Blowout preventer structure and engine
By designing an anti-fuel-spray structure on the lawnmower engine, including the connection between the cover and the air guide chamber and return chamber, the problem of fuel vapor contaminating the air filter is solved, achieving more efficient combustion and lower maintenance costs.
Patent Information
- Application Number
- CN202520113482.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-17
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2035-01-17
AI Technical Summary
Existing lawnmower engines are prone to fuel vapor forming oil mist during cold starts or in high humidity environments, which leads to air filter contamination and clogging, shortens service life, and increases maintenance costs.
An anti-fuel injection structure was designed, including a cover, a connecting component, an air guide chamber, and a return chamber. The cover is connected to the cylinder and covers the air inlet of the cylinder. The cover and the air guide chamber are interconnected. The connection structure design, with the cover covering the air inlet of the cylinder and combined with the design of the air guide chamber and the return chamber, prevents fuel vapor from being ejected and optimizes the fuel vapor flow path.
It effectively prevents fuel vapor from being ejected, reduces air filter contamination, extends service life, improves combustion efficiency, and reduces safety hazards and maintenance costs.
Smart Images
Figure CN223608659U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to internal combustion engine technical field, especially a kind of anti-spray oil structure and engine. BACKGROUND
[0002] As a kind of widely used in forestry, garden maintenance and personal household hand-held power tool, the working performance of its core component-engine is directly related to the overall efficiency and reliability of grass trimmer. In order to ensure that engine obtains sufficient air supply, improve combustion efficiency, the air filter element is directly connected with the throttle valve in the existing grass trimmer design, to maximize air intake. However, such design exposes some obvious deficiencies under certain conditions, especially when dealing with oil mist state of gasoline vapor. In cold start or high humidity environment, gasoline in carburetor can form oil mist state vapor, and spray from carburetor in initial stage of engine operation. These oil mist will directly contact and pollute air filter element, cause filter element to be blocked, reduce its filtering effect, and then shorten the service life of air filter element, increase the maintenance cost of user. SUMMARY
[0003] The utility model aims at at least one of the technical problems existing in prior art. To this end, the utility model provides an anti-spray oil structure, which can reduce oil mist pollution and improve the service life of air cleaner.
[0004] The utility model further provides an engine with the above anti-spray oil structure.
[0005] According to the anti-spray oil structure of the first aspect embodiment of the utility model, it comprises:
[0006] Cover, cover is located in the air inlet of cylinder;
[0007] Connecting assembly, the connecting assembly includes two groups of first threaded holes and two groups of second threaded holes, the first threaded hole and the second threaded hole are arranged around the cover body;
[0008] Anti-spray oil assembly, including gas guide cavity and reflux cavity, the gas guide cavity and the reflux cavity are arranged to each other, the gas guide cavity and the reflux cavity are arranged towards the cylinder.
[0009] According to the anti-spraying oil structure, the following beneficial effects are achieved: the cover body covers the air inlet of the cylinder, the structure can effectively prevent fuel vapor from being accidentally sprayed from the air inlet during engine starting or running, and the safety of the system is significantly improved; the gas guide cavity and the reflux cavity are communicated with each other and are arranged towards the cylinder, so that the flow path of the oil-gas mixture is smoother and more stable, the design reduces turbulence and resistance in gas flow, helps to improve combustion efficiency and enhance engine performance; the connecting assembly comprises two groups of first threaded holes and two groups of second threaded holes, is arranged around the cover body, and provides a stable mounting mode; and the layout is not only convenient for installation, but also facilitates subsequent inspection and maintenance work, and improves overall operation convenience.
[0010] According to some embodiments of the utility model, the gas guide cavity is arranged at the upper end of the left side of the cover body, the reflux cavity is arranged at the middle part of the cover body, and the height of the air inlet of the gas guide cavity is higher than the overall height of the reflux cavity. The higher air inlet helps to prevent fuel from being directly sprayed from the air inlet, and enhances the safety of the system.
[0011] According to some embodiments of the utility model, the two first threaded holes and the two second threaded holes are alternately arranged around the reflux cavity, the first threaded hole is suitable for mounting an air filter support, and the second threaded hole is suitable for mounting the cover body on the base of the cylinder. The design of the alternately arranged structure makes the whole anti-spraying oil structure more intuitive and convenient during assembly. The technician can install each component in a fixed order, reduces the possibility of assembly errors, improves production efficiency, and reduces manufacturing cost.
