Clamping/Braking Systems HMSB Electromagnetic Rod brake
Clamping/Braking Systems HMSB Electromagnetic Rod brake
Clamping/Braking Systems HMSB Electromagnetic Rod brake
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10<br />
<strong>Clamping</strong> and<br />
<strong>Braking</strong> <strong>Systems</strong><br />
Order and request forms available at: www.hema-schutz.de<br />
<strong>Clamping</strong>/<strong>Braking</strong> <strong>Systems</strong><br />
<strong>HMSB</strong> <strong>Electromagnetic</strong> <strong>Rod</strong> <strong>brake</strong><br />
The <strong>HMSB</strong> is a compact, electromagnetic rod <strong>brake</strong> that can<br />
be used as a service, retaining, or emergency stop <strong>brake</strong>.<br />
It operates with a spring energy<br />
storage device (with a tried and tested spring) and is vented<br />
electromagnetically. In the standard version, it can also be<br />
used as a safety <strong>brake</strong> (failsafe principle).<br />
<strong>HMSB</strong> elektromagnetic rod <strong>brake</strong> in horizontal application<br />
The <strong>HMSB</strong> as a <strong>brake</strong><br />
Under the action of spring force, a conical bush is forced along<br />
its axis into a likewise conical hole in the housing. The internal<br />
diameter of the bush then causes a cross sectional constriction,<br />
exerting a high clamping force on the rod running through the<br />
centre.<br />
<strong>Clamping</strong> with cup spring assembly<br />
(tried and tested spring)<br />
<strong>HMSB</strong> as a <strong>brake</strong>, clamped<br />
Control electronics for<br />
the electromagnet<br />
Magnet winding<br />
The conical bush directs the braking<br />
force to the rod.<br />
Thrust pins transfer the<br />
magnetic force to the<br />
conical bush for disengaging<br />
the <strong>brake</strong>.<br />
The bush's conical angle serves to amplify the spring force.<br />
The bush is made of a special bearing material that cannot<br />
damage the rod (usually of hardened steel).<br />
►<br />
►<br />
Magnet<br />
armature<br />
Magnetic travel<br />
(magnet deenergised)<br />
The <strong>brake</strong> is disengaged when the clamping bush is pressed<br />
out of its conical seat against the spring force. For this<br />
purpose, an electromagnet embedded directly in the <strong>brake</strong><br />
housing is energised and exerts a high attractive force on a<br />
flat armature. By means of freely moving pins leading<br />
through the magnet housing, this attractive force induces a<br />
compressive force in the conical bush that then acts on the<br />
springs.<br />
The rated voltage for this magnetic drive is 400 Vac. Once the<br />
attractive force has been built up, the power draw is less than<br />
15 VA. The electronic controller is integrated in the rod clamp's<br />
housing, requiring only that the supply voltage is activated<br />
(for disengaging the <strong>brake</strong> and keeping it disengaged) or<br />
deactivated (braking) from the outside.<br />
<strong>HMSB</strong> in vertical application<br />
In the pure <strong>brake</strong> version, the conical bush clamping the rod is<br />
not connected firmly to the <strong>brake</strong> housing.<br />
When aligned correctly, the <strong>brake</strong>d mass fastened to the<br />
housing also presses against the bush, thereby acting as a<br />
<strong>brake</strong> booster.<br />
<strong>HMSB</strong>-20<br />
nominal contact force 8 - 14 kN<br />
weight ca. 20 kg<br />
total length of <strong>HMSB</strong> 199 mm<br />
installation space (ca. LxBxH) 199x120x120 mm<br />
rod diameter Ø 20 mm<br />
rated voltage 400 VAC<br />
operating voltage 230...400 VAC<br />
rated frequency (switchable) 50/60 Hz<br />
rated power 2kVA breakway phase<br />
<strong>HMSB</strong> <strong>Electromagnetic</strong> <strong>Rod</strong> <strong>brake</strong><br />
This self locking mechanism can be utilised for emergency<br />
braking (e.g. as an antifall device on a vertical arrangement).<br />
This causes such a high clamping force that the magnet is no<br />
longer able to disengage the <strong>brake</strong>.<br />
The <strong>brake</strong> must then be moved counter to the direction of<br />
braking so that the magnet can overcome this clamping force.<br />
When the max aggregate load (static and dynamic loads) does<br />
not exceed the <strong>brake</strong>'s nominal force, the magnetic force can<br />
disengage the <strong>brake</strong> without the need to move it.<br />
The pure <strong>brake</strong> version features a conical bush that moves<br />
relative to the housing, so the <strong>HMSB</strong> cannot be positioned to<br />
any precision. This, however, is not a necessity for braking, i.e.<br />
stopping within a particular braking distance.<br />
The <strong>HMSB</strong> as a rod clamp<br />
Applications requiring high precision positioning can use<br />
the rod clamp version. In this version, the conical bush is<br />
connected firmly to the housing. This also means that there is<br />
no self boosting from the working load.<br />
The spring presses against a freely moving hub with internal<br />
cone that also receives the magnetic force for disengaging the<br />
<strong>brake</strong>.<br />
<strong>HMSB</strong> as a rod clamp, disengaged<br />
<strong>HMSB</strong> as a rod clamp, engaged<br />
All dimensions in mm if not marked otherwise. Errors and omissions excepted.<br />
Dimensions <strong>HMSB</strong><br />
80<br />
45°<br />
rod Ø 20<br />
M10<br />
69,5<br />
80<br />
reference circle Ø 132<br />
(4xM10)<br />
120<br />
60<br />
4 x M8<br />
199<br />
4 x M8<br />
90<br />
69,5<br />
42 115 42<br />
54<br />
12<br />
60<br />
length of thread 12<br />
screw-in depth 54<br />
69,5<br />
M10<br />
120<br />
reference circle Ø 132<br />
(4xM10)<br />
45°<br />
<strong>Clamping</strong> and<br />
<strong>Braking</strong> <strong>Systems</strong><br />
11
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