Crankshaft with changeable crank length
A crank and variable technology, applied in the direction of the crankshaft, can solve the problems of high manufacturing cost, poor reliability, complex structure, etc., and achieve the effect of easy maintenance and replacement of parts, and reduced changes
Pending Publication Date: 2018-01-16
JILIN UNIV
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Problems solved by technology
[0008] In order to solve the technical problems of high manufacturing cost, poor reliability and complex structure in the prior art, the present invention provides a crankshaft with variable crank length
Method used
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Embodiment Construction
[0029] The present invention is described in detail below in conjunction with accompanying drawing:
[0030] Such as figure 1 As shown, the lower part of the plunger 6 is placed in the elliptical raceway groove at the upper end of the lower crank 8, and the gland 4 is fixed on the lower crank 8 by two limit bolts 3. The upper part of the plunger 6 is provided with a threaded hole, the size of which is the same as that of the upper crank. The threaded through holes are the same, and the plunger 6 and the upper crank 2 are fixed by two bolts 1 . The lower part of the plunger 6 is provided with two sealing ring grooves, and the two sealing rings 7 are respectively placed in the two sealing ring grooves.
[0031] Such as figure 2 As shown, the upper crank 2 has a symmetrical structure, and the left and right structures are symmetrical. The upper crank 2 has four threaded through holes, two at the left and right ends.
[0032] Such as image 3 , Figure 4 , Figure 5 As show...
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The invention discloses a crankshaft with changeable crank length, aiming at solving the problems in the prior art that the manufacturing cost is high, the reliability is poor and the structure is complicated. The crankshaft has a bilaterally symmetrical structure and comprises a bolt, an upper crank, a limiting bolt, a pressing cover, a sealing felt ring, a plunger piston, a sealing ring, a lowercrank, an upper oil path and a lower oil path, wherein the lower part of the plunger piston is mounted in an oval track-shaped groove formed in the upper end of the lower crank and the pressing coveris fixed at the upper end of the lower crank through the limiting bolt; the upper part of the plunger piston is mounted in an oval track-shaped groove formed in the bottom part of the upper crank andthe upper crank and the upper part of the plunger piston are connected together through a bolt. The plunger piston is connected with the upper crank and is also connected with the lower crank; oil enters the oval track-shaped groove formed in the upper end of the lower crank through the upper oil path or the lower oil path; the plunger piston and the upper crank can move up and down under the action of oil pressure in the oval track-shaped groove formed in the upper end of the lower crank, so that the compression ratio is increased and reduced.
Description
technical field [0001] The invention relates to an engine crankshaft, more precisely a crankshaft with variable crank length. Background technique [0002] Fossil energy is a kind of non-renewable energy. With the development of industry, energy reserves are reduced and the environment is deteriorating. The increasingly stringent emission regulations put forward higher requirements on the engine, and the compression ratio is an important factor affecting the engine economy. The compression ratio of the engine refers to the ratio of the cylinder volume when the piston moves to the bottom dead center and the cylinder volume when the piston moves to the top dead center. Increasing the compression ratio can effectively improve the performance and efficiency of the engine. In general, the higher the compression ratio of the engine, the longer the piston's working stroke, the more work it does, and the greater the output power. However, an excessively large compression ratio in ...
Claims
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IPC IPC(8): F16C3/06
Inventor 苏岩张玉林洪伟解方喜韩永强李小平姜北平
Owner JILIN UNIV