GB2297599A

GB2297599A - Reciprocating piston assembley

Info

Publication number: GB2297599A
Application number: GB9502016A
Authority: GB
Inventors: Chui Cy Chiou
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-02-02
Filing date: 1995-02-02
Publication date: 1996-08-07
Also published as: GB9502016D0; FR2730270A1; DE19505467A1

Description

2297599 1 TITLE: A CYLINDER HAVING A PISTON ASSEMBLY CAPABLE OF STOPPING

ONCE WHEN HAVING MOVED UP AND DOWN EVERY TIME This invention relates to a cylinder having a piston assembly which will stop once when moving up and down every time.

It is found that the volume efficiency of the prior art cylinder cannot be enhanced on account of insufficient intake air. Although it is proposed to open the valve earlier and delay the close thereof or use a turbo-charger to obviate the drawback, the function will still be limited and the cylinder cannot provide higher volume efficiency as the piston moves quickly and the time for intaking air is shortened. In view of this drawback, the inventor has created a cylinder having a piston assembly capable of stopping once when having moved up and down every time. Nevertheless, such a cylinder is too complicated in structure thereby increasing the manufacturing cost thereof. 20 Therefore, it is an object of the present invention to provide a cylinder which may obviate and mitigate the above-mentioned drawbacks. This invention relates to a cylinder having a piston assembly which will stop once when moving up and down every time.

2 It is the primary object of the present invention to provide a cylinder which may increase the volume efficiency.

It is another object of the present invention to provide a cylinder which has sufficient intake air and cooling time even when the piston assembly quickly moves up and down.

It is still another object of the present invention to provide a cylinder having a piston assembly capable of stopping once when having moved up and down every time which is especially helpful for actuating a press or the like.

It is still another object of the present invention to provide a cylinder having a piston assembly capable of stopping once when having moved up and down every time which is simple in construction.

It is a further object of the present invention to provide a cylinder having a piston assembly capable of stopping once when having moved up and down every time which is practical in use.

3 Other objects of the invention will in part be obvious and in part hereinafter pointed out.

The invention accordingly consists of features of constructions and method, combination of elements, arrangement of parts and steps of the method which will be exemplified in the constructions and method hereinafter disclosed, the scope of the application of which will be indicated in the claims following.

FIG. 1 is a sectional view of the present invention; FIG. 2 is a sectional view taken along line 2-2 of FIG. 1; FIG. 3 shows the principle of the present invention; and FIG.4 is a working view of the present invention.

For the purpose of promoting an understanding of the principles of the invention, reference will now be made to the embodiment illustrated in the drawings. Specific language will be used to describe same. It will, nevertheless, be understood that no limitation of the 20 scope of the invention is thereby intended, such 4 alternations and further modifications in the illustrated device, and such further applications of the principles of the invention as illustrated herein being contemplated as would normally occur to one skilled in the art to which 5 the invention relates.

With reference to the drawings and in particular to FIGS. 1 and 2 thereof, the present invention mainly comprises a main crankshaft 4, an auxiliary crankshaft 1, a gear 2, a gear ring 3, a housing 5, a piston assembly 6, and a connecting rod 61.

The auxiliary crankshaft 1 includes an upper axle 11 and a lower axle 12. The upper axle 11 is connected with the piston assembly 6 via a connecting rod 61. The gear 2 is fixedly mounted on the lower axle 12 of the auxiliary crankshaft 1. The upper axle 11 of the auxiliary crankshaft 1 has a center line tangent to the pitch circle of the gear 2.

The gear ring 3 is fixedly installed within a cavity of the housing 5 by screws 51 or the like. The gear 2 is engaged with the gear ring 3. The gear ratio of the gear 2 to the gear ring 3 is 2:3.

The main crankshaft 4 is fitted within the cavity of the housing 5 and supported by a bearing 41. The main crankshaft 4 is formed with an eccentric recess 42 in which is fitted a bearing 421. The lower axle 12 of the auxiliary crankshaft 1 is supported by the bearing 421.

Looking now at FIGS. 3 and 4, the rotating radius X of the main crankshaft 4 is just equal to one-half of the rotating radius Y of the auxiliary crankshaft 11. In addition, the center line of the upper axle 11 of the auxiliary crankshaft 1 is tangent to the pitch circle of the gear 2. Further, the lower axle 12 is concentric with the eccentric recess 42 of the main crankshaft 4. Moreover, the gear ratio of the gear 2 to the gear ring 3 is 2:3. Accordingly, when the gear 2 rotates through an angle of 180 degrees in clockwise direction (with respect to FIG. 3), the gear 2 will move from the highest point A to the lowest point B of the gear ring 3 while the auxiliary crankshaft I will rotate through an angle of 90 degrees in counterclockwise direction. As a result, the 6 piston assembly 6 is moved downward. When the gear 2 rotates through an angle of 360 degrees (see FIGS. 3 and 4) in clockwise direction, the gear 2 will move from the lowest point B to the highest point A, the main crankshaft 4 will rotate through an angle of 360 degrees, and the auxiliary crankshaft 1 will rotate through an angle of 180 degrees in counterclockwise direction. Hence, the auxiliary crankshaft 1 will be moved to the lowest position, while the gear 2 will be moved upward, thereby keeping the piston assembly 6 at a fixed position. When the gear 2 rotates through an angle of 540 degrees in clockwise direction, the main crankshaft 4 will also rotate through an angle of 540 degrees. Meanwhile, the gear 2 will move from the highest point A to the lowest point B of the gear ring 3 and the auxiliary crankshaft will rotate through an angle of 270 degrees in counterclockwise direction thereby further keeping the piston assembly 6 at a fixed position. When the gear 2 rotates through an angle of 720 degrees in clockwise direction, the main crankshaft 4 will also rotate through 7 an angle of 720 degrees and the gear 2 will move from the highest point A to the lowest point B of the gear ring 3, and the auxiliary crankshaft I will rotate through an angle of 360 degrees in counterclockwise direction.

Hence, the piston assembly 6 will stop once after having moved up and down every time thereby enabling the cylinder to intake air and cool sufficiently and therefore increasing the volume efficiency. In addition, when the piston assembly 6 stays at the stop stroke, the gear 2 will still rotate without loading so that a large amount of energy will be stored in the piston assembly 6 which will increase the efficiency of the cylinder.

The invention is naturally not limited in any sense to the particular features specified in the forgoing or to the details of the particular embodiment which has been chosen in order to illustrate the invention. Consideration can be given to all kinds of variants of the particular embodiment which has been described by way of example and of its constituent elements without thereby departing from the scope of the invention. This invention accordingly includes all the means constituting technical equivalents of the means described as well as their combinations.

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Claims

I CLAIM:

1. A cylinder having a piston assembly capable of stopping once when having moved up and down every time comprising:

a housing having a cavity; gear ring fixedly within the cavity of said housing; main crankshaft fitted within the cavity of said housing and provided with an eccentric recess; gear meshed with said gear ring; an auxiliary crankshaft including an upper axle and a lower axle, said upper axle being connected with a piston assembly via connecting rod and having a center tanget to a pitch circle of said gear, said lower axle being pivotally connected with the eccentric recess of said main crankshaft; said gear meshed with said gear ring and fixedly mounted on the lower axle of said auxiliary crankshaft and having gear ratio of 2:3 to said gear ring.

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2. A cylinder having a piston assembly capable of stopping once it has moved up and down, substantially as herein described with reference to the accompanying drawings.