Bowing steering tractor

Abstract

The utility model discloses an articulated steering tractor which comprises a chassis, a front suspension system, a hood, a cab, a diesel tank, a rear suspension system and a rear output gear box are arranged on the chassis, the chassis comprises a frame, and a power transmission system, a front drive axle, a rear drive axle and a damping device are arranged on the frame. The power transmission system is connected with the frame through the vibration reduction device, the vibration reduction device comprises a first vibration reduction block, a first protective cover arranged on the first vibration reduction block, a second vibration reduction block, a second protective cover, a bolt and a nut matched with the bolt, and the bolt sequentially penetrates through the first protective cover, the first vibration reduction block, the second vibration reduction block and the second protective cover. The nut is matched with the bolt, so that the first vibration reduction block and the second vibration reduction block clamp the frame, and the power transmission system is pressed on the first protective cover; the bowing steering tractor isolates vibration of the chassis and the power transmission system through the damping device, jolt in the running process is reduced, cab resonance is avoided, abrasion of mechanical parts can be reduced, and the service life is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery technology, and in particular, to a tractor with a hinged steering mechanism. Background Technology

[0002] At present, agricultural industrialization, farmer professionalization, and rural community development have become new trends. As the number of people engaged in agricultural production continues to decrease, agricultural mechanization is imminent for new agricultural business entities such as family farms, large-scale professional farmers, rural cooperatives, and leading industrial enterprises.

[0003] Tractors are self-propelled power machines used to traction and drive work machinery to complete various mobile operations. With the development of rural forestry, planting, and animal husbandry, tractors need to be suitable for complex road conditions such as swamps, farmland, mountains, and forest areas.

[0004] Hilly and mountainous terrain is complex, usually with steep slopes and uneven terrain. When traditional tractors travel on such roads, the vibration of the power system and the bumps of the chassis can easily cause resonance and humming in the cab, making the driver's working environment harsh and even affecting the driver's operation. On the other hand, it can also cause accelerated wear and tear on mechanical parts and shorten their service life. Utility Model Content

[0005] This utility model provides a tractor with adjustable steering to solve the technical problem that existing tractors, when traveling on complex terrain in hilly and mountainous areas, are prone to resonance and buzzing in the cab due to vibration of the power system and bumps in the chassis, which leads to accelerated wear of mechanical parts and shortened service life.

[0006] According to one aspect of the present invention, a slack-steering tractor is provided, comprising a chassis on which a front suspension system, a hood, a cab, a diesel tank, a rear suspension system, and a rear output gearbox are mounted. The chassis includes a frame, on which a power transmission system, a front drive axle, a rear drive axle, and a vibration damping device are mounted. The power transmission system is connected to the frame via the vibration damping device. The vibration damping device includes a first damping block, a first protective cover mounted on the first damping block, a second damping block symmetrically arranged with respect to the first damping block, a second protective cover mounted on the second damping block, a bolt, and a nut adapted to the bolt. The bolt passes sequentially through the power system bracket, the first protective cover, the first damping block, the second damping block, and the second protective cover. The nut cooperates with the bolt to clamp the first damping block and the second damping block onto the frame, and the power transmission system presses against the first protective cover.

[0007] Furthermore, the vehicle frame includes a front frame, a middle frame, a rear frame, a swing pin, and a steering cylinder. The front frame and the middle frame are hinged together by the steering pin, and the middle frame and the rear frame are hinged together by the swing pin. The swing pin is arranged perpendicularly to the steering pin. One end of the steering cylinder is hinged to the front frame, and the other end of the steering cylinder is hinged to the middle frame.

[0008] Furthermore, the powertrain system includes a mounting bracket, an engine, a clutch, a gearbox and coupling, a four-wheel drive transfer case, a cross drive shaft, a second drive shaft, a first drive shaft, and a rear output drive shaft. The engine, clutch, gearbox, and four-wheel drive transfer case are mounted on the vehicle frame via the mounting bracket. The power output end of the engine is connected to the input end of the clutch. The first output end of the clutch is connected to the input end of the gearbox. The output end of the gearbox is connected to the input end of the four-wheel drive transfer case via the coupling. The front output end of the four-wheel drive transfer case drives the front drive axle via the first drive shaft. The rear output end of the four-wheel drive transfer case drives the rear drive axle via the cross drive shaft and the second drive shaft. The flange end faces at both ends of the cross drive shaft are equidistant from the steering pin shaft. The second output end of the clutch transmits power to the rear output gearbox via the rear output drive shaft.

