Damping mechanism of crawler tractor

Abstract

The invention discloses a caterpillar tractor damping mechanism, relates to the field of caterpillar tractors, and effectively solves the problems that an existing passive damping structure cannot be adaptively adjusted according to actual loads and road conditions, and the damping effect is poor. According to the technical scheme, the damping mechanism of the crawler tractor provides main static supporting and basic buffering through a first-stage damping mechanism, impact kinetic energy is efficiently converted and dissipated through a second-stage damping mechanism, damping layers are further refined through an auxiliary damping mechanism, and a complete damping system is formed; the active damping mechanism has the capability of actively adjusting the damping characteristic according to the vibration condition, so that different road conditions and operation requirements are met, and the damping effect is comprehensive and remarkable; the two-stage damping mechanism can play a role in amplifying the stroke and optimizing the force flow, so that the spring can obtain a larger effective compression stroke in a limited space, impact energy is absorbed more sufficiently, and the damping effect is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of tracked tractor technology, and more particularly to a shock absorption mechanism for tracked tractors. Background Technology

[0002] Tracked tractors, as important agricultural and construction machinery, typically operate in extremely harsh environments, frequently navigating rugged farmland, mountains, and construction sites. Traditional tracked tractor systems often employ rigid or semi-rigid connections, offering limited shock absorption. Strong impacts and vibrations are transmitted unimpeded to the frame and cab, leading to a series of prominent problems: First, prolonged operation under intense vibration results in poor driver comfort, fatigue, and reduced work efficiency and health; second, critical components such as the engine and transmission system are subjected to constant dynamic loads, accelerating fatigue wear and shortening the overall machine's lifespan; finally, during precision seeding and fertilization operations, continuous vibration severely impacts the stability and consistency of work quality.

[0003] To address these issues, some improvements have emerged in existing technologies, such as adding rubber blocks or simple coil springs between the track rollers and the track frame. However, these solutions have limited structural functionality and often only provide limited buffering for vibrations in a specific frequency band. They are insufficient for comprehensively and effectively isolating both high-frequency, fine vibrations and low-frequency, large impacts that coexist under complex operating conditions. Furthermore, these passive damping structures cannot adaptively adjust to actual loads and road conditions, resulting in fixed damping performance and an inability to achieve an optimal balance between comfort and stability.

[0004] Therefore, there is an urgent need in this field for a tracked tractor shock absorption mechanism that can effectively absorb multi-frequency vibrations, has strong adaptability, and can significantly improve the stability and operational quality of the entire vehicle.

[0005] In view of the above, we provide a shock absorption mechanism for tracked tractors to solve the above problems. Summary of the Invention

[0006] To address the above issues, this invention provides a shock absorption mechanism for tracked tractors. This mechanism provides primary static support and basic buffering through a primary shock absorption mechanism, efficiently converts and dissipates impact kinetic energy through a secondary shock absorption mechanism, and further refines the shock absorption layers through an auxiliary shock absorption mechanism. This multi-level collaborative working mechanism constitutes a complete shock absorption system. Moreover, the active damping mechanism enables the shock absorption system to no longer be completely passive in its response, but to actively adjust its damping characteristics according to the vibration conditions, thereby adapting to different road conditions and operational needs. It can easily cope with vibrations across the entire frequency range, from high-frequency micro-vibrations to low-frequency large-amplitude impacts, resulting in comprehensive and significant shock absorption effects.

[0007] A shock absorption mechanism for a tracked tractor includes a track mounting plate and a frame mounting plate. A primary shock absorption mechanism is provided on the upper surface of the track mounting plate, and the frame mounting plate is fixedly connected to the top of the primary shock absorption mechanism. Both sides of the upper surface of the track mounting plate are provided with active damping mechanisms that can communicate with the primary shock absorption mechanism. A first hydraulic cylinder is hinged to the inner bottom wall of the track mounting plate, and a secondary shock absorption mechanism that can dampen the frame mounting plate is provided at the top of the movable rod of the first hydraulic cylinder. The upper and lower surfaces of the secondary shock absorption mechanism are provided with auxiliary shock absorption mechanisms that can provide auxiliary shock absorption for the frame mounting plate.

