CN220955791U - Power assembly - Google Patents

Abstract

The utility model discloses a power assembly, which comprises a cylinder cover, an air inlet and outlet mechanism and a cooling mechanism, wherein an accommodating space is formed in the cylinder cover, the air inlet and outlet mechanism is at least partially positioned in the accommodating space and comprises an air inlet component and an air outlet component, the cooling mechanism comprises a water pump structure, a radiator and a water jacket structure, the water jacket structure is at least partially positioned in the accommodating space, and the water jacket structure is communicated with the water pump structure and the radiator. The water pump structure is located one side of power assembly width direction, and water jacket structure and radiator all are located water pump structure's upside, and radiator, water jacket structure and water pump structure distribute along power assembly's length direction, and the radiator is located water jacket structure's front side, and water pump structure is located water jacket structure's rear side, and the radiator still at least part sets up in water jacket structure's upside. Through the arrangement, the exhaust requirement of the cooling mechanism can be met without arranging an independent air overflow pipe, the pipeline arrangement of the cooling mechanism is convenient, and the structure of the cooling mechanism is more compact.

Description

Power assembly

Technical Field

The utility model relates to the technical field of power devices, in particular to a power assembly.

Background

The power assembly has higher working temperature, so that the power assembly needs to be cooled by the cooling mechanism so as to be at a proper working temperature. Therefore, the cooling mechanism also occupies a certain arrangement space in the power assembly. In the prior art, the cooling mechanism can contain gas in the cooling liquid in the working process, and an independent air overflow pipe is required to be arranged for discharging, so that the structure of the cooling mechanism is complex.

Disclosure of utility model

In order to solve the defects in the prior art, the utility model aims to provide a power assembly, which is simple in cooling mechanism.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

The utility model provides a power assembly, this power assembly includes cylinder head, advances exhaust mechanism and cooling body, is formed with accommodation space in the cylinder head, advances exhaust mechanism and is located accommodation space and including admitting air subassembly and exhaust subassembly at least partially, and cooling body includes water pump structure, radiator and water jacket structure, and water jacket structure is located accommodation space at least partially, water jacket structure intercommunication water pump structure and radiator. The water pump structure is located one side of power assembly width direction, and water jacket structure and radiator all are located water pump structure's upside, and radiator, water jacket structure and water pump structure distribute along power assembly's length direction, and the radiator is located water jacket structure's front side, and water pump structure is located water jacket structure's rear side, and the radiator still at least part sets up in water jacket structure's upside.

Further, the cooling mechanism comprises a communication valve, the communication valve is at least partially positioned on the upper sides of the water jacket structure and the water pump structure, the radiator is at least partially arranged on the upper side of the communication valve, the communication valve is communicated with the water pump structure or the radiator, and the communication valve is also communicated with the water jacket structure.

Further, the cooling mechanism comprises a first pipeline and a second pipeline, wherein the first pipeline is communicated with the water pump structure and the radiator, and the second pipeline is communicated with the water pump structure and the water jacket structure.

Further, the water jacket structure comprises a water inlet and a water outlet, the water inlet is arranged close to the exhaust assembly, the water outlet is arranged close to the air inlet assembly, the water outlet is at least partially arranged on the upper side of the water inlet, the water outlet is communicated with the communication valve, and the water inlet is communicated with the first pipeline.

Further, the cooling mechanism comprises a third pipeline, the third pipeline is communicated with the radiator and the communication valve, the third pipeline is positioned on the upper sides of the first pipeline and the second pipeline, and at least part of the third pipeline is positioned on the upper side of the water jacket structure.

Further, the third pipeline comprises a first communication port communicated with the communication valve and a second communication port communicated with the radiator, the first communication port and the second communication port are all basically circular, and the distance between the axis of the first communication port and the axis of the second communication port along the height direction of the power assembly is more than or equal to 7cm and less than or equal to 15cm.

Further, the cooling mechanism further comprises a fourth pipeline, the fourth pipeline is communicated with the water pump structure and the communication valve, and the fourth pipeline is positioned at the lower side of the third pipeline.

Further, the communication valve includes a first state and a second state, when the communication valve is in the first state, the communication valve communicates with the fourth pipe to communicate the water jacket structure with the water pump structure, and when the communication valve is in the second state, the communication valve communicates with the third pipe to communicate the water jacket structure with the radiator.

