KR20100054585A - Apparatus for driving engine valve - Google Patents

Abstract

PURPOSE: A valve driving device is provided to secure the optimum fuel efficiency and output by precisely controlling the lift amount of a valve opening and closing a combustion chamber using a double cam method. CONSTITUTION: A valve driving device comprises a swing arm(100) and a cam unit(300). The swing arms is formed on the top of a valve(20) opening and closing a combustion chamber and operated with an external force to press the valve. The cam unit periodically rotates the swing arms, and includes a pivot member(310), a web member(320) formed in the pivot member, a high rotary shaft(330) forced to rotate by an external force, a high lift cam(340) with a high eccentric rod(342) rotated along with the rotation of the high rotary shaft, and a sub cam unit(350) operating the swing arms at the same time when the high lift cam rotates.

Description

Valve driving device {APPARATUS FOR DRIVING ENGINE VALVE}

The present invention relates to a valve driving apparatus, and more particularly, to a valve driving apparatus for achieving optimal fuel efficiency and output by continuously adjusting the lift amount of a valve for opening and closing a combustion chamber using a double cam system. .

In general, an automobile engine has a combustion chamber in which fuel is combusted to generate power, and a combustion valve of the automobile engine includes a valve train including an intake / exhaust valve capable of controlling intake air and exhaust gas. Interlocked with the crankshaft is configured to open and close the combustion chamber.

Such a valve train typically has a constant lift value of the valve by a cam having a constant shape, so that the amount of gas to be sucked or discharged is limited to a certain amount. Accordingly, if the design is made according to the low speed operation state, the time and amount of valve opening are not sufficient in the high speed operation state, and if the design is made according to the high speed operation state, the opposite phenomenon occurs in the low speed operation state.

More specifically, in the case of a general engine, since the valve lift is set large when tuned for high speed, it shows excellent performance in the high speed range, but is very disadvantageous for idle stability and low speed torque in the low speed range. In the case of the tuner, the idle stability and torque at low speed are excellent, but the output performance at high speed is limited. However, in the case of the above-mentioned variable valve lift, the valve lift is changed to suit the high speed region and the low speed region, respectively. And high speed at the same time.

Therefore, in order to improve fuel efficiency and output, a technology for increasing filling efficiency has been developed following the multi-valve, and as a result, the length or cross-sectional area of the intake manifold according to the intake resistance of the air that varies with the rotational area of the engine. Variable Induction System (VIS) to change the temperature, and variable valve timing to control the cylinder filling amount and residual gas amount by controlling the timing of opening and closing of the valve according to the rotational area of the engine and controlling the overlap timing Valve Timing (VVT) and Variable Valve Lift (VVL) are examples.

Conventional variable valve lift valve actuators cannot change the lift amount of the valve, and the opening and closing times of the intake or exhaust valves are always fixed at a constant state, so that the amount of air intake or discharge cannot be adjusted. There is a problem that can not achieve the optimum fuel economy and output depending on the operating state of the. Therefore, there is a need for improvement.

The present invention has been made in order to improve the above problems, by using an organically connected double cam method to finely adjust the lift amount of the valve that periodically opens and closes the combustion chamber to achieve the optimum fuel economy and output The purpose is to provide a valve drive device.

The valve driving apparatus according to the present invention includes: one side edge is formed to correspond to the upper side of the valve for opening and closing the combustion chamber and swings relative to the other side during external operation, and periodically swings the swing arm and the swing arm to press the valve periodically. It includes a cam portion.

The cam portion is a pivot member, which is a reference shaft, a web member formed on the pivot member, a high rotary shaft forcibly rotated by an external force, a high eccentric rod formed on the high rotary shaft and eccentrically rotated when the high rotary shaft is rotated. And a sub cam portion formed on the web member and the sub cam portion simultaneously operating at least one swing arm by the high eccentric rod when the high lift cam is rotated.

