Limiting mechanism of variable valve pushing device

Abstract

The invention relates to a limiting mechanism of a variable valve pushing device. The variable valve pushing device is installed on a power unit of a vehicle. The power unit is connected to a frame unit of the vehicle, the power unit is at least provided with a cylinder part and a transmission part, the cylinder part is connected with an air inlet pipe, and the variable valve pushing device is installed on the cylinder part; the variable valve pushing device is provided with an actuator and a pushing mechanism capable of being driven by the actuator. The actuator is mounted on the cylinder part in the vertical direction of a vehicle body, the pushing mechanism is pivoted in a mounting part of the cylinder part, and the mounting part is provided with a limiting mechanism capable of limiting the rotating angle of the pushing mechanism; therefore, the accuracy and the smoothness of the switching action between the high air inlet lift and the low air inlet lift of the vehicle serving as the air inlet valve can be improved.

Description

Technical Field

[0001] The present invention relates to a limiting mechanism for a variable valve driving device, and particularly to a limiting mechanism for a variable valve driving device that can improve the accuracy and smoothness of the switching action of the intake valve between high intake lift and low intake lift, making the switching action of the intake valve between high intake lift and low intake lift more precise and smoother. Background Art

[0002] For the variable valve lift mechanism of an internal combustion engine, the applicant applied for the patent case of "Engine Valve Pushing Member Structure" with the application number I379941; in order to make the variable valve lift mechanism of the internal combustion engine more precise and convenient, the applicant further created the variable valve lift mechanism of the internal combustion engine. Summary of the Invention

[0003]

Problems to be Solved by the Invention

[0004] The main object of the present invention is to provide a limiting mechanism for a variable valve driving device to improve the accuracy and smoothness of the switching action of the intake valve between high intake lift and low intake lift of a vehicle.

[0005]

Technical Means for Solving the Problems

[0006] To this end, some technical means of the present invention are to provide a limiting mechanism for a variable valve driving device. The variable valve driving device is installed on the power unit of a vehicle; the power unit is connected to the frame unit of the vehicle. The power unit at least has a cylinder part and a transmission part. An intake pipe is connected to the cylinder part, and the variable valve driving device is installed on the cylinder part; the variable valve driving device has an actuator and a pushing mechanism that can be driven by the actuator; the actuator is installed on the cylinder part in the up-down direction of the vehicle body, the pushing mechanism is pivotally arranged in the installation part of the cylinder part, and the installation part has a limiting mechanism that can limit the rotation angle of the pushing mechanism.

[0007] To this end, some technical means of the present invention are to provide a limiting mechanism for a variable valve driving device, and the limiting mechanism has a first limit point and a second limit point.

[0008] To this end, some technical means of the present invention are to provide a limiting mechanism for a variable valve driving device. The actuator has a body part and an actuating rod that can freely extend or retract into the body part; the frame unit of the vehicle has a cross tube; the body part of the actuator is located between the lower part of the cross tube and the upper part of the cylinder part; when viewed from the front of the vehicle body, the top edge of the actuator is located between the lower edge of the intake pipe and the upper part of the cylinder part.

[0009] For this reason, some technical means of the present invention lie in providing a limiting mechanism for a variable valve driving device. A camshaft is provided in the cylinder part. When viewed from the front of the vehicle body, the body part of the actuator is located within the width range of the cylinder part in the left-right direction of the vehicle body, and the actuating rod is located above the axis of the camshaft in the left-right direction of the vehicle body.

[0010] For this reason, some technical means of the present invention lie in providing a limiting mechanism for a variable valve driving device. The vehicle frame unit has a side frame part, and the side frame part has a rising section. A camshaft is provided in the cylinder part. When viewed from the side of the vehicle body, the end of the body part of the actuator away from the actuating rod is located in front of the rising section and above the cylinder part.

[0011] For this reason, some technical means of the present invention lie in providing a limiting mechanism for a variable valve driving device. The vehicle has a footrest part. When viewed from the side of the vehicle body, the top edge of the body part of the actuator is located above the rear upper part of the footrest part in the rearward direction of the vehicle body and above the cylinder part.

