Adjustable chassis of agricultural equipment
By combining the height adjustment structure of the scissor fork lever arm with the sliding groove and the width adjustment screw, the problem of the inability to dynamically adjust the chassis of agricultural machinery is solved, realizing the chassis's flexible adaptability and self-cleaning function, thereby improving operating efficiency and equipment lifespan.
Patent Information
- Application Number
- CN202511987875.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-26
- Publication Date
- 2026-02-27
AI Technical Summary
The width and height of existing agricultural machinery chassis cannot be dynamically adjusted, making it unable to adapt to different ridge spacing and terrain, increasing fuel consumption and operating time. Furthermore, the adjustment structure is complex and easily clogged by mud.
The height adjustment structure adopts a combination of scissor fork lever arm and sliding groove, combined with width adjustment screw and limit rod. The height and width of the chassis can be flexibly adjusted through the height adjustment handle and width adjustment handle. The sliding groove and limit block design realizes the self-cleaning function to prevent mud and dirt from clogging.
It achieves flexible adaptability and efficient adjustment of the chassis, reduces soil compaction and crop rolling, simplifies operation, extends equipment life and reduces maintenance costs, and improves operating efficiency and portability.
Smart Images
Figure CN121569628A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of agricultural equipment technology, specifically to an adjustable chassis for agricultural equipment. Background Technology
[0002] Currently, in agricultural operations, a mismatch between chassis width and row spacing is frequently encountered. This may be due to variations in crop width or the presence of different row spacings due to site limitations. In such cases, the chassis width needs to be adjusted to match the row spacing. Furthermore, different terrains and operational requirements necessitate varying chassis heights. In southern paddy fields and low-lying areas during the rainy season, where the soil is loose and waterlogged, the chassis may need to be raised to prevent tracks / wheels from sinking into mud or chassis components from being damaged by water. Alternatively, the chassis height may need to be adjusted to match crop height, allowing the working components to be closer to the crops. All these situations require chassis height adjustment. Therefore, for agricultural machinery, a chassis with adjustable height and width is a crucial performance characteristic.
[0003] In current agricultural production scenarios, the wheel track of most agricultural vehicles is usually fixed, which means that the chassis width is also fixed. This means that the chassis cannot be dynamically adjusted according to actual needs during subsequent operations, and can only adapt to single-function, single-scenario operations. It is unsuitable for machines operating on ridges with varying spacing, easily crushing crop root zones, or requiring multiple trips due to mismatched operating widths, increasing fuel consumption and operating time. Currently, the structure for changing the chassis height usually uses threaded self-locking, typically by installing threaded structures on the wheels and adjusting the actual chassis height by continuously rotating the nuts. In actual production, this is quite cumbersome, usually requiring adjusting the spacing between the nuts on all four wheels. Summary of the Invention
[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides an adjustable chassis for agricultural equipment, which has the advantages of convenient width and height adjustment, reduced mud and dirt blockage, and solves the problem of mismatch between the chassis of agricultural equipment and the row spacing.
[0005] (II) Technical Solution To achieve the aforementioned goals of convenient width and height adjustment and reduced mud clogging, this invention provides the following technical solution: an adjustable chassis for agricultural equipment, comprising a hub frame and a chassis frame, wherein the hub frame and the chassis frame are connected by a height adjustment structure, the height adjustment structure consisting of a scissor fork arm, a sliding groove, and a chassis frame sliding block, wherein the sliding groove contains the sliding block and is disposed within the hub frame, and the chassis frame sliding block is disposed at the edge of the chassis frame, and one side of the scissor fork arm is connected to the chassis. The frame sliding block and sliding groove are hinged together, and the other side is fixed to the chassis frame and the wheel hub frame respectively through the chassis fixing frame and the wheel hub fixing frame. The sliding block and the chassis frame sliding block can be translated in the same direction, so that the clamping angle of the scissor fork lever arm changes. The chassis frame is divided into two parts in the width direction, and is provided with a width limiting rod and a width adjusting screw to connect the two parts. The width adjusting screw and the width limiting rod are sleeved with the chassis frame. The width adjusting screw can be driven to change the distance between the two parts of the chassis frame.
