Engine and motorcycle

Abstract

The embodiment of the present application provides an engine and a motorcycle, the engine comprising: a balance shaft; a first gear arranged on the balance shaft; a water pump comprising: a water pump body for driving cooling liquid to cool the engine; a water pump shaft arranged on the water pump body for driving an impeller in the water pump body to rotate; and a second gear arranged on the water pump shaft and engaged with the first gear, effectively solving the technical problem that the water pump shaft is coaxially connected with the balance shaft in the prior art, the balance shaft is used to drive the water pump to rotate, and the water pump is arranged in the above manner, so that the water pump shaft and the balance shaft (crankshaft) rotate at the same speed, the speed ratio is fixed as 1 and cannot be adjusted, which is extremely inconvenient.

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 electricity, 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, in motorcycle engines, the water pump is usually arranged on one side of the balance shaft. The water pump shaft is coaxially connected to the balance shaft, and the water pump is driven by the rotation of the balance shaft. The water pump arrangement in the above manner causes the water pump shaft and the balance shaft (crankshaft) to rotate at the same speed, and the speed ratio is fixed at 1 and cannot be adjusted, which is extremely inconvenient. 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 prior art that the water pump shaft and the balance shaft are coaxially connected, the water pump is driven by the rotation of the balance shaft, and the water pump is arranged in the above manner, resulting in the water pump shaft and the balance shaft (crankshaft) rotating at the same speed, the speed ratio is fixed at 1, and cannot be adjusted, which is extremely inconvenient.

[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] balance shaft;

[0008] a first gear mounted on the balance shaft;

[0009] Water pump, including:

[0010] The water pump body is used to drive the coolant to cool the engine;

[0011] A water pump shaft is provided on the water pump body and is used to drive the impeller in the water pump body to rotate;

[0012] The second gear is mounted on the water pump shaft and meshes with the first gear.

[0013] In some embodiments of the present application, the first gear and the balance shaft are in interference fit.

[0014] In some embodiments of the present application, the first gear is located at an end portion of one end of the balance shaft.

[0015] In some embodiments of the present application, further comprising:

[0016] crankshaft;

[0017] A driving gear, mounted on the crankshaft;

[0018] The driven gear is mounted on the balance shaft and meshes with the driving gear.

[0019] In some embodiments of the present application, the first gear is located outside the driven gear.

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

[0021] an inner race mounted on the balance shaft, the driven gear being mounted on the inner race;

[0022] a retaining ring located between the first gear and the driven gear, the inner race having a mounting groove, the retaining ring being mounted on the mounting groove; and

[0023] a washer, disposed between the retaining ring and the driven gear;

[0024] Wherein, the outer diameter of the mounting journal of the retaining ring, the outer diameter of the mounting journal of the washer and the inner hole diameter of the driven gear are all larger than the outer diameter of the tooth top circle of the first gear.

[0025] In some embodiments of the present application, further comprising:

[0026] a housing, wherein the water pump is located at the front of the housing, and the crankshaft is installed in the housing;

[0027] a cylinder body, the cylinder body being connected to the housing, the water pump being connected to the housing and the cylinder body, the water pump being located in front of an axis of the cylinder body and adjacent to an outer surface of the cylinder body, the balance shaft being rotatably mounted in the housing and disposed in front of the crankshaft;

[0028] A countershaft, the countershaft being rotatably mounted in the housing, the crankshaft being connected to the balance shaft and the countershaft via a gear assembly, respectively, to transmit power to the balance shaft and the countershaft;

[0029] 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;

[0030] The crankshaft and the output shaft are arranged front to back, and the secondary shaft is arranged above a center line connecting the crankshaft and the output shaft.

[0031] In some embodiments of the present application, further comprising:

[0032] a clutch, the clutch being mounted in the housing;

[0033] 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. The line connecting the center of the water pump and the center of the clutch is located above the central axis of the crankshaft.

[0034] 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;

[0035] In some embodiments of the present application, further comprising:

[0036] a radiator, the radiator being located in front of the axis of the cylinder block and being in communication with the water pump; and

[0037] a thermostat, the thermostat being located in front of the axis of the cylinder body, the cylinder body having a cooling channel, the water pump being in communication with the cooling channel, and the thermostat being in communication with the radiator and the cooling channel;

[0038] 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.

