JPH0124070Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to an undercarriage device for a wheel-suspended crane vehicle.

BACKGROUND TECHNOLOGY The frame structure of a conventional wheel-suspended crane vehicle is a revolving frame a whose upper part rotates.
It consisted of a chassis frame b that supported it. Tires d and e and outriggers were both attached to chassis frame b, and were selectively grounded to perform traveling or hanging operations (see Figure 8).

Additionally, wheel-suspended crane vehicles can be used in two ways: high-speed travel and narrow-space entry. On the one hand, the wheelbase must be long for high-speed travel, and on the other hand, the wheelbase must be long for high-speed travel, while the minimum turning radius is small. In order to do so, the wheelbase had to be shortened, which was a trade-off.

Problems that the invention aims to solve As mentioned above, engine c is installed on the chassis frame b side in consideration of the transmission efficiency of running, but for lifting work, the power is transmitted to the revolving frame a side. This required a hydraulic swivel and increased piping length, resulting in poor transmission efficiency.

In addition, with conventional crane vehicles, vehicle specifications had to be determined by compromising both the ability to travel at high speeds and enter into narrow spaces.

The present invention was developed in view of the above circumstances, and its purpose is to enable installation of the power unit 20 on the side of the vehicle body 1, thereby contributing to improved efficiency during lifting work, and to improve high-speed running and narrow spaces. An object of the present invention is to provide a running device for a crane vehicle that can eliminate the trade-offs of entering a location.

Means and Effects for Solving the Problems In order to achieve the above object, the present invention provides an outrigger 3 through a swing circle 2 at the lower part of the vehicle body 1, and connects the outrigger 3 to the outrigger body 4 through the swing circle. 4 in a tomoe shape in the direction of the cutting line of 2
A beam box 5 is provided, and a beam 6 is moved in and out of the beam box 5 by a beam cylinder 7, and a road surface body 14 is attached to the tip of the beam 6 via a jack cylinder 12. The front wheel structure 1 is attached to the front via the front support leg 15.
6 is provided to be movable up and down, and a rear wheel structure 18 is provided at the rear of the vehicle body 1 to be movable up and down via a rear support leg 17. A rear lift cylinder 19 is provided for vertically moving the rear wheel structure 18, and a power unit 20 for extracting power and driving the vehicle is provided on the vehicle body 1 toward the crane 27 mounted on the vehicle body 1, and the outrigger 3 is connected to the wheel base. The front and rear wheel structures 16 and 18 are configured to be installed inside the vehicle during lifting work.
is raised to eliminate interference between the front and rear wheel structures 16, 18 and the outriggers 3 protruding outside the wheel base, and to enable installation of the power unit 20 on the vehicle body 1 side,
Further, by enabling the front and rear wheel structures 16, 18 and the outriggers 3 to selectively touch the ground, it is possible to make a pivot turn, thereby eliminating the trade-off between high-speed running and entering into narrow spaces.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 to 7.

Reference numeral 1 denotes a vehicle body as a revolving frame, and an outrigger 3 is attached to the lower part of the vehicle body 1 via a swing circle 2. The outrigger 3 includes an outrigger main body 4, and the outrigger main body 4 is provided with four beam boxes 5 in a tomb shape in the cutting line direction of the swing circle 2, and a beam 6 is accommodated in the beam box 5 so that it can be taken in and out. It has been done. A slide cylinder 7 is housed within the beam 6, and the base end of the slide cylinder 7 is connected to a connecting pin 9 to a bracket 8 at the bottom of the beam box 5.
The rod 10 of the slide cylinder 7 is connected to the tip of the beam 6 by a connecting pin 11. A jack cylinder 12 is fixed to the tip of the beam 6, and a tread body 14 is attached to a rod 13 of the jack cylinder 12, and these constitute a grounding member A.

Front support legs 15 are attached to the front left and right sides of the vehicle body 1 so as to be able to swing up and down, and the front support legs 15 support a front wheel structure 16.

Rear support legs 17 are attached to the left and right rear sides of the vehicle body 1 so as to be able to swing up and down, and the rear support legs 17 independently support left and right rear wheel structures 18, respectively.

Further, a pair of front lift cylinders 17' are provided at the front side of the vehicle body 1 for vertically moving the front wheel structures 16, and a pair of front lift cylinders 17' for vertically moving the respective rear wheel structures 18 are provided at the rear side of the vehicle body 1. A rear lift cylinder 19 is provided.

The vehicle body 1 is provided with a power section 20. Power part 2
0 includes an engine 21, a power take-off section (PTO) 22, and a transmission section 23, and the output shaft end of the transmission section 23 is connected to the input shaft end of a front axle 25 of the front wheel structure 16 via a constant velocity joint 24. It has been done.

A boom support bracket 26 is fixed to the vehicle body 1, and a first boom body 28 of a boom 27 is attached to the boom support bracket 26 by a shaft pin 29 so as to be able to rise and fall. Further, a boom hoisting cylinder 30 is swingably attached to the vehicle body 1, and a rod 31 of the boom hoisting cylinder 30 is attached to the first boom body 2.
It is connected to a bracket 31' provided at 8 with a pin 32.

