Oil transportation channel of four-stroke engine

Abstract

The utility model discloses an oil transportation channel of a four-stroke engine. The oil transportation channel comprises an oil chamber; the upper and lower box bodies comprise a lower shell and an upper shell, the lower shell is connected with the oil chamber, and the upper shell is connected with the valve chamber; a first gear is arranged on the crankshaft, a second gear, and a cam, a rocker arm and a push rod which are driven by the second gear are arranged above the first gear; at least one part of the oil inlet pipeline is arranged in the lower shell in a penetrating manner, and the other part of the oil inlet pipeline extends into the oil chamber; the oil outlet pipeline is formed on the lower shell; the one-way valve is arranged at the oil outlet pipeline and used for controlling opening and closing of the oil outlet pipeline; the oil return pipeline is arranged in the upper and lower tank bodies and is used for communicating the valve chamber with the oil chamber; the oil outlet pipeline comprises a first section and a second section, the first section is communicated with the bottom of the lower shell, the second section is formed on the connecting end face of the lower shell, and an outlet of the second section is close to the meshing position of the first gear and the second gear.

Description

Technical Field

[0001] This application relates to the technical field of engines, and in particular to an oil delivery passage of a four-stroke engine. Background Art

[0002] Four-stroke engines have been widely used in various mechanical equipment and vehicles due to their good emission performance. As an indispensable part of a four-stroke engine, the lubrication system transports the engine oil in the oil chamber (oil pan) to each moving part through a circulating oil path to achieve effective lubrication, thereby reducing wear, improving working smoothness, and extending the service life of the engine.

[0003] Currently, the existing four-stroke engines still have the following problems: In the first process of the lubrication system, the oil in the oil chamber needs to be injected (sucked) into the upper and lower casings, and then the oil in the upper and lower casings is transported to the timing gear meshing position and then to the valve chamber through pressure. Due to the unreasonable layout of the internal pipelines of the casing, the engine oil input (transported) to the timing gear meshing position generally goes from bottom to top and is relatively far from the meshing position of the gear. During the process of the lower gear driving the oil to the upper gear, the oil loss is relatively large.

[0004] The above content is only used to assist in understanding the technical solution of this application, and does not represent an admission that the above content is the closest prior art to this application. Summary of the Invention

[0005] Based on this, this application provides a lubrication system and a lubrication method for a four-stroke engine to at least solve one of the defects of the prior art.

[0006] The technical solution adopted by this application to solve its technical problems is: An oil delivery passage of a four-stroke engine:

[0007] An oil chamber;

[0008] Upper and lower casings, including a lower casing and an upper casing, the lower casing is connected to the oil chamber, and the upper casing is connected to the valve chamber;

[0009] A crankshaft connecting rod mechanism, including a piston, a connecting rod, and a crankshaft. The piston moves up and down in the cylinder, and the linear motion is converted into the rotational motion of the crankshaft through the connecting rod;

[0010] A first gear is arranged on the crankshaft, a second gear is arranged above the first gear, and a cam, a rocker arm, and a push rod driven by the second gear;

[0011] An oil inlet pipeline, at least a part of which is arranged through the lower casing, and the other part extends into the oil chamber;

[0012] An oil outlet pipeline is formed on the lower casing;

[0013] A one-way valve is provided at the oil outlet pipeline for controlling the opening and closing of the oil outlet pipeline;

[0014] An oil return pipeline is provided in the upper and lower boxes for communicating the valve chamber and the oil chamber;

[0015] Wherein, the oil outlet pipeline includes a first section and a second section. The first section communicates with the bottom of the lower housing, and the second section is formed on the connecting end face of the lower housing. The outlet of the second section approaches the meshing position of the first gear and the second gear.

[0016] In some embodiments, after the upper housing and the lower housing are combined, the oil outlet pipeline is sealed.

[0017] In some embodiments, the one-way valve is arranged between the first section and the second section of the oil outlet pipeline, allowing oil to enter from the first section to the second section.

