CN212563449U - All-terrain vehicle and engine thereof - Google Patents

Abstract

The utility model discloses an all-terrain vehicle and engine thereof, the engine includes: a crankcase, the crankcase comprising: the crankshaft and the balance shaft are arranged in the box body and are in transmission; a water pump, the water pump comprising: the pump comprises a pump shaft, a shaft sleeve and an impeller, wherein the first axial end of the pump shaft is fixedly connected with a balance shaft or a crankshaft, the shaft sleeve is sleeved on the pump shaft, and the impeller is arranged at the second axial end of the pump shaft and abuts against the shaft sleeve so as to enable the impeller, the shaft sleeve and the pump shaft to rotate synchronously. From this, drive the pump shaft through the balance shaft and rotate, can improve the rotational speed of pump shaft, can further promote the pump water ability of impeller, the water pump can reduce the size of impeller correspondingly on guaranteeing the basis of enough pump water volume like this to can further reduce the volume of water pump, can be favorable to the miniaturized design target of engine, adopt the setting of axle sleeve to guarantee the installation reliability of impeller moreover, and improve the corrosion resistance of pump shaft.

Description

All-terrain vehicle and engine thereof

Technical Field

The utility model belongs to the technical field of the all-terrain vehicle technique and specifically relates to an all-terrain vehicle and engine thereof are related to.

Background

In a water-cooled engine, a water pump and an oil pump are generally arranged on one side of a crankcase, the water pump is used for cooling water circulation, the oil pump is used for lubricating oil circulation, driving wheels are generally arranged on an oil pump shaft and a water pump shaft, the two driving wheels are axially arranged at intervals and then driven by the driving wheels of a crankshaft.

When the engine is in an idling state, the rotating speed of the oil pump shaft is low, so that the rotating speed of the water pump shaft is low, the water pump cannot work normally, cooling water cannot circulate normally in a cooling water channel of the engine, the poor cooling of the engine is easy to cause, the working performance of the engine is affected, and the occupied space of the water pump is large. And with the increase of the rotating speed and the performance of the engine, the performance requirement of the water pump is higher and higher, wherein the requirements on the sealing performance and the cost of the water pump at high speed are higher and higher, and the water pump adopting the transmission mode cannot meet the requirements.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, an object of the utility model is to provide an all-terrain vehicle's engine, this engine can improve the rotational speed of water pump, can improve the water pumping ability to and can improve the corrosion resistance of pump shaft, reduce water pump volume and cost.

The utility model discloses an all terrain vehicle is further provided.

According to the utility model discloses an all-terrain vehicle's engine, include: a crankcase, the crankcase comprising: the crankshaft and the balance shaft are arranged in the box body and are in transmission; a water pump, the water pump comprising: the pump comprises a pump shaft, a shaft sleeve and an impeller, wherein the first axial end of the pump shaft is fixedly connected with the balance shaft or the crankshaft, the shaft sleeve is sleeved on the pump shaft, the impeller is arranged at the second axial end of the pump shaft and abuts against the shaft sleeve, and therefore the impeller, the shaft sleeve and the pump shaft rotate synchronously.

From this, drive the pump shaft through the balance shaft and rotate, can improve the rotational speed of pump shaft, can further promote the pump water ability of impeller, the water pump can reduce the size of impeller correspondingly on guaranteeing the basis of enough pump water volume like this to can further reduce the volume of water pump, can be favorable to the miniaturized design target of engine, adopt the setting of axle sleeve can guarantee the installation reliability of impeller moreover, also can make things convenient for the contact between other parts and the pump shaft.

In some examples of the present invention, the first axial end of the pump shaft is fixedly connected to the balance shaft, the first axial end of the balance shaft is provided with a groove extending axially, the first axial end of the pump shaft is provided with a projection extending axially, and the projection is fitted in the groove.

In some examples of the invention, the projection is clearance fit with the groove.

In some examples of the invention, the projection is a non-circular projection and the recess is a non-circular recess.

In some examples of the invention, the projection is flat block-shaped and the cross section is rectangular, and the groove is flat square groove and the cross section is rectangular.

The utility model discloses an in some examples, the pump shaft outer peripheral face is provided with the holding tank that circumference extends, be provided with the sealing washer in the holding tank, the sealing washer ends to the inner peripheral surface of axle sleeve.

In some examples of the invention, the pump shaft comprises: the impeller comprises a first shaft section and a second shaft section, wherein the first shaft section is connected with the second shaft section, the outer diameter of the first shaft section is larger than that of the second shaft section, a step is formed at the joint of the first shaft section and the second shaft section, and the shaft sleeve and the impeller are sleeved on the second shaft section.

