JP5679313B2 - Cab front end lower structure - Google Patents

Description

  The present invention relates to a front end lower structure of a cab that supports a front end lower portion of a cab having a dash panel and a floor panel by being coupled to a cab mount provided on a vehicle body frame.

  Japanese Patent Application Laid-Open No. 2002-96767 describes a cabbutyl device for a cab-over type vehicle. In this cabylt device, a pair of left and right main sills that extend in the vehicle longitudinal direction and constitute the strength member of the cab are fixed to the lower side of the cab floor, and a cab side bracket is fixed to the lower part of the front end of the main sill. Yes. The cab-side bracket is fixed to a cab mount bracket fixed to the front end portion of the side rail of the vehicle body frame with a bolt, and the cab is rotatably supported with respect to the vehicle by the cab-side bracket and the cab mount bracket. .

JP 2002-96767 A

  In a vehicle including the cabylt device disclosed in Japanese Patent Application Laid-Open No. 2002-96767, the cab-side bracket of the main sill is fixed to the cab mount bracket of the vehicle body frame so that the cab and the vehicle body frame are coupled, and the cab is supported by the vehicle body frame. ing. For this reason, input from the vehicle body frame to the cab is input only to the main sill via the cab mount bracket and the cab side bracket. Therefore, in order to secure the rigidity of the main sill, which is the coupling part of the cab and the body frame on the cab side, the thickness of the main sill must be set relatively thick, and the weight of the vehicle increases as the thickness increases. there's a possibility that.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a cab front end lower structure that can sufficiently secure the rigidity of a coupling portion of a cab and a body frame on the cab side while suppressing the weight of the vehicle.

  In order to achieve the above object, the present invention is a front end lower structure of a cab that supports a front end lower portion of a cab having a dash panel and a floor panel by being coupled to a cab mount provided on a vehicle body frame. And a dash panel extension.

  The floor recess is bent at the upper part of the cab mount in the front end of the floor panel and is recessed downward. The dash panel extension is a vertical plate portion extending downward from the front portion of the floor recess portion of the lower end edge of the dash panel, and a horizontal plate portion that is bent backward from the lower end of the vertical plate portion and overlaps the floor recess portion. Have

  The floor recess and the horizontal plate portion of the dash panel extension have a bolt insertion hole penetrating both, and are coupled to the cab mount by a bolt that passes through the bolt insertion hole.

  According to the said structure, a floor recessed part and the horizontal-plate part of a dash panel extension part overlap on the upper and lower sides, and it couple | bonds with a cab mount by inserting a volt | bolt through the bolt insertion hole which penetrates both. For this reason, input from the vehicle body frame is distributed and input to the floor panel and the dash panel via the cab mount, the floor recess, and the horizontal plate portion of the dash panel extension. That is, the input from the vehicle body frame can be shared and supported by the floor panel and the dash panel, and sufficient rigidity can be secured at the coupling portion of the cab and the vehicle body frame on the cab side. Therefore, it is not necessary to increase the plate thickness of the cab-side member at the coupling portion between the cab and the vehicle body frame, and the weight of the vehicle accompanying the increase in the plate thickness can be suppressed.

  The vertical plate portion of the dash panel extension may be joined to the front end of the floor recess to close the front of the floor recess.

  According to the said structure, the rigidity of the junction part of the vertical board part of a dash panel extension part and the front end of a floor recessed part can be improved. In addition, since it is not necessary to provide a member for closing the front of the floor recess, the number of parts and the number of assembly steps can be reduced.

  ADVANTAGE OF THE INVENTION According to this invention, the rigidity of the coupling part by the side of the cab of a cab and a vehicle body frame can fully be ensured, suppressing the weight increase of a vehicle.

