Crawler-mounted rotary cultivator

Abstract

The application discloses a caterpillar self-propelled rotary cultivator, which comprises a chassis system, a power system, a transmission system and a rotary cultivator device. The chassis system comprises a frame assembly, a walking driving mechanism and a walking caterpillar assembly. The walking driving mechanism comprises a gearbox arranged at the front end of the frame assembly. The walking caterpillar assembly comprises caterpillars arranged at the left and right sides of the frame assembly, a driving wheel drivingly connected with the output end of the gearbox, rear wheels supporting the caterpillars and a plurality of supporting wheels. The power system comprises an engine and a fuel tank. The engine is arranged on the frame assembly and drivingly connected with the output end of the gearbox. The fuel tank is arranged on the frame assembly. The transmission system comprises a PTO transmission box and a rear output transmission shaft. The input end of the PTO transmission box is drivingly connected with the output end of the engine, and the rear output end of the PTO transmission box is connected with the rear output transmission shaft. The rotary cultivator device is arranged at the tail of the chassis system. Compared with the prior art, the application realizes comprehensive improvement in power transmission, structural layout, driving experience and operation adaptability.

Description

Technical Field

[0001] This application relates to the field of rotary tiller technology, and more specifically to a tracked self-propelled rotary tiller. Background Technology

[0002] In the process of agricultural modernization, tracked self-propelled rotary tillers have become important equipment for farmland cultivation due to their excellent maneuverability and adaptability. However, there are still some areas in the design and performance of existing tracked self-propelled rotary tillers that need to be optimized.

[0003] Taking the existing technology represented by the utility model "A Tracked Self-Propelled Rotary Tiller" with authorization announcement number CN221178338U as an example, some rotary tillers have shortcomings in terms of power distribution and transmission. The engine power cannot be efficiently and rationally distributed to the walking system and the rotary tillage system, resulting in low power utilization efficiency and serious energy waste. At the same time, the transmission structure is complex, making installation and maintenance difficult, increasing operating costs and maintenance workload.

[0004] In terms of operation, the cab layout of some rotary tillers is not reasonable enough. Although some designs raise the driver's seat to improve visibility, the overall layout fails to balance visibility and ease of maintenance. When the driver's visibility is limited, it is difficult to observe the working environment and road conditions ahead in a timely and accurate manner, affecting operational safety and efficiency; while insufficient maintenance space makes daily maintenance and repair of critical components such as the engine difficult, increasing equipment downtime. Therefore, developing a tracked self-propelled rotary tiller that performs better in terms of power distribution, transmission, driving operation, rotary tillage device adjustment, air intake filtration, and overall structural layout is of great practical significance. Utility Model Content

[0005] In order to overcome the above-mentioned technical defects, this application provides a tracked self-propelled rotary tiller.

[0006] According to this application, a tracked self-propelled rotary tiller is provided, comprising:

[0007] The chassis system includes a frame assembly, a drive mechanism, and a track assembly; the drive mechanism includes a gearbox located at the front end of the frame assembly; the track assembly includes tracks located on the left and right sides of the frame assembly, drive wheels connected to the output end of the gearbox, and rear wheels and several support wheels that support the tracks.

[0008] The powertrain includes an engine and a fuel tank; the engine is mounted on the chassis assembly and its output is connected to the transmission; the fuel tank is mounted on the chassis assembly.

[0009] The transmission system includes a PTO transmission box and a rear output drive shaft; the input end of the PTO transmission box is driven to the output end of the engine, and its rear output end is connected to the rear output drive shaft.

[0010] The rotary tillage device is located at the rear of the chassis system and is driven by the rear output drive shaft.

[0011] Preferably, the left and right output ends of the gearbox are provided with half shafts, and the drive wheel in the track assembly is driven to the gearbox through the half shafts.

[0012] Preferably, the output end of the engine is provided with an engine pulley, the input end of the gearbox is provided with a first pulley, and the engine and the gearbox are driven by a first belt wrapped around the engine pulley and the first pulley;

[0013] The input end of the PTO transmission box is provided with a second pulley, and the PTO transmission box and the engine are driven by a second belt that wraps around the engine pulley and the second pulley.

[0014] Preferably, the walking drive mechanism further includes a walking tensioning mechanism, which includes a rocker arm, a screw, and a tensioning wheel assembly;

[0015] The rocker arm is rotatably mounted on the gearbox, and the screw is rotatably mounted on the frame assembly;

[0016] The tensioning wheel assembly includes a rotating shaft, a tensioning wheel, and a tensioning retainer. The rotating shaft is mounted on the rocker arm, the tensioning wheel is rotatably sleeved on the rotating shaft, and the lower part of the tensioning wheel acts above the first belt.

