ZH-1 brake caliper
The braking force is generated by a set of 2 springs located in the caliper cylinder. If there is no hydraulic oil pressure, the springs apply axial pressure to the brake disc from the brake shoes with a bonded friction lining. The brake is released by compressing these springs by means of oil pressure acting on the piston. The amount of braking force is determined by the deflection of the springs. The braking force, which decreases as the friction linings wear out, is adjusted manually by the operator. The caliper is equipped with a puller that allows manual release of the caliper in the absence of hydraulic oil supply. It can also be equipped with brake release sensors and sensors indicating the need for brake force adjustment due to friction lining wear. The caliper is equipped with clamps which stabilise the position of the brake shoes during arm movement and prevent the linings from rubbing against the rotating brake disc.
The ZH-1 caliper is designed to cooperate with a hydraulic aggregate with a minimum working pressure of 150 bar and maximum working pressure of 190 bar.
ZH-3 brake caliper
The ZH-3 brake caliper is a ZH-1 caliper additionally equipped with an automatic hydraulic brake lining wear compensation system, so that it does not need to be adjusted manually due to lining wear. Instead, the adjustment is done automatically. It is necessary to use a hydraulic aggregate suitable for this system.
ZH-2 and ZH-2M brake calipers
The braking force is generated by a set of disc springs located in the caliper cylinder. If there is no hydraulic oil pressure, the springs apply axial pressure to the brake disc from the brake shoes with a bonded friction lining. The brake is released by compressing these springs by means of oil pressure acting on the piston cylinder. The caliper can be equipped with brake release sensors, sensors indicating the need for adjustment due to brake lining wear and sensors indicating the need for shoe replacement. In the standard ZH-2 version the caliper consists of two cylinders and a base fixed to the horizontal plane. When pressurised oil is fed into each of the two cylinders, the pistons are moved in them and both brake shoes are moved away from the brake disc. In the ZH-2M version the caliper consisting of one cylinder and a base is fixed to the vertical plane with two screws. The caliper body is slidably mounted on two shaft ends and when pressurized oil is fed, one (movable) shoe is moved and springs move the whole body on the shaft ends so that a gap is created between both shoes and the brake disc.
ZHA active caliper
The braking force is generated by hydraulic oil fed into the cylinders which are a part of the calipers. Its pressure value can be used to vary the amount of the braking force. When the supply oil pressure decreases, the shoes spread apart under the influence of the return springs built into them, allowing the disc to rotate freely. The calipers may be equipped with release and brake lining wear sensors.
