Motorcycle engine and motorcycle

Abstract

According to the motorcycle engine and the motorcycle, the motorcycle engine comprises a gearbox, a crankcase, an oil pan and an oil cooler, a gearbox chamber of the gearbox is not communicated with a crankcase chamber of the crankcase, and a first oil return chamber communicated with the crankcase chamber and a second oil return chamber communicated with the gearbox chamber are inwards formed in the oil pan. A first engine oil pump and a second engine oil pump are mounted on the oil pan, and the first engine oil pump can extract engine oil from the first oil return cavity and inject the engine oil to a change gear set of the gearbox; and the second engine oil pump can extract engine oil from the second oil return chamber and discharge the engine oil to the oil cooler. The other one of the gearbox and the crankcase is not influenced when one of the gearbox and the crankcase breaks down, so that the subsequent maintenance cost can be reduced, and the working reliability of the motorcycle engine is improved; in addition, full lubrication and cooling of a change gear set in the gearbox can be achieved, the service life of the gearbox is prolonged, and the motorcycle engine can be suitable for large-displacement motorcycles.

Description

Technical Field

[0001] The present application belongs to the technical field related to motorcycles, and in particular, relates to a motorcycle engine and a motorcycle. Background Art

[0002] With the development of the motorcycle industry, motorcycles are not only a means of daily transportation and commuting. Recreational and leisure motorcycles have been loved by consumers. People are more pursuing motorcycles with large displacement and superior performance, mainly including large-displacement street cars, touring cars and racing models. The engines of this type of car have superior performance, high speed, high power per liter, large heat load, and diversified usage scenarios. In addition, due to the high value of the product, the maintenance cost is very high, which puts higher requirements on the reliability and maintenance convenience of the engine.

[0003] At present, the existing motorcycle engine usually connects the gearbox with the crankcase, and the crankshaft in the crankcase can splash the oil into the speed gear set of the gearbox during the high-speed rotation, and realize the cooling and lubrication of the speed gear set. However, the motorcycle engine with large displacement performance requires high speed and large engine heat load, and the amount of oil splashed from the crankcase is small, and the speed gear set cannot be fully lubricated and cooled, which will lead to a low safety factor for the use of the gearbox, and easily cause problems such as wear of the moving parts on the speed gear set, pitting of gears, broken teeth, and disintegration of bearings. In addition, since the gearbox is connected to the crankcase, when the motorcycle engine is working, once one of the gearbox and the crankcase fails, the impurities generated by the failure will enter the other, and eventually both the gearbox and the crankcase will be damaged, which will increase the maintenance cost. Summary of the invention

[0004] In view of this, it is necessary to provide a motorcycle engine and a motorcycle for solving the above-mentioned technical problems.

[0005] A motorcycle engine, comprising:

[0006] A gearbox is formed with a gearbox chamber inwardly;

[0007] A crankcase, inwardly forming a crankcase chamber, wherein the crankcase chamber is not connected to the transmission chamber;

[0008] The oil pan is formed with a first oil return chamber and a second oil return chamber inwardly, wherein the first oil return chamber is communicated with the crankcase chamber and is used to collect the oil falling back from the crankcase, and the second oil return chamber is communicated with the gearbox chamber and is used to collect the oil falling back from the gearbox;

[0009] Oil cooler;

[0010] Among them, a first oil pump and a second oil pump are installed on the oil pan, the first oil pump is arranged in the area where the first oil return chamber is located, and the first oil pump can draw oil from the first oil return chamber and spray it toward the speed gear set of the gearbox; the second oil pump is arranged in the area where the second oil return chamber is located, and the second oil pump can draw oil from the second oil return chamber and discharge it to the oil cooler.

[0011] It can be understood that the transmission chamber of the transmission is isolated from the crankcase chamber of the crankcase, so that the transmission and the crankcase are independent of each other and do not affect each other. Even if one of the transmission and the crankcase fails, it will not affect the other. This can reduce subsequent maintenance costs and improve the reliability of the motorcycle engine. In addition, the first oil pump is used to extract the oil in the first oil return chamber on the oil pan and spray it onto the speed gear set of the transmission. In this way, the speed gear set in the transmission can be fully lubricated and cooled, which can reduce the risk of wear and damage of the speed gear set, improve the service life of the transmission, and make the motorcycle engine suitable for large-displacement motorcycles.

