JP5811057B2 - Variable valve gear - Google Patents

Description

  The present invention relates to a variable valve gear that can change the working angle of a cam used in an internal combustion engine.

  2. Description of the Related Art Conventionally, there is known a variable valve operating apparatus that variably controls an operating angle of a cam that drives an intake valve or an exhaust valve mounted on an internal combustion engine. For example, Patent Document 1 discloses a variable valve that includes a drive shaft and a cylindrical cam shaft that is disposed coaxially with the drive shaft on the outer periphery of the drive shaft and has a cam on the outer periphery for driving the intake and exhaust valves. An apparatus is disclosed. A control sleeve is disposed between the drive shaft and the cam shaft. An annular disk is located between the first flange provided at the end of the cam shaft and the second flange provided at the drive shaft. The annular disk and the drive shaft are interlocked via a pin and an engaging groove, and the annular disk and the cam shaft are interlocked via a pin and an engaging groove. The annular disk is supported by an eccentric bearing portion at the tip of the control sleeve, and the eccentric direction changes as the operation lever portion rotates.

Japanese Patent Laid-Open No. 9-88530

  By the way, when the variable valve system as described above is mounted on the internal combustion engine, the drive shaft or the cam shaft is supported by the bearing. When the variable valve gear is mounted on an internal combustion engine, if the camshaft is supported by a bearing, the center shaft of the cam swings, so that the target valve lift cannot be obtained and the valve lift waveform may be distorted. There is. This phenomenon is caused by the outer peripheral side of the cam shaft being supported by the bearing and the inner peripheral side of the cam shaft contacting the outer peripheral surface of the drive shaft. Further, when the drive shaft is supported by the bearing, the bearing is disposed at a portion exposed from the cam shaft. However, the complicated mechanism for transmitting the rotation of the drive shaft to the cam shaft hinders the space for the bearing arrangement, and it is difficult to support the drive shaft while ensuring the rigidity. Had a problem with the mountability.

  Therefore, an object of the variable valve apparatus disclosed in the present specification is to improve the mountability to an internal combustion engine.

  In order to solve the above problems, a variable valve operating apparatus disclosed in the present specification includes a drive shaft member that rotates in synchronization with a crankshaft included in an internal combustion engine, a cam lobe, and is rotatable around the drive shaft member. A cam shaft member provided; a drive arm portion provided on the drive shaft member; rotating with the drive shaft member; and an eccentric hole, wherein the drive shaft member is inserted into the eccentric hole, and the eccentric hole A control sleeve arranged so that the position of the central axis can be changed, a rotating member that rotates along the inner peripheral wall surface of the eccentric hole, and the rotation of the drive arm portion is transmitted to the cam shaft member via the rotating member. A link member configured to align a central axis of the drive shaft member inserted through the eccentric hole and a rotation central axis of the control sleeve.

  By making the center axis of the drive shaft member coincide with the rotation center axis of the control sleeve, the drive shaft member and the control sleeve can be mounted on the internal combustion engine and supported by the internal combustion engine body using a common cap. .

  The link member includes a first link member having one end connected to the drive arm portion and the other end connected to the rotating member, and one end connected to the cam shaft member and the other end connected to the rotating member. A connected second link member may be included.

  And the connection position of the said 1st link member with respect to the said rotation member and the connection position of the said 2nd link member with respect to the said rotation member can be set to the position 180 degree apart in the said rotation member. Thereby, interference with a 1st link member and a 2nd link member and interference with a drive arm part and a cam shaft member can be suppressed.

  The rotating member may include a plate-like portion, and the first link member and the second link member may be disposed on one surface side of the plate-like portion. By placing the first link member and the second link member close to the one surface side of the plate-like part, that is, the front end side or the rear end side of the rotating member with respect to the axial direction, Space can be secured. In this space, a drive shaft member, a bearing and a cap for supporting the control sleeve on the internal combustion engine can be arranged.

