WO2021060447A1

WO2021060447A1 - Step bracket and step attachment structure for vehicle

Info

Publication number: WO2021060447A1
Application number: PCT/JP2020/036207
Authority: WO
Inventors: 健太郎佐々木; 伸彦金光
Original assignee: いすゞ自動車株式会社
Priority date: 2019-09-27
Filing date: 2020-09-25
Publication date: 2021-04-01
Also published as: CN114514144B; JP2021054161A; JP7281103B2; CN114514144A

Abstract

A step bracket 22 comprises a bracket main body 24 and a stopper section 25. The bracket main body 24 has a fixed part 28 fixed to a bracket support part 8 outward in a vehicle width direction from a side member 4 and farther upward toward a body 3 than the lower end of the side member 4, and a step support part 29 that supports a side step 20 below and outward in the vehicle width direction from the bracket support part 8 in a bracket-attached state in which the fixed part 28 has been fixed to the bracket support part 8. The stopper section 25 protrudes inward in the vehicle width direction from the bracket main body 24 to a point farther inward in the vehicle width direction than the bracket support part 8, and faces a vehicle-width-direction outer surface 9 of the side member 4 from the outer side in the vehicle width direction.

Description

Vehicle step bracket and step mounting structure

This disclosure relates to a vehicle step bracket and a step mounting structure.

In Patent Document 1, a side sill extending in the front-rear direction is arranged below the side portion of the vehicle body, a side edge portion of a floor panel constituting the floor surface portion of the vehicle body is joined to the side sill, and a side step is arranged near the outer portion of the side sill. The structure is described. An extension portion bent downward is formed at the end of the side edge portion of the floor panel, and a convex portion protruding inward of the vehicle is integrally formed at the extension portion. The side step is composed of a step main body and an arm member, one end of the arm member is fixed to the step main body, and the other end of the arm member is fixed to the convex portion of the floor panel.

Japanese Patent Application Laid-Open No. 5-155359

In the structure of Patent Document 1, since a convex portion is formed at the extension portion of the side edge portion of the floor panel and joined to the side sill, the strength and rigidity around the joint portion between the side edge portion of the floor panel and the side sill are improved. To do. Then, since the arm member of the side step is attached to the convex portion, the attachment strength of the side step is improved.

However, when the side step is pressed from the outside in the vehicle width direction due to a side collision of the vehicle (collision from the vehicle width direction), the movement of the side step inward in the vehicle width direction only increases the mounting strength of the side step. It cannot be regulated, and it is necessary to increase the rigidity of the arm member (step bracket) that supports the step body.

Therefore, the purpose of the present disclosure is to suppress the inward movement of the side step in the vehicle width direction at the time of a side collision of the vehicle while suppressing the rigidity of the step bracket to be low.

In order to achieve the above object, the first aspect of the present disclosure is to provide a side step to the outside of the side member in the vehicle width direction in a framed vehicle in which the body is elastically supported by a vehicle body frame having a side member extending in the vehicle front-rear direction. It is a step bracket for mounting, and includes a bracket body and a stopper portion.

The bracket body is a bracket with a fixed part fixed to the bracket support part on the body side on the outside in the vehicle width direction of the side member and above the lower end of the side member, and a bracket mounted state where the fixed part is fixed to the bracket support part. It has a step support portion that supports the side step at the lower outside of the support portion in the vehicle width direction. The stopper portion projects from the bracket body to the inside in the vehicle width direction from the bracket support portion to the inside in the vehicle width direction, and faces the outer surface of the side member in the vehicle width direction from the outside in the vehicle width direction.

In the above configuration, when the side step is pressed from the outside in the vehicle width direction and moves inward in the vehicle width direction due to a side collision of the vehicle (collision from the vehicle width direction), the stopper portion of the step bracket is outside the vehicle width direction of the side member. It abuts on the side surface from the outside in the vehicle width direction. As a result, the load in the vehicle width direction at the time of a side collision can be transmitted to the side members at an early stage (at the initial stage of the side collision), and the rigidity of the step bracket is kept low while the side step is inward in the vehicle width direction. The movement of the car can be suppressed.

