A light tracked tractor

Abstract

This invention provides a lightweight tracked tractor, relating to the field of agricultural machinery. The lightweight tracked tractor includes a chassis, a track drive unit, and a mounting frame. The mounting frame includes a fixed frame, a movable frame, and a lifting assembly. The lifting assembly can raise or lower the movable frame, thereby adjusting the height of the mounting plate. This allows the mounting plate to be adapted to mounting frames of different heights, thus enabling the mounting of agricultural machinery of different specifications and types. Furthermore, by setting guide limit blocks and guide limit grooves, the movable frame and mounting plate can be limited in the front-rear direction, ensuring structural stability. Compared to existing technologies, the lightweight tracked tractor provided by this invention can adaptively adjust the mounting position according to different specifications and types of agricultural machinery, thus being suitable for a variety of different specifications of agricultural machinery, offering better adaptability. Moreover, it has higher structural stability, ensuring the reliability of agricultural machinery mounting.

Description

Technical Field

[0001] This invention relates to the field of agricultural machinery, and more specifically, to a light-duty tracked tractor. Background Technology

[0002] In recent years, with the rapid advancement of agricultural land transfer in my country and the continuous expansion of land management area, tractors have been widely used in northern and plain areas, playing an irreplaceable role in improving agricultural mechanization and supporting the development of modern agriculture. In the hilly and mountainous areas of southern China, small four-wheeled tractors with power of 30-40 horsepower and large and medium-sized tractors with power of over 50 horsepower face problems such as easy sinking in paddy fields, poor slope stability, and damage to the topsoil layer. Land cultivation mainly relies on micro-tillers. However, micro-tillers are labor-intensive, have limited functions, and low operating efficiency, and can no longer meet the needs of moderately scaled agricultural production. To meet the operational requirements of deep muddy paddy fields, small terraced fields, and orchards in the hilly and mountainous areas of southern China, reduce labor intensity, and improve operating efficiency, there is an urgent need to develop a 30-50 horsepower versatile light-duty tracked power platform for both paddy and dry land use. This platform would serve as an effective supplement to micro-tillers, small four-wheeled tractors, and large and medium-sized tractors, achieving a leapfrog development of small and medium-power tracked tractors, improving the level of agricultural mechanization equipment in the hilly and mountainous areas of southern China, and supporting the development of modern, high-efficiency, and characteristic mountain agriculture.

[0003] The inventors' research revealed that existing tracked micro-tillers can usually only be attached to a single type of agricultural machinery. They cannot adapt the attachment position to different types and sizes of agricultural machinery, which can easily lead to incompatibility and thus reduce the applicability of the tractor and limit its functionality. Summary of the Invention

[0004] The purpose of this invention is to provide a lightweight tracked tractor that can adaptably adjust the mounting position according to different specifications and types of agricultural machinery, thereby making it suitable for a variety of different specifications of agricultural machinery and having better adaptability.

[0005] The present invention is achieved by the following technical solution.

[0006] This invention provides a lightweight tracked tractor, including a carrier chassis, track drive devices disposed on both sides of the carrier chassis, and a mounting frame disposed at the rear end of the carrier chassis. The track drive devices drive the carrier chassis to move. The mounting frame includes a fixed frame, a movable frame, and a lifting assembly. The fixed frame is fixedly disposed at the rear end of the carrier chassis, and the movable frame is movably disposed on the top of the fixed frame. The movable frame is also provided with a mounting plate, which has mounting holes for connecting external agricultural machinery. The lifting assembly is disposed on the fixed frame and is kinetically connected to the movable frame, used to raise or lower the movable frame to adjust the height of the mounting plate. The movable frame is also provided with a guide limiting block, and the fixed frame has a guide limiting groove. The guide limiting block is slidably accommodated in the guide limiting groove, which limits the guide limiting block in the front-rear direction.

[0007] Furthermore, the fixed frame is provided with a mounting groove, the lifting component is disposed in the mounting groove and fixedly connected to the fixed frame, and the movable frame is disposed at the top opening of the mounting groove so that the hanging plate is located at the top of the mounting groove. The hanging plate extends backward out of the movable frame, and there are two hanging holes. The two hanging holes are disposed at intervals on the hanging plate. One hanging hole is disposed on the part of the hanging plate that extends out of the movable frame, and the other hanging hole is disposed on the part of the hanging plate that engages with the movable frame and penetrates the movable frame.

