CN218266053U - Engine and motorcycle - Google Patents

Abstract

An embodiment of the utility model provides an engine and motorcycle, the engine includes: a crankshaft; an oil pump, the center of which is located behind and below the center of the crankshaft; the crankshaft and the oil pump are arranged in the box body; the oil pump assembly comprises a box cover and a box body, wherein the box cover is connected with the box body to form a box assembly, the connecting surface of the box cover and the box body is a box assembly surface, a first line segment is formed by connecting the center of the oil pump and the center of a crankshaft, and an included angle a formed by the first line segment and a perpendicular line of the box assembly surface is smaller than 30 degrees; the technical problem that in an oil pump arrangement mode of the related art, an oil pump is arranged in the front lower portion of a crankshaft, the outline of an engine is increased, and the engine is not compact 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

Currently, engine oil of a motorcycle is sucked from an oil suction port at the bottom of an oil pan by an oil pump, is pressurized and then pumped to an oil filter through an introduction passage (oil passage) formed inside a crankcase, and is filtered and then flows to each part requiring lubrication. In the engine with two or more cylinders, the oil pump is arranged in front of and below the crankshaft, so that the profile of the engine is increased, and the engine is not compact.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problems, the present invention provides an engine and a motorcycle for solving the technical problems of the related art that the engine is not compact due to the increase of the profile of the engine when the oil pump is arranged in the front lower part of the crankshaft.

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, engine includes:

a crankshaft;

an oil pump having a center located rearward and below a center of the crankshaft;

the crankshaft and the oil pump are arranged in the box body;

the case lid, the case lid with the box is connected and is formed the case that closes, wherein, the case lid with the box is connected the face and is the face that closes the case, the center of oil pump and the line of the center of bent axle form first line segment, the contained angle a that first line segment and the perpendicular line of the face that closes the case formed is less than 30.

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

the crankshaft and the oil pump are arranged on the box body;

the box cover is connected with the box body to form a box closing surface, and the box cover and the box body are connected to form the box closing surface.

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

the bearing block is arranged on the box body;

a bearing mounted on the bearing, the crankshaft being mounted on the bearing.

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

the box body and the box cover are connected through the connecting piece, and one of the connecting pieces penetrates through the bearing seat.

In some embodiments of the present application, the oil pump is proximate to the connection through the bearing housing.

In some embodiments of the present application, the oil pump includes a suction port and a discharge port, wherein the suction port and the discharge port are located on both sides of the connection member passing through the bearing housing.

In some embodiments of the present application, the bearing housing comprises:

the right seat is arranged on the box body;

the middle seat is arranged on the box body;

the bearing includes:

the first bearing is arranged on the right seat, and the crankshaft is arranged on the first bearing;

a second bearing mounted on the mid-mount, the crankshaft being mounted on the second bearing.

The engine further includes:

the filter is connected with the oil pump and used for filtering the engine oil;

wherein the filter is located between the right seat and the middle seat.

In some embodiments of this application, be equipped with about the bent axle and run through the main oil gallery of box, the both ends of main oil gallery are equipped with the end cap, and the oil pump covers rather than the end cap with one side.

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

an output shaft, the crankshaft being located forward of the output shaft;

a countershaft located above a line connecting a center of the crankshaft and a center of the output shaft; the center of the crankshaft, the center of the auxiliary shaft and the center of the output shaft are mutually connected to form a triangle, and the connecting line of the center of the crankshaft and the center of the output shaft and the horizontal plane form a preset angle;

the gear shifting shaft is positioned below a connecting line of the center of the crankshaft and the center of the output shaft;

the balance shaft is arranged in front of the crankshaft; and

the water pump is arranged in front of the balance shaft, and a connecting line of the center of the water pump and the center of the auxiliary shaft is positioned above the crankshaft.