The second aspect of the present disclosure is the step bracket of the first aspect, in which the stopper portion projects inward in the vehicle width direction from a predetermined vertical range continuous from the fixed portion to the step support portion. The upper end of the stopper portion is located below the upper end of the side member, and the lower end of the stopper portion is located above the lower end of the side member.

In the above configuration, the stopper portion projects inward in the vehicle width direction from a predetermined vertical range continuous from the fixed portion to the step support portion, the upper end of the stopper portion is located below the upper end of the side member, and the lower end of the stopper portion. Is located above the lower end of the side member, so even if the step bracket is displaced vertically with respect to the vehicle body frame during a side collision of the vehicle, the side member will move the stopper part that moves inward in the vehicle width direction. You can definitely take it.

Further, since the stopper portion and the side member can be brought into contact with each other in a wide range (area), the concentration of the load (stress) input to the side member can be relaxed and the deformation of the side member can be suppressed.

A third aspect of the present disclosure is a step mounting structure for mounting a side step on the outside in the vehicle width direction of a side member in a framed vehicle in which the body is elastically supported by a vehicle body frame having a side member extending in the vehicle front-rear direction. It has a step bracket and a stopper.

The step bracket is a bracket with a fixed part fixed to the bracket support part on the body side on the outside in the vehicle width direction of the side member and above the lower end of the side member, and a bracket mounted state where the fixed part is fixed to the bracket support part. It has a step support portion that supports the side step at the lower outside of the support portion in the vehicle width direction. The stopper portion projects from the outer surface of the side member in the vehicle width direction to the outside in the vehicle width direction, and faces the step bracket from the inside in the vehicle width direction.

In the above configuration, when the side step is pressed from the outside in the vehicle width direction and moves inward in the vehicle width direction due to a side collision of the vehicle or the like, the step bracket abuts on the stopper portion from the outside in the vehicle width direction. As a result, the load in the vehicle width direction at the time of a side collision can be transmitted to the side members at an early stage (at the initial stage of the side collision), and the rigidity of the step bracket is kept low while the side step is inward in the vehicle width direction. Movement can be suppressed.

According to the present disclosure, it is possible to suppress the inward movement of the side step in the vehicle width direction at the time of a side collision of the vehicle while keeping the rigidity of the step bracket low.

FIG. 1 is an external perspective view schematically showing a vehicle including the step mounting structure according to the first embodiment of the present disclosure. FIG. 2 is a cross-sectional view taken along the line II-II of the step mounting structure of FIG. FIG. 3 is a bottom view of the step mounting structure of FIG. 2 as viewed from the direction of arrow III. FIG. 4 is a sectional view taken along line IV-IV of the step mounting structure of FIG. FIG. 5 is a cross-sectional view of the step mounting structure of the second embodiment of the present disclosure.

Hereinafter, the first embodiment of the present disclosure will be described with reference to the drawings. In the figure, FR indicates the front of the vehicle, UP in the figure indicates the upper part of the vehicle, and IN in the figure indicates the inside in the vehicle width direction. Further, in the following description, the front-rear direction means the front-rear direction of the vehicle 1, and the left-right direction means the left-right direction in the vehicle width direction when facing the front of the vehicle.

As shown in FIG. 1, the vehicle 1 provided with the floor reinforcement structure according to the present embodiment is a vehicle with a frame in which the body 3 is supported by the vehicle body frame 2. The vehicle body frame 2 is a ladder-shaped ladder frame in which left and right side members 4 extending in the front-rear direction on both sides in the vehicle width direction are connected by a plurality of cross members 5 extending in the vehicle width direction, and the body 3 is a plurality of front, rear, left and right sides. It is elastically supported by the vehicle body frame 2 at the location.

