Engines and ATVs

Abstract

The present invention discloses an engine and an all-terrain vehicle. The engine comprises: a crankcase, the crankcase comprises: a case body and an oil pan, the oil pan is installed at the bottom of the case body, an oil cavity and an oil outlet are formed in the case body, and the oil cavity is connected with the oil outlet; a first oil pump, the first oil pump is arranged between the oil pan and the oil cavity, and the first oil pump is used to pump the lubricating oil in the oil pan into the oil cavity; a second oil pump, the second oil pump is arranged between the oil cavity and the oil outlet. Therefore, the present invention adopts a dual oil pump method, the first oil pump is used to pump the lubricating oil in the oil pan into the oil cavity, so that the oil storage in the oil cavity can be sufficient, and the second oil pump can pump the lubricating oil in the oil cavity and supply it to the surface of each moving pair, so as to ensure the lubrication effect of each moving pair, and compared with the single oil pump method, the dual oil pump method can at least avoid the problem of unstable oil pressure to a certain extent.

Description

Technical Field

[0001] The invention relates to the technical field of all-terrain vehicles, and in particular to an engine and an all-terrain vehicle. Background Art

[0002] In the related art, the engine can convert the internal energy generated by fuel combustion into mechanical energy through the coordinated action of multiple moving parts, so as to drive the vehicle on the road. In order to ensure the working reliability of multiple moving parts, multiple moving parts need to be lubricated with lubricating oil. The commonly used lubrication method is to use an oil pump to pump the lubricating oil in the oil pan and then supply it to the surface of each moving part. However, due to the use of a single oil pump and the oil pump driven by the crankshaft and other related structures, there is a problem of unstable oil pressure. The oil pressure is easy to change, resulting in wear of the moving parts, poor stability, and short service life. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide an engine that can continuously and stably supply oil to each moving pair.

[0004] The present invention further provides an all-terrain vehicle.

[0005] According to the engine of the present invention, it comprises: a crankcase, which comprises: a case body and an oil pan, the oil pan is installed at the bottom of the case body, an oil cavity and an oil outlet are formed in the case body, and the oil cavity is connected to the oil outlet; a first oil pump, the first oil pump is arranged between the oil pan and the oil cavity, and the first oil pump is used to pump the lubricating oil in the oil pan into the oil cavity; a second oil pump, the second oil pump is arranged between the oil cavity and the oil outlet.

[0006] Therefore, the present invention adopts a dual oil pump approach, in which the first oil pump is used to pump the lubricating oil in the oil pan into the oil chamber, thereby ensuring sufficient oil storage in the oil chamber, and the second oil pump can pump the lubricating oil in the oil chamber and supply it to the surface of each moving pair, thereby ensuring the lubrication effect of each moving pair, and compared with the single oil pump approach, the dual oil pump approach can at least avoid the problem of unstable oil pressure to a certain extent, and can ensure continuous and stable oil supply to each moving pair, thereby reducing the wear of each moving pair, improving the working stability of the engine, and extending the service life of the engine.

[0007] In some examples of the present invention, the oil chamber includes: a first oil chamber and a second oil chamber, the first oil pump is connected to the first oil chamber, the first oil chamber is connected to the second oil chamber, and the second oil pump is arranged between the second oil chamber and the oil outlet.

[0008] In some examples of the present invention, the box body includes: a main body, a first box cover and a second box cover, the lateral surface of the main body is formed with an open first oil chamber and a second oil chamber, the first box cover is arranged on the open side of the first oil chamber, and the second box cover is arranged on the open side of the second oil chamber.

[0009] In some examples of the present invention, the lateral surface of the main body is provided with a first inclined surface and a second inclined surface distributed from top to bottom, the first inclined surface is not coplanar with the second inclined surface, the first box cover is provided on the first inclined surface, and the second box cover is provided on the second inclined surface.

[0010] In some examples of the present invention, a plurality of first oil holes for connecting the first oil chamber and the second oil chamber are provided between the first oil chamber and the second oil chamber.

[0011] In some examples of the present invention, a plurality of the first oil holes are arranged at intervals in the length direction of the main body.

[0012] In some examples of the present invention, the main body includes: a first main body and a second main body, the second main body is installed between the first main body and the oil pan, the first oil cavity is formed on the lateral surface of the first main body, and the second oil cavity is formed on the lateral surface of the second main body.

[0013] In some examples of the present invention, the oil outlet channel includes: a first oil outlet channel, a first oil outlet pipe and a second oil outlet channel, the first oil outlet channel connects the second oil pump and one end of the first oil outlet pipe, and the other end of the first oil outlet pipe is connected to the second oil outlet channel.

[0014] In some examples of the present invention, a pressure relief valve is disposed on the first oil outlet passage, and the pressure relief valve is disposed in the second oil chamber.

[0015] In some examples of the present invention, the crankcase also includes: an oil filter, the oil filter is arranged on one side of the main body, the main body is provided with a third oil outlet passage, the third oil outlet passage connects the first oil outlet pipe and the oil filter, and the oil filter is also connected to the second oil outlet passage.

[0016] In some examples of the present invention, the crankcase further includes: a third case cover, the third case cover is arranged on one axial side of the main body, the oil filter is arranged on the third case cover, and the third case cover is provided with a fourth oil outlet passage and a fifth oil outlet passage, the fourth oil outlet passage connects the third oil outlet passage and the oil filter, and the fifth oil outlet passage connects the oil filter and the second oil outlet passage.

[0017] In some examples of the present invention, the third tank cover is provided with a water pump shaft mounting hole; and a sixth oil outlet passage for supplying lubricating oil to the pump shaft is provided between the fourth oil outlet passage and the water pump shaft mounting hole.

[0018] In some examples of the present invention, the main body includes: a first main body and a second main body, the second main body is installed between the first main body and the oil pan, the first main body is formed with the first oil cavity on the lateral surface, the second main body is formed with the second oil cavity on the lateral surface, the first oil outlet channel extends in the first main body and the second main body, and the second oil outlet channel and the first oil outlet pipe are arranged on the first main body.

