Kci Konecranes International Plc

Ismo Kuivam&auml;ki

Mika Kuusela

A method and an arrangement for adjusting the disc brake of a squirrel cage motor, the squirrel cage motor having a stator, a rotor arranged on a shaft of the motor and having a deflector for deflecting part of the magnetic field of the stator to a stray flux of the magnetic field of the rotor in the direction of the shaft, the motor further having an armature arranged on the shaft, a flexible element arranged between the deflector and the armature for pushing the armature away from the deflector, at least one brake disc supported to a motor frame via at least one slot, at least one trigger gear arranged on the shaft and a shaft bearing. When the motor is turned off, an air gap forms between the deflector and the armature, the size of which is adjusted with at least one adjusting piece movable inside a bearing surface in an inner ring of the bearing in the longitudinal direction of the shaft, so that the movement of the adjusting piece causes a movement of the armature in the longitudinal direction of the shaft so that the size of the air gap changes.

Method and arrangement for adjusting disc brake in squirrel cage motor

The invention relates to a disc brake to be opened by torque, the disc brake being arranged between a drive shaft ( ) and a driven shaft ( ) and comprising a brake wheel ( ) arranged on the driven shaft ( ) non-rotatably in the peripheral direction; a friction surface ( ) arranged to cooperate with the brake wheel ( ); a spring device ( ) arranged to press the brake wheel ( ) axially against the friction surface ( ) and means ( to ) causing, by the action of the torque and torsion of the drive shaft ( ) and a possible counter-torque of the driven shaft ( ), the brake wheel ( ) and the friction surface ( ) to drift axially apart and, accordingly, the braking coupling between them to loosen against the spring force of the spring device ( ), whereby the drive shaft ( ) and the driven shaft ( ) are interconnected in such a way that they may turn a restricted rotational angle with respect to each other and that means for causing said axial displacement and for loosening the braking coupling comprise cam means ( to ) arranged between the brake wheel and the drive shaft.

Disc brake to be opened by torque

A load brake having a load shaft, a flange-like pressure plate fixedly mounted onto the load shaft, and a cogwheel arranged on the load shaft. A tension device produces an axial motion and force in the cogwheel as the wheel rotates with respect to the load shaft, and a ratchet wheel is mounted between the pressure plate and the cogwheel. A pawl prevents the rotation of the ratchet wheel at least in the release direction of the load shaft, and friction surfaces are provided between the pressure plate and the ratchet wheel, and the ratchet wheel and the cogwheel. Rotation that tends towards the release direction of the load shaft and that is faster than the speed of rotation of the cogwheel brings the pressure plate and the cogwheel closer together in the axial direction and presses them against the ratchet wheel. Rotation that occurs in the release direction of the load shaft that is directed at the cogwheel, and that exceeds the braking torque and that is faster than the speed of rotation of the load shaft removes the pressure plate and the cogwheel further apart in the axial direction and thus unlocks the braking connection of the pressure plate, the ratchet wheel and the cogwheel. A preclamping device is provided in connection with one friction pair of the friction pairs formed by the pressure plate and the ratchet wheel, and the ratchet wheel and the cogwheel, which produces an axial preclamping force that presses the elements of the friction pair together.

Growing community of inventors

Vantaa, Finland

Ismo Kuivamäki

Growing community of inventors

Vantaa, Finland

Ismo Kuivam&auml;ki

Ismo Kuivamäki