Motorcycle engine

Abstract

The utility model relates to the technical field of motorcycle engines, and discloses a motorcycle engine which comprises a cylinder head, the cylinder head is provided with an inner cavity, a first point inspection port and a second point inspection port, one end of the first point inspection port and the second point inspection port respectively penetrate through the cylinder head and are communicated with the inner cavity, and the inner cavity is provided with a lubricating oil way, an intake valve, an exhaust valve and a rocker arm. An oil way plug is arranged on the peripheral surface of the cylinder head; the lubricating oil way comprises an oil inlet pipeline, a first oil outlet pipeline and a second oil outlet pipeline, the first oil outlet pipeline and the second oil outlet pipeline are communicated with the oil inlet pipeline, the first oil outlet pipeline corresponds to the position of the air inlet valve and is detachably connected with the oil way plug through a first point inspection port, and the second oil outlet pipeline corresponds to the position of the exhaust valve and the position of the rocker arm. The second oil outlet pipeline is detachably connected with the oil way plug through the second point inspection port. The motorcycle engine is simple in structure, the connectivity of the oil way can be verified in the production process, and the situation that the engine is damaged due to the fact that the lubricating oil way is blocked is avoided.

Description

Technical Field

[0001] This utility model relates to the technical field of motorcycle engines, and in particular to a motorcycle engine. Background Technology

[0002] Currently, the upper part (cylinder head cover) of a motorcycle engine houses the camshaft, valves, and rocker arm moving parts. The camshaft drives the valves to open via the rocker arm, generating a large amount of frictional heat during operation. This requires the oil circuit to provide lubricating oil to reduce friction and dissipate heat. As users' requirements for sound and durability increase, the previous single-path splash lubrication is insufficient to fully lubricate the moving parts, easily producing frictional noises.

[0003] Oil passages are often sealed with oil plugs, but it is impossible to check whether the oil passages are unobstructed during engine production. As the transport channel for lubricating oil, blockages in the lubricating oil passages can lead to engine damage. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. It provides a motorcycle engine with a simple structure that allows for verification of oil passage continuity during production, preventing engine damage caused by blocked lubrication lines.

[0005] To achieve the above objectives, this utility model provides a motorcycle engine, including a cylinder head. The cylinder head has an inner cavity, a first inspection port, and a second inspection port. One end of the first inspection port and the second inspection port respectively penetrate the cylinder head and communicate with the inner cavity. The inner cavity has a lubricating oil passage, an intake valve, an exhaust valve, and a rocker arm. An oil passage plug is provided on the outer circumferential surface of the cylinder head.

[0006] The lubrication circuit includes an oil inlet pipe and a first oil outlet pipe and a second oil outlet pipe respectively connected to the oil inlet pipe. The first oil outlet pipe is positioned corresponding to the intake valve and is detachably connected to the oil circuit plug through a first inspection port. The second oil outlet pipe is positioned corresponding to the exhaust valve and the rocker arm respectively and is detachably connected to the oil circuit plug through a second inspection port.

[0007] As a preferred embodiment, one end of the intake valve is connected to an intake spring disc, and the first oil outlet pipe is provided with a first oil outlet, which is located above the intake spring disc and is respectively oriented towards the intake valve and the intake spring disc.

[0008] As a preferred embodiment, the intake valves are provided in multiple ways, and each intake valve is provided with an intake spring disc. The first oil outlet is provided in a manner corresponding to the number and position of the intake valves.

[0009] As a preferred embodiment, the rocker arm is drivenly connected to the exhaust valve, the rocker arm is fitted with an exhaust rocker arm bearing, and the second oil outlet is provided with a second oil outlet, which is positioned toward the exhaust rocker arm bearing.

[0010] As a preferred embodiment, the second oil outlet pipeline is provided with a third oil outlet, one end of the exhaust valve is connected to an exhaust spring disc, the third oil outlet is located on one side of the exhaust spring disc, and the third oil outlet is oriented towards the exhaust spring disc and the exhaust valve.

