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A hydraulic system for a forklift lifting cylinder

A technology for a hydraulic system and an oil cylinder is applied in the field of the hydraulic system of a forklift hoisting cylinder, which can solve the problems of inability to work, the damage of the first two-position two-way solenoid valve, the second two-position two-way solenoid 5, etc., so as to save energy and realize energy recovery. , the effect of ensuring safety

Active Publication Date: 2022-05-03
鸿程电子工业(南通)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in a real working environment, there will be situations where the first two-position two-way solenoid valve 4 and the second two-position two-way solenoid valve 5 are damaged and unable to work

Method used

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  • A hydraulic system for a forklift lifting cylinder
  • A hydraulic system for a forklift lifting cylinder
  • A hydraulic system for a forklift lifting cylinder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The oil outlets of the third electromagnetic valve 6 and the fourth electromagnetic valve 7 and the oil inlet of the fifth electromagnetic valve 9, the oil outlet of the fifth electromagnetic valve 9 are connected to the oil tank 1, and the first oil circuit 101 Cartridge valve 2 14 and seventh solenoid valve 15 are sequentially connected with the rod cavity of lift cylinder 8, and the three-position four-way solenoid valve 2 is connected between the first oil circuit 101 and the rodless cavity of lift cylinder 8. 13. A three-position four-way solenoid valve 10 is connected between the second oil circuit 102 and the rod cavity of the lift cylinder 8, and a three-position four-way solenoid valve 10 is connected between the second oil circuit 102 and the rodless cavity 1 of the lift cylinder 8 in sequence. Cartridge valve one 11, sixth solenoid valve 12, oil port one A1 of the three-position four-way solenoid valve two 13 is connected to the first oil circuit 101, oil port...

Embodiment 2

[0033] On the basis of the first improved embodiment above, this embodiment is improved as follows, the oil port three C1 and the oil port three C2 are connected to the oil port one A3 of the flow regulating valve 16, the oil port three C1 and the oil port three C2 Oil port three C2 is also connected to one port of the three-position two-way solenoid valve 17, the other port of the three-position two-way solenoid valve 17 is connected to the accumulator two 26, and the oil port two B3 of the flow regulating valve 16 is connected to the oil tank 1. Oil port three C3 is connected to the first relief valve 18 and oil port one A4 of the two-position four-way solenoid valve 19, the first relief valve 18 is connected to the oil tank 1, and the oil of the two-position four-way solenoid valve 19 Port two B4 is connected to the first chamber 20.1 of the supercharger 20, the oil port three C4 of the two-position two-way solenoid valve 19 is connected to the fuel tank 1, and the oil port ...

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Abstract

The invention discloses a hydraulic system for a lift cylinder of a forklift. The arrangement of the application can ensure the normal operation of the lift cylinder when one of the first solenoid valve 4 or the second solenoid valve 5 is damaged. Because when the state of the lifting cylinder is switched, whether it is in the normal state or when the first solenoid valve 4 and the second solenoid valve 5 are damaged, the first oil circuit 101 and the second oil circuit 102 are parts that are subjected to a large oil pressure shock. Therefore, the arrangement of the present application can also ensure the stability of the first oil passage 101 and the second oil passage 102, thereby further ensuring the safety of the hydraulic system. The above-mentioned arrangement of the present application can increase the pressure of the oil stored in the accumulator, thereby achieving the effect of energy recovery and energy saving compared with common accumulator energy storage.

Description

technical field [0001] The invention belongs to the field of forklifts, and in particular relates to a hydraulic system for a lifting cylinder of a forklift. Background technique [0002] Forklift is an industrial handling vehicle, which refers to various wheeled handling vehicles for loading and unloading, stacking and short-distance transportation of palletized goods. Such as figure 1 Shown is a forklift truck 100 in the prior art, wherein the lifting cylinder 8 is used for lifting and lowering the object to be lifted, and its working safety and stability are crucial for the forklift truck. [0003] Such as figure 2 , 3, the oil circuit that drives the lift cylinder 8 in the prior art includes a fuel tank 1, a filter 2, a hydraulic pump 3 and four two-position two-way solenoid valves, and the four two-position two-way solenoid valves are the first A two-position two-way solenoid valve 4, a second two-position two-way solenoid valve 5, a third two-position two-way sole...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B66F9/22F15B1/02F15B11/08F15B13/04F15B20/00F15B21/14
CPCB66F9/22F15B1/02F15B11/08F15B13/04F15B20/008F15B21/14
Inventor 程伟
Owner 鸿程电子工业(南通)有限公司
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