SU1350393A1 - Elastic coupling - Google Patents

Abstract

The invention relates to mechanical engineering and is intended to connect shafts mounted with a deviation from alignment. The aim of the invention is to increase reliability by stabilizing torsional rigidity during operation. The clutch contains coupling halves 1 and 2 with a pair of cams 3 and an intermediate elastic element 4 in the form of a rubber sprocket. The cams 3 are made in the form of staples from a material with a shape memory effect. When the rotation of the coupling half 1 and 2 is transmitted, the element (asterisk) 4 heats up, softens and reduces the torsional rigidity of the coupling in contact with the element (asterisk) 4, the cams 3 warm up, gradually changing their shape to the maximum width. At the same time, the rays of the element (asterisk) 4 are compressed to compensate for the decrease in stiffness. Thus, a constant torsional stiffness is maintained in the clutch. 4 il. i (l fie.1

Description

one

The invention relates to mechanical engineering and can be used to connect shafts in mechanisms transmitting rotation, for example, in gears of manipulators.

The purpose of the invention is to increase reliability by stabilizing the torsional rigidity of the coupling during operation,

Figure 1 shows the elastic coupling before operation, a General view; Figure 2 is the same, after the cams with shape memory have been activated; on

3

FIG. 3 - half-coupling with cams, axon-15 with sprocket sprocket 4 cams 3 per meter; figure 4 - elastic elastic intermediate element in the form of an asterisk.

Elastic half coupling contains two

As a result, the heat transfer is also increased, and when heated from 20 to 70

smoothly change their shape from the initial (figure 1) to the shape with the maximum

coupling halves 1 and 2 with cams, an intermediate sprocket 3, in the form of an asterisk, for example, of rubber, cams 3, are made of a material that has the property of reversible shape memory, for example, nickel alloy and 25 titanium (Ni 55%, Ti else).

Billet cams 3 cut out of a sheet with a thickness of 1-3 mm, the specified alloy, profiled by bending into a bracket (Fig.1 and 3) and welded to 30 coupling halves 1 and 2. Then the cams 3 are shaped (Fig.2), at which they have a maximum width. Further, the high-temperature

with cams 3 and elastic - 20 thick (fig. 2). With this cams

3 additionally compress the rays of the asterisk 4, compensating for this decrease in their rigidity as a result of heating. Therefore, the torsional stiffness of the coupling remains unchanged.

When the cams 3 and the sprockets 4 cool, the cams 3 return to their original shape with a minimum thickness (Fig. 1). Additional deformation of the sprocket is removed.

The torsional stiffness of the coupling is stabilized when the external element 4 is heated externally, for example, when the temperature rises around 500 ° C, followed by a cooling medium.

The investigator possesses post bone properties of elastic

by air. When cooled to 1 o

Consequently, the elastic coupling has a constant torsional stiffness regardless of the change in the properties of the elastic element; the 20 ° C jaws assume an initially predetermined shape (figure 1 or 3), at which the jaw width is minimal. Further, for training reversible memory 40 of elastomeric material (in the form carried out about 100 cycles, for example, of rubber) as a result of

internal heating, and with increasing ambient temperature

As a result, it turns out that at a temp. It allows the use of an elastic 20 ° C.

changing cam temperatures from 20 to.

The temperature below C is a minimum width (Fig. 1), at a temperature of 70 C - maximum width (Fig. 2), and in the range of 20-70 ° C, the width of the cams gradually changes from a minimum to a maximum. When the cams made of materials with a reversible shape memory are heated, a martensitic transformation occurs in the material material above the cams with the restoration of a previously given shape.

Thus, the nature of the heat treatment and the temperature range of the shape change depend on the type of material coupling in the mechanisms that require constant torsional rigidity of the shaft lines. Rigid couplings are used to connect the shafts in the mechanisms. Using an elastic coupling with constant

50 torsional stiffness allows to significantly reduce the requirements for the alignment of the connected shafts and significantly reduce the vibration transmitted during rotation due to damping;

gg properties of the intermediate element.

Claims (1)

Invention Formula An elastic coupling containing two axially mounted coupling halves with face cams and placed between 503932 rial possessing the property of reversible form memory. In this case, with an increase in the temperature of the coupling, the width of the cams increases, and with a decrease in temperature, it decreases. The clutch works as follows. When transmitting the rotation of the clutch as a result of internal friction in the material of the rubber sprocket 4, the latter heats up. At the same time, the material of the sprocket 4 (rubber) softens, which leads to a decrease in the torsional rigidity of the coupling. asterisks 4 cams 3 in re- as a result, heat transfer is also heated, and when heated from 20 to 70 asterisks 4 cams 3 in re- smoothly change their shape from the original (figure 1) to the form with a maximum living environment. Therefore, the elastic coupling has a constant torsional stiffness regardless of the change in the properties of the elastic element made of elastomeric material (for example, rubber) as a result of This allows the use of elastic coupling in mechanisms that require constant torsional rigidity of the shaft lines. Rigid couplings are used to connect the shafts in the mechanisms. Using an elastic coupling with constant torsional stiffness significantly reduces the coaxiality of the connected shafts and significantly reduces the vibrations transmitted during rotation due to damping; properties of the intermediate element. Invention Formula An elastic coupling containing two axially mounted coupling halves with face cams and placed between Cams are an elastic intermediate element, characterized in that, in order to increase reliability by stabilizing torsional rigidity during operation, the cams of coupling halves are made in the form of brackets made of a material with a shape memory effect, the base of which is trapezoidal and attached to facing each other. friend ends of the coupling halves, and the bent side faces of the brackets are in contact with the elastic element with their external surfaces. Phi2.2 3 Editor N.Rogulich Compiled by T. Orlova Tehred A. Kravchuk Proofreader L. Pilipenko Order 5244/35 Circulation 804 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 Fy