Engine with dry area and wet area

Abstract

The utility model discloses a dry and wet partitioned engine which comprises a shell, the shell comprises a main cavity, a clutch cavity is arranged on the back side of the main cavity of the shell, an electric starting cavity is arranged on the side, far away from the clutch cavity, of the main cavity of the shell, a balance shaft is arranged in the electric starting cavity, and the balance shaft is connected with the clutch cavity. One end of the balance shaft is arranged in the electric starting cavity, the other end of the balance shaft penetrates through the shell to be arranged in the clutch cavity, and the end, arranged in the electric starting cavity, of the balance shaft is connected with a sealing unit. According to the engine with the dry area and the wet area, one side of the electric starting cavity of the motor is independent and sealed through the oil seal, the clutch cavity is communicated with the middle main cavity, mutual circulation of engine oil is kept, and the risk of oil leakage at the line outlet position of the electric starting side line is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of engine, especially relates to a dry and wet partitioned engine. BACKGROUND

[0002] For example, the publication number "CN109139324A" discloses "a motorcycle engine electric starting structure", which comprises a starting motor, the starting motor is connected with the crankshaft through a large double gear, a small double gear, a clutch starting gear and an overrunning clutch in sequence, the large double gear comprises a rotating shaft, a large gear, a transmission gear and a pinion are arranged on the rotating shaft, the large gear rotates synchronously with the rotating shaft, the pinion is rotatable relative to the rotating shaft, the transmission gear is connected with the corresponding outer helical spline segment on the rotating shaft through the inner helical spline groove and can move along the rotation direction of the outer helical spline, the transmission gear and the pinion are adjacent and have a spacing in the axial direction, and the opposite end faces are respectively provided with meshable end face teeth, and a return elastic mechanism is arranged between the end face teeth, and the motorcycle engine electric starting structure further comprises an elastic rotation resisting mechanism for providing friction rotation resisting force to the transmission gear. However, in actual application, the structure of the motorcycle engine electric starting structure will cause the electric starting parts to be mixed with oil in the clutch, which is not conducive to creating a dry working environment for the electric starting device, and the oil seepage and leakage of the electric starting device also need to be considered, and since the electric starting device needs wiring, there is a risk of oil leakage. SUMMARY

[0003] In view of the problems that the prior art cannot guarantee the dry working environment of the electric starting and seepage and leakage of oil, the utility model provides a dry and wet partitioned engine, one side of a motor electric starting cavity is independent, sealed by an oil seal, and a clutch cavity and an intermediate main cavity are communicated, oil is kept circulating, and the risk of oil leakage at the line outlet position of the electric starting side is reduced.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme.

[0005] A dry and wet partitioned engine comprises a shell, the shell comprises a main cavity, the shell is provided with a clutch cavity on the back side of the main cavity, the shell is provided with an electric starting cavity on the side of the main cavity away from the clutch cavity, a balance shaft is arranged in the electric starting cavity, one end of the balance shaft is arranged in the electric starting cavity, the other end of the balance shaft penetrates through the shell and is arranged in the clutch cavity, and a sealing unit is connected to one end of the balance shaft arranged in the electric starting cavity.

[0006] In the design of motorcycle power system in the contemporary, the integration of electric starter cavity and clutch cavity has become the mainstream design paradigm in the industry. Based on the consideration of space intensification and manufacturing cost control, the electric starter assembly is directly integrated in the clutch side cover. However, this non-partition type cavity design still has many application defects in the existing background. One of them is that the two components share a lubrication system. Since the electric starter assembly and the clutch assembly share the same oil circulation system, the electric starter gear set is directly exposed to the lubricating oil environment of the clutch mechanism. At the same time, this structure needs to use the whole casting process, and the wiring hole of the electric starter assembly shares the same side cover component with the oil channel opening. In addition, the electric starter gear and the clutch shaft are coupled through the umbrella gear. Although the above structure design can reduce the manufacturing cost and the overall size of the engine, the current mechanism design has many defects.

