Operation of Industrial Safety Couplings
FULL-DISENGAGEMENT VERSION (F)
Features of the safety coupling:
- In the event of an overload, the driving and driven ends of the coupling are fully disengaged.
- The ball-detent plunger modules have an internal catch which holds the drive ball back from the detent flange once released.
- The spring preload and corresponding disengagement torque are continuously adjustable.
- The safety coupling requires manual re-engagement.
- The safety coupling can also be disengaged manually.
R+W safety couplings can generally be divided into two groups. One group includes the automatic re-engagement version, in which the spring pressure applied to the ball-detent system is constant, allowing the clutch to re-engage by itself once the torque and speed have been reduced. The other is the full-disengagement version of the industrial series safety couplings.
These types re-engage automatically after the overload has passed. In machines where angular timing is critical, the single position version is used. This type re-engages precisely 360° from it’s disengagement point, eliminating the need for time-consuming adjustments after the overload incident. Another type is the multi-position version, which re-engages at a standard angle of 60° with optional engagement angles of 30, 45, 90 and 120°.
Type 2: Full disengagement
Machinery running at higher speeds should not use automatically re-engaging safety couplings, as the ball-detent mechanism can wear rapidly after disengagement at a high rotational velocity. The full disengagement system was developed specifically for these situations. When an overload occurs, the disc spring snaps completely over center and causes a complete disengagement of the driving and driven ends of the coupling. In its standard configuration these types can be re-engaged at up to 6 different angular positions.