All-terrain vehicle

Abstract

The all-terrain vehicle comprises a vehicle frame, a walking system, a transmission system and a power system, the walking system is at least partially connected with the vehicle frame, the transmission system comprises a transmission shaft basically arranged in the length direction of the vehicle frame, the transmission shaft is in transmission connection to the walking system, and the power system comprises an engine and a speed change mechanism. The engine comprises a crankshaft in transmission connection with the speed change mechanism, the speed change mechanism is in transmission connection to the transmission shaft, and the rotation center line of the crankshaft extends in the width direction of the frame. The all-terrain vehicle is good in structure compactness.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of vehicle technology, in particular to an all-terrain vehicle. BACKGROUND

[0002] An all-terrain vehicle refers to a vehicle that can travel on various terrains. The all-terrain vehicle can be used for road off-road, competition and freight. Specific models are, for example, SSV (Side by Side Vehicle) and UTV (Utility Vehicle). Most all-terrain vehicles have high requirements for the compactness of the power system inside the vehicle, therefore, how to improve the compactness of the power system in the whole vehicle is a problem to be solved. SUMMARY

[0003] In order to solve the problems of the prior art, the purpose of the present application is to provide an all-terrain vehicle, which has a compact structure of the power system in the whole vehicle.

[0004] To achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows:

[0005] An all-terrain vehicle, comprising a vehicle frame, a running system, a transmission system and a power system, the running system being at least partially connected to the vehicle frame, the transmission system comprising a transmission shaft arranged along the front-rear direction of the vehicle frame, the transmission shaft being drivingly connected to the running system, the power system being supported by the vehicle frame, the power system comprising a transmission mechanism and an engine, the transmission mechanism comprising a gear assembly and a continuously variable transmission; the vehicle frame comprises a bottom frame, the engine is located above the bottom frame and comprises a crankshaft; the gear assembly is drivingly connected to the transmission shaft; the continuously variable transmission comprises a driving wheel, a driven wheel and a transmission member, the transmission member being wrapped around the periphery of the driving wheel and the driven wheel, the crankshaft of the engine being drivingly connected to the driving wheel, the transmission member driving the driven wheel to rotate under the drive of the driving wheel, the driven wheel being drivingly connected to the gear assembly; the center line of rotation of the crankshaft extends along the left-right direction of the vehicle frame, the engine and the transmission shaft do not overlap along the up-down direction of the vehicle frame; the transmission member is a steel chain or a steel belt.

[0006] Further, the engine and the transmission shaft are arranged in a spaced manner along the left-right direction of the vehicle frame; a plane perpendicular to the left-right direction of the vehicle frame and passing through the center of the width of the vehicle frame is defined as a longitudinal plane, along the left-right direction of the vehicle frame, the engine and the transmission shaft are located on the two sides of the longitudinal plane respectively.

[0007] Further, the transmission member is a steel belt.

[0008] Further, the all-terrain vehicle further comprises a fuel tank supported by the vehicle frame, a plane perpendicular to the left-right direction of the vehicle frame and passing through the center of the width of the vehicle frame is defined as a longitudinal plane; along the left-right direction of the vehicle frame, the engine and the fuel tank are located on one side of the longitudinal plane, and the transmission mechanism is located on the other side of the longitudinal plane.

[0009] Further, the engine is arranged in a state of gradually inclining from top to bottom towards the direction of approaching or moving away from the transmission mechanism, so that the engine and the bottom frame together define a first accommodation space for accommodating parts, and at least part of the gear assembly is located in the first accommodation space.

[0010] Further, the transmission mechanism includes a gear assembly, and the lowest point of the engine and the lowest point of the gear assembly are spaced apart in the up-down direction of the frame by a distance ranging from 0 mm to 50 mm.

[0011] Further, the all-terrain vehicle includes a turbocharger and an exhaust assembly, the turbocharger is connected between the engine and the exhaust assembly, and the turbocharger and the exhaust assembly are located above the gear assembly in the up-down direction of the frame; in a plane perpendicular to the up-down direction of the frame, part of the projection of the gear assembly overlaps the projection of the engine, and another part of the projection of the gear assembly at least partially overlaps the projection of the turbocharger and / or the exhaust assembly.

[0012] Further, in the front-rear direction of the frame, the upper side of the engine defines a second accommodation space; in the front-rear direction of the frame, the second accommodation space and the first accommodation space are respectively located on the front and rear sides of the engine; the all-terrain vehicle includes an intake manifold, and the intake manifold is located in the second accommodation space.

[0013] Further, the engine and the gear assembly are arranged in the front-rear direction of the frame, and the engine is in front or the gear assembly is in front; in the left-right direction of the frame, part of the continuously variable transmission is located on one side of the engine, and another part of the continuously variable transmission is located on one side of the gear assembly; the gear assembly is provided with a rear wheel output portion, the rear wheel output portion is in transmission connection with the rear wheels of the running system, and an output shaft axis of the rear wheel output portion is substantially parallel to the left-right direction of the frame.

[0014] Further, in a plane perpendicular to the crankshaft axis, the included angle between the connecting line of the projection of the crankshaft axis and the projection of the output shaft axis of the rear wheel output portion and any horizontal plane ranges from 6° to 11°.

[0015] The present application can make the power system compactly arranged in the front-rear direction and the up-down direction of the frame by appropriately occupying the space of the frame in the left-right direction, which is beneficial to the spatial arrangement of the vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The structure diagram of the all-terrain vehicle provided by the present application is shown;

[0017] Figure 2 The partial structure schematic diagram of the all-terrain vehicle provided by the present application is shown.