[0008] Preferably, the primary shock absorption mechanism includes an axial actuator, a main load-bearing spring, and an auxiliary load-bearing spring. The bottom of the fixed end of the axial actuator is hinged to a lower hinge seat, which is fixedly connected to the upper surface of the track mounting plate. The top of the movable rod of the axial actuator is hinged to an upper hinge seat, which is fixedly connected to the lower surface of the frame mounting plate.

[0009] Preferably, the main load-bearing spring is sleeved on the outside of the axial actuator, and there are several axial actuators. The several axial actuators are arranged in a rectangular array between the track mounting plate and the frame mounting plate. The bottom and top ends of the auxiliary load-bearing spring and the main load-bearing spring are fixedly connected to the upper surface of the track mounting plate and the lower surface of the frame mounting plate, respectively.

[0010] Preferably, the active damping mechanism includes an accumulator, a diverting high-pressure oil pipe, and a damping valve block. The diverting high-pressure oil pipe is connected to the oil port end of the accumulator, and its two diverting ends are respectively installed on both sides of the track mounting plate. The damping valve block is fixedly installed on the side of the axial actuator and connected to its internal oil circuit. Each side of the axial actuator is fixedly installed with a damping valve block. The two ends of the diverting high-pressure oil pipe are respectively connected to the damping valve blocks on the sides of the two axial actuators on the same side of the track mounting plate.

[0011] Preferably, the two active damping mechanisms are respectively connected to the primary shock absorption mechanisms on both sides of the upper surface of the track mounting plate and are both located in the middle of the upper surface of the track mounting plate.

[0012] Preferably, the bottom end of the first hydraulic cylinder body is hinged to one side of the upper surface of the track mounting plate and can rotate along the hinge. The top end of the movable end of the first hydraulic cylinder is connected to a secondary shock absorption mechanism that can swing in multiple directions via a spherical hinge.

[0013] Preferably, the secondary damping mechanism includes a transmission lever, a transmission plate, a second hydraulic cylinder, a first damping spring, and a second damping spring. The central fulcrum of the transmission lever is hinged to the middle of the transmission plate and passes through the surface of the transmission plate. The transmission lever is in an inclined state, and its lower end is spherically hinged to the top of the movable rod of the first hydraulic cylinder. The higher end of the transmission lever is higher than the upper surface of the transmission plate, and the second hydraulic cylinder is vertically arranged between the higher end of the transmission lever and the upper surface of the transmission plate.

[0014] Preferably, the top and bottom ends of the second hydraulic cylinder are respectively hinged to the lower surface of the higher end of the transmission lever and the upper surface of the transmission plate via a spherical hinge and a lower hinge seat. The first damping spring is sleeved on the outside of the second hydraulic cylinder, and its top and bottom ends abut against the lower surface of the transmission lever and the upper surface of the transmission plate, respectively. The second damping spring is vertically fixed to the upper surface of the higher end of the transmission lever, and its top end is fixed to the lower surface of the frame mounting plate. Transmission levers are hinged to both sides of the transmission plate.

[0015] Preferably, the auxiliary shock absorption mechanism includes a third shock absorption spring and a fourth shock absorption spring. The third shock absorption spring is vertically fixed between the transmission plate and the frame mounting plate. The top end of the fourth shock absorption spring is fixedly connected to the lower surface of the transmission plate away from the first hydraulic cylinder, and the bottom end is fixedly connected to the upper surface of the track mounting plate.

[0016] Preferably, a horizontal connecting rod is hinged between the higher ends of the transmission levers to enable asynchronous movement of the two transmission levers.

