Low-power multifunctional micro gearbox for agricultural use

Abstract

The utility model discloses a low -power agricultural multifunctional micro transmission, through the innovative multifunctional output shaft sliding gearshift mechanism, separate control panel and the unique gear design, can realize multifunctional output shaft separate output, walking axle separate output, multifunctional output shaft and walking axle linkage output etc.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery, specifically to a multi-functional micro gearbox suitable for low-power agricultural applications. Background Technology

[0002] With the development of agricultural mechanization, low-power small agricultural machinery has been widely used in farmland operations and has been well received by farmers. However, existing farm implements are diverse, and different implements sometimes require different power sources to complete their tasks. Some implements require low speed from the power unit, some require high speed, some require a certain travel speed, and some require a combination of power. However, most existing gearboxes have relatively simple functions and cannot simultaneously meet the power requirements of multiple implements, i.e., they cannot meet the needs of multiple transmission modes in complex farmland operation scenarios. In addition, the existing gearbox housing materials are either too heavy (such as all-gray cast iron) or not strong enough for working in mountainous farmland (such as aluminum housing), which are prone to cracking and other problems, seriously affecting the performance and service life of the mini tiller. Utility Model Content

[0003] To address the technical problems existing in the prior art, this utility model aims to provide a low-power agricultural multi-functional micro gearbox and its control method. By integrating the power of multiple agricultural implements and multiple power transmission platforms, it reduces power duplication and lowers the economic and operational burden on farmers. At the same time, through innovative design, it reduces the size of the transmission and improves the applicability of the gearbox in farmland operations. Furthermore, it solves the problems existing in the housing material of the current gearbox, enhancing the overall performance and durability of the gearbox.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: In a first aspect, the present invention provides a low-power agricultural multi-functional micro gearbox, comprising a main housing, wherein a multi-functional output shaft assembly, an input shaft assembly, a lower travel shaft assembly, a reverse gear shaft assembly, and an idler gear assembly are disposed within the main housing; The multi-functional output shaft assembly includes an output shaft, on which an output double gear is provided; The input shaft assembly includes an input shaft, on which an independent gear and an input double gear are provided; The idler assembly includes an idler shaft, on which an idler wheel connected by a needle roller bearing is provided; The lower travel shaft assembly includes a lower travel shaft, on which a lower travel double gear is provided; A shift lever is installed on one side of the main housing, and the shift lever is used to move the output double gear; A clutch lever is installed on the other side of the main housing, the clutch lever being used to engage the clutch; The reverse gear lever is located on the same side as the clutch lever on the main housing, and it actuates the reverse gear shaft assembly. A downward travel lever is provided on the top of the main housing. The downward travel lever is used to move the input double gear. The input shaft assembly and the lower travel shaft assembly are mounted vertically, while the reverse gear shaft assembly and the multi-function output shaft assembly are mounted on the left and right sides of the input shaft assembly and the lower travel shaft assembly, respectively. An idler gear assembly is mounted between the output shaft assembly and the lower travel shaft assembly, and the idler gear is always meshed with the independent gear on the input shaft.

[0005] As a further technical solution, along the axial direction of the main housing, the output double gear includes a small gear and a large gear arranged in sequence; the input double gear includes a small gear and a large gear arranged in sequence, and both the small gear and the large gear of the input double gear are smaller than the independent gear; the downward double gear includes a large gear and a small gear arranged in sequence.

[0006] As a further technical solution, the end of the multi-functional output shaft is a splined hole extending out of the main housing for connecting to the matching interface of multiple agricultural implements.

[0007] As a further technical solution, the input shaft of the input shaft assembly is located above the center line of the main housing and on the center line of the gearbox.

[0008] As a further technical solution, the main housing is made of QT450 asymmetric thin-walled casting.

[0009] As a further technical solution, a bearing and oil seal are provided at one end of the input shaft, and a clutch shift fork is provided at the other end.

