Screw device and hand-held screw system
The invention relates to a screw device for applying torque to a screw partner ( 12 ), comprising flat output assembly ( 10 ) provided with an output member that can be detachably connected to the screw partner and a drive to which a drive torque can be manually or mechanically applied, particularly by an interconnected angular and/or bevel gear ( 16 ), and an assembly ( 48 ) for detecting an output torque acting on the screw partner on the output side, the detection assembly associated with the flat output assembly and particularly provided on and/or in a housing ( 30 32 ) of the flat output assembly being designed such that it can detect an axial force acting on a helical gear ( 38 ) connecting the drive and the output member of the flat output assembly in a torque-transmitting manner and provide same for preferably electronic signal evaluation.
1. A screwing device for applying a torque to a screwing partner ( 12 ),
the screwing device comprising flat output means ( 10 ) having an output which is detachably connectable to the screwing partner and a drive to which a driving torque can be applied manually or mechanically, via an interposed angular and/or bevel gearing ( 16 ),
and comprising means ( 48 ) for detecting an output torque acting on the screwing partner at the output side,
wherein
the detecting means assigned to the flat output means and provided in particular on and/or in a housing ( 30 , 32 ) of the flat output means are configured in such a manner that they detect an axial force acting on a helical gear wheel ( 38 ) which connects the drive and the output of the flat output means in a torque-transmitting manner, and can make said axial force available for signal evaluation.
2. The device according to claim 1 , wherein the flat output means have the helical gear wheel ( 38 ) between a drive module ( 20 ), which has teeth and which forms the drive, and an output module ( 24 ), which has teeth and which forms the output, or wherein the helical gear wheel forms the output module.
3. The device according to claim 2 , wherein a plurality of gear wheels ( 34 , 36 , 38 ) forming a gear assembly between the drive and the output are provided between the drive module and the output module.
4. The device according to claim 3 , wherein the helical gear wheel meshes with the output module ( 24 ).
5. The device according to claim 1 , wherein the helical gear wheel ( 38 ) is mounted to rotate about an axis of rotation ( 52 ) which extends at an angle of ≥45° to a longitudinal axis of the flat output means,
the detecting means ( 48 ) detecting the axial force by the effect of a gear wheel shaft ( 40 , 42 ) which forms the axis of rotation and/or at the edge of the teeth of the helical gear wheel.
6. The device according to claim 5 , wherein the angle is 90°.
7. The device according to claim 1 , wherein the detecting means are realized as pressure and/or force sensor means ( 48 ) which are assigned to the helical gear wheel ( 38 ) in a force-fitting manner.
8. The device according to claim 7 , wherein the pressure and/or force sensor means are realized as a piezoelectric force sensor ( 48 ) or by strain gauges.
9. The device according to claim 7 , wherein the pressure and/or force sensor means ( 48 ) are assigned to the helical gear wheel ( 38 ) in an axially adjacent manner.
10. The device according to claim 7 , wherein the pressure and/or force sensor means ( 48 ) are supported on a housing side and/or flat side ( 30 ) of the flat output means.
11. The device according to claim 1 , wherein the detecting means have means for signal transmission of a detection signal corresponding to the detected output torque.
12. The device according to claim 11 , wherein the means for signal transmission are means for wireless signal transmission of the detection signal corresponding to the detected output torque.
13. The device according to claim 1 , wherein the detecting means have hydraulic or pneumatic means which translate the axial force into a fluid pressure and which establish fluid communication with a fluid pressure sensor.
14. The device according to claim 13 , wherein the hydraulic or pneumatic means are provided on or in a gear wheel shaft realizing the axis of rotation of the helical gear wheel.
15. The device according to claim 13 , wherein the fluid pressure sensor is assigned to a housing of the flat output means.
16. The device according to claim 15 , wherein the fluid pressure sensor is on or in said housing.
17. The device according to claim 1 , wherein the detecting means have electronic interface means and/or signal processing means and electrical energy supply means.
18. The device according to claim 17 , wherein the electrical energy supply means are realized as electric generator means interacting with a mobile, rotating, component of the flat output means.
19. Handheld screwing system having the screwing device according to claim 1 , wherein and driving torque generating means ( 18 ) connected to the flat output means at the driving side.
20. The device according to claim 1 , wherein said signal evaluation is electronic signal evaluation.