Further, the radiator, the water jacket structure and the communication valve at least partially overlap as viewed along the length of the powertrain.

Further, the power assembly further comprises a speed change mechanism, the speed change mechanism comprises a clutch, and the water pump structure is arranged on one side far away from the clutch along the width direction of the power assembly.

The arrangement of the water pump structure, the water jacket structure and the radiator of the power assembly can meet the exhaust requirement of the cooling mechanism without arranging an independent air overflow pipe, and the arrangement of pipelines among the water pump structure, the water jacket structure and the radiator can be convenient, so that the layout rationality of the cooling mechanism is improved, and the structure of the cooling mechanism is more compact.

Drawings

FIG. 1 is a schematic diagram of a powertrain of the present utility model;

FIG. 2 is an exploded schematic view of the powertrain of the present utility model;

FIG. 3 is an assembled schematic view of the water pump structure, radiator and water jacket structure of the present utility model;

FIG. 4 is a schematic view of another angular assembly of the water pump structure, radiator and water jacket structure of the present utility model;

FIG. 5 is a schematic view of a portion of the crankcase of the present utility model;

FIG. 6 is a schematic view of a water pump structure according to the present utility model;

FIG. 7 is a cross-sectional view and a partial enlarged view of a crankcase in accordance with the utility model;

FIG. 8 is a schematic cross-sectional view of a cylinder head of the present utility model;

FIG. 9 is a schematic view of the water jacket structure of the present utility model;

fig. 10 is an exploded view of the cylinder head, cylinder gasket and cylinder block of the present utility model.

Detailed Description

In order to make the present utility model better understood by those skilled in the art, the technical solutions in the specific embodiments of the present utility model will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model.

Fig. 1 and 2 show a powertrain 100, the powertrain 100 including an outer housing 11, a crank mechanism 12, a piston mechanism 13, a valve train 14, an ignition device 15, an intake and exhaust mechanism 16, and a speed change mechanism 17. The housing space 111 is formed in the outer case 11, and the crank mechanism 12, the piston mechanism 13, the valve train 14, the ignition device 15, the intake and exhaust mechanism 16, and the speed change mechanism 17 are disposed in the housing space 111.

In the present embodiment, the outer case 11 includes a cylinder head cover 112, a cylinder head 113, a cylinder block 114, a crankcase 115, and an oil pan 116. The cylinder head cover 112, the cylinder head 113, the cylinder block 114, the crankcase 115, and the oil pan 116 are connected in this order. Wherein, a first accommodation space 1131 is formed in the cylinder head 113, and the ignition device 15, the valve train 14 and the air intake and exhaust mechanism 16 are at least partially disposed in the first accommodation space 1131. A second accommodation space 1141 is formed in the cylinder block 114, the piston mechanism 13 is at least partially disposed in the second accommodation space 1141, a third accommodation space 1151 is formed in the crankcase 115, and the crank-link mechanism 12 and the transmission mechanism 17 are at least partially disposed in the third accommodation space 1151.

As one implementation, the combustion chamber of the powertrain 100 is formed by the bottom of the cylinder head 113 and the top of the cylinder block 114. The crank mechanism 12 and the piston mechanism 13 are connected such that movement of the piston mechanism 13 can drive movement of the crank mechanism 12. The valve mechanism 14 is in transmission connection with the crank connecting rod mechanism 12, the valve mechanism 14 is abutted with the air inlet and outlet mechanism 16, and the movement of the crank connecting rod mechanism 12 can drive the valve mechanism 14 to move, so that the valve mechanism 14 can control the air inlet and outlet of the air inlet and outlet mechanism 16. With the above arrangement, normal operation of the powertrain 100 can be achieved.

