SU375417A1 - CAM COUPLING - Google Patents

Description

one

The invention relates to the field of mechanical engineering and can be used in devices for connecting and disconnecting shafts under load without slipping with low switching on and off forces independent of the transmitted torque, which is transmitted without changing its value, but can vary in direction.

Cam clutches are known, which have two driven half coupling with end cams, between them a leading coupling half with cams at both ends, as well as a control mechanism.

The proposed coupling differs from the known one in that it is equipped with two axially floating intermediate discs installed between each driven and driving coupling halves and made with the cams on one end, similar to the cams of the driven coupling, having a bevel angle equal to the friction angle and on the other end with cams similar to those of a leading coupling half, having a double-sided bevel with a tilt angle greater than the friction angle, and a height equal to twice the height of the cams of the driven coupling half.

Such an embodiment provides for a reduction in the switching effort of the coupling under load.

FIG. 1 schematically shows the proposed cam clutch; in fig. 2 - coupling with the leading coupling half engaged; in fig. 3 - a general view of the coupling in the drive of the machine. Cam clutch for switching shafts under load contains driven coupling halves and 2, driving coupling half 3, switching and fixing unit 4 and intermediate discs

5 VL 6.

The drive coupling half 5 is made with a splined connection with the drive-shaft 7, the groove for the plug 8 of the switching and fixing unit 4 and the cams A at both ends with double-sided bevels and the angle of inclination of the working surface a, the greater friction angle. The height of the cams A is twice as large as the height of the cams of the driven half coupling.

The driven coupling halves / and 2 are kinematically connected to the output shaft 9, their cams B have an asymmetrical inclination of the working surfaces, i.e., the inclination of one of the working surfaces is normal, and the inclination angle of the other p is equal to the friction angle.

The disks 5 VI 6 are made floating and have cams on their ends similar to cams.

corresponding coupling halves. The switching and fixing unit 4 is made in the form of a lever-hinged system, the spring-loaded hinges of which are coupled with the power devices 10 and 11, for example electromagnets,

while the levers 12 and 13 are connected by joints

with a fixed support, and the levers 14 and 15 are pivotally connected between themselves and the fork 8.

In the grooves of the slave coupling halves and 2 and disks 5 vi 6 there are springs 16 holding them.

The cam coupling can be performed either as a direct action, i.e., to turn the transmitted force on and off from the driving shaft to the driven shaft, or to reverse, i.e., to change the rotation of the driven shaft.

The cam clutch for switching shafts under load operates in the following sequence.

The clutch is not turned on, levers 12-15 are broken, the leading half coupling 3 is in the middle position, the disks 5 and b are pressed by the springs 16 to the coupling half 3, the cams A are in full engagement, the cams B are divorced.

The clutch is turned on for the carriage stroke to the left, the electromagnet 11 is on, the levers 13 and 15 are on the straight line, the plug 8 has moved the coupling half 3 with the disk 5 to the coupling half. When the cams B and the half of the coupling 1 and the disk 5 come into contact, the circumferential force ROCK creates an axial force T moving the disk 5 to the coupling half /, while the cams B engage on the whole length 4. And the cams A remain in engagement on the length

- in the process of transferring rotation from half coupling 5 to half coupling 1. The axial force T creates a fixed support of the lever 13 by means of the levers 13, 15 and the fork 8, thanks to the angle p, it is easy to turn on.

Switching off the clutch to change the direction of movement is carried out by turning off the electromagnet 11, while the spring moves the levers 13 and 15 E to a broken position, the reaction of the fixed support to the axial force T is stopped, and the cams A are moved apart by axial force; the coupling half 3 moves to a middle position along the drive shaft 7, the cams L is disengaged, the transfer of the circumferential force to the cams B is stopped, and the spring 16 moves the disk 5 away from the half coupling; the cams L are engaged at full length / i due to the force of the spring 16.

The clutch is turned on to move the carriage to the right, the operation starts with the switching on of the electromagnet 10 and then goes on like the BULGARIA.

Turning off the clutch to stop moving the carriage to the right begins by turning off the electromagnet 10 and then proceeds like a description.

Subject invention

A cam coupling comprising two driven coupling halves with end cams, located between them a driving coupling and coupling with cams at both ends, as well as a control mechanism, characterized in that, in order to reduce the switching forces of the coupling under load, it is equipped with two intermediate axially floating discs installed between each driven and leading half coupling and made with cams on one end, similar to the cams of the driven half coupling, having a bevel angle equal to the friction angle, and on the other

the end face is the analogous cams of the leading half-coupling, which has a double-sided bevel with a tilt angle greater than the friction angle, and a height equal to twice the height of the cams of the driven half-coupling.

FIG. 2