An engine block

Abstract

This invention discloses an engine housing, belonging to the field of engine technology. It includes an intermediate cavity, a first cavity and a second cavity located on either side of the intermediate cavity, and an oil storage chamber located below the intermediate cavity at the bottom of the housing. The oil storage chamber includes a first collection chamber, a second collection chamber, and a third collection chamber. The first collection chamber is directly connected to both the first and second cavities. The second collection chamber is connected to the intermediate cavity. The first and second collection chambers are connected to the third collection chamber via a first drive pump within the first cavity. The third collection chamber is connected to the transmission system via a second drive pump within the second cavity. This solution effectively avoids oil churning within the engine while ensuring lubrication of the moving mechanisms within the engine, thereby improving overall engine efficiency and reducing energy consumption.

Description

Technical Field

[0001] This invention relates to an engine structure, and more specifically, to an engine housing. Background Technology

[0002] An engine contains moving parts such as a starting mechanism, crankshaft mechanism, transmission structure, and clutch mechanism. These structures are located in different cavities within the engine, and their installation positions vary. Current engines typically lubricate these internal moving parts using an oil reservoir at the bottom of the engine casing. To ensure effective lubrication, this reservoir needs to hold a sufficient amount of oil, immersing the moving parts in it. Lubrication is achieved through the churning of the oil by the moving parts. While this churning lubricates the moving parts, it also causes losses in the output of the moving parts, reducing the overall engine efficiency.

[0003] For example, Chinese patent application CN200710161786.5 discloses an oil circuit structure that reduces assembly time and cost, ensures the sealing performance of each oil circuit on the crankcase dividing plane, and allows easy connection of each oil circuit, thereby avoiding an increase in engine size. In this oil circuit structure, an oil outflow passage and a main oil passage are provided, respectively passing through the dividing plane of the crankcase and substantially parallel to the crankshaft. A connecting groove is formed on the dividing plane of at least one separate main body (left half) of the crankcase, connecting the oil outflow passage and the main oil groove. An annular seal is integrally surrounding the periphery of the oil outflow passage, main oil groove, and connecting groove, which are opposite each other in their respective halves on the dividing plane. While this design allows for connection of all oil circuits and oil chambers inside the engine, reducing engine size, the internal moving mechanisms are partially immersed in the oil in the oil reservoir, inevitably causing oil churning and resulting in engine energy loss. Summary of the Invention

[0004] This invention overcomes the oil churning phenomenon of internal moving mechanisms in engines and provides an engine housing. This solution effectively avoids oil churning within the engine while ensuring the lubrication effect of each moving mechanism inside the engine, thereby improving the overall efficiency of the engine and reducing energy consumption.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: an engine housing, including an intermediate cavity, a first cavity and a second cavity located on both sides of the intermediate cavity, and an oil storage cavity located below the intermediate cavity at the bottom of the housing. The oil storage cavity includes a first collection cavity, a second collection cavity and a third collection cavity. The first collection cavity is directly connected to the first cavity and the second cavity, respectively. The second collection cavity is connected to the intermediate cavity. The first collection cavity and the second collection cavity are connected to the third collection cavity through a first drive pump in the first cavity. The third collection cavity is connected to the transmission system through a second drive pump in the second cavity. In this design, the intermediate cavity, the first cavity, and the second cavity are isolated from each other. The oil in the first cavity and the second cavity can enter the first collection cavity, and the oil in the intermediate cavity can enter the second collection cavity. This allows for timely drainage of the oil in all three cavities. Furthermore, the oil levels in the first collection cavity and the second collection cavity are not the same to prevent oil from being stirred up by moving mechanisms in some cavities due to the same oil level. The oil level retained in the first collection cavity and the second collection cavity can be adapted to the needs of their respective cavities. The third collection cavity is used to store excess oil in the first collection cavity and the second collection cavity and can also supply oil to the oil return system.

[0006] Preferably, the first chamber has a first oil drain port at its bottom, and the second chamber has a second oil drain port at its bottom. The first and second oil drain ports are located on opposite sides of the top of the first collecting chamber. The first oil drain port connects the first collecting chamber and the first chamber, and the second oil drain port connects the first collecting chamber and the second chamber, allowing the oil inside the first and second chambers to converge and be pumped away by a first drive pump.

