Variable valve mechanism and vehicle

Abstract

The invention discloses a variable valve mechanism and a vehicle, the variable valve mechanism comprises a main rocker arm and an auxiliary rocker arm, and the main rocker arm comprises a rocker arm body, a plunger and a coupling device. The plunger is in transmission connection with the auxiliary rocker arm, and the plunger is movably arranged on the rocker arm main body; the coupling device comprises a coupling arm, the coupling arm is rotatably connected with the rocker arm body, the coupling arm has a connection state and a separation state relative to the plunger, the coupling arm in the connection state is connected with the plunger, and the rocker arm body is in transmission connection with the plunger. And the coupling arm in the separation state is separated from the plunger. According to the variable valve mechanism, the collision damage probability of the main rocker arm and the auxiliary rocker arm can be reduced, and the expression precision of the valve lift of the auxiliary cam can be improved.

Description

Technical Field

[0001] This application relates to the field of engine valve train technology, and more particularly to a variable valve mechanism and vehicle. Background Technology

[0002] A variable valve timing mechanism is a mechanism in an engine's valve train used to adjust valve lift. In existing technology, one end of the main rocker arm of the variable valve timing mechanism is driven by the main camshaft, and the other end contacts the valve or valve bridge. One end of the secondary rocker arm is driven by the secondary camshaft, and the other end can form or disconnect a drive connection with the main rocker arm. When the secondary rocker arm is disconnected from the main rocker arm, the main rocker arm is driven by the main camshaft, thus expressing the valve lift of the main camshaft. When the secondary rocker arm is driven by the main rocker arm, the secondary rocker arm is driven by the secondary camshaft, and the main rocker arm is driven by the secondary rocker arm, thus expressing the valve lift of the secondary camshaft.

[0003] In existing variable valve timing mechanisms, a large clearance is maintained between the main rocker arm and the auxiliary rocker arm, and a hydraulic piston is mounted on the main rocker arm. When the hydraulic piston retracts, the clearance between the main and auxiliary rocker arms prevents the auxiliary rocker arm from contacting the main rocker arm, thus disengaging the transmission connection between them. When the hydraulic piston extends, the auxiliary rocker arm abuts against the hydraulic piston, thereby establishing a transmission connection between the main and auxiliary rocker arms.

[0004] However, in existing technologies, the relative positions of the hydraulic piston and the auxiliary rocker arm are random during the movement of the hydraulic piston towards the target position. As the distance between the auxiliary rocker arm and the hydraulic piston decreases, they are prone to collision, leading to easy damage to the main rocker arm and auxiliary rocker arm in existing technologies. Moreover, when hydraulic pistons come into contact, the hydraulic medium driving the hydraulic pistons is compressed under pressure, resulting in a loss of lift and thus lower accuracy in expressing the valve lift of the auxiliary camshaft. Summary of the Invention

[0005] The purpose of this application is to at least solve the problems of easy impact damage to the main rocker arm and auxiliary rocker arm in the prior art, and the low accuracy of the valve lift expression of the auxiliary cam in the prior art. This purpose is achieved by the following means: The first aspect of this application discloses a variable valve mechanism, including a main rocker arm and a secondary rocker arm. The main rocker arm comprises a rocker arm body, a plunger, and a coupling device. The plunger is drivenly connected to the secondary rocker arm and is movably disposed on the rocker arm body. The coupling device includes a coupling arm, which is rotatably connected to the rocker arm body. The coupling arm has a connected state and a disconnected state relative to the plunger. In the connected state, the coupling arm is connected to the plunger, forming a drive connection between the rocker arm body and the plunger. In the disconnected state, the coupling arm is separated from the plunger.

[0006] In the variable valve mechanism of this application embodiment, the plunger and the auxiliary rocker arm are connected by a transmission, thereby avoiding any gap between the auxiliary rocker arm and the plunger, and thus reducing the probability of collision between the main rocker arm and the auxiliary rocker arm. When the coupling arm is in the connected and disconnected states, the relative positions between the coupling arm, the plunger, and the auxiliary rocker arm are determined, further reducing the probability of collision between the main rocker arm and the auxiliary rocker arm. Moreover, the rigid connection between the plunger and the coupling arm avoids the problem of fluid volume compression, thereby reducing lift loss and improving the accuracy of the valve lift expression of the auxiliary cam.

[0007] In some embodiments, the plunger has a connection hole, the coupling arm in the connected state is engaged in the connection hole, and the coupling arm in the separated state is located outside the connection hole. The coupling device further includes an ejection assembly, which is movably disposed in the plunger and configured to extend into the connection hole and eject the coupling arm out of the connection hole.

[0008] In some embodiments, the plunger has a mounting cavity connected to the connection hole, and the ejection assembly includes an ejector movably disposed in the mounting cavity. The ejector has an ejected position and a retracted position relative to the connection hole. The ejector in the ejected position is located inside the connection hole and is configured to force the coupling arm outside the connection hole, while the ejector in the retracted position is located outside the connection hole.

[0009] In some embodiments, the main rocker arm further includes a hydraulic structure connected to the mounting cavity, the hydraulic structure being configured to pressurize the mounting cavity and drive the ejector to one of the ejected position and the retracted position; the ejector assembly further includes a first elastic member disposed within the mounting cavity, the first elastic member being in a deformed state and connected to the ejector, the first elastic member being configured to drive the ejector to the other of the ejected position and the retracted position when the hydraulic structure is depressurized from the mounting cavity.

[0010] In some embodiments, the ejector includes an ejector portion and a drive portion, the drive portion being circumferentially disposed outside the ejector portion, the ejector portion enclosing the connection space between the mounting cavity and the connection hole, and an injection space being defined between the outer peripheral wall of the ejector portion, the outer peripheral wall of the drive portion near the connection hole, and the inner peripheral wall of the mounting cavity near the connection hole, and the hydraulic structure being configured to pressurize the injection space and drive the ejector to a retracted position.

[0011] In some embodiments, the mounting cavity has an opening at one end opposite to the connecting hole, the plunger includes a baffle disposed in the mounting cavity and closing the opening, the ejector portion has a mounting channel, one end of the first elastic member is located inside the mounting channel and abuts against the ejector portion, the other end of the first elastic member is located outside the mounting channel and abuts against the baffle, and the first elastic member is configured to be in a compressed state when the hydraulic structure is depressurized from the injection space and drive the ejector portion to the ejected position.

