An all-terrain vehicle

Abstract

The present application provides an all-terrain vehicle, comprising an engine; a traveling assembly; and a drive axle, wherein the engine drives the traveling assembly to rotate via the drive axle, the drive axle comprising a front axle, a middle axle, and a rear axle, the middle axle being located between the front axle and the rear axle; the engine and the middle axle are connected via a first shaft, the middle axle and the rear axle are connected via a second shaft, and the front axle and the engine are connected via a third shaft, the first shaft, the second shaft, and the third shaft extending substantially along a straight line, the direction of rotation of the first shaft being the same as the direction of rotation of the second shaft. This all-terrain vehicle can reduce the risk of resonance and shaking of the first, second, and third shafts during transmission, thereby improving the driving stability of the all-terrain vehicle on the ground; and the direction of rotation of the first shaft being the same as the direction of rotation of the second shaft, thereby reducing the structural complexity of the rear axle and contributing to cost reduction.

Description

Technical Field

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

[0002] An all-terrain vehicle (ATV) is a vehicle that can travel on any terrain, easily maneuvering over terrain difficult for ordinary vehicles. It can navigate beaches, riverbeds, forest trails, streams, and even harsh desert terrain. To ensure proper operation in challenging environments like hillsides, mudflats, and muddy fields, ATVs are typically configured with six-wheel drive or eight-wheel drive. ATVs with six or more drive axles have three or more drive axles. The middle drive axle, located between the front and rear drive axles, transmits power not only to the corresponding running components but also to the next drive axle.

[0003] In the prior art, for all-terrain vehicles with six or more wheels, the input shaft and output shaft of the center drive axle rotate in different directions, resulting in a complex structure of the rear drive axle, which increases the difficulty in designing the all-terrain vehicle. Summary of the Invention

[0004] The present invention provides an all-terrain vehicle, which can reduce the structural complexity of a rear axle and is conducive to reducing the design difficulty of an all-terrain vehicle with six or more wheels.

[0005] The present invention provides an all-terrain vehicle, comprising:

[0006] Frame;

[0007] a body panel at least partially disposed on the vehicle frame;

[0008] an engine, at least partially disposed on the frame;

[0009] Walking components;

[0010] Drive axle, the engine drives the walking assembly to rotate through the drive axle, the drive axle includes a front axle, a middle axle and a rear axle, the middle axle is located between the front axle and the rear axle; the engine and the middle axle are connected by a first shaft, the middle axle and the rear axle are connected by a second shaft, and the front axle and the engine are connected by a third shaft. The first shaft, the second shaft and the third shaft extend basically along a straight line, and the rotation direction of the first shaft is the same as the rotation direction of the second shaft.

[0011] In one possible design, the all-terrain vehicle is provided with a transmission structure, which is mounted on the middle bridge. The transmission structure includes a first gear, a second gear, a third gear, a fourth gear and a fourth shaft. The first gear is meshed with the second gear, the third gear is meshed with the fourth gear, and the second gear and the third gear are respectively mounted at opposite ends of the fourth shaft.

[0012] When the drive axle includes a center axle, the first gear is connected to the first shaft, and the fourth gear is connected to the second shaft;

[0013] When the drive axle includes multiple middle bridges, adjacent middle bridges are connected by the fifth shaft, the first shaft is connected to the adjacent first gear, one end of the fifth shaft is connected to the adjacent fourth gear, the other end is connected to the adjacent first gear, and the second shaft is connected to the adjacent fourth gear.

[0014] In a possible design, the pitch circle diameter of the first gear is D1, the pitch circle diameter of the second gear is D2, the pitch circle diameter of the third gear is D3, and the pitch circle diameter of the fourth gear is D4, D1 = D2, D3 = D4.

[0015] In one possible design, the middle bridge includes a sixth shaft, a seventh shaft, and a fifth gear and a sixth gear that mesh with each other. The fifth gear and the sixth gear are both bevel gears. The pitch circle diameter of the fifth gear is D5, and the pitch circle diameter of the sixth gear is D6, where D5 is less than D6. The fifth gear and the first gear are both mounted on the sixth shaft, and the fourth gear is mounted on the seventh shaft.

[0016] When the drive axle includes a center axle, the sixth shaft is connected to the first shaft, and the seventh shaft is connected to the second shaft;

[0017] When the drive axle includes multiple intermediate axles, the first shaft is connected to the adjacent sixth shaft, one end of the fifth shaft is connected to the adjacent seventh shaft and the other end is connected to the adjacent sixth shaft, and the second shaft is connected to the adjacent seventh shaft.

[0018] In a possible design, the middle bridge further includes a differential, which is connected to the sixth gear.

[0019] In a possible design, the middle bridge further includes a first housing, the first housing is provided with a first accommodating cavity, and the transmission structure, the differential, the fifth gear and the sixth gear are all located in the first accommodating cavity.

[0020] In a possible design, part of the fourth shaft is a hollow structure.

[0021] In one possible design, the second gear is provided with a first internal spline, the third gear is provided with a second internal spline, and the opposite ends of the fourth shaft are respectively provided with a first external spline and a second external spline, the first internal spline cooperates with the first external spline to connect the second gear to one end of the fourth shaft, and the second internal spline cooperates with the second external spline to connect the third gear to the other end of the fourth shaft.

