hydraulic cylinder

Abstract

The invention relates to the field of hydraulic cylinders and discloses a hydraulic cylinder. The inside of the cylinder body (1) of the hydraulic cylinder is divided into a rodless chamber (4) and a rod chamber (5) by the piston (3) connected with the piston rod (2), and the piston rod (2) is fixedly connected with a The moving positioning piece (6), a locking mechanism (7) is provided between the positioning piece (6) and the cylinder (1), wherein, oil is fed into the rodless chamber (4) so ​​that the piston rod (2) stretches out to drive the positioning After the piece (6) moves axially to the set position, the locking piece (8) of the locking mechanism (7) locks the positioning piece (6) and the cylinder (1); oil enters the rod cavity (5) to make the piston When the rod (2) is retracted, the locking piece (8) unlocks the positioning piece (6) and the cylinder (1). The hydraulic cylinder can maintain the position of the piston rod without continuing to maintain pressure on the rodless chamber after the piston rod extends to a predetermined position, thereby reducing energy consumption and improving the service life of the hydraulic system.

Description

technical field [0001] The present invention relates to the technical field of hydraulic cylinders, in particular to a hydraulic cylinder. Background technique [0002] It is known that an existing hydraulic cylinder includes a cylinder body, a piston and a piston rod, wherein the piston divides the inner space of the cylinder body into a rod chamber and a rodless chamber. During the use of the hydraulic cylinder, it usually needs to stay for a period of time after a single action is completed. For example, after the rodless cavity enters the oil, the piston moves and drives the piston rod to fully extend, in order to ensure continuous strong support for the object on the piston rod , Usually, the rodless chamber will be continuously pressurized to apply continuous hydraulic pressure to the piston, so that the piston rod will stay still, so that the piston rod will not retract into the cylinder under force. [0003] However, there are also certain defects in this way, that ...

AI Technical Summary

Problems solved by technology

[0003] However, there are also certain defects in this way, that is, due to the continuous pressure maintaining of the rodless cavity, the energy consumption is increased to a certain extent. This long-term continuous pressure holding will cause certain damage to the entire hydraulic system.

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