It is a principal part perspective view of the vehicle concerning one Embodiment of this invention. It is a principal part disassembled perspective view of FIG. It is a principal part disassembled perspective view of FIG. It is the IV-IV sectional view taken on the line of FIG. It is the VV sectional view taken on the line of FIG. It is the VI-VI sectional view taken on the line of FIG. It is the VII-VII sectional view taken on the line of FIG. It is the VII-VII sectional view taken on the line of the modification of the vehicle of FIG.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. In the drawing, the arrow FR indicates the front of the vehicle, the arrow UP indicates the upper side, and the arrow IN indicates the inner side in the vehicle width direction. In the following description, front and rear means front and rear of the vehicle, and left and right mean left and right in a state of facing the front of the vehicle.

  As shown in FIG. 1, the cab front end lower structure 1 according to the present embodiment has a front end lower portion of a cab 3 having a dash panel 19 and a floor panel 21 coupled to a cab mount 5 provided on a vehicle body frame 4. And provided at the lower part of the front end of the cab 3 to be supported.

  The vehicle 2 is a cab-over type truck in which an engine room 44 is located below the cab 3. The cab 3 is supported by a cab mount 5 attached to the front end portion of the vehicle body frame 4 so as to be tiltable forward.

  The vehicle body frame 4 includes left and right main beams 6 extending in parallel along the front-rear direction, a plurality of cross members 7 and a cab mount 5. The left and right main beams 6 are connected to each other by a plurality of orthogonal cross members 7. A traveling axle (not shown) is provided near the front end and the rear end of the body frame 4. The traveling wheels 8 are rotatably supported at both ends of the traveling axle in the vehicle width direction.

  As shown in FIGS. 1 and 2, the cab mount 5 includes a pair of cab mount brackets 9 erected from the vehicle body frame 4 at a predetermined distance in the vehicle width direction, a substantially cylindrical mount tube 10, and a mount tube. 10, a vehicle body frame side fastening portion 11 fixed to the outer peripheral surface, a torsion bar (not shown) that passes through the mount tube 10, and an anchor arm (not shown). The cab mount bracket 9 has a substantially cylindrical mount rubber (not shown) made of an elastic member inside the upper part. The mount tube 10 is pivotally supported on the cab mount bracket 9 via a mount rubber. One end of the torsion bar is fixed to the mount tube 10 and the other end extends from the mount tube 10 and is fixed to the anchor arm. The anchor arm is fixed to the cab mount bracket 9.

  The vehicle body frame side fastening portion 11 includes a front plate portion 12 extending obliquely downward from a front end side of the vehicle 2 and a rear plate portion 13 bent substantially horizontally from the rear end portion of the front plate portion 12 and extending rearward. Have. The front plate portion 12 is provided with three front plate bolt insertion holes 12c penetrating in the vertical direction at predetermined intervals. In addition, a pair of front side wall portions 12a extending downward and bent from both end portions are formed at both end portions of the front plate portion 12 in the vehicle width direction. An insertion hole 12b (see FIG. 7) through which the mount tube 10 is inserted is formed substantially at the center of the front side wall portion 12a. When the mount tube 10 is inserted into the insertion hole 12b, the vehicle body frame side fastening portion 11 is fixed to the outer peripheral surface of the mount tube 10 so as not to be relatively rotatable. Further, the rear plate portion 13 is provided with two rear plate bolt insertion holes 13b at a predetermined interval. Further, a pair of rear side wall portions 13a extending downwardly from both end portions is formed at both end portions in the vehicle width direction of the rear plate portion 13.

  When the cab is tilted down as shown in FIG. 1, the torsion bar inserted through the mount tube 10 of the cab mount 5 is twisted and generates a torsional reaction force. The cab mount 5 urges the rear plate portion 13 of the vehicle body frame side fastening portion 11 upward by this torsional reaction force, and assists the operator's operating force when the cab is tilted up.

  The cab 3 is a substantially box-shaped body and partitions the vehicle compartment 15 inside. The cab 3 includes a roof panel 16, a side panel 17, a front frame portion 18, a dash panel 19, a back panel 20, and a floor panel 21. These panels are made of a high-strength material such as a steel plate, for example, and are formed by press molding. Moreover, these panels are joined by spot welding or the like.

