Oil cooling structure of motorcycle cylinder head and motorcycle engine cylinder head
By introducing an oil-cooling structure into the motorcycle cylinder head, the lubricating oil exchanges heat with the combustion chamber dome and flows back directly through the chain cavity, solving the heat dissipation problem of motorcycles at low speeds, simplifying the oil circuit structure and reducing manufacturing costs.
Patent Information
- Application Number
- CN202520167710.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-24
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2035-01-24
AI Technical Summary
In the existing technology, most motorcycle cylinder heads use an air-cooled structure, which has poor heat dissipation effect, especially when driving at low speeds or idling, as there is not enough air to dissipate heat, resulting in poor heat dissipation and affecting the user experience.
The oil-cooled structure pumps the lubricating oil from the crankcase into the oil-cooled chamber of the cylinder head, where it exchanges heat with the combustion chamber dome and then flows directly back to the crankcase through the chain chamber. This simplifies the oil circuit structure and increases the heat exchange area and flow velocity.
It achieves effective heat dissipation during low-speed driving or idling, reduces cylinder head temperature, simplifies the oil circuit structure, and reduces manufacturing costs.
Smart Images
Figure CN223608656U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to motorcycle engine accessory technology field, concretely relates to a motorcycle cylinder head's oil cooling structure and motorcycle engine cylinder head. BACKGROUND
[0002] Cylinder head as a part on the engine, install on the upper surface of cylinder, from the upper seal cylinder and constitute combustion chamber, but in the engine work heat, if can not promptly discharge heat will cause damage to the cylinder head, influence the service life of cylinder head, will produce bigger noise, seriously affect the use of user.
[0003] The prior art motorcycle is mostly adopt wind cooling structure, set up cooling air cavity in the cylinder head, and set up exhaust hole on the cylinder head and set up intake hole on the windward surface of the cylinder head and cooling air cavity intercommunication. The motorcycle drives after, can make the wind through the intake hole into the cooling air cavity and carries out heat exchange. But this cooling mode has greater relation to the speed of motorcycle, if the motorcycle drives for a long time at low speed or idling, the cylinder head can not carry out heat dissipation through enough flowing air, high temperature still can influence structure. The lower part of the crankcase in motorcycle engine stores lubricating oil, is used for lubricating the corresponding parts, and lubricating oil can also be used as a kind of medium for heat exchange, therefore, in order to overcome the deficiency of wind cooling structure, the oil cooling mode is appeared on the market currently, lubricating oil in the crankcase is pumped into the structure of cylinder head, carries out heat exchange with cylinder head, to reach the purpose of heat dissipation and cooling of cylinder head. But the oil cooling structure of cylinder head, how to set, can have heat exchange effect good, oil circuit setting simple and so on, need to be considered further. SUMMARY
[0004] In view of the above-mentioned prior art, the technical problem to be solved by the utility model is: how to provide an oil cooling structure for a motorcycle cylinder head that has good heat exchange effect and simple oil circuit.
[0005] In order to solve the above technical problem, the utility model adopts the technical scheme of:
[0006] An oil cooling structure for a motorcycle cylinder head, comprising a cylinder head body, a combustion chamber dome is arranged at the bottom of the cylinder head body, a chain cavity is arranged at one side of the combustion chamber dome in the left-right direction of the cylinder head body, an oil cooling chamber is arranged inside the cylinder head body and above the combustion chamber dome, the oil cooling chamber is in close proximity to the combustion chamber dome, an oil inlet hole is arranged on the cylinder head body and communicates with the oil cooling chamber, and an oil outlet hole is arranged in the oil cooling chamber and communicates with the chain cavity.
[0007] In the utility model, lubricating oil enters into oil cooling chamber from oil inlet hole, and the oil cooling chamber is above the combustion chamber dome, the heat generated by the combustion chamber exchanges heat with the oil flowing through the oil cooling chamber in the process of upward transmission, thereby the temperature of the cylinder head can be reduced, and the oil communicates with the chain cavity through the oil outlet hole on one side of the oil cooling chamber, so that the oil directly returns to the bottom of the crankcase through the chain cavity, without additionally arranging an oil passage structure, the process manufacturing difficulty of the cylinder head is reduced, the structure is simpler, and the manufacturing cost is reduced.
[0008] As optimization, the oil outlet hole is located on one side of the direction of the chain cavity, and an oil inlet cavity is arranged inside the cylinder head body and on the side opposite to the oil cooling chamber in the direction of the chain cavity, the oil inlet cavity has a structure of middle contraction and two end expansion, one end of the oil inlet cavity communicates with the oil cooling chamber, and the other end communicates with the oil inlet hole.
[0009] As optimization, the number of the oil inlet cavities is at least two and is arranged in the front-rear direction of the cylinder head body, and the number of the oil inlet holes is consistent with that of the oil inlet cavities and respectively communicates with the corresponding oil inlet cavities.
[0010] As optimization, the flow area of the oil outlet hole gradually decreases from one end of the oil outlet hole facing the oil cooling chamber to one end of the oil outlet hole facing the chain cavity.
