DE1068872B - - Google Patents

Description

GERMAN

In ιItT ilen 'of TIauptpatents forming SelnvenkbiiIine iegenstand is between below the Scliwcnkbiiline disposed actuating cylinder and the Schwcnkbiiline interposed a continuously variable silent ratchet, the effectiveness of both 5 enters any kind interrupt' the actuation of the lowering of the swivel stage as well as from the cylinder force exceeding load of the Swivel platform is dependent.

In the subject of the additional patent, the clamping lock is designed as a hydraulic lock and equipped with a brake piston working as a drag piston in a working cylinder, whereby according to the invention, the device that interrupts the fluid circulation of the lock and blocks the brake piston has a valve acted upon by the drive pressure medium of the swiveling platform, which has such the liquid circulation of the locking mechanism controls that it is kept open by the drive means of the swivel stage, driving means when the pressure drops, the on below a set level and in case of failure of the pressure medium is closed by spring force.

Hie application of a hydraulic locking mechanism, wherein the liquid circulation is regulated by a directly influenced by the driving pressure fluid control valve in place of a mechanical Klemmgesperres, has the advantage of a particularly large SEN Betriebssiclierhcit undVereinfachungderSchwenkbühnenkonstruktion. by designed as a drag piston Bremskolbcn forcibly executes the movement of the swivel stage, as long as the drive means for actuating the pivoting stage stone available while it is at eggs interruption of the operation of the swivel stage due to the failure of the on triebsdruckmittcls immediately by the interruption of Firissigkeitsunilaufs lilockiert.

The fitting of the hydraulic lock instead of a mechanical locking lock in the air operated one Swiveling platform can be made in such a way that the brake cylinder containing the brake piston upstream of the pneumatic cylinder for actuating the swivel platform and the piston shaft of the Brciiisknlberis is passed through the brake cylinder and as a piston rod with the actuating piston for the swivel platform is connected. The cylinder receiving the Firenis piston can, however, also be arranged laterally next to the working cylinder for actuating the Sehwenkbiilme and the piston shaft of the brake piston attack directly on the swivel platform.

According to a further embodiment of the invention, the relative movement of the brake piston is limited the locking mechanism on the Kolbeuscliaft on one side

Pneumatically operated swivel platform

Addendum to patent 943 316

Applicant:

Hermann Hemscheidt machine factory,
Wuppertal-Elberfeld, Bornberg 103

Siegfried Liebe, Wuppertal-Elberfeld,
has been named as the inventor

Side of the brake piston has a damping plate made of ela elastic material and on the other side a cover that shuts off the passage of the liquid through an axial bore of the brake piston and is fixedly provided on the piston shaft. The hood of the piston skirt engages with an annular conical surface in a circular groove of the drag piston, the conical surface resting against a corresponding ring seal of the drag piston. Is According to let the pressure of the swivel stage lowering air pressure of the fluid circulation of the locking mechanism is interrupted, the brake piston, is prevented from performing an upwards movement by the fixedly arranged on the piston skirt hood so engages the Schlcppkolben, the Fliissigkeitsdurchgang Dall closed by the axial bore is: this blocking prevents the swivel platform from resting on the turntable. As soon as the blockage has been removed by the valve control and the hood has detached itself from the drag piston, the sliding piston hits the damping plate made of elastic material during its further relative movement, so that impacts are avoided.

The blocking of the liquid run in an oil pressure cylinder, a so-called Katarakibreni.-e, serving as an abutment for a Stahlglieilerbaiiil, is already known. The shut-off takes place via a short-circuit Ieit un switched on check valve, which is arranged on the piston side at which a pressure increase to break off the movement is to occur when the movement process occurs . In this case, however, the shut-off of the liquid circulation is not influenced by the pressure drop or the failure of the drive pressure device causing the movement.

909 648/86

Claims (3)

In the case of tilting platforms, it is also known to delay the movement of the tilting platform by arranging hydraulically operating damping devices, although the effect of a locking mechanism is not achieved, since the throttling of the liquid only passes through one because the lowering of the swivel platform results in a delayed damping, but not in a blocking which prevents the lowering. The drawing shows an exemplary embodiment of the hydraulic clamping lock for the pressure-actuated swiveling platform in the event that the hydraulic locking mechanism is in a stacked arrangement with the pneumatic working cylinder of the swiveling platform, namely in FIG. 1 in a blocked state and FIG. 2 in condition that does not interrupt the fluid circulation. The cylinder 13 of the hydraulic locking mechanism, which is pivotably suspended at point 12 in a known manner, is provided with a brake piston 15, which slides on the piston shaft 14 between limits and is designed as a drag piston, which, like the working cylinder 2 of the main patent (not shown), works in an approximately vertical position. The two working spaces 16 and 17 of the cylinder 13 are connected to the outside by a line 18 in which a piston slide 19 is switched on as a valve. which is on the one hand under the pressure of a spring 20 and on the other hand is acted upon by the compressed air serving as the drive means for the working piston 3 of the swivel platform, not shown, according to the main patent. The lower limitation of the drag piston 15 is provided by a damping plate 21 made of elastic aluminum and arranged on the piston skirt 14, while the upper limitation of the relative movement of the drag piston 15 is provided by a hood 22 fixedly arranged on the piston skirt 14. The hood 22 is provided with an annular conical surface 23 which, when blocked, engages in a circular groove of the drag piston 15 and rests against a corresponding ring seal 24 of the drag piston and thereby prevents the fluid from flowing through the axial bore of the drag piston. Instead of being arranged next to one another, the cylinder 13 can be positioned between the swiveling platform working cylinder 2 (not shown) and the swiveling platform! to be on. The piston shaft 14 is then extended on the other side of the brake piston 15 and connected to the working piston 3 of the actuating cylinder 2 of the swiveling platform. : ν ι; fen 1: 1. 1 approved swivel platform according to l 'a ' .eiu "43 310 with a.» UuVnl ".seii>. ^: e. »j» errc. de.-.- en Effectiveness occurs when the actuation of the aluminum lowering of the swivel platform is interrupted, whereby • La, - ι reading lock is equipped with a:, work as push-buttons in a hydraulic working cylinder ·! en 1 Ircin .-- kolbeii . characterized in that the line device which interrupts the fluid circulation of the Gesnerres and thereby blocks the brake piston (15) is a v. > Has a spring-loaded valve (16, 19, 20) which is acted upon in the drive pressure means of the swiveling platform and which controls the fluid circulation of the locking mechanism in such a way that! there, - the valve is kept open by the aturiebsdruckmittel of the swivel platform and when the pressure of the drive means drops below a set level or if the pressure means fails, it is closed by the force of its spring 1 20>. 2. Pneumatic swiveling platform according to claim 1, characterized in that 1.1 to limit the relative movement of the drag piston 115) on the piston shaft (14i on one side of the void a damping plate (21) made of elastic material and on the other piston side one the passage of the Fluid is provided through an axial bore of the towing piston shut-off on the Kolbeiischafi permanently arranged Iiaube 1 .22 .1 . 3. Compressed air operated swivel platform according to claims 1 and 2, characterized in that dan the hood (22) with an annular Kouusfläc (23) against a corresponding ring seal (24) nasty drag piston in the ab-clilussstelluiig of the faucet. Considered publications:
German patents Xr. 819 064.664 134.
316. 1 sheet of drawings O 909 648/86 11:59