Title:
Twin piston power transmission mechanism with a bent link
Kind Code:
A1


Abstract:
A twin piston power transmission mechanism with a bent link, the end of the link connecting with a cylinder is a bent arm, the link has thereon for a first piston rod and a second piston rod each a bushing hole to respectively mount a main piston and a secondary piston of a piston set, the bushing hole for the first piston rod is deviated from the shank of the link; a movable connecting piece is provided between the bushing hole for the first piston rod and the main piston to make connection of the piston with the link; when the piston is raised to an upper dead point, the accelerating power at the beginning of lowering the piston will generate a component force in a tangential direction of biased circular motion of a driving wheel by deviation of the bushing hole for the first piston rod from the shank of the link. Thereby, the driving wheel immediately obtains an accelerating power in the tangential direction, and running of the driving wheel can be smoother; power of the piston set can thus be completely developed.



Inventors:
Tsai, Hui-cheng (Taipei, TW)
Application Number:
10/022447
Publication Date:
06/26/2003
Filing Date:
12/20/2001
Assignee:
TSAI HUI-CHENG
Primary Class:
International Classes:
F02B75/04; F02B75/28; F02B75/32; F02F3/00; F16H21/34; F16J1/14; F16J1/16; (IPC1-7): F01B9/00
View Patent Images:
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Primary Examiner:
LAZO, THOMAS E
Attorney, Agent or Firm:
BACON & THOMAS, PLLC (ALEXANDRIA, VA, US)
Claims:
1. A twin piston power transmission mechanism with a bent link, said link connects a driving wheel with a piston, when said piston bears internal pressure of a cylinder to run said piston to and fro, its power turns the reciprocating linear movement of said piston into a rotating movement of said driving wheel through said link; said mechanism is characterized by: an end of said link in connecting with said cylinder is designed to be in the form of a bent arm, so that a bushing hole provided for a piston rod to receive a piston on said end of said link is arranged to be a suitable angle deviated from said shank of said link; a movable connecting piece is provided between said bushing hole for said piston rod and said piston to make connection of said piston with said link, so that said link has a swinging action against said piston when said driving wheel is rotated; and when said piston is raised to its upper dead point, accelerating power at the beginning of lowering said piston generates a component force in a tangential direction of biased circular motion of said driving wheel by deviation of said bushing hole for said piston rod from said shank of said link, thereby, said driving wheel immediately obtains an accelerating power in said tangential direction of said circular motion, and running of said driving wheel is smoother; power of said piston can thus be completely developed.

2. A twin piston power transmission mechanism with a bent link, said link connects a driving wheel with a piston set including two pistons, i.e., a main piston and a secondary piston, when said piston set bears internal pressure of a cylinder to run said piston set to and fro, its power turns the reciprocating linear movement of said piston set into a rotating movement of said driving wheel through said link; said mechanism is characterized by: an end of said link in connecting with said cylinder is designed to be in the form of a bent arm, a bushing hole for a first piston rod and a bushing hole for a second piston rod are provided on said link to allow respectively mounting of said main piston and said secondary piston, said bushing hole for said first piston rod is arranged a suitable angle deviated from said shank of said link; a movable connecting piece is provided between said bushing hole for said first piston rod and said main piston to make connection of said main piston with said link; and said main piston on the upper portion of said piston set accepts or transmits power when pressure in said cylinder changes, while said secondary piston on the lower portion of said piston set is a hollow piston used to allow extending of said link therethrough and to swing about said second piston rod of said secondary piston, so that said secondary piston forms a steady link swinging action; and when said piston set is raised to its upper dead point, accelerating power at the beginning of lowering said piston set generates a component force in a tangential direction of biased circular motion of said driving wheel by deviation of said bushing hole for said first piston rod from said shank of said link, thereby, said driving wheel immediately obtains an accelerating power in said tangential direction of said circular motion, and running of said driving wheel is smoother; power of said piston set can thus be completely developed.

