Engine and motorcycle

Abstract

The embodiment of the present application provides an engine and a motorcycle, the engine comprising: a cylinder body, the cylinder body having a cooling channel; a water pump, the water pump being in communication with the cooling channel, the water pump being located at the front of the axis of the cylinder body; a radiator, the radiator being located at the front of the axis of the cylinder body, the radiator being in communication with the water pump; and a thermostat, the thermostat being located at the front of the axis of the cylinder body, the thermostat being in communication with the radiator and the cooling channel; the water pump is located at the right side of the cylinder body, and the thermostat is located at the left side of the cylinder body; the technical problem that the total length of the water passage is increased due to the water pump being arranged at the rear side of the axis of the cylinder body in the related art is effectively solved.

Description

Technical Field

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

[0002] Motorcycles are two- or three-wheeled vehicles powered by electric, gasoline, or hybrid power. They are lightweight, flexible, and fast, and are widely used for patrol, passenger and freight transportation, and as sports equipment. Generally speaking, motorcycles are categorized as street bikes, road racing bikes, off-road bikes, cruisers, and touring bikes.

[0003] At present, as the demand for entertainment functions of motorcycle products becomes a trend, the demand for lightweight and compact engines is becoming more and more obvious; the coolant of the motorcycle engine is sucked in by a water pump, then pressurized by the water pump, and introduced into each channel. Under the action of the water pump, it is sent to the cylinder block and the cylinder body to cool the cylinder block and the cylinder body. In the related technology, since the water pump is arranged on the rear side of the cylinder axis, the total length of the water channel is increased. Technical problem. Summary of the Invention

[0004] In order to solve the above problems, the purpose of the present invention is to provide an engine for solving the technical problem in the related art that the total length of the water passage increases due to the water pump being arranged on the rear side of the cylinder axis.

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

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

[0007] a cylinder body having a cooling passage;

[0008] a water pump, the water pump being in communication with the cooling channel and being located in front of the axis of the cylinder body;

[0009] a radiator, the radiator being located in front of the axis of the cylinder block and being in communication with the water pump; and

[0010] a thermostat, the thermostat being located in front of the axis of the cylinder body and communicating with the radiator and the cooling channel;

[0011] The water pump is located on the right side of the cylinder body, and the thermostat is located on the left side of the cylinder body. In some embodiments of the present application, the engine further includes:

[0012] The piston is arranged on the cylinder body, and the water pump is located in front of the axis of the piston.

[0013] In some embodiments of the present application, the engine further comprises:

[0014] A circulation pipeline, one end of which is connected to the radiator, and the other end of which is connected to the cooling channel.

[0015] In some embodiments of the present application, on a vertical projection plane, the circulation pipeline crosses the left and right side surfaces of the cylinder body to form a mouth-shaped closed-loop water channel.

[0016] In some embodiments of the present application, the engine further comprises:

[0017] A water inlet pipe, wherein a first end of the water inlet pipe is connected to the thermostat, and a second end of the water inlet pipe is connected to the radiator, wherein the water inlet pipe is located at the front of the cylinder body.

[0018] In some embodiments of the present application, the engine further comprises:

[0019] A water outlet pipe is connected to the radiator and the water pump, wherein the water outlet pipe is located at the front of the cylinder body.

[0020] In some embodiments of the present application, further comprising:

[0021] A connecting pipe, wherein a first end of the connecting pipe is connected to a first end of the water outlet pipe, a second end of the connecting pipe is connected to the water pump, and the connecting pipe is located at the front of the cylinder body.

[0022] In some embodiments of the present application, the engine further comprises:

[0023] The engine further comprises:

[0024] a box body, the box body being connected to the cylinder body, and the water pump being located at the front of the box body;

[0025] a clutch, the clutch being mounted in the housing;

[0026] a crankshaft, the crankshaft being mounted in the housing; and

[0027] a water pump, wherein the water pump and the clutch are arranged on the right side of the engine, and the water pump is located on the front side of the housing;

[0028] Wherein, a line connecting the center of the water pump and the center of the clutch is located above the central axis of the crankshaft.