In some examples of the present invention, the step is provided with a first washer, and the shaft sleeve abuts against the first washer.

In some examples of the invention, the axial second end of the pump shaft is provided with a second washer and a fastener, the fastener passes the second washer will the impeller is fixed at the axial second end of the pump shaft, the second washer is located the axial outside of the impeller.

The utility model discloses an in some examples, one side of box is fixed with the case lid, case lid integrated into one piece has the pump case of water pump, the pump case is provided with axial extension's via hole, the pump shaft wears to locate in the via hole.

In some examples of the invention, the engine further comprises: the oil blanket, the oil blanket cover is established just the butt is in on the axle sleeve on the internal perisporium of via hole, the axle sleeve is relative the oil blanket is rotatable.

In some examples of the present invention, the number of the oil seals is two, and two of the oil seals are provided at intervals in the axial direction.

In some examples of the invention, the engine further comprises: the generator is fixed on the axial second side of the crankcase and comprises a rotor shaft, and the rotor shaft is connected with the crankshaft and is collinear in axis.

According to the utility model discloses an all-terrain vehicle, include all-terrain vehicle's engine.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a perspective view of an engine according to an embodiment of the present invention;

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

FIG. 3 is a cross-sectional view taken along the line A-A in FIG. 2;

FIG. 4 is an enlarged view of region B of FIG. 3;

FIG. 5 is a perspective view of an engine according to an embodiment of the present invention, exploded at a seal cover;

FIG. 6 is an exploded view of the sealing cap and the second connecting tube;

FIG. 7 is an exploded view of the tank cover and pump cover;

FIG. 8 is a perspective view of the cover;

FIG. 9 is an exploded view of the balance and pump shafts.

Reference numerals:

an engine 1000;

a crankcase 100; a case 110; a second bonding surface 110 b; a case cover 111; a pump housing 112; a via 113; a macroporous section 113 a; a small hole section 113 b; an impeller cavity 114; a sealing cover 115; a recess 116; a water passage port 117; a second cooling channel 118; a cylinder water inlet port 119;

a crankshaft 120; a balance shaft 130; a recess 131; a pump cover 140; a water pump inlet port 141; a cylinder return water interface 142; an oil cooler water return interface 143;

a water pump 200; a pump shaft 210; a bump 211; a first shaft section 212; a second shaft section 213;

a shaft sleeve 220; an impeller 230; a seal ring 240; a first gasket 250; a second gasket 260; a fastener 270; an oil seal 280;

a generator 300; an oil cooler 400; an oil cooler water inlet pipe 410; an oil cooler return 420;

a cylinder 500; an exhaust port 510; a cylinder inlet pipe 600; a first connection pipe 610; and a second connection pipe 620.

Detailed Description

Embodiments of the present invention are described in detail below, and the embodiments described with reference to the drawings are exemplary.

An engine 1000 according to an embodiment of the present invention is described below with reference to fig. 1-9, the engine 1000 being applied to an all-terrain vehicle.

As shown in fig. 1 and 2, an engine 1000 according to an embodiment of the present invention may include: the power generation device comprises a crankcase 100, a cylinder 500 and a water pump 200, wherein the cylinder 500 is installed above the crankcase 100, the water pump 200 is installed on one axial side of the crankcase 100, namely one axial side, namely one side in the left-right direction, for example, the water pump 200 can be installed on the left side of the crankcase 100, wherein the right side of the crankcase 100 can be adjusted and arranged according to the power type of an all-terrain vehicle, for example, the all-terrain vehicle is a hybrid all-terrain vehicle, then the right side of the crankcase 100 can be provided with a generator 300, the generator 300 can be electrically connected with a motor, and the; as another example, the all-terrain vehicle is a pure fuel oil all-terrain vehicle, and the right side of the crankcase 100 may be provided with a transmission.

As shown in fig. 3, a plurality of transmission components may be disposed within the crankcase 100, including: the engine comprises a box body 110, a box cover 111, a crankshaft 120 and a balance shaft 130, wherein the crankshaft 120 and the balance shaft 130 are arranged in the box body 110, the box cover 111 is fixed on one side of the box body 110, a piston is arranged in a cylinder 500, and the piston and the crankshaft 120 are connected through a piston rod and a connecting rod, so that reciprocating motion of the piston can be converted into rotation of the crankshaft 120, the crankshaft 120 and the balance shaft 130 are in transmission, the balance shaft 130 can effectively smooth vibration of the engine 1000, and performance of the engine 1000 can be improved.