Specifically, the crank link mechanism 12 includes a crankshaft 121 and a connecting rod 122, and the crankshaft 121 and the piston mechanism 13 are connected by the connecting rod 122 to achieve power transmission between the crankshaft 121 and the piston mechanism 13. Valve train 14 includes a camshaft assembly 141 and a timing assembly 142, with crankshaft 121 and camshaft assembly 141 drivingly connected by timing assembly 142 to enable crankshaft 121 to drive camshaft assembly 141 for movement. The intake and exhaust mechanism 16 includes an intake assembly 161 and an exhaust assembly 162, the cam shaft assembly 141 includes a cam shaft 1411, a first cam 1412 and a second cam 1413, the first cam 1412 and the second cam 1413 are disposed on the cam shaft 1411, the first cam 1412 is abutted with the intake assembly 161, the second cam 1413 is abutted with the exhaust assembly 162, and the cam shaft 1411 is in driving connection with the crankshaft 121 through the timing assembly 142, so that the crankshaft 121 can drive the first cam 1412 on the cam shaft 1411 to control the intake of the intake assembly 161, and the crankshaft 121 can drive the second cam 1413 on the cam shaft 1411 to control the exhaust of the exhaust assembly 162. The speed change mechanism 17 includes a main shaft 171, a counter shaft 172, a shift fork shaft 173, and a fork 174, the main shaft 171 is drivingly connected to the crankshaft 121 and the counter shaft 172, respectively, the main shaft 171 receives power transmitted from the crankshaft 121 and transmits the power to the counter shaft 172 through a meshed gear set, and then outputs the power to the outside through the counter shaft 172. For the sake of clarity of the description of the technical solution of the present application, the front, rear, left, right, up and down are also defined as shown in fig. 1. In the present application, the longitudinal direction of the power unit 100 refers to the front-rear direction in fig. 1, the width direction of the power unit 100 refers to the left-right direction in fig. 1, and the height direction of the power unit 100 refers to the up-down direction in fig. 1.

As shown in fig. 3, the power assembly 100 further includes a cooling mechanism 21, where the cooling mechanism 21 is configured to transfer heat generated during operation of the power assembly 100 to the outside, so as to reduce the temperature of the power assembly 100. The cooling mechanism 21 includes a water pump structure 211 and a radiator 212, wherein the cooling mechanism 21 is internally provided with cooling liquid, the water pump structure 211 is used for providing power for flowing the cooling liquid, and the radiator 212 is used for exchanging heat between the cooling liquid and the outside to realize the cooling function of the cooling mechanism 21. The cooling mechanism 21 further includes a water jacket structure 213, the water jacket structure 213 being at least partially disposed within the first accommodation space 1131, the water jacket structure 213 communicating with the water pump 211 and the radiator 212 to enable circulation of the cooling liquid in the power assembly 100.

As shown in fig. 3, the water pump structure 211 is located at one side in the width direction of the power train 100 to facilitate the piping arrangement of the cooling mechanism 21. As one implementation, both the water jacket structure 213 and the radiator 212 are located on the upper side of the water pump structure 211, the radiator 212 also being at least partially disposed on the upper side of the water jacket structure 213. Through the above arrangement, the high-temperature cooling liquid contains high-temperature gas, the high-temperature cooling liquid flowing out of the water pump structure 211 flows upwards and sequentially passes through the water jacket structure 213 and the radiator 212, and the high-temperature gas also moves upwards and is discharged along with the high-temperature cooling liquid due to the characteristics of the high-temperature cooling liquid, so that the exhaust requirement of the cooling mechanism 21 can be met without arranging an independent air overflow pipe, the structure of the cooling mechanism 21 can be simplified, and the production cost of the power assembly 100 can be reduced. Further, the radiator 212, the water jacket structure 213, and the water pump structure 211 are distributed along the length direction of the power assembly 100, specifically, the radiator 212 is located on the front side of the water jacket structure 213, and the water pump structure 211 is located on the rear side of the water jacket structure 213. Through the arrangement, the arrangement of the pipelines among the water pump structure 211, the water jacket structure 213 and the radiator 212 can be facilitated, the layout rationality of the cooling mechanism 21 is improved, and the structure of the cooling mechanism 21 is more compact.

Specifically, the speed change mechanism 17 includes a clutch (not shown), and the water pump structure 211 is provided on a side away from the clutch in the width direction of the powertrain 100. Through the arrangement, interference with other parts such as a clutch in the pipeline arrangement process of the cooling mechanism 21 can be avoided, and interference with the cooling mechanism 21 during operation of other parts such as the clutch can be avoided, so that the pipeline arrangement of the cooling mechanism 21 can be facilitated, and the working stability of the power assembly 100 can be improved.

