CN220539703U - Engine and motorcycle - Google Patents

Abstract

The utility model discloses an engine and a motorcycle, and relates to the technical field of engines. The engine comprises a box body structure, a crankshaft, a balance shaft, a main oil pump and an auxiliary oil pump, wherein the box body structure is provided with an oil supply cavity and an oil return cavity which are mutually isolated, the crankshaft and the balance shaft are arranged on the box body structure, and the crankshaft is in transmission connection with the balance shaft; the main oil pump and the auxiliary oil pump are both arranged on the box body structure, the main oil pump is used for pumping the oil in the oil supply cavity into a main oil way of the engine, the auxiliary oil pump is used for pumping the oil in the oil return cavity into the oil supply cavity, the main oil pump is provided with a first driving shaft, the auxiliary oil pump is provided with a second driving shaft, and the first driving shaft is in transmission connection with the balance shaft through the second driving shaft. The engine provided by the utility model has a more compact structure.

Description

Engine and motorcycle

Technical Field

The utility model relates to the technical field of engines, in particular to an engine and a motorcycle.

Background

The engine of the motorcycle is provided with a main oil pump and an auxiliary oil pump, wherein the main oil pump is used for pumping the oil in the oil supply cavity into a main oil way of the engine so as to lubricate all parts. The auxiliary oil pump is used for pumping the oil in the oil return cavity into the oil supply cavity so as to supplement the engine oil in the oil supply cavity.

At present, a main oil pump and an auxiliary oil pump of a motorcycle engine on the market are respectively connected with a crankshaft through transmission mechanisms which are respectively arranged, and the two groups of transmission mechanisms occupy excessive space and cause the mechanism of the engine to be not compact.

Disclosure of Invention

The utility model aims to provide an engine, which has the characteristic of more compact structure.

Another object of the present utility model is to provide a motorcycle which has a more compact structure.

The embodiment of the utility model provides a technical scheme that:

the engine comprises a box body structure, a crankshaft, a balance shaft, a main oil pump and an auxiliary oil pump, wherein the box body structure is provided with an oil supply cavity and an oil return cavity which are isolated from each other, the crankshaft and the balance shaft are arranged on the box body structure, and the crankshaft is in transmission connection with the balance shaft;

the main oil pump and the auxiliary oil pump are both arranged on the box body structure, the main oil pump is used for pumping the oil in the oil supply cavity into a main oil way of the engine, the auxiliary oil pump is used for pumping the oil in the oil return cavity into the oil supply cavity, the main oil pump is provided with a first driving shaft, the auxiliary oil pump is provided with a second driving shaft, and the first driving shaft is in transmission connection with the balance shaft through the second driving shaft.

Further, a driving sprocket is coaxially arranged on the balance shaft, a driven sprocket is coaxially arranged on the second driving shaft, and the engine further comprises a transmission chain, and the driving sprocket is connected with the driven sprocket through the transmission chain.

Further, one end of the first driving shaft is coaxially provided with a first flat square pin, one end of the second driving shaft is correspondingly and coaxially provided with a first flat square hole, and the first flat square pin is spliced with the first flat square hole.

Further, a driving gear is coaxially arranged on the crankshaft, a driven gear is coaxially arranged on the balance shaft, and the driving gear is meshed with the driven gear.

Further, the main oil pump is disposed on the left side of the tank structure, the sub oil pump is disposed on the right side of the tank structure, and the balance shaft extends in the left-right direction.

Further, the engine further comprises a water pump, the water pump is arranged on the box body structure, a third driving shaft connected with the internal impeller is arranged on the water pump, and the third driving shaft is in transmission connection with the balance shaft.

Further, the box structure comprises a lower box body, a left cover and a right cover, wherein the crankshaft and the balance shaft are arranged on the lower box body, and the left cover and the right cover are respectively arranged on the left side and the right side of the lower box body;

the main oil pump is arranged in a cavity enclosed by the left cover and the lower box body, and the auxiliary oil pump and the water pump are arranged in a cavity enclosed by the right cover and the lower box body.

Further, one end of the balance shaft is coaxially provided with a second flat square pin, one end of the third driving shaft is correspondingly and coaxially provided with a second flat square hole, and the second flat square pin is spliced with the second flat square hole.

Further, a play gap is formed between one end of the balance shaft, at which the second flat square pin is arranged, and one end of the third driving shaft, at which the second flat square hole is arranged.

The embodiment of the utility model also provides a motorcycle, which comprises the engine, wherein the engine comprises a box body structure, a crankshaft, a balance shaft, a main oil pump and an auxiliary oil pump, the box body structure is provided with an oil supply cavity and an oil return cavity which are mutually isolated, the crankshaft and the balance shaft are arranged on the box body structure, and the crankshaft is in transmission connection with the balance shaft; the main oil pump and the auxiliary oil pump are both arranged on the box body structure, the main oil pump is used for pumping the oil in the oil supply cavity into a main oil way of the engine, the auxiliary oil pump is used for pumping the oil in the oil return cavity into the oil supply cavity, the main oil pump is provided with a first driving shaft, the auxiliary oil pump is provided with a second driving shaft, and the first driving shaft is in transmission connection with the balance shaft through the second driving shaft.

Compared with the prior art, the engine provided by the utility model has the advantages that the first driving shaft of the main oil pump is in transmission connection with the balance shaft through the second driving shaft of the auxiliary oil pump, which is equivalent to the fact that the first driving shaft and the balance shaft share the same transmission mechanism, so that less installation space is occupied, and the structural compactness of the engine is improved. Therefore, the beneficial effects of the engine provided by the utility model include: the structure is more compact.

