公开(公告)号：US4286386A

公开(公告)日：1981-09-01

申请号：US70485

申请日：1979-08-28

申请人： Irvin E. Long

发明人： Irvin E. Long

IPC分类号： F15B15/28 ,  G01D5/165 ,  G01B7/02

CPC分类号： F15B15/283 ,  G01D5/165

摘要： A displacement measuring device is disclosed that is particularly useful for measuring and remotely indicating the displacement of a piston rod relative to the cylinder of a power actuator of an earth working implement. The device includes a variable resistor controlled by a gearless actuator connected with the piston rod so that the effective resistance of the resistor is varied depending upon the axial displacement of the piston rod relative to the cylinder. An indicator is connected by electrical circuitry with the variable resistor to display the amount of piston rod displacement relative to the cylinder. A plurality of embodiments of the device are disclosed with one disclosed embodiment including a cable wound about a pulley mounted on the rotatable control shaft of the variable resistor with the cable having one end fastened to the piston rod and a retraction spring to maintain the cable taut regardless of piston displacement in either axial direction. The other disclosed embodiments include a linear resistant element mounted on either the cylinder or the piston rod with a wiper arm engaging the resistance element so that the effective resistance is varied depending upon the amount of piston rod displacement relative to the cylinder and a cylinder mounted pivotable first rod pivoted by a second rod mounted on the piston rod so that pivoting of the first rod in one direction causes a finger to be pivoted to rotate the control shaft of a variable resistor to thus vary the effective resistance of the resistor.

摘要翻译： 公开了一种位移测量装置，其特别用于测量和远程地指示活塞杆相对于地球工作装置的动力致动器的气缸的位移。 该装置包括由与活塞杆连接的无齿轮致动器控制的可变电阻器，使得电阻器的有效电阻根据活塞杆相对于气缸的轴向位移而变化。 指示器通过电路与可变电阻器相连，以显示相对于气缸的活塞杆位移量。 公开了该装置的多个实施例，其中一个公开的实施例包括缠绕在安装在可变电阻器的可旋转控制轴上的滑轮上的电缆，电缆具有一端固定到活塞杆上，并且回缩弹簧用于保持电缆拉紧 无论在任何轴向方向上的活塞位移。 其他公开的实施例包括安装在气缸或活塞杆上的线性阻力元件，其具有与电阻元件接合的刮水器臂，使得有效阻力根据相对于气缸的活塞杆位移量而变化， 第一杆由安装在活塞杆上的第二杆枢转，使得第一杆在一个方向上的枢转使得手指枢转以旋转可变电阻器的控制轴，从而改变电阻器的有效电阻。