[0008] Furthermore, the mounting hole is an oblong hole, with its long axis arranged along the front-to-back direction. Limiting grooves are also provided on both sides of the mounting hole, each containing multiple locking teeth. A connecting bolt is provided on the mounting hole for connecting the external agricultural machinery and the mounting plate. A limiting washer is also provided on the connecting bolt, with a portion of the limiting washer extending into the limiting groove and engaging with some of the locking teeth to limit the movement of the connecting bolt.

[0009] Furthermore, the limiting pad has an inverted U-shaped cross section, and both sides of the limiting pad are provided with serrated protrusions that are adapted to the locking teeth. The serrated protrusions are used to engage with a portion of the locking teeth.

[0010] Furthermore, the fixing frame is also provided with a plurality of auxiliary mounting holes, which are also oval holes, and the major axes of the plurality of auxiliary mounting holes are parallel to each other, and the major axis of each auxiliary mounting hole is perpendicular to the major axis of the hanging hole.

[0011] Furthermore, the drive cylinder includes a first hydraulic cylinder and a second hydraulic cylinder. The fixed frame on the opposite sidewall of the mounting groove is provided with guide limiting grooves. The two sides of the movable frame are provided with guide limiting blocks. The two guide limiting blocks are slidably assembled in the two guide limiting grooves. The first hydraulic cylinder and the second hydraulic cylinder are fixedly connected to the bottom wall of the mounting groove and are respectively located close to the opposite sidewall of the mounting groove. The first hydraulic cylinder and the second hydraulic cylinder are respectively connected to the opposite sidewall of the two guide limiting blocks to drive the movable frame to rise or fall.

[0012] Furthermore, a carrier box is also provided on the carrier chassis, and a power source motor is provided inside the carrier box. The power source motor is fixed to the carrier chassis, and the output shaft of the power source motor extends rearward through the mounting groove. A power conversion connector is also provided at the rear end of the output shaft. The power conversion connector is used to be adapted to the power interface on the external agricultural machinery to provide power to the external agricultural machinery.

[0013] Furthermore, the carrier box includes a carrier frame and a carrier top plate. The carrier frame is fixedly connected to the carrier chassis. The carrier top plate is disposed on the top of the carrier frame. The front end of the hanging plate extends forward from the movable frame. The rear end of the carrier top plate has a relief groove whose shape is adapted to the front end of the hanging plate. The depth of the relief groove is adapted to the thickness of the hanging plate, so that the hanging plate is accommodated in the relief groove when it is at its lowest point, and the carrier top plate and the hanging plate are flush.

[0014] Furthermore, the track drive device includes a drive wheel, a front wheel, a rear wheel, a load-bearing wheel, and a drive track. The front wheel is rotatably connected to the load-bearing base via a first load-bearing rod. Load-bearing side frames are also provided on both sides of the load-bearing chassis. The rear wheel and the load-bearing wheel are rotatably mounted on the load-bearing side frames. The drive wheel is located above the line connecting the front wheel and the rear wheel. A drive motor is also provided on the load-bearing chassis. The drive motor is connected to the drive wheel for driving the drive wheel to rotate. The drive wheel belt is wound around the front wheel, the load-bearing wheel, the rear wheel, and the drive wheel, and rotates under the drive of the drive wheel.

[0015] Furthermore, a first battery pack is provided at the bottom of the supporting chassis, and the first battery pack is electrically connected to the power source motor for supplying power to the power source motor; a second battery pack is also provided at the front end of the supporting chassis, and the second battery pack is connected to the drive motor for supplying power to the drive motor.