As shown in FIG. 2, the body 3 includes a floor panel 7 forming the floor surface of the passenger compartment 6 and left and right side sills 8 extending in the front-rear direction on both sides in the vehicle width direction (only the left side is shown in FIG. 2). The left and right edge portions of the floor panel 7 are fixed to and supported by the side sill 8 by welding or the like. The side sill 8 constitutes a bracket support portion on the body 3 side, and is arranged outside the side member 4 in the vehicle width direction. Below the left and right side sills 8 outside in the vehicle width direction, left and right side steps 20 (only the left side is shown in FIGS. 1 and 2) are provided as scaffolding for passengers getting on and off the passenger compartment 6. The side step 20 is a plate-like body extending in the front-rear direction so as to correspond to both the front seat occupant and the rear seat occupant, and as shown in FIG. 3, the side sill 8 is provided via the

step brackets

21, 22, and 23. Is fixed to. In the present embodiment, the side steps 20 are attached by three

step brackets

21, 22, 23, which are the front bracket 21, the center bracket 22, and the rear bracket 23, which are arranged apart from each other in the front and rear. Of the three

step brackets

21, 22, 23, the central bracket 22 is composed of a bracket main body 24 and a stopper portion 25. On the other hand, the front bracket 21 and the rear bracket 23 are composed of a bracket main body 24 and do not have a stopper portion 25. Since the side steps 20 and the

step brackets

21, 22, 23 are similarly configured and attached to the body 2 on the left and right sides of the body 3, the left side step 20 and the

step brackets

21, 22, and 23 are described below. 23 will be described, and the description of the right side step 20 and the

step brackets

21, 22, 23 will be omitted. Further, the number of

step brackets

21, 22, and 23 is not limited to three, and may be two or less or four or more.

In a predetermined range in the front-rear direction in which the side step 20 is arranged, the outer surface 9 in the vehicle width direction of the side member 4 is substantially orthogonal to the vehicle width direction as shown in FIG. 2, and the lower portion of the side sill 8 is the side member 4. The side step 20 is arranged at substantially the same height as the upper portion of the outer surface 9 in the vehicle width direction, and the side step 20 is arranged at substantially the same height as the lower portion of the outer surface 9 in the vehicle width direction of the side member 4.

As shown in FIGS. 2 to 4, in the bracket main body 24 of each

step bracket

21, 22, 23, the front and rear bracket side plate portions 27 are bent rearward or downward from the front end edge and the rear end edge of the bracket substrate portion 26. The upper portion of the bracket substrate portion 26 formed in an extending U-shaped cross section constitutes a fixing portion 28 fixed to the side sill 8 on the outside in the vehicle width direction of the side member 4 and above the lower end of the side member 4, and constitutes the bracket substrate. The lower portion of the portion 26 constitutes a step support portion 29 that supports the side step 20 below the outside of the side sill 8 in the vehicle width direction in a bracket-mounted state in which the fixing portion 28 is fixed to the side sill 8. The fixing portion 28 is bent in an L shape so as to overlap the inner side surface portion of the sill (the side surface portion on the inner side in the vehicle width direction of the side sill 8) 10 and the lower surface portion (lower surface portion of the side sill 8) 11 of the sill from the inside and the lower side in the vehicle width direction. It is fastened and fixed to the inner side surface portion 10 of the sill and the lower surface portion 11 of the sill by the bolt 12. The intermediate portion 30 of the bracket substrate portion 26 bends and extends downward from the outer end of the fixing portion 28 in the vehicle width direction, and the step support portion 29 bends from the lower end of the intermediate portion 30 and extends outward in the vehicle width direction. The side step 20 overlaps the step support portion 29 from above, and is fastened and fixed to the step support portion 29 by bolts 13.

The stopper portion 25 is formed in a U-shaped cross section in which the front and rear stopper parallel plate portions 32 are bent from the front and rear end edges of the stopper tip plate portion 31 substantially orthogonal to the vehicle width direction and extend outward in the vehicle width direction. It is arranged between the front and rear bracket side plate portions 27 of the above. The outer edge of the front and rear stopper parallel plate portions 32 in the vehicle width direction is formed in a staircase shape so as to follow the bent shape of the bracket substrate portion 26 of the central bracket 22, and is welded to the inner surface or the lower surface of the bracket substrate portion 26 in the vehicle width direction. It is fixed by such as. The upper portion, the intermediate portion, and the lower portion of the stopper parallel plate portion 32 are fixed to the fixing portion 28, the intermediate portion 30, and the step support portion 29 of the bracket substrate portion 26, respectively. By fixing the stopper parallel plate portion 32 to the bracket substrate portion 26, the bracket main body 24 and the stopper portion 25 are integrated, and the stopper portion 25 is continuously up and down from the fixing portion 28 to the step support portion 29. It protrudes inward from the range in the vehicle width direction. In this embodiment, since the front bracket 21 and the rear bracket 23 are not provided with the stopper portion 25, the plate width in the front-rear direction of the bracket substrate portion 26 of the front bracket 21 and the rear bracket 23 (front and rear bracket side plate portions 27). Distance) is set to be narrower than the plate width in the front-rear direction of the bracket substrate portion 26 of the central bracket 22 (see FIG. 3).

