Low-power agricultural multifunctional miniature gearbox and control method

Abstract

The invention discloses a low-power agricultural multifunctional micro gearbox and a control method thereof, and the low-power agricultural multifunctional micro gearbox is characterized in that an innovative multifunctional output shaft sliding gear shifting mechanism, an independent control panel and a unique gear design are adopted; various variable-speed output modes such as independent output of the multifunctional output shaft, independent output of the walking shaft and linkage output of the multifunctional output shaft and the walking shaft can be achieved, one machine has multiple purposes, the power requirements of various agricultural implements can be met at the same time, and the economic and operation burden of farmers is relieved; meanwhile, the gearbox main shell is cast through an innovative QT450 asymmetric thin wall, and the defects that the weight of full gray cast iron is too large, and the strength of an aluminum alloy shell is insufficient are overcome; the gear speed change mechanism replaces an external belt pulley, the structure is compact, and the size of the gearbox is effectively reduced.

Description

Technical Field

[0001] The present invention relates to the field of agricultural machinery, and in particular to a multifunctional micro-gearbox suitable for low-power agricultural use and a control method thereof. Background Art

[0002] With the development of agricultural mechanization, low-power small agricultural machinery has been widely used in farmland operations and has been recognized by farmers. However, there are many different types of agricultural implements available. During operation, different agricultural implements sometimes require different power to complete the operation requirements; some agricultural implements require the power device to provide low speed, some agricultural implements require the power device to provide high speed, some agricultural implements also require a certain walking speed, and some agricultural implements require a combination of power. However, most of the functions of the existing gearbox structure are relatively simple, making it difficult to simultaneously meet the power requirements of multiple agricultural implements, that is, it cannot meet the needs of multiple speed change 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 to work in mountain farmland (such as aluminum housing), which is prone to problems such as bursting, seriously affecting the performance and service life of the micro-tiller. Summary of the Invention

[0003] In order to solve the technical problems existing in the prior art, the present invention aims to provide a low-power agricultural multifunctional micro-transmission and control method. By integrating the power of multiple agricultural implements and multiple power transmission platforms, power duplication is reduced, and the economic and operational burden on farmers is reduced. At the same time, through innovative design, the transmission volume is reduced, and the applicability of the transmission in farmland operations is improved. It also solves the problems existing in the existing transmission housing material and enhances the overall performance and durability of the transmission.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is as follows: In a first aspect, the present invention provides a low-power agricultural multifunctional micro-transmission, comprising a main housing, in which a multifunctional output shaft assembly, an input shaft assembly, a lower running shaft assembly, a reverse gear shaft assembly, and an idler assembly are arranged; The multifunctional output shaft assembly includes an output shaft, on which an output duplex gear is provided; The input shaft assembly includes an input shaft, on which an independent gear and an input duplex gear are provided; The idler assembly includes an idler shaft, on which an idler connected by a needle bearing is provided; The lower traveling shaft assembly comprises a lower traveling shaft, on which a lower traveling double gear is provided; A shift handle is installed on one side of the main housing, and the shift handle is used to shift the output double gear; A clutch lever is installed on the other side of the main housing, and the clutch lever is used to shift the clutch; The reverse gear lever is located at the rear of the main housing on the same side as the clutch lever, and the reverse gear lever drives the reverse gear shaft assembly; A lower travel shift lever is provided on the top of the main housing, and is used to shift the input double gear; The input shaft assembly and lower travel shaft assembly are mounted vertically, with the reverse gear shaft assembly and multi-function output shaft assembly mounted on the left and right sides of the input shaft assembly and lower travel shaft assembly. The idler gear assembly is mounted between the output shaft assembly and the lower travel shaft assembly, and the idler gear is constantly meshed with the independent gear of 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 the small gear and the large gear of the input double gear are both smaller than the independent gear; the lower walking double gear includes a large gear and a small gear arranged in sequence.

[0006] As a further technical solution, the shaft end of the multifunctional output shaft is a spline with a hole extending out of the main housing, and is used to connect 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 of gravity line of the gearbox.

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

[0009] In a second aspect, the present invention provides a control method for a low-power agricultural multifunctional micro-transmission. Specifically, the control method for the independent speed change output of the multifunctional output shaft is as follows: When low-speed agricultural implement output is required: the travel shift lever is lowered to lock the gear in the middle position; the shift handle is moved to the right, locking the gear at the rightmost position. The output duplex gear of the multi-function output shaft slides to the same position as the shift handle, with an equal distance. The large gear of the output duplex gear meshes with the small gear of the input duplex gear. At this time, the small gear of the input duplex gear meshes with the large gear of the output duplex gear, resulting in a transmission ratio greater than 1. When the clutch lever is moved, power is input, and the output shaft outputs a low speed. When high-speed agricultural implement output is required: the travel shift lever is lowered to lock the gear in the middle position; the shift handle is moved to the left and locked at the leftmost position, and the output duplex gear follows the shift handle and slides to the same position at an equal distance; the pinion of the output duplex gear of the multi-function output shaft is meshed with the independent gear on the input shaft, and the pinion of the output duplex gear of the multi-function output shaft is meshed with the independent gear on the input shaft through the idler gear, and the independent gear of the input shaft produces a transmission ratio of less than 1. When the clutch lever is moved, power is input and the output shaft outputs high speed.

