CS244181B1

CS244181B1 - Infinitely adjustable hydraulic lowering device

Info

Publication number: CS244181B1
Application number: CS846710A
Authority: CS
Inventors: Vladislav Zejda; Ludvik Kralik
Original assignee: Vladislav Zejda; Ludvik Kralik
Priority date: 1984-09-06
Filing date: 1984-09-06
Publication date: 1986-07-17
Also published as: CS671084A1

Abstract

Plynule stavitelné hydraulické spouštěcí zařízení je určeno především pro dílenské jeřáby, jejichž spouštěcí rychlost je příliě vysoká. Zařízení tvoří hydraulický válec s víkem upraveným pro zavěšení na hák jeřábu. Pístice je vybavena vratnou pružinou a zakončena vázacím hákem a jsou v ní vytvořeny přepoúštšcí kanálky, přerušené škrticím ventilem, které propojují prostor pod a nad pístem. U pístu je vytvořen jednosměrný přepoúštšcí ventil.The infinitely adjustable hydraulic lowering device is intended primarily for workshop cranes whose starting speed is too high. The device consists of a hydraulic cylinder with a lid adapted for hanging on the crane hook. The piston is equipped with a return spring and ends with a tie hook, and there are overflow channels formed therein, interrupted by a throttle valve that connects the space below and above the piston. A unidirectional overflow valve is provided for the piston.

Description

Zařízení tvoří hydraulický válec s víkem upraveným pro zavěšení na hák jeřábu. Pístice je vybavena vratnou pružinou a zakončena vázacím hákem a jsou v ní vytvořeny přepoúštšcí kanálky, přerušené škrticím ventilem, které propojují prostor pod a nad pístem. U pístu je vytvořen jednosměrný přepoúštšcí ventil.The machine consists of a hydraulic cylinder with a lid adapted for hanging on the crane hook. The piston is equipped with a return spring and terminates with a sling hook and there are formed by-pass channels, interrupted by a throttle valve, which connect the space below and above the piston. A one-way relief valve is provided at the piston.

244 181 (51) Int Cl.⁴ 244 181 Int. ⁴

B 66 C 1/34B 66 C 1/34

244 181244 181

Vynález ee týká plynule stavitelného hydraulického spouštěcího zařízení zejména pro dosedací fázi spouštěných břemen zavěšených na jeřábovém háku, na příklad dílenského jeřábu·The invention relates to a continuously adjustable hydraulic lowering device, in particular for the bearing phase of lowered loads suspended on a crane hook, for example a workshop crane.

Spouštěni zavěšených břemen z jeřábů se provádí přímo s využitím převodovek, kde se lano navíjí na otočný buben· Spouštěcí rychlost je u některých jeřábů poměrně velká a v dosedací fázi obtížně regulovatelné takže dochází často k poškození ukládaného předmětu· Zvlášť výrazně se tento* nedostatek projevuje v dílenských provozech, kde často dochází i k poškození stolu stroje,Lowering of suspended loads from cranes is carried out directly using gearboxes where the rope is wound on a rotating drum · The lowering speed of some cranes is relatively high and difficult to control in the bearing phase so that damage to the stored item often occurs. workshops where the machine table is often damaged,

Claims

· This * deficiency is particularly pronounced in workshop operations, where the machine table is often damaged, where the workpiece is to be machined. · There is also the risk of injury to the worker who ensures accurate seating of the parts. used in workshops, and energy-intensive overhead cranes must be used.

The above-mentioned drawbacks are eliminated by a continuously adjustable hydraulic actuating device consisting of a hydraulic cylinder, the piston rod of which is equipped with return springs at its outer end with a suspension hook. The essence of the invention is that two axially oriented transfer channels one of which extends in the immediate vicinity of the piston on the side facing the sling hook and the other into the front recess in the piston on the side facing away from the slinging hook, a one-way relief valve is formed in the piston and permanently outside the working cylinder, the connecting duct into which the control valve cone protrudes has been modified. phase of movement, the movement can be interrupted at any time. The smoothness and speed of lowering is controlled directly by the worker who settles the object. This avoids injury to the worker due to third person ·

244 181

An exemplary embodiment of a continuously adjustable hydraulic lowering device is shown schematically in the attached drawing.

The continuously adjustable hydraulic lowering device comprises a hydraulic cylinder # which consists of a body 4 # whose lid is formed by a supporting eye 2 for suspension on a crane hook 3. The second cover 14 is provided with an axial bore # through which the piston rod 4 of the working piston 10 # passes, terminating at the outer, free end with a tie hook 5 for. causes burdens. On the side of the carrying eye 2, an auxiliary sealing piston 41 is mounted above the working piston 10 to prevent oil from entering the vent space 12. Two axially oriented transfer channels 7 # are formed in the piston rod 4 which connect the spaces above and below the piston 10. 7 ', a connecting channel 15 # is provided in the outer part of the piston rod 4 permanently outside the working cylinder 1 # into which the cone 16 of the manually operated control valve 6 extends. The working piston 10 is provided with a one-way transfer valve 9. 4 are provided with yokes 13 # on which return springs 8 are mounted.

The infinitely adjustable hydraulic lowering device is suspended by the lifting eye 2 on the crane hook 3. The load is suspended from the lifting hook 5.