WO2013063757A1

WO2013063757A1 - Driving apparatus and variable stroke and timing pressure control system

Info

Publication number: WO2013063757A1
Application number: PCT/CN2011/081623
Authority: WO
Inventors: 刘邦健
Original assignee: Lio Pang-Chian
Priority date: 2011-11-01
Filing date: 2011-11-01
Publication date: 2013-05-10

Abstract

Provided is a driving apparatus (50), comprising a drive component (51) having an input shaft (511) and at least one grooved cam (513, 514); a driven component (52) connected to the drive component (51) and driven by the drive component (51); a parallel shaft (53) connected to the driven component (52) and driven by the drive component (51); a parallel-axis fixing component (54) connected to the driven component (52); a central shaft (531) connected to the parallel shaft (53) and an output shaft (56) moving with the central shaft (531); and a pushing mechanism (55) connected to the parallel-axis fixing component (54) and for pushing the parallel-axis fixing component (54) to move by a pushed distance to drive the parallel movement of the driven component (52) and the parallel shaft (53). Further provided is a variable stroke and timing pressure control system comprising the driving apparatus. The driving apparatus and the variable stroke and timing pressure control system use a buffer apparatus for pressure control in the pipes, enabling dynamic stroke to be achieved, and timing and applied pressure to be variable.

Description

Drive unit and variable stroke timing pressure control system

Technical field

The present invention relates to a pressure control system and a drive device, and more particularly to a drive device and a variable stroke timing pressure control system. Background technique

The existing design, such as the application of the opening and closing of the engine door, is mostly caused by the overhead camshaft directly or through the rocker arm to indirectly press the valve ejector, and then the return spring closes the valve, which is a proximal control mechanism design. In order to achieve variable control of timing, travel and timing, it is necessary to configure a complex mechanism design, so there are problems such as heat dissipation, lubrication, and limited space (increase total volume). Summary of the invention

A first object of the present invention is to provide a driving device that can perform an additional angular rotation in the case of synchronous rotation.

In order to achieve the above object, the present invention adopts the following technical solutions:

A driving device of the present invention includes: a transmission member, a follower member, a parallel shaft, a parallel shaft fixing member, and a pushing device. The transmission member has an input shaft and at least one grooved cam. The follower is coupled to the transmission member and is driven by the transmission member. The follower member has at least one cam follower bump disposed correspondingly in the at least one grooved cam. The parallel shaft connects the follower and is driven by the transmission member. The parallel shaft mount connects the follower. The pushing device is coupled to the parallel shaft fixing member for pushing the parallel shaft fixing member to move a pushing distance to drive the follower member to move parallel to the parallel shaft, so that the at least one cam is driven to protrude from the at least one groove Move inside the grooved cam.

The parallel shaft fixing member is pushed by the pushing device to displace the follower, so that the cam follower protrusion of the follower is restricted by the groove cam of the transmission member, so that the follower rotates synchronously At the speed, the fixed angle is accurately adjusted by the pushing device and the grooved cam. When an additional rotation change is made at a certain angle according to the demand, the function of timing can be achieved.

Another object of the present invention is to provide a variable stroke timing pressure control system that achieves a dynamic stroke (Stroke), a timing (Time Duration), and a variable pressure (Pressure).

A variable stroke timing pressure control system of the present invention comprises: at least one driving device, at least one active fluid a pressure cylinder, at least one pipeline, a first buffer device, and an action hydraulic cylinder. The at least one driving device has a plurality of operating time zones, and the driving device of the present invention can be reconnected to the remote hydraulic system, and can be applied to the variable stroke timing pressure control system of the present invention. At least one of the active hydraulic cylinders has at least one active piston driven by at least one of the driving devices, that is, an output shaft of the driving device is coupled to the driving cam to drive the active piston of the active hydraulic cylinder, according to the action time zone, One of the active pistons is capable of correspondingly moving a plurality of drive displacements. At least one of the conduits connects at least one of the active hydraulic cylinders, the conduit having a liquid therein. The first buffer device is connected to at least one of the pipelines, and the first buffer device is driven to move by a first set distance by using a liquid. The actuating hydraulic cylinder is connected to at least one of the pipelines, and the actuating hydraulic cylinder has an actuating piston, and the actuating piston is moved by the liquid to move at least one action displacement according to the driving displacement and the first set distance.

