Unit of transmission mechanism and shaft for such unit

FIELD: machine building.

SUBSTANCE: unit of transmission mechanism, particularly, of internal combustion engine, consists of shaft (1) and of at least another one part (2, 3); also, shaft has bearing journals for installation in corresponding bearing orifices made in said part (2, 3). Surface of a bearing journal is equipped with antifriction coating; also, surface of a corresponding bearing orifice directly contacts this anti-friction coating. Anti-friction coating has a multi-layer structure. Here there is also claimed the shaft for the said unit of the transmission mechanism; the shaft can be a crank- or camshaft of the internal combustion engine.

EFFECT: simplified design of transmission mechanism unit; reduced weight and cost of units.

14 cl, 2 dwg

 

The present invention relates to a node of the transmission mechanism, in particular an internal combustion engine, containing a shaft and at least one other item, it is made with reference tails for installation in a corresponding bearing holes provided in the specified at least one part. The object of the present invention is also the shaft for this node.

Such a node can be, for example, installed in the casing of the engine crankshaft with the corresponding rods or installed the motor housing the camshaft.

In the US 6020025 And revealed mounted in the housing of the engine crankshaft. The bearings of a crankshaft provided with a hard nitride coating.

From DD 294317 known A5 camshaft, the Cams of which are at least partly covered with ceramic material.

In the automotive industry is increasingly seek to reduce the weight of the products and costs. This shows the prior art does not offer any solutions.

The present invention was based on the task of creating a site described above kind, which would be simpler and would provide weight reduction products and costs.

This problem is solved by a node transmitting mechanism, in particular an internal combustion engine, stereosexual and at least one other item. The shaft is made with reference tails for installation in a corresponding bearing holes provided in the specified at least one part, the surface of at least one bearing neck provided with anti-friction coating, the surface of the respective pivot hole is in direct contact with the antifriction coating. Anti-friction coating made of a multilayer. The multilayer structure allows the flexibility to adapt the anti-friction coating to the substrate material and the adjacent components of the transfer mechanism.

The object of the invention is also the shaft for the above site, made with reference tails for installation in a corresponding bearing holes provided in at least one other detail, the surface of at least one of the bearings is equipped with multi-layer anti-friction coating.

Due to the proposed invention perform node and coupled with the shaft part, there is no need of application required still bearing inserts in the bearing holes in a part corresponding to the supporting shaft necks. This not only leads to considerable simplification of the structure, but also to a significant reduction of weight. Weight reduction is achieved not only due to the absence on sinkovich liners, but due to the fact that proposed in the invention, the solution provides a reduction of the reference holes of at least the thickness of the walls of the missing shell bearings and thereby the external size of the corresponding parts. Refusal bearing inserts accompanies also the savings in Assembly, warehousing, diversity details). For example, the node consisting of the crankshaft and the respective connecting rods can be designed to perform the rods smaller and lighter than before. This has a positive effect on the dynamic behavior of the acceleration of the mass during operation of the engine. In accordance with that provided in the motor housing pivot holes for the crankshaft or the camshaft can be implemented, and the details for the account that is also smaller in mass.

The multilayer structure of the anti-friction coating provides the flexibility to tailor the coating to the substrate material and the adjacent components of the transfer mechanism.

The floor of the respective bearing journals of the shaft antifriction coating is carried out in a single setup, which makes the manufacturing of the proposed invention the shaft is technically and economically feasible.

As anti-friction coatings, depending on the areas of PR is changing any suitable well-known specialist of tribological coatings. Anti-friction coating can be sprayed, rolled, be applied by screen printing or electroplating methods. Also suitable layers obtained by the method of condensation from the vapor phase (PVD) or chemical vapour deposition (CVD).

The surface of each of the bearings can be provided with an antifriction coating partially or completely. Anti-friction coating can be, in particular, ceramic, metal or polymer coating.

It is advisable that the surface of the reference hole had low roughness may also purposeful structuring to improve tribological properties system "anti - friction coating-supporting hole". Also the reference holes may have purposefully made out-of-roundness or local differences in diameter. The treatment of the surfaces of the holes may be, for example, by honing.

The surface of the at least one anchor hole may also have the floor.

Described in more detail below example embodiment of the invention.

1 shows a crankshaft 1 of an internal combustion engine mounted in the bearings 2 of the housing. Located on the eccentric connecting rod and the neck of the shaft are the rods 3. Support in areas where indigenous necks of the shaft, a support In areas of the connecting rod journals and bearing With perception EfE what's forces have a functional coating, which has, in particular, sufficient emergency antibodies the ability for the lack of lubrication in the trigger conditions of the engine, which thus prevents the jamming of the parts, as well as sufficient ductility (toughness) to absorb probably present in the flow of the oil particles from abrasion and mud particles so that they do not lead to seizure and complete refusal of support.

The floor of the journals of the shaft in the said bearings And, In, With, in the simplest case, with the same multi-layered structure of metal or polymer coating 6, which can be separated from the material 4 bearings of the intermediate layer 5, as shown in figure 2, however, in principle, in accordance with various loads, it is also possible application in places supports various coatings with respectively different properties, such as strength, ductility (toughness), etc. In order to avoid unilateral increase pressure on the edges before the formation of the coating geometric shape of the necks of the shaft or, on the contrary, the holes corresponding support can be made slightly barrel-shaped.

1. The node transmission mechanism, in particular an internal combustion engine, containing a shaft and at least one other item, and the shaft is made with reference tails for installation in a corresponding bearing holes, provided the data in the specified at least one part, the surface of at least one bearing neck provided with anti-friction coating, the surface of the respective pivot hole is in direct contact with this anti-friction coating, wherein the anti-friction coating is performed with a multi-layered structure.

