Chassis structure of tracked tractor

Abstract

This utility model relates to the field of agricultural machinery technology, and provides a chassis structure for a tracked tractor, including a frame and a transmission assembly. The frame supports the transmission assembly. The transmission assembly has a fixed support component and an adjustable support component. The fixed support component includes a left front engine support and a right front engine support located at the front of the frame, and a rear gearbox support located at the rear of the frame. The adjustable support component includes a left half-shaft support and a right half-shaft support located at the rear of the frame, and a middle support component located in the middle. The transmission assembly is connected to the frame through the fixed support component and the adjustable support component. This design solves the problems of tracked tractors being large, heavy, and inconvenient for use in hilly and mountainous areas.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery technology, and in particular to a chassis structure for a tracked tractor. Background Technology

[0002] In my country's vast hilly and mountainous regions, agricultural production faces unique challenges due to natural conditions. The land in these areas is generally characterized by small size, irregular shape, and significant slopes. The terraced paddy fields, in particular, place extremely stringent demands on the overall structural design of tractors. Specifically, tractors need a compact structure to achieve a small and lightweight form, while ensuring sufficient strength reserves to withstand the mechanical stresses brought about by complex terrain. In terms of weight control, minimizing the operating weight effectively reduces ground pressure, enabling tractors to carry out various agricultural operations efficiently, stably, and flexibly in hilly and mountainous farmland. This ensures operational quality while improving agricultural productivity, meeting the actual needs of agricultural development in my country's hilly and mountainous areas. Utility Model Content

[0003] The purpose of this utility model is to provide a chassis structure for a tracked tractor, so as to solve the key problems of current tracked tractors being large, not lightweight, heavy, and inconvenient for use in hilly and mountainous areas.

[0004] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows:

[0005] This utility model provides a chassis structure for a tracked tractor. The chassis structure includes a frame and a transmission assembly. The frame supports the transmission assembly. The transmission assembly has a fixed support assembly and an adjustable support assembly. The fixed support assembly includes a left front engine support and a right front engine support located at the front of the frame, and a rear gearbox support located at the rear of the frame. The adjustable support assembly includes a left half-shaft support and a right half-shaft support located at the rear of the frame, and a middle support assembly located in the middle. The transmission assembly is connected to the frame through the fixed support assembly and the adjustable support assembly.

[0006] Furthermore, the left half-shaft support and the right half-shaft support have the same structure, both including a sleeve support, a half-shaft sleeve, and a fixed seat. The sleeve support is welded to the half-shaft sleeve, and the fixed seat is welded to the frame. The bottom of the fixed seat is provided with a first locking screw hole, and a bolt is provided in the first locking screw hole. The fixed seat and the half-shaft sleeve are connected by bolts.

[0007] Furthermore, the bottom of the fixing base is provided with two support screw holes, and support screws are provided in the two support screw holes. The first locking screw hole is located between the two support screw holes.

[0008] Furthermore, the fixed base is provided with second locking screw holes on both the left and right sides, and locking bolts are provided in the second locking screw holes. The fixed base and the half shaft sleeve are connected by bolts.

[0009] Furthermore, the intermediate support assembly includes an intermediate fixed plate and an intermediate movable plate. The intermediate fixed plate is welded to the frame, and the intermediate movable plate is disposed between the intermediate support fixed plate and the transmission assembly. The intermediate fixed plate, the intermediate movable plate, and the gearbox assembly of the transmission assembly are connected by bolts.

[0010] Furthermore, the intermediate fixed plate and the intermediate movable plate are provided with locking screw holes, and bolts are provided in the locking screw holes. The fixed seat is connected to the half shaft sleeve by bolts.

[0011] Furthermore, the intermediate fixed plate and the intermediate movable plate are provided with a fourth locking screw hole and a fifth locking screw hole, and bolts are provided in the fourth locking screw hole and the fifth locking screw hole. The fixed seat is connected to the half shaft sleeve by bolts.

[0012] Furthermore, both the intermediate fixed plate and the intermediate movable plate are provided with second support screw holes, and bolts are provided in the second support screw holes. The intermediate fixed plate, the intermediate movable plate and the gearbox assembly are connected by bolts.