  The roof panel 9 defines the upper part of the passenger compartment 15. The side panels 17 are joined to both ends of the roof panel 16 in the vehicle width direction and define both ends of the vehicle compartment 15 in the vehicle width direction. The front frame portion 18 is joined to the side panel 17 in front of the passenger compartment 15. The dash panel 19 is joined to the front frame portion 18 and the side panel 17 and stands up along the vehicle width direction to partition the front end of the passenger compartment 15. The back panel 20 is joined to the roof panel 16 and the side panel 17 and defines the rear portion of the vehicle compartment 15. The floor panel 21 is joined to the side panel 17, the dash panel 19, and the back panel 20, and defines the bottom of the passenger compartment 15.

  The roof panel 16 is a substantially rectangular flat plate. Both ends of the roof panel 16 in the vehicle width direction are joined to the upper end of the side panel 17, and the rear end is joined to the upper end of the back panel 20.

  As shown in FIGS. 1 and 2, the side panel 17 has a door opening 22 formed in a substantially rectangular shape at the center, and also includes a front pillar portion 23, a rocker portion 24, a fender portion 25, a roof, A side rail portion 26 and a rear pillar portion 27 are provided.

  The front pillar portion 23 includes an inclined portion 23 a that extends inclined from the upper end to the front and a vertical portion 23 b that extends from the lower end of the inclined portion 23 a in a vertical direction, and constitutes a front edge of the door opening 22. In addition, door hinge mounting surface portions 23c are provided at two locations on the outer side surface of the front pillar portion 23 in the vehicle width direction. The door hinge mounting surface portion 23c rotatably supports a door (not shown) via a door hinge (not shown). Moreover, the door hinge attachment surface part 23c has a bolt insertion hole (not shown) into which a bolt for fixing the door hinge is screwed. The rocker portion 24 extends from the lower end of the front pillar portion 23 (the lower end of the vertical portion 23 b) so as to be bent backward and constitutes a part of the lower edge of the door opening 22. The fender portion 25 extends in an arch shape from the rear end of the rocker portion 24. The lower end side of the fender portion 25 constitutes a wheel house that covers the front wheels from above. Further, the upper end side of the fender portion 25 constitutes a part of the lower edge of the door opening 22. The roof side rail portion 26 extends from the upper end of the front pillar portion 23 (the upper end of the inclined portion 23 a) so as to bend toward the rear of the vehicle, and defines the upper edge of the door opening 22. The rear pillar portion 27 connects the rear end of the fender portion 25 and the rear end of the roof side rail portion 26 to partition the rear edge of the door opening 22.

  The back panel 20 is a substantially rectangular plate-like body. The back panel 20 has a back panel opening 28 into which a rear window glass is fitted in a substantially central portion. Further, the back panel 20 integrally includes a back panel extension 29 that extends downward from two left and right portions of the lower end.

  As shown in FIGS. 2 to 6, the floor panel 21 is a substantially rectangular plate-like body, and includes a center floor panel portion 30, a pair of floor concave portions 31, and a pair of side floor panel portions 32. These are integrally formed by pressing or the like. The upper surface of the floor panel 21 forms a floor surface 15 a of the passenger compartment 15. 4-6, illustration of the protrusion part 36 of the side floor panel part mentioned later is abbreviate | omitted.

  The center floor panel 30 is formed in the center of the vehicle compartment 15 in the vehicle width direction and extends from the front end to the rear end of the vehicle compartment 15, that is, from the front end to the rear end of the floor panel 21. The center floor panel portion 30 includes a center floor panel front portion 30a extending substantially horizontally from the front end of the floor panel 21 to the rear, and a center floor panel inclined portion extending inclined upward from the rear end of the center floor panel front portion 30a. 30b, and a center floor panel rear portion 30c that bends substantially parallel to the center floor panel front portion 30a from the rear end of the center floor panel inclined portion 30b and extends to the rear end of the floor panel 21. An engine room 44 for accommodating an engine (not shown) is formed below the center floor panel 30 of the vehicle 2.