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

the first gear is arranged on the crankshaft;

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

a third gear intermeshed with the first gear and mounted on the countershaft;

the crankshaft drives the balance shaft through the first gear and the second gear, and the crankshaft drives the counter shaft through the first gear and the third gear;

the first chain wheel is arranged on the crankshaft;

the second chain wheel is connected with the first chain wheel through a chain and is used for being arranged on the camshaft;

the fourth gear is arranged on the balance shaft and is positioned on the right side of the second gear;

the fifth gear is meshed with the fourth gear, is arranged on the water pump and is used for driving the water pump to work by the balance shaft through the fourth gear; the balance shaft is placed at the front part of the engine;

a sixth gear mounted on the crankshaft;

a seventh gear engaged with the sixth gear and mounted on the oil pump;

wherein the crankshaft drives the oil pump through the sixth gear and the seventh gear; the first chain wheel is positioned between the first gear and the sixth gear, and the first chain wheel, the sixth gear and the first gear are positioned on the right side of the crankshaft;

the third gear and the fifth gear are both positioned above a connecting line of the center of the crankshaft and the center of the balance shaft, and the connecting line of the center of the third gear, the center of the fifth gear and the center of the seventh gear is arranged in an inverted triangle; and

and the engine oil filter is arranged below the water pump.

The utility model discloses an implementation still provides a motorcycle, the motorcycle includes as above-mentioned engine.

Compared with the prior art, the utility model discloses an embodiment's beneficial effect lies in:

an embodiment of the utility model provides an engine, the engine includes: the oil pump is positioned at the rear lower part of the center of the crankshaft in the embodiment, and an included angle a formed by the first line segment and a vertical line of the box closing surface is less than 30 degrees, so that the oil can be efficiently supplied to the structure of each friction pair, the outline of the engine is not required to be additionally increased, the water pump can be installed at an ideal position, the engine is miniaturized and the technical problem that the outline of the engine is not compact due to the fact that the oil pump is arranged at the front lower part of the crankshaft in a light-weight arrangement mode in the related technology is effectively solved, and the oil pump is arranged at the front lower part of the crankshaft, so that the outline of the engine is increased.

The embodiment of the utility model provides a motorcycle is still provided, the motorcycle adopt as above the engine, can solve the oil pump arrangement mode of correlation technique effectively, the oil pump is arranged in bent axle front lower place, can make the increase of engine profile, leads to the not compact technical problem of engine.

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 schematic diagram of a first structure of an engine according to an embodiment of the present invention;

fig. 2 is a second schematic structural diagram of an engine according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a third structure of an engine according to an embodiment of the present invention;

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

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

fig. 6 is a sixth schematic structural diagram of an engine according to an embodiment of the present invention;

fig. 7 is a seventh schematic structural diagram of an engine according to an embodiment of the present invention;

fig. 8 is an eighth schematic structural diagram of an engine according to an embodiment of the present invention;

fig. 9 is a ninth schematic structural diagram of an engine according to an embodiment of the present invention.

Wherein:

100. an output shaft; 200. a crankshaft; 300. a counter shaft; 400. a shift shaft; 500. a balance shaft; 600. a water pump; 700. an oil pump; 101. a first gear; 102. a first sprocket; 103. a sixth gear; 201. a second gear; 202. a fourth gear; 301. a third gear; 401. a fifth gear; 501. a seventh gear; 601. closing the box surface; 701. a box body; 800. a box cover; 900. a connecting member.

Detailed Description

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, and not all 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 the orientations or positional relationships shown in the drawings, and are only for convenience in describing the embodiments of the present application and simplifying the description, but do not indicate or imply that the referred devices or elements 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 the terms "mounted," "connected," and "connected" are used broadly and are defined as, for example, a fixed connection, an exchangeable connection, an integrated connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, and a communication between two elements, unless otherwise explicitly stated or limited. Specific meanings of the above terms in the embodiments of the present application can be understood as 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. 1-9, fig. 1 is a schematic structural diagram of an engine according to an embodiment of the present invention;

