Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Winch telescopic hydraulic control system and engineering machinery

A hydraulic control system and hoisting technology, applied in mechanical equipment, cranes, fluid pressure actuating devices, etc., can solve problems such as loss of protection of the hoisting drive frame

Active Publication Date: 2019-01-04
CHANGSHA ZOOMLION FIRE FIGHTING VEHICLE
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the construction machinery where the frame body is located is powered off or is in a manual operation condition, the extended stroke of the winch drive frame body loses protection immediately.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Winch telescopic hydraulic control system and engineering machinery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0026] refer to figure 1 As shown, the winch telescopic hydraulic control system according to a preferred embodiment of the present invention can be used to control the telescopic movement of the boom of engineering machinery such as fire trucks. It can be understood that the hoisting telescopic control system is not limited to the telescopic control of the boom, and can also make related mechanical components perform other actions through the hydraulic cylinder 1 and the like. The hoist telescopic hydraulic control system of the present invention includes a main oil pump 2, a motor 3 for driving the telescopic boom of the hoist, a first working oil circuit L1 ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to the field of boom extension and retraction control systems and discloses a winch telescopic hydraulic control system and engineering machinery. A main oil pump (2) of the winch telescopic hydraulic control system can be controlled to selectively pump pressure oil to a motor (3) through a first working oil circuit (L1) or a second working oil circuit (L2) to drive a boom toextend or retract; a feedback control oil circuit (L3) is connected with the main oil pump; a proportional on-off valve (6) provided with a first liquid control chamber is arranged on the feedback control oil circuit (L3); a stroke control oil circuit (L4) is connected with the first liquid control chamber; a proportional stroke valve (7) is arranged on the stroke control oil circuit (L4); when the boom extends to a predetermined extension position, the opening of an oil opening of the proportional stroke valve (7) is increased along with the increase in the extension length of the boom, andthe first liquid control chamber is communicated with the first working oil circuit (L1) to control the gradual change of the proportional on-off valve (6) from an on state to an off state. Therefore,the safety during the boom extension is improved.

Description

technical field [0001] The invention relates to a boom telescopic control system, in particular to a winch telescopic hydraulic control system. On this basis, the present invention also relates to a construction machine with the winch telescopic hydraulic control system. Background technique [0002] In construction machinery similar to cranes and fire trucks, it is often used to hoist the frame on the construction machinery to do telescopic movement. But, when hoisting drive frame body stretches out, must control the extending stroke of frame body, in order to avoid frame body to stretch out overtravel and cause frame body to fall off. [0003] In the existing winch drive system, the extension stroke of the frame body is often detected by electrical components, and the extension stroke of the frame body is controlled according to the detection results of the electrical components. However, when the engineering machinery where the frame body is located is powered off or is...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B66C23/62B66C13/20B66C23/693F15B11/16
Inventor 欧涛
Owner CHANGSHA ZOOMLION FIRE FIGHTING VEHICLE
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products