[0011] As a preferred embodiment, the second oil outlet pipeline includes a first oil outlet branch pipe and a second oil outlet branch pipe. The oil circuit plug is connected to one end of the first oil outlet branch pipe through the second inspection port. The oil inlet pipeline is connected to the first oil outlet branch pipe. The other end of the first oil outlet branch pipe is connected to one end of the second oil outlet branch pipe. The second oil outlet branch pipe extends to the space between the exhaust rocker arm bearing and the exhaust valve. The second oil outlet and the third oil outlet are located in the second oil outlet branch pipe.

[0012] As a preferred embodiment, the end of the first oil outlet line away from the intake valve is threadedly connected to the oil passage plug, and the oil passage plug is sealed to the first inspection port.

[0013] As a preferred embodiment, the end of the first oil outlet line away from the intake valve is threadedly connected to the oil passage plug, and the oil passage plug is sealed to the second inspection port.

[0014] As a preferred embodiment, the oil inlet pipeline includes a first oil inlet pipeline and a second oil inlet pipeline. The first oil outlet pipeline is provided with a first pipeline interface, which is located at the end of the first oil outlet pipeline facing the first inspection port. The first oil inlet pipeline is connected to the first pipeline interface.

[0015] The second oil outlet line is provided with a second pipeline interface, which is located at the end of the second oil outlet line facing the second inspection port.

[0016] As a preferred embodiment, the cylinder head includes a cylinder head body and a cylinder head cover. The cylinder head body has a cylinder head opening, and the cylinder head cover is disposed on the cylinder head opening to form the inner cavity. The first inspection port is disposed on the cylinder head cover, and the second inspection port is disposed on the cylinder head body.

[0017] Compared with the prior art, the beneficial effects of this embodiment of a motorcycle engine are as follows: the lubrication oil circuit is used to hold lubricating oil for lubricating the intake valve, exhaust valve, and rocker arm. The lubricating oil lubricates the moving parts through a first oil outlet pipe and a second oil outlet pipe. The first oil outlet pipe is detachably connected to an oil passage plug via a first inspection port, and the second oil outlet pipe is detachably connected to the oil passage plug via a second inspection port. The oil passage plug is located on the outer circumference of the cylinder head and directly connects to the end of the lubrication oil circuit. After removing the oil passage plug, the continuity of the oil circuit is verified by observing whether lubricating oil flows out of the first and second inspection ports, thus preventing engine damage caused by blocked lubrication oil circuits. The first and second oil outlet pipes are detachably connected and sealed via oil passage plugs, sealing the oil circuit and preventing leakage when the engine is running. The oil passage plugs simultaneously perform detection and sealing, eliminating the need for additional sealing parts and reducing the number of components. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model.

[0019] Figure 2 This is a side view of the overall structure of an embodiment of the present utility model.

[0020] Figure 3 This is a top view of the overall structure of an embodiment of this utility model.

[0021] Figure 4 This is a schematic diagram of the internal components of the oil circuit plug and lever head in an embodiment of this utility model.

[0022] Figure 5 This is a schematic diagram of the structure of the oil passage plug, lubrication oil passage, valve and rocker arm in an embodiment of this utility model.

[0023] In the picture:

[0024] 10. Cylinder head; 11. Cylinder head body; 12. Cylinder head cover; 13. Inner cavity; 14. First inspection port; 15. Second inspection port; 16. Oil passage plug;

[0025] 20. Lubricating oil circuit; 21. Oil inlet pipe; 22. First oil inlet pipe; 23. First pipe interface; 24. Second oil inlet pipe; 25. Second pipe interface; 26. First oil outlet pipe; 27. First oil outlet; 28. Second oil outlet pipe; 29. ​​First oil outlet branch pipe; 30. Second oil outlet branch pipe; 31. Intake valve; 32. Intake spring disc; 33. Exhaust valve; 34. Third oil outlet; 35. Rocker arm; 36. Exhaust rocker arm bearing; 37. Second oil outlet; 38. Exhaust spring disc. Detailed Implementation