  The second link member may be connected to a cam lobe included in the cam shaft member. Thereby, the arm part for connecting a 2nd link member can be abolished. As a result, the axial dimension of the variable valve apparatus can be reduced. In addition, a space in which the bearing can be installed can be secured, and the mountability of the variable valve operating apparatus on the internal combustion engine can be improved.

  The control sleeve includes a cylindrical portion having a central axis that coincides with the central axis of the drive shaft member, the drive shaft member is inserted inside the cylindrical portion, and the cylindrical portion, the drive shaft member, A bearing may be interposed between the two. The variable valve device can be easily mounted on the internal combustion engine by arranging a bearing around the cylindrical portion and mounting a cap.

  According to the variable valve operating apparatus disclosed in this specification, the mountability of the variable valve operating apparatus on an internal combustion engine can be improved.

FIG. 1 is a perspective view showing a variable valve operating apparatus according to an embodiment. FIG. 2 is a perspective view of the variable valve operating apparatus according to the embodiment as viewed from a direction different from that in FIG. FIG. 3 is an explanatory view showing a part of the variable valve operating apparatus of the embodiment and showing a part thereof. FIG. 4 is an enlarged perspective view showing a part of the variable valve operating apparatus according to the embodiment. FIG. 5 is a perspective view showing a section of the variable valve operating apparatus of the embodiment and enlarging a part thereof. FIG. 6 is a plan view of a drive shaft included in the variable valve operating apparatus of the embodiment. FIG. 7A-1 is a perspective view of a cam shaft member included in the variable valve operating apparatus of the embodiment, and FIG. 7A-2 is a cam viewed from a direction different from FIG. 7A-1. It is a perspective view of a shaft member. 7B-1 is a left side view of the cam shaft member, FIG. 7B-2 is a front view of the cam shaft member, and FIG. 7B-3 is a right side view of the cam shaft member. FIG. 8 (A-1) is a perspective view of a drive arm portion included in the variable valve operating apparatus of the embodiment, and FIG. 8 (A-2) is a drive viewed from a direction different from FIG. 8 (A-1). It is a perspective view of an arm part. 8B-1 is a left side view of the drive arm portion, FIG. 8B-2 is a front view of the drive arm portion, and FIG. 8B-3 is a right side view of the drive arm portion. FIG. 9A-1 is a perspective view of a drive disk included in the variable valve operating apparatus of the embodiment, and FIG. 9A-2 is a drive disk viewed from a direction different from FIG. 9A-1. FIG. 9B-1 is a left side view of the drive disk, FIG. 9B-2 is a front view of the drive disk, and FIG. 9B-3 is a right side view of the drive disk. FIG. 10 (A-1) is a perspective view of a first link member (second link member) included in the variable valve operating apparatus of the embodiment, and FIG. 10 (A-2) is similar to FIG. 10 (A-1). FIG. 5 is a perspective view of a first link member (second link member) viewed from different directions. FIG. 10B-1 is a left side view of the first link member (second link member), FIG. 10B-2 is a front view of the first link member (second link member), and FIG. 3) is a right side view of the first link member (second link member). FIG. 11A-1 is a perspective view of a control sleeve included in the variable valve operating apparatus of the embodiment, and FIG. 11A-2 is a control sleeve viewed from a direction different from FIG. 11A-1. FIG. 11B-1 is a left side view of the control sleeve, FIG. 11B-2 is a front view of the control sleeve, and FIG. 11B-3 is a right side view of the control sleeve. FIG. 12 is an assembly diagram of the variable valve operating apparatus. FIGS. 13A-1 to 13C-4 are explanatory views showing the operation example of the variable valve operating apparatus according to the embodiment with the cross section changed.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings. However, in the drawings, the dimensions, ratios, and the like of each part may not be shown so as to completely match the actual ones.