[0007] Preferably, the bottom of the intermediate cavity is provided with a central oil drain hole, and on both sides of the central oil drain hole are inclined downwards and facing the second collection cavity. The central oil drain hole is used to discharge the oil in the intermediate cavity into the second collection cavity, and the guide plates can guide the oil, so that the oil can quickly and timely enter the second collection cavity.

[0008] Preferably, the first collecting chamber has a first oil outlet, and the second collecting chamber has a second oil outlet at its bottom. The first drive pump is positioned close to the second oil outlet. The first oil outlet is connected to the input end of the first drive pump via a first pipeline, and the second oil outlet is directly connected to the input end of the first drive pump. The first drive pump can simultaneously pump out the oil from the first and second collecting chambers through the first and second oil outlets, ensuring that the oil level in the first and second collecting chambers remains low.

[0009] Preferably, the system includes a first housing and a second housing. A first cavity is located on one side of the first housing, and a second cavity is located on one side of the second housing. After the first and second housings are assembled, an intermediate cavity is formed between the side of the first housing furthest from the first cavity and the side of the second housing furthest from the second cavity. The housing is composed of a detachable assembly of the first and second housings. The intermediate cavity is formed by assembling the first and second housings. The first cavity, the second cavity, and the intermediate cavity are mutually isolated, and the oil levels inside them are different.

[0010] Preferably, the transmission system includes a crankshaft mechanism. A first housing and a second housing are provided with crankshaft holes for mounting the crankshaft mechanism. An oil outlet is provided within the crankshaft hole on the second housing. The crankshaft holes on the first and second housings are used to mount the crankshaft mechanism. The oil outlet allows oil to return to the crankshaft mechanism for lubrication and then enter the entire transmission system, achieving a lubrication effect.

[0011] Preferably, the second drive pump is arranged close to the crankshaft bore, and its input end is connected to the third collection chamber via a second pipeline. A filter assembly is provided at the output end of the second drive pump. Because the second drive pump is arranged close to the crankshaft bore, it can be driven by the crankshaft to deliver oil to the filter assembly for filtration.

[0012] Preferably, the filter assembly is located outside the housing. The filter assembly includes a filter tank, inside which a fine filter and a cooler are installed, and an oil return port is located in the middle of the filter tank. The filter assembly can filter the oil in the circulation system, preventing the oil from accumulating too many impurities over long-term use.

[0013] Preferably, the oil return port is connected to the oil outlet port via a third pipeline. The oil from the oil return port is filtered and cooled before being connected to the output end on the mounting hole via the third pipeline.

[0014] Preferably, the second collecting chamber is located between the first and third collecting chambers. The volume of the second collecting chamber is smaller than that of the first collecting chamber, and the volume of the first collecting chamber is smaller than that of the third collecting chamber. The second chamber has the smallest volume, which allows the first and third collecting chambers to be closer to the bottom center of the intermediate chamber, facilitating the layout of the pipeline.

[0015] Compared with the prior art, the beneficial effects of the present invention are: (1) The present invention arranges three independent cavities in the engine and collects, stores and transfers the oil in the corresponding cavities through different oil storage cavities, so that the oil in the first cavity, the second cavity and the middle cavity are all in a low position, avoiding the phenomenon of oil stirring in the moving mechanism due to the large amount of oil in the cavity, and improving the overall performance of the engine while ensuring the lubrication effect of the internal system; (2) The oil storage cavity is reasonably arranged, which greatly optimizes the oil circuit system inside the engine, simplifies the oil circuit and reduces the engine manufacturing difficulty. Attached Figure Description

[0016] Figure 1 This is a front view of the housing of the present invention.

[0017] Figure 2 for Figure 1 A cross-sectional view along the AA direction.

[0018] Figure 3 This is a schematic diagram of the inner side of the first housing of the present invention.

[0019] Figure 4 This is a schematic diagram of the outer side of the first housing of the present invention.

[0020] Figure 5 This is a schematic diagram of the inner side of the second housing of the present invention.

[0021] Figure 6 This is a schematic diagram of the outer side of the second housing of the present invention.

[0022] Figure 7 This is a schematic diagram showing the unfolded distribution of the inner side surfaces of the first and second inner sides of the box in this invention.

[0023] Figure 8 This is a front view of the outer side of the second housing of the present invention.

