Engine and motorcycle

Abstract

The utility model relates to an engine and motorcycle, including heat engine parts, transmission parts and transmission parts that connect gradually, the heat engine parts include cylinder head, with cylinder head intercommunication cylinder body, set up in the piston assembly of cylinder body and with the transmission connection of piston assembly crankshaft, the crankshaft is longitudinal arrangement, and its one end is connected with dry clutch, transmission parts include the transmission shaft that connects the dry clutch end of crankshaft is away from, the transmission shaft transmission connection input shaft of transmission parts, the utility model discloses through with the longitudinal arrangement of crankshaft, and directly setting up dry clutch at the crankshaft end, make power transmission path shorten significantly, thereby reduce energy loss, improved power transmission efficiency, simultaneously because power transmission direction all is in the same direction, also make the overall width of engine reduce, and then make its overall structure more compact, and the degree of light weight is higher.

Description

Technical Field

[0001] This utility model relates to the field of engine technology, specifically to an engine and a motorcycle. Background Technology

[0002] Currently, most motorcycle engines employ a transmission structure where the crankshaft and transmission mechanism are integrated. The crankshaft meshes with the input shaft of the transmission mechanism via a gear set, and then the transmission mechanism outputs power to the rear axle. However, in this type of arrangement, the power transmission path is relatively long, and the transmission direction is often parallel to the rear axle shaft, resulting in a large distance between the crankshaft and the output shaft. This not only increases the overall width of the engine and reduces the compactness of the layout, but also leads to energy loss and low transmission efficiency due to the numerous power transmission links. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an engine and a motorcycle to solve the problems of long power transmission path, large energy loss, low transmission efficiency, large overall width, and insufficient compactness and lightweight of the existing motorcycle engine.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An engine includes a heat engine component, a transmission component, and a gearbox component connected in sequence.

[0006] The heat engine component includes a cylinder head, a cylinder block communicating with the cylinder head, a piston assembly disposed in the cylinder block, and a crankshaft that is drivenly connected to the piston assembly. The crankshaft is arranged longitudinally and has a dry clutch connected to one end.

[0007] The transmission component includes a drive shaft connected to one end of the dry clutch away from the crankshaft, and the drive shaft is driven to the input shaft of the transmission component.

[0008] Compared with the prior art, the present invention has the following beneficial effects:

[0009] 1. By arranging the crankshaft longitudinally and directly installing a dry clutch at the crankshaft end, the power transmission path is significantly shortened, thereby reducing energy loss and improving power transmission efficiency. At the same time, since the power transmission direction is in the same direction, the overall width of the engine is reduced, making its overall structure more compact and lighter.

[0010] Furthermore, the transmission shaft is provided with a driving tooth, and the input shaft is provided with a driven tooth, the driving tooth meshing with the driven tooth.

[0011] Furthermore, it also includes a lubrication component, which includes a drive sprocket located at the end of the crankshaft opposite to the dry clutch, an oil pump shaft parallel to the crankshaft, a driven sprocket located on the oil pump shaft, and an oil pump. The drive sprocket is connected to the driven sprocket via a chain drive.

[0012] Furthermore, a water pump shaft is provided at one end of the oil pump shaft opposite to the oil pump, and a water pump impeller is provided on the water pump shaft.

[0013] Furthermore, the dry clutch includes a flywheel, a gear ring disposed on the outer edge of the flywheel, a clutch pressure plate disposed on one end face of the flywheel, and a flange disposed on the other end face of the flywheel. The flange is coaxially disposed with the crankshaft and is provided with a spline hole for connecting the crankshaft.

[0014] Furthermore, it also includes a plurality of heat sinks, which are spaced apart along the circumferential direction of the flywheel on the side of the flywheel facing away from the clutch pressure plate.

[0015] Furthermore, the heat sink has an arc-shaped cross-section.

[0016] Furthermore, an oil seal is provided on the side of the crankshaft near the flange.

[0017] Furthermore, bearings are fitted onto the crankshaft, drive shaft, and input shaft.

