ES1059373U - Two cams mechanism, for driving the crankshaft of a combustión engine. (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Mechanism two cams for actuating the crankshaft of a combustión engine, characterized by two deformable parallelograms, formed by four plates (t) (fig. # 1) each; together by four bolts (j) (fig. # 1), which rotate free two rollers (r) by a bolt (fig. # 4) and a piston (c) (fig. # 4) also by bolt. Between the two parallelograms they are mounted two cams (a) and (b) (fig. # 2), insert the cam shaft (b) within the cam axis (a) (fig. # 4) by turning them in counterrotating, by (X) bevel gear according to (fig. # 4). The cam (a) has the integral hollow shaft (y) terminating at the crown bevel gear group (X) (fig. # 4). The cam (b) has secured its solid shaft (h) which is the engine pto. (fig # 4.); the other end of the solid shaft (h) falls within the hollow shaft of the cam (a) (fig. # 4), and at its end carries integrally another crown bevel gear keyed (z) forming the bevel (x ) with conical satellites (k) and (l) according to (fig. # 4) (in this drawing have been omitted the other two satellites (k) and (l) for clarity). This forms a set of four pistons, two parallelograms and eight rollers rolling on the profile of two cams which rotate in counter, keeping the rise and fall of the pistons without loads on the sides of the pistons, enabling while two pistons opposites away the other two approaches, all integrated, forming a desmodromic system perfect balance. (Machine-translation by Google Translate, not legally binding)

Description

Two cam mechanism, for driving the crankshaft of a combustion engine.

Object of the invention

The present invention, as expressed in the set forth in this specification, refers to a mechanism designed to be applied primarily to a car engine four-piston four stroke, with remarkable advantages over all existing engines in automotive.

This mechanism is born with a perfect balance static and dynamic, so you don't need to weigh any of its parts, this translates into a total absence of vibrations: Its weight is reduced to one sixth of its equivalent, (crankshaft and connecting rods). A special peculiarity is that it gives half the revolutions that its four counterpart pistons, but giving the same number of explosions, this raises the torque more than double, a circumstance that translates into minors inertia, greater accelerations and retentions, resulting in an extremely elastic motor, getting a good torque at low Revolutions Frictions are drastically reduced by based on the rolling mechanism, and when the lateral friction of the pistons, as will be explained more Go ahead, this will certainly increase the life of the pistons and Fuel consumption will decrease.

Background of the invention

Numerous engine innovations are known throughout history, but it has never been possible to replace the crank system in the course of it, despite the problems that exist for balancing, both of the movements of 1st order, such as the impossibility of balancing the 2nd order; to this must be added the crankshaft weight, inertia, dimensions and cost of it.

Only one engine is known in practice radically different market (Wankel) by not having pistons, this it consists of a rotor that moves an eccentric or motor shaft of very short run, which gives three revolutions for each one that gives the rotor, this causes a very low torque, increased consumption and a reduced performance so it has never been compared to traditional pistons, and virtually no use brand, except Mazda that puts it in a single model.

Despite the high technology of which available, it has not been possible to suppress the lateral force that presses the piston against the cylinder walls, component originated by the obliquity of the connecting rod, precisely very important in the explosion run, which ovalizes the cylinder walls and originates  power losses due to friction and premature wear of the cylinder and piston

All these problems are solved with the mechanism that we propose next.

Description of the invention

The mechanism of the present invention presents a series of advantages when applied mainly to engines Four-cylinder four-stroke car.

The mechanism of two cams, for the operation of the crankshaft of a combustion engine , consists of two parallelograms formed by four plates (T) each, joined by four bolts (J), and to these bolts two rollers (R) are inserted and one piston (C) for each bolt according to (Fig. No. 1), forming a set of two parallelograms, four bolts, eight rollers, and four pistons.

Between the two deformable parallelograms, there are housed the two cams (A) and (B), where the axis of the cam (B) enters inside the hollow axis of the cam (A) (Fig. n ° 4) leaving the two cams aligned in parallel, where they will turn both in directions contrary and in the same plane, by a group of four bevel gears (X) where two bevel gear crowns (M) and (Y) are in solidarity with the respective axes of the cams (A) and (B) which in turn engage with the other four bevel gears (L) and (K), which move the axes of the four camshafts of the four pistons, according to (Fig. n ° 4) (Only the drawing shows two axes (L) (K) to be more transparent).

The profiles of the two cams are the tracks by where the eight rollers (R) (S) (Four per cam) roll as show the (Fig. 1 2 3 4) in different positions rotating the 1 two cams in opposite directions and adopting the parallelograms their different angles to the profiles of the two cams, getting these, do stretch and shrink alternately the two parallelograms, pushing the four up and down pistons, so that while two opposite pistons are separate the other two opposites come together forming a system compact, desmodromic, symmetric and balanced, both static as dynamic; aligning the two cams every quarter turn of the motor shaft preventing the lateral loads of the pistons, when supporting the scissor rollers on the cams, transforming into force usable on the output shaft (H) (Fig. 4) side loads that in conventional engines is lost in friction.