in the present embodiment, there is provided an engine including:

a crankshaft 200;

an oil pump 700, a center of which is located rearward and downward of a center of the crankshaft 200;

the box 701, the crankshaft 200 and the oil pump 700 are both arranged on the box 701;

the box cover 800, the box cover 800 with the box 701 is connected and is formed the box that closes, wherein, the case cover 800 with the box 701 is connected the face and is the box that closes 601, the center of oil pump and the line of the center of bent axle form first line segment, the first line segment with the contained angle a that the perpendicular line of box that closes formed is less than 30 (contained angle a of this embodiment is as contained angle A shown in fig. 8).

An embodiment of the utility model provides an engine, bent axle 200 converts the seesaw into rotational motion for the countershaft output of engine provides power under the effect of connecting rod, through bent axle 200 does the engine provides power, oil pump 700 sucks machine oil from the oil absorption mouth of the bottom of oil pan, pressurizes the back and send each position that needs lubrication on through the leading-in route of the inside formation of bent axle 200 case to, through in this embodiment the center of oil pump 700 is located the rear lower place at the center of bent axle 200, and the contained angle a that first line segment and the perpendicular line of close case face 601 formed is less than 30, can supply machine oil to the structure of each friction pair high-efficiently, need not additionally to increase the profile of engine, guarantees simultaneously that the water pump can install on ideal position, has realized the miniaturization and the lightweight of engine to in the oil pump 700 arrangement mode of having solved relevant art effectively, oil pump 700 arranges in bent axle 200 front lower place, can make the engine profile increase, leads to the not compact technical problem of engine.

The case body 701 and the case cover 800 are connected to form a mold assembly of the crankshaft 200, so that the crankshaft 200 and other components can be protected in the mold assembly, and a joint surface between the case cover 800 and the case body 701 is a mold assembly surface 601.

In the field of the existing motorcycles, functional improvement on the motorcycles reaches a certain bottleneck, and the motorcycles are light and flexible and have certain requirements on weight and volume space, so that the requirements on light weight and compactness of the motorcycles are derived;

in the motorcycle of the related art, the oil pump 700 is arranged at the rear lower part of the crankshaft 200, if the angle a between the first line segment, which is the connecting line of the center of the oil pump 700 and the center of the crankshaft 200, and the perpendicular line of the box closing surface 601 is larger than 30 degrees, the oil pump is driven by the crankshaft 200 or the auxiliary shaft, the length of the leading-in passage (oil passage) is lengthened, the time of engine oil reaching each lubricating part is increased, the engine cannot be effectively lubricated when being started, the friction resistance is high, and the friction pair is easy to wear; in this case, in order to increase the oiling speed, it is necessary to use the oil pump 700 having a larger size, but in this case, the size and weight of the entire engine increase due to the size increase of the oil pump 700;

the oil pump is arranged in front of and below the crankshaft 200, so that the profile of the engine is increased, the space for arranging the water pump is occupied, and the position of the water pump is occupied; in view of the requirement, the engine provided in this embodiment is configured such that the center of the oil pump 700 in this embodiment is located behind and below the center of the crankshaft 200, and the included angle a formed by the first line segment and the perpendicular line of the box assembling surface 601 is smaller than 30 °, so that the length of the introduction path is not increased, and the engine oil is delivered to each lubrication part for lubrication during the start of the engine without being replaced by the large-sized oil pump 700, thereby reducing the wear of friction pairs, improving the compactness of the engine, increasing the degree of the lightness, and promoting the lightness and compactness of the motorcycle; reserving the position of the front lower part of the crankshaft 200 to install a water supply pump, wherein the front part of the crankshaft 200 is used as an ideal arrangement position of an engine water pump; the distance between the cooling water jacket and the radiator is short, and the cooling water leading-in and leading-out channels are short, so that the miniaturization and the light weight of the engine are facilitated.

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

the bearing block is arranged on the box body 701;

a bearing mounted on the bearing, and the crankshaft 200 is mounted on the bearing.