[0019] In some examples of the present invention, the second oil outlet channel is disposed in the first main body, the first oil outlet pipe is disposed in the first oil cavity, and the oil outlet of the first oil outlet channel and the oil inlet of the third oil outlet channel are disposed in the first oil cavity and are connected to the first oil outlet pipe.

[0020] In some examples of the present invention, both ends of the first oil outlet pipe are detachably installed in the first oil chamber.

[0021] In some examples of the present invention, a crankshaft mounting hole and a balance shaft mounting hole are formed in the main body, and a portion of the first oil outlet passage is disposed between the crankshaft mounting hole and the balance shaft mounting hole.

[0022] In some examples of the present invention, a crankshaft mounting hole and a balance shaft mounting hole are formed in the main body, and the oil outlet passage also includes: a seventh oil outlet passage and an eighth oil outlet passage, the seventh oil outlet passage connects the second oil outlet passage and the crankshaft mounting hole, and the eighth oil outlet passage connects the second oil outlet passage and the balance shaft mounting hole.

[0023] In some examples of the present invention, there are multiple crankshaft mounting holes and multiple balance shaft mounting holes, the axis of the second oil outlet is parallel to the axis of the crankshaft of the engine, there are multiple seventh oil outlets and eight oil outlets and they are axially spaced apart, the multiple seventh oil outlets correspond one-to-one to the multiple crankshaft mounting holes, and the multiple eighth oil outlets correspond one-to-one to the multiple balance shaft mounting holes.

[0024] In some examples of the present invention, the oil inlet of the second oil pump is provided with a first filter, and the first filter is disposed in the second oil chamber.

[0025] In some examples of the present invention, the first filter is cylindrical, and the axis of the first filter is parallel to the axis of the crankshaft of the engine.

[0026] In some examples of the present invention, an oil inlet passage is provided between the first oil pump and the first oil chamber, and the oil inlet passage is connected to an oil cooler.

[0027] In some examples of the present invention, the box body includes: a main body, a first box cover and a second box cover, the main body includes: a first main body and a second main body, the second main body is installed between the first main body and the oil pan, the first main body is formed with the first oil cavity on the lateral surface, the second main body is formed with the second oil cavity on the lateral surface, the first box cover is arranged on the first oil cavity, the second box cover is arranged on the second oil cavity, and the oil cooler is arranged on the second box cover.

[0028] In some examples of the present invention, the second main body is provided with a first oil inlet passage and a fourth oil inlet passage, the second tank cover is provided with a second oil inlet passage and a third oil inlet passage, the oil outlet of the first oil pump and the oil inlet of the oil cooler are connected through the first oil inlet passage and the second oil inlet passage, and the oil outlet of the oil cooler and the first oil chamber are connected through the third oil inlet passage and the fourth oil inlet passage.

[0029] In some examples of the present invention, the first main body is provided with a first oil inlet pipe, and the first oil chamber is communicated with the fourth oil inlet passage through the first oil inlet pipe.

[0030] In some examples of the present invention, the first oil pump and the second oil pump are coaxially arranged and are provided with a common pump shaft.

[0031] The all-terrain vehicle according to the present invention comprises: the engine mentioned above.

[0032] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0034] Figure 1 is a schematic structural diagram of an engine according to an embodiment of the present invention, and shows the structure of an oil outlet passage;

[0035] Figure 2 It is a schematic diagram of the structure of the crankcase, and shows the structure of the oil inlet passage;

[0036] Figure 3 is a cross-sectional view of the crankcase, and shows the structure of the oil inlet passage;

[0037] Figure 4 is a schematic diagram of the structure of the second subject;

[0038] Figure 5 is a structural schematic diagram of the second main body and the second box cover;

[0039] Figure 6 This is an exploded view of the box;

[0040] Figure 7 It is a cross-sectional view of the subject;

[0041] Figure 8 is a schematic diagram of the structure of the second subject;

[0042] Fig. 9 is a schematic diagram of the structure of the pressure relief valve and the second body;

[0043] Fig.10 is a structural schematic diagram of a first oil outlet pipe and a first main body;

[0044] Fig.11 It is a structural schematic diagram of the third box cover;

[0045] Fig.12 is a side view schematic diagram of the first subject;

[0046] Fig.13 is a cross-sectional view of the first body and shows the second oil outlet passage;

[0047] Fig.14 It is a schematic diagram of the structure of the third tank cover and the oil filter;

[0048] Fig.15 is a schematic diagram of the structure of the first oil pump and the second oil pump;

[0049] Fig.16 It is a structural diagram of the oil pan.

[0050] Reference numerals:

[0051] Engine 1000;

[0052] Crankcase 100; case 110; main body 111; first case cover 112; second case cover 113; first main body 114; second main body 115; first inclined surface 116; second inclined surface 117; third case cover 118; water pump shaft mounting hole 119; crankshaft mounting hole 120; balance shaft mounting hole 121; flat plate 122; raised portion 123; oil pan 124; first filter screen mounting hole 125; pressure relief valve mounting hole 126;

[0053] Oil chamber 130; first oil chamber 131; second oil chamber 132; first oil hole 133;

[0054] Oil outlet passage 140; first oil outlet passage 141; oil inlet 141a of the first oil outlet passage; oil outlet 141b of the first oil outlet passage; first transfer port 141c of the first oil outlet passage; second transfer port 141d of the first oil outlet passage;

[0055] a first oil outlet pipe 142; a second oil outlet passage 143; an oil inlet 143a of the second oil outlet passage; a pressure relief valve 144; a third oil outlet passage 145; an oil inlet 145a of the third oil outlet passage; an oil outlet 145b of the third oil outlet passage; a fourth oil outlet passage 146; a fifth oil outlet passage 147; a sixth oil outlet passage 148; a seventh oil outlet passage 149; an eighth oil outlet passage 150; an oil quality monitoring pipe 151;

[0056] Oil inlet passage 160; first oil inlet passage 161; oil inlet port 161a of the first oil inlet passage; oil outlet port 161b of the first oil inlet passage; second oil inlet passage 162; third oil inlet passage 163; fourth oil inlet passage 164; oil inlet port 164a of the fourth oil inlet passage; first oil inlet pipe 165;

[0057] First oil pump 200; second filter screen 210; second oil pump 300; first filter screen 310;

[0058] Oil filter 400; Oil cooler 500. DETAILED DESCRIPTION

[0059] Embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Embodiments of the present invention are described in detail below.

[0060] Reference below Figure 1-Figure 16 An engine 1000 according to an embodiment of the present invention is described, and the engine 1000 is applied to an all-terrain vehicle.

[0061] like Figure 1 and Figure 2 As shown, the engine 1000 according to the embodiment of the present invention may include: a crankcase 100, a first oil pump 200 and a second oil pump 300. The first oil pump 200 and the second oil pump 300 are both arranged in the crankcase 100, and the first oil pump 200 and the second oil pump 300 can cooperate in the crankcase 100, so as to continuously and stably supply lubricating oil to each moving pair of the engine 1000, thereby ensuring the lubrication effect of each moving pair and extending the service life of the engine 1000.

[0062] like Figures 1 to 6As shown, the crankcase 100 includes: a case 110 and an oil pan 124. The oil pan 124 is installed at the bottom of the case 110. The oil pan 124 is used to contain part of the lubricating oil. An oil inlet 160, an oil cavity 130 and an oil outlet 140 are formed in the case 110. The oil inlet 160 is connected to the oil cavity 130. The oil inlet 160 is also connected to the oil pan 124 to suck the lubricating oil in the oil pan 124 upward into the oil cavity 130. The oil cavity 130 is connected to the oil outlet 140. That is, the crankcase 100 of the present invention is provided with an oil cavity 130 for storing lubricating oil on the case 110 on the basis of the oil pan 124. The oil cavity 130 can replace the traditional oil pan and has an oil storage function. In this way, the height of the oil storage position of the engine 1000 can be increased on one hand, and the depth of the oil pan 124 can be reduced on the other hand, the size of the engine 1000 can be reduced, and the passability of the all-terrain vehicle can be improved.

[0063] In addition, since the oil chamber 130 is arranged on the housing 110, the position of the oil chamber 130 is higher than the second oil pump 300, which can avoid the second oil pump 300 from being sucked empty due to vehicle shaking as much as possible, ensure the stable supply of lubricating oil to each kinematic pair, and improve the lubrication effect of the engine 1000.

[0064] like Fig.16 As shown, the oil pan 124 may be a dry type oil pan, and the dry type oil pan 124 has a small depth, which can reduce the depth of the oil pan 124 and the design size of the engine 1000, thereby facilitating the reasonable arrangement of other components of the vehicle.

[0065] Among them, Figure 1 and Figure 2 As shown, the first oil pump 200 is disposed between the oil pan 124 and the oil chamber 130, and the first oil pump 200 is used to pump the lubricating oil in the oil pan 124 into the oil chamber 130, and the second oil pump 300 is disposed between the oil chamber 130 and the oil outlet 140, and the second oil pump 300 is used to pump the lubricating oil in the oil chamber 130 into the oil outlet 140, and supply the lubricating oil to the surface of each kinematic pair through the oil outlet 140. That is, the engine 1000 of the present invention mainly utilizes the oil chamber 130 for oil storage and oil supply, and after the lubricating oil for lubricating the kinematic pair freely falls to the oil pan 124, the first oil pump 200 can pump it into the oil chamber 130, so the oil pan 124 does not need to store a large amount of oil.

[0066] Therefore, the present invention adopts a dual oil pump method, and the first oil pump 200 is used to pump the lubricating oil in the oil pan 124 into the oil chamber 130, so as to ensure that the oil storage in the oil chamber 130 is sufficient. The second oil pump 300 can pump the lubricating oil in the oil chamber 130 and supply it to the surface of each moving pair, thereby ensuring the lubrication effect of each moving pair. Moreover, compared with the single oil pump method, the dual oil pump method can at least avoid the problem of unstable oil pressure to a certain extent, and can ensure continuous and stable oil supply to each moving pair, thereby reducing the wear of each moving pair, improving the working stability of the engine 1000, and extending the service life of the engine 1000.

[0067] In addition, the oil chamber 130 configured in this way can at least to a certain extent reduce the impact of the vehicle's bumping and shaking on the lubricating oil, and can ensure that the oil chamber 130 continues to supply oil to the second oil pump 300.

[0068] According to a specific embodiment of the present invention, Figure 6 As shown, the oil chamber 130 includes: a first oil chamber 131 and a second oil chamber 132, the first oil pump 200 is connected to the first oil chamber 131, the first oil chamber 131 is connected to the second oil chamber 132, and the second oil pump 300 is arranged between the second oil chamber 132 and the oil outlet 140. In other words, the oil chamber 130 is composed of two connected oil chambers 130, so that the lubricating oil supplied by the first oil pump 200 first enters the first oil chamber 131, and then enters the second oil chamber 132 through the first oil chamber 131. The use of such a chamber separation method can effectively prevent the oil level in the second oil chamber 132 from fluctuating greatly when the all-terrain vehicle is on a bumpy road, turning, braking or accelerating. Therefore, the second oil pump 300 will not be cut off from oil in any driving state of the all-terrain vehicle, so that oil can be continuously supplied to each kinematic pair, and the lubrication effect of each kinematic pair can be guaranteed.

[0069] In addition, since the first oil chamber 131 is provided, the lubricating oil pumped by the first oil pump 200 first enters the first oil chamber 131, which can prevent this part of the lubricating oil from directly affecting the lubricating oil in the second oil chamber 132, and can make the lubricating oil in the second oil chamber 132 more stable, and can continuously and stably supply oil to the second oil pump 300.