[0009] Furthermore, the steering cylinder is provided with cylinder limit blocks to restrict its retraction.

[0010] Furthermore, a steering limit plate is provided on the front frame, and a steering limit block is provided on the intermediate frame. The steering limit plate and the steering limit block cooperate to limit the maximum turning angle of the front frame and the intermediate frame.

[0011] Furthermore, a swing limiting block is provided on the intermediate frame, and a swing limiting plate is provided on the rear frame. The swing limiting block and the swing limiting plate cooperate to limit the maximum swing angle of the intermediate frame and the rear frame.

[0012] Furthermore, the front frame and / or the intermediate frame are provided with a first bearing for connecting the steering pin, and the intermediate frame and / or the rear frame are provided with a second bearing for connecting the swing pin.

[0013] Furthermore, the front drive axle is equipped with a front wheel or a front triangular track, and the rear drive axle is equipped with a rear wheel or a rear triangular track.

[0014] Furthermore, the frame is equipped with a towing rod for towing agricultural implements, the towing rod being located below the rear output gearbox, and the frame is equipped with a ladder platform for entering the cab.

[0015] This utility model has the following beneficial effects:

[0016] This utility model of a folding steering tractor features a power transmission system pressed against a first protective cover of a vibration damping device. The first and second vibration damping blocks clamp the frame, with a buffer gap between the first protective cover and the top surface of the frame, and a similar buffer gap between the second protective cover and the bottom surface of the frame. When driving on complex terrain such as hilly areas, the compression deformation and resetting of the first and second vibration damping blocks effectively isolate vibrations between the chassis and the power transmission system, reducing bumps during driving and preventing cab resonance. This reduces wear on mechanical parts, extending their service life, and also reduces noise, preventing resonance from affecting the driver and providing a better working environment. The front suspension system can be equipped with a front suspension system or front counterweight as needed to connect implements requiring high stability and traction, such as plows and harrows. The rear suspension system connects implements requiring high flexibility and adaptability, such as seeders and harvesters. The rear output gearbox provides power to rear-mounted implements, effectively meeting the tractor's rear output requirements. Its component combinations are flexible and versatile, suitable for various operating sites.

[0017] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0019] Figure 1 This is a schematic diagram of the structure of a folding steering tractor according to a preferred embodiment of the present invention;

[0020] Figure 2 This is a front view of a preferred embodiment of the folding steering tractor of this utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the machine cover according to a preferred embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the frame structure of a preferred embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the structure of the heat sink according to a preferred embodiment of the present invention;

[0024] Figure 6 This is one of the structural schematic diagrams of the first bearing in a preferred embodiment of this utility model;

[0025] Figure 7 This is one of the structural schematic diagrams of the second bearing in a preferred embodiment of this utility model;

[0026] Figure 8 This is the second schematic diagram of the structure of the first bearing in a preferred embodiment of this utility model;

[0027] Figure 9 This is the second schematic diagram of the structure of the second bearing in a preferred embodiment of this utility model;

[0028] Figure 10 This is a schematic diagram of the structure of the hydraulic cylinder limiting block according to a preferred embodiment of the present invention;

[0029] Figure 11 This is a structural schematic diagram of the maximum steering angle of the folding steering tractor according to a preferred embodiment of the present invention;

[0030] Figure 12 This is a schematic diagram of the power transmission system of a preferred embodiment of the present invention;

[0031] Figure 13 This is a schematic diagram of the structure of the rear output drive shaft of a preferred embodiment of the present invention;

[0032] Figure 14 This is a schematic diagram of the vibration damping device according to a preferred embodiment of the present invention;

[0033] Figure 15 This is a schematic diagram of the structure of the steering limit plate according to a preferred embodiment of the present invention;

[0034] Figure 16 This is a schematic diagram of the structure of the swing limiting plate according to a preferred embodiment of the present invention;

[0035] Figure 17 This is a schematic diagram of the front triangular track of a preferred embodiment of the present invention.

