FIELD: transport engineering.
SUBSTANCE: gearshift mechanism pusher of wheeled excavator conventional gearbox is made in form of three-position hydraulic cylinder with piston 2. Tail part 3 of piston 2 engages with gearshift fork. Stepped cylindrical rod 4 of piston 2 is located in hollow cylindrical housing 10 secured on housing 1 of hydraulic cylinder. Stepped cylindrical cups 5 are installed for reciprocating relative to cylindrical housing 10 and rod 4 proper on smaller diameter step of rod 4. One cup 5 engages with cover 8 of hydraulic cylinder housing 1 and with end face surface of rod 4. Other cup 5 engages with cover 9 of hollow cylindrical housing 10 and with nut secured on shank of rod 4. Distance spring 6 is arranged between inner end face surfaces of cups 5. Channels connected with hydraulic system of excavator are made in hydraulic cylinder housing 1.
EFFECT: provision of convenient operation, excluding manual shifting-in of neutral.
2 dwg
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