SU708084A1 - Safety clutch - Google Patents

Description

i

The invention relates to the field of mechanical engineering and can be used in various electromechanical drives, mainly in drives of turning devices for cargoes, when it is necessary to disconnect the drive transmission and turn it off, as well as for commissioning and repair work, when it is necessary to transfer the maximum coolness. drive torque through the transmission without disengaging the clutch.

A known safety clutch with a device for shutting down an electric motor, comprising two coaxial spring-loaded coupling halves with connecting elements on the ends, one of which is mounted axially on the shaft and connected to the limit switch, and the other is fixed from axial movement, mounted freely on the shaft and has friction discs mounted on it. On the shaft, a stop is made interacting with the actuation of the moving half coupling, which limits its axial movement and the complete separation of the coupling half 1.

The known safety coupling comprises a leading coupling half and a driven coupling half movably mounted on the shaft, in the longitudinal openings of which the coupling rolling bodies are located and guiding them through the springs connected to the nut 2 mounted on the driven shaft 2.

Such a coupling is closest to the invention in its technical essence and the effect achieved.

However, in the well-known couplings g: it is impossible to changeover for its operation in hard mode to transmit the maximum torque without shutting it down during commissioning and repair work.

The purpose of the invention is to enhance operational capabilities by providing a changeover for hard mode operation. For this, the coupling is provided with a washer having protrusions and blind grooves at the end face and installed with the possibility of axial movement between the pins and the nut.

In addition, the pins can be installed in the grooves of the clamp and pressed to their bottoms.

The pins may be pressed against the face surfaces of the protrusions of the washer.

FIG. shows the clutch in longitudinal section, (the clutch is configured to operate in a safety mode), FIG. 2 - the same, (the clutch is configured to work in hard mode).

The safety clutch contains a leading coupling half 1, mounted on the gearbox shaft, driven movable half coupling 2, mounted on sleeve 3 by means of a tongue 4 to move along sleeve 3, springs 5 and pins 6 located in the longitudinal holes 7 of the driven half coupling 2, a washer 8 with grooves 9, a nut 10 screwed on the sleeve 3 and restricting the movement of the driven coupling half 2 to the right, the retaining ring 11 limiting the movement of the coupling half to the left. The balls 12 are connecting elements between the leading half coupling 1 and the movable driven half coupling 2. The safety coupling also has a housing 13 with a flange 14, compensating the pin 15 with a shim 16. The safety coupling is installed in the power transmission between the gearboxes 17 and 18.

Safety clutch works as follows.

In the event of an increased torque between the leading gidolfing 1 and the movable driven half coupling 2, an increased axial force occurs. This force through the balls 12 and the fingers 15 presses the driven coupling half. The latter compresses the springs 5, and the balls 12 emerge from the hollows of the half-coupling 1. The leading coupling half 1 and the moving driven half coupling half open. The coupling half 1 continues to rotate, and the coupling half coupling 2 stands still. During the movement of the driven half coupling 2 to the right, the flange 14 acts on the limit switch.

During adjustment and repair work, it is necessary to transfer the maximum torque, for which the safety clutch is re-adjusted for operation in the hard mode. To do this, the clamp 8 is turned, releasing the nut 10 so that the pins BY1PLI from the slots 9 and the end 19 of the projections 20 hit the washers 8, and then tighten the nut 10, adjusting the spring 5 until the turns come into contact. In this position, with increasing torque, there is no possibility of moving the driven coupling half 2 to the right, i.e., opening the safety coupling. The connection becomes rigid and it is possible to transmit the maximum torque without opening the clutch.

The proposed design of the safety clutch provides the ability to changeover to work in safety or rigid modes, increases the service life of the clutch by turning off the power drive.

Claims (3)

1. A safety coupling containing a leading coupling half and a driven coupling half movably mounted on the shaft, in the longitudinal openings of which the coupling rolling bodies are placed and pressing pins connected with the nut mounted on the driven shaft, characterized in that expanding operational capabilities by providing retooling for hard mode operation, it is equipped with a washer having protrusions and blind grooves on the end face and installed with the possibility of axial movement between the pins and the nut. J 2. Safety clutch according to claim 1, characterized in that the pins are installed in the slots of the washer and pressed against their bottoms. 3. A safety coupling according to claim 1, characterized in that the pins are pressed against the end surfaces of the protrusions of the washer. Information sources, taken into account in the examination 1. USSR author's certificate number 513187, cl. F 16 D 43/20, 1974. 2. USSR author's certificate 5 No. 343089, cl. F 16 D 7/06, 1970 (prototype).