[0016] The present invention has the following beneficial effects:

[0017] This invention provides a lightweight tracked tractor, in which track drive devices are mounted on both sides of a carrier chassis for movement. A fixed frame is fixed to the rear of the carrier chassis, and a movable frame is movably mounted on top of the fixed frame. The movable frame also has a mounting plate with mounting holes for connecting external agricultural machinery. A lifting assembly is mounted on the fixed frame and is connected to the movable frame for raising or lowering the movable frame to adjust the height of the mounting plate. The movable frame also has a guide limit block, and the fixed frame has a guide limit groove. The guide limit block is slidably accommodated in the guide limit groove, which limits the guide limit block in the front-to-back direction. With the aforementioned structure, when actually attaching agricultural machinery, the attachment frame on the machinery can be attached to or bolted to the attachment holes on the attachment plate. The lifting component can raise or lower the movable frame, thereby adjusting the height of the attachment plate. This allows the attachment plate to be adapted to attachment frames of different heights, thus enabling the attachment of agricultural machinery of different specifications and types. Furthermore, by setting guide limit blocks and guide limit grooves, the movable frame and attachment plate can be limited in the front-to-back direction, providing better support when attaching agricultural machinery, preventing the movable frame from being directly pulled backward by force, and also preventing the drive cylinder from being stressed, ensuring structural stability. Compared with existing technologies, the lightweight tracked tractor provided by this invention can adaptively adjust the attachment position according to different specifications and types of agricultural machinery, thus being applicable to a variety of different specifications of agricultural machinery, with better adaptability. Moreover, the structural stability is higher, ensuring the reliability of agricultural machinery attachment. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a structural schematic diagram of a lightweight tracked tractor provided in an embodiment of the present invention from a first-view perspective;

[0020] Figure 2 This is a structural schematic diagram of a lightweight tracked tractor provided in an embodiment of the present invention from a second perspective;

[0021] Figure 3 A partial structural schematic diagram of a lightweight tracked tractor provided in an embodiment of the present invention;

[0022] Figure 4 for Figure 1 Schematic diagram of the structure of the central mounting frame;

[0023] Figure 5 for Figure 2 A schematic diagram of the structure of the middle mounting plate.

[0024] Icons: 1-Light tracked tractor; 2-Carrier chassis; 3-Drive unit; 4-Hook-on frame; 5-Fixed frame; 6-Moving frame; 7-Lifting assembly; 8-Hook-on plate; 9-Hook-on hole; 10-Guide limit block; 11-Guide limit groove; 12-Mounting groove; 13-Connecting bolt; 14-Limit gasket; 15-Limit slot; 16-Clamping tooth; 17-Serrated protrusion; 18-Auxiliary mounting hole; 19-Carrier box; 20-Power motor; 21-Conversion connector; 22-Carrier frame; 23-Carrier top plate; 24-Leaning groove; 25-Drive wheel; 26-Front wheel; 27-Rear wheel; 28-Carrier wheel; 29-Drive track; 30-Carrier side frame; 31-First battery pack; 32-Second battery pack. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0027] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0028] In the description of this invention, it should be noted that the terms "center," "upper," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0029] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," "installed," and "connected" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0030] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, features in the following embodiments can be combined with each other. Specific Implementation

[0032] See also Figures 1 to 5 This embodiment provides a lightweight tracked tractor 1, which can adaptively adjust the mounting position according to different specifications and types of agricultural machinery, thus making it suitable for a variety of different specifications of agricultural machinery and providing better adaptability. Furthermore, it has higher structural stability, ensuring the reliability of agricultural machinery mounting.

[0033] The lightweight tracked tractor 1 provided in this embodiment includes a carrier chassis 2, track drive units 3 disposed on both sides of the carrier chassis 2, and a mounting frame 4 disposed at the rear end of the carrier chassis 2. The track drive units 3 are used to drive the carrier chassis 2 to move. The mounting frame 4 includes a fixed frame 5, a movable frame 6, and a lifting assembly 7. The fixed frame 5 is fixedly disposed at the rear end of the carrier chassis 2, and the movable frame 6 is movably disposed on the top of the fixed frame 5. A mounting plate 8 is also provided on the movable frame 6, and a mounting hole 9 is provided on the mounting plate 8 for connecting external agricultural machinery. The lifting assembly 7 is disposed on the fixed frame 5 and is connected to the movable frame 6. The transmission connection is used to drive the movable frame 6 to rise or fall, so as to adjust the height of the hanging plate 8. The movable frame 6 is also provided with a guide limit block 10, and the fixed frame 5 is provided with a guide limit groove 11. The guide limit block 10 is slidably accommodated in the guide limit groove 11. The guide limit groove 11 is used to limit the guide limit block 10 in the front and rear directions.