[0026] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0027] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" used to indicate the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] In the description of this utility model, it should be understood that the terms "connected," "linked," and "fixed," etc., used in this utility model 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 or a welded connection; 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 explicitly defined. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] like Figures 1 to 5 As shown, a preferred embodiment of the present invention provides a motorcycle engine, including a cylinder head 10. The cylinder head 10 has an inner cavity 13, a first inspection port 14, and a second inspection port 15. One end of the first inspection port 14 and the second inspection port 15 respectively penetrate the cylinder head 10 and communicate with the inner cavity 13. The inner cavity 13 is provided with a lubricating oil passage 20, an intake valve 31, an exhaust valve 33, and a rocker arm 35. An oil passage plug 16 is provided on the outer peripheral surface of the cylinder head 10.

[0030] The lubrication circuit 20 includes an oil inlet pipe 21 and a first oil outlet pipe 26 and a second oil outlet pipe 28 connected to the oil inlet pipe 21. The first oil outlet pipe 26 is positioned corresponding to the intake valve 31. The first oil outlet pipe 26 is detachably connected to the oil circuit plug 16 through a first inspection port 14. The second oil outlet pipe 28 is positioned corresponding to the exhaust valve 33 and the rocker arm 35. The second oil outlet pipe 28 is detachably connected to the oil circuit plug 16 through a second inspection port 15.

[0031] The motorcycle engine of this invention includes a lubrication oil passage 20 for holding lubricating oil that lubricates the intake valve 31, exhaust valve 33, and rocker arm 35. The lubricating oil lubricates the moving parts through a first oil outlet pipe 26 and a second oil outlet pipe 28. The first oil outlet pipe 26 is detachably connected to an oil passage plug 16 via a first inspection port 14, and the second oil outlet pipe 28 is detachably connected to the oil passage plug 16 via a second inspection port 15. The oil passage plug 16 is located on the outer circumference of the cylinder head 10 and directly connects to the end of the lubrication oil passage 20. After removing the oil passage plug 16, the continuity of the oil passage is verified by observing whether lubricating oil flows out of the first and second inspection ports 14 and 15, preventing engine damage due to blockage of the lubrication oil passage 20. The first and second oil outlet pipes 26 and 28 are detachably connected and sealed via the oil passage plug 16, sealing the oil passage and preventing leakage when the engine is running. The oil circuit plug 16 simultaneously performs detection and sealing, eliminating the need for additional sealing parts and reducing the number of parts required.

[0032] As one embodiment, the motorcycle engine of this utility model is a four-stroke engine. The structural relationship between the intake valve 31, the exhaust valve 33 and the rocker arm 35 is all prior art. The structural relationship includes, but is not limited to, the transmission relationship, the connection relationship and the positional relationship.

[0033] Furthermore, such as Figures 4 to 5 As shown, one end of the intake valve 31 is connected to the intake spring disc 32. The first oil outlet 26 is provided with a first oil outlet 27, which is located above the intake spring disc 32. The first oil outlet 27 is positioned facing both the intake valve 31 and the intake spring disc 32. The first oil outlet 27 lubricates the intake valve 31 and the intake spring disc 32 simultaneously through directional injection, eliminating the need for separate oil lines for both, reducing the number of oil outlets and the complexity of oil line branches, and simplifying the oil circuit. Positioning the first oil outlet 27 directly above the intake spring disc 32 utilizes the vertical space advantage and avoids conflict with the laterally arranged rocker arm 35 or camshaft.

[0034] As one embodiment, such as Figure 4 As shown, the area within the dashed line is a structural diagram of the internal components of the cylinder head 10, including the intake valve 31, exhaust valve 33, rocker arm 35, and lubrication oil passage 20. The area outside the dashed line is a structural diagram of the external components of the cylinder head 10, including the oil passage plug 16.