[0018] Figure 3 Connection relationship diagram of power system and transmission system of an implementation mode of the all-terrain vehicle provided in the present application;

[0019] Figure 4 Structure schematic diagram of the power system of an implementation mode of the all-terrain vehicle provided in the present application;

[0020] Figure 5 Another perspective structure schematic diagram of the power system of an implementation mode of the all-terrain vehicle provided in the present application;

[0021] Figure 6 Position relationship schematic diagram of the power system and the transmission shaft of an implementation mode of the all-terrain vehicle provided in the present application;

[0022] Figure 7 Position relationship diagram of the power system and the transmission shaft of another implementation mode of the all-terrain vehicle provided in the present application;

[0023] Figure 8 Cooperation relationship diagram of the power system and the surrounding components of an implementation mode of the all-terrain vehicle provided in the present application;

[0024] Figure 9 Cooperation relationship diagram of the power system and the surrounding components of another implementation mode of the all-terrain vehicle provided in the present application;

[0025] Figure 10 Structure schematic diagram of the power system and the surrounding components of an implementation mode of the all-terrain vehicle provided in the present application;

[0026] Figure 11 Part structure schematic diagram of the all-terrain vehicle provided in the present application;

[0027] Figure 12 Top view state sectional schematic diagram of the power system of an implementation mode of the all-terrain vehicle provided in the present application;

[0028] Figure 13 is Figure 12 Sectional schematic diagram at A-A in the middle;

[0029] Figure 14 Structure schematic diagram of the power system of an implementation mode of the all-terrain vehicle provided in the present application;

[0030] Figure 15 Position relationship diagram of the power system and the transmission shaft of an implementation mode of the all-terrain vehicle provided in the present application;

[0031] Figure 16A power system and a transmission shaft position relationship diagram of another implementation of the all-terrain vehicle provided in the present application;

[0032] Figure 17 A power system and surrounding components cooperation relationship diagram of an implementation of the all-terrain vehicle provided in the present application;

[0033] Figure 18 A power system and surrounding components cooperation relationship diagram of another implementation of the all-terrain vehicle provided in the present application;

[0034] Figure 19 A power system and surrounding components structure diagram of an implementation of the all-terrain vehicle provided in the present application. DETAILED DESCRIPTION

[0035] In order to make the personnel in the art better understand the scheme of the present application, the technical scheme in the specific implementation of the present application will be clearly and completely described below in combination with the drawings in the implementation of the present application.

[0036] Reference Figure 1 and Figure 2 The present application provides an all-terrain vehicle 100, which comprises a vehicle frame 11, a vehicle body cover 12, a walking system 13, a transmission system 14 and a power system 15. The vehicle body cover 12 is connected to the vehicle frame 11 and at least partially covers the outer periphery of the vehicle frame 11. The walking system 13 is at least partially connected to the vehicle frame 11. The power system 15 comprises an engine 151 supported by the vehicle frame 11 and used to provide power. The transmission system 14 is arranged on the vehicle frame 11 and used to at least partially transmit the power generated by the power system 15 to the walking system 13 to drive the walking system 13 to move. The vehicle frame 11 comprises a front vehicle frame 111 and a rear vehicle frame 112. The walking system 13 comprises two front wheels 131 and two rear wheels 132. The front wheels 131 are arranged on the front vehicle frame 111, and the rear wheels 132 are arranged on the rear vehicle frame 112.

[0037] The all-terrain vehicle 100 provided by the application can be a SSV (Side by Side Vehicle). In the state of driving along the front, the rotation center line of the front wheel 131 is defined as the first wheel axis 1311, and the rotation center line of the rear wheel 132 is defined as the second wheel axis 1321. The first wheel axis 1311 is parallel to the second wheel axis 1321, and the distance between them is L. According to different vehicle models or vehicle types, the distance L is generally in the range of 2060mm to 2300mm. One of the characteristics of the SSV all-terrain vehicle 100 is that the overall vehicle is more compact than the overall vehicle of a general passenger car. Therefore, the space inside the all-terrain vehicle 100 and the space for installing parts are relatively small, so the parts need to be arranged as compactly as possible. By tilting the engine 151, not only can the space occupied by the entire power system 15 in the front-rear direction and the up-down direction of the vehicle frame 11 be reduced, but also a certain space can be defined for accommodating various parts to reduce the overall installation size, and ultimately achieve the compact arrangement of the entire vehicle.

[0038] It should be noted that the length direction of the vehicle frame 11 of the all-terrain vehicle 100 is defined as the front-rear direction, the width direction of the vehicle frame 11 of the all-terrain vehicle 100 is defined as the left-right direction, and the height direction of the vehicle frame 11 of the all-terrain vehicle 100 is defined as the up-down direction. In order to clearly illustrate the technical solutions of the application, the front, rear, left, right, up and down are also defined in the Figure 1

[0039] Reference Figure 3 and Figure 4 , the power system 15 further comprises a transmission mechanism 152. As an implementation manner, the transmission mechanism 152 comprises a gear assembly 1521 and a continuously variable transmission 1522 (CVT). The gear assembly 1521 specifically comprises a structure containing a reduction gear set. The engine 151, the continuously variable transmission 1522 and the gear assembly 1521 are connected in sequence, and the power is generated by the engine 151 and finally outputted outward by the gear assembly 1521. As an implementation manner, the transmission mechanism 152 can only comprise the gear assembly 1521, which is directly connected to the engine 151 by the gear assembly 1521. The power system 15 can also comprise a motor or other driving device.

[0040] ​As an implementation, the all-terrain vehicle 100 provided by the application has a four-wheel drive mode, and the output part of the gear assembly 1521 is provided with at least two, which are a first output part 1521a and a second output part 1521b. The transmission system 14 includes a front axle 141, a transmission shaft 142, and a rear axle 143. The front axle 141 is installed on the front frame 111 and is in driving connection with the front wheel 131. The transmission shaft 142 is connected between the front axle 141 and the first output part 1521a of the gear assembly 1521, and is used to at least partially transmit the power output by the power system 15 to the front wheel 131. The rear axle 143 is integrated on the gear assembly 1521 and is in driving connection with the rear wheel 132. Specifically, the transmission mechanism 152 includes a box body, a cavity is formed in the box body, and the gear assembly 1521 and the rear axle 143 are located in the cavity. The power output by the second output part 1521b of the gear assembly 1521 is at least partially transmitted to the rear wheel 132 through the rear axle 143. In this implementation, the second output part 1521b is the rear wheel output part.

