Rotary cam driven sensor and feedback control
First Claim
1. A shaft angle sensing arrangement for a steerable axle comprising a shaft connected to a steering arm and rotatable about a shaft axis within shaft mounting structure, a cam mounted on the shaft for rotation with the shaft about the shaft axis, a support area on the shaft mounting structure, the cam having a cam surface, wherein distance between the cam surface and the support area varies as the shaft rotates, and a displacement transducer carried by the support area and including a contact member engaging the cam surface, wherein rotation of the shaft causes the contact member to move dependent on the angular position of the shaft.
1 Assignment
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Accused Products
Abstract
A shaft angle sensing arrangement for an implement steerable axle includes a shaft rotatable about a shaft axis within shaft mounting structure, a cam ring with a cam surface mounted over the shaft, and a threaded aperture in the axle housing adjacent the cam surface. As the cam ring rotates with the shaft, the distance between the cam surface and the support area varies. A displacement transducer threaded into the aperture includes a contact member engaging the cam surface so that rotation of the shaft causes the contact member to move dependent on the angular position of the shaft to provide a shaft position feedback signal to an automatic position controller or readout device.
28 Citations
20 Claims
- 1. A shaft angle sensing arrangement for a steerable axle comprising a shaft connected to a steering arm and rotatable about a shaft axis within shaft mounting structure, a cam mounted on the shaft for rotation with the shaft about the shaft axis, a support area on the shaft mounting structure, the cam having a cam surface, wherein distance between the cam surface and the support area varies as the shaft rotates, and a displacement transducer carried by the support area and including a contact member engaging the cam surface, wherein rotation of the shaft causes the contact member to move dependent on the angular position of the shaft.
- 11. A steering angle sensing arrangement comprising a kingpin rotatable about a kingpin axis within axle structure, a cam mounted on the kingpin for rotation about the kingpin axis and including a cam surface rotatable with the kingpin, the axle structure including a transducer support area, and a displacement transducer carried by the transducer support area and including a contact member engaging the cam surface, wherein rotation cam surface causes the contact member to move and provide a steering signal dependent on the angular position of the shaft.
Specification