JPS58128938A - Specially equipped car - Google Patents

Abstract

PURPOSE:To lower the center of gravity under travelling and to improve the suspention performance under working, by supporting a counterweight on a boom rotatable up and down on the crane base of a specially equipped car such as a truck crane. CONSTITUTION:When a piston rod 15 of a hydraulic cylinder 14 is retreated, arms 11, 13 are bent around a pin 12 to hold a counterweight 9 suspended by a rotary arm 8 while being jointed to the rear end 1a of a chassis 1, to lower the center of gravity of a crane truck. When projecting the rod 15 of the cylinder 14 from this state, the arm 11 will pivot counterclockwise around the pin 12 while the pivot arm 8 will also pivot in the same direction around a shaft 7 and the arm 13 will pivot clockwise to lift the counterweight 9 to the state shown by the dashed line. When inserting a lock pin 20 through engaging holes 17, 18 and 19 under this state, the arms 11, 13 are coupled linearly to hold the weight 9, resulting in the increase of the suspention capacity.

Description

[Detailed Description of the Invention] This invention is designed to raise and lower y4it like a truck crane, etc.
Concerning a specially equipped vehicle with a boom capable of b.

A specially equipped vehicle such as a truck crane is provided with a lane base that can freely rotate relative to the vehicle body, and a boom and a counterweight that can be raised and lowered are attached to the crane base. Therefore, the crane 1 installed on the top of the unit
There is a drawback that the amount increases and the center of gravity of the crane vehicle rises, making it impossible to maintain a large maximum angle of inclination when traveling.

Therefore, an attempt is made to obtain an appropriate weight distribution by varying the amount of offset t from the center of the rear shaft to the center of rotation of the crane depending on the weight of the crane. However, it is difficult to distribute the weight, and an increase in the number of models produced is unavoidable. Furthermore, the counterweight attached to the rear end of the crane base creates a large rear overhang9, creating the risk that a following vehicle that is driving based on the license plate or tail light of the vehicle will collide with the counterweight.

In addition, during crane work, the counterweight is fixedly installed on the crane base, so the total torque of the counterweight cannot be increased, and
There is also a restriction that the weight of the counterweight cannot be made large in order to prevent the overturning angle, which limits the lifting capacity. Furthermore, since the locus of the center of gravity is large compared to the lifting capacity, there are various disadvantages such as the need for front gloss, the extension of the actuator, and the stress between the outriggers.

This invention was made in view of the above-mentioned circumstances, and its purpose is to provide a crane base with an arm that can freely rotate in the vertical direction, and to support a counterweight by this arm so that when the vehicle is running, the Counterway)t
- Located low at the rear end of the vehicle body, the counterweight extends in the opposite direction of the boom during work, reducing rolling and pitching while driving, improving safety from rear-end collisions with following vehicles, and further improving safety during work. The purpose is to provide a specially equipped vehicle that can improve the lifting capacity of the vehicle.

This FIi4 will be explained below based on an embodiment shown in the drawings. 1 and 82 show examples of the iris, and 1 is the body of a tiger or a crane. This car body I
K has wheels 2... and outriggers 3, 3 attached to the front, rear, left and right sides.

The vehicle body 1 is provided with a lane base 5 that can freely rotate around a crane rotation center 4, and a telescopic boom 6 is attached to the crane base 5 so that it can be raised and lowered. The rear end portion 5a of the stand 5 protrudes rearward from the rear end portion IJL of the vehicle body 1. In addition, the crane base 5
A support shaft 7.7 that protrudes left and right is provided on the upper part of the support shaft 7.7.
The upper end of 8 is pivotally mounted. The lower ends of these rotating arms 8 extend up to the rear end of the vehicle body 1, and a counterweight 9 is suspended from the tip thereof.

