| 摘要 |
1. Sensor controlled pivot device actuated by fluid for tools advanced in one moving direction, particularly for verge mowers, for providing a yielding movement of the tool when the sensor hits an obstacle, in which a) the sensor (22) is formed by an elongated sensor body (24) extending at a distance from the tool (16) and supported pivotally against the moving direction of the tool, and b) a servomotor (18) actuated by fluid is adapted to be energized by a deflecting movement of the sensor body (24) in order to pivot the tool against said moving direction, characterized in that c) a first and a second control member (26, 28) is provided for controlling the servomotor (18), which control members (26, 28) are adapted to apply a fluid current to the servomotor (18) in order to pivot the tool (16) against the moving direction and in order to pivot the tool (16) in the moving direction, respectively, d) the control members (26, 28) are adapted to be actuated by the deflecting movement of the sensor body (24) through a first actuating member (30), e) the control members (26, 28) are arranged on a first support (32), which, according to the pivoting of the tool (16), is movable relative to the first actuating member (30) in order to act against the actuation, f) a throttle valve (34) is connected in parallel with the servomotor (18), the flow cross section of which throttle valve (34) is variable through a second actuating member (36) according to the deflection of the sensor body (24) in order to reduce the flow cross section when the deflection increases. |