[0035] Furthermore, such as Figures 4 to 5 As shown, there are multiple intake valves 31, and each intake valve 31 is equipped with an intake spring disc 32. The first oil outlet 27 is set in accordance with the number and position of the intake valves 31. This ensures that each intake valve 31 and intake spring disc 32 receives a relatively uniform amount of lubricating oil, avoiding localized insufficient or excessive lubrication.

[0036] Furthermore, such as Figures 4 to 5As shown, the rocker arm 35 is connected to the exhaust valve 33 via a transmission, and the rocker arm 35 drives the exhaust valve 33 to open and close. The rocker arm 35 is fitted with an exhaust rocker arm bearing 36, and the second oil outlet pipe 28 has a second oil outlet 37, which is oriented towards the exhaust rocker arm bearing 36. With the second oil outlet 37 aligned with the exhaust rocker arm bearing 36, lubricating oil is sprayed through the second oil outlet 37 into the bearing interior of the rocker arm 35. The lubricating oil reaches directly between the bearing rollers and the cage, forming a continuous oil film, reducing direct metal-to-metal contact, extending bearing life, and preventing sluggish rocker arm 35 movement or abnormal noise due to insufficient lubrication, thus ensuring valve opening and closing accuracy and smooth engine operation.

[0037] Furthermore, such as Figures 4 to 5 As shown, the second oil outlet pipe 28 is provided with a third oil outlet 34. One end of the exhaust valve 33 is connected to the exhaust spring plate 38. The third oil outlet 34 is located on one side of the exhaust spring plate 38 and is oriented towards the exhaust spring plate 38 and the exhaust valve 33. Lubricating oil is sprayed through the third oil outlet 34 onto the exhaust spring plate 38 and the exhaust valve 33. The third oil outlet 34 provides directional lubrication for the exhaust spring plate 38 and the exhaust valve 33, accurately covering the exhaust valve 33 and the spring plate, significantly reducing friction and heat load. The same oil circuit covers the lubrication needs of the rocker arm 35 bearing, the exhaust valve 33, and the exhaust spring plate 38, reducing the number of oil circuit branches and parts, and lowering processing and assembly costs.

[0038] In one embodiment, the second oil outlet 37 and the third oil outlet 34 are respectively arranged at intervals along the circumference of the second oil outlet branch pipe 30 to improve the accuracy of the lubricating oil injection position.

[0039] Furthermore, such as Figure 4 As shown, the second oil outlet line 28 includes a first oil outlet branch line 29 and a second oil outlet branch line 30. An oil circuit plug 16 is connected to one end of the first oil outlet branch line 29 via a second inspection port 15. An oil inlet line 21 is connected to the first oil outlet branch line 29. The other end of the first oil outlet branch line 29 is connected to one end of the second oil outlet branch line 30. The second oil outlet branch line 30 extends between the exhaust rocker arm bearing 36 and the exhaust valve 33. A second oil outlet 37 and a third oil outlet 34 are located on the second oil outlet branch line 30. The first oil outlet branch line 29, as a branch of the main oil circuit, connects the oil inlet line 21 and the second oil outlet branch line 30, and is responsible for initial oil pressure distribution. The second oil outlet branch line 30 extends between the exhaust rocker arm bearing 36 and the exhaust valve 33, achieving precise lubrication through the second oil outlet 37 and the third oil outlet 34.