[0024] Figure 9 for Figure 8 A schematic diagram of the BB direction.

[0025] In the diagram: 1. First housing, 2. Second housing, 3. First cavity, 4. Second cavity, 5. Intermediate cavity, 6.1. First collection cavity, 6.2. Second collection cavity, 6.3. Third collection cavity, 7. First oil drain port, 8. Second oil drain port, 9. Oil drain hole, 10. Guide plate, 11. First oil outlet, 12. Second oil outlet, 13. Third oil outlet, 14. First drive pump mounting part, 15. Second drive pump mounting part, 16. Second oil outlet output end, 17. First drive pump output hole, 18. Second drive pump output hole, 19. Filter assembly, 19.1. Filter tank, 19.2 Oil return port, 20. Crankshaft hole, 21. Oil outlet hole, 22. Third pipeline. Detailed Implementation

[0026] The technical solution of the present invention will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings.

[0027] Example: Figures 1 to 8 An engine housing is shown, comprising a first housing 1 and a second housing 2, which are two detachable engine casings. A first cavity 3 is provided on the outer side of the first housing 1, and a second cavity 4 is provided on the outer side of the second housing 2. When the first housing 1 and the second housing 2 are assembled, the first cavity 3 and the second cavity 4 are located opposite each other, while the inner sides of the first housing 1 and the second housing 2 are located opposite each other. The inner sides of the first housing 1 and the second housing 2 cooperate to form an intermediate cavity 5. The first cavity 3, the second cavity 4, and the intermediate cavity 5 are separated from each other, forming relatively independent chambers. The first cavity 3 and the second cavity 4 can be connected together through an oil reservoir, while the intermediate cavity 5 is completely separated from the first cavity 3 and the second cavity 4. The first cavity 3 is used to install the engine's electric starter mechanism, the second cavity 4 is used to install the engine's transmission mechanism and clutch mechanism, and the intermediate cavity 5 is used to install the engine's crankshaft and transmission mechanism.

[0028] An oil storage chamber is located at the bottom of the housing, comprising a first collection chamber 6.1, a second collection chamber 6.2, and a third collection chamber 6.3. The oil storage chamber is situated below the intermediate cavity 5. Specifically, the first and second collection chambers 6.1 and 6.2 are directly below the intermediate cavity 5, while the third collection chamber 6.3, due to its larger size, is located entirely to the lower side of the intermediate cavity 5, with only the portion closest to the second collection chamber 6.2 directly below the intermediate cavity 5. The first and second collection chambers 6.1 and 6.2 are for collecting oil, while the third collection chamber 6.3 is for storing excess oil from the first and second collection chambers 6.1 and 6.2. The first collecting chamber 6.1, the second collecting chamber 6.2, and the third collecting chamber 6.3 are also oil storage chambers formed after the first housing 1 and the second housing 2 are assembled. Therefore, there are oil storage chamber parts on both the first housing 1 and the second housing 2. The first collecting chamber 6.1, the second collecting chamber 6.2, and the third collecting chamber 6.3 are formed together by the first housing 1 and the second housing 2, which can ensure sufficient storage space for the first collecting chamber 6.1, the second collecting chamber 6.2, and the third collecting chamber 6.3, and ensure that the first collecting chamber 6.1 and the second collecting chamber 6.2 can accommodate the oil in the first cavity 3, the second cavity 4, and the intermediate cavity 5 and keep the oil level at a low level.

[0029] The first collecting chamber 6.1, the second collecting chamber 6.2, and the third collecting chamber 6.3 are arranged side by side, with the second collecting chamber 6.2 located between the first collecting chamber 6.1 and the third collecting chamber 6.3. The first collecting chamber 6.1 and the third collecting chamber 6.3 are distributed on both sides of the second collecting chamber 6.2. The first collecting chamber 6.1 and the second collecting chamber 6.2 are located directly below the intermediate cavity 5. Figure 2 (as shown in the lateral direction) and close to the first cavity 6.1 and the second cavity 6.2, the first cavity 3 and the second cavity 4 are located on the upper outer sides of the first collection cavity 6.1 and the second collection cavity 6.2.