[0011] As optimization, at least two convex strips are arranged on the cavity wall of the oil cooling chamber and face the combustion chamber dome, the top of the convex strip is arranged away from the cavity wall of the oil cooling chamber opposite to the combustion chamber dome, and the convex strip extends in the left-right direction of the cylinder head body.
[0012] The utility model discloses still disclose a motorcycle engine cylinder head, including as above described the oil cooling structure of motorcycle cylinder head.
[0013] Compared with the prior art, the utility model sets the oil cooling chamber close to the combustion chamber dome structure on the cylinder head, directly exchanges heat and takes away the heat transferred, utilizes the original chain cavity on the cylinder head, and makes the oil returned to the crankcase through the chain cavity, so that the structure is simpler. BRIEF DESCRIPTION OF DRAWINGS
[0014] Fig. 1 is a top view of the present application;
[0015] Fig. 2 is a bottom view of the present application;
[0016] Fig. 3 is a sectional view of the oil cooling chamber in the present application. DETAILED DESCRIPTION
[0017] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.
[0018] It should be noted that similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures, or the orientation or positional relationship commonly used when the product is in use. They are only for the convenience of describing the invention 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 the invention. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. In addition, the terms "horizontal," "vertical," etc., do not indicate that the component is required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted. In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.
[0019] like Figs. 1 to 3 As shown, the oil-cooling structure of the motorcycle cylinder head in this specific embodiment includes a cylinder head body 1, a combustion chamber dome 2 at the bottom of the cylinder head body 1, a chain cavity 3 on one side of the cylinder head body 1 in the left-right direction of the combustion chamber dome 2, an oil-cooling chamber 4 inside the cylinder head body 1 and above the combustion chamber dome 2, an oil inlet 5 communicating with the oil-cooling chamber 4, and an oil outlet 6 communicating with the chain cavity 3.
[0020] In this specific embodiment, the oil outlet 6 is located on one side of the direction of the chain cavity 3. The cylinder head body 1 is provided with an oil inlet cavity 7 on the side of the oil cooling chamber 4 opposite to the direction of the chain cavity 3. The oil inlet cavity 7 has a structure that is constricted in the middle and expanded at both ends. One end of the oil inlet cavity 7 is connected to the oil cooling chamber 4, and the other end is connected to the oil inlet 5.
[0021] In the embodiment, the number of the oil inlet cavities 7 is two and they are arranged in the front-rear direction of the cylinder head body 1, and the number of the oil inlet holes 5 is consistent with the number of the oil inlet cavities 7 and each of the oil inlet holes 5 communicates with the corresponding oil inlet cavity 7.
[0022] In the embodiment, the flow area of the oil outlet hole 6 gradually decreases from the end of the oil outlet hole 6 facing the oil cooling cavity 4 to the end of the oil outlet hole 6 facing the chain cavity 3.
[0023] In the embodiment, the cavity wall of the oil cooling cavity 4 on the side facing the combustion chamber dome 2 is protruded to form two protrusions 8 arranged in the front-rear direction of the cylinder head body 1, the top of the protrusion 8 is arranged away from the cavity wall of the oil cooling cavity 4 on the side facing away from the combustion chamber dome 2, and the protrusion 8 extends in the left-right direction of the cylinder head body 1.
[0024] A motorcycle engine cylinder head comprises the oil cooling structure of the motorcycle cylinder head as described above.
[0025] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting, and although the present application has been described by referring to the preferred embodiments of the present application, those skilled in the art should understand that various changes can be made in form and details without departing from the spirit and scope of the present application as defined in the appended claims.
Claims
1. An oil cooling structure of a motorcycle cylinder head, comprising a cylinder head body, a bottom of the cylinder head body being provided with a combustion chamber dome, and the cylinder head body being provided with a chain cavity on one side in a left-right direction of the combustion chamber dome, characterized in that: An oil cooling cavity is arranged in the cylinder head body and above the combustion chamber dome, and an oil inlet hole is arranged on the cylinder head body and communicates with the oil cooling cavity.
2. The oil cooling structure of a motorcycle cylinder head according to claim 1, characterized in that: The oil outlet hole is located on one side of the chain cavity, and an oil inlet cavity is arranged in the cylinder head body and on the side opposite to the chain cavity.
3. The oil cooling structure of a motorcycle cylinder head according to claim 2, characterized in that: The number of the oil inlet cavities is at least two and is arranged in the front-rear direction of the cylinder head body, and the number of the oil inlet holes is consistent with the number of the oil inlet cavities and respectively communicates with the corresponding oil inlet cavities.
4. The oil cooling structure of a motorcycle cylinder head according to any one of claims 1 or 2, characterized in that: The flow area of the oil outlet hole gradually decreases from the end of the oil outlet hole facing the oil cooling cavity to the end of the oil outlet hole facing the chain cavity.
5. The oil cooling structure of a motorcycle cylinder head according to claim 1, characterized in that: At least two convex strips are arranged on the cavity wall of the oil cooling cavity and face the combustion chamber dome, and the top of the convex strip is arranged away from the cavity wall of the oil cooling cavity and faces away from the combustion chamber dome.
6. A motorcycle engine cylinder head characterised in that: An oil cooling structure of a motorcycle cylinder head as claimed in any one of claims 1 to 5.