3. A twin piston power transmission mechanism with a bent link as in claim 1, wherein, a bushing hole for mounting a connecting piece is provided on said piston in a deviated way, so that when said piston is raised to its upper dead point, said connecting piece between said piston and said link is parallel to the action direction of said piston, thereby, when said piston is lowered, said component force of said accelerating power is generated on one side of said driving wheel to be able to forwardly run said driving wheel.

4. A twin piston power transmission mechanism with a bent link as in claim 2, wherein, a bushing hole for mounting said connecting piece is provided on said main piston in a deviated way, so that when said piston set is raised to its upper dead point, said connecting piece between said main piston and said link is parallel to the action direction of said piston, thereby, when said piston set is lowered, said component force of said accelerating power is generated on one side of said driving wheel to be able to forwardly run said driving wheel.

5. A twin piston power transmission mechanism with a bent link as in claim 1, wherein, said cylinder and the axis of said driving wheel are arranged in a mutually deviated mode, so that when said piston is raised to said upper dead point, said shank of said link is not aligned with the direction of movement of said piston nor with said axis of said driving wheel, thereby damage rate of said link is lowered.

6. A twin piston power transmission mechanism with a bent link as in claim 2, wherein, strokes of movements of said main piston and said secondary piston in said cylinder are separated into different sections to suitably make a deviation between said main and said secondary pistons, so that the action directions of said main piston and said secondary piston are not in an identical axis, hence abrasion on the inner wall of said cylinder is reduced, and boring operation for said different sections with different degrees of abrasion is separately carried on to lower cost of maintaining said cylinder.

Description:

BACKGROUND OF THE INVENTION

[0001] 1. Field of the Invention

[0002] The present invention is related to a twin piston power transmission mechanism with a bent link, and especially to such a transmission mechanism of which the initial accelerating power of lowering pistons can generate a component force along the tangential direction of biased circular motion of a driving wheel, so that the driving wheel can immediately obtain a tangential accelerating power on the circle of the circular motion, and running of the driving wheel can be smoother. Such a transmission mechanism not only can completely develop the power of the pistons, but also can reduce damage of a link.

[0003] 2. Description of the Prior Art

[0004] The mode of power generation of a conventional internal combustor has a cylinder as a place to burn mixed gas; and has a piston to run to and fro in the cylinder, a spark plug is provided above the cylinder for igniting the mixed gas, an inlet port and an exhausting port are provided in the cylinder, a link is provided on the bottom of the cylinder to connect the piston and a driving wheel. Wherein, the driving wheel is a component for outputting power of the internal combustor; the power can change the reciprocating linear movement of the piston into a rotating movement of the driving wheel through the link.

[0005] By the fact that the link is used to change the linear movement of a piston into a rotating movement of the driving wheel, when the engine is running, under up and down motion of the piston, the link continuously accelerates and decelerates, and especially makes an upward sudden deceleration to stop the motion of the link when the piston reaches a dead point, and changes the direction of movement immediately; and when the link moves to the dead point, the axis of the shank of the link is aligned with the direction of movement of the piston and the axis of the driving wheel, at this time, it is most easily to have the link damaged. Therefore, in designing an internal combustor, generally a weight is provided on the driving wheel in order that the driving wheel creates an inertia effect during rotation to bring the link away to be deviated a suitable angle from the direction of movement of the piston when the piston is raised to its upper dead point; and the ignition time is controlled to render an accelerating power to generate after the deviation of the link from the direction of movement of the piston this suitable angle. Thereby, the driving wheel can run normally, and the link can avoid direct damage.

[0006] However, the ignition time of the internal combustor is controlled at the moment of the deviation of the link from the direction of movement of the piston this suitable angle, at this time, the piston has been lowered a slight distance of its stroke, hence the best compression ratio (the quotient of the total volume of the cylinder when the piston is at the dead point over the total volume of the chamber of the combustor when the piston is at the dead point) can not be obtained, and thereby, the piston is unable to completely develop its whole stroke; additionally in practice, control of the ignition time is more difficult.