[0070] Specifically, Figure 6As shown, the box body 110 includes: a main body 111, a first box cover 112 and a second box cover 113. The lateral surface of the main body 111 is formed with an open first oil chamber 131 and a second oil chamber 132. The first box cover 112 is arranged on the open side of the first oil chamber 131, and the second box cover 113 is arranged on the open side of the second oil chamber 132. In other words, two spaced oil chambers 130 are formed on the surface of the main body 111. The two oil chambers 130 can be spaced up and down on the lateral surface of the main body 111, and the two oil chambers 130 are both openly arranged, so that the sealing can be completed by the two spaced box covers. The two oil chambers 130 arranged in this way can occupy part of the outer space of the main body 111, so that the box body 110 can be more compact in structure and have more functions.

[0071] Among them, an annular sealing gasket may be arranged between the main body 111 and the corresponding box cover. The arrangement of the annular sealing gasket can avoid the leakage of lubricating oil and ensure the sealing of the oil chamber 130. The annular sealing gasket may be a rubber gasket.

[0072] like Figure 6 As shown, the lateral surface of the main body 111 is provided with a first inclined surface 116 and a second inclined surface 117 distributed from top to bottom, the first inclined surface 116 and the second inclined surface 117 are not coplanar, the first case cover 112 is provided on the first inclined surface 116, and the second case cover 113 is provided on the second inclined surface 117. In other words, the first oil chamber 131 is located above the second oil chamber 132, specifically, the first oil chamber 131 is located obliquely above the second oil chamber 132, and the two oil chambers 130 provided in this way can facilitate the first oil chamber 131 to supply oil to the second oil chamber 132, and can ensure that the second oil chamber 132 has sufficient lubricating oil, thereby further ensuring that the second oil chamber 132 can continuously and stably supply oil to each kinematic pair, and can avoid the occurrence of oil cut-off. In addition, the two case covers provided in this way can reasonably utilize the lateral space of the main body 111, and can make the overall layout of the crankcase 100 reasonable.

[0073] like Figure 6 As shown, a plurality of first oil holes 133 for connecting the first oil chamber 131 and the second oil chamber 132 are provided between the first oil chamber 131 and the second oil chamber 132. By providing a plurality of first oil holes 133, the lubricating oil in the first oil chamber 131 can flow smoothly into the second oil chamber 132, and the flow rate of the lubricating oil in the first oil chamber 131 can be reduced, which is conducive to maintaining the oil level of the lubricating oil in the second oil chamber 132 stable.

[0074] Specifically, Figure 6As shown, a plurality of first oil holes 133 are arranged at intervals in the length direction of the main body 111. The length direction of the main body 111 is the axial direction of the crankshaft. The arrangement of the plurality of first oil holes 133 can disperse the lubricating oil flowing from the first oil chamber 131 to the second oil chamber 132, and the plurality of first oil holes 133 arranged in this way can reasonably utilize the space at the lateral edge of the main body 111.

[0075] Among them, Figure 6 As shown, the shape of the first oil hole 133 has various forms, for example, the first oil hole 133 can be any one of a circular, elongated and L-shaped. Specifically, there can be three first oil holes 133. A first oil hole 133 located on one side can be circular, for example, an oblong, and the first oil hole 133 can reasonably utilize the space at one side edge of the main body 111. The first oil hole 133 located in the middle can be an elongated strip extending along the length direction of the main body 111, so that the middle space of the lateral edge of the main body 111 can be utilized. The first oil hole 133 located on the other side can be L-shaped, and the L-shaped first oil hole 133 can reasonably utilize the space at the other side edge of the main body 111.

[0076] According to a specific embodiment of the present invention, Figure 6 As shown, the main body 111 includes: a first main body 114 and a second main body 115, the second main body 115 is installed between the first main body 114 and the oil pan 124, the first main body 114 is formed with a first oil chamber 131 on the lateral surface, and the second main body 115 is formed with a second oil chamber 132 on the lateral surface. In other words, the main body 111 adopts a structure of a first main body 114 and a second main body 115 separated into upper and lower parts, which can facilitate the installation and fixing of the crankshaft and the balance shaft on the one hand, and can facilitate the respective arrangement of the first oil chamber 131 and the second oil chamber 132 on the other hand, thereby reducing the manufacturing difficulty of the main body 111, making the main body 111 structure reasonably arranged and having higher overall reliability.

[0077] Among them, Figure 6 As shown, each first oil hole 133 can be divided into two parts. For example, a portion of the first oil hole 133 is provided at the bottom of the first body 114 and the top of the second body 115, so that the portion located at the bottom of the first body 114 and the portion located at the top of the second body 115 constitute an integral first oil hole 133. It should be noted that the shapes of the portion of the first body 114 and the portion of the second body 115 can be the same, so that they can be conveniently arranged opposite each other.

[0078] The arrangement of the oil outlet passage 140 will be described in detail below with reference to the accompanying drawings.

[0079] like Figure 1 and Figure 7As shown, the oil outlet 140 includes: a first oil outlet 141, a first oil outlet pipe 142 and a second oil outlet 143. The first oil outlet 141 is connected to the second oil pump 300 and one end of the first oil outlet pipe 142, and the other end of the first oil outlet pipe 142 is connected to the second oil outlet 143. In other words, the first oil outlet pipe 142 is connected between the first oil outlet 141 and the second oil outlet 143. The oil inlet 141a of the first oil outlet 141 is used to connect with the oil outlet of the second oil pump 300, so that the second oil pump 300 can pump the lubricating oil in the second oil chamber 132 into the first oil outlet 141, and then enter the second oil outlet 143 through the first oil outlet pipe 142. The second oil outlet 143 can supply to the corresponding multiple kinematic pairs. By setting the first oil outlet pipe 142, the first oil outlet 141 and the second oil outlet 143 can be effectively connected, and the overall design difficulty of the oil outlet 140 can be reduced.

[0080] Among them, Figure 7 As shown, a pressure relief valve 144 is provided on the first oil outlet 141, and the pressure relief valve 144 is provided in the second oil chamber 132. It should be noted that when the oil pressure in the first oil outlet 141 is too high, the pressure relief valve 144 can be used for pressure relief, so as to ensure the oil supply stability of the oil outlet 140. Moreover, by providing the pressure relief valve 144 in the second oil chamber 132, the space in the second oil chamber 132 can be reasonably utilized, and part of the lubricating oil flowing out of the pressure relief valve 144 can flow directly into the second oil chamber 132. Fig. 9 As shown, the inner wall of the second oil chamber 132 is provided with a pressure relief valve mounting hole 126 , and the pressure relief valve 144 is mounted at the pressure relief valve mounting hole 126 .