The sub cam part is a follower arm rotatably connected to the web member, a cam body formed on the low rotary shaft, a cam body formed on the cam body and rotated in the swing arm direction by periodic pressing of the high eccentric rod. And a low lift cam formed on the low rotary shaft and having a low eccentric rod to periodically press one side of each of the swing arms at the same time as the follow arm rotates, and by rotating by the own weight of the follow arm and the low lift cam. And an elastic member elastically supporting the cam body so as not to press the swing arm naturally.

The cam body forms the low lift cams corresponding to each other on both sides of the follow arm. The follower arm is rotatably provided with a follower roller at a portion directly contacting the high lift cam. In addition, the low lift cam forms a contact surface portion to support the center of the swing arm. In addition, the swing arm is rotatably formed on the contact surface portion and the contact roller.

Preferably, the follow arm and the low lift cam extend in different directions from the cam body.

The web member rotatably connects the link shaft, and the link shaft is connected to the actuating part.

The actuating unit calls the link shaft by linearly reciprocating a connecting rod connected to the link shaft, a link pin linked to the connecting rod, and a link pin linked to the link pin in a direction perpendicular to the axial direction of the link shaft. It includes a screw member for reciprocating on the trajectory and a power transmission member formed on the circumferential surface of the screw member for reciprocating forward and backward movement of the screw member when forced rotation by an external force.

At this time, the operating unit is screwed to the operator having an accommodating groove for accommodating the link shaft and the operator to reciprocally guide the link shaft on the arc trajectory by reciprocating forward and backward when the actuator rotates by external force. It includes a screw member.

The elastic member is preferably one side is supported by the link shaft, the other side is supported by the cam body. Preferably, the sub cam part is accommodated in a housing, and the housing and the sub cam part are formed to be connected to each other in order to receive lubricating oil from the outside.

As described above, the valve driving apparatus according to the present invention, unlike the prior art, to finely adjust the lift amount of the valve that periodically opens and closes the combustion chamber by adjusting the distance and the rolling contact area of the organically connected double cams. The optimum fuel economy and output can be realized. The present invention does not directly connect the high rotary shaft equipped with the upper cam of the double cam and the low rotary shaft equipped with the lower cam, so that the distance between the double cams can be easily adjusted. In addition, according to the present invention, the low rotary shaft maintains the axial direction as the low rotary shaft rotates the web members at the same direction and at the same speed while connecting each end with a pair of web members. By moving along, it is possible to control the plurality of valve lift amounts in the same manner.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the valve drive device according to the present invention. In this process, the thickness of the lines or the size of the components shown in the drawings may be exaggerated for clarity and convenience of description. In addition, terms to be described below are terms defined in consideration of functions in the present invention, which may vary according to the intention or convention of a user or an operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

1 is a cross-sectional view of a state in which a valve driving device according to an embodiment of the present invention is mounted on a housing, and FIGS. 2 and 3 are perspective views illustrating a connection relationship of a valve driving device according to an embodiment of the present invention. 4 is an exploded perspective view of a valve driving apparatus according to an embodiment of the present invention.

5 to 8 is an operation of the valve driving apparatus according to an embodiment of the present invention.

9 is a perspective view of a valve driving apparatus according to another embodiment of the present invention, Figure 10 is a view showing a flow path connection relationship of the valve driving apparatus according to an embodiment of the present invention.

1 to 4, the valve driving apparatus according to an embodiment of the present invention can variably control the lift amount of the valve 20 for opening and closing the combustion chamber 10 in the engine, and the swing arm 100. ) And the cam part 300.

The swing arm 100 forms one edge on the upper side of the valve 20 that opens and closes the combustion chamber 10, and performs a swing movement based on the other side during external operation, and periodically presses the valve 20 directly. do. In particular, the swing arm 100 is to generate a rocking motion of a constant profile so that the valve 20 can reciprocate in the vertical direction at regular intervals. Therefore, whenever the swing arm 100 rotates with respect to the other side and one side periodically presses the upper side of the valve 20, the valve 20 may open and close, that is, reciprocate in the vertical direction.