[0012] According to some embodiments of the utility model, the cavity near the side of the cylinder of the gas guide cavity and the reflux cavity is designed in a smooth transition. The smooth inner surface reduces the impact and friction of the fluid on the inner wall of the cavity, reduces the risk of wear and corrosion that may occur during long-term operation, prolongs the service life of the anti-spraying oil structure, reduces the maintenance requirement, and reduces the use cost of the user.
[0013] According to some embodiments of the utility model, a transition part is arranged between the gas guide cavity and the reflux cavity, the transition part is smoothly connected with the gas guide cavity, and the transition part is smoothly connected with the reflux cavity. The smooth inner surface reduces the impact and friction of the fluid on the inner wall of the cavity, reduces the risk of wear that may occur during long-term operation, and effectively reduces the noise level during system operation due to the reduction of turbulence, and improves the user experience.
[0014] According to some embodiments of the utility model, the backflow cavity is provided with a flush part, and the flush part is arranged on the side of the backflow cavity away from the air cylinder. The design of the flush part ensures that the surface of the side of the backflow cavity away from the air cylinder is flat, so that the plurality of oil splash prevention structures can be neatly stacked together, storage space is saved, transportation and inventory management are facilitated, and this is very beneficial for batch production and distribution.
[0015] According to some embodiments of the utility model, the air inlet of the air guide cavity is provided with a circular arc transition treatment. The smooth circular arc transition surface reduces the impact and friction of fluid on the edge of the air inlet, reduces the risk of wear and corrosion that may occur during long-term operation, prolongs the service life of the oil splash prevention structure, reduces the maintenance requirement, and reduces the use cost of the user.
[0016] According to some embodiments of the utility model, the connecting assembly further comprises a process hole, and the process hole is arranged on one side of the second threaded hole. The existence of the process hole reduces the local material density, reduces the stress concentration caused by uneven material shrinkage during injection molding or casting, effectively prevents the second threaded hole from being deformed during cooling or solidification, and ensures the precision and quality of the threaded hole.
[0017] According to some embodiments of the utility model, the cover body is made of plastic material. It has excellent corrosion resistance and can maintain good stability in humid, dusty or chemical environments. This prolongs the service life of the cover body, reduces the maintenance requirement caused by corrosion, and reduces the use cost of the user.
[0018] The engine according to the second aspect of the embodiments of the utility model comprises the oil splash prevention structure according to the first aspect of the embodiments.
[0019] The engine according to the embodiments of the utility model has at least the following beneficial effects: by integrating the advanced oil splash prevention structure, the engine can effectively prevent the accidental spraying of fuel vapor during starting and running, reduce the safety hazards such as fire or explosion risk caused by fuel leakage, significantly improve the safety performance of the engine, and the design of the air guide cavity and the backflow cavity in the oil splash prevention structure ensures that the flow path of the oil-gas mixture is smoother and more stable, reduces turbulence and resistance, improves fuel utilization efficiency, and helps to realize more accurate fuel management and combustion control.
[0020] Additional aspects and advantages of the utility model will be given in part in the following description, part will become obvious from the following description, or be understood through the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS
[0021] The utility model will be further described below in combination with the drawings and embodiments, in which:
[0022] Fig. 1 Figure 1 is a schematic diagram of a blowout preventer structure according to an embodiment of the present application;
[0023] Fig. 2 Figure 2 is a schematic diagram of a blowout preventer structure according to an embodiment of the present application;
[0024] Fig. 3 Figure 3 is a schematic diagram of a blowout preventer structure according to an embodiment of the present application.
[0025] The reference signs: air guide cavity 100; backflow cavity 110; transition part 120; flush part 130; first threaded hole 140; second threaded hole 150; air inlet 160; process hole 170. DETAILED DESCRIPTION
[0026] The embodiments of the present application are described below in detail, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary only, and are used only for explaining the present application, and cannot be understood as a limitation of the present application.
[0027] In the description of the present application, it is understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as a limitation of the present application.
[0028] In the description of the present application, the meaning of several is one or more, and the meaning of multiple is two or more, greater than, less than, more than, etc. are understood as not including the number, above, below, etc. are understood as including the number. If the first, second, etc. are described, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of indicated technical features.