[0013] Furthermore, the number of the second support screw holes is two.

[0014] Furthermore, the bottom surface of the intermediate movable plate is provided with a countersunk hole, and the screw passes through the intermediate fixed plate and is locked in the countersunk hole.

[0015] Based on the above technical solutions, the technical effects achievable by this utility model can be analyzed as follows:

[0016] This invention organically integrates the drivetrain of a tracked tractor with its frame, employing a connection method of 3 fixed supports and 3 adjustable fixed supports to form an integral chassis structure. The weight of the drivetrain is transferred to the frame via 6 supports, and all other components of the tractor are directly connected to the frame, with their weight directly transmitted to the frame. This highly integrated design makes the tractor more compact in its spatial layout, enhances the synergy between components, effectively utilizes limited mountainous operating space, meets the operational needs of small, irregular fields in hilly and mountainous areas, improves land utilization, and facilitates the tractor's flexible and maneuverable completion of agricultural production tasks in narrow terrain.

[0017] Furthermore, the transmission assembly and frame are tightly connected by three fixed supports and three adjustable fixed supports, forming a stable support system. This six-point support layout evenly distributes various loads generated by the transmission assembly and other machine components, such as engine vibration, transmission torque, operating resistance, and the component of the tractor's own weight on slopes. As the main load-bearing component, the frame has a reasonable stress distribution, reducing the likelihood of localized stress concentration leading to deformation or breakage. This enhances the strength reserve of the integrated chassis structure, extends the tractor's service life, reduces maintenance costs and operational interruptions due to structural failure, ensures stable operation in high-intensity mountainous environments, and guarantees the continuity and efficiency of agricultural production.

[0018] Furthermore, the integrated chassis structure and clearly defined support layout improve the assembly process. During assembly, the three fixed supports are assembled first to establish a stable benchmark, and then the left half-shaft support, right half-shaft support, and intermediate support assembly are assembled sequentially. This step-by-step assembly method is clear and orderly, facilitating precise control of assembly accuracy, improving assembly efficiency, reducing assembly errors, and ensuring the quality of tractor assembly. In terms of maintenance, due to the organic integration of the transmission assembly and the direct connection of other components to the frame, the positions of each component are relatively fixed and easy to locate. Workers can quickly and easily access important components such as the engine, gearbox, and left and right half-shafts for inspection, repair, or replacement. At the same time, the adjustable support components facilitate subsequent adjustments, reducing maintenance time and difficulty, and ensuring the normal use and efficient operation of the mountain tractor.

[0019] In summary, the chassis structure of this tracked tractor has been optimized and upgraded in multiple dimensions, including structural compactness, terrain adaptability, strength and reliability, power transmission efficiency, and ease of assembly and maintenance. It closely meets the special needs of agricultural production in hilly and mountainous areas of my country, has significant practical value and innovative significance, and helps to promote the development of mountain agricultural mechanization towards high efficiency, stability, and reliability. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 A left front structural diagram of the chassis of a mountain lightweight tracked tractor provided for an embodiment of this utility model.

[0022] Figure 2 This is a front right structural diagram of the chassis of a mountain-mountain lightweight tracked tractor provided in an embodiment of this utility model.

[0023] Figure 3 A top-view structural diagram of the chassis of a lightweight tracked tractor for mountain terrain provided in an embodiment of this utility model.

[0024] Figure 4 A top-view structural diagram of the chassis of a lightweight tracked tractor for mountainous terrain provided in an embodiment of this utility model.

[0025] Figure 5 This is a schematic diagram of one angle of the left and right half-shaft support structure of the mountain lightweight tracked tractor provided in this embodiment of the utility model.

[0026] Figure 6 This is a schematic diagram of another angle of the left and right half-shaft support structure of the mountain lightweight tracked tractor provided in this embodiment of the utility model.

[0027] Figure 7 A structural diagram of the intermediate support assembly of a mountain lightweight tracked tractor provided in an embodiment of this utility model.

[0028] Figure 8 for Figure 7 A magnified view of a section at point I.

[0029] Figure 9 This is a structural diagram of the intermediate support assembly plate of a mountain lightweight tracked tractor provided in an embodiment of the present utility model.

[0030] Figure 10 for Figure 9 Cross-sectional view at point AA.