  The floor recess 31 is formed in a pair above the cab mount 5 of the vehicle body frame 4 with the center floor panel portion 30 interposed therebetween. The floor recess 31 integrally includes a falling part 33, a flat part 34, and a rising part 35, has a U-shaped cross section, and is recessed downward. The falling portion 33 is bent from an end portion of the center floor panel portion 30 in the vehicle width direction and extends obliquely downward and outward in the vehicle width direction. The flat surface portion 34 is bent outward from the lower end of the falling portion 33 in the vehicle width direction and extends substantially horizontally in the vehicle width direction. The rising portion 35 is bent from the end of the flat portion 34 on the outer side in the vehicle width direction and extends obliquely upward and obliquely outward in the vehicle width direction. Further, the floor recess 31 extends from the front end to the rear end of the passenger compartment 15, that is, from the front end to the rear end of the floor panel 21.

  The floor recess 31 includes a floor recess front portion 31a extending rearward from the front end of the floor panel 21, a floor recess tilting portion 31b extending obliquely upward from the rear end of the floor recess front portion 31a, and a rear of the floor recess tilting portion 31b. And a floor recess rear portion 31c that bends substantially parallel to the floor recess front portion 31a from the end and extends to the rear end of the floor panel 21. The floor recess front portion 31a is bent in the horizontal direction from the floor recess front tilt portion 31d (see FIG. 7) extending downward from the front end of the floor panel 21 and the rear end of the floor recess front tilt portion 31d. A floor recess front horizontal portion 31e (see FIG. 7) extending rearward is provided. The falling part 33 in the floor recessed part inclined part 31b includes a first falling part 33a and a first falling part extending obliquely downward from an end of the center floor panel rear part 30c of the center floor panel part 30 in the vehicle width direction. And a second falling portion 33b extending obliquely downward from the lower end of the portion 33a (see FIG. 5). The first falling portion 33a is inclined relatively more gently than the second falling portion 33b.

  The floor recess front inclined portion 31d of the floor recess front portion 31a is provided with three floor recess bolt insertion holes 31f penetrating in the vertical direction at a predetermined interval. Further, two floor recess bolt insertion holes 31f penetrating in the vertical direction with a predetermined interval are provided in the flat portion 34 in the floor recess forward horizontal portion 31e.

  The side floor panel portions 32 are formed as a pair at both ends in the vehicle width direction of the bottom portion of the passenger compartment 15 with the center floor panel portion 30 and the pair of floor recesses 31 interposed therebetween. The side floor panel portion 32 extends from the upper end of the rising portion 35 of the floor recess 31 so as to be bent outward in the vehicle width direction. The side floor panel portion 32 includes a side floor panel front portion 32a extending substantially horizontally from the front end of the floor panel 21 to the rear, and a side floor panel inclined portion 32b extending obliquely upward from the rear end of the side floor panel front portion 32a. A side floor panel rear portion 32c that bends from the rear end of the side floor panel inclined portion 32b and extends to the rear end of the floor panel 21 substantially in parallel to the side floor panel front portion 32a. In addition, the side floor panel portion 32 is provided with three protrusions 36 of ribs extending across the side floor panel front portion 32a and the side floor panel inclined portion 32b with a predetermined interval. Further, a floor panel convex portion 37 protruding outward in the vehicle width direction is formed in front of the side floor panel front portion 32a on the outer side in the vehicle width direction. The floor panel convex portion 37 has a substantially square frustum shape and has a substantially rectangular floor panel convex portion top surface portion 37a on the outer side in the vehicle width direction. Moreover, the floor panel convex part 37 has the floor panel convex part standing surface part 37b. The floor panel convex portion standing surface portion 37b extends from each side of the floor panel convex portion top surface portion 37a to the base end portion of the floor panel convex portion 37 while inclining inward in the vehicle width direction.

