DE680557C - Locking device for the ram of lifting platforms - Google Patents

Description

Locking device for the ram of lifting platforms The invention refers to locking devices for the rams of lifting platforms with the help a clamp from two hinge-like connected clamps mounted at the end of the cylinder Share. The known locking devices of this type have the disadvantage that they were only fixed at their joint on the stage cylinder, causing jamming the clamp, especially when extending the ram, can occur and also one-sided wear of the tensioning inner surfaces of the clamp caused is, so that the safe effect of the locking device is soon called into question is.

According to the invention, this deficiency is eliminated in that the with a brake lining provided clamping clip parts against lifting from the cylinder end in. vertical direction through the head of pivoting in the horizontal direction approved fastening screws are secured.

Such a locking device according to the invention is for one and two-post platforms are equally suitable. You can also do without further can be provided on existing lifting platforms.

In the drawing, the subject matter of the invention is shown in an exemplary embodiment. Fig. I is a view with partial section, Fig. A is a partial plan view thereof and Fig. 3 is a section along line AB of Fig. A on an enlarged scale. `In cylinder a, piston b works; on which the locking device according to the invention acts. The same comprises a split clamp c, the parts of which are connected by a hinge d. The clamp c is screwed onto the flange f1 of the stuffing box f by means of the fastening eyes B. The holes in the fastening eyes e for the fastening screws g are held wider than the diameter of the screw bolt or the Bundesgl on the screw bolt, while the collar g1 in its The height is such that when the screw g is tightened, the fastening eyes e can move freely in accordance with the pivoting movements of the clamping clamp sections (Fig.3).

The clamp e is on its inside with a brake lining h provided, which is also divided according to its parts and by the clamp c is pressed against the outside of the piston.

The tensioning clamp c is tensioned from a tensioning shaft i, which carries a threaded bolt at one end; the one on the clamp parts attached flap acts and the same according to his sense of rotation in a known manner contracts or loosens. The expansion shaft i is thereby rotated by a lever l offset that the shaft i at some distance from its opposite to the threaded bolt k directed end has a hexagon il or a similar profile piece on which part of the appropriately designed hub of the lever l sits down. The lever l is on the end i = of the shaft protruding beyond the hexagon il! in their axial direction displaceable, the shaft end i ° being dimensioned so that the lever l after pulling it off from the hexagon il loosen on the same is pivotable.

The expansion shaft i is mounted in the concrete reinforcement m; tt is a wiper ring connected to the tensioning clamp for wiping off dirt particles from the outer surface of the punch.

The training of the expansion shaft! and their drive as well as the arrangement the scraper ring are not the subject of the invention.

Claims (1)

PATENT CLAIM- Locking device for the ram of lifting platforms, consisting of a clamp mounted on the cylinder end -of two parts connected in a hinge-like manner; characterized in that the clamping clip parts (c) provided with a brake lining (h) are secured against lifting from the cylinder end in the vertical direction by the head of fastening screws (g) which permit pivoting in the horizontal direction.