At this time, the swing arm 100 is provided with a valve 20 to correspond to the lower side of the one side in the longitudinal direction, the support member 200 is formed to be fixed to correspond to the lower side of the other side opposite to the one side in the longitudinal direction. Accordingly, the other side of the swing arm 100 serves as a reference for the swing arm 100 that rotates as supported by the support member 200.

In particular, the swing arm 100 is in contact with the lower side of the one side of the valve 20, the lower edge of the other side in contact with the support member 200, the support member 200 is in contact with the other lower surface of the swing arm (100) The upward force always acts. Therefore, the swing arm 100 is rotatable based on the other center P1 supported by the support member 200. That is, the center line L1 connecting the other center P1 and the one center P2 of the swing arm 100 is reciprocally rotated within the set rotation angle range with respect to the other center P1.

At this time, the support member 200 is fixedly mounted to the housing 30. The structure in which the support member 200 is fixed to the housing 30 is general. In addition, since the swing arm 100 is connected to the support member 200 and the valve 20 at each lower end thereof, the swing arm 100 does not easily shake or move. Here, the housing 30 is formed above the combustion chamber 10. The swing arm 100 and the support member 200 may be modified in various shapes.

On the other hand, the swing arm 100 is rotated relative to the other side by the external force, the cam portion 300 serves to rotate the swing arm 100 periodically.

Here, the cam part 300 includes a pivot member 310, a web member 320, a high rotary shaft 330, a high lift cam 340, and a sub cam part 350.

The pivot member 310 forms a reference axis of the cam 300 to operate. Thus, the pivot member 310 is fixedly formed on the inner surface of the housing (30). At this time, the pivot member 310 may be formed on one side of the inner side of the housing 30, it is preferably formed on both sides facing each other for the firm support of the web member (320). Thus, the web member 320 is rotatably connected to the corresponding pivot member 310. That is, the pivot member 310 is rotatably fitted to the web member 320, the web member 320 is rotated relative to the pivot member 310. Of course, the pivot member 310 may be rotatably inserted into the housing 30, and the web member 320 may be integrally formed with the pivot member 310. The pivot member 310 is shown in the axial shape, but can be applied in various shapes.

In addition, the web member 320 is connected to the pivot member 310. That is, the web member 320 inserts the pivot member 310 to the lower side rotatably. Thus, the web member 320 is rotatable based on the pivot member 310. Of course, the web member 320 is integrally formed on the pivot member 310 and rotated together, and the pivot member 310 may be rotatably mounted to the housing 30. The pivot member 310 is illustrated in a plate shape, but can be applied in various shapes.

The high rotary shaft 330 is forcibly rotated by an external force. In particular, the high rotary shaft 330 is supported in the housing 30. That is, the high rotary shaft 330 is rotatably supported at each end on the opposite side of the housing 30. Thus, the high rotary shaft 330 is firmly supported.

This high rotary shaft 330 has a high lift cam 340. The high lift cam 340 forms a high eccentric rod 342 on one side circumferential surface. Accordingly, the high lift cam 340 rotates eccentrically. That is, whenever the high eccentric rod 342, which is formed so that the high lift cam 340 rotates about its rotation axis P3 and protrudes on one side thereof, is positioned at a predetermined position on the circumference, the high eccentric rod 342 is To be described later, the follow arm 353 and the swing arm 100 of the cam unit 300 is pressed, and thus the valve 20 reciprocates in the vertical direction and opens and closes the combustion chamber 10.

In particular, the high lift cam 340 is rotated in the same direction and the same speed as the high rotary shaft 330. In this case, the high lift cam 340 may be detachably fixed to the high rotary shaft 330, or may be manufactured integrally with the high rotary shaft 330. The coupling method for separating the high lift cam 340 to the high rotary shaft 330 is performed by bolting or the like, and mainly diffusion bonding is adopted.

Meanwhile, the sub cam unit 350 is connected to the web member 320. The sub cam unit 350 serves to simultaneously operate one or more swing arms 100 by the high eccentric rod 342 when the high lift cam 340 is rotated.

In particular, the sub cam unit 350 includes a low rotary shaft 351, a cam body 352, a follow arm 353, a low lift cam 355, and an elastic member 358.

