A cylinder includes a piston moving in a cylinder housing fastened to a cylinder rod and rotatable about a cylinder longitudinal axis, and a position sensor comprising a sensor magnet and a sensor element, which interacts with the sensor magnet and which is configured to detect a cylinder rod position relative to the cylinder housing. The sensor magnet is fastened on the cylinder rod rotatably with respect to the cylinder rod and is guided non-rotatably with respect to the cylinder housing.
1. A cylinder comprising:
a piston movable in a cylinder housing, the piston being fastened to a cylinder rod and rotatable about a cylinder-rod longitudinal axis;
a position sensor configured to detect a cylinder-rod position relative to the cylinder housing, the position sensor including a sensor magnet;
a sensor element interactable with the sensor magnet, the sensor magnet being:
fastened to and rotatable with respect to the cylinder rod; and
guidable in a rotationally fixed manner with respect to the cylinder housing; and
an adapter fastened to the sensor magnet, the adapter being:
free of magnetized material on a side facing away from the sensor element; and
fastened to the cylinder rod non-displaceably in at least one direction with respect to the longitudinal direction of the cylinder rod, wherein the adapter is configured to be guided in a guide sleeve in a rotationally secured manner about the cylinder-rod longitudinal axis, and wherein the adapter has a guide groove configured to engage a guide lug of the guide sleeve.
2. The cylinder according to claim 1 , wherein the sensor magnet extends exclusively over a portion of a cylinder-rod circumferential angle of the cylinder rod.
3. The cylinder according to claim 2 , wherein the sensor magnet extends over less than a third of the cylinder-rod circumferential angle of the cylinder rod.
4. The cylinder according to claim 2 , wherein the sensor magnet is circular segment-shaped.
5. The cylinder according to claim 2 , wherein the sensor magnet extends over less than one fifth of the cylinder-rod circumferential angle of the cylinder rod.
6. A gear actuator for a gearbox, comprising the cylinder according to claim 1 , the cylinder being configured to shift a gate, and the cylinder rod being coupled to a gate rod of the gearbox.
7. A gearbox having the gear actuator according to claim 6 .
8. A cylinder comprising:
a piston movable in a cylinder housing, the piston being fastened to a cylinder rod and rotatable about a cylinder-rod longitudinal axis;
a position sensor configured to detect a cylinder-rod position relative to the cylinder housing, the position sensor including a sensor magnet;
a sensor element interactable with the sensor magnet, the sensor magnet being:
fastened to and rotatable with respect to the cylinder rod; and
guidable in a rotationally fixed manner with respect to the cylinder housing; and
an adapter fastened to the sensor magnet, the adapter being:
free of magnetized material on a side facing away from the sensor element; and
fastened to the cylinder rod non-displaceably in at least one direction with respect to the longitudinal direction of the cylinder rod, wherein:
the cylinder rod has a stop for the adapter;
the piston comprises a spring fastened in a rotationally secured manner relative to the cylinder housing and configured to prestress the adapter against the stop; and
the adapter is fastened to the spring in a rotationally secured manner such that the adapter is rotationally secured relative to the cylinder housing.
9. The cylinder according to claim 8 , wherein the adapter is configured to be guided in a guide sleeve in a rotationally secured manner about the cylinder-rod longitudinal axis.
10. The cylinder according to claim 8 , wherein the spring is a helical spring.
11. The cylinder according to claim 8 , wherein the sensor magnet extends exclusively over a portion of a cylinder-rod circumferential angle of the cylinder rod.
12. The cylinder according to claim 11 , wherein the sensor magnet extends over less than a third of the cylinder-rod circumferential angle of the cylinder rod.
13. The cylinder according to claim 11 , wherein the sensor magnet is circular segment-shaped.
14. The cylinder according to claim 11 , wherein the sensor magnet extends over less than one fifth of the cylinder-rod circumferential angle of the cylinder rod.
15. A gear actuator for a gearbox, comprising the cylinder according to claim 8 , the cylinder being configured to shift a gate, and the cylinder rod being coupled to a gate rod of the gearbox.
16. A gearbox having the gear actuator according to claim 15 .