Examples of installation & Application
Basic Design and Operation Structure Examples of installation & Application
Although armatures, rotors, and brake faces are machined or even lapped as flat as possible at manufacture, peaks and valleys remain on the surfaces. When a new clutch or brake engages, the contact area is initially confined to the peaks on the mating surfaces. This smaller contact area means torque can be as much as 50%~70% less than the unit’s static torque rating.
To get the full torque, users need to burnish mating surfaces. Burnishing cycles the unit, letting those initial peaks wear down so there is more surface contact between the mating faces. These cycles depending on the amount of torque required, should be lower in inertia, speed, or both, than the end application. Normal operations wear down contact surfaces as burnishing does. Every time a clutch or brake engages during rotation, a certain amount of energy is transferred as heat, please also note that the heat can not be higher than 80℃.
Applications and torque ranges
This unit is suitable for use in transporters, motorized wheelchairs, golf carts, airport luggage carriers, electric transport and electric tow vehicles.
Standard static friction and torque
No handle: 10Nm~110Nm
With handle: 20Nm~110Nm
Other specifications available on request.
Safety brake instructions for installation
The back face of the motor should be perpendicular to the ground with 0.05mm so that the brake will not rub against the upper pressure plate when the lining wears then. Such abrasion can lead to overheating which cause the motor to lock.
When tightening the locknuts on the brake, avoid contact the brake plate if using an electric screwdriver to avoid scratching the armature of the coil and affecting the gap in the brake. If the gap is no sufficient the lining will rub against the armature (this is particularly a problem for models without handles.)
Before mounting the brake, attach a 24V lead to ensure that the lining moves freely. Lightly insert the brake into the back cover of the motor, lining up the hexagonal shaft sleeve, aligning the screw hold and tightening a screw in place without letting the hexagonal shaft sleeve come too close to the hexagonal lining. Do not force it or tap with a wooden mallet. This could cause the lining to warp and rub against the break when it turns, making loud noises and casing the brake to jam.
The center shaft of the motor should be ground to 8mm +/-0.08. When fixing the hexagonal shaft sleeve in place, insert the cotter pin so that it is within 0.5mm below or flush with the surface of the hexagonal shaft sleeve it must not protrude above the surface or it will interfere wit the installation of the brake. Forcing it or tapping with a hammer may push the lining out of shape.
The lock screws for the brake fit into the back over of the motor. The PCD and four holes should be finished to within 0.1 mm so that the brake pressure plate will not be distorted when the lock screws are tightened. A small amount of glue may be applied to the hole, taking care that none runs onto the motor cover. Do not apply the glue directly to the screws.
Ensure that the hexagonal shaft sleeve is perpendicular to the coil armature during installation to avoid rubbing during operation.
During installation an additional hole may be drilled into the back cover of the motor to facilitate centering the brake center and fixing the brake in place.
Instructions for assembly
Ensure that the lining is centered during installation of the brake.
Do not force or hammer the brake into place, to avoid pushing the lining out of shape.
If the lining is out of position connect a power lead and let it turn briefly before aligning it again.
Fit the motor assembly face and the shaft so they are lined up to within 0.05mm to avoid jamming.
Safety brake L-0.4KG Instructions for testing
Test the brake before installing it by attaching a 24V lead and listening for sounds that might indicate jamming or loose parts. Run the motor at voltages between 0 and 24V and listen for sounds of rubbing against the lining.