[0010] As a further technical solution, the input shaft assembly, the multi-functional output shaft assembly, and the down-travel shaft assembly are arranged in a triangular structure.

[0011] As a further technical solution, the lower travel shaft assembly is located at the lower part of the dividing line in the main housing.

[0012] As a further technical solution, the reverse gear shaft assembly, the input shaft assembly, and the downdrive shaft assembly are arranged in a triangular structure.

[0013] As a further technical solution, the idler assembly includes an idler shaft, on which an idler wheel connected by a needle roller bearing is provided; and idler baffles are provided on both sides of the idler wheel.

[0014] The beneficial effects of this utility model are as follows: This utility model integrates a multi-functional output shaft assembly, input shaft assembly, downshift shaft assembly, reverse gear shaft assembly, and idler gear assembly into a gearbox. It achieves multiple output modes and convenient gear shifting operations through the control of the shift lever, clutch lever, reverse gear lever, and downshift gear lever. This simplifies the operation process, reduces the operational burden, and meets the needs of multiple speed change modes in complex farmland operation scenarios. At the same time, by integrating the power of multiple agricultural implements and multi-power transmission platforms, the need for farmers to purchase multiple agricultural implements is reduced, thus lowering their economic burden.

[0015] The multi-functional output shaft design and multiple output modes can meet the needs of different farmland operation scenarios, improving the operating efficiency and applicability of agricultural machinery. For example, it can provide appropriate power output under different operating speeds and torque requirements.

[0016] The main housing of the gearbox is made of QT450 asymmetric thin-walled casting, which reduces weight while ensuring strength and solves the defects of existing housing materials; the internal gear transmission structure replaces the external belt pulley transmission, reducing the transmission volume and making the gearbox structure more compact and reasonable. Attached Figure Description

