A friction clutch

 

(57) Abstract:

Usage: in the field of mechanical engineering for transmitting rotation between the coaxial shafts and other machine parts. The inventive coupling halves 1 and 2 with conical friction surfaces cover one another. Half coupling 2 is spring-loaded relative to the nut installed on the shaft with the possibility of adjusting movement. Between the coupling equipped with a conical ring 4, serially connected with the hub by means of pins 9. This embodiment allows to reduce the dimensions of the coupling without changing the transmitted torque. 2 Il.

The invention relates to the field of engineering, is designed for the transmission of rotation, i.e., for coupling a device messages rotation between shafts or other coaxially spaced links of the mechanism.

Known cone coupling with two coupling with conical surfaces, the spring force-closure, keyed connection shaft movable in the axial direction of the shaft-coupling, the nut and locknut regulation of the force of the spring /1/.

When such a coupling is created friction torque, depending on the radius of the clutch, and consequently the necessary increase The such structures are widely used in hand-held tools. Obviously, hand tools must be small in weight and dimensions, which is the object of the invention.

The problem is solved in that known device, containing a fixed coupling, flexible couplings with conical friction surfaces, movable coupling is connected with the shaft in the circumferential direction by means of torque transmission, and control means preload moveable coupling to still equipped with several conical rings with end grooves concentrically arranged relative to each other in the annular gap between the conical friction surfaces of the coupling, as well as by pins, one of which is installed in covering the coupling and positioned in grooves odd conical rings, starting from the axis of the shaft in the radial direction, and other installed within the coupling and positioned in grooves odd conical rings, starting from the axis of the shaft in the same direction, thus the face grooves made on a smaller diameter odd conical ruts and large diameter of the conical even rings.

In Fig. 1 shows a General view of the friction cone clutch;Fig. 2 is a diagram of the forces on the conical surfaces of the coupling.

A friction clutch operates as follows. Rotation between the coupling halves 1 and 2 is transmitted through pins 8 and 9 through the grooves in the conical ring 4 friction forces on the conical surfaces of these half-couplings and rings arising from the force of the spring 5, the adjustable movement of the threaded shaft 3 nut 6 is fixed by the nut 7. When this odd ring 4, starting from the stationary coupling 1, rotate in one piece with the pin 8 and a movable coupling half 2, and the even-numbered ring 4 in one piece with pins 9 and a fixed coupling half 1 in the open condition of the coupling 1 and 2 and the rings 4. The circuit of the coupling halves 1 and 2 with a tapered rings 4 is performed by the spring 5. To turn off the rotation is groove coupling 2, which interacts with a fork control. Moreover, with the movement of the movable coupling 2 to the right in Fig. 1 breaking occurs conical ring 4 C is) to the sine of the angle forming cones to the axis of the shaft 3. Therefore, when the angle of friction of the order of 6oaccepted limit for the implementation of the disconnection, the result is a five-fold reduction in wire diameter of the spring 5. With the introduction of several conical ring 4, which is the force decreases in proportion to the number of cooperating conical surfaces of the rings 4 and the coupling and 2 in connection with the placement of the pins 8 and 9.

This is substantiated reduced radial dimensions of the coupling 1 and 2, as well as the dimensions of the spring 5.

Such multi-layer frictional connection of the rings increases the friction force of the clutch in a multi-disc clutch, reduces the radial dimensions of the coupling structure, and also allows you to reduce the spring force of the force-closure, i.e. makes it possible to reduce also the dimensions of the spring and consequently the dimensions of the coupling.

A friction clutch, containing made with conical friction surfaces fixed in the axial direction covering the coupling half and moving in the direction of the axis of the shaft covered by the coupling associated with the shaft in the circumferential direction by means of the transmission of torque, and adjustable means preload moveable coupling to a stationary, characterized in that it has several rings from the ends of the pension surfaces of the covering, and covered the coupling, and pins, some of which are installed in covering the coupling and positioned in grooves odd conical rings, starting from the axis of the shaft in the radial direction, and the other set within the coupling and positioned in the slots even conical rings, starting from the axis of the shaft in the same direction, thus the face grooves made on a smaller diameter odd conical rings and the large diameter of the conical even rings.

 

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