[0029] In some embodiments of the present application, the difference between the distance between the center of the water pump and the center of the crankshaft and the distance between the center of the clutch and the center of the crankshaft is within a preset range, and the preset range is;

[0030] In some embodiments of the present application, the engine further comprises:

[0031] A cylinder body, the cylinder body is connected to the box body, the water pump is connected to the box body and the cylinder body, the water pump is located in front of the axis of the cylinder body, and the water pump is close to the outer surface of the cylinder body;

[0032] a balancing shaft, the balancing shaft being rotatably mounted in the housing;

[0033] a countershaft, the countershaft being rotatably mounted in the housing;

[0034] Wherein, the crankshaft is connected to the balance shaft and the countershaft respectively through a gear assembly, so as to transmit power to the balance shaft and the countershaft;

[0035] An output shaft, the output shaft being mounted in the housing, wherein the crankshaft, the countershaft, and the output shaft are arranged in a triangle;

[0036] The crankshaft and the output shaft are arranged front to back, and the countershaft is arranged above the center line connecting the crankshaft and the output shaft;

[0037] The balance shaft is arranged in front of the crankshaft.

[0038] In some embodiments of the present application, the engine further comprises:

[0039] a water pump body, wherein the water pump body and the clutch are arranged on the right side of the engine, and the water pump is located on the front side of the housing;

[0040] A water pump shaft, the water pump shaft being mounted on the water pump body and being used to drive the impeller on the water pump body to rotate;

[0041] a first gear mounted on the water pump shaft;

[0042] A second gear is mounted on the balance shaft, and the second gear is meshed with the first gear;

[0043] A driven gear is further provided on the balance shaft, and a driving gear is provided on the crankshaft. The driving gear and the driven gear are meshed with each other, and the second gear is located outside the driven gear.

[0044] An embodiment of the present application further provides a motorcycle, comprising:

[0045] Engine as described above.

[0046] Compared with the prior art, the embodiments of the present invention have the following advantages:

[0047] An embodiment of the present invention provides an engine, which includes a cylinder block, a water pump, a radiator and a thermostat, wherein the water pump, the radiator and the thermostat are all located in front of the axis of the cylinder block, thereby reducing the distance between the two major performance components, the water pump and the thermostat, and the radiator, which greatly shortens the total length of the external pipeline and greatly shortens the total length of the cooling channel, thereby reducing the time and fluid resistance for the coolant to flow from the water pump to the required part of the cylinder block, improving the cooling efficiency of the cylinder block and reducing mechanical losses, and effectively solving the technical problems existing in the related art that the water pump is arranged on the rear side of the cylinder block axis, which leads to an increase in the total length of the water channel, resulting in an increase in the time and fluid resistance for the coolant to flow from the water pump to the required part of the cylinder block, affecting the reduction of cooling efficiency and increasing mechanical losses.

[0048] An embodiment of the present invention provides a motorcycle that uses an engine as described above. The motorcycle effectively solves the technical problems existing in the related art that, due to the arrangement of the water pump on the rear side of the cylinder axis, the total length of the water passage increases, resulting in an increase in the time and fluid resistance for the coolant to flow from the water pump to the required part of the cylinder, which affects the reduction of cooling efficiency and the increase of mechanical losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without any creative work.

[0050] Figure 1 This is a right side view of an engine provided by an embodiment of the present invention;

[0051] Figure 2 It is a left side view of an engine provided by an embodiment of the present invention;

[0052] Figure 3 is a top view of an engine provided by an embodiment of the present invention;

[0053] Figure 4 This is a first structural schematic diagram of an engine provided by an embodiment of the present invention;

[0054] Figure 5 is a second structural schematic diagram of an engine provided by an embodiment of the present invention;

[0055] Figure 6 This is a third structural schematic diagram of an engine provided by an embodiment of the present invention.

