JP7232419B2 - vehicle front structure - Google Patents

Description

The present disclosure relates to a vehicle front structure.

Patent Literature 1 describes a front end lower structure of a cab. Each of the pair of cab mount brackets has a substantially cylindrical mount rubber made of an elastic member inside the upper part, and is erected from the vehicle body frame at a predetermined distance in the vehicle width direction. A substantially cylindrical mount tube is rotatably supported by the cab mount bracket via a mount rubber. One end of a torsion bar passing through the mount tube is fixed to the mount tube, and the other end extends from the mount tube and is fixed to the anchor arm. The anchor arm is fixed to the cab mount bracket. The body frame side fastening portion is fixed to the outer peripheral surface of the mount tube. The body frame side fastening portion has a front plate portion extending obliquely downward from the front end side of the vehicle, and a rear plate portion bending substantially horizontally from the rear end portion of the front plate portion and extending rearward. The front plate portion has three front plate bolt insertion holes penetrating in the vertical direction at predetermined intervals, and the rear plate portion has two rear plate bolt insertion holes spaced at predetermined intervals. placed in place. In addition, a pair of front side wall portions are formed at both ends of the front plate portion in the vehicle width direction and extend downward from the both end portions. A pair of rear wall portions are formed to extend in a curved manner. An insertion hole through which the mount tube is inserted is formed substantially in the center of the front wall portion, the mount tube is inserted through the insertion hole, and the body frame side fastening portion is fixed to the outer peripheral surface of the mount tube so as not to rotate relative to each other. be done.

JP 2012-206590 A

By the way, since various devices are arranged under the cab, it is difficult to secure a space for installing tubular members such as pipes. As in the vehicle described in Patent Document 1, in a vehicle in which the vehicle body frame side fastening portion (tilt lever, etc.) is formed to have a U-shaped cross section that opens downward, left and right front wall portions of the tilt lever (hereinafter referred to as "left and right Since there is a space (a space extending in the front-rear direction below the mount tube) between them, it is conceivable to arrange the tubular member in such a space. As a result, the tubular member may cover the bolt insertion holes of the front plate and rear plate of the tilt lever (hereinafter collectively referred to as "upper plate") from below. If the tubular member covers the bolt insertion hole in the upper plate of the tilt lever from below, the bolt tightening tool and the tubular member may interfere with each other, complicating the work of fixing the tilt lever to the cab. Therefore, it is difficult to arrange the tubular member in the space between the left and right side wall portions of the tilt lever before fixing the tilt lever to the cab.

Accordingly, an object of the present disclosure is to provide a vehicle front structure in which a tubular member can be routed in a space between left and right side wall portions of a tilt lever before fixing the tilt lever to a cab.

In order to solve the above problems, in a first aspect of the present invention, the left and right supported portions of a cylindrical mount tube extending in the vehicle width direction are rotatably supported on the vehicle body frame side, and the cab is pivoted on the mount tube. A tiltable vehicle front structure comprising a tilt lever and a tubular member. The tilt lever has an upper plate portion that is fastened and fixed to the lower surface of the cab, and left and right side plate portions that extend downward from both ends of the upper plate portion in the vehicle width direction and are fixed to the mount tube. It is arranged between the left and right supported parts. The tubular member is arranged below the tilt lever and extends in the front-rear direction. The left and right side plate portions of the tilt lever each have a through hole through which the mount tube is inserted, and define a lever lower space below the mount tube between the left and right side plate portions. The upper plate portion of the tilt lever has a bolt insertion hole for a bolt that fixes the tilt lever and the cab. The center of the bolt insertion hole of the upper plate portion of the tilt lever in the vehicle width direction is arranged on one side in the vehicle width direction of the center line of the upper plate portion in the vehicle width direction. The tubular member is routed in a region on the other side in the vehicle width direction of the bolt insertion hole of the upper plate portion in the space under the lever.

In the above configuration, the center of the bolt insertion hole of the upper plate portion of the tilt lever in the vehicle width direction is arranged on one side in the vehicle width direction of the center line of the upper plate portion in the vehicle width direction. A wider space in the width direction can be secured on the other side in the vehicle width direction than the bolt insertion hole in the upper plate portion compared to the case where the bolt insertion hole is arranged at the center in the vehicle width direction. Further, since the tubular member is routed in a region on the other side of the vehicle width direction than the bolt insertion hole of the upper plate portion in the space under the lever between the left and right side plate portions of the tilt lever, the bolt insertion hole of the upper plate portion is arranged. and the tubular member can be offset in the vehicle width direction, and interference between the bolt fastening tool and the tubular member when fixing the tilt lever and the cab can be made difficult. Therefore, before the tilt lever is fixed to the cab, the tubular member can be arranged in the space between the left and right side wall portions of the tilt lever (the space under the lever).