[0022] In a possible design, the first gear, the second gear, the third gear and the fourth gear are all helical gears.

[0023] In one possible design, the middle bridge is provided with a transmission structure, which is installed on the middle bridge. The transmission structure includes a seventh gear, a ninth gear and an eighth shaft. The middle bridge includes an eighth gear and a tenth gear. The eighth shaft and the first shaft extend substantially in a straight line. The seventh gear, the eighth gear, the ninth gear and the tenth gear are all bevel gears. The seventh gear meshes with the eighth gear, and the ninth gear meshes with the tenth gear. The seventh gear and the ninth gear are respectively installed at opposite ends of the eighth shaft.

[0024] When the drive axle includes a center axle, one end of the eighth shaft is connected to the first shaft and the other end is connected to the second shaft;

[0025] When the drive axle includes multiple intermediate axles, adjacent intermediate axles are connected via the fifth shaft, one end of the eighth shaft is connected to the first shaft or the fifth shaft, and the other end is connected to the second shaft or the fifth shaft.

[0026] The beneficial effects of the present invention are:

[0027] The all-terrain vehicle provided by the present invention has an engine and a middle bridge connected by a first shaft, a middle bridge and a rear bridge connected by a second shaft, and a front bridge and an engine connected by a third shaft. The first shaft, the second shaft and the third shaft basically extend along a straight line, thereby reducing the risk of resonance and shaking of the first shaft, the second shaft and the third shaft during transmission, so that the first shaft, the second shaft and the third shaft can smoothly transmit the torque of the engine, thereby improving the driving stability of the all-terrain vehicle on the ground; and the rotation direction of the first shaft is the same as the rotation direction of the second shaft, thereby eliminating the need to set a reversing component on the rear bridge or the next middle bridge, reducing the structural complexity of the rear bridge or the next middle bridge, and helping to reduce costs.

[0028] It should be understood that the foregoing general description and the following detailed description are merely illustrative and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic structural diagram of an all-terrain vehicle provided in this application in a specific embodiment;

[0030] Figure 2 This is a schematic structural diagram of a partial structure of the all-terrain vehicle provided by the present application in a first embodiment, wherein the drive axle includes a middle axle;

[0031] Figure 3 for Figure 2 Schematic diagram of the structure of the first and second axes;

[0032] Figure 4 This is a schematic structural diagram of a partial structure of the all-terrain vehicle provided by the present application in a first embodiment, wherein the drive axle includes two middle axles;

[0033] Figure 5for Figure 4 The enlarged view of point I in the middle;

[0034] Figure 6 This is a schematic structural diagram of a portion of the structure of the middle bridge provided in this application in a first embodiment;

[0035] Figure 7 for Figure 6 A schematic diagram of the structure of the middle bridge after removing the first shell;

[0036] Figure 8 for Figure 6 sectional view of

[0037] Figure 9 for Figure 6 Exploded diagram;

[0038] Figure 10 It is a schematic structural diagram of the sixth shaft, the fifth gear, the sixth gear and the differential in the first embodiment;

[0039] Figure 11 for Figure 9 Enlarged view of position II in the middle;

[0040] Figure 12 This is a schematic structural diagram of a partial structure of the all-terrain vehicle provided by the present application in a second embodiment, wherein the drive axle includes a middle axle.

[0041] Reference numerals:

[0042] 100-all-terrain vehicles;

[0043] 10-Engine;

[0044] 20-walking component;

[0045] 30-drive axle;

[0046] 31-front axle;

[0047] 32-Middle Bridge;

[0048] 321-sixth axis;

[0049] 322-seventh axis;

[0050] 323-fifth gear;

[0051] 324-sixth gear;

[0052] 324a-Ontology;

[0053] 324b-gear teeth;

[0054] 325-differential;

[0055] 326-first shell;

[0056] 326a-left end cover;

[0057] 326b-right end cover;

[0058] 326c- rear end cover;

[0059] 327-eighth gear;

[0060] 328-10th gear;

[0061] 329-bearing;

[0062] 3210-first coupling;

[0063] 3211-second coupling;

[0064] 3212-First Middle Bridge;

[0065] 3213-Second Middle Bridge;

[0066] 33-rear axle;

[0067] 40-first axis;

[0068] 50-second axis;

[0069] 60-third axis;

[0070] 70-fifth axis;

[0071] 80-transmission structure;

[0072] 81-first gear;

[0073] 82-second gear;

[0074] 821-first internal spline;

[0075] 83-third gear;

[0076] 84-fourth gear;

[0077] 85-fourth axis;

[0078] 851-first external spline;

[0079] 86-seventh gear;

[0080] 87-9th gear;

[0081] 88-eighth axis;

[0082] 90-Second shell.

[0083] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application. DETAILED DESCRIPTION

[0084] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0085] It should be clear that the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0086] The terms used in the embodiments of the present application are for the purpose of describing specific embodiments only and are not intended to limit the present application. The singular forms "a", "an", "the" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise.