[0007] In the existing engine, in order to meet the wiring needs of the electric starting system, the shell needs to be provided with a wire harness passage. The wire harness will swing under vibration conditions, which will cause the wire harness to impact the sealing ring, thereby increasing the failure probability of the sealing structure. When the sealing structure fails, since the electric starter assembly and the clutch assembly are located in the same cavity, and the clutch assembly needs to be lubricated by oil, when the sealing ring fails, the oil in the cavity will leak out of the sealing structure. At the same time, the chemical corrosion between the oil-resistant rubber sealing element and the wire harness insulation layer will accelerate the aging of the sealing structure. Since the electric starter assembly and the clutch assembly are arranged together, the side cover needs to be replaced as a whole during maintenance. At the same time, when replacing and maintaining the electric starter assembly or the clutch assembly, the clutch assembly or the electric starter assembly also needs to be disassembled synchronously, which reduces the efficiency of maintenance and replacement, increases the cost, and also makes the replacement of the electric starter assembly more complicated. At the same time, since the electric starter assembly and the clutch assembly are arranged in the same cavity, there are many restrictions on the overall arrangement structure, and the arrangement method is relatively single and not flexible, which will also affect the overall layout structure of the motorcycle. Although the manufacturing cost can be saved, the maintenance cost will be higher in the actual use: when replacing the starter motor, the entire clutch assembly needs to be disassembled, which increases the labor cost; during regular maintenance, the clutch lubricating oil that can still be used is forced to be replaced; and due to oil pollution, electrical and mechanical faults are coupled, which also increases the difficulty of troubleshooting.

[0008] Therefore, to address this type of problem in the prior art, this application provides an electric start cavity and a clutch cavity on both sides of the main cavity. The electric start cavity houses the electric start assembly, while the clutch cavity houses the clutch assembly. Since the two assemblies are located on opposite sides of the main cavity, and transmission is required between them, a balance shaft is provided between the clutch cavity and the electric start cavity. The balance shaft penetrates the housing, with its two ends located inside the electric start cavity and the clutch cavity, respectively. This allows the electric start assembly and the clutch assembly to transmit power through the balance shaft without creating a connection between the two cavities. Even the balance shaft is equipped with a sealing unit to seal the passage between the electric start cavity and the clutch cavity, preventing oil from entering the electric start cavity through the balance shaft and ensuring a dry and oil-free environment inside the electric start cavity. Therefore, during subsequent maintenance, if the clutch assembly or electric start assembly fails, only the faulty side can be opened for treatment, thus avoiding the cost of disassembling unrelated parts. Through the above arrangement method, the components in the electric start chamber are not immersed in oil, thereby preventing corrosion of the wiring materials and preventing oil from affecting the normal operation of the electric start assembly. Furthermore, when the electric start chamber is perforated for wiring, oil leakage from the wiring points can be prevented, ensuring the cleanliness of the entire engine and the safety of its operation.

[0009] Preferably, the housing contains an independently sealed crankshaft movable cavity, which includes a communicating opening connected to a cylinder block. The crankshaft movable cavity, containing a crankshaft unit, has a communicating opening connected to the cylinder block, forming the space for piston movement. The two sides of the crankshaft movable cavity are not connected; they are respectively connected to an electric starter chamber and a clutch chamber.

[0010] Preferably, a crankshaft unit and a motor unit are disposed within the electric start cavity, with the motor unit and balance shaft respectively disposed on opposite sides of the crankshaft unit. The crankshaft unit, which extends through the crankshaft moving cavity, the electric start cavity, and the clutch cavity, is sealed to prevent communication between the three cavities and the entry of oil from the clutch cavity.

[0011] Preferably, the housing contains a balance shaft cavity that connects to the main cavity. An oil inlet is provided between the balance shaft cavity and the main cavity, and a sealing unit is provided between the balance shaft cavity and the electric starter cavity. The balance shaft cavity inside the housing is connected to the main cavity, and the oil inlet allows oil from the main cavity to be delivered to it. The sealing unit between the balance shaft cavity and the electric starter cavity prevents oil from entering the electric starter cavity, thus ensuring adequate lubrication of the balance shaft.

[0012] Preferably, the balance shaft cavity is provided with a settling groove, and the settling groove has lubrication openings on both sides facing the end of the balance shaft. Bearing units are arranged on the side of the lubrication openings away from the settling groove. The settling groove inside the balance shaft cavity, with lubrication openings on both sides, allows oil in the settling groove to be transported to the bearings on both sides. Due to its settling structure, the settling groove can store oil, thus preventing insufficient oil lubrication of the bearings.

[0013] Preferably, a transmission assembly is disposed within the clutch chamber, the position of which corresponds to the position of the main chamber. A crankshaft unit is also disposed within the clutch chamber, with one end positioned within the clutch chamber and the other end penetrating the housing and disposed within the electric start chamber. The placement of the transmission assembly within the clutch chamber, aligned with the position of the main chamber, ensures proper lubrication of the transmission assembly by the hydraulic fluid.

