JP7257003B1 - Vehicle cab rear structure - Google Patents

Abstract

An object of the present invention is to secure the strength of a rearwardly extending portion of a cab in a vehicle in which the floor surface of the rearwardly extending portion of the cab that extends rearward of the vehicle from a cab supported portion is supported by a cab floor panel in a cantilever manner.
An extension floor panel (17) is cantilever-supported by a cab floor panel (15) and extends rearward of the vehicle from a cab supported portion to form a floor surface of a rear extension portion of the cab. The first reinforcing member 30 is fixed to the lower surface of the vehicle front side region 17A of the extended floor panel 17, the second reinforcing member 40 is fixed to the lower surface of the vehicle rear side region 17B of the extended floor panel 17, and the first reinforcing member 30 is fixed. The front end of the is secured to the cab floor panel 15 . At the rear end of the first reinforcing member 30, one of the first member main body 31 and the second member main body 41 is inserted inside the other, and the left and right first member flange portions 32 overlap the left and right second member flange portions 42. It is fixed to the front end of the second reinforcing member 40 in this state.
[Selection drawing] Fig. 3

Description

The present disclosure relates to a vehicle cab rear structure.

A rear supported part of the cab (a cab supported part) is provided below the rear end of the cab floor panel that defines the lower part of the passenger compartment, and the cab supported part is supported from below by a cab mount on the vehicle body side. A vehicle cab rear structure is known (for example, Patent Document 1).

JP 2008-100655 A

In a vehicle in which the rear end of the seat (for example, the driver's seat) is close to the rear end of the passenger compartment, the cab is moved rearward in order to provide a reclining space behind the seat that allows the seat back to be tilted backward (reclined). Extension is possible. The reclining space can also be used as a space for storing luggage.

When extending the cab rearward, in order to minimize the design changes on the cab side and the vehicle body side, the position of the cab supported part is not changed, and it is supported in a cantilever manner on the cab floor panel so that the cab is supported from the cab supported part. It is preferable that an extended floor panel extending rearward of the vehicle is provided, and the floor surface of the rearwardly extended portion of the cab behind the cab supported portion is constituted by the extended floor panel.

However, since the extension floor panel is cantilevered on the cab floor panel, it is difficult to ensure the strength of the rearward extension of the cab.

Accordingly, the present disclosure is directed to ensuring the strength of the rearwardly extending portion of the cab in a vehicle in which the floor surface of the rearwardly extending portion of the cab that extends toward the vehicle rearward from the cab supported portion is cantilevered on the cab floor panel. With the goal.

In order to achieve the above object, the present disclosure provides a cab supported portion that is supported from below by a cab floor panel rear end portion of a cab floor panel and is supported from below by a cab mount on the vehicle body side. A cab rear portion structure for a vehicle extending rearward of the vehicle from a support portion, comprising an extended floor panel, a first reinforcing member, and a second reinforcing member. The extension floor panel is supported in a cantilever manner by the cab floor panel, extends rearward of the vehicle from the cab supported portion, and constitutes the floor surface of the rear extension portion of the cab.

The first reinforcing member has a first member main body and left and right first member flange portions. The first member main body has a shape in which a cut surface along the vehicle width direction opens upward, and extends in the vehicle front-rear direction along the lower surface of the vehicle front side region of the extension floor panel. The left and right first member flange portions extend in opposite directions from left and right upper edge portions on both sides in the vehicle width direction of the first member main body, and are fixed to overlap the lower surface of the vehicle front side region of the extended floor panel from below. The first member main body forms a closed cross section with the vehicle front side region of the extended floor panel.

The second reinforcing member has a second member main body and left and right second member flange portions. The second member main body has a shape in which a cut surface along the vehicle width direction opens upward, and extends in the vehicle front-rear direction along the lower surface of the vehicle rear side region of the extension floor panel. The left and right second member flange portions extend in opposite directions from left and right upper end edges on both sides in the vehicle width direction of the second member main body, and are fixed to overlap the lower surface of the vehicle rear region of the extended floor panel from below. The second member main body forms a closed cross section with the vehicle rear region of the extended floor panel.

A front end of the first reinforcing member is secured to the cab floor panel. At the rear end of the first reinforcing member, one of the first member main body and the second member main body is inserted inside the other, and the left and right first member flange portions overlap the left and right second member flange portions, It is secured to the front end of the second reinforcing member.

