SU1530861A1 - Torque-limiting clutch - Google Patents

Abstract

The invention relates to mechanical engineering, in particular to a mechanized tool for transmitting rotation with a certain torque. The purpose of the invention is to increase reliability by eliminating the effect of a spring on rolling bodies. Half coupling (П) 4, 6 are placed in housing 1 and connected by rollers 5 and balls (Ш) 7. Ш 7 are installed in П 6 and pressed to the rollers by an elastic link with pressure disk (LP) 9. Throttle hole 14 is made in housing 1. Pistons 11, 12 form a cavity 13. Piston 11 can move along an axis. Its position is fixed in the housing 1, which determines the degree of compression of the spring 8. The piston 12 is rigidly connected to the LP 9. When the coupling 7 is activated, the LP 9 is depressed. After moving, LD 9 retracts the piston 11, opening port 14. the cavity 13 is compressed air, with which the piston 11 and the spring 8 are reliably fixed in the position reserved for 7. 1 il.

Description

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The invention relates to mechanical engineering, in particular to the mechanized HrfcTpyMeHTy for transmitting rotation at a certain torque.

The purpose of the invention is to increase reliability by eliminating the effect of a spring on rolling bodies.

The drawing shows a graphical image of the clutch, a general view.

The torque limiting clutch contains a split housing 1, housed in non-bearings 2 and 3, in which a leading coupling half 4 is installed with rollers 5 located in the grooves and driven by coupling half 6 containing balls 7 mounted in the holes of the half coupling 6 with the possibility of axial displacement.

The balls 7 of the driven half coupling 6 are clamped to the rollers 5 of the leading coupling half 4 by means of an elastic link, made in the form of a corrugated spring 8 made of polyurethane, and a pressure disk 9 installed between the balls 7 and the corrugated spring 8. The pressure disk 9 through the lock ring 10 is rigid Associated with a means of adjusting the compression of the spring 8 in the form of a piston 11. The piston 11 forms with the additional piston 12 a working cavity 13, having the ability to communicate with the throttle hole 14 connected to the pressure line. Moreover, the working cavity 13 and the hole 14 are separated in the axial direction by an amount equal to half the height of the contacting surface of the coupling half, and sealed relative to each other by sealing rings 15-17. The piston 12 is made in the form of a disk 18 with pins 19, having the ability to move along the slots 20 of the housing 1 , and two nuts - adjusting 21 and persistent 22.

The coupling is adjusted to the required moment before it starts work by loosening the stop nut 22 and moving the disc 18 in the axial direction by rotating the nut 21, which, by its end surface on the pins 19 rigidly fixed in the disk 18, causes them to move along the slots 20 of the housing 1 and move the disc 18. After adjusting the coupling to the limiting moment, both nuts 21 and 22 are locked against the pins 19, thereby excluding their axial movement, and.

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therefore, the axial movement of the disk 18 relative to the housing 1 during operation of the coupling.

The clutch works as follows.

When the driving half coupling 4 rotates, the torque through the balls 7 interacting with the rollers 5 of the leading coupling half 4 is transmitted to the driven coupling half 6. When the specified torque limit is reached on the clutch, the forces of interaction between the rollers 5 and the balls 7 move the last in the driven holes the coupling half 6 in the axial direction, which causes movement of the pressure disc 9 and rigidly connected with. the piston 11 and the deformation of the pre-loaded spring 8. As a result of the movement, the working cavity 13 communicates with the opening 14 of the housing 1, which is connected to a pressure pipe (not shown) through the air distributor. Compressed air fills the working cavity 13 and, acting on the pistol 11, moves the latter to the extreme right position. In this case, the spring 8 is further deformed and the pressure disk 9 is retracted from the balls 7. The last holes move away from the rollers 5 through the holes in the driven coupling half 6, the coupling half 4 and 6 are fully released and held in the release position. After that, the leading semi-coupling 4 continues to rotate, without being in contact with the rollers 5 with the balls 7 of the driven half-coupling 6,. The activation of the safety clutch is performed as follows.

Air distributor (not shown) switch. Compressed air from the working cavity 13 through the opening 14 is removed into the atmosphere, and the pressure disk 9, moving under the action of the elastic force of the compressed corrugated sleeve 8, returns to the initial position the balls 7 of the driven coupling half 6 and enters them into engagement with the rollers 5. Air distributor switch to the initial position and the cycle of operation of the coupling is repeated.

Claims (1)

Thus, the piston system, when the clutch is actuated, provides an unstressed slip of the coupling halves, eliminating the effect of the elastic link. Invention Formula The torque limiting clutch, containing coaxially located driving and driven flange coupling halves, rolling coupling bodies placed in the driving coupling half and in the holes of the driven coupling coupling, pressed to the driving coupling half by an elastic link with a pressure disc, as well as the means for adjusting the spring of the elastic link, which is equipped with a pressure link with a pressure link, which is equipped with a pressure link of the spring link of the elastic link. that, in order to increase reliability by eliminating the effect of a spring on rolling bodies when couplings operate, it is provided with a housing freely installed concentric to the coupling halves — with a radial throttle A bore hole for connecting to a pressure source and a piston, means of adjustment are made in the form of an additional piston connected to the housing with the possibility of adjusting axial movement, the main piston is rigidly connected to the pressure disk with the possibility of blocking the throttle hole, and the additional piston is installed axially to the main piston with a gap relative to it.