JP6688480B2 - Rear structure of cab - Google Patents

Description

  The present invention relates to a structure of a rear surface portion of a cab of a vehicle.

  Patent Document 1 describes a cab of a cab-over type vehicle. A lean hosement is provided inside the back panel that constitutes the cab. The lower end of the lean hosement is fixed to the lower end of the back panel by spot welding or the like, protrudes inside the back panel and extends upward, and the upper end thereof extends in the left-right direction of the back panel. It is fixed by spot welding, etc. The back member protrudes inside the cab at a position below the rear window of the back panel and extends in the left-right direction. In the portion of the back panel where the lean hose is installed, a reinforcing bead is formed by extending the back panel to the outside of the cab and extending in the vertical direction. The publication discloses a state in which the bead projects rearward at an intermediate portion between the lower end of the rear window and the lower end of the back panel.

JP, 2002-53079, A

  In the back panel of the cab described in Patent Document 1, the lean hosement is provided below the rear window and below the back member extending in the vehicle width direction. However, since the bead of the back panel below the back member protrudes rearward in a partial region of the back panel (the intermediate portion between the lower end of the rear window and the lower end of the back panel), it is against the cab. It is difficult to sufficiently secure the strength of the back panel against a load input from above (or below) in a region below the back member. Further, since no lean hoses are provided on the back panel above the back member, it is difficult to secure sufficient strength of the back panel above the back member.

  Therefore, it is an object of the present invention to provide a rear surface structure of a cab capable of sufficiently securing strength against a load input from the vertical direction.

  In order to solve the above problems, a first aspect of the present invention is a rear surface structure of a cab supported by a vehicle body frame from below, and includes a back panel and a reinforcement. The back panel has a bead that extends in the up-down direction while protruding to one side in the front-rear direction, and stands up at the rear end of the cab so as to intersect the front-rear direction. The reinforcement is a left and right fixing surface portion fixed to both left and right regions of the bead on the other surface in the front-rear direction of the back panel, and the other side of the bead protruding to the other side between the left and right fixing surface portions. And a projecting portion facing each other, and extends in the up-down direction to define a closed space between the bead of the back panel. The closed space extends over substantially the entire area of the back panel in the vertical direction.

  In the above configuration, the bead of the back panel protrudes to one side in the front-rear direction, and the protruding portion of the reinforcement protrudes to the other side in the front-rear direction. It is possible to secure a large cross-sectional area of the closed space between the bead of the panel and the reinforcement. Therefore, it is possible to sufficiently secure the strength of the back panel with respect to the vertical load applied to the cab.

  Further, since the closed space between the bead and the reinforcement of the back panel extends over substantially the entire area of the back panel in the vertical direction, it is necessary to sufficiently secure the strength of the back panel against the vertical load applied to the cab. You can

  Therefore, it is possible to sufficiently secure the strength of the rear surface portion of the cab against the load input from the vertical direction.

  A second aspect of the present invention is the structure of the rear surface portion of the cab of the first aspect, which includes a rear mount rail. The rear mount rail has a supported surface portion that is supported by the vehicle body frame from below, extends in the vehicle width direction at the lower rear end of the cab, and is joined to the lower edge portion of the back panel. The rear mount rail has a supported area including a supported surface portion within a predetermined range in the vehicle width direction. The lower end of one of the bead and the reinforcement of the back panel is fixed to the supported region of the rear mount rail.

  In the above configuration, the supported surface portion of the rear mount rail is supported from below by the vehicle body frame, and one lower end portion of the bead and the reinforcement of the back panel is fixed to the supported area of the rear mount rail. . Therefore, the load applied to the cab from above is transmitted from the bead and the reinforcement to the vehicle body frame side through the supported region of the rear mount rail, and the load applied to the cab from below is applied to the rear mount rail. It is transmitted to the bead and reinforcement sides via the support area. In this way, the load from above (bead and reinforcement side) and the load from below (body frame side) are efficiently transmitted in the vertical direction via the supported area of the rear mount rail, so that the rear surface portion of the cab is It is possible to prevent stress concentration on a predetermined portion of the cab, and to secure the strength of the rear surface portion of the cab against a vertical load applied to the cab.

