SU848821A1 - Friction mechains with nonorthogonal crossed axis - Google Patents

Description

The invention relates to general mechanical engineering, in particular to mechanisms for converting the rotational motion of the driving link into the helical movement of the driven link, and can be used as mechanisms of winding machines in electrovacuum production.

Known three-link mechanism of friction conical wheels with external contact and orthogonal axes, containing a leading friction conical wheel, rotating vokurg fixed axis, and a driven friction conical wheel interacting with it, as well as rotating around a fixed axis {1].

However, in this mechanism, the rotational motion of the driving link is converted only into the rotational motion of the driven link, which limits the kinematic possibilities of transmission.

‘The closest to the invention in terms of technical nature and the effect achieved is a friction mechanism with non-orthogonal intersecting axes, containing a driving link rotating around a fixed axis and a driven link making helical movement around and along its fixed axis [2].

However, the known mechanism does not provide increased durability and efficiency by eliminating the slip of the active surfaces of the links relative to each other.

The purpose of the invention is to increase durability and efficiency by eliminating the slip of the active surfaces of the links relative to each other.

This goal is ensured by the fact that the active surface of the leading link is made in the form of a section of a hyperboloid of rotation, spaced from its throat section at a distance greater than the radius of this glow, with an angle of 848821 of 4 inclination of the generatrix of the hyperboloid-to its axis and the radius of the throat section a, determined by the dependencies *, and ^ -1), the friction energy in the contact zone of these surfaces.

Claims (2)

n & kj) on the generator forming a hyperboloid. to its axis cA and radius of the throat section G, defined by the arcCh dependencies (u, V Гv RlCчV) a convolute helicoid with a main cylinder radius equal to the throat section radius of the hyperboloid, and the center angle of the mechanism is equal to the arc value of the first value ratio. The drawing shows the scheme of the proposed mechanism. The friction mechanism contains a driving link 1 with a fixed axis of rotation 0 0 and a driven link 2 with a fixed axis 0 0, d. The link level 1 is active in the form of a straight convolutive helicoid 4, the generatrix of which coincides with the generator of hyperboloid 3, and the hyperboloid 3 and the straight convoluted helicoid 4 relate along this generatrix. During the operation of the mechanism, the rotation of the driving link 1 around the fixed axis 0 0 with a constant angular velocity and; is converted into rotational and translational motion of the slave link 2 around and along the axis OdO, with constant speeds w to M. Thus, the application of the proposed design allows increasing the durability and efficiency of the friction mechanism of the helical gear due to elimination of sliding friction between active surfaces of the links. The durability is increased by reducing the wear of the active surfaces, and the efficiency is due to the reduction in friction energy losses in the contact zone of these surfaces. Claims of the Invention A friction mechanism with non-orthogonal intersecting axes, containing a drive link rotating around a fixed axis, and a driven link making a helical movement around and along its fixed axis, which is made possible by the fact that in order to increase durability and efficiency by eliminating sliding surfaces of the links relative to each other, the active surface of the driving member is made as a section of a hyperboloid of rotation, spaced from its throat section at a distance greater than the radius of this Section, with the angle of inclination of the generatrix of the hyperboloid to its axis c and radius of the throat section a, determined by dependencies c.arctg (,) - 0.5jc, .p, (ui., - 0.5-, where the gear ratio; P. is the parameter the screw movement of the driven link, the active surface of the driven link is made in the form of a direct convolute helicoid with the radius of the main cylinder equal to the radius of the throat section of the hyperboloid, and the center angle of the mechanism is equal to the arcs ratio of the gear ratio. Sources of information taken into account during the examination 1.Artobolevsky I.I. Mechanisms in modern technology. M., Science, 1975, Vol. 1U, p. 288. 2. In the same place 290 (prototype).