JPS6224358B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a crane vehicle that can lift and carry heavy objects, and particularly relates to a crane vehicle that can efficiently distribute weight when lifting heavy objects.

[Conventional technology]

Traditionally, crane vehicles with a crane mechanism fixed on a self-propelled vehicle body have been widely used to lift heavy objects and move them to a predetermined location, or to lift heavy objects to stack cargo. . This crane vehicle is equipped with a post, which is the base of the crane mechanism, near the center of the vehicle, allowing the arm to move up and down and the post to rotate, giving it the freedom to move the lifted heavy objects. In order to lift heavy objects, this crane vehicle is preferably designed so that the center of gravity is at a position opposite to the heavy object to be lifted.If the center of gravity is far back from the center of the crane mechanism, it is possible to increase the center of gravity for lifting. can. However, if the post is attached to the center of the car body, the distance between the center of the crane mechanism and the center of gravity cannot be increased.If the post is attached to one end of the car body and the distance between the center of gravity and the center of the crane mechanism is increased, Although it is possible to hang a heavy object at the front, if you invert the arm and suspend a heavy object at the rear of the vehicle, the center of gravity will be located at the rear, causing the vehicle to tip over. Conventional crane vehicles naturally have limitations on the weight of objects they can lift.

[Problem that the invention seeks to solve]

In view of the above-mentioned drawbacks, the present invention installs the crane mechanism and heavy equipment at opposite positions on the vehicle body, and positions the center of gravity of the vehicle body at the rear, thereby increasing the weight of the objects to be suspended. When the crane mechanism is rotating, it is rotated on two axes so that the length of the crane mechanism is absorbed by the inside of the swivel base, and the moment is reduced by reducing the length from the side of the car body to the crane mechanism. To provide a crane vehicle that can increase the weight lifted by a mechanism.

[Means for solving problems]

The present invention provides a movable vehicle body, a swivel base mounted on the vehicle body so as to be able to rotate slightly horizontally, and with the center of the vehicle body as the center of rotation, and a swivel base located at a position offset from the center of rotation of the swivel base. A workbench rotatably placed on a swivel table as a rotation center, a crane mechanism provided on the workbench, a drive mechanism, a tank, and other heavy equipment provided on the opposite side of the swivel table from the workbench,
A synchronization mechanism that is interposed between the swivel table and the work table to rotate the work table in the opposite direction to the rotation direction of the swivel table, and also to rotate the work table synchronously at twice the rotational speed of the swivel table. The present invention provides a crane vehicle characterized by comprising:

[Effect]

In the present invention, the crane mechanism and the heavy machine are located at opposite positions on the swivel table, with the center of gravity located at the rear, and the weight distribution is reversed, making it easier to lift heavy objects with the crane mechanism. If you try to turn a heavy object while it is lifted by the crane mechanism, the work platform will rotate in the opposite direction to the swivel table and at twice the rotation speed, so the heavy object will pass through the side of the vehicle body, and as it passes The crane mechanism does not protrude significantly from the side of the vehicle body, allowing it to absorb moment loads. For this reason, when a lifted heavy object is placed on the side of the car body, the long crane mechanism passes through the central axis of the swivel platform, and instead of protruding from the side of the car body, it is pulled towards the car body. can prevent falls.

〔Example〕

An embodiment of the present invention will be described below.

Figure 1 is a side view of this embodiment, Figure 2 is a front view,
FIG. 3 is a plan view. This crane vehicle is self-propelled, and wheels 11 are pivotally supported at the four corners of the lower surface of a flat vehicle body 10, and endless tracks 12 are provided between each pair of wheels 11 on both sides of the vehicle body 10. An annular support plate 13 is fixed to the center of the upper surface of the vehicle body 10, and a deformed octagonal swivel table 14 is mounted on the support plate 13.
is rotatably supported in the horizontal direction. Swivel base 1
4 has a planar shape obtained by cutting out each vertex of an equilateral triangle, and is located behind the swivel base 14 (left side in Figures 1 and 3).
The engine 1 is installed at the top along the periphery of the swivel base 14.
5. A fuel tank 16 and a hydraulic oil tank 17 are mounted, and a hydraulic motor 18 is fixed at a position slightly closer to the fuel tank 16 than the center of the upper surface of the swivel base 14 with its drive shaft facing downward. . An annular holding plate 19 is mounted and fixed on the upper part of the front side of the swivel table 14 (right side in Figs. 1 and 3), and the center axis of the above-mentioned support plate 13 and this holding plate 19 It is horizontally offset from the central axis of , and positioned so that both axes are parallel to each other. A circular workbench 20 is rotatably supported on the holding plate 19, and a mast 21 is fixed slightly perpendicularly to the workbench 20. An arm 22 is connected by a pin 23 so that it can rotate in the vertical direction, and an arm 24 is connected to the tip of the arm 22 by a pin 25 so that it can rotate in the vertical direction. A boom 26 that can slide in the length direction is inserted into the tip of the arm 24, a hook 27 is fixed below the tip of the boom 26, and a hydraulic cylinder 28 is installed between the mast 21 and the arm 22. A hydraulic cylinder 29 is also interposed between the arms 22 and 23. The mast 21, arms 22, 23, boom 26, etc. form a crane mechanism. Further, a passenger platform 30 made of a steel plate bent into an L shape is fixed to one side of the mast 21, and a seat 31 and a control box 32 are fixed to the passenger platform 30.

