Siemens SIMOTICS M-1PH8 - Page 187

Structure
The solenoid housing ⑦ with the cast excitation winding ⑥ is used to accommodate the
armature ②, the friction disk ③ and the 󹪞ange ④ that is attached using cylinder head screws.
The compression springs in the solenoid housing that are supported via the thrust studs (size 13)
on the adjustment ring ⑨, apply a force to the friction disk via the anchor in the axial direction
and thus clamp the friction disk between the rigidly mounted 󹪞ange and the anchor and produce
the braking e󹪜ect (torque). The tangent torque support of the armature against the solenoid
housing is performed by the dowel pins.
When a direct voltage is applied to the excitation winding, the resulting electromagnetic
force pulls the armature against the force of the compression springs, the friction disk is
released and thus the braking e󹪜ect canceled.
As the brake module represents a self-contained system, no forces are applied externally.
The braking e󹪜ect of the axial moving friction disk is transmitted to the driver pin shaft ⑧
󹪝xed to the motor shaft via the keyed connection of the internal square socket (sizes 13, 19
and 24) and/or via internal gearing (size 29).
The ball bearing located between the solenoid housing and the driver pin shaft is used to
center the brake to the driver pin shaft and therefore to the motor shaft when mounting
the brake on the motor 󹪞ange and also to absorb the transverse forces acting radially on the
driver pin shaft.
The ball bearing comes sealed from the factory. As additional protection against pollution
and to prevent grease from a defective ball bearing seal reaching the friction disk, a sealing
ring is mounted that prevents dirt, grease or oil reaching the area of the friction disk from the
outside and abraded particles due to the wear of the friction disk escaping.
The sealing ring provides the drive-side sealing between the 󹪞ange and the driver pin shaft.
The single-disk spring-operated brake module can be opened mechanically by hand, e.g. in
the event of a power failure, via the optional manual release ①. The electrical connection is
established directly in the terminal box ⑤.
The transmissible torque of the brake module can be set via the adjustment ring.
Motor components and options
5.2Options
1PH8 SIMOTICS M main motors
Con󹪝guration Manual, 12/2022, A5E51895839A 185