As one implementation, the cooling mechanism 21 includes a communication valve 214, the communication valve 214 being used to control the piping communication of the cooling mechanism 21, thereby controlling the direction of flow of the cooling liquid in the cooling mechanism 21. Wherein the communication valve 214 is at least partially located at the upper sides of the water jacket structure 213 and the water pump structure 211, and the radiator 212 is also at least partially disposed at the upper side of the communication valve 214, so as to facilitate the piping arrangement of the cooling mechanism 21 and improve the exhaust efficiency of the cooling mechanism 21. Specifically, the communication valve 214 communicates with the water pump structure 211 or the radiator 212, and the communication valve 214 also communicates with the water jacket structure 213. Through the above arrangement, the cooling mechanism 21 forms a first circulation passage that communicates the water jacket structure 213 and the water pump mechanism, and a second circulation passage that communicates the water pump structure 211, the water jacket structure 213, and the radiator 212, the first circulation passage being used to heat the power assembly 100, and the second circulation passage being used to cool the power assembly 100, so that the power assembly 100 can be at a proper operating temperature, and further the operating efficiency of the power assembly 100 can be improved. In addition, the radiator 212, the water jacket structure 213, and the communication valve 214 are at least partially overlapped as viewed in the length direction of the power assembly 100, so as to improve the compactness of the radiator 212, the water jacket structure 213, and the communication valve 214, thereby improving the space utilization of the power assembly 100.

In the present embodiment, the cooling mechanism 21 includes a first pipe 215 and a second pipe 216, the first pipe 215 communicating the water pump structure 211 and the radiator 212, and the second pipe 216 communicating the water pump structure 211 and the water jacket structure 213. The cooling mechanism 21 further includes a third pipe 217, and the third pipe 217 communicates with the radiator 212 and the communication valve 214. Through the arrangement, the first pipeline 215, the second pipeline 216 and the third pipeline 217 cooperate together to form a second circulation channel, so that the cooling liquid flows from the water pump structure 211 to the radiator 212 after flowing through the water jacket structure 213, and flows from the radiator 212 to the water pump structure 211 after completing heat exchange with the radiator 212, thereby reducing the working temperature of the power assembly 100 and improving the working stability of the power assembly 100. In addition, the third pipeline 217 is located on the upper sides of the first pipeline 215 and the second pipeline 216, and the third pipeline 217 is at least partially located on the upper side of the water jacket structure 213, so that high-temperature gas in the cooling liquid is conveniently discharged, the gas content in the cooling liquid is reduced, and the working efficiency of the cooling mechanism 21 can be improved.

In the present embodiment, the cooling mechanism 21 further includes a fourth pipe 218, the fourth pipe 218 communicates with the water pump structure 211 and the communication valve 214, and the fourth pipe 218 is located at the lower side of the third pipe 217. Through the arrangement, the first pipeline 215 and the fourth pipeline 218 cooperate to form a first circulation channel, and the first circulation channel is used for transmitting heat generated by the operation of the piston mechanism 13 to other parts of the power assembly 100 to heat the power assembly 100 when the power assembly 100 starts to operate, so that the temperature field of the power assembly 100 is more uniform, and the power assembly 100 can reach a proper working temperature faster, the working efficiency of the power assembly 100 is improved, the working efficiency of the power assembly 100 is reduced due to the non-uniform temperature field of the power assembly 100, or the service life of the power assembly 100 is prolonged due to the non-uniform temperature field of the power assembly 100.

In this embodiment, the water jacket structure 213 includes a water inlet 2131 and a water outlet 2132, the water inlet 2131 being disposed proximate to the exhaust assembly 162, the water outlet 2132 being disposed proximate to the intake assembly 161, the water outlet 2132 being at least partially disposed above the water inlet 2131, the water outlet 2132 being in communication with the communication valve 214, the water inlet 2131 being in communication with the first conduit 215. Through the arrangement, the cooling liquid in the water jacket structure 213 can flow more smoothly, and the exhaust component 162 with higher temperature can be cooled first, so that the flowing path of the cooling liquid is more reasonable, and the cooling effect of the cooling mechanism 21 can be improved.