The low rotary shaft 351 is fixed to the web member 320 by forcibly fitting or the like. In particular, the low rotary shaft 351 may be rotatably connected to the web member 320, but when the rotation is possible, the flow path 410 for supplying oil to the cam body 352 should be changed, and the housing 30 Stiffness problems can arise.

At this time, as the web member 320 is provided with a pair, the low rotary shaft 351 supports each end to the corresponding web member 320. In particular, the low rotary shaft 351 is located below the high rotary shaft 330 within the housing 30.

The low rotary shaft 351 forms a cam body 352 on the circumferential surface. The cam body 352 supports the follow arm 353 and the low lift cam 355. In this case, the cam body 352 may be integrally formed with the low rotary shaft 351 or may be detachably coupled to the low rotary shaft 351. In particular, the cam body 352 is preferably formed in a ring shape is inserted into the low rotary shaft 351, rotatably connected. Thus, when the cam body 352 is rotated, the low rotary shaft 351 is rotated in the same direction and the same rotation speed with the cam body 352. The cam body 352 can be applied in various shapes. Of course, the follow arm 353 and the low lift cam 355 may be integrally manufactured with the low rotary shaft 351.

In addition, the follow arm 353 formed on the cam body 352 is reciprocally rotated in the direction of the swing arm 100 by periodically pressing the high eccentric rod 342. At this time, the follower arm 353 is preferably rotatably mounted to the follower roller 354 in order to minimize the friction of the portion in contact with the high eccentric rod 342. Here, the follower arm 353 is provided with a pair facing each other, it is preferable that the follower roller 354 is interposed therebetween. Of course, the follow roller 354 may be rotatably mounted inside the follow arm 353 to protrude upward and downward of the follow arm 353. In addition, the central axis P6 of the follow roller 354 rotates along the circle trajectory with respect to the center axis P4 of the lower rotary shaft 351.

In addition, the low lift cam 355 formed on the cam body 352 simultaneously serves to periodically press one side of each of the swing arms 100 when the follow arm 353 rotates. At this time, the low lift cam 355 protrudes to form a low eccentric rod 356 on one side circumferential surface. Thus, the low lift cam 355 is eccentrically rotated.

That is, whenever the low eccentric rod 356 is formed at a predetermined position on the circumference of the low lift cam 355 is rotated about its rotation axis (P4) to protrude on one side, the low eccentric rod 356 is The swing arm 100 is repeatedly pressed, and thus the valve 20 reciprocates in the vertical direction and opens and closes the combustion chamber 10.

At this time, the follow arm 353 and the low lift cam 355 are preferably formed integrally with the cam body 352, and extend in different directions from the cam body 352. In particular, the low eccentric rod 356 of the low lift cam 355 is preferably located lower than the follow roller 354 of the follow arm 353 in the cam body 352. This is to allow the follow roller 354 to receive a pressing force from the high eccentric rod 342 so that the low eccentric rod 356 can be pressed to one side of the swing arm 100 while being rotated to the minimum.

In particular, the cam body 352 is preferably formed in the number corresponding to the low lift cam 355 on both sides with respect to the follow arm (353). That is, a plurality of low lift cams 355 are formed to operate to press one side of each swing arm 100. Even number of low lift cams 355 are provided to the same number on both sides of the cam body 352 based on the follow arm 353. Preferably formed. This is because when the cam body 352 mounts different numbers of low lift cams 355 on both sides of the follow arm 353, the rotation moments may be slightly different from each other so that the operation of each swing arm 100 is performed. This may not be the same. For convenience, the low lift cam 355 is shown as being provided on each side of the cam body 352 on both sides of the follow arm 353.

On the other hand, the cam body 352 is elastically supported by the elastic member 358. This is to keep the follow roller 354 and the high lift cam 340 in close contact with each other during operation, and not to transmit the inertial force of the cam body 352 to the swing arm 100.