[0087] It should be understood that the term "and / or" as used herein is merely a description of the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0088] It should be noted that the directional words such as "upper", "lower", "left", and "right" described in the embodiments of the present application are described based on the angles shown in the accompanying drawings and should not be understood as limiting the embodiments of the present application. In addition, in the context, it should be understood that when it is mentioned that an element is connected to another element "on" or "under", it can not only be directly connected to the other element "on" or "under", but also be indirectly connected to the other element "on" or "under" through an intermediate element.

[0089] like Figure 1As shown, an embodiment of the present application provides an all-terrain vehicle 100 that can maneuver easily over terrain difficult for ordinary vehicles. It can travel on beaches, riverbeds, forest paths, streams, and even harsh desert terrain. This all-terrain vehicle 100 includes an engine 10, a traveling assembly 20, a frame, body panels, a transmission system, a travel and control system, and electrical equipment. The engine 10 is the power source of the all-terrain vehicle 100. The transmission system transmits the power output of the engine 10 to the traveling assembly 20 and includes components such as connecting shafts and a drive axle 30. The travel and control system connects the various assemblies and components of the all-terrain vehicle 100 into a single unit, supports the entire vehicle, and ensures normal operation. It includes components such as brakes, steering, suspension, and the traveling assembly 20. The body panels create a passenger compartment and also serve as a storage space for luggage. The electrical equipment includes a power supply, an engine ignition system, and a starting system. The traveling assembly can specifically be a moving structure such as wheels or tracks.

[0090] The driving axle 30 is used to increase the torque transmitted from the engine 10 or the connecting shaft and transmit the power to the traveling assembly 20 , that is, the engine 10 drives the traveling assembly 20 to rotate through the driving axle 30 .

[0091] like Figure 2 As shown, in the embodiment of the present application, the drive axle 30 of the all-terrain vehicle 100 includes a front axle 31, a middle axle 32, and a rear axle 33, which are spaced apart along the length direction of the all-terrain vehicle 100. That is, the all-terrain vehicle 100 in the embodiment of the present application is a six-wheel drive vehicle or a vehicle with six or more wheels, so as to meet higher driving force requirements and enable the all-terrain vehicle 100 to normally travel in outdoor environments such as hillsides, mudflats, and muddy fields. Among them, the front axle 31 is used to connect to the front wheels, the rear axle 33 is used to connect to the rear wheels, and the middle axle 32 is located between the front axle 31 and the rear axle 33. The middle axle 32 is used to connect to the wheels located between the front and rear wheels. For example, in an eight-wheel drive all-terrain vehicle, the front axle 31 is connected to the first row of wheels, one of the middle axles 32 is connected to the second row of wheels, the other middle axle 32 is connected to the third row of wheels, and the rear axle 33 is connected to the fourth row of wheels.

[0092] like Figure 2-4 As shown, in the all-terrain vehicle 100 provided in the embodiment of the present application, the engine 10 and the middle bridge 32 are connected by a first shaft 40, the middle bridge 32 and the rear bridge 33 are connected by a second shaft 50, and the front bridge 31 and the engine 10 are connected by a third shaft 60. The first shaft 40, the second shaft 50 and the third shaft 60 extend basically along a straight line, and the rotation direction of the first shaft 40 is the same as the rotation direction of the second shaft 50.

[0093] Due to the fact that there may be errors in the actual production and installation process, it is difficult to ensure that the axes of the first shaft 40, the second shaft 50 and the third shaft 60 are completely aligned after the components of the all-terrain vehicle 100 are installed. For example, the first shaft 40 and the second shaft 50 are used as an example to illustrate the allowable error range. After the installation is completed, if Figure 3 As shown, when the axis of the first axis 40 and the axis of the second axis 50 are allowed to have an included angle α, the allowable error range of the included angle α is 0° to 5°; when the axis of the first axis 40 and the axis of the second axis 50 are allowed to have a preset distance L, the allowable error range of the preset distance L is 0 to 3 mm. Similarly, the allowable error ranges for the first axis 40 and the third axis 60, and the allowable error ranges for the second axis 50 and the third axis 60 are the same as those described above for the first axis 40 and the second axis 50. That is, within these allowable error ranges, the first axis 40, the second axis 50, and the third axis 60 can extend substantially along a straight line.

[0094] When the engine 10 is working, the engine 10 drives the third shaft 60 to rotate, and the third shaft 60 transmits the driving force to the front axle 31, and the front axle 31 continues to transmit the driving force to the front wheels to rotate the front wheels; the engine 10 drives the first shaft 40 to rotate, and the first shaft 40 transmits the driving force to the middle bridge 32, and the middle bridge 32 continues to transmit the driving force to the middle wheels to rotate the middle wheels; and because the middle bridge 32 and the rear axle 33 are connected through the second shaft 50, the driving force transmitted to the middle bridge 32 by the engine 10 is continued to be transmitted to the rear axle 33, and the rear axle 33 continues to transmit the driving force to the rear wheels to rotate. At this time, the all-terrain vehicle 100 can travel on the ground.

[0095] In this embodiment, the first shaft 40, the second shaft 50 and the third shaft 60 extend basically along a straight line, reducing the risk of resonance and shaking of the first shaft 40, the second shaft 50 and the third shaft 60 during the transmission process, so that the first shaft 40, the second shaft 50 and the third shaft 60 can smoothly transmit the torque of the engine 10, thereby improving the driving stability of the all-terrain vehicle 100 on the ground; and the rotation direction of the first shaft 40 is the same as the rotation direction of the second shaft 50, so that the rear axle 33 or the next middle bridge 32 does not need to be provided with a reversing component, reducing the structural complexity of the rear axle 33 or the next middle bridge 32, which is conducive to reducing costs.