As shown in fig. 4, in the present embodiment, the third pipe 217 includes the first communication port 2171 communicating with the communication valve 214 and the second communication port 2172 communicating with the radiator 212, each of the first communication port 2171 and the second communication port 2172 is substantially cylindrical, and the distance H between the axis of the first communication port 2171 and the axis of the second communication port 2172 in the height direction of the power assembly 100 is 7cm or more and 15cm or less, so that the third pipe 217 extends substantially upward, thereby facilitating the exhaust of the cooling mechanism 21. Specifically, the distance H between the axis of the first communication port 2171 and the axis of the second communication port 2172 in the height direction of the power assembly 100 is 9cm or more and 13cm or less. More specifically, the distance H between the axis of the first communication port 2171 and the axis of the second communication port 2172 in the height direction of the power assembly 100 may be set to 11cm. By the above arrangement, it is possible to avoid not only that the distance H between the axis of the first communication port 2171 and the axis of the second communication port 2172 in the height direction of the power assembly 100 is too large to facilitate the arrangement of the third pipe 217, but also that the distance H between the axis of the first communication port 2171 and the axis of the second communication port 2172 in the height direction of the power assembly 100 is too small to make the tendency that the third pipe 217 extends upward smaller, so as to avoid lowering the exhaust efficiency of the cooling mechanism 21.

As one implementation, the communication valve 214 includes a first state and a second state. When the communication valve 214 is in the first state, the communication valve 214 communicates with the fourth pipe 218 so that the water jacket structure 213 communicates with the water pump structure 211, at which time the first circulation passage of the cooling mechanism 21 is opened to heat the power assembly 100, and when the communication valve 214 is in the second state, the communication valve 214 communicates with the third pipe 217 so that the water jacket structure 213 communicates with the radiator 212, at which time the second circulation passage of the cooling mechanism 21 is opened to cool the power assembly 100. Through the above arrangement, the first circulation passage and the second circulation passage can be integrally provided, so that the structural compactness of the power assembly 100 can be improved.

After the power assembly 100 starts to operate, the communication valve 214 is in a first state, the power assembly 100 is heated by the first circulation channel, the communication valve 214 is switched from the first state to a second state after the temperature rises, the low-temperature coolant in the second circulation channel enters the power assembly 100 to reduce the temperature, the communication valve 214 is switched from the second state to the first state again, the cooling mechanism 21 is in an oscillating state in which the first state and the second state are alternately switched, and when the temperature of the power assembly 100 rises to a relatively high temperature, the communication valve 214 is stably in the second state to cool the power assembly 100 by the second circulation channel.

As shown in fig. 5 and 6, the water pump structure 211 is at least partially disposed in the third accommodating space 1151, and the water pump structure 211 includes a water pump bearing 2111 and a bearing sleeve 2112, wherein the bearing sleeve 2112 is sleeved on the water pump bearing 2111. Specifically, an oil guiding groove 1157 for collecting lubricating oil in the crankcase 115 is provided on the crankcase 115, the oil guiding groove 1157 mainly collects oil mist in the crankcase 115 and the dropped lubricating oil, a lubricating oil hole 2112a and an oil drain hole 2112b are provided on the bearing housing 2112, the oil guiding groove 1157 communicates with the lubricating oil hole 2112a, the lubricating oil hole 2112a and the oil drain hole 2112b communicate with the water pump bearing 2111, and the oil drain hole 2112b is located at the lower side of the lubricating oil hole 2112 a. Through the above arrangement, after the lubricating oil in the crankcase 115 is collected in the oil guide groove 1157, the lubricating oil flows into the water pump bearing 2111 through the lubricating oil hole 2112a, so that the water pump bearing 2111 can be lubricated, the dry grinding failure of the water pump bearing 2111 is avoided, and the service life of the water pump structure 211 can be further prolonged. In addition, excessive lubrication oil can be discharged through the oil drain hole 2112b, and the lubrication oil is prevented from accumulating in the water pump bearing 2111 to clog the water pump bearing 2111, so that the operation stability of the water pump structure 211 can be improved.

As one implementation, the oil guide groove 1157 is located in the third accommodation space 1151, and the oil guide groove 1157 is located at an upper side of the lubrication oil hole 2112 a. With the above arrangement, the lubricating oil collected in the oil guide groove 1157 can flow to the lubricating oil hole 2112a under the action of gravity, so that the lubricating oil can enter the water pump bearing 2111 conveniently, and the flow speed of the lubricating oil can be increased by the oil guide groove 1157 located on the upper side of the lubricating oil hole 2112 a.

