JP4112752B2 - Work vehicle outrigger - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to an improvement in an outrigger used in a work vehicle such as an aerial work vehicle or a crane vehicle.
[0002]
[Prior art]
As shown in FIGS. 3 and 4, a conventional outrigger that is an improvement object of the present invention includes a double-acting hydraulic cylinder 1, a link member 2, and a ground plate 3.
[0003]
The double-acting hydraulic cylinder 1 includes a cylinder 1a and a piston rod 1b, and the upper end of the piston rod 1b is swingably attached to one side of the vehicle A via a swing fulcrum shaft 4. Thus, it is possible to swing between an extended position (FIG. 4) protruding outside the vehicle width of the vehicle A and a retracted position (FIG. 3) stored inside the vehicle width around the swing fulcrum shaft 4. It has become.
[0004]
One end portion of the link member 2 is pivotally connected 5 to an appropriate position of the cylinder 1a of the double-acting hydraulic cylinder 1, and the other end portion is pivotally connected 6 to an appropriate position of the vehicle A. The link member 2 swings the double-acting hydraulic cylinder 1 to the extended position (position in FIG. 4) when the double-acting hydraulic cylinder 1 is extended, and causes the double-acting hydraulic cylinder 1 to be It swings to the storage position (position of FIG. 3) .
[0005]
The link member 2 has a function of swinging the double-acting hydraulic cylinder 1 as described above in conjunction with the expansion and contraction drive of the double-acting hydraulic cylinder 1. In the position of FIG. 3, the link member 2 is inclined so that one end portion (the pivot attachment 5 side) is higher than the other end (several attachment 6 side). The link member 2 rotates outward from the vehicle A according to the extension of the double-acting hydraulic cylinder 1 from the retracted position (position of FIG. 3), and the double-acting hydraulic cylinder 1 is set to the extended position (state of FIG. 4). It is designed to rotate.
[0006]
The grounding plate 3 is attached to the bottom end lower end portion of the cylinder 1a of the double-acting hydraulic cylinder 1 via a swinging means 7 so as to be swingable. The lower surface of the ground plate 3 is a ground surface 3a. The swinging means 7 ensures the tilting of the grounding plate 3 according to the tilting degree of the grounding road surface when the grounding plate 3 is grounded with the double-acting hydraulic cylinder 1 in the extended position.
[0007]
The outrigger of the work vehicle configured as described above simply drives the double-acting hydraulic cylinder 1 to extend or contract, and causes the grounding plate 3 to contact the ground with the double-acting hydraulic cylinder 1 as an overhanging position, or the double-acting hydraulic cylinder 1 Therefore, the grounding plate 3 can be stored in a position that does not hinder the traveling of the vehicle A.
[0008]
[Problems to be solved by the invention]
By the way, in this type of conventional outrigger, the mounting position of the swinging means 7 on the upper side of the ground plate 3 is mounted on the center of gravity G of the ground plate 3, and the double-acting hydraulic cylinder 1 is retracted (see FIG. In 3), the grounding surface 3a of the grounding plate 3 (hereinafter simply referred to as the grounding plate 3 in the retracted position) suspended from the lower end of the cylinder 1a of the double acting hydraulic cylinder 1 via the swinging means 7 is substantially horizontal. The mounting position of the swinging means 7 on the upper side of the ground plate 3 is mounted on the gravity center position G of the ground plate 3. By doing in this way, the grounding surface 3a of the grounding plate 3 in the retracted position is kept horizontal, and the gap between the contact surface 3a and the ground is ensured to the maximum.
However, the conventional outrigger in which the swinging means 7 is mounted on the center of gravity position G of the ground plate 3 so as to keep the ground surface 3a of the ground plate 3 in the retracted position horizontal is the ground plate 3 when the vehicle A travels. Oscillates, there is a problem that the distance between the ground plate 3 and the ground is reduced by this oscillation.