[0031] icon:

[0032] 1-Transmission assembly; 2-Frame; 3-Left front engine support; 4-Right front engine support; 5-Right half-shaft support; 6-Left half-shaft support; 7-Rear gearbox support; 8-Intermediate support assembly;

[0033] 101-Sleeve support; 102-Half-shaft sleeve; 103-Fixed seat; 104-First support screw; 105-First locking bolt; 106-Second support screw; 107-First nut; 108-Second locking bolt; 109-Third locking bolt;

[0034] 201 - Third support screw; 202 - Fourth locking bolt; 203 - Second nut; 204 - Gearbox assembly; 205 - Intermediate movable plate; 2051 - Fourth locking screw hole; 2052 - Countersunk hole; 206 - Intermediate fixed plate; 207 - Fifth locking bolt; 208 - Fourth support screw. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present 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 present invention without inventive effort are within the scope of protection of the present invention.

[0037] 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.

[0038] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "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 utility model is in use. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0039] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0040] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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 utility model based on the specific circumstances.

[0041] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0042] See Figures 1 to 10 This utility model provides a chassis structure for a tracked tractor. The chassis structure of the tracked tractor includes a frame 2 and a transmission assembly 1. The frame 2 is used to support the transmission assembly 1. The transmission assembly 1 has a fixed support component and an adjustable support component. The fixed support component includes a left front engine support 3 and a right front engine support 4 located in front of the frame 2, and a rear gearbox support 7 located behind the frame 2. The adjustable support component includes a left half-shaft support 6 and a right half-shaft support 5 located behind the frame 2, and an intermediate support component 8 located in the middle. The transmission assembly 1 is connected to the frame 2 through the fixed support component and the adjustable support component.

[0043] This invention organically integrates the transmission assembly 1 and frame 2 of a tracked tractor, employing a connection method of 3 fixed supports and 3 adjustable fixed supports to form an integral chassis structure. The weight of the transmission assembly 1 is transferred to the frame 2 via 6 supports, and all other components of the tractor are directly connected to the frame 2, with their weight directly transmitted to the frame 2. This highly integrated design makes the tractor more compact in its spatial layout, enhances the synergy between components, effectively utilizes limited mountainous operating space, meets the operational needs of small, irregular fields in hilly and mountainous areas, improves land utilization, and facilitates the tractor's flexible and mobile completion of agricultural production tasks in narrow terrain.

[0044] The transmission assembly 1 and frame 2 are tightly connected by three fixed supports and three adjustable fixed supports, forming a stable support system. The layout of the six supports can evenly distribute various loads generated by the transmission assembly 1 and other components of the machine, such as engine vibration, transmission torque, operating resistance, and the component of its own weight on slopes. As the main load-bearing component, frame 2 has a reasonable stress distribution, making it less prone to local stress concentration that could lead to deformation or breakage. This enhances the strength reserve of the integral chassis structure, extends the service life of the tractor, reduces maintenance costs and operational interruption risks due to structural failure, ensures stable operation in high-intensity mountainous environments, and guarantees the continuity and efficiency of agricultural production.

[0045] The integrated chassis structure and clearly defined support layout improve the assembly process. During assembly, the three fixed supports are assembled first to establish a stable benchmark. Then, the left half-shaft support 6, right half-shaft support 5, and intermediate support assembly 8 are assembled sequentially to complete the assembly of the adjustable supports. This step-by-step assembly method is clear and orderly, facilitating precise control of assembly accuracy, improving assembly efficiency, reducing assembly errors, and ensuring the quality of tractor assembly. Regarding maintenance, the organic integration of the transmission assembly 1 and the frame 2, with all other components directly connected to the frame 2, ensures that the positions of each component are relatively fixed and easy to locate. Workers can quickly and easily access important components such as the engine, gearbox, and left and right half-shafts for inspection, repair, or replacement. Simultaneously, the adjustable support assembly facilitates subsequent adjustments, reducing maintenance time and difficulty, and ensuring the normal use and efficient operation of the mountain tractor.

