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Recoil press

A press and pressure technology, applied in cranes, mechanical equipment, springs, etc., can solve the problems of increasing structural length, increasing weight, etc., and achieve the effects of short assembly size, light weight, and simple replacement

Inactive Publication Date: 2014-12-10
MONTANHYDRAULIK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This imposes an increased structural length compared to a hydraulic cylinder without an accumulator and thus increases the weight

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0030] figure 1 The prior art, the recoil press 1 , is shown in a greatly simplified view. The recoil press 1 has a cylinder cavity 2 filled with oil. The oil is present both in the bottom cavity 3 and in the annular cavity 4 , which is penetrated by the piston rod 5 .

[0031] The piston rod 5 is configured as a gas accumulator. The isolation piston 6 inside the piston rod 5 will be present in this piston rod 5, especially N 2 , separated from the oil in other areas of the recoil press 1.

[0032] The cylinder cavity 2 can be filled with oil via the connection 7 on the bottom cavity 3 . On the piston rod 5 there is a connection 8 via which the interior of the piston rod 5 can be filled with gas.

[0033] This arrangement has a relatively high weight due to the oil used and the isolation piston required to separate the oil from the gas. This solution has the following disadvantages: the volume of gas must be slightly larger than the volume of oil displaced in the recipro...

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PUM

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Abstract

Fall-back prevention press of a crane in the form of a gas pressure cylinder, with a piston rod engaging in a cylinder space of the gas pressure cylinder configured as piston-type accumulator, with gas in the bottom space of the cylinder being in exchange with the gas in the piston rod and the ring space in surrounding relationship to the piston rod. A seal arrangement in a rod guide of the cylinder seals the piston rod against the cylinder. The seal arrangement includes a lubricant groove which extends around the rod guide and via which the piston rod is lubricated on the outside. The lubricant is acted upon by gas pressure prevailing in the cylinder with interposition of a pressure transmitter.

Description

technical field [0001] The invention relates to a recoil press for a crane. The crane's jib lanyard reinforcement helps to increase loads. The lanyard reinforcement can be achieved by a rope or a tie rod and, for safe and reliable function, must be tracked and constantly tensioned when the jib moves or when the jib angle changes. An important element for this is the so-called recoil support. Background technique [0002] According to the prior art, a hydraulic cylinder is mounted on the recoil support, which applies a pressure from the jib to the recoil support in order to ensure a defined stress situation in the lanyard even when the jib is in a steep position. This hydraulic cylinder is called a recoil press and can be designed as a plunger cylinder or as a differential cylinder. In some cases, this hydraulic cylinder is not connected to the central hydraulic system. Oil exchange is achieved through an external pressure accumulator during cylinder movement. [0003] A...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B66C23/82B66C23/92F16F9/36
CPCB66C23/82F16F9/3278F16F9/365B66C23/92
Inventor C·施塔门
Owner MONTANHYDRAULIK
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