VARIABLE DISPLACEMENT MECHANISM OUTPUT MOVEMENT OF WHICH CAN BE LOWERED TO ZERO STROKE

Abstract

The invention is about a mechanical system (13), for obtaining variable displacement output movement of which can be lowered to even zero stroke which is driven by input-1 (11) and controlled by input-2 (12), produce variable displacement on ram-1 (6); and it is characterized in that it comprises Eccentric Shaft-1 (1) constrained to the frame by a joint (Y1), actuated by Input-1 (11), and produce force on joint (Y2) on the other end; Connection Rod-1 (2) constrained to said Eccentric Shaft-1 (1) on joint (Y2), and transmits force to joint (Y3) on the other end; Eccentric Shaft-2 (3) constrained to said Connection Rod-1 (2) by a joint (Y3) and constrained to frame by a joint (Y4), and transmits force to guide way bearing (Y6) on the other end; Sliding Pin (4) constrained to said Eccentric Shaft-2 (3) by guide way bearing (Y6), and transmits force on joint (Y5) on the other end; Connection Rod-2 (5) constrained to said Sliding Pin (4) by a joint (Y5), and transmits force on joint (Y9) on the other end; Ram-1 (6) constrained to said second Connection Rod-2 (5) by a joint (Y9)—and constrained to the frame by a guide way bearing (Y10), and outputs motion and force (and/or torque); Ram-2 (8) constrained to the frame by a guide way bearing (Y8), actuated by Input-2 (12), and transmits force on joint (Y7); Connection Rod-3 (7) constrained to said Ram-2 (8) and constrained to said Sliding Pin (4) on the other end by a joint (Y5), and transmits force on joint (Y5); Pin-1 (9) constrained to said Ram-2 (8) and Connection Rod-3 (7) by joint (Y7); and Pin-2 (10) constrained to said Ram-1 (6) and Connection Rod-2 (5) by joint (Y9).

Claims

1. A mechanical system (13), which is driven by input-1 (11), controlled by input-2 (12), and produce variable displacement on ram-1 (6) such that this output displacement can even be reduced to zero, the mechanical system comprising: an Eccentric Shaft-1 (1) constrained to the frame by a joint (Y1), and produce force on joint (Y2) on the other end; a Connection Rod-1 (2) constrained to said Eccentric Shaft-1 (1) on joint (Y2), and transmits force to joint (Y3) on the other end; an Eccentric Shaft-2 (3) constrained to said Connection Rod-1 (2) by a joint (Y3) and constrained to frame by a joint (Y4), and transmits force to guide way bearing (Y6) on the other end; a Sliding Pin (4) constrained to said Eccentric Shaft-2 (3) by guide way bearing (Y6), and transmits force on joint (Y5) on the other end; a Connection Rod-2 (5) constrained to said Sliding Pin (4) by a joint (Y5), and transmits farce on joint (Y9) on the other end; a Ram-1 (6) constrained to said second Connection Rod-2 (5) by a joint (Y9)—and constrained to the frame by a guide way bearing (Y10); a Ram-2 (8) constrained to the frame by a guide way bearing (Y8), and transmits force on joint (Y7); a Connection Rod-3 (7) constrained to said Ram-2 (8) and constrained to said Sliding Pin (4) on the other end by a joint (Y5), and transmits force on joint (Y5): a Pin-1 (9) constrained to said Ram-2 (8) and Connection Rod-3 (7) by joint (Y7); a Pin-2 (13) constrained to said Ram-1 (6) and Connection Rod-2 (5) by joint (Y9). an Input-1 (11) exerted on Eccentric Shaft-1 (1), or Ram-1 (6), or Ram-2 (8). an Input-2 (12) exerted on Eccentric Shaft-1 (1), or Ram-1 (6), or Ram-2 (8).

2. The mechanical system (13) according to claim-1, characterized in that; Input-1 (11) is transferred to Eccentric Shaft-1 (1). Input-2 (12) is transferred to Ram-2 (8).

3. The mechanical system (13) according to claim-1, characterized in that, said Input-1 (11) and Input-2 (12) devices are manual or motor or mechanical or electric-electronic or hydraulic/pneumatic or magnetic or piezo-electric based elements or any means.

4. The mechanical system (13) according to claim-1, characterized in that: the shape of trajectory of guide ways Y8 or Y10 can be straight line or pure circular arc or spline of any mathematical function.

5. The mechanical system (13) according to claim-1, characterized in that, linear motion or angular motion or any combination of these two, as well as force or torque or any combination of these two is obtained as an output depending on the structure of path of Guide way bearing of Ram-1 (6) on frame (Y10).

6. The mechanical system (13) according to claim-1, characterized in that; a link with revolute joints in both ends can be replaced with Ram-1 (6) required that said link is constrained to the frame by joint in one end and constrained to the Connection Rod-2 (5) by joint on the other end.