[0030] A first oil drain port 7 is provided at the bottom of the first cavity 3 and near the first collection cavity 6.1. Specifically, the first cavity 3 and the intermediate cavity 5 are separated by the main board of the first housing 1 (the first cavity 3 and the intermediate cavity 5 are located on both sides of the main board of the first housing 1). The side wall of the first cavity 3 is perpendicular to the main board of the first housing 1, and the side wall of the intermediate cavity 5 is perpendicular to the main board of the first housing 1, thus forming the chamber of the first cavity 3 and the chamber of the intermediate cavity 5. The first oil drain port 7 is located at the junction of the bottom side wall of the first cavity 3 and the main board. The first oil drain port 7 can be located entirely on the bottom side wall of the first cavity 3, entirely on the main board of the first housing 1, or partly on the bottom side wall of the first cavity 3 and partly on the main board of the first housing 1 (that is, a right-angle port). When the first oil drain port 7 is partially or entirely located on the main plate of the first housing 1, the top sidewall of the first collecting cavity 6.1 needs to be higher than the location of the first oil drain port 7 to prevent the first oil drain port 7 from penetrating into the intermediate cavity 5 and causing the first cavity 3 to communicate with the intermediate cavity 5. In this embodiment, the first oil drain port 7 is designed as a right-angle opening, that is, the first oil drain port 7 is partially located on the sidewall at the bottom of the first cavity 3 and partially located on the main plate of the first housing 1. This can reduce the damage to the structural strength of the first housing 1 caused by the design of the first oil drain port 7 and ensure the structural strength of the first housing 1.

[0031] A second oil drain port 8 is provided at the bottom of the second cavity 4 and near the first collection cavity 6.1. Specifically, the second cavity 4 and the intermediate cavity 5 are separated by the main board of the second housing 2 (the second cavity 4 and the intermediate cavity 5 are located on both sides of the main board of the second housing 2). The side wall of the second cavity 4 is perpendicular to the main board of the second housing 2, and the side wall of the intermediate cavity 5 is perpendicular to the main board of the second housing 2, thus forming the chamber of the second cavity 4 and the chamber of the intermediate cavity 5. The second oil drain port 8 is located at the junction of the bottom side wall of the second cavity 4 and the main board. The second oil drain port 8 can be located entirely on the bottom side wall of the second cavity 4, entirely on the main board of the second housing 2, or partly on the bottom side wall of the second cavity 4 and partly on the main board of the second housing 2 (that is, a right-angle port). When the second oil drain port 8 is partially or entirely located on the main plate of the second housing 2, the top sidewall of the first collecting cavity 6.1 needs to be higher than the location of the second oil drain port 8 to prevent the second oil drain port 8 from penetrating into the intermediate cavity 5 and causing the second cavity 4 to communicate with the intermediate cavity 5. In this embodiment, the second oil drain port 8 is designed as a right-angle opening, that is, the second oil drain port 8 is partially located on the bottom sidewall of the second cavity 4 and partially located on the main plate of the second housing 2. This can reduce the damage to the structural strength of the second housing 2 caused by the design of the second oil drain port 8 and ensure the structural strength of the second housing 2.

[0032] The first oil drain port 7 and the second oil drain port 8 are located on the top sides of the first collecting chamber 6.1, respectively, and the upper wall of the first collecting chamber 6.1 is higher than the positions of the first oil drain port 7 and the second oil drain port 8. The first oil drain port 7 connects the first chamber 3 and the first collecting chamber 6.1, and the second oil drain port 8 connects the second chamber 4 and the first collecting chamber 6.1. The first collecting chamber 6.1 can collect excess engine oil from the first chamber 3 and the second chamber 4. By promptly removing the oil from the first collecting chamber 6.1, the oil level in the first chamber 3 and the second chamber 4 can be kept low, or even reduced to zero. Only when the first collecting chamber 6.1 is full will an oil level be formed in the first chamber 3 and the second chamber 4.