[0036] Legend:

[0037] 1. Chassis; 2. Front Suspension System; 3. Engine Hood; 4. Cab; 5. Diesel Tank; 6. Rear Suspension System; 7. Ladder Platform; 8. Drawbar; 9. Rear Output Gearbox; 11. Frame; 111. Front Frame; 112. Intermediate Frame; 113. Rear Frame; 114. Steering Pin; 115. Swing Pin; 1151. Through Hole; 116. Steering Cylinder; 117. Steering Limit Plate; 118. Steering Limit Block; 119. Swing Limit Block; 1110. Cylinder Limit Block; 1111. Swing Limit Plate; 12. Power Transmission System; 121. Mounting Bracket; 122. Engine; 123. Clutch; 124. Transmission 125. Gearbox; 126. Coupling; 127. Four-wheel drive transfer case; 128. First cross drive shaft; 129. Second drive shaft; 1210. First drive shaft; 1211. Third drive shaft; 1212. Second cross drive shaft; 1213. Fourth drive shaft; 14. Front drive axle; 15. Front wheel; 16. Rear drive axle; 17. Rear wheel; 18. Front triangular track; 18. Vibration damping device; 182. First vibration damping block; 183. First protective cover; 184. Second vibration damping block; 185. Second protective cover; 181. Bolt; 186. Nut; 19. Rear triangular track; 20. First bearing; 21. Second bearing; 22. Radiator. Detailed Implementation

[0038] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0039] Please refer to the following: Figures 1 to 17 The tractor with adjustable steering in this embodiment includes a chassis 1. A front suspension system 2, a hood 3, a cab 4, a diesel tank 5, a rear suspension system 6, and a rear output gearbox 9 are mounted on the chassis 1. The chassis 1 includes a frame 11, on which a power transmission system 12, a front drive axle 13, a rear drive axle 15, and a vibration damping device 18 are mounted. The power transmission system 12 is connected to the frame 11 via the vibration damping device 18. The vibration damping device 18 includes a first damping block 182 and a first protective cover mounted on the first damping block 182. 183, a second damping block 184 symmetrically arranged with the first damping block 182, a second protective cover 185 arranged on the second damping block 184, a bolt 181 and a nut 186 adapted to the bolt 181, the bolt 181 passing through the first protective cover 183, the first damping block 182, the second damping block 184 and the second protective cover 185 in sequence, the nut 186 cooperating with the bolt 181 so that the first damping block 182 and the second damping block 184 clamp the frame 11, and the power transmission system 12 presses on the first protective cover 183.

[0040] In this embodiment of the folding steering tractor, the power transmission system 12 presses against the first cover 183 of the vibration damping device 18. The first damping block 182 and the second damping block 184 clamp the frame 11. A buffer gap is left between the first cover 183 and the top surface of the frame 11, and a buffer gap is also left between the second cover 185 and the bottom surface of the frame 11. When driving on complex terrain such as hills and mountains, the compression deformation and reset of the first damping block 182 and the second damping block 184 can effectively isolate the vibration between the chassis 1 and the power transmission system 12, reduce bumps during driving, and avoid the cab 4 from being disturbed. Vibration reduction, on the one hand, can reduce wear and tear on mechanical parts and extend their service life; on the other hand, it can reduce noise and avoid the impact of vibration on the driver, providing a good working environment for the driver; the front suspension system 2 can be equipped with a front counterweight or connected to implements requiring high stability and traction, such as plows and harrows, as needed; the rear suspension system 6 is used to connect implements requiring high flexibility and adaptability, such as seeders and harvesters; the rear output gearbox 9 provides power to rear-mounted implements, effectively meeting the rear output requirements of the tractor, and its component combinations are flexible and versatile, suitable for various working sites. Optionally, such as Figure 3 As shown, the engine cover 3 is hinged to the cab 4, allowing the engine cover 3 to rotate and open around axis C, facilitating the cleaning of the radiator 22 and the maintenance of the power transmission system 12.