As shown in fig. 3, the water pump 200 includes: the pump comprises a pump shaft 210, a shaft sleeve 220 and an impeller 230, wherein a first axial end of the pump shaft 210 is fixedly connected with the balance shaft 130 or the crankshaft 120, namely, the right end of the pump shaft 210 is fixedly connected with the left end of the balance shaft 130, the shaft sleeve 220 is sleeved on the pump shaft 210, and the impeller 230 is arranged at a second axial end of the pump shaft 210, namely, the left end of the pump shaft 210. And the impeller 230 stops against the shaft sleeve 220, so that the impeller 230, the shaft sleeve 220 and the pump shaft 210 rotate synchronously. That is, the shaft sleeve 220 is fitted over the pump shaft 210 and then abuts against the impeller 230, so that the pump shaft 210, the impeller 230, and the shaft sleeve 220 can rotate synchronously, and the impeller 230 can agitate the cooling water around it, thereby allowing the cooling water to be supplied to the corresponding member to be cooled.

Therefore, the balance shaft 130 or the crankshaft 120 drives the pump shaft 210 to rotate, the rotating speed of the pump shaft 210 can be improved, the water pumping capacity of the impeller 230 can be further improved, and thus the size of the impeller 230 can be correspondingly reduced on the basis of ensuring enough water pumping capacity of the water pump 200, so that the size of the water pump 200 can be further reduced, the miniaturization design target of the engine 1000 can be facilitated, the installation reliability of the impeller 230 can be ensured by adopting the shaft sleeve 220, the corrosion resistance of the pump shaft 210 can be improved, and the contact between other components and the pump shaft 210 can be facilitated.

According to an optional embodiment of the present invention, as shown in fig. 4, the first axial end of the pump shaft 210 is fixedly connected to the balance shaft 130, the axial end of the balance shaft 130 is provided with a groove 131 extending axially, the first axial end (i.e. the right end) of the pump shaft 210 is provided with a projection 211 extending axially, the projection 211 is fitted in the groove 131, and the projection 211 is circumferentially limited by the groove 131. The matching mode of the groove 131 and the lug 211 is simple and reliable, circumferential limiting can be effectively carried out, and the transmission stability of the balance shaft 130 and the pump shaft 210 can be ensured. Wherein, the lug 211 can be for having the sheet structure of certain thickness, and the recess 131 also corresponds for having the rectangular form recess of certain thickness, can effectively guarantee like this that lug 211 and recess 131 are spacing in the circumference.

Wherein, the protrusion 211 and the groove 131 can be in clearance fit. The clearance fit can be convenient to assemble, and the phenomenon of jamming caused by the fact that the pump shaft 21 and the balance shaft 130 are not coaxial due to machining errors can be avoided, so that the transmission stability can be improved.

As shown in fig. 9, the protrusion 211 is a non-circular protrusion 211, the groove 131 is a non-circular groove 131, and the protrusion of the protrusion 211 and the groove 131 can be engaged with the groove 131, so that the balance shaft 130 and the pump shaft 210 can rotate synchronously, and the two are arranged coaxially.

Further, as shown in fig. 9, the protrusion 211 is flat and block-shaped, and the cross section of the protrusion 211 is rectangular, the groove 131 is flat and square, and the cross section of the groove 131 is rectangular. The projection 211 and the groove 131 which are arranged in this way are simple in structure and convenient to align during assembly, the structural reliability of the pump shaft 210 and the balance shaft 130 can be guaranteed, and the matching reliability of the two can be further improved.

Also, as shown in fig. 9, both ends in the width direction of the groove 131 are opened, and both ends in the width direction of the projection 211 are protruded out of both ends of the groove 131. That is to say, the length of the projection 211 in the width direction is greater than the length of the groove 131 in the width direction, so that the projection 211 and the groove 131 are stably matched, and the structural strength of the projection 211 is high, so that the projection 211 can be prevented from deforming in the transmission process.

Further, as shown in fig. 4, the outer circumferential surface of the pump shaft 210 is provided with a circumferentially extending receiving groove, that is, the receiving groove is annular, and the receiving groove is provided with a sealing ring 240, and the sealing ring 240 abuts against the inner circumferential surface of the shaft sleeve 220. That is, the sealing ring 240 is disposed between the pump shaft 210 and the shaft sleeve 220. By providing the sealing ring 240, a gap between the pump shaft 210 and the shaft sleeve 220 can be effectively sealed, and an inner cavity of the water pump 200 and an inner cavity of the crankcase 100 can be effectively spaced apart, so that reliability of the engine 1000 can be improved.