In this embodiment, the oil guiding groove 1157 further includes an opening 1157a and an oil guiding groove bottom 1157b, wherein the opening 1157a is located at an upper side of the oil guiding groove bottom 1157b, and defines a reference plane 103 perpendicular to the height direction of the power assembly 100, and an area of a projection plane of the opening 1157a on the reference plane 103 along the height direction of the power assembly 100 is larger than an area of a projection plane of the oil guiding groove bottom 1157b on the reference plane 103 along the height direction of the power assembly 100. By the above arrangement, the area of the projection surface of the opening 1157a is larger than the area of the projection surface of the oil guiding groove bottom 1157b, so that the shape of the oil guiding groove 1157 is substantially in an open-type V shape, thereby improving the collection efficiency of the lubricating oil. It should be understood that the shape of the oil guiding groove 1157 is only a preferred embodiment, and the shape of the oil guiding groove 1157 may be enough that the area of the projection surface of the opening 1157a is larger than the area of the projection surface of the bottom 1157b of the oil guiding groove.

In the present embodiment, the bearing housing 2112 is at least partially located in the third accommodation space 1151, and the lubrication hole 2112a and the drain hole 2112b are also in communication with the third accommodation space 1151, so that not only is the lubrication oil facilitated to flow into the lubrication hole 2112a, but also the lubrication oil is prevented from leaking. Specifically, the lubrication hole 2112a, the water pump bearing 2111, and the drain hole 2112b are substantially distributed in the height direction of the power assembly 100, and the water pump bearing 2111 is located between the lubrication hole 2112a and the drain hole 2112 b. Through the arrangement, the lubricating oil can flow into the water pump bearing 2111 from the lubricating oil hole 2112a and flow out from the oil drain hole 2112b under the action of gravity, so that the water pump bearing 2111 can be fully lubricated, the phenomenon that the lubricating oil is accumulated in the water pump bearing 2111 to increase the rotation resistance of the water pump bearing 2111 can be avoided, and the working efficiency of the water pump bearing 2111 can be improved.

As one implementation, the drain hole 2112b is located between the water pump bearing 2111 and the bearing housing 2112, and the drain hole 2112b is substantially semicircular in cross section. Wherein, a predetermined plane 2111a perpendicular to the axial direction of the water pump bearing 2111 is defined, and the section of the drain hole 2112b cut by the predetermined plane 2111a is the section of the drain hole 2112 b. Through the above arrangement, the semicircular oil drain hole 2112b enables the oil drain hole 2112b to avoid interference with the assembly of the water pump bearing 2111 and the bearing sleeve 2112 under the condition that the oil drain function is satisfied, so that the oil drain hole 2112b does not interfere with the normal operation of the water pump bearing 2111, and further the operation stability of the water pump structure 211 can be improved. In addition, the drain hole 2112b is located on the end face of the bearing housing 2112 on the side away from the water pump structure 211, and the drain hole 2112b extends substantially in the axial direction of the water pump bearing 2111, so that it is unnecessary to machine the radial drain hole 2112b on the bearing housing 2112, so that the drain hole 2112b does not affect the structural strength of the bearing housing 2112.

As shown in fig. 7, in the present embodiment, the lubrication hole 2112a is substantially cylindrical, and an acute angle Ω formed by the axis of the lubrication hole 2112a and the reference plane 103 is 30 ° or more and 60 ° or less. Specifically, the acute angle Ω formed by the axis of the lubrication hole 2112a and the reference plane 103 is 36 ° or more and 54 ° or less. More specifically, the axis of the lubrication hole 2112a and the reference plane 103 form an acute angle Ω of 45 °. By the above arrangement, the interference between the lubrication hole 2112a and the water pump bearing 2111 caused by the excessively large acute angle Ω can be avoided, so that the arrangement of the water pump bearing 2111 is facilitated, and the accumulation and blockage of the lubrication hole 2112a caused by the excessively slow flow velocity of the lubrication oil in the lubrication hole 2112a caused by the excessively small acute angle Ω can be avoided, so that the fluidity of the lubrication oil in the lubrication hole 2112a can be improved.