The bearing seat is installed on the box body 701, and the installation mode of the bearing seat can be that the bearing seat is installed on the box body 701 through welding or bolt connection and the like, the bearing seat is provided with an installation hole, an outer ring of the bearing is inserted and installed on the installation hole, and the crankshaft 200 is inserted and installed on an inner ring of the bearing, so that the crankshaft 200 can rotate relative to the bearing seat, and then the box cover 800 covers the box body 701 to realize box closing; the bearing can be a roller bearing or a ball bearing;

in some embodiments of the present application, the bearing housing comprises:

a right seat mounted on the case 701;

the middle seat is arranged on the box body 701;

the bearing includes:

a first bearing mounted on the right seat, the crankshaft 200 being mounted on the first bearing;

a second bearing mounted on the intermediate seat, the crankshaft 200 being mounted on the second bearing.

The bearing seat may include at least a right seat and a middle seat, and may further include a left seat, so that the crankshaft 200 may be stably rotatably installed in the case 701, and in the process of forward and backward movement of the connecting rod, the crankshaft 200 is driven, and the crankshaft 200 may stably convert forward and backward movement power into rotational power.

The right seat and the middle seat are both mounted on the box body 701 through bolts, the outer ring of the first bearing is mounted on the right seat, and the right end of the crankshaft 200 is inserted and mounted on the inner ring of the first bearing; the outer ring of the second bearing is mounted on the middle seat, and the middle of the crankshaft 200 is inserted and mounted on the inner ring of the second bearing.

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

and the connecting pieces 900 are connected with the box body 701 and the box cover 800 through the connecting pieces 900, wherein one connecting piece 900 penetrates through the bearing seat.

The connecting member 900 is preferably a stud or a bolt, the case body 701 and the case cover 800 are fixed together by a plurality of bolts, and can be detached by bolts when detaching, corresponding threaded holes may be pre-arranged on the case cover 800 or the case body 701, and the case body 701 and the case cover 800 are assembled together by screwing the bolts into the threaded holes.

In some embodiments of the present application, the oil pump 700 is in close proximity to the connector 900 passing through the bearing housing.

The oil pump 700 is arranged at a position close to the connecting piece 900 penetrating through the bearing seat, so that the limited space of the engine can be reasonably utilized, and the compactness and the light weight of the engine are effectively improved.

In some embodiments of the present application, the oil pump 700 includes a suction port and a discharge port, wherein the suction port and the discharge port are located at both sides of the connection member 900 passing through the bearing housing.

The suction port is communicated with the bottom of the oil pan, and is used for pumping lubricating oil in the oil pan into the oil pump 700 when the oil pump 700 is started, pressurizing the lubricating oil in the oil pan 700, and discharging the lubricating oil from the discharge port to flow into each part needing lubrication; the suction port and the discharge port are positioned on both sides of the connecting piece 900 penetrating through the bearing seat, so that the space of the engine can be reasonably utilized to avoid the connecting piece 900, the suction port can be close to the oil pan, and the discharge port is close to a part needing lubrication.

In some embodiments of the present application, a main oil gallery penetrating through the box 701 from left to right is disposed under the crankshaft 200, plugs are disposed at two ends of the main oil gallery, and the oil pump 700 covers the plugs on the same side.

Through the position confession in the oil pump 700 sets up the end cap, can shield through oil pump 700 effectively the end cap, even if the oil leak takes place for the end cap simultaneously, it also only can leak into in the oil pump 700, still can keep comparatively safe clean and tidy engine.

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

an output shaft 100;

a crankshaft 200, the crankshaft 200 being located in front of the output shaft 100; and

a counter shaft 300, the counter shaft 300 being located above a line connecting the center of the crankshaft 200 and the center of the output shaft 100;

wherein the center of the crankshaft 200, the center of the counter shaft 300, and the center of the output shaft 100 are connected to each other to form a triangle.

