SU386169A1 - FRICTION PROTECTION COUPLING - Google Patents

Description

one

The invention relates to the field of engineering.

Known friction safety clutches containing a driven half coupling, a leading drum, flexible belts interacting with its inner surface, as well as a mechanism for adjusting the torque limit. However, these couplings have large dimensions and weights.

The specific feature of the described coupling is that the mechanism for adjusting the limiting moment is made in the form of split spring bushings freely installed on the hubs of the coupling halves with the ends bent outwardly connected to the ends of flexible belts and movable forks mounted on one of the coupling half and resting against the folded ends of the spring bushings , changing the pressure of the flexible bands to the drum.

This embodiment of the coupling reduces the size and weight of the coupling.

FIG. 1 shows the coupling in cross section (section along A-A in FIG. 2); in fig. 2 is a section along BB in FIG. I; in fig. 3 is a section along BB in FIG. 2; in fig. 4 is a view along arrow G in FIG. 3; in fig. 5 shows the connection of the tape with the sleeve.

The clutch contains a drum 1, rigidly connected with a leading shaft 2, a driven half coupling 3, rigidly connected with the shaft 4, as well as a mechanism for adjusting the torque limit.

made in the form of split spring bushings 5 with bent ends connected to the ends of flexible tapes 6 with friction linings 7. Forks 8, mounted on the driven shaft and having the possibility of movement using an eccentric 9 relative to the coupling half 3, abut the ends of the bushings 5. plugs 8. A hook 11 protects the coupling from contamination. With stringent requirements on the accuracy of coupling balancing, the number 5 and the belts 6 should be even, and their ends should be arranged in pairs diametrically opposite to each other.

The clutch works as follows.

The ends of the sleeves 5 under the action of elastic forces tend to move apart and press the strips 6 with the pads 7 to the inner surface of the drum 1. The ends of the forks 8, tend

rotate under the action of the torque transmitted by the clutch relative to the drum /, rest against the ends of the sleeves 5 connected to the ends of the belts 6, and they weaken the force of the split spring sleeves pressing

friction pad 7 to the inner surface of the drum.

Thus, negative feedback between the torque transmitted by the clutch and the force applied to

the moment of friction, carried out by forks 8, interacting with the ends of the sleeves 5, and

is that with an increase in the coefficient of friction, the sliding between the working surfaces, and consequently, the moment of friction, increases the force with which the forks 8 abut against the ends of the sleeves 5, thereby more weakened the force that excites the moment of friction. The adjustment of the forks 8 is carried out by turning the eccentrics 9.

The clutch is reversible and allows tilting of the connected shafts.

Subject invention

A friction clutch containing a clutch driven coupling

a drum interacting with its inner surface flexible belts with friction linings, as well as a torque limit adjustment mechanism, characterized in that, in order to reduce overall dimensions and weight with a high accuracy of coupling operation, the torque limit adjustment mechanism is designed as freely mounted on the hubs of coupling halves split spring bushings with outward bent ends connected to the ends of flexible tapes, and movable forks mounted on one of the coupling halves and abutted against the bent out ends of the springs s plugs, changing the pressing force of flexible strips to the drum.

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