[0046] In summary, the chassis structure of this tracked tractor has been optimized and upgraded in multiple dimensions, including structural compactness, terrain adaptability, strength and reliability, power transmission efficiency, and ease of assembly and maintenance. It closely meets the special needs of agricultural production in hilly and mountainous areas of my country, has significant practical value and innovative significance, and helps to promote the development of mountain agricultural mechanization towards high efficiency, stability, and reliability.

[0047] In some embodiments, the left half-shaft support 6 and the right half-shaft support 5 have the same structure. Both the left half-shaft support 6 and the right half-shaft support 5 include a sleeve support 101, a half-shaft sleeve 102, and a fixing seat 103. The sleeve support 101 is welded to the half-shaft sleeve 102, and the fixing seat 103 is welded to the frame 2. The bottom of the fixing seat 103 is provided with a first locking screw hole, and a bolt is provided in the first locking screw hole. The fixing seat 103 and the half-shaft sleeve 102 are connected by bolts. This symmetrical and reasonable structural design allows the left and right half-shaft supports 5 to be evenly distributed when subjected to force, avoiding deformation or damage caused by uneven force due to structural asymmetry. This improves the stability and reliability of the entire transmission system and ensures that the left and right half-shafts can stably transmit power when the tractor is operating in complex mountainous terrain.

[0048] Furthermore, the fixed seat 103 is connected to the half-shaft sleeve 102 by bolts, and the bottom of the fixed seat 103 is provided with a first locking screw hole, and a first locking bolt 105 is provided in the first locking screw hole. This bolt connection method can provide sufficient connection strength to ensure that the half-shaft sleeve 102 will not loosen or fall off when transmitting torque and bearing load, thus ensuring the connection stability of the half-shaft support during long-term, high-intensity mountain operations of the tractor and reducing the risk of failure due to connection failure.

[0049] Furthermore, the bolted connection allows for easy disassembly and reinstallation of the half-shaft support if adjustments or repairs are needed during subsequent use. For example, when the half-shaft sleeve 102 becomes worn or damaged, the corresponding component can be replaced simply by unscrewing the bolts, without needing to replace the entire half-shaft support. This reduces maintenance costs and time, and improves the maintainability of the equipment.

[0050] Preferably, the left half-shaft support 6 and the right half-shaft support 5 have the same structure, which provides good versatility. This allows the use of the same parts and manufacturing processes during production, reducing production costs and parts management costs, and improving production efficiency. At the same time, it also makes it easy and quick to find the corresponding parts during maintenance and replacement, reducing the complexity and time cost of maintenance.

[0051] In some embodiments, the bottom of the fixing base 103 is provided with two support screw holes, and the first locking screw hole is disposed between the two support screw holes. This arrangement of placing the first locking screw hole between the two support screw holes effectively increases the connection stability between the half-shaft sleeve 102 and the fixing base 103. The two support screw holes are symmetrically distributed on both sides of the first locking screw hole, and the first support screw 104 and the second support screw 106 are disposed within the two support screw holes. This ensures that when the half-shaft sleeve 102 is subjected to force, the force can be evenly transmitted to the fixing base 103 through the support screws and locking bolts, avoiding deformation or damage to the connection parts due to excessive local force, and improving the reliability and stability of the entire half-shaft support structure. Providing two support screw holes at the bottom of the fixing base 103, with the first locking screw hole placed in the middle, allows for a more balanced force distribution at each connection point when the half-shaft sleeve 102 transmits torque and bears loads. When the tractor is operating in mountainous terrain, the complex forces on the half-shaft sleeve 102 can form a stable force triangle along the support screw, locking bolt and fixing seat 103. The interaction forces between the components can be better distributed on the entire support structure, thereby enhancing the tractor's load-bearing capacity and operational stability.

[0052] Furthermore, the layout of two support screw holes and a centrally located first locking screw hole provides a more precise positioning and fixing method for assembly. During assembly, the two support screws are tightened first and locked with the first nut 107, followed by tightening the central locking bolt. This sequence and layout ensure a tight fit between the half-shaft sleeve 102 and the fixed seat 103, improving assembly accuracy. Simultaneously, the multi-point connection method enhances the connection strength, ensuring that the half-shaft support will not loosen or fail during prolonged use, thus improving the tractor's safety and reliability.

