Crane and a hydraulic control system of single-cylinder telescopic mechanism thereof

A technology of a hydraulic control system and a telescopic mechanism, which is applied in the field of hydraulic control and can solve the problems of no public hydraulic control system, etc.

Inactive Publication Date: 2012-07-25
SANY AUTOMOBILE HOISTING MACHINERY
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Problems solved by technology

This patent only discloses the mechanical structure of this five-arm single-cy

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  • Crane and a hydraulic control system of single-cylinder telescopic mechanism thereof
  • Crane and a hydraulic control system of single-cylinder telescopic mechanism thereof

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Embodiment Construction

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0028] Such as figure 1 As shown, the present invention provides a hydraulic control system of a single-cylinder telescopic mechanism, including a cylinder pin cylinder 10, a telescopic cylinder 11, a first oil circuit and a second oil circuit, and is characterized in that it also includes a main reversing valve 1, The main reversing valve 1 has an oil inlet connected to a high-pressure oil source, an oil return port connected to an oil tank, a first oil port ...

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Abstract

The invention relates to a crane and a hydraulic control system of single-cylinder telescopic mechanism thereof, wherein the hydraulic control system of the single-cylinder telescopic mechanism comprises a cylinder pin cylinder, a telescopic cylinder, a first oil circuit and a second oil circuit and also comprises a main reversing valve, wherein the main reversing valve comprises an oil inlet in connection with high-pressure oil source, an oil return port in connection with an oil tank, a first oil port and a second oil port, wherein the first oil port and the second oil port of the main reversing valve are respectively connected to a rod cavity and a non-rod cavity of the telescopic cylinder through the first oil circuit and the second oil circuit; and a first reversing valve, wherein the first reversing valve comprises an oil inlet, an oil outlet and an oil return port; the oil inlet of the first reversing valve is connected with the first oil port of the main reversing valve through the first oil circuit; the oil outlet of the first reversing valve is connected with the cylinder pin cylinder; and the oil return port of the first reversing valve is connected with the oil tank. According to the invention, the hydraulic control system of the single-cylinder telescopic mechanism can use a telescopic cylinder to control a stretching arm and a retractor arm of the five-arm crane.

Description

technical field [0001] The invention mainly relates to the field of hydraulic control, in particular to a hydraulic control system of a crane and a single-cylinder expansion mechanism thereof. Background technique [0002] At present, the telescopic control system used by the crane includes a single-cylinder bolt type telescopic mechanism hydraulic control system, a two-stage telescopic oil cylinder type telescopic mechanism hydraulic control system, a double-cylinder rope row type telescopic mechanism hydraulic control system and a simple single-cylinder telescopic mechanism hydraulic system. The hydraulic control system of the single-cylinder bolt type telescopic mechanism extends or retracts each section of the boom sequentially by controlling the telescopic cylinder, so as to realize the telescopic movement of the boom. It can be applied to cranes with six booms and above. However, the hydraulic pressure The system structure is complicated and the cost is high. The hydr...

Claims

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Application Information

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IPC IPC(8): B66C23/693
Inventor 双志周丽云张勇
Owner SANY AUTOMOBILE HOISTING MACHINERY
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