CN218266084U - Engine and motorcycle - Google Patents

Abstract

An embodiment of the utility model provides an engine and motorcycle, the engine includes: a cylinder having a cooling channel; a water pump in communication with the cooling channel, the water pump being located forward of the axis of the cylinder; a radiator located forward of an axis of the cylinder block, the radiator being in communication with the water pump; and a thermostat located in front of an axis of the cylinder block, the thermostat communicating the radiator and the cooling passage; the water pump is positioned on the right side of the cylinder body, and the thermostat is positioned on the left side of the cylinder body; the technical problem that the total length of a water passage is increased due to the fact that the water pump is arranged on the rear side of the cylinder axis in the related art is effectively solved.

Description

Engine and motorcycle

Technical Field

The utility model relates to a technical field of motorcycle especially relates to an engine and motorcycle.

Background

The motorcycle comprises two wheels or three wheels, is driven by electric power, fuel oil or hybrid power and the like, is light and flexible, can run quickly, is widely used for patrol, passenger and goods transportation and the like, and is also used as sports equipment. In a large direction, motorcycles are classified into street cars, racing engines, off-road engines, cruise cars, station wagons, and the like.

At present, along with the trend of the entertainment function requirement of motorcycle products, the light weight and compact requirement of the engine is more and more obvious; the cooling liquid of the engine of the motorcycle is sucked by the water pump, then is pressurized by the water pump, is guided into each channel, and is sent to the cylinder body and the cylinder body under the action of the water pump to cool the cylinder body and the cylinder body.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problems, an object of the present invention is to provide an engine for solving the technical problem existing in the related art that the total length of a water passage is increased due to a water pump disposed at the rear side of a cylinder axis.

In order to solve the technical problem, the embodiment of the utility model adopts the following technical scheme:

an embodiment of the utility model provides an engine, the engine includes:

a cylinder having a cooling channel;

a water pump in communication with the cooling channel, the water pump being located forward of the axis of the cylinder;

a radiator located forward of an axis of the cylinder block, the radiator being in communication with the water pump; and

a thermostat located forward of an axis of the cylinder, the thermostat communicating the radiator and the cooling passage;

in some embodiments of the present application, the water pump is located on a right side of the cylinder block, and the thermostat is located on a left side of the cylinder block, the engine further comprising:

the piston is arranged on the cylinder body, and the water pump is positioned in the front of the axis of the piston. .

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

and one end of the circulating pipeline is connected with the radiator, and the other end of the circulating pipeline is connected with the cooling channel.

In some embodiments of the present application, the circulation pipeline crosses both left and right sides of the cylinder body on a vertical projection plane, forming a mouth-shaped closed loop waterway.

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

the first end of inlet tube with the thermostat is connected, the second end of inlet tube with the radiator is connected, wherein, the inlet tube is located the front portion of cylinder body.

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

and the water outlet pipe is connected with the radiator and the water pump, and is positioned at the front part of the cylinder body.

In some embodiments of the present application, further comprising:

the first end of the connecting pipe is connected with the first end of the water outlet pipe, the second end of the connecting pipe is connected with the water pump, and the connecting pipe is located in the front of the cylinder body.

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

the engine further includes:

the tank body is connected with the cylinder body, and the water pump is positioned at the front part of the tank body;

the clutch is arranged in the box body;

the crankshaft is arranged in the box body; and

the water pump and the clutch are arranged on the right side of the engine, and the water pump is positioned on the front side of the box body;

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.

In some embodiments of the present application, 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;

in some embodiments of the present application, the engine further comprises:

the cylinder body is connected with the box body, the water pump is connected with the box body and the cylinder body, the water pump is positioned on the front side of the axis of the cylinder body, and the water pump is close to the outer surface of the cylinder body;

the balance shaft is rotatably arranged in the box body;

the auxiliary shaft is rotatably arranged in the box body;

the crankshaft is respectively connected with the balance shaft and the auxiliary shaft through a gear assembly and is used for driving the balance shaft and the auxiliary shaft;

the output shaft is arranged in the box body, and the crankshaft, the auxiliary shaft and the output shaft are arranged in a triangular shape;

the crankshaft and the output shaft are arranged in front and at the back, and the auxiliary shaft is arranged above a central connecting line of the crankshaft and the output shaft;

the balance shaft is arranged in front of the crankshaft.