SUMMARY OF THE INVENTION

[0007] In view of this, in the twin piston power transmission mechanism with a bent link of the present invention, the end of the link in connecting with a cylinder is designed to be in the form of a bent arm, so that a bushing hole for a piston rod to receive a piston on the end of the link is arranged to be a suitable angle deviated from the shank of the link; a movable connecting piece is provided between the bushing hole for the piston rod and the piston to make connection of the piston with the link, so that the link can have a swinging action against the piston when the driving wheel is rotated; and when the piston is raised to its upper dead point, the accelerating power at the beginning of lowering of the piston will generate a component force in the tangential direction of the biased circular motion of the driving wheel by deviation of the bushing hole for the piston rod from the shank of the link. Thereby, the driving wheel can immediately obtain an accelerating power in the tangential direction of the circular motion, and running of the driving wheel can be smoother; power of the piston can thus be completely developed, and this is the primary object of the present invention.

[0008] Another object of the twin piston power transmission mechanism with a bent link of the present invention is to provide a piston set structure with two pistons on the end of the link in connecting with the cylinder, and the link is provided with a bushing hole for a first piston rod and a bushing hole for a second piston rod to allow respectively mounting of the main piston and a secondary piston of the piston set. Wherein, the bushing hole for the first piston rod is arranged a suitable angle deviated from the shank of the link, and the main piston on the upper portion of the piston set accepts or transmits power when pressure in the cylinder changes, while the secondary piston on the lower portion of the piston set is a hollow piston used to allow extending of the link therethrough and can swing about the second piston rod of the secondary piston, so that the secondary piston can form a steady link swinging action.

[0009] Another object of the twin piston power transmission mechanism with a bent link of the present invention is to arrange a bushing hole for mounting a connecting piece provided on the main piston in a deviated way, so that when the piston set is raised to its upper dead point, the connecting piece between the main piston and the link is parallel to the action direction of the piston. Thereby, when the piston set is lowered, the component force of the accelerating power can be generated on one side of the driving wheel to be able to forwardly run the driving wheel.

[0010] A further object of the twin piston power transmission mechanism with a bent link of the present invention is to arrange the cylinder and the axis of the driving wheel in a mutually deviated mode, so that when the piston set is raised to its upper dead point, the shank of the link is not aligned with the direction of movement of the piston set nor with the axis of the driving wheel, thereby damage rate of the link can be lowered.

[0011] Another object of the twin piston power transmission mechanism with a bent link of the present invention is to separate the strokes of the movements of the main piston and the secondary piston in the cylinder into different sections and suitably make a deviation between the two, so that the action directions of the main piston and the secondary piston will not be in an identical axis, hence abrasion on the inner wall of the cylinder can be reduced. And boring operation for the different sections with different degrees of abrasion can be separately carried on to lower cost of maintaining the cylinder.

[0012] The present invention will be apparent after reading the detailed description of the preferred embodiment thereof in reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

[0013] FIG. 1 is a perspective view showing the structure of the present invention;

[0014] FIG. 2 is an analytical perspective view showing the structure of the present invention;

[0015] FIG. 3 is a sectional view showing the structure of the present invention;

[0016] FIG. 4 is a schematic view showing the piston of the present invention at the upper dead point thereof;

[0017] FIG. 5 is a sectional view showing the structure of another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[0018] Referring firstly to FIG. 1, the twin piston power transmission mechanism with a bent link of the present invention is a mechanism used to turn running to and fro of a piston set 4 in a cylinder 1 under the internal pressure of the cylinder 1 into a rotating movement. Wherein, a link 3 is used to connect a driving wheel 2 and the piston set 4, so that when the piston set 4 bears the internal pressure of the cylinder 1 and moves to and fro in the cylinder 1, its power can change the reciprocating linear movement into the rotating movement of the driving wheel 2 through the link 3.

