SU1594324A1 - Clutch - Google Patents

Abstract

The invention relates to mechanical engineering and can be used to transmit torque in machines and mechanisms. The purpose of the invention is to increase durability. The clutch contains a leading half coupling in the form of a housing 1 with radial chambers, mounted on a drive shaft 3, and a driven half coupling in the form of a shaft 4 with eccentrics 6. The chambers contain centrifugal weights 9, connected in 10 with eccentrics 6. The eccentrics are in the form of a movable sleeve rigidly connected to a disk 7 fitted with cams 8. A disk 12 with cams is mounted on the shaft 4 and interacting with the cams 8 side surfaces and mounted relative to the cams 8 with a clearance in the circumferential direction. When the shaft 3 rotates at a speed greater than the speed of the shaft 4, the moment from the side of the loads 9 to the eccentrics 6 changes sign. With its direction opposite to the rotation of the shaft 4, the cams come out of contact with each other and the moment on the shaft 4 is not transmitted. The use of cam torque for one-sided transmission reduces the contact voltages and ensures the independence of the coupling performance from the wear of the contacting surfaces. 3 il.

Description

Cams 8. A disk 12c is fixed on the shaft 4 by cams which interact with the cams 8 side surfaces and are set relative to the cams 8 with a clearance in the circumferential direction. When the shaft 3 rotates at a speed greater than the speed of the shaft 4, the moment from the loads 9 to the eccentrics 6 changes sign. When it is directed opposite to the rotation of the shaft 4, the cams come out of contact with each other and the moment on the shaft 4 is not transmitted. The use of cam torque for one-sided transmission reduces the contact voltages and ensures the independence of the coupling performance from the wear of the contacting surfaces. 3 il.

; The invention relates to the field of engineering and can be used 4l transmission of torque in machines and mechanisms.

The purpose of the invention is to increase the long-term effectiveness of the coupling.

FIG. 1 shows a coupling, a longitudinal section; in fig. 2 shows section A-A in FIG. one; in fig. 3 shows a section BB in FIG. one.

The clutch contains a leading coupling half in a housing 1 with radial chambers 2, fixed 1;) on the drive shaft 3, and a half-coupling in the form of a shaft 4, on which eccentrics 6 are movably mounted on bearings 5 in the form of a sleeve rigidly connected to a disk 7, equipped with cams 8. Centrifugal weights 9 are movably placed inside chambers 2, which by means of levers 10 are connected to eccentrics 6. Levers 10 are mounted on bearings 11. A disk 12 with cams 13 which are engaged with cams 8 is rigidly fixed on shaft 4 backlash. Cams 13 Fitted with shock absorbers 14 of resilient material. The shaft 4 is mounted on bearings 15.

The clutch works as follows.

From the moment the master coupling half is turned on. putting the driven mechanism or machine into operation consistently undergoes three modes of operation: the first is the idle when the leading coupling half rotates and the knowledge is in a static position; the second one is transitional when the master and the driven half couplings rotate at different speeds lower than the working one; the third is working, when the rotational speeds of both half couplings are equal to each other.

In idle mode, the drive shaft 3 rotates the housing 1 with the chambers 2, in which centrifugal weights 9 are placed. They rotate with the levers 10 on the bearings 11 around the eccentrics 6. In this mode, the shaft 4 remains stationary.

In a transient mode, the magnitude of the centrifugal force is insufficient for the constant transmission of torque to the shaft 4.

The latter receives a pulse effect. At those moments when the torque in the direction coincides with the direction of rotation of the shaft 4, driven by the coupling half spins the shaft 4. When overtaking the driven shaft of the driven by an amount greater than 180 °, the moment from the weights 9, acting on the eccentric b, changes sign. The latter begin to rotate in the opposite direction until

a position in which the axis of their outer surface coincides with the line connecting the axis of the shaft 4 and the center of mass of the weights 9. In this case, the cams 8 come out of contact with the cams 13 (shock absorbers 14). Further

the rotation of the drive shaft is accompanied by the joint rotation of the eccentrics 6 with the loads 9 until the cams 8 are in contact with the cams 13 (shock absorbers 14), after which it is transmitted to the driven shaft

moment. If during further overtaking by the drive shaft of the driven moment from the loads 9 reaches a value equal to the moment of resistance on the driven shaft, the latter begins to rotate synchronously with

lead comes the third mode - working.

Use as a one-way device moment transfer. And discs with cams, interacting side

surfaces, will increase the durability of the coupling due to the smaller contact stresses in the device elements and the independence of the operability of the coupling from the wear of the contact surfaces.

Claims (1)

Claims of the invention: A coupling comprising a drive half coupling with centrifugal weights, a driven shaft and a unilateral moment transmission device connecting the driven shaft with centrifugal weights, characterized in that, in order to increase durability, the unilateral moment transmission device is made in the form of an eccentric sleeve and coaxially mounted discs with cams on mutually reversed ends, located one relative to another with a gap in the circumferential direction and with the possibility the interaction of the side surfaces of the eccentric sleeve is rigidly connected ; FIG. one end with one of the disks, and the other with centrifugal weights. 5-6 Fig.d