Further, the lower end of a first arm 11.11 constituting the link mechanism 10 is connected to both left and right end surfaces of the counterweight 9, and a pin 12.12 is connected to the upper end of the first arm 11.11. A second arm 13.13 is rotatably connected therebetween. And this second arm 1
The other end of 3゜13 is rotatably connected to both lower walls of the crane base 5, and the bin 12.12 is connected to a drive vertically attached to the upper walls of the crane base 5. For example, the piston port of the hydraulic cylinder 14,
is connected to.

Furthermore, the upper ends of the first arms iJ, xx are provided with a protrusion 16 that protrudes in the direction of extension thereof, and a second arm 73. JJK are engagement holes 17 that face each other during polymerization.
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Therefore, the piston port of the hydraulic cylinder 14.14,
5.15 in the dead state, ts1 diagram, 2nd
As shown by the solid line in the figure, the 1st 1st and 2nd arms 11, 11
, 13.13 are bent at the pins 12.121 as fulcrums, so the counterweight 9 suspended by the rotating arm 8.8 is connected to the rear end 1a of the vehicle body 1, that is, the counterweight 9 is connected to the rear end 1a of the vehicle body 1. kept low.

Therefore, it is possible to lower the center of gravity of the clay vehicle, reduce rolling and pitching during driving, and improve the overturning angle.

From this state, when the piston rods 15, 151 of the hydraulic cylinders 14.14 are extended, the bins 12.12 are pushed down by the piston rods 15, 15. Therefore, the first arm 11011 rotates in the counterclockwise direction using the bin 12.12 as a fulcrum, and rotates in the same direction using the rotating arms 8, 8 as a fulcrum on the support shaft 7°7t. .13 rotates clockwise. For this reason, the counterweight 9FiM suspended by the rotating arms 8, 8
41. As shown by the two-dot chain line in FIG. 41, the crane base 5 is pulled up to the rear, that is, extended in the opposite direction to the game 6. Holding in this state, the first arm 11.1
1 retention hole 17! ! Arm 13 of 2. Retaining hole 1 of 13
8 are facing each other, insert the lock pins 20 and 20f into the retaining holes 17 and 18, and insert the tips of the lock pins into the retaining holes 19 and 19.
．． 19, the first arm 11.11 and the
Arms 13.13#i - are connected in a straight line and can hold the counterweight 9 fixedly. Therefore, the packing moment of the counterweight 9 can be increased, and the lifting capacity can be increased.

FIG. 3 shows a second embodiment of the present invention, in which a winding citram 22 for winding up the sub-wire 21 is used as a driving source in place of the hydraulic cylinder 14. That is, the sub-wire 21 is wrapped around a pulley 23 and then wrapped around the I# take-up tram 22. One end of the sub wire 2 and another pulling wire 24 are wound around the winding drum 22, and the other end is connected to the tip of one of the rotating arms 8 after being wrapped around the pulley 23. There is.

Thus, the winding citram 22 pulls up the wire 2
4, the rotating arm 8.8 and the first arm 11.11 can be rotated clockwise, and the counterweight 9 can be positioned at the i end i1iJm of the vehicle body. By rotating the sitram 22 and winding up the lifting wire 24'ff, the counterweight 9 is pulled up while rotating the rotating arms 8, 8 and the first arm 11.11 counterclockwise, and is moved to the rear of the crane base 5. It can be held in an extended position.

FIG. 4 shows a third embodiment of the present invention, in which a link mechanism 10 supporting a counterweight 9 is different from the above embodiment. That is, 25 is a support arm provided parallel to the rotating arm 8, one end of which is rotatably pivoted to the side wall of the crane base 5 via a pin 26t, and the other end S is connected to the counterweight 9. It is pivotally attached to the end face of. Furthermore, a retaining hole 27 is bored in the longitudinally intermediate portion of the support arm 25, and an engaging hole 28 is bored in the crane base 5 on the rotation locus of the engagement hole 22. . Then, the counterweight 9 is pulled up while the winding drum 22 rotates the wide rotation arm 8 and the support arm 25t counterclockwise to take up the wire 24, and when the engagement hole 27 faces the engagement hole 28. A fixed bin (not shown) is inserted and the counterweight 9 is attached to the crane base 5.
It is designed so that it can be held in a state where it extends backwards.