[0056] in:

[0057] 100, cylinder block; 200, water pump; 300, radiator; 400, thermostat; 500, circulation line; 600, water inlet pipe; 700, water outlet pipe; 800, connecting pipe; 900, housing; 201, crankshaft; 301, clutch; 501, balance shaft; 601, countershaft. DETAILED DESCRIPTION

[0058] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0059] In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they should not be understood as limiting the embodiments of the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0060] In the description of the embodiments of the present application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, replaceable connections, or integrated connections. They can refer to mechanical connections or electrical connections. They can refer to direct connections or indirect connections through an intermediate medium. They can also refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present application based on the specific circumstances.

[0061] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0062] like Figures 1-6 As shown, Figure 1 A left side view of an engine provided by an embodiment of the present invention;

[0063] This embodiment provides an engine, which includes:

[0064] A cylinder body 100 having a cooling channel;

[0065] a water pump 200 , the water pump 200 being in communication with the cooling channel and being located in front of the axis of the cylinder block 100 ;

[0066] a radiator 300 , the radiator 300 being located in front of the axis of the cylinder block 100 and being in communication with the water pump 200 ; and

[0067] The thermostat 400 is located in front of the axis of the cylinder block 100 , and the thermostat 400 is connected to the radiator 300 and the cooling channel.

[0068] In the engine of this embodiment, the water pump 200, the radiator 300 and the thermostat 400 are all located in front of the axis of the cylinder block 100, thereby reducing the distance between the two major performance components, the water pump 200 and the thermostat 400, and the radiator 300, which is very beneficial in shortening the total length of the external pipeline and greatly shortening the total length of the cooling channel, thereby reducing the time and fluid resistance for the coolant to flow from the water pump 200 to the required part of the cylinder block 100, improving the cooling efficiency of the cylinder block 100 and reducing mechanical losses, and effectively solving the technical problems in the related art that the total length of the water channel will increase due to the need for each channel to be connected around the periphery of the engine to cool the engine with the coolant passing through the channel, resulting in an increase in the time and fluid resistance for the coolant to flow from the water pump 200 to the required part of the cylinder block 100, affecting the reduction in cooling efficiency and increasing mechanical losses.

[0069] In this embodiment, the motorcycle is forward in the forward direction; in the top view of the entire engine, due to the left-right distribution design of the water pump and thermostat, the "external" waterless pipes cross the two sides of the engine and form a "mouth" shaped closed loop water path through the connection with the water channel inside the engine.

[0070] The water pump 200 is connected to the coolant storage tank, and the power transmitted by the crankshaft drives the water pump 200 to work, so that the coolant flows out through the water pump 200 under pressure;

[0071] The cooling channel of the cylinder block 100 is of a built-in type, which is mainly formed by a groove opened inside the cylinder block 100. The coolant pressurized by the water pump 200 flows into the cooling channel. Since the water pump 200 is arranged in the front part of the axis of the cylinder block 100, the position of the water pump 200 and the cooling channel are relatively close, thereby reducing the 800 connecting pipes of the water pump 200, improving the transmission efficiency of the coolant, and avoiding the 800 connecting pipes between the water pump 200 and the cooling channel. When the engine is started, the time and fluid resistance for the coolant to reach the required part will increase, and the coolant has not yet been delivered to the part of the engine that needs to be cooled, the cooling effect is poor, and the mechanical loss problem is increased.

[0072] The thermostat 400 is in communication with the cooling channel, and the liquid in the cooling channel is measured at a corresponding temperature by the thermostat 400 before entering the radiator 300;

[0073] The radiator 300 is used to dissipate heat from the coolant and is connected to the thermostat 400. The coolant enters the radiator 300 for heat dissipation and cooling, and then returns to the water pump 200 for recycling.

[0074] The water pump 200 is located on the right side of the cylinder body 100 , and the thermostat 400 is located on the left side of the cylinder body 100 .