[0041] like Figure 4 and Figure 5As shown, in this embodiment, the frame 11 includes a front frame 111, a middle frame 112, a rear frame 113, a swing pin 115, and a steering cylinder 116. The front frame 111 and the middle frame 112 are hinged together by a steering pin 114, and the middle frame 112 and the rear frame 113 are hinged together by a swing pin 115. The swing pin 115 is perpendicular to the steering pin 114. The axis of the steering pin 114 is shaft A, and the axis of the swing pin 115 is shaft B. Shaft A and shaft B are perpendicular to each other. One end of the steering cylinder 116 is connected to the front frame 111. 1. The steering cylinder 116 is hinged to the intermediate frame 112 at one end. The cab 4 is mounted on the front frame 111. When the steering cylinder 116 drives the front frame 111 to turn, it ensures that the driver's field of vision is always parallel to the direction of travel. The diesel tank 5, the rear suspension system 6, and the rear output gearbox 9 are mounted on the rear frame 113. The intermediate frame 112 is used as a transition structure to separate the frame steering structure from the swing structure, resulting in clear structural functional zoning. This reduces structural complexity while improving installation and maintenance performance. The power system is installed on the first... On the protective cover 183, the vibration damping device 18 is mounted on the front frame 111 through the cooperation of the first vibration damping block 182 and the second vibration damping block 184. The front suspension system 2, the engine cover 3, the power transmission system 12, and the cab 4 are arranged on the front frame 111, which can effectively ensure that the front axle of the tractor still bears no less than 20% of the total vehicle weight under extreme working conditions, and can effectively prevent wheelie. The front frame 111 and the intermediate frame 112 are hinged through the steering pin 114. One end of the steering cylinder 116 is hinged to the front frame 111, and the other end of the steering cylinder 116 is hinged to the intermediate frame 112. The intermediate frame 112 is hinged. When the steering cylinder 116 is activated, it causes the front frame 111 to tilt relative to the intermediate frame 112 around axis A, thereby enabling the tractor to make small-radius turns and effectively reducing the minimum turning radius. The intermediate frame 112 is hinged to the rear frame 113 via a swing pin 115, allowing the rear frame 113 to swing left and right around axis B in the vertical plane. This reduces the occurrence of a single wheel leaving the ground when the tractor is traveling on uneven terrain, reducing bumps during travel, thereby reducing wear on parts and extending service life. Optionally, such as... Figure 5 As shown, two steering cylinders 116 are symmetrically arranged on both sides of the intermediate frame 112. When turning, the two steering cylinders 116 work simultaneously. One steering cylinder 116 extends to push the front frame 111 to turn, and the other steering cylinder 116 retracts to pull the front frame 111 to turn. Compared with using a single high-thrust cylinder, using two low-thrust steering cylinders 116 can reduce costs.

