small tillers

Abstract

This invention provides a compact tiller that eliminates the drive box in the middle of the transmission shaft, solving the problem of conventional compact tillers being unable to cultivate the intermediate area. [Solution] The small tiller includes a casing 10, the casing is equipped with a battery 11, and double arms 21 and 22 are provided at the front end of the casing. A drive mechanism is installed inside the first arm 21 of the double arms, and the drive mechanism is electrically connected to the battery. A connecting block 23 is provided at the end of the second arm 22 of the double arms, and the end of the transmission shaft 40 is located inside the connecting block. The transmission shaft is provided between the two ends of the double arms, and by arranging the drive mechanism and the transmission mechanism on one side of the transmission shaft, the drive box in the middle of the transmission shaft is eliminated.

Description

Technical Field

[0001] The present invention relates to the technical field of agricultural machinery, and specifically to a type of small tiller.

Background Art

[0002] The power source of conventional small tillers has been mainly internal combustion engines. However, with the development of technology, electric small tillers have also emerged. For example, the small tiller disclosed in the publication number CN309588390S of the People's Republic of China includes a main casing, a handle and a battery provided on the upper part of the casing, and a drive box provided on the lower part of the casing. Inside the box, a motor and a reduction mechanism are installed.

[0003] However, in this structure, the drive box is arranged in the middle of the transmission shaft, and the blades are installed at both ends of the transmission shaft. Therefore, there is a problem that the middle area cannot be cultivated, which affects the tilling effect. To solve this problem, the present invention provides a new small tiller.

Summary of the Invention

[0004] In order to solve the problems raised in the above background art, the present utility model provides a type of small tiller.

Means for Solving the Problems

[0005] To achieve the above object, the present utility model provides the following technical solution: A type of small tiller includes a casing, on which a battery is provided, a double arm is provided at the front end of the casing, a drive mechanism is provided inside the first arm of the double arm, the drive mechanism and the battery are electrically connected, a first bevel gear is provided on the output shaft of the drive mechanism, a transmission shaft is provided between the two ends of the double arm, and a second bevel gear meshing with the first bevel gear is provided at the first end of the transmission shaft.

[0006] Preferably, a connecting block is provided at the end of the second arm of the double arm, the end of the transmission shaft is installed inside the connecting block, the connecting block is provided with a slide groove, the end of the second arm of the double arm is provided with a slider that engages with the slide groove, one side of the slide groove is provided with a first through hole and the other side is provided with a screw thread, the slider is provided with a second through hole corresponding to the first through hole, a lead screw passes through the first through hole and the second through hole and then connects to the screw thread of the connecting block, a second bearing is provided inside the connecting block and the second end of the transmission shaft is connected to the second bearing.

[0007] Preferably, the transmission shaft includes a first shaft and a second shaft, the second bevel gear is provided on the first shaft, and the first shaft is connected to the first arm of the double arm via a first bearing. The first shaft has a connecting hole at one end, and the second shaft has a projection at one end that engages with the connecting hole, or the first shaft has a projection at one end, and the second shaft has a connecting hole at one end that engages with the projection. The other end of the second shaft is connected to the second bearing.

[0008] Preferably, the transmission shaft is provided with a rotary tilling blade.

[0009] Preferably, the transmission shaft is provided with a brush head. [Effects of the Invention]

[0010] Compared to conventional technology, the beneficial effects of this utility model are as follows:

[0011] This utility model eliminates the need for a drive box in the middle of the transmission shaft, as is the case with conventional small tillers, by installing the drive mechanism and transmission mechanism on one side of the transmission shaft, thus avoiding the problem of being unable to cultivate the intermediate area.

