Cylinder head structure, engine and motorcycle

Abstract

The utility model provides a cylinder head structure, engine and motorcycle. The cylinder head structure includes cylinder head body, rocker, roller and cylinder cover. One side of cylinder head body is equipped with inner chamber. Rocker is installed in inner chamber. One end of rocker is equipped with installation groove. The outside wall of rocker is equipped with oil storage chamber. The inner side wall of oil storage chamber is equipped with the oil outlet hole who communicates with installation groove. Roller is installed in installation groove. Cylinder cover is installed in the chamber mouth of inner chamber to close inner chamber. The inner wall of cylinder cover is equipped with first oil collecting rib who is used for collecting the oil liquid in inner chamber and guides the oil liquid to oil storage chamber. First oil collecting rib in the application can collect the oil liquid such as oil in inner chamber, and the collected oil liquid is guided to oil storage chamber, and the oil liquid in oil storage chamber flows to installation groove through oil outlet hole, so that the roller in installation groove is fully supplied and lubricated, the roller can be effectively lubricated under high speed, the problem of roller wear is solved, the service life of engine is prolonged, and the reliability of engine is improved.

Description

Technical Field

[0001] This utility model relates to the field of engine technology, and in particular to a cylinder head structure, an engine, and a motorcycle. Background Technology

[0002] An overhead camshaft (OHC) engine is an internal combustion engine design where the camshaft is mounted on the cylinder head. Compared to the traditional bottom-mounted camshaft (OHV) structure, it offers more efficient valve control. An OHC engine includes a cylinder head, within which are arranged the camshaft, rollers, rocker arms, valves, and other valve train components. However, during engine operation, the rollers are prone to wear at high speeds, leading to a shortened engine lifespan. Utility Model Content

[0003] Therefore, it is necessary to address the problem that the rollers in existing overhead camshaft engines are prone to wear when rotating at high speeds, which leads to a shortened engine lifespan, by providing a cylinder head structure, engine, and motorcycle.

[0004] The technical solution is as follows:

[0005] Firstly, a cylinder head structure is provided, including:

[0006] The cylinder head body has an inner cavity on one side.

[0007] A rocker arm is installed in the inner cavity. One end of the rocker arm is provided with a mounting groove. The outer side wall of the rocker arm is provided with an oil storage chamber. The inner side wall of the oil storage chamber is provided with an oil outlet hole that communicates with the mounting groove.

[0008] Rollers are installed in the mounting slots;

[0009] A cylinder head is installed at the opening of the inner cavity to seal the inner cavity. The inner wall of the cylinder head is provided with a first oil collecting rib. The first oil collecting rib is configured to collect the oil in the inner cavity when the cylinder head is installed at the opening of the inner cavity and guide the oil to the oil storage chamber.

[0010] The technical solution will be further explained below:

[0011] In one embodiment, the first oil collecting rib is recessed toward the side away from the edge of the cylinder head to form a first oil collecting pool, and the bottom wall of the first oil collecting pool is provided with a first guide portion, which is used to guide the oil in the first oil collecting pool to the oil storage chamber.

[0012] In one embodiment, after the cylinder head is installed at the opening of the inner cavity, the projection of the bottom of the first oil collection pool is located within the projection area of ​​the oil storage chamber along the depth direction of the oil storage chamber.

[0013] In one embodiment, the rocker arm includes a mounting body with a first shaft hole, a first rib, a second rib, a third rib, and a fourth rib. The first and second ribs are radially spaced on the mounting body along the first shaft hole, and the third and fourth ribs are axially spaced on the mounting body along the first shaft hole. The first and second ribs are both located between the third and fourth ribs, so that the mounting body, the first rib, the second rib, and the fourth rib form the oil reservoir. The second rib is located on the side of the first rib closer to the roller and forms the mounting groove with one end of the third rib and one end of the fourth rib. The oil outlet is located on the second rib.