[0053] Furthermore, this symmetrical layout makes adjustment and maintenance of the half-shaft supports on both sides more convenient. If the connecting parts on one side become loose or weary, maintenance personnel can quickly locate the corresponding parts for adjustment or replacement based on the symmetrical structural features. At the same time, the symmetrical structure also helps maintain overall balance during assembly, improving assembly efficiency and ease of maintenance.

[0054] Meanwhile, placing the first locking screw hole between the two support screw holes optimizes the force transmission path. When the half-shaft sleeve 102 is subjected to torque from the transmission system or reaction force from the wheel, these forces can be effectively transmitted to the frame 2 through the support screw and locking bolt, avoiding local concentration of force during transmission, reducing the fatigue risk of the structure, and improving the service life of the half-shaft support.

[0055] In some embodiments, the fixing seat 103 has second locking screw holes on both its left and right sides, and bolts are installed in the second locking screw holes. The fixing seat 103 and the half-shaft sleeve 102 are connected by a second locking bolt 108 and a third locking bolt 109. The fact that the fixing seat 103 has second locking screw holes on both its left and right sides and is connected to the half-shaft sleeve 102 by bolts significantly enhances the connection stability between the half-shaft sleeve 102 and the fixing seat 103. In the complex mountainous operating environment of a tractor, the half-shaft needs to withstand forces and torques from different directions. The locking screw holes on both sides make the connection more secure, effectively preventing the half-shaft sleeve 102 from loosening or shifting during operation, ensuring the reliability and stability of the transmission system.

[0056] Furthermore, the second locking screw holes on both sides form a symmetrical connection structure with the fixed seat 103 and the half-shaft sleeve 102, allowing the half-shaft sleeve 102 to transmit force more evenly to the fixed seat 103 when under stress. This avoids structural deformation or damage caused by unilateral or uneven stress, improves the load-bearing capacity and service life of the entire half-shaft support structure, and ensures stable operation of the tractor on rough mountain roads.

[0057] Furthermore, the second locking screw holes on both sides provide more precise positioning and fixing points for assembly. During assembly, the bolts tightly connect the half-shaft sleeve 102 to the fixed seat 103 through the locking screw holes on both sides, ensuring the coaxiality and fitting accuracy between the two. This precise assembly method helps improve the operating efficiency of the transmission system, reduces vibration and noise caused by assembly errors, and enhances the overall performance and reliability of the tractor.

[0058] Meanwhile, the multi-point connection structure can effectively disperse stress and reduce stress concentration at individual connection points. During long-term tractor operation, the half-shaft support is subjected to repeated loads. The second locking bolt holes on both sides disperse stress, reducing the risk of structural failure due to fatigue, extending the service life of the half-shaft support, and ensuring that the tractor maintains good performance in frequent mountain operations.

[0059] Specifically, during assembly, first tighten the support screws and lock them with nuts, then tighten the bottom locking bolts, and finally tighten the locking bolts on both sides separately. This step-by-step tightening assembly method ensures that the various components of the half-shaft support are gradually and stably connected together during the assembly process, avoiding stress concentration or component damage that may occur from tightening all bolts at once. This improves assembly accuracy and efficiency, and also contributes to the accuracy and reliability of the assembly, ensuring the stable installation of the half-shaft support.

[0060] When tracked tractors operate in mountainous terrain, the axle ends bear enormous torque and reaction forces from the complex terrain. Through a rational structural design, the left and right axle supports 5 effectively transfer the forces at the axle ends to the frame 2. This force transfer mechanism reduces the load on the axles themselves, thus decreasing their mass. Reducing the material usage of the axles while meeting load-bearing and transmission requirements contributes to the lightweight design of the tractor, improving its maneuverability and flexibility in hilly and mountainous areas.

[0061] Distributing the force on the half-shafts across the frame 2 avoids excessive stress at the half-shaft ends due to concentrated force. This helps improve the strength of the left and right half-shafts and reduces the risk of fatigue damage during prolonged, high-intensity operation. With the support of the left and right half-shaft supports 5, the half-shafts can operate in a more stable stress environment, enhancing their reliability and service life, and ensuring the tractor's power transmission efficiency and operational stability in complex mountainous terrain.

