JP7281104B2 - Underrun protector bracket and underrun protector mounting structure - Google Patents

Description

The present disclosure relates to an underrun protector bracket and an underrun protector mounting structure that are fixed to the vehicle body side to support the underrun protector.

Patent Document 1 describes a connection bracket for attaching a rear underrun protector to a vehicle body frame. The connection bracket is provided so as to be sandwiched between a pair of connection plates (an inner connection plate and an outer connection plate) that connect the rear underrun protector and the vehicle body frame, and between the pair of connection plates, and is mounted on the vehicle body frame in the longitudinal direction of the connection plates. and a fixing portion for fixing the connecting plate and the rear underrun protector with a fastening member. The fixed part is fixed to the outer connecting plate and the inner connecting plate by welding.

JP 2018-188018 A

Like the connection bracket of Patent Document 1, in a structure in which a protector support plate member (fixed portion) is fixed to a bracket body (connection plate) and an underrun protector is fixed to the protector support plate member, the protector support plate member is attached to the bracket body. If the protector support plate member is welded against the bracket body, the movement of the protector support plate member relative to the bracket body is restricted only by the welding. For this reason, the support state of the underrun protector is not stable when a load is input, and the load input to the underrun protector may not be efficiently transmitted to the vehicle body, making it difficult to efficiently increase the support rigidity of the underrun protector. .

Accordingly, an object of the present disclosure is to provide an underrun protector bracket and an underrun protector mounting structure capable of efficiently increasing the support rigidity of the underrun protector.

In order to achieve the above object, a first aspect of the present disclosure is to support an underrun protector that extends in the vehicle width direction at a lower portion on one side in the front-rear direction of the vehicle and suppresses the intrusion of another vehicle in the vehicle width direction. An underrun protector bracket fixed to a bracket mounting surface on the vehicle body side that intersects with the underrun protector bracket, comprising a bracket body and a protector support plate member.

The bracket body has a base plate portion including an upper base portion fixed to the bracket mounting surface so as to overlap from one side in the vehicle width direction and a lower base portion continuously extending downward from the upper base portion. The protector support plate member is fixed to one side in the front-rear direction of the lower portion of the base of the bracket body.

The protector support plate member includes a protector support portion that stands up crossing the front-rear direction, the underrun protector being fixed overlapping from one side in the front-rear direction, and an upper connection extending from the upper end edge portion of the protector support portion to the other side in the front-rear direction. and a lower connecting portion extending from the lower edge portion of the protector supporting portion to the other side in the front-rear direction and facing the upper connecting portion. One end edge in the front-rear direction of the lower portion of the base of the bracket body is open on one side in the front-rear direction and extends linearly to the other side in the front-rear direction, and the end edge portion on the other side in the front-rear direction of the upper connecting portion is inserted. A groove-like notch is formed.

The protector support plate member inserts the edge of the upper connecting part on the other front-rear direction side into the notch of the bracket body, and the protector support part is brought into contact with the edge part of the lower part of the base on the front-rear direction one side below the notch. It is fixed to the bottom of the base in a contact state.

In the above configuration, when another vehicle or the like collides with the underrun protector from one side in the front-rear direction, a load toward the other side in the front-rear direction is input to the bracket body via the protector support plate member. A groove-shaped notch into which the edge portion of the upper connecting portion of the protector support plate member on the other front-rear direction side is inserted is formed in one end edge portion of the lower portion of the base of the bracket body in the front-rear direction direction. The protector supporting plate member is formed by inserting the edge portion of the upper connecting portion on the other side in the front-rear direction into the notch of the bracket body, and inserting the edge portion on the other side in the front-rear direction of the lower base below the notch. The protector support plate is fixed to the bracket body by welding to the lower base part while the protector support part is in contact with the base part. In addition to being restricted by the engagement of the two by inserting the edge portion on the other side in the front-rear direction of the upper connecting portion into the notch in the lower portion of the base. As a result, the support state of the underrun protector is stabilized when a load is input, so that the load input to the underrun protector can be efficiently transmitted to the vehicle body side, and the support rigidity of the underrun protector can be efficiently increased.

A second aspect of the present disclosure is the underrun protector bracket of the first aspect, comprising a reinforcing plate member fixed to the bracket body.