[0034] It should be noted that in this embodiment, the mounting plate 8 is used to mount agricultural machinery, which can be various types of agricultural machinery such as seeders and rotary tillers. The agricultural machinery is adapted to have mounting frames, which can be mounted or fixed to the mounting holes 9 of the mounting plate 8 with bolts. The lifting component 7 can drive the movable frame 6 to rise or fall, thereby adjusting the height of the mounting plate 8. This allows the mounting plate 8 to be adapted to mounting frames of different heights, thus enabling the mounting of agricultural machinery of different specifications and types. Furthermore, by setting the guide limit block 10 and guide limit groove 11, the movable frame and mounting plate 8 can be limited in the front-to-back direction, providing better support when mounting agricultural machinery, preventing the movable frame 6 from being directly pulled backward by force, and also preventing the drive cylinder from being stressed, thus ensuring the stability of the structure.

[0035] In this embodiment, a mounting groove 12 is provided on the fixed frame 5. The lifting component 7 is disposed in the mounting groove 12 and fixedly connected to the fixed frame 5. The movable frame 6 is disposed at the top opening of the mounting groove 12 so that the mounting plate 8 is located at the top of the mounting groove 12. The mounting plate 8 extends backward out of the movable frame 6, and there are two mounting holes 9. The two mounting holes 9 are spaced apart on the mounting plate 8. One mounting hole 9 is located at the part of the mounting plate 8 that extends out of the movable frame 6, and the other mounting hole 9 is located at the part of the mounting plate 8 that engages with the movable frame 6 and penetrates through the movable frame 6. Specifically, the mounting plate 8 is disposed along the front-to-back direction and suspended on the movable frame 6. By providing two mounting holes 9, on the one hand, two connection points can be set on the mounting frame on the agricultural machinery, thereby further ensuring the connection and fixation effect. On the other hand, even with a single connection point, the front-to-back position can be adjusted, thereby further improving the adaptability to different agricultural machinery.

[0036] In this embodiment, the mounting hole 9 is an oblong hole, with its long axis oriented along the front-to-back direction. Limiting grooves 15 are provided on both sides of the mounting hole 9, each containing multiple locking teeth 16. A connecting bolt 13 is mounted on the mounting hole 9, used to connect the external agricultural machinery and the mounting plate 8. A limiting washer 14 is also provided on the connecting bolt 13, partially extending into the limiting groove 15 and engaging with some of the locking teeth 16 to limit the movement of the connecting bolt 13. Specifically, the oblong shape of the mounting hole 9 allows for adjustment of the position of the connecting bolt 13 in the front-to-back direction, providing single-hole adjustment.

[0037] It should be noted that both hanging holes 9 are oval in shape, and the major axis of both oval holes is along the front-back direction. The two hanging holes 9 can be set along the same straight line or staggered. Preferably, the major axis of the two hanging holes 9 is set along the same straight line to improve the adjustment range in the front-back direction.

[0038] In this embodiment, the limiting washer 14 has an inverted U-shaped cross-section, and both sides of the limiting washer 14 are provided with serrated protrusions 17 that are adapted to the locking teeth 16. The serrated protrusions 17 are used to engage with some of the locking teeth 16. Specifically, the connecting bolt 13 passes through the limiting washer 14 and through the movable frame 6. The bottom of the connecting bolt 13 is also provided with a connecting nut. Through the limiting effect of the connecting nut and the limiting washer 14, the mounting frame and the mounting plate 8 of the agricultural machinery are fixed together. The structure of the bolt connection is the same as that of conventional bolts and will not be described in detail here. Unlike conventional technology, a limiting shim 14 is provided here, and both sides of the limiting shim 14 are provided with serrated protrusions 17. When the connecting bolt 13 is loosened, the limiting shim 14 can be raised and separated from the mounting plate 8, so as to facilitate the adjustment of the position in the front and back direction. After the position is adjusted, the connecting bolt 13 is tightened, and the two sides of the limiting shim 14 extend into the limiting slot 15 respectively, so that the serrated protrusions 17 and the locking teeth 16 cooperate, thereby achieving the limitation in the front and back direction and preventing slippage under force.

[0039] In this embodiment, the fixed frame 5 is also provided with multiple auxiliary mounting holes 18. These auxiliary mounting holes 18 are also oval-shaped, and their major axes are parallel to each other. Furthermore, the major axis of each auxiliary mounting hole 18 is perpendicular to the major axis of the hook-up hole 9. Specifically, by providing the auxiliary mounting holes 18, it is convenient to install other hook-up structures on the agricultural machinery. Of course, the agricultural machinery can also be hooked up using only the auxiliary mounting holes 18. Moreover, the auxiliary mounting holes 18 are also oval-shaped and perpendicular to the hook-up hole 9, thus allowing for adjustment in the left-right direction, increasing the installation adjustment angle.

[0040] The lifting assembly 7 includes a first hydraulic cylinder and a second hydraulic cylinder. Guide limiting grooves 11 are provided on the fixed frame 5 on the opposite sidewalls of the mounting groove 12. Guide limiting blocks 10 are provided on both sides of the movable frame 6. The two guide limiting blocks 10 are slidably fitted into the two guide limiting grooves 11. The first and second hydraulic cylinders are fixed to the bottom wall of the mounting groove 12 and are respectively located close to the opposite sidewalls of the mounting groove 12. The first and second hydraulic cylinders are connected to the opposite sidewalls of the two guide limiting blocks 10 to drive the movable frame 6 to rise or fall. Specifically, by providing two hydraulic cylinders, and by having the first and second hydraulic cylinders operate synchronously, the force on the movable frame 6 can be made more even. Furthermore, the first and second hydraulic cylinders can transmit power through the two guide limiting blocks 10, avoiding direct action on the bottom of the movable frame 6. The two guide limiting blocks 10 can be limited by the two guide limiting grooves 11, preventing deviation in the front-back direction and thus avoiding the generation of torsional torque.

[0041] In this embodiment, a carrier box 19 is also provided on the carrier chassis 2. A power source motor 20 is housed within the carrier box 19 and is fixedly connected to the carrier chassis 2. The output shaft of the power source motor 20 extends rearward through the mounting groove 12. A power conversion connector 21 is also provided at the rear end of the output shaft. The power conversion connector 21 is used to adapt to the power interface on the attached agricultural machinery to provide power to the attached agricultural machinery. Specifically, the conversion connector 21 can be a linkage shaft that can be adapted to the power interface on the attached agricultural machinery to achieve power transmission. Of course, the power system of the agricultural machinery also needs to be adapted to facilitate power transmission. Here, the power source and drive power source of the attached agricultural machinery are integrated on the carrier chassis 2, resulting in a higher integration of the entire agricultural machinery system. This also increases the front weight of the tractor, achieving a counterweight balance between the tractor and the attached agricultural machinery.

[0042] The carrier box 19 includes a carrier frame 22 and a carrier top plate 23. The carrier frame 22 is fixedly connected to the carrier chassis 2. The carrier top plate 23 is located on top of the carrier frame 22. The front end of the mounting plate 8 extends forward from the movable frame. The rear end of the carrier top plate 23 has a relief groove 24 whose shape matches the front end of the mounting plate 8. The depth of the relief groove 24 matches the thickness of the mounting plate 8, so that the mounting plate 8 is accommodated in the relief groove 24 when it is at its lowest point, and the carrier top plate 23 and the mounting plate 8 are flush. Specifically, by providing the relief groove 24, the mounting plate 8 can remain flush with the carrier top plate 23 when it is lowered, thereby forming a flat carrier platform on which other transport components can be placed, facilitating the tractor's relocation.

[0043] The track drive device 3 includes a drive wheel 25, a front wheel 26, a rear wheel 27, a load-bearing wheel 28, and a drive track 29. The front wheel 26 is rotatably connected to the load-bearing base via a first load-bearing rod. Load-bearing side frames 30 are also provided on both sides of the load-bearing chassis 2. The rear wheel 27 and the load-bearing wheel 28 are rotatably mounted on the load-bearing side frames 30. The drive wheel 25 is located above the line connecting the front wheel 26 and the rear wheel 27. A drive motor is also provided on the load-bearing chassis 2. The drive motor is connected to the drive wheel 25 for driving the drive wheel 25 to rotate. The drive wheel 25 is wound around the front wheel 26, the load-bearing wheel 28, the rear wheel 27, and the drive wheel 29, and rotates under the drive of the drive wheel 25.