[0039] In some embodiments of the present application, further comprising:

[0040] 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, wherein the circulation pipeline is located in front of the axis of the cylinder body and crosses the left and right side surfaces of the cylinder body in a vertical projection plane to form a closed water circuit;

[0041] 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;

[0042] 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;

[0043] 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.

[0044] The present invention further provides a motorcycle, which includes the engine as described above.

[0045] Compared with the prior art, the embodiments of the present invention have the following advantages:

[0046] An embodiment of the present invention provides an engine comprising: a balance shaft, a first gear, and a water pump. The water pump comprises a water pump body, a water pump shaft, and a second gear. The balance shaft rotates under the drive of the engine, driving the first gear to rotate. The first gear transmits power to the water pump shaft via the second gear meshing therewith. This allows for flexible setting of the transmission ratio between the first gear and the second gear according to water pump flow or layout requirements. The speed ratio between the water pump shaft and the balance shaft can be adjusted based on different transmission ratios between the first gear and the second gear, and is not limited to a fixed speed ratio of 1. The speed ratio between the first gear and the second gear can be set as required to set the speed ratio between the water pump shaft and the balance shaft. The water pump shaft is not coaxial with the balance shaft, which allows for flexible layout, effectively improves the compactness of the engine, and rationally arranges the water pump. This effectively solves the technical problem in the prior art that the water pump shaft and the balance shaft are coaxially coupled, and the water pump is driven by the rotation of the balance shaft. The water pump arrangement in this manner results in the water pump shaft and the balance shaft (crankshaft) rotating at the same speed, with a fixed speed ratio of 1 and no adjustment, which is extremely inconvenient.

[0047] An embodiment of the present invention also provides a motorcycle, which, by adopting the engine as described above, can effectively solve the technical problem in the prior art that the water pump shaft and the balance shaft are coaxially connected, the water pump is driven by the rotation of the balance shaft, and the water pump is arranged in the above manner, resulting in the water pump shaft and the balance shaft (crankshaft) rotating at the same speed, the speed ratio is fixed at 1, and cannot be adjusted, which is extremely inconvenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] 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.

[0049] Figure 1 This is a first structural schematic diagram of an engine provided by an embodiment of the present invention;

[0050] Figure 2 is a cross-sectional view of an engine provided by an embodiment of the present invention;

[0051] Figure 3 This is a first structural schematic diagram of a motorcycle provided by an embodiment of the present invention;

[0052] Figure 4 is a second structural schematic diagram of a motorcycle provided by an embodiment of the present invention;

[0053] Figure 5 is a third structural schematic diagram of a motorcycle provided by an embodiment of the present invention;

[0054] Figure 6 This is a right side view of an engine provided by an embodiment of the present invention;

[0055] Figure 7 It is a left side view of an engine provided by an embodiment of the present invention;

[0056] Figure 8 It is a top view of an engine provided by an embodiment of the present invention.

[0057] in:

[0058] 100, cylinder block; 200, water pump; 300, radiator; 400, thermostat; 500, circulation pipeline; 600, water inlet pipe; 700, water outlet pipe; 800, connecting pipe; 900, casing; 101, water pump body; 102, second gear; 103, water pump shaft; 201, crankshaft; 301, clutch; 302, first gear; 401, driven gear; 501, balance shaft; 502, inner race; 601, countershaft; 602, retaining ring; 701, washer. DETAILED DESCRIPTION

[0059] 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.

[0060] 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.

[0061] 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 integral connections. They can also refer to mechanical connections or electrical connections. They can also refer to direct connections or indirect connections through an intermediate medium. They can also refer to internal connections between two components. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0062] 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.

[0063] like Figure 1-2 As shown, Figure 1 A schematic structural diagram of an engine provided by an embodiment of the present invention;

[0064] This embodiment provides an engine, which includes:

[0065] Balance shaft 501;

[0066] The first gear 302 is mounted on the balance shaft 501;

[0067] The water pump 200 includes:

[0068] The water pump body 101 is used to drive the coolant to cool the engine;

[0069] The water pump shaft 103 is provided on the water pump body 101 and is used to drive the impeller in the water pump body 101 to rotate;

[0070] The second gear 102 is mounted on the water pump shaft 103 and meshes with the first gear 302 .