In particular, when the high lift cam 34 and the follow roller 354 are spaced apart during operation, the valve jumping phenomenon may occur from the noise to the large. In the case of noise generation, fatigue failure may occur due to repeated shocks, and as the phenomenon progresses at a high speed, the inertia force of the cam body 352 increases. Accordingly, the amount of the valve 20 intended by the inertia force of the cam body 352 at the moment when the high lift cam 340 of the high rotary shaft 330 presses the follow roller 354 of the low lift cam 355. It causes more opening. Therefore, the elastic member 358 is preferably to elastically support the cam body 352.

More specifically, the elastic member 358 is connected to the low rotary shaft 351, while supporting one side to the link shaft 360 to be described later and the other side to the cam body 352. Of course, the position at which both ends of the elastic member 358 are supported can be variously applied. At this time, the elastic member 358 is preferably made of a torsion spring. Of course, the elastic member 358 can be applied to a variety of mechanical elements that can perform the present function. In addition, the elastic member 358 is preferably formed at both edges of the lower rotary shaft 351 to support both sides of the cam body 352 in the same elasticity.

Accordingly, the elastic member 358 is supported by one side of the link shaft 360 serves to elastically lift the cam body 352.

In particular, the low lift cam 355 preferably forms the contact surface portion 357 to support the center of the swing arm 100. That is, in order to maintain the swing arm 100 supported on the bottom surface of the housing 30, the contact surface part 357 serves to press the upper side of the swing arm 100. At this time, when the low eccentric rod 356 of the low lift cam 355 presses one edge of the swing arm 100, the contact surface portion 357 simply contacts the center of the swing arm 100 or the swing arm 100. It is preferred to be freely spaced with. In addition, the swing arm 100 is preferably formed to rotate the swing roller 110 on the contact surface portion 357 and the contact portion. This is to minimize the friction between the contact surface portion 357 and the swing arm 100. Here, the swing roller 110 is rotatably mounted inside the center of the swing arm 100, and is exposed upward to directly contact the contact surface portion 357. Here, the central axis P5 of the swing roller 110 becomes the center of the center line L1 connecting the other side center P1 and the one side center P2 of the swing arm 100.

Meanwhile, the link shaft 360 rotatably connected to the web member 320 is connected to the operation unit 370. The operating unit 370 is a low lift cam 355 swing arm 100 in accordance with the inclination of the follow arm 353 is changed by moving the link shaft 360 along the arc path relative to the pivot member 310. One side of the role of controlling the amount of pressing.

As an example, the operation unit 370 includes a connecting rod 371, a link pin 372, a screw member 373, and a power transmission member 374.

The connecting rod 371 is connected to the link shaft 360 to directly push the link shaft 360 during the operation of the external reciprocating push force. In this case, since the link shaft 360 is connected to the connecting rod 371, the link shaft 360 moves together with the connecting rod 371 and is provided on the web member 320 rotatably mounted to the pivot member 310. Thus, the web member 320 can be reciprocated along the arc trajectory with the link shaft 360 based on the pivot member 310. In this case, the connecting rod 371 may be integrally formed on the link shaft 360, may be detachably mounted on the link shaft 360, and may be modified in various shapes.

In addition, the link pin 372 is linked to the connecting rod 371, the screw member 373 is linked to the link pin 372 is linear reciprocating movement in a direction perpendicular to the axial direction of the link shaft 360 By inducing the reciprocating movement of the link shaft 360 on the arc trajectory, the power transmission member 374 is formed on the circumferential surface of the screw member 373 to reciprocate forward and backward operation of the screw member 373 during forced rotation by external force It plays a role.

That is, when the power transmission member 374 rotates by an external force, the screw member 373 is linearly moved forward and backward by receiving the rotational force of the power transmission member 374, and the connecting rod 371 is the link pin 372. Receives forward and reverse external force through the control the link shaft 360 to reciprocate along the arc path.

At this time, the screw member 373 is applicable to a variety of mechanical elements, but preferably comprises a ball screw, the power transmission member 374 is preferably a nut that is rotated by an external force. In particular, the power transmission member 374 is connected to a power generation source 374a such as a motor. In particular, the power generation source 374a is preferably bolted to the power transmission member 374. The power generation source 374a serves to restrain the power transmission member 374 from moving in the axial direction of the operation unit 370 during movement or stop.

