Crawler rotary cultivator walking chassis structure with enhanced stability
By employing a low center of gravity design, increased track width, and a double-layer toothed drive wheel and support roller distribution, the stability and passability issues of tracked rotary tillers in complex terrain have been resolved, resulting in higher operational safety and efficiency.
Patent Information
- Application Number
- CN202520619003.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-03
- Publication Date
- 2026-07-24
- Estimated Expiration
- 2035-04-03
AI Technical Summary
The existing tracked rotary tiller chassis structure lacks stability in complex terrain, is prone to tipping over, and has poor passability due to excessive ground pressure.
The chassis features a low center of gravity design, increasing the track width to over 350mm. A double-tooth design is used between the drive wheels and the tracks, with the support rollers evenly distributed in the middle of the chassis. The weight distribution and track tension are optimized through adjustable brackets and guide wheel structures.
It improves the stability and passability of tracked rotary tillers on complex terrain, reduces the risk of tipping over, and ensures the safety and efficiency of operations.
Smart Images
Figure CN224546134U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of tracked rotary tiller technology, specifically to a tracked rotary tiller chassis structure with enhanced stability. Background Technology
[0002] Tracked rotary tillers, as efficient and multifunctional agricultural machinery, play a vital role in modern agricultural production. They use the tractor's power take-off shaft to drive a bladed roller, enabling various agricultural operations such as tilling and harrowing. Tracked rotary tillers are widely used due to their powerful soil-breaking ability, the ability to create a smooth surface after tilling, and the flexibility of choosing different sizes to meet various needs.
[0003] Existing tracked rotary tiller chassis structures have certain limitations under specific conditions. For example, when operating on steep slopes or slippery ground, the high center of gravity and insufficient track contact area can increase the risk of the machine tipping over, affecting operational safety. In addition, traditional tracked rotary tiller chassis designs have not adequately considered how to effectively distribute the machine's weight in extreme terrain to ensure optimal ground pressure and stability. These issues limit the application range and operating efficiency of existing tracked rotary tillers in complex terrain. Utility Model Content
[0004] The purpose of this utility model is to provide a tracked rotary tiller chassis structure with enhanced stability, so as to solve the problems mentioned in the background art of insufficient stability, easy rollover, and poor passability caused by excessive ground pressure when the current tracked rotary tiller is operating in complex terrain.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a tracked rotary tiller chassis structure with enhanced stability, comprising a frame, drive wheels, support rollers, track rollers, guide wheels, tracks, and a support beam frame. The frame adopts a low center of gravity design and has a drive wheel installed at its front end. A guide wheel is installed at the rear end of the frame. Multiple support rollers are evenly distributed in the middle part of the frame, and the support rollers are connected above the adjustable brackets with symmetrically arranged track rollers. The tracks wrap around the drive wheels, support rollers, track rollers, and guide wheels to form a closed loop. The meshing between the drive wheels and the tracks adopts a double-tooth design. The guide wheels are connected to the rear end of the frame through a pair of symmetrically arranged guide arms. The top of the rear end of the frame is provided with a guide seat that cooperates with the guide arm structure. An adjusting screw is inserted through an adjusting screw seat at the inner end of the guide seat, and the outer end of the adjusting screw is connected to a positioning hole provided at the inner end of the guide arm.
[0006] Preferably, the outer layer of the double-layer tooth profile of the drive wheel is made of high-hardness wear-resistant material, the inner layer is made of high-strength alloy steel, and the tooth profile of the drive wheel has a trapezoidal structure with a tooth tip width of 15mm, a tooth root width of 25mm, a tooth height of 20mm, and a tooth side inclination angle of 15 degrees.
[0007] Preferably, the adjustable bracket is a telescopic structure consisting of an upper bracket, a connecting frame, and a lower bracket, and a positioning stud is inserted through a screw sleeve on the outer wall of the lower bracket of the adjustable bracket, and a positioning interface that matches the top structure of the positioning stud is welded and fixed on the outer wall of the upper bracket of the adjustable bracket.