[0006] The sliding block is provided with a sliding block connecting end above it. One end of the scissor fork lever arm is hinged to the sliding block connecting end. The height adjustment screw is provided on both sides of the chassis frame and is perpendicular to the width adjustment screw. The chassis frame sliding block is provided on the height adjustment screw. When the height adjustment screw rotates, the chassis frame sliding block moves along the extension direction of the height adjustment screw.
[0007] The chassis frame is equipped with a height adjustment handle and a width adjustment handle on its side. The height adjustment handle and the width adjustment handle have rotating height adjustment screws and width adjustment screws.
[0008] The sliding groove is in the shape of a rectangular hollow tube, with a slot at the upper edge. The width of the slot is smaller than the overall width of the sliding block, and the width of the sliding block is smaller than the width of the slot. Limiting blocks are provided on both sides of the sliding block and inside the sliding groove. The sliding block can only move along the extension direction of the sliding groove.
[0009] The limiting block is a rectangular hollow tube that fits snugly against the inner wall of the sliding groove.
[0010] The limiting block and the sliding block are connected by an array of drain outlets, which are in the shape of a long, narrow parallelogram.
[0011] The contact side of the limiting block and the sliding block is provided with a sealing protrusion. The sealing protrusion is a horizontal protrusion and has a notch at the edge, forming a zigzag maze loop on one side of the limiting block.
[0012] The contact surface between the sliding block and the limiting block is provided with comb teeth. The comb teeth are triangular protrusions with the same height as the sealing protrusion and the tilt angle points towards the sewage outlet.
[0013] The inner wall of the limiting block is provided with a downwardly inclined sewage guide block, and the sewage guide block is positioned in the same position as the sealing protrusion.
[0014] (III) Beneficial Effects Compared with the prior art, the present invention provides an adjustable chassis for agricultural equipment, which has the following beneficial effects: 1. This agricultural equipment features an adjustable chassis with dual height and width adjustment mechanisms, significantly enhancing its adaptability and functionality. The height adjustment structure utilizes a combination of a scissor fork arm and a sliding groove, driven by a height adjustment screw. This allows for smooth and synchronous raising or lowering of the chassis frame, enabling the equipment to flexibly adapt to different crop heights, undulating terrain, or special operational needs. This ensures structural stability during lifting and lowering while avoiding the risk of deformation due to uneven stress. Simultaneously, the chassis width adjustment mechanism, through the cooperation of a screw and a limiting rod sleeve, achieves stepless adjustment of the chassis's lateral width. This allows the equipment to flexibly adjust the wheel track according to crop row spacing or operating path, effectively reducing soil compaction and crop rolling. It is particularly suitable for row-based operations such as inter-row cultivation and plant protection. Furthermore, this structure offers the advantage of easy operation. Centralized control of the height and width adjustment handles allows users to quickly complete adjustments without tools, greatly improving operational efficiency and the human-machine interface experience. More importantly, this modular adjustment design allows the chassis to be retracted when not in use, reducing the storage and transportation space for the equipment and enhancing overall portability and economy. Its rigid connection and limiting structure also ensure that it can maintain excellent overall load-bearing capacity and torsional performance after adjustment, extending the service life of the equipment and reducing maintenance requirements.
[0015] 2. This agricultural equipment features an adjustable chassis. Through its sliding groove and limiting block design, it achieves precise and stable linear movement while effectively solving the long-standing problems of jamming and wear in harsh environments such as mud, water, and weeds. The sliding groove adopts a rectangular hollow tubular design with a slotted top. The groove width is precisely calculated to allow the sliding block connection end to pass through. Together with the built-in rectangular tubular limiting block, they form an efficient and robust guide pair. This design not only ensures that the sliding block can only move smoothly in the predetermined direction without any deviation, thus minimizing lateral force and sway during height adjustment and guaranteeing the synchronization and reliability of the scissor lift system, but more importantly, it greatly simplifies the component structure and assembly process. Each component can be manufactured independently without the need for complex tooling fixtures, significantly reducing production and maintenance costs. Its innovative design is particularly noteworthy. Its dynamic anti-fouling and self-cleaning capabilities, along with the smooth shape of the sliding groove, prevent pits and dead corners from the source, effectively reducing the formation of "mud rings". When mud or grass inevitably enters the contact surface between the sliding block and the limiting block, the array of slender parallelogram drainage slots on the side of the limiting block plays a key role. No matter which direction the sliding block moves, these uniquely angled slots can use the friction and squeezing generated by the movement, like miniature scrapers and conveying channels, to continuously "scrape" the sticky mud and tangled grass into the slots. The inclined surfaces then collect and discharge the dirt towards the corners of the slots, thus preventing the accumulation and hardening of dirt on key friction surfaces. This self-cleaning mechanism effectively prevents malfunctions, increased movement resistance, or component jamming caused by blockages, greatly improving the adaptability and durability of the regulating system in wet and muddy conditions, and reducing the frequency of daily cleaning and maintenance.