In the engine of the present embodiment, since the center of the secondary shaft 300 and the center of the output shaft 100 are connected to each other to form a triangle, that is, the center of the crankshaft 200, the center of the secondary shaft 300 and the center of the output shaft 100 are three vertexes of the triangle, so that the secondary shaft 300 is not on the same straight line of the crankshaft 200 and the output shaft 100, and the distance between the crankshaft 200 and the output shaft 100 is effectively shortened, so that the engine can reduce the width space for being on the same straight line, the engine is more compact, the degree of weight reduction is higher, and the motorcycle is promoted to be lightened and compacted.

In the field of the existing motorcycle, functional improvement of the motorcycle is improved to a certain bottleneck, the motorcycle is light and flexible, and certain requirements are also made on the weight and the volume space of the motorcycle, so that the requirement for light weight and compactness of the motorcycle is derived, and the engine provided by the embodiment has the advantages that the center of the crankshaft 200, the center of the auxiliary shaft 300 and the center of the output shaft 100 are connected with each other to form a triangle, so that the compactness of the engine is better, the lightweight degree is higher, and the light weight and the compactness of the motorcycle are promoted.

The crankshaft 200 is connected to a connecting rod, the crankshaft 200 is connected to the countershaft 300 through a gear, and is used for transmitting power to the countershaft 300, and the countershaft 300 is used for transmission gear shifting.

The countershaft 300 is connected with the output shaft 100 through a gear, the countershaft 300 is used for driving the output shaft 100 to rotate, and the output shaft 100 drives the rear wheel to rotate so as to drive the vehicle to run.

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

and a shift shaft 400, wherein the shift shaft 400 is located below a line connecting the center of the crankshaft 200 and the center of the output shaft 100.

Because the auxiliary shaft 300 is located above the center connecting line between the crankshaft 200 and the output shaft 100, more space can be reserved for the shift shaft 400, so that the shift shaft 400 can be arranged below the connecting line between the center of the crankshaft 200 and the center of the output shaft 100, and the arrangement of the position of the shift shaft 400 can facilitate the installation of a shift structure, reduce the distance of connecting rods of the shift mechanism, adapt to the use of different functional vehicle types, and make the shift mechanism more simple and beautiful when viewed from the outside of an engine.

The gear shifting mechanism is used for adjusting gears on the countershaft 300 and the output shaft 100 to realize the switching of different gears N-1-2-3-4-5-6 to adjust different transmission ratios.

In some embodiments of the present application, a line connecting the center of the crankshaft 200 and the center of the output shaft 100 is disposed at a predetermined angle with respect to a horizontal plane.

The preset angle may be 2 to 60 degrees, and the preset angle allows the crankshaft 200 and the output shaft 100 to be more compact by setting the preset angle, thereby reducing the height of the engine, and effectively reducing the size of the engine in length and height by locating the auxiliary shaft 300 above the line connecting the center of the crankshaft 200 and the center of the output shaft 100.

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

and a balance shaft 500, the balance shaft 500 being provided in front of the crankshaft 200.

Since no other mechanism can be disposed at a position in front of the crankshaft 200, the arrangement position of the balance shaft 500 at the position in front of the crankshaft 200 does not affect the overall size of the engine, and the compactness of the engine can be further improved.

The crankshaft 200 is connected to the balance shaft 500 through a gear and drives the balance shaft 500, and the balance shaft 500 serves to reduce dynamic mechanical vibration.

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

and a water pump 600, wherein the water pump 600 is disposed in front of the balance shaft 500, and a connection line between the center of the water pump 600 and the center of the auxiliary shaft 300 is located above the crankshaft 200.

The water pump 600 is used for driving cooling liquid to cool the engine; the water pump 600 is arranged in front of the balance shaft 500, so that the total designed length of a pipeline of cooling liquid is reduced, the engine can be cooled directly, the material of the pipeline is saved, the pipeline is reduced, the compactness is realized, and the water cooling performance and the emission of the engine are improved.