[0012] In one embodiment, the oil pan is connected to and communicated with the gearbox, and the second oil pump is partially accommodated in the gearbox chamber.

[0013] It can be understood that the oil pan is directly connected to the gearbox, and the second oil pump is partially accommodated in the gearbox chamber, which can reduce the height of the oil pan in the area where the gearbox is located. The oil in the first oil return chamber on the oil pan is pumped to the speed gear set of the gearbox by the first oil pump, and the oil in the second oil return chamber is pumped to the oil cooler by the second oil pump. In this way, it is possible to avoid arranging the first oil pump at the lowest position of the oil pan, which not only saves space and simplifies the structure, but also makes the structure of the oil pan compact and reduces the overall height, thereby playing a role in improving the lightweight level of the motorcycle engine.

[0014] In one embodiment, an oil return passage is provided on the crankcase, and the crankcase chamber can be communicated with the first oil return chamber through the oil return passage;

[0015] The first oil pump is provided with an oil injection port, and the first oil pump can inject oil toward the speed change gear set through the oil injection port, wherein a flow area of ​​the oil injection port is larger than a flow area of ​​the oil return channel.

[0016] It can be understood that the flow area of ​​the oil injection port on the first oil pump is set larger than the flow area of ​​the oil return channel. In this way, the oil collected in the first oil return chamber on the oil pan can be discharged in time by the first oil pump, and the rapid and sufficient flow of the oil in the motorcycle engine can be achieved, and the oil level in the first oil return chamber will not rise to the crankshaft working area of ​​the crankcase, that is, it will not cause a negative impact on the operation of the crankshaft in the crankcase.

[0017] In one embodiment, the motorcycle engine further comprises a transmission gear set, and the second oil pump can be connected to the crankshaft in the crankcase through the transmission gear set;

[0018] Wherein, the second oil pump is drivingly connected to the first oil pump.

[0019] In one embodiment, the transmission gear set includes a driving gear, a first transition gear, a transmission shaft and a second transition gear, the driving gear is respectively connected to the speed change gear set and the first transition gear, the transmission shaft can pass through the housing of the gearbox and is respectively connected to the first transition gear and the second transition gear;

[0020] The second oil pump has an oil pump gear, and the oil pump gear is meshed with the second transition gear.

[0021] In one embodiment, the motorcycle engine further comprises a clutch, wherein the clutch is formed with a clutch chamber inwardly, and the clutch chamber is communicated with the first oil return chamber;

[0022] Wherein, the clutch chamber is not connected with the transmission chamber.

[0023] It can be understood that by isolating the clutch chamber from the gearbox chamber, the clutch and the gearbox can be independent of each other and do not affect each other, so that a failure in one of the clutch and the gearbox will not affect the other. This can reduce subsequent maintenance costs and improve the reliability of the motorcycle engine.

[0024] In one embodiment, the speed change gear set is drivingly connected to an input shaft, and the input shaft passes through the gearbox and extends into the clutch chamber;

[0025] Wherein, a lubricating oil passage is provided on the gearbox, an oil inlet passage is provided in the input shaft, and the lubricating oil passage is connected with the clutch chamber through the oil inlet passage for introducing engine oil into the clutch.

[0026] It is understandable that the oil inlet passage of the input shaft on the gearbox is used to provide the clutch with oil, so that lubrication and cooling of the clutch can be achieved during operation.

[0027] In one embodiment, the motorcycle engine further includes a clutch and a shift mechanism, wherein the shift mechanism is disposed on a side of the gearbox away from the clutch and is transmission-connected to the speed gear set.

[0028] It can be understood that the shift mechanism is arranged on a side of the gearbox away from the clutch, so that when the motorcycle engine is assembled on the motorcycle, the shift pedal on the motorcycle and the shift lever on the shift mechanism are arranged on the same side. In this way, the length of the shift lever can be shortened, and the shift lever is prevented from penetrating the gearbox. This can reduce the size of the gearbox, allow the gearbox to form a concave cavity, and increase the installation space for the assembly of other components on the motorcycle.