[0014] Preferably, the clutch chamber has a flow hole in the area where the transmission assembly is located, and the flow hole connects the main chamber and the clutch chamber. The flow hole in the clutch chamber, located on the transmission assembly, allows oil from the main chamber to be delivered to the transmission assembly, achieving lubrication of the transmission assembly.

[0015] Preferably, two flow holes are provided, one on the upper side and one on the lower side of the transmission assembly. Providing two flow holes, and positioning them on the upper and lower sides of the transmission assembly, ensures more uniform oil flow.

[0016] Preferably, the transmission assembly includes a main shaft and a secondary shaft, with a flow hole provided between the main shaft and the secondary shaft; the transmission assembly includes a shift lever and a shift drum, with a flow hole provided between the shift lever and the shift drum; the areas between the main shaft and the secondary shaft, and between the shift lever and the shift drum, are reserved plates, and the flow hole is opened near the edge contour of the reserved plate. By placing the flow hole between the main shaft and the secondary shaft, and between the shift lever and the shift drum, it is ensured that the oil in the flow hole can be evenly lubricated to the main shaft and secondary shaft on both sides, as well as the shift lever and the shift drum on both sides. Furthermore, by opening the flow hole along the edge contour of the reserved plate, the opening size of the flow hole can be maximized, ensuring maximum oil flow.

[0017] Preferably, the electric starter cavity is provided with a cable outlet, and a cable outlet unit is provided on the cable outlet. By providing a cable outlet on the electric starter cavity and a cable outlet unit on the cable outlet, the placement of the cable outlet unit is more flexible since the electric starter cavity is not connected to the clutch cavity. Furthermore, since there is no need to consider whether the opening of the cable outlet unit will leak oil, the cable outlet can be placed at a lower position without worrying about oil leaking downwards.

[0018] The beneficial effects of this utility model are as follows:

[0019] (1) One side of the motor electric start chamber is independent and sealed by an oil seal, while the clutch chamber is connected to the main chamber in the middle to keep the oil flowing between each other and reduce the risk of oil leakage at the outlet of the electric start side line.

[0020] (2) It can ensure sufficient lubrication of the balance shaft, while preventing lubricating oil from entering the electric starter cavity through the position of the balance shaft;

[0021] (3) It can ensure the flow of oil in the clutch chamber and the main chamber, and ensure sufficient lubrication of the transmission components in the clutch chamber. Attached Figure Description

[0022] Figure 1 This is an isometric sectional view of this utility model.

[0023] Figure 2 This is the first isometric drawing of this utility model.

[0024] Figure 3 This is the second isometric drawing of this utility model.

[0025] Figure 4 This is an internal schematic diagram of the present invention.

[0026] Figure 5 This is the third axonometric drawing of this utility model.

[0027] In the picture:

[0028] 1. Shell;

[0029] 2 main cavity;

[0030] 3. Clutch chamber, 31. Transmission assembly, 32. Flow hole, 33. Main shaft, 34. Sub-shaft, 35. Shift lever, 36. Shift drum;

[0031] 4. Electric start chamber, 41. Motor unit, 42. Cable outlet, 43. Cable outlet unit;

[0032] 5 Balance shaft, 51 Balance shaft cavity, 52 Oil inlet, 53 Settling groove, 54 Lubrication opening, 55 Bearing unit;

[0033] 6. Crankshaft movable cavity, 61. Connecting opening, 62. Crankshaft unit. Detailed Implementation

[0034] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0035] Example 1:

[0036] like Figure 1 , 2 As shown, a dry and wet zone engine includes a housing 1, which includes a main cavity 2. A clutch cavity 3 is provided on the back side of the main cavity 2. An electric start cavity 4 is provided on the side of the main cavity 2 away from the clutch cavity 3. A balance shaft 5 is provided in the electric start cavity 4. One end of the balance shaft 5 is located in the electric start cavity 4, and the other end of the balance shaft 5 passes through the housing 1 and is located in the clutch cavity 3. A sealing unit is connected to the end of the balance shaft 5 located in the electric start cavity 4.

