SU1239434A1 - Friction clutch - Google Patents

Description

2. A clutch according to claim 1, which is designed so that, in order to provide stepped self-regulation of the load capacity, temperature-sensitive drives are located in diameter. The invention relates to mechanical engineering, in particular, to friction clutches with self-regulation of the load capacity.

The purpose of the invention is to improve reliability by providing self-regulation of the torque transmitted by the clutch depending on the change in load moment.

Fig.7 1 shows the coupling, a longitudinal section; in fig. 2 - the same, cross section along the intermediate friction disk.

The clutch consists of a fixed axially leading coupling half 1, made in the form of a disk 2 with a cantilever rim 3, an intermediate friction disk 4 and an axially movable coupling half 5 mounted on the driven shaft 6 on a key 7. At the end of the driven coupling half 5 is installed friction lining 8. In the grooves 9-12 of the intermediate friction disk 4 in diametrically opposite directions there are additional elements 13-16 friction, made in the form of T-shaped segments with cylindrical friction lining 17 - 20, having an outer radius equal to the radius of the inner surface of the rim 3 console.

The friction elements 13-16 are mounted with the possibility of telescopic movement in the radial direction in the deaf grooves 9-12 of the friction disk 4. Each friction element is provided with a heat-sensitive drive, for example, in the form of spatial spirals (springs) 21-24, made of a material with a memory effect. these forms, for example, from an alloy of TN1 (a domestic alloy based on nickel-titanium),

Thermal actuators (spatial spirals) 21-24 are rigidly connected

This is exactly the opposite, and the temperature-sensitive characteristics of each individual pair of diametrically opposed drives are different from each other.

with bottoms 25-28 slots of the intermediate friction disc 4 and with movable elements 13-16 friction, with diametrically placed spirals 21-24 made of a material made of a material with the same temperature-sensitive characteristics, and the characteristics of each pair of spirals 21, 23, 22, 24 are different from each other, e.g., the response temperature (the onset and end temperatures of the martensitic transformation) of the coils 21 and 23 is lower than the response temperature (the martensitic transformation)

 5 spirals 22 and 24.

The clutch works as follows. In the initial state, the clutch is turned off, and the thermal actuators 21 - 24 keep the elements 13 - 16 friction in the original (not fully developed) state. When the coupling is turned on, the half coupling 5 presses the intermediate friction disk 4 to the disk 2 of the leading coupling half 1, after which the transmission of torque takes place, and the centrifugal forces acting on the friction elements 13-16 are compensated for by the elastic forces of the thermal actuators 21-24.

When a torque overload appears on the driven shaft 6, the intermediate friction disk 4 slips against the disk 2 of the driving half coupling 1 and the intermediate friction disk 5 heats up, and with it the thermal actuators 21 - 24. Heats up thermal actuators 21 and 23 push the elements 13. and 15 friction and press the friction linings 17 and 19 to the inner surface of the cantilever rim 3. The coupling transfers a relatively higher torque compared to the initial moment.

With a further increase in the load moment of the driven shaft 6, the temperature of the disk 4 after the CTBrfe of its slippage increases, the thermal actuators 22 and 24 work, and due to the friction linings 18 and 20, the friction surface between the intermediate friction disk 4 and the coupling half 1 increases.

Thus, the clutch speed increases the transmitted torque.

When the loading moment of the driven shaft 6 decreases, as the intermediate friction disk 4 cools, the thermal drives 22 and 24, and then the thermal drives 21 and 23, are compressed, and the torque is transmitted again by between the friction lining 8, the end surface of the intermediate friction disk 4 and the disk 2 of the leading coupling half 1.

To disengage clutch 1 at any stage of operation, the coupling half 5 is retracted from the intermediate clutch disc 4 of the driving half coupling 1

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Editor A. Kozoriz

Compiled by A. Shchennikov

Tehred O. Gortvay Proofreader: 0. Lugov

Order 3377/35 Circulation 880 Subscription VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, E.Uzhgorod, Projecto St., 4

Claims (2)

1. Friction clutch containing two coupling halves, one of which is mounted with the possibility of axial movement, and the other is made with a cantilever rim, and an intermediate friction disk, located between the ends of the coupling halves with the possibility of axial movement and rotation, which means that that, in order to increase reliability by ensuring self-regulation of the load capacity during fluctuations in the load moment, it is equipped with friction elements mounted on an intermediate friction disk made in the form of T-rev of cylindrical segments with a radius equal to the radius of the inner surface of the cantilever rim and heat-sensitive drives in the form of spatial spirals made of a material having the shape memory effect, blind radial grooves are made in the intermediate friction disk, the friction elements are telescopically connected to the intermediate disk and placed in blind grooves. with the possibility of radial movement and installed · with a radial clearance relative to the inner surface of the rim, while the spirals are rigidly connected to the bottoms of the blind grooves and to the segments. ... SU., „1239434 Figure 1 2. Coupling in π. 1, about t l and tea 14 and I with the fact that, in order to provide step-by-step self-regulation of the load capacity, heat-sensitive drives are located diametrically opposite, while the heat-sensitive characteristics of each individual pair of diametrically opposite drives are different from each other.