[0029] In one embodiment, the motorcycle engine further comprises a shift chamber cover, the shift chamber cover is detachably connected to the gearbox, and a shift chamber can be enclosed between the shift chamber cover and the gearbox;

[0030] Wherein, the shift mechanism is at least partially accommodated in the shift chamber.

[0031] It can be understood that the shift mechanism is arranged between the shift chamber cover and the gearbox, so that the shift mechanism can be isolated from the gearbox. In this way, when the shift mechanism is subsequently repaired, only the shift chamber cover needs to be opened, which facilitates the subsequent repair of the shift mechanism.

[0032] The present application also seeks protection for a motorcycle comprising the above-mentioned motorcycle engine.

[0033] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0034] The motorcycle engine and motorcycle protected by the present invention isolate the gearbox chamber of the gearbox from the crankcase chamber of the crankcase, so that the gearbox and the crankcase are independent of each other and do not affect each other. Even if one of the gearbox and the crankcase fails, it will not affect the other, which can reduce subsequent maintenance costs and improve the reliability of the motorcycle engine. In addition, the first oil pump is used to extract the oil in the first oil return chamber on the oil pan and spray it onto the speed gear set of the gearbox. In this way, the speed gear set in the gearbox can be fully lubricated and cooled, which can reduce the risk of wear and damage of the speed gear set, improve the service life of the gearbox, and make the motorcycle engine suitable for large-displacement motorcycles. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0036] Figure 1 A schematic diagram of the structure of a motorcycle engine provided in one embodiment of the present application;

[0037] Figure 2 for Figure 1 Exploded diagram of

[0038] Figure 3 A schematic structural diagram of a motorcycle engine from another perspective provided in one embodiment of the present application;

[0039] Figure 4 for Figure 3 Exploded diagram of

[0040] Figure 5 A cross-sectional view of a motorcycle engine provided by an embodiment of the present application;

[0041] Figure 6 for Figure 5 Enlarged view of the middle P part;

[0042] Figure 7 A cross-sectional view of a motorcycle engine from another perspective provided by an embodiment of the present application;

[0043] Figure 8 A schematic diagram of the structure of an oil pan provided in one embodiment of the present application;

[0044] Fig. 9 This is a schematic diagram of the structure of the first oil pump, the second oil pump and the transmission gear set provided in one embodiment of the present application when they are in transmission cooperation.

[0045] Reference numerals: 100, motorcycle engine; 10, gearbox; 101, gearbox chamber; 102, concave cavity; 110, lubricating oil passage; 11, speed change gear set; 12, input shaft; 121, oil inlet passage; 13, housing; 14, bearing; 15, bearing flange; 151, oil seal; 20, crankcase; 201, crankcase chamber; 30, oil sump; 310, oil cooler; 301, first oil return chamber; 302, second oil return chamber; 31. First oil pump; 311. Oil injection port; 32. Second oil pump; 321. Oil pump gear; 3132. Drive shaft; 33. Oil filter; 34. Oil filter element; 40. Transmission gear set; 41. Active gear; 42. First transition gear; 43. Transmission shaft; 44. Second transition gear; 50. Clutch; 501. Clutch chamber; 60. Shift mechanism; 61. Shift lever; 70. Shift chamber cover; 701. Shift chamber. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] It should be noted that when an element is referred to as being "provided on" another element, it may be directly provided on the other element or there may be a central element. When an element is considered to be "provided on" another element, it may be directly provided on the other element or there may be a central element at the same time. When an element is considered to be "fixed to" another element, it may be directly fixed to the other element or there may be a central element at the same time.

[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0049] The motorcycle engine 100 for which protection is sought in the present application is suitable for motorcycles with large displacement performance.