[0037] In contemporary motorcycle powertrain design, the integrated layout of the electric starter chamber 4 and the clutch chamber has become the mainstream design paradigm in the industry. Based on considerations of space efficiency and manufacturing cost control, the electric starter assembly is directly integrated inside the clutch side cover. However, this non-partitioned chamber design still has several application drawbacks under current conditions. One is that the two components share a lubrication system: because the electric starter assembly and the clutch assembly share the same oil circulation system, the electric starter gear set is directly exposed to the clutch mechanism's lubricating oil environment. Additionally, this type of structure requires an integral casting process, and the wiring holes and oil passage openings of the electric starter assembly share the same side cover assembly. Furthermore, the electric starter gear and the clutch main shaft 33 achieve power coupling through bevel gears. Although the above structural design can reduce manufacturing costs and shrink the overall size of the engine, the current mechanism design has many shortcomings.

[0038] Because the electric starter chamber 4 and the clutch chamber share a single chamber structure, the components of the electric starter system are constantly immersed in high-temperature lubricating oil containing metal debris. In existing technology, the lubricating oil temperature in the clutch chamber can reach 95-115℃ and contains metal wear particles with a diameter of 5-20μm. This special operating condition causes triple damage to the electric starter system: simultaneously, an oil film forms on the surface of the starter motor carbon brushes in the electric starter assembly, increasing contact resistance, and prolonged oil immersion will shorten the carbon brush life; and the metal particles cause abrasive wear on the meshing surface of the electric starter gears, leading to wear and reduced service life during use.

[0039] In existing engines, to meet the wiring requirements of the electric start system, housing 1 needs to have a wiring harness channel. Under vibration, the wiring harness will swing, impacting the sealing ring and increasing the probability of seal failure. When the seal fails, since the electric start assembly and clutch assembly are located in the same cavity, and the clutch assembly requires lubrication, the lubricant will leak out when the seal partially fails. Simultaneously, the oil-resistant rubber seals and wiring harness insulation layer are chemically corroded, accelerating the aging of the seal. Furthermore, because the electric start assembly and clutch assembly are located together, the entire side cover needs to be replaced during maintenance. Replacing or maintaining either the electric start assembly or the clutch assembly also requires simultaneous disassembly, reducing maintenance efficiency and increasing costs. Even replacing only the electric start assembly is cumbersome because it is also immersed in lubricant. Furthermore, since the electric starter assembly and clutch assembly are housed in the same cavity, there are many restrictions on the overall layout structure, and the layout method is relatively simple and inflexible, which also affects the overall layout structure of the motorcycle. While it may save on manufacturing costs, this translates into higher maintenance costs in actual use: replacing the starter motor requires disassembling the entire clutch assembly, increasing labor costs; routine maintenance necessitates replacing the clutch lubricant, which could otherwise be used; and oil contamination can lead to electrical and mechanical faults coupling, increasing the difficulty of troubleshooting.

[0040] Therefore, to address this type of problem in the prior art, this application provides an electric start chamber 4 and a clutch chamber 3 on both sides of the main cavity 2. The electric start chamber 4 houses the electric start assembly, while the clutch chamber houses the clutch assembly. Since the two sides are respectively located on both sides of the main cavity 2, and the two assemblies need to be transmitted between each other, a balance shaft 5 is provided between the clutch chamber 3 and the electric start chamber 4. The balance shaft 5 penetrates the housing 1, and its two ends are located inside the electric start chamber 4 and the clutch chamber 3, respectively. This allows the electric start assembly and the clutch assembly to be transmitted through the balance shaft 5 without creating a connection between the electric start chamber 4 and the clutch chamber 3. Even the balance shaft 5 is equipped with a sealing unit to seal the channel between the electric start chamber 4 and the clutch chamber 3, preventing oil inside the clutch chamber 3 from entering the electric start chamber 4 through the balance shaft 5, thus ensuring that the environment inside the electric start chamber 4 is dry and oil-free. Therefore, during subsequent maintenance, if the clutch assembly or electric start assembly fails, only the faulty side can be opened for treatment, thus avoiding the cost of disassembling unrelated parts. Through the above arrangement method, the components in the electric start chamber 4 are not soaked in oil, thereby preventing the wiring material from being corroded. At the same time, the oil is prevented from affecting the normal operation of the electric start assembly. Furthermore, when the electric start chamber 4 is perforated for wiring, oil leakage from the wiring points is prevented, ensuring the cleanliness of the entire engine and the safety of its operation.