[0017] The tensioning fastener is installed at the end of the rotating shaft away from the rocker arm, and the tensioning fastener is sleeved on the screw.

[0018] The walking tensioning mechanism also includes an adjusting seat and a compression spring. The adjusting seat is sleeved on the screw and located above the tensioning fixture. The compression spring is connected between the adjusting seat and the tensioning fixture. An extension nut is threaded to the upper end of the screw, and the extension nut is used to press the adjusting seat.

[0019] Preferably, the fuel tank is installed below the vehicle frame assembly and located below the oil pan of the engine.

[0020] Preferably, the engine is fixed to the vehicle frame assembly by multiple engine mounting brackets, and the oil pan of the engine is lower than the upper surface of the vehicle frame assembly; the fuel tank is connected to the vehicle frame assembly by a coupling point, the top of which is adjacent to the engine oil pan, and the fuel tank is equipped with a fuel tank protective cover around its perimeter and bottom.

[0021] Preferably, it also includes a cab assembly, the front end of which is mounted on the frame assembly and the rear end of which is connected to the upper frame; the cab assembly includes a seat, a roof, a windshield and protective components, and the seat is mounted above the upper frame.

[0022] Preferably, the engine's air intake is further provided with an air intake system, which includes an air filter and an air pre-filter.

[0023] Preferably, the rotary tiller is mounted at the rear of the chassis system via a suspension frame, which is mounted at the rear of the chassis system via two clamps, and two hydraulic cylinders are mounted on it to control the lifting and lowering of the rotary tiller.

[0024] Preferably, a radiator is also provided on one side of the engine.

[0025] Compared to existing technologies, this application has the following significant advantages: The tracked self-propelled rotary tiller of this application has significant advantages. In terms of power transmission, it adopts a dual-belt drive structure, allowing the engine to simultaneously power both the gearbox and the PTO transmission, achieving rational power distribution and efficient utilization. It also facilitates adjustment of the transmission ratio, flexibly adapting to different operational needs, reducing energy loss during power transmission, and improving walking efficiency and operational performance. The fuel tank is installed below the engine oil pan under the chassis, making full use of space, resulting in a compact structure, lowering the center of gravity, improving driving stability, reducing pitch angle when crossing field ridges, preventing the vehicle from tipping over, and improving operational safety. The cab layout is reasonable, with the seat located above and in front of the engine, ensuring good visibility for the driver and providing ample maintenance space inside the cab for easy maintenance and repair of components such as the engine. The rotary tillage device is mounted via a suspension frame and equipped with a hydraulic cylinder for lifting control, allowing for flexible height adjustment according to different working depths and terrains to meet diverse operational needs. Overall, this application achieves comprehensive improvements in power transmission, structural layout, driving experience, and operational adaptability. Attached Figure Description

[0026] Figure 1 This is a structural schematic diagram of a tracked self-propelled rotary tiller according to this application.

[0027] Figure 2 This is a top view of the frame assembly of this application.

[0028] Figure 3 This is a schematic diagram of the main structural part of the frame assembly of this application.

[0029] Figure 4 This is a schematic diagram of the engine structure of the engine described in this application.

[0030] Figure 5 This is a structural schematic diagram of the PTO transmission box in this application.

[0031] Figure 6 This is a schematic diagram of the walking tensioning mechanism of this application.

[0032] Figure 7 This is an installation diagram of the seat in this application.

[0033] Reference numerals: 1. Chassis system; 2. Power system; 3. Transmission system; 4. First pulley; 5. Cab assembly; 6. Rotary tiller; 7. Frame assembly; 8. Travel drive mechanism; 9. Track assembly; 10. Gearbox; 11. Half shaft; 12. Drive wheel; 13. Engine; 14. Intake system; 15. Radiator; 16. Fuel tank; 17. Engine pulley; 18. PTO transmission box; 19. Rear output drive shaft; 20. First belt; 21. Second pulley; 22. Second belt; 23. Seat; 24. Suspension device; 25. Rear wheel; 26. Track roller; 27. Travel tensioning mechanism; 28. Screw; 29. ​​Engine mounting bracket; 30. Upper frame; 31. Rocker arm; 32. Tensioner wheel; 33. Tensioner retainer; 34. Compression spring; 35. Adjustment seat; 36. Extended nut. Detailed Implementation

