Novel crankshaft used for engine

An engine and crankshaft technology, applied in the field of crankshafts with a new structure, can solve the problems of large total length of the crankshaft, bending and torsional rigidity, etc., and achieve the effects of shortening the overall length, precise machining accuracy, and improving rigidity and strength

Inactive Publication Date: 2015-11-18
TIANJIN INTERNAL COMBUSTION ENGINE RES INST
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Problems solved by technology

[0003] At present, the integral crankshaft of the engine in the prior art has n turns in its basic structure, so there will be n+1 main shaft supports, that is, a fully supported crankshaft. Although the crankshaft of this structure is widely used, it has a large total length of the crankshaft. , low bending and torsional stiffness

Method used

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  • Novel crankshaft used for engine
  • Novel crankshaft used for engine
  • Novel crankshaft used for engine

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] as attached Figure 1-4 As shown, a new type of crankshaft for an engine includes front and rear main shaft supports 2 arranged at both ends of the crank shaft rod, and at least two bellcrank units connected by the main shaft supports 2 are arranged between the front and rear main shaft supports 2 , in this embodiment, there are two crank units; the crank unit includes three cranks 3 arranged in parallel, and the cranks 3 are made of an elliptical structure; cranks 1 are arranged between the cranks 3, that is, each Each bellcrank unit is provided with two bellcranks 1, and the centers of the two adjacent bellcranks 1 are respectively arranged at the upper and lower ends of the crank 3.

[0021] Wherein, the number ratio of crank throws and main shaft supports is n:n-1. In this embodiment, the crankshaft is provided with two crank throw units, the total number ...

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Abstract

The invention discloses a novel crankshaft used for an engine. The novel crankshaft comprises a front main shaft bearing and a rear main shaft bearing which are arranged at the two ends of a shaft rod of the crankshaft. At least two crank throw units connected through the main shaft bearings are arranged between the front main shaft bearing and the rear main shaft bearing. Each crank throw unit comprises three cranks which are arranged in parallel. Crank throws are arranged between the cranks. The centers of every two adjacent crank throws are arranged at the upper end and the lower end of the corresponding crank respectively. The novel crankshaft solves the problem that in the prior art, the total length of the crankshaft is too large, so that an engine mechanism can be more compact; and the problem that the bending rigidity and the torsional rigidity are low due to the fact that the crankshaft is too long is solved.

Description

technical field [0001] The invention relates to a crankshaft device, in particular to a crankshaft with a new structure for an internal combustion engine. Background technique [0002] The crankshaft is one of the most important parts in an engine. Its size parameters not only affect the overall size and weight of the engine to a large extent, but also affect the reliability and life of the engine to a large extent. The destruction of the crankshaft may cause serious damage to other parts of the engine. In the structural improvement of the engine, the improvement of the crankshaft also plays an important role. With the development and strengthening of internal combustion engines, the working conditions of the crankshaft are becoming more and more severe. Therefore, the strength and stiffness of the crankshaft become more serious. When designing the crankshaft, it is necessary to correctly select the size parameters, structural form, material and process of the crankshaft i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C3/08
Inventor 刘丽美王雪雁刘琦孙月海张立鹏
Owner TIANJIN INTERNAL COMBUSTION ENGINE RES INST
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