[0044] In this embodiment, a first battery pack 31 is disposed at the bottom of the carrier chassis 2, and the first battery pack 31 is electrically connected to the power source motor for supplying power to the power source motor; a second battery pack 32 is disposed at the front end of the carrier chassis 2, and the second battery pack 32 is connected to the drive motor for supplying power to the drive motor. Specifically, the first battery pack 31 is disposed at the bottom of the carrier chassis 2, which can increase the stability of the tractor, and the second battery pack 32 is disposed at the front end of the carrier chassis 2, which can achieve balance with the rear end structure, so that the overall center of gravity of the tractor is closer to the front, resulting in better stability.

[0045] In this embodiment, the angle between the drive track 29 between the front wheel 26 and the load-bearing wheel 28 and the ground forms an approach angle. A first adjusting seat is movably mounted on the load-bearing chassis 2, and a first load-bearing rod is rotatably mounted on the first adjusting seat. The front wheel 26 is located at the end of the first load-bearing rod. A first drive cylinder is also mounted on the load-bearing chassis 2, and the first drive cylinder is operatively connected to the first adjusting seat. The first drive cylinder is used to adjust the position of the first adjusting seat to adjust the position of the front wheel 26 relative to the load-bearing wheel 28, and thus adjust the approach angle. By adjusting the position of the first adjusting seat through the first drive cylinder, the position of the front wheel 26 can be adjusted, thereby changing the relative position of the load-bearing wheel 28 and achieving the purpose of adjusting the approach angle. The approach angle can be adaptively adjusted according to different terrain conditions, thereby greatly improving its ability to overcome obstacles and making the tractor more adaptable to terrain.

[0046] In this embodiment, there are multiple load-bearing wheels 28, and the diameter of the load-bearing wheels 28 is smaller than the diameter of the front wheel 26 and the rear wheel 27. The multiple load-bearing wheels 28 are arranged along the same horizontal straight line, so that the load-bearing wheels 28 can play the main load-bearing role.

[0047] In this embodiment, a first sliding groove is provided on the supporting chassis 2, a first adjusting seat is disposed in the first sliding groove, and a first drive cylinder is disposed on the supporting chassis 2 and is connected to the first adjusting seat for driving the first adjusting seat to slide along the first sliding groove. The first sliding groove is arranged horizontally. Specifically, the first sliding groove is oval, and the major axis of the oval shape is arranged horizontally, specifically along the front-to-back direction. The first adjusting seat is also oval, and its major axis length is less than the major axis length of the first sliding groove. The minor axis length of the first adjusting seat is adapted to the first sliding groove, so that the first adjusting seat can slide horizontally, thereby adjusting the horizontal position of the first supporting rod.

[0048] It should be noted that in this embodiment, the limiting of the first adjusting seat can be achieved by the first driving cylinder. That is, when the first driving cylinder adjusts the first adjusting seat to a suitable position, it remains stationary and plays a certain supporting role, thereby ensuring that the first adjusting seat remains fixed after being adjusted to the position, thus ensuring the supporting effect on the drive track 29.

[0049] In this embodiment, a second adjusting seat is movably mounted on the chassis 2. A drive motor is mounted on the second adjusting seat, and the output shaft of the drive motor is connected to the drive wheel 25. A second drive cylinder is also mounted on the second adjusting seat and is connected to it. The second drive cylinder is used to adjust the position of the second adjusting seat, thereby adjusting the position of the drive wheel 25 relative to the support wheel 28. Specifically, by setting up the second adjusting seat and using the second drive cylinder to adjust its position, the problem of track tension caused by the movement of the first adjusting seat is solved. The second drive cylinder and the first drive cylinder are also in a linked state. For example, when the first drive cylinder adjusts the first adjusting seat backward, the first support rod drives the front wheel 26 backward, causing the drive wheel 25 to loosen. Simultaneously, the second drive cylinder adjusts the second adjusting seat to move away from the first adjusting seat, causing the second support rod to drive the drive wheel 25 away from the front wheel 26, re-tightening the drive track 29 and preventing it from being loose, thus ensuring the normal operation of the drive track 29.

