Device for hydraulic support back timber balance keeps

The utility model discloses a device for hydraulic support back timber balance keeps, the cylinder is inside to have and runs through logical chamber, both ends are equipped with cylinder cap and uide bushing respectively, be equipped with on the cylinder lateral wall with the first plinth and the second plinth that run through logical chamber intercommunication, the piston lies in between first plinth of cylinder and the second plinth, the opening that the one end follow uide bushing of piston was kept away from to the piston rod stretches out and runs through logical chamber, between piston and the cylinder, between piston and the piston rod, between uide bushing and the cylinder, all is equipped with the sealing member between uide bushing and the piston rod the utility model provides a device for hydraulic support back timber balance keeps, overall structure is compact, reasonable in design, stable in structure is reliable in the relapse use, and mechanical precision is high, adopts the sealing member to seal up between each parts, improves greatly and seals up the effect, and working medium does not take place to leak, can prevent that outside dust impurity from leading to the fact the damage to each parts in getting into the cylinder yet