[0016] 3. The adjustable chassis of this agricultural equipment, through the design of horizontal protrusions and notches, significantly extends and tortuous the path for dirt to reach the deepest part of the sliding surface. This prevents fine mud and water from penetrating directly, effectively blocking and trapping most of them within the labyrinthine channels, greatly protecting the cleanliness of the core moving parts. Simultaneously, this design cleverly reduces the actual contact area between the sliding block and the limiting block, transforming surface contact into limited line contact. This not only significantly reduces frictional resistance during movement, making height adjustment smoother and easier, but also fundamentally reduces component failure due to abrasive wear, extending service life. The comb teeth are not passive; their triangular protrusions are designed to be level with the sealing protrusions, acting as powerful scrapers on the contact surface. During sliding, the comb teeth rake and capture the trapped dirt. Because their angle is clearly pointed towards the drain opening, functionally it acts like a miniature conveyor belt installed on the moving parts, sweeping the captured dirt directionally and quickly into the adjacent... In parallelogram-shaped drain outlets, the advantage of parallelogram-shaped outlets lies in their bidirectional waste collection capability. However, they require a mechanism to efficiently collect and transport waste scattered on the plane to their "mouth". The comb structure is the ideal collector for this purpose. When the triangular contour of the comb moves relative to the waste, it generates a resultant force pointing in its inclined direction. This force drives the waste to slide along the tooth surface, just like a stream being guided to a drainage ditch. When the comb pushes the waste to the edge of the parallelogram-shaped drain outlet, the inclined side of the outlet immediately takes over the subsequent work. The acute angle formed by the inclined side and the direction of movement ensures that the waste is smoothly drawn into the interior of the outlet and gathers along the inclined side towards its acute corner. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the height adjustment structure of the present invention; Figure 2 This is a schematic diagram of the chassis frame structure of the present invention; Figure 3 This is a schematic diagram of the sliding groove structure of the present invention; Figure 4 This is a schematic diagram of the limiting block structure of the present invention. Figure 1 ; Figure 5 This is a schematic diagram of the sliding block structure of the present invention; Figure 6 This is a schematic diagram of the limiting block structure of the present invention. Figure 2 .
[0018] In the diagram: 1. Hub frame; 2. Height adjustment structure; 3. Width adjustment structure; 4. Chassis frame; 21. Sliding groove; 22. Hub fixing bracket; 23. Scissor fork lever arm; 24. Chassis fixing bracket; 31. Width limit rod; 32. Height adjustment screw; 33. Width adjustment screw; 211. Sliding block; 212. Limiting block; 231. Sliding block connecting end; 321. Height adjustment handle; 322. Chassis frame sliding block; 331. Width adjustment handle; 2111. Comb teeth; 2121. Drainage trough; 2122. Sealing protrusion; 2123. Drainage guide block. Detailed Implementation
[0019] 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. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0020] Please see Figures 1-2 The adjustable chassis of this agricultural equipment includes a hub frame 1 and a chassis frame 4. The hub frame 1 and the chassis frame 4 are connected by a height adjustment structure 2. The hub frame 1 consists of tracks, drive wheels, auxiliary wheels, and load-bearing wheels. The height adjustment structure 2 consists of a scissor fork arm 23, a sliding groove 21, and a chassis frame sliding block 322. The sliding groove 21 contains a sliding block 211 and is located in the hub frame 1. The chassis frame sliding block 322 is located at the edge of the chassis frame 4. One side of the scissor fork arm 23 is hinged to the chassis frame sliding block 322 and the sliding groove 21, and the other side is fixed to the chassis frame 4 and the hub frame 1 respectively through a chassis fixing frame 24 and a hub fixing frame 22. The sliding block 211 and the chassis frame sliding block 322 are connected by a sliding block 222. The movable block 322 can translate in the same direction, causing the angle of the scissor fork lever arm 23 to change, thereby altering the overall height of the chassis frame 4. The chassis frame 4 is divided into two parts in the width direction, and is connected to the two parts by a width limiting rod 31 and a width adjusting screw 33. The width adjusting screw 33 and the width limiting rod 31 are sleeved with the chassis frame 4. The width adjusting screw 33 can be driven to change the distance between the two parts of the chassis frame 4. For example, if the height adjusting screw 32 and the width adjusting screw 33 adopt a threaded screw structure, they can be rotated to extend outward from the chassis frame 4, increasing the distance between the two parts of the chassis frame 4. At the same time, the width limiting rod 31 is set in the other part of the chassis frame 4, and when the distance increases, it extends outward from the chassis frame 4.