As shown in fig. 4, the pump shaft 210 includes: the first shaft section 212 is connected with the second shaft section 213, the outer diameters of the first shaft section 212 and the second shaft section 213 which are connected are different, the outer diameter of the first shaft section 212 is larger than that of the second shaft section 213, a step is formed at the connection position of the first shaft section 212 and the second shaft section 213, and the shaft sleeve 220 and the impeller 230 are sleeved on the second shaft section 213. Therefore, the step can limit the axial position of the shaft sleeve 220 and the impeller 230, and can prevent the shaft sleeve 220 and the impeller 230 from axially moving to at least a certain extent. The pump shaft 210 is convenient for the shaft sleeve 220 to be sleeved.

Further, as shown in fig. 4, a first washer 250 is disposed at the step, and the shaft sleeve 220 abuts against the first washer 250. Through the arrangement of the first gasket 250, a buffering effect can be achieved at the shaft sleeve 220 and the step, and the shaft sleeve 220 can be prevented from directly impacting the step of the pump shaft 210 during axial movement, so that the structural reliability of the water pump 200 can be ensured. Furthermore, the first gasket 250 may be attached to the inner sidewall of the pump housing 112 of the water pump 200, which may function as a seal at least to some extent.

Alternatively, as shown in fig. 4, the second axial end of the pump shaft 210 is provided with a second washer 260 and a fastener 270, the fastener 270 passes through the second washer 260 to fix the impeller 230 to the second axial end of the pump shaft 210, the second washer 260 abuts against the impeller 230, and the second washer 260 is located axially outward of the impeller 230. It can be understood that the end of the second shaft section 213 of the pump shaft 210 is provided with a threaded hole, and the fastening member 270 may be a bolt, and the bolt extends into the threaded hole after passing through the second washer 260, so that the fastening member 270 can fasten the impeller 230 and the shaft sleeve 220 on the second shaft section 213, thereby enabling the impeller 230 and the shaft sleeve 220 to rotate synchronously with the second shaft section 213, and ensuring the water pumping capability of the impeller 230. The second washer 260 may prevent the impeller 230 from directly contacting the fastener 270, and may effectively protect the impeller 230.

Referring to fig. 3 and 4, a pump case 112 of the water pump 200 is integrally formed on the case cover 111, the pump case 112 is provided with a through hole 113 extending in the axial direction, and the pump shaft 210 is inserted into the through hole 113. By integrally molding the pump case 112 on the case cover 111, the process of providing the pump case 112 and mounting the pump case 112 can be omitted, and the crankcase 100 and the water pump 200 can be structurally reliable. The via hole 113 can facilitate the pump shaft 210 to pass through and then be connected with the balance shaft 130, and through reasonably setting the inner diameter of the via hole 113, the cooling water can be prevented from entering the inner space of the box body 110 to at least a certain degree. It should be noted that, instead of being in transmission with the balance shaft 130, the first axial end of the pump shaft 210 may alternatively be in direct transmission with the crankshaft 120.

According to a specific embodiment of the present invention, as shown in fig. 4, the engine 1000 may further include: the oil seal 280, the oil seal 280 is sleeved on the shaft sleeve 220, the shaft sleeve 220 can rotate relative to the oil seal 280, and the periphery of the oil seal 280 is abutted against the inner peripheral wall of the through hole 113. Wherein the pump casing 112 further forms an impeller cavity 114 around the impeller 230, the impeller cavity 114 has cooling water flowing therein, and the impeller 230 can pump the cooling water in the impeller cavity 114 into the position of the component to be cooled through the interface. The oil seal 280 can perform a sealing function, and can also replace a water seal to separate the impeller cavity 114 from the inner space of the tank 110, and the oil seal 280 can be more suitable for working at a high rotation speed than the water seal, so that the water pump 200 can perform a better sealing effect. Also, the oil seal 280 is relatively low cost.

Specifically, as shown in fig. 4, the oil seals 280 are two, and the two oil seals 280 are provided at intervals in the axial direction. By providing two oil seals 280, the sealing effect of the water pump 200 can be improved to at least a certain extent, and the structure of the engine 1000 can be more reliable and stable. The two oil seals 280 may have different outer diameters, for example, the outer diameter of the oil seal 280 near the impeller 230 may be larger than the outer diameter of the oil seal 280 away from the impeller 230, which may allow for the size of the through-hole 113 to be accommodated and may also provide for better sealing of the water pump 200.