Further, since the load from above and the load from below are input to the same region (supported region) of the rear mount rail in the vehicle width direction, bending and deformation of the rear mount rail can be prevented, and the rear surface portion of the cab can be prevented. The strength of can be secured.
A third aspect of the present invention is the rear surface portion structure of the cab of the second aspect, wherein the bead of the back panel extends in the vertical direction in a state of protruding to the rear side. The left and right fixed surface portions of the reinforcement are fixed to the front surface of the back panel. The protrusion of the reinforcement projects toward the front and faces the bead from the front. The rear mount rail has a front plate portion, an upper plate portion that bends from an upper edge of the front plate portion and extends rearward, and a rear plate portion that bends from a rear end edge of the upper plate portion and extends downward. The upper plate portion of the rear mount rail has a supported surface portion that is supported by the vehicle body frame from below. The lower edge of the back panel is joined to the rear plate of the rear mount rail. The lower end of the reinforcement is connected to the supported surface of the upper plate of the rear mount rail.

  According to the present invention, it is possible to sufficiently secure the strength of the rear surface portion of the cab against the load input from the up and down direction.

FIG. 1 is an external perspective view of a vehicle according to an embodiment of the present invention. It is a schematic diagram of the rear surface part of a cab. It is a perspective view of the rear surface part of a cab. FIG. 4 is a sectional view taken along the line IV-IV of FIG. 3. It is an exploded view of the rear surface part of a cab. FIG. 6 is a sectional view taken along line VI-VI of FIG. 3.

  An embodiment of the present invention will be described below with reference to the drawings. In each drawing, FR indicates the front of the vehicle, UP indicates the upper side, and IN indicates the inner side in the vehicle width direction. Further, in the following description, the left-right direction means the left-right direction when facing the front of the vehicle.

  As shown in FIG. 1, the rear surface structure of the cab according to the present embodiment is applied to the cab 10 of a cab-over type truck 1 in which the cab 10 is generally disposed above an engine (not shown).

  As shown in FIG. 2, the truck 1 has a pair of left and right side members 2 extending in the front and rear of the vehicle, and a plurality of cross members 3 extending in the vehicle width direction and connecting the left and right side members 2 to each other. . The left and right side members 2 and the plurality of cross members 3 form a body frame 4 of the truck 1. The lower front end of the cab 10 is rotatably supported by the front end of the vehicle body frame 4 via a front cab mount (not shown). The rear end of the cab 10 is supported by the vehicle body frame 4 from below via a rear cab mount 5 fixed to the left and right side members 2. The rear cab mount 5 has a cushion rubber (not shown) on its upper surface, and elastically supports a rear cab mount bracket 6 described below from below via the cushion rubber. Note that only one cross member 3 is shown in FIG.

  As shown in FIGS. 2 to 4, the cab 10 includes a rear cab mount rail (rear mount rail) 11, a back panel 12, and a pair of left and right reinforcements 13, and is provided in front of the body frame 4 of the truck 1. It is arranged above the vehicle body and is supported by the vehicle body frame 4 from below. The rear cab mount rail 11, the back panel 12, and the left and right reinforcements 13 form a rear surface portion 7 of the cab 10 that partitions the rear of the cab 10 (hereinafter, referred to as a cab rear surface portion 7). Note that FIG. 4 shows only the reinforcement 13 on the left side.

