RU2256800C2 - Asynchronous rodless mechanism - Google Patents

Abstract

FIELD: mechanical engineering.

SUBSTANCE: proposed mechanism can be used for converting reciprocation into rotation and vice versa. Mechanism contains two intermediate shafts, each being hinge-connected with supports crank and with common eccentric bushing. Rotating gears are installed on shafts with pitch circle radius equal to one fourth of piston being in engagement with fixed internal gears with pitch circle radius equal to half of piston stroke. Gears can be installed both from side of eccentric bushing and from side of support cranks. Eccentric bushing has two holes which can be either blind or through, and can be arranged diametrically or at some angle depending on stroke, number of cylinders and arrangement of cylinders.

EFFECT: improved reliability, reduced overall dimensions.

4 cl, 5 dwg

Description

The invention relates to mechanical engineering and can be used in the construction of internal combustion engines, compressors, as well as in all mechanisms for converting reciprocating motion into rotational and vice versa.

A known rod-free mechanism comprising a housing, two cranks, between which a crankshaft is mounted, connected to the rods by rod necks, a rotation synchronization mechanism made in the form of gears, which are mounted on the supporting necks of the crankshaft and are engaged with stationary, made with internal gearing (S. S. Balandin. Rodless internal combustion engines. - M.: Mechanical Engineering, 1972, p. 14, Fig. 11 (b)).

Also known is a synchronous rodless mechanism containing two cranks, two rotating gears with a radius of the initial circle equal to one fourth of the piston stroke, installed to interact with stationary internal gears having a radius of the initial circle equal to half the stroke of the pistons, an intermediate crankshaft with gears which are rigidly mounted on it, while the shaft can be made with one elbow connected to two piston rods, or with three elbows located in one plane, while the two extreme knees are directed in the same direction and connected with the piston rods, and the middle knee is equipped with an additional support in the form of an eccentric sleeve (metro number 25536, MKP 7 F 01 B 9/02, bull. No. 28 , 2002).

The closest set of essential features to the claimed technical solution is a rod-free mechanism containing two cranks on which gears with a radius of the initial circle equal to one quarter of the stroke of the pistons are rigidly mounted and interacting with stationary gears of the internal gear with a radius of the initial circle equal to half the stroke pistons, as well as a support with an intermediate shaft installed in it, pivotally connecting the rotating gears to each other, with the possibility of their movement Iya in antiphase. In this case, the gears are located on the knees of the cranks from the side of the intermediate support (AS USSR No. 1525283, Mkl. ⁴ F 01 B 9/02, bull. No. 44, 1989).

A disadvantage of the known technical solution is the complexity of the multi-link structure of the mechanism in the form of three articulated interconnected cranks, which reduces the reliability of the device and increases its dimensions.

The task was to create a reliable rodless mechanism with different phases of the movement of the rods and pistons and, in particular, with moving them in antiphase, to reduce its dimensions and expand its applicability.

The problem is solved due to the fact that the mechanism contains two intermediate shafts, each of which is pivotally connected to one of the supporting cranks, and, on the other hand, is pivotally connected to an eccentric sleeve common to the two shafts. Rotating gears with a radius of the initial circle equal to one fourth of the piston stroke, meshed with stationary gears of the internal gear with a radius of the initial circle equal to half the stroke of the pistons, are rigidly mounted on the side necks of the intermediate shafts. In this case, the gears can be installed both from the side of the eccentric sleeve and from the side of the supporting cranks. The eccentric sleeve, pivotally interconnected with the intermediate shafts, has two holes, the location of which can be diametrical or at some angle, depending on the stroke, the number of cylinders and the rows of their location. The eccentricity of the holes is equal to the crank arm, i.e. one fourth of the stroke of the piston. Rotating gears meshed with stationary gears provide the possibility of movement of the phase-shifted rod elbows of the intermediate shafts and the rods interconnected with them, in particular in antiphase.

