SU1555553A1 - Adjustable eccentric unit - Google Patents

Abstract

The invention relates to mechanical engineering, in particular to eccentric mechanisms with adjustable eccentricity, and can be applied in drives where it is necessary to change the stroke of the driven elements without stopping the drive. The purpose of the invention is to simplify the design and improve ease of use. The adjustable eccentric assembly consists of an eccentric 1, the mechanism for changing the eccentricity in the form of a compensating flexible coupling 2 and a driving adjustment element in the form of an eccentric sleeve 3. The coupling 2 consists of a leading coupling half (П) 4, a driven half coupling (П) 5 and a crosspiece (К) 6 from elastic links 7. K 6 is located between P 4 and 5. Elastic links 7 are formed parallel to each other and the axis of rotation by elements 8, the ends of which are connected in series and zigzag with each other to form a gap between elements 8 8. Eccentric 1, K 6, P four 5 are integrally formed. At least one of the coupling halves is provided with an eccentric bushing 3. It is rotated both manually and remotely. 2 Il.

Description

The invention relates to mechanical engineering, in particular to eccentric mechanisms with adjustable eccentricity, and can be applied in drives where it is necessary to change the stroke of the driven elements without stopping the drive.

The purpose of the invention is to simplify the design and improve ease of use.

Figure 1 shows the device in the initial position, in which the eccentricity is zero, a general view; figure 2 - section aa in figure 1.

The assembly consists of an eccentric 1, a mechanism for changing the eccentricity in the form of a compensating flexible coupling 2

and a driving adjustment element in the form of an eccentric bushing 3. Coupling 2 consists of a leading coupling half 4, a driven coupling half 5 and a crosspiece 6 of elastic links 7. A cross 6 is located between the driving coupling half 4 and a driven half coupling 5. Elastic links 7 are formed parallel to EACH friend and axes rotation elements 8, the ends of which are sequentially and zigzag-shaped interconnected with the formation between the elements 8 of the gap 9. The eccentric 1, the crosspiece 6, the lead 4 and the knowledge 5 of the half-coupling are made in one piece. Slave Semi-coupling 5 is equipped with an eccentric sleeve 3 and installed with it,

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for example, in the lid 10 of the fixed housing 11. Moreover, the hole in the lid 10 is offset relative to the hole in the housing 11 for mounting the leading half of the coupling 4 by an amount equal to the eccentricity of the eccentric sleeve 3.

The eccentric node works as follows.

. When the leading half-coupling 4 rotates, its movement is transmitted through the cross, the fault 6 through its elastic links 7 to the driven half-coupling 5. Moreover, if the axes of the half-couplings 4 and 5 do not coincide,

cross 6 makes a plane-parallel movement in two mutually perpendicular directions relative to the elastic links 7. On the cross the cross 6 is made in one piece with the eccentric 1, the latter does the work, i.e. drives driven elements, such as plunger pump rods, switch pushers, swing lever fork, hydraulic vibrator valve, etc. The magnitude of the stroke of these driven elements is controlled by changing the eccentricity of the eccentric 1 by rotating the eccentric sleeve 3 by changing it. eccentricity and can vary from zero to a total eccentricity corresponding to the maximum eccentricity value of eccentric 1 equal to 2e,

For an adjustable eccentric assembly with one eccentric bushing, the total eccentricity is made up of the eccentricity of the bushing 3 and the eccentricity of the axes of the supports of the cover 10 and the housing 11.

For an assembly with two eccentric bushings, the total eccentricity is equal to the sum of the eccentricities of the bushings, and the axes of the supports of the cover 10 and the housing 11 should be coaxial.

The rotation of the eccentric sleeve 3 can be carried out both manually and remotely, using, for example, an electric motor. - The dependence of the eccentricity of the eccentric 1 on the angle of rotation of the eccentric sleeve 3 is determined by the formula

ten

A e (1-soy),

0

five

0

five

0

five

where A is the eccentricity of the eccentric 1 (the distance between the axles of the half couplings 4 and 5);

e is the eccentricity of the eccentric sleeve 3;

| i is the angle of rotation of the eccentric bushing 3 from the initial position, at which A 0.

Claims (1)

Invention Formula An adjustable eccentric assembly containing an eccentric, an eccentricity changing mechanism with a driving adjusting element, characterized in that, in order to simplify the design and increase the convenience of operation, the eccentricity changing mechanism is designed as a compensating flexible coupling with a cross piece of elastic links located between the coupling halves , the crosspiece is made in one piece with the eccentric and coupling halves, the elastic links are formed by elements parallel to each other and the axis of rotation, the ends of which follow flax and zigzag are interconnected with the formation of a gap between the elements, and the driving adjustment element is designed as an eccentric sleeve, which is equipped with at least one of the coupling halves. " ten eight