The boom 27 is of a center-fold type, and the base boom structure 3
3, a boom structure 34 is bendably connected to the front end of the boom structure 34.

The base boom structure 33 is composed of first, second, and third boom bodies 28, 35, and 36, and the second and third boom bodies 35, 36 extend and contract with respect to the first boom body 28. .

The front boom structure 34 is composed of fourth, fifth, and sixth boom bodies 37, 38, and 39, and the fifth and sixth boom bodies 38, 39 extend and contract with respect to the fourth boom body 37. .

A support bracket 40 is fixedly attached to the tip of the third boom body 36.
The base ends of the boom bodies 37 are connected by pins 41. One end of a link 42 is connected to the support bracket 40, one end of a link 43 is connected to the base end of the fourth boom body 37, and the other ends of both links 42, 43 are connected to each other. A boom cylinder 44 is connected at its base end, and a rod 45 of the boom cylinder 44 is connected to a bracket 46 provided on the fourth boom body 37 by a pin 47.

A sheave 48 is provided at the tip of the sixth boom body 39 of the front boom structure 34, and a hanging hook 49 is hooked with a wire to the sheave 48, and a wire hoisting hook 49 for hoisting and lowering the lifting hook 49 is attached to the vehicle body 1. winch 5
0 is set.

51 is a driver's cab.

Next, the operation will be explained.

The crane vehicle travels using the front lift cylinder 1.
7' is extended to ground the front wheels 52 of the front wheel structure 16, and at the same time, the rear lift cylinder 19 is extended to ground the rear wheels 53 of the rear wheel structure 18, and the power of the engine 21 is transferred to the transmission section 23 at a constant speed. This is done by transmitting the signal to the front axle 25 via the joint 24 and driving the front wheel 52.

For load lifting work, first use beam cylinder 7.
is extended to project the beam 6 outward from the beam box 5, the jack cylinder 12 is extended to bring the tread body 14 into contact with the ground, and the vehicle body 1 is lifted to make the front and rear wheels 52, 53 float above the ground.

Next, the front and rear lift cylinders 17' and 19 are contracted, and the front and rear wheels 52 and 53 are raised via the front and rear support legs 15 and 17 and stored above the upper surface of the outrigger 3.

Next, a swing drive mechanism (not shown) provided in the vehicle body 1 is driven to move the boom 27 and the front and rear wheels 52, 53 together with the vehicle body 1 through the swing circle 2.
Turn the boom 2 and operate the luffing cylinder 30.
7, operate the boom cylinder 44 to raise the front boom structure 34, and then lower the front boom structure 33, 3.
4 first to third, fourth to sixth boom bodies 28, 3
5, 36, 37, 38, and 39 are extended, and the cargo B hung on the hanging hook 49 is handled as shown in FIG.

In addition, when performing a pivot turn, the front and rear wheel structures 1
This is done by driving the swing drive mechanism while keeping 6 and 18 raised.

Effects of the invention Since the invention is as described above, the front and rear wheel structures 16 and 18 are raised during lifting work to eliminate interference between the front and rear wheel structures 16 and 18 and the outriggers 3 protruding outside the wheel base. The vehicle body 1 of the power unit 20
It can be installed on the side, contributing to improved efficiency during lifting work. In addition, front and rear wheel structures 1
6, 18 and the outrigger 3 can be selectively grounded, it is possible to make a pivot turn, and it is possible to eliminate the trade-off between high-speed running and entering into a narrow space.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a crane vehicle equipped with an undercarriage device according to the present invention, Fig. 2 is a plan view of the same, Fig. 3 is a side view of the same, and Fig. 4 is a diagram of a crane vehicle equipped with a power section. 5 is an explanatory diagram of the arrangement of the outrigger device, FIG. 6 is a side view of the same, FIG. 7 is a partially sectional bottom view of the same, and FIG. 8 is an explanatory diagram of the power section of a conventional crane vehicle. 1 is the vehicle body, 3 is the outrigger, 16 is the front wheel structure,
18 is the rear wheel structure, 27 is the crane.

Claims (1)

[Scope of utility model registration request] An outrigger 3 is provided at the lower part of the vehicle body 1 via a swing circle 2, and four beam boxes 5 are provided in the outrigger body 4 in a tomb-like manner in the tangential direction of the swing circle 2, and a beam cylinder 7 is installed in the beam box 5. A beam 6 that can be moved in and out is provided, and a road body 14 is attached to the tip of the beam 6 via a jack cylinder 12, and a front wheel structure 16 is attached to the front of the vehicle body 1 via a front support leg 15. A rear wheel structure 18 is provided at the rear of the vehicle body 1 so as to be movable up and down via a rear support leg 17, and a front lift cylinder 17' and a rear wheel are provided on the vehicle body 1 for vertically moving the front wheel structure 16. Structure 1
A crane 2 mounted on the vehicle body 1 is provided with a rear lift cylinder 19 for vertical movement of the vehicle body 1.
Power unit 2 for power extraction to the 7 side and for driving drive
0 and an outrigger 3 is provided within the wheel base.