CN1114769C - Mechenism for converting reciprocating movement to circumferential one - Google Patents

Abstract

The present invention relates to a mechanism device for converting reciprocating motion into circumferential motion, particularly to convert the reciprocating motion of diesel pistons into the circumferential motion of cranks. The present invention comprises an air cylinder, a piston and a crank, wherein the piston can repeatedly move in the air cylinder, the crank is supported on a center surface of the air cylinder piston, a slide way body is fixed on a piston, and a slide way which is inclined to a piston motion direction is arranged on the slide way body. A cylindrical slide is sheathed on a crank pin of the crank, is supported in the slide way and can slide in the slide way, a convex exterior contact arc way and a concave exterior contact arc way are arranged in the middle part of the slide way, a tangent point of the two arc ways is a midpoint of the slide way, and the radius of the two circular arcs is equal to the length of a crank handle of the crank. With the present invention, the internal combustion engines have the advantages of no dead point, high efficiency, few components and compact structure.

Description

A kind of to-and-fro motion is converted to the device of circular movement

Technical field

The present invention relates to the mechanical device that a kind of to-and-fro motion is converted to circular movement, the to-and-fro motion that especially is useful in internal combustion engine is converted on the circular movement of bent axle.

Background technique

Existing reciprocal internal-combustion engine this point and crank length restriction that can occur dead point phenomenon and bent axle during lower dead center on piston is in the stroke of piston.

Summary of the invention

The invention provides the device that a kind of to-and-fro motion is converted to circular movement, make piston not have the dead point phenomenon at top dead center and lower dead center, the stroke of piston is not subjected to the crank length restriction of bent axle.

The present invention realizes like this, cylinder and in cylinder pistons reciprocating, and be bearing in bent axle on cylinder and the piston median plane support, be fixed with slipway on the piston, slipway has a slideway that favours the piston motion direction, the crank pin of bent axle is bearing in the slideway, and can slide in slideway.

Piston power stroke in cylinder, piston action is on slipway, and slipway and piston are moved together, because of the slideway on the slipway favours the moving direction of piston, so the crank pin of bent axle is subjected to the effect of perpendicular direction and transverse direction two power on the slideway, the making a concerted effort of two power, and the slip of crank pin in slideway, the crank pin that drives bent axle rotates around crank axle, and crankshaft pin all has the effect of moment in whole motion process, so there is not the dead point phenomenon.When piston in the cylinder during in other stroke state, the effect of inertia of crankshaft pin by flywheel moves reciprocatingly slipway and piston on slipway.The direction inclination of the length of piston stroke and slideway and slideway and piston motion is relevant.

The present invention also can put cylindrical slider on the crank pin of bent axle, thrust slide supporting also can slide in slideway in slideway, and cylindrical slider can be not have the outer ring, leaves the roller bearing of inner ring, rolling element and retainer.Reduce the power of awarding of rubbing that the crank pin of bent axle slides like this in slideway, repair again and in changing.

Slideway on the slipway of the present invention also can be that the middle part is two section one protruding one recessed circumscribed circular arc road, and the point of contact is at the mid point of slideway, and its radius of arc of two sections is equal to the crank length of bent axle.The following describes and adopt this scheme advantage.

Piston, connecting rod and the bent axle of existing reciprocal internal-combustion engine are hinged together, under the flywheel effect of inertia, piston is very short in the top dead center time, and working medium begins this process need a period of time in top dead center mixed combustion to expanding, be that this process is that piston is finished in the segment limit after budc, and this scope increases along with speeding of rotating speed, and the non-loss that deflagrates is arranged.As a same reason, piston is very short in the lower dead center time, so piston is under the effect of working medium expansion working, arrive before bottom dead center, exhaust valve will be opened in advance, and along with the speeding of rotating speed, open the corresponding increase of time of outlet valve in advance, it is insufficient to cause working medium to expand in cylinder, and exhaust loss is in advance arranged.

Known, general crankshaft support knows that then bent axle also is bearing on the center line of slideway on the support of cylinder piston median plane, so when piston was in top dead center or lower dead center, the crank pin of bent axle was in the middle part of slideway.

