SU476384A1 - Safety clutch - Google Patents

Description

one

This invention relates to the field of general engineering.

Known safety clutch, containing friction disc spring-loaded coupling halves and actuation device in the form of hinges, placed in the holes of the pressure disc mounted on the master coupling half and carrying the mechanism of signaling. The pressure disk, moving when triggered along the axis, closes the electric signal contact with its face eccentric.

However, the presence of electrical contacts and circuits does not allow the use of a well-known coupling in explosive conditions.

In order to eliminate this drawback, the signaling mechanism of the proposed coupling is made in the form of a pneumatic logic device that, when exposed to it, is moved in the axial direction by a bracket mounted on a flange bushing that carries spring-loaded fingers evenly spaced around the circumference of the pressure disc and tightening balls. devices to made in the end of the driven coupling half of the recesses, the number of which is equal to or a multiple of the number of fingers.

FIG. 1 shows the proposed coupling, cut; in fig. 2 - a type of pp arrow A on

FIG. one; in fig. 3 is a schematic diagram of a pneumatic logic device.

On the leading coupling half 1 on the bearing 2, the coupling half 3 is installed. The leading 4 and the driven 5 friction disks are attached to the bearing 2, respectively. They are slidable through the supporting discs 6 and the pressure plate 7 by means of a spring 8, the force of which is adjusted by the nut 9. At the same time, the coupling half 3 and the pressure disc 7 constantly have a gap. The disk 7 is mounted axially movably with a flange bushing 10 with a bracket 11 and fingers 12 fixed to it, evenly spaced around the circumference and entering into the corresponding holes of the pressure disc 7. They include: springs 13, pressing the bushing 10 to the pressure disc and balls 14: To 1-conic butt grooves of the driven half-coupling 3, the number of which is paiBHO or a multiple of the number of fingers.

The bracket And acts on the tip 15 of the pneumatic logic device. The nozzle-flap element or any contactless ink jet tip can be used as a tip. Its output is fed through a tank 16 with a choke leading to the atmosphere, to one of the inputs of the relay 17, switched on in mode "I. On the other hand, the signal from the tip is fed to the input of the relay 18, which is included in the "NOT. The output of this relay is connected to the second input of the relay 17 through a capacitance 19 with a choke leading to the atmosphere.

The output 20 of the relay 17 leads to the actuator.

The clutch works as follows.

In the absence of slippage, the balls 14 are either in the conical depressions of the half-coupling 3, or on its face surface and, consequently, the flange bushing 10 with the clip G1 is in one of the two extreme positions.

If the clip presses tip 15, then capacitance 19 will be connected to the atmosphere and there will be no signal at output 20. If the bracket does not press the tip 15, then the capacitance 16 will not communicate with the atmosphere and the output signal 20 will not turn off.

Only during 1 Slip time of two, the coupling half, the pressure disk 7 rotates relative to the coupling half 3, and the balls 14, then lifting, then exiting from the conical recesses, through the fingers 12, move the sleeve 10 and the bracket 11 alternately pressing, then lowering tip 15, both tanks 19 and 16 are filled, the relay 17 is activated, and a signal appears at output 20.

After the cessation of slippage, the movement along the axis of the bracket 11 is stopped, and regardless of the condition of the tank 15, one of the tanks 16 or 19 is released through its opening throttle to the atmosphere, the relay 17 returns IB to its original position, and the signal disappears.

Such an implementation of the friktion clutch with a device for signaling actuation provides for periodic axial movement of the disk, and consequently, periodic pressing on the handpiece at the beginning of the operation of the clutch, and the pneumatic logic device constructed in this way provides a signal at the output only when the signal changes periodically at the input.

The use of a pneumatic logic device allows the coupling to operate in explosive environments.

Subject invention

A friction clutch, containing friction disc spring-loaded coupling couplings and a triggering device in the form of balls entering the holes of the pressure disc mounted on the master (coupling half and having an alarm mechanism that is different

5 clutches in explosive conditions, the alarm mechanism is made in the form of a pneumatic logic device, triggered by an axially moving bracket attached to a flange bushing that carries spring-loaded fingers evenly around the circumference, which enter the pressure disc holes and press the balls. 1K devices made on

the end face of the driven half coupling holes, the number of which is equal to or a multiple of the number of fingers.

0 12 13

15

15

/five

- -13Fig 2

20

Fig 2