| 摘要 |
Electro-hydraulic jack for cars provides for continual lifting and lowering the cars. Construction of the jack consists in that that in the body (1) is mounted a pump (11) and a valve (12) with a stopper (14), then set a valve (13), and then in the body (1) set a stopper (15), thereupon fix the derrick (2).In the derrick (2) there is a piston (3) with a stopper (4), and then set a cover (7), and mount a carrier (5) with a platform (6) glued thereon. In the body (1) pour in oil (20), then set a stopper (10) and close the body (1) with the cover (9), fixe it by the screws (16), thereupon mount the electric motor (8) with a conductor (17), and a switch (18) and a socket (19) and couple it with a coupling (21). Jack operates in so that the platform (6) is set on the spot of the rest, switch off the switch (18) and switch on the socket (19). Switching on the electric motor (8) by the switch (18), a pump (11) is driven over the coupling (21) and the oil (20) presses through the channel (22) and through the valves (12) and through the channel (25) in the direction (A). By opening the valve (13), oil (20) through a channel (26) goes into the derrick (2) acting upon the piston (3) and presses it in the direction (E). Turning the valve (13) in the opposite direction, oil (20) returns into a chamber (28), and direction (B), and then the load lowers down.
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