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

a filter connected to the oil pump 700 for filtering the engine oil;

wherein the filter is located between the right seat and the middle seat and is arranged below the water pump.

The engine oil pumped by the oil pump 700 is filtered by a filter and then discharged to each position needing lubrication through a discharge port, so that the lubrication effect is realized.

The center of the oil pump 700 is located rearward and downward of the crankshaft 200.

The oil pump 700 is closest to the filter and the oil supply point (the crankshaft 200 and the balance shaft 500), and the required conveying pipeline is short, so that the engine can be increased in compactness, and the lubricating effect of the crankshaft 200 and the balance shaft 500 in the engine can be better.

The oil pump 700 is disposed behind and below the crankshaft 200, and since the counter shaft 300 is located above a line connecting the center of the crankshaft 200 and the center of the output shaft 100, the oil pump 700 does not obstruct the arrangement of the primary gears on the counter shaft 300, so that the width of the engine is not increased, and the engine is further compact.

The crankshaft 200 drives the umbrella blade of the oil pump 700, so that the crankshaft 200 can drive the pair of oil pumps 700 to work.

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

a first gear 101, the first gear 101 being mounted on the crankshaft 200;

a second gear 201, wherein the second gear 201 is engaged with the first gear 101, and the second gear 201 is mounted on the balance shaft 500;

a third gear 301, the third gear 301 being intermeshed with the first gear 101, and the third gear 301 being mounted on the countershaft 300;

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

The power of the crankshaft 200 drives the countershaft 300 through the first gear 101 and the third gear 301, and the countershaft 300 transmits the power to the engine output shaft 100 to drive the vehicle; the transmission system of the embodiment cancels a special gear on the crankshaft 200 for transmission with the balance shaft 500, and transmits power to the balance shaft 500 through the second gear 201 and the auxiliary shaft 300 through the third gear 301 through the first gear 101, so that the engine can be more compact in width and can retract inwards from the left side of the engine, the occupied space of the engine in width is reduced, and the compactness and the light weight of the engine are improved.

The first gear 101 is attached to the crankshaft 200 by welding, spline coupling, or the like, the second gear 201 is attached to the balance shaft 500 by welding, spline coupling, or the like, and the third gear 301 is attached to the counter shaft 300 by welding, spline coupling, or the like.

The crank-link mechanism with the piston reciprocating motion converted into the rotary motion outputs the rotary power through the crankshaft 200, wherein the first gear 101, the second gear 201 and the third gear 301 form a first layer transmission pair in a coplanar manner and are all positioned on the right side of the engine, namely positioned on the right side of the crankshaft 200, the countershaft 300 and the balance shaft 500, wherein the clutch is arranged in the middle and on the left side of the countershaft 300, and the first gear 101, the second gear 201 and the third gear 301 are arranged on the right side of the clutch in a transmission manner, so that a space for avoiding the clutch is not required to be additionally configured due to the need of assembling the gear pair, the height of the clutch side is effectively controlled to be minimized, and the compactness and the light weight of the engine are further improved.

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

a first sprocket 102 mounted on the crankshaft 200;

the second chain wheel is connected with the first chain wheel 102 through a chain and is used for being arranged on a camshaft;

a fourth gear 202 mounted on the balance shaft 500 and located at the right side of the second gear 201;

a fifth gear 401, which is engaged with the fourth gear 202, is mounted on the water pump 600, and is used for driving the water pump 600 to work through the fourth gear 202 by the balance shaft 500;

in which the balance shaft 500 is placed at the front of the engine.

The first chain wheel 102 is welded or mounted on the crankshaft 200 in a spline connection manner; the first chain wheel 102 is driven to rotate by the crankshaft 200, the second chain wheel is mounted on a camshaft by welding or spline connection and the like, and the first chain wheel 102 and the second chain wheel are driven by a chain, wherein the first chain wheel 102 is arranged at the position of the first gear 101, a chain cavity is slightly outside, the man-machine is not influenced, the position above the right side of the auxiliary shaft 300 can be utilized for setting, and the compactness of the engine can be effectively improved.