In the variable stroke timing pressure control system of the present invention, the portion of the stroke timing pressure variable is a stroke and pressure control in the pipeline by the buffer device, and a dynamic stroke (Stroke) and timing (action time zone) can be achieved. Time duration and variable pressure are variable. Moreover, the variable stroke timing pressure control system of the present invention can achieve variable strokes with a relatively simple mechanism, without the need to utilize expensive and complex mechanisms as in the prior art. DRAWINGS

1A and 1B are schematic cross-sectional views showing a driving device of the present invention;

2A and 2B are schematic views showing a transmission member of a driving device of the present invention;

3A and 3B are schematic views showing a follower of the driving device of the present invention;

Figure 4 is a schematic view showing the parallel shaft of the driving device of the present invention;

Figure 5 is a schematic view showing a parallel shaft fixing member of the driving device of the present invention;

Figure 6 is a schematic view showing the output shaft of the driving device of the present invention;

Figure 7 is a schematic view showing the start of the no-action time zone of the variable-stroke timing pressure control system of the first embodiment of the present invention; Figure 8 is a view showing the end of the no-action time zone of the variable-stroke timing pressure control system of the first embodiment of the present invention; A schematic diagram showing a preparatory action time zone of the variable stroke timing pressure control system of the first embodiment of the present invention; FIG. 10 is a schematic view showing a pressurization action time zone of the variable stroke timing pressure control system of the first embodiment of the present invention; FIG. 12 is a schematic diagram showing a decompression action time zone of a variable stroke timing pressure control system according to a first embodiment of the present invention; FIG. 13 is a view showing a pressure reduction operation time zone of a variable stroke timing pressure control system according to a first embodiment of the present invention; FIG. 14 is a schematic view showing a variable stroke timing pressure control system according to a second embodiment of the present invention; and FIG. 14 is a schematic view showing a final stroke time control system of a variable stroke timing pressure control system according to a first embodiment of the present invention; Figure 15 is a schematic illustration of the cam of the variable stroke timing pressure control system of the present invention.

Description of the reference numerals:

10: Variable stroke timing pressure control system of the first embodiment of the present invention

11: First drive unit 12: Second drive unit 13: First active hydraulic cylinder

14: Second active hydraulic cylinder 15: First line 16: Second line

17: First buffer device 18: Action hydraulic cylinder 19: Second buffer device

21: third buffer device 22: timing action control device 23: first liquid storage tank

24: Second liquid storage tank 25: Stroke control unit

30: The variable line of the second embodiment of the present invention ■ The timing pressure control system

31: Drive unit 32: Active hydraulic cylinder 33: Piping

34: First buffer device 35: Action hydraulic cylinder 36: Second buffer device

37: Timing action control device 38: Liquid storage tank 39: Recovery spring

41: Stroke control device 50: Drive device of the present invention 51: Transmission member

52: Follower 53: Parallel shaft 54: Parallel shaft mount

55: Pusher 56: Output shaft 57: Differential bearing

131: : First active piston 141: Second active piston 181; : Action piston

511: : Input shaft 512: First ring 513, 514: Grooved cam

521, 522: cam follower bump 523: follower shaft 524; : second ring

531: : Center axis 533: End point 541; : Fixing nut

1A and 1B, which are schematic cross-sectional views showing a driving device of the present invention. The driving device 50 of the present invention comprises: a transmission member 51, a follower member 52, a parallel shaft 53, a parallel shaft fixing member 54 - a pushing device 55 and an output shaft 56.

