The operation process of the clutch can be divided into the separation process and the engagement process. In the separation process, the clutch pedal is stepped on, and the free gap of the clutch is eliminated in the free stroke, and then the separation gap occurs in the working stroke, and the clutch is separated.
In the process of engagement, gradually loosen the clutch pedal, the pressure plate moves forward under the effect of the tension spring, firstly eliminate the separation gap, and effect sufficient pressure on the pressure plate, driven plate and flywheel operating surface; Afterwards, the separation bearing moves backward under the effect of the reset spring, a free gap occurs, and the clutch is engaged.
During the operation of the clutch, the driven disc will become thinner due to wear and tear, which will reduce the free gap, which will eventually affect the normal engagement of the clutch, so the clutch needs to be adjusted after a period of operation. The intention of the clutch adjustment is to ensure a suitable free gap, and the position and method of the clutch adjustment depends on the detailed crawler truck model.
The pressure plate is an automatic part of the clutch, which always rotates with the flywheel. Generally, it can be driven by a boss, key or pin to make it rotate together with the flywheel. At the same time, the pressure plate can move backward relative to the flywheel to separate the clutch. The driven disk is mainly composed of the driven disk body, the conflict sheet and the driven disk hub.
In the process of clutch separation to engagement, the conflicting disc, the flywheel and the pressure plate will conflict, and a lot of heat will be generated. These heat needs to be dissipated in time to prevent the conflicting plates from being damaged due to excessive temperature. Therefore, windows are provided on the clutch cover, and some are also equipped with air guide plates to enhance internal ventilation and heat dissipation.
The most common compression structures of conflict clutches are spiral tension springs and diaphragm tension springs. Diaphragm tension spring clutches have two construction methods: push type and pull type. The helical tension spring clutch is divided into a peripheral spring and a center tension spring according to the way the tension spring presses on the pressure plate.
The operation organization of the clutch is divided into mechanical operation organization and hydraulic operation organization. In order to reduce the required clutch pedal force without increasing the pedal stroke due to the excessive transmission ratio of the transmission equipment, the clutch pedal is adopted on the crawler truck. Power-assisted equipment. In addition, there is also a pneumatic clutch operation organization that uses the engine's air compressor as the primary operating power, and the driver's body is used as an auxiliary or backup operating power, which is mostly related to the pneumatic brake system of the crawler truck or other pneumatics. The equipment shares a set of compressed air source.