The bracket body includes the base plate portion, a first edge plate portion extending from one edge portion of the base plate portion in the front-rear direction above the notch to the one side in the vehicle width direction, and the base plate portion in the front-rear direction and others. It integrally has a second end edge plate portion extending from the side edge portion to one side in the vehicle width direction and facing the first end edge plate portion. The reinforcing plate member includes a facing plate portion that faces the lower portion of the base of the bracket body from one side in the vehicle width direction, a top plate portion that extends from the upper edge of the facing plate portion to the other side in the vehicle width direction, and a lower edge of the facing plate portion. and a lower surface plate portion extending from the portion to the other side in the vehicle width direction. The edge portions on the other side in the vehicle width direction of the upper surface plate portion and the lower surface plate portion are respectively fixed to the base lower portion of the bracket body, and the edge portion on the one side in the front-rear direction of the opposing plate portion supports the protector of the protector support plate member. The other end edge portion in the front-rear direction of the opposing plate portion is fixed to the second end edge plate portion of the bracket body. The base lower portion, the second edge plate portion, the opposing plate portion, the upper surface plate portion, the lower surface plate portion, and the protector support portion form a rectangular closed space. The upper connection portion and the lower connection portion of the protector support plate member are fixed to the upper surface plate portion and the lower surface plate portion of the reinforcing plate member, respectively.

In the above configuration, the lower part of the base, the second edge plate portion, the opposing plate portion, the upper surface plate portion, the lower surface plate portion, and the protector support portion form a rectangular closed space (box structure), so that the underrun protector can be formed by inputting a load. The deformation of the bracket can be reliably suppressed by the box structure.

Since the upper connecting portion and the lower connecting portion of the protector support plate member are fixed to the upper surface plate portion and the lower surface plate portion of the reinforcing plate member, respectively, the upper surface plate portion and the lower surface plate portion of the reinforcing plate member are connected by the protector support plate member. It will be in a connected state. Therefore, the support state of the underrun protector is further stabilized when a load is applied.

A third aspect of the present disclosure is to attach the underrun protector bracket of the first or second aspect to a bracket mounting surface on the vehicle body side that intersects the vehicle width direction, and attach the underrun protector bracket to the vehicle width direction at the lower part of one side of the vehicle in the front-rear direction. An underrun protector mounting structure for mounting an underrun protector to an underrun protector bracket, the underrun protector bracket extending in a direction to prevent other vehicles from slipping into the underrun protector bracket. An underrun protector is attached to the protector support plate member of the protector bracket.

According to the underrun protector bracket and the underrun protector mounting structure of the present disclosure, it is possible to efficiently increase the support rigidity of the underrun protector.

1 is a side view schematically showing a vehicle provided with an underrun protector according to one embodiment of the present invention; FIG. Fig. 2 is a perspective view of the underrun protector bracket assembled to the vehicle body frame; Fig. 3 is a perspective view of the underrun protector bracket viewed from the outside in the vehicle width direction; FIG. 3 is an exploded perspective view of an underrun protector bracket; FIG. 3 is a side cross-sectional view of the underrun protector bracket; FIG. 4 is a side cross-sectional view of a bracket body and a protector support plate member;

An embodiment of the present invention will be described below with reference to FIGS. 1 to 6. FIG. FR in the drawing indicates the front of the vehicle, UP indicates the upper side of the vehicle, and IN in the drawing indicates the inner side in the vehicle width direction. Further, the left-right direction in the following description is the left-right direction when the vehicle faces forward.

As shown in FIG. 1, a vehicle 1 according to the present embodiment has a cab 2 that is generally an engine (not shown).
It is a cab-over type vehicle located forward.

As shown in FIGS. 1 to 3, the vehicle body frame 3 of the vehicle 1 includes left and right side members 4 and a plurality of cross members 5 (only the rear end cross member 5 is shown in FIG. 2). The left and right side members 4 are arranged on both left and right sides in the vehicle width direction and extend in the vehicle front-rear direction. Each side member 4 has a substantially U-shaped cross section that opens inward in the vehicle width direction, and integrally includes a side wall portion 6 , an upper wall portion 7 and a lower wall portion 8 . The upper wall portion 7 and the lower wall portion 8 extend from both upper and lower ends of the side wall portion 6 inward in the vehicle width direction so as to face each other. Both ends of each cross member 5 are joined to the left and right side members 4 to connect the side members 4 to each other.