[0014] In one embodiment, the inner wall of the cylinder head is further provided with a second oil collecting rib. The second oil collecting rib is configured to collect the oil in the inner cavity when the cylinder head is installed at the cavity opening of the inner cavity, and guide the oil to the side of the first rib away from the second rib. The first rib is provided with an oil inlet hole communicating with the oil storage chamber. The oil inlet hole is used to guide the oil on the first rib to the oil storage chamber.

[0015] In one embodiment, the second oil collecting rib is recessed toward the side away from the edge of the cylinder head to form a second oil collecting pool. The bottom wall of the second oil collecting pool is provided with a second guide portion, which is used to guide the oil in the second oil collecting pool to the side of the first rib away from the second rib.

[0016] In one embodiment, after the cylinder head is installed at the opening of the inner cavity, the second oil collecting rib is located on the side of the first rib away from the second rib.

[0017] In one embodiment, the first oil collecting rib is recessed toward the side away from the edge of the cylinder head to form a first oil collecting pool, and the second oil collecting rib is located inside the first oil collecting rib.

[0018] Secondly, an engine is provided, including a cylinder body and a cylinder head structure, wherein the cylinder head structure is mounted on the cylinder body.

[0019] Thirdly, a motorcycle is provided, including the aforementioned engine.

[0020] In the cylinder head structure, engine, and motorcycle described in the above embodiments, the engine operates to provide power to the motorcycle. The first oil collecting rib collects oil and other fluids from the inner cavity of the cylinder head body and guides the collected oil to the oil reservoir. The oil in the oil reservoir then flows through the oil outlet to the mounting groove to fully lubricate the rollers in the mounting groove, ensuring that the rollers can be effectively lubricated at high speeds, solving the problem of roller wear, extending the service life of the engine, and improving the reliability of the motorcycle. Attached Figure Description

[0021] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0022] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of a cylinder head structure according to one embodiment.

[0024] Figure 2 for Figure 1 A schematic diagram of the cylinder head structure.

[0025] Figure 3 for Figure 2 Enlarged views of parts of the first and second episodes of the oil-reinforced gluten series.

[0026] Figure 4 for Figure 1 A partial sectional view of the cylinder head structure along the AA direction.

[0027] Figure 5 for Figure 1 A schematic diagram of the rocker arm and rollers in the diagram.

[0028] Explanation of reference numerals in the attached figures:

[0029] 10. Cylinder head structure; 100. Cylinder head body; 110. Inner cavity; 200. Rocker arm; 211. Mounting groove; 212. Oil reservoir; 213. Oil collection groove; 220. Mounting body; 221. First shaft hole; 230. First rib; 231. Oil inlet; 240. Second rib; 241. Oil outlet; 250. Third rib; 260. Fourth rib; 270. First valve pressure plate; 280. Second valve pressure plate; 300. Roller; 400. Cylinder head; 410. First oil collection rib; 411. First oil collection pool; 412. First guide section; 420. Second oil collection rib; 421. Second oil collection pool; 422. Second guide section; 500. Overhead camshaft structure. Detailed Implementation

[0030] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0031] In response to the problem that rollers in overhead camshaft engines are prone to wear at high speeds, leading to a shortened engine lifespan, the inventors discovered through research and testing that, due to the compact internal space and numerous parts of the cylinder head, the clearance between the rollers and rocker arms is small, and there is no dedicated oil passage for effective lubrication of the rollers. The rollers rely solely on oil splashed from other parts for lubrication, and the oil does not easily enter the rollers. When the rollers rotate at high speeds, the roller needles, pins, and outer wheel end faces are easily worn, which in turn leads to a shortened engine lifespan and reduced reliability.

[0032] Based on this, the cylinder head structure 10, engine and motorcycle of various embodiments of this application are designed to solve the above-mentioned technical problems.

