A chain type mini-tiller

Abstract

The utility model provides a kind of chain type mini-tiller belongs to agricultural machinery technical field, for solving the technical problem that existing technology in soil debris invades sprocket chain and leads to transmission jam, wear aggravation. Including: rack shell, engine is set on rack shell upper end, the closed lower end of rack shell and inside is equipped with sprocket accommodating cavity, sprocket accommodating cavity both sides are equipped with shaft hole;Rotary tillage sprocket, rotary tillage sprocket is located in sprocket accommodating cavity, power is transmitted through chain between engine and rotary tillage sprocket, chain is located inside rack shell, the shaft of rotary tillage sprocket is worn out and rotates cooperation from the shaft hole of both sides of rack shell;Still include rotary tillage axle connected to the both ends of rotary tillage sprocket shaft, rotary tillage axle is equipped with rotary tillage blade. It has the technical effect of improving transmission reliability, prolonging equipment service life.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery technology, specifically to a chain-type micro-tiller. Background Technology

[0002] In mountainous agricultural settings, large agricultural machinery struggles to access the work areas due to the undulating terrain, scattered fields, and narrow farm roads. To meet the needs of mountain farming, hand-held or small agricultural tillers have become the primary tools. Their core working components use high-speed rotating blades to break up and till the soil, effectively replacing traditional manual hoeing and significantly improving farming efficiency.

[0003] The blades of existing small agricultural tillers are usually fixed to the rotary tiller shaft, and power transmission relies on a chain drive system driven by an engine. However, the drive chain structure of these machines often adopts an open design, which makes it easy for mud and straw debris to splash into the meshing area of ​​the sprocket and chain during operation, leading to transmission jamming, accelerated wear, or even chain breakage, seriously affecting the reliability and service life of the equipment. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model proposes a chain-type micro-tiller to solve the technical problem of soil debris intruding into the sprockets and chains, causing transmission jamming and accelerated wear.

[0005] The technical solution adopted by this utility model is: a chain-type micro-tiller, comprising: A frame housing, wherein an engine is mounted on the upper end of the frame housing, and the lower end of the frame housing is closed and has a sprocket receiving cavity inside, with shaft holes on both sides of the sprocket receiving cavity; A rotary tiller sprocket is located inside the sprocket housing cavity. Power is transmitted between the engine and the rotary tiller sprocket via a chain located inside the frame housing. The shaft of the rotary tiller sprocket passes through shaft holes on both sides of the frame housing and rotates in engagement. It also includes a rotary tillage shaft connected to both ends of the rotary tillage sprocket shaft, and the rotary tillage shaft is equipped with rotary tillage blades.

[0006] Optionally, the shaft hole of the machine frame housing is a stepped hole, with a large hole section on the inner side of the machine frame housing and a small hole section on the outer side of the machine frame housing; in the large hole section, the shaft of the rotary tiller sprocket is engaged with the shaft hole of the machine frame housing through a bearing; in the small hole section, the shaft of the rotary tiller sprocket is engaged with the shaft hole of the machine frame housing through a rotating dynamic seal.

[0007] Optionally, the outer end of the shaft of the rotary tiller is provided with a radial first connecting hole, and the inner end of the rotary tiller shaft is also provided with a first connecting hole. The shaft of the rotary tiller and the inner end of the rotary tiller shaft can be axially inserted and engaged, and their first connecting holes can be aligned and detachably connected into one piece through the first connecting holes.

[0008] Optionally, it also includes a walking wheel, the outer diameter of which is larger than the working cross section of the rotary blades on the rotary tiller shaft; the outer end of the rotary tiller shaft is provided with a radial second connecting hole, and the shaft of the walking wheel is also provided with a second connecting hole, the outer end of the rotary tiller shaft and the shaft of the walking wheel can be axially inserted and engaged, and their second connecting holes can be aligned and detachably connected as one unit through the second connecting holes.

[0009] Optionally, the bottom of the frame housing is filled with oil, and the oil level covers the bottom of the rotary tiller sprocket; and / or, the frame housing is made of aluminum.

[0010] Optionally, it also includes a plow, which includes two plow blades connected in a "V" shape, with the tips of the plow blades facing the front of the micro tiller and the rear ends of the plow blades fixed to both sides of the frame housing.

[0011] Optionally, it also includes a mudguard that covers the top and rear of the rotary tiller shaft, and the rear portion of the mudguard is capable of swinging back and forth relative to the tiller body.