FIG. 5 shows an embodiment of jI4 of the present invention, in which a counterweight 9t and a support arm 25 that supports it are different from the above embodiments. In other words, 29 is a support arm, one end of which is connected to a crane via a bin 3o. It is pivotally connected to the rear end 5a of the base 5, and the other end is pivotally connected to the end surface of the counterweight 9. Therefore, when the counterweight 9 is pulled up while rotating the rotating arm 8t counterclockwise by winding the lifting wire 24, the support arm 29 rotates in the same direction using the bin 30 as a fulcrum, as shown by the solid line. (counterway) 9t - Can be held in a state extending to the rear of the crane base 5.

In addition, in the second to fifth embodiments described above, the same constituent parts aliQ as in the first embodiment are given the same numbers and their explanations will be omitted.

In addition, in each of the above embodiments, a truck and a crane were described, but the invention is not limited to these, and can be applied to a vehicle equipped with a counterweight such as an excavator, a crane, a grooder, an aerial work vehicle, a fire engine, or a rough crane. Applicable.

As explained above, this invention has a crane base with an arm that can freely rotate in the vertical direction, supports a counterweight by this arm, and connects the arm with a drive source, so that when the vehicle is running, the counterweight is )1
- It is located at a low point at the rear end of the vehicle body, and is characterized in that it extends in the opposite direction to the counterway (1) and the boom during work. Therefore, the following various effects can be achieved.

(When driving) (a) Low 1 no c! Since the maximum inclination angle can be increased, pitching and rolling are reduced and stability is improved.

(b) The weight of the counterweight and the rearward extension length IliilM from the crane base make it possible to distribute the lids and reduce the number of models produced.

(c) If the center of gravity of the vehicle is close to the center of gravity of the crane, the moment of inertia is small, improving riding comfort.

) The rear overhang is smaller, the vehicle distance from the following vehicle is increased, improving safety, and even in the event of a rear-end collision, the body of the following vehicle will first collide with the counterweight and then the human body will be affected. The number of accidents resulting in injury or death can be reduced.

(during work) (e) The packing moment of the counterweight can be increased, and the weight of the counterweight can also be increased.
It is possible to increase the lifting capacity and extend the boom.

(F) When the lifting capacity is the same as the conventional one, the present invention has a smaller center of gravity trajectory than the conventional one, as shown in Figure 6. Therefore, there is no need for a front lock, the outrigger extension is small, the stress of the front frame and outrigger is small, the front frame and the outrigger frame are small, the frame can be made more compact, and the weight of the counterweight is reduced. It will be done.

[Brief explanation of drawings]

1 and 2 show a first embodiment of the present invention, FIG. 1 is a side view of the truck crane, FIG. 2 is a rear front view of the same, and the third factor is the second embodiment of the present invention. FIG. 4 is a schematic side view showing a third embodiment of the invention, FIG. 5 is a schematic side view showing a fourth embodiment of the invention, and FIG. 6 is a schematic side view showing a fourth embodiment of the invention. The figure is a schematic plan view of the tiger, Kukrane, showing the locus of the center of gravity. DESCRIPTION OF SYMBOLS 1...Vehicle body, 5...Crane base, 6...Boom, 8...Rotating arm (arm), 11...First arm (arm), 13...Second arm arm (arm),
9... Counterweight, 14... Hydraulic cylinder (drive source), 22... Winding drum (drive source).

Claims (1)

[Claims] In a specially equipped vehicle equipped with a counterweight at the rear end of the vehicle body, which is equipped with a crane base that holds the boom in an adjustable manner, the crane base is equipped with an arm that can freely rotate in the vertical direction. In addition to supporting the weight, the arm is linked to a drive source, and is positioned at a low rear end of the vehicle body when the vehicle is running, and extends the counterweight in the opposite direction to the boom during work. Specially equipped vehicle with special features.