[0075] By arranging the water pump 200 and the thermostat 400 on the left and right sides of the cylinder block 100 respectively, the compactness of the engine is improved on the one hand, and the aesthetics of the engine is improved on the other hand.

[0076] In some embodiments of the present application, the engine further comprises:

[0077] The piston is provided on the cylinder body 100 , and the water pump 200 is located in front of the axis of the piston.

[0078] The piston is movably mounted in the cylinder 100, and the water pump 200 is located in front of the axis of the piston, which can further reduce the distance between the two major performance components, the water pump 200 and the thermostat 400, and the radiator 300, thereby greatly shortening the total length of the external pipeline and greatly shortening the total length of the cooling channel.

[0079] In some embodiments of the present application, the engine further comprises:

[0080] A circulation pipeline 500 , one end of which is connected to the radiator 300 , and the other end of which is connected to the inlet of the cooling channel. The circulation pipeline 500 is located in front of the axis of the cylinder block 100 .

[0081] The circulating pipeline 500 provides the radiator 300 with cooling liquid with a lower temperature, which exchanges heat with the cooling liquid discharged from the cooling channel, so that the cooling liquid can be effectively cooled and returned to the water pump 200 for recycling, thereby improving the utilization efficiency of the cooling liquid.

[0082] The circulating pipeline 500 is located in the front of the axis of the cylinder body 100, so that the engine is more compact, the assembly and maintenance convenience are improved, and the compactness and light weight of the engine can be effectively improved.

[0083] In some embodiments of the present application, the circulating pipeline 500 crosses the left and right sides of the cylinder body 100 to form a closed loop waterway on the vertical projection plane.

[0084] The closed loop waterway has a shape similar to a "mouth"; the circulating pipeline 500 crosses the two sides of the engine, reduces the risk of pipeline interference and wear of the engine, and highlights the mechanical beauty of the side of the engine.

[0085] In some embodiments of the present application, the engine further comprises:

[0086] The water inlet pipe 600 has a first end connected to the thermostat 400 and a second end connected to the radiator 300, and the water inlet pipe 600 is located in the front of the cylinder body 100.

[0087] The water inlet pipe 600 is used to connect the thermostat 400 and the radiator 300, and transport the cooling liquid in the thermostat 400 to the radiator 300 for heat dissipation. The water inlet pipe 600 is arranged in the front of the cylinder body 100, which can facilitate disassembly and assembly of the water inlet pipe 600, thereby improving the assembly and maintenance convenience, and reasonably utilizing the space of the engine, thereby improving the compactness of the engine.

[0088] In some embodiments of the present application, the engine further comprises:

[0089] The water outlet pipe 700 connects the radiator 300 and the water pump 200, and the water outlet pipe 700 is located in the front of the cylinder body 100.

[0090] The water outlet pipe 700 connects the radiator 300 and the water pump 200, and can return the coolant after the heat of the radiator 300 is cooled to the water pump 200 for recycling. At the same time, the water outlet pipe 700 is located at the front of the cylinder body 100, which is convenient for replacing or repairing the water outlet pipe 700, and also convenient for repairing the radiator 300 or the water pump 200. It is convenient and fast, and can make rational use of the space of the engine, thereby improving the compactness of the engine.

[0091] In some embodiments of the present application, the engine further comprises:

[0092] A connecting pipe 800 , wherein a first end of the connecting pipe 800 is connected to a first end of the water outlet pipe 700 , and a second end of the connecting pipe 800 is connected to the water pump 200 . The connecting pipe 800 is located at the front of the cylinder body 100 .

[0093] The connecting pipe 800 is preferably an iron pipe, one end of which is connected to the liquid inlet of the water pump 200, and the other end of the iron pipe is connected to the water outlet pipe 700 by means of a socket and a clamp. The iron pipe facilitates operations such as replacement of the connecting pipe 800. The connecting pipe 800 is arranged at the front of the cylinder body 100, which is convenient for replacing or repairing the water outlet pipe 700, and also for repairing the radiator 300 or the water pump 200. It is convenient and quick, and can make rational use of the space of the engine, thereby improving the compactness of the engine.