[0012] Optionally, a tail rod is provided on the rear side of the frame housing, and a support rod is slidably connected to the tail rod. The sliding connection point between the tail rod and the support rod can be locked or released to slide or fix them relative to each other.

[0013] Optionally, the free end of the support rod is also provided with a walking wheel.

[0014] Optionally, it also includes an operating handle connected to the main body of the micro-tiller, the operating handle being located at the rear end of the micro-tiller.

[0015] As can be seen from the above technical solution, the beneficial technical effects of this utility model are as follows: This chain-driven mini-tiller effectively prevents soil debris from intruding into the sprocket and chain area by placing the sprocket housing at the lower end of the enclosed frame housing and placing the chain inside the frame housing. This solves the problems of transmission jamming and accelerated wear caused by soil debris intrusion in existing technologies, making power transmission smoother and improving transmission reliability. At the same time, it reduces component wear caused by soil debris, lowers the equipment failure rate, extends the overall service life of the equipment, and improves the working efficiency and stability of the mini-tiller. Attached Figure Description

[0016] 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. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0017] Figure 1This is a three-dimensional schematic diagram of the front side.

[0018] Figure 2 This is a side-view 3D diagram.

[0019] Figure 3 This is a schematic diagram showing the state without mudguards and walking wheels.

[0020] Figure 4 This is a schematic diagram of the machine frame and plow.

[0021] Figure 5 This is a schematic diagram of the overall cross-section.

[0022] Figure 6 This is a cross-sectional view of the frame shell.

[0023] Figure 7 This is a schematic diagram showing the connection between the rotary tiller shaft and the machine frame.

[0024] Figure 8 for Figure 7 A magnified view of a portion of point A in the middle.

[0025] Reference numerals: 1. Frame housing; 11. Sprocket housing; 12. Shaft hole; 13. Oil; 14. Tail rod; 15. Support rod; 16. Operating handle; 2. Engine; 3. Rotary tillage sprocket; 31. First connecting hole; 4. Rotary tillage shaft; 41. Second connecting hole; 5. Walking wheel; 6. Plow; 7. Mudguard. Detailed Implementation

[0026] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0027] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.

[0028] A chain-driven micro-tiller, please refer to the appendix. Figures 1-3 One possible implementation method is as follows: The frame housing 1 has an engine 2 (with an oil tank, reducer, etc.) installed at the upper end of the frame housing 1. The lower end of the frame housing 1 is closed and has a sprocket receiving cavity 11 inside. The sprocket receiving cavity 11 has shaft holes 12 on both sides. The frame housing 1 can be in the form of two halves snapped together. Rotary sprocket 3 is located in sprocket housing cavity 11. Power is transmitted between engine 2 and rotary sprocket 3 through chain. The chain is located inside frame housing 1. The shaft of rotary sprocket 3 passes through shaft holes 12 on both sides of frame housing 1 and rotates to engage. It also includes a rotary tillage shaft 4 connected to both ends of the rotary tillage sprocket 3 shaft. The rotary tillage shaft 4 is equipped with rotary tillage blades. This content is existing technology and is not the core of this solution.

[0029] Specifically, the shaft hole 12 of the frame housing 1 is a stepped hole, with a larger section located inside the frame housing 1 and a smaller section located outside the frame housing 1. In the larger section, the shaft of the rotary tiller sprocket 3 is fitted with the shaft hole 12 of the frame housing 1 via a bearing; in the smaller section, the shaft of the rotary tiller sprocket 3 is fitted with the shaft hole 12 of the frame housing 1 via a rotary dynamic seal. The rotary dynamic seal fit is also existing technology and is widely used in fields such as oil pumps; relevant technical manuals can be consulted.

[0030] Further, see appendix. Figure 6 The bottom of the frame housing 1 is filled with oil 13, and the liquid level covers the bottom of the rotary tiller sprocket 3; and / or, the frame housing 1 is made of aluminum.