[0008] Preferably, there are ten support rollers, evenly distributed on both sides of the frame, and each support roller is connected to the frame via an independent suspension frame, and the independent suspension frame is equipped with a spring shock absorber.
[0009] Compared with existing technologies, the beneficial effects of this utility model are as follows: the tracked rotary tiller chassis structure with enhanced stability effectively improves the machine's stability and passability on complex terrain, reduces the risk of rollover, and ensures the safety and efficiency of operation. This tracked rotary tiller chassis structure with enhanced stability achieves this through a low center of gravity design of the frame, increasing the track width to over 350mm to increase the ground contact area, a double-layer toothed design between the drive wheels and tracks for more stable meshing, and a design where the support rollers are evenly distributed in the middle of the frame. These combined effects not only enhance the machine's grip and stability on slippery or steep terrain, but also optimize weight distribution, reduce ground pressure, and further reduce the possibility of rollover. Attached Figure Description
[0010] Figure 1 This is a schematic diagram of the walking chassis structure of a tracked rotary tiller with enhanced stability according to the present invention.
[0011] Figure 2 This is a schematic diagram of an adjustable support structure for a tracked rotary tiller chassis with enhanced stability, according to the present invention.
[0012] Figure 3 This is a schematic diagram of the connection structure between the support rollers and the frame of a tracked rotary tiller chassis structure with enhanced stability, according to this utility model.
[0013] In the diagram: 1. Chassis; 2. Drive wheel; 3. Track roller; 4. Track support roller; 5. Guide wheel; 6. Track; 7. Guide arm; 8. Guide seat; 9. Adjusting screw; 10. Adjustable bracket; 11. Support beam; 12. Positioning stud; 13. Positioning interface; 14. Independent suspension frame; 15. Spring shock absorber. Detailed Implementation
[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0015] Please see Figure 1-3This utility model provides a technical solution: a tracked rotary tiller chassis structure with enhanced stability, including a frame 1, drive wheels 2, support rollers 3, track rollers 4, guide wheels 5, tracks 6, and a support beam 11. The support beam 11 is horizontally fixed above the frame 1 by two vertically distributed support beams. The support beam 11 is used to connect and install the frame 1 with the upper structure, such as the cab, tool mounting point, or other equipment requiring support. The frame 1 adopts a low center of gravity design and has drive wheels 2 installed at its front end. A drive mechanism is provided on one side of the drive wheels 2. Guide wheels 5 are installed at the rear end of the frame 1. Multiple support rollers 3 are evenly distributed in the middle part of the frame 1, and track rollers 4 are symmetrically arranged above the support rollers 3 via adjustable brackets 10. The tracks 6 surround the drive wheels. The drive wheel 2, track roller 3, track support roller 4, and guide roller 5 form a closed loop. The track 6 is wider than 350mm to increase the ground contact area. The meshing between the drive wheel 2 and the track 6 uses a double-tooth design. This chassis 1 features a low center of gravity design with the drive wheel 2 mounted at the front and the guide roller 5 at the rear. Multiple track rollers 3 are evenly distributed in the middle, enabling the entire chassis structure to maintain good stability and passability on complex terrain. Simultaneously, the closed loop formed by the track 6 (wider than 350mm) around the drive wheel 2, track roller 3, track support roller 4, and guide roller 5 effectively increases the ground contact area, reduces the ground pressure, and further enhances the machine's grip on slippery or steep terrain. In addition to stability, the double-layer toothed design between the drive wheel 2 and the track 6 ensures a more stable meshing, reduces the possibility of track 6 slippage, and improves power transmission efficiency. This not only solves the problem of increased risk of machine rollover caused by the high center of gravity and insufficient track contact area in existing technologies, but also greatly improves operational safety and work efficiency. This allows the tracked rotary tiller to operate efficiently in more complex terrain conditions, expanding its application range and ensuring both safety and efficiency. The outer layer of the double-layer toothed design of the drive wheel 2 is made of high-hardness wear-resistant material, and the inner layer is made of high-strength alloy steel. Furthermore, the tooth cross-section of the drive wheel 2 is trapezoidal, with a tooth top width of 15mm, a tooth bottom width of 25mm, a tooth height of 20mm, and a tooth side inclination angle of 15 degrees. The double-layer toothed outer layer of the drive wheel 2 effectively enhances the wear resistance between it and the track 6, reducing the