Hyperextension preventing device for single-cylinder bolt type crane oil cylinder
A single-cylinder plug-in, crane technology, applied in cranes, transportation and packaging, etc., can solve the problems of the telescopic oil cylinder leaving the slideway, falling off the way, etc., to reduce the risk, improve the safety, and optimize the structure with little change.
Active Publication Date: 2015-04-22
XUZHOU HEAVY MASCH CO LTD
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Problems solved by technology
[0014] ①The existing technology judges whether the telescopic cylinder is overextended by whether the signal of the arm position detection switch disappears, and there is a risk of failure
Therefore, in the prior art, there is a risk that the telescopic oil cylinder is detached from the slideway, that is, the phenomenon of falling off the track is often said in the field.
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[0046]The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.
[0047] In the prior art, image 3 It is a schematic diagram of the last arm (actually the tail of the last arm) and the telescopic cylinder when detecting the position of the arm. It can be seen from the figure that the detection seat 2 is fixed on the last arm 5, and the proximity switch 4 (a sensor for detection, or a detection sensor) switch) is fixed on the telescopic oil cylinder 6, with the movement of the telescopic oil cylinder 6, the proximity switch 4 and the detection seat 2 realize relative movement, and then realize the detection of the arm position. When the proximity switch 4 is at position A, the arm position can be detected at this time. According to the standard operation, the ...
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The invention belongs to the field of hyperextension prevention of a crane oil cylinder, and particularly relates to a hyperextension preventing device for the single-cylinder bolt type crane oil cylinder. The hyperextension preventing device comprises a telescopic oil cylinder, and a distal arm of a crane boom. The hyperextension preventing device is characterized by also comprising a detection seat which is positioned at the tail of the distal arm and / or extends out from the distal arm, an arm position detection sliding block fixedly arranged on the telescopic oil cylinder, and a proximity switch, and the detection seat is provided with a hyperextension preventing detection component; when detecting the hyperextension preventing detection component, the proximity switch sends switching value signals to a controller, and the controller makes logical judgment and limits the telescopic cylinder to continue to make forward extension action. The hyperextension preventing device provided by the invention mainly has the following advantages of preventing the dangers caused by manual misoperation, needing no long-term participation of the cylinder to improve the detection accuracy, performing electrical control limiting once before structural limiting, and dually ensuring the telescopic cylinder to prevent hyperextension caused by misoperation and greatly improve the safety of the complete device.
Description
technical field [0001] The invention belongs to the field of anti-overextension of oil cylinders of cranes, and in particular relates to an anti-overextension device of single-cylinder bolt type crane oil cylinders. Background technique [0002] Single-cylinder plug-type telescopic system: It is a device built in the outrigger of the crane and realizes the telescopic function of the crane's outrigger through the telescopic oil cylinder. It is mainly composed of outrigger and telescopic oil cylinder, among which the arm pin, cylinder pin, dovetail groove, detection switch and other auxiliary facilities are the main functional parts of the outrigger to realize telescopic, see figure 1 . [0003] The specific structure includes: [0004] Cylinder head body: located on the cylinder barrel or piston rod of the telescopic cylinder, it is used to control the connection and separation between the telescopic cylinder and the outrigger, and between the outrigger and the outrigger....
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IPC IPC(8): B66C23/62B66C23/693
CPCB66C23/62B66C23/701B66C2700/03
Inventor 东权邓永建王晓辉周化龙
Owner XUZHOU HEAVY MASCH CO LTD