  As shown in FIG. 3, the lower end portion of the center floor panel inclined portion 30b is disposed in front of the lower end portions of the floor recessed portion inclined portion 31b and the side floor panel inclined portion 29b. Further, the upper end portion of the center floor panel inclined portion 30b is forward of the upper end portions of the floor recessed portion inclined portion 31b and the side floor panel inclined portion 29b, and the lower end portions of the floor recessed portion inclined portion 31b and the side floor panel inclined portion 29b. Arranged at substantially the same position in the vehicle longitudinal direction.

  As shown in FIG. 4, the center floor panel front portion 30a and the side floor panel front portion 32a are formed to have the same height. Further, as shown in FIG. 6, the center floor panel rear portion 30c and the side floor panel rear portion 32c are formed to have the same height.

  As shown in FIGS. 1 and 2, the dash panel 19 is a substantially rectangular plate-like body, and includes a dash panel main body 38, a dash panel bent portion 39, a convex portion forming surface portion 40 (see FIG. 2), a dash panel 19. A panel protrusion 41, a long hole 42, and a dash panel extension 43 are provided. These are integrally formed by pressing or the like.

  The dash panel body 38 extends along the vehicle width direction. The dash panel bent portion 39 extends obliquely backward from both end portions of the dash panel main body 38. The long holes 42 are provided at two locations on the upper left and right sides of the dash panel main body 38. The long hole 42 is closed by the front frame portion 18 when the dash panel 19 is joined to the front frame portion 18.

  The convex portion forming surface portions 40 are provided at two locations on the top and bottom of the end portion of the dash panel bent portion 40. The convex portion forming surface portion 40 extends from the end portion of the dash panel bent portion 40 by bending backward. The convex portion forming surface portion 40 positioned below is shorter in the vertical direction than the convex portion forming surface portion 40 positioned above.

  The dash panel convex portion 41 projects outward from the convex portion forming surface portion 40 in the vehicle width direction. The dash panel convex portion 41 has a substantially rectangular dash panel convex portion top surface portion 41a on the outer side in the vehicle width direction. Moreover, the dash panel convex part 41 has the dash panel convex part standing surface part 41b. The dash panel convex part rising surface part 41b extends from the side located in front of the dash panel convex part top surface part 41a, the side located above and the side located below to the convex part forming surface part 40 while inclining inward in the vehicle width direction. Extend. The dash panel convex part 41 located below is smaller in size than the dash panel convex part 41 located above.

  The dash panel extension 43 extends downward from the front portion of the floor recess 31 in the lower end edge of the dash panel body 38. The dash panel extension 43 is bent from the front portion of the floor recess 31 at the lower end edge of the dash panel main body 38 to the lower side while being inclined forward, and bent backward from the lower end of the vertical plate portion 43a. , And a horizontal plate portion 43b (see FIG. 7) extending downwardly and integrally. Further, the vertical plate portion 43a integrally has an extended portion side wall portion 43c that bends and extends backward from both ends of the vertical plate portion 43a in the vehicle width direction. The lower end part of the extension part side wall part 43c continues to the vehicle width direction both ends of the horizontal plate part 43b. One horizontal plate bolt insertion hole 43d (see FIG. 7) penetrating in the vertical direction is provided at substantially the center of the horizontal plate portion 43b.

  Next, the joining aspect of the cab mount 5, the floor panel 21, and the dash panel 19 is demonstrated.

  As shown in FIGS. 1 and 7, the floor panel 21 and the dash panel 19 are welded to the front edge of the floor panel 21 and the lower edge of the dash panel 19 by spot welding or the like. The extension side wall 43c of the vertical plate 43a is joined to the inner peripheral surface of the front end of the floor recess 31 by welding by spot welding or the like. When the dash panel extension 43 is joined to the front end of the floor recess 31, the vertical plate portion 43 a of the dash panel extension 43 closes the front of the floor recess 31.