[0041] Reference Figure 5 In another implementation, the transmission shaft 142 includes a front transmission shaft 1421 and a rear transmission shaft (not shown in the figure). The rear transmission shaft is connected between the rear axle 143 and the second output part 1521b of the gear assembly 1521, and is used to transmit part of the power output by the gear assembly 1521 to the rear axle 143. In this implementation, the second output part 1521b is the rear wheel output part.

[0042] Reference Figure 3 And Figure 4 As an implementation, the engine 151 and the gear assembly 1521 are arranged in parallel. Specifically, along the front-rear direction of the frame 11, the engine 151 is arranged in front of the gear assembly 1521, and the two are arranged close to each other, and the continuously variable transmission 1522 is located on the left side or the right side of the engine 151 and the gear assembly 1521. Moreover, the center line of rotation of the crankshaft (not shown in the figure) of the engine 151 extends substantially along the left-right direction of the frame 11, i.e., the width direction of the frame 11. In this implementation, since the crankshaft of the engine 151 extends along the left-right direction of the frame 11, the engine 151 can occupy a smaller space in the front-rear direction. Moreover, since the engine 151 and the gear assembly 1521 are arranged along the front-rear direction of the frame 11, the gear assembly 1521 can utilize the space vacated by the engine 151 in the front-rear direction, so that the entire power system 15 has a better space occupation in the front-rear direction.

[0043] Reference Figure 6 And Figure 7As an implementation manner, the engine 151 and the transmission shaft 142 are not overlapped in the up-down direction of the vehicle frame 11. It can be understood that by arranging the engine 151 and the transmission shaft 142 not to be overlapped, the transmission shaft 142 is not arranged below the engine 151, so that the space occupation of the entire power system 15 in the height direction of the vehicle frame 11 is reduced, which is beneficial to improve the space utilization of the entire power system 15 in the vehicle frame 11. In combination with the arrangement that the crankshaft of the engine 151 extends in the left-right direction of the vehicle frame 11, the entire power system 15 is not only more compact in the front-rear direction, which is beneficial to control the wheelbase of the ATV 100, but also optimizes the power output path of the power system 15, that is, the power output point of the power system 15 is appropriately offset from the middle of the engine 151 in the left-right direction of the vehicle frame 11, so that the transmission shaft 142 is not located below the engine 151, thereby reducing the space occupation of the power system 15 in the height direction. Finally, the power system 15 can be compactly arranged in the front-rear direction and the up-down direction in the vehicle frame 11 by appropriately occupying the space of the vehicle frame 11 in the left-right direction, which is beneficial to the space arrangement of the vehicle.

[0044] A longitudinal plane 101 perpendicular to the left-right direction of the vehicle frame 11 and passing through the width center of the vehicle frame 11 is defined, and a longitudinal preset straight line 102 parallel to the front-rear direction of the vehicle frame 11 and intersecting the rotation center line of the transmission shaft 142 is defined, and the longitudinal preset straight line 102 can be located in the longitudinal plane 101. In the up-down direction of the vehicle frame 11, the included angle a between the rotation center line of the transmission shaft 142 and the longitudinal preset straight line 102 is an acute angle, and the range of the included angle a is 0° to 15°. As an implementation manner, the range of the included angle a between the rotation center line of the transmission shaft 142 and the longitudinal preset straight line 102 is 0° to 10°. As an implementation manner, the range of the included angle a between the rotation center line of the transmission shaft 142 and the longitudinal preset straight line 102 is 0° to 8°. It can be understood that since the front axle 141 connected to the front end of the transmission shaft 142 is basically located in the middle of the vehicle frame 11 in the left-right direction, the size of the included angle a actually depends on the position of the first output part 1521a of the gear assembly 1521 in the left-right direction of the vehicle frame 11. When the included angle a is too large, it means that the first output part 1521a deviates from the longitudinal preset straight line 102 too far in the left-right direction, which will cause the power system 15 to deviate too much to the left or right in the vehicle frame 11, affecting the weight balance.

[0045] Reference Figure 6As an implementation, in a projection plane perpendicular to the up-down direction of the vehicle frame 11, the transmission shaft 142 is substantially located at the left side of the engine 151, and the transmission shaft 142 is also substantially located at the left side of the longitudinal plane 101, and the engine 151 is substantially located at the right side of the longitudinal plane 101. In this implementation, the transmission shaft 142 is also substantially located at the left side of the longitudinal plane 101, which means that the main body of the transmission shaft 142 is located at the left side of the longitudinal plane 101, and specifically, the middle part of the transmission shaft 142 along the length direction of the transmission shaft 142 is located at the left side of the longitudinal plane 101. In this implementation, the engine 151 is substantially located at the right side of the longitudinal plane 101, which means that the center point of the engine 151 is located at the right side of the longitudinal plane 101, and the center point can be the centroid of the engine 151. In this implementation, the centroid of the engine 151 can be understood as the intersection of three planes, i.e., the vertical plane passing through the midpoint of the engine 151 along the left-right direction, the vertical plane passing through the midpoint of the engine 151 along the front-rear direction, and the horizontal plane passing through the midpoint of the engine 151 along the up-down direction. As an optional implementation (not shown in the figure), the transmission shaft 142 is substantially located at the left side of the engine 151, and the transmission shaft 142 and the engine 151 are both substantially located at the right side of the longitudinal plane 101. Similarly, in this implementation, the transmission shaft 142 and the engine 151 are not completely located at the right side of the longitudinal plane 101, but the centroid and the midpoint of the transmission shaft 142 and the engine 151 are located at the right side of the longitudinal plane 101.

