LIFTING SYSTEM AND LIFTING METHOD FOR JIB OF AN OPERATING MACHINE, AND AN OPERATING MACHINE THEREOF
First Claim
1. A lifting system for a jib of an operating machine, comprising:
- an energy storage device used for storing the gravitational potential energy during the descending of the jib and lifting the jib by use of the stored energy during the ascending of the jib, the energy storage device includes an energy storage cylinder and an accumulator, the energy storage cylinder comprising an upper chamber and a lower chamber which are separated by an energy storage piston, wherein the energy storage piston comprises an energy storage piston rod operably connected to the jib, wherein an upper volume of the accumulator is filled with a pressurized gas, and a lower volume of the accumulator is filled with a pressurized hydraulic oil and is in fluid communication with the lower chamber of the energy storage cylinder;
a control cylinder for controlling the jib lifting, the control cylinder comprising an upper chamber and a lower chamber which are separated by a control piston, wherein the energy storage piston comprises a control piston rod operably connected to the jib; and
a hydraulic pump for selectively supplying the pressurized hydraulic oil to the upper chamber of the control cylinder or the lower chamber of the control cylinder through a distributor;
wherein when the hydraulic pump supplies the pressurized hydraulic oil to the upper chamber of the control cylinder through the distributor, the control piston rod drives the jib to descend, and the weight of the jib pushes against the energy storage piston rod of the energy storage cylinder so that the hydraulic oil in the lower chamber of the energy storage cylinder is pushed into the lower volume of the accumulator, hence the pressurized gas in the upper volume of the accumulator is compressed so as to recover the gravitational potential energy of the jib; and
wherein when the hydraulic pump supplies the pressurized hydraulic oil to the lower chamber of the control cylinder through the distributor, the control piston rod drives the jib to ascend so as to lift the energy storage piston rod, thereby the compressed gas in the upper volume of the accumulator pushes the hydraulic oil in the lower volume of the accumulator into the lower chamber of the energy storage cylinder, and thus the recovered energy is released to push the energy storage piston rod for elevating the jib.
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Accused Products
Abstract
A lifting system for a jib of an operating machine that includes an energy storage device having an energy storage cylinder and an accumulator, the energy storage cylinder having an upper chamber, a lower chamber, and an energy storage piston rod connected to the jib. The upper part of the accumulator is filled with gas, and the lower part of the accumulator is filled with hydraulic oil and communicates with the lower chamber of the energy storage cylinder. The lifting system also includes a hydraulic pump and a control cylinder for controlling the lifting of the jib, which comprises an upper chamber, a lower chamber, and a control piston rod connected to the jib.
9 Citations
20 Claims
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1. A lifting system for a jib of an operating machine, comprising:
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an energy storage device used for storing the gravitational potential energy during the descending of the jib and lifting the jib by use of the stored energy during the ascending of the jib, the energy storage device includes an energy storage cylinder and an accumulator, the energy storage cylinder comprising an upper chamber and a lower chamber which are separated by an energy storage piston, wherein the energy storage piston comprises an energy storage piston rod operably connected to the jib, wherein an upper volume of the accumulator is filled with a pressurized gas, and a lower volume of the accumulator is filled with a pressurized hydraulic oil and is in fluid communication with the lower chamber of the energy storage cylinder; a control cylinder for controlling the jib lifting, the control cylinder comprising an upper chamber and a lower chamber which are separated by a control piston, wherein the energy storage piston comprises a control piston rod operably connected to the jib; and a hydraulic pump for selectively supplying the pressurized hydraulic oil to the upper chamber of the control cylinder or the lower chamber of the control cylinder through a distributor;
wherein when the hydraulic pump supplies the pressurized hydraulic oil to the upper chamber of the control cylinder through the distributor, the control piston rod drives the jib to descend, and the weight of the jib pushes against the energy storage piston rod of the energy storage cylinder so that the hydraulic oil in the lower chamber of the energy storage cylinder is pushed into the lower volume of the accumulator, hence the pressurized gas in the upper volume of the accumulator is compressed so as to recover the gravitational potential energy of the jib; and
wherein when the hydraulic pump supplies the pressurized hydraulic oil to the lower chamber of the control cylinder through the distributor, the control piston rod drives the jib to ascend so as to lift the energy storage piston rod, thereby the compressed gas in the upper volume of the accumulator pushes the hydraulic oil in the lower volume of the accumulator into the lower chamber of the energy storage cylinder, and thus the recovered energy is released to push the energy storage piston rod for elevating the jib. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification