JPH0642544U - Front structure of tilt-type cab-over vehicle - Google Patents

Abstract

(57) [Abstract] [Purpose] Effectively prevent the concave deformation of the cab front panel at the time of a rear-end collision. [Structure] The torque tube 3 to which a bracket 23 of a cab bottom 22 is coupled is supported by a support bracket 21 provided on the side frame 12, and one end of a locking wire 4 is attached to the outer circumference of the torque tube 3 by a perforated terminal 41. They are connected so as to be rotatable relative to each other, and the other end is fixed to the front frame 11. The position of the torque tube 3 does not change even when the cab is tilted, and the locking wire 4 is connected so as to be relatively rotatable, so that the cab 2 can be tilted freely. The load at the time of a rear impact mainly acts on the lower half part of the cab front panel 21, but since the torque tube 3 is connected to the front frame 11 by the locking wire 4, the torque tube 3 is not displaced rearward, and the front panel 21 is It does not largely deform into the rear passenger compartment.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a front structure of a tilt-type cab-over vehicle, and more particularly to an improvement of a front structure that effectively prevents deformation of a front panel inside a vehicle in a collision.

[0002]

[Prior art]

 FIG. 8 shows an example of the front structure of a cab-over vehicle (for example, actual flat 1-59781). In the lower half of the front panel 24 of the cab 2 on which headlamps and the like are mounted, reinforcements extending vertically in the left and right positions are provided. Beams 6 are provided, and each reinforcing beam 6 has its upper end fixed to the upper middle portion of the front panel 24 and its lower end fixed to the front frame 11.

By providing the reinforcing beam 6, it is possible to prevent the cab front panel 21 from being largely recessed and deformed into the rear passenger compartment when the vehicle collides with a front vehicle.

[0004]

[Problems to be solved by the device]

 However, the above-mentioned conventional structure has a problem that it cannot be applied to a tilt-type vehicle in which the cab is greatly tilted forward at the time of engine inspection and the like, and there has been a demand for its solution.

In view of such a demand, the present invention has an object to provide a front structure of a tilt-type cab-over vehicle that effectively prevents concave deformation of the cab front panel during a rear-end collision or the like.

[0006]

[Means for Solving the Problems]

 The structure of the present invention will be described. In a tilt-type cab-over vehicle in which the cab can be tilted forward, tilting shafts 3 to which the bottom surface of the cab 2 is coupled are provided on the frames 12 at the vehicle left and right positions, respectively. It is supported by a support member 21, one end of the long locking member 4 is fixed to the tilt shaft 3, and the other end is fixed to a vehicle frame portion 11 in front of the tilt shaft 3.

[0007]

[Action]

 Since the position of the tilting shaft 3 does not change even when the cab is tilted, the cab 2 can be tilted freely even if the tilting shaft 3 and the front frame portion 11 are connected by the locking member 4. .

The load at the time of a rear impact mainly acts on the lower half of the cab front panel 24, but the tilting shaft 3 connected to the bottom surface of the cab 2 is connected to the frame portion 11 by the locking member 4. Even when a load is applied, the tilting shaft 3 is not displaced rearward, which prevents the front panel 24 from being concavely deformed into the rear passenger compartment.

[0009]

First Embodiment In FIG. 1, a cab 2 of a tilt-type cab-over vehicle can be tilted forward of the vehicle by a structure described later, and a torque tube 3 serving as a tilt axis arranged in the vehicle width direction has a vehicle frame at both ends. It is supported by the support brackets 21 provided on the left and right side frames 12 that make up part 1. A locking wire 4, which will be described in detail later, is stretched between the left and right parts of the front frame 11 connecting the front ends of the side frames 12 and both ends of the torque tube 3.