[0017] Figure 1a , Figure 1b This is an isometric schematic diagram of the present invention; Figure 2 This is a cross-sectional schematic diagram showing the distribution of the holes corresponding to the internal transmission positions of this utility model. Figure 2a This is a schematic diagram of the multifunctional output shaft assembly of this utility model; Figure 2b This is a schematic diagram of the input shaft assembly of this utility model; Figure 2c This is a schematic diagram of the lower traveling shaft assembly of this utility model; Figure 2d This is a schematic diagram of the reverse gear shaft assembly of this utility model; Figure 2e This is a schematic diagram of the idler wheel assembly of this utility model; Figure 2f This is a cross-sectional view of the asymmetric thin-walled casting of this utility model; Figure 3 This is a schematic diagram of the fully neutral position of this utility model; Figure 3a This is a schematic diagram of the clutch lever controlling the clutch according to this utility model; Figure 4 This is a schematic diagram of the multi-functional shaft output low-speed transmission of this utility model. Figure 5 This is a schematic diagram of the high-speed transmission of the multifunctional output shaft of this utility model; Figure 5a This is a schematic diagram of the state of the high-speed transmission idler wheel of the multifunctional output shaft of this utility model; Figure 6 This is a schematic diagram of the slow-speed transmission of the lower traveling shaft of this utility model. Figure 6 a is a schematic diagram of the slow output of the lower traveling shaft of this utility model; Figure 7 This is a schematic diagram of the rapid transmission of the lower traveling shaft of this utility model; Figure 7a This is a schematic diagram of the rapid output of the lower traveling shaft of this utility model; Figure 8 This is a schematic diagram of the high-speed mode matching walking rapid combined transmission of the multi-functional output shaft of this utility model; Figure 8a This is a schematic diagram of the state of the high-speed transmission idler wheel of the multifunctional output shaft of this utility model; Figure 9 A schematic diagram of the multi-functional output shaft high-speed mode matching slow-speed combined transmission of this utility model; Figure 9a This is a schematic diagram of the state of the high-speed transmission idler wheel of the multifunctional output shaft of this utility model; Figure 10 A schematic diagram of the low-speed mode matching slow-speed combined transmission of the multi-functional output shaft of this utility model. Figure 11 This is a schematic diagram illustrating the preparation or disengagement of the reverse gear in this utility model. Figure 11a This is a schematic diagram of the reverse gear transmission of this utility model; Figure 12 This is a schematic diagram of the high-speed shifting function of the multi-functional control panel of this utility model; Figure 13 This is a schematic diagram of the low-speed gear shifting of the multi-functional control panel of this utility model; In the picture: 1. Clutch lever; 2. Downward travel shift lever; 3. Gear shift handle; 4. Multi-function output shaft assembly; 5. Input shaft assembly; 6. Downward travel shaft assembly; 7. Reverse gear shaft assembly; 8. Idler gear assembly; 9. Downward travel gearbox body; 10. Main housing; 11. Dipstick; 12. Gearbox front cover; 13. Downward travel output shaft; 14. First hole; 15. Second hole; 16. Third hole; 17. Fourth hole; 18. Fifth hole; 19. Control panel; 4-1 Multi-functional output shaft; 4-2 Oil seal; 4-3 Bearing; 4-4 Multi-functional output shaft double gear; 4-5 Bearing; 5-1 Oil seal; 5-2 Bearing; 5-3 Clutch shift fork; 5-4 Clutch; 5-5 Input shaft independent gear; 5-6 Input shaft double gear; 5-8 Input shaft; 6-1 Double gear; 6-2 Bevel gear shaft; 7-1 Reverse gear lever; 7-2 Spring; 7-3 Reverse double gear; 7-4 Reverse gear shaft; 8-1 Idler wheel; 8-2 Idler wheel baffle; 8-3 Idler wheel shaft; 8-4 Needle roller bearing; 10-1 Sectioning location of asymmetric casting thin-walled section; 10-2 Sectioning location of asymmetric casting thick-walled section; Detailed Implementation It should be noted that the following detailed description is illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0018] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, unless otherwise expressly indicated by the present invention, the singular form is also intended to include the plural form. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof. For ease of description, the words "up," "down," "left," and "right" appearing in this utility model only indicate that they are consistent with the up, down, left, and right directions of the accompanying drawings. They do not limit the structure and are merely for the purpose of facilitating the description of this utility model and simplifying the description. They do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0019] like Figure 1a , Figure 1b As shown, the low-power agricultural multi-functional micro gearbox disclosed in this embodiment includes a main housing 10, and a multi-functional output shaft assembly 4, an input shaft assembly 5, a lower travel shaft assembly 6, a reverse gear shaft assembly 7, and an idler gear assembly 8 are disposed in the main housing 10. The gearbox is sealed into a cavity by a front cover 12 at the front end of the main housing 10. An oil dipstick 11 is used to measure the oil level, creating a closed cavity that allows for oil level measurement. The lower part of the main housing 10 connects to the travel box 9, which is the low-power agricultural multi-functional micro gearbox disclosed in this embodiment. A multi-functional output shaft shift lever 3 is installed on one side of the main housing 10. This lever is used to actuate the double gear on the multi-functional output shaft assembly 4. A clutch lever 1 is installed on the other side of the main housing 10. The clutch lever 1 controls the clutch, enabling the connection and disconnection of power to the gearbox without stopping the engine. Releasing the clutch lever 1 results in no gearbox movement; engaging the clutch lever 1 results in gearbox movement. On the same side of the main housing where the clutch lever is installed, a reverse gear lever actuates the reverse gear shaft assembly 7. Releasing the reverse gear lever causes the reverse gear wheel to automatically spring back, ending the reverse gear engagement.

