A gasoline engine crankshaft

A gasoline engine and crankshaft technology, which is applied to the crankshaft and other directions, can solve the problems of crankshaft balance affecting the strength of the crankshaft, complicated casting processes, etc., and achieve the effects of simplifying development costs, simple casting processes, and improving strength.

Active Publication Date: 2017-12-29
CHONGQING CHANGAN AUTOMOBILE CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The application publication number is CN103016508A, and the application publication date is April 3, 2013. The invention patent discloses a crankshaft with a hollow connecting rod journal. In this technology, the connecting rod journal is designed with a hollow structure to form a weight-reducing hole. , but except for one oil hole, the rest of the hollow structure is closed around, and the casting process is complicated; moreover, the selection of the position of the lightening hole will directly affect the strength and balance of the crankshaft, but this technology does not take this into consideration

Method used

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  • A gasoline engine crankshaft
  • A gasoline engine crankshaft
  • A gasoline engine crankshaft

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with accompanying drawing.

[0018] figure 1 It is a traditional crankshaft structure, and the connecting rod journal on the crank arm is a solid structure. The weight of the crankshaft can be reduced by removing the weight of the crankshaft balance weight. However, this solution will sacrifice the balance of the crankshaft to meet the requirements.

[0019] Such as figure 2 As shown, the crankshaft structure of the present invention includes the main journal 4 and the crank arms 6 arranged at intervals in sequence on the main journal 4, and the connecting rod journal 5 connected to the crank arm 6 has a weight-reducing through hole 1 along the axial direction. The radial direction of the weight reduction through hole 1 is a semicircular opening with a smooth transition. The semicircular opening is located between the horizontal plane 9 of the shaft center of the connecting rod journal and the top 7 ...

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Abstract

The invention discloses a crankshaft of a gasoline engine, which comprises a main journal and crank arms arranged at intervals in sequence on the main journal, and a connecting rod journal connected with the crank arm is provided with a weight-reducing through hole, and the weight-reducing through hole is smooth in the radial direction Transitional semicircular opening, the semicircular opening is located between the axial level of the connecting rod journal and the top of the connecting rod journal, and the flat bottom of the semicircular opening is close to the axial level of the connecting rod journal and at a distance from it The first wall thickness, the arc top of the semicircular opening is close to the outer edge of the top of the connecting rod journal and has a second wall thickness therefrom. The invention achieves the purpose of reducing the weight of the crankshaft, improving the balance rate of the crankshaft and reducing the oil consumption of the engine by designing the through hole for reducing the weight of the journal of the traditional crankshaft connecting rod.

Description

technical field [0001] The invention belongs to the technical field of automobile engines, and in particular relates to a crankshaft in an engine crank linkage mechanism. Background technique [0002] The crankshaft is one of the main moving parts of the internal combustion engine. Its main function is to convert the reciprocating motion of the connecting rod piston into a rotary motion, and drive other mechanism systems of the engine to operate, thereby driving the operation of the entire vehicle. [0003] The weight of the crankshaft plays a particularly important role in the process of engine lightweight and fuel consumption control, which can effectively reduce the overall fuel consumption of the engine. The application publication number is CN103016508A, and the application publication date is April 3, 2013. The invention patent discloses a crankshaft with a hollow connecting rod journal. In this technology, the connecting rod journal is designed with a hollow structure...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16C3/06
Inventor 徐小波薛东升蒋继科
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD
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