wear rate during long-term use. Simultaneously, the inner layer ensures the overall strength and durability of the drive wheel 2. The trapezoidal cross-section of the drive wheel 2 ensures a more stable meshing with the track 6, improving power transmission efficiency and reducing slippage. This not only enhances the traction and stability of the track 6 under various terrain conditions but also further improves the overall operational stability and reliability of the machine by optimizing the fit between the drive wheel 2 and the track 6. Especially in complex or harsh working environments, it effectively reduces the failure rate. The guide wheel 5 is connected to the rear end of the frame 1 via a pair of symmetrically arranged guide arms 7. The connection between the guide arms 7 and the guide wheel 5 is achieved through a tight bearing.Furthermore, a guide seat 8, which mates with the guide arm 7, is welded and fixed to the top of the rear end of the chassis 1. This structure not only ensures that the guide wheel 5 can rotate flexibly to adapt to changes in different terrains, but also enhances the stability and responsiveness of the entire walking system through the close cooperation between the guide arm 7 and the guide seat 8. Specifically, when the tracked rotary tiller is traveling on complex terrain, the guide wheel 5 can adjust its direction in a timely manner according to the ground conditions. These adjustments are fed back to the chassis 1 through the guide arm 7, while the guide seat 8 provides necessary support and restraint to prevent excessive deviation or swaying. This linkage mechanism effectively improves the control accuracy and stability of the entire machine under various operating conditions, reduces the risk of loss of directional control due to terrain changes, and further ensures operational safety and equipment durability. The guide seat 8 has an adjusting screw 9 inserted through an adjusting screw seat at its inner end, and the outer end of the adjusting screw 9 is connected to a positioning hole at the inner end of the guide arm 7. This structure allows the position of the guide arm 7 to be changed by rotating the adjusting screw 9, thereby adjusting the position of the guide wheel 5 relative to the track 6, achieving fine adjustment of the track 6 tension. Appropriate tension ensures that the track 6 is neither too loose, causing derailment or slippage, nor too tight, causing additional wear or increased power loss. The adjustable bracket 10 is a telescopic structure composed of an upper bracket, a connecting frame, and a lower bracket. The upper and lower ends of the connecting frame are movably stored inside the corresponding sides of the upper and lower brackets. A positioning stud 12 is inserted through a screw sleeve on the outer wall of the lower bracket of the adjustable bracket 10, and a positioning stud 12 is welded to the outer wall of the upper bracket of the adjustable bracket 10. A positioning interface 13, which matches the top structure of the positioning stud 12, is fixedly attached to the adjustable bracket 10. This structure allows for precise adjustment of the height of the track roller 4 by rotating the positioning stud 12 so that its top aligns with the positioning interface 13, thereby changing the position of the upper bracket relative to the lower bracket. When the positioning stud 12 is adjusted to its correct position, its top aligns with the positioning interface 13, ensuring the stability of the entire adjustable bracket 10 in the set position. This not only ensures that the track roller 4 maintains its optimal working position and optimizes the tension and support effect of the track 6, but also improves the stability and passability of the entire machine on complex terrain. Furthermore, this easily adjustable design facilitates daily inspection and maintenance by the operator, further enhancing the equipment's reliability. For reliability and ease of use, ten support rollers 3 are evenly distributed on both sides of the frame 1. Each support roller 3 is connected to the frame 1 via an independent suspension frame 14. The independent suspension frame 14 has a U-shaped structure with its opening facing the ground. A spring shock absorber 15 is installed inside the independent suspension frame 14. The bottom end of the spring shock absorber 15 is connected to the center hole of the wheel hub passing through the support roller 3 via a connecting shaft. With this structure, when the machine travels on rough or uneven ground, the support roller 3 will move up and down according to the specific ground conditions. The independent suspension frame 14 and the spring shock absorber 15 work together to effectively absorb and buffer the impact force from the ground, reducing the vibration transmitted to the frame 1 and the operating platform, thereby protecting the machine's critical components from damage and improving operator comfort.Furthermore, this ensures that track 6 maintains good contact with the ground throughout the entire journey, enhancing the overall traction and stability of the machine and reducing the risk of track 6 derailing.