In the above configuration, the load (for example, the downward load) input to the extended floor panel is efficiently transferred from the second reinforcing member and the first reinforcing member to the cab floor panel and the cab supported portion to the cab mount on the vehicle body side. can be transmitted. Also, the surface rigidity of the extended floor panel can be increased by the first reinforcing member and the second reinforcing member. Therefore, in a vehicle in which the floor surface of the rearwardly extending portion of the cab extending rearward of the vehicle from the cab supported portion is cantilevered by the cab floor panel, the strength of the rearwardly extending portion of the cab can be ensured.

The rear end portion of the first reinforcing member is provided with the second reinforcing member in a state in which the second member main body is inserted inside the first member main body and the left and right first member flange portions overlap the left and right second member flange portions from below. It may be secured to the front end of the member.

In the above configuration, when the extended floor panel is assembled to the cab floor panel, the front end of the first reinforcing member is fixed to the cab floor panel, and the second reinforcing member is fixed to the lower surface of the vehicle rear side region of the extended floor panel. , the extended floor panel is lowered from above with respect to the cab floor panel, and the front end of the second reinforcing member is attached to the rear end of the first reinforcing member from above so that the second member main body enters the inside of the first member main body. overlap. By overlaying the second reinforcing member on the first reinforcing member, the extension floor panel can be positioned with respect to the cab floor panel, thereby improving assembly workability.

Further, the rear end portion of the first reinforcing member is configured such that the first member main body is inserted inside the second member main body, and the left and right second member flange portions overlap the left and right first member flange portions from below. 2 may be secured to the front end of the reinforcing member.

In the above configuration, when the front end of the first reinforcing member is fixed to the cab floor panel, the second reinforcing member is fixed to the lower surface of the vehicle rear side region of the extended floor panel, and then the extended floor panel is assembled to the cab floor panel. For example, the second member main body may be shaped so that its front end is open. When assembling the extended floor panel to the cab floor panel, the extended floor panel is moved forward of the vehicle with respect to the cab floor panel so that the rear end of the first member body is inserted through the opening at the front end of the second member body. This allows the extension floor panel to be assembled to the cab floor panel. By inserting the rear end of the first member main body through the opening at the front end of the second member main body, the extension floor panel can be positioned with respect to the cab floor panel, thereby improving assembly workability.

According to the cab rear portion structure of the present disclosure, in a vehicle in which the floor surface of the rearwardly extending portion of the cab extending toward the rear of the vehicle from the cab supported portion is cantilevered on the cab floor panel, the strength of the rearwardly extending portion of the cab is can be ensured.

1 is a side view schematically showing a vehicle provided with a cab rear portion structure according to one embodiment of the present invention; FIG. It is the bottom view which looked at the cab which concerns on this embodiment from the downward direction. FIG. 3 is a perspective view of the cab of FIG. 2 as viewed obliquely from below; FIG. 3 is a sectional view taken along line IV-IV in FIG. 2; (a) is a cross-sectional view taken along line Va-Va in FIG. 4, and (b) is a cross-sectional view taken along line Vb-Vb in FIG. FIG. 4 is an exploded perspective view of FIG. 3;

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, and the left-right direction means the left-right direction when the vehicle faces forward. In the drawings, the front and rear arrows indicate the vehicle front-rear direction, the up and down arrows indicate the vertical direction, and the left and right arrows indicate the vehicle width direction. Also, the direction of each member is the direction when it is assembled to the vehicle.

As shown in FIG. 1, the cab rear portion structure according to the present invention is applied, for example, to a cab-over type vehicle 1 in which a cab 2 is arranged generally above an engine (not shown). The vehicle 1 includes a vehicle body frame 3 extending in the vehicle longitudinal direction on both sides in the vehicle width direction, a cab 2 supported by the vehicle body frame 3 so as to be tiltable, and a rear portion of the vehicle body frame 3 supported from below behind the cab 2. and a loading platform 4. The vehicle 1 of the present embodiment is a flat-body truck with an open loading platform 4 above.

The cab 2 is formed in a box shape by a cab front portion 5, left and right cab side portions 6, a cab rear portion 7, a cab top portion 8, and a cab bottom portion 9, and a compartment 10 is defined therein. A front lower portion of the cab 2 is rotatably supported by the front end portion of the vehicle body frame 3 via a cab front mount 11 . Left and right cab-supported portions 12 are provided on both sides in the vehicle width direction of the rear lower portion of the cab 2 , and the cab-supported portions 12 are supported from below by cab mounts 13 on the body frame 3 side.