Next, FIG. 4 shows the turning mechanism in this embodiment in detail, and corresponds to the sectional view taken along the line AA in FIG. 3. A circular driving gear 33 having approximately the same outer diameter as the supporting plate 13 and having a tooth profile cut on its inner periphery is fixed on the support plate 13 described above, and a bearing 34 is mounted on the outer periphery of this driving gear 33. A ring-shaped slider 35 is rotatably fitted therebetween, and the swivel base 1 is mounted on the upper surface of this slider 35.
4 is fixed, and the swivel base 14 is attached to this driving gear 3.
It can be rotated around 3. A pinion 37 is rotatably attached to the output shaft 36 of the hydraulic motor 18, and the pinion 37 is meshed with an internal tooth surface of the driving gear 33. Further, an L-shaped shaft support piece 38 is fixed to the inner peripheral surface of the driving gear 33 on the lower surface of the swivel base 14, and bearings 39 and 40 are provided on this shaft support piece 38 and the swivel base 14, respectively. The intermediate shaft 41 is supported by both bearings 39 and 40 and penetrates the upper and lower surfaces of the swivel base 14.
A pinion 42 is fixed between the shaft support piece 38 of the intermediate shaft 41 and the swivel base 14, and the pinion 42 meshes with the inner tooth surface of the drive gear 33. Further, a ring-shaped shaft support 43 having an outer diameter approximately the same as that of the holding board 19 is fixed on the holding plate 19, and the inner circumference of the shaft support 43 is annular and has an outer diameter. A driven gear 45 having a tooth profile cut and formed on the inner periphery is located approximately at the inner diameter of the shaft support 43, and a bearing 44 is interposed between the shaft support 43 and the driven gear 45. The aforementioned workbench 20 is placed and fixed on the upper surface of this driven gear 45, and the workbench 20
can rotate about the central axis of the shaft support 43 as its rotation center. Further, a pinion 46 is fixed to the upper end of the intermediate shaft 41,
This pinion 46 meshes with the inner peripheral tooth surface of the driven gear 45. In addition, FIG. 5 is an exploded perspective view of the rotating member of this turning mechanism, and FIG. 6 is a plan view showing the positional relationship of the rotating member same as above.

Next, the operation of this embodiment will be explained.

First, when suspending heavy objects, use the seat 31
The hydraulic cylinders 28, 29 and the arm 24 are activated by operating the levers of the control box 32.
The horizontal height position of the arm 24 is set by respectively extending and contracting the hydraulic cylinders (not shown) inside, rotating the arm 22 around the pin 23, and rotating the arm 24 around the pin 25. and,
The boom 26 is slid by a hydraulic cylinder in the arm 24 to set the position of the hook 27 above the object to be lifted, and a wire or the like is hooked onto the hook 27.
Next, by extending and contracting the hydraulic cylinders 28 and 29, the arms 22 and 24 are raised to suspend the object to be lifted in the air, and by rotating the arms 22 and 24 and extending and contracting the boom 26 relative to the arm 24, the object to be lifted is lifted. The lifted object can be moved to a predetermined location, and the lifted object can be unloaded onto the loading platform of a truck, a cargo collection area, etc. by reversing the procedure described above. When this crane mechanism is lifting a heavy object, the crane mechanism
The engine 15, fuel tank 1
6. Heavy equipment such as the hydraulic oil tank 17 is located opposite the crane mechanism on the swivel platform 14.
Even when a heavy object to be lifted is hung by the hook 27, the center of gravity is set at the rear of the vehicle body 10, so the balance is maintained, so even a relatively heavy object can be hung without falling over. Figure 7 shows this weight distribution.
5. If the total weight of heavy equipment A such as the fuel tank 16 and hydraulic oil tank 17 is W1, and the weight of the object B to be lifted is W2, then both weights are from the center of the vehicle body 10 to the weights W1 and W2, respectively. The weight of equipment A is equal to the weight of vehicle body 1.
It is known that it is advantageous to increase the weight of the object B to be lifted if it is concentrated and deviated from the center of zero.