(Embodiment)
First, a schematic configuration of a variable valve apparatus 1 according to an embodiment will be described with reference to the drawings. FIG. 1 is a perspective view showing a variable valve operating apparatus 1 according to an embodiment. FIG. 2 is a perspective view of the variable valve apparatus 1 according to the embodiment viewed from a direction different from that in FIG. FIG. 3 is an explanatory view showing a part of the variable valve operating apparatus of the embodiment and showing a part thereof. FIG. 4 is an enlarged perspective view showing a part of the variable valve operating apparatus 1 of the embodiment. FIG. 5 is a perspective view showing the variable valve operating apparatus 1 of the embodiment in cross section and showing a part thereof enlarged. The variable valve gear 1 is installed in an in-line four-cylinder internal combustion engine. The variable valve operating apparatus 1 is used for driving the intake valve 53 of the internal combustion engine, but can also be used for driving the exhaust valve. In the internal combustion engine, # 1 cylinder, # 2 cylinder, # 3 cylinder, and # 4 cylinder are arranged in order from the front side. Each cylinder is provided with two intake valves 53.

  1 to 5, the variable valve operating apparatus 1 includes a drive shaft member 2 that rotates in synchronization with a crankshaft included in an internal combustion engine. The variable valve operating apparatus 1 includes a cam shaft portion 3 that is rotatably provided around a drive shaft member 2. The cam shaft portion 3 has a cam lobe 3a. The variable valve operating apparatus 1 includes a drive arm unit 4 that is provided on the drive shaft member 2 and rotates together with the drive shaft member 2. The variable valve operating apparatus 1 includes a drive disk 5 corresponding to a rotating member and a control sleeve 8. The drive disk 5 rotates along the inner peripheral wall surface 8a1 of the eccentric hole 8a provided in the control sleeve 8.

  Referring to FIG. 6, the drive shaft member 2 includes a VVT (Variable Valve Timing) mounting portion 2 a and a pulley portion 2 b at the front end. The drive shaft member 2 is a hollow rod-like body, and includes an oil supply hole 2 c for supplying lubricating oil and a pin hole 2 d for fixing the drive arm portion 4 to the drive shaft member 2 using the coupling pin 13. Yes. The pin hole 2 d passes through the drive shaft member 2. The pin holes 2d are provided corresponding to the cylinders # 1 to # 4. The central axis of the drive shaft member 2 is AX.

  7 (A-1), FIG. 7 (A-2), FIG. 7 (B-1), FIG. 7 (B-2), and FIG. 7 (B-3), the cam shaft member 3 is a cylinder. And is provided with two cam lobes 3a corresponding to the number of intake valves 53 for each cylinder. The rotation center axis of the cam shaft member 3 is AXc. The cam shaft member 3 is rotatably provided around the drive shaft member 2 so that the rotation center axis AXc coincides with the center axis AX of the drive shaft member 2. The cam lobe 3a includes a nose portion 3a1 and a base circle portion 3a2. Of the two cam lobes 3a, a pin joint 3b is provided on the side surface of one cam lobe 3a. One end of a second link member 6b is connected to the pin joint portion 3b as will be described in detail later. Such a cam shaft member 3 is prepared for each of the cylinders # 1 to # 4, and is rotatably provided around the drive shaft member 2 as shown in FIGS. As shown in FIGS. 1 and 2, the cam lobe 3 a abuts against a rocker roller 52 included in the rocker arm 51 and lifts the intake valve 53.

