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Single-cylinder plug pin type telescopic arm, crane and telescoping method of single-cylinder plug pin type telescopic arm

A single-cylinder plug-in, telescopic boom technology, applied in cranes and other directions, can solve the problems of increased friction of the telescopic cylinder, increased weight of the telescopic cylinder, and increased cost of the telescopic cylinder, reducing the cylinder diameter and rod diameter, shortening the length of the cylinder, The effect of reducing the weight of the vehicle

Active Publication Date: 2015-06-17
XUZHOU HEAVY MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This leads to a high cost of the oil cylinder, and the weight of the crane is too large, which indirectly leads to an increase in the weight of the chassis, which limits the lifting performance and approaches the minimum requirements of the national standard, which has a great impact on the product's competitive advantage.
[0008] 2. High cost
The stroke of the telescopic cylinder needs to meet the extension stroke of each telescopic arm, resulting in an excessively long stroke of the telescopic cylinder
It is difficult to process the cylinder rod and cylinder barrel of the long oil cylinder, which requires professional special processing equipment and processing conditions, resulting in a significant increase in the cost of the telescopic oil cylinder
[0009] 3. Heavy weight
Since the telescopic cylinder is too long and needs to bear a large axial compression load, in order to prevent the longitudinal bending of the telescopic cylinder and meet the stability requirements, a thicker cylinder rod diameter, bore diameter and material thickness are required, and a longer guide is required The distance increases the weight of the telescopic cylinder
At the same time, in order to meet the expansion and contraction of the large-stroke oil cylinder, it is necessary to configure a larger-sized oil tank, which will also increase the weight of the crane
[0010] Due to national traffic regulations, there are clear regulations on the weight of vehicles on the road, so the increase in weight will lead to more complex crane design, and the vehicle toll will also increase accordingly
[0011] 4. Poor stability
For long-stroke telescopic cylinders, after the cylinder rod is stretched out, due to its own weight, the connection between the cylinder rod and the cylinder barrel will be deflected downwards, resulting in an increase in the friction of the telescopic cylinder.
At the same time, affected by the elastic modulus of the hydraulic oil, the second half of the oil cylinder will stretch out, and there will be creeping and crawling, causing shaking

Method used

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  • Single-cylinder plug pin type telescopic arm, crane and telescoping method of single-cylinder plug pin type telescopic arm

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Embodiment Construction

[0047] The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0048] It should be noted that: any technical feature and any technical solution in this embodiment are one or more of a variety of optional technical features or optional technical solutions. All the alternative technical features and alternative technical solutions of the present invention are cited, and it is not convenient for the implementation of each technical feature to emphasize that it is one of the optional multiple implementation modes, so those skilled in the art should know: Any technical features and any technical solutions in the embodiments do not limit the protection scope of the present invention, and the protection scope of the present invention should include any alternative technical solutions that those skilled in the art can think of without creative efforts.

[0049] For the convenience of desc...

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Abstract

The invention relates to a single-cylinder plug pin type telescopic arm, a crane and a telescoping method of the single-cylinder plug pin type telescopic arm. The single-cylinder plug pin type telescopic arm comprises a basic arm and at least one section of telescopic arm which is sleeved in the basic arm, wherein coaxial central holes are formed in the tails of the telescopic arms; a telescopic oil cylinder is arranged in the central holes and comprises a cylinder rod and a cylinder barrel; at least two cylinder heads are fixedly sleeved outside the cylinder barrel in the longitudinal direction; at least three arm pin holes are respectively formed in the basic arm and the telescopic arm in the longitudinal direction. The single-cylinder plug pin type telescopic arm provided by the invention adopts the telescopic oil cylinder and the at least two cylinder heads; each cylinder head can be used for locking and unlocking the telescopic oil cylinder and any one telescopic arm; in a relay manner, the telescopic arms stretch or shrink; telescoping of the single-cylinder plug pin type telescopic arm is realized; the length of the oil cylinder is reduced; the cylinder diameter and the rod diameter of the oil cylinder are reduced; the cost of the oil cylinder is lowered; the loading weight is reduced; the hoisting capability is improved; the design capability of the crane is improved.

Description

technical field [0001] The invention relates to the field of engineering machinery, in particular to a single-cylinder bolt-type telescopic arm, a crane including the single-cylinder bolt-type telescopic arm and a telescoping method for the single-cylinder bolt-type telescopic arm. Background technique [0002] The single-cylinder bolt system is a device built into the boom of the crane to realize the telescopic function of the boom. It is mainly composed of a telescopic boom and a telescopic oil cylinder, including the boom pin, the boom pin hole, the cylinder head, the cylinder pin, Cylinder rods, cylinder barrels, dovetail grooves, detection switches and other auxiliary facilities are the main functional components for the telescopic boom. The cylinder head is located at a certain position of the cylinder barrel or piston rod of the telescopic cylinder, and is used to control the device for fixing and separating the telescopic cylinder and the telescopic arm, mainly inclu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B66C23/687B66C23/693
Inventor 东权张鑫邓永建赵玉春刘晓飞
Owner XUZHOU HEAVY MASCH CO LTD
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