[0033] Furthermore, an oil drain hole 9 is provided at the bottom of the intermediate cavity 5 and above the second collection cavity 6.2. The oil drain hole 9 directly connects the intermediate cavity 5 and the second collection cavity 6.2. Specifically, the oil drain hole 9 is also an oil hole structure formed by assembling the first housing 1 and the second housing 2. The oil drain holes 9 are distributed in half in the intermediate cavity 5 of the first housing 1 and the second housing 2, and have the same structure. Here, only the structure of the oil drain hole 9 on the second housing 2 is described. Figure 5As shown, the oil drain hole 9 is located directly above the second collection chamber 6.2. Since the intermediate cavity 5 is equipped with a crankshaft mechanism and a transmission mechanism (not shown in the figure), the bottom of the intermediate cavity 5 is not a regular shape. The bottom of the intermediate cavity 5 is two intersecting arc surfaces. The second collection chamber 6.2 is arranged at the position of the two intersecting arc surfaces and is closer to the lower arc surface. The oil drain hole 9 is set on the lower arc surface. Since the oil drain hole 9 is located at a low position, the arc surfaces on both sides of the oil drain hole 9 can form a guide plate 10 structure, which guides the oil in the intermediate cavity 5, so that the oil in the intermediate cavity 5 can enter the second collection chamber 6.2 more smoothly.

[0034] Furthermore, the volume of the second collecting chamber 6.2 is smaller than the volume of the first collecting chamber 6.1, the volume of the first collecting chamber 6.1 is smaller than the volume of the third collecting chamber 6.3, and the sum of the volumes of the first collecting chamber 6.1 and the second collecting chamber 6.2 is smaller than the volume of the third collecting chamber 6.3. For example... Figure 3 or Figure 5 As shown, the third collecting chamber 6.3 is arranged around the intermediate chamber 5. The bottom of the third collecting chamber 6.3 is located directly below the intermediate chamber 5 and adjacent to the second collecting chamber 6.2. The top of the third collecting chamber 6.3 is flush with the top of the intermediate chamber 5, thus giving the third collecting chamber 6.3 a large storage space. The oil stored in the first collecting chamber 6.1 and the second collecting chamber 6.2 is promptly pumped into the third collecting chamber 6.3. The oil level in the third collecting chamber 6.3 will be significantly higher than the oil levels in the first collecting chamber 6.1 and the second collecting chamber 6.2. Furthermore, the third collecting chamber 6.3 is separated from the first collecting chamber 6.1 and the second collecting chamber 6.2, and the oil in the third collecting chamber 6.3 cannot directly flow back into the first collecting chamber 6.1 and the second collecting chamber 6.2.

[0035] A first oil outlet 11 is provided in the first collecting chamber 6.1, penetrating the main board of the first housing 1. The first oil outlet 11 is located on the first collecting chamber 6.1 and the first cavity 3, but it is not directly connected to the first collecting chamber 6.1 and the first cavity 3. A first drive pump mounting part 14 is also provided in the first cavity 3, on which a first drive pump (not shown in the figure) is mounted. The first drive pump is an oil pump. A first pipeline (not shown in the figure) is provided between the inlet of the first drive pump and the first oil outlet 11. The first pipeline is located in the first cavity 3, thus connecting the first collecting chamber 6.1 and the first drive pump together through the first oil outlet 11 and the first pipeline. Furthermore, the first pipeline can be a separate external pipe connected between the first oil outlet 11 and the first drive pump, or it can be an integrally formed pipeline structure on the first housing 1. When the first pipeline adopts an external pipe arrangement, it is a detachable pipeline structure, which is convenient for disassembly, replacement and maintenance. When the first pipeline adopts a pipeline integrally formed with the first box 1, it is a non-detachable structure, but the ribs formed by the first pipeline can improve the structural strength of the first box 1.

[0036] A second oil outlet 12 is provided in the second collection chamber 6.2. The first drive pump mounting part 14 in the first chamber 3 is located on the back of the second collection chamber 6.2 (that is, in the same or similar position on the other side of the main board of the first housing 1). The first drive pump is located close to the second collection chamber 6.2. The second oil outlet 12 can directly penetrate the main board structure of the first housing 1 and be directly connected to the input end of the first drive pump, thus reducing the design of one set of external pipelines. At this time, the output end of the first pipeline, the output end of the second oil outlet 16, and the input end of the first drive pump are located in the same position.