[0012] In some embodiments, the coupling arm includes a reset portion, a hinge portion, and a snap-fit ​​portion connected in sequence. When the coupling arm is in the connected state, the snap-fit ​​portion snaps into the connection hole. The hinge portion is hinged to the rocker arm body. The reset portion is located on the side of the hinge portion away from the snap-fit ​​portion. The coupling device further includes a second elastic member sandwiched between the reset portion and the rocker arm body. The second elastic member is configured to be in a compressed state when the ejector assembly is outside the connection hole, and to drive the snap-fit ​​portion to snap into the connection hole.

[0013] In some embodiments, the secondary rocker arm abuts against the plunger, and when the coupling arm is in the separated state, the secondary rocker arm is configured to drive the plunger to move in the first direction when moving in the first direction; the coupling device further includes a third elastic element, which is sandwiched between the rocker arm body and the plunger and located on the side of the plunger away from the secondary rocker arm. The third elastic element is configured to be in a compressed state when the secondary rocker arm moves in the second direction and to drive the plunger to press against the secondary rocker arm, wherein the first direction and the second direction are opposite.

[0014] In some embodiments, the secondary rocker arm further includes a rocker arm body, an abutment, and an adjusting threaded member. The abutment is connected to the rocker arm body, the adjusting threaded member extends in a first direction, the adjusting threaded member is threadedly connected to the abutment and passes through the abutment, and the adjusting threaded member abuts against the plunger in the first direction.

[0015] The second aspect of this application provides a vehicle comprising: a variable valve mechanism as described in the first aspect above.

[0016] The vehicle of this application includes the variable valve mechanism as described in the first aspect above. A drive connection is established between the plunger and the secondary rocker arm, thereby preventing any gap between them and reducing the probability of impact between the main rocker arm and the secondary rocker arm. When the coupling arm is in the connected or disconnected state, the relative positions of the coupling arm, plunger, and secondary rocker arm are determined, further reducing the probability of impact between the main rocker arm and the secondary rocker arm. This reduces the probability of vehicle damage in this embodiment. Furthermore, the rigid connection between the plunger and the coupling arm avoids the problem of fluid volume compression, thereby reducing lift loss and improving the accuracy of the valve lift expression of the secondary camshaft, thus improving the performance of the vehicle in this embodiment. Attached Figure Description

[0017] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. Wherein: Figure 1 This is a schematic diagram of a variable valve mechanism according to an embodiment of this application, wherein the main rocker arm and the auxiliary rocker arm are connected by a transmission. Figure 2 This is a schematic diagram of a variable valve mechanism according to an embodiment of this application, wherein the transmission connection between the main rocker arm and the auxiliary rocker arm is disconnected; Figure 3 This is a schematic diagram of the main rocker arm according to an embodiment of this application; Figure 4 This is an exploded view of the main rocker arm according to an embodiment of this application; Figure 5 This is a half-sectional view of the main rocker arm according to an embodiment of this application, wherein the ejector is located in the ejection position and the snap-fit ​​portion is opposite to the connecting hole; Figure 6 This is a half-sectional view of the main rocker arm according to an embodiment of this application, wherein the ejector is located in the ejection position, and the snap-fit ​​part is offset from the outside of the connecting hole; Figure 7 This is a half-sectional view of the main rocker arm according to an embodiment of this application, wherein the ejector is in the retracted position; Figure 8 This is a schematic diagram of the rocker arm body according to an embodiment of this application; Figure 9 This is a half-sectional view of the rocker arm body according to an embodiment of this application; Figure 10 This is a schematic diagram of the plunger and ejection assembly according to an embodiment of this application; Figure 11 This is a schematic diagram of the plunger according to an embodiment of this application; Figure 12This is a half-sectional view of the plunger according to an embodiment of this application; Figure 13 This is a schematic diagram of the ejector component according to an embodiment of this application; Figure 14 This is a half-sectional view of the ejector component according to an embodiment of this application; Figure 15 This is a schematic diagram of a vehicle according to an embodiment of this application.

[0018] The labels in the attached diagram are as follows: 1000, vehicles; 100. Variable valve timing mechanism; 10. Main rocker arm; 11. Rocker arm body; 111. Elephant foot end; 112. First roller end; 113. Rocker arm hole; 114. Mounting part; 1141. Plunger hole; 1142. Clearance hole; 115. Blocking component; 116. Hinge seat; 12. Plunger; 121. Connecting hole; 122. Mounting cavity; 1221. Connecting space; 1222. Injection space; 123. Baffle; 124. Hydraulic hole; 125. First plunger section; 126. Second plunger section; 13. Coupling device; 131. Coupling arm; 1311. Reset part; 1312. Hinge part; 1313. Snap-fit ​​part; 132. Ejection assembly; 1321. Ejector; 1322. Ejection part; 1323. Drive part; 1324. Mounting channel; 1325. First elastic element; 133. Second elastic element; 134. Third elastic element; 14. Hydraulic structure; 20. Secondary rocker arm; 21. Rocker arm body; 22. Abutment part; 23. Adjusting threaded part; 30. First roller; 40. Second roller; 50. Rocker arm shaft; 200, main cam; 300, secondary cam; a) First direction; b) Second direction. Detailed Implementation

[0019] Exemplary embodiments of this application will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of this application are shown in the drawings, it should be understood that this application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of this application and to fully convey the scope of this application to those skilled in the art.

[0020] A variable valve timing mechanism is a mechanism in an engine's valve train used to adjust valve lift. In existing technology, the main rocker arm of the variable valve timing mechanism is driven to the main camshaft at one end and contacts the valve or valve bridge at the other end. The secondary rocker arm is driven to the secondary camshaft at one end and can form or disconnect a drive connection with the main rocker arm at the other end. When the secondary rocker arm is disconnected from the main rocker arm, the main camshaft drives the main rocker arm, thus expressing the valve lift of the main camshaft. When the secondary rocker arm is driven to the main rocker arm, the secondary camshaft drives the secondary rocker arm, which in turn drives the main rocker arm. Because the lift profile of the secondary camshaft is more full than that of the main camshaft, the lift expression of the secondary camshaft covers the lift expression of the main camshaft, thus allowing the main camshaft to express the valve lift of the secondary camshaft.