[0018] In some embodiments, the one-way valve includes a kit, a valve body and a connecting copper pipe. The kit is embedded in the lower housing, the valve body is press-fitted in the kit, and the connecting copper pipe connects the valve body and extends to the bottom position of the lower housing.

[0019] In some embodiments, the head of the valve body is spindle-shaped and elastically deformable, and has an opening. When oil enters from the first section to the second section, the opening is opened under pressure. In the normal state, the opening automatically deforms to keep closed.

[0020] In some embodiments, the opening is in the shape of a straight line and extends a certain distance along the axial direction of the valve body head.

[0021] In some embodiments, a gear placement position is provided on the lower housing, and the outlet of the second section of the oil outlet pipeline communicates with the gear placement position.

[0022] In some embodiments, an oil storage chamber communicating with the first section of the oil outlet pipeline is formed at the bottom of the lower housing, and the oil storage chamber is lower than the bottom wall of the lower housing.

[0023] In some embodiments, the first part and the second part of the oil return pipeline are respectively formed on the lower housing and the upper housing of the upper and lower boxes, and the connection part of the first part and the second part is kept sealed and through.

[0024] In some embodiments, an oil passage is provided on the crankshaft. The oil passage includes a radially communicating oil inlet hole and an axially communicating oil outlet hole. When the crankshaft rotates, the radially communicating oil inlet hole can be intermittently communicated with the oil inlet pipeline to achieve precise oil inlet.

[0025] The beneficial effects of the present application are as follows: By optimizing the oil outlet pipeline, the outlet of the oil outlet pipeline can be closer to the meshing position of the gears, effectively reducing the oil loss during transmission and further improving the lubrication efficiency. Secondly, in some other embodiments, first, by setting a specific oil circuit design on the crankshaft, precise oil inlet of the engine oil is achieved, avoiding the problems caused by the difficult control of the oil inlet volume in the traditional system. By using the intermittent penetration of the radial oil inlet holes and the oil inlet pipeline when the crankshaft rotates, it is ensured that the engine oil enters the crankcase at the appropriate time, improving the lubrication efficiency. Brief Description of the Drawings

[0026] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following described drawings are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0027] Figure 1 is the external structure schematic diagram of the present application.

[0028] Figure 2 is the external structure schematic diagram of the present application with the upper housing hidden.

[0029] Figure 3 is the internal structure cross-sectional view of the present application.

[0030] Figure 4 is the schematic diagram of the lower housing structure of the present application.

[0031] Figure 5 is the cross-sectional view of the lower housing of the present application.

[0032] Figure 6 is one of the schematic diagrams of the check valve structure of the present application.

[0033] Figure 7 is the second schematic diagram of the check valve structure of the present application.

[0034] Explanation of the reference numerals in the drawings: 1. Oil chamber, 2. Upper and lower boxes, 21. Lower housing, 211. Connection end face, 212. Gear placement position, 213. Oil storage chamber,

[0035] 22. Upper housing,

[0036] 31. Piston, 32. Connecting rod, 33. Crankshaft, 331. Radial oil inlet hole, 332. Axial oil outlet hole, 34. First gear, 35. Second gear, 36. Cam, 37. Rocker arm, 38. Push rod,

[0037] 4. Oil inlet pipeline, 41. Outlet connector, 42. Connecting copper pipe, 43. Gravity ball head,

[0038] 5. Oil outlet pipeline, 51. First section, 52. Second section,

[0039] 6. Check valve, 61. Kit, 62. Valve body, 621. Opening, 63. Connecting pipe. Detailed implementation manners

[0040] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of the technical solutions appears to be contradictory or unable to be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope of the present application.

[0041] Please refer to Figure 1-7 As shown, the present application provides an oil delivery passage for a four-stroke engine, including:

[0042] Oil chamber: used for storing lubricating oil.

[0043] Upper and lower boxes: including a lower housing and an upper housing, the lower housing is connected to the oil chamber, and the upper housing is connected to the valve chamber.