The cab 2 of this embodiment has a rear extension portion 14 that extends rearward of the vehicle from the cab supported portion 12 . The rear extension portion 14 of the cab 2 expands the cabin 10 rearward of the vehicle beyond the cab supported portion 12 .

As shown in FIGS. 1 and 2 , the cab lower surface portion 9 includes a cab floor panel 15 , left and right floor underframes 16 , and an extension floor panel 17 . The cab floor panel 15 includes a front floor portion 18, an intermediate floor portion 19 extending rearward and obliquely upward from the rear edge of the front floor portion 18, and a rear floor portion 20 extending rearward of the vehicle from the rear edge of the intermediate floor portion 19. and a floor rear vertical surface portion 21 that rises upward along the vehicle width direction from the rear edge portion of the floor rear portion 20 .

The left and right floor underframes 16 are spaced apart in the vehicle width direction, extend in the vehicle front-rear direction, and are fixed to the lower surface of the cab floor panel 15 . At the rear end portions of the left and right floor underframes 16, the cab-supported portions 12 are provided. That is, the cab floor supported portion 12 is provided below the rear end portion of the cab floor panel 15 .

The extension floor panel 17 is arranged above and behind the floor rear portion 20 of the cab floor panel 15, and its front end portion is fixed to the floor rear vertical surface portion 21 of the cab floor panel 15, so that the extension floor panel 17 is attached to the cab floor panel 15 at one side. supported by holding. The extension floor panel 17 extends toward the rear of the vehicle from the cab 2 supported portion 12 and constitutes the floor surface of the rear extension portion 14 of the cab 2 .

The rear space 22 of the passenger compartment 10 expanded by the rear extension 14 of the cab 2 allows the seat back 24 of the seat 23 attached to the rear floor 20 of the cab floor panel 15 to tilt rearward (reclinable). do) becomes a reclining space. In addition, the rear space 22 of the passenger compartment 10 can also be used as a space for placing luggage 25 on the extended floor panel 17 .

The upper surface portion of the rear extension portion 14 of the cab 2 and the lateral side portions on both sides in the vehicle width direction are formed by the rear portion of the cab upper surface portion 8 and the rear portions of the left and right cab side portions 6 . A rear surface portion of the rear extension portion 14 is constituted by a cab rear surface portion 7 which extends upward from a rear end edge portion of the extension floor panel 17 . When manufacturing a vehicle in which the cab does not have the rear extension 14, the cab rear surface 7 is not provided with the extension floor panel 17 and the cab upper surface 8 and the left and right cab side surfaces 6 are not extended rearward of the vehicle. It is arranged to extend upward from the upper end portion of the floor rear vertical surface portion 21 of the cab floor panel 15 . Since the vehicle 1 with the rear extension part 14 and the vehicle without the rear extension part 14 can be manufactured without changing the position of the cab supported part 12, design changes on the cab side and the vehicle body side can be kept to a minimum.

The space below the rear extension portion 14 of the cab 2 (below the extended floor panel 17) is used as a cargo space on the cargo bed 4 side, and the floor surface 26 of the cargo bed 4 extends forward of the vehicle from the cab rear surface portion 7 (FIG. 1). reference).

As shown in FIG. 3, the floor rear vertical surface portion 21 of the cab floor panel 15 includes a floor rear end upper surface portion 27 that extends from the upper edge portion of the floor rear vertical surface portion 21 to the rear of the vehicle by bending, and a floor rear end upper surface portion. A floor rear end upper surface flange portion 28 is formed that bends and extends downward from the rear end edge portion of the floor 27 . The front end portion of the extended floor panel 17 is placed on the floor rear end upper surface portion 27 and overlaps from above, and is fixed to the floor rear end upper surface portion 27 by welding or the like.

As shown in FIGS. 2 to 6 , left and right first reinforcing members 30 and left and right second reinforcing members 40 are fixed to the lower surface of the extended floor panel 17 . The left and right first reinforcing members 30 are spaced apart in the vehicle width direction and extend in the vehicle front-rear direction along the lower surface of the vehicle front region 17A of the extended floor panel 17 . The left and right second reinforcing members 40 are spaced apart in the vehicle width direction and extend in the vehicle front-rear direction along the lower surface of the vehicle rear side region 17B of the extended floor panel 17 . On both the left and right sides, the first reinforcing member 30 and the second reinforcing member 40 are arranged linearly in the vehicle front-rear direction with the rear end portion of the first reinforcing member 30 and the front end portion of the second reinforcing member 40 overlapping each other. continuous to The left first reinforcing member 30 and the second reinforcing member 40 are arranged on the vehicle width direction inner side of the left cabriel supported portion 12, and the right first reinforcing member 30 and the second reinforcing member 40 are arranged on the right cab. It is arranged inside the supported portion 12 in the vehicle width direction.

