Single-cylinder latch device, cylinder head assembly and crane

Abstract

The invention discloses a single-cylinder latch device, a cylinder head assembly and a crane, and relates to the field of engineering machines. The single-cylinder latch device, the cylinder head assembly and the crane are used for optimizing the structure of an existing cylinder pin driving mechanism and the structure of an existing arm pin driving mechanism. The single-cylinder latch device comprises a driving oil cylinder, cylinder pin guide rails used for driving a cylinder pin to move, arm pin guide rails used for driving a dovetail groove part to move and a restoration element. A first piston rod of the driving oil cylinder is connected with the cylinder pin guide rails in a driving manner, and a second piston rod of the driving oil cylinder is connected with the arm pin guide rails in a driving manner; and the first piston rod and the second piston rod are both connected with the restoration element. The restoration element is used for driving the driving oil cylinder to be restored when the driving oil cylinder is in the pressure reducing state. The whole single-cylinder latch device can be arranged outside a cylinder head body, and installing and maintaining of the single-cylinder latch device are simplified.

Description

technical field [0001] The invention relates to the field of engineering machinery, in particular to a single-cylinder latch device, a cylinder head assembly and a crane. Background technique [0002] Single-cylinder pin system: it is a device built into the boom of the crane to assist the telescopic cylinder to realize the telescopic function of the boom of the crane. The single-cylinder latch system is mainly composed of an outrigger and an oil cylinder, among which the arm pin, cylinder pin, dovetail groove, detection switch and other auxiliary facilities are the main functional components for the boom to expand and contract. [0003] The driving mechanism and method of the existing single-cylinder latch type cylinder pin and arm pin are that a small oil cylinder built in the cylinder head drives the cylinder pin to expand and contract, and an oil cylinder is designed to drive the arm pin to move inside the cylinder head or outside the cylinder head. However, the oil cyl...

AI Technical Summary

Problems solved by technology

[0019] 1) high cost

This mechanism requires a forged or cast cylinder head body, and the subsequent cylinder head body requires high-precision machining, resulting in a large investment in equipment and labor, and the cost of the drive mechanism is high

[0020] 2) High craftsmanship

[0021] 3) High synchronization requirements

[0023] 1) high cost

Not only the cylinder head body is required, but also another set of device is required to drive the arm pin to move, which is equivalent to increasing the cost input of the driving mechanism

[0024] 2) heavy weight

The cylinder size is large, and the ramp is bulky and heavy

[0025] 3) The connection is complicated

The ramp mechanism is complex and needs to be connected with the drive cylinder, spring, and telescopic cylinder

[0026] 4) Welding damages the cylinder

Welding multiple structural parts on the cylinder makes the cylinder easy to deform

The force on the support is easy to cause damage to the welded part of the cylinder

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