[0094] In some embodiments of the present application, the engine further comprises:

[0095] A box body 900 , wherein the box body 900 is connected to the cylinder body 100 , and the water pump 200 is located at the front of the box body 900 ;

[0096] a clutch, the clutch being mounted in the housing;

[0097] a crankshaft, the crankshaft being mounted in the housing; and

[0098] a water pump, wherein the water pump and the clutch are arranged on the right side of the engine, and the water pump is located on the front side of the housing;

[0099] Wherein, a line connecting the center of the water pump and the center of the clutch is located above the central axis of the crankshaft.

[0100] In the engine of this embodiment, the water pump 200 is located at the front of the housing 900, so that the water pump 200 is high from the ground, reducing the probability of sand and stone impact, and effectively avoiding the problem that the water pump 200 is located on the windward side of the riding and at a low height from the ground, which is easy to be hit by sand and stone during riding, thereby damaging the water pump 200; at the same time, the water pump 200 is closer to the cooling water jacket of the cylinder 100, reducing the length of the water passage, which is conducive to the compactness and lightweight of the engine, thereby avoiding the problem that the water pump 200 is located at a low position and far from the cylinder cooling water jacket, resulting in short cooling water inlet and outlet channels, low cooling efficiency, and disadvantageous to the compactness and optimization of the entire machine; the location of the water pump 200 can be directly connected to the cylinder body, and its high position makes the cooling passage connected to the water pump 200 shorter. The coolant can be directly cooled by the water pump 200 under the pressure of the water pump 200, effectively reducing the time required for the coolant to circulate in the cooling passage to each cooling area, and reducing the fluid resistance of the coolant and the mechanical loss of the engine. Wherein, the housing is a crankcase.

[0101] In the engine of this embodiment, the water pump 200 is located on the right side of the engine, the clutch 301 and the water pump 200 are located on the same side of the engine, and the line connecting the center of the water pump 200 and the center of the clutch 301 is located above the central axis of the crankshaft 201, so that the water pump 200 is high from the ground, reducing the probability of sand and stone impact, and can effectively avoid the problem that the water pump 200 is on the windward side of riding and at a low height from the ground, and is easily hit by sand and stones during riding, thereby damaging the water pump 200; at the same time, the water pump 200 is closer to the cylinder cooling water jacket, reducing the length of the water passage, which is conducive to the compactness and lightweight of the engine, thereby avoiding the problem that the water pump 200 is located at a low position, far from the cylinder cooling water jacket, short cooling water inlet and outlet channels, low cooling efficiency and is not conducive to compact optimization of the entire machine; the water The position of the pump 200 can be directly connected to the cylinder block 100. Its position is relatively high, so that the cooling passage connected to the water pump 200 is shorter. The coolant can directly enter the periphery of the engine for cooling under the pressure of the water pump 200, effectively reducing the time required for the coolant to circulate in the cooling passage to each cooling area, and reducing the fluid resistance of the coolant and the mechanical loss of the engine, thereby effectively solving the technical problem in the related art that the water pump 200 is arranged at the left rear lower part of the engine, the oil pump is driven by the secondary shaft 601, and the water pump 200 is coaxially arranged with the oil pump, resulting in a lower position of the water pump 200. The cooling pipeline connected to the water pump 200 needs to be connected along the entire periphery of the engine, resulting in an increase in the length of the cooling passage, an increase in the time and fluid resistance for the coolant to reach the required position, and an increase in mechanical loss.

[0102] In addition, the height of the water pump 200 is relatively high, which makes the length of the cooling passage shorter, which is beneficial to improving the compactness of the engine and the motorcycle. At the same time, due to the reduction in the length of the cooling passage, the total amount of coolant required by the engine is reduced, which is beneficial to the lightweighting of the entire machine.