[0021] The sliding block 211 is provided with a sliding block connecting end 231 above it. One end of the scissor fork lever arm 23 is hinged to the sliding block connecting end 231. The height adjustment screw 32 is provided on both sides of the chassis frame 4 and is perpendicular to the width adjustment screw 33. The chassis frame sliding block 322 is provided on the height adjustment screw 32 through an internal thread structure. When the height adjustment screw 32 rotates, the chassis frame sliding block 322 translates along the extension direction of the height adjustment screw 32. At the same time, because the chassis frame sliding block 322 drives the scissor fork lever arm 23 to move, the sliding block 211 in the sliding groove 21 is also pulled by the scissor fork lever arm 23, causing it to move in the same direction as the chassis frame sliding block 322. The chassis frame 4 is provided with a height adjustment handle 321 and a width adjustment handle 331 on its side. The height adjustment handle 321 and the width adjustment handle 331 control the rotation of the height adjustment screw 32 and the width adjustment screw 33, respectively. When the chassis height needs to be adjusted, the height adjustment handle 321 is rotated to drive the height adjustment screw 32 to rotate, and the chassis frame sliding block 322 moves, changing the angle of the scissor fork lever arm 23. Because the scissor fork lever arm 23 is hinged in the middle, the sliding block 211 at the other end will also move, ensuring synchronization with the chassis frame sliding block 322, so that the chassis height rises. When the chassis width needs to be adjusted, the width adjustment handle 331 is rotated to make the width adjustment screw 33 rotate and rotate outward from one side of the chassis frame 4, so that the distance between the two parts of the chassis frame 4 increases. The width limit rod 31 extends in cooperation with it to increase the overall chassis width and ensure strength.
[0022] See Figures 3-4The sliding groove 21 is generally rectangular hollow tube in shape, with a slot at its upper edge. The width of the slot is smaller than the overall width of the sliding block 211, and the width of the sliding block 211 is smaller than the width of the slot. Limiting blocks 212 are provided on both sides of the sliding block 211 and within the sliding groove 21. The limiting blocks 212 restrict the movement path of the sliding block 211, allowing it to move only along the extension direction of the sliding groove 21. The limiting blocks 212 are rectangular hollow tubes that fit snugly against the inner wall of the sliding groove 21. The overall structure is simpler, and each component can be individually manufactured. There are no excessive fitting requirements during installation, greatly reducing installation difficulty. Furthermore, the shape of the sliding groove 21 reduces the formation of mud rings. On the side of the limiting block 212 that contacts the sliding block 211, there are arrayed drainage outlets 2121. These drainage outlets 2121 are elongated parallelograms. When mud or grass clippings from the field enter the contact surface... Under friction and compression, the dirt will pass through the drain opening 2121 and be concentrated in the limiting block 212. At the same time, the slender parallelogram-shaped slot will gather the dirt in the slot towards the corner, no matter which direction the sliding block 211 moves. The design of the parallelogram's hypotenuse ensures that no matter whether the sliding block moves forward or backward, its edge can always form an acute angle with the dirt, achieving continuous and efficient scraping and guiding, realizing true "two-way cleaning". When the sliding block 211 moves, the dirt on its surface in contact with the limiting block is subjected to a major frictional force. When this force acts on the hypotenuse of the parallelogram slot, it will decompose into a normal force perpendicular to the hypotenuse and a tangential force parallel to the hypotenuse. The normal force will press the dirt tightly and "wedge" it into the slot, while the tangential force will push the dirt towards the acute corner of the slot along the direction of the hypotenuse. At the same time, the slender slot shape and narrow opening create a constrained space for the dirt. When the dirt enters this space guided by the inclined side, it is subjected to intense compression. This compression, on the one hand, destroys the original structure of the dirt and reduces its stickiness, making it easier to collect.