[0041] like Figure 4 As shown, a sealed crankshaft movable cavity 6 is provided inside the housing 1. The crankshaft movable cavity 6 includes a connecting opening 61, which is connected to the cylinder block. The crankshaft movable cavity 6 is provided inside the housing 1, and a crankshaft unit is provided inside the crankshaft movable cavity 6. The connecting opening 61 is provided on the crankshaft movable cavity 6, and the connecting opening 61 is connected to the cylinder block, which is the space for piston movement. The two sides of the crankshaft movable cavity are not connected. The two sides of the crankshaft movable cavity are respectively connected to the electric start cavity 4 and the clutch cavity 3.

[0042] like Figure 2 As shown, a crankshaft unit 62 and a motor unit 41 are housed within the electric starter cavity 4. The motor unit 41 and the balance shaft 5 are respectively located on both sides of the crankshaft unit 62. The crankshaft unit 62, which is located inside the electric starter cavity 4, passes through the crankshaft moving cavity 6, the electric starter cavity 4, and the clutch cavity 3, and is sealed to prevent communication between the three cavities, which would allow oil from the clutch cavity 3 to enter. This ensures that the environment inside the electric starter cavity 4 is dry and oil-free, preventing the components inside the electric starter cavity 4 from being contaminated with oil, thus avoiding corrosion of the wiring materials and preventing oil from affecting the normal operation of the electric starter assembly.

[0043] like Figure 4 ,5 As shown, a balance shaft cavity 51 is provided inside the housing 1, which is connected to the main cavity 2. An oil inlet 52 is provided between the balance shaft cavity 51 and the main cavity 2, and a sealing unit is provided between the balance shaft cavity 51 and the electric start cavity 4. The balance shaft cavity 51 inside the housing 1 can communicate with the main cavity 2. An oil inlet 52 is provided in the balance shaft cavity 51, through which oil in the main cavity 2 can be transported to the balance shaft cavity 51. The sealing unit between the balance shaft cavity 51 and the electric start cavity 4 prevents oil in the balance shaft cavity 51 from entering the electric start cavity 4. Through this arrangement, the balance shaft 5 can be adequately lubricated.

[0044] like Figure 4 As shown, a settling groove 53 is provided inside the balance shaft cavity 51. Lubrication openings 54 are provided on both sides of the settling groove 53 facing the end of the balance shaft 5. Bearing units 55 are provided on the side of the lubrication openings 54 away from the settling groove 53. The settling groove 53 inside the balance shaft cavity 51, with lubrication openings 54 on both sides, allows oil in the settling groove 53 to be transported to the bearings on both sides. Due to its settling structure, the settling groove 53 can store oil, thus preventing insufficient oil for lubricating the bearings.

[0045] like Figure 3 As shown, a transmission assembly 31 is installed inside the clutch chamber 3, and the position of the transmission assembly 31 corresponds to the position of the main chamber 2. A crankshaft unit is installed inside the clutch chamber 3, with one end of the crankshaft unit located in the clutch chamber 3 and the other end penetrating through the housing 1 and installed in the electric start chamber 4. The transmission assembly 31 is installed inside the clutch chamber 3, and its position is aligned with the position of the main chamber 2, which ensures the lubrication of the transmission assembly 31 by the oil.

[0046] like Figure 3 As shown, the clutch chamber 3 has a flow hole 32 in the area where the transmission assembly 31 is located. The flow hole 32 connects the main chamber 2 and the clutch chamber 3. The flow hole 32 is provided in the clutch chamber 3, and since the flow hole 32 is located on the transmission assembly 31, it can transport the oil inside the main chamber 2 to the transmission assembly 31, thereby achieving the lubrication effect of the transmission assembly 31.

[0047] like Figure 3 As shown, two flow holes 32 are provided, one on the upper side and one on the lower side of the transmission assembly 31. By providing two flow holes 32 and placing them on the upper and lower sides of the transmission assembly 31, the oil flow through the flow holes 32 can be made more uniform.

[0048] like Figure 3As shown, the transmission assembly 31 includes a main shaft 33 and a countershaft 34, with a flow hole 32 provided between the main shaft 33 and the countershaft 34; the transmission assembly 31 includes a shift lever 35 and a shift drum 36, with a flow hole 32 provided between the shift lever 35 and the shift drum 36; the areas between the main shaft 33 and the countershaft 34, and between the shift lever 35 and the shift drum 36, are reserved plates, and the flow hole 32 is opened near the edge contour of the reserved plate. By placing the flow hole 32 between the main shaft 33 and the countershaft 34, and between the shift lever 35 and the shift drum 36, it is possible to ensure that the oil in the flow hole 32 can be evenly lubricated to the main shaft 33 and the countershaft 34 on both sides, as well as the shift lever 35 and the shift drum 36 on both sides. Furthermore, by opening the flow hole 32 along the edge contour of the reserved plate, the opening size of the flow hole 32 can be maximized, ensuring maximum oil flow.