Specifically, as shown in fig. 4, the via 113 includes: the pump shaft comprises a large hole section 113a and a small hole section 113b, wherein the small hole section 113b is located on the inner side of the large hole section 113a, the small hole section 113b corresponds to a first shaft section 212 of the pump shaft 210, the small hole section 113b is in clearance fit with the first shaft section 212 of the pump shaft 210, so that the first shaft section 212 of the pump shaft 210 can freely rotate in the small hole section 113b, the large hole section 113a corresponds to a second shaft section 213 of the pump shaft 210, so that a certain accommodating space is formed between the inner peripheral wall of the large hole section 113a and the outer peripheral surface of the second shaft section 213 of the pump shaft 210 in the radial direction, and seals are conveniently arranged, for example, the oil seals 280 are arranged in the large hole section 113a, the two oil seals 280 are arranged at intervals in the axial direction of the large hole section 113a, for example, the two oil seals 280 are respectively adjacent to two axial ends of the large hole section 113a, and the oil seals 280 abut against. It can be understood that the oil seal 280 can be conveniently arranged by reasonably arranging the large hole section 113a and the second shaft section 213 of the pump shaft 210, and the oil seal 280 can isolate the impeller cavity 114 from the inner space of the box body 110 at the matching position of the two, prevent the moisture in the impeller cavity 114 from entering the box body 110, and ensure the sealing reliability of the engine 1000.

Further, the inner peripheral wall of the large hole section 113a is provided with an outer step portion at which one of the two oil seals 280 is stopped and an inner step portion at which the other of the two oil seals 280 is stopped. The arrangement of the outer step portion and the inner step portion can effectively improve the position reliability of the two oil seals 280 in the large hole section 113a, further improve the sealing effect of the oil seals 280, and ensure the sealing reliability of the engine 1000.

According to an alternative embodiment of the present invention, as shown in fig. 1 and 4, the oil cooler 400 is disposed outside the box 110, the impeller cavity 114 is formed outside the via hole 113 in the pump casing 112, and the impeller cavity 114 is connected to the oil cooler inlet pipe 410. The oil cooler 400 may cool the oil of some parts of the engine 1000, and the pump housing 112 may be provided with a port connected to the oil cooler water inlet pipe 410, and by forming the impeller chamber 114 in the pump housing 112, the arrangement of the impeller 230 may be facilitated, and the connection of the oil cooler water inlet pipe 410 may be facilitated. The oil cooler 400 is disposed on the front side or the rear side of the crankcase 100, an oil cooler return pipe 420 is further connected between the water pump 200 and the oil cooler 400, cold water in the impeller cavity 114 enters the oil cooler 400 through the oil cooler inlet pipe 410, fully exchanges heat with lubricating oil, reduces the temperature of the lubricating oil, and finally returns water to the impeller cavity 114 of the water pump 200 through the oil cooler return pipe 420.

In which the pump case 112 is located at the edge of the case cover 111, as shown in fig. 1. The pump casing 112 arranged in this way is reasonable in position arrangement, the difficulty in manufacturing the case cover 111 can be reduced, and the pump casing 112 can be matched with the pump shaft 210 and the impeller 230.

Alternatively, as shown in fig. 1, a cylinder water inlet pipe 600 is connected between the impeller cavity 114 and the cylinder 500, and the interface of the impeller cavity 114 connected with the cylinder water inlet pipe 600 is arranged obliquely above the impeller cavity 114, i.e. the interface is arranged obliquely above the position of the pump casing 112 corresponding to the impeller cavity 114. Through setting up cylinder inlet tube 600, impeller cavity 114 can be to the interior supply cooling water of cylinder 500 to can effectively reduce the operating temperature of cylinder 500 when engine 1000 is worked, can be so that engine 1000 is in reasonable operating temperature interval, and through setting up the interface in impeller cavity 114's oblique top, can make things convenient for the connection between cylinder 500 and the impeller cavity 114, can reduce the length of cylinder inlet tube 600, can also further simplify the degree of difficulty of arranging of cylinder inlet tube 600 like this.

According to an embodiment of the present invention, as shown in fig. 1 and 4, the case cover 111 is recessed toward the inner space to form a pump case 112, and a pump cover 140 is fixed to the outer side of the pump case 112. By forming the pump case 112 by being recessed inward, the pump case 112 having a sufficient space can be formed at the cover 111, the impeller 230 and the pump shaft 210 can be disposed in the pump case 112, and the outer pump cover 140 can effectively cover the space of the pump case 112, so that the sealing performance of the water pump 200 can be ensured.

As shown in fig. 8, the cover 111 is provided with an annular edge extending outward at the outer periphery of the through hole 113, the annular edge defining the impeller cavity 114, and at least a portion of the impeller 230 is received in the impeller cavity 114. That is, the cover 111 may have an annular edge extending from an outer surface thereof at a position surrounding the through hole 113, and the annular edge may define an impeller cavity 114 for accommodating the impeller 230, so that the pump casing 112 may have a simple structure, may reduce difficulty in molding the cover 111, and may effectively accommodate the impeller 230.