[0018] This utility model also provides a motorcycle, including the engine described above. Attached Figure Description

[0019] Appendix Figure 1 : A three-dimensional structural diagram of the engine in this embodiment;

[0020] Appendix Figure 2 Appendix Figure 1 A top-view structural diagram;

[0021] Appendix Figure 3 : A schematic diagram of the dry clutch in the engine of this embodiment;

[0022] Appendix Figure 4 Appendix Figure 3 A schematic diagram of the exploded structure;

[0023] Explanation of icon numbers:

[0024] 10. Heat engine components; 11. Cylinder head; 12. Cylinder block; 13. Crankshaft;

[0025] 20. Transmission components; 21. Drive shaft; 22. Drive gear;

[0026] 30. Gearbox components; 31. Input shaft; 32. Driven gear;

[0027] 40. Lubrication components; 41. Drive sprocket; 42. Driven sprocket; 43. Oil pump shaft; 44. Oil pump; 45. Chain; 46. Water pump shaft; 47. Water pump impeller;

[0028] 50. Dry clutch; 51. Flywheel; 511. Mounting hole; 52. Gear ring; 53. Clutch pressure plate; 54. Flange; 541. Spline hole; 542. Mounting hole; 55. Heat sink;

[0029] 60. Oil seal;

[0030] 70. Bearings.

[0031] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0032] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the technical solutions of this utility model are further described below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this utility model and are not intended to limit it.

[0033] In the description of this utility model, it should be noted that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are only for illustrative purposes to aid those skilled in the art and to facilitate understanding and reading. They are not intended to limit the implementation conditions of this utility model and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to the size, without affecting the effects and objectives of this utility model, should still fall within the scope of the technical content disclosed in this utility model. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of implementation of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of implementation of this utility model.

[0034] like Figure 1-4As shown in the figure, this utility model embodiment proposes an engine, including a heat engine component 10, a transmission component 20, and a transmission component 30 connected in sequence; the heat engine component 10 includes a cylinder head 11, a cylinder block 12 communicating with the cylinder head 11, a piston assembly disposed in the cylinder block 12, and a crankshaft 13 drivingly connected to the piston assembly, the crankshaft 13 being arranged longitudinally, and a dry clutch 50 being connected to one end of the crankshaft 11; wherein, the intake and exhaust ports of the cylinder head 11 are distributed on its left and right sides; the transmission component 20 includes a drive shaft 21 connected to the dry clutch 50 at the end opposite to the crankshaft 13, the drive shaft 21 drivingly connecting to the input shaft 31 of the transmission component 30.

[0035] In this embodiment of the invention, by arranging the crankshaft 13 longitudinally and directly setting a dry clutch 50 at the end of the crankshaft 13, and connecting the dry clutch 50 to the input shaft 31 of the transmission component 30 via the transmission shaft 21, the transmission path of power output from the crankshaft 13 to the transmission is shortened, reducing intermediate gear meshing links, thereby reducing energy loss and improving transmission efficiency; at the same time, since the power transmission direction is all in the same direction, the overall width of the engine is also reduced, the structure is more compact, and the degree of lightweighting is higher.

[0036] Specifically, such as Figure 1-2 As shown in this embodiment of the invention, the drive shaft 21 is provided with a driving gear 22, and the input shaft 31 is provided with a driven gear 32. The driving gear 22 meshes with the driven gear 32. Through the meshing action of the driving gear 22 and the driven gear 32, power transmission between the drive shaft 21 and the input shaft 31 is realized, thereby enabling the power output from the crankshaft 13 via the dry clutch 50 and the drive shaft 21 to be efficiently transmitted to the transmission component 30. This not only simplifies the transmission path but also ensures the stability and reliability of the transmission.

[0037] It should be noted that both the driving gear 22 and the driven gear 32 in this embodiment are helical gear structures. By using helical gears, compared to spur gear meshing, a greater degree of overlap can be achieved during meshing, resulting in smoother power transmission, reduced transmission noise and vibration, and improved transmission efficiency and load-bearing capacity, thereby further enhancing the overall power performance of the engine. Secondly, the driving gear 22 and the driven gear 32 can be mounted on the drive shaft 21 and input shaft 31 respectively via splines, facilitating disassembly, assembly, and adjustment.