  8 (A-1), 8 (A-2), 8 (B-1), 8 (B-2) and 8 (B-3), the drive arm portion 4 is a cylinder. A cylindrical member 4a and a plate-like portion 4b serving as an arm. The rotation center axis of the drive arm portion 4, that is, the center axis line of the cylindrical portion 4a is AXd. The drive arm portion 4 is fixed to the drive shaft member 2 so that the center axis AXd coincides with the center axis AX of the drive shaft member 2. The tubular portion 4a is provided with a pin hole 4a1 into which the coupling pin 13 is inserted in order to fix and integrate the drive arm portion 4 to the drive shaft member 2. The plate-like portion 4b is provided with a pin insertion hole 4b1 for connecting one end of the first link member 6a1 as will be described later. Such a drive arm portion 4 is prepared for each of the cylinders # 1 to # 4, and is fixed to the drive shaft member 2 by a coupling pin 13 as shown in FIGS. That is, the drive arm portion 4 is provided integrally with the drive shaft member 2 and rotates together with the drive shaft member 2. Referring to FIGS. 3 and 5, the drive arm portion 4 is disposed adjacent to the cam shaft member 3. At this time, the drive arm portion 4 is attached to the drive shaft member 2 so as not to interfere with the pin joint portion 3b included in the cam shaft member 3.

  Referring to FIGS. 9A-1, 9A-2, 9B-1, 9B-2, and 9B-3, the drive disk 5 has a plate shape. A portion 5a and a cylindrical portion 5d are provided. Here, one surface side of the plate-like portion 5a is referred to as a first surface 5a1, and a surface that is the back surface side of the first surface 5a1 is referred to as a second surface 5a2. The cylindrical portion 5d is provided on the second surface 5a2 side. The drive disk 5 corresponds to a rotating member. That is, it rotates along the inner peripheral wall surface 8a1 of the eccentric hole 8a provided in the control sleeve 8 described in detail later. Referring to FIGS. 3 and 5, the cylindrical portion 5d is inserted into the eccentric hole 8a. The rotation center axis of the drive disk 5, that is, the center axis of the cylindrical portion 5d is AXdd. The central axis AXdd coincides with the central axis AX2 of an eccentric hole 8a provided in the control sleeve 8 described later. A first bearing 9 is interposed between the inner peripheral wall 8a1 of the eccentric hole 8a and the cylindrical portion 5d. The plate-like portion 5a of the drive disk 5 is provided with a first pin coupling portion 5c1 and a second pin coupling portion 5c2. The first pin coupling portion 5c1 is provided with a first pin insertion hole 5c11. A second pin insertion hole 5c21 is provided in the second pin coupling portion 5c2. As will be described later, the first pin coupling portion 5c1 is a connection position of the first link member 6a, and the second pin coupling portion 5c2 is a connection position of the second link member 6b. The first pin coupling portion 5c1 and the second pin coupling portion 5c2 are provided at 180 ° apart from each other in the drive disk 5. That is, the first pin coupling portion 5 c 1 and the second pin coupling portion 5 c 2 are provided at positions facing each other on the drive disk 5.

  Referring to FIG. 10 (A-1), FIG. 10 (A-2), FIG. 10 (B-1), FIG. 10 (B-2) and FIG. 10 (B-3), the first link member 6a is Two pin insertion holes 6a1 are provided. Similarly, the second link member 2b includes two pin insertion holes 6b1. The first link member 6a and the second link member 6b have the same shape. The first link member 6 a and the second link member 6 b are link members that transmit the rotation of the drive arm portion 4 to the camshaft member 3 via a drive disk 5 corresponding to a rotating member. One end side of the first link member 6a is connected to the drive arm portion 4 using the first connecting pin 7a, and the other end side is connected to the drive disk 5 using the second connecting pin 7b. Specifically, the first connecting pin 7a is inserted into the pin insertion hole 4b1 provided in the arm portion 4b and the pin insertion hole 6a1 on one end side of the first link member 6a, and the arm portion 4b and the first link member 6a are inserted. Are connected to each other by pin coupling. The second connecting pin 7b is inserted into the pin insertion hole 6a1 on the other end side of the first link member 6a and the first pin insertion hole 5c11 provided in the first pin coupling portion 5c1 of the drive disk 5, The one link member 6a and the first pin coupling portion 5c1 are connected by pin coupling. Thereby, the rotation of the drive arm unit 4 is transmitted to the drive disk 5.