[0031] In the above embodiment, an engine with an oil tank and reducer is mounted on the upper end of the frame housing, while the lower end is closed and equipped with a sprocket housing cavity and a shaft hole. The rotary tiller sprocket is placed inside the sprocket housing cavity and connected to the engine via a chain. The chain is located inside the frame housing, effectively preventing soil debris intrusion and reducing transmission jamming and wear. The shaft hole design of the frame housing balances flexible rotation with a sealed fit, preventing internal lubricant leakage and external impurities from entering. This sealing method is maturely used in fields such as oil pumps and offers high reliability. The bottom of the frame housing is filled with oil that overflows the bottom of the rotary tiller sprocket, fully lubricating the chain and sprocket, reducing wear, and improving transmission efficiency. Simultaneously, the frame housing is made of aluminum, which has advantages such as light weight, high strength, and corrosion resistance, facilitating equipment movement and operation, and extending service life. Overall, this chain-driven micro-tiller, through these designs, effectively solves the problem of soil debris intrusion, improves transmission reliability, reduces component wear, extends equipment life, and enhances the micro-tiller's operating performance and stability.

[0032] In one possible implementation, see Appendix Figure 7 and Figure 8The outer end of the rotary sprocket 3 has a radial first connecting hole 31, and the inner end of the rotary shaft 4 also has a first connecting hole 31. The shaft of the rotary sprocket 3 and the inner end of the rotary shaft 4 can be axially inserted (at least one end is tubular), and their first connecting holes 31 can be aligned and detachably connected as one unit through the first connecting holes 31. Specifically, in one possible way, the first connecting hole 31 is a through hole, and the screw passes through both, with nuts tightened at both ends; in another way, the first connecting hole 31 of the rotary sprocket 3 shaft is threaded, and the first connecting hole 31 of the rotary shaft 4 is a through hole, with a bolt passed through the rotary shaft 4 and screwed into the rotary sprocket 3 shaft. This design facilitates quick replacement of rotary blades of different specifications or types to adapt to diverse tillage needs, improves the versatility and flexibility of the equipment, and allows the chain-type micro-tiller to function efficiently in different operating scenarios.

[0033] In one possible implementation, see Appendix Figure 5 It also includes a walking wheel 5, the outer diameter of which is larger than the working cross section of the rotary blades on the rotary shaft 4; the outer end of the rotary shaft 4 is provided with a radial second connecting hole 41, and the shaft of the walking wheel 5 is also provided with a second connecting hole 41. The outer end of the rotary shaft 4 and the shaft of the walking wheel 5 can be axially inserted and engaged, and their respective second connecting holes 41 can be aligned and detachably connected as one unit through the second connecting holes 41.

[0034] In the above embodiments, a practical structure called a walking wheel is added to the chain-driven micro-tiller. The outer diameter of the walking wheel is larger than the working cross-section of the rotary blades on the rotary shaft, which effectively prevents the rotary blades from contacting the ground. Both the outer end of the rotary shaft and the shaft of the walking wheel are provided with radial second connecting holes. The two can be axially inserted and aligned, and connected as a whole in a detachable manner. The connection method can refer to the screw and nut or bolt threaded engagement mentioned above. This design allows the walking wheel to be quickly installed when not in a tilling state, facilitating the normal pushing and moving of the micro-tiller. When tilling, it can be easily disassembled without affecting the rotary tilling operation, greatly improving the convenience of using the equipment.

[0035] In one possible implementation, see Appendix Figure 3 The system also includes a plow 6, which consists of two plow blades connected in a "V" shape, with the tips of the blades facing forward and the rear ends fixed to both sides of the frame housing 1. This unique design enables ditching, creating more favorable conditions for subsequent tillage operations and significantly improving the efficiency and quality of rotary tillage. Furthermore, the secure connection between the plow and the frame housing is robust and reliable, preventing loosening or displacement during operation and ensuring the stability of ditching and soil breaking effects. Simultaneously, this simple and easy-to-manufacture structure, while low in cost, delivers a significant improvement in tillage performance, greatly enhancing the practicality and applicability of the chain-driven tiller and better meeting the diverse tillage needs of different users.

[0036] In one possible implementation, see Appendix Figure 2 It also includes a mudguard 7, which covers the top and rear of the rotary tiller shaft 4, and the rear part of the mudguard 7 can swing back and forth relative to the main body of the micro tiller.

[0037] In one possible implementation, see Appendix Figure 5 A tail rod 14 is located at the rear of the frame housing 1. A support rod 15 is slidably connected to the tail rod 14. The sliding connection point between the tail rod 14 and the support rod 15 can be locked or released for relative sliding or fixing. Threaded holes can be provided on the tail rod 14, and larger-diameter smooth holes can be arrayed on the support rod 15. Bolts are passed through the support rod 15 and screwed onto the tail rod 14, and the tightness can be adjusted by turning the bolts. An auxiliary wheel 5 is also provided at the free end of the support rod 15. An operating handle 16 is also included, connected to the main body of the micro-tiller, and located at the rear of the micro-tiller.