[0103] Since the line connecting the center of the water pump 200 and the center of the clutch 301 is located above the central axis of the crankshaft 201, in the right side view of the entire machine, the central axis of the water pump 200 and the central axis of the clutch 301 form a "V"-shaped structure relative to the axis of the crankshaft 201, thereby realizing the V-shaped appearance on the right side of the engine, which is convenient for the ergonomic space of different types of vehicles.

[0104] In some embodiments of the present application, the difference between the distance between the center of the water pump 200 and the center of the crankshaft 201 and the distance between the center of the clutch 301 and the center of the crankshaft 201 is within a preset range, and the preset range is: (e.g. Figure 5 As shown in FIG, the distance between the center of the clutch 301 and the center of the crankshaft 201 is A, and the distance between the center of the water pump 200 and the center of the crankshaft 201 is B).

[0105] The distance between the center of the water pump 200 and the center of the crankshaft 201 is equivalent to the distance between the center of the clutch 301 and the center of the crankshaft 201, that is, the two distances are very close. The preset range is usually, and the threshold range represents the allowable error and the phase difference range that can be controlled to a certain extent, which is beneficial to the balance of the center of gravity of the whole machine and reduces the vibration of the engine.

[0106] In some embodiments of the present application, the engine further comprises:

[0107] The cylinder body is connected to the box body 900, the water pump 200 is connected to the box body 900 and the cylinder body, the water pump 200 is located in front of the axis of the cylinder body, and the water pump 200 is close to the outer surface of the cylinder body.

[0108] A piston rod is provided in the cylinder body, which is connected to the crankshaft 201 through a connecting rod. The connecting rod is driven by the piston rod, and the connecting rod drives the crankshaft 201 to rotate, so as to convert the power in the cylinder body into rotational kinetic energy on the crankshaft 201; wherein, during the operation of the cylinder body 100, a large amount of heat energy will be generated during the operation of the cylinder body 100. At this time, coolant needs to circulate in the cooling channel to take away the heat, thereby reducing the temperature of the cylinder body 100 and avoiding accidents caused by the cylinder body 100. wherein, the water pump 200 is located in front of the axis of the cylinder body, and the water pump 200 is close to the outer surface of the cylinder body, which can effectively shorten the total length of the coolant passage, thereby improving the heat exchange efficiency and the cost of production.

[0109] In some embodiments of the present application, the engine further comprises:

[0110] A balancing shaft 501 rotatably mounted in the housing 900 ;

[0111] A secondary shaft 601 rotatably mounted in the housing 900 ;

[0112] The crankshaft 201 is connected to the balance shaft 501 and the countershaft 601 through a gear assembly, respectively, to transmit power to the balance shaft 501 and the countershaft 601 .

[0113] The balance shaft 501 is rotatably mounted in the housing 900 via a bearing. The crankshaft 201 is mounted on a first gear, and the balance shaft 501 is mounted on a second gear. The first gear and the second gear are meshed with each other.

[0114] The countershaft 601 is rotatably mounted in the housing 900 via a bearing. A third gear is mounted on the countershaft 601, and the third gear is meshed with the first gear. The rotation of the crankshaft 201 can be transmitted to the second gear and the third gear respectively through the first gear, thereby driving the balance shaft 501 and the countershaft 601 to rotate. Through this transmission method, space in the width direction of the engine can be effectively saved. By meshing the third gear and the second gear respectively through the first gear, there is no need to add additional gears connected to the second gear or the third gear on the crankshaft 201, which can effectively improve the compactness of the engine.

[0115] In some embodiments of the present application, the engine further comprises:

[0116] Output shaft, the output shaft is installed in the housing 900, and the crankshaft 201, the countershaft 601 and the output shaft are arranged in a triangle;

[0117] The crankshaft 201 and the output shaft are arranged front to back, and the secondary shaft 601 is arranged above the center line connecting the crankshaft 201 and the output shaft.

