JP3299171B2 - Support leg structure for heavy goods transport vehicles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a support leg structure for a heavy load carrying vehicle that carries a heavy load such as a construction machine or a work vehicle.

[0002]

2. Description of the Related Art A heavy load transporting vehicle for carrying a heavy load such as a construction machine or a working vehicle is provided with a support leg which can be lifted and lowered in front of a loading platform in order to smoothly load and unload the heavy load. A heavy-duty transport vehicle with its legs extended to the ground and the loading platform or body tilted backwards
97114 and Japanese Utility Model Application Laid-Open No. 64-16440.

[0003]

When the loading platform or the vehicle body is tilted backward, the parking brake is applied, and the support legs are fixed on the ground to lift the loading platform or the vehicle body. A direction shift occurs. In the case of a vehicle equipped with center parking immediately after the transmission as the parking brake, the rear wheel serving as a fulcrum is rotated by the backlash of the power line, the differential gear, etc., and the longitudinal direction of the vehicle is determined by the rotation locus of the carrier or the vehicle body. Therefore, the vehicle can be operated without exerting an excessive force on the entire vehicle.

[0004] In recent years, however, there is a vehicle that adopts a wheel parking system in which wheels are directly braked.
In this wheel parking system, since the rear wheel serving as a fulcrum is locked, it is not possible to absorb a displacement in the front-rear direction of the vehicle due to the rotation locus of the carrier or the vehicle body when leaning backward, and excessive force is applied to the entire vehicle, This could spread to the support legs and cause the support legs to deform.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a support leg structure for a heavy-duty transport vehicle that allows the carrier or the vehicle body to tilt backward without exerting an excessive force on the support leg.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, according to the present invention, there is provided a carrier capable of tilting backward.
3 is provided with support legs 4 which can be moved up and down by a cylinder 5 in front of
In the heavy goods transport vehicle, the lower end of the support leg 4 is
A grounding table 6 movable in the front-rear direction of the vehicle with respect to the support legs 4
In the stationary state where the grounding table 6 is grounded to the ground.
In front of the vehicle due to the rotation trajectory when the bed 3 is tilted backward
The support leg 4 moves with respect to the grounding table 6 by the amount of rearward displacement.
It is characterized in that it is absorbed .

[0007] According to a second aspect of the present invention, the ground is provided.
The table 6 has a fork 7 formed at the lower end of the support leg 4 and a support shaft 9.
Roller 8 that is rotatably supported in the front-rear direction of the vehicle
And the fork 7 penetrating the support shaft 9 and
It is installed on a frame 17 movably mounted in both front and rear directions.
And the roller 8 comes into contact with the ground and is fixed to the ground.
And a floor member 10 to be formed .

[0008]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes an operator's cab, 2 denotes a chassis frame, and 3 denotes a carrier. The carrier 3 is inclined rearward by the rearward inclination of the vehicle body. Reference numeral 4 denotes a support leg provided in front of the loading platform 3, which is extended and contracted by a cylinder 5. Reference numeral 6 denotes a grounding stand provided at the lower end of the support leg 4.

In this vehicle, the support leg 4 is extended downward by the cylinder 5 so that the grounding table 6 is grounded,
The front of the driver's seat 1 is lifted with the rear wheel as a fulcrum, and the carrier 3 is tilted rearward together with the chassis frame 2.

[0010] The present invention, wherein the ground base 6 provided in the lower end of the support leg 4 is movable relative to the support leg 4 in the longitudinal direction of the vehicle, the front and rear of the vehicle by the rotation trajectory in傾時after loading platform 3 The deviation in the direction is absorbed. An embodiment of the means for absorbing the displacement of the vehicle in the front-rear direction due to the rotation trajectory when the carrier 3 is tilted rearward will be described below.

As shown in FIGS. 2 to 4, a forked fork 7 is provided at the lower end of the support leg 4, and a roller 8 is attached to the fork 7.
Is supported by a support shaft 9 so as to be rotatable in the front-rear direction of the vehicle.

Furthermore, the floor member 10 is attached to the fork 7. The floor member 10 is composed of a guide surface 11 against which the roller 8 contacts, and a pair of frames 17 which are raised up from the guide surface in parallel to each other and have a window 13 as shown in FIG. As described above, the rollers 8 are located between the pair of frames 17.

[0013] The grounding table 6 having the above-described structure moves the support leg 4 downward.
And stretched as shown in FIG. 2 the floor member 10 when the ground, in contact with the guide surface 11 of the roller 8 floor member 10, the ground
The support leg 4 can be moved in the front-rear direction of the vehicle by the rolling of the roller 8 with respect to the floor member 10 which is fixed to the vehicle.