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

the water pump body and the clutch are arranged on the right side of the engine, and the water pump is positioned on the front side of the box body;

the water pump shaft is arranged on the water pump body and used for driving the impeller on the water pump body to rotate;

the first gear is arranged on the water pump shaft;

a second gear is arranged on the balance shaft and is meshed with the first gear;

the balance shaft is further provided with a driven gear, the crankshaft is provided with a driving gear, the driving gear is meshed with the driven gear, and the second gear is located on the outer side of the driven gear.

Embodiments of the present application also provide a motorcycle comprising:

an engine as described above.

Compared with the prior art, the utility model discloses a beneficial effect of embodiment lies in:

an embodiment of the utility model provides an engine, the engine includes cylinder body, water pump, radiator and thermostat, wherein, the water pump the radiator with the thermostat all is located the front portion of the axis of cylinder body, thereby make the water pump with two big performance parts of thermostat are apart from the distance of radiator reduces, and the total length of external pipeline has been shortened greatly to the very favourable reduction, also shortens cooling channel's total length greatly to reduced the time and the fluid resistance that the coolant liquid flowed to the required position of cylinder body from the water pump, promoted the cooling efficiency of cylinder body and reduced mechanical loss, solved effectively exist among the related art because the water pump arranges the rear side at cylinder body axis, lead to the total length increase of water route, lead to the coolant liquid to flow to the required position of cylinder body from the water pump time and the increase of fluid resistance, influence the reduction of cooling efficiency and the technical problem of the increase of mechanical loss.

An embodiment of the utility model provides a motorcycle adopts the engine as above, the motorcycle has solved effectively that exists among the correlation technique because the water pump is arranged at the rear side of cylinder axis, leads to the total length of water route to increase, leads to the coolant liquid to flow from the water pump to the time of the required position of cylinder body and the increase of fluid resistance, influence the technical problem of the reduction of cooling efficiency and the increase of mechanical loss.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only the embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a right side view of an engine provided by an embodiment of the present invention;

fig. 2 is a left side view of an engine according to an embodiment of the present invention;

fig. 3 is a top view of an engine according to an embodiment of the present invention;

fig. 4 is a schematic diagram of a first structure of an engine according to an embodiment of the present invention;

fig. 5 is a second schematic structural diagram of an engine according to an embodiment of the present invention;

fig. 6 is a schematic diagram of a third structure of an engine according to an embodiment of the present invention.

Wherein:

100. a cylinder body; 200. a water pump; 300. a heat sink; 400. a thermostat; 500. a circulation line; 600. a water inlet pipe; 700. a water outlet pipe; 800. a connecting pipe; 900. a box body; 201. a crankshaft; 301. a clutch; 501. a balance shaft; 601. a secondary shaft.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

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", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description of the embodiments of the present application and for simplicity of description, but do not indicate or imply that the devices or elements referred to must have specific orientations, be configured in specific orientations, and operate, and thus, should not be construed as limiting the embodiments of the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present application, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected" and "connected" should be interpreted broadly, and may be, for example, a fixed connection, an exchangeable connection, a one-piece connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, and a communication between two elements. Specific meanings of the above terms in the embodiments of the present application can be understood in specific cases by those of ordinary skill in the art.

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

As shown in fig. 1-6, fig. 1 is a left side view of an engine according to an embodiment of the present invention;

the present embodiment provides an engine, including:

a cylinder block 100, the cylinder block 100 having a cooling channel;

a water pump 200, the water pump 200 communicating with the cooling passage, the water pump 200 being located in front of the axis of the cylinder block 100;

a radiator 300, the radiator 300 being located at a front portion of an axis of the cylinder block 100, the radiator 300 being in communication with the water pump 200; and

a thermostat 400, the thermostat 400 being located at a front portion of an axis of the cylinder block 100, the thermostat 400 communicating the radiator 300 and the cooling passage.

In the engine of the embodiment, the water pump 200, the radiator 300 and the thermostat 400 are all located at the front of the axis of the cylinder block 100, so that the distance between two major performance components of the water pump 200 and the thermostat 400 and the radiator 300 is reduced, the total length of the external pipeline is advantageously reduced, and the total length of the cooling channel is also greatly reduced, so that the time and the fluid resistance of the coolant flowing from the water pump 200 to the required part of the cylinder block 100 are reduced, the cooling efficiency of the cylinder block 100 is improved, and the mechanical loss is reduced, thereby effectively solving the technical problems in the related art that the total length of the water channel is increased, the time and the fluid resistance of the coolant flowing from the water pump 200 to the required part of the cylinder block 100 are increased, the reduction of the cooling efficiency is affected, and the increase of the mechanical loss is affected due to the fact that the channels need to be connected around the periphery of the engine to cool the engine through the coolant in the channels.

In the present embodiment, the direction of travel of the motorcycle is taken as the front; wherein, the overlook angle of the whole engine, because of the left and right distribution design of the water pump and the thermostat, the external water-free pipeline crosses two side surfaces of the engine and forms a mouth-shaped closed loop water channel by being connected with the water channel in the engine

The water pump 200 is communicated with the cooling liquid storage tank, and the power transmitted by the crankshaft drives the water pump 200 to work, so that the cooling liquid is pressurized and flows out through the water pump 200;

the cooling channel of the cylinder block 100 is built-in and mainly formed by a channel arranged in the cylinder block 100, the cooling liquid pressurized by the water pump 200 flows into the cooling channel, and the water pump 200 is arranged in front of the axis of the cylinder block 100, so that the positions of the water pump 200 and the cooling channel are relatively close to each other, thereby reducing 800 pipelines of the connecting pipe of the water pump 200, improving the transmission efficiency of the cooling liquid, and avoiding the problems that the time and the fluid resistance of the cooling liquid to a required part are increased when an engine is started due to the process of the 800 pipelines of the connecting pipe between the water pump 200 and the cooling channel, the cooling liquid is not delivered to the part of the engine which needs to be cooled, the cooling effect is poor, and the mechanical loss is increased.

The thermostat 400 is communicated with the cooling channel, and the liquid of the cooling channel passes through the thermostat 400 to measure the corresponding temperature and then enters the radiator 300;

the radiator 300 is used for radiating the cooling liquid, is communicated with the thermostat 400, and the cooling liquid enters the radiator 300 for radiating and cooling and returns to the water pump 200 again for recycling.

The water pump 200 is located at the right side of the cylinder block 100, and the thermostat 400 is located at the left side of the cylinder block 100.

By respectively locating the water pump 200 and the thermostat 400 at the left and right sides of the cylinder block 100, the compactness of the engine is improved on one hand, and the aesthetic feeling of the engine is improved on the other hand.

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

and a piston provided on the cylinder block 100, the water pump 200 being located at a front portion of an axis of the piston.

The piston is movably arranged in the cylinder body 100, the water pump 200 is positioned in front of the axis of the piston, and the distance between the water pump 200 and the thermostat 400 and the radiator 300 can be further reduced, so that the total length of an external pipeline is favorably reduced, and the total length of a cooling channel is also greatly reduced.

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

and a circulation line 500, one end of the circulation line 500 being connected to the radiator 300, the other end of the circulation line 500 being connected to an inlet of the cooling passage, the circulation line 500 being located in front of an axis of the cylinder block 100.

The circulation pipeline 500 provides the radiator 300 with a coolant with a lower temperature, and the coolant exchanges heat with the coolant flowing out of the cooling flow channel after heat exchange, so that the coolant can be effectively cooled and returns to the water pump 200 for cyclic utilization, and the utilization efficiency of the coolant is improved.

The circulation line 500 is located at the front of the axis of the cylinder block 100, so that the engine is more compact, the convenience of assembly and maintenance is improved, and the compactness and light weight of the engine can be effectively improved.

In some embodiments of the present application, the circulation duct 500 crosses both left and right sides of the cylinder 100 on a vertical projection plane, forming a closed loop waterway.

Wherein the closed loop waterway is shaped like a "mouth"; the circulation pipeline 500 crosses two side surfaces of the engine in a crossing mode, so that the mechanical aesthetic feeling of the side surface of the engine is more prominent while the potential abrasion of the engine caused by the pipeline is reduced.

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

a water inlet pipe 600, a first end of the water inlet pipe 600 being connected with the thermostat 400, a second end of the water inlet pipe 600 being connected with the radiator 300, wherein the water inlet pipe 600 is located at the front of the cylinder body 100.

The inlet tube 600 is used for connecting thermostat 400 with radiator 300 will dispel the heat on radiator 300 is carried to the cooling liquid in thermostat 400, inlet tube 600 is established the front portion of cylinder body 100 can be convenient for the dismouting inlet tube 600 to improve assembly and maintenance convenience, can rationally utilize the space of engine simultaneously, thereby promoted the compactedness of engine.

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

and the water outlet pipe 700 is connected with the radiator 300 and the water pump 200, wherein the water outlet pipe 700 is positioned at the front part of the cylinder body 100.

The water outlet pipe 700 is connected with the radiator 300 and the water pump 200, so that cooling liquid after the heat dissipation of the radiator 300 can flow back into the water pump 200 for cyclic utilization, and meanwhile, the water outlet pipe 700 is positioned at the front part of the cylinder body 100, so that the water outlet pipe 700 is convenient to replace or maintain, and the radiator 300 or the water pump 200 is also convenient to maintain, is convenient and quick, and can reasonably utilize the space of an engine, thereby improving the compactness of the engine.

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

a first end of the connection pipe 800 is connected to the first end of the water outlet pipe 700, a second end of the connection pipe 800 is connected to the water pump 200, and the connection pipe 800 is located at the front of the cylinder body 100.

The preferred iron pipe of connecting pipe 800, the one end of iron pipe is connected the inlet of water pump 200, the other end of iron pipe through cup joint with the form of clamp with outlet pipe 700 connects, the iron pipe is convenient for right operations such as connecting pipe 800 is changed, wherein, connecting pipe 800 is established the front portion of cylinder body 100 is convenient for change or maintenance outlet pipe 700, also be convenient for right radiator 300 or water pump 200 maintain, convenient and fast can rationally utilize the space of engine simultaneously to the compactedness of engine has been promoted.

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

a tank 900, wherein the tank 900 is connected to the cylinder 100, and the water pump 200 is located at the front of the tank 900;

the clutch is arranged in the box body;

the crankshaft is arranged in the box body; and

the water pump and the clutch are arranged on the right side of the engine, and the water pump is positioned on the front side of the box body;

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.

In the engine of the embodiment, the water pump 200 is located at the front part of the box body 900, so that the water pump 200 is high above the ground, the probability of sand impact is reduced, and the problems that the water pump 200 is located on the riding windward side and is low above the ground, and the water pump 200 is easily impacted by sand during riding to damage the water pump 200 can be effectively avoided; meanwhile, the water pump 200 is closer to the cooling water jacket of the cylinder body 100, the length of a water passage is reduced, and the compactness and the lightweight of an engine are facilitated, so that the problems that the position of the water pump 200 is lower, the distance from the water pump 200 to the cooling water jacket of the cylinder is longer, a cooling water leading-in channel and a cooling water leading-out channel are short, the cooling efficiency is low, and the compactness and the optimization of the whole engine are not facilitated are solved; the water pump 200 is located at a position capable of being directly connected with a cylinder block, and the position is high, so that a cooling passage connected with the water pump 200 is short, and the cooling liquid can directly enter the periphery of the engine for cooling under the pressurization of the water pump 200, thereby effectively reducing the time required for the cooling liquid to flow to each cooling area in the cooling passage, and reducing the fluid resistance of the cooling liquid and the mechanical loss of the engine. Wherein the box body is a crankcase.

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 connection line between 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 located at a high distance from the ground, the probability of sand impact is reduced, and the problems that the water pump 200 is located on the windward side of riding and is low in height from the ground, and the water pump 200 is easily impacted by sand and damaged during riding can be effectively avoided; meanwhile, the water pump 200 is closer to the cylinder body cooling water jacket, the length of a water passage is reduced, and the compactness and the lightweight of an engine are facilitated, so that the problems that the position of the water pump 200 is lower, the distance from the water pump 200 to the cylinder cooling water jacket is longer, cooling water leading-in and leading-out channels are short, the cooling efficiency is low, and the compactness and the optimization of the whole engine are not facilitated are solved; the position of the water pump 200 can be directly connected with the cylinder block 100, and the position is higher, so that a cooling passage connected with the water pump 200 is shorter, the cooling liquid can directly enter the periphery of the engine for cooling under the pressurization of the water pump 200, the time required for the cooling liquid to flow to each cooling area in the cooling passage is effectively reduced, and the fluid resistance of the cooling liquid and the mechanical loss of the engine are reduced, so that the technical problems that the position of the water pump 200 is lower, the cooling pipeline connected with the water pump 200 needs to be connected along the whole periphery of the engine, the length of the cooling passage is increased, the time for the cooling liquid to reach the required position and the fluid resistance are increased, and the mechanical loss is increased due to the fact that the water pump 200 is arranged coaxially with the oil pump by arranging the water pump 200 at the rear lower part of the left side of the engine and driving the oil pump through the auxiliary shaft 601 in the related art are effectively solved.

And the height of the water pump 200 is high, so that the length of the cooling passage is short, the compactness of the engine and the motorcycle is favorably improved, and meanwhile, the total amount of the engine required by the cooling liquid is reduced due to the reduction of the length of the cooling passage, and the light weight of the whole motorcycle is favorably realized.

Because the connection line of the center of the water pump 200 and the center of the clutch 301 is positioned above the central axis of the crankshaft 201, the central axis of the water pump 200 and the central axis of the clutch 301 form a structure similar to a V shape relative to the axis of the crankshaft 201 in the right side view of the whole machine, so that the V-shaped appearance on the right side of the engine is realized, and the ergonomic space of vehicles of different types is facilitated.

In some embodiments of the present application, a difference between a distance between a center of the water pump 200 and a center of the crankshaft 201 and a distance between a center of the clutch 301 and a center of the crankshaft 201 is within a preset range: (ii) a (As shown in FIG. 5, 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)

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 to each other, and the preset range is usually a range in which the threshold value range represents an allowable error and a phase difference that can be controlled to a certain extent, so that the gravity center balance of the whole machine is facilitated, and the vibration of the engine is reduced.

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

the cylinder body with the box 900 is connected, the water pump 200 is connected the box 900 with the cylinder body, the water pump 200 is located the front side of the axis of cylinder body, and the water pump 200 is close to the cylinder body surface.

A piston rod is arranged in the cylinder body and connected with the crankshaft 201 through a connecting rod, the connecting rod is driven through the piston rod, and the connecting rod drives the crankshaft 201 to rotate so as to convert power in the cylinder body into rotational kinetic energy on the crankshaft 201; wherein, at cylinder block 100 in-process of carrying out work, the in-process of carrying out work in the cylinder block 100 can produce a large amount of heat energy, needs to circulate in cooling channel through the coolant liquid this moment to take away the heat, thereby reduce the temperature of cylinder block 100, avoid cylinder block 100 to lead to unexpected the emergence, wherein, water pump 200 is located the front side of the axis of cylinder block, just water pump 200 is close to the cylinder block surface, can subtract the total length of coolant liquid passageway effectively, thereby promotes heat exchange efficiency and production manufacturing's cost.

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

the balance shaft 501, the balance shaft 501 can be rotatably installed in the box 900;

a counter shaft 601, wherein the counter shaft 601 is rotatably arranged in the box body 900;

the crankshaft 201 is connected with the balance shaft 501 and the auxiliary shaft 601 through a gear assembly respectively, and is used for driving the balance shaft 501 and the auxiliary shaft 601.