A second aspect of the present invention is the vehicle front structure of the first aspect, wherein the tubular member is fixed to a mount tube between the left and right side plate portions of the tilt lever.

In the above configuration, since the tubular member is fixed to the mount tube between the left and right side plate portions of the tilt lever, the tubular member can follow the rotation of the mount tube when tilting the cab. Therefore, it is possible to suppress friction between the mount tube and the tubular member when the mount tube rotates, thereby protecting the tubular member.

According to the present disclosure, the tubular member can be routed into the space between the left and right side wall portions of the tilt lever before the tilt lever is fixed to the cab.

1 is a front view of a vehicle front structure according to an embodiment of the present invention; FIG. It is the side view which looked FIG. 1 from the II direction. It is the bottom view which looked FIG. 1 from the III direction.

An embodiment of the present invention will be described below with reference to the drawings. In each figure, 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 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.

As shown in FIGS. 1 and 2, a vehicle 1 to which the front structure according to the present embodiment is applied is a cab-over type truck in which a cab 2 is arranged generally above an engine (not shown). A tilt state in which the rear end side of the cab 2 is raised and a non-tilt state in which the rear end side of the cab 2 is lowered can be set around the mount tube 3 extending in the vehicle width direction at the lower front end of the cab 2 . A lower front end portion of the cab 2 is tiltably supported by a vehicle body frame 5 via a pair of left and right front cab mount brackets 4 , a mount tube 3 , and a pair of left and right tilt levers 11 .

The body frame 5 has a pair of left and right side members 6 and a plurality of cross members 7 (only one cross member 7 (first cross member 7) is shown in FIG. 1). The left and right side members 6 extend in the front-rear direction on both sides in the vehicle width direction. A plurality of cross members 7 extend in the vehicle width direction between the left and right side members 6 and connect the left and right side members 6 to each other. A cab 2 is arranged above the front portion of the body frame 5 , and an engine (not shown) is mounted below the cab 2 .

Left and right front cab mount brackets 4 are fixed to the left and right sides of the front end portion of the vehicle body frame 5 . The left and right front cab mount brackets 4 are fixed to the upper surface of the front end portion of the body frame 5 and stand upright at the front end portion of the body frame 5 . Mount tube support portions 9 provided with cylindrical mount rubbers (not shown) penetrating in the vehicle width direction are provided at the upper ends of the left and right front cab mount brackets 4 . The mount tube 3 is rotatably inserted through the front mount rubber of the mount tube support portion 9 .

The mount tube 3 is formed in a cylindrical shape and extends above the front end portion of the vehicle body frame 5 in the vehicle width direction. The mount tube 3 has left and right supported portions 3 a that are rotatably supported by the mount tube support portions 9 of the left and right front cab mount brackets 4 . That is, the mount tube 3 is rotatably supported on the vehicle body frame 5 side via the left and right front cab mount brackets 4 . A torsion bar (not shown) extending in the vehicle width direction is inserted through the inside of the mount tube 3 . One end of the torsion bar is fixed to one end of the mount tube 3 , and the other end of the torsion bar protrudes from the other end of the mount tube 3 and is fixed to the vehicle body frame 5 via a connecting bracket 8 . When in a non-tilt state, the torsion bar is in a twisted state and biases the cab 2 in the tilt direction via the mount tube 3 and the left and right tilt levers 11 .

As shown in FIGS. 1 to 3, the left and right tilt levers 11 are arranged between the left and right supported portions 3a of the mount tube 3 and fixed to the area between the left and right supported portions 3a of the mount tube 3. It is fixed to the cab 2 and rotates with respect to the vehicle body frame 5 together with the cab 2 and the mount tube 3 when the cab 2 is tilted. Note that the left and right tilt levers 11 are provided symmetrically on the left and right sides of the vehicle 1 and have substantially the same configuration. Therefore, the right tilt lever 11 will be described below, and the description of the left tilt lever 11 will be omitted. do.

The tilt lever 11 includes a lever upper plate portion (upper plate portion) 12 that is formed in a plate shape that intersects with the vertical direction and is fixed to the lower surface 2 a of the cab 2 . It integrally has left and right lever side plate portions (side plate portions) 13a and 13b extending to the vehicle width direction and intersecting with the vehicle width direction. That is, the tilt lever 11 is formed to have a substantially U-shaped cross section that opens downward. The lever upper plate portion 12 has a plurality of bolt insertion holes 14 arranged in the front-rear direction, and is formed in a plate shape that is longer in the front-rear direction than in the vehicle width direction. The centers of the plurality of bolt insertion holes 14 in the vehicle width direction are located inside the center line CL in the vehicle width direction of the lever upper plate portion 12 (indicated by the one-dot chain line CL in FIG. 3 ). side). The tilt lever 11 is fastened and fixed to the cab 2 by bolts 25 inserted through the plurality of bolt insertion holes 14 of the lever upper plate portion 12 . The left and right lever side plate portions 13a and 13b each have a through hole 15 through which the mount tube 3 is inserted, and face each other at positions spaced apart from each other in the vehicle width direction. Peripheral edge portions of the through holes 15 of the left and right lever side plate portions 13 a and 13 b are welded to the outer peripheral surface 16 of the mount tube 3 . The left and right lever side plate portions 13a and 13b define a space 17 (hereinafter referred to as "lever lower space 17") below the mount tube 3 between the left and right lever side plate portions 13a and 13b. In the embodiment, in the lever lower space 17 between the left and right lever side plate portions 13a and 13b of the right tilt lever 11), the vehicle width direction outer side (vehicle width direction The other side), a tubular member 18 is routed.