A rear underrun protector (RUP) 40 is supported on the upright surface on the vehicle width direction outer side of the side wall portion 6 at the rear end portion of the left and right side members 4 (the bracket mounting surface 9 on the vehicle side that intersects the vehicle width direction). An underrun protector bracket (UP bracket) 10 is fixed for each. The RUP 40 supported by the UP bracket 10 extends in the vehicle width direction below the rear end portion of the vehicle body frame 3 (lower portion on one side in the front-rear direction of the vehicle 1), and when another vehicle collides from the rear of the vehicle 1, the RUP 40 extends. To restrain other vehicles from slipping under the vehicle 1. - 特許庁The left and right UP brackets 10 are configured substantially symmetrical with respect to the center of the vehicle 1 in the vehicle width direction.

As shown in FIGS. 2 to 6, the UP bracket 10 includes a bracket body 11, a protector support plate member 12 and a reinforcing plate member 13. As shown in FIG.

The bracket body 11 integrally has a base plate portion 14 , a first edge plate portion 15 and a second edge plate portion 16 . The base plate portion 14 has a flat plate shape standing upright in the front-rear direction, and is composed of an upper base portion 17 and a lower base portion 18 . The base upper portion 17 is fixed to overlap the bracket mounting surface 9 of the side member 4 from the outside in the vehicle width direction (one side in the vehicle width direction), and the base lower portion 18 continuously extends downward from the base upper portion 17 . A lower region of the base lower portion 18 bulges rearward in a rectangular shape. At the rear edge of the upper end of the lower region of the base 18, there is a groove that opens rearward and extends linearly forward into which the front edge of an upper connecting portion 21 of the protector support plate member 12, which will be described later, is inserted. A notch 19 of is formed.

The first edge plate portion 15 is bent outward in the vehicle width direction above the notch 19 from the rear edge portion (the edge portion on one side in the front-rear direction) of the base plate portion 14 (the upper base portion 17 and the lower base portion 18). and extend. The second edge plate portion 16 bends and extends outward in the vehicle width direction from the front edge portion (the edge portion on the other side in the front-rear direction) of the base plate portion 14 (the upper base portion 17 and the lower base portion 18) to form a first end. It faces the edge plate portion 15 .

A base reinforcing plate 33 for reinforcing the base upper portion 17 is superimposed and fixed to the base upper portion 17 of the bracket body 11, and a plurality of bolt insertion holes 34 are formed through the base upper portion 17 and the base reinforcing plate 33. there is The base upper portion 17 is fastened and fixed to the bracket mounting surface 9 by bolts 35 that pass through the bolt insertion holes 34 .

The protector support plate member 12 is a member with a U-shaped cross section that is open rearward, and integrally has a protector support portion 20, an upper connection portion 21, and a lower connection portion 22, and is positioned behind the lower base portion 18 of the bracket body 11. fixed on the side. The protector support portion 20 is in the shape of a rectangular flat plate standing upright across the front-rear direction, and the upper connecting portion 21 bends and extends forward (on the other side in the front-rear direction) from the upper end edge portion of the protector support portion 20 . The lower connecting portion 22 bends and extends forward from the lower end edge portion of the protector supporting portion 20 to face the upper connecting portion 21 . A bolt insertion hole 23 is formed in the protector support portion 20 , and the RUP 40 overlaps the protector support portion 20 from behind and is fastened and fixed to the protector support plate member 12 by a bolt 24 inserted through the bolt insertion hole 23 .

The protector support plate member 12 inserts the rear end edge of the upper connecting portion 21 into the notch 19 of the bracket body 11 and abuts the protector support portion 20 on the rear end edge of the lower base portion 18 below the notch 19 . , the upper connecting portion 21, the protector supporting portion 20, and the lower connecting portion 22 are welded to the base lower portion 18, respectively, so that they are fixed to the bracket body 11. As shown in FIG. The illustration of the welded portion between the protector support plate member 12 and the bracket body 11 (lower base portion 18) is omitted.