Drawings

In order to more clearly illustrate the technical solution of the embodiments of the present utility model, the drawings that are required to be used in the embodiments will be briefly described. It is appreciated that the following drawings depict only certain embodiments of the utility model and are therefore not to be considered limiting of its scope. Other relevant drawings may be made by those of ordinary skill in the art without undue burden from these drawings.

FIG. 1 is a first cross-sectional schematic view of an engine portion structure provided by an embodiment of the present utility model;

fig. 2 is a schematic structural view of an engine part structure provided in an embodiment of the present utility model at a first view angle;

FIG. 3 is a schematic view of the structure of the lower case;

fig. 4 is a schematic structural view of an oil pan;

FIG. 5 is a second cross-sectional schematic view of an engine section structure provided by an embodiment of the present utility model;

fig. 6 is a schematic structural view of an engine part structure provided in an embodiment of the present utility model at a second view angle;

FIG. 7 is a third cross-sectional schematic view of an engine section structure provided by an embodiment of the present utility model;

FIG. 8 is a schematic cross-sectional view of a portion of an engine structure provided in an embodiment of the present utility model when connected to an oil cooler;

fig. 9 is a schematic structural view of an engine part structure at a third view angle according to an embodiment of the present utility model;

FIG. 10 is a fourth cross-sectional schematic view of an engine section structure provided by an embodiment of the present utility model;

FIG. 11 is a schematic view of the structure of an engine oil filter;

FIG. 12 is a schematic view of the structure of the left cover;

fig. 13 is a schematic view of an engine part structure at a fourth view angle according to an embodiment of the present utility model;

FIG. 14 is an enlarged schematic view of area A of FIG. 5;

fig. 15 is an enlarged schematic view of the area B in fig. 5.

Icon: 10-an engine; 100-box structure; 110-lower box body; 111-crank chamber; 1111-a crankshaft mounting portion; 1112-balance shaft mounting portion; 112-a first skirt; 1121-a first partition rib; 113-a sub oil pump mounting part; 1131-an oil outlet cavity; 1141-a first channel; 1142-a second channel; 115-top wall; 1151-a third barrel; 1152-a fourth barrel; 1153-an oil injection port; 1155-reinforcing bars; 1156-a fifth cylinder; 116-main oil pump mounting; 1161-oil inlet chamber; 117-fourth channel; 120-an oil pan; 121-a second skirt; 1211-a second partition rib; 122-a first leg channel; 123-a second leg channel; 1231-an internally threaded mounting portion; 124-a third leg channel; 125-a bottom wall; 1251-a first cylinder; 1252-a second cylinder; 1253-sixth cylinder; 1254-fourth leg passage; 1255-fifth leg passage; 1256-limit bump; 126-mounting channels; 130-an oil return cavity; 140-an oil supply cavity; 141-a filler neck; 142-exhaust port; 150-a first interface; 151-a first closure; 160-a second interface; 161-a second closure; 170-left cover; 171-oil adding cavity; 172-an oil rule; 173-overflow notch; 174-overflow channel; 200-crank shaft; 210-a drive gear; 300-balance shaft; 310-driven gear; 320-a drive sprocket; 330-a second flat square pin; 400-main oil pump; 410-a first drive shaft; 411-first flat square pins; 500-secondary oil pump; 510-a second drive shaft; 511-driven sprocket; 512-a first flat square hole; 600-third block piece; 700-an engine oil filter; 710—a first seal; 720-a second seal; 800-a transmission chain; 910-a water pump; 911-a third drive shaft; 912-a second flat square hole; 913-play gap; 920-right cover; 930-oil cooler.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present utility model more clear, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It will be apparent that the described embodiments are some, but not all, embodiments of the utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "left", "right", etc. are based on the directions or positional relationships shown in the drawings, or the directions or positional relationships conventionally put in place when the inventive product is used, or the directions or positional relationships conventionally understood by those skilled in the art are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific direction, be configured and operated in a specific direction, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, terms such as "disposed," "connected," and the like are to be construed broadly, and for example, "connected" may be either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

The following describes specific embodiments of the present utility model in detail with reference to the drawings.

Examples

Referring to FIG. 1, FIG. 1 is a schematic cross-sectional view of a portion of an engine 10 according to the present embodiment.

The engine 10 provided in this embodiment includes a box structure 100, where the box structure 100 includes a lower box 110 and an oil pan 120, a crank cavity 111 is provided at a top end of the lower box 110, a bottom end of the lower box 110 is connected with the oil pan 120 and encloses an oil return cavity 130 and an oil supply cavity 140 that are isolated from each other, the oil return cavity 130 is located at a front end of the lower box 110, the oil supply cavity 140 is located at a rear end of the lower box 110, and a top of the oil return cavity 130 is communicated with a bottom of the crank cavity 111.

Compared with the prior art in which the oil supply cavity 140 wraps the oil return cavity 130, in this embodiment, the oil return cavity 130 and the oil supply cavity 140 are sequentially arranged in the front-rear direction, the oil return cavity 130 is not wrapped by the oil supply cavity 140, and the oil return cavity 130 is not blocked by the oil supply cavity 140 in the process of arranging and maintaining the oil path inside the oil return cavity 130, so that the method is more convenient and quick.

Referring now to FIG. 2 in conjunction with the drawings, FIG. 2 is a schematic illustration of a portion of the engine 10 at a first viewing angle.

The engine 10 provided in this embodiment further includes a crankshaft 200 and a balance shaft 300, wherein a crankshaft mounting portion 1111 and a balance shaft mounting portion 1112 are provided on a cavity wall of the crankshaft cavity 111, respectively, the crankshaft mounting portion 1111 and the balance shaft mounting portion 1112 are arranged at intervals in the front-rear direction, the crankshaft 200 is mounted on the crankshaft mounting portion 1111, and the balance shaft 300 is mounted on the balance shaft mounting portion 1112.