[0023] See Figures 3-6The limiting block 212 has a sealing protrusion 2122 on the contact surface with the sliding block 211. The sealing protrusion 2122 is a horizontal protrusion with a notch at the edge, forming a zigzag maze loop on one side of the limiting block 212. This prevents mud and sludge from directly entering the bottom when they are on the contact surface between the limiting block 212 and the sliding block 211. At the same time, it reduces the contact area and reduces friction. The contact surface between the sliding block 211 and the limiting block 212 has comb teeth 2111. The comb teeth 2111 are triangular protrusions with the same height as the sealing protrusion 2122 and an inclination angle pointing towards the drain outlet 2121. This design allows the mud and dirt remaining on the contact surface to be quickly carried by the comb teeth 2111 into the drain outlet 2121. Furthermore, the structure of the comb teeth 2111 is similar to that of the parallelogram-shaped outlet. The inner wall of the limiting block 212 is provided with a downwardly inclined drain guide block 2123. The drain guide block 2123 is positioned in the same position as the sealing protrusion 2122, providing an ideal slide for the dirt falling from the drain outlet 2121. This design ensures that the dirt successfully captured and discharged by the system can slide smoothly to the bottom of the limiting block or the outside under the action of gravity, rather than accumulating in the inner cavity of the limiting block, causing secondary pollution or blockage.
[0024] Working Principle: The hub frame 1 and chassis frame 4 are connected by a height adjustment structure 2. The hub frame 1 consists of tracks, drive wheels, auxiliary wheels, and load-bearing wheels. The height adjustment structure 2 consists of a scissor fork arm 23, a sliding groove 21, and a chassis frame sliding block 322. The sliding groove 21 contains a sliding block 211 and is located within the hub frame 1. The chassis frame sliding block 322 is located at the edge of the chassis frame 4. One side of the scissor fork arm 23 is hinged to the chassis frame sliding block 322 and the sliding groove 21, while the other side is fixed to the chassis frame 4 and the hub frame 1 respectively via a chassis fixing frame 24 and a hub fixing frame 22. The sliding block 211 and the chassis frame sliding block 322 can move in the same direction, allowing the scissor fork arm 23 to move in the same direction. The angle of the fork lever arm 23 changes, altering the overall height of the chassis frame 4. The chassis frame 4 is divided into two parts in the width direction, connected by a width limiting rod 31 and a width adjusting screw 33. The width adjusting screw 33 and the width limiting rod 31 form a sleeve structure with the chassis frame 4. The width adjusting screw 33 can be driven to change the distance between the two parts of the chassis frame 4. For example, the height adjusting screw 32 and the width adjusting screw 33 adopt a threaded screw structure, which, through rotation, extends outward from the chassis frame 4, increasing the distance between the two parts of the chassis frame 4. Simultaneously, the width limiting rod 31 is located in the other part of the chassis frame 4; when the distance increases, it extends outward from the chassis frame 4. The sliding block 21... A sliding block connecting end 231 is provided above the chassis frame 4. One end of the scissor fork lever arm 23 is hinged to the sliding block connecting end 231. The height adjusting screw 32 is provided on both sides of the chassis frame 4 and is perpendicular to the width adjusting screw 33. The chassis frame sliding block 322 is provided on the height adjusting screw 32 through an internal thread structure. When the height adjusting screw 32 rotates, the chassis frame sliding block 322 moves along the extension direction of the height adjusting screw 32. At the same time, because the chassis frame sliding block 322 drives the scissor fork lever arm 23 to move, the sliding block 211 in the sliding groove 21 is also pulled by the scissor fork lever arm 23, causing it to move in the same direction as the chassis frame sliding block 322. The chassis frame 4 is provided with a height adjusting handle 321 and a width adjusting handle 322 on its side. The height adjustment handle 321 and width adjustment handle 331 control the rotation of the height adjustment screw 32 and width adjustment screw 33, respectively. When the chassis height needs to be adjusted, rotating the height adjustment handle 321 causes the height adjustment screw 32 to rotate, moving the chassis frame sliding block 322 and changing the angle of the scissor fork lever arm 23. Because the scissor fork lever arm 23 is hinged in the middle, the sliding block 211 at the other end also moves, ensuring synchronization with the chassis frame sliding block 322, thus raising the chassis height. When the chassis width needs to be adjusted, rotating the width adjustment handle 331 causes the width adjustment screw 33 to rotate and rotate outward from one side of the chassis frame 4, increasing the distance between the two parts of the chassis frame 4.The width limiting rod 31 extends in conjunction with the chassis to increase the overall chassis width and ensure strength.
