Booster for transmission gear boxes
AssigneeKia Heavy Industries Corporation
InventorsYoung Jong Jin, Seung Hwan Bae
Life of this patent
Estimating the term…
Abstract
A booster for a transmission gear box has an actuating rod cooperating with a gearshift lever and a hollow piston rod movably penetrating the pneumatic cylinder and cooperating with the actuating rod. A connector is mounted to the piston rod and introduces and discharges pressurized air into and from the piston rod. A striker is coupled to the actuating and piston rods through a pin and is coupled to a connecting lever of the gear box to allow the connecting lever to be operated in conjunction with the actuating and piston rods. The booster prevents a relative rotating motion between the actuating and piston rods, simplifies the gearshift part of the gear box, smoothly engages and disengages gears to the gear box with a small force and provides an easily-machinable hollow piston rod.
Claims11
A booster for transmission gear boxes, comprising:
- a pneumatic cylinder;
- a cylindrical actuating rod cooperating with a gearshift lever to thereby transmit a levering motion of said gearshift lever to the booster, said actuating rod having a transverse through hole;
- a hollow piston rod movably penetrating said pneumatic cylinder in an axial direction and partially receiving said actuating rod on one end thereof thus cooperating with said actuating rod in accordance with a levering motion of the gearshift lever, said piston rod having a piston on its outer surface at a position inside the cylinder to thereby form two pressure chambers inside the cylinder;
- a connector mounted to the other end of said piston rod, said connector including an air inlet port and an air outlet port for introducing and discharging pressurized air into and from the piston rod respectively;
- a striker coupled to both the actuating rod and piston rod through a first coupling pin thereby moving along with said actuating and piston rods in the same direction, said striker having coupling means for coupling the striker to a connecting lever of a transmission gear box to enable the connecting lever to be operated in conjunction with the striker, said first coupling pin passing said transverse through hole of the actuating rod and being fixed to said hollow piston rod on both ends thereof;
- a booster housing assembled with said pneumatic cylinder and covering the piston rod and the striker;
- a valve lift shaft coupled to said actuating rod through a second coupling pin inside said piston rod thus being operated in conjunction with said actuating rod;
- two movable valves provided on both ends of said valve lift shaft, said movable valves selectively moving along with said valve lift shaft in the same direction to control the flow direction of said pressurized air from the connector to the chambers of the cylinder;
- two valve holding springs symmetrically provided on both ends of said valve lift shaft and biasing said movable valves respectively;
- two valve seats fitted over said valve lift shaft and brought into slidable contact with the internal surface of said piston rod, said valve seats having a plurality of communication passages to introduce or discharge the pressurized air into or from the chambers of the cylinder;
- two washers fitted over the actuating rod at positions inside the piston rod;
- and
- a return spring fitted over said actuating rod and held by said washers and elastically returning the actuating rod to a neutral position when the actuating rod is released from external force.
Dependencies are inferred from the claim text.