SU1330380A1 - Slider-crank mechanism - Google Patents

Abstract

The invention relates to mechanical engineering, namely to crank-slide mechanism. The purpose of the invention is to increase the reliability of the mechanism by eliminating unnecessary kinematic links. The mechanism contains a rack 1, a driving link located on it, a lever 4 kinematically connected with it, two cranks 6 and 9 mounted on the rack 1 rotatably and kinematically connected to the lever 4 by means of corresponding connecting rods 5 and 8. Moreover, the kinematic pairs binding elements of the mechanism can be made in the form of translational, rotational, cylindrical and spherical pairs. In this case, the sum of the degrees of freedom of the kinematic pairs, by means of which the driving link is connected with the pillar 1 and the lever 4, must be equal to five: the first crank 6 is connected with the connecting rod 5 and the lever 4 — the sum must be equal to two; the second crank 9 is connected with the second connecting rod 8 and the lever 4 — the sum must be equal to five. The movement of the slave link is transmitted to the lever 4, which by means of connecting rods 5 and B rotates cranks 6 and 9. 12 Il. (O (L S o 00 00 o 00 00 fft / et

Description

The invention relates to mechanical engineering, namely to crank-polzunny mechanisms, and can be used as an actuator mechanism in production machines in the metallurgical, machine-tool, light, printing and other industrial sectors.

The purpose of the invention is to increase the reliability of the mechanism by eliminating unnecessary kinematic connections.

FIG. 1-12, the kinematic diagrams of the mechanism are presented with various combinations of the kinematic pairs included in it.

The crank-slider mechanism includes a strut 1, a leading link associated with it, made, for example, in the form of a cylinder 2 mounted on a strut with the possibility of reciprocating and rotational motions. Two cranks are mounted on the rack 1 for rotation by means of a cylindrical joint 3. A lever 4 is connected kinematically to the drive link, which is connected by cylindrical hinges 3 to the first connecting rod 5 and the first crank 6. The kinematic connection of the lever 4 to the driving link is made in the form of a spherical hinge 7. The lever 4 is also kinematically connected by a second connecting rod 8 s. second crank 9. In this case, if the second crank 9 iv is engaged with the second connecting rod 8 by means of a spherical hinge 7, the lever 4 with the second connecting rod can be connected by means of the Hook 10 hinge (Fig. I) or translational-rotational pair 11 (Fig. 2 ) or spherical hinge 7 (Fig. 6) ..

The second connecting rod 8 can be connected to the second crank 9 by means of a two-shoulder driver 12 and two cylindrical hinges 3 with mutually perpendicular axes (Figs. 3 and 5).

The lever 4 may be connected to the second connecting rod 8 by means of a spherical

five

0

about

five

five

0

five

a hinge 13 having the possibility of axial movement, for example, using balls. Then the second crank 9 must be connected to the second connecting rod 8 by means of a cylindrical hinge 3 (FIG. 4).

When making a drive link in the form of a slide 14 mounted on a rack 1 with the possibility of reciprocating movement, it must be connected to the lever 4 by means of a cylindrical hinge 3 of the intermediate lead 15 and a spherical hinge 7 (Fig. 7-12) „

The mechanism works as follows.

Movement from the leading link is transmitted to the lever kinematically connected with it. The lever 4 moves through the connecting rods 5 and 8 which are kinematically connected with it and the connecting rods 5 and 8 are kinematically connected with the corresponding cranks 6 and 9 mounted on a rack I with the possibility of rotation.

Formula of invention

A crank-slider mechanism containing a slider kinematically associated with it a lever and a rack and mounted on a rack for rotation two cranks, kinematically connected with the lever by means of corresponding connecting rods, with the fact that In order to increase reliability, the slider is connected to the stand and lever by means of kinematic pairs, the sum of degrees of freedom is equal to five, the first crank is connected to the lever and the first connecting rod by means of kinematic pairs, the sum of degrees of freedom is two, and the second is The rigging is connected to the lever and the second connecting rod through kinematic pairs, the sum of the degrees of freedom of which is five.

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Compiled by A. Beetle Editor E. Sligan Tehred V. Kadar

Order 3564/38 Circulation 811 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

Proofreader V. Girn to

Claims (1)

Claim Crank-slide mechanism, comprising a slider kinematically connected with a lever and a strut and mounted on a strut with the possibility of rotation, two cranks kinematically connected with a lever by means of corresponding rods, characterized in that, in order to increase reliability, the slider is connected to the strut and the lever by kinematic pairs, the sum of the degrees of freedom of which is five, the first crank is connected to the lever and the first connecting rod through kinematic pairs, the sum of the degrees of freedom of which is two, and the second crank is connected An with a lever and a second connecting rod by means of kinematic pairs, the sum of the degrees of freedom of which is five. FIG. eleven