Gearbox for mini-tiller

Abstract

The utility model discloses a gearbox for a mini-tiller, which is characterized in that a gear set formed by combining two double-linkage gears is arranged in a gearbox body to be matched with a sliding gear for controlling a forward gear and a reverse gear, so that the forward gear, the neutral gear and the reverse gear can be switched under the condition that the transmission sequence between the gear sets for subsequently controlling high and low gears is not influenced; by means of the gearbox, the mini-tiller applying the gearbox works more conveniently and flexibly, the requirements of different use environments are met, meanwhile, gear meshing structures capable of being opened and closed are arranged at the front end and the rear end of the gearbox respectively to control the front power output shaft and the rear power output shaft to work or stop, and various externally-hung assemblies of the mini-tiller can be additionally installed according to actual use conditions.

Description

Technical Field

[0001] The utility model relates to the technical field of agricultural machinery, in particular to a gearbox for a micro-tillage machine. Background Art

[0002] In the existing technology, agricultural machines are important tools for realizing mechanized farming. Agricultural machines can greatly improve farming efficiency and reduce the labor intensity of farming. Moreover, micro-agricultural machines can be used for various purposes such as plowing, weeding, sowing, and harvesting by mounting different agricultural machinery accessories. The gearbox used in traditional micro-agricultural machines generally has multiple forward gears with different speeds, but only one low-speed gear in reverse. When used in some narrow terrains such as terraces and mountains, the micro-agricultural machine cannot turn around. Turning around also easily leaves blind spots, resulting in the inability to complete plowing, weeding, sowing, harvesting and other operations at one time. In addition, traditional micro-agricultural machines generally only have one way to install agricultural machinery accessories, either forward or rear. As a result, some rear-mounted micro-agricultural machines can only use low-speed reverse gear when mounting some agricultural machinery accessories that need to be pushed forward to work, which greatly affects the working efficiency of the micro-agricultural machine, and vice versa. Summary of the Invention

[0003] The purpose of the utility model is to provide a new gearbox structure, so that the reverse gear and forward gear of the micro-farming machine have the same number of speed gears, and can also output power to the front or rear end of the gearbox for installing different agricultural machinery accessories.

[0004] A technical solution adopted by the utility model is: a gearbox for a micro-tiller, which includes a box body, an input shaft, four transmission shafts and a wheel transmission shaft provided in the box body, the input shaft is longitudinally installed in the box body, and the four transmission shafts are transversely installed in the box body, a fixed gear is provided on the input shaft near the front end of the box body, and the gear is connected to the fixed gear on the front end of the box body, a bevel gear is installed on the fixed gear on the above-mentioned box body, a first gear shaft is provided with a bevel gear that cooperates with the above-mentioned bevel gear, a fixed duplex gear is provided on the first gear shaft, and a fixed duplex gear is also provided below the above-mentioned duplex gear, the second gear shaft is provided with a slidable front and reverse gear and a slidable duplex gear, the third gear shaft is provided with a first driven gear, a second driven gear and a slidable duplex gear, the fourth gear shaft is provided with a third driven gear, a fourth driven gear and a fixed gear, and the fixed gear is meshed with the fixed gear on the wheel transmission shaft.

[0005] According to the utility model, the fixed double gear on the first gear shaft and the fixed double gear below it are both composed of a large gear and a small gear, and the small gears of the two double gears are meshed with each other. After adopting the above structure, the large gears of the two double gears rotate synchronously in the opposite direction during operation. The slidable front and reverse gear on the second gear shaft can move laterally on the second gear shaft. When the front and reverse gear on the second gear shaft slides to mesh with the large gear of the fixed double gear on the first gear shaft, it is the forward gear position. When the front and reverse gear on the second gear shaft slides to mesh with the large gear of the fixed double gear below the first gear shaft, it is the reverse gear position. When the front and reverse gear on the second gear shaft slides to the middle position between the large gears of the two fixed double gears, it is the neutral position.