5 to 8 are diagrams showing the operating state of the operating unit 370 according to an embodiment of the present invention.

5 shows that the swing arm 100 is not rotated as the swing arm 100 is not pressed by the low lift cam 355, so that the valve 20 closes the combustion chamber 10. An imaginary line L2 connecting the central axis P5 and the central axis P4 of the low rotary shaft 351 to the center line L1 connecting the other center P1 and one center P2 of the swing arm 100. The state in which the operation unit 370 is operated to be vertical is shown.

At this time, as the contact surface portion 357 of the low lift cam 355 is simply in contact with the swing roller 110 to support the swing arm 100 from the upper side to the lower direction.

In addition, the high lift cam 340 is in contact with the follow roller 354 of the follow arm 353, the high eccentric rod 342 is directed in the direction opposite to the direction toward the follow roller 354.

Unexplained reference numerals are replaced with those described above.

6 shows that the power transmission member 374 is stopped and the virtual line L2 is perpendicular to the center line L1 connecting the other center P1 and one center P2 of the swing arm 100. In this case, the high rotary shaft 330 is rotated by an external force.

That is, when the high rotary shaft 330 is rotated by an external force, the high lift cam 340 is rotated together with the high rotary shaft 330, so that the high eccentric rod 342 follows the follow arm 353 The roller 354 is pressed for a predetermined time.

At this time, when the high eccentric rod 342 presses the follow arm 353, the cam body 352 is rotated and the low lift cam 355 is rotated in the same direction as the cam body 352. Thus, the low eccentric rod 356 presses the upper edge of one side of the swing arm 100. Therefore, the valve 20 opens and closes the combustion chamber 10.

In particular, when a portion corresponding to the end of the longest axis r of the high eccentric rod 342 in the central axis P3 of the high rotary shaft 330 presses the follow roller 354, the valve 20 may be a predetermined distance ( As it is completely lowered to D1), the combustion chamber 10 is opened as far as possible within the set range. Here, when the high eccentric rod 342 continuously presses the follow roller 354 in a constant curved section, the valve 20 opens and closes the combustion chamber 10 by the pressing force of the swing arm 100.

Unexplained reference numerals are replaced with those described above.

7 is a state in which the power transmission member 374 is rotated so as to rotate the connecting rod 371 and the web member 320 along the arc trajectory with respect to the pivot member 310.

That is, since the swing arm 100 does not rotate as the swing arm 100 is not pressed by the low lift cam 355, the imaginary line L2 is the center line in the state in which the valve 20 closes the combustion chamber 10. The state inclined not perpendicular to L1 is shown.

In particular, when the screw member 373 is straight backward, the web member 320 and the low rotary shaft 351 is moved by a predetermined distance (A) along the arc trajectory in the counterclockwise direction.

Here, the central axis P6 of the follow roller 354 is the same distance (A) as the web member 320 and the low rotary shaft 351 is moved by a predetermined distance (A) along the arc trajectory in the counterclockwise direction As the follower arm 353 is moved in a counterclockwise direction with respect to the central axis P4 of the low rotary shaft 351.

At this time, as the contact surface portion 357 of the low lift cam 355 is simply in contact with the swing roller 110 to support the swing arm 100 from the upper side to the lower direction. That is, the swing roller 110 is preferably formed in a diameter that is always in contact with the contact surface portion 357 moving along the arc trajectory in the closed initial state of the valve 20.

In addition, the high lift cam 340 is in contact with the follow roller 354 of the follow arm 353, the high eccentric rod 342 is directed in the direction opposite to the direction toward the follow roller 354.

Unexplained reference numerals are replaced with those described above.

8 illustrates a state in which the high rotary shaft 330 is rotated by an external force while the power transmission member 374 is stopped and the virtual line L2 is not perpendicular to the center line L1.

That is, when the high rotary shaft 330 is rotated by an external force, the high lift cam 340 is rotated together with the high rotary shaft 330, so that the high eccentric rod 342 follows the follow arm 353 The roller 354 is pressed for a predetermined time.