[0049] like Figure 2 As shown, the electric starter cavity 4 is provided with a cable outlet opening 42, and a cable outlet unit 43 is provided on the cable outlet opening 42. Since the electric starter cavity 4 is not connected to the clutch cavity 3, the placement of the cable outlet unit 43 is more flexible. Furthermore, since there is no need to consider whether the opening of the cable outlet unit 43 will leak oil, the cable outlet opening 42 can also be placed at a lower position without worrying about oil leaking towards the lower area.

[0050] This invention provides a dry / wet zone engine. One side of the electric starter chamber is independent and sealed with an oil seal, while the clutch chamber is connected to the main chamber in the middle, maintaining oil circulation and reducing the risk of oil leakage at the wiring outlet on the electric starter side. This structure achieves the following beneficial effects: one side of the electric starter chamber 4 is independent and sealed with an oil seal, while the clutch chamber is connected to the main chamber 2 in the middle, maintaining oil circulation and reducing the risk of oil leakage at the wiring outlet on the electric starter side; it ensures sufficient lubrication of the balance shaft 5 while preventing lubricating oil from entering the electric starter chamber 4 through the balance shaft 5; it ensures oil circulation in the clutch chamber 3 and the main chamber 2, ensuring sufficient lubrication of the transmission assembly 31 in the clutch chamber 3.

Claims

1. An engine with dry and wet separation, characterized in that, The device includes a housing, which includes a main cavity. A clutch cavity is provided on the back side of the main cavity. An electric start cavity is provided on the side of the main cavity away from the clutch cavity. A balance shaft is provided in the electric start cavity. One end of the balance shaft is located in the electric start cavity, and the other end of the balance shaft passes through the housing and is located in the clutch cavity. A sealing unit is connected to the end of the balance shaft located in the electric start cavity.

2. The dry-wet partitioned engine according to claim 1, characterized in that, The housing contains an independently sealed crankshaft movable cavity, which includes a connecting opening connected to a cylinder block.

3. The dry-wet partitioned engine according to claim 1, characterized in that, The electric start cavity contains a crankshaft unit and a motor unit, with the motor unit and balance shaft respectively located on both sides of the crankshaft unit.

4. The dry-wet partitioned engine according to claim 1, characterized in that, The housing contains a balance shaft cavity, which is connected to the main cavity. An oil inlet is provided between the balance shaft cavity and the main cavity, and a sealing unit is provided between the balance shaft cavity and the electric start cavity.

5. A dry-wet zone engine according to claim 4, characterized in that, The balance shaft cavity is provided with a settling groove, and the settling groove has lubrication openings on both sides facing the end of the balance shaft. A bearing unit is provided on the side of the lubrication openings away from the settling groove.

6. A dry-wet zone engine according to any one of claims 1-5, characterized in that, The clutch chamber is equipped with a transmission assembly, the transmission assembly being positioned corresponding to the main chamber. The clutch chamber is also equipped with a crankshaft unit, one end of which is located in the clutch chamber and the other end of which passes through the housing and is located in the electric start chamber.

7. A dry-wet zoned engine according to claim 6, characterized in that, The clutch chamber has a flow hole in the area where the transmission assembly is located, and the flow hole connects the main chamber and the clutch chamber.

8. A dry-wet zone engine according to claim 7, characterized in that, There are two flow holes, which are respectively located on the upper and lower sides of the transmission assembly.

9. An engine with dry and wet partitioning according to claim 7, characterized in that, The transmission assembly includes a main shaft and a secondary shaft, with a flow hole provided between the main shaft and the secondary shaft; the transmission assembly includes a gear shift lever and a gear shift drum, with a flow hole provided between the gear shift lever and the gear shift drum; the area between the main shaft and the secondary shaft and the area between the gear shift lever and the gear shift drum are reserved plates, and the flow hole is opened near the edge contour of the reserved plate.

10. A dry-wet zone engine according to any one of claims 1-5, characterized in that, The electric start cavity is provided with a wire outlet, and a wire outlet unit is provided on the wire outlet.

Images