[0071] In the engine provided in this embodiment, the balance shaft 501 rotates under the drive of the crankshaft, driving the first gear 302 to rotate, and the first gear 302 transmits power to the water pump shaft 103 through the second gear 102 meshing therewith. The transmission ratio between the first gear 302 and the second gear 102 can be adjusted. The speed ratio of the water pump shaft 103 and the balance shaft 501 can be adjusted according to different transmission ratios between the first gear 302 and the second gear 102, and is not limited to a fixed speed ratio of 1. The speed ratio of the first gear 302 and the second gear 102 can be set as needed. The transmission ratio of the gear 102 sets the speed ratio between the water pump shaft 103 and the balance shaft 501. At the same time, the water pump shaft 103 is not coaxial with the balance shaft 501, which can be flexibly arranged, effectively improve the compactness of the engine, and reasonably arrange the water pump, thereby effectively solving the existing technical problem that the water pump shaft 103 and the balance shaft 501 are coaxially connected, and the water pump is driven by the rotation of the balance shaft 501. The water pump is arranged in the above manner, resulting in the water pump shaft 103 and the balance shaft 501 (crankshaft) rotating at the same speed, the speed ratio is fixed to 1, and cannot be adjusted, which is extremely inconvenient.

[0072] In some embodiments of the present application, the first gear 302 and the balance shaft 501 are interference fit.

[0073] The first gear 302 can be installed on the balancing shaft 501 by means of a key (spline, flat key or semicircular key, etc.), interference fit or welding. In this embodiment, the first gear 302 is installed on the balancing shaft 501 by interference fit, so that the first gear 302 can rotate synchronously with the balancing shaft 501 and simultaneously drive the meshed second gear 102 to drive the water pump shaft 103 to rotate.

[0074] In some embodiments of the present application, the first gear 302 is located at an end of one end of the balance shaft 501 .

[0075] The first gear 302 is located at the end of one end of the balancing shaft 501, which can facilitate the installation of the first gear 302 and the arrangement of the water pump. On the one hand, it is convenient for the assembly and disassembly of the first gear 302. On the other hand, by arranging the first gear 302 at the end of one end of the balancing shaft 501, the first gear 302 will not affect the installation of other gears of the balancing shaft 501 on the balancing shaft 501.

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

[0077] crankshaft;

[0078] A driving gear, mounted on the crankshaft;

[0079] The driven gear 401 is mounted on the balance shaft 501 and meshes with the driving gear.

[0080] The crankshaft converts the power generated by the reciprocating motion of the piston into rotational kinetic energy through the connecting rod, thereby outputting the power to the balance shaft 501 and the countershaft, and then outputting it to the wheels through the countershaft. The driving gear is mounted on the crankshaft by interference fit, welding or spline connection.

[0081] The driven gear 401 and the driving gear are meshed with each other, so that the power on the driving gear can be transmitted to the driven gear 401, wherein the driven gear 401 is installed on the balancing shaft 501 by welding, spline connection, interference fit or by arranging a buffer spring, pin, etc. in the middle, so as to drive the balancing shaft 501 to rotate under the action of the driving gear.

[0082] In some embodiments of the present application, the first gear 302 is located outside the driven gear 401 .

[0083] The first gear 302 is located on the outside of the driven gear 401. On the one hand, it is convenient to assemble the first gear 302 without affecting the assembly of the driven gear 401. On the other hand, the position of the first gear 302 enables the position of the water pump to be adjusted to the outside position of the balance shaft 501 on the first gear 302, which can reserve enough space for the water pump and make the engine more compact and the space utilization more reasonable.

[0084] In some embodiments of the present application, further comprising:

[0085] The inner race 502 is mounted on the balance shaft 501 , and the driven gear 401 is mounted on the inner race 502 .

[0086] The inner race 502 is sleeved on the balancing shaft 501 and can be installed on the balancing shaft 501 by interference fit or spline connection, so that the inner race 502 and the balancing shaft 501 rotate synchronously. The driven gear 401 is sleeved on the inner race 502, and a buffer mechanism composed of a spring (or rubber) and a pin is usually arranged between the two. When the spring (or rubber) is compressed to a certain extent, the driven gear 401 and the inner race 502 are pressed against the pin at the same time and rotate synchronously.

[0087] In some embodiments of the present application, further comprising:

[0088] A retainer ring 602 is located between the first gear 302 and the driven gear 401, and the inner ring seat has a mounting groove, and the retainer ring 602 is mounted on the mounting groove.

[0089] The retainer ring 602 is embedded and mounted in the mounting groove, and the mounting groove is located between the first gear 302 and the driven gear 401.

[0090] In some embodiments of the present application, further comprising:

[0091] A washer 701 is arranged between the retainer ring 602 and the driven gear 401.

