Safety pin interlocking device for crane, single cylinder safety pin type telescopic arm and crane

Abstract

The invention discloses a safety pin interlocking device for a crane, a single cylinder safety pin type telescopic arm and a crane. The safety pin interlocking device for the crane comprises a pin pull device dovetail groove and a mechanical lock which is fixedly connected with the dovetail groove; the motion path of the dovetail groove is perpendicular to an axis of a cylinder pin; meanwhile, the motion path of an upper cylinder pin is intersected with the motion path of the dovetail groove, and the motion path of a lower cylinder pin is intersected with the motion path of the mechanical lock; when the arm pin moves to the unlocking position, an arm pin pulling oil cylinder drives the dovetail groove to lock the upper cylinder pin, and meanwhile, the dovetail groove drives the mechanicallock to lock the lower cylinder pin; and when the cylinder pin moves to the unlocking position, the upper cylinder pin locks the dovetail groove by a cylinder pin body, and meanwhile, the lower cylinder pin locks the mechanical lock by the cylinder pin body, thereby the arm pin is directly and indirectly locked. The single cylinder safety pin type telescopic arm and telescopic arm type crane provided by the invention comprise the safety pin interlocking device.

Description

Technical field [0001] The invention involves the field of cranes, especially an insertion interoperability for single -cylinder plug -in telescopic crane cranes.In addition, the present invention also involves a single -cylinder inserted telescopic arm that includes the above -mentioned interpolation mutual lock devices and a crane with a single -cylinder plug -in telescopic arm. Background technique [0002] At present, large tonnage and large tonnage vehicle cranes at home and abroad are widely adopted by single -cylinder plug -in telescopic mechanisms. This telescopic mechanism is characterized by only one telescopic oil cylinder. Its core device is an insertion agency installed at the position of the ejaculation oil cylinder head.Mutual locking device is a key component to ensure safe and reliable operation of the insertion agency. [0003] Inserting intermodal lock devices include mechanical locks, unplugged devices, and cylinders on both sides of the telescopic oil cylinde...

AI Technical Summary

Problems solved by technology

However, in the actual working process, due to various complicated reasons, the driving force of the cylinder pin 211 and the cylinder pin 221 cannot be completely equal, so the magnitude of the force acting on the connecting rod 7 by the cylinder pin is also different, and the connecting rod is therefore affected. A certain level of torque will reduce the service life of cylinder pins and connecting rods in the long run, and it is not conducive to the stability of telescopic boom cranes

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