[0017] The beneficial effects of the above technical solution are as follows:

[0018] The tracked tractor's shock absorption mechanism provides primary static support and basic cushioning through a primary shock absorption mechanism, a secondary shock absorption mechanism that efficiently converts and dissipates impact kinetic energy, and an auxiliary shock absorption mechanism that further refines the shock absorption layers. This multi-level collaborative working mechanism constitutes a complete shock absorption system. Furthermore, the active damping mechanism ensures that the shock absorption system is no longer completely passively responsive, but rather has the ability to actively adjust damping characteristics according to vibration conditions, thereby adapting to different road conditions and operational needs. It can easily cope with vibrations across the entire frequency range, from high-frequency micro-vibrations to low-frequency large-amplitude impacts, resulting in comprehensive and significant shock absorption effects. The secondary shock absorption mechanism can convert the thrust of the first hydraulic cylinder into efficient compression of the second hydraulic cylinder and the shock absorption spring through the lever principle, which amplifies the stroke and optimizes the force flow. This allows the spring to achieve a greater effective compression stroke within a limited space, thereby more fully absorbing impact energy and greatly improving the shock absorption effect. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the disassembled state of the vehicle frame mounting plate of the present invention;

[0021] Figure 3 This is a schematic diagram of the disassembled state of the secondary shock absorption mechanism of the present invention;

[0022] Figure 4 This is a schematic diagram of the disassembled state of the primary shock absorption mechanism of the present invention;

[0023] Figure 5 This is a schematic diagram of the active damping mechanism of the present invention.

[0024] In the diagram: 1. Track mounting plate; 2. Frame mounting plate; 3. Primary damping mechanism; 301. Axial actuator; 302. Main load-bearing spring; 303. Auxiliary load-bearing spring; 5. Active damping mechanism; 501. Accumulator; 502. Diverting high-pressure oil pipe; 503. Damping valve block; 6. First hydraulic cylinder; 7. Secondary damping mechanism; 701. Transmission lever; 702. Transmission plate; 703. Second hydraulic cylinder; 704. First damping spring; 705. Second damping spring; 8. Auxiliary damping mechanism; 801. Third damping spring; 802. Fourth damping spring; 9. Horizontal connecting rod; 10. Support frame. Detailed Implementation

[0025] The foregoing and other technical contents, features and effects of the present invention are described in conjunction with the appendix below. Figures 1 to 5 As will be clearly shown in the detailed description of the embodiments, all structural contents mentioned in the following embodiments are with reference to the accompanying drawings.

[0026] This embodiment provides a shock absorption mechanism for a tracked tractor, as shown in the attached figure. Figure 1 and 2 As shown, the system includes a track mounting plate 1 and a frame mounting plate 2. A primary shock absorption mechanism 3 is provided on the upper surface of the track mounting plate 1, and the frame mounting plate 2 is fixedly connected to the top of the primary shock absorption mechanism 3. The primary shock absorption mechanism 3 is the direct path connecting the frame and the track, mainly bearing the static load of the vehicle body and providing basic shock absorption function. Specifically, the primary shock absorption mechanism 3 in this invention includes an axial actuator 301, a main load-bearing spring 302, and an auxiliary load-bearing spring 303. The bottom of the fixed end of the axial actuator 301 is hinged to a lower hinge seat, which is fixedly connected to the upper surface of the track mounting plate 1. The top of the movable rod of the axial actuator 301 is hinged to an upper hinge seat, which is fixedly connected to the lower surface of the frame mounting plate 2. The hinged design at both ends avoids bending moments caused by structural deformation and protects the axial actuator 301.

[0027] In one optional embodiment, the main load-bearing spring 302 is sleeved on the outside of the axial actuator 301, and there are several axial actuators 301. These axial actuators 301 are arranged in a rectangular array between the track mounting plate 1 and the frame mounting plate 2, forming a stable and reliable main load-bearing frame. The bottom and top ends of the auxiliary load-bearing spring 303 and the main load-bearing spring 302 are fixedly connected to the upper surface of the track mounting plate 1 and the lower surface of the frame mounting plate 2, respectively. The main load-bearing spring 302 provides most of the elastic support force, while the auxiliary load-bearing spring 303 is arranged independently, further increasing the stiffness and redundancy of the system. It works in conjunction with the main spring to optimize the elastic characteristics under different loads. The axial actuator 301 can be passively extended or retracted, or its length can be actively adjusted under the control of the control unit to achieve vehicle height adjustment and damping compensation.

