发明名称 |
Device for controlling a gear box of a vehicle, particularly an agricultural tractor |
摘要 |
The device comprises a lever movable by the operator between at least two working positions and a neutral position to achieve, by means of an hydraulic actuator of double acting follower type, of the gear ratios in one stage of the gear box. The actuator comprises a piston slidable between two working positions and one neutral position to actuate engagement means and defining two chambers; and a shaft connected to the lever by means of a motion transfer unit and shaped as an hydraulic distributor in such a way that in the neutral position of the lever the chambers are connected to a discharge opening so as to determine the neutral position of the piston, and in a manner and in an operative position the stroke of the shaft causes communication of one chamber with the opening and of the other with an inlet opening for a fluid under pressure such that the pressure will translate the piston in the same direction and with the same stroke as the shaft. (FIG. 4).
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申请公布号 |
US5142927(A) |
申请公布日期 |
1992.09.01 |
申请号 |
US19900613067 |
申请日期 |
1990.11.15 |
申请人 |
FIATGEOTECH-TECNOLOGIE PER LA TERRA S.P.A. |
发明人 |
AMEDEI, GIUSEPPE;RONDELLI, ANGELO |
分类号 |
F16H61/30 |
主分类号 |
F16H61/30 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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