  As shown in FIGS. 2 to 5, the rear cab mount rail 11 is a part of the floor panel 14 that partitions the lower side of the cab 10, and is bent so that the rear end side of the floor panel 14 projects upward. Is formed in the lower part of the rear end of the cab 10 and extends in the vehicle width direction to secure the rigidity of the rear end edge of the floor panel 14. The rear cab mount rail 11 includes a front plate portion 11a standing upright at a rear end portion of the floor panel 14, an upper plate portion 11b bent from an upper edge of the front plate portion 11a and extending rearward, and a rear end portion of the upper plate portion 11b. The rear plate portion 11c is bent from the edge 27 and extends downward. The rear plate portion 11c is formed into an open cross-section that opens downward, and defines a space 8 inside thereof. The upper plate portion 11b of the rear cab mount rail 11 has a pair of left and right mount bracket fixing portions (supported surface portions) 15. A pair of left and right rear cab mount brackets 6 are arranged below the left and right mount bracket fixing portions 15 and fixed to the left and right mount bracket fixing portions 15. The rear cab mount rail 11 has a pair of left and right supported regions 25, which are regions including the mount bracket fixing portion 15, within a predetermined range in the vehicle width direction. The left and right supported regions 25 are regions in which the supporting force from the rear cab mount 5 is relatively stronger than other regions, and each of the mount bracket fixing portion 15, the front region 26, and the rear region (not shown). Have. The front region 26 of the supported region 25 is a region of the front plate portion 11 a of the rear cab mount rail 11 that extends downward from the front end edge of the mount bracket fixing portion 15. The rear region of the supported region 25 is a region of the rear plate portion 11c of the rear cab mount rail 11 that extends downward from the rear end edge of the mount bracket fixing portion 15. The length of the front region 26 and the rear region of the supported region 25 in the vehicle width direction is substantially the same as the length of the mount bracket fixing portion 15 in the vehicle width direction. That is, the length of the predetermined range that is the length of the supported region 25 in the vehicle width direction is substantially the same as the length of the mount bracket fixing portion 15 in the vehicle width direction.

  As shown in FIG. 2, FIG. 3 and FIG. 5, the left and right rear cab mount brackets 6 are formed by a plate body in a frame shape penetrating in the front-rear direction, and a locking device capable of locking the rear cab mount 5 inside thereof ( (Not shown). The left and right rear cab mount brackets 6 are an upper plate portion 6a fixed to the mount bracket fixing portion 15 of the rear cab mount rail 11 in a surface contact state from below, and a lower plate portion supported by the rear cab mount 5 from below. 6b and 6b, respectively, are integrally provided and are arranged in the space 8 below the rear cab mount rail 11. That is, the left and right mount bracket fixing portions 15 of the rear cab mount rail 11 are supported from below by the vehicle body frame 4 via the left and right rear cab mount brackets 6 and the rear cab mount 5, and the cab rear surface portion 7 is attached to the vehicle body frame 4. It is supported from below.

  The left and right mount bracket fixing portions 15 of the rear cab mount rail 11 are configured so that the upper plate portion 6a of the rear cab mount rail 6 of the upper plate portion 11b of the rear cab mount rail 11 comes into surface contact with the rear cab mount bracket 11 from below. The length of the mount bracket fixing portion 15 in the vehicle width direction is approximately the same as the length of the upper plate portion 6a of the rear cab mount bracket 6 in the vehicle width direction. It is the same. In the present invention, “substantially the same” is a concept including not only completely the same but also a state in which it is slightly different due to an error in manufacturing.

  As shown in FIGS. 5 and 6, the back panel 12 is a plate that defines the rear of the cab 10, has a pair of left and right beads 17 extending in the up-down direction, and extends along the rear cab mount rail 11. Stand up at the rear end of the cab 10. The back panel 12 is formed so as to be curved so that its center portion in the vehicle width direction projects rearward from both ends in the vehicle width direction. The lower edge portion of the back panel 12 is arranged behind the rear plate portion 11c of the rear cab mount rail 11 and is joined to the rear plate portion 11c. A roof back rail 16 (see FIG. 4) extending in the vehicle width direction is fixed to the upper end edge of the back panel 12 on the front surface 21 side so as to project forward to form a closed cross section with the back panel 12. , The upper edge of the back panel 12 is reinforced. A rear edge portion of the roof panel 18 (see FIGS. 3 and 4) that partitions the upper side of the cab 10 is fixed to an upper edge portion of the back panel 12. Both edge portions of the back panel 12 in the vehicle width direction are fixed to the rear edge portions of the outer panel 19 and the rear edge portions of the inner panel 20 on both sides of the cab 10 in the vehicle width direction. Both end edges of the back panel 12 in the vehicle width direction, the rear end edge of the outer panel 19, and the rear end edge of the inner panel 20 project rearward of the cab 10 and extend in the up-down direction, and overlap each other in the vehicle width direction. Are joined together in a closed state.