[0028] Both sides of the upper surface of the track mounting plate 1 are provided with active damping mechanisms 5 that can communicate with the primary shock absorption mechanism 3. The active damping mechanisms 5 are respectively connected to the primary shock absorption mechanisms 3 on both sides of the upper surface of the track mounting plate 1 and are all located in the middle of the upper surface of the track mounting plate 1; specifically, as shown in the attached figure. Figure 4 and 5 As shown, the active damping mechanism 5 includes an accumulator 501, a high-pressure oil pipe 502, and a damping valve block 503. The high-pressure oil pipe 502 is connected to the oil port end of the accumulator 501, and its two branch ends are respectively installed on both sides of the track mounting plate 1. A support frame 10 is fixedly installed on the outside of the accumulator 501, and the bottom of the support frame 10 is fixedly connected to the upper surface of the track mounting plate 1 by bolts, which can support and fix the accumulator 501. As a high-pressure gas-liquid buffer container, the accumulator 501 can quickly absorb high-frequency, low-amplitude vibrations from the road surface, greatly improving the ride comfort. The damping valve block... 503 is fixedly installed on the side of the axial actuator 301 and connected to its internal oil circuit. Each axial actuator 301 has a damping valve block 503 fixedly installed on its side. The damping valve block 503 contains a throttle valve and a check valve to generate controllable damping force and consume vibration energy. The two ends of the diversion high-pressure oil pipe 502 are respectively connected to the damping valve blocks 503 on the sides of the two axial actuators 301 on the same side of the track mounting plate 1, forming a hydraulic interconnection system. The hydraulic interconnection makes the pressure of the two damping points on the same side correlated, which helps to suppress the torsion and unbalanced impact of the track frame and enhances stability.

[0029] The inner bottom wall of the track mounting plate 1 is hinged to a first hydraulic cylinder 6, and the top of the movable rod of the first hydraulic cylinder 6 is provided with a secondary shock absorption mechanism 7 that can dampen the frame mounting plate 2. The bottom end of the cylinder body of the first hydraulic cylinder 6 is hinged to one side of the upper surface of the track mounting plate 1 and can rotate along the hinge. The top of the movable end of the first hydraulic cylinder 6 is spherically hinged to a secondary shock absorption mechanism 7 that can swing in multiple directions.

[0030] For details, see attached. Figure 3 As shown, the secondary damping mechanism 7 of this invention includes a transmission lever 701, a transmission plate 702, a second hydraulic cylinder 703, a first damping spring 704, and a second damping spring 705. The central fulcrum of the transmission lever 701 is hinged to the middle of the transmission plate 702 and passes through the surface of the transmission plate 702. The transmission lever 701 is in an inclined state, and its lower end is spherically hinged to the top of the movable rod of the first hydraulic cylinder 6. The higher end of the transmission lever 701 is higher than the upper surface of the transmission plate 702, and the second hydraulic cylinder 703 is vertically arranged between the higher end of the transmission lever 701 and the upper surface of the transmission plate 702. When the lower end is pushed up by the first hydraulic cylinder 6, the transmission lever 701 rotates around the fulcrum, and its higher end generates an amplified downward displacement and force, which strongly compresses the second hydraulic cylinder 703 located below it and the first damping spring 704 sleeved outside it. The impact kinetic energy is effectively converted into the elastic potential energy of the spring and the damping heat energy of the hydraulic cylinder and dissipated.