[0096] In one embodiment, the all-terrain vehicle 100 is provided with a transmission structure 80, which is installed between the first shaft 40 and the second shaft 50 and distributed around the center bridge 32. As an implementation, the transmission structure 80 can be installed on the center bridge 32. The transmission structure 80 includes a transmission shaft and transmission gears mounted at opposite ends of the transmission shaft. The transmission shaft and the first shaft 40 extend in the same direction. Under the power of the engine 10, the first shaft 40 can drive the transmission gear at one end of the transmission shaft to rotate, thereby causing the transmission gear at the other end of the transmission shaft to drive the second shaft 50 to rotate.

[0097] In this embodiment, the driving force of the engine 10 can be transmitted to the transmission structure 80 located on the middle bridge 32 through the first shaft 40. The transmission structure 80 continues to transmit the driving force to the second shaft 50, and then transmits the driving force to the rear axle 33 through the second shaft 50. Since the transmission structure 80 includes a transmission shaft and transmission gears installed at opposite ends of the transmission shaft, when the first shaft 40 drives the transmission gear at one end of the transmission shaft to rotate, the transmission gear at the other end of the transmission shaft can drive the second shaft 50 to rotate, so that the first shaft 40 and the second shaft 50 can rotate in the same direction.

[0098] According to the first embodiment of the present application, Figure 2 、 Figure 4-5 As shown, the transmission structure 80 is installed on the middle bridge 32, the transmission shaft is the fourth shaft 85, and the transmission gears are the second gear 82 and the third gear 83 respectively installed at the opposite ends of the fourth shaft 85. The transmission structure 80 also includes a first gear 81 and a fourth gear 84. The first gear 81 is meshed with the second gear 82, and the third gear 83 is meshed with the fourth gear 84. The axis of the fourth shaft 85 is parallel to the axis of the first shaft 40.

[0099] Specifically, the transmission system of the all-terrain vehicle 100 in this embodiment may include a driving shaft and a driven shaft. The driving shaft may be a connecting shaft connected to the engine 10 to directly transmit the driving force of the engine 10. A transmission component may be provided between the driving shaft and the driven shaft so that the driving shaft drives the driven shaft to rotate. To clearly describe the working principle of the transmission structure 80 in the first embodiment, the first gear 81 is connected to the driving shaft, and the fourth gear 84 is connected to the driven shaft as an example. The first gear 81 and the fourth gear 84 are coaxially arranged, and the axis of the driving shaft is parallel to the axis of the fourth shaft 85. When the driving shaft rotates, it can drive the first gear 81 to rotate, and the first gear 81 drives the second gear 82 to rotate, thereby rotating the fourth shaft 85, which in turn causes the third gear 83 to rotate. The third gear 83 drives the fourth gear 84 to rotate, and the fourth gear 84 drives the driven shaft to rotate. At this time, the transmission from the driving shaft to the driven shaft is completed. Moreover, the driving shaft and the fourth shaft 85, and the fourth shaft 85 and the driven shaft are connected by two pairs of gear pairs, and the first gear 81 and the fourth gear 84 are coaxially arranged, and the axis of the driving shaft and the axis of the fourth shaft 85 are parallel to each other, so that the rotation direction of the driving shaft is the same as the rotation direction of the driven shaft, and the driving shaft and the driven shaft basically extend along a straight line.

[0100] When the drive axle 30 includes a middle bridge 32, the transmission structure 80 is installed on the middle bridge 32, one end of the first shaft 40 is connected to the engine 10, and the other end is connected to the first gear 81 of the transmission structure 80, one end of the second shaft 50 is connected to the fourth gear 84 of the transmission structure 80, and the other end is connected to the rear axle 33. When the engine 10 is working, the engine 10 drives the first shaft 40 to rotate to transmit power to the first gear 81, the first gear 81 drives the second gear 82 to rotate, so that the fourth shaft 85 rotates, and then the third gear 83 drives the fourth gear 84 to rotate, so that the second shaft 50 rotates, and then the power is transmitted to the rear axle 33.

[0101] In this embodiment, the first shaft 40 and the fourth shaft 85, and the fourth shaft 85 and the second shaft 50 are connected by two pairs of gear pairs, and the first gear 81 and the fourth gear 84 are coaxially arranged. The axis of the first shaft 40 and the axis of the fourth shaft 85 are arranged parallel to each other, so that the first shaft 40 and the second shaft 50 extend substantially along a straight line. This reduces the risk of resonance and shaking between the first shaft 40 and the second shaft 50 during transmission, enables the first shaft 40 and the second shaft 50 to smoothly transmit the torque of the engine 10, and improves the driving stability of the all-terrain vehicle 100 on the ground. In addition, the rotation direction of the first shaft 40 is the same as the rotation direction of the second shaft 50, thereby eliminating the need for a reversing component in the rear axle 33, reducing the structural complexity of the rear axle 33 and facilitating cost reduction. At the same time, when upgrading from an existing four-wheel drive all-terrain vehicle to a six-wheel drive or eight-wheel drive all-terrain vehicle in this embodiment, since the rotation direction of the first shaft 40 is the same as the rotation direction of the second shaft 50, the rear axle of the existing four-wheel drive all-terrain vehicle can be retained, thereby reducing the difficulty of design and development.