[0081] Furthermore, combined with Fig.10 and Fig.11As shown, the crankcase 100 also includes: an oil filter 400, which is arranged on one side of the main body 111, and the oil outlet passage 140 includes a third oil outlet passage 145, and the third oil outlet passage 145 is connected to the first oil outlet pipe 142 and the oil filter 400, that is, the oil inlet 145a of the third oil outlet passage 145 is connected to the oil outlet of the first oil outlet pipe 142, and the oil outlet 145b of the third oil outlet passage 145 is connected to the oil inlet of the oil filter 400, and the oil filter 400 is also connected to the second oil outlet passage 143, that is, the oil filter 400 is connected to the oil inlet 143a of the second oil outlet passage 143. That is to say, the third oil outlet 145 and the oil filter 400 can be arranged between the first oil outlet pipe 142 and the second oil outlet 143, the third oil outlet 145 is used to supply oil to the oil filter 400, and the oil filter 400 can filter the lubricating oil. The oil filter 400 arranged in this way can provide pure lubricating oil to the second oil outlet 143, that is, to each moving pair, so as to ensure the lubrication effect of each moving pair. By arranging the oil filter 400 on one side of the main body 111, the space of the crankcase 100 can be reasonably utilized, and it can also be convenient for the oil filter 400 to supply oil to the second oil outlet 143 from one side of the second oil outlet 143.

[0082] Specifically, Fig.11 and Fig.14 As shown, the crankcase 100 further includes: a third case cover 118, which is arranged on one axial side of the main body 111, and the oil filter 400 is arranged on the third case cover 118. The third case cover 118 is provided with a fourth oil outlet 146 and a fifth oil outlet 147, the fourth oil outlet 146 is connected to the third oil outlet 145 and the oil filter 400, and the fifth oil outlet 147 is connected to the oil filter 400 and the second oil outlet 143. It can be understood that since the oil filter 400 is arranged on the third case cover 118, the third case cover 118 needs to be provided with corresponding oil passages, namely, the fourth oil outlet 146 and the fifth oil outlet 147, the fourth oil outlet 146 is connected to the oil inlet of the oil filter 400, and the fifth oil outlet 147 is connected to the oil outlet of the oil filter 400. Therefore, the entire oil outlet passage 140 is reasonably arranged, and the lubricating oil in the second oil chamber 132 can be effectively supplied to each kinematic pair through the connection of multiple oil outlet passages 140 .

[0083] Also, if Fig.11As shown, the third tank cover 118 is provided with a water pump shaft mounting hole 119, and a sixth oil outlet 148 for supplying lubricating oil to the pump shaft is provided between the fourth oil outlet 146 and the water pump shaft mounting hole 119. The water pump shaft mounting hole 119 is used to install the pump shaft, and the water pump shaft and the hole are provided with sliding friction. The sixth oil outlet 148 can supply part of the lubricating oil to the sliding friction pair, thereby ensuring continuous lubrication of the pump shaft and the hole, and reducing wear of the pump shaft and the hole.

[0084] like Figure 7 , Fig. 9 and Fig.10 As shown, the first oil outlet 141 extends in the first body 114 and the second body 115, and the second oil outlet 143 and the first oil outlet pipe 142 are arranged in the first body 114. That is to say, the first oil outlet 141 is essentially composed of two parts, the first part is arranged on the first body 114, and the second part is arranged on the second body 115. The oil outlet 141b of the first part is connected to the oil inlet of the first oil outlet pipe 142, and the oil inlet 141a of the second part is connected to the second oil pump 300. The second transfer port 141d of the first part and the first transfer port 141c of the second part are arranged opposite to each other, and then the first part and the second part are connected. The first part and the second part arranged in this way can be effectively connected, so that the lubricating oil pumped by the second oil pump 300 can be smoothly pumped into the second oil outlet 143.

[0085] The second part can be divided into three sections, the first section extends upward, the second section extends in the second main body 115 toward the second oil chamber 132 and forms a pressure relief valve mounting hole 126, in which the pressure relief valve 144 is mounted, and the third section continues to extend toward the first main body 114 and forms a first transfer port 141c. The first part can be divided into two sections, the first section extends obliquely, the lower end of the first section forms a second transfer port 141d, the first section extends toward the first oil chamber 131, and the second section changes the extension direction relative to the first section and forms the oil outlet 141b of the first oil outlet channel 141, so that it can be conveniently connected to the oil inlet of the first oil outlet pipe 142.

[0086] like Figure 7As shown, a crankshaft mounting hole 120 and a balance shaft mounting hole 121 are formed in the main body 111, and a part of the first oil outlet passage 141 is arranged between the crankshaft mounting hole 120 and the balance shaft mounting hole 121. The first section of the first part and the third section of the second part of the first oil outlet passage 141 are located between the crankshaft mounting hole 120 and the balance shaft mounting hole 121. The first oil outlet passage 141 arranged in this way can reasonably utilize the internal space of the main body 111. In the width direction of the main body 111, the crankshaft mounting hole 120, the first oil outlet passage 141, the balance shaft mounting hole 121 and the first oil hole 133 are arranged at intervals. The main body 111 arranged in this way can achieve higher space utilization and better reliability while ensuring the overall structure.

[0087] like Fig.10 As shown, the second oil outlet channel 143 is arranged in the first main body 114, the first oil outlet pipe 142 is arranged in the first oil chamber 131, and the oil outlet port 141b of the first oil outlet channel 141 and the oil inlet port 145a of the third oil outlet channel 145 are arranged in the first oil chamber 131 and connected with the first oil outlet pipe 142. By arranging the first oil outlet pipe 142 in the first oil chamber 131, on the one hand, the first oil outlet pipe 142 can be effectively protected, and on the other hand, the space in the first oil chamber 131 can be reasonably utilized. Moreover, the first oil outlet pipe 142 arranged in this way can supply lubricating oil from the middle part of the main body 111 to the axial edge position of the main body 111, so that the lubricating oil can enter the oil filter 400 for filtration. The first oil outlet pipe 142 arranged in this way effectively solves the problem of the direction of lubricating oil supply, and can reasonably utilize the space of the first main body 114, and the overall layout is more reasonable.