[0021] In existing variable valve timing mechanisms, a large clearance is maintained between the main rocker arm and the auxiliary rocker arm, and a hydraulic piston is mounted on the main rocker arm. When the hydraulic piston retracts, the clearance between the main and auxiliary rocker arms prevents the auxiliary rocker arm from contacting the main rocker arm, thus disengaging the transmission connection between them. When the hydraulic piston extends, the auxiliary rocker arm abuts against the hydraulic piston, thereby establishing a transmission connection between the main and auxiliary rocker arms.

[0022] However, in existing technologies, the relative positions of the hydraulic piston and the auxiliary rocker arm are random during the movement of the hydraulic piston towards the target position; that is, the relative positions of the hydraulic piston and the auxiliary rocker arm are unknown. As the distance between the auxiliary rocker arm and the hydraulic piston decreases, they are prone to collision, leading to easy impact damage to the main rocker arm and the auxiliary rocker arm in existing technologies. Moreover, when hydraulic pistons come into contact, the hydraulic medium driving the hydraulic pistons is compressed under pressure, resulting in a loss of lift and thus lower accuracy in expressing the valve lift of the auxiliary camshaft.

[0023] In order to at least solve the problems of easy impact damage to the main rocker arm and the secondary rocker arm in the prior art, and the low accuracy of the valve lift expression of the secondary cam in the prior art, the embodiments of this application propose a variable valve mechanism that can reduce the probability of impact damage to the main rocker arm and the secondary rocker arm, and can improve the accuracy of the valve lift expression of the secondary cam.

[0024] Embodiments of this application also propose a vehicle including the variable valve mechanism described in the above embodiments.

[0025] The variable valve mechanism 100 and vehicle 1000 of this application are described below with reference to the accompanying drawings.

[0026] Combination Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7As shown, the variable valve mechanism 100 of this application embodiment includes a main rocker arm 10 and a secondary rocker arm 20. The main rocker arm 10 includes a rocker arm body 11, a plunger 12, and a coupling device 13. The plunger 12 is drivenly connected to the secondary rocker arm 20 and is movably disposed on the rocker arm body 11. The coupling device 13 includes a coupling arm 131, which is rotatably connected to the rocker arm body 11. The coupling arm 131 has a connected state and a disconnected state relative to the plunger 12. When the coupling arm 131 is in the connected state, it is connected to the plunger 12, and the rocker arm body 11 and the plunger 12 are drivenly connected. When the coupling arm 131 is in the disconnected state, it is separated from the plunger 12.

[0027] Combination Figure 2 , Figure 5 and Figure 6 As shown, the coupling arm 131 in the separated state is separated from the plunger 12, and the plunger 12 can move relative to the rocker arm body 11, thereby disconnecting the transmission connection between the auxiliary rocker arm 20 and the main rocker arm 10, thus preventing the auxiliary rocker arm 20 from driving the main rocker arm 10.

[0028] Combination Figure 1 and Figure 7 As shown, the coupling arm 131, which is in the connected state, is connected to the plunger 12. The coupling arm 131 can restrict the relative movement of the plunger 12 to the rocker arm body 11 and enable the plunger 12 to move synchronously with the rocker arm body 11, thereby forming a transmission connection between the secondary rocker arm 20 and the main rocker arm 10, and thus enabling the secondary rocker arm 20 to drive the main rocker arm 10 to move.

[0029] The auxiliary rocker arm 20 drives the plunger 12 to reciprocate. That is, under the driving action of the auxiliary rocker arm 20, the plunger 12 can periodically be in a position suitable for connection with the coupling arm 131. When the coupling arm 131 switches from a separated state to a connected state, the coupling arm 131 rotates to a position suitable for connection with the plunger 12. When the plunger 12 moves to a position suitable for connection with the coupling arm 131, the coupling arm 131 connects with the plunger 12, thereby enabling the coupling arm 131 to switch from a separated state to a connected state.

[0030] When the coupling arm 131 switches from the connected state to the disconnected state, the coupling arm 131 rotates to the position where it is separated from the plunger 12, and the plunger 12 can move relative to the rocker arm body 11, thereby enabling the coupling arm 131 to switch from the connected state to the disconnected state.

[0031] In the variable valve mechanism 100 of this application embodiment, the plunger 12 and the auxiliary rocker arm 20 are connected by a transmission, thereby avoiding any gap between the auxiliary rocker arm 20 and the plunger 12, and thus reducing the probability of collision between the main rocker arm 10 and the auxiliary rocker arm 20. When the coupling arm 131 is in the connected state and the disconnected state, the relative positions between the coupling arm 131, the plunger 12, and the auxiliary rocker arm 20 are determined, thereby further reducing the probability of collision between the main rocker arm 10 and the auxiliary rocker arm 20. Moreover, the rigid connection between the plunger 12 and the coupling arm 131 can avoid the problem of fluid volume compression, thereby reducing the lift loss and improving the accuracy of the valve lift expression of the auxiliary cam 300.

[0032] Combination Figure 1 , Figure 2 , Figure 8 and Figure 9 As shown, in some specific embodiments, the variable valve mechanism 100 further includes a first roller 30 and a rocker arm shaft 50. The rocker arm body 11 is provided with a rocker arm hole 113, and the rocker arm shaft 50 passes through the rocker arm hole 113. The rocker arm body 11 is rotatably mounted on the rocker arm shaft 50 through the rocker arm hole 113. The rocker arm body 11 includes an elephant foot end 111 and a first roller end 112. The elephant foot end 111 is used to connect with a valve or valve bridge. The first roller 30 is rotatably mounted on the first roller end 112 and abuts against the main cam 200.

[0033] When the main cam 200 rotates, it drives the first roller 30 to rotate and drives the rocker arm body 11 to rotate around the rocker arm shaft 50, thereby driving the elephant foot end 111 to rotate. The elephant foot end 111 is connected to the valve or valve bridge, thereby enabling the adjustment of valve lift.

[0034] Combination Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 9 As shown, in some specific embodiments, the rocker arm body 11 includes a mounting portion 114, which defines a plunger hole 1141, and the plunger 12 is movably disposed in the plunger hole 1141.

[0035] The plunger hole 1141 can guide and limit the plunger 12, so that the movement of the plunger 12 can be more precise.

[0036] Combination Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 9 As shown, in some specific embodiments, one end of the plunger hole 1141 is formed into an opening, and the rocker arm body 11 also includes a blocking member 115, which is disposed at the end of the plunger hole 1141 and is used to restrict the plunger 12 from disengaging from the plunger hole 1141.

[0037] One end of the plunger hole 1141 is formed into an opening, which facilitates the installation of the plunger 12 into the plunger hole 1141 during production, thereby reducing the difficulty of installing the plunger 12. The stopper 115 can limit the plunger 12, thereby preventing the plunger 12 from abnormally dislodging from the plunger hole 1141.

[0038] Combination Figure 5 , Figure 6 , Figure 7 , Figure 11 and Figure 12 As shown, in some specific embodiments, the plunger 12 includes a first plunger section 125 and a second plunger section 126 connected to each other. The inner and outer dimensions of the first plunger section 125 are larger than the inner and outer dimensions of the second plunger section 126. The first plunger section 125 is located inside the plunger bore 1141 and can abut against the blocking member 115. The second plunger section 126 passes through the blocking member 115. A part of the second plunger section 126 is located inside the plunger bore 1141 and is connected to the first plunger section 125. Another part of the second plunger section 126 is located outside the plunger bore 1141 and is connected to the auxiliary rocker arm 20.

[0039] The range of motion of the first plunger section 125 is limited within the plunger bore 1141 by the inner wall of the plunger bore 1141 and the blocking member 115, thereby enabling it to connect and disconnect from the coupling arm 131. The second plunger section 126 can extend out of the plunger bore 1141 and connect to the auxiliary rocker arm 20, thereby driving the first plunger section 125 to move.

[0040] By setting the first plunger section 125 and the second plunger section 126, the movement range of the plunger 12 can be limited, making the movement range of the plunger 12 controllable, and the plunger 12 can be connected to the auxiliary rocker arm 20 for transmission. Thus, the structural rationality of the plunger 12 can be increased.

[0041] Combination Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 9 As shown, in some specific embodiments, the mounting portion 114 is provided with a clearance hole 1142, which communicates with the plunger hole 1141. The coupling arm 131 is located outside the mounting portion 114, and a portion of the coupling arm 131 is configured to extend into the plunger hole 1141 through the clearance hole 1142.

[0042] The coupling arm 131 can be bypassed by the clearance hole 1142, so that the coupling arm 131 located outside the mounting part 114 can be connected to the plunger 12 located inside the mounting part 114, thereby increasing the rationality of the structure.

[0043] Combination Figure 5 , Figure 6 , Figure 7 and Figure 10 As shown, in some embodiments, the plunger 12 is provided with a connection hole 121, the coupling arm 131 in the connected state is snapped into the connection hole 121, and the coupling arm 131 in the separated state is located outside the connection hole 121. The coupling device 13 also includes an ejection assembly 132, which is movably disposed in the plunger 12. The ejection assembly 132 is configured to extend into the connection hole 121 and eject the coupling arm 131 out of the connection hole 121.

[0044] By providing the connection hole 121, the coupling arm 131 can be limited, thereby allowing the coupling arm 131 to be more securely connected to the plunger 12, thus increasing the stability of the connection between the plunger 12 and the coupling arm 131.

[0045] The ejector assembly 132 extends into the connection hole 121 and acts directly on the coupling arm 131, thereby ejecting the coupling arm 131 out of the connection hole 121 and enabling the coupling arm 131 to be stably separated from the plunger 12.

[0046] The ejector assembly 132 is disposed inside the plunger 12. The ejector assembly 132 can be installed through the plunger 12, thereby improving the integration of the plunger 12 and the ejector assembly 132, which is beneficial to the miniaturization of the variable valve mechanism 100 of this application embodiment.

[0047] When the ejector assembly 132 ejects the coupling arm 131, it is located within the connection hole 121. The connection hole 121 protects the ejector assembly 132, thereby extending its service life. The fact that the ejector assembly 132 is located within the connection hole 121 also prevents it from extending beyond the plunger 12, thus avoiding interference between the ejector assembly 132 and other components, thereby increasing the stability of the variable valve mechanism 100 in this embodiment.

[0048] Combination Figure 5 , Figure 6 , Figure 7 , Figure 10 , Figure 13 and Figure 14 As shown, in some embodiments, the plunger 12 is provided with a mounting cavity 122 connected to the connection hole 121, and the ejection assembly 132 includes an ejector 1321, which is movably disposed in the mounting cavity 122. The ejector 1321 has an ejected position and a retracted position relative to the connection hole 121. The ejector 1321 in the ejected position is located inside the connection hole 121 and is configured to force the coupling arm 131 to be located outside the connection hole 121. The ejector 1321 in the retracted position is located outside the connection hole 121.

[0049] It should be noted that the protruding position can be one or more positions, and this application embodiment does not impose specific limitations. Similarly, the retracting position can be one or more positions, and this application embodiment does not impose specific limitations.

[0050] When the ejector 1321 is in the ejected position, it is located inside the connecting hole 121. In the ejected position, either all or part of the ejector 1321 may be located inside the connecting hole 121. When the ejector 1321 is in the retracted position, it is located outside the connecting hole 121. That is, when in the retracted position, all of the ejector 1321 is located inside the mounting cavity 122.

[0051] Both the ejector 1321 in the extended position and the ejector 1321 in the retracted position are located within the plunger 12. The plunger 12 protects the ejector 1321, thereby extending its service life. By keeping the ejector 1321 within the plunger 12, it prevents the ejector 1321 from extending beyond the plunger 12, thus avoiding interference between the ejector 1321 and other components, thereby increasing the stability of the variable valve mechanism 100 of this embodiment.

[0052] The mounting cavity 122 can accommodate the ejector 1321, thereby improving the integration of the plunger 12 and the ejector assembly 132, which in turn facilitates the miniaturization of the variable valve mechanism 100 of the present application embodiment.

[0053] By connecting the mounting cavity 122 to the connecting hole 121, at least a portion of the ejector 1321 can move directly into the connecting hole 121, thereby enabling the ejector 1321 to directly contact the coupling arm 131, thus reducing the loss of ejection force and allowing the coupling arm 131 to be ejected stably.

[0054] Combination Figure 5 , Figure 6 , Figure 7 and Figure 9 As shown, in some embodiments, the main rocker arm 10 further includes a hydraulic structure 14 connected to the mounting cavity 122. The hydraulic structure 14 is configured to pressurize the mounting cavity 122 and drive the ejector 1321 to one of an ejected position and a retracted position. The ejector assembly 132 further includes a first elastic element 1325 disposed in the mounting cavity 122. The first elastic element 1325 is in a deformed state and connected to the ejector 1321. The first elastic element 1325 is configured to drive the ejector 1321 to the other of an ejected position and a retracted position when the hydraulic structure 14 is depressurized from the mounting cavity 122.

[0055] The hydraulic structure 14 is configured to pressurize the mounting cavity 122 and drive the ejector 1321 to either an ejected or retracted position. The first elastic member 1325 is configured to drive the ejector 1321 to the other position when the hydraulic structure 14 is depressurized from the mounting cavity 122. Alternatively, the hydraulic structure 14 can be configured to pressurize the mounting cavity 122 and drive the ejector 1321 to the ejected position, while the first elastic member 1325 can be configured to drive the ejector 1321 to the retracted position when the hydraulic structure 14 is depressurized from the mounting cavity 122. Or, the hydraulic structure 14 can be configured to pressurize the mounting cavity 122 and drive the ejector 1321 to the retracted position, while the first elastic member 1325 can be configured to drive the ejector 1321 to the ejected position when the hydraulic structure 14 is depressurized from the mounting cavity 122.

[0056] The hydraulic structure 14 can press into the mounting cavity 122, thereby smoothly outputting power to the ejector 1321, causing the ejector 1321 to move stably. The first elastic element 1325 is in a deformed state. When the hydraulic structure 14 is depressurized, the ejector 1321 can quickly switch positions through the restoring force provided by the first elastic element 1325. Through the hydraulic structure 14 and the first elastic element 1325, the position of the ejector 1321 can be adjusted, thereby allowing the ejector 1321 to switch between the ejected position and the retracted position, and thus adjusting the state of the coupling arm 131.

[0057] As an example, the first elastic element 1325 is a spring.

[0058] Combination Figure 5 , Figure 6 , Figure 7 , Figure 9 , Figure 11 and Figure 12 As shown, in some specific embodiments, the plunger 12 is provided with a hydraulic hole 124, one end of which is connected to the mounting cavity 122, and the other end of which is connected to the hydraulic structure 14.

[0059] One end of the hydraulic hole 124 is connected to the mounting cavity 122, and the other end of the hydraulic hole 124 is connected to the hydraulic structure 14, so that the hydraulic structure 14 can be connected to the mounting cavity 122 through the hydraulic hole 124, thereby enabling the hydraulic structure 14 to pressurize the mounting cavity 122 or to depressurize the hydraulic structure 14 from the mounting cavity 122.

[0060] The hydraulic port 124 provides a channel for communication between the hydraulic structure 14 and the mounting cavity 122, thereby enabling the movement of the ejector 1321 to be controlled via the hydraulic structure 14.

[0061] Combination Figure 5 , Figure 6 , Figure 7 and Figure 9 As shown, in some specific embodiments, the hydraulic structure 14 and the hydraulic hole 124 are connected through a partial plunger hole 1141, and the plunger 12 is sealed to the inner wall of the plunger hole 1141.

[0062] The hydraulic structure 14 is connected through a partial plunger hole 1141. The hydraulic structure 14 can pressurize the hydraulic hole 124 through the partial plunger hole 1141 or depressurize the hydraulic hole 124 through the partial plunger hole 1141.

[0063] Hydraulic medium is transmitted through the plunger hole 1141, thereby improving structural utilization and reducing structural redundancy.

[0064] The hydraulic medium remaining on the inner wall of the plunger bore 1141 can also lubricate the movement of the plunger 12, thereby reducing the probability of the plunger 12 getting stuck in the plunger bore 1141.

[0065] As an example, the medium transmitted by the hydraulic structure 14 is hydraulic oil.

[0066] Combination Figure 5 , Figure 6 and Figure 7 As shown, in some specific embodiments, the hydraulic structure 14 is a liquid delivery channel, and the coupling device 13 also includes a hydraulic pump. The liquid delivery channel and the hydraulic pump can be connected on and off, and the liquid delivery channel is connected to the mounting cavity 122.

[0067] By setting up a hydraulic pump and a liquid delivery pipeline, and making the liquid delivery channel and the hydraulic pump connectable and disconnectable, the hydraulic pump can pressurize the mounting cavity 122 through the liquid delivery channel or depressurize from the mounting cavity 122, thereby realizing the control of the ejector 1321.

[0068] Combination Figure 5 , Figure 6 , Figure 7 and Figure 10 As shown, in some embodiments, the ejector 1321 includes an ejector portion 1322 and a drive portion 1323. The drive portion 1323 is arranged around the ejector portion 1322. The ejector portion 1322 closes the connection space 1221 between the mounting cavity 122 and the connection hole 121. A liquid injection space 1222 is defined between the outer peripheral wall of the ejector portion 1322, the outer peripheral wall of the drive portion 1323 near the connection hole 121, and the inner peripheral wall of the mounting cavity 122 near the connection hole 121. The hydraulic structure 14 is configured to pressurize the liquid injection space 1222 and drive the ejector 1321 to the retracted position.

[0069] As an example, the outer peripheral wall of the drive unit 1323 near the connection hole 121 is as follows: Figure 10 As shown at point d in the middle.

[0070] As an example, the inner peripheral wall of the mounting cavity 122 near the connection hole 121 is as follows: Figure 10 As shown at point c in the middle.

[0071] As an example, the outer peripheral wall of the ejector portion 1322 is as follows: Figure 10 As shown at point e in the middle.

[0072] When the hydraulic structure 14 pressurizes the injection space 1222, the hydraulic medium is injected into the injection space 1222. The hydraulic medium squeezes the outer peripheral wall of the drive part 1323 near the connecting hole 121 and the inner peripheral wall of the mounting cavity 122 near the connecting hole 121, thereby causing the drive part 1323 to move away from the inner peripheral wall of the mounting cavity 122 near the connecting hole 121. This causes the ejector 1321 to move towards the inner peripheral wall of the mounting cavity 122 near the connecting hole 121, so that the ejector 1321 moves in the direction of disengaging from the connecting hole 121 or away from the connecting hole 121, thereby driving the ejector 1321 to the retracted position.

[0073] In this embodiment, the variable valve mechanism 100 defines an injection space 1222 between the outer peripheral wall of the ejector portion 1322, the outer peripheral wall of the drive portion 1323 near the connection hole 121, and the inner peripheral wall of the mounting cavity 122 near the connection hole 121. This causes the ejector portion 1321 to move in a direction away from or away from the connection hole 121 when the hydraulic structure 14 injects liquid into the injection space 1222, thereby driving the ejector portion 1321 to be in the retracted position.

[0074] By sealing the connection space 1221 between the mounting cavity 122 and the connection hole 121 through the ejector portion 1322, hydraulic medium can be prevented from entering the connection hole 121, thereby preventing hydraulic medium leakage. Moreover, by preventing hydraulic medium from entering the connection hole 121, the hydraulic medium can also be prevented from affecting the connection strength between the coupling arm 131 and the connection hole 121, thereby improving the connection stability between the coupling arm 131 and the connection hole 121.

[0075] Combination Figure 5 , Figure 6 , Figure 7 and Figure 10As shown, in some embodiments, the mounting cavity 122 has an opening at one end opposite to the connecting hole 121. The plunger 12 includes a baffle 123, which is disposed in the mounting cavity 122 and closes the opening. The ejector portion 1322 is provided with a mounting channel 1324. One end of the first elastic member 1325 is located inside the mounting channel 1324 and abuts against the ejector portion 1322. The other end of the first elastic member 1325 is located outside the mounting channel 1324 and abuts against the baffle 123. The first elastic member 1325 is configured to be in a compressed state when the hydraulic structure 14 is depressurized from the mounting cavity 122, and to drive the ejector portion 1321 to the ejected position.

[0076] One end of the first elastic member 1325 is located inside the mounting channel 1324 and abuts against the ejector portion 1322. The other end of the first elastic member 1325 is located outside the mounting channel 1324 and abuts against the baffle 123. In other words, the first elastic member 1325 is sandwiched between the baffle 123 and at least part of the ejector portion 1322.

[0077] When the hydraulic structure 14 is depressurized from the mounting cavity 122, the first elastic element 1325 is in a compressed state. The first elastic element 1325 drives the ejector 1321 to move away from the baffle 123, thereby causing the ejector 1321 to move closer to or deeper into the connecting hole 121 as it moves away from the baffle 123. Thus, by adjusting the positions of the first elastic element 1325, the baffle 123, and the ejector 1321, it is possible to achieve that when the hydraulic structure 14 is depressurized from the mounting cavity 122, the first elastic element 1325 drives the ejector 1321 to be in the ejected position.

[0078] During the production and assembly of the variable valve mechanism 100 of this embodiment, an opening is formed at one end of the mounting cavity 122 away from the connecting hole 121, which allows the ejector 1321 and the first elastic member 1325 to be installed in the mounting cavity 122. The baffle 123 can limit the ejector 1321 and the first elastic member 1325, thereby preventing the ejector 1321 and the first elastic member 1325 from abnormally detaching from the mounting cavity 122.

[0079] A portion of the first elastic element 1325 is disposed within the mounting channel 1324. The sidewall of the mounting channel 1324 can limit the first elastic element 1325 in the inward and outward directions of the mounting channel 1324, thereby enabling the first elastic element 1325 to be pre-shaped and reducing the probability of abnormal deformation of the first elastic element 1325. In addition, the mounting channel 1324 can install the first elastic element 1325, thereby reducing the probability of abnormal misalignment of the first elastic element 1325.

[0080] In other embodiments, a fluid injection space 1222 is defined between the outer peripheral wall of the drive unit 1323 on the side opposite to the connection hole 121 and the baffle 123. The hydraulic structure 14 is configured to pressurize the fluid injection space 1222 and drive the ejector 1321 to the extended position. A first elastic member 1325 is sleeved on the ejector 1322, with one end abutting against the outer peripheral wall of the drive unit 1323 near the connection hole 121, and the other end abutting against the inner peripheral wall of the mounting cavity 122 near the connection hole 121. The first elastic member 1325 is configured to be compressed when the hydraulic structure 14 is depressurized from the fluid injection space 1222, and drive the ejector 1321 to the retracted position.

[0081] As an example, the outer peripheral wall of the drive unit 1323 near the connection hole 121 is as follows: Figure 10 As shown at point d in the middle.

[0082] As an example, the inner peripheral wall of the mounting cavity 122 near the connection hole 121 is as follows: Figure 10 As shown at point c in the middle.

[0083] As an example, the outer peripheral wall of the drive unit 1323 on the side opposite to the connection hole 121 is as follows: Figure 10 As shown at point f in the middle.

[0084] The outer peripheral wall of the drive unit 1323 on the side away from the connection hole 121 and the baffle 123 define a liquid injection space 1222. When the hydraulic structure 14 is pressing, the hydraulic medium can drive the outer peripheral wall of the drive unit 1323 on the side away from the connection hole 121 away from the baffle 123, thereby driving the ejector 1321 to move towards or into the connection hole 121, and thus driving the ejector 1321 to be in the ejected position.

[0085] One end of the first elastic member 1325 abuts against the outer peripheral wall of the driving part 1323 near the connecting hole 121, and the other end of the first elastic member 1325 abuts against the inner peripheral wall of the mounting cavity 122 near the connecting hole 121. That is, the first elastic member 1325 is sandwiched between the outer peripheral wall of the driving part 1323 near the connecting hole 121 and the inner peripheral wall of the mounting cavity 122 near the connecting hole 121.

[0086] When the hydraulic structure 14 is depressurized from the injection space 1222, the first elastic element 1325 is in a compressed state, and the driving part 1323 moves toward the inner peripheral wall of the side away from the mounting cavity 122 and closer to the connecting hole 121, thereby causing the ejector 1321 to move away from the connecting hole 121 or away from the connecting hole 121, thereby driving the ejector 1321 to the retracted position.

[0087] Combination Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, in some embodiments, the coupling arm 131 includes a reset part 1311, a hinge part 1312, and a snap-fit ​​part 1313 connected in sequence. When the coupling arm 131 is in the connected state, the snap-fit ​​part 1313 is snapped into the connection hole 121. The hinge part 1312 is hinged to the rocker arm body 11. The reset part 1311 is located on the side of the hinge part 1312 away from the snap-fit ​​part 1313. The coupling device 13 also includes a second elastic member 133. The second elastic member 133 is sandwiched between the reset part 1311 and the rocker arm body 11. The second elastic member 133 is configured to be in a compressed state when the ejector assembly 132 is outside the connection hole 121, and drive the snap-fit ​​part 1313 to snap into the connection hole 121.

[0088] The reset part 1311 is located on the side of the hinge part 1312 away from the snap-fit ​​part 1313, that is, the hinge part 1312 is located between the reset part 1311 and the snap-fit ​​part 1313.

[0089] When the ejector assembly 132 is located outside the connecting hole 121, the second elastic member 133 is in a compressed state. The second elastic member 133 is sandwiched between the reset part 1311 and the rocker arm body 11. The second elastic member 133 drives the reset part 1311 to rotate away from the rocker arm body 11. Since the reset part 1311 is located on the side of the hinge part 1312 away from the locking part 1313, when the reset part 1311 rotates away from the rocker arm body 11, the locking part 1313 rotates towards the rocker arm body 11.

[0090] The variable valve mechanism 100 of this application embodiment, through the positional arrangement of the reset part 1311, the hinge part 1312, the locking part 1313 and the second elastic member 133, can drive the locking part 1313 to lock into the connection hole 121 when the ejector assembly 132 is outside the connection hole 121.

[0091] In addition, the hinge 1312 can provide a stable pivot point for the coupling arm 131, thereby making the movement of the coupling arm 131 precise and reliable.

[0092] As an example, the second elastic element 133 is a spring.

[0093] like Figure 9 As shown, in some specific embodiments, the rocker arm body 11 further includes a hinge seat 116, which is connected to the mounting part 114 and is hinged to the hinge part 1312.

[0094] The hinge seat 116 provides a stable hinge carrier for the hinge part 1312, thereby enabling the hinge part 1312 to rotate more accurately.

[0095] Combination Figure 1 , Figure 2 , Figure 5 , Figure 6 and Figure 7 As shown, in some embodiments, the secondary rocker arm 20 abuts against the plunger 12. When the coupling arm 131 is in a separated state, the secondary rocker arm 20 is configured to drive the plunger 12 to move in the first direction a when it moves in the first direction a. The coupling device 13 also includes a third elastic member 134, which is sandwiched between the rocker arm body 11 and the plunger 12 and is located on the side of the plunger 12 away from the secondary rocker arm 20. The third elastic member 134 is configured to be in a compressed state when the secondary rocker arm 20 moves in the second direction b, and to drive the plunger 12 to press against the secondary rocker arm 20. The first direction a and the second direction b are opposite.

[0096] It should be noted that the movement of the secondary rocker arm 20 in the first direction a means that the direction of movement of the secondary rocker arm 20 is parallel to the first direction a, or that the direction of movement of the secondary rocker arm 20 has a projection on the first direction a. The movement of the secondary rocker arm 20 in the second direction b means that the direction of movement of the secondary rocker arm 20 is parallel to the second direction b, or that the direction of movement of the secondary rocker arm 20 has a projection on the second direction b.

[0097] The third elastic element 134 can drive the plunger 12 to press against the secondary rocker arm 20 when the secondary rocker arm 20 moves in the first direction a and the second direction b, thereby enabling the third elastic element 134 to exert a limiting effect on the secondary rocker arm 20 and thus reducing the probability of abnormal oscillation of the secondary rocker arm 20. By limiting the secondary rocker arm 20 with the third elastic element 134, it is possible to avoid setting additional limiting elements for limiting the movement of the secondary rocker arm 20, thereby reducing the complexity of the variable valve mechanism 100 of this application embodiment.

[0098] The third elastic element 134 can buffer and absorb shock when the secondary rocker arm 20 moves in the first direction a, thereby reducing the impact force of the secondary rocker arm 20 on the plunger 12.

[0099] The third elastic element 134, the plunger 12, and the auxiliary rocker arm 20 enable a transmission connection between the plunger 12 and the auxiliary rocker arm 20.

[0100] As an example, the third elastic element 134 is a spring.

[0101] like Figure 2 As shown, in some embodiments, the secondary rocker arm 20 further includes a rocker arm body 21, an abutment member 22, and an adjusting thread member 23. The abutment member 22 is connected to the rocker arm body 21, the adjusting thread member 23 extends in the first direction a, the adjusting thread member 23 is threadedly connected to the abutment member 22 and passes through the abutment member 22, and the adjusting thread member 23 abuts against the plunger 12 in the first direction a.

[0102] The extension of the adjusting threaded part 23 in the first direction a means that the length direction of the adjusting threaded part 23 is parallel to the first direction a, or that the adjusting threaded part 23 has a projection in the first direction a, that is, the length direction of the adjusting threaded part 23 is not perpendicular to the first direction a.

[0103] By turning the adjusting thread 23, the position of the adjusting thread 23 relative to the abutment 22 in the first direction a can be changed, thereby adjusting the gap between the abutment 22 and the plunger 12.

[0104] Combination Figure 1 and Figure 2 As shown, in some specific embodiments, the variable valve mechanism 100 further includes a second roller 40, which is rotatably mounted on one end of the rocker arm body 21 and is used to abut against the auxiliary cam 300. The rocker arm body 21 is rotatably disposed on the rocker arm shaft 50.