Next, the swivel table 14 is rotated, and the object to be lifted is suspended by the crane mechanism, or without being suspended, the direction in which the crane mechanism is facing is adjusted to the vehicle body 1.
0, when hydraulic pressure is supplied to the hydraulic motor 18, the output shaft 36 rotates, the pinion 37 rolls on the internal tooth surface of the drive gear 33, and the slider 35 is moved around the outer circumference of the drive gear 33. Rotate along. As a result, the swivel base 14 fixed to the slider 35 rotates about the central axis of the drive gear 33. When the swivel base 14 rotates, the pinion 42 is rotated along the internal tooth surface of the drive gear 33 because the intermediate shaft 41 is pivotally supported on the swivel base 14, and the pinion 42, the intermediate shaft 41, and The connected pinion 46 is connected to the swivel base 1
It will be rotated in proportion to the turning amount of 4. As this pinion 46 is driven and rotates, the driven gear 45 meshed with the pinion 46 is rotated, and the driven gear 45 rotates along the inner circumference of the shaft support 43 in a direction opposite to the direction of rotation of the swivel base 14. It will rotate. Therefore, the work platform 20 fixed to the driven gear 45 and the crane mechanism also rotate in the opposite direction to the swivel base 14, and the arms 22, 24, boom 26, and hook 27 protruding from the mast 21 rotate on the swivel base 14.
A boom 2 is located above the mast 21 to the rear of the engine 15 at the side of the vehicle body 10.
6 will protrude toward the rear of the vehicle body 10. Even with this backward-facing crane mechanism, the heavy engine 15 and fuel tank 1 are similar to those mentioned above.
6. The front position of the hydraulic oil tank 17 etc. is changed,
Even when lifting a heavy object, the center of gravity is located in the front, so even relatively heavy objects can be lifted while maintaining stability.

〔Effect of the invention〕

Since the present invention is configured as described above, when lifting a heavy object in front of the vehicle body using the crane mechanism, the heavy equipment is located at the rear of the vehicle body, that is, at a position opposite to the crane mechanism. The center of gravity can always be set in the opposite direction to the direction the crane mechanism is facing. Therefore, even a relatively heavy object to be lifted can be suspended in a well-balanced manner. When rotating the swivel table while lifting the object to move the object to the rear of the vehicle, the work platform rotates in the opposite direction to the swivel table and at twice the speed. is moved closer to the side of the vehicle. Therefore, the distance of the lifted object from the center of gravity of the vehicle body is shortened, and the distribution of moment is reduced, making it less likely to fall. Further, when the suspended object is turned, the suspended object approaches the side of the vehicle body, so a large space for turning work is not required, and the hanging object can be turned in a narrow work space.

[Brief explanation of the drawing]

Figure 1 is a side view showing one embodiment of the present invention, Figure 2 is a side view showing one embodiment of the present invention;
The figure is a front view of the same as above, Figure 3 is a plan view of the same as above, and Figure 4 is a front view of the same as above.
The figure is a sectional view taken along arrow A-A in Figure 3 showing the turning mechanism in detail, Figure 5 is an exploded perspective view showing the configuration of the turning mechanism, Figure 6 is an explanatory diagram showing the arrangement of the turning mechanism, FIG. 7 is a skeletal diagram showing the positional relationship of the centers of gravity. 10...Vehicle body, 14...Swivel platform, 20...Workbench.

Claims (1)

[Claims] 1. A movable vehicle body, a swivel platform placed on the vehicle body so that it can rotate slightly horizontally, with the center of the vehicle body as the center of rotation, and a position offset from the center of rotation of the swivel platform as the center of rotation. A workbench rotatably placed on a swivel, a crane mechanism installed on the workbench, a drive mechanism installed on the opposite side of the swivel from the workbench, heavy equipment such as tanks, and a swivel. Consists of a synchronizing mechanism that is interposed between the workbench and rotates the workbench in the opposite direction to the rotational direction of the swivel table, as well as synchronously rotating the workbench at twice the rotational speed of the swivel table. A crane vehicle characterized by: