Rotary cultivator

Abstract

The utility model provides a rotary cultivator which comprises a machine shell, a handle assembly, a driving motor and a transmission shaft. The handle assembly is fixed to the rear side of the machine shell, the driving motor is fixed to the interior of the machine shell, the transmission shaft transversely penetrates through the bottom of the machine shell and is rotationally connected with the machine shell through two bearings which are in bilateral symmetry, and the two ends of the transmission shaft are each fixedly provided with a plurality of cultivation cutter heads which are distributed in the axial direction of the transmission shaft at intervals; a driving gear is coaxially fixed on an output shaft of the driving motor, a driven gear is coaxially sleeved and fixed on the transmission shaft, a reduction gear set is arranged in the shell, an input end of the reduction gear set is meshed with the driving gear and is in transmission connection with the driving gear, and an output end of the reduction gear set is meshed with the driven gear and is in transmission connection with the driven gear; the power transmission device has the advantage of being stable in power transmission, that is, when the cultivation cutter is subjected to a large load, the driving motor can keep a reliable driving state for the cultivation cutter, and then the reliability of the cultivation cutter for soil cultivation can be ensured.

Description

Technical Field

[0001] This utility model relates to the field of soil tillage machinery technology, and more specifically, to a rotary tiller. Background Technology

[0002] A rotary tiller is a device used for cultivating soil. Currently, rotary tillers on the market mainly consist of a housing, a handle assembly, a drive motor, and a drive shaft. The handle assembly is fixed to the rear of the housing, the drive motor is fixed inside the housing, and the drive shaft runs horizontally through the bottom of the housing and is rotatably connected to the housing via two symmetrical bearings. Several tilling blades are fixed at both ends of the drive shaft, spaced apart along its axial direction. The drive shaft is also connected to the output shaft of the drive motor. When the drive motor rotates the drive shaft, causing the drive shaft to rotate the tilling blades, the tilling blades cultivate the soil. However, in existing rotary tiller structures, the drive shaft is rotatably connected to the output shaft of the drive motor via a pulley and a drive belt. This can lead to slippage between the drive belt and pulley when the tilling blades are under heavy load, resulting in poor reliability of the drive motor's connection to the drive shaft and tilling blades. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a rotary tiller with the advantage of stable power transmission, that is, even when the tillage disc is subjected to a large load, the drive motor can maintain a reliable driving state for the tillage disc, thereby ensuring the reliability of the tillage disc in tilling the soil.

[0004] This utility model provides a rotary tiller, including a housing, a handle assembly, a drive motor, and a transmission shaft. The handle assembly is fixed to the rear side of the housing, the drive motor is fixed inside the housing, and the transmission shaft passes laterally through the bottom of the housing and is rotatably connected to the housing through two left-right symmetrical bearings. Several tillage blades are fixed at both ends of the transmission shaft and spaced apart along the axial direction of the transmission shaft. A drive gear is coaxially fixed on the output shaft of the drive motor, and a driven gear is coaxially sleeved on the transmission shaft. A reduction gear set is provided inside the housing. The input end of the reduction gear set meshes with and is connected to the drive gear, and the output end of the reduction gear set meshes with and is connected to the driven gear.

[0005] By adopting the above-described structure, this invention features a stable power transmission because the drive shaft is connected to the output shaft of the drive motor via a driven gear, a reduction gear set, and a driving gear. This ensures that even when the tillage disc is subjected to a large load, the drive motor can maintain a reliable driving state for the tillage disc, thereby ensuring the reliability of the tillage disc in tilling the soil. Furthermore, due to the effect of the reduction gear set, the drive shaft and the tillage disc can have greater torque, further improving the reliability of the tillage disc in tilling the soil.

[0006] In one possible implementation, the reduction gear set includes multiple progressively connected reduction compound gears. Each reduction compound gear is rotatably connected to the housing. Each reduction compound gear includes a large gear section and a small gear section arranged coaxially. The large gear section of the first reduction compound gear meshes with the driving gear, and the small gear section of the last reduction compound gear meshes with the driven gear. The large gear sections of each subsequent reduction compound gear mesh with the small gear sections of the previous reduction compound gear. By using this reduction gear set, when power is transmitted from the previous reduction compound gear to the next reduction compound gear, the rotational speed can be reduced and the torque increased. This allows the drive shaft and the tiller disc to have greater torque, enabling the tiller disc to reliably till the soil.

[0007] In one possible implementation, each reduction compound gear is coaxially fitted with a support shaft, both ends of which are connected to the housing. Each reduction compound gear is rotatably connected to its corresponding support shaft. With this structure, each support shaft can support the reduction compound gear at its corresponding position, thus ensuring the reliability of the reduction compound gear's rotation.

[0008] In one possible implementation, two symmetrical metal support plates are fixed inside the housing, with both ends of each support shaft connected to the corresponding support plate. The two metal support plates ensure reliable support for the support shafts, preventing eccentricity and guaranteeing the reliability of the transmission connection between the reduction gear set and the driving and driven gears, as well as the reliability of the transmission connection between multiple reduction compound gears within the reduction gear set. Each support plate is fixed to the inner wall of the housing with several screws.

[0009] In one possible implementation, each support plate is fixed with a support sleeve corresponding to a support shaft, and both ends of each support shaft are coaxially fitted into the two support sleeves at the corresponding positions; by adopting this structure, both ends of each support shaft can be reliably supported on the two support plates.

[0010] In one possible implementation, each support plate is provided with a fixing hole corresponding to the support sleeve on its side. Each support sleeve is inserted into the fixing hole on the corresponding support plate and welded to the support plate. With this structure, when the support sleeve is welded to the support plate, the support sleeve can be pre-inserted into the fixing hole to limit its position with the support plate, thereby positioning the support sleeve and the support plate and facilitating the fixing of the support sleeve and the support plate. Attached Figure Description

[0011] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0012] Figure 2 This is a three-dimensional structural diagram of the present invention after part of the casing has been removed. Detailed Implementation

[0013] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0014] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0015] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0016] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0017] See Figure 1-2 As shown in the figure, this application discloses a rotary tiller, including a housing 1, a handle assembly 2, a drive motor 3, and a transmission shaft 4. The handle assembly 2 is fixed to the rear side of the housing 1, the drive motor 3 is fixed inside the housing 1, the transmission shaft 4 is transversely inserted through the bottom of the housing 1 and rotatably connected to the housing 1 through two left-right symmetrical bearings 5, and several tillage blades 6 are fixed at both ends of the transmission shaft 4 at intervals along the axial direction of the transmission shaft 4; a drive gear 31 is coaxially fixed on the output shaft of the drive motor 3, and a driven gear 41 is coaxially sleeved and fixed on the transmission shaft 4. A reduction gear set is provided inside the housing 1, the input end of the reduction gear set meshes with and is connected to the drive gear 31, and the output end of the reduction gear set meshes with and is connected to the driven gear 41.

[0018] The reduction gear set includes multiple progressively connected reduction compound gears 7. Each reduction compound gear 7 is rotatably connected to the housing 1. Each reduction compound gear 7 includes a large gear portion 71 and a small gear portion 72 arranged coaxially. The large gear portion 71 of the first reduction compound gear 7 meshes with the driving gear 31, and the small gear portion 72 of the last reduction compound gear 7 meshes with the driven gear 41. The large gear portion 71 of each subsequent reduction compound gear 7 meshes with the small gear portion 72 of the previous reduction compound gear 7. By adopting this reduction gear set, when power is transmitted from the previous reduction compound gear to the next reduction compound gear, the rotational speed can be reduced and the torque increased. This allows the drive shaft and the tillage disc to have greater torque, enabling the tillage disc to reliably till the soil.

[0019] Each reduction compound gear 7 is coaxially fitted with a support shaft 8, and both ends of each support shaft 8 are connected to the housing 1. Each reduction compound gear 7 is rotatably connected to the corresponding support shaft 8. With this structure, each support shaft can support the reduction compound gear at the corresponding position, so as to ensure the reliability of the rotation of the reduction compound gear.

[0020] Inside the housing 1, there are two symmetrical support plates 9 made of metal. Both ends of each support shaft 8 are connected to the corresponding support plate 9. By setting up the two support plates made of metal, the support shaft can be reliably supported, thus avoiding eccentricity. This ensures the reliability of the transmission connection between the reduction gear set and the driving and driven gears, as well as the reliability of the transmission connection between multiple reduction compound gears in the reduction gear set. Each support plate is fixed to the inner wall of the housing with several screws.

[0021] Each support plate 9 is fixed with a support sleeve 91 that corresponds one-to-one with the support shaft 8. Both ends of each support shaft 8 are coaxially fitted into the two support sleeves 91 at the corresponding positions. With this structure, both ends of each support shaft can be reliably supported on the two support plates.

[0022] Each support plate 9 is provided with a fixing hole 92 that corresponds one-to-one with the support sleeve 91 on its side. Each support sleeve 91 is inserted into the fixing hole 92 on the corresponding support plate 9 and welded to the support plate 9. With this structure, when the support sleeve is welded to the support plate, the support sleeve can be pre-inserted into the fixing hole to limit the position of the support plate, thereby positioning the support sleeve and the support plate and facilitating the fixing of the support sleeve and the support plate.

[0023] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A rotary tiller, comprising a housing (1), a handle assembly (2), a drive motor (3), and a transmission shaft (4); the handle assembly (2) is fixed to the rear side of the housing (1), the drive motor (3) is fixed inside the housing (1), the transmission shaft (4) is transversely inserted through the bottom of the housing (1) and rotatably connected to the housing (1) by two left-right symmetrical bearings (5), and both ends of the transmission shaft (4) are fixed with a plurality of tillage blades (6) spaced apart along the axial direction of the transmission shaft (4); characterized in that: The drive motor (3) has a drive gear (31) coaxially fixed on its output shaft, and a driven gear (41) is coaxially sleeved and fixed on the transmission shaft (4). The housing (1) is equipped with a reduction gear set. The input end of the reduction gear set meshes with the drive gear (31) and is connected to the drive gear (41) for transmission. The output end of the reduction gear set meshes with the driven gear (41) and is connected to the drive gear (41) for transmission.

2. The rotary cultivator of claim 1, characterized in that: The reduction gear set includes multiple progressively connected reduction compound gears (7). Each reduction compound gear (7) is rotatably connected to the housing (1). Each reduction compound gear (7) includes a large gear part (71) and a small gear part (72) arranged coaxially. The large gear part (71) of the first reduction compound gear (7) meshes with the driving gear (31). The small gear part (72) of the last reduction compound gear (7) meshes with the driven gear (41). The large gear part (71) of the subsequent reduction compound gear (7) meshes with the small gear part (72) of the previous reduction compound gear (7).

3. The rotary cultivator of claim 2, characterized in that: Each of the reduction compound gears (7) is coaxially provided with a support shaft (8), both ends of each support shaft (8) are connected to the housing (1), and each reduction compound gear (7) is rotatably connected to the corresponding support shaft (8).

4. The rotary cultivator of claim 3, characterized in that: The housing (1) has two symmetrical support plates (9) made of metal material fixed inside, and both ends of each support shaft (8) are connected to the support plate (9) on the corresponding side.

5. The rotary cultivator of claim 4, characterized in that: Each of the support plates (9) is fixed with a support sleeve (91) that corresponds one-to-one with the support shaft (8). Both ends of each support shaft (8) are coaxially fitted into the two support sleeves (91) at the corresponding positions.

6. The rotary cultivator of claim 5, characterized in that: Each of the support plates (9) is provided with a fixing hole (92) corresponding to the support sleeve (91) on the same side. Each support sleeve (91) is inserted into the fixing hole (92) on the support plate (9) on the corresponding side and welded to the support plate (9).

Images