[0019] Referring simultaneously to FIGS. 2 and 3, the end of the link 3 in connecting with the cylinder 1 is designed to be in the form of a bent arm, and has a structure of piston set 4 having two pistons. The end of the link 3 to be in the form of a bent arm is provided with a bushing hole 31 for a first piston rod to receive a main piston 41 and with a bushing hole 32 for a second piston rod to receive a secondary piston 42 respectively. The bushing hole 31 for the first piston rod is arranged to be a suitable angle deviated from the shank of the link 3, while a movable connecting piece 33 is provided between the bushing hole 31 for the first piston rod and the main piston 41 to make connection of the main piston 41 with the link 3. The two ends of the connecting piece 33 respectively allow extending of a piston rod 43 into the bushing hole 31 for the first piston rod of the link 3 and allow extending of another piston rod 43 into a bushing hole 411 of the connecting piece 33, so that the driving wheel 2 can have a swinging action against the main piston 41 when the driving wheel 2 is rotated. And the main piston 41 accepts or transmits power when pressure in the cylinder 1 changes. The secondary piston 42 on the lower portion of the piston set 4 similarly allows the other piston rod 43 to extend into the bushing hole 32 of the link 3, it is a hollow annular block used to allow extending of the link 3 therethrough and swinging about the second piston rod 43 of the secondary piston 42, so that the secondary piston 42 can form a steady link swinging action. As shown in FIG. 4, when the piston set 4 is raised to its upper dead point, an accelerating power at the beginning of lowering of the main piston 41 will generate a component force in a tangential direction of the biased circular motion of the driving wheel 2 by deviation of the bushing hole 31 for the first piston rod from the shank of the link 3. Thereby, the driving wheel 2 can immediately obtain an accelerating power in the tangential direction of the circular motion, and running of the driving wheel 2 can be smoother; and power of the piston set 4 can be completely developed.

[0020] And more, in the present invention, the bushing hole 411 on the main piston 41 for the connecting piece 33 is arranged to be deviated, so that when the piston set 4 is raised to its upper dead point, the connecting piece 33 between the main piston 41 and the link 3 is parallel to the action direction of the piston set 4. Thereby, when the main piston 41 is lowered, the component force of the accelerating power can be generated on one side of the driving wheel 2 to be able to forwardly run the driving wheel 2. And the cylinder 1 and the axis of the driving wheel 2 are arranged in a mutually relatively deviated mode, so that when the piston set 4 is raised to its upper dead point, the shank of the link 3 is not aligned with the direction of movement of the piston set 4 nor with the axis of the driving wheel 2, thereby damage rate of the link 3 can be lowered. Further as shown in FIG. 5, the strokes of the movements of the main piston 41 and the secondary piston 42 in the cylinder 1 can be separated into different sections to suitably make a deviation between the two pistons, so that the action directions of the main piston 41 and the secondary piston 42 will not be in an identical axis, hence abrasion on the inner wall of the cylinder 1 can be reduced. And boring operation for the different sections with different degrees of abrasion can be separately carried on to lower cost of maintaining the cylinder.

[0021] The twin piston power transmission mechanism with a bent link of the present invention makes the end of the link in connecting with the cylinder designed be in the form of a bent arm, so that the bushing hole for a first piston rod to receive the main piston on the end of the link is arranged to be a suitable angle deviated from the shank of the link; a movable connecting piece is provided between the bushing hole for the first piston rod and the main piston to make connection of the main piston with the link, so that the driving wheel can have a swinging action against the main piston when the driving wheel is rotated, and when the piston is raised to its upper dead point, the accelerating power at the beginning of lowering of the piston will generate a component force in the tangential direction of the biased circular motion of the driving wheel by deviation of the bushing hole for the first piston rod from the shank of the link. Thereby, the driving wheel can immediately obtain an accelerating power in a tangential direction of the circular motion, and running of the driving wheel can be smoother; power of the piston set can thus be completely developed, and this provides the preferred power transmission mechanism of the present invention. Having thus described my invention, what I claim as new and desire to be secured by Letters Patent of the United States are: