Engine and motorcycle

Abstract

The engine and motorcycle provided by the embodiment of the application comprise an output shaft, a crankshaft arranged in front of the output shaft, a secondary shaft located above a line connecting the center of the crankshaft and the center of the output shaft, a shift shaft located below the line connecting the center of the crankshaft and the center of the output shaft, and a shift trend sensor located behind the shift shaft, wherein the center of the crankshaft, the center of the secondary shaft and the center of the output shaft are connected to form a triangle. The shift trend sensor is located below the engine and arranged behind the shift shaft, the shift shaft can effectively block foreign matters and mud splashed from the front of the vehicle, ensure the sensing performance of the shift trend sensor, and avoid damage of the shift trend sensor caused by splashed stones or other articles.

Description

Technical Field

[0001] This invention relates to the technical field of motorcycles, and in particular to an engine and a motorcycle. Background Technology

[0002] Motorcycles include two-wheeled or three-wheeled vehicles, powered by electric, gasoline, or hybrid power. They are lightweight, agile, and fast, and are widely used for patrolling, passenger and freight transport, and also as sports equipment. Broadly speaking, motorcycles are divided into street bikes, road racing motorcycles, off-road motorcycles, cruisers, and touring motorcycles.

[0003] In the existing technology, the motorcycle engine shift trend sensor is located below the engine and exposed on the outside of the engine. When the vehicle is in motion, it is easily affected by the adhesion of mud, water and other debris, which affects the sensor's sensing performance. At the same time, it is also damaged by the impact of flying stones, which is not conducive to the normal use of the sensor. Summary of the Invention

[0004] To address the aforementioned problems, the present invention aims to provide an engine that solves the technical problem that shift trend sensors in the prior art are susceptible to external influences.

[0005] To solve the above-mentioned technical problems, the embodiments of the present invention adopt the following technical solutions:

[0006] An embodiment of the present invention provides an engine, the engine comprising:

[0007] Output shaft;

[0008] A crankshaft located in front of the output shaft;

[0009] A secondary shaft, located above the line connecting the center of the crankshaft and the center of the output shaft;

[0010] A shift shaft, located below the line connecting the center of the crankshaft and the center of the output shaft;

[0011] A shift trend sensor is located behind the shift shaft;

[0012] The center of the crankshaft, the center of the subshaft, and the center of the output shaft form a triangle when connected by lines.

[0013] In some embodiments of this application, the engine further includes:

[0014] A shift connecting rod is located on the outside of the shift trend sensor.

[0015] In some embodiments of this application, the cable of the shift trend sensor is arranged upward along the gap between the magneto cover and the sprocket cover of the engine housing and is close to the housing.

[0016] In some embodiments of this application, the engine further includes:

[0017] A balance shaft is located in front of the crankshaft.

[0018] In some embodiments of this application, the engine further includes:

[0019] A water pump is located in front of the balance shaft, and the line connecting the center of the water pump and the center of the secondary shaft is located above the crankshaft.

[0020] In some embodiments of this application, the engine further includes:

[0021] An oil pump is located at the rear lower part of the crankshaft.

[0022] In some embodiments of this application, the engine includes:

[0023] A first gear is mounted on the crankshaft;

[0024] The second gear meshes with the first gear and is mounted on the balance shaft.

[0025] The third gear meshes with the first gear and is mounted on the countershaft;

[0026] The crankshaft drives the balance shaft through the first gear and the second gear, and the crankshaft drives the countershaft through the first gear and the third gear.

[0027] In some embodiments of this application, the engine includes:

[0028] The first sprocket is mounted on the crankshaft;

[0029] The second sprocket, connected to the first sprocket via a chain, is used to be mounted on the camshaft;

[0030] The fourth gear is mounted on the balance shaft and is located to the right of the second gear;

[0031] The fifth gear meshes with the fourth gear and is mounted on the water pump, used by the balance shaft to drive the water pump through the fourth gear;

[0032] The balance shaft is located at the front of the engine.

[0033] In some embodiments of this application, the engine includes:

[0034] The sixth gear is mounted on the crankshaft;

[0035] The seventh gear meshes with the sixth gear and is mounted on the oil pump;

[0036] The crankshaft drives the oil pump via the sixth gear and the seventh gear.

[0037] The present invention also provides a motorcycle comprising an engine as described above.

[0038] Compared with the prior art, the beneficial effects of the embodiments of the present invention are as follows:

[0039] An embodiment of the present invention provides an engine comprising: an output shaft; a crankshaft, the crankshaft and the output shaft being arranged front and rear; a countershaft, the countershaft being located above the line connecting the center of the crankshaft and the center of the output shaft; a shift shaft, the shift shaft being located below the line connecting the center of the crankshaft and the center of the output shaft; and a shift trend sensor, the shift trend sensor being located behind the shift shaft, wherein the center of the crankshaft, the center of the countershaft, and the center of the output shaft form a triangle when connected by lines. Compared to existing technologies, because the centers of the countershaft and the output shaft form a triangle, with the centers of the crankshaft, countershaft, and output shaft as the three vertices of this triangle, the countershaft is not aligned with the crankshaft and output shaft. This effectively shortens the distance between the crankshaft and output shaft, reducing the space required for the engine to be on the same straight line. This results in a more compact and lightweight engine, contributing to the lightweight and compact design of motorcycles. Furthermore, the shift trend sensor is located below the engine and behind the shift shaft. The shift shaft effectively blocks foreign objects and mud from the front of the vehicle, ensuring the sensor's sensing performance and preventing damage from flying stones or other objects. Embodiments of this invention also provide a motorcycle that, by employing the engine described above, effectively solves the technical problem of the shift trend sensor being susceptible to external influences in existing technologies. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0041] Figure 1 This is a first structural schematic diagram of an engine provided in an embodiment of the present invention;

[0042] Figure 2 This is a schematic diagram of the second structure of an engine provided in an embodiment of the present invention;

[0043] Figure 3 This is a schematic diagram of the third structure of an engine provided in an embodiment of the present invention;

[0044] Figure 4 This is a schematic diagram of the fourth structure of an engine provided in an embodiment of the present invention;

[0045] Figure 5 This is a fifth structural schematic diagram of an engine provided in an embodiment of the present invention;

[0046] Figure 6 This is a sixth structural schematic diagram of an engine provided in an embodiment of the present invention;

[0047] Figure 7 This is a seventh structural schematic diagram of an engine provided in an embodiment of the present invention;

[0048] Figure 8 This is an eighth structural schematic diagram of an engine provided in an embodiment of the present invention.

[0049] in:

[0050] 100, Output shaft; 200, Crankshaft; 300, Countershaft; 400, Shift shaft; 402, Shift trend sensor; 403, Shift connecting rod; 500, Balance shaft; 600, Water pump; 700, Oil pump; 101, First gear; 102, First sprocket; 103, Sixth gear; 201, Second gear; 202, Fourth gear; 301, Third gear; 401, Fifth gear; 501, Seventh gear. Detailed Implementation

[0051] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0052] In the description of the embodiments of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0053] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a replaceable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0054] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0055] like Figure 1-8 As shown, Figure 1 This is a schematic diagram of the structure of an engine provided in an embodiment of the present invention;

[0056] This embodiment provides an engine, the engine comprising:

[0057] Output shaft 100;

[0058] A crankshaft 200, wherein the crankshaft 200 and the output shaft 100 are arranged one behind the other; and

[0059] A secondary shaft 300 is located above the line connecting the center of the crankshaft 200 and the center of the output shaft 100.

[0060] A shift shaft 400 is located below the line connecting the center of the crankshaft 200 and the center of the output shaft 100.

[0061] A shift trend sensor 402 is located behind the shift shaft 400;

[0062] The center of the crankshaft 200, the center of the countershaft 300, and the center of the output shaft 100 form a triangle when connected by lines.

[0063] Since the subshaft 300 is located above the line connecting the center of the crankshaft 200 and the center of the output shaft 100, more space can be reserved for the shift assembly, so that the shift shaft 400 can be located below the line connecting the center of the crankshaft 200 and the center of the output shaft 100, and the shift trend sensor 402 is located behind the shift shaft 400.

[0064] In this embodiment, the engine has a triangular connection formed by the center of the countershaft 300 and the center of the output shaft 100. This means the center of the crankshaft 200, the center of the countershaft 300, and the center of the output shaft 100 are the three vertices of the triangle. This design prevents the countershaft 300 from being on the same straight line as the crankshaft 200 and the output shaft 100, effectively shortening the distance between them. This reduces the width space required for the engine to be on the same straight line, resulting in better compactness and lighter weight. Furthermore, the shift trend sensor 402 is located below the engine and behind the shift shaft 400. The shift shaft 400 effectively blocks foreign objects and mud from the front of the vehicle, ensuring the sensor's sensing performance and preventing damage from flying stones or other objects.

[0065] In some embodiments of this application, the engine further includes:

[0066] A shift connecting rod 403 is disposed on the outside of the shift trend sensor 402.

[0067] The shift shaft 400 can block foreign objects and mud from flying in front of the vehicle, while the shift connecting rod 403 can block foreign objects and mud from flying in from the side of the vehicle, protecting the shift trend sensor 402 from external influences.

[0068] In some embodiments of this application, the shift trend sensor 402 needs to be connected to various structures via cables. In order to avoid the cables being greatly affected by external factors, the cables are arranged upward along the gap between the magneto cover and the sprocket cover of the engine housing and are close to the housing.

[0069] In the existing motorcycle industry, functional improvements have reached a certain bottleneck. The lightweight and agile nature of motorcycles also places certain demands on their weight and size, leading to a need for lighter and more compact designs. The engine provided in this embodiment addresses this need by forming a triangle with the centers of the crankshaft 200, the countershaft 300, and the output shaft 100, thus improving the engine's compactness and lightness, and promoting a lighter and more compact motorcycle design.

[0070] The crankshaft 200 is connected to the connecting rod, and the crankshaft 200 is connected to the countershaft 300 through a gear to transmit power to the countershaft 300. The countershaft 300 is used for transmission and speed change.

[0071] The secondary shaft 300 is connected to the output shaft 100 via gears. The secondary shaft 300 is used to drive the output shaft 100 to rotate, and the output shaft 100 drives the rear wheels to rotate so that the vehicle can move.

[0072] In some embodiments of this application, the line connecting the center of the crankshaft 200 and the center of the output shaft 100 is set at a preset angle to the horizontal plane.

[0073] The preset angle can be 2-60 degrees. By setting the preset angle, the crankshaft 200 and the output shaft 100 can be made more compact, thereby reducing the engine height. In addition, the countershaft 300 is located above the line connecting the center of the crankshaft 200 and the center of the output shaft 100, thereby effectively reducing the size of the engine in terms of length and height.

[0074] In some embodiments of this application, the engine further includes:

[0075] Balance shaft 500, which is located in front of crankshaft 200.

[0076] Since no other mechanism can be arranged in front of the crankshaft 200, placing the balance shaft 500 in front of the crankshaft 200 has no impact on the overall size of the engine and can further improve the compactness of the engine.

[0077] The crankshaft 200 is connected to the balance shaft 500 via gears and drives the balance shaft 500, which is used to reduce vibration of the power machinery.

[0078] In some embodiments of this application, the engine further includes:

[0079] A water pump 600 is located in front of the balance shaft 500, and the line connecting the center of the water pump 600 and the center of the secondary shaft 300 is located above the crankshaft 200.

[0080] The water pump 600 is used to drive the coolant to cool the engine; the water pump 600 is located in front of the balance shaft 500, which advantageously shortens the total design length of the coolant pipeline, enables direct cooling of the engine, saves pipeline material, reduces pipeline size while achieving compactness, and improves the engine's water cooling performance and emissions.

[0081] In some embodiments of this application, the engine further includes:

[0082] Oil pump 700, which is located below and behind crankshaft 200.

[0083] The oil pump 700 is closest to the filter and oil supply points (crankshaft 200 and balance shaft 500), requiring a short delivery pipeline. This not only makes the engine more compact but also improves the lubrication effect of the crankshaft 200 and balance shaft 500 within the engine.

[0084] The oil pump 700 is located at the rear lower part of the crankshaft 200. Since the countershaft 300 is located above the line connecting the center of the crankshaft 200 and the center of the output shaft 100, the oil pump 700 will not obstruct the arrangement of the primary gear on the countershaft 300, thus not increasing the width of the engine, thereby achieving engine compactness.

[0085] The crankshaft 200 drives the blades of the oil pump 700, thereby enabling the crankshaft 200 to drive the oil pump 700 to work.

[0086] In some embodiments of this application, the engine further includes:

[0087] The first housing, wherein the output shaft 100, the crankshaft 200, the countershaft 300 and the oil pump 700 are all mounted on the first housing;

[0088] The second box is connected to the first box by multiple bolts to achieve a combined enclosure.