The balance shaft 501 is rotatably mounted in the box body 900 through a bearing, the crankshaft 201 is provided with a first gear, the balance shaft 501 is provided with a second gear, and the first gear is meshed with the second gear;

the auxiliary shaft 601 is rotatably installed in the box 900 through a bearing, a third gear is installed on the auxiliary shaft 601, the third gear is meshed with the first gear, and the rotation of the crankshaft 201 can be transmitted to a second gear and a third gear through the first gear respectively, so that the balance shaft 501 and the auxiliary shaft 601 are driven to rotate; through the transmission mode, the space in the width direction of the engine can be effectively saved, the first gear is respectively meshed with the third gear and the second gear, a gear connected with the second gear or the third gear is not required to be additionally arranged on the crankshaft 201, and the compactness of the engine can be effectively improved.

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

the output shaft is arranged in the box body 900, and the crankshaft 201, the auxiliary shaft 601 and the output shaft are arranged in a triangular shape;

the crankshaft 201 and the output shaft are arranged in front and at the back, and the auxiliary shaft 601 is arranged above a central connecting line of the crankshaft 201 and the output shaft.

The crankshaft 201 and the output shaft are arranged in front and at the back, the auxiliary shaft 601 is arranged above the central connecting line of the crankshaft 201 and the output shaft, the distance between the crankshaft 201 and the output shaft is effectively shortened, and therefore the width space of the engine on the same straight line can be reduced, the compactness of the engine is better, the light weight degree is higher, and the light weight and the compactness of the motorcycle are promoted;

in some embodiments of the present application, the balance shaft 501 is disposed forward of the crankshaft 201.

Since no other mechanism can be disposed in a position in front of the crankshaft 201, the arrangement position of the balance shaft 501 in the position in front of the crankshaft 201 does not affect the overall size of the engine, and the compactness of the engine can be further improved.

The crankshaft 201 is connected with the balance shaft 501 through a gear and drives the balance shaft 501, and the balance shaft 501 is used for reducing dynamic mechanical vibration.

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

the water pump 200 body, the said water pump 200 body and the said clutch 301 locate at the right side of the said engine, and the said water pump 200 locates at the front side of the said container 900;

the water pump 200 shaft is arranged on the water pump 200 body and used for driving an impeller on the water pump 200 body to rotate;

a first gear installed on the water pump 200 shaft;

the balance shaft 501 is provided with a second gear, and the second gear is engaged with the first gear.

The balance shaft 501 is driven by the crankshaft 201 to rotate to drive the first gear to rotate, the first gear transmits power to the water pump 200 shaft through the second gear meshed with the first gear, the meshing ratio between the first gear and the second gear can be adjusted, the speed ratio between 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, the speed ratio is not limited to the fixed speed ratio of 1, the meshing ratio between the first gear and the second gear can be set according to requirements, so that the speed ratio between the water pump 200 shaft and the balance shaft 501 is set, meanwhile, the water pump 200 shaft is not coaxial with the balance shaft 501, the arrangement is flexible, the compactness of an engine can be effectively improved, and the water pump 200 can be reasonably arranged.

In some embodiments of the present application, a driven gear is further disposed on the balance shaft 501, a driving gear is disposed on the crankshaft 201, the driving gear and the driven gear are engaged with each other, and the second gear is located outside the driven gear.

On one hand, the first gear is convenient to assemble, and the assembly of the driven gear is not influenced; on the other hand, the position of the first gear can enable the position of the water pump 200 to be adjusted at the position where the balance shaft 501 is located outside the first gear, enough position can be reserved for the water pump 200, the engine can be more compact, and the space utilization is more reasonable.

In some embodiments of the present application, the front portion of the cylinder block 100 is provided with a lifting lug;

the cooling passage includes:

a water inlet passage which is communicated with the water pump 200 and is arranged around the lifting lug;

a vertical passage communicating the water inlet passage and the thermostat 400, and provided to overlap with a lifting lug.

The strength of the lifting lug is ensured, meanwhile, the rigidity of the opening part of the vertical passage is enhanced, the sealing performance of the opening part of the vertical channel is greatly improved, the cylinder wall is not required to be thickened to reinforce the opening part of the vertical channel, and the weight is reduced; the vertical water channel is overlapped with the lifting lugs, and a condition is provided for reducing the resistance of the water channel, namely, the water inlet channel and the wall surface of the water cavity surrounding the cylinder hole adopt tangential and guide slope smooth transition, so that the risk that water enters the casting shrinkage cavity is avoided.

Embodiments of the present application also provide a motorcycle including an engine as described above, which effectively solves the technical problems in the related art that the total length of a water passage will increase due to the fact that channels need to be connected around the periphery of the engine to cool the engine by coolant in the channels, resulting in an increase in time and fluid resistance of the coolant flowing from the water pump 200 to a portion of the cylinder block 100 that is required, a decrease in cooling efficiency, and an increase in mechanical loss.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. An engine, characterized in that the engine comprises:

a cylinder having a cooling channel;

a water pump in communication with the cooling channel, the water pump being located forward of the axis of the cylinder;

a radiator located forward of an axis of the cylinder block, the radiator being in communication with the water pump; and

a thermostat located forward of an axis of the cylinder block, the thermostat communicating the radiator and the cooling passage;

the water pump is located the right side of cylinder body, the thermostat is located the left side of cylinder body.

2. The engine of claim 1, further comprising:

the piston is arranged on the cylinder body, and the water pump is positioned in front of the axis of the piston.

3. The engine of claim 2, further comprising:

and one end of the circulating pipeline is connected with the radiator, the other end of the circulating pipeline is connected to the inlet of the cooling channel, and the circulating pipeline is positioned in the front of the axis of the cylinder body.

4. The engine of claim 3, wherein the circulation pipeline crosses the left and right sides of the cylinder body on a vertical projection plane to form a closed loop waterway.

5. The engine of claim 1, further comprising:

the first end of the water inlet pipe is connected with the thermostat, the second end of the water inlet pipe is connected with the radiator, and the water inlet pipe is positioned at the front part of the cylinder body;

the water outlet pipe is connected with the radiator and the water pump, and is positioned at the front part of the cylinder body;

the first end of the connecting pipe is connected with the first end of the water outlet pipe, the second end of the connecting pipe is connected with the water pump, and the connecting pipe is located in the front of the cylinder body.

6. The engine of claim 1, further comprising:

the tank body is connected with the cylinder body, and the water pump is positioned at the front part of the tank body;

the clutch is arranged in the box body;

the crankshaft is arranged in the box body; and

the water pump and the clutch are arranged on the right side of the engine, and the water pump is positioned on the front side of the box body;

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.

7. The engine of claim 6, wherein 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.

8. The engine of claim 6, further comprising:

the cylinder body is connected with the box body, the water pump is connected with the box body and the cylinder body, the water pump is positioned on the front side of the axis of the cylinder body, and the water pump is close to the outer surface of the cylinder body;

the balance shaft is rotatably arranged in the box body;

the auxiliary shaft is rotatably arranged in the box body;

the crankshaft is respectively connected with the balance shaft and the auxiliary shaft through a gear assembly and drives the balance shaft and the auxiliary shaft;

the output shaft is arranged in the box body, and the crankshaft, the auxiliary shaft and the output shaft are arranged in a triangular shape;

the crankshaft and the output shaft are arranged in front and at the back, and the auxiliary shaft is arranged above a central connecting line of the crankshaft and the output shaft;

the balance shaft is arranged in front of the crankshaft.

9. The engine of claim 8, further comprising:

the water pump body and the clutch are arranged on the right side of the engine, and the water pump is positioned on the front side of the box body;

the water pump shaft is arranged on the water pump body and used for driving an impeller on the water pump body to rotate;

the first gear is arranged on the water pump shaft;

a second gear is arranged on the balance shaft and is meshed with the first gear;

the balance shaft is further provided with a driven gear, the crankshaft is provided with a driving gear, the driving gear is meshed with the driven gear, and the second gear is located on the outer side of the driven gear.

10. A motorcycle, characterized in that the motorcycle comprises:

an engine as claimed in any one of claims 1 to 9.

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