  The left and right beads 17 extend vertically along the top and bottom of the back panel 12 in a state of protruding toward one side in the front-rear direction (rear side in the present embodiment), and both sides of the back panel 12 in the vehicle width direction. Are provided symmetrically to the left and right to reinforce the back panel 12. Each bead 17 has left and right inclined surface portions 17a and 17b and a rear surface portion 17c, and is arranged at substantially the same position in the vehicle width direction as the left and right supported regions 25 of the rear cab mount rail 11. Specifically, the center line of the bead 17 in the vehicle width direction is substantially the same position in the vehicle width direction as the center line of the mount bracket fixing portion 15 of the rear cab mount rail 11 in the vehicle width direction (two-dot chain line in FIG. 2). (Position indicated by 9). The left and right slanted surface portions 17a and 17b of the bead 17 are slanted and extend in a rearward approaching direction. The rear surface portion 17c of the bead 17 intersects with the front-rear direction and connects the rear end edges of the left and right inclined surface portions 17a and 17b.

  The left and right reinforcements 13 are each formed in a hat shape in cross section having left and right fixed surface portions 13a, 13b, left and right inclined surface portions (protruding portions) 13c, 13d, and a front surface portion (protruding portion) 13e. The left and right reinforcements 13 are arranged at positions on the other surface 21 (front surface 21 in the present embodiment) of the back panel 12 in the front-rear direction from the front side of the left and right beads 17, and are arranged in front of the back panel 12. It is fixed to 21 and extends vertically. That is, like the left and right beads 17 of the back panel 12, the left and right reinforcements 13 have a center line in the vehicle width direction that is the same as the center line in the vehicle width direction of the mount bracket fixing portion 15 of the rear cab mount rail 11. By being arranged at substantially the same position in the width direction (position shown by a chain double-dashed line 9 in FIG. 2), the left and right supported regions 25 of the rear cab mount rail 11 are substantially at the same position in the vehicle width direction as a whole. Will be placed. The upper ends of the left and right reinforcements 13 are arranged at the upper edge portion of the back panel 12. The roof back rail 16 (see FIG. 4) is fixed to the back panel 12 so as to cover the upper ends of the left and right reinforcements 13 from the front. The lower ends of the left and right reinforcements 13 are close to the upper surface of the mount bracket fixing portion 15 of the rear cab mount rail 11. The left and right fixing surface portions 13a and 13b are joined to the regions of the front surface 21 of the back panel 12 located on both the left and right sides of the bead 17. The left and right inclined surface portions 13c, 13d extend forward from the edge portions of the left and right fixed surface portions 13a, 13b on the bead 17 side in the direction of approaching each other. The front surface portion 13e faces the rear surface portion 17c at a position spaced forward from the rear surface portion 17c of the bead 17, intersects with the front-rear direction, and connects the front end edges of the left and right inclined surface portions 13c and 13d. That is, the left and right inclined surface portions 13c and 13d and the front surface portion 13e project to the other side in the front-rear direction (the front side in this embodiment) between the left and right fixed surface portions 13a and 13b. The front surface portion 13e of the reinforcement 13 is arranged at substantially the same position in the front-rear direction as the rear end edge of the mount bracket fixing portion 15 of the rear end edge 27 of the upper plate portion 11b of the rear cab mount rail 11. An L-shaped bracket 23 described later is fixed to a lower end portion 28 of the front surface portion 13e of the reinforcement 13. The left and right reinforcements 13 are fixed to the back panel 12 and define a closed space 22 having a substantially hexagonal cross section between the reinforcements 13 and the beads 17 of the back panel 12 to reinforce the back panel 12. The closed space 22 between the reinforcement 13 and the back panel 12 extends in the vertical direction over substantially the entire area of the back panel 12 in the vertical direction. In the present invention, the closed space 22 extending over substantially the entire area of the back panel 12 in the vertical direction means not only a state in which the closed space 22 continuously extends from the upper edge to the lower edge of the back panel 12, but also the back space. This is a concept including a state in which the panel 12 extends over the entire area in the up-down direction of the intermediate portion excluding the lower end edge joined to the rear cab mount rail 11 and the upper end edge joined to the roof back rail 16.