[0020] A downward travel lever 2 is provided on the top of the main housing. The downward travel lever 2 is used to move the double gear 5-6 on the input shaft assembly. The main housing is provided with a first hole 14, a second hole 15, a third hole 16, and a fourth hole 17; as shown. Figure 2 As shown, the multi-functional output shaft assembly 4 is installed in the fourth hole 17, the input shaft assembly 5 is installed in the first hole 14, the lower travel shaft assembly 6 is installed in the third hole 16, and the reverse gear shaft assembly 7 is installed in the second hole 15. The multi-functional output shaft assembly 4, the input shaft assembly 5, the lower travel shaft assembly 6, and the reverse gear shaft assembly 7 are arranged in a double-pizi planetary configuration, with a compact and reasonable structure. That is, the input shaft assembly 5 and the lower travel shaft assembly 6 are installed vertically, and the reverse gear shaft assembly 7 and the multi-functional output shaft assembly 4 are installed on the left and right sides of the input shaft assembly 5 and the lower travel shaft assembly 6. The idler gear assembly is installed between the output shaft assembly and the lower travel shaft assembly, and the idler gear is always meshed with the independent gear of the input shaft.

[0021] like Figure 2 , Figure 2b As shown, the input shaft assembly 5 is installed at the first hole position 14 obtained through calculation. This position is located above the dividing line and the center line of gravity in the main housing, which can achieve the best dynamic balance effect. The input shaft assembly 5 includes an input shaft 5-8, on which a double gear 5-6 and an independent gear 5-5 are installed. A bearing 5-2 and an oil seal 5-1 are provided at one end of the input shaft 5-8, and a clutch shift fork 5-3 is provided at the other end. like Figure 2b As shown, after the bearing 5-2 is tightly fitted with the first hole 14, the oil seal 5-1 installs the input shaft assembly 5 inside the main housing 10, making the input transmission more stable and balanced. Furthermore, the input shaft assembly 5, the multi-functional output shaft assembly 4, and the lower travel shaft assembly 6 form a triangular structure, enabling the multi-functional output shaft assembly 4 and the lower travel shaft assembly 6 to work in conjunction. like Figure 2 , Figure 2c As shown, the lower travel shaft assembly 6 is installed in the third hole position 16. The lower travel shaft assembly 6 includes a lower travel shaft, on which a double gear is provided. The lower travel shaft assembly 6 is located at the lower part of the dividing line in the main housing; and it forms a triangular structure with the multi-functional output shaft assembly 4 and the input shaft assembly 5.

[0022] like Figure 2 , Figure 2d As shown, the reverse gear shaft assembly 7 is installed in the second hole 15. By cooperating with the lower travel shaft 6 and the input shaft 5, the reverse gear shaft assembly 7, the input shaft assembly 5 and the lower travel shaft assembly 6 form a triangular structure to produce reverse gear transmission. like Figure 2 , Figure 2e As shown, the idler gear assembly 8 is installed in the fifth hole 18. Through its engagement with the output shaft 4 and the input shaft 5, the idler gear assembly is installed between the output shaft assembly and the lower travel shaft assembly. The idler gear and the independent gear of the input shaft are always meshed. When the upper gear of the output shaft 4 is moved to engage with the idler gear by the shift lever, the input shaft 5 transmits power to the input shaft 4. like Figure 2e As shown, the idler assembly 8 includes an idler shaft 8-3, and an idler 8-1 connected to a needle roller bearing 8-4 is provided on the idler shaft 8-3; idler baffles 8-2 are provided on both sides of the idler 8-1 to prevent the idler from moving axially.

[0023] like Figure 2 , Figure 2a As shown, the multi-functional output shaft assembly 4 includes a multi-functional output shaft 4-1, an oil seal 4-2, a bearing 4-3, a multi-functional output shaft double gear 4-4, and a bearing 4-5. The multi-functional output shaft double gear 4-4 is mounted on the multi-functional output shaft 4-1, and bearings 4-3, 4-5, and the oil seal 4-2 are mounted near both ends. The shaft end of the multi-functional output shaft 4-1 is a splined shaft with holes extending outside the main housing for connecting to the matching interface of multiple agricultural implements. A double-stabilized structure on both sides is used to install the multi-functional output shaft 4 inside the main housing, and the oil seal 4-2 seals the shaft body. The multi-functional output shaft assembly 4, input shaft assembly 5, and lower travel shaft assembly 6 form a triangular structure. The multi-functional output shaft double gear 4-4 is controlled by the multi-functional output shaft shift handle 3 to move on the multi-functional output shaft 4-1, and transmission with the input shaft double gear 5-6 is achieved through the idler gear 8-1 in the idler gear assembly 8. As shown in Figure 1, the control panel 19 is located on the right side of the main casing. This location is designed based on behavioral data about human beings' habitual right-side working posture. The preferred location selection is based on this behavioral data; subsequent personalized designs and customizations are different and fall within the scope of this design.

[0024] like Figure 3With all components in neutral, when the engine is started and rotated, the transmission remains inactive even without the clutch lever 1 being engaged, as clutch 5-4 is disengaged. Only the clutch fork 5-3 rotates the disengaged clutch 5-4. When... Figure 3 become Figure 3a To engage the clutch lever 1, the clutch lever controls clutch 5-4. Clutch 5-4 closes and connects to the clutch fork 5-3, thus connecting to engine power. This is a safe connection method; the equipment should first complete the gear shift before engaging the clutch lever to output power.

[0025] Specifically, the control process is explained below with reference to the above-mentioned device: Gear shifting operation: Taking a 4.0kw engine as an example, the rated speed is 3600 rpm. At the highest actual speed, the torque is the lowest. This state cannot output practical power for agricultural implements. The rated speed cannot output the maximum torque. When the output speed is 2600 rpm, the fuel efficiency is the highest, and the engine actually outputs the maximum torque value.

[0026] The control method for the independent speed-changing output of the multi-functional output shaft is as follows: Low-speed agricultural implements typically require a rotational speed of 1100-1150 rpm, with a preferred transmission ratio of 2.294 / 1. For example... Figure 4 As shown, the downshift lever 2 is locked in the middle position. Slide the multi-function output shaft shift lever 3 to the right, locking it at the far right. The multi-function output shaft double gear 4-4 follows the multi-function output shaft shift lever 3, sliding equidistantly to the same position. The multi-function output shaft double gear 4-4 directly meshes with the input shaft double gear 5-6 at the optimal meshing position; that is, the large gear of the multi-function output shaft double gear 4-4 meshes with the small gear in the input shaft double gear 5-6. At this time, the small gear in the input shaft double gear 5-6 and the large gear of the multi-function output shaft mesh to produce a transmission ratio of 2.294 / 1. When the clutch lever 1 is moved, power is input. At the engine's maximum torque, the output is 1133 rpm. This can be used alone at low speed, such as when parked in the field or orchard for spraying pesticides; after the equipment is parked, a peeling machine can be attached for peeling and root removal operations.

[0027] High-speed agricultural implements typically require speeds of 3400-3500 rpm, with a preferred transmission ratio of 1 / 1.333. For example... Figure 4 , Figure 5 , Figure 5aAs shown, the downward travel shift lever 2 is locked in the middle position. Slide the multi-function output shaft shift lever 3 to the left, locking it at the leftmost position. The multi-function output shaft double gear 4-4 follows the multi-function output shaft shift lever 3, sliding equidistantly to the same position. At the optimal meshing position, the multi-function output shaft double gear 4-4 meshes with the input shaft independent gear 5-5 via the idler gear 8-1. That is, the pinion of the multi-function output shaft double gear 4-4 meshes with the input shaft independent gear 5-5 via the idler gear 8-1. At this time, the pinion of the multi-function output shaft double gear 4-4 and the input shaft independent gear 5-5 produce a 1 / 1.333 transmission ratio. The idler gear does not affect the transmission ratio. When the clutch lever 1 is moved, at the engine's maximum torque, the output shaft 4 outputs a high-speed rotation of 3465 rpm. This can be used independently at high speed or low speed. For example, when stopping pumping water, the equipment can be stopped at any water-bearing location for pumping operations; or connected to a generator for field power generation, etc.

[0028] The independent speed control method for the travel axis is as follows: like Figure 6 , Figure 6a As shown, the multi-function output shaft shift lever 3 is locked at the far right. Moving the down travel shift lever 2 locks it at the far left, causing the input shaft double gear 5-6 to slide equidistantly to the same position as the down travel shift lever 2. At this time, the large gear of the double gear 6-1 in the down travel shaft assembly 6 meshes with the small gear of the input double gear 5-6 in the input shaft 5. The large gear in the input double gear 5-6 engages with the small gear of the travel double gear 6-1 for output. When the clutch lever 1 is moved, power is input, as shown... Figure 6a The first-stage transmission connected to the lower travel shaft 6, through the bevel gear shaft 6-2 of the lower travel shaft and the lower travel box, via the second-stage transmission, enables the rotating wheel shaft 13 to output a slow travel speed of 70 revolutions per minute. At this time, the slow travel speed can be used alone, and when used with non-powered agricultural implements, it can be used for tasks such as mulching, soil breaking and fine tillage.

[0029] like Figure 7 , Figure 7a As shown, the multi-function output shaft shift lever 3 is locked at the far right. Moving the downshift lever 2 locks it at the far right, causing the input shaft double gear 5-6 to slide equidistantly to the same position as the downshift lever 2. At this time, the small gear of the double gear 6-1 meshes with the large gear of the input double gear 5-6 in the input shaft 5. The large gear of the input double gear 5-6 engages with the small gear of the travel double gear 6-1 for output. When the clutch lever 1 is moved, power is input, as shown... Figure 7a The first-stage transmission connected to the lower travel shaft 4, through the 6-2 bevel gear shaft of the lower travel shaft and the lower travel box, via the second-stage transmission, enables the rotating wheel shaft 13 to output 115 revolutions per minute for rapid travel. At this point, the rapid travel can be used alone, and when combined with non-powered agricultural implements, it can perform ordinary rotary tillage and other operations.

[0030] The control method for the linkage output is as follows: like Figure 8 , Figure 8a As shown, when the multi-function output shaft shift lever 3 is slid to the right and locked at the far right, the double gear 4-4 of the multi-function output shaft assembly 4 slides equidistantly to the same position along with the multi-function output shaft shift lever 3. At the optimal meshing position, the double gear 4-4 of the multi-function output shaft meshes with the independent gear 5-5 in the input shaft 5 via the idler wheel 8-1. That is, the small gear of the double gear 4-4 of the multi-function output shaft meshes with the independent gear 5-5 of the input shaft via the idler wheel 8-1. When the down-travel shift lever 2 is shifted and locked at the far right, the double gear 5-6 of the input shaft slides equidistantly to the same position along with the down-travel shift lever 2. At this time, the small gear of the double gear 6-1 of the down-travel shaft 6 meshes with the large gear of the input double gear 5-6 in the input shaft 5. When the clutch lever 1 is shifted, power is input, realizing the high-speed linkage mode of the multi-function output shaft assembly 4 and the rapid linkage mode of the down-travel shaft 6. The high-speed mode of the rear output shaft, matched with rapid travel, enables combined operations of ditching, spraying, and mulching with composite power agricultural implements.

