SU505833A1 - Friction clutch - Google Patents

Description

one

This invention relates to mechanical engineering and can be used in machine tool industry and other industries.

A known friction clutch is contained, and the driving and driven spring-loaded coupling halves and the reverse coupling mechanism.

An increase in the accuracy of limiting the load in couplings of this type is achieved by introducing feedback between the magnitude of the transmitted coolant, its momentum, and force, as a result of which the moment of friction occurs.

A disadvantage of the known couplings is the complexity of the structures due to the presence of several non-braking w; their helical surfaces.

The purpose of the invention is to create a simple in construction and reliable in operation coupling.

This is achieved by the fact that the leading half-coupling of the proposed coupling is made in the form of a glass with a collar, and the feedback mechanism is in the form of a cylinder with an L-shaped flange installed in the glass, which has a central blind bore with a piston bearing the axial displacement. interacting with the bottom of the glass, while between the end of the piston and the bottom of the cylinder bore is placed the working medium, communicating through a system of radial and longitudinal holes in the cylinder with pockets formed by radial slots s, present on the T-shaped flange of the cylinder and disposed between rotatable radial blades provided on the driven coupling half, the shoulder nozzle is biased to the T-shaped flange, on which a friction lining is mounted.

FIG. 1 shows the proposed coupling, a longitudinal section; in fig. 2 is a section along A-A in FIG. one.

The clutch contains movably mounted on the splines of the drive shaft 1 leading coupling half 2, made in the form of a glass with collar, spring 3 and covering the shank of the cylinder 4 with an L-shaped flange. In its central blind bore, a piston 5 is installed freely along a sliding fit, in which a longitudinal keyway is made for a projecting smooth cylindrical end of the screw 6. It limits the rotational movement of the piston relative to the cylinder 4 and ensures its axial movement. On a cylindrical shank Porshn 5 installed thrust bearing 7 in contact with the free end of the bottom of the glass 2, the collar of which interacts with the friction lining 8, installed

the shank of the cylinder and at the end of its L-shaped flange. In the cylinder 4 there are made through radial holes 9, tightly closed with threaded plugs 10. The cavity is filled with the bottom of the blind bore of cylinder 4 and piston 5 (filled, for example, with a hydraulic layer) with radial holes 9 and holes with microchannels 11 parallel to the axis, connected with working pockets volume formed by the blades 12, made by pa L-shaped flange of the cylinder 4, and radial blades rigidly fixed on the rotor 13 14. The outer cylindrical surfaces of the latter are freely covered by an internal, interrupted l The gears 12, the cylindrical surface of the L-shaped flange of the cylinder 4. The blades 12, in turn, freely enclose the cylindrical part of the driven half coupling half of the rotor 13 rigidly fixed on the driven shaft 15. The blades 12 and the blades 14 of the rotor 13 are the same in height, close volumetric tightly cover 16 so that the blades 12 and 14 have the possibility of relative rotation.

In addition, the thickness of the blades 14 of the rotor 13 is less than the circumferential distance between adjacent blades 12 of cylinder 4.

The clutch works as follows.

At the initial moment between the bearing 7 and the bottom of the leading coupling half 22 there is a gap.

The blades 14 are in the initial position relative to the blades 12, while the volume of working pockets filled with hydroplast is maximum.

Burt stakapa 2 spring 3 is pressed to the friction lining 8 and, respectively, to the end of the L-shaped flange of the cylinder 4.

When transferring the drive from the drive shaft to the driven one, under the action of the moment of resistance from the side of the driven link, the driving half coupling-cup 3 together with the cylinder 4 is rotated at a certain angle relative to the rotor 13. The blades 12 and f4 move closer together and the volume of working pockets will decrease. The hydroplastic displaced from the pockets through the holes 11 and 9 will move into the cavity between the bottom of the hollow bore of the cylinder 4 and the end of the hole 5 that moves to the drive floor of the sleeve-cup 2 (left), and the bearing 7 will be pressed to its bottom.

This instantaneous transitional process will last for as long as

the forces acting on the blades from the side of the compressed hydroplast are not balanced with the moment of friction between the leading coupling half-cup 2 and the friction lining 8. Subsequently, synchronous rotation of both coupling halves takes place.

When overloaded, i.e., the moment of resistance increases above the permissible, the driven coupling coupling-rotor 13 stops and the leading coupling half-bowl 2 with the cylinder 4 tends to rotate together as a whole relative to the driven coupling half-rotor 13, and their blades close together mc Work pockets volume optional

decreases, resulting in the piston 5 moving by a certain additional amount to the left, pressing the leading coupling half-glass, thereby reducing the pressing force between the coupling half and ensuring

precise torque limiting and reliable clutch actuation. At the end of the overload mode of operation, i.e., the reduction of the moment of resistance to a certain value, the coupling halves continue the synchro motion.

Form m u l a and 3 o b e e e u u

Friction clutch,

containing leading and driven spring-loaded coupling couplings and a feedback mechanism, characterized in that, in order to increase the reliability of operation and simplify the design, the drive coupling half is made in the form of a sleeve with a collar, and the feedback mechanism is in the form of an R-mounted cylinder with T -shaped flange having a central blind bore with an axial positioned therein

displacements by bearings carrying a bearing interacting with the bottom of the glass, while between the piston face and the cylinder bore bottom there is an operating medium communicating through a system of radial and longitudinal B1X openings in the cylinder with pockets formed by radial protrusions located on the L-shaped cylinder flange, and radial blades arranged between them with the possibility of rotation, made on the driven coupling half, with the sleeve of the cup pressed against the L-shaped flange, on which the friction gasket is mounted.

fig.}

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