The fourth gear 202 is mounted on the balance shaft 500 by welding or spline connection, and rotates with the balance shaft 500; the fifth gear 401 is mounted on the rotating shaft of the water pump 600 through welding or spline connection and the like, and is used for driving the impeller of the water pump 600 to rotate, the fourth gear 202 is located on the right side of the second gear 201, the balance shaft 500 is placed in the front of the engine, and the fifth gear 401 is driven by the fourth gear 202 arranged on the right upper end of the balance shaft 500 to drive the water pump 600 to work.

The first sprocket 102, the fourth gear 202, and the fifth gear 401 are all located within a preset range, that is, the first sprocket 102, the fourth gear 202, and the fifth gear 401 do not interfere with each other in height, and may be set within the preset range such that the first sprocket 102, the fourth gear 202, and the fifth gear 401 form a second layer, which is adjacent to the first layer.

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

a sixth gear 103 mounted on the crankshaft 200;

a seventh gear 501 engaged with the sixth gear 103 and mounted on the oil pump 700;

wherein the crankshaft 200 drives the oil pump 700 through the sixth gear 103 and the seventh gear 501; the first chain wheel is positioned between the first gear and the sixth gear, and the first chain wheel, the sixth gear and the third gear are positioned on the right side of the crankshaft;

the third gear and the fifth gear are both positioned above a connecting line of the center of the crankshaft and the center of the balance shaft, and the connecting line of the center of the third gear, the center of the fifth gear and the center of the seventh gear is in an inverted triangle shape.

The sixth gear 103 is mounted on the crankshaft 200 by welding or spline connection, and rotates with the crankshaft 200, the seventh gear 501 is mounted on the rotating shaft of the oil pump by welding or spline, and is used for driving the rotating shaft of the oil pump to drive the oil pump to rotate, so as to drive the oil pump to work, wherein the seventh gear 501 is mounted on the outermost side of the crankshaft 200 and is located in the skirt of the oil pump, so that the height of the engine cannot be increased, and the positions of the sixth gear 103 and the seventh gear 501 of the oil pump and the oil pump can be configured more reasonably, wherein the oil pump 700 and the water pump 600 do not need to be arranged behind the crankshaft 200, so that the distance from the crankshaft 200 to the auxiliary shaft 300 is shortened, and the engine is compact in the front-rear direction; wherein the sixth gear 103 and the seventh gear 501 form a third layer.

The first gear 101, the first chain wheel 102 and the sixth gear 103 are arranged from left to right and are located near one end of the right side of the crankshaft 200, and on the premise that the first layer, the second layer and the third layer are arranged in a layered mode, the internal portion of the engine is reasonably arranged, all the gears are located within the height profile of the clutch, and adjustment on the height of the engine is not needed.

The third gear 301 and the fifth gear 401 are both located above a connecting line of the center of the crankshaft 200 and the center of the balance shaft 500, and a connecting line of the center of the third gear 301, the center of the fifth gear 401 and the center of the seventh gear 501 is in an inverted triangle.

Through the arrangement mode, the lower part of the right side of the engine can be further ensured to have a recombination space, the space for arranging a brake and a pedal is facilitated, and the operation of an operator is facilitated.

The transmission system of the embodiment can realize the compactness of the left and right directions and the front and back directions of the engine; the adaptability to various types of finished vehicles is good; the engine is symmetrical left and right, so that the whole vehicle is convenient to arrange; the engine is light, and the engine is favorable for operability, dynamic property, economy and emission performance of the vehicle; and the engine adopts common technology or structure, and the cost is low.