[0118] The crankshaft 201 and the output shaft are arranged in front and back, and the countershaft 601 is provided above the center line connecting the crankshaft 201 and the output shaft, which effectively shortens the distance between the crankshaft 201 and the output shaft, thereby reducing the width space used for the engine on the same straight line, making the engine more compact and lightweight, thereby promoting the lightweight and compactness of the motorcycle;

[0119] In some embodiments of the present application, the balance shaft 501 is disposed in front of the crankshaft 201 .

[0120] Since other mechanisms cannot be arranged in front of the crankshaft 201, arranging the balance shaft 501 in front of the crankshaft 201 has no effect on the overall size of the engine and can further improve the compactness of the engine.

[0121] The crankshaft 201 is connected to the balance shaft 501 through a gear and drives the balance shaft 501 . The balance shaft 501 is used to reduce vibration of the power machinery.

[0122] In some embodiments of the present application, the water pump 200 includes:

[0123] The water pump 200 body and the clutch 301 are arranged on the right side of the engine, and the water pump 200 is located on the front side of the box 900;

[0124] The water pump 200 shaft is mounted on the water pump 200 body and is used to drive the impeller on the water pump 200 body to rotate;

[0125] A first gear is mounted on the shaft of the water pump 200;

[0126] The balancing shaft 501 is provided with a second gear, and the second gear is meshed with the first gear.

[0127] The balance shaft 501 rotates under the drive of the crankshaft 201, driving the first gear to rotate. The first gear transmits power to the water pump 200 shaft through the second gear meshing with it. The meshing ratio between the first gear and the second gear can be adjusted. The speed ratio of the water pump 200 shaft and the balance shaft 501 can be adjusted according to different meshing ratios between the first gear and the second gear. It is not limited to a speed ratio fixed at 1. The meshing ratio of the first gear and the second gear can be set according to demand, thereby setting the speed ratio between the water pump 200 shaft and the balance shaft 501. At the same time, the water pump 200 shaft is not coaxial with the balance shaft 501, which can be flexibly arranged, effectively improve the compactness of the engine, and reasonably layout the water pump 200.

[0128] In some embodiments of the present application, a driven gear is further provided on the balance shaft 501 , and a driving gear is provided on the crankshaft 201 . The driving gear and the driven gear are meshed with each other, and the second gear is located outside the driven gear.

[0129] On the one hand, it is convenient to assemble the first gear without affecting the assembly of the driven gear; on the other hand, the position of the first gear enables the position of the water pump 200 to be adjusted to the outer position of the balance shaft 501 on the first gear, which can reserve enough space for the water pump 200 and make the engine more compact and the space utilization more reasonable.

[0130] In some embodiments of the present application, a lifting lug is provided on the front of the cylinder 100;

[0131] The cooling channel comprises:

[0132] a water inlet passage, the water inlet passage being in communication with the water pump 200 and being arranged around the lifting lug;

[0133] A vertical passage is connected to the water inlet passage and the thermostat 400, and the vertical passage is overlapped with the lifting ear.

[0134] While ensuring the strength of the lifting lug, the rigidity of the mouth of the vertical passage is enhanced, the sealing of the mouth of the vertical passage is greatly improved, and there is no need to thicken the cylinder wall to reinforce the mouth of the vertical passage, thereby reducing the weight; the overlapping arrangement of the vertical water channel and the lifting lug also provides conditions for reducing the resistance of the water passage, that is, the water inlet passage and the water cavity wall surrounding the cylinder hole adopt a tangential and guide slope for a smooth transition, avoiding the risk of water entering the casting shrinkage cavity.

[0135] An embodiment of the present application also provides a motorcycle, which includes the engine as described above. The motorcycle effectively solves the technical problems existing in the related art that since the channels need to be connected around the periphery of the engine to cool the engine with the coolant passing through the channels, the total length of the water channel will increase, resulting in an increase in the time and fluid resistance required for the coolant to flow from the water pump 200 to the cylinder body 100, a decrease in cooling efficiency, and an increase in mechanical loss.