[0046] With reference to Figure 7 As an implementation, in a projection plane perpendicular to the up-down direction of the vehicle frame 11, the transmission shaft 142 is substantially located at the right side of the engine 151. The transmission shaft 142 is also substantially located at the right side of the longitudinal plane 101, and the engine 151 is substantially located at the left side of the longitudinal plane 101. As an optional implementation (not shown in the figure), the transmission shaft 142 is substantially located at the right side of the engine 151, and the transmission shaft 142 and the engine 151 are both substantially located at the left side of the longitudinal plane 101.

[0047] With reference to Figure 6 and Figure 7 The all-terrain vehicle 100 further includes a fuel tank 153 supported by the vehicle frame 11. As an implementation, the engine 151 and the fuel tank 153 are both substantially located at one side of the longitudinal plane 101, and the continuously variable transmission 1522 is substantially located at the other side of the longitudinal plane 101. In this way, the two modules with relatively large masses, i.e., the power system 15 and the fuel tank 153 supported by the vehicle frame 11, can be well balanced in the left-right direction of the vehicle frame 11. Specifically, the centroid of the engine 151 and the centroid of the fuel tank 153 are both located at one side of the longitudinal plane 101, rather than the entirety of the engine 151 and the fuel tank 153. In the attachedFigure 6 For example, the centers of both are located on the right side of the longitudinal plane 101, but the engine 151 and the oil tank 153 still have part of the structure on the left side of the longitudinal plane 101, so that the overall center of gravity of the engine 151 and the oil tank 153 is as close to the longitudinal plane 101 as possible, that is, the center of the frame 11 in the left-right direction, which helps to concentrate gravity and improve the balance of the frame 11 in the left-right direction. As an optional implementation manner, the engine 151 and the oil tank 153 are located on both sides of the longitudinal plane 101, specifically, the centers of the engine 151 and the oil tank 153 are located on the left and right sides of the longitudinal plane 101.

[0048] It is worth noting that the above-mentioned center of mass refers to the center of the three-dimensional shape of the structure. Taking the center of the engine 151 as an example, the center of the engine 151 can be understood as the center of the main part of the engine 151, and the main part of the engine 151 is the entire shell of the engine 151, which is composed of the oil pan, the crankcase, the cylinder block, the cylinder head and the cylinder head cover of the engine 151. Specifically, the center of the main part of the engine 151 can be understood as the intersection of the vertical center plane of the main part in the front-rear direction of the frame 11, the vertical center plane of the main part in the left-right direction of the frame 11, and the horizontal center plane of the main part in the up-down direction of the frame 11. Among them, the center plane of the main part in the front-rear direction of the frame 11 refers to the plane that passes through the middle points of the frontmost end and the rearmost end of the main part and is perpendicular to the front-rear direction. Similarly, the center plane of the main part in the left-right direction of the frame 11 refers to the plane that passes through the middle points of the leftmost end and the rightmost end of the main part and is perpendicular to the left-right direction. The center plane of the main part in the up-down direction of the frame 11 refers to the plane that passes through the middle points of the uppermost end and the lowermost end of the main part and is perpendicular to the up-down direction.

[0049] Reference Figure 8 As an implementation manner, the rear frame 112 is provided with a bottom frame 113, and the bottom frame 113 is substantially horizontally arranged and located below the power system 15. The engine 151 has a center of mass, which is defined as a first center of mass 103. A diagonal preset straight line 104 is also defined, which passes through the first center of mass 103 of the engine 151 and is parallel to the piston movement direction of the engine 151. The engine 151 is arranged obliquely, that is, the diagonal preset straight line 104 is arranged at an acute angle or an obtuse angle with respect to the horizontal plane. Specifically, the engine 151 is arranged in a state of gradually inclining towards or away from the gear assembly 1521 from top to bottom.

[0050] Compared with the engine 151 arranged in a substantially vertical manner, the engine 151 arranged in a tilted manner can reduce the space occupation of the engine 151 in the up-down direction at the cost of occupying a small amount of space in the front-rear direction. Compared with the engine 151 arranged in a substantially horizontal manner, the engine 151 arranged in a tilted manner can reduce the space occupation of the engine 151 in the front-rear direction at the cost of occupying a small amount of space in the up-down direction. Thus, in the present embodiment, by arranging the engine 151 in a tilted manner, the space occupation of the engine 151 in the front-rear direction and the up-down direction can be reduced, so as to improve the space adaptability of the engine 151 in the compact frame of the ATV 100.

[0051] As an implementation manner, the engine 151 is arranged in a gradually far-away direction from the gear assembly 1521 from top to bottom. The rear lower part and the front upper part of the engine 151 are left with a certain space, wherein the rear lower part and the bottom frame 113 jointly define a first accommodating space 105, which can be used to accommodate other components, and the space of the front upper part is a second accommodating space 106, which can also be used to accommodate components. In another implementation manner (see Figure 9 ), the engine 151 is arranged in a gradually close direction to the gear assembly 1521 from top to bottom. The rear upper part and the front lower part of the engine 151 are left with a certain space, wherein the front lower part and the bottom frame 113 jointly define a first accommodating space 105, which can be used to accommodate other components, and the space of the rear upper part is a second accommodating space 106, which can also be used to accommodate components.

[0052] It can be understood that when the space arrangement is reasonable, the first accommodating space 105 or the second accommodating space 106 can be arranged with small-volume components, such as electrical components. It can also be arranged with large-volume components, such as motors, gear assemblies 1521, fuel tanks 153, etc. In an implementation manner, the gear assembly 1521 is at least partially accommodated in the first accommodating space 105 or the second accommodating space 106, which can make the space arrangement of the gear assembly 1521 and the engine 151 more compact. The throttle (not shown), the intake manifold 157, the air filter 156, the turbocharger 154, and the exhaust assembly 155 are arranged in the remaining space of the first accommodating space 105 and the second accommodating space 106, which are parts of components acting on the engine 151. By arranging them in the accommodating space, the space occupation of these components and the overall structure of the engine 151 in the front-rear and up-down directions can be reduced, and the space layout of these components and the overall structure of the engine 151 can be optimized.

