Worm Gear Screw Jacks, Standard Version; Safety Worm Gear Screw Jacks; Safety Nut (Wear Monitoring) - Pfaff SHE Series Operating Instructions Manual

Worm gear screw jack SHE type1 and type2
GB
High-performance screw jack HSE type1 and type2
General information
6

Worm gear screw jacks, standard version

1
2
3
4
5
Feature
Rotating worm wheel Ba1
Lifting screw Ba1
Rotating screw Ba2
Lifting travelling nut Ba2
SHE:
HSE:
Thread spindle
Suitable for an ambient temperature
-10 to +40 °C
6.1

Safety worm gear screw jacks

The worm gear screw jacks are equipped with a long safety nut, and an electric nut breakage monitoring
system for lifting tables acc. to EN 1570-1, elevating work platforms acc. to DIN EN 280, vehicle lifts acc. to
DIN EN 1493 and stages and studios acc. to BGV C1/DIN56950-1.
The manufacturer is responsible for the risk assessment of the entire system.
Feature
Safety nuts
Visual wear indicator
Electrical nut breakage monitoring
Self-locking/self-braking spindle
option
Speed monitoring option
Standstill monitor option
Load monitor option
The selection of self-locking or braking options must be made on a case by case basis, taking into
account the complete system. Depending on lift speed and positioning accuracy, additional brake(s) will
be required.

Safety nut (wear monitoring)

Subject to technical modifications
1
2
3
4
5
Description
Translation thread or ball screw nut integrated into the worm wheel
Trapezoidal thread, buttress thread, multiple trapezoidal thread, ball
screw
From worm gear propelled trapezoidal, buttress, or ball thread spindle.
Travelling nut conducts the lift movement.
Worm gear with grease lubrication
Worm gear with oil lubrication
with grease lubrication
If the temperatures deviate from these specifications, the design must
be adapted by our technical office.
Description
To protect against falling of the load in case of wear of the carrying nut.
For monitoring the wear of the carrying nut
For monitoring the carrying nut for breakage
On lift devices that must safely brake in the event of the failure of a
connection element, worm gear screw jacks with self-locking or self-
braking screws are required
To monitor the synchronisation of all screw jacks or the standstill of a
screw jack in one lifting system with several worm gear screw jacks.
Electronic load monitor for monitoring the power of the drives
Design changes under reserve
T13.01.000.0000.0003
2019/04 Rev. Index E
1
1
6
6
2
2
3
3
4
4
Sous réserve de modifications techniques !
1 Screw
2 Worm wheel
3 Worm
4 Housing
5 Sheath tube
6 Travelling nut
11