[0062] The left and right half-shaft supports 5 transfer the force from the half-shafts to the frame 2, making the force distribution across the entire tractor more even and optimizing the overall structural strength distribution. As the main load-bearing component, the frame 2 better integrates and disperses the force from the half-shafts, avoiding structural damage caused by localized stress concentration. This integrated force-bearing design improves the tractor's structural rigidity, enhances its ability to operate on rugged mountainous terrain and its resistance to deformation, ensuring stable operation of the tractor in complex environments.

[0063] Because the left and right half-shaft supports effectively reduce the stress on the half-shafts, the possibility of damage due to overload is reduced. This not only lowers the frequency and cost of half-shaft maintenance but also reduces tractor downtime caused by half-shaft failures. In mountainous agricultural operations, equipment reliability is crucial, and this design significantly improves tractor availability and operational efficiency, providing farmers with more reliable production tools.

[0064] In some embodiments, the intermediate support assembly 8 includes an intermediate fixed plate 206 and an intermediate movable plate 205. The intermediate fixed plate 206 is welded to the frame 2, and the intermediate movable plate 205 is disposed between the intermediate support fixed plate and the transmission assembly 1. The intermediate fixed plate 206, the intermediate movable plate 205 and the gearbox assembly 204 of the transmission assembly 1 are connected by bolts.

[0065] The intermediate fixed plate 206 is welded to the frame 2, forming a stable supporting foundation. The intermediate movable plate 205 is located between the intermediate fixed plate 206 and the transmission assembly 1, and the three are connected by bolts. This multi-layer connection structure significantly enhances the connection stability between the transmission assembly 1 and the frame 2. In the complex mountainous operating environment of the tractor, the transmission assembly 1 needs to withstand various loads and vibrations. This structure can effectively prevent the transmission assembly 1 from shifting or loosening during operation, ensuring the reliability and stability of the transmission system.

[0066] The combined use of the intermediate fixed plate 206 and the intermediate movable plate 205 allows the weight and force of the transmission assembly 1 to be transmitted more evenly to the frame 2. The bolted connection allows it to withstand greater torque and axial force, improving the load-bearing capacity of the entire transmission system. During heavy-duty operations such as plowing and transporting, this structure effectively reduces the risk of fatigue damage to the transmission assembly 1 and extends its service life.

[0067] The bolted connection method allows for easy disassembly and replacement of components in the intermediate support assembly 8 or transmission assembly 1 during maintenance and repair. If the intermediate movable plate 205 or the fixed plate is worn or damaged, maintenance personnel can simply loosen the bolts for replacement without disassembling the entire transmission system. This maintenance-friendly design reduces maintenance costs and downtime, improving the tractor's maintainability and availability.

[0068] By distributing the force on the transmission assembly 1 to the intermediate fixed plate 206 and the movable plate before transmitting it to the frame 2, this structure optimizes stress distribution. It avoids stress concentration at a single connection point, reducing the risk of fatigue failure due to long-term stress concentration. During the tractor's frequent operating cycles, this uniform stress distribution helps improve the fatigue strength of the entire chassis structure, ensuring the tractor's safety and reliability during long-term use.

[0069] In some embodiments, the intermediate fixed plate 206 and the intermediate movable plate 205 are provided with a fourth locking screw hole 2051 and a fifth locking screw hole. The fourth locking screw hole 2051 is provided with a fourth locking bolt 202, and the fifth locking screw hole is provided with a fifth locking bolt 207. The fixed seat 103 is connected to the half shaft sleeve 102 by bolts.

[0070] The locking screw holes on the intermediate fixed plate 206 and the intermediate movable plate 205 engage with the locking bolts, providing additional fastening points for the intermediate support assembly 8. This further enhances the connection stability between the transmission assembly 1 and the frame 2, building upon the existing welded and bolted connections. When the tractor travels on rough mountain terrain, this multi-point connection structure effectively resists forces and torques from various directions on the transmission assembly 1, ensuring its reliability and stability under complex operating conditions and reducing the risk of loosening or displacement due to bumps and vibrations.