[0012] For this reason, some technical means of the present invention lie in providing a limiting mechanism for a variable valve driving device. The vehicle has a vehicle body cover unit. An air inlet hole is provided in a part of the vehicle body cover unit covering the front of the actuator. When viewed from the side of the vehicle body, the body part of the actuator is located behind the air inlet hole.

[0013] For this reason, some technical means of the present invention lie in providing a limiting mechanism for a variable valve driving device. When viewed from the top of the vehicle body, the actuator is located within the width range of the cylinder part in the left-right direction of the vehicle body and in front of the cross pipe.

[0014] For this reason, some technical means of the present invention lie in providing a limiting mechanism for a variable valve driving device. The cylinder part has a piston actuating mechanism that can make the intake valve have a high intake lift and a low intake lift. The actuating rod of the actuator has an actuating tooth part. The driving mechanism has a pivoting part, a passive tooth part provided on the outer periphery of the pivoting part, and a pushing part. The driving mechanism is pivotally provided on the cylinder part with a pivot of the pivoting part. The passive tooth part meshes with the actuating tooth part of the actuating rod. The actuator can drive the driving mechanism to rotate, and the driving mechanism can make the pushing part push the piston actuating mechanism. The pushing part is an eccentric cam.

[0015] For this reason, some technical means of the present invention lie in providing a limiting mechanism for a variable valve driving device. The driving mechanism rotates and actuates along a rotation axis extending in the front-rear direction of the vehicle body and is pivotally provided on the cylinder part. The actuator and the driving mechanism are arranged in a substantially perpendicular manner.

[0016]

Effects of the Invention

[0017] The present invention can achieve the following effects through some technical means: thereby improving the accuracy and smoothness of the switching operation between high intake lift and low intake lift of the intake valve of the vehicle.

[0018] The present invention can achieve the following effects through some technical means: thereby ensuring the accuracy of the pushing stroke of the driving mechanism.

[0019] The present invention can achieve the following effects through some technical means: thereby making good use of the space above the cylinder part and avoiding interference between the variable valve driving device and other components, and also avoiding interference between the variable valve driving device and other components.

[0020] The present invention can achieve the following effects through some technical means: thereby making the switching operation between high intake lift and low intake lift of the intake valve of the vehicle more accurate and smoother.

[0021] The present invention can achieve the following effects through some technical means: thereby making good use of the space above the cylinder part and avoiding interference between the variable valve driving device and other components, and facilitating the maintenance work of the variable valve driving device.

[0022] The present invention can achieve the following effects through some technical means: thereby facilitating the maintenance work of the variable valve driving device.

[0023] The present invention can achieve the following effects through some technical means: thereby improving the heat dissipation effect of the actuator of the variable valve driving device.

[0024] The present invention can achieve the following effects through some technical means: thereby ensuring the actuation effect of the variable valve driving device.

[0025] The present invention can achieve the following effects through some technical means: thereby avoiding interference between other components in the left - right direction of the vehicle body and the variable valve driving device. Description of the Drawings

[0026] Figure 1 It is a side view schematic diagram of the cross - riding vehicle of the present invention.

[0027] Figure 2 It is a top view of the rear half of the cross - riding vehicle of the present invention.

[0028] Figure 3 It is a front view of the rear half of the cross - riding vehicle of the present invention.

[0029] Figure 4 It is a schematic diagram of the installation of the variable valve driving device on the cylinder part of the present invention.

[0030] Figure 5 It is a three - dimensional view of the actuator of the variable valve driving device of the present invention.

[0031] Figure 6 It is a schematic diagram of the installation of the variable valve push device of the present invention on the cylinder part.

[0032] Figure 7 It is a schematic diagram of another perspective of the installation of the variable valve push device of the present invention on the cylinder part.

[0033] Figure 8 、 9 It is a sectional view action diagram of the variable valve push device and the piston actuating mechanism of the present invention.

