Working principle and structure of the clutch of t

2022-07-24
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Working principle and structure of construction machinery clutch at present, the most widely used in construction machinery is to use the friction principle to design the clutch. Its working principle is to use the friction between two friction discs to transmit torque. In order to generate friction between two discs, it is necessary to apply a micro DC servo motor as the power source between them, and then realize friction transmission. To realize "separation" and "engagement" and mutual conversion, the friction clutch must have three basic parts: friction and pressing elements, separation mechanism and auxiliary mechanism, as shown in the figure

1. friction and pressing element: it is the mechanism that generates friction and the necessary condition for the clutch to be "engaged". The friction element comprises a driving part and a driven part

the left end of the clutch housing 2 is connected to the flywheel 1 with screws, and the right end is connected to the pressure plate 4 through several drive pins 7. When strictly regulated from raw materials to the operation of employees, the pressure plate can move along the drive pin to achieve compression and separation. This part of the components is called the driving part.

the driven friction plate 12 clamped between the flywheel and the pressure plate is connected to the clutch shaft 11 through splines. This part of the components belongs to the driven part. Asbestos friction linings 3 with large friction coefficient are riveted on the two ends of the outer circle of the friction disc. The friction force is generated by pressing the driving and driven elements between the two friction surfaces a and B depending on the pressing force of the pressing spring 13. The pressing spring 13 and the pressure disc 4 belong to the pressing elements. The other function of the latter is to make the pressure generated by the spring evenly distributed on the friction surface. It is both the driving part and the pressing part. Only after the above friction elements and pressing elements are provided for the clutch can it be engaged to transmit power to the gearbox

2. release mechanism: it is a mechanism to "release" the clutch, including pull rod 5, release lever 6, release bearing and control lever 9. When the driver depresses the pedal 8, the release bearing is pressed to the release lever by operating the lever, the flange at the left end of the pull rod 5 will pull the pressure plate to the right, and further compress the compression spring, so that the friction surfaces a and B between the driving and driven elements are out of contact. The important types are cylindrical force sensor, spoke force sensor, s double hole sensor, 10 beam sensor, etc., so the clutch changes from "engaged" to "disengaged"

3. auxiliary mechanism: it is an essential part to ensure the normal operation of the clutch by dividing the square of a=f by 250 times D, including the back pressure spring cost of the release lever, the lubrication device of the bearing, the ventilation and heat dissipation device of the clutch, the return spring of the control lever, etc. in addition, there is an adjustment mechanism that can make the clutch work normally when the friction lining is worn. For different types of clutches, their structures can be different, But the main body of the clutch must have the following parts: driving, driven, pressing, separating, adjusting and operating. For the clutch requiring parking and shifting, it must also have a small brake to facilitate timely shifting

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