[0050] like Figure 1 , Figure 3 , Figure 5 , Figure 7 and Figure 8As shown, a motorcycle engine 100 provided in an embodiment of the present application includes a gearbox 10, a crankcase 20, an oil pan 30 and an oil cooler 310. The gearbox 10 is formed with a gearbox chamber 101 inwardly, and the crankcase 20 is formed with a crankcase chamber 201 inwardly, and the crankcase chamber 201 is not connected to the gearbox chamber 101; the oil pan 30 is formed with a first oil return chamber 301 and a second oil return chamber 302 inwardly, and the first oil return chamber 301 is connected to the crankcase chamber 201 for collecting the oil falling from the crankcase 20, and the second oil return chamber 302 is connected to the crankcase chamber 201 for collecting the oil falling from the crankcase 20. The gearbox chamber 101 is connected and is used to collect the oil falling back from the gearbox 10; wherein, the first oil pump 31 and the second oil pump 32 are installed on the oil pan 30, the first oil pump 31 is arranged in the area where the first oil return chamber 301 is located, and the first oil pump 31 can draw oil from the first oil return chamber 301 and spray it toward the speed gear set 11 of the gearbox 10; the second oil pump 32 is arranged in the area where the second oil return chamber 302 is located, and the second oil pump 32 can draw oil from the second oil return chamber 302 and discharge it to the oil cooler 310.

[0051] It can be understood that the transmission chamber 101 of the transmission 10 is isolated from the crankcase chamber 201 of the crankcase 20, so that the transmission 10 and the crankcase 20 are independent of each other and do not affect each other. Even if one of the transmission 10 and the crankcase 20 fails, it will not affect the other. This can reduce subsequent maintenance costs and improve the reliability of the motorcycle engine 100. In addition, the first oil pump 31 is used to extract the oil in the first oil return chamber 301 on the oil pan 30 and spray it onto the speed gear set 11 of the transmission 10. In this way, the speed gear set 11 in the transmission 10 can be fully lubricated and cooled, which can reduce the risk of wear and damage to the speed gear set 11, thereby improving the service life of the transmission 10 and making the motorcycle engine 100 suitable for large-displacement motorcycles.

[0052] like Figure 7 As shown, in some embodiments, the oil pan 30 is connected and communicated with the gearbox 10, and the second oil pump 32 is partially accommodated in the gearbox chamber 101. That is to say, the portion of the oil pan 30 located in the area where the gearbox 10 is located is directly connected to the gearbox 10, and there is no partition between the two, which can reduce the height of the oil pan 30 in the area where the gearbox 10 is located. At the same time, it also plays a role in saving the bottom wall of the gearbox 10, thereby improving the lightweight level of the motorcycle engine 100. It should be noted that the above-mentioned improvement of the lightweight level of the motorcycle engine 100 specifically refers to reducing the overall material used in the production of the motorcycle engine 100 and reducing the overall weight of the motorcycle engine 100.

[0053] It should be noted that, due to the separate oil pump design and independent oil collection system setting adopted in the existing motorcycle engine, the oil pump must be placed at the lowest position, and the temperature distribution of the returned oil in the oil pan is also uneven. The temperature difference of the oil collected in various parts of the oil pan is large, and the temperature balance cannot be achieved quickly, so the performance of the lubrication and cooling system cannot be fully exerted. The present application uses a first oil pump 31 to pump the oil in the first oil return chamber 301 on the oil pan 30 to the speed gear set 11 of the gearbox 10, and realizes the lubrication and cooling of the speed gear set 11, and then uses a second oil pump 32 to pump the oil in the second oil return chamber 302 on the oil pan 30 to the oil cooler 310, so that the oil subsequently cooled by the oil cooler 310 is provided by the gearbox 10. This can ensure that the temperature of the oil pumped to the oil cooler 310 reaches a balance, and the performance of the lubrication and cooling system is improved. In addition, the oil pan 30 of the present application is arranged and applied with the first oil pump 31 and the second oil pump 32, so that the first oil pump 31 can be avoided from being arranged at the lowest position of the oil pan 30, and the height of the oil pan 30 in the area where the second oil pump 32 is located can be reduced, which can not only save space and simplify the structure, but also make the structure of the oil pan 30 compact and reduce the overall height, thereby improving the lightweight level of the motorcycle engine 100. Of course, if Figure 8 As shown, the oil pan 30 is equipped with oil filters 33 on the first oil return chamber 301 and the second oil return chamber 302 respectively to perform primary filtration on the collected oil, and the oil pan 30 can also be equipped with an oil filter element 34 to perform secondary filtration on the oil discharged to the oil cooler 310, which will not be elaborated here.