[0040] Furthermore, such as Figures 1 to 5As shown, the end of the first oil outlet pipe 26 furthest from the intake valve 31 is threadedly connected to the oil circuit plug 16, and the oil circuit plug 16 is sealed to the first inspection port 14. The oil circuit plug 16 is fixed to the end of the first oil outlet pipe 26 via a threaded connection, simultaneously forming a seal with the first inspection port 14. The installation and sealing of the oil circuit plug 16 are completed in a single step, improving assembly efficiency. The oil circuit plug 16 is located at the end of the first oil outlet pipe 26. After disassembly, the oil flow status can be directly observed. Disassembling the oil circuit plug 16 via the threaded connection verifies the continuity of the entire oil circuit, shortening testing time. The end inspection point reflects the entire oil circuit status from the oil inlet pipe 21 to the first oil outlet pipe 26. Disassembly and reassembly can be completed without special tools, reducing downtime.

[0041] Furthermore, such as Figures 1 to 5 As shown, the end of the first oil outlet pipe 26 furthest from the intake valve 31 is threadedly connected to the oil circuit plug 16, and the oil circuit plug 16 is sealed to the second inspection port 15. The oil circuit plug 16 is located at the end of the second oil outlet pipe 28. After disassembly, the oil flow status can be directly observed. The continuity of the entire oil circuit can be verified by disassembling the oil circuit plug 16 through the thread, shortening the testing time. The end inspection point can reflect the status of the entire oil circuit from the oil inlet pipe 21 to the second oil outlet pipe 28. Disassembly and reassembly can be completed without special tools, shortening downtime.

[0042] In one embodiment, the oil passage plug 16 is a bolt.

[0043] Furthermore, such as Figures 4 to 5 As shown, the oil inlet line 21 includes a first oil inlet line 22 and a second oil inlet line 24. The first oil outlet line 26 is provided with a first line interface 23, which is located at the end of the first oil outlet line 26 facing the first inspection port 14. The first oil inlet line 22 is connected to the first line interface 23. The second oil outlet line 28 is provided with a second line interface 25, which is located at the end of the second oil outlet line 28 facing the second inspection port 15. The first oil inlet line 22 is dedicated to the first oil outlet line 26 (lubrication intake side), and the second oil inlet line 24 is dedicated to the second oil outlet line 28 (lubrication exhaust side). The oil pressure can be adjusted independently. The first line interface 23 is close to the first inspection port 14, and the second line interface 25 is close to the second inspection port 15. Because the inspection position is close to the oil supply position, it is easier to observe the oil circuit continuity, improving the convenience of inspection.

[0044] Furthermore, such as Figures 1 to 4As shown, the cylinder head 10 includes a cylinder head body 11 and a cylinder head cover 12. The cylinder head body 10 has a cylinder head opening, and the cylinder head cover 12 covers the cylinder head opening and forms an inner cavity 13. A first inspection port 14 is located on the cylinder head cover 12, and a second inspection port 15 is located on the cylinder head body 10. Separate machining and material optimization significantly reduce costs and scrap rates. The cylinder head cover 12 with different inspection port layouts can be replaced according to requirements, adapting to various engine models.

[0045] In summary, this utility model embodiment provides a motorcycle engine, with a lubrication oil passage 20 used to hold lubricating oil for lubricating the intake valve 31, exhaust valve 33, and rocker arm 35. The lubricating oil lubricates the moving parts through a first oil outlet pipe 26 and a second oil outlet pipe 28. The first oil outlet pipe 26 is detachably connected to an oil passage plug 16 via a first inspection port 14, and the second oil outlet pipe 28 is detachably connected to the oil passage plug 16 via a second inspection port 15. The oil passage plug 16 is located on the outer circumferential surface of the cylinder head 10 and directly communicates with the end of the lubrication oil passage 20. After removing the oil passage plug 16, the continuity of the oil passage is verified by observing whether lubricating oil flows out of the first and second inspection ports 14 and 15, preventing engine damage due to blockage of the lubrication oil passage 20. The first and second oil outlet pipes 26 and 28 are detachably connected and sealed via the oil passage plug 16, sealing the oil passage during engine operation to prevent leakage. The oil circuit plug 16 simultaneously performs detection and sealing, eliminating the need for additional sealing parts and reducing the number of parts required.