At this time, when the high eccentric rod 342 presses the follow arm 353, the cam body 352 is rotated and the low lift cam 355 is rotated in the same direction as the cam body 352. Thus, the low eccentric rod 356 presses the upper edge of one side of the swing arm 100. Therefore, the valve 20 opens and closes the combustion chamber 10.

At this time, when the portion corresponding to the end of the longest axis r of the high eccentric rod 342 in the central axis P3 of the high rotary shaft 330 presses the follow roller 354, the valve 20 is a predetermined distance ( As it is completely lowered to D2), the combustion chamber 10 is opened as far as possible within the set range. Here, when the high eccentric rod 342 continuously presses the follow roller 354 in a constant curved section, the valve 20 opens and closes the combustion chamber 10 by the pressing force of the swing arm 100.

In particular, the falling distance D2 of the valve 20 in the state where the center line L1 and the imaginary line L2 is not perpendicular is lowered of the valve 20 in the state in which the center line L1 and the imaginary line L2 are vertical. It becomes longer than the distance D1. This increases the amount of pressing of the high eccentric rod 342 as the follow roller 354 is moved relative to the central axis P4 of the low rotary shaft 351 while moving along the arc trajectory by a predetermined distance A1. Because I receive a lot.

Unexplained reference numerals are replaced with those described above.

On the other hand, Figure 9 is a view showing a valve driving device having a drive unit according to another embodiment of the present invention.

In another embodiment, the drive unit 370 includes an actuator 375 and a screw member 378.

The operator 375 has a receiving groove 376 to receive the link shaft 360 inside. At this time, since the link shaft 360 is moved along the arc trajectory, the receiving groove 376 is preferably formed in a long long hole shape in the up and down directions or in a hole shape opened to the lower side of the operator 375.

In addition, a plurality of actuators 375 may be formed on the link shaft 360 to operate simultaneously, but it is illustrated as one connected to the link shaft 360 for convenience. In addition, the operator 375 may be modified in various shapes.

The screw member 378 is also axially inserted into the operator 375 in a direction perpendicular to the axial direction of the link shaft 360. Thus, when the screw member 378 is rotated by an external force, the operator 375 is linear reciprocating forward and backward operation along the axial direction of the screw member 378. At this time, the screw member 378 is preferably a ball screw. The structure in which the screw member 378 is rotated by an external force and the structure in which the screw member 378 is rotated by position are applicable in various ways.

On the other hand, when the operator 375 is linear reciprocating forward and backward, the link shaft 360 and the web member 320 is reciprocated along the arc trajectory relative to the pivot member 310.

The principle that the lowering distance of the valve changes as the operator 375 moves forward and backward is the same as described above.

Unexplained reference numerals are replaced with those described above.

In addition, FIG. 10 is a view showing a state in which a flow path 410 is formed in order to minimize friction during mutual contact by supplying lubricating oil to each element of the valve driving device through the housing 30.

That is, the housing 30 forms an inlet 420 on one side to receive lubricant. And the housing 30 forms the flow path 410 from the inlet 420 to the site | part in which the support member 200 was mounted. The support member 200 always supports the lower edge of the other side of the swing arm 100 by the pushing force of the lubricating oil supplied through the flow path 410.

In addition, the housing 30 forms another flow path 410 from the inlet 420 to the pivot member. The pivot member 310 flows and guides the lubricating oil to the inside of the web member 320 through the inside, and the web member 320 flows and guides the supplied lubricating oil into the low rotary shaft 351. In addition, the lubricating oil supplied into the low rotary shaft 351 is supplied between the low rotary shaft 351 and the cam body 352, and discharged outward through the outlet 430 formed on the cam body 352, and the high lift cam. 340 and the follower roller 354 is in contact with the flow. Accordingly, the flow path 410 is also formed inside the pivot member 310, the web member 320, the low rotary shaft 351, and the cam body 352.