[0034] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0035] As attached Figure 1 - Appendix Figure 7 As shown, according to this application, a tracked self-propelled rotary tiller is provided, comprising:

[0036] The chassis system 1 includes a frame assembly 7, a drive mechanism 8, and a track assembly 9. The drive mechanism 8 includes a gearbox 10 located at the front end of the frame assembly 7. The track assembly 9 includes tracks located on the left and right sides of the frame assembly 7, drive wheels 12 driven and connected to the output end of the gearbox 10, and rear wheels 25 and several support wheels 26 supporting the tracks. The power system 2 includes an engine 13 and a fuel tank 16. The engine 13 is located on the frame assembly 7, and its output end is driven and connected to the gearbox 10. The fuel tank 16 is located on the frame assembly 7. The transmission system 3 includes a PTO transmission box 18 and a rear output drive shaft 19. The input end of the PTO transmission box 18 is driven and connected to the output end of the engine 13, and its rear output end is connected to the rear output drive shaft 19.

[0037] The rotary tillage device 6 is located at the rear of the chassis system 1 and is driven by the rear output drive shaft 19.

[0038] In one embodiment, the left and right output ends of the gearbox 10 are each equipped with a half-shaft 11. The drive wheel 12 in the track assembly 9 is driven by the gearbox 10 through the half-shaft 11. Specifically, one end of the half-shaft 11 is tightly fitted to the output end of the gearbox 10, and the other end is connected to the center hole of the drive wheel 12. This connection method ensures that power is stably and efficiently transmitted from the gearbox 10 to the drive wheel 12, thereby driving the track to move. The connection through the half-shaft 11 makes the transmission between the drive wheel 12 and the gearbox 10 more reliable, reduces energy loss during power transmission, and improves the walking efficiency and stability of the rotary tiller.

[0039] Furthermore, the output end of the engine 13 is provided with an engine pulley 17, and the input end of the gearbox 10 is provided with a first pulley 4. The engine 13 and the gearbox 10 are connected by a first belt 20 wrapped around the engine pulley 17 and the first pulley 4. This belt drive method has the advantages of simple structure, convenient installation, and low cost. At the same time, it can also play a certain role in buffering and shock absorption, reducing the impact of the vibration of the engine 13 during operation on the gearbox 10.

[0040] Furthermore, the input end of the PTO transmission box 18 is equipped with a second pulley 21. The PTO transmission box 18 and the engine 13 are connected by a second belt 22 wrapped around the engine pulley 17 and the second pulley 21 for driving connection. Through this dual belt drive structure, the engine 13 can simultaneously provide power to the gearbox 10 and the PTO transmission box 18, realizing the rational distribution and efficient utilization of power. Moreover, the belt drive method facilitates the adjustment of the transmission ratio, and the transmission relationship between the engine 13, gearbox 10, and PTO transmission box 18 can be flexibly adjusted according to actual operating requirements.

[0041] In one embodiment, the walking drive mechanism 8 further includes a walking tensioning mechanism 27. The walking tensioning mechanism 27 mainly includes a rocker arm 31, a screw 28, and a tensioning wheel assembly. The rocker arm 31 is rotatably mounted on the gearbox 10 and can rotate freely within a certain range; the screw 28 is rotatably mounted on the frame assembly 7 and provides support for subsequent adjustments.

[0042] The tensioning pulley assembly includes a rotating shaft, a tensioning pulley 32, and a tensioning retainer 33. The rotating shaft is mounted on a rocker arm 31, and the tensioning pulley 32 is rotatably sleeved on the rotating shaft, with the lower part of the tensioning pulley 32 acting above the first belt 20. The tensioning retainer 33 is mounted on the end of the rotating shaft away from the rocker arm 31 and is sleeved on the screw 28.

[0043] The traveling tensioning mechanism 27 also includes an adjusting seat 35 and a compression spring 34. The adjusting seat 35 is sleeved on the screw 28 and located above the tensioning retainer 33; the compression spring 34 is connected between the adjusting seat 35 and the tensioning retainer 33. An extension nut 36 is threadedly connected to the upper end of the screw 28, and the extension nut 36 is used to press the adjusting seat 35.