  One end side of the second link member 6b is connected to the drive disk 5 using the third connecting pin 7c, and the other end side is connected to the camshaft member 3 using the fourth connecting pin 7d. Specifically, the third connecting pin 7c is inserted into the second pin insertion hole 5c21 provided in the second pin coupling portion 5c2 of the drive disk 5 and the pin insertion hole 6b1 on the one end side of the second link member 6b. The 2-pin coupling portion 5c2 and the second link member 6b are connected by pin coupling. The fourth connecting pin 4d is inserted into the pin insertion hole 6b1 on the other end side of the second link member 6b and the pin insertion hole 3b1 provided in the pin joint portion 3b provided in the cam lobe 3 of the cam shaft member 3. Thus, the second link member 6b and the cam shaft member 3 are connected by pin coupling. As a result, the rotation of the drive disk 55 is transmitted to the camshaft member 3. Thus, the first link member 6 a and the second link member 6 b transmit the rotation of the drive arm portion 4 to the cam shaft member 3 via the drive disk 5.

  Both the first link member 6a and the second link member 6b are arranged on the first surface 5a1 side of the plate-like portion 5a provided in the drive disk 5. As will be described in detail later, the control sleeve 8, the second bearing 10, the third bearing 11, and the cap 12 are disposed on the second surface 5a2 side of the plate-like portion 5a.

  11 (A-1), FIG. 11 (A-2), FIG. 11 (B-1), FIG. 11 (B-2) and FIG. 11 (B-3), the control sleeve 8 has an eccentric hole. 8a. Moreover, the outer peripheral surface is provided with a gear portion 8b and a cylindrical portion 8c. The rotation center axis AX1 of the control sleeve 8 coincides with the center axis of the inner circumferential circle of the cylindrical portion 8c. The rotation center axis AX1 is different from the center axis AX2 of the eccentric hole 8a. The drive shaft member 2 is inserted through the eccentric hole 8a and the cylindrical portion 8c. Here, the central axis AX of the drive shaft member 2 inserted through the eccentric hole 8a and the cylindrical portion 8c and the rotation central axis AX1 of the control sleeve 8, that is, the central axis of the cylindrical portion 8c coincide. Referring to FIGS. 3 and 5, the cylindrical portion 5 d of the drive disk 5 is rotatably mounted in the eccentric hole 8 a via the first bearing 9. Further, since the second bearing is interposed between the cylindrical portion 8 c and the drive shaft member 2, the drive shaft member 2 is supported in the cylindrical portion 8 c via the second bearing 10. A third bearing 11 is mounted on the outside of the cylindrical portion 8c, and a cap 12 is disposed on the outside of the third bearing. Thus, both the drive shaft member 2 and the control sleeve 8 are mounted on the internal combustion engine. The gear portion 8b meshes with a gear portion 61 provided in the control shaft member 60 as shown in FIG. 11B-2, and rotates the control sleeve 8 as the control shaft member 60 rotates. As the control sleeve 8 rotates, the position of the central axis AX2 of the eccentric hole 8a changes. In the present embodiment, the position where the position of the center axis AX2 is adjusted to the height of the end surface of the cap 12 is used as the reference position. The valve lift and operating angle at this reference position are taken as the reference operating angle. From this state, the control sleeve 8 is rotated to one side so that the rotational speed of the camshaft member 3 is increased during the period when the intake valve 53 is opened, and the rotational speed of the camshaft member 3 is decreased during the period when the intake valve 53 is closed. To do. When the drive shaft member 2 rotates in this state, the valve opening timing of the intake valve 53 is advanced and the valve closing timing is delayed, so that the operating angle increases. When the control sleeve 8 is rotated from the reference position to the other side, the operating angle becomes small.

