A gearbox and integrated weeding machine

Abstract

The utility model discloses a gearbox and integral type weeding machine, it is fixed with drive gear on input shaft, drive gear is connected with driving part, and driving part can realize the axial transverse of drive gear on input shaft, cooperate drive gear and set driven gear I and driven gear II, and driven gear I and driven gear II coaxial setting and are connected with intermediate gear, and intermediate gear is connected with output pulley, and output pulley is fixed on output shaft, cooperate drive gear still is provided with toothed engagement type reverse subassembly, and drive gear is realized with idler wheel connection through toothed engagement type reverse subassembly, and idler wheel is connected with output pulley. After this gearbox connection, can realize the positive drive of different speed ratio through driven gear I and driven gear II respectively, realizes rotary tillage and the drive of weeding, and then realizes the reverse drive when mowing through idler wheel and output pulley connection, realizes three kinds of driving function on integral type weeding machine without changing gearbox, and its output is stable.

Description

Technical Field

[0001] This utility model relates to the technical field of integrated weeding, shredding, and rotary tillage machines, and particularly to a gearbox and an integrated weeding machine. Background Technology

[0002] As is well known, existing small agricultural weeders are designed with a single function, mainly for weeding the ground. However, in agricultural planting, the demand for such small machines is very large. They are not only used for weeding, but also for shredding and rotary tillage. Existing weeders cannot perform all of these functions. Their main bottleneck lies in the design of the gearbox and the working chamber.

[0003] In the existing technology, because the speed and direction required for weeding, shredding, and rotary tillage are different, the gearboxes currently adapted to this type of small weeder have a simple structure and single function. They were designed in the early stages only to consider the functions of weeding and rotary tillage. Therefore, they can only achieve single-speed operation for weeding and cannot achieve high and low speed or forward and reverse rotation control. Therefore, the existing gearboxes cannot directly improve the functional shortcomings of the existing small weeders.

[0004] As someone skilled in the art, there is a need to design a gearbox that is relatively simple in structure, stable in operation, and easy to operate. The requirement is that it can achieve the output of the size ratio of rotary tillage and grass shredding, and can also achieve forward and reverse rotation control. When combined with the grass shredder in the working chamber, it can more easily shred weeds and make the operation safer for the operator. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the present invention focuses on developing a gearbox and an integrated weed cutter. The purpose of the gearbox is to achieve different speed ratio outputs for weeding, shredding, and rotary tillage functions through a relatively simple structure. At the same time, in conjunction with the working chamber, the rotary tillage blade, weeding blade, and shredding blade can be quickly changed without disassembling the entire machine.

[0006] The technical solution adopted is as follows: A gearbox includes an input shaft, on which a drive gear is fixed, the drive gear being connected to a drive member, the drive member enabling axial lateral movement of the drive gear on the input shaft; Driven gear I and driven gear II are provided in conjunction with the drive gear. Driven gear I and driven gear II are coaxially arranged and connected to the intermediate gear. The intermediate gear is connected to the output pulley, and the output pulley is fixed on the output shaft. The drive gear is also equipped with a toothed reversing component, which connects the drive gear to the idler gear, and the idler gear is connected to the output pulley.

[0007] The aforementioned tooth-clutch reversing assembly is a plug-in clutch with a concave-convex fit.

[0008] The drive component includes a shift fork and a shift fork rod. The shift fork rod is provided with a hinge protrusion. The hinge protrusion is inserted into an external constraint groove and achieves a swing engagement. The external constraint groove is provided on a swing plate, and the swing plate is fixed on a positioning shaft.

[0009] The drive gear is a double-plate gear, with its spacing fixed on the input shaft.

[0010] An integrated weed cutter includes a frame, an engine mounted on top of the frame, the engine being connected to a gearbox via a belt or chain, and a main drive wheel connected to the engine on the input shaft of the gearbox; a handle is also mounted on top of the frame; the integrated weed cutter is controlled via the handle; a working chamber is located on the front side of the frame, and a rotating frame is located inside the working chamber, with several blades mounted on the rotating frame; a working chamber drive shaft is connected to the rotating frame, extending to the outside of the working chamber and connected to the output shaft of the gearbox; the working chamber drive shaft is a hollow shaft or a solid shaft.

[0011] The blades include grass shredders and rotary tillers.