[0044] Its working principle is as follows: The tensioning pulley 32 is located above the first belt 20, applying pressure to the first belt 20. When it is necessary to adjust the tension of the first belt 20, this can be achieved by adjusting the position of the extension nut 36. When the extension nut 36 is adjusted downwards, it pushes the adjusting seat 35 downwards, which in turn drives the compression spring 34 downwards, thereby adjusting the downward pressure of the compression spring 34. The downward pressure of the compression spring 34 acts on the tensioning retainer 33, which in turn transmits the downward pressure to the tensioning pulley 32, increasing the downward pressure of the tensioning pulley 32 on the first belt 20, thus making the first belt 20 tighter; conversely, when the extension nut 36 is adjusted upwards, the downward pressure of the compression spring 34 decreases, and the downward pressure of the tensioning pulley 32 on the first belt 20 also decreases, making the first belt 20 looser. During the up-and-down swinging of the tensioning pulley 32, the screw 28 also swings accordingly, and the compression spring 34 ensures the flexibility of the tensioning pulley 32, allowing it to always fit tightly against the first belt 20, ensuring the stability of the transmission.

[0045] The fuel tank 16 is mounted below the frame assembly 7 and below the oil pan of the engine 13. This mounting position has several advantages. First, mounting the fuel tank 16 below the oil pan of the engine 13 makes full use of the space under the frame assembly 7, making the overall structure of the rotary tiller more compact. Second, this layout helps to lower the center of gravity of the rotary tiller, improving its driving stability, especially when crossing complex terrain such as field ridges, effectively reducing pitch angles, avoiding problems such as vehicle tipping, and improving operational safety.

[0046] In one embodiment, the engine 13 is secured to the frame assembly 7 via multiple engine mounting brackets 29, and the oil pan of the engine 13 is lower than the upper surface of the frame assembly 7. This securing method ensures that the engine 13 is firmly installed, reducing vibration and shaking during operation. Simultaneously, the lowering of the oil pan of the engine 13 from the upper surface of the frame assembly 7 further lowers the rotary tiller's center of gravity.

[0047] The fuel tank 16 is connected to the frame assembly 7 via a mounting point. Its top is adjacent to the oil pan of the engine 13, and the fuel tank 16 is equipped with a fuel tank protective cover around its perimeter and bottom. The fuel tank protective cover protects the fuel tank 16 from impacts and damage during operation, thereby improving the service life and safety of the fuel tank 16.

[0048] In one embodiment, the vehicle also includes a cab assembly 5, with its front end mounted on the frame assembly 7 and its rear end connected to the upper frame 30. The cab assembly 5 includes a seat 23, a roof, a windshield, and protective components. The seat 23 is mounted above the upper frame 30, a layout that positions the seat 23 in front of and above the engine 13. This overall layout adjustment ensures that the driver has good visibility, enabling clear observation of the working environment and road conditions ahead, while also providing ample maintenance space inside the cab for routine maintenance and repair of components such as the engine 13.

[0049] The air intake of engine 13 is also equipped with an air intake system 14, which includes an air filter and an air pre-filter. The air pre-filter can perform preliminary filtration of the air entering engine 13, removing larger particulate impurities such as dust and leaves; the air filter further performs fine filtration of the air, ensuring that the air entering engine 13 is clean, reducing wear on internal parts of engine 13, and improving the service life and performance of engine 13.

[0050] In one embodiment, the rotary tiller 6 is mounted at the rear of the chassis system 1 via a suspension frame 24. The suspension frame 24 is mounted at the rear of the chassis system 1 using two clamps; this mounting method is simple and reliable, ensuring the rotary tiller 6 is securely installed. Two hydraulic cylinders are mounted on the suspension frame 24; by controlling the extension and retraction of these two hydraulic cylinders, the raising and lowering of the rotary tiller 6 can be achieved. In actual operation, the height of the rotary tiller 6 can be flexibly adjusted according to different working depths and terrain conditions to meet diverse operational needs.

[0051] In one embodiment, a radiator 15 is also provided on one side of the engine 13. The radiator 15 can dissipate the heat generated during the operation of the engine 13 in a timely manner, maintain the normal operating temperature of the engine 13, prevent the engine 13 from malfunctioning due to overheating, and ensure the stable operation of the rotary tiller.

[0052] The above embodiments are only used to illustrate the technical solutions of the embodiments of this application, and are not intended to limit them; although referring to the foregoing embodiments

[0053] The embodiments of this application have been described in detail. 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 of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope defined by the claims of this application.