[0088] Alternatively, if Fig.10 As shown, both ends of the first oil outlet pipe 142 are detachably mounted in the first oil chamber 131. The detachable manner can avoid affecting the internal space of the first body 114, and can make the overall layout of the crankcase 100 reasonable.

[0089] Among them, Fig.12 and Fig.13As shown, the oil outlet passage 140 further includes: a seventh oil outlet passage 149 and an eighth oil outlet passage 150. The seventh oil outlet passage 149 is connected to the second oil outlet passage 143 and the crankshaft mounting hole 120, and the eighth oil outlet passage 150 is connected to the second oil outlet passage 143 and the balance shaft mounting hole 121. That is, the seventh oil outlet passage 149 is used to supply oil to the crankshaft mounting hole 120, and the eighth oil outlet passage 150 is used to supply oil to the balance shaft mounting hole 121. A crankshaft and a bearing bush sleeved on the crankshaft may be installed in the crankshaft mounting hole 120, and lubricating oil may be used to lubricate the crankshaft and the corresponding bearing bush. A balance shaft and a bearing bush sleeved on the balance shaft may be installed in the balance shaft mounting hole 121, and lubricating oil may be used to lubricate the balance shaft and the corresponding bearing bush, thereby ensuring the lubrication effect of the crankshaft and the balance shaft, and ensuring the working reliability of the crankshaft and the balance shaft.

[0090] Specifically, Fig.13 As shown, there are multiple crankshaft mounting holes 120 and balance shaft mounting holes 121, the axis of the second oil outlet 143 is parallel to the crankshaft axis of the engine 1000, the seventh oil outlet 149 and the eighth oil outlet 150 are multiple, and the multiple seventh oil outlets 149 and the multiple eighth oil outlets 150 are axially spaced, the multiple seventh oil outlets 149 correspond to the multiple crankshaft mounting holes 120, and the multiple eighth oil outlets 150 correspond to the multiple balance shaft mounting holes 121. For example, there are three crankshaft mounting holes 120 and balance shaft mounting holes 121, the seventh oil outlets 149 and the eighth oil outlets 150 are three, the three seventh oil outlets 149 correspond to the three crankshaft mounting holes 120, and the three eighth oil outlets 150 correspond to the three balance shaft mounting holes 121. As a result, each mounting hole provided with a bearing shell is provided with an oil outlet, so that lubricating oil can be supplied, and the lubrication effect of the kinematic pair can be guaranteed.

[0091] Alternatively, if Figure 3 As shown, a detachable oil quality monitoring tube 151 is provided on the first tank cover 112. The oil quality monitoring tube 151 is used to monitor the oil quality and height of the lubricating oil, so that the user can replenish and replace the lubricating oil in time, further ensure the lubrication effect of each moving pair, and extend the service life of the engine 1000.

[0092] like Figure 1 As shown, the oil inlet of the second oil pump 300 is provided with a first filter 310, and the first filter 310 is arranged in the second oil chamber 132. The first filter 310 plays a role in filtering lubricating oil, which can effectively protect the second oil pump 300 and prevent impurities from affecting each moving pair.

[0093] Also, if Figure 1As shown, the first filter screen 310 is cylindrical, and the axis of the first filter screen 310 is parallel to the crankshaft axis of the engine 1000. The first filter screen 310 thus configured can extend in the length direction of the second oil chamber 132, so that the lubricating oil in the second oil chamber 132 can enter the first filter screen 310 easily. Moreover, the first filter screen 310 thus configured can reasonably utilize the space in the second oil chamber 132. Fig. 9 As shown, a first filter screen installation hole 125 is provided at the middle position of the bottom of the second oil chamber 132 , and one end of the first filter screen 310 is installed at the first filter screen installation hole 125 .

[0094] Among them, the second oil pump 300 is located below the second oil chamber 132, and the lubricating oil passing through the first filter 310 can enter the second oil pump 300. The second oil pump 300 configured in this way can conveniently pump the lubricating oil in the second oil chamber 132, and can also reasonably utilize the space in the second main body 115.

[0095] According to a specific embodiment of the present invention, Figure 3 As shown, an oil inlet passage 160 is provided between the first oil pump 200 and the first oil chamber 131, and the oil inlet passage 160 is connected to an oil cooler 500, and the oil cooler 500 is provided between the oil inlet passage 160 and the first oil chamber 131. The oil cooler 500 can cool the lubricating oil, thereby cooling each kinematic pair, improving the working reliability of each kinematic pair, and further improving the working reliability of the engine 1000. The oil cooler 500 can be a water-cooled oil cooler 500.

[0096] Among them, by setting the oil cooler 500 in the oil inlet channel 160, the oil pressure of the lubricating oil pumped by the first oil pump 200 can be used to ensure the flow of the lubricating oil in the oil inlet channel 160 and the oil cooler 500, without losing the oil pressure of the lubricating oil pumped by the second oil pump 300, which can facilitate the smooth flow of the lubricating oil to the surface of each moving pair, thereby ensuring the lubrication effect of each moving pair and improving the working reliability of the engine 1000.

[0097] Optionally, the oil cooler 500 can be arranged on the first case cover 112 or the second case cover 113. The oil cooler 500 can be mainly arranged in the oil inlet passage 160. By arranging the oil cooler 500 on the first case cover 112 or the second case cover 113, the integration of the case cover can be increased, and there is no need to find a suitable installation position on the main body 111. The crankcase 100 arranged in this way has a reasonable structural design.

