Angle measuring system with a clampable shaft

Abstract

The angular measuring system has a hollow pick-up shaft whose end is slitted, and the slitted area has an interior thread. A screw with an exterior thread is provided for clamping the pick-up shaft in a bore of a driveshaft. The screw is turned into the pick-up shaft until it is axially supported on a detent. By further turning of the screw the thread flanks of the interior thread and of the exterior thread cause the slit end of the pick-up shaft to be spread open radially.

1. An angle measuring system having a coding disk for measuring the angular position of a pick-up shaft and a clamping device for clamping the pick-up shaft, fixed against relative rotation, to a driveshaft of a drive unit, wherein the pick-up shaft has axial slits in the clamping area which can be radially spread open by an actuating element, the system comprising:
 a screw being the actuating element which can be turned in the pick-up shaft and which has an exterior thread in the clamping area; and  
 a corresponding interior thread on the pick-up shaft in the clamping area, wherein the screw has an axially acting detent surface which it is supported against an axial detent of the pick-up shaft during clamping.  
 
     
     
       2. The angle measuring system according to  claim 1  wherein the screw is guided through the pick-up shaft from the an end opposite the driveshaft, and the an end of the pick-up shaft facing the driveshaft has the slits. 
     
     
       3. The angle measuring system according to  claim 1  wherein the pick-up shaft is rotatably seated in a stator of the angle measuring system, and the stator is connected with the a stationary element of the drive unit by a coupling in a manner fixed against relative torsion, but radially and axially resilient. 
     
     
       4. The angle measuring system according to  claim 3  wherein the coupling is made of spring sheet metal with spring arms extending axially and parallel with each other and constitute a parallel guide which is fixed against relative torsion. 
     
     
       5. The angle measuring system of  claim 1 , wherein said actuating element is a unitary member. 
     
     
       6. The angle measuring system of  claim 1 , wherein said actuating element moves in a helical manner when operative. 
     
     
       7. An angle measuring system comprising a coding disk for measuring the angular position of a pick- up shaft and a clamping device for clamping the pick - up shaft, fixed against relative rotation, to a driveshaft of a drive unit, and a clamping element comprising a slit in a clamping area, the system comprising:      an actuating element that directly contacts said pick - up shaft and is operative to directly spread said slit when rotated within said pick - up shaft.     
     
     
       8. The angle measuring system of  claim 7 , wherein said actuating element comprises a screw that is turned in said pick- up shaft.   
     
     
       9. The angle measuring system of  claim 8 , wherein said screw comprises an exterior thread in said clamping area. 
     
     
       10. The angle measuring system of  claim 9 , wherein said pick- up shaft comprises an interior thread that corresponds to said exterior thread.   
     
     
       11. The angle measuring system of  claim 8 , wherein said screw comprises an axially acting detent surface that is supported against an axial detent of said pick- up shaft during clamping.   
     
     
       12. The angle measuring system of  claim 8 , wherein said screw is guided through said pick- up shaft from an end opposite said driveshaft, and an end of said pick - up shaft facing said driveshaft has said slit.   
     
     
       13. The angle measuring system of  claim 7 , wherein said pick- up shaft is rotatably seated in a stator of said angle measuring system, and said stator is connected with a stationary element of said drive unit by a coupling in a manner fixed against relative torsion, but radially and axially resilient.   
     
     
       14. The angle measuring system of  claim 13 , wherein said coupling is made of spring sheet metal. 
     
     
       15. The angle measuring system of  claim 13 , wherein said coupling comprises spring arms extending axially and parallel with each other and comprise a parallel guide which is fixed against relative torsion. 
     
     
       16. The angle measuring system of  claim 14 , wherein said coupling comprises spring arms extending axially and parallel with each other and comprise a parallel guide which is fixed against relative torsion. 
     