[0031] The top and bottom ends of the second hydraulic cylinder 703 are respectively hinged to the lower surface of the higher end of the transmission lever 701 and the upper surface of the transmission plate 702 via a spherical hinge and a lower hinge seat. The first damping spring 704 is sleeved on the outside of the second hydraulic cylinder 703, with its top and bottom ends abutting against the lower surface of the transmission lever 701 and the upper surface of the transmission plate 702, respectively. The second damping spring 705 is vertically fixed to the upper surface of the higher end of the transmission lever 701, with its top end fixed to the lower surface of the frame mounting plate 2. Transmission levers 701 are hinged to both sides of the transmission plate 702. A horizontal connecting rod 9 is hinged between the higher ends of the transmission levers 701 to enable asynchronous movement of the two transmission levers 701. When the side drive lever 701 moves, it forces the other side to move in conjunction with it through the horizontal connecting rod 9, thereby effectively suppressing the body's tilt and significantly improving stability when cornering or encountering obstacles on one side. Furthermore, when one track presses down on an obstacle, the first hydraulic cylinder 6 on that side can drive the drive lever 701 on the same side to move. The two drive levers 701, which are hinged by the horizontal connecting rod 9, can generate asynchronous movements with each other, so that the drive levers 701, the second hydraulic cylinder 703, the first damping spring 704, and the second damping spring 705 on both sides can produce different damping effects, thereby effectively suppressing the lateral tilt of the body and significantly improving the lateral stability and safety of the tractor during driving and operation.

[0032] The upper and lower surfaces of the secondary damping mechanism 7 are both equipped with auxiliary damping mechanisms 8, which can provide auxiliary damping for the frame mounting plate 2. Specifically, see attached... Figure 2 and 3As shown, the auxiliary shock absorption mechanism 8 includes a third shock absorption spring 801 and a fourth shock absorption spring 802. The third shock absorption spring 801 is vertically fixed between the transmission plate 702 and the frame mounting plate 2. The third shock absorption spring 801 is connected between the transmission plate 702 and the frame mounting plate 2, and is connected in parallel with the second shock absorption spring 705 to jointly bear the impact from the lever. The top end of the fourth shock absorption spring 802 is fixedly connected to the side of the lower surface of the transmission plate 702 away from the first hydraulic cylinder 6, and the bottom end is fixedly connected to the upper surface of the track mounting plate 1. The fourth shock absorption spring 802 is connected between the side of the lower surface of the transmission plate 702 away from the first hydraulic cylinder 6 and the track mounting plate 1 to balance the force on the transmission plate 702, prevent it from warping, and provide additional restoring force.

[0033] When the track rolls over an obstacle, it generates an upward impact force, which is directly transmitted to the track mounting plate 1. The upward movement of the track mounting plate 1 first compresses the primary shock absorption mechanism 3. The main load-bearing spring 302 and the auxiliary load-bearing spring 303, as the main load-bearing and elastic elements, are immediately compressed, absorbing part of the initial impact energy and transmitting part of the impact force smoothly to the frame through the frame mounting plate 2. At the same time, the axial actuator 301 connected in parallel with the spring contracts accordingly, and the hydraulic oil inside is compressed and begins to flow.

[0034] Hydraulic oil, compressed from inside the axial actuator 301, flows into the damping valve block 503 integrated on its side. For minor high-frequency, low-amplitude vibrations, the oil pressure fluctuates rapidly. At this time, most of the fluctuating oil flows into the accumulator 501 through the high-pressure oil pipe 502. The inert gas inside the accumulator 501 is compressed, acting like an "air cushion," quickly absorbing and storing this pulsed hydraulic energy, thus efficiently filtering out high-frequency, minor vibrations. For larger impacts, the oil generates a strong damping force when flowing through the throttle valve inside the damping valve block 503, converting mechanical energy into heat energy. The pressure is consumed, and since the two axial actuators 301 on the same side are interconnected through the high-pressure oil pipe 502, the pressure will automatically balance between the two, effectively suppressing the torsional deformation and unilateral impact of the track mounting plate 1, and enhancing the overall stability of the chassis; at the same time, by adjusting the extension and retraction of the axial actuator 301 through the control unit, the distance between the frame mounting plate 2 and the track mounting plate 1 can be actively adjusted, thereby adjusting the force of the spring between the two, and by adjusting the opening of the proportional valve in the damping valve block 503, the damping stiffness can be changed in real time to adapt to different loads and road conditions, and achieve the optimal shock absorption effect;