[0034] List of reference numerals

[0035] 1: Motorcycle

[0036] 2: Frame unit

[0037] 21: Head pipe part 22: Steering mechanism

[0038] 23: Down tube part

[0039] 24: Footrest tube part

[0040] 241: Footrest cross tube

[0041] 25: Side frame part

[0042] 251: Rising section 252: Extension section

[0043] 253: Auxiliary tube 254: Extension part

[0044] 26: Cross tube

[0045] 3: Seat

[0046] 4: Power unit

[0047] 41: Cylinder part

[0048] 411: Cylinder body

[0049] 412: Cylinder head

[0050] 4121: Mounting part 4122: Limiting mechanism

[0051] 4123: First limiting point 4124: Second limiting point

[0052] 413: Camshaft seat

[0053] 414: Camshaft 414a: Axis

[0054] 415: Intake valve pusher

[0055] 4151: First pusher

[0056] 4152: Second driving part

[0057] 416: Exhaust valve driving part

[0058] 417: Combustion chamber

[0059] 42: Transmission part 421: Power output shaft

[0060] 422: Driving wheel 423: Transmission belt

[0061] 424: Driven wheel

[0062] 43: Piston actuating mechanism

[0063] 431: First piston 432: Second piston

[0064] 433: Elastic element

[0065] 44: Crankcase

[0066] 5: Variable valve driving device

[0067] 51: Actuator

[0068] 511: Body part 511a: Top edge

[0069] 512: Actuating rod

[0070] 513: Actuating tooth part

[0071] 52: Driving mechanism

[0072] 521: Pivoting part 5211: Pivot

[0073] 522: Driven tooth part 523: Driving part

[0074] 6: Vehicle body cover unit

[0075] 61: Front hood 62: Front panel

[0076] 63: Knee shield

[0077] 64: Footrest

[0078] 641: Bottom cover

[0079] 65: Side vehicle body cover

[0080] 66: Central vehicle body cover 661: Air inlet hole

[0081] 7: Air filter

[0082] 71: Intake pipe 71a: Upper edge

[0083] A: Front fork unit

[0084] B: Footrest

[0085] C: Storage box

[0086] T: Fuel tank

[0087] L: Rear swing arm L1: Rear wheel axle

[0088] FW: Front wheel RW: Rear wheel

[0089] V: Intake valve V1: Exhaust valve. Detailed implementation manners

[0090] To more easily understand the structure and achievable effects of the present invention, the following is an illustration in conjunction with the accompanying drawings.

[0091] First, please refer to Figure 1 , 4 As shown, the limiting mechanism of the variable valve pushing device of the present invention is used on an internal combustion engine-powered vehicle. Hereinafter, the vehicle of the present invention will be exemplified by a cross-riding motorcycle 1; the motorcycle (vehicle) 1 at least includes a frame unit 2, a seat 3 provided on the frame unit 2, and a power unit 4. The power unit 4 is equipped with the variable valve pushing device 5, and a body cover unit 6 covering the outer periphery of the frame unit 2.

[0092] As shown in Figure 1 , 2 , and 3, in the following description, the left and right sides of the vehicle body are defined as follows: after the driver sits on the motorcycle 1, the left side is the left hand side of the driver, and the right side is the right hand side of the driver. First, it should be stated that a head tube portion 21 is pivotally provided in the front of the frame unit 2. A steering mechanism 22 is connected above the head tube portion 21. The head tube portion 21 is connected to a downward tube portion 23 towards the rear of the vehicle body. The downward tube portion 23 is connected to a pair of left and right pedal tube portions 24 extending towards the rear of the vehicle body and in a slightly horizontal shape. A pedal cross tube 241 is connected below the pair of left and right pedal tube portions 24. The pedal tube portions 24 extend towards the rear of the vehicle to form a pair of left and right side frame portions 25. The side frame portions 25 have an ascending section 251 adjacent to the pedal tube portions 24 and an extending section 252 located at the rear section of the vehicle body. A pair of left and right auxiliary tubes 253 are provided between the ascending section 251 and the extending section 252 of the side frame portions 25, and a pair of left and right extending members 254 extend towards the rear of the vehicle body at the position where the ascending section 251 is adjacent to the pedal tube portions 24. A cross tube 26 connecting the pair of left and right ascending sections 251 is provided on the ascending section 251. A front fork unit A composed of a front shock absorber is pivotally provided below the head tube portion 21, and a front wheel FW is pivotally provided at the lower end of the front fork unit A.

[0093] As shown in Figure 1 , 2, as shown in FIGS. 3, a footrest plate 64 of the vehicle body cover unit 6 which is slightly flat is provided on a slightly horizontally arranged footrest tube portion 24 of the frame unit 2. A footrest portion B which is flat for a driver to rest his feet is formed by the footrest plate 64; when viewed from the up and down direction of the vehicle body, a fuel tank T for storing fuel for the combustion explosion of the power unit 4 is installed in the internal space defined between the pair of left and right slightly horizontally arranged footrest tube portions 24. The power unit 4 is connected to the frame unit 2 and is arranged further rearward of the vehicle body than the fuel tank T.

[0094] As Figure 1 , 2 , as shown in FIGS. 3, a seat 3 for a driver to sit on is provided above an extension section 252 of the side frame portion 25. A storage box C is provided on the extension section 252 of the side frame portion 25 and below the seat 3; the power unit 4 is locked to an auxiliary tube 253 and an extension member 254 of the side frame portion 25, and the power unit 4 is fixed to the frame unit 2 in a non-swaying manner; the power unit 4 has a cylinder portion 41 and a transmission portion 42. The cylinder portion 41 extends obliquely forward of the vehicle body and partially extends outside an ascending section 251 of the side frame portion 25, that is, the portion of the cylinder portion 41 extending forward of the vehicle body extends further forward of the vehicle body than the ascending section 251 of the side frame portion 25; the transmission portion 42 is located at the rear right side of the cylinder portion 41. A power output shaft 421 extends in the left and right direction of the vehicle body at the rear end of the transmission portion 42. A power wheel 422 is provided on one side of the power output shaft 421 (implemented on the left side of the vehicle body in the figure). The power wheel 422 is connected to a driving wheel 424 on the rear wheel RW by a transmission belt 423; a rear swing arm L is pivotally provided at the power output shaft 421 of the transmission portion 42. The front end of the rear swing arm L is pivotally provided on the transmission portion 42, and the rear end of the rear swing arm L is provided with a rear wheel shaft L1 for the rear wheel RW to be pivotally provided. Thus, the power unit 4 rotates the rear wheel RW through the power output shaft 421, the power wheel 422, the transmission belt 423, and the driving wheel 424 of the transmission portion 42.

[0095] As Figure 1 , 2As shown in FIGS. 3, the body cover unit 6 has a front hood 61 that covers the steering mechanism 22, a front panel 62 disposed below the front hood 61 and covering the front end of the vehicle body, a knee shield 63 disposed behind the front panel 62, a footrest 64 disposed below the steering mechanism 22 and between the seat 3, a bottom cover 641 is provided below the footrest 64, side body covers 65 are provided on both sides of the side frame portion 25 below the seat 3 of the motorcycle 1, and a central body cover 66 is provided below the front end of the seat 3; the central body cover 66 can be formed by the side body covers 65 covering towards the center of the vehicle body or be an independent cover member; at least one air inlet hole 661 is provided on the body cover unit 6, the air inlet hole 661 can be formed by one or both of the left and right side body covers 65, or be formed by the central body cover 66 or other maintenance covers between the left and right side body covers 65. In the implementation of the present invention, the air inlet hole 661 is provided on the central body cover 66. Further, a plurality of the air inlet holes 661 can be provided on the central body cover 66, and only one is drawn in the figure for example.

[0096] As Figure 1 , 2As shown in Figures 3, 4, 6, 7, and 8, the cylinder part 41 of the power unit 4 has a cylinder body 411 and a cylinder head 412 assembled on the cylinder body 411; the cylinder body 411 is disposed above a crankcase 44, and the transmission part 42 is connected to one side of the crankcase 44; the fresh air required for the combustion explosion of the power unit 4 is supplied by an air filter 7. After filtering and cleaning the external space, the air filter 7 inputs the air into the cylinder part 41 through an intake pipe 71 connected to the air filter 7 and the cylinder part 41 of the power unit 4, so that it can be mixed with the fuel input from the fuel tank T and then combusted in the cylinder part 41, thereby enabling the power unit 4 to generate power; a camshaft seat 413 is provided on the cylinder head 412, and a camshaft 414 that can be driven by a timing chain (not shown in the figure) is provided on the camshaft seat 413; an intake valve V is provided on the intake side of the cylinder head 412, and an exhaust valve V1 is provided on the exhaust side. The intake valve V can be pushed by an intake valve pusher 415, and the exhaust valve V1 can be pushed by an exhaust valve pusher 416; a first intake cam (high lift cam) (not shown in the figure), a second intake cam (low lift cam) (not shown in the figure), and an exhaust cam (not shown in the figure) are respectively provided on the camshaft 414; the intake valve pusher 415 has a first pusher 4151 and a second pusher 4152; the pushing roller (not shown in the figure) of the first pusher 4151 is in contact with the first intake cam of the camshaft 414, and the pushing roller (not shown in the figure) of the second pusher 4152 is in contact with the second intake cam of the camshaft 414; it should be further mentioned that in this creation, the camshaft 414 is implemented with a single camshaft, and the camshaft 414 is disposed between the intake (exhaust) valve pusher 415 (416) and the combustion chamber 417.

[0097] As shown in Figure 8 、 9 Figures, a piston actuating mechanism 43 is provided between the first pusher 4151 and the second pusher 4152. The piston actuating mechanism 43 is configured to be away from the combustion chamber 417; the piston actuating mechanism 43 has a first piston 431, a second piston 432, and an elastic element 433; the first pusher 4151 and the second pusher 4152 are interlocked or not interlocked by the actuation of the first piston 431, the second piston 432, and the elastic element 433 of the piston actuating mechanism 43 (the actuation method of this part is the same as the existing one, so it will not be elaborated here). Thereby, the cylinder part 41 of the power unit 4 can make the intake valve have different lift openings according to the driving state change by means of an engine control unit (ECU), so that the cylinder part 41 of the power unit 4 has the effect of different intake lifts.

[0098] As shown in Figure 1 、 2As shown in Figures 3, 4, 5, 6, 7, 8, and 9, a variable valve actuating device 5 for pushing the piston actuating mechanism 43 is installed on the cylinder head 412 of the cylinder part 41 of the power unit 4. The variable valve actuating device 5 is electrically connected to the vehicle driving control center (ECU) of the motorcycle 1. Thus, the vehicle driving control center (ECU) can make the variable valve actuating device 5 act or not act according to the driving conditions of the motorcycle 1. The variable valve actuating device 5 has an actuator 51 and a pushing mechanism 52 that can be driven by the actuator 51. The actuator 51 of the present invention can be implemented by an electromagnetic solenoid valve, a hydraulic or pneumatic power valve body. The following description and drawings take the solenoid valve as an example for illustration. The actuator 51 is installed on the cylinder part 41 along the up and down direction of the vehicle body (U in the figure is the upper direction of the vehicle body, D is the lower direction of the vehicle body, F is the front of the vehicle body, and R is the rear of the vehicle body). Further, the actuator 51 is installed on the cylinder head 412 of the cylinder part 41. The actuator 51 has a body part 511 and an actuating rod 512 that can freely extend or retract into the body part 511 and extends toward the camshaft 414. The actuating rod 512 has an actuating tooth part 513 formed by unevenness. The pushing mechanism 52 rotates and acts along a rotation axis extending in the front and rear direction of the vehicle body and is pivotally provided on the cylinder part 41. Further, an installation part 4121 is recessed on the cylinder head 412. The actuator 51 is installed in the installation part 4121 on the cylinder head 412 of the cylinder part 41. The installation part 4121 has a limiting mechanism 4122. The limiting mechanism 4122 has a first limiting point 4123 and a second limiting point 4124. It should be further mentioned that the actuator 51 and the pushing mechanism 52 are arranged in a substantially perpendicular manner. The pushing mechanism 52 has a pivot part 521, a passive tooth part 522 provided on the outer periphery of the pivot part 521, and a pushing part 523. The pushing mechanism 52 is pivotally provided in the installation part 4121 of the cylinder part 41 by a pivot 5211 of the pivot part 521. Thus, the pushing mechanism 52 is driven by the actuator 51 to rotate with the pivot 5211 as the rotation center. The passive tooth part 522 meshes with the actuating tooth part 513 of the actuating rod 512 of the actuator 51. Thus, when the actuator 51 acts, it can drive the pushing mechanism 52 to rotate. After the pushing mechanism 52 is driven to rotate, the pushing part 523 rotates. When the pushing part 523 rotates, it can push the piston actuating mechanism 43. Thus, the piston actuating mechanism 43 can make the intake valve actuating part 415 switch between a high intake lift and a low intake lift.After the pushing part 523 rotates to push the piston actuating mechanism 43, the first piston 431 slides towards the second piston 432 after being pushed by the pushing part 523, and pushes the second piston 432 to press the elastic element 433, causing the elastic element 433 to contract. The first limiting point 4123 will form a block on one side of the pivoting part 521, which means that the first limiting point 4123 limits the pushing stroke of the pushing mechanism 52. Thus, the first piston 431, the second piston 432, and the elastic element 433 can be pushed to a preset position. When the actuator 51 no longer drives (i.e., the solenoid valve is not magnetically attracted) the pushing part 523, the elastic element 433 reversely pushes the second piston 432 by its own elastic force. The second piston 432 then pushes the first piston 431, and the first piston 431 reversely pushes the pushing part 523 of the pushing mechanism 52. At this time, the pushing mechanism 52 is reversely pushed and rotates in the reverse direction. When the pushing mechanism 52 is reversely pushed and rotates to a preset angle, the second limiting point 4124 of the limiting mechanism 4122 can limit the rotation of the pushing mechanism 52, thereby restricting the pushing mechanism 52 to the initial position, so as to ensure the accuracy of the pushing stroke of the pushing mechanism 52. The pushing part 523 of the present invention can be implemented by an eccentric cam. More importantly, the driven gear part 522 of the pushing mechanism 52 and the driving gear part 513 of the actuating rod 512 of the actuator 51 further use different gear ratios to increase the rotational torque of the pushing mechanism 52 and can miniaturize the volume of the actuator 51. More importantly, implementing the pushing part 523 with an eccentric cam can increase the switching speed of the piston actuating mechanism 43 and improve the convenience of the piston actuating mechanism 43 for actuation.;

[0099] Such as Figure 1 , 2, as shown in Figures 3, 4, 5, 6, 7, 8, and 9, the specific configuration of the variable valve actuating device 5 of the present invention is such that, when viewed from the front of the vehicle body, the top edge 511a of the body portion 511 of the actuator 51 is designed to be located between the lower edge of the intake pipe 71 and above the cylinder portion 41; when viewed from the front of the vehicle body, the body portion 511 of the actuator 51 is located below the cross pipe 26 and above the cylinder portion 41; when viewed from the front of the vehicle body, the body portion 511 of the actuator 51 is located within the width range of the cylinder portion 41 in the left-right direction of the vehicle body, and the actuating rod 512 is located above the axis 414a of the camshaft 414 in the left-right direction of the vehicle body; when viewed from the side of the vehicle body (illustrated by the left side of the vehicle body in the figure), the end of the body portion 511 of the actuator 51 away from the actuating rod 512 is located in front of the ascending section 251 of the side frame portion 25 and above the cylinder portion 41; when viewed from the side of the vehicle body, the top edge 511a of the body portion 511 of the actuator 51 is located in the upper rear of the footrest portion B in the rearward direction of the vehicle body and above the cylinder portion 41; when viewed from the side of the vehicle body, the body portion 511 of the actuator 51 is located behind the central vehicle body cover 66 of the vehicle body cover unit 6 in the rearward direction of the vehicle body. More specifically, the body portion 511 of the actuator 51 is located behind the air intake hole 661 of the central vehicle body cover 66. Thus, when the motorcycle 1 is running, external cold air can enter through the air intake hole 661 to cool the actuator 51, thereby improving the service effect of the actuator 51; when viewed from the top of the vehicle body, the actuator 51 is located within the width range of the cylinder portion 41 in the left-right direction of the vehicle body and in front of the cross pipe 26.

[0100] The variable valve actuating device 5 of the present invention is installed on the power unit 4 of the vehicle 1; the power unit 4 is connected to the frame unit 2 of the vehicle 1. The power unit 4 at least has a cylinder portion 41 and a transmission portion 42. The cylinder portion 41 is connected with an intake pipe 71. The variable valve actuating device 5 is installed on the cylinder portion 41; the variable valve actuating device 5 has an actuator 51 and a pushing mechanism 52 that can be driven by the actuator 51; the actuator 51 is installed on the cylinder portion 41 in the up-down direction of the vehicle body, and the pushing mechanism 52 is pivotally arranged in the installation portion 4121 of the cylinder portion 41. The installation portion 4121 has a limiting mechanism 4122 that can limit the rotation angle of the pushing mechanism 52; thereby, the accuracy and smoothness of the switching action of the intake valve of the vehicle 1 for high intake lift and low intake lift can be improved.

[0101] In summary, with the above-described structure, the present invention can indeed improve the existing drawbacks and achieve the desired purpose and effect, and should already meet the practicality, novelty, and creativity described in the invention patent.

Claims

1. A limiting mechanism of a variable valve driving device, characterized in that: The variable valve push device is installed on the power unit of the vehicle; the power unit is connected to the frame unit of the vehicle, the power unit has at least a cylinder part and a transmission part, the cylinder part is connected to an intake pipe, and the variable valve push device is installed on the cylinder part; the variable valve push device has an actuator and a push mechanism that can be driven by the actuator; the actuator is installed on the cylinder part in the up and down direction of the vehicle body, the push mechanism is pivotally arranged in the mounting part of the cylinder part, and the mounting part has a limiting mechanism that can limit the rotation angle of the push mechanism.

2. The limiting mechanism of the variable valve driving device according to claim 1, characterized in that: The limiting mechanism has a first limiting point and a second limiting point.

3. The limiting mechanism of the variable valve driving device according to claim 1, characterized in that: The actuator comprises a main body and an actuating rod which can be freely extended or retracted into the main body; the frame unit of the vehicle comprises a cross tube; the main body of the actuator is located between the bottom of the cross tube and the top of the cylinder; when viewed from the front of the vehicle body, the top edge of the actuator is located between the bottom of the upper edge of the intake pipe and the top of the cylinder.

4. The limiting mechanism of the variable valve driving device according to claim 3, characterized in that: The cylinder part has a camshaft inside; when viewed from the front of the vehicle body, the main body of the actuator is located within the width range of the cylinder part along the left and right directions of the vehicle body, and the actuating rod is located above the axis of the camshaft along the left and right directions of the vehicle body.

5. The limiting mechanism of the variable valve driving device according to claim 3, characterized in that: The frame unit has a side frame portion, and the side frame portion has a rising section; the cylinder portion has a camshaft inside; when viewed from the side of the vehicle body, the end of the main body of the actuator away from the actuating rod is located in front of the rising section and above the cylinder portion.

6. The position limiting mechanism of the variable valve driving device according to claim 3, characterized in that: The vehicle has a footrest; when viewed from the side of the vehicle body, the top edge of the main body of the actuator is located above the footrest in the rear direction of the vehicle body and above the cylinder portion.

7. The limiting mechanism of the variable valve driving device according to claim 3, characterized in that: The vehicle has a vehicle body cover unit, and a portion of the vehicle body cover unit covering the front of the actuator is provided with an air inlet hole; when viewed from the side of the vehicle body, the main body of the actuator is located behind the air inlet hole.

8. The limiting mechanism of the variable valve driving device according to claim 3, characterized in that: When viewed from above the vehicle body, the actuator is located within the width of the cylinder portion in the left-right direction of the vehicle body and in front of the cross pipe.

9. The limiting mechanism of the variable valve driving device according to claim 1, characterized in that: The cylinder part has a piston actuating mechanism that can make the intake valve have high intake lift and low intake lift; the actuating rod of the actuator has an actuating tooth portion; the pushing mechanism has a pivot portion, a passive tooth portion arranged on the outer periphery of the pivot portion, and a pushing portion; the pushing mechanism is pivoted on the cylinder part with a pivot of the pivot portion; the passive tooth portion is meshed with the actuating tooth portion of the actuating rod; the actuator can drive the pushing mechanism to rotate, and the pushing mechanism can make the pushing portion push the piston actuating mechanism; the pushing portion is an eccentric cam.

10. The position limiting mechanism of the variable valve driving device according to claim 1 or 9, characterized in that: The pushing mechanism is pivotally mounted on the cylinder portion and is rotated along a rotation axis extending in the front-rear direction of the vehicle body; the actuator is arranged in a substantially perpendicular manner to the pushing mechanism.

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