[0050] In this embodiment, a second sliding groove is provided on the top of the supporting chassis 2, and a second adjusting seat is movably disposed within the second sliding groove. A second drive cylinder is provided on the supporting chassis 2 and is connected to the second adjusting seat for driving the second adjusting seat to slide along the second sliding groove, wherein the second sliding groove is arranged vertically. Specifically, the vertical arrangement of the second sliding groove allows the second drive cylinder to adjust the vertical movement of the second adjusting seat. When the first adjusting seat is adjusted backward, the second adjusting seat simultaneously adjusts upward, thereby ensuring that the drive track 29 is always in a taut state. Of course, in other preferred embodiments of the present invention, the second sliding groove can also be arranged obliquely upward, which can also adjust the position of the drive wheel 25 via the second adjusting seat, thereby ensuring that the drive track 29 is in a taut state and ensuring its driving effect.

[0051] This embodiment provides a lightweight tracked tractor 1, in which track drive devices 3 are installed on both sides of a carrier chassis 2 for movement. A fixed frame 5 is fixed to the rear of the carrier chassis 2, and a movable frame 6 is movably installed on top of the fixed frame 5. The movable frame 6 is also provided with a mounting plate 8, which has mounting holes 9 for connecting external agricultural machinery. A lifting assembly 7 is installed on the fixed frame 5 and is connected to the movable frame 6 for driving the movable frame 6 to rise or fall, thereby adjusting the height of the mounting plate 8. The movable frame 6 is also provided with a guide limiting block 10, and the fixed frame 5 has a guide limiting groove 11. The guide limiting block 10 is slidably accommodated in the guide limiting groove 11, which limits the guide limiting block 10 in the front-to-back direction. With the aforementioned structure, when actually attaching agricultural machinery, the attachment frame on the agricultural machinery can be attached to or fixed to the attachment holes 9 of the attachment plate 8 via bolts. The lifting component 7 can drive the movable frame 6 to rise or fall, thereby adjusting the height of the attachment plate 8. This allows the attachment plate 8 to be adapted to attachment frames of different heights, thus enabling the attachment of agricultural machinery of different specifications and types. Furthermore, by setting the guide limit block 10 and guide limit groove 11, the movable frame and attachment plate 8 can be limited in the front-rear direction, providing better support when attaching agricultural machinery, preventing the movable frame 6 from being directly pulled backward by force, and also preventing the drive cylinder from being stressed, ensuring the stability of the structure. Compared with the prior art, the lightweight tracked tractor 1 provided by this invention can adaptively adjust the attachment position according to different specifications and types of agricultural machinery, thus being applicable to a variety of different specifications of agricultural machinery, with better adaptability. Moreover, the structural stability is higher, ensuring the reliability of agricultural machinery attachment.

Claims

1. A lightweight tracked tractor, characterized in that, The system includes a carrier chassis, track drive units on both sides of the carrier chassis, and a mounting frame at the rear of the carrier chassis. The track drive units drive the carrier chassis to move. The mounting frame includes a fixed frame, a movable frame, and a lifting assembly. The fixed frame is fixedly mounted at the rear of the carrier chassis, and the movable frame is movably mounted on top of the fixed frame. The movable frame also has a mounting plate with mounting holes for connecting external agricultural machinery. The lifting assembly is mounted on the fixed frame and is connected to the movable frame for driving the movable frame to rise or fall, thereby adjusting the height of the mounting plate. The movable frame also has a guide limit block, and the fixed frame has a guide limit groove. The guide limit block is slidably accommodated in the guide limit groove, which limits the guide limit block in the front-rear direction. There are two hanging holes, which are spaced apart on the hanging plate. Both hanging holes are oval, and their major axes are arranged along the front-to-back direction, and the major axes of the two hanging holes are arranged along the same straight line.