  Further, as shown in FIG. 7, the lower surface of the horizontal plate portion 43b comes into contact with the upper surface of the flat portion 34 on the front end side of the floor recess front inclined portion 31d. The lower surface of the flat portion 34 of the floor recess forward inclined portion 31 d abuts on the upper surface of the front plate portion 12 of the body frame side fastening portion 11 of the cab mount 5. In addition, the front of the lower surface of the flat portion 34 of the floor recess front horizontal portion 31e is in contact with the upper surface of the rear plate portion 13 of the vehicle body frame side fastening portion 11.

  Further, the horizontal plate portion bolt insertion hole 43d provided in the horizontal plate portion 43b communicates with the floor concave portion bolt insertion hole 31f provided in the foremost portion in the floor concave portion front inclined portion 31d, and these bolts are inserted. The hole communicates with the front plate bolt insertion hole 12c provided in the foremost position in the front plate 12 of the body frame side fastening portion 11. When these bolt insertion holes are inserted into the bolts 14 and screwed into the nuts 14a, the floor recess 31, the horizontal plate portion 43b of the dash panel extension 43, and the vehicle body frame side fastening portion 11 of the cab mount 5 are provided. The front plate portion 12 is coupled. Although not shown in FIG. 7, another floor recess bolt insertion hole 31 f provided in the floor recess forward inclined portion 31 d and another front plate portion provided in the front plate portion 12 of the vehicle body frame side fastening portion 11. The bolt insertion hole 12c communicates, and the floor recess bolt insertion hole 31 provided in the floor recess front horizontal portion 31e and the rear plate bolt insertion hole 13b provided in the rear plate portion 13 of the vehicle body frame side fastening portion 11 are provided. When the bolt 14 (only the center line is shown in the figure) inserted through the bolt insertion holes is screwed into the nut, the floor recess 31 and the front plate portion 12 of the vehicle body frame side fastening portion 11 The rear plate portion 13 is coupled.

  Moreover, when the floor panel 21 and the dash panel 19 are joined, the dash panel convex part top surface part 41a (refer FIG. 2) provided below and the floor panel convex part top surface part 37a (refer FIG. 2) are , Which is substantially flush. In addition, the dash panel convex part top surface part 41a provided in upper part contact | abuts the vehicle width direction inner side surface of the door hinge attaching part 23c (refer FIG. 3) of the upper side panel 17, and dash panel convex part provided in the downward direction The floor panel convex portion top surface portion 37a that is substantially flush with the top surface portion 41a contacts the inner surface in the vehicle width direction of the door hinge mounting portion 23c below the side panel 17.

  According to the present embodiment, the floor recess 31, the horizontal plate portion 43 b of the dash panel extension 43, and the front plate portion 12 of the vehicle body frame side fastening portion 11 of the cab mount 5 are joined together. The input from the frame 4 is input to the floor panel 21 and the dash panel 19 via the front plate portion 12 of the vehicle body frame side fastening portion 11 of the cab mount 5, the floor concave portion 31, and the horizontal plate portion 43 b of the dash panel extension portion 43. Enter in a distributed manner. In other words, the input from the vehicle body frame can be shared and supported by the floor panel 21 and the dash panel 19, and sufficient rigidity can be secured at the coupling portion of the cab 3 and the vehicle body frame 4 on the cab 3 side. it can. Therefore, it is not necessary to increase the plate thickness of the member on the cab 3 side at the joint portion between the cab 3 and the vehicle body frame 4, and the weight of the vehicle accompanying the increase in the plate thickness can be suppressed.

  Further, when the dash panel extension 43 is joined to the front end of the floor recess 31, the vertical plate 43 a of the dash panel extension 43 closes the front of the floor recess 31. The rigidity of the joint portion between the portion 43a and the front end of the floor recess 31 can be increased. For this reason, since it is not necessary to provide the member for closing the front of the floor recessed part 31, a number of parts and an assembly man-hour can be reduced.

  Further, since the floor recess 31 of the floor panel 21 is bent, the shape of the floor panel 21 is hardly deformed by the input to the floor panel 21, and the rigidity of the floor panel 21 is secured by the floor recess 31. For this reason, it is not necessary to adhere a reinforcing member such as a main sill to the lower surface of the floor panel 21, and the number of parts and the number of assembly steps are reduced. Therefore, the vehicle weight can be reduced and the assembly workability can be improved.

