The present invention can be widely applied to vehicles provided with elevating steps.

1: Vehicle interior 2: Cab body side 3: Floor panel 3F: Front part of floor panel 4: Body side inner panel 5: Body side outer panel 6: Front pillar 7: Door opening 8: Door 9: Door hinge 10: Door support 11: Hinge reinforcing member 12: Front bolt 13: Middle bolt 14: Rear bolt 15: Nut 16: Floor front outer end (reinforcing member joint)
21: Body side inner front lower part (side lower plate part)
22: Body side outer front lower part (side lower plate part)
23: Front lower edge of body side (part to which step is attached, part to which reinforcement member is attached)
24: Elevating step 25: Closing 26: Tread portion 27: Front closing plate portion 28: Rear closing plate portion 29: Back plate portion of closing 30: Upper edge of closing (upper portion of step)
31: Post-step support 32: Pre-step support (side lower reinforcing member)
33: Rear support upright plate portion 34: Body side rear connection plate portion 35: Front support upright plate portion (step support portion)
36: Body side front connecting plate part (side side fixed part, step support part)
37: Floor connection plate part (fixed part on the floor side)
38: Reinforcement rib

Claims (2)

A cab body side stands along the vehicle front-rear direction outside a floor panel of the vehicle in the vehicle width direction, and an outer edge portion of the floor panel in the vehicle width direction is fixed to the cab body side. A cab body side defines a lower part and a vehicle width direction of a vehicle compartment, a door opening for an occupant to enter and exit the vehicle compartment is provided in the cab body side, and a door for opening and closing the door opening is rotatably supported. A vehicle body side lower structure in which a door support portion is provided on the cab body side,
a side lower plate portion having a step attached portion and a reinforcing member attached portion and forming a lower portion of the cab body side;
a lifting step having a step upper portion fixed to the step mounting portion of the side lower plate portion, and a tread plate portion disposed below the step upper portion;
A side lower portion having a side fixing portion fixed to the reinforcing member mounted portion of the side lower plate portion, a floor side fixing portion fixed to the floor panel, and a step support portion to which the lifting step is fixed. a reinforcing member;
The floor-side fixing portion of the side lower reinforcing member overlaps the lower surface of the floor panel from below in surface contact with the side-side fixing portion and the step support portion and inward in the vehicle width direction. A body side substructure of a vehicle, characterized in that it is joined to a body side substructure of a vehicle. The body side understructure according to claim 1, comprising:
The floor-side fixing portion of the side lower reinforcing member is joined to the reinforcing member joint portion by overlapping the lower surface of the reinforcing member joint portion of the floor panel from below in a state of surface contact,
A lower body side structure for a vehicle, wherein a lower surface of the reinforcing member joining portion of the floor panel is inclined downward toward the inside in the vehicle direction.

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