[0092] The washer 701 is used to contact the driven gear 401 to prevent the driven gear 401 from deviating during operation, and the retainer ring 602 contacts the washer 701 to prevent the washer 701 from coming out; the other side of the driven gear 401 is limited by a wave washer and a flat washer to prevent the driven gear 401 from deviating from the axis.

[0093] In some embodiments of the present application, the mounting journal outer diameter of the retainer ring, the mounting journal outer diameter of the washer, and the inner hole diameter of the driven gear are all greater than the addendum circle outer diameter of the first gear.

[0094] The first gear 302 is outside the driven gear 401 of the balance shaft 501, and the addendum circle outer diameter is smaller than the mounting journal outer diameter of the retainer ring 602 and the washer 701, and the inner hole diameter of the driven gear 401, so that the driven gear 401 of the balance shaft 501 is easy to assemble, as shown in Figure 2 The addendum circle outer diameter of the first gear 302 is A, the mounting journal outer diameter of the retainer ring and the mounting journal outer diameter of the flat washer are B, and the inner hole diameter of the driven gear of the balance shaft is C, wherein B and C are greater than A.

[0095] In some embodiments of the present application, further comprising:

[0096] A box, the water pump is located in the front of the box, and the crankshaft is mounted in the box;

[0097] A cylinder, the cylinder is connected with the box, the water pump connects the box and the cylinder, the water pump is located in the front side of the axis of the cylinder, and the water pump is close to the outer surface of the cylinder, the balance shaft is rotatably mounted in the box, and the balance shaft is arranged in front of the crankshaft;

[0098] A countershaft, the countershaft is rotatably mounted in the box, and the crankshaft is connected with the balance shaft and the countershaft through a gear assembly to drive the balance shaft and the countershaft;

[0099] An output shaft is arranged in the box, the crankshaft, the countershaft and the output shaft are arranged in a triangular shape;

[0100] The crankshaft and the output shaft are arranged in front and back, and the countershaft is arranged above the center line of the crankshaft and the output shaft.

[0101] A piston rod is arranged in the cylinder body, connected with the crankshaft 201 through a connecting rod, the connecting rod drives the crankshaft 201 to rotate to convert the power in the cylinder body into rotational kinetic energy on the crankshaft 201; during the working process of the cylinder body 100, a large amount of heat energy is generated, at this time, the cooling liquid 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 on the front side 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 cooling liquid passage, thereby improving the heat exchange efficiency and the cost of production and manufacturing.

[0102] A balance shaft 501 is rotatably arranged in the box 900;

[0103] A countershaft 601 is rotatably arranged in the box 900;

[0104] The crankshaft 201 is connected with the balance shaft 501 and the countershaft 601 through a gear assembly, and drives the balance shaft 501 and the countershaft 601.

[0105] The balance shaft 501 is rotatably mounted in the box 900 through a bearing, a first gear is arranged on the crankshaft 201, and a second gear is arranged on the balance shaft 501, the first gear and the second gear are engaged with each other;

[0106] The countershaft 601 is rotatably mounted in the box 900 through a bearing, a third gear is arranged on the countershaft 601, and the third gear is engaged with the first gear, the rotation of the crankshaft 201 can be transmitted to the second gear and the third gear through the first gear, thereby driving the balance shaft 501 and the countershaft 601 to rotate; through this transmission mode, the space in the width direction of the engine can be effectively saved, the third gear and the second gear are engaged with the first gear respectively, without the need to additionally increase gears connected with the second gear or the third gear on the crankshaft 201, the compactness of the engine can be effectively improved.

[0107] 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;

[0108] 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.

[0109] 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;

[0110] The balance shaft 501 is disposed in front of the crankshaft 201 .

[0111] 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.

[0112] 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.

[0113] In some embodiments of the present application, further comprising:

[0114] a clutch, the clutch being mounted in the housing;

[0115] 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. The line connecting the center of the water pump and the center of the clutch is located above the central axis of the crankshaft.