[0098] like Figure 3As shown, the second body 115 is provided with a first oil inlet passage 161 and a fourth oil inlet passage 164, the second tank cover 113 is provided with a second oil inlet passage 162 and a third oil inlet passage 163, the oil outlet of the first oil pump 200 and the oil inlet of the oil cooler 500 are connected through the first oil inlet passage 161 and the second oil inlet passage 162, and the oil outlet of the oil cooler 500 and the first oil chamber 131 are connected through the third oil inlet passage 163 and the fourth oil inlet passage 164. In other words, the first oil inlet passage 161 and the second oil inlet passage 162 communicate the oil outlet of the first oil pump 200 and the oil inlet of the oil cooler 500, and the third oil inlet passage 163 and the fourth oil inlet passage 164 communicate the oil outlet of the oil cooler 500 and the first oil chamber 131. The oil cooler 500 arranged in this way is reasonably arranged in position, so that the lubricating oil can pass through the oil cooler 500 smoothly, and the cooling effect of the oil cooler 500 is better.

[0099] Combination Figure 4 and Figure 5 As shown, the oil inlet 161a of the first oil inlet channel 161 is located at the bottom of the second main body 115, which can facilitate the connection of the oil outlet of the first oil pump 200. The oil outlet 161b of the first oil inlet channel 161 is located below the oil inlet 164a of the fourth oil inlet channel 164, which can facilitate the setting of the first oil inlet channel 161 and the fourth oil inlet channel 164, and can further facilitate the setting of the oil inlet and oil outlet positions of the oil cooler 500.

[0100] Furthermore, if Figure 3 As shown, the first main body 114 is provided with a first oil inlet pipe 165, and the first oil chamber 131 is connected with the fourth oil inlet passage 164 through the first oil inlet pipe 165. The first oil inlet pipe 165 is vertically arranged, and the upper end of the first oil inlet pipe 165 can be higher than the oil level of the first oil chamber 131, so that the reverse flow of the lubricating oil can be avoided, and the lubricating oil can flow to the second oil chamber 132.

[0101] like Figure 2 and Figure 6 As shown, the second tank cover 113 includes: a flat plate portion 122 and a raised portion 123, the raised portion 123 is arranged on one side of the flat plate portion 122, and the flat plate portion 122 is higher than the flat plate portion 122, and the oil cooler 500 is arranged on the flat plate portion 122. The arrangement of the raised portion 123 can at least increase the volume of the second oil chamber 132 to a certain extent, while the flat plate portion 122 can facilitate the installation and fixation of the oil cooler 500, which can also facilitate the docking of the oil inlet and the oil outlet of the oil cooler 500 with the second tank cover 113, thereby further improving the structural reliability of the engine 1000.

[0102] like Fig.15As shown, the first oil pump 200 and the second oil pump 300 are coaxially arranged, and the first oil pump 200 and the second oil pump 300 are provided with a common pump shaft. In other words, the first oil pump 200 and the second oil pump 300 share the same pump shaft, and the two are arranged axially, so that the volume of the oil pump assembly can be reduced, and each moving pair of the engine 1000 can be continuously and stably lubricated. In addition, the two oil pumps arranged in this way can effectively separate the oil inlet channel 160 and the oil outlet channel 140, so that the overall layout of the crankcase 100 can be reasonable.

[0103] The flow process of lubricating oil in the engine 1000 is described in detail below with reference to the accompanying drawings.

[0104] Taking the lubrication of the crankshaft as an example, the lubricating oil located in the oil pan 124 passes through: the second filter 210, the first oil pump 200, the first oil inlet channel 161, the second oil inlet channel 162, the oil cooler 500, the third oil inlet channel 163, the fourth oil inlet channel 164, the first oil inlet pipe 165, the first oil chamber 131, the first oil hole 133, the second oil chamber 132, the first filter 310, the second oil pump 300, the first oil outlet channel 141, the first oil outlet pipe 142, the third oil outlet channel 145, the fourth oil outlet channel 146, the oil filter 400, the fifth oil outlet channel 147, the second oil outlet channel 143 and the seventh oil outlet channel 149, and then flows to between the bearing and the crankshaft, so as to lubricate the crankshaft.

[0105] Taking the lubrication of the balance shaft as an example, the lubricating oil located in the oil pan 124 passes through: the second filter 210, the first oil pump 200, the first oil inlet channel 161, the second oil inlet channel 162, the oil cooler 500, the third oil inlet channel 163, the fourth oil inlet channel 164, the first oil inlet pipe 165, the first oil chamber 131, the first oil hole 133, the second oil chamber 132, the first filter 310, the second oil pump 300, the first oil outlet channel 141, the first oil outlet pipe 142, the third oil outlet channel 145, the fourth oil outlet channel 146, the oil filter 400, the fifth oil outlet channel 147, the second oil outlet channel 143 and the eighth oil outlet channel 150, and then flows to between the bearing and the balance shaft, so as to lubricate the balance shaft.

[0106] Taking the lubrication of the water pump shaft as an example, the lubricating oil located in the oil pan 124 passes through: the second filter 210, the first oil pump 200, the first oil inlet channel 161, the second oil inlet channel 162, the oil cooler 500, the third oil inlet channel 163, the fourth oil inlet channel 164, the first oil inlet pipe 165, the first oil chamber 131, the first oil hole 133, the second oil chamber 132, the first filter 310, the second oil pump 300, the first oil outlet channel 141, the first oil outlet pipe 142, the third oil outlet channel 145, the fourth oil outlet channel 146 and the sixth oil outlet channel 148, and then flows to between the hole and the water pump shaft, so as to lubricate the water pump shaft.

[0107] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0108] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An engine, characterized in that: include: A crankcase, the crankcase comprising: a case body and an oil pan, the oil pan being mounted at the bottom of the case body, an oil chamber and an oil outlet passage being formed in the case body, the oil chamber being in communication with the oil outlet passage; a first oil pump, the first oil pump being disposed between the oil pan and the oil chamber, and being used for pumping lubricating oil in the oil pan into the oil chamber; a second oil pump, the second oil pump being arranged between the oil chamber and the oil outlet passage; The oil outlet passage comprises a first oil outlet passage, a first oil outlet pipe and a second oil outlet passage, the first oil outlet passage is connected to the second oil pump and one end of the first oil outlet pipe, and the other end of the first oil outlet pipe is connected to the second oil outlet passage; The housing includes a main body, a lateral surface of which is formed with an open first oil chamber and a second oil chamber, a plurality of first oil holes for connecting the first oil chamber and the second oil chamber are arranged between the first oil chamber and the second oil chamber; a crankshaft mounting hole and a balance shaft mounting hole are formed in the main body, a portion of the first oil outlet passage is arranged between the crankshaft mounting hole and the balance shaft mounting hole; in the width direction of the main body, the crankshaft mounting hole, the first oil outlet passage, the balance shaft mounting hole and the first oil hole are arranged at intervals.