[0102] In addition, if Figure 4-5 As shown, when the drive axle 30 includes multiple middle bridges 32, adjacent middle bridges 32 are connected through the fifth shaft 70, the first shaft 40 is connected to the adjacent first gear 81, one end of the fifth shaft 70 is connected to the adjacent fourth gear 84, and the other end is connected to the adjacent first gear 81, and the second shaft 50 is connected to the adjacent fourth gear 84.

[0103] For example, the drive axle 30 includes two middle bridges 32. The two middle bridges 32 are named as the first middle bridge 3212 and the second middle bridge 3213 respectively. The engine 10, the first middle bridge 3212, the second middle bridge 3213 and the rear axle 33 are respectively arranged in sequence along the length direction of the all-terrain vehicle 100. The first middle bridge 3212 and the second middle bridge 3213 are connected by the fifth shaft 70. The first middle bridge 3212 and the second middle bridge 3213 are respectively installed with a transmission structure 80. The first shaft 40 is located between the engine 10 and the first middle bridge 3212. Between the first intermediate axle 3212, one end of the first shaft 40 is connected to the engine 10, and the other end is connected to the first gear 81 of the transmission structure 80 mounted on the first intermediate axle 3212. One end of the fifth shaft 70 is connected to the fourth gear 84 of the transmission structure 80 mounted on the first intermediate axle 3212, and the other end is connected to the first gear 81 of the transmission structure 80 mounted on the second intermediate axle 3213. One end of the second shaft 50 is connected to the fourth gear 84 of the transmission structure 80 mounted on the second intermediate axle 3213, and the other end is connected to the rear axle 33. When the engine 10 is operating, the engine 10 transmits power to the transmission structure 80 of the first intermediate axle 3212 via the first shaft 40. The transmission structure 80 of the first intermediate axle 3212 further transmits power to the fifth shaft 70. The fifth shaft 70 transmits power to the transmission structure 80 of the second intermediate axle 3213. The transmission structure 80 of the second intermediate axle 3213 further transmits power to the second shaft 50, and finally transmits power to the rear axle 33 via the second shaft 50.

[0104] In this embodiment, when the drive axle 30 includes multiple intermediate bridges 32, each intermediate bridge 32 is provided with a transmission structure 80. The transmission structure 80 specifically uses two pairs of gear pairs as transmission branches, which can make the rotation directions of the first shaft 40, the second shaft 50 and the fifth shaft 70 the same, and make the first shaft 40, the second shaft 50 and the fifth shaft 70 basically extend along a straight line.

[0105] Furthermore, the pitch circle diameter of the first gear 81 is D1, the pitch circle diameter of the second gear 82 is D2, the pitch circle diameter of the third gear 83 is D3, and the pitch circle diameter of the fourth gear 84 is D4, D1 = D2, D3 = D4.

[0106] Taking the drive axle 30 including a middle axle 32 as an example, when D1=D2 and D3=D4, a constant speed transmission is formed when the first shaft 40 transmits to the fourth shaft 85, and a constant speed transmission is formed when the fourth shaft 85 transmits to the second shaft 50, thereby reducing the risk of gear breakage, increasing the service life of the gear, and thereby improving the operating stability of the transmission system in the all-terrain vehicle 100.

[0107] Specifically, if Figure 7-8 , and refer to Figure 5 、 Figure 9The middle bridge 32 includes a sixth shaft 321, a seventh shaft 322, a fifth gear 323 and a sixth gear 324 that mesh with each other. The fifth gear 323 and the sixth gear 324 are both bevel gears. The axis of the fifth gear 323 is perpendicular to the axis of the sixth gear 324. The pitch circle diameter of the fifth gear 323 is D5, and the pitch circle diameter of the sixth gear 324 is D6. D5<D6. The fifth gear 323 and the first gear 81 are both installed on the sixth shaft 321, and the fourth gear 84 is installed on the seventh shaft 322. The sixth shaft 321 and the seventh shaft 322 are both coaxially arranged with the first shaft 40.

[0108] More specifically, in this embodiment, the sixth gear 324 is connected to a first output shaft and a second output shaft at opposite ends, respectively. The first output shaft is also connected to the left wheel via a first universal joint, and the second output shaft is also connected to the right wheel via a second universal joint. When the sixth shaft 321 rotates, it drives the fifth gear 323 to rotate, which in turn drives the sixth gear 324. The sixth gear 324 drives both the first and second output shafts to rotate. The first output shaft transmits power to the left wheel via the first universal joint, causing the left wheel to rotate. The second output shaft transmits power to the right wheel via the second universal joint, causing the right wheel to rotate.