  As shown in FIGS. 4 and 5, the bracket 23 integrally includes a vertical plate portion 23a that extends in the vertical direction in a vehicle side view, and a front plate portion 23b that bends from the lower end of the vertical plate portion 23a and extends forward. Have. The upper end of the vertical plate portion 23 a is fixed to the front surface 24 of the front surface portion 13 e of the reinforcement 13, and the lower end of the vertical plate portion 23 a contacts the upper surface of the mount bracket fixing portion 15. The front plate portion 23b extends along the upper surface of the mount bracket fixing portion 15 and is fixed to the mount bracket fixing portion 15 by welding or the like. That is, the lower end portion 28 of the reinforcement 13 is fixed to the mount bracket fixing portion 15 of the supported region 25 of the rear cab mount rail 11 via the bracket 23. The shape of the bracket 23 is not limited to the substantially L shape, and if one end side is fixed to the lower end portion 28 of the reinforcement 13 and the other end side is fixed to the supported region 25 of the rear cab mount rail 11, another The shape may be.

  In the cab 10 configured as described above, the left and right beads 17 of the back panel 12 protrude rearward, and the left and right inclined surface portions 13c and 13d and the front surface portion 13e of the reinforcement 13 protrude frontward. It is possible to secure a large cross-sectional area of the closed space 22 between the bead 17 of the back panel 12 and the reinforcement 13 as compared with the case where one of 12 and the reinforcement 13 is flat. Therefore, it is possible to sufficiently secure the strength of the back panel 12 against the vertical load applied to the cab 10.

  Further, since the closed space 22 between the bead 17 and the reinforcement 13 of the back panel 12 extends over substantially the entire area of the back panel 12 in the vertical direction, the back panel 12 is subjected to the vertical load applied to the cab 10. Sufficient strength can be secured.

  Therefore, it is possible to sufficiently secure the strength of the cab rear surface portion 7 against the load input from the vertical direction.

  Further, the mount bracket fixing portion 15 of the rear cab mount rail 11 is supported by the vehicle body frame 4 from below, and the lower end portion 28 of the reinforcement 13 is supported by the bracket 23 with respect to the supported area 25 of the rear cab mount rail 11. Fixed. Therefore, the load applied to the cab 10 from above is transmitted from the bead 17 and the reinforcement 13 to the vehicle body frame 4 side through the supported region 25 of the rear cab mount rail 11, and the load from below the cab 10 is transmitted. Is transmitted to the bead 17 and the reinforcement 13 side via the supported region 25 of the rear cab mount rail 11. In this way, the load from above (bead 17 and reinforcement 13 side) and the load from below (body frame 4 side) are efficiently transmitted in the vertical direction via the supported region 25 of the rear cab mount rail 11. Therefore, it is possible to prevent stress concentration on a predetermined portion of the cab rear surface portion 7, and to secure the strength of the cab rear surface portion 7 against the vertical load applied to the cab 10.

  Further, since the load from above and the load from below are input to the same region (supported region 25) of the rear cab mount rail 11 in the vehicle width direction, the bending deformation of the rear cab mount rail 11 can be prevented. The strength of the cab rear surface portion 7 can be ensured.

  Although the rear cab mount rail 11 formed by bending the rear end side of the floor panel 14 so as to project upward is provided in the present embodiment, the present invention is not limited to this, and the rear end of the cab 10 is not limited to this. Other configurations may be used as long as they are rear cab mount rails that extend in the vehicle width direction at the lower portion and are supported by the vehicle body frame 4 from below. For example, the rear cab mount rail may be a tubular body that is fixed to the rear edge of the floor panel 14 and extends in the vehicle width direction, such as a rectangular cross section.