[0136] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features thereof can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions 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 comprises: a cylinder body having a cooling passage; a water pump, the water pump being in communication with the cooling channel and being located in front of the axis of the cylinder body; a radiator, the radiator being located in front of the axis of the cylinder block and being in communication with the water pump; and a thermostat, the thermostat being located in front of the axis of the cylinder body and communicating with the radiator and the cooling channel; The water pump is located on the right side of the cylinder body, and the thermostat is located on the left side of the cylinder body; The engine further comprises: a piston, the piston being provided on the cylinder body, the water pump being located in front of the axis of the piston; a water inlet pipe, a first end of the water inlet pipe being connected to the thermostat, and a second end of the water inlet pipe being connected to the radiator, wherein the water inlet pipe is located at the front of the cylinder body; a water outlet pipe, the water outlet pipe connecting the radiator and the water pump, wherein the water outlet pipe is located at the front of the cylinder body; A connecting pipe, wherein a first end of the connecting pipe is connected to a first end of the water outlet pipe, a second end of the connecting pipe is connected to the water pump, and the connecting pipe is located at the front of the cylinder body.

2. The engine according to claim 1, characterized in that The engine further comprises: A circulation pipeline, one end of which is connected to a radiator, and the other end of which is connected to the inlet of the cooling channel, and the circulation pipeline is located in front of the axis of the cylinder body.

3. The engine according to claim 2, characterized in that On the vertical projection plane, the circulation pipeline crosses the left and right side surfaces of the cylinder body to form a closed-loop water channel.

4. The engine according to claim 1, characterized in that The engine further comprises: a box body, the box body being connected to the cylinder body, and the water pump being located at the front of the box body; a clutch, the clutch being mounted in the housing; a crankshaft, the crankshaft being mounted in the housing; and a water pump, wherein the water pump and the clutch are arranged on the right side of the engine, and the water pump is located on the front side of the housing; Wherein, a line connecting the center of the water pump and the center of the clutch is located above the central axis of the crankshaft.

5. The engine according to claim 4, characterized in that The distance between the center of the water pump and the center of the crankshaft is equivalent to the distance between the center of the clutch and the center of the crankshaft.

6. The engine according to claim 4, characterized in that The engine further comprises: A cylinder body, the cylinder body is connected to the box body, the water pump is connected to the box body and the cylinder body, the water pump is located in front of the axis of the cylinder body, and the water pump is close to the outer surface of the cylinder body; a balancing shaft, the balancing shaft being rotatably mounted in the housing; a countershaft, the countershaft being rotatably mounted in the housing; Wherein, the crankshaft is connected to the balance shaft and the countershaft respectively through a gear assembly, so as to transmit power to the balance shaft and the countershaft; An output shaft, the output shaft being mounted in the housing, wherein the crankshaft, the countershaft, and the output shaft are arranged in a triangle; The crankshaft and the output shaft are arranged front to back, and the countershaft is arranged above the center line connecting the crankshaft and the output shaft; The balance shaft is arranged in front of the crankshaft.

7. The engine according to claim 6, characterized in that The engine further comprises: a water pump body, wherein the water pump body and the clutch are arranged on the right side of the engine, and the water pump is located on the front side of the housing; A water pump shaft, the water pump shaft being mounted on the water pump body and being used to drive the impeller on the water pump body to rotate; a first gear mounted on the water pump shaft; A second gear is mounted on the balance shaft, and the second gear is meshed with the first gear; A driven gear is further provided on the balance shaft, and a driving gear is provided on the crankshaft. The driving gear and the driven gear are meshed with each other, and the second gear is located outside the driven gear.

8. A motorcycle, characterized in that: The motorcycle comprises: An engine as claimed in any one of claims 1 to 7.

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