The entire system resides inside the carter with what which ensures perfect lubrication, and the gear group It can perfectly serve as an oil pump, as this engine is install flat and horizontally on the hood of the car where the motor shaft or power take off (H) (Fig. 4 n ° 10) would be projected vertically down in search of the gearbox of the vehicle, in that position the gear group would remain in the background.

A peculiarity of the mechanism we are dealing with is that unlike any conventional engine every race of piston, either up or down, the cams only rotate a quarter turn, which translates into a great advantage in as for the increase in torque, accelerations and retentions, or what which is the same, the drive shaft gives half the speed of a conventional engine but yes, with the same explosions, and the inertia would be reduced by half, which would obtain a very elastic engine that is what is intended in automotive with good bass, because this system holds the relationship very well Equal stroke diameter, what is understood as an engine square.

The cams can adopt different profiles and curvatures this depends on the career chosen for the engine construction, but they will always have to be consistent with parallelograms and rollers always keeping zero the slack in the system.

All this will always be mounted on bearings of needles and rollers

This mechanism can be perfectly adapted for drive two pistons two times, or four; it can be four four stroke or two pistons; and you can also trigger eight four stroke pistons putting two sets joined by the axis.

It is also mentioned, that this system also it can work with a single cam, without a conical group, with four or two pistons; in this case we would simplify mechanics, but the Side loads of the pistons would not disappear.

Description of the drawings

Fig. 1 - Shows the front position of the mechanism, in which the two cams, one behind the other (A) and (B) are aligned in their counter-rotating turn, the one inserted into the hollow shaft of the other, showing the section cut of the two axes (H) (I). The four plates (T) are also appreciated that form a parallelogram (Just behind and in the same plane is the other) Both are armed together with the eight rollers (R) two for each piston (Just behind and in it flat are the four rollers that are not seen), and the four pistons (C) (D) (E) (F), through the four bolts (J), forming a double parallelogram, in which it is housed between them, the two cams, which rotate in opposite directions supported rolling on the eight rollers that drive the four pistons

Fig. N ° 2- Shows the two cams in their evolution of rotation, positioned at 90 degrees; where also shows the position of the parallelograms, which in this position that It is half the stroke of the pistons form a square.

Fig. N ° 3- Shows the two cams in their evolution of rotation, positioned between 90 degrees and the alignment; where it shows the parallelograms in a different angle.

Fig. 4- Shows a view and side detail of the mechanism; the two cams (A) and (B) where the axis of the (B) rotates within the (A); it also shows the hollow shaft (I) that is jointly and severally connected to the bevel gear that forms the group conical (X);

The cam (B) is integral with the axis (H) that makes PTO engine; and the opposite end of the shaft (H) a Once mounted inside the hollow shaft of the cam (A), the bevel gear (X) by key (Z); and these mesh with the tapered (K) (L) (The other two tapered have been omitted in the drawing (K) (L) for clarity).

It also shows in detail, the piston (C) and the two rollers (R) (S) crossed by bolt (J) (They have omitted in the drawing the two parallelograms that would be mounted on the bolts (J).

Claims (1)

1. Mechanism of two cams, for the operation of the crankshaft of a combustion engine, characterized by two deformable parallelograms, formed by four plates (T) (Fig. N ° 1) each; joined by four bolts (J) (Fig. n ° 1), where two rollers (R) rotate free by bolt, (Fig. N ° 4) and a piston (C) (Fig. n ° 4) also by a bull. Between the two parallelograms, two cams (A) and (B) (Fig. 2) are mounted, I insert the cam axis (B) into the cam axis (A) (Fig. N ° 4) turning you are in opposite directions, by means of the group (X) of bevel gears, according to (Fig. n ° 4). The cam (A) has its hollow shaft (Y) integral with it, ending in the conical gear crown of the group (X) (Fig. 4). The cam (B) has its solid shaft (H), which is the engine power take-off. (Fig. 4); the other end of the solid shaft (H) enters the hollow shaft of the cam (A) (Fig. n ° 4), and at its end it bears another conical gear crown, by means of a key (Z) forming the conical group ( X) with conical satellites (K) and (L) according to (Fig. N ° 4) (In this drawing the other two satellites (K) and (L) have been omitted for clarity). All this forms a set of four pistons, two parallelograms and eight rollers that roll on the profile of two cams that rotate in counter rotation, keeping the pistons up and down without loads on the sides of the pistons, making it possible while two pistons Opposites move away the other two approach, all integrated, forming a demodomic system of a perfect balance.