An object of the present invention is to provide a novel outrigger capable of suppressing the swing of the ground plate 3 in the retracted position and maintaining the ground surface 3a horizontally.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, an outrigger for a work vehicle according to the present invention is configured as follows. Double-acting that is pivotably attached to one side of the vehicle A so that the upper end portion of the piston rod 1b swings between a protruding position protruding outside the vehicle width of the vehicle A and a retracted position stored inside the vehicle width. A hydraulic cylinder 1 is a link member 2 having one end portion pivotally connected to the cylinder 1a of the double-acting hydraulic cylinder 1 and the other end pivotally connected to one side of the vehicle. A link member 2 that swings the double-acting hydraulic cylinder 1 to the extended position and swings the double-acting hydraulic cylinder 1 to the retracted position when the double-acting hydraulic cylinder 1 is reduced, and a grounding surface 3a on the lower surface thereof. A grounding plate 3 , the upper side of which is provided with a grounding plate 3 that is swingably attached to the bottom end lower end of the cylinder 1 a of the double-acting hydraulic cylinder 1 via a swinging means 7. An outrigger,
The contact mounting position of the ground plate 3 above the swinging means 7, when both when the vehicle widthwise outer position the center of gravity G of the ground plane 3, which double-acting hydraulic cylinder 1 is tilted to the storage position A stopper 8 that is engaged with the outer side of the rocking means 7 in the vehicle width direction above the base plate 3 and maintains the grounding surface 3a of the grounding plate 3 substantially horizontally is provided at the bottom of the cylinder 1a in the double acting hydraulic cylinder 1. An outrigger for a work vehicle characterized by being provided at an appropriate end .
[0010]
[Action]
In the outrigger of the work vehicle configured as described above, the mounting position of the swinging means 7 on the upper side of the ground plate 3 is set to the outer side in the vehicle width direction with respect to the center of gravity position G of the ground plate 3, so The ground plate 3 is always subjected to a rotational force that rotates downward inward in the vehicle width direction relative to the swinging means 7. On the other hand, in the bottom end of the double-acting hydraulic cylinder 1 at the bottom end of the cylinder 1a, when the double-acting hydraulic cylinder 1 tilts to the retracted position, it is above the ground plate 3 and outside the swinging means 7 in the vehicle width direction. Since the stopper 8 is provided to engage the position and keep the grounding surface 3a of the grounding plate 3 substantially horizontal, the stopper 8 restricts the rotation of the grounding plate 3 by the rotational force . For this reason, the grounding plate 3 in the retracted position restricts the turning power that rotates the inner side in the vehicle width direction downward with respect to the swinging means 7 that is always acting, by the stopper 8, and the grounding surface 3 a of the grounding plate 3. However, the swinging of the grounding plate 3 in the retracted position during traveling of the vehicle A is greatly suppressed.
In the state where the double acting hydraulic cylinder 1 is swung to the extended position, the stopper 8 is avoided upward and the swinging area of the ground plate 3 is increased. Therefore, the grounding required when the ground plate 3 is grounded is required. The tilting of the grounding plate 3 according to the slope of the road surface is ensured.
[0011]
【Example】
Hereinafter, an embodiment of an outrigger for a work vehicle according to the present invention will be described with reference to FIGS. The outrigger of the present invention is different from the conventional outrigger described above in that the mounting position of the swinging means 7 on the upper side of the ground plate 3 is different, and the bottom end of the cylinder 1a in the double acting hydraulic cylinder 1 The only difference is that the stopper 8 for restricting the swinging of the grounding plate 3 in the retracted position is provided at an appropriate position. Therefore, in the following description, the above-mentioned conventional points are excluded except for these two points. The explanation of the outrigger is used as it is.
[0012]
1 and 2, the mounting position of the swinging means 7 on the upper side of the ground plate 3 is located on the outer side in the vehicle width direction from the center of gravity position G of the ground plate 3. For this reason, the rotating power a which always turns the inner side in the vehicle width direction below the swinging means 7 acts on the ground plate 3 in the retracted position. A stopper 8 is provided at the bottom end of the cylinder 1a in the double-acting hydraulic cylinder 1, and this stopper 8 is located above the ground plate 3 when the double-acting hydraulic cylinder 1 is tilted to the storage position (FIG. 1). Thus, the grounding surface 3a of the grounding plate 3 is maintained substantially horizontal by engaging the outer side of the swinging means 7 in the vehicle width direction.