In the present embodiment, a guide groove 2112c for guiding the flow of the lubricating oil is further provided in the bearing housing 2112, and the guide groove 2112c communicates with the bottom of the oil guide groove 1157 and the lubricating oil hole 2112a, respectively. With the above arrangement, the guide groove 2112c allows the lubricant to accumulate in the lubricant hole 2112a when the lubricant flowing in the lubricant hole 2112a is small, and allows the lubricant to flow from the other side of the guide groove 2112c to the third accommodation space 1151 when the lubricant flowing in the lubricant hole 2112a is large, thereby preventing the lubricant from accumulating excessively in the water pump bearing 2111 and improving the operation stability of the water pump structure 211. Alternatively, the guide groove 2112c may extend substantially along a predetermined straight line, and the predetermined straight line may form an acute angle with the reference plane 103, so that the guide groove 2112c may be inclined toward the lubrication hole 2112a, thereby improving the fluidity of the lubrication hole 2112a, so that the guide groove 2112c may provide a certain guiding effect for the lubrication oil entering the lubrication hole 2112a.

As shown in fig. 8 and 9, as one implementation, the water jacket structure 213 includes a first passage 2133 disposed proximate to the exhaust assembly 162 and a second passage 2134 disposed proximate to the intake assembly 161, the first passage 2133 and the second passage 2134 communicating, the first passage 2133 and the second passage 2134 extending substantially in the width direction of the powertrain 100 such that coolant flows in the second passage 2134 in the width direction of the powertrain 100. The first passage 2133 is provided with a partition 2133a, and the partition 2133a is used to restrict the flow of the coolant in the width direction of the powertrain 100 in the first passage 2133. In the prior art, the coolant may flow in the first passage 2133 along the width direction of the powertrain 100, and the first passage 2133 is narrower than the second passage 2134, so that the coolant in the first passage 2133 flows faster, resulting in poor heat exchange efficiency between the coolant and the cylinder head 113, and thus poor cooling effect on the side of the cylinder head near the exhaust assembly 162. In the present application, the blocking portion 2133a can block the flow of the coolant in the width direction of the power assembly 100 in the first passage 2133, so that the flow rate of the coolant in the first passage 2133 can be reduced, the flow rates of the coolant in the first passage 2133 and the second passage 2134 are substantially uniform, the flow direction of the coolant can be changed, and the cylinder head 113 can be cooled uniformly, thereby improving the cooling effect of the cylinder head 113. Specifically, the partition 2133a and the cylinder head 113 are integrally formed. With the above arrangement, the integral molding process can improve the structural strength of the partition portion 2133a, thereby improving the service life of the water jacket structure 213.

More specifically, cylinder head 113 includes a cylinder head housing 1132 and an exhaust housing 1133 located within first receiving space 1131, exhaust assembly 162 is disposed within exhaust housing 1133, and partitions 2133a connect exhaust housing 1133 and cylinder head housing 1132, respectively. Cylinder head 113 further includes an intake housing 1134 disposed within first receiving space 1131, and intake assembly 161 is disposed within intake housing 1134, wherein the cooling fluid of first passageway 2133 flows through exhaust housing 1133 and intake housing 1134 to second passageway 2134. In addition, in the prior art, since the coolant in the first passages 2133 may flow in the width direction of the powertrain 100, the coolant mostly flows from the first passages 2133 directly to the second passages 2134, and less coolant flows through the exhaust housing 1133 and the intake housing 1134. In the present application, the partition 2133a connects the cylinder head housing 1132 and the exhaust housing 1133, and changes the flow direction of the cooling liquid in the first channel 2133, so that the cooling liquid flows to the second channel 2134 after the exhaust housing 1133 and the intake housing 1134 are sufficiently cooled, thereby improving the heat exchange efficiency of the exhaust housing 1133 and the cooling liquid, and the heat exchange efficiency of the intake housing 1134 and the cooling liquid, and further improving the cooling effect of the cooling mechanism 21 on the exhaust assembly 162 and the intake assembly 161.

In the present embodiment, the water inlet 2131 is provided on the lower water jacket 2135, the water outlet 2132 is provided on the upper water jacket 2136, and the water outlet 2132 communicates with the second passage 2134. Through the arrangement, the exhaust component 162 with higher temperature can be cooled firstly, and then the air inlet component 161 is cooled, so that the flow path of the cooling liquid is more reasonable, and the cooling effect of the water jacket structure 213 can be improved.