2. The engine according to claim 1, characterized in that The first oil pump is communicated with the first oil chamber, and the second oil pump is arranged between the second oil chamber and the oil outlet passage.

3. The engine according to claim 2, characterized in that The housing further includes a first housing cover and a second housing cover. The first housing cover is disposed on an open side of the first oil chamber, and the second housing cover is disposed on an open side of the second oil chamber.

4. The engine according to claim 3, characterized in that The lateral surface of the main body is provided with a first inclined surface and a second inclined surface distributed from top to bottom, the first inclined surface is not coplanar with the second inclined surface, the first box cover is provided on the first inclined surface, and the second box cover is provided on the second inclined surface.

5. The engine according to claim 1, characterized in that The plurality of first oil holes are arranged at intervals in the length direction of the main body.

6. The engine according to claim 5, characterized in that The main body includes: a first main body and a second main body, the second main body is installed between the first main body and the oil pan, the first oil chamber is formed on a lateral surface of the first main body, and the second oil chamber is formed on a lateral surface of the second main body.

7. The engine according to claim 1, characterized in that The first oil outlet passage is provided with a pressure relief valve, and the pressure relief valve is provided in the second oil chamber.

8. The engine according to claim 1, characterized in that Also includes: An oil filter is arranged on one side of the main body, and the main body is provided with a third oil outlet passage, the third oil outlet passage is connected with the first oil outlet pipe and the oil filter, and the oil filter is also connected with the second oil outlet passage.

9. The engine according to claim 8, characterized in that The crankcase also includes: a third case cover, the third case cover is arranged on one axial side of the main body, the oil filter is arranged on the third case cover, and the third case cover is provided with a fourth oil outlet passage and a fifth oil outlet passage, the fourth oil outlet passage is connected between the third oil outlet passage and the oil filter, and the fifth oil outlet passage is connected between the oil filter and the second oil outlet passage.

10. The engine according to claim 9, characterized in that The third tank cover is provided with a water pump shaft mounting hole; A sixth oil outlet passage for supplying lubricating oil to the pump shaft is arranged between the fourth oil outlet passage and the water pump shaft mounting hole.

11. The engine according to claim 9, characterized in that The main body includes: a first main body and a second main body, the second main body is installed between the first main body and the oil pan, the first main body is formed with the first oil cavity on the lateral surface, the second main body is formed with the second oil cavity on the lateral surface, the first oil outlet channel extends in the first main body and the second main body, and the second oil outlet channel and the first oil outlet pipe are arranged on the first main body.

12. The engine according to claim 11, characterized in that The second oil outlet passage is arranged in the first main body, the first oil outlet pipe is arranged in the first oil cavity, and the oil outlet of the first oil outlet passage and the oil inlet of the third oil outlet passage are arranged in the first oil cavity and connected with the first oil outlet pipe.

13. The engine according to claim 12, characterized in that Both ends of the first oil outlet pipe are detachably installed in the first oil chamber.

14. The engine according to claim 1, characterized in that The oil outlet passage further includes: a seventh oil outlet passage and an eighth oil outlet passage, the seventh oil outlet passage is connected to the second oil outlet passage and the crankshaft mounting hole, and the eighth oil outlet passage is connected to the second oil outlet passage and the balance shaft mounting hole.

15. The engine according to claim 14, characterized in that There are multiple crankshaft mounting holes and multiple balance shaft mounting holes, the axis of the second oil outlet is parallel to the axis of the crankshaft of the engine, there are multiple seventh oil outlets and multiple eighth oil outlets and they are axially spaced apart, the multiple seventh oil outlets correspond one-to-one to the multiple crankshaft mounting holes, and the multiple eighth oil outlets correspond one-to-one to the multiple balance shaft mounting holes.

16. The engine according to claim 2, characterized in that The oil inlet of the second oil pump is provided with a first filter screen, and the first filter screen is arranged in the second oil chamber.

17. The engine according to claim 16, characterized in that The first filter is cylindrical, and the axis of the first filter is parallel to the crankshaft axis of the engine.

18. The engine according to claim 2, characterized in that An oil inlet passage is provided between the first oil pump and the first oil chamber, and the oil inlet passage is connected to an oil cooler.

19. The engine according to claim 18, characterized in that The box body includes: a main body, a first box cover and a second box cover, the main body includes: a first main body and a second main body, the second main body is installed between the first main body and the oil pan, the first main body is formed with the first oil cavity on the lateral surface, the second main body is formed with the second oil cavity on the lateral surface, the first box cover is arranged on the first oil cavity, the second box cover is arranged on the second oil cavity, and the oil cooler is arranged on the second box cover.

20. The engine according to claim 19, characterized in that The second main body is provided with a first oil inlet passage and a fourth oil inlet passage, the second tank cover is provided with a second oil inlet passage and a third oil inlet passage, the oil outlet of the first oil pump and the oil inlet of the oil cooler are connected through the first oil inlet passage and the second oil inlet passage, and the oil outlet of the oil cooler and the first oil chamber are connected through the third oil inlet passage and the fourth oil inlet passage.

21. The engine according to claim 20, characterized in that The first main body is provided with a first oil inlet pipe, and the first oil chamber is communicated with the fourth oil inlet passage through the first oil inlet pipe.

22. An engine according to any one of claims 1 to 21, characterized in that The first oil pump and the second oil pump are coaxially arranged and have a common pump shaft.

23. An all-terrain vehicle, characterized in that: include: The engine of any one of claims 1 to 22.

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