[0038] In the above embodiments, this design allows for flexible adjustment of the position of the walking wheels, enabling the overall balance and support of the micro-tiller to be adjusted according to different operating scenarios and user needs. This facilitates pushing the machine when not in use and allows it to adapt to complex terrain to a certain extent, improving the flexibility and stability of the equipment and enhancing the user experience.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this 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. 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, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A chain-type micro-tiller, characterized in that, include: A frame housing (1) is provided with an engine (2) at its upper end. The lower end of the frame housing (1) is closed and has a sprocket receiving cavity (11) inside. Shaft holes (12) are provided on both sides of the sprocket receiving cavity (11). Rotary sprocket (3), the rotary sprocket (3) is located in the sprocket receiving cavity (11), the engine (2) and the rotary sprocket (3) transmit power through a chain, the chain is located inside the frame shell (1), the shaft of the rotary sprocket (3) passes through the shaft holes (12) on both sides of the frame shell (1) and rotates in cooperation; It also includes a rotary tillage shaft (4) connected to both ends of the rotary tillage sprocket (3) shaft, and the rotary tillage shaft (4) is provided with rotary tillage blades.

2. The chain-type micro-tiller as described in claim 1, characterized in that: The shaft hole (12) of the frame housing (1) is a stepped hole, with a large hole section on the inside side of the frame housing (1) and a small hole section on the outside side of the frame housing (1); In the large hole section, the shaft of the rotary tillage sprocket (3) is engaged with the shaft hole (12) of the frame housing (1) through a bearing; In the small hole section, the shaft of the rotary tillage sprocket (3) is engaged with the shaft hole (12) of the frame housing (1) by a rotating dynamic seal.

3. A chain-type micro-tiller as described in claim 1, characterized in that: The outer end of the shaft of the rotary sprocket (3) is provided with a radial first connecting hole (31), and the inner end of the rotary shaft (4) is also provided with a first connecting hole (31). The shaft of the rotary sprocket (3) and the inner end of the rotary shaft (4) can be axially inserted and engaged, and their first connecting holes (31) can be aligned and detachably connected into one piece through the first connecting hole (31).

4. A chain-type micro-tiller as described in claim 1, characterized in that: It also includes a walking wheel (5), the outer diameter of which is larger than the working cross section of the rotary blades on the rotary shaft (4); The outer end of the rotary tillage shaft (4) is provided with a radial second connecting hole (41), and the shaft of the walking wheel (5) is also provided with a second connecting hole (41). The outer end of the rotary tillage shaft (4) and the shaft of the walking wheel (5) can be axially inserted and engaged, and their second connecting holes (41) can be aligned and detachably connected as one unit through the second connecting hole (41).

5. A chain-type micro-tiller as described in claim 1, characterized in that: The bottom of the frame housing (1) is filled with oil (13), and the liquid level covers the bottom of the rotary tiller sprocket (3); And / or, the frame housing (1) is made of aluminum.

6. A chain-type micro-tiller as described in claim 1, characterized in that: It also includes a plow (6), which includes two plow blades connected in a "V" shape, with the tips of the plow blades facing the front of the micro tiller and the rear ends of the plow blades fixed to both sides of the frame shell (1).

7. A chain-type micro-tiller as described in claim 1, characterized in that: It also includes a mudguard (7) that covers the top and rear of the rotary tiller shaft (4), and the rear part of the mudguard (7) can swing back and forth relative to the tiller body.

8. A chain-type micro-tiller as described in claim 1, characterized in that: A tail rod (14) is provided on the rear side of the frame housing (1), and a support rod (15) is slidably connected to the tail rod (14). The sliding connection point of the tail rod (14) and the support rod (15) can be locked or released to slide or fix relative to each other.

9. A chain-type micro-tiller as described in claim 8, characterized in that: The free end of the support rod (15) is also provided with a walking wheel (5).

10. A chain-type micro-tiller as described in claim 1, characterized in that: It also includes an operating handle (16) connected to the main body of the micro-tiller, which is located at the rear end of the micro-tiller.

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