The stopper portion 25 (stopper tip plate portion 31) protrudes inward from the bracket body 24 in the vehicle width direction to the inside in the vehicle width direction from the side sill 8 (sill inner side surface portion 10), and the vehicle is projected on the vehicle width direction outer surface 9 of the side member 4. Facing from the outside in the width direction. The upper end of the stopper tip plate portion 31 is located below the upper end of the vehicle width direction outer surface 9 of the side member 4, and the lower end of the stopper tip plate portion 31 is located below the lower end of the vehicle width direction outer surface 9 of the side member 4. Is also located above. In other words, substantially the entire area of the projection surface obtained by projecting the inner end portion of the stopper 25 in the vehicle width direction (stopper tip plate portion 31) inward in the vehicle width direction overlaps with the outer surface 9 of the side member 4 in the vehicle width direction.

According to the present embodiment, when the side step 20 is pressed from the outside in the vehicle width direction and moves inward in the vehicle width direction due to a side collision of the vehicle 1 (collision from the vehicle width direction) or the like, the stopper portion 25 of the central bracket 22 The stopper tip plate portion 31 comes into contact with the outer surface 9 of the side member 4 in the vehicle width direction from the outside in the vehicle width direction. As a result, the load in the vehicle width direction at the time of side collision can be transmitted to the side member 4 at an early stage (at the initial stage of side collision), and the side step while suppressing the rigidity of the

step brackets

21, 22, and 23 to a low level. It is possible to suppress the movement of 20 inward in the vehicle width direction.

The stopper portion 25 projects inward in the vehicle width direction from a predetermined vertical range continuous from the fixed portion 28 to the step support portion 29, and the upper end of the stopper portion 25 is lower than the upper end of the outer surface 9 of the side member 4 in the vehicle width direction. Since the lower end of the stopper portion 25 is located above the lower end of the outer surface 9 of the side member 4 in the vehicle width direction, the central bracket 22 is displaced in the vertical direction with respect to the vehicle body frame 2 at the time of a side collision of the vehicle 1. Even in this case, the side member 4 can reliably receive the stopper portion 25 that moves inward in the vehicle width direction.

Further, since the stopper portion 25 and the side member 4 can be brought into contact with each other in a wide range (area), the concentration of the load (stress) input to the side member 4 can be relaxed and the deformation of the side member 4 can be suppressed. Can be done.

Next, the second embodiment of the present disclosure will be described with reference to FIG. In this embodiment, the stopper portion 33 is fixed to the side member 4 instead of the stopper portion 25 fixed to the central bracket 22, and other configurations are common to those of the first embodiment. The same reference numerals are given to the configurations common to the embodiments, and detailed description thereof will be omitted.

As shown in FIG. 5, in the present embodiment, the stopper portion 25 is not fixed to the bracket substrate portion 26 of the central bracket 22, but the stopper portion 33 is fixed to the outer surface 9 of the side member 4 in the vehicle width direction. The stopper portion 33 is formed in a U-shaped cross section in which the front and rear stopper parallel plate portions 35 are bent from the front and rear end edges of the stopper tip plate portion 34 substantially orthogonal to the vehicle width direction and extend inward in the vehicle width direction. The inner edge of the parallel plate portion 35 in the vehicle width direction is fixed to the outer surface 9 of the side member 4 in the vehicle width direction by welding or the like. The stopper portion 33 (stopper tip plate portion 34) protrudes outward in the vehicle width direction from the vehicle width direction outer surface 9 of the side member 4, and faces the intermediate portion 30 of the bracket substrate portion 26 of the central bracket 22 from the vehicle width direction inside. ..

