SU452701A1 - Safety coupling - Google Patents

Description

one

Isoooretation refers to general engineering and can be used to disconnect the operating element of the device from the drive during overloads.

A known safety coupling comprising two half-couplings connected by spring-loaded crank pins with cam bushings rigidly attached thereto, cooperating with the same bushings mounted on a movable disk.

A disadvantage of the known coupling is that when overloaded, the pin of the crank pin, turning around its axis, slides along the slot of the driven coupling half, not exiting it, the coupling half does not open, and the working link of the device cannot mechanically disconnect from the drive. To stop the clutch completely, it is necessary to additionally install electrical contacts to disconnect the drive of the drive shaft.

In order to increase the reliability of the coupling due to the complete opening of the coupling halves, it is equipped with an inertial disk mounted on the driven coupling half, having radial slots and matching surfaces on one side, formed in an Archimede spiral and interacting with the crank fingers in the driven coupling half, when operated, and grooves

for them are made open and located the D leading half coupling.

FIG. 1 depicts the proposed clutch, communities view; in fig. 2 is a section along A-A in FIG. 1 (the dotted line shows the position of the parts at the time of the coupling operation); in fig. 3 is a view along arrow B in FIG. one; in fig. 4 shows a section along BB in FIG. one.

The coupling consists of a master 1 and a slave 2 half couplings fixedly mounted on the respective shafts. In the holes of the driven coupling half 2, crank pins 3 are freely mounted, the pins 4 of which are inserted into the radial grooves 5 of the driving half coupling 1. The fingers 6 are fixedly mounted bushings 6 and the gear sleeves 7 connected by the ends of the spring 8 mounted on the finger 3 are freely mounted. the gear bushing 7 adjusts the tension force of the spring 8. All the bushings 7 are connected with a gear wheel 9, which is freely put on the driven coupling half 2 and fixed with the help of the pawl 10 pivoted on the coupling half 2 and pressed by the spring 11 to the inner surface gear 9 having ratchet cutting. Thus, as one of the gear sleeves rotates, the tension force of all the springs is simultaneously controlled. On the driven half coupling 2 there is installed an inertial disk 12 rotating freely on a ball bearing, having radial cuts and mating surfaces 13 that mate with them on one side, made in an Archimedes spiral that, when the coupling is actuated, come into contact with the pins 4 of the crank pins 3.

The clutch works as follows. Under normal conditions, when the torque transmitted by the clutch does not exceed the calculated value, the rotation from the coupling half 1 through the trunnion 4 of the crank pins 3 and the spring 8 is transmitted to the coupling half 2 and the shaft rigidly connected to it. The magnitude of the torque is controlled by rotating the gear sleeve 7, which changes the tension of the spring 8.

In the event of overloads, when the torque increases sharply, the pins 4 of the crank pins 3 deviate, slide along the radial grooves 5 of the leading coupling half 1 and, turning around their axis, exit from these grooves. The half coupling 2 at this moment stops abruptly, and the inertial disk 12 due to inertia forces continues to rotate, the lifting surface 13 fits under the trunnions 4 and, slightly wedging them, holds them in the upper position. The clutch is fully opened and the coupling half 1 rotates freely, without hitting the pin 4.

After turning off the device and eliminating the cause of the overload, the trunnion 4 is reintroduced into the radial grooves 5 of the half coupling 1 by turning the inertia disk 12 by the holes 14 in the opposite direction. To hold the crank pins 3 in the working position on the driven coupling half 2, limiters 15 are installed.

Subject invention

A safety coupling containing the leading and driven coupling halves, connected by spring-loaded crank pins mounted on one of the coupling halves and entering into the radial grooves of the other coupling half, is characterized in that, in order to increase the reliability of the coupling operation by fully opening the coupling halves, it is equipped with an inertial disk mounted on the driven half coupling, having radial slots and mating with them on one side shaped surfaces, made in a spiral of Archimedes and interacting when operated with cree oshipnymi fingers driven coupling half, wherein the grooves are made to open and located in the leading coupling half.

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