Pneumatic turning device and locker using the same

Abstract

The invention discloses a pneumatic turning device, which comprises a long arm, a short arm and a cylinder. The cylinder comprises a cylinder liner, a piston, a piston rod, a sealing ring, a guide sleeve, a spring, lubricating oil and nitrogen, and the guide sleeve is airtightly inserted into the cylinder liner. The sleeve port, lubricating oil and nitrogen are built in the cylinder liner, the end of the cylinder liner opposite to the sleeve port is hinged to the first hinged end, the piston rod is airtightly connected to the guide sleeve, and the piston is fixed on the end of the piston rod and located in the cylinder liner. One end of the spring is fixedly connected to the inner end of the guide sleeve, and the other end of the spring extends into the cylinder liner along the axial direction of the piston rod. There is an annular groove on the peripheral wall of the piston, and the annular groove divides the piston to form a first ring away from the guide sleeve. Plug and the second ring plug close to the guide sleeve, the first ring plug is in clearance fit with the cylinder liner. The invention can make the piston slide smoothly in the piston sleeve after the piston rod is stressed, drive the rotating plate to open and close smoothly, and stop at any position in the middle, which is convenient for use.

Description

technical field [0001] The invention relates to a pneumatic overturning device and a locker using the device. Background technique [0002] The existing pneumatic overturning device used on the locker is a device for turning over the table top and switching the table top between closed and open states. The overturning device generally uses an ordinary cylinder, or a snap-in hinge or a gas spring or a damper, etc. Due to the unbalanced force on the cylinder piston, it can only achieve unstable opening or closing of the table, and when opening or closing the table During the process, it cannot be stopped at any position, which brings certain inconvenience. The damper is easy to break, and it cannot stop in the middle, and the service life is short, and the use effect is poor. [0003] In addition, when the table top is flipped to fast closing, because the air pressure in the cylinder increases exponentially, and the gravity provided by the table itself will be mostly transfer...

AI Technical Summary

Problems solved by technology

The overturning device generally uses an ordinary cylinder, or a snap-in hinge or a gas spring or a damper, etc. Due to the unbalanced force on the cylinder piston, it can only achieve unstable opening or closing of the table, and when opening or closing the table During the process, it cannot be stopped at any position, which will bring some inconvenience. The damper is easy to break, and it cannot stop in the middle, and the service life is short, and the use effect is poor.

[0003] In addition, when the table top is flipped to fast closing, because the air pressure in the cylinder increases exponentially, and the gravity provided by the table itself will be mostly transferred to the thrust of the cylinder liner, the closing force of the table is strong and fast, and it is easy to pinch hands and cause damage. There is a sound; when the table is opened, when it is close to the opening limit (90° from the state of the closed table), since most of the self-weight of the table is supported by the rotating shaft, and the air pressure that provides the reaction force in the cylinder decreases exponentially, so At this time, it will also happen that the opening force is too large and the speed is too fast, and the collision will easily cause damage to other components.

[0004] At present, in order to realize the flipping of the table, there is also a way to realize the stable opening and closing of the table through the motor, but the configured motor will bring a complicated structure, and it is easy to leak electricity, which is not safe

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