Fall safety device
A fall safety device is provided having a load-bearing rotor 2 , which supports at least one locking member 6 , which can be moved by centrifugal force and which is moved into engagement with at least one stop 7 b of a stator 4 if a certain rotor speed is exceeded and blocks the further rotation of the rotor 2 . The locking member 6 and/or the stop 7 b is in active connection with a braking body 8 , which undergoes a plastic deformation when engaging the fall safety device and damps the stopping process.
1. Fall safety device comprising a load-bearing rotor ( 2 , 12 ), which supports at least one locking member ( 6 ), which can be moved by centrifugal force and which interacts with at least one stop ( 7 b ) of a stator ( 4 ) if a predetermined rotor speed is exceeded and blocks further rotation of the rotor, the locking member ( 6 ) and/or the stop ( 7 b ) is in active connection with at least one braking body ( 8 ), which undergoes plastic deformation when the fall safety device is blocked and which damps a blocking process, the braking body ( 8 ) is arranged in at least one chamber ( 14 , 14 a , 14 b ) of the device.
2. Fall safety device according to claim 1 , wherein the braking body ( 8 ) slides along at least one chamber wall during the plastic deformation thereof.
3. Fall safety device comprising a load-bearing rotor ( 2 , 12 ), which supports at least one locking member ( 6 ), which can be moved by centrifugal force and which interacts with at least one stop ( 7 b ) of a stator ( 4 ) if a predetermined rotor speed is exceeded and blocks further rotation of the rotor, the locking member ( 6 ) and/or the stop ( 7 b ) is in active connection with at least one braking body ( 8 ), which undergoes plastic deformation when the fall safety device is blocked and which damps a blocking process, the deformation of the braking body ( 8 ) is realized in a form of flattening of the braking body.
4. Fall safety device according to claim 1 , wherein the at least one locking member ( 6 ) that can move due to centrifugal force blocks the further rotation of the rotor ( 2 ) if the predetermined rotor speed is exceeded also upon overloading or failure of the braking body ( 8 ).
5. Fall safety device according to claim 1 , wherein the deformation of the braking body ( 8 ) is realized at least approximately in a circumferential direction of the rotor.
6. Fall safety device according to claim 1 , wherein a plurality of stops ( 7 b ) are arranged on a rotating ratchet wheel ( 7 ), and the ratchet wheel ( 7 ) includes at least one projection ( 7 a , 7 c ) supported in a circumferential direction by at least one deformable braking bodies ( 8 ) on the stator ( 4 ).
7. Fall safety device according to claim 1 , wherein the deformation of the braking body ( 8 ) is realized at least approximately in an axial direction of the rotor.
8. Fall safety device according to claim 1 , wherein the rotor ( 2 ) has two opposing threads ( 2 a , 2 b ), on each of which a disk ( 17 a , 17 b ) can rotate, the disks ( 17 a , 17 b ) being adapted to perform an axial shift and/or relative rotation during a blocking process in order to deform the at least one braking body ( 8 ).
9. Fall safety device according to claim 8 , wherein the braking body ( 8 ) is arranged between the disks ( 17 a , 17 b ).
10. Fall safety device according to claim 1 , wherein the deformable braking body ( 8 ) has a plurality of recesses ( 8 a ), perforations or pores.
11. Fall safety device according to claim 10 , wherein the deformable braking body ( 8 ) is formed of several flattenable deformation bodies made from ductile metal.
12. Fall safety device according to claim 11 , wherein the braking body has an element ( 14 ) to receive its possible deformation, which if necessary is in active connection with the lifting drive with the fall safety device.
13. Fall safety device according to claim 1 , wherein the deformable braking body ( 8 ) is arranged in a groove in at least one of the stator and rotor.
14. Fall safety device according to claim 13 , wherein the at least one locking member ( 6 ) is held on the rotor ( 2 , 12 ) by a snap-in connection ( 4 ).
15. Fall safety device according to claim 1 , wherein a snap-in connection ( 9 ) can be adjusted in terms of a holding force via a pretensioned locking element.
16. Fall safety device according to claim 15 , wherein at least two locking members ( 6 ) are provided, which are in active connection with each other such that they can only be jointly moved into engagement with associated stops ( 7 b ).
17. Fall safety device according to claim 16 , wherein the two locking members ( 8 ) are connected to each other by at least one mutually hinged lever ( 11 ).
18. Fall safety device according to claim 1 , wherein the locking member ( 6 ) is fixed in an engagement position for deformation of the braking body ( 8 ).
19. Fall safety device according to claim 18 , wherein relative rotation between ratchet wheel ( 7 ) and stator ( 4 ) triggers a fixing of the locking member ( 6 ) in the engagement position.
20. Fall safety device according to claim 19 , wherein relative rotation creates an axial shift of the ratchet wheel ( 7 ) and the ratchet wheel in its shifted position blocks a release of the locking member ( 6 ) from its engagement position.