  In addition, the inner surface of the floor recess 31 can be used, for example, as a storage part for an in-vehicle product such as an in-vehicle fire extinguisher or a jack handle, and the space of the floor surface 15a of the passenger compartment 15 can be effectively used. it can.

  Further, the dash panel convex portion top surface portion 41a provided on the upper side is in contact with the inner surface in the vehicle width direction of the door hinge mounting portion 23c above the side panel 17 and is substantially the same as the dash panel convex portion top surface portion 41a provided on the lower side. The floor panel convex portion top surface portion 37a that is flush with the flat surface abuts against the inner surface of the door hinge mounting portion 23c below the side panel 17 in the vehicle width direction, so that the door hinge mounting surface portion 23c of the side panel 17 can be reinforced. .

  As mentioned above, although embodiment which applied the invention made | formed by this inventor was described, this invention is not limited with the description and drawing which make a part of indication of invention by this embodiment.

  As shown in FIG. 8, a step 45 is provided at a substantially central portion in the front-rear direction of the floor recess forward inclined portion 31d of the floor panel 21, the front of the floor recess forward inclined portion 31d extending forward from the step 45, and the cab mount. A horizontal plate portion accommodating space 46 for accommodating the horizontal plate portion 43 b of the dash panel extension 43 may be defined in front of the front plate portion 12 of the five body frame side fastening portions 11. In this case, the upper surface of the horizontal plate portion 43b is in contact with the lower surface in front of the floor recess front inclined portion 31d, and the lower surface of the horizontal plate portion 43b is in contact with the upper surface in front of the front plate portion 12. The front of the floor recess forward inclined portion 31d that has come into contact in this way, the horizontal plate portion 43b, and the front of the front plate portion 12 are respectively a floor recess bolt insertion hole 31f and a horizontal plate portion bolt insertion hole 43d. The front plate bolt insertion hole 12c communicates, and when the bolt 14 is inserted into the communicated bolt insertion hole and screwed into the nut 14a, they are coupled.

  That is, it should be added that other embodiments, examples, operation techniques, and the like made by those skilled in the art based on this embodiment are all included in the scope of the present invention.

  INDUSTRIAL APPLICABILITY The present invention can be widely applied to a front end lower structure of a cab that supports a front end lower portion of a cab having a dash panel and a floor panel by being coupled to a cab mount provided on a vehicle body frame.

1: Front end lower structure 2: Vehicle 3: Cab 4: Car body frame 5: Cab mount 10: Mount tube 11: Car body frame side fastening 12: Front plate portion 12c: Front plate portion bolt insertion hole 13: Rear plate portion 14: Bolt 19: dash panel 21: floor panel 31: floor recess 31a: floor recess forward portion 31d: floor recess forward inclined portion 31e: floor recess forward horizontal portion 31f: floor recess bolt insertion hole 34: plane portion 43: dash panel extension 43a : Vertical plate portion 43b: Horizontal plate portion 43d: Horizontal plate portion bolt insertion hole

Claims (2)

A front end lower structure of a cab that supports a lower portion of a front end of a cab having a dash panel and a floor panel by being coupled to a cab mount provided on a vehicle body frame,
A floor recess that is bent at the upper part of the cab mount of the front end of the floor panel and is recessed downward;
Of the lower end edge of the dash panel, there is a vertical plate portion that extends downward from the front portion of the floor concave portion, and a horizontal plate portion that is bent backward from the lower end of the vertical plate portion and overlaps the floor concave portion. A dash panel extension,
The floor recess and the horizontal plate portion of the dash panel extension have a bolt insertion hole penetrating both, and are coupled to the cab mount by a bolt inserted through the bolt insertion hole. Front end lower structure. The cab front end lower structure according to claim 1,
The lower end structure of the front end of the cab, wherein the vertical plate portion of the dash panel extension is joined to the front end of the floor recess to close the front of the floor recess.

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