The first reinforcing member 30 has a first member main body 31 , left and right first member flange portions 32 , and a front end flange portion 36 . The first member main body 31 has a U shape whose cut surface along the vehicle width direction opens upward. Extending right and left first side plate portions 34 are integrally provided. The left and right first member flange portions 32 extend from left and right upper edge portions on both sides in the vehicle width direction of the first member main body 31 while being bent in opposite directions. That is, the left first member flange portion 32 bends and extends leftward from the upper edge portion of the left first side plate portion 34 , and the right first member flange portion 32 extends from the upper end of the right first side plate portion 34 . It bends and extends from the edge to the right. The left and right first member flange portions 32 overlap the lower surface of the vehicle front side region 17A of the extended floor panel 17 from below and are fixed by welding or the like. The first member main body 31 forms a closed cross section 35 with the vehicle front side region 17A of the extended floor panel 17 .

Left and right rectangular cutouts 29 through which the front ends of the left and right first reinforcing members 30 are inserted are formed in the floor rear end upper face flange portion 28 of the cab floor panel 15 . The front end flange portion 36 of the first reinforcing member 30 bends and extends from the front end edge portion of the first member main body 31 and is fixed to the floor rear vertical surface portion 21 of the cab floor panel 15 from the rear of the vehicle by overlap welding or the like. That is, the front end portion of the first reinforcing member 30 is fixed to the cab floor panel 15 .

The second reinforcing member 40 has a second member main body 41 and left and right second member flange portions 42 .
The second member main body 41 has a U shape whose cut surface along the vehicle width direction opens upward. Extending left and right second side plate portions 44 are integrally provided. The left and right second member flange portions 42 extend from left and right upper edge portions on both sides in the vehicle width direction of the second member main body 41 while being bent in opposite directions. That is, the left second member flange portion 42 bends and extends leftward from the upper edge of the left second side plate portion 44 , and the right second member flange portion 42 extends from the upper end of the right second side plate portion 44 . It bends and extends from the edge to the right. The left and right second member flange portions 42 overlap the lower surface of the vehicle rear region 17B of the extended floor panel 17 from below and are fixed by welding or the like. The second member main body 41 forms a closed cross section 45 with the vehicle rear side region 17B of the extended floor panel 17 .

The outer shape of the front end of the second member main body 41 is slightly smaller than the inner shape of the rear end of the first member main body 31 . At the rear end of the first reinforcing member 30 , the second member main body 41 is inserted inside the first member main body 31 , and the rear ends of the left and right first member flanges 32 are the front ends of the left and right second member flanges 42 . It is fixed to the front end portion of the second reinforcing member 40 by welding or the like while being overlapped with the portion from below. In this embodiment, the first bottom plate portion 33 and the second bottom plate portion 43 are vertically overlapped and fixed, and the extension floor panel 17, the first member flange portion 32, and the second member flange portion 42 are vertically overlapped and fixed. be done.

According to this embodiment, the load (for example, downward load) input to the extended floor panel 17 is transferred from the second reinforcing member 40 and the first reinforcing member 30 to the vehicle body via the cab floor panel 15 and the cab supported portion 12 . It can be efficiently transmitted to the cab rear mount 13 of the frame 3. Also, the surface rigidity of the extended floor panel 17 can be increased by the first reinforcing member 30 and the second reinforcing member 40 . Therefore, in the vehicle 1 in which the floor surface of the rear extension portion 14 of the cab 2 extending rearward of the vehicle from the cab supported portion 12 is supported by the cab floor panel 15 in a cantilever manner, the strength of the rear extension portion 14 of the cab 2 is increased. can be secured.