[0042] like Figure 12 , Figure 13As shown, in this embodiment, the power transmission system 12 includes a mounting bracket 121, an engine 122, a clutch 123, a gearbox 124 and a coupling 125, a four-wheel drive transfer case 126, a first cross drive shaft 127, a second drive shaft 128, a first drive shaft 129 and a rear output drive shaft. The power transmission system 12 includes a mounting bracket 121, an engine 122, a clutch 123, a gearbox 124 and a coupling 125. The four-wheel drive transfer case 126 is mounted on the frame 11 via a mounting bracket 121. The power output of the engine 122 is connected to the input of the clutch 123. The first output of the clutch 123 is connected to the input of the gearbox 124. The output of the gearbox 124 is connected to the input of the four-wheel drive transfer case 126 via a coupling 125. The front output of the four-wheel drive transfer case 126 drives the front drive axle 13 via a first drive shaft 129. The rear output of the four-wheel drive transfer case 126 drives the front drive axle 13 via a first cross drive shaft 127. The second drive shaft 128 drives the rear drive axle 15. The flange end faces at both ends of the first cross drive shaft 127 are equidistant from the steering pin shaft 114. The second output end of the clutch 123 transmits power to the rear output gearbox 9 through the rear output drive shaft. The distance from the flange end faces at both ends of the first cross drive shaft 127 to shaft A is L, so that when the tractor bends and turns, the four-wheel drive transfer case 126 can transmit the power of the power transmission system 12 to the rear drive axle 15, thereby realizing four-wheel drive and enabling the tractor to adapt to the complex terrain of hilly and mountainous areas, greatly improving the tractor's passability on uneven working roads. The power transmission system 12 adopts the traditional dual-clutch and gearbox transmission route, which is economical and easy to implement. The engine 122, clutch 123, gearbox 124, coupling 125 and four-wheel drive transfer case 126 are externally installed through the mounting bracket 121 and then uniformly hoisted on the front frame 111. The power transmission system 12 and the front frame 111 are independently arranged, which facilitates disassembly, maintenance and debugging. Optionally, the two steering pins 114 are hinged to the upper and lower ends of the front frame 111 and the intermediate frame 112, respectively. Compared with a long through shaft, the two short pins can reduce the weight of the steering shaft and provide clearance for the second drive shaft 128. The second drive shaft 128 can pass through the gap between the two steering pins 114 and the through hole 1151 on the swing pin 115 to connect the front drive axle 13 and the rear drive axle 15. The second drive shaft 128 is installed in the frame and can protect the power transmission shaft, avoiding damage to the power transmission shaft caused by collisions in the complex terrain of hilly and mountainous areas.

[0043] like Figure 13As shown, in this embodiment, the rear output drive shaft includes a third drive shaft 1210 connected to the second output end of the clutch 123, a fourth drive shaft 1212 connected to the input end of the rear output gearbox 9, and a second cross drive shaft 1211 for connecting the third drive shaft 1210 and the fourth drive shaft 1212; the third drive shaft 1210 is mounted on the front frame 111, and the fourth drive shaft 1212 is mounted on the rear frame 113. When the tractor turns, the second cross drive shaft 1211 can follow the sway of the intermediate frame 112, thereby transmitting power to the rear output gearbox 9.

[0044] like Figure 10 As shown, in this embodiment, the steering cylinder 116 is provided with a cylinder limiting block 1110 to restrict its retraction; when turning is required, the cylinder limiting block 1110 is removed from the piston rod, so that the steering cylinder 116 can extend and retract freely, allowing the tractor to smoothly complete the turning / U-turn action; after the tractor turns / U-turns, when the cylinder limiting block 1110 is installed on the piston rod of the steering cylinder 116, the retraction of the steering cylinder 116 can be restricted, so that the tractor can maintain straight-line travel.

[0045] like Figure 11 , Figure 12 and Figure 15 As shown, in this embodiment, a steering limiting plate 117 is provided on the front frame 111, and a steering limiting block 118 is provided on the intermediate frame 112. The steering limiting plate 117 and the steering limiting block 118 cooperate to limit the maximum turning angle α of the front frame 111 and the intermediate frame 112. A steering limiting groove is provided on the steering limiting plate 117, and the steering limiting block 118 is arranged in the steering limiting groove. When the tractor is traveling horizontally, the steering limiting block 118 is located in the center of the steering limiting groove. When the tractor turns, the front frame 111 can swing left and right around axis A in the horizontal plane. The front frame 111 swings to the left in the horizontal plane until the left side wall of the steering limit groove abuts against the steering limit block 118. At this point, the swing angle between the front frame 111 and the intermediate frame 112 is the maximum swing angle α. Similarly, the front frame 111 swings to the right in the horizontal plane until the right side wall of the steering limit groove abuts against the steering limit block 118. Again, the swing angle between the front frame 111 and the intermediate frame 112 is the maximum swing angle α. Presetting the maximum swing angle α according to the tractor's dimensions can minimize the tractor's turning radius while avoiding interference between components on the frame. Optionally, the maximum turning angle α is 30–45°. If the maximum turning angle α is greater than 45°, it may cause interference between components on the frame, and the internal wear of the tractor will increase significantly, leading to a shortened lifespan of the transmission structure. If the maximum swing angle α is less than 30°, the tractor's turning radius is too large, resulting in poor maneuverability in narrow areas. Optionally, the maximum turning angle α is 40°.