[0029] In the description of the utility model, unless otherwise explicitly limited, the words such as setting, installing, connecting should be understood broadly, and the skilled in the art can determine the specific meaning of the above words in the utility model according to the specific content of the technical scheme.In the description of the utility model, the description of reference terms '' an embodiment '', '' some embodiments '', '' illustrative embodiment '', '' example '', '' specific example '' or '' some examples '' means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model.In the description of the utility model, the illustrative representation of the above terms does not necessarily refer to the same embodiment or example.Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.In the description of the utility model, the description of reference terms '' an embodiment '', '' some embodiments '', '' illustrative embodiment '', '' example '', '' specific example '' or '' some examples '' means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model.In the description of the utility model, the illustrative representation of the above terms does not necessarily refer to the same embodiment or example.Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0030] With reference to Figs. 1-3 A blowout prevention oil structure, comprising:
[0031] The cover is arranged on the air inlet 160 of the cylinder;
[0032] The connecting assembly comprises two groups of first threaded holes 140 and two groups of second threaded holes 150, and the first threaded holes 140 and the second threaded holes 150 are arranged around the cover body;
[0033] The blowout prevention oil assembly comprises a gas guide cavity 100 and a backflow cavity 110, and the gas guide cavity 100 and the backflow cavity 110 are arranged to be communicated with each other, and the gas guide cavity 100 and the backflow cavity 110 are arranged towards the cylinder.
[0034] The air inlet 160 of the cylinder is covered by the cover body, and in combination with the design of the air guide cavity 100 and the return flow cavity 110, the structure can effectively prevent the accidental spraying of fuel vapor from the air inlet 160 during engine starting or running, significantly improving the safety of the system; The air guide cavity 100 and the return flow cavity 110 are in communication with each other and are arranged towards the cylinder, which ensures that the flow path of the oil-gas mixture is smoother and more stable. This design reduces turbulence and resistance in gas flow, which helps to improve combustion efficiency and enhance engine performance; The connecting assembly includes two groups of first threaded holes 140 and two groups of second threaded holes 150, which are arranged around the cover body, providing a stable installation method. Such a layout not only facilitates installation, but also facilitates subsequent inspection and maintenance work, improving the overall operational convenience.
[0035] The air guide cavity 100 is arranged at the upper end of the left side of the cover body, and the return flow cavity 110 is arranged at the middle of the cover body. The height of the air inlet 160 of the air guide cavity 100 is higher than the overall height of the return flow cavity 110. The higher air inlet 160 helps to prevent fuel from being sprayed directly from the air inlet 160, enhancing the safety of the system.
[0036] Two first threaded holes 140 and two second threaded holes 150 are alternately arranged around the return flow cavity 110. The first threaded holes 140 are suitable for mounting an air cleaner bracket, and the second threaded holes 150 are suitable for mounting the cover body on the base of the cylinder. This alternating ring design makes the entire anti-spray structure more intuitive and convenient during assembly. The technician can install each component in a fixed order, reducing the possibility of assembly errors, improving production efficiency, and reducing manufacturing costs.
[0037] The cavities near the cylinder side of the air guide cavity 100 and the return flow cavity 110 are designed with smooth transitions. The smooth inner surface reduces the impact and friction of the fluid on the inner wall of the cavity, reducing the risk of wear and corrosion that may occur during long-term operation, prolonging the service life of the anti-spray structure, reducing maintenance needs, and reducing user costs.
[0038] A transition portion 120 is provided between the air guide cavity 100 and the return flow cavity 110. The transition portion 120 is smoothly transitioned between the air guide cavity 100 and the return flow cavity 110. The smooth inner surface reduces the impact and friction of the fluid on the inner wall of the cavity, reducing the risk of wear that may occur during long-term operation. Since turbulence is reduced, the noise level during system operation is also effectively reduced, improving user experience.
[0039] The backflow cavity 110 is provided with a flush portion 130, which is arranged on the side of the backflow cavity 110 away from the air cylinder. The design of the flush portion 130 ensures that the surface of the backflow cavity 110 away from the air cylinder is flat, so that multiple splash-proof oil structures can be neatly stacked together, saving storage space, and also facilitating transportation and inventory management, which is particularly advantageous for mass production and distribution.
[0040] The air inlet 160 of the air guide cavity 100 is provided with a circular arc transition treatment. The smooth circular arc transition surface reduces the impact and friction of the fluid on the edge of the air inlet 160, reduces the risk of wear and corrosion that may occur during long-term operation, prolongs the service life of the splash-proof oil structure, reduces the maintenance requirements, and reduces the user's use cost.