[0089] The first housing and the second housing are fastened together with multiple bolts to form an engine, thereby enabling the output shaft 100, the crankshaft 200, the countershaft 300, and the oil pump 700 to be installed inside the engine after the housing is assembled.

[0090] In some embodiments of this application, the engine further includes:

[0091] The crankshaft 200 is rotatably mounted on the bearing housing via a bearing, wherein a housing bolt passes through the bearing housing.

[0092] The bearing housing is installed inside the first housing, and the crankshaft 200 is rotatably mounted on the bearing housing via a bearing, thereby enabling the crankshaft 200 to rotate.

[0093] Among the studs of the housing, one bolt passes through the bearing housing for installation.

[0094] In some embodiments of this application, the oil pump 700 is located immediately adjacent to the bolts passing through the housing of the bearing housing.

[0095] The oil pump 700 is located close to the bolts of the bearing housing, which makes the oil pump 700's inlet passage shorter and enables efficient oil supply.

[0096] In some embodiments of this application, the engine includes:

[0097] The first gear 101 is mounted on the crankshaft 200;

[0098] The second gear 201 meshes with the first gear 101 and is mounted on the balance shaft 500.

[0099] The third gear 301 meshes with the first gear 101 and is mounted on the countershaft 300.

[0100] The crankshaft 200 drives the balance shaft 500 through the first gear 101 and the second gear 201, and the crankshaft 200 drives the countershaft 300 through the first gear 101 and the third gear 301.

[0101] The power from the crankshaft 200 drives the countershaft 300 via the first gear 101 and the third gear 301. The countershaft 300 then transmits the power to the engine output shaft 100, driving the vehicle. In this embodiment, the transmission system eliminates the dedicated gear on the crankshaft 200 for transmission with the balance shaft 500. Power is transmitted from the first gear 101 to the balance shaft 500 via the second gear 201 and from the third gear 301 to the countershaft 300. This allows the engine to be more compact in width, retracting inwards from the left side, reducing the engine's space requirements and improving its compactness and lightweight design. This provides a better driving experience and achieves lightweighting, benefiting vehicle handling, power, economy, and emissions performance. It effectively solves the technical problem in related technologies where the gear set connecting the crankshaft 200 and the balance shaft 500 is located on one side of the engine, while the other gear set connecting the crankshaft 200 and the countershaft 300 is located on the other side, increasing the overall width of the engine and reducing its compactness.

[0102] The first gear 101 is mounted on the crankshaft 200 by welding or spline connection, the second gear 201 is mounted on the balance shaft 500 by welding or spline connection, and the third gear 301 is mounted on the countershaft 300 by welding or spline connection.

[0103] The crank-connecting rod mechanism, which converts the reciprocating motion of the piston into rotational motion, outputs rotational power through the crankshaft 200. The first gear 101, the second gear 201, and the third gear 301 are coplanar to form the first layer of transmission pairs, all located on the right side of the engine, that is, on the right side of the crankshaft 200, the countershaft 300, and the balance shaft 500. The countershaft 300 has a clutch located in the middle and on the left side. By placing the transmission of the first gear 101, the second gear 201, and the third gear 301 on the right side of the clutch, the additional space required for the clutch is not needed due to the need to assemble the gear pairs. This effectively minimizes the height of the clutch side, further improving the compactness and lightweight of the engine.

[0104] In some embodiments of this application, the engine includes:

[0105] The first sprocket 102 is mounted on the crankshaft 200;

[0106] The second sprocket is connected to the first sprocket 102 via a chain and is used to be mounted on the camshaft;

[0107] The fourth gear 202 is mounted on the balance shaft 500 and is located to the right of the second gear 201;

[0108] The fifth gear 401 meshes with the fourth gear 202 and is mounted on the water pump 600, so that the balance shaft 500 can drive the water pump 600 to work through the fourth gear 202.

[0109] The balance shaft 500 is located at the front of the engine.

[0110] The first sprocket 102 is mounted on the crankshaft 200 by welding or spline connection; the crankshaft 200 drives the first sprocket 102 to rotate. The second sprocket is mounted on the camshaft by welding or spline connection. The first sprocket 102 and the second sprocket are driven by a chain. The first sprocket 102 is located at the position of the first gear 101. The chain cavity is slightly outward, but it does not affect the human-machine interface. It can be set at the position above the right side of the countershaft 300, which can effectively improve the compactness of the engine.

