RU2837162C2 - Conrodless mechanism of piston machine of belkin - Google Patents

Abstract

FIELD: mechanical engineering.

SUBSTANCE: invention is intended for conversion of reciprocating motion of pistons into rotary motion of crankshaft of internal combustion engines, pumps and compressors. Conrodless mechanism for converting reciprocating motion into rotary motion comprises: housing 1, two rods, each of which is common for a pair of dual opposed pistons 4, two cams, which have a hinged connection with the middle of the rods, disc 5 with a hole, crank shaft 3, pinion shaft located on shaft journal 3. Mechanism is equipped with drive shaft 6 located on the neck of shaft 3 in the hole of disc 5 installed inside housing 1 at the middle of the distance between the geometric axes of the cylinders. Eccentricity of the geometrical centre of the hole of disc 5 relative to the geometrical axis of the centre of disc 5 is 1/4 of the stroke of piston 4 and is equal to the radius of rotation of the journal of shaft 3. Inside shaft 6 there is a rigidly fixed wheel having constant internal gearing with the pinion shaft, which is part of the journal of shaft 3. Eccentricity of the geometrical centre of the wheel relative to the geometrical centre of the axis of rotation of shaft 6 is equal to 1/4 of the stroke of piston 4. Ratio of pitch diameters of gear shaft and wheel is 1:2. Cams are located on opposite ends of shaft 6. Eccentricity of cams relative to geometrical centre of axis of rotation of shaft 6 is equal to radius of rotation of shaft 3 and is 1/4 of stroke of piston 4. Cams are made with possibility of transmission of synchronous serial motion of pistons 4 to shaft 6 driving shaft 3 and disc 5 by means of gear shaft.

EFFECT: invention is aimed at balancing the mechanism and increasing the rotation speed of the crank shaft.

1 cl, 6 dwg

Description

Field of technology to which the invention relates

The invention is intended to convert the reciprocating motion of machine pistons into the rotational motion of the crankshaft of internal combustion engines, pumps and compressors.

State of the art

A great many connecting rod-less mechanisms for converting reciprocating motion into rotary motion have been invented to date. The two largest groups are mechanisms created using the idea of S.S. Balandin, A.S. SU 118471 and crank-link mechanisms, for example, RU 2059851 C1, RU 2213227 C2, RU 2122638 C1, RU 2794018 C1, US 2004/0255879 A1.

Many mechanisms have also been invented that operate on other, very different principles: RU 2480596 C2, RU 2345259 C1, RU 2107204 C1.

The invention "A connecting rod-less mechanism for converting reciprocating motion into rotary motion of a piston machine" is known, patent RU 2107204 C1. In this mechanism, internal gearing with a tooth ratio of 1:2 is used to synchronize the movement of the piston rods with the engine shaft. This design of the mechanism has significant disadvantages:

1. The diameter of the pitch circle of the gear located on the crankshaft journal, at low power of the mechanism, especially for internal combustion engines, is small, therefore, in order to increase the diameter of the crankshaft journal, it is necessary to reduce the engagement module, which can lead to breakage of the teeth. Therefore, such a machine design limits the creation of low-power engines.

2. Difficulties with balancing the mechanism, since the drive shaft is located on the crankshaft journal, on the opposite ends of which there are eccentrics, therefore, a complex system of counterweights is required for balancing.

3. Limited crankshaft rotation speed due to design flaws.

This invention is aimed at eliminating these shortcomings.

Disclosure of the essence of the invention

The essence of the invention

The above-mentioned disadvantages are eliminated in a connecting rod-less mechanism for converting reciprocating motion into rotary motion, comprising a housing, two rods, each of which is common to a pair of twin oppositely located pistons, eccentrics having a hinged connection with the middles of the rods, a disk with a hole, a crank shaft, a gear shaft located on the neck of the crank shaft. According to the invention, the connecting rod-less mechanism is provided with a drive shaft located on the journal of the crank shaft in the opening of the disk installed inside the housing in the middle of the distance between the geometric axes of the cylinders, the eccentricity of the geometric center of the opening of the disk relative to the geometric axis of the center of the disk is 1/4 of the piston stroke and is equal to the radius of rotation of the journal of the crank shaft, a rigidly fixed wheel is located inside the drive shaft, having a constant internal toothed engagement with the pinion shaft, which is part of the journal of the crank shaft, the eccentricity of the geometric center of the wheel relative to the geometric center of the axis of rotation of the drive shaft is 1/4 of the piston stroke, wherein the ratio of the pitch diameters of the pinion shaft and the wheel is 1:2, the eccentrics are located on opposite ends of the drive shaft, the eccentricity of the eccentrics relative to the geometric center of the axis of rotation of the drive shaft is equal to the radius of rotation of the crank shaft and is 1/4 of the piston stroke, and the eccentrics are designed with the possibility of transmission of synchronous sequential movement of the pistons to the wheel of the drive shaft, which drives the crank shaft and disk by means of a gear shaft.