[0046] like Figure 12 and Figure 16 As shown, in this embodiment, a swing limiting block 119 is provided on the intermediate frame 112, and a swing limiting plate 1111 is provided on the rear frame 113. The swing limiting block 119 and the swing limiting plate 1111 cooperate to limit the maximum swing angle β of the intermediate frame 112 and the rear frame 113. An arc-shaped limiting groove is provided on the swing limiting plate 1111, and the swing limiting block 119 is arranged in the arc-shaped limiting groove. When the tractor is traveling horizontally, the swing limiting block 119 is located in the center of the arc-shaped limiting groove. When the tractor enters uneven terrain, the rear frame 113 can swing left and right around axis B in the vertical plane. When the rear frame 113 swings to the right in the vertical plane until the right side wall of the arc-shaped limiting groove abuts the swing limiting block 119, the swing angle between the intermediate frame 112 and the rear frame 113 is the maximum swing angle β. When the rear frame 113 swings to the left in the vertical plane until the left side wall of the arc-shaped limiting groove abuts the swing limiting block 119, the swing angle between the intermediate frame 112 and the rear frame 113 is also the maximum swing angle β. The maximum swing angle β is preset according to the center of gravity height of the rear frame 113, which can ensure the tractor's passability on uneven terrain while preventing the tractor from overturning. Optionally, the maximum swing angle β is 10–20°. If the maximum swing angle β is greater than 20°, the swing amplitude of the rear frame 113 is too large, which may cause the tractor to overturn. If the maximum swing angle β is less than 10°, the swing amplitude of the rear frame 113 is too small, and the tractor has poor passability on uneven terrain. Optionally, the maximum swing angle β is 11°.

[0047] In this embodiment, a first bearing 20 for connecting the steering pin 114 is provided on the front frame 111 and / or the intermediate frame 112. The first bearing 20 can reduce frictional resistance during steering and extend the service life of the frame. A second bearing 21 for connecting the swing pin 115 is provided on the intermediate frame 112 and / or the rear frame 113. The second bearing 21 can reduce frictional resistance during swinging and extend the service life of the frame. Optionally, as... Figure 6 As shown, the first bearing 20 is a rolling bearing, which is mounted on the front frame 111. The steering pin 114 is mounted on the intermediate frame 112 and hinged to the front frame 111 via the rolling bearing. The rolling bearing has low frictional resistance, which can reduce the frictional resistance of the front frame 111 relative to the intermediate frame 112 during steering. Optionally, as... Figure 8As shown, the first bearing 20 is a sliding bearing. Two sliding bearings are respectively mounted on the front frame 111 and the intermediate frame 112. The steering pin 114 is hinged to the front frame 111 and the intermediate frame 112 through the sliding bearings. The sliding bearing has a large bearing area and is buffered by a lubricating oil film, making it more impact-resistant and suitable for rugged roads in hilly and mountainous areas. Optionally, the first bearing 20 is a spherical plain bearing. The outer ring of the spherical plain bearing is connected to the front frame 111, and the inner ring of the spherical plain bearing is connected to the steering pin 114. The spherical plain bearing not only hinges the front frame 111 and the intermediate frame 112, but also allows the steering pin 114 to have a certain amount of sway space relative to the front frame 111, allowing the connection between the front frame 111 and the intermediate frame 112 to arch upwards, improving the tractor's passability on rugged roads in hilly and mountainous areas. Optionally, as... Figure 7 As shown, the second bearing 21 is a rolling bearing, which is mounted on the intermediate frame 112. The swing pin 115 is mounted on the rear frame 113 and hinged to the intermediate frame 112 via the rolling bearing. The rolling bearing has low frictional resistance, which reduces the frictional resistance of the rear frame 113 relative to the intermediate frame 112. Optionally, as... Figure 9 As shown, the second bearing 21 is a sliding bearing, which is mounted on the intermediate frame 112. The swing pin 115 is mounted on the rear frame 113 and is hinged to the intermediate frame 112 through the sliding bearing. The sliding bearing has a large bearing area and is buffered by a lubricating oil film, making it more resistant to impact and suitable for rugged roads in hilly and mountainous areas.