  Further, in the present embodiment, by fixing the rear cab mount bracket 6 to the mount bracket fixing portion 15 of the rear cab mount rail 11, the mount bracket fixing portion 15 is downwardly moved to the rear cab mount 5 via the rear cab mount bracket 6. Supported by the mount bracket fixing portion 15 functioned as a supported surface portion, but is not limited to this. For example, a predetermined region of the rear cab mount rail 11 may be directly supported from below by the cushion rubber of the rear cab mount 5, and the predetermined region may function as the supported surface portion. In this case, the portion of the rear cab mount rail 11 that is in contact with the cushion rubber of the rear cab mount 5 is the supported surface portion, and the length of the predetermined region in the vehicle width direction includes the supported surface portion. Is the length in the vehicle width direction.

  Further, in the present embodiment, the front plate portion 23b of the bracket 23 is fixed to the mount bracket fixing portion 15 of the rear cab mount rail 11, but the present invention is not limited to this. For example, another portion of the supported region 25. It may be fixed to the front region 26 or the rear region.

  Further, in the present embodiment, the lower end portion 28 of the reinforcement 13 is fixed to the supported region 25 of the rear cab mount rail 11 via the bracket 23. However, without providing the bracket 23, the rear cab mount rail 11 is not provided. It may be directly fixed to the supported region 25 by welding or the like.

  The cross-sectional shape of the closed space 22 defined between the bead 17 of the back panel 12 and the reinforcement 13 is not limited to the hexagonal shape, and may be, for example, a rectangular shape or a circular shape. .

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

  For example, in the above-described embodiment, the bead 17 of the back panel 12 is projected rearward and the reinforcement 13 is projected forward, but the bead 17 of the back panel 12 is forward (one side in the front-rear direction). In addition to projecting, the reinforcement 13 may be projected rearward (the other side in the front-rear direction). In this case, the lower end of the bead 17 of the back panel 12 may be fixed to the supported region 25 of the rear cab mount rail 11.

  Further, in the above embodiment, the rear surface structure of the cab according to the present invention is applied to the cab 10 of the truck 1 having a normal roof height, but the present invention is not limited to this, and a cab of a high roof type truck, It may be applied to a cab such as a tractor that pulls a trailer.

1: Track 4: Body frame 7: Cab rear surface 10: Cab 11: Rear cab mount rail (rear mount rail)
12: Back panel 13: Reinforce 13a, 13b: Left and right fixed surface portions 13c and 13d of the reinforce: Left and right inclined surface portions (protruding portions) of the reinforce
13e: Front part of the reinforcement (projection part)
15: Mount bracket fixing part (supported surface part)
17: Bead 21: Front of Back Panel 22: Closed Space 25: Supported Area of Rear Cab Mount Rail 28: Lower End of Reinforce

Claims (1)

A rear surface structure of a cab supported from below by a body frame,
A back panel having a bead extending in the up-down direction in a state of protruding to the rear side, and standing up by intersecting the front-rear direction at the rear end of the cab;
Protruding portion facing the left and right fixing surface which is fixed to the left and right sides of the region of the bead of the front, the bead projecting in front side in between the right and left fixing surface from the front side in the back panel And a reinforcement that extends in the up-down direction and defines a closed space between the beads of the back panel,
A front plate part, an upper plate part that is bent from an upper end edge of the front plate part and extends rearward, and a rear plate part that is bent from a rear end edge of the upper plate part and extends downward, With a rear mount rail extending in the vehicle width direction at the lower rear end ,
The closed space extends over substantially the entire area of the back panel in the vertical direction ,
The upper plate portion of the rear mount rail has a supported surface portion that is supported by the vehicle body frame from below,
A lower edge portion of the back panel is joined to the rear plate portion of the rear mount rail,
A rear surface structure of the cab , wherein a lower end portion of the reinforcement is connected to the supported surface portion of the upper plate portion of the rear mount rail .

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