Brief description of the drawings

1. Fig. 1 shows all the main parts of the mechanism contained in the description of the mechanism.

2. Fig. 2 shows a top view, as well as a section line A-A of the mechanism along disk 5.

3. Fig. 3 shows a section A-A along the disk, containing the following parts: housing 1, disk 5, drive shaft 6, wheel 7 and crank shaft 3 with a gear shaft, as well as the geometric relationships specified in the invention formula.

4. Fig. 4 shows a sectional view of the assembly of the main unit of the mechanism for converting reciprocating motion into rotary motion, consisting of the following parts: disk 5, drive shaft 6, wheel 7, crank shaft 3, the neck of which is a gear shaft.

5. Fig. 5 shows a cross-section of the drive shaft, inside which the wheel 7 is rigidly fixed, as well as the geometric parameters between the centers of the eccentrics and the geometric axis of rotation of the drive shaft.

6. Fig. 6 shows disk 5 and the geometric parameters between the geometric center of the disk rotation axis and the geometric center of rotation of the drive shaft.

Implementation of the invention

The connecting rod-less mechanism comprises a housing 1, shields 2, two rods, each of which is common for a pair of double oppositely located pistons 4, two eccentrics that have a hinged connection with the middles of the rods, a disk 5 with an opening, a crank shaft 3, a shaft-gear, which is part of the journal of the crank shaft. The mechanism is equipped with a drive shaft 6, which is located on the journal of the crank shaft and is in the opening of the disk 5, installed inside the housing in the middle of the distance between the geometric axes of the cylinders. The eccentricity of the geometric center of the opening of the disk 5, relative to the geometric axis of the center of the disk, is 1/4 of the piston stroke and is equal to the radius of rotation of the journal of the crank shaft 3. Inside the drive shaft, there is a rigidly fixed wheel 7, having a constant internal toothed engagement with the pinion shaft, which is part of the journal of the crank shaft 3, the eccentricity of the geometric center of the wheel relative to the geometric center of the axis of rotation of the drive shaft 6, is 1/4 of the piston stroke, while the ratio of the pitch diameters of the pinion shaft and wheel 7 is 1:2. The eccentrics are located on opposite ends of the drive shaft 6, the eccentricity of the eccentrics relative to the geometric center of the axis of rotation of the drive shaft is equal to the radius of rotation of the crank shaft 3 and is 1/4 of the piston stroke. The eccentrics are designed with the possibility of transmitting synchronous sequential movement of pistons 4 to wheel 7 of drive shaft 6, which drives crank shaft 3 and disk 5 into rotation by means of a gear shaft.

The connecting rod-less mechanism operates as follows. The synchronous sequential operation of the pistons 4 is transmitted through the eccentrics to the wheel of the drive shaft 6, which is in constant engagement with the shaft-gear, which sets the crank shaft 6 and the disk 5 of the mechanism in rotation.

Claims (1)

A connecting rod-less mechanism for converting reciprocating motion into rotary motion, comprising a housing, two rods, each of which is common to a pair of twin oppositely located pistons, eccentrics having a hinged connection with the centers of the rods, a disk with an opening, a crank shaft, a gear shaft located on the neck of the crank shaft, characterized in that the mechanism is provided with a drive shaft located on the neck of the crank shaft in an opening in a disk mounted inside the housing in the middle of the distance between the geometric axes of the cylinders, the eccentricity of the geometric center of the opening in the disk relative to the geometric axis of the center of the disk is 1/4 of the piston stroke and is equal to the radius of rotation of the neck of the crank shaft, a rigidly fixed wheel is located inside the drive shaft, having a constant internal toothed engagement with the gear shaft, which is part of the neck of the crank shaft, the eccentricity of the geometric center of the wheel relative to the geometric center of the axis of rotation of the drive shaft is 1/4 of the stroke piston, wherein the ratio of the pitch diameters of the pinion shaft and the wheel is 1:2, the eccentrics are located on opposite ends of the drive shaft, the eccentricity of the eccentrics relative to the geometric center of the axis of rotation of the drive shaft is equal to the radius of rotation of the crank shaft and is 1/4 of the piston stroke, and the eccentrics are designed with the possibility of transmitting synchronous sequential movement of the pistons to the wheel of the drive shaft, which drives the crank shaft and disk into rotation by means of the pinion shaft.