[0109] When the drive axle 30 includes a center axle 32, one end of the first shaft 40 is connected to the sixth shaft 321, and the other end is connected to the engine 10. One end of the second shaft 50 is connected to the seventh shaft 322, and the other end is connected to the rear axle 33. When the engine 10 is operating, it drives the first shaft 40 to rotate, which in turn drives the sixth shaft 321 to rotate. The sixth shaft 321 drives the fifth gear 323 and the first gear 81 to rotate simultaneously. The first gear 81 transmits power to the second gear 82 to rotate the second gear 82, which in turn rotates the third gear 83 through the fourth shaft 85 to rotate the fourth gear 84. The fourth gear 84 drives the seventh shaft 322 to rotate, which in turn drives the second shaft 50 to rotate, thereby transmitting power to the rear axle 33. The fifth gear 323 transmits power to the sixth gear 324 to rotate the sixth gear 324, which in turn transmits power to the corresponding wheel to rotate the corresponding wheel. Moreover, since D5 < D6, the fifth gear 323 reduces speed when transmitting power to the sixth gear 324.

[0110] In addition, when the drive axle 30 includes multiple intermediate bridges 32 , the first shaft 40 is connected to the adjacent sixth shaft 321 , one end of the fifth shaft 70 is connected to the adjacent sixth shaft 321 , the other end is connected to the adjacent seventh shaft 322 , and the second shaft 50 is connected to the adjacent seventh shaft 322 .

[0111] For example, taking the drive axle 30 including two middle bridges 32 as an example, the engine 10, the first middle bridge 3212, the second middle bridge 3213 and the rear axle 33 are respectively arranged in sequence along the length direction of the all-terrain vehicle 100, and the first middle bridge 3212 and the second middle bridge 3213 are connected by the fifth shaft 70. The first middle bridge 3212 and the second middle bridge 3213 are respectively installed with a transmission structure 80. The first shaft 40 is located between the engine 10 and the first middle bridge 3212. One end of the first shaft 40 is connected to the engine 10, and the other end is connected to the sixth shaft 321 of the transmission structure 80 installed on the first middle bridge 3212. One end of the fifth shaft 70 is connected to the seventh shaft 322 of the transmission structure 80 installed on the first middle bridge 3212, and the other end is connected to the sixth shaft 321 of the transmission structure 80 installed on the second middle bridge 3213. One end of the second shaft 50 is connected to the seventh shaft 322 of the transmission structure 80 installed on the second middle bridge 3213, and the other end is connected to the rear axle 33. When the engine 10 is working, the engine 10 transmits power to the transmission structure 80 of the first middle bridge 3212 through the first shaft 40, the transmission structure 80 of the first middle bridge 3212 continues to transmit power to the fifth shaft 70, the fifth shaft 70 transmits power to the transmission structure 80 of the second middle bridge 3213, the transmission structure 80 of the second middle bridge 3213 continues to transmit power to the second shaft 50, and finally transmits power to the rear axle 33 through the second shaft 50.

[0112] In this embodiment, the first gear 81 can be sleeved on the sixth shaft 321 and have an interference fit with the sixth shaft 321; the fourth gear 84 can be sleeved on the seventh shaft 322 and have an interference fit with the seventh shaft 322; the fifth gear 323 is integrally formed with the sixth shaft 321. Figure 8 、 Figure 10 As shown, the fourth shaft 85, the sixth shaft 321 and the seventh shaft 322 are all sleeved with bearings 329. Since each shaft is correspondingly sleeved with a bearing 329, each shaft can rotate smoothly.

[0113] In the first embodiment, if Figure 5 、 Figure 7-9 As shown, the sixth shaft 321 can be connected to the first shaft 40 through the first coupling 3210, and the seventh shaft 322 can be connected to the second shaft 50 or the fifth shaft 70 through the second coupling 3211. Through the setting of the coupling, the offset between the two shafts due to inaccurate manufacturing and installation, deformation during operation or thermal expansion, etc. can be compensated, and the impact and vibration can be alleviated.

[0114] In the first embodiment, if Figure 5 、 Figure 7-9As shown, the middle bridge 32 also includes a differential 325, which is connected to the sixth gear 324 so that the sixth gear 324 drives the differential 325 to rotate synchronously, and the first output shaft and the second output shaft are respectively connected to two opposite gears in the differential 325, so that the first output shaft and the second output shaft can rotate at different speeds, thereby enabling the left wheel connected to the first output shaft and the right wheel connected to the second output shaft to rotate at different speeds, which can reduce steering resistance and improve the stability of the all-terrain vehicle 100 in this embodiment when turning.

[0115] Specifically, if Figure 10 As shown, the sixth gear 324 in this embodiment includes a body 324a and gear teeth 324b, the gear teeth 324b are arranged along the circumference of the body 324a, and the differential 325 is provided with a shell, and the shell of the differential 325 can be threaded or welded to the body 324a.

[0116] In the first embodiment, if Figure 6 、 Figure 9 As shown, the middle bridge 32 also includes a first shell 326, and the first shell 326 is provided with a first accommodating cavity. The first gear 81, the second gear 82, the third gear 83, the fourth gear 84, the fifth gear 323, the sixth gear 324, the differential 325 and the fifth shaft 70 are all located in the first accommodating cavity, so that the various components of the middle bridge 32 installed with the transmission structure 80 form a whole, which is convenient for the storage, transportation and other operations of the middle bridge 32 installed with the transmission structure 80, and the first shell 326 can provide protection for the various transmission components, reducing the risk of damage to the various transmission components due to bumps and the like.