[0012] This utility model allows a small tiller to quickly switch from tilling to ground cleaning by replacing the tilling blade with a brush, significantly expanding the application scenarios of the equipment and reducing the equipment investment costs for agricultural production and horticultural care by eliminating the need to install additional dedicated cleaning equipment. [Brief explanation of the drawing]

[0013] [Figure 1] This is a schematic diagram showing the structure of the present invention. [Figure 2] This is a cross-sectional view along the axial direction of the lead screw of the present invention. [Figure 3] This is a schematic diagram showing the transmission structure of the present invention. [Figure 4] This is a schematic diagram showing the exploded configuration of the connecting block of the present invention. [Figure 5] This is a schematic diagram showing the exploded view of the second axis of the present invention. [Figure 6] This is a schematic diagram showing the procedure for replacing the second shaft of the present invention. [Figure 7] This is a schematic diagram showing the state after the replacement of the second axis of the present invention.

[0014] As shown in the diagram, the components are: 10. Casing; 11. Battery; 21. First arm; 22. Second arm; 221. Slider; 222. Second through-hole; 23. Connecting block; 231. Slide groove; 232. First through-hole; 233. Screw thread; 24. Lead screw; 241. Handle; 25. Second bearing; 26. First bearing; 30. Drive mechanism; 31. First bevel gear; 40. Transmission shaft; 41. Second bevel gear; 42. First shaft; 421. Connecting hole; 43. Second shaft; 431. Convex block; 51. Rotary blade; 52. Brush head. [Modes for carrying out the invention]

[0015] The technical solutions in embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments. It is clear that the embodiments described are only some, and not all, embodiments of the present invention. All other embodiments that a person skilled in the art can obtain without creative work based on embodiments of the present invention are within the scope of the present invention.

[0016] Example 1 As shown in Figures 1 to 5, a type of small tiller includes a casing 10, on which a battery 11 is mounted, a double arm is provided at the front end of the casing 10, a drive mechanism 30 is provided inside the first arm 21 of the double arm, the drive mechanism 30 and the battery 11 are electrically connected, a first bevel gear 31 is provided on the output shaft of the drive mechanism 30, a transmission shaft 40 is provided between the two ends of the double arm, and a second bevel gear 41 that meshes with the first bevel gear 31 is provided at the first end of the transmission shaft 40. The drive mechanism 30 can employ a combination of a conventional motor and a reduction gear.

[0017] A connecting block 23 is provided at the end of the second arm 22 of the double arm, and the end of the transmission shaft 40 is located inside the connecting block 23. The connecting block 23 is provided with a slide groove 231, and a slider 221 that engages with the slide groove 231 is provided at the end of the second arm 22 of the double arm. A first through hole 232 is provided on one side of the slide groove 231, and a screw thread 233 is provided on the other side. The slider 221 is provided with a second through hole 222 corresponding to the first through hole 232. A lead screw 24 passes through the first through hole 232 and the second through hole 222, and then screws into the screw thread 233 of the connecting block 23. A second bearing 25 is provided inside the connecting block 23, and the second end of the transmission shaft 40 is connected to the second bearing 25. The lead screw 24 is provided with a handle 241 that is easy to turn by hand. The above structure allows the lead screw 24 to be loosened and pulled out of the connecting block 23, and then the connecting block 23 to be slid outwards to remove it, making it easy to disassemble the connecting block 23 and to inspect and repair the transmission shaft 40.

[0018] The transmission shaft 40 includes a first shaft 42 and a second shaft 43, the second bevel gear 41 is mounted on the first shaft 42, and the first shaft 42 is connected to the first arm 21 of the double arm via a first bearing 26.

[0019] A connecting hole 421 is provided at the end of the first shaft 42, and a convex block 431 that combines with the connecting hole 421 is provided at one end of the second shaft 43. Alternatively, a convex block 431 is provided at the end of the first shaft 42, and a connecting hole 421 that combines with the convex block 431 is provided at one end of the second shaft 43. The other end of the second shaft 43 is connected to the second bearing 25. With the above structure, the transmission shaft 40 has a split structure. First, remove the connecting block 23, and then separate the second shaft 43 and the first shaft 42, so that the second shaft 43 can be quickly replaced. Prepare a plurality of second shafts 43, and various cutter heads and other working parts can be attached to the second shaft 43. By replacing the second shaft 43, it is easy to switch between various functions. For example, connect a rotary blade 51 to the second shaft for tilling, or connect a brush head 52 (stainless steel wire or nylon can be used for the brush bristles) to the second shaft to sweep the ground or remove moss.