[0035] The upward movement of the track mounting plate 1 simultaneously pushes the cylinder body of the first hydraulic cylinder 6, which is hinged to it, forcing the piston rod of the first hydraulic cylinder 6 to extend outward. The top of the piston rod lifts the lower end of the transmission lever 701 through a spherical hinge. The transmission lever 701 then rotates around the fulcrum connected to the transmission plate 702 in its middle. The violent downward pressure of the higher end of the lever strongly compresses the second hydraulic cylinder 703 located below it and the first shock-absorbing spring 704 sleeved on its outside, efficiently converting the huge impact kinetic energy into the elastic potential energy of the spring. At the same time, the second shock-absorbing spring 705 is also directly compressed, transmitting the force to the frame mounting plate 2. During this process, the second hydraulic cylinder 703 provides strong secondary hydraulic damping, further converting the energy into heat dissipation, ensuring that the impact is quickly suppressed.

[0036] When the impact mainly comes from one side of the tractor, the secondary shock absorption mechanism 7 on that side will work violently as described above. At this time, the horizontal connecting rod 9, which connects the transmission levers 701 on the left and right sides, begins to play its role. The transmission lever 701 on the impacted side produces a larger range of motion than the other side. The horizontal connecting rod 9 can prevent the transmission levers 701 on both sides from moving asynchronously, thereby effectively suppressing the lateral tilt of the frame mounting plate 2 and the upper body, and greatly improving the lateral stability and safety of the tractor during driving and operation.

[0037] Throughout the process, the auxiliary damping mechanism 8 always provides compensatory support. The third damping spring 801 is connected in parallel with the second damping spring 705 to further assist in bearing and buffering the impact transmitted from the transmission lever 701. The fourth damping spring 802 balances the force on the transmission plate 702, preventing it from warping due to uneven force, ensuring the smooth movement of the entire secondary damping mechanism 7, and providing additional restoring force.

[0038] Through the layered buffering and energy dissipation of the above-mentioned structures, the initial violent impact has been converted into the elastic potential energy of multiple springs and the heat of the hydraulic system. Finally, a force that has been greatly weakened and become extremely gentle is transmitted to the frame mounting plate 2 and the tractor main frame through the top of the first-level shock absorption mechanism 3, the second shock absorption spring 705 and the third shock absorption spring 801, ensuring that the cab remains stable at all times.

[0039] The above description is only for illustrating the present invention and should be understood as not being limited to the above embodiments. Various modifications that conform to the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A shock absorption mechanism for a tracked tractor, comprising a track mounting plate (1) and a frame mounting plate (2), characterized in that, The upper surface of the track mounting plate (1) is provided with a primary shock absorption mechanism (3) and the frame mounting plate (2) is fixedly connected to the top of the primary shock absorption mechanism (3). Both sides of the upper surface of the track mounting plate (1) are provided with active damping mechanisms (5) that can communicate with the primary shock absorption mechanism (3). The inner bottom wall of the track mounting plate (1) is hinged with a first hydraulic cylinder (6) and the top of the movable rod of the first hydraulic cylinder (6) is provided with a secondary shock absorption mechanism (7) that can dampen the frame mounting plate (2). The upper and lower surfaces of the secondary shock absorption mechanism (7) are provided with auxiliary shock absorption mechanisms (8) that can play an auxiliary shock absorption role for the frame mounting plate (2).

2. The shock absorption mechanism for a tracked tractor according to claim 1, characterized in that, The primary shock absorption mechanism (3) includes an axial actuator (301), a main load-bearing spring (302) and an auxiliary load-bearing spring (303). The bottom of the fixed end of the axial actuator (301) is hinged to a lower hinge seat and the lower hinge seat is fixedly connected to the upper surface of the track mounting plate (1). The top of the movable rod of the axial actuator (301) is hinged to an upper hinge seat and the upper hinge seat is fixedly connected to the lower surface of the frame mounting plate (2).

