CN1690384A - Long-crank reciprocating-piston engine - Google Patents

Abstract

The invention relates to a long crank oscillating piston generator, wherein, the piston (2) and crank (3) are connected by the link rods which are formed by A, B, C, D, E five rigidity link rods; one end of rod A (4) is hinged with piston while another end is hinged with one end of rod B (5) and one end of rod C (6) to form a composite hinge; one end of rod C (6) is hinged with the body of rod D (7); another end of rod B (5) is hinged with the body of rod E (8); one end of rod D (7) is hinged with the cylinder (1) while another end hinges one end of rod E (8); another end of rod E (8) hinges the crank axle (3). Said invention changes the former single stage transmission between piston and crank axle into second stage transmission, while the piston drive the link rods to oscillate and the link rods magnify the moving distance of piston to rotate the crank axle, and the length of crank of crank axle is longer than a half of stroke length of piston. Therefore, the length of crank can be increased without increasing the stroke length of piston and the energy consumption rate of generator or the stroke length of piston can be reduced without reducing the length of crank.

Description

Long crank conventional engine

Technical field:

The present invention relates to a kind of motor that is connected to feature, especially a kind of long crank conventional engine with piston and crank.

Background technique:

Conventional engine adopts the connecting rod of a rigidity to connect piston and bent axle usually at present, piston, connecting rod and bent axle constitute a slidercrank mechanism, this design, crank length and piston stroke are subjected to the restriction of connecting rod, and piston stroke equals the twice of crankshaft crank length.When needs provide the bent axle that has than big crank length (the moment of torsion arm of force), must the corresponding stroke that increases piston, thus increase volume of cylinder, otherwise, when reducing piston stroke, also will inevitably correspondingly reduce crank length (the moment of torsion arm of force).

Summary of the invention:

The object of the present invention is to provide the twice of a kind of piston stroke less than crankshaft crank length, can under the situation that does not increase piston stroke, increase crankshaft crank length, or under the situation that does not reduce crankshaft crank length, reduce the long crank conventional engine of piston stroke.

For achieving the above object, the connection rod set of passing through the connecting rod formation of bar A, B, C, D, five rigidity of E between piston and the crank connects, bar A one end and piston hinge, the end of the other end and bar B, the hinged formation compound hinge of the end of bar C, the shaft of the bar C the other end and bar D is hinged, and the shaft of the bar B the other end and bar E is hinged, and the cylinder body of bar D one end and cylinder is hinged, the end of the other end and bar E is hinged, and the other end and the bent axle of bar E are hinged; Bar B, bar C, the shaft of bar D between bar C, D articulating point and bar E, D articulating point, the bar E shaft between bar E, D articulating point and bar B, E articulating point constitutes a mobilizable rhombus.

The present invention changes the transmission between original piston and the bent axle into the secondary transmission by single-stage driving, and piston slide to drive the connection rod set swing, and connection rod set is amplified the back with the displacement distance of piston and driven crankshaft rotating, and the crank length of bent axle is greater than half of piston stroke.Thereby, can not increase piston stroke, do not increase the crank length that increases bent axle under the condition of motor fuel consumption rate, or under the situation that does not reduce crankshaft crank length, reduce piston stroke.

Description of drawings:

Fig. 1 is a structural representation of the present invention.

Fig. 2 is a movement process schematic representation of the present invention.

Embodiment:

Bar A, B, C, D, E just make the long strip connecting rod.Connection rod set is connected with 3 of the cylinder bodies of piston 2, bent axle 3, cylinder 1.Adopt the connecting means of existing engine link and piston, bent axle, bar A4 and piston 2 flexibly connect in tie point 11 places, and bar E8 and bent axle 3 flexibly connect in tie point 12 places.The connecting means of bar A4, bar B5 and bar C6 is as follows, on the piston end far away of bar A4, get out a circular hole, also get out the circular hole of an identical size respectively at the end of bar B5 and bar C6, in three circular holes, squeeze into the pin of corresponding size then, bar A, B, C are linked together at tie point 21 places, can rotate mutually in twos between bar A, B, the C.Being connected between remaining bar and the bar is connected the same connecting means of adopting above pin, circular hole between the cylinder body of bar E8 and cylinder 1, and be hinged at tie point 22,23,24,25 places respectively.

Bent axle of the present invention can be biasing.

As shown in Figure 2, during engine operation, bar A, B, C tie point 21 move along track 31, and the rhombus that bar B, C, D, E constitute rotates thereupon and changes shape.Corresponding with it, the tie point 12 of bar E8 and bent axle 3 moves along circular trace 32.When piston 2 was positioned at top dead center, bar A, B, C tie point 21 were positioned at an a, and the tie point 12 of bar E8 and bent axle is positioned at an a '; When piston 2 was positioned at lower dead center, bar A, B, C tie point 21 were positioned at a f, and the tie point 12 of bar E8 and bent axle 3 is positioned at a f '.

When crank length was 1 unit length, the piston stroke of motor can only be 2 at present, and vice versa.In the present invention, crank 3 length are similarly 1 unit length, and when adopting the connection rod set of following size to connect piston 2, bent axle 3, piston stroke is 1.143.The length of bar A4 between tie point 11, tie point 21 is 1.428, the length of bar B5 between tie point 21, tie point 22, the length of bar C6 between tie point 21, tie point 23, the length of bar D7 between tie point 23, tie point 24, the length of bar E8 between tie point 22, tie point 24 all is 1, the length of bar D between tie point 24, tie point 25 is 1.280, and bar E is at tie point 24, and the length between the tie point 12 is 1.928.See, the present invention has changed length ratio fixing between piston stroke and the crankshaft crank, can under the situation that does not increase piston stroke, increase crankshaft crank length, or under the situation that does not reduce crankshaft crank length, reduce the long crank conventional engine of piston stroke.

Claims (1)

1, a kind of long crank conventional engine, the bent axle (3) that wherein has a piston (2) that can in a cylinder (1), move at least and be connected with piston (2), it is characterized in that: pass through bar A between piston (2) and the crank (3), B, C, D, E (4,5,6,7,8) connection rod set of the connecting rod of five rigidity formation connects, bar A (4) one ends and piston (2) are hinged, the end of the other end and bar B (5), the hinged formation compound hinge of the end of bar C (6), the shaft of bar C (6) the other end and bar D (7) is hinged, the shaft of bar B (5) the other end and bar E (8) is hinged, the cylinder body of bar D (7) one ends and cylinder (1) is hinged, the end of the other end and bar E (8) is hinged, and the other end of bar E (8) and bent axle (3) are hinged; Bar B (5), bar C (6), the shaft of bar D (7) between bar C, D articulating point and bar E, D articulating point, bar E (8) shaft between bar E, D articulating point and bar B, E articulating point constitutes a mobilizable rhombus.