The reinforcing plate member 13 integrally has a facing plate portion 25 , an upper plate portion 26 and a lower plate portion 27 . The opposing plate portion 25 has a flat plate shape and faces the lower region of the lower base portion 18 of the bracket body 11 from the outside in the vehicle width direction. A front edge portion of the opposing plate portion 25 is fixed to the second edge plate portion 16 of the bracket body 11 by welding 28 . The upper surface plate portion 26 bends and extends from the upper edge portion of the opposing plate portion 25 toward the vehicle width direction inner side (the other side in the vehicle width direction). An inner edge portion of the upper surface plate portion 26 in the vehicle width direction is fixed to the base lower portion 18 of the bracket body 11 by welding 29 . The lower plate portion 27 extends from the lower edge portion of the opposing plate portion 25 while bending inward in the vehicle width direction, and faces the upper plate portion 26 from below. An inner edge portion of the lower surface plate portion 27 in the vehicle width direction is fixed to the base lower portion 18 of the bracket body 11 by welding (not shown).

The protector support portion 20 of the protector support plate member 12 is welded 30 (welded 30 ( Only the welded portion with the opposing plate portion 25 is shown). The upper connection portion 21 and the lower connection portion 22 of the protector support plate member 12 are fixed to the upper surface plate portion 26 and the lower surface plate portion 27 of the reinforcing plate member 13 by welding 31, respectively. The lower base portion 18 , the second edge plate portion 16 , the opposing plate portion 25 , the upper plate portion 26 , the lower plate portion 27 and the protector support portion 20 form a rectangular closed space 32 .

According to the UP bracket 10 of the present embodiment, when another vehicle or the like collides with the RUP 40 from behind, a forward load is input to the bracket body 11 via the protector support plate member 12 . A groove-like notch 19 into which the front edge of the upper connecting portion 21 of the protector support plate member 12 is inserted is formed in the rear edge of the lower base portion 18 of the bracket body 11 in a straight forward direction. In the protector support plate member 12, the front edge of the upper connecting portion 21 is inserted into the notch 19 of the bracket body 11, and the protector support 20 is brought into contact with the rear edge of the lower base 18 below the notch 19. In this state, the upper connection portion 21, the protector support portion 20, and the lower connection portion 22 are welded to the lower base portion 18, respectively, and fixed to the bracket body 11. Therefore, the movement of the protector support plate member 12 with respect to the bracket body 11 is , between the upper connecting portion 21 and the lower base portion 18, between the protector support portion 20 and the lower base portion 18, and between the lower connecting portion 22 and the lower base portion 18. The front edge of the upper connecting portion 21 is inserted into the notch 19 and is also regulated by the engagement between the two. This stabilizes the support state of the RUP 40 when a load is input, so that the load input to the RUP 40 can be efficiently transmitted to the vehicle body side, and the support rigidity of the RUP 40 can be efficiently increased.

Since the base lower portion 18, the second edge plate portion 16, the opposing plate portion 25, the upper surface plate portion 26, the lower surface plate portion 27, and the protector support portion 20 form a rectangular closed space 32 (box structure), a Deformation of the UP bracket 10 can be reliably suppressed by the box structure.

Since the first edge plate portion 15 and the second edge plate portion 16 continuously extend from the base lower portion 18 to the base upper portion 17 on both sides of the base plate portion 14 in the front-rear direction, the surface of the base plate portion 14 is It is possible to suppress deformation by increasing rigidity.

Further, since the upper connection portion 21 and the lower connection portion 22 of the protector support plate member 12 are fixed to the upper surface plate portion 26 and the lower surface plate portion 27 of the reinforcing plate member 13 respectively, the upper surface plate portion 26 and the lower surface plate portion 27 of the reinforcing plate member 13 are fixed. The bottom plate portion 27 is connected to the protector support plate member 12 . Therefore, the support state of the RUP 40 during load input is further stabilized.

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, a rear underrun protector bracket that supports the RUP 40 has been described, but instead of or in addition to this, a front underrun protector (FUP) 41 arranged below the front end of the vehicle 1 is supported. The front underrun protector bracket to be used may be constructed in the same manner as the rear underrun protector bracket (UP bracket 10).

INDUSTRIAL APPLICABILITY The present invention can be applied to a vehicle in which an underrun protector is supported on the vehicle body side.