[0046] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of this utility model, and these improvements and substitutions should also be considered within the protection scope of this utility model.

Claims

1. A motorcycle engine, characterized by: The cylinder head is provided with an inner cavity, a first point inspection port and a second point inspection port, one end of the first point inspection port and the second point inspection port respectively penetrates the cylinder head and communicates with the inner cavity, the inner cavity is provided with a lubricating oil path, an intake valve, an exhaust valve and a rocker arm, and the outer circumferential surface of the cylinder head is provided with an oil path plug; The lubricating oil path comprises an oil inlet pipeline and first and second oil outlet pipelines which respectively communicate with the oil inlet pipeline, the first oil outlet pipeline is arranged corresponding to the position of the intake valve, the first oil outlet pipeline is detachably connected with the oil path plug through the first point inspection port, and the second oil outlet pipeline is arranged corresponding to the positions of the exhaust valve and the rocker arm respectively, and the second oil outlet pipeline is detachably connected with the oil path plug through the second point inspection port.

2. The motorcycle engine of claim 1, characterized in that: One end of the intake valve is connected with an intake spring disc, the first oil outlet pipeline is provided with a first oil outlet port, the first oil outlet port is located above the corresponding intake spring disc, and the first oil outlet port is arranged towards the intake valve and the intake spring disc respectively.

3. The motorcycle engine of claim 2, characterized in that: The intake valve is provided with a plurality of intake spring discs, and the first oil outlet port is arranged corresponding to the number and position of the intake valve.

4. The motorcycle engine of claim 1, characterized in that: The rocker arm is in transmission connection with the exhaust valve, the rocker arm is provided with an exhaust rocker arm bearing, the second oil outlet pipeline is provided with a second oil outlet port, and the second oil outlet port is arranged towards the exhaust rocker arm bearing.

5. The motorcycle engine of claim 4, characterized in that: The second oil outlet pipeline is provided with a third oil outlet port, one end of the exhaust valve is connected with an exhaust spring disc, the third oil outlet port is located on one side of the exhaust spring disc, and the third oil outlet port is arranged towards the exhaust spring disc and the exhaust valve.

6. The motorcycle engine of claim 5, characterized in that: The second oil outlet pipeline comprises first and second oil outlet branch pipelines, one end of the first oil outlet branch pipeline is connected with the oil path plug through the second point inspection port, the oil inlet pipeline communicates with the first oil outlet branch pipeline, the other end of the first oil outlet branch pipeline communicates with one end of the second oil outlet branch pipeline, the second oil outlet branch pipeline extends between the exhaust rocker arm bearing and the exhaust valve, and the second oil outlet port and the third oil outlet port are arranged on the second oil outlet branch pipeline.

7. The motorcycle engine of claim 1, characterized in that: One end of the first oil outlet pipeline away from the intake valve is in screw connection with the oil path plug, and the oil path plug is in sealing connection with the first point inspection port.

8. The motorcycle engine of claim 1, characterized in that: One end of the first oil outlet pipeline away from the intake valve is in screw connection with the oil path plug, and the oil path plug is in sealing connection with the second point inspection port.

9. The motorcycle engine of claim 1, characterized in that: The oil inlet pipeline comprises first and second oil inlet pipelines, the first oil outlet pipeline is provided with a first pipeline interface, the first pipeline interface is located at one end of the first oil outlet pipeline towards the first point inspection port, and the first oil inlet pipeline is connected with the first pipeline interface. The second oil outlet pipeline is provided with a second pipeline interface, and the second pipeline interface is located at one end of the second oil outlet pipeline towards the second point inspection port.

10. The motorcycle engine of claim 1, characterized in that: The cylinder head comprises a cylinder head body and a cylinder head cover, the cylinder head body is provided with a cylinder head port, the cylinder head cover is arranged on the cylinder head port and forms the inner cavity, the first point inspection opening is arranged on the cylinder head cover, and the second point inspection opening is arranged on the cylinder head body.

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