2. The light tracked tractor according to claim 1, characterized in that, The fixed frame is provided with a mounting groove, the lifting component is disposed in the mounting groove and fixedly connected to the fixed frame, and the movable frame is disposed at the top opening of the mounting groove so that the hanging plate is located at the top of the mounting groove. The hanging plate extends backward out of the movable frame, one of the hanging holes is disposed in the part of the hanging plate that extends out of the movable frame, and the other hanging hole is disposed in the part of the hanging plate that engages with the movable frame and penetrates the movable frame.

3. The light tracked tractor according to claim 2, characterized in that, Limiting slots are provided on both sides of the mounting hole, and multiple locking teeth are provided in the limiting slots. A connecting bolt is provided on the mounting hole. The connecting bolt is used to connect the external agricultural machinery and the mounting plate. A limiting washer is also provided on the connecting bolt. The limiting washer extends into the limiting slot and engages with some of the locking teeth to limit the connection bolt.

4. The light tracked tractor according to claim 3, characterized in that, The limiting pad has an inverted U-shaped cross section, and both sides of the limiting pad are provided with serrated protrusions that are adapted to the locking teeth. The serrated protrusions are used to lock with a portion of the locking teeth.

5. The light tracked tractor according to claim 3, characterized in that, The fixed frame is also provided with a plurality of auxiliary mounting holes, which are also oval holes, and the major axes of the plurality of auxiliary mounting holes are parallel to each other, and the major axis of each auxiliary mounting hole is perpendicular to the major axis of the hanging hole.

6. The light tracked tractor according to claim 2, characterized in that, The lifting assembly includes a first hydraulic cylinder and a second hydraulic cylinder. The fixed frame on the opposite sidewall of the mounting groove is provided with guide limiting grooves. The two sides of the movable frame are provided with guide limiting blocks. The two guide limiting blocks are slidably assembled in the two guide limiting grooves. The first hydraulic cylinder and the second hydraulic cylinder are fixedly connected to the bottom wall of the mounting groove and are respectively located close to the opposite sidewall of the mounting groove. The first hydraulic cylinder and the second hydraulic cylinder are respectively connected to the opposite sidewall of the two guide limiting blocks to drive the movable frame to rise or fall.

7. The light tracked tractor according to any one of claims 2-6, characterized in that, The supporting chassis is also provided with a supporting box, and a power source motor is provided inside the supporting box. The power source motor is fixed to the supporting chassis, and the output shaft of the power source motor extends rearward through the mounting groove. A power conversion connector is also provided at the rear end of the output shaft. The power conversion connector is used to adapt to the power interface on the external agricultural machinery to provide power to the external agricultural machinery.

8. The light tracked tractor according to claim 7, characterized in that, The carrier box includes a carrier frame and a carrier top plate. The carrier frame is fixedly connected to the carrier chassis. The carrier top plate is located on the top of the carrier frame. The front end of the hanging plate extends forward from the movable frame. The rear end of the carrier top plate has a relief groove whose shape matches the front end of the hanging plate. The depth of the relief groove matches the thickness of the hanging plate, so that the hanging plate is accommodated in the relief groove when it is at its lowest point, and the carrier top plate and the hanging plate are flush.

9. The light tracked tractor according to claim 7, characterized in that, The track drive device includes a drive wheel, a front wheel, a rear wheel, a load-bearing wheel, and a drive track. The front wheel is rotatably connected to the load-bearing base via a first load-bearing rod. Load-bearing side frames are also provided on both sides of the load-bearing chassis. The rear wheel and the load-bearing wheel are rotatably mounted on the load-bearing side frames. The drive wheel is located above the line connecting the front wheel and the rear wheel. A drive motor is also provided on the load-bearing chassis. The drive motor is connected to the drive wheel for driving the drive wheel to rotate. The drive wheel belt is wound around the front wheel, the load-bearing wheel, the rear wheel, and the drive wheel, and rotates under the drive of the drive wheel.

10. The lightweight tracked tractor according to claim 9, characterized in that, A first battery pack is provided at the bottom of the support chassis, and the first battery pack is electrically connected to the power source motor for supplying power to the power source motor; a second battery pack is also provided at the front end of the support chassis, and the second battery pack is connected to the drive motor for supplying power to the drive motor.

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