Also, as shown in fig. 8, the case cover 111 is further provided with a cylinder water inlet port 119 at one side of the annular edge, and the cylinder water inlet port 119 is communicated with the impeller chamber 114. That is to say, the pump case 112 is integrally formed on the case cover 111, and on the basis, the cylinder water inlet port 119 is integrally formed, so that the cylinder water inlet port 119 does not need to be supplemented to the pump case 112, the structure of the engine 1000 can be further simplified, and the structure of the water pump 200 can be more reliable.

Specifically, as shown in fig. 1, the pump cover 140 is provided with a water inlet interface 141 of the water pump, a water return interface 142 of the air cylinder, and a water return interface 143 of the oil cooler, the water inlet interface 141 of the water pump, the water return interface 142 of the air cylinder, and the water return interface 143 of the oil cooler are communicated, the pump cover 140 is further provided with a reinforcing rib, and the reinforcing rib extends from the edge of the pump cover 140 to the connection of the water inlet interface 141 of the water pump, the water return interface 142 of the air cylinder. Thus, pump cap 140 integrates three ports, which allow cooling water to enter impeller cavity 114 and supply the respective components for cooling. The arrangement of the reinforcing ribs can improve the reliability of the pump cover 140 and the reliability of the three interfaces in the pump cover 140, so that the reliability of the engine 1000 can be further improved.

Optionally, a visual tube is also provided on pump casing 112, one end of the visual tube communicates with impeller cavity 114, and the other end is closed. The visible pipe is a transparent pipe through which the outside can directly see the internal cooling water, so that a user can conveniently monitor the water quality in the water pump 200, the water quality in the whole circulation loop can be known, the user can conveniently replace the cooling water in time, and the working stability of the engine 1000 can be guaranteed.

The structure and process of the water pump 200 for supplying the cooling water to the cylinder 500 will be described in detail with reference to the accompanying drawings.

As shown in fig. 1, the cylinder 500 is provided with a gas discharge port 510 for discharging gas and a first cooling passage (not shown) connected to the gas discharge port 510, in which cooling water flows, and a cylinder bore is formed in the cylinder 500, the first cooling passage being disposed around the cylinder bore. The top of the crankcase 100 is spaced a predetermined distance from the exhaust port 510, that is, as shown in fig. 1, the top of the crankcase 100 is spaced a predetermined distance from the exhaust port 510 in the up-down direction, and thus, is spaced a predetermined distance from the exhaust pipe.

One end of the cylinder water inlet pipe 600 is connected with the water pump 200, the cylinder water inlet pipe 600 is attached and fixed on the crankcase 100, and the other end of the cylinder water inlet pipe 600 is communicated with the first cooling channel. Cylinder inlet tube 600 pastes and establishes and fix on crankcase 100, can further make effectively spaced apart between cylinder inlet tube 600 and the blast pipe like this, can increase the interval distance between the two effectively to can avoid high temperature blast pipe to influence microthermal cylinder inlet tube 600, can further improve engine 1000's cooling effect, and then can guarantee engine 1000's operational reliability, and can promote engine 1000's fuel efficiency. The crankcase of the water inlet pipe does not need to be spaced by an effective distance like the crankcase of the water inlet pipe in the prior art, and the space is limited, so that the exhaust pipe is easy to approach.

Specifically, the crankcase 100 includes a second cooling passage 118, and the second cooling passage 118 communicates with the first cooling passage, that is, cooling water flows between the second cooling passage 118 and the first cooling passage, and the cooling water in the second cooling passage 118 can be supplied to the first cooling passage. That is, the cylinder water inlet pipe 600 is not directly communicated with the first cooling channel, but is communicated with the second cooling channel 118, the cooling water pumped out from the water pump 200 needs to pass through the cylinder water inlet pipe 600 and the second cooling channel 118 in sequence and then enter the first cooling channel for cooling, and the cooling water in the first cooling channel can also flow back to the water pump 200.

From this, cylinder inlet tube 600 need not to contact with cylinder 500, and it can carry out the transfer of cooling water through second cooling passage 118, can separate apart through second cooling passage 118, reduces the influence of high temperature exhaust to the inlet tube, can further improve engine 1000's cooling effect, and then can guarantee engine 1000's operational reliability to and can promote engine 1000's fuel efficiency.