[0012] The beneficial effects of this utility model are as follows: Through the above structural design, a drive gear is fixed on the input shaft, connected to a drive component, which allows the drive gear to move axially on the input shaft. Driven gears I and II are coaxially arranged and connected to an intermediate gear, which is connected to an output pulley fixed on the output shaft. A jaw-type reversing assembly is also provided, connecting the drive gear to an idler gear, which in turn connects to the output pulley. After connection, this gearbox can achieve forward drive with different speed ratios via driven gears I and II, enabling rotary tillage and weeding. Reverse drive is achieved by connecting the idler gear to the output pulley. It boasts high efficiency, providing multiple functional outputs from a single gearbox. This allows for three drive functions to be obtained on an integrated weeding machine without modification of the gearbox, with stable output, thus providing an ideal gearbox and integrated weeding machine. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of one side of the shift fork inside the gearbox; Figure 2 This is a three-dimensional structural diagram of one side of the driven gear II inside the gearbox; Figure 3 This is a three-dimensional structural diagram of one side of the output pulley inside the gearbox; Figure 4 This is a three-dimensional structural diagram of one side of the input shaft inside the gearbox; Figure 5 This is a front view diagram of the internal structure of the gear shift fork lever in the gearbox; Figure 6 This is a schematic diagram of the rear structure of an integrated weed cutter; Figure 7 This is a schematic diagram of the front structure of an integrated weed cutter; Reference numerals: 1. Intermediate gear; 2. Driven gear I; 3. Driven gear II; 4. Swing plate; 41. Positioning shaft; 42. External constraint groove; 5. Shift fork; 6. Shift fork lever; 61. Hinge protrusion; 7. Input shaft; 71. Bearing; 72. Main drive wheel; 73. Groove; 8. Drive gear; 81. Clutch protrusion; 9. Idler wheel; 91. Clutch groove; 10. Output pulley; 11. Output shaft; 111. Output pulley; 112. Working chamber drive wheel; 113. Belt; 114. Rotating frame; 115. Grass shredder; 116. Working chamber drive shaft; 12. Output bearing; 13. Working chamber; 14. Gearbox; 15. Frame; 16. Handrail; 17. Engine. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the scope of the present utility model.

[0015] Example 1: A gearbox 14, the internal structure of which can be viewed from various angles, such as Figure 1-5 As shown, it includes an input shaft 7, and the input shaft 7 is provided with several grooves and bearings 73 on its periphery. The drive gear 8 is fixed through the grooves 73. The drive gear 8 is connected to the drive component, and the drive component can realize the axial lateral movement of the drive gear 8 on the input shaft 7.

[0016] In this embodiment, the driving component includes a shift fork 5 and a shift fork lever 6. The shift fork lever 6 is provided with a hinge protrusion 61. The hinge protrusion 61 is inserted into the external constraint groove 42 and achieves a swing engagement. The external constraint groove 42 is provided on the swing plate 4. The swing plate 4 is fixed on the positioning shaft 41. When the gearbox 14 is fixed to the outer housing, the positioning shaft 41 passes through the hole on the housing and achieves insertion positioning.

[0017] This utility model, in conjunction with the drive gear 8, includes driven gear I2 and driven gear II3. In this embodiment, driven gear I2 and driven gear II3 are coaxially arranged and connected to intermediate gear 1. Intermediate gear 1 is connected to output pulley 10, and output pulley 10 is fixed on output shaft 11. In this embodiment, the drive gear 8 is configured as a double-plate gear, which is fixed at intervals on the input shaft 7. When the drive component drives the drive gear 8 to move laterally, the double-plate gear engages with driven gear I2 and driven gear II3 respectively. When driven gear I2 and driven gear II3 are designed with different numbers of teeth, different speed ratios can be achieved. Setting the drive gear 8 as a double-plate gear reduces the drive stroke during left and right movement for adjustment. Simultaneously, fixing the shift fork 5 in the middle of the double-plate gear improves drive stability.

[0018] In this embodiment, the speed ratios of driven gear I2 and driven gear II3 to drive gear 8 are 1:4.4 and 1:6.2, respectively. When the speed ratio is 1:4.4, forward rotation is used for rotary tillage. This speed ratio provides high drive power output and is suitable for rotary soil breaking drive below the ground surface. When the number of teeth is 1:6.2, forward rotation is used for weeding. This speed ratio provides high drive speed, enabling weed cutting at high speeds, thus improving weeding efficiency.