The tubular member 18 is positioned outside the lever upper plate portion 12 in the vehicle width direction (in this embodiment, the lever upper plate portion 12 is located in the lever lower space 17 between the left and right lever side plate portions 13a and 13b) relative to the plurality of bolt insertion holes 14 of the lever upper plate portion 12. outside the center line CL in the vehicle width direction). The tubular member 18 extends from the front of the tilt lever 11 to the rear of the tilt lever 11 via a lever lower space 17 between the left and right lever side plate portions 13a and 13b. One end (for example, the front end side) of the tubular member 18 is connected to the cab 2 side, and the other end (for example, the rear end side) is connected to a member on the vehicle body side (the side that does not tilt together with the cab 2 when the cab 2 tilts). and fixed via a bracket 22 to the outer peripheral surface 16 of the mount tube 3 between the left and right lever side plate portions 13a and 13b.

The bracket 22 integrally has a body portion 22a extending in the vehicle width direction below the mount tube 3 and four leg portions 22b extending from both ends in the vehicle width direction of the body portion 22a to both front and rear sides. It is arranged inside in the vehicle width direction of the center line CL of the plate portion 12 in the vehicle width direction. The distal end sides of the four legs 22b of the bracket 22 are located on the outer peripheral surface of the mount tube 3 between the left and right lever side plate portions 13a and 13b, which is inward in the vehicle width direction of the center line CL of the lever upper plate portion 12 in the vehicle width direction. 16 is welded. A bolt insertion hole (not shown) is formed at the outer end portion in the vehicle width direction of the body portion 22a. The vehicle width position of the bolt insertion hole of the main body portion 22 a is arranged at substantially the same position as the center line CL of the lever upper plate portion 12 in the vehicle width direction.

The tubular member 18 includes a connection pipe 19 fixed to the mount tube 3 between the left and right lever side plate portions 13a and 13b and extending in the front-rear direction, and front and rear hose pipes 20 connected to both front and rear ends of the connection pipe 19. and The connection pipe 19 is a pipe that connects the front and rear hose pipes 20, and is formed to a length that does not protrude forward and backward from the lever lower space 17 (in this embodiment, the length is slightly longer than the diameter of the mount tube 3). and arranged outside the plurality of bolt insertion holes 14 of the lever upper plate portion 12 in the vehicle width direction (in the present embodiment, outside the center line CL of the lever upper plate portion 12 in the vehicle width direction). . A fixing plate portion 21 is integrally provided on the connecting pipe 19 by welding or the like. The fixed plate portion 21 extends inward in the vehicle width direction from the connection pipe 19 and overlaps the main body portion 22a of the bracket 22 from below, and is fastened and fixed to the main body portion 22a by bolts 23 that pass through the bolt insertion holes of the main body portion 22a. Front and rear leg portions 21 a extending in both front and rear directions are provided at the inner end portion of the fixed plate portion 21 in the vehicle width direction. The tips of the front and rear leg portions 21a of the fixed plate portion 21 are in contact with the outer peripheral surface 16 of the mount tube 3 between the inner and outer leg portions 22b of the bracket 22 in the vehicle width direction. The front and rear hose pipes 20 are inserted into front and rear ends of the connecting pipe 19 and fixed to the connecting pipe 19 by clamps 24 .

When assembling the vehicle 1, the left and right front cab mount brackets 4, the mount tubes 3, and the left and right tilt levers 11 are attached to the vehicle body frame 5, and the tubular members 18 are attached to the left and right lever side plate portions 13a, 13a and 13a of the tilt lever 11. The left and right tilt levers 11 are fixed to the cab 2 after being routed in the lever lower space 17 between the left and right lever side plates 13a and 13b and fixed to the mount tube 3 between the left and right lever side plate portions 13a and 13b.