When the extended floor panel 17 is assembled to the cab floor panel 15, the front end flange portion 36 of the first reinforcing member 30 is fixed to the floor rear vertical surface portion 21 of the cab floor panel 15, and the vehicle rear side region 17B of the extended floor panel 17 is fixed. After fixing the second reinforcing member 40 to the lower surface, the extended floor panel 17 is lowered from above with respect to the cab floor panel 15, and the first reinforcing member is installed so that the second member main body 41 enters the inside of the first member main body 31. The front end of the second reinforcing member 40 is superimposed on the rear end of the second reinforcing member 30 from above. By overlaying the second reinforcing member 40 on the first reinforcing member 30, the extension floor panel 17 can be positioned with respect to the cab floor panel 15, thereby improving assembly workability.

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 case of applying the present invention to the tiltable cab 2 has been described, but it is also possible to apply the present invention to a non-tilting cab. Also, the case where two sets of the first reinforcing member 30 and the second reinforcing member 40 are provided (one set on each side) has been described, but the number of sets of the first reinforcing member 30 and the second reinforcing member 40 is one set. There may be, or there may be three or more sets.

Further, in the above embodiment, the rear end portion of the first reinforcing member 30 and the front end portion of the second reinforcing member 40 are configured so that the second member main body 41 enters inside the first member main body 31. The member body may be configured to enter the inside of the second member body.

INDUSTRIAL APPLICABILITY The present invention can be widely applied to vehicles in which a cab is supported by a vehicle body frame.

1: Vehicle 2: Cab 3: Body Frame 4: Bed 5: Cab Front 6: Cab Side 7: Cab Rear 8: Cab Top 9: Cab Bottom 10: Cabin 11: Cab Front Mount 12: Cabria Supported Part 13: Cabria Mount 14: Rear Extension Part 15: Cab Floor Panel 16: Floor Underframe 17: Extension Floor Panel 17A: Vehicle Front Side Area of Extension Floor Panel 17B: Vehicle Rear Side Area of Extension Floor Panel 18: Floor Front part 19: Middle floor part 20: Rear rear part of floor 21: Rear vertical surface part of floor 22: Rear space of vehicle compartment 23: Seat 24: Seat back 25: Cargo 26: Floor surface of loading platform 27: Upper rear end of floor part 28: Floor Rear end upper flange portion 29: Notch 30: First reinforcing member 31: First member main body 32: First member flange portion 33: First bottom plate portion 34: First side plate portion 35, 45: Closed section 36: Front end flange Part 40: Second reinforcing member 41: Second member body 42: Second member flange portion 43: Second bottom plate portion 44: Second side plate portion

Claims (2)

A cab of a vehicle having a cab supported portion supported from below by a cab mount on the vehicle body side below a rear end portion of a cab floor panel, and a rear extension portion of the cab extending further to the rear of the vehicle than the cab supported portion. a rear structure,
an extension floor panel that is cantilever-supported by the cab floor panel, extends rearward of the vehicle from the cab supported portion, and forms a floor surface of the rear extension portion of the cab;
a first member main body having a shape in which a cross section along the vehicle width direction opens upward and extending in the vehicle front-rear direction along the lower surface of the vehicle front side region of the extension floor panel; and the first member main body in the vehicle width direction. and left and right first member flange portions extending in opposite directions from left and right upper end edges on both sides, and the first member flange portions overlap the lower surface of the vehicle front side region of the extension floor panel from below. a first reinforcing member fixedly attached to form a closed cross-section between the first member main body and the vehicle front side region of the extension floor panel;
A second member main body having a shape in which a cut surface along the vehicle width direction opens upward and extends in the vehicle front-rear direction along the lower surface of the vehicle rear side region of the extension floor panel, and the vehicle width of the second member main body. left and right second member flange portions extending in opposite directions from left and right upper end edges on both sides of the direction, and the second member flange portions extend from below to the lower surface of the vehicle rear side region of the extension floor panel. a second reinforcing member that overlaps and is fixed, and the second member main body forms a closed cross section between the vehicle rear region of the extension floor panel;
a front end portion of the first reinforcing member is fixed to the cab floor panel;
At the rear end of the first reinforcing member, one of the first member main body and the second member main body is inserted inside the other, and the left and right first member flange portions overlap the left and right second member flange portions. The cab rear portion structure for a vehicle, wherein the cab portion is fixed to the front end portion of the second reinforcing member in a state in which the second reinforcing member is in a closed state. The vehicle cab rear part structure according to claim 1,
The rear end portion of the first reinforcing member is in a state in which the second member main body is inserted inside the first member main body, and the left and right first member flange portions overlap the left and right second member flange portions from below. and is fixed to the front end of the second reinforcing member.

Images