3 , the support shaft 9 of the roller 8 engages with the concave portion 12 formed above the frame 17 so that the floor member 10 and the fork 7 move together with the support leg 4 in the retracted state. Will be pulled up.

As shown in FIG . 1, when the support legs 4 are extended downward to lift the carrier 3 together with the chassis frame 2 and tilt backward, the floor member 10 which is grounded and fixed as described above.
On the other hand, the roller 8 comes into contact with the guide surface 11 of the floor member 10, and the support leg 4 can move in the front-rear direction of the vehicle by the rolling of the roller 8.

[0016] Therefore, by the rear wheels to pivot lifted the front of a driver's seat 1, the傾時after loading platform 3, the longitudinal direction of the deviation of the vehicle due to the rotation locus occurs. At this time, when the vehicle is in the center parking, the rear wheel serving as a fulcrum rotates due to the backlash of the power line, the differential gear, etc., to absorb a deviation in the front-rear direction of the vehicle due to the rotation locus of the vehicle body. Since the rear wheel serving as the fulcrum is locked, it cannot be absorbed by the movement of the vehicle body, and an excessive force is applied to the support leg 4. According to the present invention, the floor member in which the roller 8 is fixed on the ground is provided. Rolling on the guide surface 11 of the vehicle 10 absorbs the deviation of the vehicle in the front-rear direction due to the rotation locus of the vehicle body.

[0017] Thus, even impossible to absorb the longitudinal displacement of the vehicle by the vehicle body rotational locus wheel is locked after a fulcrum vehicle movement in the longitudinal direction of the support leg 4 is the vehicle Since the support leg 4 is absorbed by moving, no excessive force is applied to the support leg 4, thereby preventing the support leg 4 from being deformed.

The present invention is effective for a vehicle provided with a wheel parking in which a rear wheel serving as a fulcrum is locked when the carrier 3 is tilted rearward. By applying the present invention when the displacement of the vehicle in the front-rear direction due to the trajectory exceeds the backlash of the power line, the differential gear, and the like, the support leg 4 is provided.
The present invention is not limited to vehicles having wheel parking, and can be applied to vehicles having center parking, since excessive force is not applied to the vehicle and deformation of the support legs 4 can be prevented. Is also effective.

[0019]

As described above, according to the present invention, the vehicle
The ground base movable in the longitudinal direction of the vehicle relative to the support leg to the lower end of the support legs for supporting provided, with respect to the ground base the offset portion of the longitudinal direction of the vehicle by the rotation trajectory in 傾時after loading platform
Since the support legs are moved and absorbed,
The support leg is not subjected to excessive force, and has an advantage of preventing deformation of the support leg.

[Brief description of the drawings]

FIG. 1 is a side view of a vehicle provided with a support leg structure of the present invention.

FIG. 2 is a side view showing the grounding state of the grounding table of the support leg structure of the present invention.

FIG. 3 is a side view showing a stored state of a grounding stand of the support leg structure of the present invention.

FIG. 4 is a sectional view taken along line AA of FIG. 2;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 cab 2 chassis frame 3 carrier 4 support leg 5 cylinder 6 ground stand 7 fork 8 roller 9 support shaft 10 floor member 11 guide surface 12 recess 13 window 17 frame

Continuation of the front page (56) References JP-A-62-31538 (JP, A) JP-A-1-317857 (JP, A) JP-A-6-167095 (JP, A) JP-A-58-182844 (JP) , U) Fully open Showa 61-192966 (JP, U) Fully open Showa 50-97114 (JP, U) Fully open Showa 16-16440 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB) Name) B60P 1/04

Claims (2)

(57) [Claims] 1. A cylinder 5 is provided in front of a carrier 3 which can be tilted rearward.
Therefore, a heavy-duty vehicle equipped with the support legs 4
And the lower end of the support leg 4
A ground table 6 movable in the front-rear direction is provided, and the ground table 6 is
When the bed 3 is tilted backward in the stationary state where it is grounded on the ground
The displacement of the vehicle in the front-rear direction due to the rotation locus
The support leg 4 is moved and absorbed with respect to the base 6.
And a support leg structure for a heavy goods transport vehicle. 2. The ground stand 6 is formed at the lower end of the support leg 4.
The fork 7 rotated by the support shaft 9 in the front-rear direction of the vehicle
A roller 8 pivotally supported and the support shaft 9
Movably in the vertical direction and the front and rear direction of the vehicle
The roller 8 is provided on the frame 17
And a floor member 10 that is fixed to the ground.
Supporting leg structure amounts thereof transportation vehicle according to claim 1, characterized in that is.