     
       17. The angle measuring system of  claim 7 , wherein said actuating element is a unitary member. 
     
     
       18. The angle measuring system of  claim 7 , wherein said actuating element moves in a helical manner when operative. 
     
     
       19. An angle measuring system comprising a coding disk for measuring the angular position of a pick- up shaft, the system comprising:      an actuating element;        a clamping element comprising a slit adjacent to said actuating element, said clamping element defining, at least in part, an opening in which said actuating element is inserted, wherein movement of said actuating element with respect to said slit causes said slit to radially spread open so that said pick - up shaft and a drive shaft engage one another so as to be fixed against relative rotation.     
     
     
       20. The angle measuring system of  claim 19 , wherein said actuating element comprises a screw that is turned in said pick- up shaft.   
     
     
       21. The angle measuring system of  claim 20 , wherein said screw comprises an exterior thread in said clamping area. 
     
     
       22. The angle measuring system of  claim 21 , wherein said pick- up shaft comprises an interior thread that corresponds to said exterior thread.   
     
     
       23. The angle measuring system of  claim 20 , wherein said screw comprises an axially acting detent surface that is supported against an axial detent of said pick- up shaft during clamping.   
     
     
       24. The angle measuring system of  claim 20 , wherein said screw is guided through said pick- up shaft from an end opposite said driveshaft, and an end of said pick - up shaft facing said driveshaft has said slit.   
     
     
       25. The angle measuring system of  claim 19 , wherein said pick- up shaft is rotatably seated in a stator of said angle measuring system, and said stator is connected with a stationary element of said drive unit by a coupling in a manner fixed against relative torsion, but radially and axially resilient.   
     
     
       26. The angle measuring system of  claim 25 , wherein said coupling is made of spring sheet metal. 
     
     
       27. The angle measuring system of  claim 25 , wherein said coupling comprises spring arms extending axially and parallel with each other and comprise a parallel guide which is fixed against relative torsion. 
     
     
       28. The angle measuring system of  claim 26 , wherein said coupling comprises spring arms extending axially and parallel with each other and comprise a parallel guide which is fixed against relative torsion. 
     
     
       29. The angle measuring system of  claim 19 , wherein said actuating element is a unitary member. 
     
     
       30. The angle measuring system of  claim 19 , wherein said actuating element moves in a helical manner when operative. 
     
     
       31. An angle measuring system comprising a coding disk for measuring the angular position of a pick- up shaft and a clamping device fixed against relative rotation relative to a drive shaft of a drive unit, wherein said clamping device comprising an axial slit in a clamping area that is radially spread open by an actuating element, the system comprising:      a screw comprising an exterior thread in said clamping area, wherein when said screw is turned said axial slit radially spreads open; and        said clamping device comprises an interior thread in said clamping area that corresponds to said exterior thread.     
     
     
       32. The angle measuring system of  claim 31 , wherein said screw comprises an axially acting detent surface that is supported against an axial detent during clamping. 
     
     
       33. The angle measuring system of  claim 31 , wherein said screw is guided through said pick- up shaft from an end opposite said driveshaft, and an end of said pick - up shaft facing said driveshaft has said slit.   
     
     
       34. The angle measuring system of  claim 31 , wherein said pick- up shaft is rotatably seated in a stator of said angle measuring system, and said stator is connected with a stationary element of said drive unit by a coupling in a manner fixed against relative torsion, but radially and axially resilient.   
     
     
       35. The angle measuring system of  claim 34 , wherein said coupling is made of spring sheet metal. 
     
     
       36. The angle measuring system of  claim 34 , wherein said coupling comprises spring arms extending axially and parallel with each other and comprise a parallel guide which is fixed against relative torsion. 
     
     
       37. The angle measuring system of  claim 35 , wherein said coupling comprises spring arms extending axially and parallel with each other and comprise a parallel guide which is fixed against relative torsion. 
     
     
       38. The angle measuring system of  claim 31 , wherein said actuating element moves in a helical manner when operative.