[0071] The locking screw holes and bolt connections create a tight fit between the intermediate fixed plate 206 and the movable plate, enabling it to better withstand various loads generated by the transmission assembly 1 during operation. This helps improve the structural strength of the entire transmission system, reduces fatigue damage caused by long-term stress, extends the service life of the intermediate support assembly 8, and ensures that the tractor maintains good performance during long-term, high-intensity operation.

[0072] The design of the locking screw holes allows the force on the transmission assembly 1 to be distributed more evenly on the intermediate fixed plate 206 and the movable plate. Through bolt connection, stress can be dispersed along the intermediate fixed plate 206 and the intermediate movable plate 205, avoiding stress concentration in a local area, thereby reducing the risk of structural deformation or fracture due to stress concentration, and improving the fatigue strength and reliability of the entire intermediate support assembly 8 structure.

[0073] During assembly, the locking bolt holes provide precise positioning and fixation for the intermediate support assembly 8. The bolted connection design allows for easy disassembly and replacement of the intermediate fixed plate 206 and intermediate movable plate 205 during maintenance and repair. If a component wears or is damaged, maintenance personnel can simply loosen the bolts for replacement without requiring extensive disassembly of the entire transmission system. This maintenance-friendly design reduces maintenance costs and downtime, improving the tractor's maintainability and availability.

[0074] In some embodiments, both the intermediate fixed plate 206 and the intermediate movable plate 205 are provided with second support screw holes, and bolts are provided in the second support screw holes. The intermediate fixed plate 206, the intermediate movable plate 205 and the gearbox assembly 204 are connected by bolts.

[0075] Both the intermediate fixed plate 206 and the intermediate movable plate 205 are provided with second support screw holes, which are connected to the gearbox assembly 204 by bolts. This multi-point support connection method can significantly improve the connection stability between the transmission assembly 1 and the frame 2. In the complex mountainous operating environment of the tractor, the gearbox assembly 204 needs to withstand various loads and vibrations. The multi-point connection can effectively prevent the transmission assembly 1 from shifting or loosening during operation, ensuring the reliability and stability of the transmission system.

[0076] The second support screw hole and bolt connection allow the force on the gearbox assembly 204 to be transmitted more evenly to the intermediate fixed plate 206 and the intermediate movable plate 205, and then transmitted to the frame 2 through the fixed plate. This optimized force transmission path can reduce local stress concentration, reduce the risk of structural damage caused by stress concentration, and improve the load-bearing capacity and service life of the entire transmission system.

[0077] The second support bolt hole provides a precise positioning point for assembly, improving installation convenience. Furthermore, the bolted connection design allows for easy disassembly and replacement of components from the intermediate fixed plate 206 and intermediate movable plate 205, or the gearbox assembly 204, during maintenance and repair. If a component is worn or damaged, maintenance personnel can simply loosen the bolts for replacement without requiring extensive disassembly of the entire transmission system, reducing maintenance costs and downtime.

[0078] In some embodiments, there are two second support screw holes. In some embodiments, the fourth locking screw hole 2051 and the fifth locking screw hole are located outside the two support screw holes. A third support screw 201 and a fourth support screw 208 are respectively provided in the two second support screw holes. Providing two second support screw holes ensures the connection stability between the intermediate fixed plate 206, the intermediate movable plate 205, and the gearbox assembly 204, while avoiding increased structural complexity and cost due to an excessive number of screw holes. The symmetrical distribution of the screw holes provides sufficient connection strength, effectively preventing displacement or loosening of the transmission assembly 1 during operation, ensuring the reliability and stability of the transmission system.

[0079] In some embodiments, the bottom surface of the intermediate movable plate 205 is provided with a countersunk hole 2052, and screws pass through the intermediate fixed plate 206 and are locked in the countersunk hole 2052. The countersunk hole design on the bottom surface of the intermediate movable plate 205, combined with the screws passing through the intermediate fixed plate 206 and being locked in the countersunk hole 2052, provides additional stability and reliability for the connection between the intermediate movable plate 205 and the transmission assembly 1. In the complex mountainous operating environment of a tractor, this multi-point connection method can effectively prevent the intermediate movable plate 205 from shifting or loosening during operation, ensuring the stability and reliability of the transmission system and reducing the risk of connection failure due to vibration or load changes.