3. The shock absorption mechanism for a tracked tractor according to claim 2, characterized in that, The main load-bearing spring (302) is sleeved on the outside of the axial actuator (301), and there are several axial actuators (301). The several axial actuators (301) are arranged in a rectangular array between the track mounting plate (1) and the frame mounting plate (2). The bottom and top ends of the auxiliary load-bearing spring (303) and the main load-bearing spring (302) are fixedly connected to the upper surface of the track mounting plate (1) and the lower surface of the frame mounting plate (2), respectively.

4. A shock absorption mechanism for a tracked tractor according to claim 2, characterized in that, The active damping mechanism (5) includes an accumulator (501), a diversion high-pressure oil pipe (502), and a damping valve block (503). The diversion high-pressure oil pipe (502) is connected to the oil port end of the accumulator (501), and its two diversion ends are respectively installed on both sides of the track mounting plate (1). The damping valve block (503) is fixedly installed on the side of the axial actuator (301) and connected to its internal oil circuit. Each axial actuator (301) is fixedly installed with a damping valve block (503) on its side. The two ends of the diversion high-pressure oil pipe (502) are respectively connected to the damping valve blocks (503) on the sides of the two axial actuators (301) on the same side of the track mounting plate (1).

5. A shock absorption mechanism for a tracked tractor according to claim 1, characterized in that, The two active damping mechanisms (5) are respectively connected to the first-level shock absorption mechanisms (3) on both sides of the upper surface of the track mounting plate (1) and are both located in the middle of the upper surface of the track mounting plate (1).

6. A shock absorption mechanism for a tracked tractor according to claim 1, characterized in that, The bottom end of the first hydraulic cylinder (6) is hinged to one side of the upper surface of the track mounting plate (1) and can rotate along the hinge. The top end of the movable end of the first hydraulic cylinder (6) is connected to a secondary shock absorption mechanism (7) that can swing in multiple directions through a spherical hinge.

7. A shock absorption mechanism for a tracked tractor according to claim 2, characterized in that, The secondary damping mechanism (7) includes a transmission lever (701), a transmission plate (702), a second hydraulic cylinder (703), a first damping spring (704), and a second damping spring (705). The middle fulcrum of the transmission lever (701) is hinged to the middle of the transmission plate (702) and passes through the surface of the transmission plate (702). The transmission lever (701) is in an inclined state, and the lower end is spherically hinged to the top of the movable rod of the first hydraulic cylinder (6). The higher end of the transmission lever (701) is higher than the upper surface of the transmission plate (702), and the second hydraulic cylinder (703) is vertically arranged between the higher end of the transmission lever (701) and the upper surface of the transmission plate (702).

8. A shock absorption mechanism for a tracked tractor according to claim 7, characterized in that, The top and bottom ends of the second hydraulic cylinder (703) are respectively hinged to the lower surface of the higher end of the transmission lever (701) and the upper surface of the transmission plate (702) through a spherical hinge and a lower hinge seat. The first damping spring (704) is sleeved on the outside of the second hydraulic cylinder (703) and its top and bottom ends abut against the lower surface of the transmission lever (701) and the upper surface of the transmission plate (702) respectively. The second damping spring (705) is vertically fixed to the upper surface of the higher end of the transmission lever (701) and its top end is fixed to the lower surface of the frame mounting plate (2). The transmission lever (701) is hinged to both sides of the transmission plate (702).

9. A shock absorption mechanism for a tracked tractor according to claim 7, characterized in that, The auxiliary shock absorption mechanism (8) includes a third shock absorption spring (801) and a fourth shock absorption spring (802). The third shock absorption spring (801) is vertically fixed between the transmission plate (702) and the frame mounting plate (2). The top end of the fourth shock absorption spring (802) is fixedly connected to the side of the lower surface of the transmission plate (702) away from the first hydraulic cylinder (6), and the bottom end is fixedly connected to the upper surface of the track mounting plate (1).

10. A shock absorption mechanism for a tracked tractor according to claim 7, characterized in that, A horizontal connecting rod (9) is hinged between the higher ends of the two transmission levers (701) to enable asynchronous movement of the two transmission levers (701).

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