According to the present embodiment, when the side step 20 is pressed from the outside in the vehicle width direction and moves inward in the vehicle width direction due to a side collision of the vehicle 1, the central bracket 22 is moved to the stopper tip plate portion 34 of the stopper portion 33 in the vehicle width. Contact from the outside in the direction. As a result, the load in the vehicle width direction at the time of side collision can be transmitted to the side member 4 at an early stage (at the initial stage of side collision), and the side step 20 while suppressing the rigidity of the

step brackets

21, 22, and 23 to a low level. It is possible to suppress the movement of the vehicle inward in the vehicle width direction.

Although the present disclosure has been described above based on the above-described embodiment, the present disclosure is not limited to the contents of the above-described embodiment, and of course, it can be changed as appropriate without departing from the present disclosure. That is, it goes without saying that all other embodiments, examples, operational techniques, and the like made by those skilled in the art based on this embodiment are included in the scope of the present disclosure.

For example, in the above embodiment, the

stopper portions

25 and 33 are provided corresponding only to the central bracket 22 among the three

step brackets

21 and 22 and 23 that are separated from each other in the front-rear direction.

Stoppers

25 and 33 may be provided corresponding to the brackets (front bracket 21 and / or rear bracket 23).

Further, in the above embodiment, the

stopper portions

25 and 33 have a U-shaped cross section, but the

stopper portions

25 and 33 may have another shape (rectangular tubular shape or the like).

This application is based on a Japanese patent application (Japanese Patent Application No. 2019-177186) filed on September 27, 2019, the contents of which are incorporated herein by reference.

This disclosure can be applied to a framed vehicle with side steps.

1: Vehicle 2: Body frame 3: Body 4: Side member 5: Cross member 6: Vehicle interior 7: Floor panel 8: Side sill (bracket support)
9: Side member outer surface in vehicle width direction 10: Sill inner side surface 11: Sill lower surface 12, 13: Bolt 20: Side step 21: Front bracket (step bracket)
22: Center bracket (step bracket)
23: Rear bracket (step bracket)
24: Bracket main body 25, 33: Stopper part 26: Bracket board part 27: Bracket side plate part 28: Bracket board part fixing part 29: Bracket board part step support part 30: Bracket board part intermediate part 31, 34: Stopper Tip plate parts 32, 35: Stopper parallel plate part

Claims

A step bracket for attaching a side step to the outside of the side member in the vehicle width direction in a framed vehicle in which the body is elastically supported by a vehicle body frame having a side member extending in the vehicle front-rear direction.
A fixed portion fixed to the bracket support portion on the body side outside the side member in the vehicle width direction and above the lower end of the side member, and a bracket mounted state in which the fixed portion is fixed to the bracket support portion. A bracket body having a step support portion that supports the side step below the outside in the vehicle width direction of the bracket support portion,
A stopper portion that protrudes inward in the vehicle width direction from the bracket main body to the inside in the vehicle width direction from the bracket support portion and faces the outer surface in the vehicle width direction of the side member from the outside in the vehicle width direction is provided. Vehicle step bracket.
The step bracket according to claim 1.
The stopper portion projects inward in the vehicle width direction from a predetermined vertical range continuous from the fixed portion to the step support portion.
The upper end of the stopper portion is located below the upper end of the side member.
A vehicle step bracket characterized in that the lower end of the stopper portion is located above the lower end of the side member.
A step mounting structure for mounting a side step on the outside in the vehicle width direction of the side member in a framed vehicle in which the body is elastically supported by a vehicle body frame having side members extending in the front-rear direction of the vehicle.
A fixed portion fixed to the bracket support portion on the body side outside the side member in the vehicle width direction and above the lower end of the side member, and a bracket mounted state in which the fixed portion is fixed to the bracket support portion. A step bracket having a step support portion that supports the side step below the outside in the vehicle width direction of the bracket support portion, and a step bracket.
A vehicle step mounting structure comprising a stopper portion that projects from the outer surface of the side member in the vehicle width direction to the outside in the vehicle width direction and faces the step bracket from the inside in the vehicle width direction.