2 and 3, one end portion of the torque tube 3 is a fixing portion 32 fixed to the upper end portion of the support bracket 21, and one end of the torsion bar 31 penetrating the tube is fixed. It is fixed in the portion 32. The main body of the torque tube 3 excluding the fixed portion 32 is a movable portion 33 whose both ends are rotatably supported by support brackets, and the outer periphery of the movable portion 33 has a cab bottom 22 (FIG. 4). A bracket 23 having a U-shaped cross section, which projects from the left and right positions (only one is shown), is fixed. The torsion bar 31 is twisted and deformed in a state in which the cab 2 is in a horizontal posture, and exerts a spring force in a direction in which the cab 2 is rotated and tilted, thereby reducing an operating force when the cab is tilted.

As shown in FIG. 4, the locking wire 4 is stretched obliquely rearward from the front front frame 11 and connected to the torque tube 3. That is, the perforated terminal 42 is caulked and fixed to the front end of the locking wire 4 (FIG. 5), and this is connected to the front frame 11 with the bolt 43. On the other hand, a perforated terminal 41 having an opening slightly larger than the outer diameter of the torque tube 3 is caulked and fixed to the rear end of the locking wire 4, which is attached to the outer periphery of the movable portion 33 of the torque tube 3. .

Since the attached perforated terminal 41 is rotatable relative to the torque tube movable part 33, the movable part 33 rotates (arrows in FIG. 4) as the cab 2 tilts forward (chain line in FIG. 4). Direction) is free.

In the case of a rear-end collision with a vehicle in front, as shown in FIG. 4, a load in the direction of the arrow in the drawing acts on the torque tube 3 from the rear portion of the abutting vehicle M. Since the torque tube 3 is connected to the front frame 11 by means of 4, the torque tube 3 is not displaced rearward even when a load is applied. Thus, the front panel 21 of the cab 2 is prevented from being largely recessed and deformed in the rear passenger compartment.

[0014]

Second Embodiment The present invention can be applied to a structure that does not use a torque tube. That is, in FIG. 6 and FIG. 7, the brackets 23 provided at the left and right positions (only one is shown) of the cab bottom 22 are mounted on the mount bolts 5 that are erected on the forked portions of the support brackets 21 on the side frame 12, respectively, and are tubular portions. It is rotatably connected by 231 and a locking wire 4 is stretched between a mount bolt 5 and a front frame (not shown).

With this structure as well, the same effects as in the first embodiment are obtained, and since the mount bolt 5 does not rotate, it is not necessary to make the perforated terminal 41 relatively rotatable, and the coupling structure also has a perforated terminal. Not limited to

Although it is easy to use the locking wire, it is not limited to the wire, and a beam or the like may be used.

[0017]

[Effect of device]

 As described above, according to the present invention, it is possible to minimize the concave deformation of the front panel at the time of a rear-end collision of a tilt-type cab-over vehicle.

[Brief description of drawings]

FIG. 1 is a front perspective view of a tilt-type cab-over vehicle according to an embodiment of the present invention.

FIG. 2 is a perspective view of a torque tube support portion.

FIG. 3 is a vertical sectional view of a torque tube support portion.

FIG. 4 is a side view of a torque tube support portion.

FIG. 5 is a perspective view of an end portion of a locking wire.

FIG. 6 is a perspective view of a torque tube supporting portion according to another embodiment of the present invention.

FIG. 7 is a vertical sectional view of a torque tube support portion.

FIG. 8 is a front perspective view of a tilt-type cab-over vehicle showing a conventional example.

[Explanation of symbols]

 1 Vehicle Frame 11 Front Frame 12 Side Frame 2 Cab 21 Support Bracket (Support Member) 3 Torque Tube (Tilt Shaft) 4 Locking Wire (Locking Member) 5 Mount Bolt (Tilt Shaft)

Claims (1)

[Scope of utility model registration request] 1. In a tilt-type cab-over vehicle in which a cab can be tilted forward, tilting shafts connected to the bottom surface of the cab are supported by supporting members provided on frames at left and right positions of the vehicle, respectively, to provide a long member. A front structure of a tilt-type cab-over vehicle, wherein one end of a stop member is fixed to the tilt shaft and the other end is fixed to a vehicle frame portion in front of the tilt shaft.