[0080] During assembly, first insert the intermediate movable plate 205 between the intermediate fixed plate 206 and the transmission assembly 1. Then, screw in the third support screw 201 and the fourth support screw 208, ensuring their ends are inserted into the countersunk holes 2052 of the intermediate movable plate 205. Tighten the third support screw 201 and the fourth support screw 208 until the upper surface of the intermediate movable plate 205 is in close contact with the intermediate fixed surface of the transmission assembly 1, and lock it with the second nut 203. Finally, tighten the fourth locking bolt 202 and the fifth locking bolt 207. This assembly sequence and method ensures the accurate installation and positioning of the intermediate movable plate 205. By initially fixing the position of the movable plate before tightening the screws, assembly errors caused by improper assembly sequence can be avoided, improving assembly accuracy and efficiency.

[0081] Specifically, the countersunk hole design allows the screw head to be embedded in the bottom surface of the intermediate movable plate 205, avoiding the screw head protruding and occupying surrounding space, thus improving the compactness of the structure. At the same time, the cooperation between the screw and the countersunk hole can better distribute the force, reduce stress concentration, improve the connection strength between the intermediate movable plate 205 and the transmission assembly 1, and enhance the load-bearing capacity of the entire transmission system.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A track-type tractor undercarriage structure, characterized by, It includes a frame and a transmission assembly, the frame being used to support the transmission assembly; The transmission assembly has a fixed support assembly and an adjustable support assembly. The fixed support assembly includes a left front engine support and a right front engine support located at the front of the frame, and a rear gearbox support located at the rear of the frame. The adjustable support assembly includes a left half-shaft support and a right half-shaft support located at the rear of the frame, and an intermediate support assembly located in the middle. The transmission assembly is connected to the frame through the fixed support assembly and the adjustable support assembly.

2. The track-laying tractor undercarriage structure according to claim 1, characterized by, The left and right half-shaft supports have the same structure, both including a sleeve support, a half-shaft sleeve, and a fixed seat. The sleeve support is welded to the half-shaft sleeve, and the fixed seat is welded to the frame. The bottom of the fixed seat is provided with a first locking screw hole, and a bolt is provided in the first locking screw hole. The fixed seat and the half-shaft sleeve are connected by bolts.

3. The track-laying tractor undercarriage structure according to claim 2, characterized by, The bottom of the fixing base is provided with two support screw holes, and support screws are provided in the two support screw holes. The first locking screw hole is located between the two support screw holes.

4. The track-laying tractor undercarriage structure according to claim 2, characterized by, The fixed base is provided with second locking screw holes on both the left and right sides, and locking bolts are provided in the second locking screw holes. The fixed base and the half shaft sleeve are connected by bolts.

5. The track-laying tractor undercarriage structure according to claim 2, characterized by The intermediate support assembly includes an intermediate fixed plate and an intermediate movable plate. The intermediate fixed plate is welded to the frame, and the intermediate movable plate is disposed between the intermediate fixed plate and the transmission assembly. The intermediate fixed plate, the intermediate movable plate, and the gearbox assembly of the transmission assembly are connected by bolts.

6. The track-laying tractor undercarriage structure according to claim 5, characterized by The intermediate fixed plate and the intermediate movable plate are provided with locking screw holes, and bolts are provided in the locking screw holes. The fixed seat is connected to the half shaft sleeve by bolts.

7. The track-laying tractor undercarriage structure according to claim 6, characterized by The intermediate fixed plate and the intermediate movable plate are provided with a fourth locking screw hole and a fifth locking screw hole. Bolts are provided in the fourth locking screw hole and the fifth locking screw hole. The fixed seat is connected to the half shaft sleeve by bolts.

8. The track-laying tractor undercarriage structure according to claim 5, characterized by Both the intermediate fixed plate and the intermediate movable plate are provided with second support screw holes, and bolts are provided in the second support screw holes. The intermediate fixed plate, the intermediate movable plate and the gearbox assembly are connected by bolts.

9. The track-laying tractor undercarriage structure according to claim 8, characterized by The number of the second support screw holes is 2.

10. The track-laying tractor undercarriage structure according to claim 8, characterized by The bottom surface of the intermediate movable plate is provided with a countersunk hole, and the screw passes through the intermediate fixed plate and is locked in the countersunk hole.

Images