[0048] Optionally, the second bearing 21 is a spherical plain bearing. The outer ring of the spherical plain bearing is connected to the intermediate frame 112, and the inner ring of the spherical plain bearing is connected to the swing pin 115. The spherical plain bearing can not only hinge the intermediate frame 112 and the rear frame 113, but also make the connection between the intermediate frame 112 and the rear frame 113 arch upward, which can improve the tractor's passability on the rugged roads of hilly and mountainous areas.

[0049] like Figure 12 As shown, in this embodiment, the front frame 111 is equipped with the front drive axle 13 via the front axle mounting bracket, and front wheels 14 are mounted on the left and right sides of the front drive axle 13. The rear frame 113 is equipped with the rear drive axle 15 via the rear axle mounting bracket, and rear wheels 16 are mounted on the left and right sides of the rear drive axle 15 respectively. The front wheels 14 and the rear wheels 16 are rubber pneumatic tires, suitable for highways and mountain roads.

[0050] like Figure 17 As shown, in this embodiment, the front frame 111 is equipped with the front triangular track 17 via the front track wheel mounting seat, and the front triangular track 17 is driven by the front drive axle 13. The rear frame 113 is equipped with the rear triangular track 19 via the rear track wheel mounting seat, and the rear triangular track 19 is driven by the rear drive axle 15. It can adapt to road conditions such as snow, mud, and sand.

[0051] like Figure 2 As shown, in this embodiment, a towing rod 8 for towing agricultural implements is provided on the frame 11, and the towing rod 8 is located below the rear output gearbox 9; the towing rod 8 serves as a support point to provide traction force for the agricultural implements or trailers connected to the rear frame 113.

[0052] like Figure 1 and Figure 2 As shown, in this embodiment, a ladder platform 7 for entering the cab 4 is provided on the frame 11. The ladder platform 7 is located on the left and right sides of the bottom of the cab 4 and is fixed on the chassis 1.

[0053] This utility model of a folding steering tractor adopts a folding structure. The front frame 111 can swing left and right around axis A, which can effectively reduce the minimum turning radius. The rear frame 113 can swing up and down around axis B. This structure ensures that all four tires are firmly fixed to the ground when passing through uneven road areas. The chassis 1 adopts four-wheel drive, which has strong passability. In addition, since the cab 4 is far from the rear drive axle 15, the swinging of the rear drive axle 15 can reduce the impact of vibration caused by the whole vehicle when passing through uneven road surfaces on the driver. The tractor has an independent frame 11, and the power transmission system 12, cab 4 and other components are independently installed on the frame 11, thereby improving the maintainability of the whole vehicle. The hood 3 can be opened upwards to facilitate cleaning of the radiator 22 and maintenance of the power transmission system 12. The tractor has both tire and track modes, and in tire mode, it can be switched to dual-tire or multi-tire mode as needed.

[0054] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A tractor with adjustable steering, characterized in that, The system includes a chassis (1), on which a front suspension system (2), engine hood (3), cab (4), diesel tank (5), rear suspension system (6), and rear output gearbox (9) are mounted. The chassis (1) includes a frame (11), on which a power transmission system (12), front drive axle (13), rear drive axle (15), and shock absorber (18) are mounted. The power transmission system (12) is connected to the frame (11) through the shock absorber (18). The shock absorber (18) includes a first damping block (182), a first protective cover (183) mounted on the first damping block (182), and a shield connected to the first damping block (182). The second damping block (184) is symmetrically arranged, the second cover (185) is arranged on the second damping block (184), the bolt (181) and the nut (186) adapted to the bolt (181) are arranged in sequence. The bolt (181) passes through the power system bracket, the first cover (183), the first damping block (182), the second damping block (184) and the second cover (185) in sequence. The nut (186) cooperates with the bolt (181) so that the first damping block (182) and the second damping block (184) clamp the frame (11). The power transmission system (12) presses on the first cover (183).