[0006] According to the utility model, the slidable double gear on the second gear shaft is composed of a large gear and a small gear, and the double gear can move laterally on the second gear shaft so that its large gear is meshed with the first driven gear on the third gear shaft or the small gear of the double gear is meshed with the second driven gear on the third gear shaft to adjust the first speed ratio; the slidable double gear on the third gear shaft is also composed of a large gear and a small gear, and the double gear can move laterally on the third gear shaft so that its small gear is meshed with the third driven gear on the fourth gear shaft or the large gear of the above-mentioned double gear is meshed with the fourth driven gear on the fourth gear shaft to adjust the second speed ratio. The wheel drive shaft is meshed with the fixed gear on the fourth gear shaft through the fixed gear. The sliding double gears on the second gear shaft and the third gear shaft are adjusted separately by the shift lever to perform two independent speed ratio adjustments, so that the vehicle drive shaft can switch to four different speed ratios.

[0007] According to the present invention, a fixed gear meshing with the fixed gear at the front end of the housing is further provided below the fixed gear. An output shaft is provided below the fixed gear. The portion of the output shaft within the housing is a splined shaft structure. A slidable movable gear is provided on the spline structure of the output shaft. The movable gear can be controlled to engage or disengage with the fixed gear by a paddle. When the movable gear on the output shaft engages with the fixed gear on the housing, the output shaft at the front end of the gearbox rotates, providing output power to the mounted agricultural machinery accessories connected to the front of the mini-farming machine. When the movable gear on the output shaft disengages from the fixed gear on the housing, the output shaft at the front end of the gearbox stops rotating.

[0008] According to the utility model, the input shaft is a spline shaft structure near the rear end of the box body, a slidable movable gear is provided on the spline structure of the input shaft, and a fixed gear that can engage with the above-mentioned movable gear is provided at the rear end of the box body. The sliding gear can be controlled to engage or separate with the fixed gear by a paddle, and an output shaft is provided below the above-mentioned fixed gear. One end of the output shaft in the box body is engaged with the above-mentioned fixed gear through a gear. When the movable gear on the input shaft is engaged with the fixed gear on the box body, the output shaft at the rear end of the gearbox rotates, which can provide output power for the mounted agricultural machinery accessories connected to the rear of the micro-agricultural machine. When the movable gear on the input shaft is separated from the fixed gear on the box body, the output shaft at the rear end of the gearbox stops rotating.

[0009] The beneficial effects of the utility model are as follows:

[0010] The utility model adds a set of gear components below the first gear shaft, so that the sliding gear that controls the front and reverse gears does not affect the transmission relationship between the double-linked gears for gear adjustment and their corresponding meshing passive gears when switching between the forward gear, neutral gear, and reverse gear. As a result, the micro-agricultural machine using the utility model transmission can have the same number of adjustable gears in both forward and reverse gears, making driving smoother in different usage scenarios, thereby improving the working efficiency of the micro-agricultural machine. At the same time, power output ports that can be switched on and off are set at the front and rear ends of the transmission to meet the use requirements of various micro-agricultural machine mounting accessories, enrich the use scenarios of the micro-agricultural machine, and further improve the working efficiency of the micro-agricultural machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a cross-sectional view of a gearbox for a micro-tillage machine of the present invention;

[0012] Figure 2 The utility model is a schematic diagram of the cross-sectional structure of a gearbox for a micro-tillage machine. DETAILED DESCRIPTION

[0013] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more precise definition of the protection scope of the present invention.