The oil return chamber 130 is used for recovering the oil in the crank chamber 111, and in order to improve the oil return efficiency of the oil, in the present embodiment, the oil return chamber 130 is located between the crank mounting portion 1111 and the balance shaft mounting portion 1112 in the front-rear direction.

In practical application, the crankshaft 200 and the balance shaft 300 are reversed, and the engine oil thrown out by the crankshaft 200 and the balance shaft 300 is close to each other under the action of inertia and gravity and falls in the area where the bottom wall 125 of the crankshaft cavity 111 is communicated with the oil return cavity 130, so that the flow path of the engine oil thrown out by the crankshaft 200 and the balance shaft 300 is greatly shortened and quickly enters the oil return cavity 130.

With continued reference to fig. 1, in order to further improve the recovery efficiency of the engine oil in the crank chamber 111, in this embodiment, the inner surface of the bottom wall 125 of the crank chamber 111 is disposed obliquely in the front-rear direction, and the lower end of the bottom wall 125 of the crank chamber 111 in the vertical direction is communicated with the oil return chamber 130.

The inner surface of the bottom wall 125 of the crank chamber 111 plays a role in guiding the engine oil in the crank chamber 111, and in practical application, the engine oil in the bottom wall 125 of the crank chamber 111 flows to a lower end in the vertical direction under the action of gravity, so that the engine oil quickly flows back into the oil return chamber 130.

Referring to fig. 3 and fig. 4 in combination, fig. 3 is a schematic structural diagram of the lower case 110, and fig. 4 is a schematic structural diagram of the oil pan 120.

The bottom periphery of the lower case 110 is provided with a first skirt 112 in a surrounding area of the first skirt 112, and a first partition rib 1121 is provided. The periphery of the oil pan 120 is annularly provided with a second skirt edge 121, and a second partition rib 1211 is arranged in an area surrounded by the second skirt edge 121; first skirt 112 and second skirt 121 are snapped together to form a total chamber, and first partition rib 1121 interfaces with second partition rib 1211 to divide the total chamber into oil return chamber 130 and oil supply chamber 140.

It will be appreciated that, in the actual assembly process, when the oil pan 120 is assembled on the lower case 110, only the second skirt 121 needs to be aligned with and buckled with the first skirt 112, and in the buckled state, the first partition rib 1121 and the second partition rib 1211 are abutted together, and then connection is established. The first partition rib 1121 and the second partition rib 1211 jointly partition the space enclosed by the first skirt edge 112 and the second skirt edge 121 into the oil return cavity 130 and the oil supply cavity 140, so as to ensure that the oil return cavity 130 is not communicated with the oil supply cavity 140.

Referring now to FIG. 5 in combination, FIG. 5 is a second cross-sectional schematic illustration of a portion of the engine 10 provided in accordance with the present embodiment.

The engine 10 further includes a main oil pump 400 and a sub oil pump 500, the main oil pump 400 and the sub oil pump 500 being respectively disposed on left and right sides of a front end of the lower case 110, the main oil pump 400 being for pumping oil in the oil supply chamber 140 into a main oil passage of the engine 10, and the sub oil pump 500 being for pumping oil in the oil return chamber 130 into the oil supply chamber 140, in order to promote compactness of the overall structure.

In order to further simplify the structure and improve the compactness of the structure, in this embodiment, an additional oil delivery pipeline is omitted, an oil suction channel and an oil supplementing channel are formed in the box structure 100, an oil inlet end of the main oil pump 400 is communicated with one end of the oil suction channel, and the other end of the oil suction channel is communicated with the bottom end of the oil supply cavity 140; the oil outlet end of the sub oil pump 500 communicates with one end of the oil supplementing passage, and the other end of the oil supplementing passage communicates with the top end of the oil supply chamber 140.

In practical application, when the main oil pump 400 is operated, the oil inlet end thereof sucks the engine oil in the oil supply chamber 140 through the oil suction passage, and the sucked engine oil is pumped into the main oil passage of the engine 10 through the oil outlet end thereof. When the sub-oil pump 500 is operated, the oil inlet end of the sub-oil pump sucks the engine oil in the oil return cavity 130, and the sucked engine oil is pumped into the oil supplementing channel through the oil outlet end of the sub-oil pump, and then is sent into the oil supply cavity 140 through the oil supplementing channel. It can be seen that the engine 10 provided in this embodiment has the oil suction channel and the oil supply channel directly formed on the box structure 100, and the additional oil delivery pipeline is omitted, so that the overall structure is further simplified.

Referring to fig. 6 and fig. 7 in combination, fig. 6 is a schematic structural diagram of a part of the engine 10 according to the present embodiment at a second view angle, and fig. 7 is a third schematic sectional view of the part of the engine 10.

In the present embodiment, the tank structure 100 is provided with a sub-oil pump mounting portion 113 for mounting the sub-oil pump 500, and specifically, the sub-oil pump mounting portion 113 is provided on the lower tank 110. The sub-oil pump mounting portion 113 has an oil outlet cavity 1131 corresponding to the oil outlet end of the sub-oil pump 500, one end of the oil supplementing passage communicates with the oil outlet cavity 1131, and the other end of the oil supplementing passage communicates with the oil supply cavity 140.

Specifically, the lower casing 110 is provided with a first channel 1141 and a second channel 1142, and the oil pan 120 is provided with a third channel, and two ends of the third channel are respectively communicated with one end of the first channel 1141 and one end of the second channel 1142, so as to form an oil supplementing channel together. One end of the first channel 1141, which is far from the third channel, communicates with the oil outlet cavity 1131, and one end of the second channel 1142, which is far from the third channel, communicates with the oil supply cavity 140.