2. The articulated steering tractor according to claim 1, characterized in that, The frame (11) includes a front frame (111), a middle frame (112), a rear frame (113), a swing pin (115), and a steering cylinder (116). The front frame (111) and the middle frame (112) are hinged together by a steering pin (114). The middle frame (112) and the rear frame (113) are hinged together by a swing pin (115). The swing pin (115) and the steering pin (114) are arranged perpendicularly. One end of the steering cylinder (116) is hinged to the front frame (111), and the other end of the steering cylinder (116) is hinged to the middle frame (112).

3. The articulated steering tractor according to claim 2, characterized in that, The power transmission system (12) includes a mounting bracket (121), an engine (122), a clutch (123), a gearbox (124), a coupling (125), a four-wheel drive transfer case (126), a first cross drive shaft (127), a second drive shaft (128), a first drive shaft (129), and a rear output drive shaft. The power system includes a mounting bracket (121), an engine (122), a clutch (123), a gearbox (124), and a coupling (125). The engine (122), clutch (123), gearbox (124), and four-wheel drive transfer case (126) are mounted on the vehicle frame (11) via the mounting bracket (121). The power output end of the engine (122) is connected to the input end of the clutch (123). The first output end of the clutch (123) is connected to the input end of the gearbox (124). The output end of the gearbox (124) is connected to the input end of the four-wheel drive transfer case (126) through the coupling (125). The front output end of the four-wheel drive transfer case (126) drives the front drive axle (13) through the first drive shaft (129). The rear output end of the four-wheel drive transfer case (126) drives the rear drive axle (15) through the first cross drive shaft (127) and the second drive shaft (128). The flange end faces at both ends of the first cross drive shaft (127) are equidistant from the steering pin shaft (114). The second output end of the clutch (123) transmits power to the rear output gearbox (9) through the rear output drive shaft.

4. The articulated steering tractor according to claim 3, characterized in that, The rear output drive shaft includes a third drive shaft (1210) connected to the second output end of the clutch (123), a fourth drive shaft (1212) connected to the input end of the rear output gearbox (9), and a second cross drive shaft (1211) for connecting the third drive shaft (1210) and the fourth drive shaft (1212).

5. The articulated steering tractor according to any one of claims 2 to 4, characterized in that, The steering cylinder (116) is provided with cylinder limit blocks (1110) for limiting its retraction.

6. The articulated steering tractor according to any one of claims 2 to 4, characterized in that, A steering limit plate (117) is provided on the front frame (111), and a steering limit block (118) is provided on the intermediate frame (112). The steering limit plate (117) and the steering limit block (118) cooperate to limit the maximum turning angle of the front frame (111) and the intermediate frame (112).

7. The articulated steering tractor according to any one of claims 2 to 4, characterized in that, The intermediate frame (112) is provided with a swing limiting block (119), and the rear frame (113) is provided with a swing limiting plate (1111). The swing limiting block (119) and the swing limiting plate (1111) cooperate to limit the maximum swing angle of the intermediate frame (112) and the rear frame (113).

8. The articulated steering tractor according to any one of claims 2 to 4, characterized in that, The front frame (111) and / or the intermediate frame (112) are provided with a first bearing (20) for connecting the steering pin (114), and the intermediate frame (112) and / or the rear frame (113) are provided with a second bearing (21) for connecting the swing pin (115).

9. The articulated steering tractor according to claim 1, characterized in that, The front drive axle (13) is provided with a front wheel (14) or a front triangular track (17), and the rear drive axle (15) is provided with a rear wheel (16) or a rear triangular track (19).

10. The articulated steering tractor according to claim 1, characterized in that, The frame (11) is provided with a towing rod (8) for towing agricultural implements. The towing rod (8) is located below the rear output gearbox (9). The frame (11) is provided with a ladder platform (7) for entering the cab (4).

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