US 12,343,855 B2
Spring element and coupling device
Maximilian Knyrim, Ehingen (DE)
Assigned to Hilti Aktiengesellschaft, Schaan (LI)
Appl. No. 18/038,117
Filed by Hilti Aktiengesellschaft, Schaan (LI)
PCT Filed Nov. 11, 2021, PCT No. PCT/EP2021/081345
§ 371(c)(1), (2) Date May 22, 2023,
PCT Pub. No. WO2022/112010, PCT Pub. Date Jun. 2, 2022.
Claims priority of application No. 20210523 (EP), filed on Nov. 30, 2020.
Prior Publication US 2024/0100676 A1, Mar. 28, 2024
Int. Cl. B25B 27/10 (2006.01); B25B 27/14 (2006.01); B25F 5/00 (2006.01)
CPC B25F 5/00 (2013.01) 12 Claims
OG exemplary drawing
 
1. A power tool comprising:
a drive;
a transmission device;
a threaded spindle drive;
a linear actuator, a torque generated by the drive being transmissible via the transmission and the threaded spindle drive to the linear actuator;
a coupling for converting a rotational movement generated by the transmission into a linear movement, to be transmitted to the threaded spindle drive, from the transmission device to the threaded spindle drive; and
at least one spring for reducing torsion acting on the coupling
wherein the transmission device includes:
a drive eccentric;
a compensating coupling; and
an eccentric gear, wherein the eccentric gear comprises an aperture for a ball bearing; wherein the eccentric gear is positioned in a ring gear, the ring gear being rotationally fixed to a housing of the power tool;
wherein the coupling has a sleeve and is mounted in the housing of the power tool by a main bearing and a secondary bearing, the main bearing being placed on the second diameter of the sleeve and the secondary bearing being placed on the first diameter of the sleeve.