[0105] When the secondary cam 300 rotates, it drives the second roller 40 to rotate and drives the rocker arm body 21 to rotate around the rocker arm shaft 50, thereby driving the abutment 22 to rotate. Thus, when the secondary rocker arm 20 is connected to the main rocker arm 10, the main rocker arm 10 can express the valve lift of the secondary cam 300.

[0106] like Figure 15 As shown, the vehicle 1000 of this application embodiment includes: the variable valve mechanism 100 as described in the above embodiment.

[0107] The vehicle 1000 of this embodiment includes a variable valve mechanism 100, with a piston 12 and a secondary rocker arm 20 connected by a transmission connection. This prevents gaps between the secondary rocker arm 20 and the piston 12, thereby reducing the probability of collision between the main rocker arm 10 and the secondary rocker arm 20. When the coupling arm 131 is in the connected or disconnected state, the relative positions of the coupling arm 131, the piston 12, and the secondary rocker arm 20 are determined, further reducing the probability of collision between the main rocker arm 10 and the secondary rocker arm 20. Therefore, the probability of damage to the vehicle 1000 of this embodiment can be reduced. Moreover, the rigid connection between the piston 12 and the coupling arm 131 avoids the problem of fluid volume compression, thereby reducing lift loss and improving the accuracy of valve lift expression of the secondary cam 300, thus improving the performance of the vehicle 1000 of this embodiment.

[0108] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0109] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0110] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "over," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure rotates, then an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0111] In the description of the application, the technical terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential", "height direction", "first direction", "second direction", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0112] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0113] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A variable valve mechanism, characterized in that, It includes a main rocker arm and a secondary rocker arm, wherein the main rocker arm includes: Rocker arm body; A plunger is connected to the auxiliary rocker arm via a transmission, and the plunger is movably disposed on the rocker arm body; A coupling device includes a coupling arm rotatably connected to the rocker arm body. The coupling arm has a connected state and a disconnected state relative to the plunger. When the coupling arm is in the connected state, it is connected to the plunger and forms a transmission connection between the rocker arm body and the plunger. When the coupling arm is in the disconnected state, it is separated from the plunger.

2. The variable valve mechanism according to claim 1, characterized in that, The plunger is provided with a connection hole. When the coupling arm is in the connected state, it is engaged in the connection hole. When the coupling arm is in the separated state, it is located outside the connection hole. The coupling device also includes an ejection assembly, which is movably disposed in the plunger. The ejection assembly is configured to extend into the connection hole and eject the coupling arm out of the connection hole.

3. The variable valve mechanism according to claim 2, characterized in that, The plunger has a mounting cavity connected to the connection hole. The ejection assembly includes an ejector, which is movably disposed in the mounting cavity. The ejector has an ejected position and a retracted position relative to the connection hole. The ejector in the ejected position is located inside the connection hole and is configured to force the coupling arm to be located outside the connection hole. The ejector in the retracted position is located outside the connection hole.

4. The variable valve mechanism according to claim 3, characterized in that, The main rocker arm also includes a hydraulic structure connected to the mounting cavity, the hydraulic structure being configured to pressurize the mounting cavity and drive the ejector to one of the ejected position and the retracted position; The ejection assembly further includes a first elastic element disposed within the mounting cavity. The first elastic element is in a deformed state and connected to the ejection member. The first elastic element is configured to drive the ejection member to either the ejection position or the retracted position when the hydraulic structure is depressurized from the mounting cavity.

5. The variable valve mechanism according to claim 4, characterized in that, The ejector includes an ejector portion and a drive portion. The drive portion is arranged around the ejector portion. The ejector portion closes the connection space between the mounting cavity and the connection hole. A liquid injection space is defined between the outer peripheral wall of the ejector portion, the outer peripheral wall of the drive portion near the connection hole, and the inner peripheral wall of the mounting cavity near the connection hole. The hydraulic structure is configured to pressurize the liquid injection space and drive the ejector to a retracted position.

6. The variable valve mechanism according to claim 5, characterized in that, The mounting cavity has an opening at one end opposite to the connecting hole. The plunger includes a baffle plate, which is disposed in the mounting cavity and closes the opening. The ejector portion has a mounting channel. One end of the first elastic member is located inside the mounting channel and abuts against the ejector portion. The other end of the first elastic member is located outside the mounting channel and abuts against the baffle plate. The first elastic member is configured to be in a compressed state when the hydraulic structure is depressurized from the injection space and drive the ejector portion to the ejector position.

7. The variable valve mechanism according to any one of claims 2 to 6, characterized in that, The coupling arm includes a reset part, a hinge part, and a snap-fit ​​part connected in sequence. When the coupling arm is in the connected state, the snap-fit ​​part snaps into the connection hole. The hinge part is hinged to the rocker arm body. The reset part is located on the side of the hinge part away from the snap-fit ​​part. The coupling device also includes a second elastic element, which is sandwiched between the reset part and the rocker arm body. The second elastic element is configured to be in a compressed state when the ejection assembly is outside the connection hole, and to drive the snap-fit ​​part to snap into the connection hole.

8. The variable valve mechanism according to any one of claims 1 to 6, characterized in that, The auxiliary rocker arm abuts against the plunger. When the coupling arm is in the separated state, the auxiliary rocker arm is configured to drive the plunger to move in the first direction when moving in the first direction. The coupling device further includes a third elastic element, which is sandwiched between the rocker arm body and the plunger and located on the side of the plunger away from the secondary rocker arm. The third elastic element is configured such that the secondary rocker arm is in a compressed state when it moves in the second direction and can drive the plunger to press against the secondary rocker arm, wherein the first direction and the second direction are opposite.

9. The variable valve mechanism according to claim 8, characterized in that, The auxiliary rocker arm further includes a rocker arm body, an abutment, and an adjusting threaded component. The abutment is connected to the rocker arm body, and the adjusting threaded component extends in a first direction. The adjusting threaded component is threadedly connected to the abutment and passes through the abutment. The adjusting threaded component abuts against the plunger in the first direction.

10. A vehicle, characterized in that, include: The variable valve mechanism as described in any one of claims 1 to 9.

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