[0116] The water pump 200 is located at the front of the crankcase 900, so that the water pump 200 is high from the ground, reducing the probability of sandstone impact, and effectively avoiding the problem that the water pump 200 is in the riding windward surface and is low from the ground, is easily impacted by sandstone during riding, and is damaged; at the same time, the water pump 200 is closer to the cylinder body 100 cooling water jacket, reducing the length of the water passage, which is beneficial to the compactness and light weight of the engine, thereby avoiding the problem that the position of the water pump 200 is low, and the distance from the cylinder cooling water jacket is far, the cooling water inlet and outlet channel is short, the cooling efficiency is low, and it is not conducive to the compactness optimization of the whole machine; the position of the water pump 200 can be directly connected with the cylinder body, and the position is high, so that the cooling passage connected with the water pump 200 is short, the coolant can directly enter the periphery of the engine under the pressurization of the water pump 200, effectively reducing the time required for the coolant to flow to each cooling area in the cooling passage, and reducing the fluid resistance of the coolant and the mechanical loss of the engine. The box is a crankcase.

[0117] The water pump 200 is located at the right side of the engine, the clutch 301 is located at the same side of the water pump 200 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 center axis of the crankshaft 201, so that the water pump 200 is high from the ground, reducing the probability of sandstone impact, and effectively avoiding the problem that the water pump 200 is in the riding windward surface and is low from the ground, is easily impacted by sandstone during riding, and is damaged; at the same time, the water pump 200 is closer to the cylinder body cooling water jacket, reducing the length of the water passage, which is beneficial to the compactness and light weight of the engine, thereby avoiding the problem that the position of the water pump 200 is low, and the distance from the cylinder cooling water jacket is far, the cooling water inlet and outlet channel is short, the cooling efficiency is low, and it is not conducive to the compactness optimization of the whole machine; the position of the water pump 200 can be directly connected with the cylinder body 100, and the position is high, so that the cooling passage connected with the water pump 200 is short, the coolant can directly enter the periphery of the engine under the pressurization of the water pump 200, effectively reducing the time required for the coolant to flow to each cooling area in the cooling passage, 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 side of the engine, the water pump 200 and the oil pump are coaxially arranged by the auxiliary shaft 601, the position of the water pump 200 is low, the cooling pipeline connected with the water pump 200 needs to be connected along the whole engine periphery, the length of the cooling passage is increased, the time of the coolant to the required position and the fluid resistance are increased, and the mechanical loss is increased.

[0118] 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 2 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).

[0119] 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.

[0120] In some embodiments of the present application, further comprising:

[0121] a radiator 300 , the radiator 300 being connected to the outlet of the coolant flow channel and to the water pump 200 ; and

[0122] a thermostat 400 , the thermostat being located in front of the axis of the cylinder body, the cylinder body having a cooling channel, the water pump being in communication with the cooling channel, and the thermostat being in communication with the radiator and the cooling channel;

[0123] 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 .

[0124] 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;

[0125] The radiator 300 dissipates heat from the coolant flowing out of the cylinder 100, and then returns the dissipated coolant to the water pump 200, which drives the coolant through the water pump 200 to recycle the coolant.

[0126] As a result, the distance between the water pump 200 and the radiator 300 and the distance between the thermostat and the radiator 300 are reduced, which greatly shortens the total length of the cooling passage, helps to speed up the flow of coolant in the cooling passage, and effectively improves the cooling efficiency.

[0127] In the motorcycle 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 advantageous in shortening the total length of the external pipe 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 existing 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, a decrease in cooling efficiency and an increase in mechanical losses.

[0128] 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.

[0129] 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;

[0130] 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.

[0131] 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;

[0132] 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.

[0133] In some embodiments of the present application, the motorcycle further comprises:

[0134] The piston is provided on the cylinder body 100 , and the water pump 200 is located in front of the axis of the piston.

[0135] 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.

[0136] In some embodiments of the present application, the motorcycle further comprises:

[0137] 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 .

[0138] The circulation pipeline 500 provides the radiator 300 with coolant at a lower temperature, which exchanges heat with the coolant flowing out of the cooling channel after heat exchange, so that the coolant can be effectively cooled and returned to the water pump 200 for recycling, thereby improving the utilization efficiency of the coolant.

[0139] The circulation line 500 is located in front of the axis of the cylinder 100 , which makes the motorcycle more compact, improves the convenience of assembly and maintenance, and can effectively improve the compactness and lightness of the motorcycle.

[0140] In some embodiments of the present application, on a vertical projection plane, the circulation pipeline 500 crosses the left and right side surfaces of the cylinder body 100 to form a closed-loop water circuit.

[0141] The closed-loop water channel is shaped like a "mouth"; the circulating pipeline 500 crosses the two sides of the motorcycle, reducing the hidden dangers of pipeline interference and wear of the motorcycle while further highlighting the mechanical beauty of the side of the motorcycle.

