KR950033123A - Pre-lock cylinder with pressurized pump means - Google Patents

Abstract

[purpose]

Fine-tune the piston position of the cylinder. Correct the positional deviation when an external force is applied to the piston.

[Configuration]

A communication path is formed between the fluid chambers of the cylinders, and an on-off valve is provided in this communication path. A pumping device and a press-in passage are installed in at least one fluid chamber. Install a fluid path between the uncompressed fluid chamber and the preload fluid tank.

Description

Pre-lock cylinder with pressurized pump means

As this is a public information case, the full text was not included.

1 is a schematic configuration diagram of a pre-lock cylinder according to an embodiment of the present invention, FIG. 2 is a schematic configuration diagram of a pre-lock cylinder according to an embodiment of the present invention, and FIG. 3 is a free configuration according to an embodiment of the present invention. 4 is a schematic configuration diagram of a pre-look cylinder according to an embodiment of the present invention, and FIG. 5 is a schematic configuration diagram of a pre-look cylinder according to an embodiment of the present invention.

Claims (7)

A pre-lock cylinder having a fluid passage formed by opening / closing a valve between a front fluid chamber and a rear fluid chamber of a cylinder partitioned by a piston, and a pump for injecting fluid into at least one of the front fluid chamber and the rear fluid chamber of the cylinder. A pre-lock cylinder with a pressure pump, comprising: an apparatus and a fluid passage for communicating a non-pressurized side fluid chamber with a preload fluid tank outside the cylinder. The pre-lock cylinder according to claim 1, wherein a passage in which a check valve is mounted is formed between the preload tank and the pump chamber of the pump apparatus. The cylinder of the piston member according to claim 1 or 2, wherein at the end of one of the fluid chambers of the cylinder, a preload fluid tank is provided through a partition wall and both rod pistons are made to pass through the liquid in the preload fluid tank. And a fluid passage for communicating the other fluid chamber with the preload fluid tank. 3. The check valve according to claim 1 or 2, which is formed in a communication passage between the front fluid chamber and the rear fluid chamber, and is opened in a communication valve between the check valve and the non-pressurized fluid chamber, and a check valve that opens only to one of the pressurized fluid chambers. And a pre-loading tank connected to the pressurized fluid chamber via a check valve from the pump chamber of the pump unit and the pump chamber of the pump apparatus, and a communication passage between the check valve and the uncompressed fluid chamber via a branch passage. The pump device has a piston member that moves between the check valve and the pump chamber, and the piston member opens the check valve at a position in contact with the check valve and at the same time performs a reciprocating motion of pumping from above the check valve. Rock cylinder. 5. The fluid passage of claim 4, wherein the fluid is pressurized into the first fluid passage (18a) and the front fluid chamber (3) for pressurizing the fluid into the rear fluid chamber (4) between the front fluid chamber side communication passage and the rear fluid chamber side passage of the cylinder. A flow path control valve having a second flow path 18b and three flow paths of the third flow path 18c communicating the front fluid chamber 3 and the rear fluid chamber 4 is further provided. Free lock cylinder. The pre-lock cylinder, which forms a fluid communication passage for opening and closing the valve between the front fluid chamber and the rear fluid chamber of the cylinder partitioned by the piston, and the communication path between the front fluid chamber and the rear fluid chamber, opens only to each fluid chamber side. The pressure fluid tank connected to the communication passage between the pair of left and right check valves and the pair of check valves through the branch passage, the preload fluid tank connected to the communication passage between the check valves through the branch passage, and each check valve. And a pair of left and right pump apparatuses installed in correspondence with each other, and a pair of left and right fluid inlet passages communicating from a pump chamber of each pump apparatus to a corresponding fluid chamber through a check valve, wherein each pump apparatus is displaced between each check valve and the pump chamber. Freely installed, open the check valve in the pressure contact position with the check valve, the pump reciprocating in the position away from the check valve A pre-lock cylinder, comprising a piston member. 7. The pump device according to claim 6, wherein the pump apparatus holds the pair of piston members in the intermediate body in the check valve position, and shifts the other piston member to the check valve open position when the one piston member is displaced to the pumping operation position. A pre-lock cylinder further comprising an interlocking operation member. ※ Note: The disclosure is based on the initial application.