7. The mechanical system (13) according to claim-1, characterized in that; a link with revolute joints in both ends can be replaced with Ram-2 (8) required that said link is constrained to the frame by joint in one end and constrained to the Connection Rod-3 (7) by joint on the other end.

8. A method of obtaining variable displacement output movement of which can be even lowered to zero stroke, and variable force (and/or torque) which can be even increased to infinity, characterized in that; Eccentric Shaft-1 (1) turns more than 360 degrees: Eccentric Shaft-2 (3) oscillates back and forth in angular motion, the distance between axis A4 and A5 (measure of eccentricity-3) (e3) is determined by the distance between axis A5 and A7 (length of Connection Rod-3 (7)), and the location of Axis A7 on Ram-2 (8) which is determined by Input-2 (12). measure of eccentricity-3 (e3) is determined by Input-2 (12) transferred to Ram-2 (8). as axis AS come close to axis A4 through guide way bearing (Y6), the distance in between (measure of eccentricity-3 (e3)) can be even reduced to zero.

9. The method according to claim-8, characterized in that, sliding Pin (4) oscillates back and forth in angular motion in accordance with Eccentric Shaft-2 (3). The magnitude of oscillation depends on the measure of eccentricity-3 (e3), and as ‘e3” approaches to zero, the magnitude of this oscillation goes to zero

10. The method according to claim-8 and characterized in that; Input-2 (12) can be exerted on Ram-1 (6), thus, above described output displacement and force (and/or torque) can be obtained on Ram-2 (8).

11. The method according to claim-8 characterized in that, Input-2 (12) can be exerted on Eccentric Shaft-1 (1), thus, above described output displacement and force (and/or torque) can be obtained on Ram-1 (6) and/or Ram-2 (8).

12. The method according to claim-8 characterized in that Input-1 (11) and Input-2 (12) can be exerted Ram-1 (6) and Ram-2 (8) respectively, or vice or versa, thus output can be obtained on Eccentric Shaft-1 (1) required that Input-1 (11) is appropriate with the structure of guide way bearings Y8 or Y10.

13. The method according to claim-8 characterized in that, Input-1 (11) can be of constant or varying speed and/or torque in the course of mechanism working. The input power can be constant or varying in the course of mechanism working.

14. The method according to claim-8 characterized in that, motion range of Input-1 (11) can be smaller than one tour (360 degrees).

15. The method according to claim-8 characterized in that, motion and/or torque of Input-1 (11) can be oscillatory.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0019] FIG. 1: Schematic perspective view of the mechanical system (presented invention)

TABLE-US-00001 Reference Numbers No Explanation  1 Eccentric Shaft-1  2 Connection Rod-1  3 Eccentric Shaft-2  4 Sliding Pin  5 Connection Rod-2  6 Ram-1  7 Connection Rod-3  8 Ram-2  9 Pin-1 10 Pin-2 11 Input-1 12 Input-2 13 Variable Displacement Mechanism Output Movement of Which Can Be Lowered to Zero Stroke (SSDDM) Y1 Joint of Eccentric Shaft-1 on frame Y2 Joint of Connection Rod-1 on Eccentric Shaft-1 Y3 Joint of Eccentric Shaft-2 on Connection Rod-1 Y4 Joint of Eccentric Shaft-2 on frame Y5 Joint of Sliding Pin on Connection Rod-2 and Connection Rod-3 Y6 guide way bearing of Sliding Pin on Eccentric Shaft-2 Y7 Joint of Pin-1 on Ram-2 Y8 Guide way bearing of Ram-2 on frame Y9 Joint of Pin-2 on Ram-1 Y10 Guide way bearing of Ram-1 on frame A1 Axis of joint Y1 A2 Axis of joint Y2 A3 Axis of joint Y3 A4 Axis of joint Y4 A5 Axis of joint Y5 A5 Axis of joint Y9 A7 Axis of joint Y7 e1 Distance between axis A1 and A2 (measure of eccentricity-1) e2 Distance between axis A3 and A4 (measure of eccentricity-2) e3 Distance between axis A4 and A5 (measure of eccentricity-3)

DETAILED DESCRIPTION OF THE INVENTION

[0020] The invention is about a mechanical system (13), which is driven by input-1 (11) and controlled by input-2 (12), produce variable displacement on ram-1 (6) such that this output displacement can even be reduced to zero; and it is characterized in that it comprises Eccentric Shaft-1 (1) constrained to the frame by a joint (Y1), actuated by Input-1 (11), and transmits force on joint (Y2) on the other end; Connection Rod-1 (2) constrained to said Eccentric Shaft-1 (1) on joint (Y2), and transmits force to joint (Y3) on the other end; Eccentric Shaft-2 (3) constrained to said Connection Rod-1 (2) by a joint (Y3) and constrained to frame by a joint (Y4), and transmits force to guide way bearing (Y6) on the other end; Sliding Pin (4) constrained to said Eccentric Shaft-2 (3) by guide way bearing (Y6), and transmits force on joint (Y5) on the other end; Connection Rod-2 (5) constrained to said Sliding Pin (4) by a joint (Y5), and transmits force on joint (Y9) on the other end; Ram-1 (6) constrained to said second Connection Rod-2 (5) by a joint (Y9)—and constrained to the frame by a guide way bearing (Y10), and outputs motion and force (and/or torque); Ram-2 (8) constrained to the frame by a guide way bearing (Y8), actuated by Input-2 (12), and transmits force on joint (Y7); Connection Rod-3 (7) constrained to said Ram-2 (8) by a joint (Y7) and constrained to said Sliding Pin (4) on the other end by a joint (Y5), and transmits force on joint (Y5); Pin-1 (9) constrained to said Ram-2 (8) and Connection Rod-3 (7) by joint (Y7); and Pin-2 (10) constrained to said Ram-1 (6) and Connection Rod-2 (5) by joint (Y9).

