SU593021A1 - Play-free expansion coupling - Google Patents

Description

one

The invention relates to the field of instrumentation and can be used in all parts of the national economy to connect the axes of precise mechanisms under conditions of increased distortions and displacements.

Compensation sleeves are known that are designed to connect the axes of the mechanisms under the conditions of distortions and displacements, containing two coupling halves and an intermediate element in the form of a cylindrical liner 1, the assembly of such couplings is extremely labor-intensive.

Closest to the invention in technical essence and the achieved effect are couplings containing two coupling halves and movable spring-loaded connecting elements installed in the openings of the outer coupling half 2.

With increased distortions and displacements, the couplings do not work satisfactorily. They do not provide a backlash-free connection of the axes, do not allow large displacements and have low reliability, since the clutch element is the highest friction kinematic pair.

The purpose of the invention is to improve the compensating capacity of the coupling, reducing the size and simplifying the design.

The goal is achieved by the fact that the movable connecting elements are made in the form of a pair of cylindrical crackers with

pointed ends, and the inner half of the sleeve is made with flats on the outer surface, in contact with the pointed surface of the crackers, provided with an annular spring enclosing them.

In addition, the outer half coupling and the springs do not have an R-shaped axial section in axial section. In FIG. 1 shows a sectional coupling; nf FIG. 2 - section A-A of FIG. one; in fig. 3-coupling with two pairs of crackers; in fig. 4 and 5 - section bb and bb of fig. 3; in fig. 6 shows for coupling operation in the presence of axle displacement. The compensation coupling contains the coupling halves 1, 2 and the connecting element 3 in the form of a pair of floating crackers.

Half coupling 2 has flats 4 on a broken surface, ensuring linear contact with the crackers 3. Floating crackers 3

placed in the coupling half 1 in diametrically opposite holes and made in the form of cylinders, one end 5 of which has a point and the other 6 is provided with a groove (groove) for the spring 7. Direction

blade grooves and sharpened coincide.

Claims (2)

The contact between the flips 4 and the bread crumbs 3 is achieved by the spring 7. At the same time, the spring 7 performs the functions of orienting and fixing the crackers 3 in the plane of the rotational moment. The coupling half 1 is U-shaped, which prevents the rotation of the spring 7. The coupling works as follows. When the leading half coupling, for example half coupling 1, rotates, the torque is transmitted through connecting element 3 of driven half coupling 2. In case of displacement of the connected axes, the leading and driven coupling half shift one relative to the other by the misalignment value, compensating for it. At the same time, the coupling nature of the half-coupling does not change, since due to the presence of freedom of displacement between half-coupling 1 and crackers 3, on the one hand, and between coupling half 2 and crackers 3, on the other hand, the movement of crackers 3 relative to coupling half 1 and coupling half 2 relative to crackers 3. In the case of skew (kink) of the connected axes, the coupling half 2 rotates relative to the coupling half 1 by the amount of skew. Since the connection between the coupling halves is carried out through the crackers, which are tapering in the contact zone with the coupling half 2, such a turn will not change the nature of the coupling connection. With the simultaneous action of both factors, compensation occurs in the same way. The proposed coupling has a minimum number of parts and is distinguished by the simplicity of their forms — a combination of rotation surfaces and planes. The durability (reliability) of the coupling is ensured by the linear character of the junction between the rusks and the half couplings. The proposed design of the compensation coupling has been tested to connect the actuator (micro screw) of the actuating element and the reading device (scale). As a result of the tests, it was established that the coupling works at displacements up to 5 mm and tangencies of the connected axes up to 45 °. Claim 1. A backlash-free compensation coupling comprising two concentrically mounted coupling halves and movable spring-loaded connecting elements installed in the openings of the outer coupling half, characterized in that, in order to improve the compensation ability of the coupling, to reduce the size and simplify the design, the movable connecting elements are made as a pair of cylindrical crackers with pointed ends, and the inner half-coupling is made with flips on the outer surface that are in contact with the pointed tip the surface of the crackers, provided with a covering and ring spring. 2. A coupling according to claim 1, characterized in that the outer coupling half and the spring are in U-shape in axial section. Sources of information taken into account in the examination 1.Levin I. Ya. Reference book of the designer of precision instruments. M., “Mashinostroenie, 1964, p. 373-381. 2. USSR author's certificate number 361324, cl. F 16 D 3/26, 1971. (rig.g. and 1 h r rtr-lr L L t -e -and (Rig 3 B b ar t