US 12,214,473 B2
Impact screwing/unscrewing device with idling control
Rémi Beguin, Nantes (FR); Pierre Guilbaud, Nantes (FR); and Benjamin Barbaud, Saint Herblain (FR)
Assigned to ETABLISSEMENTS GEORGES RENAULT, Saint Herblain (FR)
Appl. No. 18/259,167
Filed by ETABLISSEMENTS GEORGES RENAULT, Saint Herblain (FR)
PCT Filed Dec. 23, 2021, PCT No. PCT/EP2021/087549
§ 371(c)(1), (2) Date Jun. 23, 2023,
PCT Pub. No. WO2022/136662, PCT Pub. Date Jun. 30, 2022.
Claims priority of application No. 2014124 (FR), filed on Dec. 24, 2020.
Prior Publication US 2024/0051100 A1, Feb. 15, 2024
Int. Cl. B25B 23/147 (2006.01); B25B 21/02 (2006.01)
CPC B25B 23/1475 (2013.01) [B25B 21/026 (2013.01)] 21 Claims
OG exemplary drawing
 
1. An impact screwing/unscrewing device comprising:
an electric motor comprising a rotor having an axis of rotation;
a controller, wherein the controller is configured to transmit a command instruction to said motor; and
an impact mechanism comprising:
at least one anvil mounted such that the at least one anvil can rotate about the axis of rotation of said rotor;
at least one hammer which is rotatable by said motor about said axis of rotation, said at least one hammer being movable between at least:
a non-engaged position in which the at least one hammer is not capable of colliding with said at least one anvil when the at least one hammer is rotated by said motor, and
an engaged position in which the at least one hammer is capable of colliding with said at least one anvil when the at least one hammer is rotated by said motor,
wherein a variation of said command instruction supplied to said motor by said controller triggers passage of said at least one hammer from one of the non-engaged position and the engaged position to the other;
wherein said controller is configured to control said motor to carry out a screwing or unscrewing operation comprising a series of successive impact cycles during each of which the at least one hammer collides with the at least one anvil,
said controller being configured to generate, during each impact cycle, a variation of said command instruction supplied to said motor, said variation triggering passage of said at least one hammer from one of the non-engaged position and the engaged position to the other.