[0044] Crankshaft connecting rod mechanism: including a piston, a connecting rod and a crankshaft, the piston moves up and down in the cylinder, and the linear motion is converted into the rotational motion of the crankshaft through the connecting rod.

[0045] First gear and second gear: a first gear is arranged on the crankshaft, a second gear is arranged above the first gear, and a cam, a rocker arm and a push rod driven by the second gear.

[0046] Oil inlet pipeline: at least a part of it is arranged through the lower housing, and the other part extends into the oil chamber.

[0047] Oil outlet pipeline: formed on the lower housing.

[0048] Check valve: arranged at the oil outlet pipeline for controlling the opening and closing of the oil outlet pipeline.

[0049] Oil return pipeline: arranged in the upper and lower boxes for connecting the valve chamber and the oil chamber.

[0050] Wherein, the oil outlet pipeline includes a first section and a second section. The first section communicates with the bottom of the lower housing, and the second section is formed on the connecting end face of the lower housing. The outlet of the second section approaches the meshing position of the first gear and the second gear.

[0051] Details of some other embodiments:

[0052] Preferably, an oil passage is provided on the crankshaft. The oil passage includes a radially communicating oil inlet hole and an axially communicating oil outlet hole. When the crankshaft rotates, the radially communicating oil inlet hole can intermittently communicate with the oil inlet pipeline, and precise oil inlet is achieved by controlling the relative angle of the oil inlet hole.

[0053] In some embodiments, after the upper housing and the lower housing are combined, the oil outlet pipeline is sealed. Ensuring that the oil outlet pipeline remains sealed after the upper housing and the lower housing are combined can prevent lubricating oil leakage and improve the reliability of the system.

[0054] In some embodiments, the one-way valve is arranged between the first section and the second section of the oil outlet pipeline, allowing oil to flow from the first section into the second section. The setting of the one-way valve ensures that the lubricating oil can only flow in one direction, preventing the reverse flow of the lubricating oil, and improving the safety and stability of the lubrication system. It should be noted here that the function of the one-way valve here is to close the oil outlet channel when the crankshaft chamber sucks oil, ensuring sufficient suction negative pressure to suck in enough engine oil.

[0055] In some embodiments, the one-way valve includes a kit, a valve body, and a connecting copper pipe. The kit is embedded in the lower housing, the valve body is press-fitted into the kit, and the connecting copper pipe connects the valve body and extends to the bottom position of the lower housing. Through the combined design of the kit, the valve body, and the connecting copper pipe, it is ensured that the one-way valve can work reliably and is convenient for installation and maintenance.

[0056] In some embodiments, the head of the valve body is spindle-shaped and elastically deformable, and has an opening. When oil flows from the first section into the second section, the opening is opened under pressure. In the normal state, the opening automatically deforms to remain closed. The spindle-shaped design of the valve body automatically opens under pressure and automatically closes in the absence of pressure, ensuring the one-way suction of the lubricating oil.

[0057] In some embodiments, the opening is in a shape of a straight line and extends a certain distance along the axial direction of the head of the valve body. The design of the straight-line opening ensures that the opening can be evenly opened under pressure, improving the working efficiency of the one-way valve.

[0058] In some embodiments, a gear placement position is provided on the lower housing, and the outlet of the second section of the oil outlet pipeline communicates with the gear placement position. The design of the gear placement position ensures that the lubricating oil can be directly sprayed onto the gear meshing position, improving the lubrication effect of the gear.

[0059] In some embodiments, an oil storage chamber communicating with the first section of the oil outlet pipeline is formed at the bottom of the lower housing, and the oil storage chamber is lower than the bottom wall of the lower housing. The design of the oil storage chamber ensures that there is sufficient storage space for the lubricating oil at the bottom of the lower housing and facilitates the collection and recirculation of the lubricating oil.