[0117] More specifically, if Figure 9 As shown, openings are provided on the left side, right side and rear side of the first shell 326, and the first shell 326 also includes a left end cover 326a, a right end cover 326b and a rear end cover 326c, which respectively cover the openings on the left side, right side and rear side of the first shell 326.

[0118] In the first embodiment, if Figure 8 As shown, part of the fourth shaft 85 is a hollow structure, which reduces the weight of the fourth shaft 85 and further reduces the overall weight of the middle bridge 32 on which the transmission structure 80 is installed.

[0119] To facilitate the assembly between the second gear 82, the third gear 83 and the fourth shaft 85, as shown in FIG. Figure 11As shown, the second gear 82 is provided with a first internal spline 821, the third gear 83 is provided with a second internal spline, and the opposite ends of the fourth shaft 85 are respectively provided with a first external spline 851 and a second external spline. The first internal spline 821 cooperates with the first external spline 851 to connect the second gear 82 to one end of the fourth shaft 85, and the second internal spline cooperates with the second external spline to connect the third gear 83 to the other end of the fourth shaft 85.

[0120] In this embodiment, the second gear 82 and the fourth shaft 85, as well as the third gear 83 and the fourth shaft 85 are connected by splines, which is beneficial to improving the concentricity between the second gear 82 and the fourth shaft 85, as well as the concentricity between the third gear 83 and the fourth shaft 85, and facilitates the installation of the second gear 82 and the third gear 83 to the two ends of the fourth shaft 85.

[0121] In the first embodiment, the first gear 81 , the second gear 82 , the third gear 83 and the fourth gear 84 are all helical gears, so that the transmission is smooth and the transmission noise is low.

[0122] According to the second embodiment of the present application, Figure 12 As shown, the transmission shaft is the eighth shaft 88, and the transmission gears are the seventh gear 86 and the ninth gear 87 respectively installed at the opposite ends of the eighth shaft 88. The transmission structure 80 also includes an eighth gear 327 and a tenth gear 328. The eighth shaft 88 and the first shaft 40 extend basically along a straight line. The seventh gear 86, the eighth gear 327, the ninth gear 87 and the tenth gear 328 are all bevel gears. The axis of the seventh gear 86 is perpendicular to the axis of the eighth gear 327, and the axis of the ninth gear 87 is perpendicular to the axis of the tenth gear 328. The seventh gear 86 is meshed with the eighth gear 327, and the ninth gear 87 is meshed with the tenth gear 328.

[0123] Specifically, in this embodiment, the eighth gear 327 is connected to the first output shaft, and the tenth gear 328 is connected to the second output shaft. The first output shaft is also connected to the left wheel via a first universal joint, and the second output shaft is also connected to the right wheel via a second universal joint. When the eighth shaft 88 rotates, it drives the seventh gear 86 and the ninth gear 87 to rotate, which in turn causes the eighth gear 327 and the tenth gear 328 to rotate. The eighth gear 327 drives the first output shaft to rotate, and the tenth gear 328 drives the second output shaft to rotate. The first output shaft transmits power to the left wheel via the first universal joint, thereby rotating the left wheel, and the second output shaft transmits power to the right wheel via the second universal joint, thereby rotating the right wheel.

[0124] When the drive axle 30 includes a middle axle 32, as shown in FIG. Figure 12As shown, one end of the eighth shaft 88 is connected to the first shaft 40, and the other end is connected to the second shaft 50. When the engine 10 is working, the driving force is transmitted to the eighth shaft 88 through the first shaft 40, and the eighth shaft 88 then transmits the driving force to the second shaft 50, and then transmits the driving force to the rear axle 33 through the second shaft 50. The rotation of the eighth shaft 88 can make the seventh gear 86 and the ninth gear 87 rotate at the same time, and the seventh gear 86 transmits power to the eighth gear 327, and the ninth gear 87 transmits power to the tenth gear 328, so that the eighth gear 327 and the ninth gear 87 transmit power to the corresponding wheels, so that the corresponding wheels rotate, that is, the power is directly transmitted to the middle bridge 32 and the rear axle 33 through the eighth shaft 88, without the need to set other transmission components. , which improves the transmission efficiency between the middle bridge 32 and the rear bridge 33; and the first shaft 40 is connected to the second shaft 50 through the eighth shaft 88, so that the rotation direction of the first shaft 40 is the same as the rotation direction of the second shaft 50, thereby eliminating the need to set a reversing component on the rear bridge 33, reducing the structural complexity of the rear bridge 33, and retaining the original rear bridge of the four-wheel drive all-terrain vehicle, reducing the difficulty of design and development, and also allowing the first shaft 40, the eighth shaft 88 and the second shaft 50 to extend basically along a straight line, reducing the risk of resonance and shaking of the first shaft 40, the eighth shaft 88 and the second shaft 50 during the transmission process, so that the first shaft 40, the eighth shaft 88 and the second shaft 50 can smoothly transmit the torque of the engine 10, thereby improving the driving stability of the all-terrain vehicle 100 on the ground.

[0125] Alternatively, when the drive axle 30 includes multiple intermediate axles 32 , adjacent intermediate axles 32 are connected by the fifth shaft 70 , one end of the eighth shaft 88 is connected to the first shaft 40 or the fifth shaft 70 , and the other end is connected to the second shaft 50 or the fifth shaft 70 .