[0041] The connecting assembly further includes a process hole 170 arranged on one side of the second threaded hole 150. The presence of the process hole 170 reduces the local material density, reduces the stress concentration caused by uneven material shrinkage during injection molding or casting, effectively prevents the second threaded hole 150 from deforming during cooling or solidification, and ensures the accuracy and quality of the threaded hole.
[0042] The cover body is made of plastic material. It has excellent corrosion resistance and can maintain good stability in humid, dusty or chemical environments. This prolongs the service life of the cover body, reduces the maintenance requirements caused by corrosion, and reduces the user's use cost. It can be understood that the cover body is made of engineering plastic material, which is made of a polyamide 6 (PA6) matrix and 30% glass fiber.
[0043] Referring to Figs. 1-3 , the embodiment provides a splash-proof oil structure for an engine, which is specifically designed as follows: a cover body: the cover body is made of plastic material and covers the air inlet 160 of the air cylinder. The selection of plastic not only reduces the weight, but also provides good corrosion resistance and mechanical strength, while having excellent heat conduction performance, which helps to dissipate heat. Connecting assembly: the connecting assembly includes two groups of first threaded holes 140 and two groups of second threaded holes 150, which are arranged around the cover body. The first threaded holes 140 are used to install the air cleaner bracket, which facilitates the subsequent installation of the air cleaner, thereby ensuring that the air cleaner can be tightly fitted and easily disassembled. The second threaded hole 150 is used to fix the cover body to the base of the air cylinder, ensuring the stability of the entire structure.
[0044] The connecting assembly also includes a process hole 170, which is provided on one side of the second threaded hole 150, reduces the shrinkage ratio through material reduction design, prevents deformation of the adjacent screw hole, and improves assembly accuracy. The anti-spray oil assembly includes a gas guiding cavity 100 and a backflow cavity 110, which are in communication with each other and are arranged towards the cylinder. The gas guiding cavity 100 is located at the upper end of the left side of the cover body, and the backflow cavity 110 is arranged in the middle of the cover body. The height of the gas inlet 160 of the gas guiding cavity 100 is higher than the overall height of the backflow cavity 110, which optimizes the oil and gas flow path and reduces the pollution of the air filter by fuel vapor.
[0045] The cavity design near the cylinder side of the gas guiding cavity 100 and the backflow cavity 110 is smooth transition, which reduces the resistance and turbulence in the gas or liquid flow, and improves the combustion efficiency. The transition part 120 is provided between the gas guiding cavity 100 and the backflow cavity 110, and the connection between the gas guiding cavity 100 and the backflow cavity 110 is designed as smooth transition, which further optimizes the fluid flow path and reduces pressure loss.
[0046] The side of the backflow cavity 110 away from the cylinder is provided with a flush part 130, so that multiple anti-spray oil structures can be neatly stacked together, facilitating storage and transportation. The gas inlet 160 of the gas guiding cavity 100 is provided with a circular arc transition treatment, which reduces the resistance and turbulence when the gas enters, improves the air intake efficiency, and protects the air filter from unnecessary disturbance.
[0047] When installing the anti-spray oil structure: use the first threaded hole 140 to install the air filter bracket on the cover body, ensure that it fits closely and is easy to disassemble. Use the second threaded hole 150 to firmly fix the cover body to the base of the cylinder, ensure the stability of the structure. Check the process hole 170 to ensure that the second threaded hole 150 does not deform during the manufacturing process, improve the assembly accuracy.
[0048] The cover body covers the gas inlet 160 of the cylinder, combined with the design of the gas guiding cavity 100 and the backflow cavity 110, effectively prevents accidental spraying of fuel vapor from the gas inlet 160, significantly improves the safety of the system. Optimize the oil and gas flow path: the smooth transition design between the gas guiding cavity 100 and the backflow cavity 110 and the circular arc transition treatment of the gas inlet 160 of the gas guiding cavity 100 ensure that the flow of oil and gas mixture is smoother and more stable, reducing turbulence and resistance, and improving combustion efficiency.
[0049] The backflow cavity 110 is located at a lower position, which is beneficial for the natural downward flow of fuel vapor, returning to a safe area or collection device through the action of gravity, avoiding the pollution of the air filter by oil mist, and prolonging its service life. The entire anti-spray oil structure adopts a compact and integrated design, enhancing the mechanical stability and shock resistance of the system, ensuring the reliable operation of the equipment under various operating conditions.