[0038] Based on the above solutions, such as Figure 1-2As shown, it also includes a lubrication component 40, which includes a drive sprocket 41 located at the end of the crankshaft 13 opposite to the dry clutch 50, an oil pump shaft 43 parallel to the crankshaft 13, a driven sprocket 42 located on the oil pump shaft 43, and an oil pump 44. The drive sprocket 41 is connected to the driven sprocket 42 via a chain 45. Furthermore, a water pump shaft 46 is provided at the end of the oil pump shaft 43 opposite to the oil pump 44, and a water pump impeller 47 is provided on the water pump shaft 46.

[0039] In this embodiment, when the crankshaft 13 rotates, the driving sprocket 41 is connected to the driven sprocket 42 via the chain 45, which drives the oil pump 44 to operate, thereby lubricating the crankshaft 13 and related transmission components 20. This ensures that each transmission component 20 receives stable lubrication during engine operation, reduces friction loss, improves power transmission efficiency, and extends the service life of the engine and transmission components 20.

[0040] Secondly, when the oil pump shaft 43 drives the oil pump 44 to operate, the water pump shaft 46 also drives the water pump impeller 47 to rotate, thereby realizing the circulation of water to the engine cooling system and thus simultaneously satisfying the functions of engine lubrication and cooling.

[0041] Specifically, such as Figure 3-4 As shown in this embodiment of the present invention, the dry clutch 50 includes a flywheel 51, a gear ring 52 disposed on the outer edge of the flywheel 51, a clutch pressure plate 53 disposed on one end face of the flywheel 51, and a flange 54 disposed on the other end face of the flywheel 51. The flange 54 is coaxially disposed with the crankshaft 13 and is provided with a spline hole 541 for connecting the crankshaft 13. When the flywheel 51 is connected to the crankshaft 13 through the flange 54, its overall rotational center of mass will move outward, thereby reducing the sway caused by centrifugal force during high-speed rotation, and thus improving the stability and smoothness of the overall transmission.

[0042] It should be noted that the flange 54 in this embodiment is detachably mounted on the flywheel 51. The use of a detachable flange 54 not only avoids directly machining the spline hole 541 on the flywheel 51, reducing manufacturing difficulty and processing costs, but also makes it easier to ensure machining accuracy due to the small size of the flange 54. This improves the assembly accuracy and reliability with the crankshaft 13, and also makes it easy to disassemble and reassemble when maintenance or replacement is needed, thereby reducing maintenance costs and time.

[0043] Specifically, the flange 54 is provided with a plurality of mounting holes 542 along its circumferential direction, and the flywheel 51 is provided with a plurality of fixing holes 511 corresponding one-to-one with the plurality of mounting holes 542 along its circumferential direction. The mounting holes 542 and the fixing holes 511 are connected to allow bolts to pass through and be locked. During assembly, the bolts are sequentially inserted into the mounting holes 542 and the fixing holes 511 and locked with nuts, thereby achieving a reliable fixed connection between the flange 54 and the flywheel 51. This not only ensures the fastening strength between the flange 54 and the flywheel 51, but also facilitates disassembly and maintenance.

[0044] It should be noted that, in this embodiment, the number of mounting holes 542 and fixing holes 511 is not limited to a specific value, and can be three, four, five or more; at the same time, the spacing between several adjacent mounting holes 542 and fixing holes 511 can be the same or different. Preferably, in this embodiment, the spacing between several adjacent mounting holes 542 and fixing holes 511 is the same, so that the flange 54 and flywheel 51 are subjected to more uniform force during installation, further improving the stability of the connection.

[0045] Based on the above solutions, such as Figure 3-4 As shown, it also includes a plurality of heat sinks 55, which are spaced apart along the circumferential direction of the flywheel 51 on the side of the flywheel 51 opposite to the clutch pressure plate 53. When the flywheel 51 rotates at high speed with the crankshaft 13, the plurality of heat sinks 55 on the end face of the flywheel 51 also rotate, and during the rotation, they agitate and flail the surrounding air, thereby forming an airflow near the end face of the flywheel 51. This airflow accelerates the conduction and dissipation of internal heat, improves the heat dissipation efficiency of the dry clutch 50 under long-term working conditions, effectively reduces the temperature rise, and avoids the deterioration of the friction pair performance or damage to components due to overheating. Furthermore, the cross-section of the heat sinks 55 is arc-shaped, that is, the heat sinks 55 are spiral-shaped, so that when the flywheel 51 rotates at high speed, the heat sinks 55 can guide the air, so that the airflow forms a certain spiral airflow, thereby enhancing the air convection heat transfer effect and further improving the heat dissipation efficiency.