During operation of the sub-oil pump 500, the oil inlet end sucks the oil in the oil return chamber 130, and pumps the oil into a first channel 1141 provided on the lower case 110 through the oil outlet end, the oil flows into a third channel provided on the oil pan 120 along the first channel 1141, flows into a second channel 1142 provided on the lower case 110 through the third channel, and finally flows into the oil supply chamber 140 through the second channel 1142, thereby completing oil transfer of the oil return chamber 130 to the oil supply chamber 140.

The oil pan 120 is provided with a first branch section channel 122, a second branch section channel 123 and a third branch section channel 124 which form a third channel, two ends of the second branch section channel 123 are respectively connected with one end of the first branch section channel 122 and one end of the third branch section channel 124 in an included angle, one end of the first branch section channel 122 far away from the second branch section channel 123 is communicated with the first channel 1141, and one end of the third branch section channel 124 far away from the second branch section channel 123 is communicated with the second channel 1142.

Referring to fig. 4 in combination, specifically, the oil pan 120 includes a bottom wall 125, a first cylinder 1251 and a second cylinder 1252 protruding from an inner surface of the bottom wall 125, the first cylinder 1251 is located in the oil return chamber 130, the second cylinder 1252 is located in the oil supply chamber 140, top ends of the first cylinder 1251 and the second cylinder 1252 are connected to the lower case 110, the first cylinder 1251 encloses the first branch channel 122, the second branch channel 123 is disposed in the bottom wall 125, and the second cylinder 1252 encloses the third branch channel 124.

In practice, the sub-oil pump mounting portion 113 is disposed above the oil return chamber 130, the first cylinder 1251 and the second cylinder 1252 extend substantially in the vertical direction, and the bottom ends of the first cylinder 1251 and the second cylinder 1252 are both in communication with the second branch passage 123 provided in the bottom wall 125 of the oil pan 120, thereby constituting a third passage. The top end of the first cylinder 1251 is connected with the lower box 110 to realize the communication between the first branch section channel 122 and the first channel 1141; the top end of the second cylinder 1252 is connected to the lower housing 110 to communicate the third branch section passage 124 with the second passage 1142.

It is considered that in some special application scenarios, the external oil cooler 930 is required to cool engine oil. In order to facilitate the external connection of the oil cooler 930, in this embodiment, a first interface 150 and a second interface 160 are provided on the tank structure 100, the first interface 150 and the second interface 160 are both communicated with the oil supplementing channel, the first interface 150 and the second interface 160 are used for accessing the oil cooler 930, the first interface 150 is detachably provided with a first blocking member 151, and the second interface 160 is detachably provided with a second blocking member 161.

It can be appreciated that, in a normal application scenario, when the oil cooler 930 is not required to be connected to cool engine oil, the first interface 150 is blocked by the first blocking member 151, and the second interface 160 is blocked by the second blocking member 161, so as to ensure that engine oil is not leaked in the process of being conveyed from the oil return cavity 130 to the oil supply cavity 140. When the external oil cooler 930 is needed to cool the engine oil, the first blocking piece 151 and the second blocking piece 161 are detached, so that the engine oil in the oil supplementing channel can be connected to the oil cooler 930, and the engine oil can enter the oil supplying cavity 140 after being cooled by the oil cooler 930.

In this embodiment, the first interface 150 and the second interface 160 are both opened on the oil pan 120, and the first interface 150 and the second interface 160 are both communicated with the third channel. Specifically, the end of the second branch section channel 123 connected to the first branch section channel 122 is coaxially communicated with the first interface 150, and the end of the second branch section channel 123 connected to the third branch section channel 124 is coaxially communicated with the second interface 160.

It is understood that the first port 150 is upstream of the second port 160 in the flow direction of the oil. In other words, when the oil is introduced into the oil cooler 930, the oil in the oil compensating passage flows into the oil cooler 930 through the first port 150, is cooled by the oil cooler 930, and flows back into the oil compensating passage through the second port 160.

In this embodiment, the first interface 150 and the second interface 160 are both provided with internal threads, and the first plugging member 151 and the second plugging member 161 are plugs provided with external threads. In other embodiments, the first blocking member 151 and the second blocking member 161 may be selected according to practical application conditions, and the connection manners corresponding to the first interface 150 and the second interface 160 may be correspondingly adjusted.

Referring to fig. 8 in combination, fig. 8 is a schematic cross-sectional view of a portion of the engine 10 according to the present embodiment when it is connected to an oil cooler 930.

In order to ensure that all engine oil can be cooled and the cooling effect is improved, in this embodiment, an internal thread mounting portion 1231 is disposed at one end, close to the first branch section channel 122, on the inner side wall of the second branch section channel 123, and the internal thread mounting portion 1231 is coaxially disposed with the first interface 150 for mounting the third plugging member 600 to plug the second branch section channel 123.

In order to avoid that the flow rate and the hydraulic pressure change due to the reduction of the path section when the engine oil enters the oil cooler 930 through the oil supplementing channel, in this embodiment, the diameter of the internal thread mounting portion 1231 is equal to or more than 1.4 times of the diameter of the first interface 150, so that after the first blocking member 151 and the second blocking member 161 are replaced by two hollow bolts of the oil cooler 930, the cross-sectional area of the hollow bolts can be matched with the current oil passage flow rate and the current flow velocity.

In practical application, when the external oil cooler 930 is needed, the first blocking member 151 and the second blocking member 161 are disassembled, and then the third blocking member 600 is sent into the second branch section channel 123 from the first interface 150 beyond the first branch section channel 122 to be in threaded fit with the internal thread mounting portion 1231, so as to block one end of the second branch section channel 123 connected with the first branch section channel 122.

After the input end and the output end of the oil cooler 930 are respectively connected to the first interface 150 and the second interface 160, the engine oil flowing out of the first branch section channel 122 does not enter the second branch section channel 123 any more, but flows into the oil cooler 930 through the first interface 150, passes through the oil cooler 930, and then enters the third branch section channel 124 through the second interface 160.

It can be seen that, in this embodiment, in the state of externally connecting the oil cooler 930, the oil cooler 930 is connected in series with the sub-oil pump 500, and the two are in the same oil path, so that it is ensured that all the engine oil input into the oil supply chamber 140 from the oil return tank can obtain the cooling effect of the oil cooler 930. Compared with the prior art that the oil cooler 930 is connected in parallel in the oil path, the cooling effect of engine oil can be remarkably improved, and thus the performance of the engine 10 is improved. And, compared with the prior art of connecting the oil cooler 930 in series on the main oil path, the pumping pressure of the sub-oil pump 500 is smaller, so that the damage of the oil cooler 930 can be avoided, the normal operation of the oil cooler 930 is ensured, and a better engine oil cooling effect is obtained.

In this embodiment, the third plugging member 600 is a plug having external threads, and in other embodiments, the third plugging member 600 may be selected according to practical application conditions.

The lower case 110 includes a top wall 115, a third cylinder 1151 and a fourth cylinder 1152 protruding from the inner surface of the top wall 115, the third cylinder 1151 is located in the oil return chamber 130, the fourth cylinder 1152 is located in the oil supply chamber 140, the bottom ends of the third cylinder 1151 and the fourth cylinder 1152 are all connected with the oil pan 120, the third cylinder 1151 encloses a first channel 1141, the fourth cylinder 1152 encloses a second channel 1142, an oil injection port 1153 is formed on the inner surface of the top wall 115 of the lower case 110, and the oil injection port 1153 is communicated with the second channel 1142.

It is understood that the oil injection port 1153 is provided on the inner surface of the top wall 115 of the lower case 110, so that the oil output from the oil supply channel can be ensured to fall on the liquid surface of the oil in the oil supply chamber 140 in a sprayed state, thereby avoiding the generation of bubbles.

In fact, the third cylinder 1151 and the fourth cylinder 1152 extend in a substantially vertical direction, the top end of the third cylinder 1151 communicates with the oil outlet cavity 1131 of the sub-oil pump mounting part 113, and the bottom end of the third cylinder 1151 is abutted with the top end of the first cylinder 1251, so that the communication between the first channel 1141 and the first branch channel 122 is realized; the bottom end of fourth barrel 1152 interfaces with the top end of second barrel 1252 to provide communication between second channel 1142 and third leg channel 124.

In this embodiment, the number of the oil injection ports 1153 is at least one, and the oil injection ports 1153 include a first oil injection port and a second oil injection port which are sequentially distributed at the periphery of the fourth cylinder 1152, and the first oil injection port and the second oil injection port are eccentrically arranged with the fourth cylinder 1152. A reinforcing rib 1155 is disposed between the first oil injection port and the second oil injection port, one end of the reinforcing rib 1155 is connected with the fourth cylinder 1152, and the other end is connected with the side wall of the oil supply cavity 140. In order to avoid the engine oil from being sprayed out at an excessive pressure, in the present embodiment, the sum of the areas of the plurality of oil spray ports 1153 is greater than or equal to the minimum sectional area of the oil compensating passage.

The oil injection port 1153 is located above the oil supply chamber 140, and the distance between the lowest end of the oil injection port 1153 and the lowest surface of the oil pan 120 is set to be Y, and the distance between the highest point of the oil supply chamber 140 and the lowest surface of the oil pan 120 is set to be X. In this embodiment, Y/X is greater than 0.8, so that the oil outlet point is ensured to be above the highest liquid level in the oil supply chamber 140, and bubbles are prevented from being mixed in the engine oil.

In addition, in order to facilitate forming of the oil injection port 1153, in this embodiment, a hole is formed in the bottom wall of the crank chamber 111 to penetrate through to the top wall of the oil supply chamber 140, and a plug is used to seal the portion communicating with the crank chamber 111, so as to prevent engine oil from entering the crank chamber 140.

Referring to fig. 9 and 10 in combination, fig. 9 is a schematic structural diagram of a part of the structure of the engine 10 provided in the present embodiment at a third view angle, and fig. 10 is a fourth schematic sectional view of the part of the structure of the engine 10.

The tank structure 100 is provided with a main oil pump mounting portion 116 for mounting the main oil pump 400, and specifically, the main oil pump mounting portion 116 is provided on the lower tank 110. The main oil pump mounting portion 116 has an oil inlet chamber 1161 corresponding to an oil inlet end of the main oil pump 400, one end of an oil suction passage is communicated with the oil inlet chamber 1161, the other end of the oil suction passage is communicated with the oil supply chamber 140, and the oil suction passage is used for supplying the main oil pump 400 to pump the oil in the oil supply chamber 140 into a main oil path of the engine 10.

Specifically, a fourth channel 117 is disposed in the lower case 110, a fifth channel is disposed in the oil pan 120, one end of the fourth channel 117 is communicated with the oil inlet cavity 1161, one end of the fourth channel 117, which is far away from the oil inlet cavity 1161, is communicated with one end of the fifth channel, and the other end of the fifth channel is communicated with the oil supply cavity 140.

During operation of the main oil pump 400, the engine oil in the oil supply chamber 140 sequentially enters the oil inlet end of the main oil pump 400 through the fifth channel and the fourth channel 117, and is pumped into the main oil path of the engine 10 through the oil outlet end of the main oil pump 400.

A fifth cylinder 1156 is further protruding on the inner surface of the top wall 115 of the lower tank 110, the fifth cylinder 1156 is located in the oil return cavity 130, the fifth cylinder 1156 encloses the fourth channel 117, and the bottom end of the fifth cylinder 1156 is connected to the oil pan 120.

Correspondingly, a sixth cylinder 1253 is further convexly arranged on the inner surface of the bottom wall 125 of the oil pan 120, the sixth cylinder 1253 is positioned in the oil return cavity 130, a fourth branch section channel 1254 is surrounded by the sixth cylinder 1253, a fifth branch section channel 1255 is arranged in the bottom wall 125, one end of the fourth branch section channel 1254 is communicated with one end of the fifth branch section channel 1255 to form a fifth channel, one end, away from the fourth branch section channel 1254, of the fifth branch section channel 1255 is communicated with the bottom end of the oil supply cavity 140, and the top end of the sixth cylinder 1253 is connected with the lower box 110.

In practice, the fifth barrel 1156 and the sixth barrel 1253 each extend in a generally vertical direction, the top end of the fifth barrel 1156 communicates with the oil feed chamber 1161, and the bottom end of the fifth barrel 1156 interfaces with the bottom end of the sixth barrel 1253, thereby effecting communication of the fourth passage 117 with the fourth branch passage 1254. During operation of the main oil pump 400, the oil in the oil supply chamber 140 first enters the fifth passage provided inside the bottom wall 125 of the oil pan 120, then enters the sixth cylinder 1253 through the fifth passage, enters the fifth cylinder 1156 through the sixth cylinder 1253, and finally enters the main oil pump 400 through the oil inlet chamber 1161.

In this embodiment, the inner surface of the bottom wall 125 of the oil pan 120 is raised corresponding to a partial area of the oil return cavity 130, the fifth branch channel 1255 is disposed in the raised structure, and an opening of one end of the fifth branch channel 1255, which is far away from the fourth branch channel 1254, is located at the bottom of one side of the second partition rib 1211 surrounding the oil supply cavity 140, so as to realize communication between the fifth branch channel 1255 and the bottom of the oil supply cavity 140.

The outer surface of the oil pan 120 is provided with a mounting channel 126, and one end of the fifth branch channel 1255 connected with the fourth branch channel 1254 is coaxially communicated with the mounting channel 126. Engine 10 further includes an oil filter 700. Oil filter 700 extends through mounting passage 126 and fifth leg passage 1255 into the bottom of oil supply chamber 140. Oil filter 700 is removably mated with mounting passage 126.

It will be appreciated that in practice, when the oil filter 700 is to be installed, it is only necessary to extend the oil filter 700 from the installation channel 126 and through the fifth branch channel 1255 into the bottom of the oil supply chamber 140, and then connect the oil filter 700 with the installation channel 126. When the oil filter 700 needs to be removed for cleaning or replacement, the oil filter 700 can be drawn out only by removing the connection between the oil filter 700 and the mounting passage 126.

Referring to fig. 11 in combination, fig. 11 is a schematic diagram of an engine oil filter 700.

In order to ensure tightness between the engine oil filter 700 and the mounting channel 126, prevent engine oil from leaking out, and ensure tightness between the engine oil filter 700 and the fifth branch channel 1255, and ensure an engine oil filtering effect, in this embodiment, a first sealing member 710 and a second sealing member 720 are sleeved on an outer surface of the engine oil filter 700, and the first sealing member 710 is circumferentially abutted against an inner side wall of the fifth branch channel 1255, and the second sealing member 720 is circumferentially abutted against an inner side wall of the mounting channel 126.

In fact, a channel through which the engine oil flows is provided in the engine oil filter 700, a filter screen is wrapped on a portion of the surface of the engine oil filter 700 extending into the oil supply chamber 140, the filter screen is communicated with the channel in the interior, and the engine oil in the oil supply chamber 140 enters the channel in the engine oil filter 700 after being filtered by the filter screen. An opening is provided in the oil filter 700 at a location between the first seal 710 and the second seal 720 through which the internal passage passes filtered oil into the fourth leg passage 1254.

In this embodiment, the outermost end of the oil filter 700 is provided with external threads, and the mounting channel 126 is provided with internal threads, and the oil filter 700 is threadedly engaged with the mounting channel 126. In other embodiments, the connection between the oil filter 700 and the mounting channel 126 is also adjusted according to the actual application conditions.

To further position the oil filter 700 to fix the oil filter 700 on the bottom wall 125 of the oil supply chamber 140, in this embodiment, a limiting protrusion 1256 is provided on the inner surface of the bottom wall 125 of the oil pan 120, the limiting protrusion 1256 is located in the oil supply chamber 140, and one end of the oil filter 700 extending into the oil supply chamber 140 is matched with the limiting protrusion 1256. Specifically, in this embodiment, one end of the engine oil filter 700 extending into the oil supply chamber 140 is cylindrical, the number of the limiting protrusions 1256 is two, the two limiting protrusions 1256 are opposite and arranged at intervals, arc-shaped step surfaces are arranged on the two limiting protrusions 1256, and the two step surfaces are opposite, so that the end of the engine oil filter 700 is clamped and fixed.

Referring to fig. 12 in combination, fig. 12 shows a schematic view of the left cover 170.

The left cover 170 is connected with the left side surface of the lower box 110, the left cover 170 is provided with a oiling cavity 171, the left side cavity wall of the oiling cavity 140 is penetrated and provided with an oiling port 141, the oiling port 141 is communicated with the oiling cavity 171, the cavity wall of the oiling cavity 171 is provided with a detachable oil rule 172, and the oil rule 172 extends into the oiling cavity 140 through the oiling port 141.

It will be appreciated that in practice, a user may detach the oil level gauge 172 from the left cover 170 and withdraw the oil level gauge 172 to read the oil level data in the oil supply chamber 140. And in the case where the oil level in oil feed chamber 140 is too low, oil is added to oil feed chamber 140 through oil feed chamber 171 and oil fill port 141.

An overflow notch 173 is formed in the cavity wall of the oil adding cavity 171, and the height of the overflow notch 173 in the vertical direction is lower than the setting position of the oil rule 172. The left cover 170 is further provided with an overflow passage 174, and the overflow passage 174 is respectively communicated with the overflow notch 173 and the oil return chamber 130, and is used for guiding the engine oil flowing out from the overflow notch 173 into the oil return chamber 130.

When the oil level in oil supply chamber 140 reaches a certain level, the oil will flow into oil supply chamber 171 through the oil port, when the oil level is too high, the oil level in oil supply chamber 171 will reach overflow notch 173, and flow into overflow channel 174 through overflow notch 173, overflow channel 174 will guide the part of overflowed oil into oil return chamber 130, so as to avoid excessive oil in oil supply chamber 140.

In order to ensure the pressure balance in the oil supply cavity 140, the main oil pump 400 is ensured to pump the engine oil in the oil supply cavity 140 into the main oil gallery smoothly, in this embodiment, the top wall 115 of the oil supply cavity 140 is provided with an exhaust port 142 communicated with the crank cavity 111, and the height of the exhaust port 142 in the vertical direction is higher than the overflow notch 173.

It is to be understood that the crankshaft 200 is in driving connection with the balance shaft 300, in this embodiment, the driving gear 210 is coaxially disposed on the crankshaft 200, and the driven gear 310 is coaxially disposed on the balance shaft 300, and the driving gear 210 is meshed with the driven gear 310. During rotation of the crankshaft 200, the driving gear 210 drives the driven gear 310 to rotate, and the driven gear 310 drives the balance shaft 300 to rotate.

The main oil pump 400 is provided with a first drive shaft 410, and the first drive shaft 410 is connected to a rotor of the main oil pump 400. The sub-oil pump 500 is provided with a second drive shaft 510, and the second drive shaft 510 is connected to the rotor of the sub-oil pump 500. In order to improve the overall compactness, in this embodiment, the first driving shaft 410 is in transmission connection with the balance shaft 300 through the second driving shaft 510.

In practical application, in the process that the balance shaft 300 rotates along with the crankshaft 200, the crankshaft 200 drives the first driving shaft 410 and the second driving shaft 510 to rotate, so that unified power output of the main oil pump 400 and the auxiliary oil pump 500 is realized, the transmission mechanism is not configured for the main oil pump 400 and the auxiliary oil pump 500 respectively, the installation space is saved, and the structural compactness of the engine 10 is improved.

Referring to fig. 13 in combination, fig. 13 is a schematic view of a part of the structure of the engine 10 according to the present embodiment at a fourth view angle.

In this embodiment, the balance shaft 300 is coaxially provided with a driving sprocket 320, the second driving shaft 510 is coaxially provided with a driven sprocket 511, and the engine 10 further includes a driving chain 800, and the driving sprocket 320 is connected to the driven sprocket 511 through the driving chain 800.

It will be appreciated that the adjustment of the rotational speed of the second drive shaft 510 can be achieved by correspondingly adjusting the model between the drive sprocket 320 and the driven sprocket 511.

Referring to fig. 14 in combination, fig. 14 is an enlarged schematic view of the area a in fig. 5.

In this embodiment, a first flat square pin 411 is coaxially disposed at one end of the first driving shaft 410, a first flat square hole 512 is coaxially disposed at one end of the second driving shaft 510, and the first flat square pin 411 is inserted into the first flat square hole 512.

In practical application, in the process of rotating the second driving shaft 510 driven by the balance shaft 300, the hole wall of the first flat square hole 512 applies a force to the first flat square pin 411, so as to drive the first driving shaft 410 to rotate synchronously. It will be appreciated that although the first drive shaft 410 and the second drive shaft 510 rotate synchronously, different pump oil demands of the main oil pump 400 and the sub oil pump 500 can be achieved by adjusting the respective rotor thicknesses of the main oil pump 400 and the sub oil pump 500.

In the present embodiment, the main oil pump 400 is disposed at the left side of the lower case 110, the sub oil pump 500 is disposed at the right side of the lower case 110, and the balance shaft 300 extends in the left-right direction.

The engine 10 further includes a water pump 910, the water pump 910 being disposed on the housing structure 100, the water pump 910 being provided with a third drive shaft 911 connected to the internal impeller, the third drive shaft 911 being in driving connection with the balance shaft 300.

It can be seen that in this embodiment, the balance shaft 300 provides power to the water pump 910 in addition to the main oil pump 400 and the sub oil pump 500. The balance shaft 300 drives the third driving shaft 911 to rotate, thereby driving the impeller inside the water pump 910 to rotate, and hydraulic cooling water into the water jacket of the engine 10 to realize cooling circulation.

The tank structure 100 further includes a right cover 920, the main oil pump 400 is disposed in a chamber enclosed by the left cover 170 and the lower tank 110, and the sub oil pump 500 and the water pump 910 are disposed in a chamber enclosed by the right cover 920 and the lower tank 110.

Referring to fig. 15 in combination, fig. 15 is an enlarged schematic view of the area B in fig. 5.