[0037] This design first collects the oil from the first chamber 3 and the second chamber 4 into the first collecting chamber 6.1, and then pumps the oil out of the first collecting chamber 6.1 through the first pipeline and the first driving pump. This avoids the difficulty of pumping the oil in the second chamber 4 out through the first driving pump in the first chamber 3. Furthermore, only one set of pipelines (the first pipeline) is needed to drain the oil from the first chamber 3 and the second chamber 4, thus optimizing the pipeline design. Further, since the second collecting chamber 6.2 is located between the first collecting chamber 6.1 and the third collecting chamber 6.3, and has the smallest volume, its width is also smaller. This allows the first collecting chamber 6.1 and the third collecting chamber 6.3 to be positioned as close as possible to the bottom center of the intermediate chamber 5. The distances from the first driving pump to the first collecting chamber 6.1, the second collecting chamber 6.2, and the third collecting chamber 6.3 are minimized, significantly optimizing the oil circuit design, reducing the number of external pipelines, and enabling direct connection of the oil circuit through the through-hole.

[0038] Furthermore, a first drive pump output hole 17 is provided on the first drive pump mounting part 15. The output end of the first drive pump is connected to the first drive pump output hole 17. The first drive pump output hole 17 further penetrates the main board of the first housing 1 to the inner side surface of the first housing 1, and communicates with the third collection chamber 6.3 at the bottom of the inner side surface of the first housing 1. The first drive pump output hole 17 is also close to the second collection chamber 6.2, which greatly reduces the distance from the first drive pump output to the third collection chamber 6.3 and simplifies the oil circuit design. Through the operation of the first drive pump, the oil in the first collection chamber 6.1 and the second collection chamber 6.2 can be pumped into the third collection chamber 6.3, and the flow direction of the oil is unidirectional. The oil in the third collection chamber 6.3 cannot directly flow back to the first collection chamber 6.1 and the second collection chamber 6.2.

[0039] A third oil outlet 13 is provided in the third collection chamber 6.3 and at the bottom of the second housing 2. The third oil outlet 13 is an elongated curved pipe structure. Specifically, the input end of the third oil outlet 13 is located at the bottom of the third collection chamber 6.3 and on the second housing 2, and the output end of the third oil outlet 13 is located at the bottom of the second cavity 4. Since the bottom of the second cavity 4, the bottom of the first cavity 3, and the bottom of the intermediate cavity 5 are level and basically at the same height, and the oil storage chambers (first collection chamber 6.1, second collection chamber 6.2, and third collection chamber 6.3) are located at the bottom of the intermediate cavity 5, there is a height difference between the bottom of the third collection chamber 6.3 and the bottom of the second cavity 4. Therefore, the third oil outlet 13 needs to be designed as an elongated hole, and its length direction needs to point from the third collection chamber 6.3 to the second cavity 4. Furthermore, a second drive pump mounting part 15 is also provided inside the second cavity 4. A second drive pump (not shown in the figure) is provided on the second drive pump mounting part 15. The second drive pump is also an oil pump. The input end of the second drive pump is connected to the output end of the third oil outlet 13 through a second pipeline (not shown in the figure). A second drive pump output hole 18 is provided on the second drive pump mounting part 15. The second drive pump output hole 18 is connected to the output end of the second drive pump. The second drive pump output hole 18 penetrates through the second cavity 4 to the outside of the second housing 2 and is connected to the filter assembly 19 outside the second housing 2.

[0040] The filter assembly 19 is located outside the second housing 2 and on the outside side of the intermediate cavity 5. The filter assembly 19 includes a filter tank 19.1, which is circular in structure. A fine filter and a cooler (both shown in the figure) are installed in the filter tank 19.1. The fine filter can filter the oil and remove impurities from the oil, and the cooler can cool the oil to prevent the oil temperature from getting too high.

[0041] Furthermore, the engine's internal components include a crankshaft mechanism and other transmission systems (not shown in the figures). Therefore, crankshaft holes 20 for mounting the crankshaft mechanism are provided on the first housing 1 and the second housing 2. An oil outlet 21 is also provided on the crankshaft hole 20 of the second housing 2. The oil outlet 21 is arranged radially along the crankshaft hole 20 and located inside the main board of the second housing 2, communicating with the inside of the crankshaft hole 20. Furthermore, an oil return port 19.2 is provided at the middle position of the filter tank 19.1. The oil return port 19.2 is connected to the oil outlet via a third pipe 22. The third pipe 22 is a pipe hole inside the main board of the second housing 2, and the rib formed by the third pipe 22 is located inside the second cavity 4. The crankshaft hole 20 is used to install the bearing assembly of the crankshaft mechanism. The oil sprayed from the oil outlet 21 can lubricate the bearing assembly, crankshaft and other structures in the crankshaft assembly. Furthermore, the rotation of the crankshaft assembly will cause the oil to be thrown out and splashed into other transmission structures inside the intermediate cavity 5, the first cavity 3 and the second cavity 4, thereby achieving lubrication of the entire internal transmission system of the engine.