[0020] Example 2 As shown in FIGS. 6 and 7, this example is different from the first example. It is used to connect a brush head 52 (stainless steel wire or nylon can be used for the brush bristles) to the second shaft 43 to sweep the ground or remove moss. In this example, all structures other than connecting the brush head 52 are the same as those in Example 1.

[0021] It should be noted that the core use of the brush head 52 is for delicate cleaning and treatment of special places, and to complement the functional gap in the non-tillage scenario of the rotary blade. Specifically, in areas such as greenhouse houses, footpaths in orchards, and small paths in gardens, a nylon brush head is used to remove fallen leaves, debris of weeds, dust, etc. remaining on the ground, preventing the accumulation of debris from affecting the growth environment of crops and the smoothness of passage. Also, the nylon brush bristles have a soft texture and do not damage the ground paving or the root systems of crops. On the other hand, in areas where moss and lichens are likely to grow, such as furrows in fields, the edges of houses, and stone-paved roads, it is replaced with a stainless-steel wire brush head. Utilizing its high hardness and abrasion resistance, it can efficiently scrape off the moss, lichens, and stubborn dirt adhering to the surface, and at the same time clean the soil and debris deposited in the gaps, preventing safety hazards caused by the slipperiness of the road surface and also preventing moss from depriving the soil of nutrients. Furthermore, due to the benefits of the split structure of the transmission shaft 40, brush heads 52 of different materials and different densities can be quickly removed and replaced, and it is also possible to flexibly switch to the rotary blade 51 of Example 1, realizing a rapid conversion of the cleaning or tillage function, improving the versatility and scene adaptability of the small tiller, and meeting the diverse needs of small-scale agricultural production and horticultural maintenance.

[0022] In addition, in this text, relative terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and it is not required or implied that there must be such an actual relationship or order between these entities or operations. Also, "including", "contains", or any other variations thereof are intended to be non-exclusive inclusions, whereby a process, method, article, or device containing a series of elements includes not only those elements but also other elements not explicitly listed or elements inherent to the process, method, article, or device.

[0023] Although embodiments of the present invention have already been shown and described, those skilled in the art will understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is limited by the appended claims and equivalents.

Claims

1. A small tiller comprising a casing and a battery provided in the casing, wherein a double arm is provided at the front end of the casing, a drive mechanism is provided in the first arm of the double arm, the drive mechanism is electrically connected to the battery, a first bevel gear is provided on the output shaft of the drive mechanism, a transmission shaft is provided between the two ends of the double arm, and a second bevel gear that meshes with the first bevel gear is provided at the first end of the transmission shaft.

2. A small tiller according to claim 1, wherein a connecting block is provided at the end of the second arm of the double arm, the end of the transmission shaft is positioned inside the connecting block, a slide groove is provided in the connecting block, a slider is provided at the end of the second arm of the double arm that engages with the slide groove, a first through hole is provided on one side of the slide groove and a screw thread is provided on the other side, a second through hole corresponding to the first through hole is provided in the slider, a lead screw passes through the first through hole and the second through hole and then screws into the screw thread of the connecting block, a second bearing is provided inside the connecting block, and the second end of the transmission shaft is connected to the second bearing.

3. In the small tiller according to claim 2, the transmission shaft includes a first shaft and a second shaft, The small tiller according to claim 2, characterized in that the second bevel gear is provided on the first shaft, the first shaft is connected to the first arm of the double arm via a first bearing, a connecting hole is provided at the end of the first shaft, and a convex block that engages with the connecting hole is provided at one end of the second shaft, or a convex block is provided at the end of the first shaft, a connecting hole that engages with the convex block is provided at one end of the second shaft, and the other end of the second shaft is connected to the second bearing.

4. The small tiller according to claim 2, characterized in that a rotary blade is provided on the transmission shaft.

5. The small tiller according to claim 2, characterized in that a brush head is provided on the transmission shaft.

Images