[0016] Working Principle: When using the tracked rotary tiller chassis structure with enhanced stability, the drive mechanism of the drive wheel 2 is first activated. Power transmission is provided through the double-layer toothed design between the drive wheel 2 and the track 6, causing the track 6 to begin running in a closed loop formed by the drive wheel 2, track rollers 3, carrier rollers 4, and guide rollers 5. As the track 6 rotates, the track rollers 3 are evenly distributed on both sides of the frame 1 and connected to the frame 1 via independent suspension brackets 14. These track rollers 3 move up and down according to ground conditions to adapt to terrain changes. Spring shock absorbers 15 work together to absorb impact forces from the ground, reducing vibration transmission to the frame 1 and operating platform. When the guide wheel 5 can be adjusted in direction through the tight cooperation between the guide arm 7 and the guide seat 8, that is, when it is necessary to adjust the tension of the track 6, the operator can change the position of the guide arm 7 by rotating the adjusting screw 9, thereby adjusting the position of the guide wheel 5 relative to the track 6, and realizing fine adjustment of the tension of the track 6. In addition, when it is necessary to precisely adjust the height of the track roller 4, the positioning stud 12 can be rotated so that its top end is inserted into the positioning interface 13 that matches its structure, ensuring that the track roller 4 is in the optimal working position. Throughout the process, the tracked rotary tiller chassis enables the tracked rotary tiller to work efficiently on various complex terrains, thereby completing a series of tasks.
[0017] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A tracked rotary tiller chassis structure with enhanced stability, comprising a frame (1), drive wheels (2), track rollers (3), track carrier rollers (4), guide wheels (5), tracks (6), and a support beam frame (11), characterized in that: The frame (1) adopts a low center of gravity design and has a drive wheel (2) installed at its front end. The rear end of the frame (1) is equipped with a guide wheel (5). Multiple support rollers (3) are evenly distributed in the middle part of the frame (1). The support rollers (3) are symmetrically provided with track rollers (4) above the support rollers (3) through adjustable brackets (10). The track (6) is surrounded by the drive wheel (2), support rollers (3), track rollers (4), and guide rollers (5) to form a closed loop. The meshing between the drive wheel (2) and the track (6) adopts a double-tooth design. The guide wheel (5) is connected to the rear end of the frame (1) through a pair of symmetrically arranged guide arms (7). The top of the rear end of the frame (1) is provided with a guide seat (8) that cooperates with the structure of the guide arm (7). The inner end of the guide seat (8) is inserted with an adjusting screw (9) through an adjusting screw seat. The outer end of the adjusting screw (9) is connected to the positioning hole provided at the inner end of the guide arm (7).
2. The tracked rotary tiller chassis structure with enhanced stability according to claim 1, characterized in that: The outer layer of the double-toothed drive wheel (2) is made of high-hardness wear-resistant material, and the inner layer is made of high-strength alloy steel. The tooth cross section of the drive wheel (2) is a trapezoidal structure with a tooth top width of 15mm, a tooth bottom width of 25mm, a tooth height of 20mm, and a tooth side inclination angle of 15 degrees.
3. The tracked rotary tiller chassis structure with enhanced stability according to claim 1, characterized in that: The adjustable bracket (10) is a telescopic structure consisting of an upper bracket, a connecting frame and a lower bracket. A positioning stud (12) is inserted through a screw sleeve on the outer wall of the lower bracket of the adjustable bracket (10), and a positioning interface (13) that matches the top structure of the positioning stud (12) is welded and fixed on the outer wall of the upper bracket of the adjustable bracket (10).
4. The tracked rotary tiller chassis structure with enhanced stability according to claim 1, characterized in that: The number of the support rollers (3) is ten, which are evenly distributed on both sides of the frame (1). Each of the support rollers (3) is connected to the frame (1) through an independent suspension frame (14), and the independent suspension frame (14) is equipped with a spring shock absorber (15).