[0033] like Figure 1As shown, in one embodiment, a cylinder head structure 10 is provided, including a cylinder head body 100, a rocker arm 200, a roller 300, and a cylinder head 400. The cylinder head body 100 has an inner cavity 110 on one side. The rocker arm 200 is installed in the inner cavity 110. One end of the rocker arm 200 has a mounting groove 211. The outer side wall of the rocker arm 200 has an oil reservoir 212. The inner side wall of the oil reservoir 212 has an oil outlet 241 communicating with the mounting groove 211. The roller 300 is installed in the mounting groove 211. The cylinder head 400 is installed at the opening of the inner cavity 110 to close the inner cavity 110. The inner wall of the cylinder head 400 has a first oil collecting rib 410, which is configured to collect oil in the inner cavity 110 when the cylinder head 400 is installed at the opening of the inner cavity 110 and guide the oil to the oil reservoir 212.

[0034] In the cylinder head structure 10 described above, during use, the first oil collecting rib 410 collects oil and other fluids from the inner cavity 110 of the cylinder head body 100 and guides the collected fluids to the oil reservoir 212. The fluids in the oil reservoir 212 then flow through the oil outlet 241 to the mounting groove 211 to provide sufficient lubrication to the rollers 300 in the mounting groove 211, ensuring that the rollers 300 can be effectively lubricated at high speeds, solving the problem of roller wear, extending the service life of the engine, and improving the reliability of the engine.

[0035] Among them, the roller 300 can be configured as any of the existing roller structures for overhead camshaft engines.

[0036] like Figure 1 , Figure 2 and Figure 3 As shown, further, the first oil collecting rib 410 is recessed towards the side away from the edge of the cylinder head 400 to form a first oil collecting pool 411. The bottom wall of the first oil collecting pool 411 is provided with a first guide portion 412, which is used to guide the oil in the first oil collecting pool 411 to the oil storage chamber 212. In this way, the oil in the first oil collecting pool 411 can converge to the first guide portion 412 under the guiding action of both ends of the first oil collecting rib 410, and then be guided to the oil storage chamber 212 through the first guide portion 412 to provide oil to the oil storage chamber 212, thereby improving the practicality of the cylinder head structure 10.

[0037] The number, position, and shape of the first oil gathering rib 410 can be flexibly adjusted according to actual usage needs. Specifically, in this embodiment, there is one first oil gathering rib 410. The first oil gathering rib 410 is V-shaped and located on one side of the inner wall of the cylinder head 400 (for example, on the upper side of the inner wall of the cylinder head 400).

[0038] The first guide section 412 can be configured as a guide groove, a guide surface, a guide flange, or other guide structures. Specifically, in this embodiment, the first guide section 412 is configured as a guide surface and can form an oil flow towards the oil storage chamber 212 at the bottom of the first oil collection tank 411.

[0039] like Figure 1 and Figure 4 As shown, optionally, after the cylinder head 400 is installed at the opening of the inner cavity 110, the projection of the bottom of the first oil collection sump 411 along the depth direction of the oil reservoir 212 is located within the projection area of ​​the oil reservoir 212. In this way, the first guide portion 412 is directly opposite the oil reservoir 212, so that the oil in the first oil collection sump 411 can be accurately and reliably guided into the oil reservoir 212, thereby improving the reliability of the cylinder head structure 10.

[0040] like Figure 1 and Figure 5 As shown, in one embodiment, the rocker arm 200 includes a mounting body 220 with a first shaft hole 221, a first rib 230, a second rib 240, a third rib 250, and a fourth rib 260. The first rib 230 and the second rib 240 are radially spaced on the mounting body 220 along the first shaft hole 221. The third rib 250 and the fourth rib 260 are axially spaced on the mounting body 220 along the first shaft hole 221. The first rib 230 and the second rib 240 are both located between the third rib 250 and the fourth rib 260, so that the mounting body 220, the first rib 230, the second rib 240, and the fourth rib 260 surround an oil reservoir 212. The second rib 240 is located on the side of the first rib 230 near the roller 300, and surrounds one end of the third rib 250 and one end of the fourth rib 260 to form a mounting groove 211. Oil outlet 241 is provided on the second rib 240.