  The camshaft member 3, the drive arm portion 4, the drive disk 5, and the control sleeve 8 are provided for each cylinder # 1 to # 4. Referring to FIG. 12, the camshaft member 3 and the drive arm portion 4 are inserted and attached to the driveshaft member 2. The drive arm unit 4 is fixed to the drive shaft member 2 by using a coupling pin 13. Then, the control sleeve 8 incorporating the drive disk 5 to which the first link member 6a and the second link member 6b are attached is mounted on the first surface 5a1 side. The first bearing 10 and the second bearing 11 are attached to the cylindrical portion 8 c located on the rear end side of the control sleeve 8. A cap 12 is disposed around the second bearing 11 when the variable valve apparatus 1 is mounted on the internal combustion engine. As described above, in the variable valve operating apparatus 1 according to the embodiment, the space for supporting the drive shaft member 2 on the internal combustion engine and the space for supporting the control sleeve 8 on the internal combustion engine are separated from each other without dividing the space. Can be supported. That is, the mountability of the variable valve operating apparatus 1 of the embodiment on an internal combustion engine is good. A combination of the first bearing 10, the second bearing 11, and the cap 12 is provided for each cylinder. That is, the variable valve apparatus 1 is supported by the internal combustion engine at four locations. Thereby, the rigidity of the valve operating system can be ensured. Further, since the camshaft member 3 is not supported, the rotation center axis of the cam lobe 3a does not swing, a target valve lift can be realized, and a good valve lift waveform can be obtained.

  Next, the operation of the variable valve gear 1 will be described. When the control shaft member 60 rotates based on a command from an ECU (Electronic control unit), the control sleeve 8 rotates. Thereby, the position of the central axis AX2 of the eccentric hole 8a provided in the control sleeve 8 changes, and as a result, the operating angle changes.

  13A-1 to 13A-4 are cross-sectional views taken along line EE in FIG. 13B-1 to B-4 are cross-sectional views taken along line FF in FIG. 13C-1 to 13C-4 are cross-sectional views taken along the line GG in FIG. 13 (A-1, (B-1), and (C-1) show the state before the intake valve lift. FIGS. 13 (A-2), (B-2), and (C-). 2A shows the state when the intake valve lift is started, and FIGS. 13A-3, B-3, and C-3 show the state when the intake valve is closed. (A-4), (B-4) and (C-4) show the state at the end of the intake valve lift, and the state of the variable valve operating apparatus 1 shown in FIG. The case where the center axis line AX2 of the hole 8a is at the reference position coincident with the end face height of the cap 12 is shown.

  The drive arm portion 4 fixed to the drive shaft member 2 rotationally drives the cam shaft member 3 via the first link member 6a, the drive disk 5, and the second link member 6b.

  According to the variable valve operating apparatus of the embodiment, since the center axis AX of the drive shaft member 2 and the rotation center axis AX1 of the control sleeve 8 coincide with each other, the drive shaft member 2 and the control sleeve 8 are connected by the common cap 12. Supported by an internal combustion engine.

  The variable valve operating apparatus 1 of the present embodiment includes a first link member 6 a having one end connected to the drive arm unit 4 and the other end connected to the drive disk 5. Further, the variable valve operating apparatus 1 includes a second link member 6 b having one end connected to the cam shaft member 3 and the other end connected to the drive disk 5. In other words, the first link member 6a serving as the driving link and the second link member 6b serving as the driven link are coupled through the drive disk 5, and there are two coupling fulcrums between the driving link and the driven link. It is in a divided state. Thereby, the arm part 4b and the 1st link member 6a, and the cam lobe 3a provided with the 2nd link member 6b and the pin junction part 3b can be arranged away. Accordingly, even when the arm portion 4, the first link member 6a, the second link member 6b, and the drive disk 5 are arranged close to the cam lobe 3a, the arm portion 4 and the pin joint are joined when the cam shaft member 3 is rotating. Interference with the cam lobe 3a provided with the portion 3b can be suppressed.

