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Rolling friction combined piston

A rolling friction and combined technology, applied in the direction of pistons, engine components, machines/engines, etc., can solve the problem of difficult realization of processability, assembly and workability, no combination piston structure scheme, no piston movement form, etc. problem, to achieve the effect of simple structure, reduced friction loss, and avoiding cylinder scuffing

Active Publication Date: 2016-08-17
BINZHOU BOHAI PISTON CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this technology conceptually forms the rolling friction between the piston and the cylinder, it does not propose a clear structural scheme for the combined piston, nor does it give the movement form of the piston in the cylinder, and due to the complicated structure and components, its processability and assembly and workability are difficult to achieve

Method used

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Embodiment Construction

[0021] The specific structure and working form of the present invention will be further described below in conjunction with the accompanying drawings and embodiments, but they do not constitute a limitation to the present invention.

[0022] as attached figure 1 As shown, the rolling friction combined piston includes a piston body 1, a rolling bearing 2 and a connecting shaft 3, and the rolling bearing 2 is assembled to the piston body 1 through the connecting shaft 3.

[0023] as attached figure 2 As shown, there is no piston skirt at the lower part of the piston, and the two sides of the pin seat 4 extend outward with a certain thickness to form an extension wall 5. The thickness must ensure that the extension wall 5 can withstand the lateral pressure of the piston when it is working. Out of the through hole 6, there should be a certain distance between the through hole 6 and the edge of the extension wall 5, so as to prevent the extension wall 5 from being pulled off. Th...

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Abstract

The invention relates to a rolling friction combined piston which comprises a piston body and a rolling bearing which are combined through a connecting shaft. Two sides of a piston keyway extends outwards to form extending walls with through holes. A bearing inner ring is fixed on the connecting shaft. The outer surface of a bearing outer ring is arc-shaped and has ovality. When the piston body and the rolling bearing are combined, the bearing is located between the two extending walls. The connecting shafts is in interference fit with the through holes and the bearing inner ring respectively. By the structure, during operation, rolling action is formed between the bearing and the inner surface of a cylinder, and friction loss is lowered evidently as compared to slide motion; the connecting shaft elastically supports the bearing, and faults such as cylinder scoring can be avoided effectively; during bearing rolling, splash lubrication can be performed to pin holes, pins and the like, and the reliability of motion components is increased; weight reducing of forged steel pistons, cast iron pistons, and the like can be achieved.

Description

technical field [0001] The invention relates to a piston for an internal combustion engine, in particular to a rolling friction combined piston. Background technique [0002] In recent years, the engine has been developing towards high power, high load and light weight. At the same time, higher requirements have been put forward for the reliability and low friction of the piston, which requires continuous optimization of the structure. [0003] 30% of the engine power loss is caused by friction, and the sliding friction between the piston skirt and the inner surface of the cylinder is one of the main factors, which has a great influence on the effective power. In addition, due to the existence of lateral force, thermal expansion and second-order motion, it often causes serious wear and even strain on the piston skirt. To this end, domestic and foreign piston design manufacturers are committed to optimizing the fit between the piston and the cylinder, such as setting a shape...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02F3/00
Inventor 刘世英章健赵文斌郭伟熊培友
Owner BINZHOU BOHAI PISTON CO LTD
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