[0054] like Figure 7 As shown, in some embodiments, the crankcase 20 is provided with an oil return passage (not shown), and the crankcase chamber 201 can be connected to the first oil return chamber 301 through the oil return passage; the first oil pump 31 is provided with an oil injection port 311, and the first oil pump 31 can inject oil toward the speed gear set 11 through the oil injection port 311, wherein the flow area of ​​the oil injection port 311 is larger than the flow area of ​​the oil return passage. In this way, when the first oil pump 31 is working, the oil collected in the first oil return chamber 301 can be injected toward the speed gear set 11 in a timely manner, so that the oil in the motorcycle engine 100 can flow quickly, and the oil in the first oil return chamber 301 will not be discharged in time, so that the liquid level will not rise to the crankshaft (not shown) working area of ​​the crankcase 20, that is, it will not cause a negative impact on the work of the crankshaft in the crankcase 20. It should be noted that when the engine oil enters the crankshaft working area of ​​the crankcase 20 , the engine oil will produce resistance to the operation of the crankshaft and have a negative impact on the power of the motorcycle engine 100 when it is working.

[0055] like Figure 5 , Figure 6 As shown, in some embodiments, the motorcycle engine 100 further includes a transmission gear set 40, and the second oil pump 32 can be transmission-connected to the speed change gear set 11 of the gearbox 10 through the transmission gear set 40; wherein, the second oil pump 32 is transmission-connected to the first oil pump 31. That is, when the motorcycle engine 100 is working, the gearbox 10 can drive the second oil pump 32 and the first oil pump 31 to work under the transmission of the transmission gear set 40.

[0056] It should be noted that if Figure 7 As shown, the first oil pump 31 and the second oil pump 32 can specifically share a driving shaft 3132, so that the first oil pump 31 can work synchronously with the second oil pump 32. Of course, how the first oil pump 31 and the second oil pump 32 share a driving shaft 3132 and how to realize the working principle of oil extraction during operation can adopt the currently existing conventional methods, which will not be elaborated here.

[0057] like Figure 5 , Fig. 9 As shown, exemplarily, the transmission gear set 40 includes a driving gear 41, a first transition gear 42, a transmission shaft 43 and a second transition gear 44, the driving gear 41 is respectively connected to the speed gear set 11 and the first transition gear 42, and the driving gear 41 can be mounted on the input shaft 12 of the speed gear set 11 in a circumferentially limited manner and meshed with the first transition gear 42; the transmission shaft 43 can pass through the housing 13 of the gearbox 10 and be respectively connected to the first transition gear 42 and the second transition gear 44, and the transmission shaft 43 can be connected to the first transition gear 42 or the second transition gear 44 as a whole, and a bearing (not shown) is mounted on the outside of the transmission shaft 43, so that the transmission shaft 43 can be rotatably connected to the housing 13 through the bearing; wherein, the second oil pump 32 has an oil pump gear 321, and the oil pump gear 321 meshes with the second transition gear 44. In this way, when the motorcycle engine 100 is working, the crankshaft can sequentially drive the oil pump gear 321 to rotate through the driving gear 41, the first transition gear 42 and the second transition gear 44, and finally achieve the purpose of driving the second oil pump 32 and the first oil pump 31 to work.

[0058] like Figure 3 , Figure 4As shown, in some embodiments, the motorcycle engine 100 further includes a clutch 50, and the clutch 50 is formed with a clutch chamber 501 inwardly, and the clutch chamber 501 is connected to the first oil return chamber 301; wherein, the clutch chamber 501 is not connected to the gearbox chamber 101. That is to say, the motorcycle engine 100 of this embodiment isolates the clutch chamber from the gearbox chamber 101, so that the clutch 50 and the gearbox 10 can be independent of each other and do not affect each other. Even if one of the clutch 50 and the gearbox 10 fails, the other will not be affected, which can reduce the subsequent maintenance cost and improve the reliability of the motorcycle engine 100.