[0021] Torque supplied by Input-1 (11) via manual or motor or any input means is transferred to Eccentric Shaft-1 (1). Eccentric Shaft-1 (1) is free to turn 360 degrees. Force transmitted through Connection Rod-1 (2) is converted to torque on Eccentric Shaft-2 (3). Eccentric Shaft-2 (3) oscillates back and forth in angular motion. The oscillation range of Eccentric Shaft-2 (3) is defined by appropriate determination of variables of the distance between axis A1 and A2 (measure of eccentricity-1) (e1), the distance between axis A1 and A3, and the distance between axis A3 and A4 (measure of eccentricity-2) (e2).

[0022] The distance between axis A4 and A5 (measure of eccentricity-3) (e3) is determined by the distance between axis A5 and A7 (length of Connection Rod-3 (7)), and the location of Axis A7 on Ram-2 (8) which is determined by Input-2 (12). Thus, measure of eccentricity-3 (e3) is determined by force supplied by Input-2 (12) via manual or motor or any input means, and transferred to Ram-2 (8).

[0023] As axis A5 come close to axis A4 through guide way bearing (Y6), the distance in between (measure of eccentricity-3 (e3)) can be even reduced to zero.

[0024] The torque on Eccentric Shaft-2 (3) is converted to force on Sliding Pin (4), thanks to the distance between axis A4 and A5 (measure of eccentricity-3) (e3).

[0025] Converted force on Sliding Pin (4) depends on measure of eccentricity-3 (e3); and when “e3” approaches to zero, the magnitude of this force goes to infinity.

[0026] Sliding Pin (4) oscillates back and forth in angular motion in accordance with Eccentric Shaft-2 (3). The magnitude of oscillation depends on the measure of eccentricity-3 (e3) which is determined by Input-2 (12) as explained above; and when “e3” approaches to zero, the magnitude of this oscillation goes to zero.

[0027] Besides, measure of eccentricity-3 (e3) changes slightly when Eccentric Shaft-2 (3) oscillates. When Eccentric Shaft-2 (3) oscillates the change measure of eccentricity-3 (e3) can be kept negligible by appropriate determination of length of mechanism members and distances between axis Y1 and axis Y3.

[0028] Force on Sliding Pin (4) is transmitted to Ram-1 (6) through Connection Rod-2 (5), and force or torque or any combination of these two is obtained as an output depending on the structure of path of Guide way bearing of Ram-1 on frame (Y10). It is clear that when the measure of eccentricity-3 (e3) is closed to zero, the magnitude of output displacement of Ram-1 (6) gets close to zero, and the magnitude of force (and/or torque) output of Ram-1 (6) goes to infinity.

[0029] Alternative Applications

[0030] Input-2 (12) can be exerted on Ram-1 (6), thus, above described output displacement and force (and/or torque) can be obtained on Ram-2 (8).

[0031] Input-2 (12) can be exerted on Eccentric Shaft-1 (1), thus, above described output displacement and force (and/or torque) can be obtained on Ram-1 (6) and/or Ram-2 (8).

[0032] Input-1 (11) and Input-2 (12) can be exerted Ram-1 (6) and Ram-2 (8) respectively, or vice or versa, thus output can be obtained on Eccentric Shaft-1 (1) required that Input-1 (11) is appropriate with the structure of guide way bearings Y8 or Y10.

[0033] A link(s) with revolute joints in both ends can be replaced with one or two of Ram-1 (6) or Ram-2 (8), required that said link(s) is (are) constrained to the frame by joint(s) in one end(s) and constrained to the Connection Rod-2 (5) and/or Connection Rod-3 (7) by joint(s) on the other end(s).

[0034] The shape of trajectory of guide ways Y8 or Y10 can be straight line or pure circular arc or spline of any mathematical function.

[0035] Input-1 (11) can be of constant or varying speed and/or torque in the course of mechanism working. The input power can be constant or varying in the course of mechanism working.

[0036] Motion range of Input-1 (11) can be smaller than one tour (360 degrees).

[0037] Motion and/or torque of Input-1 (11) can be oscillatory.