Referring to Figures 2A and 2B, there are shown schematic views of the transmission member of the drive unit of the present invention. The transmission member 51 has an input shaft 511 and at least one grooved cam 513, 514. In the embodiment, the transmission member 51 further includes a first ring member 512 connected to the input shaft 511. The at least one grooved cam 513, 514 is disposed on the first ring member 512, the at least one groove The grooved cams 513, 514 are disposed obliquely (rotating and axially displaced) at an oblique angle to a central axis direction of the first ring member 512.

3A and 3B, which are schematic views showing the follower of the driving device of the present invention. Cooperate with reference to Figure 1A As shown in FIG. 3B, the follower 52 is coupled to the transmission member 51, and is driven by the transmission member 51. The follower member 52 has at least one cam follower bumps 521 and 522 disposed on the corresponding at least one grooved cam 513. 514. In this embodiment, the follower 52 further includes a driven shaft 523 and a second annular member 524. The driven shaft 523 is coupled to the second annular member 524. The at least one cam driven bump 521 and 522 are protruded from the driven shaft 523 , and the driven shaft 523 is disposed in the first ring 512 . The follower 52 has a hollow hole shape.

Referring to Figure 4, there is shown a schematic view showing the parallel axes of the drive unit of the present invention. Referring to Figures 1A through 4, the parallel shaft 53 passes through the follower 52, and the grooved cams 513, 514 of the transmission member 51 are coupled by the cam followers 521, 522, and the grounding is carried by the transmission member 51. The parallel shaft 53 has a central shaft 531 connected to the output shaft 56. In the present embodiment, the parallel shaft 53 is of a spline type, and the sleeve is disposed in the hollow hole of the follower 52. The central shaft 531 is passed through the sleeve, so that it can rotate along with the follower 52. Smooth and accurate axial parallel movement can still be done.

The parallel shaft 53 further includes an end point 533 disposed in the first ring member 512 and connected to the transmission member 51 by a fixed bearing (not shown), but may not rotate synchronously with the transmission member 51. , a mechanism that increases or decreases the angle of rotation.

Referring to Figure 5, there is shown a schematic view of a parallel shaft mount of the drive unit of the present invention. Refer to Figure 1A to Figure 5 for cooperation. In the present embodiment, the parallel shaft fixing member 54 is disposed in the parallel shaft fixing member 54 by a differential bearing 57. The inner ring of the differential bearing 57 is connected to the outer ring of the second annular member 524 of the follower member 52. . The parallel shaft fixing member 54 can be moved in the axially parallel position with the follower member 52, but does not rotate with the follower member 52.

Referring to FIG. 1A and FIG. 1B, the pushing device 55 is coupled to the parallel shaft fixing member 54 for pushing the parallel shaft fixing member 54 to move a pushing distance to drive the follower 52 to move parallel to the parallel shaft 53. The at least one cam follower bump 521 is angularly moved within the at least one grooved cam 513, for example, moved from the upper left position of the grooved cam 513 of FIG. 1A to the lower right of the grooved cam 513 of FIG. 1B. position. The pushing device 55 is driven by a motor or an electric motor after the demand is calculated by the calculator.

In the present embodiment, the pushing device 55 is a screw, and the parallel shaft fixing member 54 further includes a fixing nut 541 (Fig. 5) in conjunction with the screw. In other embodiments, cam linkage can be utilized to create displacement.

Referring to Figure 6, there is shown a schematic view of the output shaft of the drive unit of the present invention. Referring to FIGS. 1A, 1B, and 6, the driving device 50 of the present invention further includes an output shaft 56 to which the central axis 531 of the parallel shaft 53 is coupled, in conjunction with the central shaft 531. The kinetic energy is connected to the follower 52 via the transmission member 51, and the output shaft 56 is concentrically coupled with the parallel shaft 53, and the kinetic energy can be output from the output shaft 56, and then connected to the first driving device 11 (Figs. 7 to 13). (first cam) and second drive unit 12 (second cam). Therefore, with the driving device of the present invention, the parallel shaft fixing member 54 is pushed by the pushing device 55, so that the follower member 52 is displaced accordingly, so that the cam driven projection 521 is received by the grooved cam of the transmission member 51. The limitation of 513, 514 is such that the follower 52 accurately adjusts the fixed angle with the pushing device and the grooved cam at the synchronous rotational speed. The timing variable function can be achieved after an additional rotation change at a certain angle according to the demand.