Alternatively, as shown in fig. 1, the cylinder inlet pipe 600 includes: the first connection pipe 610 is bent, two ends of the first connection pipe 610 are respectively connected with one ends of the water pump 200 and the second connection pipe 620, the second connection pipe 620 is attached to the outer surface of the crankcase 100, and the second connection pipe 620 extends obliquely. Through setting up first connecting pipe 610 with buckling, can change its trend, can make it effectively connect between water pump 200 and second connecting pipe 620 like this, can be favorable to second connecting pipe 620 to paste moreover and establish the surface of fixing at crankcase 100 to can keep away from the blast pipe better, can improve the effect that the cooling water cooled engine 1000. The second connection pipe 620, which is disposed obliquely, may also further reduce its extension length, which may better connect the second cooling passage 118.

Wherein, as shown in fig. 1, the tube wall of the second connection tube 620 is provided with an opening, which is closed by the crankcase 100. That is, the second connection pipe 620 is provided with an opening opened toward the crankcase 100, and the crankcase 100 closes the opening. That is, the second connection pipe 620 is not only opened at both ends, but also opened at one side facing the crankcase 100, both ends are mainly used for connecting the first connection pipe 610 and the second cooling passage 118, and opened at one side facing the crankcase 100, so that it is convenient for the fixed connection with the top of the crankcase 100, and it can be more flattened, the exhaust pipe can be better kept away, and the temperature of the cylinder 500 can be better reduced. Wherein, a gasket is disposed between the open side of the second connection pipe 620 facing the top of the crankcase 100 and the top of the crankcase 100, and the gasket can effectively seal the gap therebetween and avoid the leakage of the cooling liquid. The sealing gasket is a rubber gasket. Of course, the second connection pipe 620 may be arranged in other ways, for example, the side of the second connection pipe 620 facing the crankcase 100 may be provided with a sealing bottom wall having a bottom plane, which may flatly abut against the top wall of the crankcase 100.

Specifically, the first connection pipe 610 may be a rubber pipe, and the second connection pipe 620 may be an aluminum alloy pipe. The rubber tube is easily out of shape, can buckle the setting, also can connect water pump 200's impeller cavity 114 and second connecting pipe 620 well, and will be close to the second connecting pipe 620 of gas vent 510 and set to aluminium alloy pipe, and aluminium alloy pipe structural strength is high, does not take place high temperature deformation like the rubber tube receives blast pipe temperature influence easily, and aluminium alloy pipe can paste better moreover and establish the top of fixing at crankcase 100.

Alternatively, as shown in fig. 1, the crankcase 100 includes: the air cylinder 500 includes a case 110 and a sealing cover 115, the sealing cover 115 is disposed on the top of the case 110, the sealing cover 115 is spaced apart from the air cylinder 500, and a second connection pipe 620 is attached to the sealing cover 115. The sealing cover 115 may be fixed to the case 110 by a fastening member 270, and of course, the cylinder 500 may be fixed directly above the case 110, and the sealing cover 115 may be disposed diagonally above the case 110. And by providing the sealing cover 115, the difficulty of arranging the second connecting pipe 620 in the crankcase 100 can be further reduced, and the second connecting pipe 620 can be easily arranged and fixed on the sealing cover 115.

The sealing cover 115 may be an aluminum alloy cover. From this, sealed lid 115 and second connecting pipe 620 have all adopted the same material, and aluminum alloy material structural strength is high, and the radiating effect is good moreover, sets up the heat dissipation that can further be convenient for the cooling water like this, can improve engine 1000's cooling effect.

Alternatively, as shown in fig. 5 and 6, the sealing cover 115 is provided with a recess 116 in corresponding communication with the opening. The recess 116 may further enlarge the size of the second connection pipe 620, and may also reduce the height of the second connection pipe 620 protruding from the crankcase to some extent, so that a greater amount of cooling water may flow between the second connection pipe 620 and the recess 116, and by providing the recess 116, the height of the second connection pipe 620 may be reduced to at least some extent, so that it is further away from the exhaust pipe.

Further, as shown in fig. 5 and 6, the sealing cap 115 is provided with a water passage port 117, and the water passage port 117 communicates between the second connection pipe 620 and the second cooling passage 118. Accordingly, the connection structure between the second connection pipe 620 and the second cooling passage 118 may be further simplified, and the flow of cooling water therebetween may be facilitated. As shown in fig. 5, the case 110 has a first coupling surface coupled to the cylinder 500 and a second coupling surface 110b coupled to the sealing cap 115, the second cooling passage 118 has a water inlet formed at the second coupling surface 110b and a water outlet formed at the first coupling surface, and the water inlet is formed at a side of the second coupling surface 110b adjacent to the first coupling surface. The volume of the second cooling channel 118 is smaller, the space occupied by the second cooling channel can be reduced, the communication path between the second cooling channel and the first cooling channel can be shortened, and the water path arrangement can be more reasonable.