[0041] Optionally, one end of the third rib 250 and one end of the fourth rib 260 are respectively provided with a second shaft hole and a third shaft hole. The roller 300 includes a pin, a needle roller bearing sleeved on the pin, and an outer wheel sleeved on the needle roller bearing. The two ends of the pin pass through the second shaft hole and the third shaft hole, respectively. In this way, the oil outlet 241 delivers oil to the roller 300, allowing the oil to flow to the surface of the pin, the surface of the needle roller bearing, and the surface of the outer wheel, so as to fully lubricate the entire roller 300, effectively solve the problem of wear of the pin, needle roller bearing, and outer wheel, and improve the reliability and service life of the cylinder head structure 10.

[0042] like Figure 1 and Figure 4As shown, in one embodiment, the inner wall of the cylinder head 400 is further provided with a second oil collecting rib 420. The second oil collecting rib 420 is configured to collect oil in the inner cavity 110 when the cylinder head 400 is installed at the cavity opening of the inner cavity 110, and guide the oil to the side of the first rib 230 away from the second rib 240. The first rib 230 is provided with an oil inlet hole 231 communicating with the oil reservoir 212, and the oil inlet hole 231 is used to guide the oil on the first rib 230 to the oil reservoir 212. In this way, the second oil collection rib 420 can collect the oil and other fluids in the inner cavity 110 of the cylinder head body 100 and guide the collected oil to the first rib 230. The oil on the first rib 230 then flows into the oil reservoir 212 through the oil inlet 231. The oil in the oil reservoir 212 then flows to the mounting groove 211 through the oil outlet 241 to fully lubricate the rollers 300 in the mounting groove 211, ensuring that the rollers 300 can be effectively lubricated at high speeds, solving the problem of roller wear, extending the service life of the engine, and improving the reliability of the engine.

[0043] The number of oil inlet holes 231 and oil outlet holes 241 can be flexibly adjusted according to actual usage needs. Specifically, in this embodiment, there is one oil inlet hole 231 and one oil outlet hole 241.

[0044] like Figure 1 , Figure 2 and Figure 3 As shown, the second oil collecting rib 420 is further recessed towards the side away from the edge of the cylinder head 400 to form a second oil collection pool 421. The bottom wall of the second oil collection pool 421 is provided with a second guide portion 422, which is used to guide the oil in the second oil collection pool 421 to the side of the first rib 230 away from the second rib 240. In this way, the oil in the second oil collection pool 421 can be gathered at the second guide portion 422 under the guiding action of the two ends of the second oil collecting rib 420, and then guided to the oil storage chamber 212 through the second guide portion 422, the first rib 230 and the oil inlet hole 231 to provide oil to the oil storage chamber 212, thereby improving the practicality of the cylinder head structure 10.

[0045] The number, position, and shape of the second set of oil-sealing ribs 420 can be flexibly adjusted according to actual usage needs. Specifically, in this embodiment, there is one second set of oil-sealing ribs 420, which is arranged in a V-shape.

[0046] The second guide section 422 can be configured as a guide groove, a guide surface, a guide flange, or other guide structures. Specifically, in this embodiment, the second guide section 422 is configured as a guide surface and can form an oil flow towards the oil storage chamber 212 at the bottom of the second oil collection tank 421.

[0047] Specifically, in this embodiment, the cylinder head structure 10 can collect oil through the first oil collecting rib 410 and the second oil collecting rib 420 and supply oil to the oil storage chamber 212. That is, the first oil collecting rib 410 can collect oil and form a first oil flow that flows directly to the oil storage chamber 212, and the second oil collecting rib 420 can collect oil and form a second oil flow that flows to the first rib 230. The second oil flow on the first rib 230 then flows into the oil storage chamber 212 through the oil inlet hole 231 and merges with the first oil flow, ensuring that there is oil in the oil storage chamber 212 that flows through the oil outlet hole 241 to the roller 300 for cooling and lubrication.

[0048] like Figure 1 and Figure 4 As shown, optionally, after the cylinder head 400 is installed at the opening of the inner cavity 110, the second oil collecting rib 420 is located on the side of the first rib 230 away from the second rib 240. In this way, the second guide portion 422 is correspondingly arranged with the first rib 230 so as to accurately and reliably guide the oil in the second oil collecting pool 421 to the first rib 230, thereby improving the reliability of the cylinder head structure 10.