[0053] The gear assembly 1521 has a centroid, and the centroid of the gear assembly 1521 is defined as a second centroid 107. The gear assembly 1521 can also cooperate with the first accommodating space 105 or the second accommodating space 106. When the engine 151 is arranged from top to bottom in a direction gradually away from the gear assembly 1521, the second centroid 107 is located obliquely downward behind the first centroid 103 in the front-rear direction of the vehicle frame 11, that is, the gear assembly 1521 is located substantially behind and below the engine 151. Then the front part of the gear assembly 1521 can be at least partially accommodated in the first accommodating space 105, so that the overall structure of the engine 151 and the gear assembly 1521 is more compact, especially in the front-rear direction of the vehicle frame 11, so that the power system 15 occupies less space. In addition, it is worth noting that the distance D1 between the lowest point of the engine 151 and the lowest point of the gear assembly 1521 in the vertical direction ranges from 0 mm to 50 mm, as an implementation manner, the distance D1 ranges from 0 mm to 20 mm, as an implementation manner, the distance D1 ranges from 0 mm to 8 mm, as an implementation manner, the distance D1 is 0 mm. The distance D1 should not be too large, in other words, the smaller the distance D1, the closer the gear assembly 1521 and the bottom of the engine 151 are at the same level, thereby facilitating the installation of the engine 151 and the gear assembly 1521 on the bottom frame 113, and enabling the gear assembly 1521 to be as low as possible, thereby enabling the gear assembly 1521 to be accommodated in the first accommodating space 105.

[0054] As an implementation manner, in a plane perpendicular to the crankshaft axis of the engine 151, the angle β between the line connecting the projection of the crankshaft axis and the projection of the output shaft axis of the second output portion 1521b and any horizontal plane ranges from 6° to 11°, and further, the angle β ranges from 8° to 10°. In this way, the relative position relationship between the gear assembly 1521 and the engine 151 is defined to some extent, so that the difference in output height between the above two is small, and the space occupied by the above two in the height direction can be controlled to be not too large.

[0055] Reference Figure 9When the engine 151 is arranged in a gradually closer direction to the gear assembly 1521 from top to bottom, that is, the engine 151 is arranged in a gradually closer direction to the rear from top to bottom. The second centroid 107 is located in the obliquely rearward upper side of the first centroid 103 in the front-rear direction of the vehicle frame 11, that is, the gear assembly 1521 is located substantially in the rear and upper side of the engine 151. The front part of the gear assembly 1521 can be at least partially accommodated in the second accommodation space 106, so that the overall structure of the engine 151 and the gear assembly 1521 is more compact, especially in the front-rear direction of the vehicle frame 11, so that the power system 15 occupies less space. In addition, it is worth noting that the distance D2 between the highest point of the engine 151 and the highest point of the gear assembly 1521 in the vertical direction is in the range of 0mm to 70mm, as an implementation manner, the distance D2 is in the range of 0mm to 50mm, as an implementation manner, the distance D2 is in the range of 0mm to 4mm, as an implementation manner, the distance D2 is 0mm. The distance D2 should not be too large, in other words, the smaller the distance D2, the closer the top of the gear assembly 1521 and the engine 151 are at the same level, so that the gear assembly 1521 can be as high as possible, but without increasing the space occupied by the entire power system 15 in the vertical direction, so that the gear assembly 1521 can be accommodated in the second accommodation space 106.

[0056] Reference Figure 8 And Figure 9 It is worth noting that the first output part 1521a and the second output part 1521b on the gear assembly 1521 (refer to Figure 3 to Figure 5 ) are part of the gear assembly 1521. In one of the implementation manners, the first output part 1521a can be at least partially accommodated in the first accommodation space 105.

[0057] It is worth noting that under the premise that the engine 151 is arranged in front of the gear assembly 1521, by tilting the engine 151 and forming a space behind it for the gear assembly 1521 to be partially accommodated, not only can the space occupied by the engine 151 in the vertical direction and the front-rear direction be reduced, but also the space formed by tilting the engine 151 can be used for the accommodation of the gear assembly 1521, so as to form a compact power system 15 structure and reduce the space occupied by the power system 15 in the front-rear direction.

[0058] Reference Figure 10As an implementation, the power system 15 is further provided with a turbocharger 154, an exhaust assembly 155, an air cleaner 156, and an intake manifold 157. The turbocharger 154 is connected between the engine 151 and the exhaust assembly 155, and boosts the air before entering the cylinders of the engine 151 by the heat and mechanical energy of the exhaust gas discharged from the engine 151. The air cleaner 156 is used to clean the air entering the engine 151. The intake manifold 157 is used to distribute the air-fuel mixture to each cylinder of the engine 151.

[0059] With reference to Figure 8 to Figure 10 The turbocharger 154 is fixed to the rear side of the engine 151, and the exhaust assembly 155 is located above the rear side of the gear assembly 1521. In the front-rear direction of the frame 11, the turbocharger 154 is located between the engine 151 and the exhaust assembly 155. Therefore, a certain distance can be reserved between the engine 151 and the exhaust assembly 155, reducing the adverse effects of the heat of the exhaust assembly 155 on the engine 151. In a plane perpendicular to the up-down direction of the frame, a part of the projection of the gear assembly overlaps the projection of the engine, and another part of the projection of the gear assembly at least partially overlaps the projection of the turbocharger and / or the exhaust assembly. In an implementation, in the up-down direction of the frame 11, the front part of the gear assembly 1521 at least partially overlaps the engine 151, the rear part of the gear assembly 1521 at least partially overlaps the turbocharger 154, and the rear part of the gear assembly 1521 at least partially overlaps the front part of the exhaust assembly 155, that is, the front part of the exhaust assembly 155 is located above the gear assembly 1521 and behind the engine 151. The front part of the exhaust assembly 155 and the turbocharger 154 make use of the space behind the engine 151 and above the gear assembly 1521, and the exhaust assembly 155 and the turbocharger 154 make full use of the space, so that the exhaust assembly 155 and the turbocharger 154 can be arranged compactly with the gear assembly 1521 and the engine 151.