In this embodiment, a second flat square pin 330 is coaxially disposed at one end of the balance shaft 300, a second flat square hole 912 is coaxially disposed at one end of the third driving shaft 911, and the second flat square pin 330 is inserted into the second flat square hole 912. In practical application, when the balance shaft 300 rotates, the second flat square pin 330 provides an acting force to the hole wall of the second flat square hole 912, so as to drive the third driving shaft 911 to rotate, thereby realizing power output to the water pump 910.

As can be seen, in the power transmission system composed of the balance shaft 300, the main oil pump 400, the sub oil pump 500 and the water pump 910, the first driving shaft 410 is fixedly connected with the second driving shaft 510, the balance shaft 300 is fixedly connected with the third driving shaft 911, and only the additional transmission chain 800 is configured to transmit the power between the balance shaft 300 and the second driving shaft 510, so that the space occupied by the transmission mechanism is greatly reduced and the compactness of the engine 10 is significantly improved compared with the prior art.

Considering that axial movement of the impeller of the water pump 910 inevitably occurs during operation of the water pump 910, in order to avoid failure of the water pump 910 under the limit condition, the third driving shaft 911 is withdrawn, in this embodiment, a movement gap 913 is formed between one end of the balance shaft 300 provided with the second flat square pin 330 and one end of the third driving shaft 911 provided with the second flat square hole 912, and the minimum movement gap 913 can prevent the third driving shaft 911 from being limited by the balance shaft 300 after withdrawal under the limit abnormal condition, so that the water pump is not failed.

In summary, the engine 10 provided in this embodiment has a more reasonable structural layout, a shorter oil return path of the oil return chamber 130, and higher oil return efficiency; the oil suction port of the oil suction channel is arranged at the bottom of the oil supply cavity 140, so that normal oil supply to the main oil way in a jolt state can be ensured; the oil suction channel and the oil supplementing channel are formed in the box body structure 100, so that an additional configuration pipeline is omitted, and the structure is simpler; the oil cooler 930 can be more conveniently and rapidly arranged, and a better cooling effect can be obtained under the condition of arranging the oil cooler 930; and, the arrangement of parts is reduced, and the structural compactness of the engine 10 is greatly improved.

In addition, the present embodiment also provides a motorcycle provided with the aforementioned engine 10. The motorcycle provided by the embodiment has the characteristics of more compact structure and higher safety, and benefits from the beneficial effects of the engine 10.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. The engine is characterized by comprising a box body structure (100), a crankshaft (200), a balance shaft (300), a main oil pump (400) and an auxiliary oil pump (500), wherein the box body structure (100) is provided with an oil supply cavity (140) and an oil return cavity (130) which are isolated from each other, the crankshaft (200) and the balance shaft (300) are arranged on the box body structure (100), and the crankshaft (200) is in transmission connection with the balance shaft (300);

the main oil pump (400) with the auxiliary oil pump (500) all set up in on the box structure (100), main oil pump (400) are used for with the main oil circuit that engine (10) was sent into to the oil pump in oil feed chamber (140), auxiliary oil pump (500) are used for with the oil pump in oil return chamber (130) is sent into oil feed chamber (140), main oil pump (400) are provided with first drive shaft (410), auxiliary oil pump (500) are provided with second drive shaft (510), first drive shaft (410) are passed through second drive shaft (510) with balance shaft (300) transmission is connected.

2. The engine according to claim 1, characterized in that a driving sprocket (320) is coaxially arranged on the balance shaft (300), a driven sprocket (511) is coaxially arranged on the second drive shaft (510), the engine (10) further comprises a drive chain (800), and the driving sprocket (320) is connected with the driven sprocket (511) through the drive chain (800).

3. The engine according to claim 1, wherein a first edgewise pin (411) is coaxially arranged at one end of the first driving shaft (410), a first edgewise hole (512) is coaxially arranged at one end of the second driving shaft (510) correspondingly, and the first edgewise pin (411) is spliced with the first edgewise hole (512).

4. The engine according to claim 1, characterized in that a driving gear (210) is coaxially provided on the crankshaft (200), a driven gear (310) is coaxially provided on the balance shaft (300), and the driving gear (210) is meshed with the driven gear (310).

5. The engine according to claim 1, characterized in that the main oil pump (400) is provided on the left side of the tank structure (100), the sub oil pump (500) is provided on the right side of the tank structure (100), and the balance shaft (300) extends in the left-right direction.

6. The engine according to claim 1, characterized in that the engine (10) further comprises a water pump (910), the water pump (910) being arranged on the tank structure (100), the water pump (910) being provided with a third drive shaft (911) connected with an internal impeller, the third drive shaft (911) being in driving connection with the balance shaft (300).

7. The engine of claim 6, wherein the case structure (100) includes a lower case (110), a left cover (170) and a right cover (920), the crankshaft (200) and the balance shaft (300) are disposed on the lower case (110), and the left cover (170) and the right cover (920) are disposed on left and right sides of the lower case (110), respectively;

the main oil pump (400) is arranged in a cavity surrounded by the left cover (170) and the lower box body (110), and the auxiliary oil pump (500) and the water pump (910) are arranged in a cavity surrounded by the right cover (920) and the lower box body (110).

8. The engine according to claim 6, wherein a second edgewise pin (330) is coaxially arranged at one end of the balance shaft (300), a second edgewise hole (912) is coaxially arranged at one end of the third drive shaft (911) correspondingly, and the second edgewise pin (330) is inserted into the second edgewise hole (912).

9. The engine of claim 8, wherein a play gap (913) is formed between an end of the balance shaft (300) where the second flat square pin (330) is disposed and an end of the third drive shaft (911) where the second flat square hole (912) is disposed.

10. A motorcycle, characterized in that it comprises an engine (10) according to any one of claims 1-9.