[0059] It can be understood that the speed change gear set 11 is drivingly connected with the input shaft 12, and the input shaft 12 passes through the gearbox 10 and extends into the clutch chamber 501; wherein, a lubricating oil passage 110 is provided on the gearbox 10, and an oil inlet passage 121 is provided in the input shaft 12, and the lubricating oil passage 110 is communicated with the clutch chamber 501 through the oil inlet passage 121, and is used to introduce engine oil into the clutch 50, so that lubrication and cooling of the clutch 50 can be achieved when the clutch 50 is working. It should be noted that the lubricating oil passage 110 can be specifically a part of the oil passage on the gearbox 10 for introducing engine oil into the gearbox 10, and can be specifically arranged on the gearbox 10 according to the use requirement of the lubricating oil passage 110 being connected with the oil inlet passage 121 on the input shaft 12, and will not be elaborated here.

[0060] It should be noted that a bearing 14 and a bearing flange 15 are installed between the input shaft 12 and the housing 13 of the gearbox 10, so that the input shaft 12 can rotate relative to the housing 13 and input power to the speed gear set 11. In order to prevent the gearbox chamber 101 and the clutch chamber 501 from being connected to each other, an oil seal 151 can be installed between the bearing flange 15 and the housing 13.

[0061] like Figure 2As shown, in some embodiments, the motorcycle engine 100 further includes a shift mechanism 60, which is arranged on a side of the gearbox 10 away from the clutch 50 and is in transmission connection with the speed gear set 11. That is, the shift mechanism 60 and the clutch 50 of this embodiment are arranged on both sides of the gearbox 10, so that when the motorcycle engine 100 is assembled into a motorcycle (not shown), the shift pedal (not shown) on the motorcycle and the shift lever 61 on the shift mechanism 60 are arranged on the same side. This is because for those skilled in the art, the shift pedal of the motorcycle is specifically arranged on the left side of the motorcycle along its forward direction, while the clutch 50 on the motorcycle engine 100 is arranged on the right side of the motorcycle along its forward direction. In this way, the length of the shift lever 61 on the shift mechanism 60 can be shortened, and the shift lever 61 is prevented from being arranged through the gearbox 10, which can reduce the volume of the gearbox 10, so that the gearbox 10 can be formed with a concave cavity 102, and the installation space can be increased for the assembly of other parts on the motorcycle.

[0062] like Figure 2 As shown, in some embodiments, the motorcycle engine 100 further includes a shift chamber cover 70, which is detachably connected to the gearbox 10, and the shift chamber cover 70 and the gearbox 10 can enclose a shift chamber 701; wherein the shift mechanism 60 is at least partially accommodated in the shift chamber 701. That is, the motorcycle engine 100 of this embodiment isolates the shift mechanism 60 from the gearbox 10, so that when the shift mechanism 60 is subsequently repaired, it is only necessary to open the shift chamber cover 70 from the gearbox 10, avoiding opening the gearbox 10 as a whole, which can facilitate the subsequent repair of the shift mechanism 60. It should be noted that the upper shift chamber cover 70 and the gearbox 10 can be connected and fixed by bolts and other connecting members.

[0063] In summary, the motorcycle engine 100 of the present application has the gearbox chamber 101 of the gearbox 10, the crankcase chamber 201 of the crankcase 20 and the clutch chamber 501 of the clutch 50 separated and arranged separately, and they are not connected to each other, so that when the motorcycle engine 100 is working, once one of the three fails, it will not affect the other two, which can improve the working reliability of the motorcycle engine 100; and the oil extracted by the first oil pump 31 is directly injected into the speed gear set 11 of the gearbox 10, so that the speed gear set 11 in the gearbox 10 can be fully lubricated and cooled, so that the risk of wear and damage of the speed gear set 11 when the motorcycle engine 100 is working can be reduced, the service life of the gearbox 10 is improved, and the motorcycle engine 100 can be suitable for large-displacement motorcycles.

[0064] In addition, the present application also provides a motorcycle, comprising the motorcycle engine 100 described above.

[0065] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0066] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present invention, and are not intended to limit the present invention. As long as they are within the spirit of the present invention, appropriate changes and modifications to the above embodiments are within the scope of protection claimed by the present invention.