It is two section one protruding one recessed circumscribed circular arc road that the present invention adopts the slideway middle part, the mid point of slideway is the point of contact, the radius of two sections circular arcs is equal to the scheme of the crank length of bent axle, then piston at radian track that top dead center or lower dead center crankshaft pin rotate and slideway middle part in two sections one section or another section track coincide, when then crankshaft pin slips in these two sections one section or another section because of inertia, the pause of piston in top dead center or lower dead center can appear, then just can finish the process of working medium mixed combustion to the beginning of expanding in the dwell time, loss promptly deflagrates nothing but.Can in the dwell time, open by exhaust valve again, finish the free exhaust process, promptly not have exhaust loss in advance.

Owing to adopted such scheme, not only there is not the dead point phenomenon, the thermal efficiency increases, bent axle stressed, the movement velocity acceleration of piston tends to be reasonable, and simultaneously because of no connecting rod, parts are few, and structure is compactness more.

Description of drawings

The present invention is further described below in conjunction with drawings and Examples:

Fig. 1 is the vertical section structure figure of the embodiment of the invention.

Fig. 2 is the sectional view of Fig. 1 I-I '.

Fig. 3 to Fig. 9 is slipway and bent axle movement position sketch drawing.

Embodiment

Among Fig. 1 to Fig. 9,1 slipway; 2 pistons; 3 slideways; 4 slide blocks; 5 bent axles; 6 cranks; 7 crank pins; The moving direction of 8 pistons; 9 cylinders; 10 oil nozzles or spark plug; 11 valves,

Be the two sections circumscribed one protruding one recessed circular arcs in slideway middle part.

Two cylinders (9) flat opposed among Fig. 1 Fig. 2, in cylinder (9), slipway (1) two ends are fixed with piston (2), slideway (3) on the slipway (1) favours the moving direction (8) of piston (2), center line support upper support bent axle (5) at slideway (3), the crank pin (7) of bent axle (5) is with cylindrical slider (4) and is bearing in the slideway (3), and can slide in slideway (3), and slideway (3) middle part is two section one protruding one recessed circumscribed circular arc road , its two sections

Radius of arc be equal to crank (6) length of bent axle (5), the radian that piston rotates at top dead center lower dead center crankshaft pin (7) and slide block (4) partly and Or Circular arc coincide.

Further specify by slipway (1) and bent axle (5) movement position sketch Fig. 3 to Fig. 9, Fig. 3 is that the direction motion on slipway (1) edge (8) promotes bent axle (5) rotation or bent axle (5) promotes the direction motion on slipway (1) edge (8) by the inertia that is stored on the flywheel, arrive Fig. 4 position, (power stroke rotates for the piston slipway promotes bent axle, other stroke is that bent axle and flywheel inertia promote slipway and piston motion), Fig. 4 to Fig. 5 is that slipway (1) arrives an end and a cylinder piston is in top dead center, another opposed cylinder piston is in lower dead center, because of slideway (3) The crankpin slide block (4) of garden arc and bent axle (5) coincide at the radian track of this section rotation, so the crankpin (7) of bent axle (5) and slide block (4) slip over because of inertia The time of this section radian is exactly that piston is in the top dead center lower dead center dwell time, continue to move to figure (6), Fig. 6 is that slipway (1) moves to Fig. 7 along (8) direction promotion bent axle (5) rotation or bent axle (5) by flywheel inertia promotion slipway (1), Fig. 7 to Fig. 8 is that slipway (1) moves to the other end, cylinder piston is in top dead center, opposed cylinder piston is in lower dead center, because of slideway (3)

The crank pin (7) of circular arc and bent axle (5) and slide block (4) coincide at the radian track of this section rotation, so crank pin (7) slide block (4) slips over this section because of inertia The time of circular arc is that piston is in another top dead center and lower dead center dwell time.Continue to move to Fig. 9 position, Fig. 9 is that slipway (1) continues edge (8) direction promotion bent axle (5) rotation or bent axle (5) promotes slipway (1) motion because of flywheel inertia, and (3) position is schemed in arrival, and reciprocation cycle achieves the goal like this.

Claims (1)

1, a kind of to-and-fro motion is converted to the device of circular movement, comprise cylinder (9) and pistons reciprocating (2) in cylinder (9), and be bearing in bent axle (5) on cylinder (9) and piston (2) the median plane support, be fixed with slipway (1) on the piston (2), the slideway (3) that favours the piston motion direction is arranged on the slipway (1), the crank pin (7) of bent axle (5) is supported in the slideway (3), and can in slideway (3), slide, it is characterized in that slipway (1) sliding way (3) middle part is two section one protruding one recessed circumscribed circular arc road, the point of contact is at the mid point of slideway (3), and two sections radius of arc are equal to crank (6) length of bent axle (5).

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