  In the variable valve operating apparatus 1 of the present embodiment, since the first link member 6a and the second link member 6b are disposed on the first surface 5a1 side of the drive disk 5, a space is provided on the second surface 5a2 side of the drive disk 5. It can be secured. Moreover, since the 2nd link member 6a is connected to the pin junction part 3b provided in the cam lobe 3a with which the cam shaft member 3 is provided, it is easy to secure a space also in this respect. A bearing, that is, the third bearing 11 and the cap 12 can be arranged in the space thus secured. As described above, the cap 12 is common to the drive shaft member 2 and the control sleeve 8, and it is not necessary to prepare separately, so the number of parts can be reduced. Further, the assembling work can be facilitated accordingly, and the cost can be reduced.

  Moreover, the variable valve operating apparatus 1 of the present embodiment does not use sliding between the pin and the groove. In general, since the groove processing is costly, the variable valve operating apparatus 1 of the present embodiment is advantageous in this respect as well. Further, since there is no sliding between the pin and the groove, problems such as friction loss and wear in the apparatus are less likely to occur.

  The above embodiments are merely examples for carrying out the present invention. Therefore, the present invention is not limited to these, and various modifications and changes can be made within the scope of the gist of the present invention described in the claims.

DESCRIPTION OF SYMBOLS 1 Variable valve apparatus 2 Drive shaft member 2a VVT mounting part 2b Pulley part 2c Oil supply hole 2d Pin hole 3 Cam shaft member 3a Cam lobe 3a1 Nose part 3a2 Base circle part 3b Pin joint part 3b1 Pin insertion hole 4 Drive arm part 4a Tubular shape Part 4a1 Pin hole 4b Arm part 4b1 Pin insertion hole 5 Drive disk 5a Plate-like part 5a1 First surface 5a2 Second surface 5c1 First pin joint 5c11 First pin insertion hole 5c2 Second pin joint 5c21 Second pin insertion hole 5d cylindrical portion 6a first link member 6a1 pin insertion hole 6b second link member 6b1 pin insertion hole 7a first connection pin 7b second connection pin 7c third connection pin 7d fourth connection pin 8 control sleeve 8a eccentric hole 8a1 inside Peripheral wall surface 8b Gear portion 8c Cylindrical portion 9 First bearing 10 Second bearing 11 Third Bearings 12 cam cap 13 coupling pin 51 the rocker arm 52 rocker roller 53 intake valve 60 control shaft member 61 gear

Claims (5)

A drive shaft member that rotates in synchronization with a crankshaft included in the internal combustion engine;
A camshaft member having a cam lobe and rotatably provided around the drive shaft member;
A drive arm provided on the drive shaft member and rotating together with the drive shaft member;
A control sleeve provided with an eccentric hole, the drive shaft member being inserted through the eccentric hole, and a position of the central axis of the eccentric hole being changeable;
A rotating member that rotates along an inner peripheral wall surface of the eccentric hole;
A link member that transmits the rotation of the drive arm portion to the camshaft member via the rotating member,
The control sleeve includes a cylindrical portion having a central axis that coincides with the central axis of the drive shaft member, the drive shaft member is inserted inside the cylindrical portion, and the cylindrical portion, the drive shaft member, A bearing is interposed between
A variable valve operating apparatus in which a center axis of the drive shaft member inserted through the eccentric hole and a rotation center axis of the control sleeve are matched.   The link member includes a first link member having one end connected to the drive arm portion and the other end connected to the rotating member, and one end connected to the cam shaft member and the other end connected to the rotating member. The variable valve operating apparatus according to claim 1, comprising a connected second link member.   3. The variable movement according to claim 2, wherein a connection position of the first link member with respect to the rotating member and a connection position of the second link member with respect to the rotating member are set at positions separated by 180 ° in the rotating member. Valve device.   4. The variable valve operating apparatus according to claim 2, wherein the rotating member includes a plate-like portion, and the first link member and the second link member are arranged on one surface side of the plate-like portion.   The variable valve operating apparatus according to any one of claims 2 to 4, wherein the second link member is connected to a cam lobe included in the cam shaft member.

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