Has the HMSB Hema developed a brake rod, which works with a spring energy storage device according to the principle of the proven spring and can therefore be used not only as an operating and parking brake, but also as Notstoppbremse. By the electromagnetic operation requires the compact HMSB no hydraulic or pneumatic connection.
Since only one power connection with 400 V AC rated power must be present and the electronic control is already integrated, the HMSB can be easily mounted or retrofitted.
If no voltage is applied to the brake, a conical bush is pressed axially into a likewise conical bore of the housing by the spring force. As a result, the cross-section is narrowed at the inner diameter of the sleeve, so that it clamps on the center passing round rod with high force (8 to 14 kN). The spring force is amplified by the cone angle of the socket. To open the brake, the HMSB is energized, whereby an integrated strong electromagnet attracts a flat armature, which presses the clamping sleeve against the spring force from the conical seat. After the tightening phase, the power consumption of the brake is less than 15 VA. With 199 x 120 x 152 mm, the brake is very compact and can be used in harsh environments thanks to the IP65 protection class.
In the version as a brake, the cone bushing clamped on the rod is not firmly connected to the housing. Therefore, attached to the housing mass braking force reinforcing, because it leads to a further wedging of the socket (holding force 14 kN). Although this displacement of the sleeve relative to the housing prevents accurate positioning, but this is not necessary when braking.
In contrast, for applications requiring precise positioning without braking action, there is a version for bar clamping (holding force 8 kN). In this case, the cone bush is firmly connected to the housing and thus not easily displaced as in the design as a brake - ideal for precise positioning. The spring presses during clamping on a freely movable hub with inner cone, on which then the magnetic force acts to open.