Referring to Figure 7, there is shown a schematic diagram of a variable stroke timing pressure control system in accordance with a first embodiment of the present invention. The variable stroke timing pressure control system 10 of the first embodiment of the present invention includes: at least one driving device 11, 12, at least one active hydraulic cylinder 13, 14, at least one pipeline 15, 16, a first buffer device 17, and a The hydraulic cylinder 18 is operated.

The at least one drive unit 11, 12 has a plurality of operating time zones. In this embodiment, the at least one driving device includes a first driving device 11 and a second driving device 12, the first driving device 11 is a first cam, and the second driving device 12 is a second cam. The first cam and the second cam are linearly conjugate. The above described drive device 50 of the present invention can be reconnected to a remote hydraulic system, and can be applied to the variable stroke timing pressure control system 10 of the present invention.

Referring to Figure 15, there is shown a schematic view of a cam of a variable stroke timing pressure control system of the present invention. Taking the first driving device 11 (first cam) as an example, the first driving device 11 has a plurality of operating time zones according to the counterclockwise rotation direction, and includes: a no-action time zone 61, a preliminary action time zone 62, and a pressurization action time zone. 63. The overpressure action time zone 64, the decompression action time zone 65, and the end action time zone 66. The angle of the action time zone (for example, the preparatory action time zone 62) is the positive adjustment compensation angle 0.

The at least one active hydraulic cylinder has at least one active piston that is driven by the at least one drive device, the at least one active piston correspondingly moving a plurality of drive displacements in accordance with the operating time zone. In this embodiment, the at least one active hydraulic cylinder includes a first active hydraulic cylinder 13 and a second active hydraulic cylinder 14, the first active hydraulic cylinder 13 has a first active piston 131, and the second active hydraulic cylinder The 14 has a second active piston 141 which is driven by the first cam (first drive means 11) and which is driven by the second cam (second drive means 12). The drive shaft is coupled to the drive shaft of the drive unit 50 of the present invention to drive the active piston of the active hydraulic cylinder.

The at least one conduit is coupled to the at least one active hydraulic cylinder, the at least one conduit having a liquid therein. In the embodiment, the at least one pipeline includes a first pipeline 15 and a second pipeline 16, and the first pipeline 15 is connected to the first active hydraulic cylinder 13 and the action hydraulic cylinder 18, and the second A line 16 connects the second active hydraulic cylinder 14 and the operating hydraulic cylinder 18. That is, the first line 15 is connected to an active side of the operating hydraulic cylinder 18, and the second line 16 is connected to a passive side of the operating hydraulic cylinder 18.

The first buffer device 17 is connected to the first pipeline 15 and drives the first buffer device 17 to move by a liquid. The first set distance.

The action hydraulic cylinder 18 is connected to the first line 15 and the second line 16 and has an action piston 181. The action piston 181 is driven to move at least one by liquid according to the drive displacement and the first set distance. Motion displacement.

In this embodiment, the variable stroke timing pressure control system 10 further includes a second buffer device 19 and a third buffer device 21, the second buffer device 19 is connected to the first pipeline 15, according to the driving The displacement, the first set distance and the at least one movement displacement are driven by the liquid to move the second buffer device 19 by a second set distance. The third buffer device 21 is connected to the second line 16.

The variable stroke timing pressure control system 10 of the present invention further includes a timing action control device 22, which is connected to the first buffer device 17 by a motor or an electric motor driving the cam or the screw to change the displacement amount after the calculator calculates the demand. For controlling the first set distance, and a stroke control device 25, the action piston 181 is connected, and the motor or the electric motor drives the cam or the screw to change the displacement amount by calculating the demand by the calculator, and the movement distance can be set. , for the control of the itinerary.