[0060] In some embodiments, the first part and the second part of the oil return pipeline are respectively formed on the lower housing and the upper housing of the upper and lower boxes, and the connection between the first part and the second part is kept sealed and through. By dividing the oil return pipeline into two parts and ensuring that the connection is sealed and through, the lubricating oil can be effectively guided from the valve chamber back to the oil chamber, ensuring the sealing of the system and preventing the leakage of the lubricating oil.

[0061] So far, various embodiments of the present application have been described in detail. In order to avoid obscuring the concept of the present application, some details well known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0062] Finally, it should be noted that the above are only the preferred embodiments of the present application. The foregoing embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present application.

Claims

1. An oil delivery passage of a four-stroke engine, characterized in that, Comprising: Oil chamber; Upper and lower boxes, including a lower housing and an upper housing, the lower housing is connected to the oil chamber, and the upper housing is connected to the valve chamber; Crankshaft connecting rod mechanism, including a piston, a connecting rod and a crankshaft, the piston moves up and down in the cylinder, and the linear motion is converted into the rotational motion of the crankshaft through the connecting rod; A first gear is provided on the crankshaft, a second gear is provided above the first gear, and a cam, a rocker arm and a push rod driven by the second gear; An oil inlet pipeline, at least a part of which is arranged through the lower housing, and the other part extends into the oil chamber; An oil outlet pipeline formed on the lower housing; A check valve is arranged at the oil outlet pipeline for controlling the opening and closing of the oil outlet pipeline; An oil return pipeline is arranged in the upper and lower boxes for communicating the valve chamber and the oil chamber; Wherein, the oil outlet pipeline includes a first section and a second section, the first section communicates with the bottom of the lower housing, and the second section is formed on the connecting end face of the lower housing, and the outlet of the second section approaches the meshing position of the first gear and the second gear.

2. The fuel supply passage of a four-stroke engine according to claim 1, characterized in that, After the upper housing and the lower housing are combined, the oil outlet pipeline is sealed.

3. The fuel supply passage of a four-stroke engine according to claim 1, characterized in that, The check valve is arranged between the first section and the second section of the oil outlet pipeline and allows oil to enter from the first section to the second section.

4. The fuel supply passage of a four-stroke engine according to claim 1 or 3, characterized in that, The check valve includes a kit, a valve body and a connecting copper pipe, the kit is embedded in the lower housing, the valve body is press-fitted in the kit, and the connecting copper pipe connects the valve body and extends to the bottom position of the lower housing.

5. The fuel supply passage of a four-stroke engine according to claim 4, characterized in that, The head of the valve body is spindle-shaped and has elastic deformability and has an opening; when oil enters from the first section to the second section, the opening is opened under pressure; in the normal state, the opening automatically deforms to keep closed.

6. The fuel supply passage of a four-stroke engine according to claim 5, characterized in that, The opening is in a shape of a straight line and extends a certain distance along the axial direction of the head of the valve body.

7. The fuel supply passage of a four-stroke engine according to claim 1, characterized in that A gear placement position is opened on the lower housing, and the outlet of the second section of the oil outlet pipeline communicates with the gear placement position.

8. The fuel supply passage of a four-stroke engine according to claim 1, characterized in that, A storage oil chamber communicating with the first section of the oil outlet pipeline is formed at the bottom of the lower housing, and the storage oil chamber is lower than the bottom wall of the lower housing.

9. The fuel supply passage of a four-stroke engine according to claim 1, characterized in that, The first part and the second part of the oil return pipeline are respectively formed on the lower housing and the upper housing of the upper and lower boxes, and the connection part of the first part and the second part is kept sealed and through.

10. The fuel supply passage of a four-stroke engine according to claim 1, characterized in that, An oil passage is opened on the crankshaft, and the oil passage includes a radially communicating oil inlet hole and an axially communicating oil outlet hole. When the crankshaft rotates, the radially communicating oil inlet hole can be intermittently communicated with the oil inlet pipeline to achieve precise oil inlet.

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