2. The node according to claim 1, characterized in that the surface of at least one bearing neck provided with antifriction coating part.

3. The node according to claim 1, characterized in that the surface of at least one bearing neck provided with antifriction coating completely.

4. The node according to one of claims 1 to 3, characterized in that the antifriction coating is a ceramic, metal or polymer coating.

5. The node according to claim 1, characterized in that the supporting holes are non-circular geometric shape with purposeful deviation from cylindrical.

6. Shaft for a node according to one of claims 1 to 5, made with reference tails for installation in a corresponding bearing holes provided in at least one other detail, the surface of at least one of the bearings is equipped with multi-layer anti-friction coating.

7. Shaft according to claim 6, in which the surface of at least one bearing neck provided with antifriction coating part.

8. Shaft according to claim 6, in which a surface is here at least one bearing neck provided with antifriction coating completely.

9. The shaft on one of PP-8, in which the anti-friction coating is a ceramic, metal or polymer coating.

10. Shaft according to claim 6, in which the surface of at least one anchor hole has a cover.

11. Shaft according to claim 6, in which at least one supporting shaft journal is made slightly barrel-shaped.

12. Shaft according to claim 6, in which at least one reference hole is made slightly barrel-shaped.

13. Shaft according to claim 6, in which the axial forces on the shaft are provided resistant surface with a single - or multilayer coating as an anti-friction coating.

14. Shaft according to claim 6, in which the axial forces on the shaft are provided resistant surface with a single - or multilayer coating as an anti-friction coatings, and support in the areas of the necks of the shaft is left uncoated.



 

Same patents:

FIELD: mechanical engineering.

SUBSTANCE: invention can be used in manufacture and assembling of internal combustion engines. According to proposed method of assembling of internal combustion engine, two shells are arranged on crankpin of crank-shaft so that inner surfaces of shells form common cylindrical surface whose axis does not coincide with axis of outer cylindrical surface of shells, but is parallel to said axis. Big end of connecting rod and cap of connecting rod are connected by bolts in initial position of shells at which shell butt joint coincides with butt joint of connecting rod big end and connecting rod cap, small end of connecting rod is connected with piston of cylinder of internal combustion engine. Actual capacity of combustion chamber of engine cylinder is measured when crankshaft is arranged in position corresponding to top dead center. Cap of connecting rod is disconnected. Shells are turned through angle providing required measured distance between axes of crankpin and connecting rod small end and corresponding change of capacity of combustion chamber. Then connecting rod big wend and connecting rod cap are connected by bolts again.

EFFECT: provision of possibility of changing position of connecting rod small end and, consequently, position of piston in top dead center and compensation for deviation of capacity of combustion chamber from optimum value caused by influence of different factors in process of manufacture of parts of internal combustion engine by introduction of changes into design of connecting rod.

1 dwg

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FIELD: machine building.

SUBSTANCE: invention refers to bearing unit of crankshaft of internal combustion engine. The bearing unit consists of bearing (10) mounted on crankshaft (16) of the internal combustion engine, of seat (11, 15) of the bearing designed for placement of bearing (10) and of system (20) of packing designed for sealing relative to crankshaft (16) and seat (11, 15) of the bearing. At least one part of seat (11) of the bearing has a reinforcing element (12) positioned in the seat of the bearing. Also, surface (13) of at least one part of seat (11) of the bearing adjoining bearing (10) is made out of plastic. There are also claimed the internal combustion engine comprising the said bearing unit and a hand tool with a mechanical drive containing the said internal combustion engine.

EFFECT: improved bearing unit of crankshaft due to bearing unit sealing and optimal installation of bearing and/or bushing of bearing in seat of bearing with decreased allowances, which prevents bearing and/or bushing of bearing rotation in bearing seat; minimised hazard of bearing distortion and bearing and/or bushing of bearing compression in bearing seat under force causing finite destruction of bearing and/or bushing of bearing.

13 cl, 4 dwg

Sliding bearing // 2398141

FIELD: machine building.

SUBSTANCE: sliding bearing consists of half-round upper insertion and half-round lower insertion separated one from another. The upper insertion consists of the first oil-conducting channel for supply of lubricating material (motor oil) from outside into a gap between the bearing and a shaft and the second oil-conducting channel facilitating flow of oil in a circular direction of the bearing. The first channel includes an opening in internal circumference opened into internal circumference of the upper insertion. The upper insertion includes a part without an internal recess without a channel on a back side relative to the opening in internal circumference in the direction of shaft rotation. An auxiliary oil-conducting channel for oil release from the second channel is made in at least one of lower insertions and in a zone on the next side of the opening in circumference in the direction of rotation. The second channel runs to a front side in the direction of shaft rotation from the opening in internal circumference to the auxiliary channel. In the second version the upper insertion of the bearing included a front end part on the front side relative to the opening, while the lower insertion includes the back end part corresponding to the front part. The auxiliary channel is formed with channels of an unloading recess and a face made on the internal circular side of at least one of the front parts of the upper insertions and the back part of the lower insertion. Oil consumption of the face channel is bigger, than oil consumption of material in the channel of the unloading recess. Also there is claimed the facility of torque transfer and the engine containing the sliding bearing.

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14 cl, 48 dwg

FIELD: mechanical engineering.

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EFFECT: increased service life of engine.

2 dwg

FIELD: engines and pumps.

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EFFECT: creation of simplified method for installation of intermediate bearing, in which: number of elements required for installation is reduced, installation flexibility and adaptability are provided.

44 cl, 5 dwg

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2 dwg

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