The variable stroke timing pressure control system 10 of the present invention further includes at least one liquid storage tank coupled to the at least one active hydraulic cylinder for storing liquid. In this embodiment, the at least one liquid storage tank includes a first liquid storage tank 23 and a second liquid storage tank 24. The first liquid storage tank 23 is connected to the first active hydraulic cylinder 13, and the second liquid storage tank 24 is connected to the second active hydraulic cylinder 14.

The operation of the variable stroke timing pressure control system 10 of the first embodiment of the present invention will be described with reference to Figs. 7 to 13 and Fig. 15. Referring first to Figures 7, 8, and 15, the first cam 11 and the second cam 12 are rotated counterclockwise, Figure 7 is the beginning of the no-action time zone, Figure 8 is the end of the no-action time zone, and Figures 7-8 are the no-action time zones, That is, the driving displacement is 0, and the first active piston 131 and the second active piston 141 are not driven to move. And in the no-action time zone, the first active hydraulic cylinder 13 communicates with the first liquid storage tank 23, and the second active hydraulic cylinder 14 does not communicate with the second liquid storage tank 24.

Referring to Fig. 9, there is shown a schematic diagram of a preparatory action time zone of the variable stroke timing pressure control system of the first embodiment of the present invention. In the preparatory action time zone, the first cam 11 and the second cam 12 respectively drive the first active piston 131 and the second active piston 141 to move by a displacement of two. In the preparatory action time zone, the first active hydraulic cylinder 13 does not communicate with the first liquid storage tank 23, and the second active hydraulic cylinder 14 does not communicate with the second liquid storage tank 24. Further, the first set distance for moving the first buffer unit 17 by the liquid is 2 (the same as the drive shift 2 of the preliminary operation time zone).

Referring to Fig. 10, there is shown a schematic diagram of a pressurization action time zone of the variable stroke timing pressure control system of the first embodiment of the present invention. In the pressurizing action time zone, the first cam 11 and the second cam 12 respectively drive the first active piston 131 And the driving displacement of the second active piston 141 is 4. In the pressurizing action time zone, the first active hydraulic cylinder 13 does not communicate with the first liquid storage tank 23, and the second active hydraulic cylinder 14 does not communicate with the second liquid storage tank 24. Further, since the driving displacement is 4 and the first setting distance of the first damper device 17 is 2, the movement displacement of the movement of the operating piston 181 by the liquid is 2 (the operating piston 181 is set by the stroke control device 25). The moving distance value is 2).

Referring to Figure 1, there is shown a schematic diagram of an overvoltage action time zone of a variable stroke timing pressure control system in accordance with a first embodiment of the present invention. In the overpressure action time zone, the first cam 1 1 and the second cam 12 respectively drive the first active piston 131 and the second active piston 141 to move by a displacement of 5. And in the overpressure action time zone, the first active hydraulic cylinder 13 does not communicate with the first liquid storage tank 23, and the second active hydraulic cylinder 14 communicates with the second liquid storage tank 24. In addition, since the driving displacement is 5, the first set distance of the first buffer device 17 is 2, and the motion displacement is 2, the second buffer device 19 is driven by the liquid to move the second set distance to 1, That is, the motion displacement is still 2, and the overvoltage portion drives the second buffer device 19 to move.

Therefore, in the present embodiment, the pressure is set such that the pressure of the second buffer device 19 is greater than the pressure of the third buffer device 21, and the pressure of the third buffer device 21 is greater than the pressure of the first buffer device 17. Therefore, as described above, in the preliminary operation time zone, the first buffer device 17 is first driven to move the first set distance, because the first cam 11 is an external convex line type, so the set value can determine the timing (action time zone). After the elapsed time, if the set value is small, the pressure directly acts on the action piston 181 for a short time, and vice versa, the time is long; in the pressurization action time zone, the action piston 18 is further driven to move the action displacement; in the overpressure action time zone, the drive is further driven. The second buffer device 19 moves the second set distance.