Of course, the flow path 410 may be formed in various paths so that the lubricating oil may flow to the contact portion between all parts.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and those skilled in the art to which the art belongs can make various modifications and other equivalent embodiments therefrom. I will understand. Therefore, the true technical protection scope of the present invention will be defined by the claims below.

1 is a cross-sectional view of a state in which a valve driving device according to an embodiment of the present invention is mounted on a housing.

2 and 3 are perspective views showing a connection relationship of the valve drive device according to an embodiment of the present invention.

Figure 4 is an exploded perspective view of the valve driving apparatus according to an embodiment of the present invention.

5 to 8 is an operation of the valve driving apparatus according to an embodiment of the present invention.

9 is a perspective view of a valve driving apparatus according to another embodiment of the present invention.

10 is a view showing a flow path connection relationship of the valve driving apparatus according to an embodiment of the present invention.

<Explanation of symbols on main parts of the drawings>

20: valve 30: housing

100: swing arm 110: swing roller

200: support member 300: cam portion

310: pivot member 320: web member

330: high rotary shaft 340: high lift cam

350: sub-cam part 351: low rotary shaft

352: cambodi 353: follow arm

355: low lift cam 358: elastic member

360: link shaft 370: operating part

Claims (13)

A swing arm which forms one side edge corresponding to an upper side of the valve for opening and closing the combustion chamber, and swings the other side with respect to the other side during external operation and periodically presses the valve; And And a cam portion for periodically rotating the swing arm. The method of claim 1, wherein the cam unit, A pivot member serving as a reference axis; A web member formed on the pivot member; A high rotary shaft forcibly rotated by an external force; A high lift cam formed on the high rotary shaft and having a high eccentric rod that is eccentrically rotated when the high rotary shaft is rotated; And And a sub cam portion formed in the web member and simultaneously operating at least one swing arm by the high eccentric rod when the high lift cam is rotated. The method of claim 2, wherein the sub cam unit, A low rotary shaft rotatably connected to the web member; A cam body formed on the low rotary shaft; A follower arm formed on the cam body and rotated in the swing arm direction by periodic pressing of the high eccentric rod; A low lift cam formed on the low rotary shaft and having a low eccentric rod to periodically press one side of each of the swing arms at the same time as the follower arm rotates; And And an elastic member for elastically supporting the cam body. The method of claim 3, wherein The cam body is a valve driving device, characterized in that to form a number corresponding to the low lift cam on both sides with respect to the follow arm. The method of claim 3, wherein The follower arm is a valve driving device, characterized in that provided with a rotatable follower roller in a portion directly in contact with the high lift cam. The method of claim 3, wherein And the low lift cam forms a contact surface portion to support the center of the swing arm. The method of claim 6, The swing arm is a valve driving device, characterized in that to form a swinging roller rotatable in the contact portion and the contact portion. The method of claim 3, wherein And the follow arm and the low lift cam extend in different directions from the cam body. The method according to any one of claims 2 to 8, The web member rotatably connecting the link shaft; The link shaft is connected to an actuating part; The actuating unit controls the amount of pressing the low lift cam one side of the swing arm in accordance with the inclination of the follower arm is changed by moving the link shaft along the arc path relative to the pivot member. Device. The method of claim 9, wherein the operation unit, A connecting rod connected to the link shaft; A link pin linked to the connecting rod; A screw member connected to the link pin to linearly reciprocate in a direction perpendicular to an axial direction of the link shaft to reciprocate the link shaft on an arc trajectory; And And a power transmission member formed on the circumferential surface of the screw member to reciprocate the screw member reciprocating forward and backward during forced rotation by an external force. The method of claim 9, wherein the operation unit, An operator having an accommodating groove for accommodating the link shaft therein; And And a screw member which is screwed to the operator and reciprocates the link shaft on the arc trajectory by reciprocating the operator forward and backward when rotating by an external force. The method of claim 9, The elastic member is a valve driving device, characterized in that one side is supported by the link shaft, the other side is supported by the cam body. The method of claim 9, The subcam part is accommodated in a housing; The housing and the sub-cam unit valve driving apparatus, characterized in that to form a flow path connected to each other in order to receive lubricant from the outside.

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