[0031] like Figure 9 , Figure 9a As shown, when the multi-function output shaft shift lever 3 is slid to the left and locked at the leftmost position, the double gear 4-4 of the multi-function output shaft 4 slides equidistantly to the same position along with the multi-function output shaft shift lever 3. At the optimal meshing position, the double gear 4-4 of the multi-function output shaft meshes with the independent gear 5-5 of the input shaft via the idler wheel 8-1. That is, the small gear of the double gear 4-4 of the multi-function output shaft meshes with the independent gear 5-5 of the input shaft via the idler wheel 8-1. When the lower travel shift lever 2 is shifted and locked at the leftmost position, the double gear 5-6 of the input shaft slides equidistantly to the same position along with the lower travel shift lever 2. At this time, the large gear of the double gear 6-1 of the lower travel shaft 6 meshes with the small gear of the input double gear 5-6 in the input shaft 5. When the clutch lever 1 is shifted, power is input, realizing the high-speed linkage mode of the multi-function output shaft assembly 4 and the slow-speed linkage mode of the lower travel shaft 6. The high-speed output mode matched with the slow travel mode enables composite power agricultural implements for tasks such as ditching and fertilizing, and crop sowing.

[0032] like Figure 10As shown, when the multi-function output shaft shift lever 3 is locked in the middle position, the double gear 4-4 of the multi-function output shaft 4 slides equidistantly to the same position following the shift lever 3. When the down-travel shift lever 2 is shifted to the rightmost position, the double gear 5-6 of the input shaft slides equidistantly to the same position following the shift lever 2. The double gear 4-4 of the multi-function output shaft and the down-travel shaft 6-1 simultaneously mesh with the double gear 5-6 of the input shaft. That is, the small gear of the double gear 4-4 of the multi-function output shaft, the large gear of the double gear 6-1 of the down-travel shaft, and the small gear of the double gear 5-6 of the input shaft 5 mesh. When the clutch lever 1 is shifted, power is input, realizing the low-speed linkage mode of the multi-function output shaft assembly 4 and the slow-speed linkage mode of the down-travel shaft 6. The low-speed output mode, matched with the slow-travel mode, enables field management operations.

[0033] like Figure 11 , Figure 11a As shown; the reverse gear shaft assembly 7 is an elastic sliding wheel structure. When the reverse gear lever 7-1 is moved, the reverse double gear 7-3 is forced to slide towards the spring 7-2. The large gear of the double gear 6-1 connecting the lower travel shaft 6 and the small gear of the input double gear 5-6 in the input shaft 5 mesh. When the clutch lever 1 is moved, power is input to realize reverse transmission. When the reverse gear lever 7-1 is released, the force is released, the spring pushes away, and the reverse gear engagement ends.

[0034] The low-power agricultural multi-functional micro gearbox of this utility model mainly consists of a multi-functional output shaft sliding gear shifting mechanism, a separate multi-functional output shaft gear shifting control panel, a multi-functional output shaft, a lower travel shaft, a power input shaft, a reverse gear shaft, a gearbox main housing, and an internal gear transmission structure.

[0035] Furthermore, the multi-functional output shaft sliding gear shifting mechanism and control panel: Through the innovative multi-functional output shaft sliding gear shifting mechanism, combined with a separate multi-functional output shaft gear shifting control panel, the gear shifting operation of the multi-functional output shaft can be realized under the control of the control panel, providing suitable power output for different agricultural implement operations; see also Figure 12 , Figure 13 ; Multi-functional output shaft design: Within the same gearbox, the multi-functional output shaft utilizes an innovative gear ratio design to achieve high-speed, high-output operation at high gears and low-speed, low-output operation at low gears, meeting the speed and torque requirements of different operating scenarios. For example, when switching to low gear and low-speed operation, it outputs lower speed and higher torque, suitable for connecting to water pumps, peeling machines, etc.; when switching to high gear and high-speed operation, it can connect to sprayers, generators, etc.

[0036] Gearbox Output Modes: This gearbox can achieve multiple output modes within the same gearbox, including independent transmission output of the lower travel shaft, independent transmission output of the multi-function output shaft, and linked output of the lower travel shaft and the multi-function output shaft. These output modes can be flexibly switched according to actual operation needs. For example, when performing operations such as mulching, soil breaking and fine tillage, the slow travel speed independent output can be selected; when performing combined operations of furrowing, spraying and mulching with composite power implements, the linked output mode can be selected.