[0060] The main body of the air cleaner 156 is located in front of the engine 151 and close to the left side, and the intake manifold 157 is located on the front side of the engine 151. When the engine 151 is arranged from top to bottom in a direction gradually away from the gear assembly 1521, the intake manifold 157 is located in the second accommodating space 106.

[0061] With reference to Figure 11The space in the frame 11 of the all-terrain vehicle 100 for arranging the components is limited. In the present application, the engine 151 and the gear assembly 1521 are arranged in front and back, the engine 151 is arranged obliquely, the gear assembly 1521 and the air intake manifold 157 and other components are reasonably accommodated in the first accommodating space 105 or the second accommodating space 106, the exhaust assembly 155 is arranged compactly with the gear assembly 1521 and the engine 151, and the like. Each main component can be arranged compactly and reasonably in the rear frame 112. In particular, the two parallel modules of the engine 151 and the gear assembly 1521 can be arranged compactly, and the components such as the air intake manifold 157 and the turbocharger 154 that act on the engine 151 can be arranged close to the engine 151 to form a power module with a more reasonable space arrangement. Ultimately, the entire power system 15 is distributed centrally, which facilitates the design size of the rear frame 112 and provides more design possibilities.

[0062] Reference Figure 12 and Figure 13 The continuously variable transmission 1522 is located substantially on the left side of the engine 151, and is used to transmit power of the engine 151 to the gear assembly 1521 through the continuously variable transmission 1522. The continuously variable transmission 1522 is provided with an input gear 1522a, a driving wheel 1522b and a driven wheel 1522c. The input gear 1522a is located on the left side of the engine 151, and a input shaft 1522d is coaxially fixed on the input gear 1522a. The input shaft 1522d is connected to the crankshaft of the engine 151 through a spline, so as to realize power transmission. The driving wheel 1522b is fixed with a driving gear 1522e on one side, and the driving gear 1522e is engaged with the input gear 1522a, so as to transmit the power of the input gear 1522a to the driving wheel 1522b. In the front and back direction of the frame 11, the driving wheel 1522b is located in front of the driven wheel 1522c, and a transmission member 1522f is sleeved between the driving wheel 1522b and the driven wheel 1522c. The transmission member 1522f is connected in head-to-tail manner, and specifically is a steel belt. The steel belt has the advantages of light weight, small size and simple structure, and is convenient for adapting to the compact power system 15 in the present application. In an alternative implementation manner, the transmission member 1522f is a steel chain, which has better transmission efficiency and carrying capacity. The driving wheel 1522b transmits power to the driven wheel 1522c through the transmission member 1522f. The driven wheel 1522c is located on the left side of the gear assembly 1521, and a driven output shaft 1522g is fixed coaxially on the driven wheel 1522c. The driven output shaft 1522g is in transmission connection with the input end of the gear assembly 1521.

[0063] As an implementation, the engine 151, the continuously variable transmission 1522 and the gear assembly 1521 each has an independent housing structure, and the housing structures of the engine 151, the continuously variable transmission 1522 and the gear assembly 1521 are fixedly connected, which can be that the housing of the engine 151, the housing of the continuously variable transmission 1522 and the housing of the gear assembly 1521 are sequentially fixed, or any two of the housing of the engine 151, the housing of the continuously variable transmission 1522 and the housing of the gear assembly 1521 are fixed. As another implementation, the housing of the continuously variable transmission 1522 and the gear assembly 1521 are integrally formed, and are fixedly connected with the housing of the engine 151.

[0064] Referring to Figure 14 As an implementation, the engine 151 and the gear assembly 1521 are arranged side by side, and the engine 151 is arranged at the rear of the gear assembly 1521 along the front-rear direction of the vehicle frame 11, and the continuously variable transmission 1522 is arranged at the left side or the right side of the engine 151 and the gear assembly 1521. The rotation center line of the crankshaft (not shown in the figure) of the engine 151 extends substantially along the left-right direction of the vehicle frame 11, i.e. the width direction of the vehicle frame 11.

[0065] Referring to Figure 15 and Figure 16 As an implementation, the engine 151 and the drive shaft 142 do not overlap each other along the up-down direction of the vehicle frame 11. The angle α between the rotation center line of the drive shaft 142 and the longitudinal preset straight line 102 along the up-down direction of the vehicle frame 11 is an acute angle, and the angle α ranges from 0° to 15°. As an implementation, the angle α between the rotation center line of the drive shaft 142 and the longitudinal preset straight line 102 ranges from 0° to 10°. As an implementation, the angle α between the rotation center line of the drive shaft 142 and the longitudinal preset straight line 102 ranges from 0° to 8°. It can be understood that, since the front axle 141 connected to the front end of the drive shaft 142 is substantially located at the middle of the vehicle frame 11 along the left-right direction thereof, the size of the angle α actually depends on the position of the first output part 1521a of the gear assembly 1521 along the left-right direction on the vehicle frame 11. When the angle α is too large, it means that the first output part 1521a deviates from the longitudinal preset straight line 102 too far along the left-right direction, which will cause the power system 15 to be too left or too right on the vehicle frame 11, affecting the weight balance.