[0049] like Figure 2 and Figure 4 As shown, optionally, the first oil collecting rib 410 is recessed towards the side away from the edge of the cylinder head 400 to form a first oil collecting pool 411. The second oil collecting rib 420 is located inside the first oil collecting rib 410. In this way, the outer wall of the second oil collecting rib 420 can also collect oil and guide the oil into the first oil collecting pool 411, so that more oil flows from the first oil collecting pool 411 to the oil storage chamber 212, improving the reliability of the cylinder head structure 10.

[0050] like Figure 5 As shown, in one embodiment, the rocker arm 200 further includes a first valve pressure plate 270 and a second valve pressure plate 280. The first valve pressure plate 270 and the second valve pressure plate 280 are disposed on both sides of the oil inlet hole 231 along the axial direction of the first shaft hole 221. The first valve pressure plate 270 and the second valve pressure plate 280 are both located on the side of the first rib 230 away from the second rib 240, and are both connected to the first rib 230, so that the first valve pressure plate 270, the second valve pressure plate 280 and the first rib 230 surround and form an oil collection groove 213 communicating with the oil outlet hole 241. In this way, the oil collection groove 213 can collect oil and other fluids in the inner cavity 110 of the cylinder head body 100. The oil collected in the oil collection groove 213 flows into the oil storage chamber 212 through the oil inlet hole 231. The oil in the oil storage chamber 212 then flows to the mounting groove 211 through the oil outlet hole 241 to fully lubricate the rollers 300 in the mounting groove 211, ensuring that the rollers 300 can be effectively lubricated at high speeds, solving the problem of roller wear, extending the service life of the engine, and improving the reliability of the engine.

[0051] Specifically, in this embodiment, the mounting body 220, the first rib 230, the second rib 240, the third rib 250, the fourth rib 260, the first valve pressure plate 270, and the second valve pressure plate 280 are integrally formed. For example, the rocker arm 200 can be processed by injection molding, casting, or other integral molding methods.

[0052] like Figure 1 As shown, in one embodiment, the cylinder head structure 10 further includes an overhead camshaft structure 500. The overhead camshaft structure 500 is mounted in the inner cavity 110. The overhead camshaft structure 500 is located on one side of the roller 300 and is used to push the roller 300. In this way, the overhead camshaft structure 500 can intermittently push the roller 300, thereby driving the rocker arm 200 to rotate to start the valves, improving the practicality of the engine.

[0053] In one embodiment, an engine is also provided, including a cylinder body and a cylinder head structure 10 as described in any of the above embodiments, the cylinder head structure 10 being mounted on the cylinder body.

[0054] Specifically, in this embodiment, the engine is a horizontal engine. Thus, the rocker arm 200 is arranged vertically or inclined within the inner cavity 110 of the cylinder head. The opening of the first oil collection sump 411 faces upwards to better collect oil, and the oil in the first oil collection sump 411 can reliably flow to the oil storage chamber 212 under the action of the first guide section 412 and gravity. Similarly, the opening of the second oil collection sump 421 also faces upwards to better collect oil, and the oil in the second oil collection sump 421 can reliably flow to the oil collection groove 213 under the action of the second guide section 422 and gravity. The oil in the oil collection groove 213 then reliably flows into the oil storage chamber 212 through the oil inlet hole 231. Under the action of gravity, the oil in the oil storage chamber 212 flows through the outlet hole to the roller 300 at the mounting groove 211, reliably and accurately lubricating the roller 300 and improving the reliability of the engine.

[0055] In one embodiment, a motorcycle is also provided, including the engine of any of the above embodiments.

[0056] In the motorcycle described above, when in use, the engine operates to provide power to the motorcycle. The first oil collecting rib 410 collects oil and other fluids from the inner cavity 110 of the cylinder head body 100 and guides the collected fluids to the oil reservoir 212. The fluids in the oil reservoir 212 then flow through the oil outlet 241 to the mounting groove 211 to provide sufficient lubrication to the rollers 300 in the mounting groove 211. This ensures that the rollers 300 can be effectively lubricated at high speeds, solves the problem of roller wear, extends the service life of the engine, and improves the reliability of the motorcycle.

