JPH065205Y2 - Traveling equipment such as wheel cranes - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a traveling device such as a wheel crane.

[Prior Art] In a wheel crane, in order to secure the grounding properties of the four wheels during traveling, front shaft swing-rear shaft lock or front shaft lock-rear shaft swing is performed.

Since the shaft on the rocking side needs to be fixed when the tire is suspended or when the tire is traveling in suspension, conventionally, as shown in FIG. 4 and FIG. The chassis frame b has a narrow width, and the lock cylinders d and d arranged on both side surfaces of the narrow portion c allow the chassis frame b
The supporting plates e, e provided on the upper part of the swing shaft a pivotally attached to the base plate are pressed to fix the swing shaft a.

[Problems to be Solved by the Invention] However, in such a conventional axle lock, the chassis frame b is provided only for the left and right lock cylinders d.
Is narrow, the cross-sectional area is small and the mechanical strength such as twisting is low.

[Means for Solving the Problems] In order to solve the above-mentioned conventional problems, in the present invention, a swing shaft having wheels at both ends, and receiving plates provided on the left and right upper surfaces of the swing shaft. A chassis frame having a width slightly narrower than that of the swing shaft pivotally supporting an intermediate portion in the longitudinal direction of the swing shaft, and piston rod holes penetrating from the upper surface of the chassis frame toward the receiving plates. A lock cylinder having a hollow structure, which is opened downward and is installed on the upper surface of the chassis frame so as to cover each piston rod hole, and a piston slidably inserted in each lock cylinder in a vertical direction, The piston rod is inserted into each piston rod hole and has an upper end fixed to each piston.

[Operation] When the tire is suspended or when the vehicle is suspended and suspended, the rods of the lock cylinders are projected so that the rods penetrating the chassis frame press the support plate of the swing shaft from above, so that the swing shaft is fixed. , Stability is improved.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

1 to 3 show an embodiment of the present invention.
Is a chassis frame, 2 is a swing shaft, 3 is a drive shaft, and 4,4
Is a wheel, and the swing shaft 2 is attached to the brackets 5 and 5 and the pin 6
Is pivotally attached to the lower portion of the chassis frame 1, and the receiving plates 7 and 7 are fixed to both upper portions of the swing shaft 2 at required intervals. In the above, the width of the chassis frame 1 is made slightly narrower than the inner width of the wheel 4, and is substantially the same as the outer width of the receiving plates 7, 7.

Piston rod holes 8 and 8 penetrating in the vertical direction are formed in the chassis frame 1 above the receiving plates 7 and 7, and pistons 13 and 13 are formed.
A relatively long piston rod 10, 10 fixed to the lower surface of the above is inserted into the piston rod hole 8, 8 from above so that its lower end is located below the chassis frame 1, and has a hollow structure with an open bottom. The pistons 13, 13 are slidably inserted in the lock cylinders 9, 9 in the vertical direction, and the lower portions of the lock cylinders 9, 9 are attached to the upper surface of the chassis frame 1, respectively. The upper end and the inner parts of the lock cylinders 9, 9 form cylinder chambers 12, 12.

In the present embodiment having the above-mentioned configuration, when the tire is suspended or the suspension is run, the cylinder chambers 12, 1
When pressure oil is supplied to 2, the pistons 13, 13 and the piston rods 10, 10 are projected downward, and the piston rods 10, 10
Moves down in each piston rod hole 8,8 and its tip presses each receiving plate 7,7.

Therefore, the rocking shaft 2 has lock cylinders 9 and 9 on both sides from above.
It is fixed because it is supported by. This stabilizes the tire suspension or suspension traveling.

Further, the piston 13 can be inspected and serviced simply by removing the lock cylinders 9, 9 and the labor required for the maintenance can be reduced.

Incidentally, the traveling device such as the wheel crane of the present invention is not limited to the above-described embodiments, and it goes without saying that various modifications can be made without departing from the scope of the present invention.

[Advantages of the Invention] As described above, according to the traveling device such as the wheel crane of the present invention, the lock cylinder is disposed on the upper surface of the chassis frame, and the swing shaft is moved by the piston rod penetrating the chassis frame. Since it is supported and fixed, it is not necessary to narrow the chassis frame in the swing shaft portion as in the conventional case, and the cross-sectional area of the swing shaft portion is increased, so that the mechanical strength is increased. Therefore, it is possible to obtain an excellent effect that the labor required for inspection and maintenance of the piston can be reduced.

[Brief description of drawings]

FIG. 1 is an explanatory view of an embodiment of the device of the present invention, FIG. 2 is a view taken along the line II--II in FIG. 1, FIG. 3 is a detailed view of the lock cylinder in FIG. 2, and FIG. FIG. 5 is a view showing an example of a conventional traveling device, and FIG. 5 is a view taken in the direction of arrows VV in FIG. 1 is a chassis frame, 2 is a swing shaft, 7 is a receiving plate, 8 is a piston rod hole, 9 is a lock cylinder, 10 is a piston rod, and 13 is a piston.

Claims (1)

[Scope of utility model registration request] 1. A swing shaft having wheels at both ends, support plates provided on upper and left upper surfaces of the swing shaft, and a swing shaft slightly narrower than a swing shaft pivotally supporting an intermediate portion in the longitudinal direction of the swing shaft. A chassis frame having a width, a piston rod hole penetrating from the upper surface of the chassis frame toward the receiving plates, respectively, and a lower opening and covering the piston rod holes on the upper surface of the chassis frame. A hollow lock cylinder attached, a piston slidably inserted in each lock cylinder in the vertical direction, and a piston rod inserted into each piston rod hole and having an upper end fixed to each piston. A traveling device such as a wheel crane characterized by being provided.