[0042] When the second drive pump is working, it can pump the oil stored in the third collection chamber 6.3 to the filter assembly 19 through the second pipeline. After being filtered and cooled by the fine filter and cooler in the filter assembly 19, the oil is transported from the oil return port 19.2 in the filter tank 19.1 to the oil outlet 21 in the crankshaft bore 20 through the third pipeline 22. Under the action of a large oil pressure, the oil lubricates the components in the crankshaft bore 20 by spraying.

[0043] This design arranges three independent chambers (first chamber 3, second chamber 4, and intermediate chamber 5) inside the engine. Different oil storage chambers (first collection chamber 6.1, second collection chamber 6.2, and third collection chamber 6.3) collect, store, and transfer the oil within these chambers. This ensures that the oil in the first chamber 3, second chamber 4, and intermediate chamber 5 is kept at a low level, preventing excessive oil buildup that could cause churning in the moving parts. While maintaining effective lubrication of the internal system, this design also improves the overall performance of the engine. Furthermore, the rational arrangement of the oil storage chambers significantly optimizes the engine's internal oil circuit system, simplifies the oil path, and reduces the complexity of engine manufacturing.

Claims

1. An engine housing, characterized in that, It includes an intermediate cavity, a first cavity and a second cavity located on both sides of the intermediate cavity, and an oil storage cavity located below the intermediate cavity at the bottom of the housing. The oil storage cavity includes a first collection cavity, a second collection cavity and a third collection cavity. The first collection cavity is directly connected to the first cavity and the second cavity respectively. The second collection cavity is connected to the intermediate cavity. The first collection cavity and the second collection cavity are connected to the third collection cavity through a first drive pump in the first cavity. The third collection cavity is connected to the transmission system through a second drive pump in the second cavity.

2. An engine housing according to claim 1, characterized in that, The first chamber has a first oil drain port at its bottom, and the second chamber has a second oil drain port at its bottom. The first oil drain port and the second oil drain port are located on the top sides of the first collection chamber.

3. An engine housing according to claim 2, characterized in that, The bottom of the intermediate cavity is provided with an intermediate oil drain hole, and on both sides of the intermediate oil drain hole are guide plates that are inclined downward and face the second collection cavity.

4. An engine housing according to claim 1, characterized in that, The first collection chamber is provided with a first oil outlet, the bottom of the second collection chamber is provided with a second oil outlet, the first drive pump is arranged close to the second oil outlet, the first oil outlet is connected to the input end of the first drive pump through a first pipeline, and the second oil outlet is directly connected to the input end of the first drive pump.

5. An engine housing according to any one of claims 1 to 4, characterized in that, It includes a first housing and a second housing. The first cavity is located on one side of the first housing and the second cavity is located on one side of the second housing. After the first housing and the second housing are assembled, an intermediate cavity is formed between the side of the first housing away from the first cavity and the side of the second housing away from the second cavity.

6. An engine housing according to claim 5, characterized in that, The transmission system includes a crankshaft mechanism. The first housing and the second housing are provided with crankshaft holes for mounting the crankshaft mechanism. The crankshaft hole on the second housing is provided with an oil outlet.

7. An engine housing according to claim 6, characterized in that, The second drive pump is located near the crankshaft bore. The input end of the second drive pump is connected to the third collection chamber through the second pipeline. The output end of the second drive pump is equipped with a filter assembly.

8. An engine housing according to claim 7, characterized in that, The filter assembly is located outside the housing. The filter assembly includes a filter tank, inside which a fine filter and a cooler are installed. An oil return port is located in the middle of the filter tank.

9. An engine housing according to claim 8, characterized in that, The return port is connected to the outlet port via a third pipeline.

10. An engine housing according to any one of claims 1 to 4, characterized in that, The second collecting chamber is located between the first collecting chamber and the third collecting chamber. The volume of the second collecting chamber is smaller than the volume of the first collecting chamber, and the volume of the first collecting chamber is smaller than the volume of the third collecting chamber.

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