The claimed technical solution is illustrated by drawings, where:

figure 1 shows a diagram of an asynchronous rodless mechanism, option 1;

figure 2 is a diagram of an asynchronous rodless mechanism, option 2;

figure 3 is a diagram of an asynchronous rodless mechanism, option 3;

figure 4 is a section aa;

figure 5 is a section bB.

The asynchronous rodless mechanism (Figs. 1, 2, 3) contains two intermediate crankshafts 1 and 2, pivotally connected to the supporting cranks and a common eccentric sleeve 8, which can be rotated in the bearings 7. On the lateral necks of the intermediate shafts, the rotating gears 3 and 4 with a radius of the initial circle equal to one fourth of the piston stroke (not shown in the diagrams), meshed with stationary gears of internal gear 5 and 6 with a radius of the initial circle equal to half the stroke of the pistons. In this case, gears 3 and 4 can be installed both from the side of the eccentric sleeve (figure 1), and from the side of the supporting cranks (option 2, figure 2). The eccentric sleeve 8 has two through or blind holes (not shown in the diagram) (Figs. 4 and 5), the arrangement of which can be diametrical or at an angle φ corresponding to the beat, the number of cylinders and the rows of their arrangement. The eccentricity of the holes r is equal to the crank arm (Figs. 4 and 5), i.e. one fourth of the stroke of the piston.

Rotating gears 3 and 4, meshed with stationary gears 5 and 6, provide the ability to move in antiphase of the rod elbows of the intermediate shafts 1 and 2 and the rods 9, 10 interconnected with them (FIGS. 1 and 2) or with shifted phases (option 3 , Fig. 3).

The eccentric sleeve 8 allows to increase rigidity and reduce the dimensions of the mechanism and expands its applicability.

Asynchronous rodless mechanism with different phase movement of the pistons works as follows.

On the fixed crowns of gears 5 and 6, rotating counterclockwise about their axis, gears 3 4 are run-in together with intermediate crankshafts 1, 2. In this case, the supporting cranks and the eccentric sleeve 8 rotate clockwise in their fixed bearings. The gears 3, 4 installed on the intermediate crankshafts, both from the sleeve side (Fig. 1) or from the side of the supporting cranks (Fig. 2), during their rotation provide, as antiphase reciprocating movement of the knees of the intermediate shafts together with rods 9, 10 and pistons (not shown in the diagram), as well as with displaced phases (Fig. 3).

The claimed technical solution provides asynchronous multi-phase movement of the rods and pistons using a second support for the intermediate shafts of one eccentric sleeve, which allows to increase the reliability of the structure and reduce the overall dimensions of the mechanism.

Asynchronous rodless mechanism with multi-phase movement of the pistons will be widely used in the construction of internal combustion engines, compressors, in devices for converting reciprocating motion into rotational and vice versa.

The claimed technical solution meets the requirement of industrial applicability and is possible for implementation on standard technological equipment using modern technologies.

Claims (4)

1. An asynchronous rodless mechanism containing two intermediate shafts on which rotating gears are rigidly mounted with an initial circle radius equal to one quarter of the piston stroke, interacting with a pair of stationary internal gears having an initial circle radius equal to half the piston stroke, characterized in that the mechanism is equipped with a common support for two intermediate shafts, made in the form of an eccentric sleeve with two holes, the eccentricity of which is equal to one fourth of the stroke the piston, while the elbow of the intermediate shafts are connected to the piston rods and installed in accordance with the specified phases of movement and, in particular, with the possibility of moving them in antiphase. 2. The mechanism according to claim 1, characterized in that the rotating gears can be mounted on the intermediate shafts both from the side of the eccentric sleeve and from the side of the cranks. 3. The mechanism according to claim 1, characterized in that the eccentric sleeve may have two holes located at a radius equal to one fourth of the piston stroke at different angles in accordance with the stroke, the number of cylinders and their row, in particular, the holes can be diametrically . 4. The mechanism according to claim 1, characterized in that the holes in the eccentric sleeve can be both blind and through.

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