Referring to Fig. 12, there is shown a schematic diagram of a decompression action time zone of the variable stroke timing pressure control system of the first embodiment of the present invention. At this time, the active piston 131 passes the highest point of the first cam 1 1 , the system enters the decompression action time zone, and the first cam 1 1 and the second cam 12 respectively drive the first active piston 131 and the second active piston 141 to move. The drive displacement is 4. In the decompression action time zone, the first active hydraulic cylinder 13 does not communicate with the first liquid storage tank 23, and the second active hydraulic cylinder 14 does not communicate with the second liquid storage tank 24. Further, the second damper device 19 is moved back up to the non-moving state, the first set distance of the movement of the first damper device 17 is maintained at 2, and the movement displacement of the movement of the actuating piston 18 is maintained at 2.

Referring to Figure 13, there is shown a schematic diagram of the end action time zone of the variable stroke timing pressure control system of the first embodiment of the present invention. In the end of the operation time zone, the first cam 1 1 and the second cam 12 respectively drive the first active piston 131 and the second active piston 141 to move by a displacement of 2. And in the end of the action time zone, the first active hydraulic cylinder 13 does not communicate with the first liquid storage tank 23, and the second active hydraulic cylinder 14 does not communicate with the second liquid storage tank 24. Further, the action piston 18 is returned to the unmoved state (the action displacement is 0), and the first set distance of the first buffer device 17 is maintained at 2. When the first cam 11 and the second cam 12 are rotated counterclockwise, the return to FIG. 7 is the start of the no-operation time zone. Please refer to the above description, and will not be described here. Therefore, the present invention can make a dynamic stroke setting using the stroke control device 25. The dynamic variable timing (action time zone) can be achieved by the characteristics of the movement of the cam circumference of the driving device and the change of the base circle, in conjunction with the buffer stroke setting of the first buffer device 17. The second buffer device 19 can provide pressure control.

Therefore, the dynamic stroke (Stroke) can be achieved, and the timing (the time duration) and the pressure (Pressure) can be changed. Moreover, the variable stroke timing pressure control system of the present invention can achieve dynamic control of the above items with a relatively simple mechanism, without the need to utilize expensive and complicated mechanisms as in the prior art.

Referring to Figure 14, there is shown a schematic diagram of a variable stroke timing pressure control system in accordance with a second embodiment of the present invention. The variable stroke timing pressure control system 30 of the second embodiment of the present invention comprises: a drive unit 31, an active hydraulic cylinder 32, a line 33, a first buffer unit 34, and an action hydraulic cylinder 35. The variable stroke timing pressure control system 30 of the second embodiment of the present invention is different from the variable stroke timing pressure control system 10 of the first embodiment of the present invention in that it does not have the second driving device and the second embodiment of the first embodiment. An active hydraulic cylinder, a second pipeline, a third buffering device, and the like, and a restoring spring 39 is disposed in the passive side of the operating hydraulic cylinder 35 so that the operating pressure is small or there is no operating pressure. The operating piston in the hydraulic cylinder 35 returns to the undisplaced state.

The variable stroke timing pressure control system 30 of the second embodiment of the present invention further includes a second buffering device 36, a timing action control device 37, a liquid storage tank 38 and a stroke control device 41. Please refer to the first embodiment described above. The relevant instructions are not described here. Therefore, with the variable stroke timing pressure control system of the second embodiment of the present invention, the variable stroke can also be achieved.

The above embodiments are merely illustrative of the principles of the invention and its effects, and are not intended to limit the invention. Therefore, those skilled in the art can make modifications and changes to the above embodiments without departing from the spirit of the invention. The scope of the claims of the present invention should be as set forth in the appended claims.