[0025] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0026] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. An adjustable chassis for agricultural equipment, comprising a hub frame (1) and a chassis frame (4), wherein the hub frame (1) and the chassis frame (4) are connected by a height adjustment structure (2), characterized in that: The height adjustment structure (2) consists of a scissor fork arm (23), a sliding groove (21), and a chassis frame sliding block (322). The sliding groove (21) contains a sliding block (211), and the sliding groove (21) is located in the hub frame (1). The chassis frame sliding block (322) is located at the edge of the chassis frame (4). One side of the scissor fork arm (23) is hinged to the chassis frame sliding block (322) and the sliding block (211), and the other side is connected to the chassis frame (4) via the chassis fixing frame (24) and the hub fixing frame (22). 4) Fixed to the hub frame (1), the sliding block (211) and the chassis frame sliding block (322) can be translated in the same direction, so that the angle of the scissor fork lever arm (23) changes. The chassis frame (4) is divided into two parts in the width direction, and is provided with a width limiting rod (31) and a width adjusting screw (33) to connect the two parts. The width adjusting screw (33) and the width limiting rod (31) are sleeve structures with the chassis frame (4). The width adjusting screw (33) can be driven to change the distance between the two parts of the chassis frame (4).
2. The adjustable chassis for agricultural equipment according to claim 1, characterized in that: The sliding block (211) is provided with a sliding block connecting end (231) above it. One end of the scissor fork lever (23) is hinged to the sliding block connecting end (231). The chassis frame (4) is provided with height adjustment screws (32) on both sides, which are perpendicular to the width adjustment screws (33). The chassis frame sliding block (322) is set on the height adjustment screws (32). The height adjustment screws (32) and the width adjustment screws (33) adopt a threaded screw structure. When the height adjustment screws (32) rotate, the chassis frame sliding block (322) translates along the extension direction of the height adjustment screws (32).
3. The adjustable chassis for agricultural equipment according to claim 2, characterized in that: The chassis frame (4) is provided with a height adjustment handle (321) and a width adjustment handle (331) on its side. The height adjustment handle (321) and the width adjustment handle (331) control the rotation of the height adjustment screw (32) and the width adjustment screw (33), respectively.
4. The adjustable chassis for agricultural equipment according to claim 2, characterized in that: The sliding groove (21) is in the shape of a rectangular hollow tube, and has a slot at the upper edge. The width of the slot is smaller than the overall width of the sliding block (211). The width of the sliding block (211) is smaller than the width of the slot. Limiting blocks (212) are provided on both sides of the sliding block (211) and inside the sliding groove (21). The sliding block (211) can only move along the extension direction of the sliding groove (21).
5. The adjustable chassis for agricultural equipment according to claim 4, characterized in that: The limiting block (212) is a rectangular hollow tube, which fits in place with the inner wall of the sliding groove (21).
6. The adjustable chassis for agricultural equipment according to claim 5, characterized in that: The limiting block (212) has a drain outlet (2121) arranged on the side that contacts the sliding block (211), and the drain outlet (2121) is in the shape of a long parallelogram.
7. An adjustable chassis for agricultural equipment according to claim 6, characterized in that: The limiting block (212) has a sealing protrusion (2122) on the side that contacts the sliding block (211). The sealing protrusion (2122) is a horizontal protrusion with a notch at the edge, forming a zigzag maze loop on one side of the limiting block (212).
8. The adjustable chassis for agricultural equipment according to claim 7, characterized in that: The sliding block (211) and the limiting block (212) have comb teeth (2111) on their contact surfaces. The comb teeth (2111) are triangular protrusions with the same height as the sealing protrusion (2122) and the tilt angle points towards the drain outlet (2121).
9. An adjustable chassis for agricultural equipment according to claim 8, characterized in that: The inner wall of the limiting block (212) is provided with a downwardly inclined sewage guide block (2123), and the sewage guide block (2123) is positioned in the same position as the sealing protrusion (2122).