[0014] See also Figure 1 and Figure 2A gearbox for a micro-tiller includes a housing 7, in which an input shaft 5, four transmission shafts and a wheel transmission shaft 6 are provided. The input shaft 5 is longitudinally installed in the housing 7, and the input shaft 5 is externally connected to a power output device such as a gasoline engine, a diesel engine or an electric motor. The four transmission shafts are transversely installed in the housing 7. A fixed gear 51 is provided on the input shaft 5 near the front end of the housing 7. The fixed gear 51 is connected to the fixed gear 71 on the front end of the housing. A bevel gear is installed on the fixed gear 71. The first gear shaft 1 is provided with a bevel gear that cooperates with the bevel gear. A fixed double gear 11 is provided on the first gear shaft 1, and a fixed double gear 12 is further provided below the double gear 11. The double gear 11 on the first gear shaft 1 and the double gear 12 below it are both composed of a large gear and a small gear. The small gear of the two double gears is the same. The gears are meshed with each other. After adopting the above structure, the two large gears of the double gear 11 and the double gear 12 rotate synchronously in the opposite direction during operation. A slidable front reverse gear 21 is provided on the second gear shaft 2. The front reverse gear 21 can be moved laterally on the second gear shaft 2 by operating the first shift lever 8. When the front reverse gear 21 on the second gear shaft 2 slides to mesh with the large gear of the fixed double gear 11 on the first gear shaft 1, it is the forward gear position. When the front reverse gear 21 on the second gear shaft 2 slides to mesh with the large gear of the double gear 12 below the first gear shaft, it is the reverse gear position. When the front reverse gear 21 on the second gear shaft 2 slides to the middle position between the large gears of the double gear 11 and the double gear 12, it is the neutral position. The second gear shaft 2 is also provided with a slidable double gear 22, which is composed of a large gear and a small gear. The third gear shaft 3 is provided with a first passive gear 32 and a second passive gear 33. By operating the second shift lever 9, the double gear 22 can be moved laterally on the second gear shaft 2 so that the large gear of the double gear 22 is engaged with the first passive gear 32 on the third gear shaft 3 or the small gear of the double gear 22 is engaged with the second passive gear 33 on the third gear shaft 3, so as to adjust the first speed ratio. A slidable double gear 31 is provided on the third gear shaft 3, and the double gear 31 is composed of a large gear and a small gear. A third driven gear 41 and a fourth driven gear 42 are provided on the fourth gear shaft 4. By operating the third shift lever 10, the double gear 31 can be moved laterally on the third gear shaft 3 so that the small gear of the double gear 31 is engaged with the third driven gear 41 on the fourth gear shaft 4, or the large gear of the double gear 31 is engaged with the fourth driven gear 42 on the fourth gear shaft 4, so as to adjust the speed ratio for the second time.A fixed gear 43 is also provided on the fourth gear shaft 4, which meshes with the fixed gear 61 on the wheel drive shaft 6. After adopting the above-mentioned gearbox structure, the second shift lever 9 can control two different gear speed ratios, and the third shift lever 10 also controls two different gear speed ratios. In this way, the wheel drive shaft 6 of the gearbox can have four different gear speed ratios, so that the micro-tiller has four selectable working gears, and the forward or reverse gear is determined by the position of the front and reverse gears 21 set on the second gear shaft 2, which will not affect the gear transmission sequence between the other gear adjustment gears. Therefore, the micro-tiller using the gearbox of the utility model has the same number of working gears for users to choose from in the forward gear or reverse gear, and can complete the required work faster when used on mountainous areas where it is inconvenient to turn around.

[0015] Furthermore, a fixed gear 72 meshing with the front fixed gear 71 is provided below the housing 7 of the gearbox of the present invention, and an output shaft 73 is provided below the fixed gear 71. The portion of the output shaft 73 inside the housing 7 is a spline shaft structure, and a slidable movable gear 74 is provided on the spline structure of the output shaft 73. The movable gear 74 can be controlled to engage or disengage with the fixed gear 72 by a paddle 75. When the movable gear 74 on the output shaft 73 is engaged with the fixed gear 72 on the housing 7, the output shaft 73 at the front end of the gearbox rotates to provide output power for the mounted agricultural machinery accessories connected to the front of the mini-farming machine. When the movable gear 74 on the output shaft 73 is separated from the fixed gear 72 on the housing 7, the output shaft 73 at the front end of the gearbox stops rotating. At the same time, a spline shaft structure is provided on the input shaft 5 near the rear end of the box body 7, a slidable movable gear 52 is provided on the spline structure of the input shaft 5, and a fixed gear 76 that can mesh with the above-mentioned movable gear 52 is provided at the rear end of the box body 7. The sliding gear 52 can be controlled to engage or separate with the fixed gear 76 by a paddle 53, and an output shaft 77 is provided below the above-mentioned fixed gear 76. One end of the output shaft 77 in the box body 7 is engaged with the fixed gear 76 through a fixed gear 78. When the movable gear 52 on the input shaft 5 is engaged with the fixed gear 76 on the box body 7, the output shaft 77 at the rear end of the gearbox rotates to provide output power for the mounted agricultural machinery accessories installed on the rear of the micro-agricultural machine. When the movable gear 52 on the input shaft 5 is separated from the fixed gear 76 on the box body 7, the output shaft 77 at the rear end of the gearbox stops rotating. After adopting the above structure, the front and rear ends of the gearbox for the micro-tillage machine described in the utility model are equipped with power output interfaces that can be switched independently, which are used to connect and install external mounting parts of various micro-tillage machines such as weeding heads, harvesters, and rice transplanters.