1: Vehicle 2: Cab 3: Body Frame 4: Side Member 5: Cross Member 6: Side Wall Part 7: Upper Wall Part 8: Lower Wall Part 9: Bracket Mounting Surface 10: Underrun Protector Bracket 11: Bracket Body 12: Protector support plate member 13: Reinforcing plate member 14: Base plate portion 15: First edge plate portion 16: Second edge plate portion 17: Upper base portion 18: Lower base portion 19: Notch 20: Protector support portion 21: Upper Connection portion 22: Lower connection portions 23, 34: Bolt insertion holes 24, 35: Bolt 25: Opposed plate portion 26: Upper plate portion 27: Lower plate portions 28, 29, 30, 31: Welding 32: Rectangular closed space 33 : Base reinforcing plate 40: Rear underrun protector (underrun protector)
41: Front underrun protector (underrun protector)

Claims (3)

The underrun is fixed to the mounting surface of the bracket on the vehicle body side that intersects the vehicle width direction in order to support the underrun protector that extends in the vehicle width direction at the lower part of one side of the vehicle in the front-rear direction and prevents other vehicles from getting under. A protector bracket,
a bracket body having a base plate portion including an upper base portion fixed to the bracket mounting surface so as to overlap from one side in the vehicle width direction and a lower base portion extending continuously downward from the upper portion of the base;
a protector support plate member fixed to one side in the front-rear direction of the lower portion of the base of the bracket body,
The protector support plate member includes a protector support portion that stands up crossing the front-rear direction, and the underrun protector is overlapped and fixed from one side in the front-rear direction; an extending upper connecting portion; and a lower connecting portion extending from a lower edge portion of the protector supporting portion to the other side in the front-rear direction and facing the upper connecting portion,
An end edge portion on one side in the front-rear direction of the lower portion of the base of the bracket main body is open on one side in the front-rear direction and linearly extends to the other side in the front-rear direction. A groove-shaped notch is formed into which the
The protector support plate member inserts the other end edge portion of the upper connecting portion in the front-rear direction into the notch of the bracket body, and the one end edge portion of the lower base portion in the front-rear direction is inserted below the notch. The underrun protector bracket is fixed to the lower part of the base while the protector support portion is in contact with the underrun protector bracket. The underrun protector bracket according to claim 1,
A reinforcing plate member fixed to the bracket body,
The bracket body includes the base plate portion, a first edge plate portion extending from one edge portion in the front-rear direction of the base plate portion to one side in the vehicle width direction above the notch, and the base plate portion. a second end edge plate portion extending from the other end edge portion in the front-rear direction to one side in the vehicle width direction and facing the first end edge plate portion;
The reinforcing plate member includes: a facing plate portion that faces the lower portion of the base of the bracket body from one side in the vehicle width direction; It integrally has a lower surface plate portion extending from the lower edge portion of the plate portion to the other side in the vehicle width direction, and the edge portion of the upper surface plate portion and the lower surface plate portion on the other side in the vehicle width direction is the bracket main body. Each is fixed to the lower part of the base, the end edge portion on one side in the front-rear direction of the opposing plate portion is fixed to the protector support portion of the protector support plate member, and the end edge portion on the other side in the front-rear direction of the opposing plate portion is the fixed to the second edge plate portion of the bracket body;
The base lower portion, the second edge plate portion, the facing plate portion, the upper surface plate portion, the lower surface plate portion, and the protector support portion form a rectangular closed space,
The underrun protector bracket, wherein the upper connecting portion and the lower connecting portion of the protector supporting plate member are fixed to the upper surface plate portion and the lower surface plate portion of the reinforcing plate member, respectively. The underrun protector bracket according to claim 1 or claim 2 is attached to a bracket mounting surface on the vehicle body side that intersects the vehicle width direction, and extends in the vehicle width direction at the lower part of one side in the front-rear direction of the vehicle to extend in the vehicle width direction. An underrun protector mounting structure for mounting an underrun protector that suppresses slipping into the underrun protector bracket,
The base upper part of the underrun protector bracket is attached to the bracket mounting surface,
An underrun protector attachment structure, wherein the underrun protector is attached to the protector support plate member of the underrun protector bracket.

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