Piston cylinder of a two-stage stroke single-push rod electrohydraulic pusher

Abstract

Provided is a two-stage stroke singe-push-rod electric hydraulic thruster. A piston cylinder barrel is arranged between a shell and a motor base. A solenoid valve is in series connection in an oil return channel. A piston is arranged in the piston cylinder barrel, the piston is fixedly connected with a push rod, and one end of the push rod stretches out of the shell. The two-stage stroke singe-push-rod electric hydraulic thruster is characterized in that a check valve is in series connection between the motor base and the piston cylinder barrel, a center column of a check valve shell is sleeved with a valve block, a spring is clamped at the upper end of the check valve shell, and the valve block is correspondingly arranged above an oil inlet hole of the check valve. The check valve divides the total stroke of the electric hydraulic driver into a work braking stroke and a parking braking stroke under the cooperation of the solenoid valve and other structures of the electric hydraulic thruster, so that a brake has the effects of fast applying proper work braking force and gradually generating strong braking force during parking, and meanwhile an energy saving effect is achieved.

Description

Technical field [0001] The invention relates to a double-stage stroke single-push rod electrohydraulic pusher, especially a piston cylinder that plays an important role in the double-stage stroke function. Background technique [0002] At present, the structure of the known single push rod electro-hydraulic pusher is that the shell is fixedly connected with the motor base, the piston cylinder is fixedly arranged between the shell and the motor base, the piston in the piston cylinder is fixedly connected with the push rod, and one end of the push rod extends out of the shell. . When the motor in the motor seat drives the impeller to rotate to pump oil into the piston cylinder, the hydraulic oil pushes the piston upward; when the motor stops rotating, the hydraulic oil loses pressure and returns through the gap of the impeller, and the piston moves downward. The movement of the piston drives the push rod to act on the brake frame to release the brake or generate braking force...

AI Technical Summary

Problems solved by technology

[0003] However, since the cranes used in the open air may encounter danger due to strong winds, it is necessary to quickly apply an appropriate working braking force during the operation, and also need to generate a gradually stronger parking braking force when parking. Currently, the existing electro-hydraulic pushers do not have this function

There is a technical solution to achieve these two different braking forces by using the accessories and the electro-hydraulic pusher together, but the use of accessories will cause complex structure of the equipment and difficulty in debugging, and there are often failures of improper cooperation between the electro-hydraulic pusher and the accessories, making the accessories useless

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