Claims

1. A motorcycle engine, characterized in that: The motorcycle engine (100) comprises: A gearbox (10) is formed with a gearbox chamber (101) inwardly; The crankcase (20) has a crankcase chamber (201) formed inwardly, and the crankcase chamber (201) is not connected to the gearbox chamber (101); The oil pan (30) is formed with a first oil return chamber (301) and a second oil return chamber (302) inwardly, wherein the first oil return chamber (301) is communicated with the crankcase chamber (201) and is used to collect the oil falling from the crankcase (20), and the second oil return chamber (302) is communicated with the gearbox chamber (101) and is used to collect the oil falling from the gearbox (10); Oil cooler (310); The oil pan (30) is provided with a first oil pump (31) and a second oil pump (32); the first oil pump (31) is arranged in the area where the first oil return chamber (301) is located, and the first oil pump (31) can draw oil from the first oil return chamber (301) and spray it toward the speed gear set (11) of the gearbox (10); the second oil pump (32) is arranged in the area where the second oil return chamber (302) is located, and the second oil pump (32) can draw oil from the second oil return chamber (302) and discharge it toward the oil cooler (310).

2. The motorcycle engine according to claim 1, characterized in that: The oil pan (30) is connected to and communicates with the gearbox (10), and the second oil pump (32) is partially accommodated in the gearbox chamber (101).

3. The motorcycle engine according to claim 1, characterized in that: The crankcase (20) is provided with an oil return passage, and the crankcase chamber (201) can be communicated with the first oil return chamber (301) through the oil return passage; The first oil pump (31) is provided with an oil injection port (311), and the first oil pump (31) can inject oil toward the speed gear set (11) through the oil injection port (311), wherein a flow area of ​​the oil injection port (311) is greater than a flow area of ​​the oil return channel.

4. The motorcycle engine according to claim 1, characterized in that: The motorcycle engine (100) further comprises a transmission gear set (40), and the second oil pump (32) can be connected to the crankshaft in the crankcase (20) through the transmission gear set (40); Wherein, the second oil pump (32) is transmission-connected to the first oil pump (31).

5. The motorcycle engine according to claim 4, characterized in that: The transmission gear set (40) comprises a driving gear (41), a first transition gear (42), a transmission shaft (43) and a second transition gear (44); the driving gear (41) is respectively connected to the speed change gear set (11) and the first transition gear (42); the transmission shaft (43) can pass through the housing (13) of the gearbox (10) and is respectively connected to the first transition gear (42) and the second transition gear (44); The second oil pump (32) has an oil pump gear (321), and the oil pump gear (321) is meshed with the second transition gear (44).

6. The motorcycle engine according to claim 1, characterized in that: The motorcycle engine (100) further comprises a clutch (50), wherein the clutch (50) is formed with a clutch chamber (501) inwardly, and the clutch chamber (501) is communicated with the first oil return chamber (301); Wherein, the clutch chamber (501) is not connected to the transmission chamber (101).

7. The motorcycle engine according to claim 6, characterized in that: The speed change gear set (11) is drivingly connected to an input shaft (12), and the input shaft (12) passes through the gearbox (10) and extends into the clutch chamber (501); The gearbox (10) is provided with a lubricating oil passage (110), the input shaft (12) is provided with an oil inlet passage (121), and the lubricating oil passage (110) is connected to the clutch chamber (501) through the oil inlet passage (121) for introducing engine oil into the clutch (50).

8. The motorcycle engine according to claim 1, characterized in that: The motorcycle engine (100) further comprises a clutch (50) and a shift mechanism (60); the shift mechanism (60) is arranged on a side of the gearbox (10) away from the clutch (50) and is transmission-connected to the speed change gear set (11).

9. The motorcycle engine according to claim 8, characterized in that: The motorcycle engine (100) further comprises a shift chamber cover (70), wherein the shift chamber cover (70) is detachably connected to the gearbox (10), and a shift chamber (701) can be enclosed between the shift chamber cover (70) and the gearbox (10); Wherein, the shift mechanism (60) is at least partially accommodated in the shift chamber (701).

10. A motorcycle, characterized in that: It comprises the motorcycle engine (100) as claimed in any one of claims 1 to 9.

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