Claims

1. A track-towed rotary cultivator, characterized in that include: The chassis system (1) includes a frame assembly (7), a travel drive mechanism (8), and a travel track assembly (9); the travel drive mechanism (8) includes a gearbox (10) located at the front end of the frame assembly (7); the travel track assembly (9) includes tracks located on the left and right sides of the frame assembly (7), drive wheels (12) driven and connected to the output end of the gearbox (10), and rear wheels (25) and several support wheels (26) supporting the tracks; The power system (2) includes an engine (13) and a fuel tank (16); the engine (13) is mounted on the frame assembly (7) and its output is connected to the gearbox (10); the fuel tank (16) is mounted on the frame assembly (7); The transmission system (3) includes a PTO transmission box (18) and a rear output drive shaft (19); the input end of the PTO transmission box (18) is driven to the output end of the engine (13), and its rear output end is connected to the rear output drive shaft (19). The rotary tillage device (6) is located at the rear of the chassis system (1) and is driven by the rear output drive shaft (19).

2. A track-tread rotary cultivator according to claim 1, characterized in that: The left and right output ends of the gearbox (10) are provided with half shafts (11), and the drive wheel (12) in the walking track assembly (9) is driven to the gearbox (10) through the half shafts (11).

3. The track-tread, self-propelled rotary cultivator according to claim 1, characterized in that: The output end of the engine (13) is provided with an engine pulley (17), and the input end of the gearbox (10) is provided with a first pulley (4). The engine (13) and the gearbox (10) are connected by a first belt (20) that wraps around the engine pulley (17) and the first pulley (4). The input end of the PTO transmission box (18) is provided with a second pulley (21). The PTO transmission box (18) and the engine (13) are connected by a second belt (22) that wraps around the engine pulley (17) and the second pulley (21).

4. A track-tread rotary cultivator according to claim 3, characterized in that: The walking drive mechanism (8) also includes a walking tensioning mechanism (27), which includes a rocker arm (31), a screw (28), and a tensioning wheel assembly; The rocker arm (31) is rotatably mounted on the gearbox (10), and the screw (28) is rotatably mounted on the frame assembly (7); The tensioning wheel assembly includes a rotating shaft, a tensioning wheel (32), and a tensioning retainer (33). The rotating shaft is mounted on the rocker arm (31), and the tensioning wheel (32) is rotatably sleeved on the rotating shaft. The lower part of the tensioning wheel (32) acts above the first belt (20). The tensioning fastener (33) is installed at the end of the rotating shaft away from the rocker arm (31), and the tensioning fastener (33) is sleeved on the screw (28); The walking tensioning mechanism (27) also includes an adjusting seat (35) and a compression spring (34). The adjusting seat (35) is sleeved on the screw (28) and located above the tensioning fixer (33). The compression spring (34) is connected between the adjusting seat (35) and the tensioning fixer (33). An extension nut (36) is threaded to the upper end of the screw (28). The extension nut (36) is used to press the adjusting seat (35).

5. The track-tread, self-propelled rotary cultivator according to claim 1, characterized in that: The fuel tank (16) is mounted below the frame assembly (7) and located below the oil pan of the engine (13).

6. The track-tread, self-propelled rotary cultivator according to claim 1, characterized in that: The engine (13) is fixed to the frame assembly (7) by multiple engine mounting brackets (29), and the oil pan of the engine (13) is lower than the upper surface of the frame assembly (7); the fuel tank (16) is connected to the frame assembly (7) by a coupling point, its top is adjacent to the oil pan of the engine (13), and the fuel tank (16) is equipped with a fuel tank protective cover around its perimeter and bottom.

7. The track-tread, self-propelled rotary cultivator of claim 1, wherein: It also includes a cab assembly (5), the front end of which is mounted on the frame assembly (7), and the rear end of which is connected to the upper frame (30); the cab assembly (5) includes a seat (23), a roof, a windshield and protective components, and the seat (23) is mounted above the upper frame (30).

8. The track-tread, self-propelled rotary cultivator of claim 1, wherein: The engine (13) is also provided with an air intake system (14) at its air intake port, the air intake system (14) including an air filter and an air pre-filter.

9. The track-tread, self-propelled rotary cultivator of claim 1, wherein: The rotary tillage device (6) is installed at the rear of the chassis system (1) via a suspension frame (24). The suspension frame (24) is installed at the rear of the chassis system (1) via two clamps, and two hydraulic cylinders are installed on it to control the lifting and lowering of the rotary tillage device (6).

10. The track-tread, self-propelled rotary cultivator of claim 1, wherein: A radiator (15) is also provided on one side of the engine (13).

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