[0050] The anti-spraying oil structure provided by the embodiment is particularly suitable for small internal combustion engine devices such as lawn mowers, and can maintain a good working state in cold start or high humidity environment, and is suitable for various complex and changeable working environments, and provides reliable protection for users.
[0051] The engine according to the second aspect embodiment of the utility model comprises the anti-spraying oil structure of the first aspect embodiment. By integrating the advanced anti-spraying oil structure, the engine can effectively prevent the accidental spraying of fuel vapor during starting and running, reduce the safety hazards caused by fuel leakage, such as fire or explosion risk, and significantly improve the safety performance of the engine. The design of the gas guide cavity 100 and the backflow cavity 110 in the anti-spraying oil structure ensures that the flow path of the oil-gas mixture is smoother and more stable, reduces turbulence and resistance, improves fuel utilization efficiency, and helps to achieve more accurate fuel management and combustion control.
[0052] The utility model is not limited to the above-mentioned embodiments, and various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the purpose of the utility model.
Claims
1. A blowout preventer structure, characterized by, The utility model relates to an air filter structure of air filter for air cylinder, including: The cover body is equipped in the air inlet of cylinder; The connecting assembly includes two groups of first threaded holes and two groups of second threaded holes, and the first threaded hole and the second threaded hole are arranged around the cover body; The blowout preventer oil assembly includes a gas guide cavity and a backflow cavity, and the gas guide cavity and the backflow cavity are arranged in communication with each other, and the gas guide cavity and the backflow cavity are arranged towards the cylinder.
2. The blowout preventer of claim 1, wherein: The gas guide cavity is arranged at the upper end of the left side of the cover body, the backflow cavity is arranged in the middle part of the cover body, and the gas inlet height of the gas guide cavity is higher than the overall height of the backflow cavity.
3. The blowout preventer of claim 2, wherein, Two first threaded holes and two second threaded holes are alternately arranged around the backflow cavity, the first threaded hole is suitable for mounting an air filter support, and the second threaded hole is suitable for mounting the cover body on the machine base of the cylinder.
4. The anti-spray oil structure according to claim 1 or 2, wherein The cavity near the cylinder side of the gas guide cavity and the backflow cavity is designed as a smooth transition.
5. The blowout preventer of claim 1, wherein: A transition part is arranged between the gas guide cavity and the backflow cavity, and the transition part is smoothly transitioned between the gas guide cavity and the backflow cavity.
6. The blowout preventer of claim 1, wherein: The backflow cavity is provided with a flush part, and the flush part is arranged on the side of the backflow cavity away from the cylinder.
7. The blowout preventer of claim 1, wherein: The gas inlet of the gas guide cavity is provided with a circular arc transition treatment.
8. The blowout preventer of claim 1, wherein: The connecting assembly further includes a process hole arranged on one side of the second threaded hole.
9. The blowout preventer of claim 1, wherein, The cover body is made of plastic material.
10. An engine characterized by, The utility model relates to an air filter structure of air filter for air cylinder, including: The cover body is equipped in the air inlet of cylinder; The connecting assembly includes two groups of first threaded holes and two groups of second threaded holes, and the first threaded hole and the second threaded hole are arranged around the cover body; The blowout preventer oil assembly includes a gas guide cavity and a backflow cavity, and the gas guide cavity and the backflow cavity are arranged in communication with each other, and the gas guide cavity and the backflow cavity are arranged towards the cylinder. The gas guide cavity is arranged at the upper end of the left side of the cover body, the backflow cavity is arranged in the middle part of the cover body, and the gas inlet height of the gas guide cavity is higher than the overall height of the backflow cavity. Two first threaded holes and two second threaded holes are alternately arranged around the backflow cavity, the first threaded hole is suitable for mounting an air filter support, and the second threaded hole is suitable for mounting the cover body on the machine base of the cylinder. The cavity near the cylinder side of the gas guide cavity and the backflow cavity is designed as a smooth transition. A transition part is arranged between the gas guide cavity and the backflow cavity, and the transition part is smoothly transitioned between the gas guide cavity and the backflow cavity. The backflow cavity is provided with a flush part, and the flush part is arranged on the side of the backflow cavity away from the cylinder. The gas inlet of the gas guide cavity is provided with a circular arc transition treatment. The connecting assembly further includes a process hole arranged on one side of the second threaded hole. The cover body is made of plastic material.