[0016] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A gearbox for a micro-tillage machine, characterized in that: The invention comprises a housing (7), wherein an input shaft (5), four transmission shafts and a wheel transmission shaft (6) are provided in the housing, wherein the input shaft (5) is longitudinally mounted in the housing (7), and the four transmission shafts are transversely mounted in the housing, wherein a fixed gear (51) is provided on the input shaft (5) near the front end of the housing (7), wherein the fixed gear (51) is connected to the fixed gear (71) on the front end of the housing (7), wherein a bevel gear is mounted on the fixed gear (71), wherein a bevel gear matching the bevel gear is provided on the first gear shaft (1), wherein a fixed double gear (11) is provided on the first gear shaft (1), wherein A fixed double gear (12) is provided below the double gear (11), a slidable front and reverse gear (21) and a slidable double gear (22) are provided on the second gear shaft (2), a first driven gear (32), a second driven gear (33) and a slidable double gear (31) are provided on the third gear shaft (3), a third driven gear (41), a fourth driven gear (42) and a fixed gear (43) are provided on the fourth gear shaft (4), and a fixed gear (61) is provided on the wheel transmission shaft (6) and meshes with the fixed gear (43) on the fourth gear shaft (4).

2. A gearbox for a micro-tillage machine according to claim 1, characterized in that: The fixed double gear (11) on the first gear shaft (1) and the fixed double gear (12) below it are both composed of a large gear and a small gear. The small gears of the double gear (11) and the double gear (12) are meshed with each other. The slidable forward and reverse gear (21) on the second gear shaft (2) can move laterally on the second gear shaft (2) to achieve three states of meshing with the large gear of the double gear (11), meshing with the large gear of the double gear (12), and not meshing with the above two gears, thereby realizing the three states of forward, reverse, and neutral.

3. The gearbox for a micro-tillage machine according to claim 1, characterized in that: The slidable double gear (22) on the second gear shaft (2) is composed of a large gear and a small gear. The double gear (22) can be moved laterally on the second gear shaft (2) so that its small gear is meshed with the first passive gear (32) on the third gear shaft (3) or the large gear of the double gear (22) is meshed with the second passive gear (33); the slidable double gear (31) on the third gear shaft (3) is composed of a large gear and a small gear. The double gear (31) can be moved laterally on the third gear shaft (3) so that its small gear is meshed with the third passive gear (41) on the fourth gear shaft (4) or the large gear of the double gear (31) is meshed with the fourth passive gear (42).

4. The gearbox for a micro-tillage machine according to claim 1, characterized in that: A fixed gear (72) meshing with the above-mentioned gear is provided below the fixed gear (71) at the front end of the box body. An output shaft (73) is provided below the fixed gear (72). The portion of the output shaft (73) inside the box body (7) is a spline shaft structure. A slidable movable gear (74) is provided on the spline structure of the output shaft (73). The movable gear (74) can be controlled by a paddle (75) to mesh with or separate from the fixed gear (72).

5. The gearbox for a micro-tillage machine according to claim 1, characterized in that: The input shaft (5) is a spline shaft structure at the rear end near the housing (7), a slidable movable gear (52) is provided on the spline structure of the input shaft (5), and a fixed gear (76) that can mesh with the movable gear (52) is provided at the rear end of the housing (7). The sliding gear (52) can be controlled to mesh with or separate from the fixed gear (76) by a paddle (53), and an output shaft (77) is provided below the fixed gear (76). A fixed gear (78) is provided at one end of the output shaft in the housing (7) and meshes with the fixed gear (76).

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