[0126] For example, the drive axle 30 includes two middle bridges 32. The engine 10, the first middle bridge 3212, the second middle bridge 3213 and the rear axle 33 are arranged in sequence along the length direction of the all-terrain vehicle 100. The first middle bridge 3212 and the second middle bridge 3213 are connected by the fifth shaft 70. The first middle bridge 3212 and the second middle bridge 3213 are respectively installed with a transmission structure 80. The first shaft 40 is located between the engine 10 and the first middle bridge 3212. The eighth shaft 88 of the transmission structure 80 installed on the first middle bridge 3212 has one end connected to the first shaft 40 and the other end connected to the fifth shaft 70. ; The eighth shaft 88 of the transmission structure 80 installed on the second intermediate bridge 3213 has one end connected to the fifth shaft 70 and the other end connected to the second shaft 50; when the engine 10 is working, the engine 10 transmits power to the eighth shaft 88 located on the first intermediate bridge 3212 through the first shaft 40, the eighth shaft 88 located on the first intermediate bridge 3212 continues to transmit power to the fifth shaft 70, the fifth shaft 70 transmits power to the eighth shaft 88 located on the second intermediate bridge 3213, the eighth shaft 88 located on the second intermediate bridge 3213 continues to transmit power to the second shaft 50, and finally transmits power to the rear axle 33 through the second shaft 50.

[0127] More specifically, the pitch circle diameter of the seventh gear 86 is D7, the pitch circle diameter of the eighth gear 327 is D8, and D7 < D8. The pitch circle diameter of the ninth gear 87 is D9, and the pitch circle diameter of the tenth gear 328 is D10, and D9 < D10. Because D7 < D8, the seventh gear 86 reduces speed when transmitting to the eighth gear 327; and because D9 < D10, the ninth gear 87 reduces speed when transmitting to the tenth gear 328.

[0128] In the second embodiment, Figure 12 As shown, in this embodiment, part of the structure of the middle bridge 32 and part of the structure of the rear bridge 33 on which the transmission structure 80 is installed are installed in the second shell 90, providing protection for the middle bridge 32 and the rear bridge 33 on which the transmission structure 80 is installed and improving durability.

[0129] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. An all-terrain vehicle comprising: Frame; a body covering, at least partially disposed on the vehicle frame; an engine (10) at least partially disposed on the vehicle frame; Walking component (20); A drive axle (30), wherein the engine (10) drives the travel assembly (20) to rotate via the drive axle (30), the drive axle (30) comprising a front axle (31), a middle axle (32) and a rear axle (33), wherein the middle axle (32) is located between the front axle (31) and the rear axle (33); The invention is characterized in that the engine (10) and the middle bridge (32) are connected via a first shaft (40), the middle bridge (32) and the rear bridge (33) are connected via a second shaft (50), and the front bridge (31) and the engine (10) are connected via a third shaft (60), the first shaft (40), the second shaft (50) and the third shaft (60) extend substantially along a straight line, and the rotation direction of the first shaft (40) is the same as the rotation direction of the second shaft (50); The all-terrain vehicle is provided with a transmission structure (80), the transmission structure (80) is mounted on the middle bridge (32), the transmission structure (80) includes a seventh gear (86), a ninth gear (87) and an eighth shaft (88), the eighth shaft (88) and the first shaft (40) and the second shaft (50) extend substantially along a straight line, the seventh gear (86) and the ninth gear (87) are respectively mounted on opposite ends of the eighth shaft (88); The middle bridge (32) includes an eighth gear (327) and a tenth gear (328), the axis of the seventh gear (86) is perpendicular to the axis of the eighth gear (327), and the seventh gear (86) is meshed with the eighth gear (327), the axis of the ninth gear (87) is perpendicular to the axis of the tenth gear (328), and the ninth gear (87) is meshed with the tenth gear (328); When the drive axle (30) includes one intermediate axle (32), one end of the eighth shaft (88) is connected to the first shaft (40), and the other end is connected to the second shaft (50).

2. The all-terrain vehicle according to claim 1, characterized in that When the drive axle (30) includes a plurality of intermediate axles (32), adjacent intermediate axles (32) are connected via a fifth shaft (70), one end of the eighth shaft (88) is connected to the first shaft (40) or the fifth shaft (70), and the other end of the eighth shaft (88) is connected to the second shaft (50) or the fifth shaft (70).

3. The all-terrain vehicle according to any one of claims 1-2, characterized in that: The pitch circle diameter of the seventh gear (86) is D7, the pitch circle diameter of the eighth gear (327) is D8, and D7 and D8 satisfy D7<D8, the pitch circle diameter of the ninth gear (87) is D9, the pitch circle diameter of the tenth gear (328) is D10, and D9 and D10 satisfy D9<D10.

4. The all-terrain vehicle according to any one of claims 1-2, characterized in that: The seventh gear (86), the eighth gear (327), the ninth gear (87) and the tenth gear (328) are all bevel gears.

5. The all-terrain vehicle according to any one of claims 1-2, characterized in that: The all-terrain vehicle further comprises a second housing (90), wherein the transmission structure (80), a partial structure of the middle bridge (32), and a partial structure of the rear bridge (33) are all installed in the second housing (90).

Images