[0142] In some embodiments of the present application, the motorcycle further comprises:

[0143] A water inlet pipe 600 , wherein a first end of the water inlet pipe 600 is connected to the thermostat 400 , and a second end of the water inlet pipe 600 is connected to the radiator 300 , wherein the water inlet pipe 600 is located at the front of the cylinder body 100 .

[0144] The water inlet pipe 600 is used to connect the thermostat 400 and the radiator 300, and transports the coolant passing through the thermostat 400 to the radiator 300 for heat dissipation. The water inlet pipe 600 is arranged at the front part of the cylinder body 100, which can facilitate the disassembly and assembly of the water inlet pipe 600, thereby improving the convenience of assembly and maintenance, and at the same time can reasonably utilize the space of the motorcycle, thereby improving the compactness of the motorcycle.

[0145] In some embodiments of the present application, the motorcycle further comprises:

[0146] A water outlet pipe 700 is connected to the radiator 300 and the water pump 200 , wherein the water outlet pipe 700 is located at the front of the cylinder body 100 .

[0147] The water outlet pipe 700 connects the radiator 300 and the water pump 200, and can return the coolant after the heat is dissipated by the radiator 300 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 motorcycle, thereby improving the compactness of the motorcycle.

[0148] In some embodiments of the present application, the motorcycle further comprises:

[0149] 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 .

[0150] 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 motorcycle, thereby improving the compactness of the motorcycle.

[0151] The present invention also provides a motorcycle, comprising the engine as described above;

[0152] By adopting the engine as described above, the motorcycle can effectively solve the technical problem in the prior art that the water pump shaft 103 and the balance shaft 501 are coaxially connected, the water pump is driven by the rotation of the balance shaft 501, and the water pump is arranged in the above manner, resulting in the water pump shaft 103 and the balance shaft 501 (crankshaft) rotating at the same speed, the speed ratio is fixed at 1, and cannot be adjusted, which is extremely inconvenient.

[0153] 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: balance shaft; a first gear mounted on the balance shaft; Water pump, including: The water pump body is used to drive the coolant to cool the engine; A water pump shaft is provided on the water pump body and is used to drive the impeller in the water pump body to rotate; a second gear, mounted on the water pump shaft and meshing with the first gear; The first gear and the balance shaft are in interference fit, and the first gear is located at an end portion of one end of the balance shaft; The engine further comprises: crankshaft; A driving gear, mounted on the crankshaft; A driven gear is mounted on the balance shaft and meshes with the driving gear; The first gear is located outside the driven gear; The engine further comprises: a housing, wherein the water pump is located at the front of the housing, and the crankshaft is installed in the housing; a cylinder body, the cylinder body being connected to the housing, the water pump being connected to the housing and the cylinder body, the water pump being located in front of an axis of the cylinder body and adjacent to an outer surface of the cylinder body, the balance shaft being rotatably mounted in the housing and disposed in front of the crankshaft; A countershaft, the countershaft being rotatably mounted in the housing, the crankshaft being connected to the balance shaft and the countershaft via a gear assembly, respectively, 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 engine further comprises: 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, the cylinder body having a cooling channel, the water pump being in communication with the cooling channel, and the thermostat being in communication 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 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, wherein the circulation pipeline is located in front of the axis of the cylinder body and crosses the left and right side surfaces of the cylinder body in a vertical projection plane to form a closed water circuit; 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 Also includes: an inner race mounted on the balance shaft, the driven gear being mounted on the inner race; a retaining ring, located between the first gear and the driven gear, the inner race having a mounting groove, the retaining ring being mounted on the mounting groove; as well as a washer, disposed between the retaining ring and the driven gear; Wherein, the outer diameter of the mounting journal of the retaining ring, the outer diameter of the mounting journal of the washer and the inner hole diameter of the driven gear are all larger than the outer diameter of the tooth top circle of the first gear.

3. The engine according to claim 1, characterized in that Also includes: a clutch, the clutch being mounted in the housing; 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. The line connecting the center of the water pump and the center of the clutch is located above the central axis of the crankshaft.

4. The engine according to claim 3, characterized in that A difference between a distance between a center of the water pump and a center of the crankshaft and a distance between a center of the clutch and a center of the crankshaft is within a preset range.

5. A motorcycle, characterized in that: The motorcycle comprises: An engine as claimed in any one of claims 1 to 4.

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