Claims

A drive device, characterized in that the drive device comprises:

a transmission member having an input shaft and at least one grooved cam;

a follower member, connected to the transmission member, driven by the transmission member, the follower member having at least one cam driven protrusion correspondingly disposed in the at least one grooved cam;

a parallel shaft connecting the follower and being driven by the transmission member;

a parallel shaft fixing member connecting the follower;

An output shaft coupled to a central axis of the parallel shaft and coupled to the central shaft;

a pushing device is connected to the parallel shaft fixing member for pushing the parallel shaft fixing member to move a pushing distance to drive the follower member to move parallel to the parallel shaft, so that the at least one cam is driven to the at least one Move inside the grooved cam.

The driving device as claimed in claim 1, wherein the transmission member further comprises a first annular member, the first annular member is connected to the input shaft, and the at least one grooved cam is disposed on the first ring And the at least one grooved cam is disposed obliquely and has an oblique angle with a central axis direction of the first annular member.

The driving device according to claim 2, wherein the follower further comprises a driven shaft and a second annular member, the driven shaft being coupled to the second annular member, the at least one cam The moving protrusion is protruded from the driven shaft, and the driven shaft is disposed in the first annular member, and the driven member has a hollow hole shape.

The driving device according to claim 3, wherein the parallel shaft is of a spline type, comprising a sleeve and a central shaft, the sleeve being disposed in a hollow hole of the driven member, the central shaft being The sleeve passes through, and the parallel shaft includes an end point disposed in the first annular member and connected to the transmission member by a fixed bearing.

The driving device according to claim 4, further comprising a differential bearing disposed in the parallel shaft fixing member, wherein the second annular member is disposed in the differential bearing.

The driving device according to claim 5, wherein the pushing device is a screw, and the parallel shaft fixing member includes a fixing nut, and the parallel shaft fixing member is interlocked with the screw.

A variable stroke timing pressure control system, the system comprising:

At least one driving device having a plurality of operating time zones;

At least one active hydraulic cylinder having at least one active piston driven by at least one of the driving devices, the active piston being capable of correspondingly moving a plurality of driving displacements according to the operating time zone; At least one pipeline connecting at least one of the active hydraulic cylinders, wherein the pipeline has a liquid therein;

a first buffering device connected to at least one of the pipelines for driving the first buffering device to move by a first set distance; and

An action hydraulic cylinder is connected to at least one of the pipelines. The action hydraulic cylinder has an action piston, and the action piston is moved by the liquid to move at least one action displacement according to the drive displacement and the first set distance.

8. The variable stroke timing pressure control system according to claim 7, wherein the system further comprises a second buffering device connected to the pipeline, according to the driving displacement, the first set distance And the at least one movement displacement, and driving the second buffer device by the liquid to move a second set distance.

9. The variable stroke timing pressure control system of claim 7, further comprising a stroke control device coupled to the first buffer device for controlling the first set distance.

10. The variable stroke timing pressure control system of claim 7 further comprising a return spring disposed within the actuating hydraulic cylinder.

11. The variable stroke timing pressure control system according to claim 7, wherein the system comprises a first driving device and a second driving device, the first driving device comprising a first cam, the second The drive device includes a second cam that is linearly conjugate with the second cam.

12. The variable stroke timing pressure control system according to claim 11, wherein the at least one active hydraulic cylinder comprises a first active hydraulic cylinder and a second active hydraulic cylinder, the first active hydraulic cylinder having a The first active piston has a second active piston, the first active piston is driven by the first cam, and the second active piston is driven by the second cam.

13. The variable stroke timing pressure control system of claim 12, wherein the system includes a first conduit and a second conduit, the first conduit connecting the first active hydraulic cylinder and the The hydraulic cylinder is connected to the second active hydraulic cylinder and the operating hydraulic cylinder.

The variable stroke timing pressure control system according to claim 13, wherein the system comprises a second buffer device and a third buffer device, wherein the second buffer device is connected to the first pipeline, The driving displacement, the first set distance and the at least one movement displacement are driven by the liquid to move the second buffering device to a second set distance, and the third buffering device is connected to the second pipeline.

15. The variable stroke timing pressure control system of claim 7, wherein the system includes at least one liquid storage tank coupled to at least one of the active hydraulic cylinders for storing liquid.