[0037] Transmission main housing: The transmission main housing adopts the innovative QT450 asymmetric thin-wall casting process, see [link / reference]. Figure 2f This casting method solves the problem of excessive weight in all-gray cast iron gearboxes, while avoiding the defects of aluminum housings being prone to cracking due to insufficient strength in mountainous farmland, thus improving the overall performance and durability of the gearbox.

[0038] Optimized transmission space: The transmission of the micro-tiller has been innovatively changed from the external belt pulley transmission that occupies a large space to the gear transmission inside the gearbox, which effectively reduces the size of the gearbox and makes low-power agricultural machinery more flexible and convenient in farmland operations.

Claims

1. A low-power, multi-functional micro gearbox for agricultural use, characterized in that, Includes a main housing, within which are arranged a multi-functional output shaft assembly, an input shaft assembly, a lower travel shaft assembly, a reverse gear shaft assembly, and an idler gear assembly; The multi-functional output shaft assembly includes an output shaft, on which an output double gear is provided; The input shaft assembly includes an input shaft, on which an independent gear and an input double gear are provided; The idler assembly includes an idler shaft, on which an idler wheel connected by a needle roller bearing is provided; The lower travel shaft assembly includes a lower travel shaft, on which a lower travel double gear is provided; A shift lever is installed on one side of the main housing, and the shift lever is used to move the output double gear; A clutch lever is installed on the other side of the main housing, the clutch lever being used to engage the clutch; The reverse gear lever is located on the same side as the clutch lever on the main housing, and it actuates the reverse gear shaft assembly. A downward travel lever is provided on the top of the main housing. The downward travel lever is used to move the input double gear. The input shaft assembly and the lower travel shaft assembly are mounted vertically, the reverse gear shaft assembly and the multi-function output shaft assembly are mounted on the left and right sides of the input shaft assembly and the lower travel shaft assembly, and the idler gear assembly is mounted between the output shaft assembly and the lower travel shaft assembly. The idler gear of the idler gear assembly is always meshed with the independent gear of the input shaft.

2. The low-power agricultural multi-functional micro gearbox as described in claim 1, characterized in that, Along the axial direction of the main housing, the output double gear includes a pinion and a large gear arranged in sequence; the input double gear includes a pinion and a large gear arranged in sequence, and both the pinion and the large gear of the input double gear are smaller than the independent gears; the downward travel double gear includes a large gear and a pinion arranged in sequence.

3. The low-power agricultural multi-functional micro gearbox as described in claim 1, characterized in that, The multi-functional output shaft has a splined end with a hole extending out of the main housing for connecting to the matching interface of multiple agricultural implements.

4. The low-power agricultural multi-functional micro gearbox as described in claim 1, characterized in that, The input shaft of the input shaft assembly is located above the center line of the main housing and on the center line of the gearbox.

5. A low-power agricultural multi-functional micro gearbox as described in claim 1, characterized in that, The main housing is made of QT450 asymmetric thin-walled casting.

6. A low-power agricultural multi-functional micro gearbox as described in claim 1, characterized in that, A bearing and oil seal are installed at one end of the input shaft, and a clutch shift fork is installed at the other end.

7. A low-power agricultural multi-functional micro gearbox as described in claim 1, characterized in that, The input shaft assembly, the multi-functional output shaft assembly, and the down-travel shaft assembly are arranged in a triangular structure.

8. A low-power agricultural multi-functional micro gearbox as described in claim 1, characterized in that, The lower travel shaft assembly is located at the lower part of the dividing line in the main housing.

9. A low-power agricultural multi-functional micro gearbox as described in claim 1, characterized in that, The reverse gear shaft assembly, input shaft assembly, and downdrive shaft assembly are arranged in a triangular structure.

10. A low-power agricultural multi-functional micro gearbox as described in claim 1, characterized in that, The idler assembly includes an idler shaft, on which an idler wheel connected by a needle roller bearing is provided; and idler baffles are provided on both sides of the idler wheel.

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