JPS5842184Y2 - Dump equipment for steel slag transport vehicles, etc. - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a dumping device for a steel slag transport vehicle or the like that dumps beyond the dead center.

Conventional dumping devices of this type operate by rotating the dump arm directly with the hoist cylinder, so the dumping force can only be obtained by increasing the oil pressure or increasing the inner diameter of the cylinder. can't do it
Also, since the dump angle is determined by the cylinder stroke, a long stroke is required to obtain a perfect dump angle. For example, the present invention aims to provide a dump device in which the inner diameter of the cylinder can be made small, and the stroke of the cylinder can be shorter than the conventional cylinder stroke in order to obtain the same dump angle as before.

The configuration of the present invention will be explained below with reference to the drawings.

In the figure, 1 is the chassis of a steel slag transport vehicle, and 2 is a dump arm supported on both sides of this chassis 10 so as to be rotatable in the front and rear direction. A matching trunnion support 5 is provided.

Reference numeral 6 denotes a hoist cylinder for rotating the dump arm 2, the base end of which is pivotally supported on the vehicle platform 1 side.

On the other hand, one end of a link 7 is pivotally supported near the pivot point P of the dump arm 2, and an intermediate portion of an auxiliary cylinder 8 is pivotally supported at the intermediate portion of the dump arm 2. The tip of the piston rod 9 and the tip of the link 7 are rotatably connected to the tip of the piston rod 10 of the hoist cylinder 6 by one pin 11.

The auxiliary cylinder 8 has a piston 9a as shown in FIG.
The compartments ``8a'' and ``ab'', which are partitioned by ``8a'' and ``ab'', communicate with each other via a throttle valve 12.

In the above configuration, when the hoist cylinder 6 is extended and the dump arm 2 is operated for dumping, the arm 2 and the steel slag 3
When the center of gravity of the dump arm 2 exceeds the pivot point P of the dump arm 2, the auxiliary cylinder 8 is pulled and begins to extend.

The elongation speed at this time is controlled by the throttle valve 12.

By adjusting this throttle valve 12, it is also possible to change the speed according to the work.

When loading steel slag 3 on the ground, the above movement is reversed, and when the center of gravity exceeds the pivot point P, the auxiliary cylinder 8 begins to slowly contract and returns to its original position.

The force required when loading the steel slag 3 is the product (moment) of the thrust of the hoist cylinder 6 and the distance to the line of action of the thrust on the rotation fulcrum PK of the arm 20. By using a cylinder, the distance can be increased, the above-mentioned moment becomes larger, and heavier objects can be loaded than before, and if the weight is the same as before, the oil pressure should be lowered or the cylinder inner diameter should be increased. Can be made smaller.

In addition, in the conventional case, the 60 stroke of the hoist cylinder had to be lengthened due to the increase in the above distance, but with the above configuration, the dump angle increases by the 80 stroke of the auxiliary cylinder, and the 60 stroke of the hoist cylinder is almost the same as before. It can be the same as, or on the contrary, shorter.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a side view;
FIG. 2 is a sectional view taken along the line ■--■ in FIG. 1 is a chassis, 2 is a dump arm, 3 is steel slag, 6 is a hoist cylinder, 7 is a link, 8 is an auxiliary cylinder, 8a, 8
b is the chamber, 9.10 is the piston rod%, 9a is the piston, and 12 is the throttle valve.

Claims (1)

[Scope of utility model registration request] One end of the link 7 is connected to a dump arm 20 which is rotatably supported by the vehicle chassis 1 near the rotation fulcrum P, and two chambers 8a, ab are partitioned by a piston 9a in the middle of the dump arm 2.
An auxiliary cylinder 8 which is connected through a throttle valve 12 is rotatably supported, and the piston rod 9 of the auxiliary cylinder 8, the tip of the link 7, and the tip of the piston rod 10 of the hoist cylinder 6 are coaxial. A dumping device for a steel slag transport vehicle, etc., characterized in that the two are connected together.