[0057] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application.

[0058] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0059] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," 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 or an electrical 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 expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0060] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0061] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0062] It should also be understood that, in interpreting the connection or positional relationships of components, although not explicitly described, connection and positional relationships are interpreted to include a range of error, which should be within the acceptable deviation range of a specific value as determined by a person skilled in the art. For example, "approximately," "about," or "substantially" can mean within one or more standard deviations, without limitation herein.

[0063] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0064] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A cylinder head structure, characterized in that, include: The cylinder head body has an inner cavity on one side. A rocker arm is installed in the inner cavity. One end of the rocker arm is provided with a mounting groove. The outer side wall of the rocker arm is provided with an oil storage chamber. The inner side wall of the oil storage chamber is provided with an oil outlet hole that communicates with the mounting groove. Rollers are installed in the mounting slots; A cylinder head is installed at the opening of the inner cavity to seal the inner cavity. The inner wall of the cylinder head is provided with a first oil collecting rib. The first oil collecting rib is configured to collect the oil in the inner cavity when the cylinder head is installed at the opening of the inner cavity and guide the oil to the oil storage chamber.

2. The cylinder head structure according to claim 1, characterized in that, The first oil collecting rib is recessed toward the side away from the edge of the cylinder head to form a first oil collecting pool. The bottom wall of the first oil collecting pool is provided with a first guide portion, which is used to guide the oil in the first oil collecting pool to the oil storage chamber.

3. The cylinder head structure according to claim 2, characterized in that, After the cylinder head is installed at the opening of the inner cavity, the projection of the bottom of the first oil collection pool is located within the projection area of ​​the oil storage chamber along the depth direction of the oil storage chamber.

4. The cylinder head structure according to any one of claims 1 to 3, characterized in that, The rocker arm includes a mounting body with a first shaft hole, a first rib, a second rib, a third rib, and a fourth rib. The first and second ribs are radially spaced on the mounting body along the first shaft hole, and the third and fourth ribs are axially spaced on the mounting body along the first shaft hole. The first and second ribs are both located between the third and fourth ribs, so that the mounting body, the first rib, the second rib, and the fourth rib form the oil reservoir. The second rib is located on the side of the first rib closer to the roller, and together with one end of the third rib and one end of the fourth rib, forms the mounting groove. The oil outlet is located on the second rib.

5. The cylinder head structure according to claim 4, characterized in that, The inner wall of the cylinder head is also provided with a second oil collecting rib. The second oil collecting rib is configured to collect the oil in the inner cavity when the cylinder head is installed at the cavity opening of the inner cavity, and guide the oil to the side of the first rib away from the second rib. The first rib is provided with an oil inlet hole communicating with the oil storage chamber. The oil inlet hole is used to guide the oil on the first rib to the oil storage chamber.

6. The cylinder head structure according to claim 5, characterized in that, The second oil collecting rib is recessed toward the side away from the edge of the cylinder head to form a second oil collecting pool. The bottom wall of the second oil collecting pool is provided with a second guide portion, which is used to guide the oil in the second oil collecting pool to the side of the first rib away from the second rib.

7. The cylinder head structure according to claim 6, characterized in that, After the cylinder head is installed at the opening of the inner cavity, the second oil collecting rib is located on the side of the first rib away from the second rib.

8. The cylinder head structure according to claim 6, characterized in that, The first oil collecting rib is recessed toward the side away from the edge of the cylinder head to form a first oil collecting pool, and the second oil collecting rib is located inside the first oil collecting rib.

9. An engine, characterized in that, It includes a cylinder body and a cylinder head structure as described in any one of claims 1 to 8, wherein the cylinder head structure is mounted on the cylinder body.

10. A motorcycle, characterized in that, Including the engine as described in claim 9.

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