[0019] This gearbox, in conjunction with the drive gear 8, is also equipped with a dog clutch reversing assembly. This assembly connects the drive gear 8 to the idler wheel 9, which in turn connects to the output pulley 10. The dog clutch reversing assembly is either a clutch or a plug-in clutch with a convex-concave engagement. In this embodiment, considering manufacturing costs and reducing operational failure rates, a plug-in clutch is used. Specifically, multiple clutch protrusions 81 are provided on the side of the drive gear 8, and corresponding clutch grooves 91 are provided on the idler wheel 9 to engage with the protrusions 81. When the drive gear 8 drives in the forward direction, the idler wheel 9 rotates in the same direction, achieving reverse drive by meshing with the output pulley 10. When the speed ratio is controlled at 1.072, the cutter rotates outward in the reverse direction. This is typically used for surface grass shredding, providing high power output while preventing the scattering of grass and other debris, thus avoiding injury to operators and bystanders.

[0020] Example 2: An integrated weeding machine, such as Figure 6 , 7As shown, it includes a frame 15, with an engine 17 mounted on top of the frame 15. In this embodiment, a gasoline engine is used, but those skilled in the art can also use a diesel engine or an electric motor. The engine 17 is connected to a gearbox 14 via a belt or chain. A main drive wheel 72 is mounted on the input shaft 7 of the gearbox 14 and connected to the engine 17. A handrail 16 is also mounted on top of the frame 15. The handrail 16 enables operation and control of this integrated weeder. A working chamber 13 is located on the front side of the frame 15. A rotating frame 114 is located inside the working chamber 13. Several blades are mounted on the rotating frame 114. The blades include grass shredders or rotary tillers. In this embodiment, the grass shredder 115 is fixed.

[0021] The rotating frame 114 is connected to the working chamber drive shaft 116, which extends to the outside of the working chamber 13 and is connected to the output shaft 11 on the gearbox 14. The working chamber drive shaft 116 can be a hollow shaft or a solid shaft. Since the use of hollow shafts and solid shafts is common in the prior art, it will not be described in detail here.

[0022] With the above structural design, this utility model allows for the selection of either a grass-chopping blade or a rotary tiller blade based on actual needs. When selecting different blades, the gear selection can be based on the gear selection instructions in Example 1, choosing one of the functions: neutral, high speed forward rotation, low speed forward rotation, or reverse rotation. This enables rotary tillage, weeding, and grass-chopping operations, achieving three drive functions on an integrated weed cutter without changing the gearbox. Its output is stable, making it an ideal gearbox and integrated weed cutter.

Claims

1. A gearbox, characterized in that: It includes an input shaft, on which a drive gear is fixed. The drive gear is connected to a drive component, which enables the drive gear to move axially on the input shaft. Driven gear I and driven gear II are provided in conjunction with the drive gear. Driven gear I and driven gear II are coaxially arranged and connected to the intermediate gear. The intermediate gear is connected to the output pulley, and the output pulley is fixed on the output shaft. The drive gear is also equipped with a toothed reversing component, which connects the drive gear to the idler gear, and the idler gear is connected to the output pulley.

2. The gearbox according to claim 1, characterized in that: The aforementioned tooth-clutch reversing assembly is a plug-in clutch with a concave-convex fit.

3. A gearbox according to claim 1, characterized in that: The drive component includes a shift fork and a shift fork rod. The shift fork rod is provided with a hinge protrusion. The hinge protrusion is inserted into an external constraint groove and achieves a swing engagement. The external constraint groove is provided on a swing plate, and the swing plate is fixed on a positioning shaft.

4. A gearbox according to claim 1, characterized in that: The drive gear is a double-plate gear, with its spacing fixed on the input shaft.

5. An integrated weed cutter, comprising a gearbox as described in any one of claims 1-4, characterized in that: It includes a frame, with an engine mounted on top of the frame. The engine is connected to a gearbox via a belt or chain. A main drive wheel is mounted on the input shaft of the gearbox and connected to the engine. A handrail is also mounted on top of the frame, allowing control of the integrated weed cutter. A working chamber is located on the front of the frame, containing a rotating frame with several blades. A drive shaft for the working chamber extends from the rotating frame to the outside of the working chamber and connects to the output shaft of the gearbox. The drive shaft for the working chamber can be a hollow or solid shaft.

6. The integrated weeding machine according to claim 5, characterized in that: The blades include grass shredders and rotary tillers.

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