As shown in fig. 10, as one implementation, the water jacket structure 213 includes a lower water jacket 2135 provided on the cylinder block 114 and an upper water jacket 2136 located in the first accommodation space 1131, the lower water jacket 2135 and the upper water jacket 2136 communicating, and the first passage 2133 and the second passage 2134 are both located in the upper water jacket 2136. Specifically, the lower water jacket 2135 is provided with a first connection hole 2135a, and the lower water jacket 2135 and the upper water jacket 2136 communicate through the first connection hole 2135 a. Wherein, be provided with cylinder gasket 1143 between lower floor's water jacket 2135 and the upper water jacket 2136, be provided with second connecting hole 1143a on the cylinder gasket 1143, second connecting hole 1143a communicates first connecting hole 2135a and upper water jacket 2136. Through the above arrangement, the cooling liquid enters the upper water jacket 2136 from the lower water jacket 2135 through the first connecting hole 2135a and the second connecting hole 1143a, so that the water jacket structure 213 can cool the cylinder block 114 with higher temperature first, and then cool the exhaust assembly 162 and the intake assembly 161, thereby improving the cooling efficiency of the power assembly 100. In addition, the cylinder gasket 1143 may also improve the sealability between the cylinder head 113 and the cylinder block 114, so that leakage of the coolant during operation of the power assembly 100 may be prevented, and thus, the operational stability of the water jacket structure 213 may be improved.

It will be understood that modifications and variations will be apparent to those skilled in the art from the foregoing description, and it is intended that all such modifications and variations be included within the scope of the following claims.

Claims (10)

1. A powertrain, comprising:

a cylinder head having an accommodation space formed therein;

the air inlet and outlet mechanism is at least partially positioned in the accommodating space and comprises an air inlet component and an air outlet component;

The cooling mechanism comprises a water pump structure, a radiator and a water jacket structure, wherein the water jacket structure is at least partially positioned in the accommodating space, and the water jacket structure is communicated with the water pump structure and the radiator;

It is characterized in that the method comprises the steps of,

The water pump structure is located on one side of the width direction of the power assembly, the water jacket structure and the radiator are located on the upper side of the water pump structure, the radiator, the water jacket structure and the water pump structure are distributed along the length direction of the power assembly, the radiator is located on the front side of the water jacket structure, the water pump structure is located on the rear side of the water jacket structure, and the radiator is at least partially arranged on the upper side of the water jacket structure.

2. The powertrain of claim 1, wherein the cooling mechanism includes a communication valve at least partially located on an upper side of the water jacket structure and the water pump structure, the radiator is further at least partially disposed on an upper side of the communication valve, the communication valve communicates with the water pump structure or the radiator, and the communication valve further communicates with the water jacket structure.

3. The powertrain of claim 2, wherein the cooling mechanism includes a first conduit and a second conduit, the first conduit communicating with the water pump structure and the radiator, the second conduit communicating with the water pump structure and the water jacket structure.

4. A power assembly according to claim 3, wherein the water jacket structure comprises a water inlet and a water outlet, the water inlet being disposed adjacent the exhaust component, the water outlet being disposed adjacent the intake component, the water outlet being at least partially disposed on an upper side of the water inlet, the water outlet being in communication with the communication valve, the water inlet being in communication with the first conduit.

5. A powertrain according to claim 3, wherein the cooling mechanism comprises a third conduit communicating the radiator and the communication valve, the third conduit being located on an upper side of the first conduit and the second conduit, the third conduit being located at least partially on an upper side of the water jacket structure.

6. The powertrain of claim 5, wherein the third conduit includes a first communication port that communicates with the communication valve and a second communication port that communicates with the radiator, the first communication port and the second communication port each being substantially circular, and a distance between an axis of the first communication port and an axis of the second communication port in a height direction of the powertrain is 7cm or more and 15cm or less.

7. The powertrain of claim 5, wherein the cooling mechanism further includes a fourth conduit that communicates with the water pump structure and the communication valve, the fourth conduit being located on an underside of the third conduit.

8. The powertrain of claim 7, wherein the communication valve includes a first state and a second state, the communication valve communicating with the fourth conduit when the communication valve is in the first state to communicate the water jacket structure with the water pump structure, the communication valve communicating with the third conduit when the communication valve is in the second state to communicate the water jacket structure with the radiator.

9. The powertrain of claim 1, wherein the radiator, the water jacket structure, and the communication valve at least partially overlap as viewed along a length of the powertrain.

10. The powertrain of claim 1, further comprising a speed change mechanism including a clutch, wherein the water pump structure is disposed on a side remote from the clutch in a width direction of the powertrain.