US 12,466,099 B2
Electromagnetic drive for a cutting device of a textile machine, cutting device and yarn clearer
Charles Leopold Elisabeth Dumoulin, Balgach (CH)
Assigned to Saurer Intelligent Technology AG, Arbon (CH)
Filed by Saurer Intelligent Technology AG, Arbon (CH)
Filed on Nov. 4, 2022, as Appl. No. 17/981,122.
Claims priority of application No. 21206580 (EP), filed on Nov. 4, 2021.
Prior Publication US 2023/0136281 A1, May 4, 2023
Int. Cl. B26D 5/08 (2006.01); H01K 7/06 (2006.01); H02K 7/06 (2006.01); H02K 7/14 (2006.01)
CPC B26D 5/086 (2013.01) [H02K 7/06 (2013.01); H02K 7/14 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An electromagnetic drive (1) for a cutting device of a textile machine, the electromagnetic drive (1) comprising:
a solenoid (2);
a piston (3) configured to drive a cutting blade carrier (13), wherein:
the piston (3) is guided for linear movement within the solenoid (2), and
the piston (3) is configured to be linearly moved between a rest position and a working position; and
an axial air gap (6), between an end face (7) of the piston (3) and an end face (8) of a core tube (9) of the solenoid (2), wherein:
the core tube (9) is stationary relative to the piston (3), and
the axial air gap (6) is varied based on movement of the piston (3), and
wherein:
the piston (3) is at least partly hollow, and
the piston (3) has a first piston segment (3A) and a second piston segment (3B),
wherein:
the first piston segment (3A) is positioned outside of the core tube (9),
the second piston segment (3B) is fixed to the first piston segment (3A),
a free end of the second piston segment (3B) protrudes from the solenoid (2) and extends from the first piston segment (3A) through the core tube (9),
the free end of the second piston segment (3B) is configured to carry the cutting blade carrier (13), and
the first piston segment (3A) is hollow on a side facing away from the cutting blade carrier (13), forming a chamber configured to receive a portion of the second piston segment (3B).