The utility model also provides a motorcycle, which comprises the engine;

the motorcycle adopts the engine, and the technical problem that in the arrangement mode of the oil pump 700 in the related art, the oil pump 700 is arranged in the front lower part of the crankshaft 200, so that the outline of the engine is increased, and the engine is not compact can be effectively solved.

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 crankshaft;

an oil pump having a center located rearward and below a center of the crankshaft;

the crankshaft and the oil pump are arranged in the box body;

the oil pump comprises a box cover, wherein the box cover is connected with the box body to form a box combination, the box cover and a box body connecting surface are box combination surfaces, a first line segment is formed by connecting the center of the oil pump and the center of the crankshaft, and an included angle a formed by the first line segment and a perpendicular line of the box combination surfaces is smaller than 30 degrees.

2. The engine of claim 1, further comprising:

the bearing block is arranged on the box body;

the bearing is arranged on the bearing seat, and the crankshaft is arranged on the bearing.

3. The engine of claim 2, further comprising:

the box body and the box cover are connected through the connecting piece, and one of the connecting pieces penetrates through the bearing seat.

4. The engine of claim 3, characterized in that said oil pump is in close proximity to said connection through said bearing housing.

5. The engine of claim 3, characterized in that the oil pump includes a suction port and a discharge port, wherein the suction port and the discharge port are located on both sides of the connection through the bearing housing.

6. The engine of claim 2, wherein the bearing housing comprises:

the right seat is arranged in the box body;

the middle seat is arranged on the box body;

the bearing includes:

the first bearing is arranged on the right seat, and the crankshaft is arranged on the first bearing;

a second bearing mounted on the mid-mount, the crankshaft being mounted on the second bearing.

7. The engine according to claim 1, characterized in that a main oil gallery penetrating through the box body from left to right is arranged right below the crankshaft, plugs are arranged at two ends of the main oil gallery, and the plugs on the same side of the main oil gallery are covered by the oil pump.

8. The engine of claim 6, comprising:

an output shaft, the crankshaft being located forward of the output shaft;

a countershaft located above a line connecting a center of the crankshaft and a center of the output shaft; the center of the crankshaft, the center of the auxiliary shaft and the center of the output shaft are mutually connected to form a triangle, and the connecting line of the center of the crankshaft and the center of the output shaft and the horizontal plane form a preset angle;

the gear shifting shaft is positioned below a connecting line of the center of the crankshaft and the center of the output shaft;

the balance shaft is arranged in front of the crankshaft;

the water pump is arranged in front of the balance shaft, and a connecting line of the center of the water pump and the center of the auxiliary shaft is positioned above the crankshaft; and

the filter is connected with the oil pump and used for filtering engine oil;

wherein a center line of the filter is located between the right seat and the middle seat and is disposed below the water pump.

9. The engine of claim 8, further comprising:

the first gear is arranged on the crankshaft;

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

a third gear intermeshed with the first gear and mounted on the countershaft;

the crankshaft drives the balance shaft through the first gear and the second gear, and the crankshaft drives the counter shaft through the first gear and the third gear;

the first chain wheel is arranged on the crankshaft;

the second chain wheel is connected with the first chain wheel through a chain and is used for being arranged on the camshaft;

the fourth gear is arranged on the balance shaft and is positioned on the right side of the second gear;

the fifth gear is meshed with the fourth gear, is arranged on the water pump and is used for driving the water pump to work by the balance shaft through the fourth gear; the balance shaft is placed at the front part of the engine;

a sixth gear mounted on the crankshaft; and

a seventh gear engaged with the sixth gear and mounted on the oil pump;

wherein the crankshaft drives the oil pump through the sixth gear and the seventh gear; the first chain wheel is positioned between the first gear and the sixth gear, and the first chain wheel, the sixth gear and the third gear are positioned on the right side of the crankshaft;

the third gear and the fifth gear are both positioned above a connecting line of the center of the crankshaft and the center of the balance shaft, and the connecting line of the center of the third gear, the center of the fifth gear and the center of the seventh gear is in an inverted triangle shape.

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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