In the vehicle 1 configured as described above, the vehicle width direction center of the plurality of bolt insertion holes 14 of the lever upper plate portion 12 of the tilt lever 11 is aligned with the vehicle width direction center line CL of the lever upper plate portion 12 (Fig. 3 are indicated by a dashed line CL in FIG. 3), the bolt insertion holes 14 are arranged in the center of the lever upper plate portion 12 in the vehicle width direction. A wide space in the width direction can be secured outside the bolt insertion hole 14 in the vehicle width direction. Further, since the tubular member 18 is routed in a region outside the plurality of bolt insertion holes 14 of the lever upper plate portion 12 in the vehicle width direction in the lever lower space 17 between the left and right lever side plate portions 13a and 13b, the lever The plurality of bolt insertion holes 14 of the upper plate portion 12 and the tubular member 18 can be offset in the vehicle width direction, and the tightening tool for the bolt 25 and the tubular member 18 when fixing the tilt lever 11 and the cab 2 can be separated. It can be difficult to interfere.

Therefore, according to this embodiment, when assembling the vehicle 1, before fixing the tilt lever 11 to the cab 2, the tubular member 18 is inserted into the lever lower space 17 between the left and right lever side plate portions 13a and 13b of the tilt lever 11. can be arranged.

In addition, since the connection pipe 19 of the tubular member 18 is fixed to the mount tube 3 between the left and right lever side plate portions 13a and 13b, the tubular member 18 does not rotate with respect to the rotation of the mount tube 3 when the cab 2 is tilted. can be driven. Therefore, friction between the mount tube 3 and the tubular member 18 when the mount tube 3 rotates can be suppressed, and the tubular member 18 can be protected.

In this embodiment, the tubular member 18 is routed in the lever lower space 17 of the right tilt lever 11, but it may be routed in the lever lower space 17 of the left tilt lever 11. It may be arranged in the lever lower space 17 of the tilt lever 11 .

Further, in the present embodiment, the center of the bolt insertion hole 14 of the lever upper plate portion 12 in the vehicle width direction is arranged inside the center line CL of the lever upper plate portion 12 in the vehicle width direction in the vehicle width direction. It may be arranged outside in the vehicle width direction of the center line CL of the upper plate portion 12 in the vehicle width direction. In this case, the tubular member 18 may be routed in a region of the lever lower space 17 that is inside the plurality of bolt insertion holes 14 of the lever upper plate portion 12 in the vehicle width direction.

Further, in this embodiment, the tubular member 18 is provided with the connection pipe 19, and the tubular member 18 is connected to the mount tube 3 between the left and right lever side plate portions 13a and 13b via the fixing plate portion 21 and the bracket 22 of the connection pipe 19. However, the fixing direction of the tubular member 18 to the mount tube 3 is not limited to this, and the tubular member 18 can be fixed to the mount tube 3 by various methods.

Further, in the present embodiment, the tubular member 18 having the connection pipe 19 and the front and rear hose pipes 20 is used, but the tubular member 18 is not limited to this, and may be any other configuration as long as it is a tubular member. may

Further, in this embodiment, the tubular member 18 is fixed to the mount tube 3 between the left and right lever side plate portions 13a and 13b, but it is not fixed to the mount tube 3 between the left and right lever side plate portions 13a and 13b. may

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.

The vehicle front structure according to the present disclosure can be widely applied to vehicles in which the cab can be tilted around the mount tube.

1: Vehicle 2: Cab 2a: Lower surface of cab 3: Mount tube 3a: Left and right supported portions of mount tube 5: Body frame 11: Tilt lever 12: Lever upper plate (upper plate)
13a, 13b: left and right lever side plate portions (side plate portions)
14: Plural bolt insertion holes 15: Through hole 17: Lever lower space 18: Tubular member 25: Bolt

Claims (2)

A vehicle front structure in which left and right supported portions of a cylindrical mount tube extending in a vehicle width direction are rotatably supported on a vehicle body frame side, and a cab is tiltable about the mount tube,
and left and right side plate portions extending downward from both ends of the upper plate portion in the vehicle width direction and fixed to the mount tube. a tilt lever disposed between the left and right supported portions;
a tubular member disposed below the tilt lever and extending in the front-rear direction;
The left and right side plate portions of the tilt lever each have a through hole through which the mount tube is inserted, and define a lever lower space below the mount tube between the left and right side plate portions,
the upper plate portion of the tilt lever has a bolt insertion hole for a bolt for fixing the tilt lever and the cab,
The center of the bolt insertion hole of the upper plate portion of the tilt lever in the vehicle width direction is arranged on one side in the vehicle width direction of the center line of the upper plate portion in the vehicle width direction,
The vehicle front structure, wherein the tubular member is arranged in a region of the lever lower space on the other side of the bolt insertion hole of the upper plate in the vehicle width direction. The vehicle front structure according to claim 1,
The vehicle front structure, wherein the tubular member is fixed to the mount tube between the left and right side plate portions of the tilt lever.

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