The end of the first connection pipe 610 is fitted over the end of the second connection pipe 620, and a collar is provided outside the end of the first connection pipe 610. The mode of adopting the bell and spigot joint on the one hand is easy to assemble, and on the other hand can guarantee the connection leakproofness of first connecting pipe 610 and second connecting pipe 620, and wherein the setting of clamp can also make the tip of first connecting pipe 610 and the tip of second connecting pipe 620 fixed reliable.

As shown in fig. 3, the engine 1000 may further include: and the generator 300 is fixed on the axial second side of the crankcase 100, and the generator 300 comprises a rotor shaft which is connected with the crankshaft 120 and is collinear with the axis. It can be understood that when the engine 1000 is operated, the crankshaft 120 rotates, the rotor shaft rotates therewith to generate electricity, the generator 300 may be connected with a power battery and a motor, and the electricity generated by the generator 300 may be directly supplied to the motor to operate, thereby implementing hybrid operation and reducing oil consumption of the all-terrain vehicle.

According to the utility model discloses full all terrain vehicle, including the full all terrain vehicle's of above-mentioned embodiment engine 1000.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features. In the description of the present invention, "a plurality" means two or more. In the description of the present invention, the first feature "on" or "under" the second feature may include the first and second features being in direct contact, and may also include the first and second features being in contact with each other not directly but through another feature therebetween. In the description of the invention, the first feature being "on", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (14)

1. An all terrain vehicle engine, comprising:

a crankcase, the crankcase comprising: the crankshaft and the balance shaft are arranged in the box body and are in transmission;

a water pump, the water pump comprising: the pump comprises a pump shaft, a shaft sleeve and an impeller, wherein the first axial end of the pump shaft is fixedly connected with the balance shaft or the crankshaft, the shaft sleeve is sleeved on the pump shaft, the impeller is arranged at the second axial end of the pump shaft and abuts against the shaft sleeve, and therefore the impeller, the shaft sleeve and the pump shaft rotate synchronously.

2. The all-terrain vehicle engine of claim 1, characterized in that an axial first end of the pump shaft is fixedly connected with the balance shaft, the axial first end of the balance shaft is provided with an axially extending groove, the axial first end of the pump shaft is provided with an axially extending projection, and the projection fits within the groove.

3. The all-terrain vehicle engine of claim 2, characterized in that the projection is clearance fit with the recess.

4. The all-terrain vehicle engine of claim 2, characterized in that the projections are non-circular projections and the recesses are non-circular recesses.

5. The all-terrain vehicle engine of claim 4, characterized in that the projection is in the shape of a flattened block and rectangular in cross-section, and the recess is in the shape of a flattened square slot and rectangular in cross-section.

6. The all-terrain vehicle engine of claim 1, characterized in that the outer peripheral surface of the pump shaft is provided with a circumferentially extending receiving groove, and a sealing ring is disposed in the receiving groove and abuts against the inner peripheral surface of the shaft sleeve.

7. The all-terrain vehicle engine of claim 1, characterized in that the pump shaft comprises: the impeller comprises a first shaft section and a second shaft section, wherein the first shaft section is connected with the second shaft section, the outer diameter of the first shaft section is larger than that of the second shaft section, a step is formed at the joint of the first shaft section and the second shaft section, and the shaft sleeve and the impeller are sleeved on the second shaft section.

8. The all-terrain vehicle engine of claim 7, characterized in that a first washer is disposed at the step, the bushing resting against the first washer.

9. The all-terrain vehicle engine of claim 7, characterized in that the second axial end of the pump shaft is provided with a second washer through which the fastener passes to secure the impeller at the second axial end of the pump shaft, and a fastener, the second washer being located axially outward of the impeller.

10. The all-terrain vehicle engine of claim 1, characterized in that a cover is secured to one side of the housing, the cover integrally forming a pump housing for the water pump, the pump housing being provided with an axially extending through hole, the pump shaft being disposed through the through hole.

11. The all-terrain vehicle engine of claim 10, further comprising: the oil blanket, the oil blanket cover is established just the butt is in on the axle sleeve on the internal perisporium of via hole, the axle sleeve is relative the oil blanket is rotatable.

12. The all terrain vehicle engine of claim 11 wherein there are two of said oil seals, and wherein two of said oil seals are axially spaced apart.

13. The all-terrain vehicle engine of claim 1, further comprising: the generator is fixed on the axial second side of the crankcase and comprises a rotor shaft, and the rotor shaft is connected with the crankshaft and is collinear in axis.

14. An all-terrain vehicle, characterized in that it comprises an engine of an all-terrain vehicle as claimed in any of claims 1 to 13.

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