[0066] Referring to Figure 15 As an implementation, the drive shaft 142 is substantially located at the left side of the engine 151 along the up-down direction of the vehicle frame 11, the drive shaft 142 is substantially located at the left side of the longitudinal plane 101, and the engine 151 is substantially located at the right side of the longitudinal plane 101. In another implementation (not shown in the figure), the drive shaft 142 is substantially located at the left side of the engine 151, and the drive shaft 142 and the engine 151 are both substantially located at the right side of the longitudinal plane 101.

[0067] With reference to Figure 16 , as an implementation, the transmission shaft 142 is substantially located at the right side of the engine 151 in the up-down direction of the vehicle frame 11. The transmission shaft 142 is substantially located at the right side of the longitudinal plane 101, and the engine 151 is substantially located at the left side of the longitudinal plane 101. In another implementation (not shown in the figure), the transmission shaft 142 is substantially located at the right side of the engine 151, and the transmission shaft 142 and the engine 151 are both substantially located at the left side of the longitudinal plane 101.

[0068] With reference to Figure 15 and Figure 16 , as an implementation, the engine 151 and the oil tank 153 are both substantially located at the right side or the left side of the longitudinal plane 101. In another implementation, the longitudinal plane 101 is substantially located between the engine 151 and the oil tank 153.

[0069] With reference to Figure 17 and Figure 18 , as an implementation, the engine 151 is arranged in a gradually inclined manner from top to bottom, away from the gear assembly 1521. The front lower side and the rear upper side of the engine 151 are left with a certain space, wherein the space between the front lower side and the bottom frame 113 is the first accommodating space 105, which can be used to accommodate other components, and the space of the rear upper side is the second accommodating space 106, which can also be used to accommodate components. In another implementation (see Figure 18 ), the engine 151 is arranged in a gradually inclined manner from top to bottom, close to the gear assembly 1521. The front upper side and the rear lower side of the engine 151 are left with a certain space, wherein the space between the rear lower side and the bottom frame 113 is the first accommodating space 105, which can be used to accommodate other components, and the space of the front upper side is the second accommodating space 106, which can also be used to accommodate components.

[0070] It can be understood that when the space is reasonably arranged, the first accommodating space 105 or the second accommodating space 106 can be arranged with small volume components, such as electrical components. It can also be arranged with large volume components, such as motors, gear assemblies 1521, oil tanks 153, etc.

[0071] The gear assembly 1521 can be matched with the first accommodating space 105 or the second accommodating space 106. When the engine 151 is arranged from top to bottom in a direction gradually away from the gear assembly 1521, the second centroid 107 of the gear assembly 1521 is located obliquely below the first centroid 103 of the engine 151, that is, the gear assembly 1521 is basically located in front of and below the engine 151. Then the rear part of the gear assembly 1521 can be at least partially accommodated into the first accommodating space 105, so that the overall structure of the engine 151 and the gear assembly 1521 is more compact, especially in the front-rear direction of the vehicle frame 11, so that the power system 15 occupies less space. In addition, it is worth noting that the distance D1 between the lowest point of the engine 151 and the lowest point of the gear assembly 1521 in the vertical direction ranges from 0 mm to 50 mm, as an implementation manner, the distance D1 ranges from 0 mm to 20 mm, as an implementation manner, the distance D1 ranges from 0 mm to 2 mm, and as an implementation manner, the distance D1 is 0 mm. The distance D1 should not be too large, in other words, the smaller the distance D1, the closer the bottom of the gear assembly 1521 and the engine 151 are at the same level, so that the engine 151 and the gear assembly 1521 can be conveniently installed on the bottom frame 113, and the position of the gear assembly 1521 can be as low as possible, so that the gear assembly 1521 can be accommodated into the first accommodating space 105 more.

[0072] Reference Figure 18 When the engine 151 is arranged from top to bottom in a direction gradually close to the gear assembly 1521, that is, the engine 151 is arranged from top to bottom in a direction gradually close to the front. The second centroid 107 is located obliquely above the first centroid 103, that is, the gear assembly 1521 is basically located in front of and above the engine 151. Then the rear part of the gear assembly 1521 can be at least partially accommodated into the second accommodating space 106, so that the overall structure of the engine 151 and the gear assembly 1521 is more compact, especially in the front-rear direction of the vehicle frame 11, so that the power system 15 occupies less space. In addition, it is worth noting that the distance D2 between the highest point of the engine 151 and the highest point of the gear assembly 1521 in the vertical direction ranges from 0 mm to 70 mm, as an implementation manner, the distance D2 ranges from 0 mm to 50 mm, as an implementation manner, the distance D2 ranges from 0 mm to 4 mm, and as an implementation manner, the distance D2 is 0 mm. The distance D2 should not be too large, in other words, the smaller the distance D2, the closer the top of the gear assembly 1521 and the engine 151 are at the same level, so that the position of the gear assembly 1521 can be as high as possible, but without increasing the space occupied by the entire power system 15 in the up-down direction, so that the gear assembly 1521 can be accommodated into the second accommodating space 106 more.

[0073] ReferenceFigure 17 and Figure 18 It is worth mentioning that the first output 1521a and the second output 1521b (not shown in the figure) on the gear assembly 1521 are both part of the gear assembly 1521. In one implementation, the first output 1521a can be at least partially accommodated in the first accommodation space 105.

[0074] It is worth mentioning that, on the premise that the engine 151 is arranged behind the gear assembly 1521, by tilting the engine 151 and forming a space in front of the engine 151 for accommodating part of the gear assembly 1521, not only the space occupation of the engine 151 in the up-down direction and the front-back direction can be reduced, but also the rear space formed by tilting the engine 151 can be used for accommodating the gear assembly 1521, so as to form a compact power system 15 structure and reduce the space occupation of the power system 15 in the front-back direction.