[0046] It is worth mentioning that, in this embodiment, several heat sinks 55 are integrally formed on the flywheel 51, that is, the heat sinks 55 and the flywheel 51 are formed into an integral structure through integral casting or machining. Through integral forming, no additional fasteners are needed between the heat sinks 55 and the flywheel 51, which not only ensures the stability of the heat sinks 55 when rotating at high speed, simplifies the assembly process, but also improves the heat conduction efficiency.

[0047] Based on the above solutions, such as Figure 1As shown, the crankshaft 13 is provided with an oil seal 60 on the side near the flange 54. By providing the oil seal 60, oil leakage can be effectively prevented, lubrication loss can be reduced, and contamination of the dry clutch 50 and other external parts can be avoided, thereby improving the reliability and durability of engine operation.

[0048] Based on the above solutions, such as Figure 1-2 As shown, bearings 70 are fitted on the crankshaft 13, transmission shaft 21 and input shaft 31. The bearings 70 enhance the radial stability of each shaft, reduce the resistance to shaft rotation, and thus improve the transmission efficiency.

[0049] This utility model also provides a motorcycle, including the engine described above; wherein, the specific structure of the engine is as described in the above embodiments, and since this motorcycle adopts all the technical solutions of the above engine, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An engine, characterized in that, It includes a heat engine component (10), a transmission component (20), and a gearbox component (30) connected in sequence; The heat engine component (10) includes a cylinder head (11), a cylinder body (12) communicating with the cylinder head (11), a piston assembly disposed in the cylinder body (12), and a crankshaft (13) drivingly connected to the piston assembly. The crankshaft (13) is arranged longitudinally and a dry clutch (50) is connected to one end of it. The transmission component (20) includes a drive shaft (21) connected to one end of the dry clutch (50) away from the crankshaft (13), and the drive shaft (21) is connected to the input shaft (31) of the transmission component (30).

2. The engine according to claim 1, characterized in that, The drive shaft (21) is provided with a driving tooth (22), and the input shaft (31) is provided with a driven tooth (32). The driving tooth (22) meshes with the driven tooth (32).

3. An engine according to claim 1, characterized in that, It also includes a lubrication component (40), which includes a drive sprocket (41) located on the crankshaft (13) away from the dry clutch (50), an oil pump shaft (43) parallel to the crankshaft (13), a driven sprocket (42) located on the oil pump shaft (43), and an oil pump (44). The drive sprocket (41) is connected to the driven sprocket (42) via a chain (45).

4. An engine according to claim 3, characterized in that, The oil pump shaft (43) is provided with a water pump shaft (46) at one end away from the oil pump (44), and a water pump impeller (47) is provided on the water pump shaft (46).

5. An engine according to claim 1, characterized in that, The dry clutch (50) includes a flywheel (51), a gear ring (52) disposed on the outer edge of the flywheel (51), a clutch pressure plate (53) disposed on one end face of the flywheel (51), and a flange (54) disposed on the other end face of the flywheel (51). The flange (54) is coaxially disposed with the crankshaft (13) and is provided with a spline hole (541) for connecting the crankshaft (13).

6. An engine according to claim 5, characterized in that, It also includes a plurality of heat sinks (55), which are spaced apart along the circumferential direction of the flywheel (51) on the side of the flywheel (51) away from the clutch pressure plate (53).

7. An engine according to claim 6, characterized in that, The heat sink (55) has an arc-shaped cross-section.

8. An engine according to claim 5, characterized in that, The crankshaft (13) is provided with an oil seal (60) on the side near the flange (54).

9. An engine according to claim 1, characterized in that, Bearings (70) are fitted on the crankshaft (13), drive shaft (21) and input shaft (31).

10. A motorcycle, characterized in that, Includes an engine as described in any one of claims 1-9.

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