[0013]
The grounding plate 3 in the retracted position is controlled by the stopper 8 so as to rotate the inner side in the vehicle width direction downward relative to the swinging means 7 that is always acting, and the grounding surface 3a of the grounding plate 3 is regulated. Is almost horizontal. For this reason, the rocking | fluctuation at the time of the vehicle A driving | running | working of the grounding board 3 in a retracted position is suppressed significantly.
[0014]
When the double-acting hydraulic cylinder 1 is swung to the extended position (FIG. 2), the stubber 8 is avoided upward and the swinging area of the grounding plate 3 is increased. Therefore, when the grounding plate 3 is grounded. The inclination of the ground plate 3 according to the required degree of inclination of the ground road surface is ensured.
[0015]
【effect】
Since the outrigger of the work vehicle according to the present invention is configured and operates as described above, the mounting position of the swinging means 7 on the upper side of the ground plate 3 in the conventional outrigger is changed, and the double-acting hydraulic cylinder 1 is changed. In a state where the ground plate 3 in the retracted position is maintained substantially horizontal, with a simple configuration in which a stopper for restricting the swinging of the ground plate 1 in the retracted position is added to an appropriate position at the bottom end of the cylinder 1a. Since the rocking can be restricted, it is possible to prevent the distance between the ground plate 3 and the ground from being reduced by the rocking of the ground plate 3.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of a stored state of an outrigger of a work vehicle according to the present invention.
FIG. 2 is an explanatory view of an outrigger extended state of the work vehicle according to the present invention.
FIG. 3 is an explanatory diagram of a stored state of an outrigger of a conventional work vehicle.
FIG. 4 is an explanatory diagram of an outrigger extended state of a conventional work vehicle.
[Explanation of symbols]
A: Vehicle,
1; double acting hydraulic cylinder,
1a: cylinder,
1b: piston rod,
2; Link member,
3; ground plate,
3a; ground plane,
4; Oscillation fulcrum shaft (oscillation fulcrum shaft of double acting hydraulic cylinder),
5; Pivoting (cylinder 1a side),
6; Pivoting (vehicle A side),
7; rocking means,
G: Center of gravity position of the ground plate 3
B. Rotation power

Claims (1)

A double-acting mechanism that swings between an overhanging position where the upper end portion of the piston rod 1b is swingably attached to one side of the vehicle A and protrudes outside the vehicle width of the vehicle A and a retracted position stored inside the vehicle width. The hydraulic cylinder 1 is a link member 2 having one end portion pivotally connected to the cylinder 1a of the double acting hydraulic cylinder 1 and the other end pivotally connected to one side of the vehicle. A link member 2 that swings the double-acting hydraulic cylinder 1 to the extended position and swings the double-acting hydraulic cylinder 1 to the retracted position when the double-acting hydraulic cylinder 1 is reduced, and a grounding surface 3a on the lower surface thereof. A grounding plate 3 , the upper side of which is provided with a grounding plate 3 that is swingably attached to the bottom end lower end of the cylinder 1 a of the double-acting hydraulic cylinder 1 via a swinging means 7. An outrigger,
The contact mounting position of the ground plate 3 above the swinging means 7, when both when the vehicle widthwise outer position the center of gravity G of the ground plane 3, which double-acting hydraulic cylinder 1 is tilted to the storage position A stopper 8 that is engaged with the outer side of the rocking means 7 in the vehicle width direction above the base plate 3 and maintains the grounding surface 3a of the grounding plate 3 substantially horizontally is provided at the bottom of the cylinder 1a in the double acting hydraulic cylinder 1. An outrigger for a work vehicle characterized by being provided at an appropriate end .

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