[0075] Referring to Figure 19 As an implementation, for the orientation and position of the components around the power system 15, specifically, the turbocharger 154 is fixed to the front side of the engine 151, and the exhaust assembly 155 is located above and in front of the gear assembly 1521. Along the front-back direction of the vehicle frame 11, the turbocharger 154 is located between the engine 151 and the exhaust assembly 155, so that a certain distance can be reserved between the engine 151 and the exhaust assembly 155, reducing the adverse effects of the heat of the exhaust assembly 155 on the engine 151. Along the up-down direction of the vehicle frame 11, the exhaust assembly 155 partially overlaps the gear assembly 1521, so that the exhaust assembly 155 can be arranged compactly with the gear assembly 1521 and the engine 151. The main body of the air filter 156 is located behind and close to the right side of the engine 151, and the intake manifold 157 is located at the rear side of the engine 151. As an implementation, an exhaust pipe is added to the exhaust port of the exhaust assembly 155 to guide the exhaust gas to the rear of the vehicle.

[0076] Referring to Figure 17 and Figure 19 As an implementation, when the engine 151 is arranged to gradually tilt from top to bottom towards the rear side of the vehicle frame 11, the second accommodation space 106 is located above and behind the engine 151, and the intake manifold 157 and the exhaust assembly 155 are at least partially located in the second accommodation space 106.

[0077] Referring to Figure 18 and Figure 19 When the engine 151 is arranged to gradually tilt from top to bottom towards the front side of the vehicle frame 11, the first accommodation space 105 is located below and behind the engine 151, and the intake manifold 157 and the exhaust assembly 155 are at least partially located in the first accommodation space 105.

[0078] It should be understood that all the modifications and variations can be made according to the above description by those skilled in the art, and all these modifications and variations shall belong to the protection scope of the claims attached to the present application.

Claims

1. An all-terrain vehicle, comprising: a frame, the frame comprising a bottom frame; a walking system, the walking system being at least partially located below the bottom frame; a transmission system, the transmission system comprising a transmission shaft extending substantially along a front-rear direction of the frame, the transmission shaft being drivingly connected to the walking system; a power system, the power system being supported by the frame; the power system comprising a transmission mechanism and an engine, the transmission mechanism comprising a gear assembly and a continuously variable transmission; the gear assembly being drivingly connected to the transmission shaft; the engine being located above the bottom frame and comprising a crankshaft; the continuously variable transmission comprising a driving wheel, a driven wheel and a transmission member, the transmission member being wrapped around peripheries of the driving wheel and the driven wheel, the crankshaft of the engine being drivingly connected to the driving wheel, the transmission member being driven to rotate the driven wheel under the drive of the driving wheel, the driven wheel being drivingly connected to the gear assembly; characterized in that a center line of rotation of the crankshaft extends along a left-right direction of the frame, and along an up-down direction of the frame, the engine and the transmission shaft do not overlap each other; the transmission member is a steel chain or a steel belt.

2. The all-terrain vehicle of claim 1, characterized by: The engine and the transmission shaft are arranged apart along the left-right direction of the frame; a plane perpendicular to the left-right direction of the frame and passing through a center of width of the frame is defined as a longitudinal plane, along the left-right direction of the frame, the engine and the transmission shaft are located on two sides of the longitudinal plane respectively.

3. The ATV of claim 1, wherein: The transmission member is a steel belt.

4. The all-terrain vehicle of claim 1, characterized by: The all-terrain vehicle further comprises a fuel tank supported by the frame; a plane perpendicular to the left-right direction of the frame and passing through the center of width of the frame is defined as a longitudinal plane; along the left-right direction of the frame, the engine and the fuel tank are substantially located on one side of the longitudinal plane, and the transmission mechanism is substantially located on the other side of the longitudinal plane.

5. The all-terrain vehicle of claim 1, characterized by: The engine is arranged in a state of gradually tilting towards the direction of approaching or moving away from the transmission mechanism from top to bottom, so that the engine and at least the bottom frame jointly define a first accommodation space, and at least part of the gear assembly is located in the first accommodation space.

6. The all-terrain vehicle of claim 5, characterized by: Along the up-down direction of the frame, a spacing between a lowest point of the engine and a lowest point of the gear assembly along the up-down direction of the frame ranges from 0 mm to 50 mm.

7. The all-terrain vehicle of claim 5, characterized by: The all-terrain vehicle comprises a turbocharger and an exhaust assembly, the turbocharger being connected between the engine and the exhaust assembly, the turbocharger and the exhaust assembly being located above the gear assembly along the up-down direction of the frame; in a plane perpendicular to the up-down direction of the frame, a part of a projection of the gear assembly coincides with a projection of the engine, and another part of the projection of the gear assembly at least partially coincides with a projection of the turbocharger and / or the exhaust assembly.

8. The ATV of claim 5, and wherein: A second accommodation space is defined above the engine in the front-rear direction of the vehicle frame; the second accommodation space and the first accommodation space are respectively located on the front and rear sides of the engine in the front-rear direction of the vehicle frame; the all-terrain vehicle comprises an air intake manifold, which is located in the second accommodation space.

9. The all-terrain vehicle of claim 1, characterized by: The engine and the gear assembly are arranged in the front-rear direction of the vehicle frame, with the engine in front or the gear assembly in front; in the left-right direction of the vehicle frame, one part of the continuously variable transmission is located on one side of the engine, and another part of the continuously variable transmission is located on one side of the gear assembly; the gear assembly is provided with a rear wheel output portion, which is in driving connection with the rear wheels of the running system, and the output shaft axis of the rear wheel output portion is substantially parallel to the left-right direction of the vehicle frame.

10. The all-terrain vehicle of claim 9, characterized by: In a plane perpendicular to the crankshaft axis, the included angle between the connecting line of the projection of the crankshaft axis and the projection of the output shaft axis of the rear wheel output portion and any horizontal plane ranges from 6° to 11°.

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