[0111] The fourth gear 202 is mounted on the balance shaft 500 by welding or spline connection and rotates with the balance shaft 500; the fifth gear 401 is mounted on the rotating shaft of the water pump 600 by welding or spline connection and is used to drive the impeller of the water pump 600 to rotate. The fourth gear 202 is located to the right of the second gear 201. The balance shaft 500 is placed at the front of the engine. The fourth gear 202, which is arranged at the upper right end of the balance shaft 500, drives the fifth gear 401 to drive the water pump 600 to work.

[0112] The first sprocket 102, the fourth gear 202, and the fifth gear 401 are all located within a preset range, that is, the first sprocket 102, the fourth gear 202, and the fifth gear 401 will not interfere with each other in height. They can be set within the preset range so that the first sprocket 102, the fourth gear 202, and the fifth gear 401 form a second layer, wherein the second layer is adjacent to the first layer mentioned above.

[0113] In some embodiments of this application, the engine includes:

[0114] The sixth gear 103 is mounted on the crankshaft 200;

[0115] The seventh gear 501 meshes with the sixth gear 103 and is mounted on the oil pump 700;

[0116] The crankshaft 200 drives the oil pump 700 through the sixth gear 103 and the seventh gear 501.

[0117] The sixth gear 103 is mounted on the crankshaft 200 by welding or spline connection, and rotates with the crankshaft 200. The seventh gear 501 is mounted on the oil pump shaft by welding or spline connection, and is used to drive the oil pump shaft to rotate, thereby driving the oil pump to work. The seventh gear 501 is mounted on the outermost side of the crankshaft 200, located inside the skirt of the oil pump, so as not to increase the height of the engine. It can more rationally configure the positions of the oil pump and the sixth gear 103 and the seventh gear 501 that drive the oil pump. Since it is not necessary to arrange the oil pump 700 and water pump 600 behind the crankshaft 200, the distance from the crankshaft 200 to the countershaft 300 is shortened, and the engine is more compact in the front-rear direction. The sixth gear 103 and the seventh gear 501 form a third layer.

[0118] The present invention also provides a motorcycle, the motorcycle including the engine as described above;

[0119] By employing the engine described above, the motorcycle effectively solves the technical problem in the prior art where the shift trend sensor 402 is susceptible to external influences.

[0120] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An engine, characterized in that, The engine includes: Output shaft; A crankshaft located in front of the output shaft; A secondary shaft, located above the line connecting the center of the crankshaft and the center of the output shaft; A shift shaft, located below the line connecting the center of the crankshaft and the center of the output shaft; A shift trend sensor is located behind the shift shaft; The center of the crankshaft, the center of the sub-shaft, and the center of the output shaft form a triangle when connected by lines. The cable of the shift trend sensor is arranged close to the engine compartment; A balance shaft is located in front of the crankshaft; A water pump is located in front of the balance shaft, and the line connecting the center of the water pump and the center of the secondary shaft is located above the crankshaft. An oil pump, the oil pump being located at the rear lower part of the crankshaft; A first gear is mounted on the crankshaft; The second gear meshes with the first gear and is mounted on the balance shaft. The third gear meshes with the first gear and is mounted on the countershaft; The crankshaft drives the balance shaft through the first gear and the second gear, and the crankshaft drives the countershaft through the first gear and the third gear; The first sprocket is mounted on the crankshaft; The second sprocket, connected to the first sprocket via a chain, is used to be mounted on the camshaft; The fourth gear is mounted on the balance shaft and is located to the right of the second gear; The fifth gear meshes with the fourth gear and is mounted on the water pump, used by the balance shaft to drive the water pump through the fourth gear; The balance shaft is located at the front of the engine; The sixth gear is mounted on the crankshaft; The seventh gear meshes with the sixth gear and is mounted on the oil pump; The crankshaft drives the oil pump via the sixth gear and the seventh gear.

2. The engine according to claim 1, characterized in that, The engine also includes: A shift connecting rod is located on the outside of the shift trend sensor.

3. The engine according to claim 1, characterized in that, The cable of the shift trend sensor is arranged upward along the gap between the magneto cover and the sprocket cover of the engine housing and is close to the housing.

4. A motorcycle, characterized in that, The motorcycle includes: The engine as described in any one of claims 1-3.

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