[0010] In a third aspect, the present invention provides a control method for a low-power agricultural multifunctional micro-gearbox. Specifically, the control method for the individual speed change output of the traveling shaft is as follows: When it is necessary to output a slow travel speed, the shift handle is locked at the far right, and the lower travel shift lever is toggled to lock the gear at the far left, so that the input duplex gear slides to the same position with the same distance as the lower travel shift lever is toggled; at this time, the large gear of the travel duplex gear of the lower travel shaft assembly and the small gear of the input duplex gear are engaged, and the large gear of the input duplex gear cooperates with the small gear of the travel duplex gear for output. When the clutch lever is toggled, power is input and the travel shaft outputs the set speed; When it is necessary to output a fast walking speed, the shift handle is locked at the far right; the lower travel shift lever is moved to lock the gear at the far right, so that the input duplex gear slides to the same position at the same distance as the lower travel shift lever is moved; at this time, the small gear of the lower travel duplex gear and the large gear of the input duplex gear are engaged, and the large gear in the input duplex gear cooperates with the small gear in the lower travel duplex gear for output. When the clutch lever is moved, power is input and the travel shaft outputs the set speed.

[0011] In a fourth aspect, the present invention provides a control method for a low-power agricultural multifunctional micro-gearbox. Specifically, the control method of the linkage output is as follows: When the multi-function output shaft shift handle is slid to the right and locked at the rightmost position, the output duplex gear of the multi-function output shaft assembly follows the shift handle and slides to the same position at an equal distance; the small gear of the output duplex gear of the multi-function output shaft is meshed with the independent gear on the input shaft through the idler gear, and the lower travel shift lever is slid to the rightmost position and locked, so that the input duplex gear follows the lower travel shift lever and slides to the same position at an equal distance. At this time, the small gear of the lower travel duplex gear is meshed with the large gear of the input duplex gear. When the clutch lever is slid, power is input to realize the high-speed linkage mode of the multi-function output shaft assembly and the rapid linkage mode of the lower travel wheel shaft. The high-speed mode of the rear output shaft matches the rapid travel to realize the combined operation of ditching, spraying and film covering of the composite power agricultural implement.

[0012] In a fifth aspect, the present invention provides a control method for a low-power agricultural multifunctional micro-gearbox. Specifically, the control method of the linkage output is as follows: When the multi-function output shaft shift handle is slid to the left and locked at the leftmost position, the output duplex gear of the multi-function output shaft follows the shift handle to slide to the same position at an equal distance; the small gear of the output duplex gear of the multi-function output shaft is meshed with the independent gear on the input shaft through the idler gear, and the lower travel shift lever is slid to the leftmost position and locked, so that the input duplex gear follows the lower travel shift lever and slides to the same position at an equal distance. At this time, the large gear of the lower travel duplex gear is meshed with the small gear of the input duplex gear. When the clutch lever is slid, power is input to realize the high-speed linkage mode of the multi-function output shaft assembly and the slow-speed linkage mode of the lower travel wheel shaft. The rear output high-speed mode matches the slow-speed travel to realize the compound power agricultural implement ditching, fertilizing, and crop sowing operations.

[0013] The beneficial effects of the present invention are as follows: The present invention integrates a multifunctional output shaft assembly, an input shaft assembly, a lower travel shaft assembly, a reverse gear shaft assembly, and an idler assembly in a reduction gear box, and realizes multiple output modes and convenient shifting operations through the control of a shift handle, a clutch lever, a reverse gear lever, and a lower travel gear lever, thereby simplifying the operation process, reducing the operating burden, and meeting the demand for multiple speed shifting modes in complex farmland operation scenarios. At the same time, by integrating the power of multiple agricultural implements and multiple power transmission platforms, the need for farmers to purchase multiple agricultural implements is reduced, reducing the economic burden.

[0014] The multifunctional output shaft design and multiple output modes meet the needs of different farmland operation scenarios, improving the efficiency and applicability of agricultural implements. For example, it can provide appropriate power output under different operating speeds and torque requirements.

[0015] The transmission main housing is made of QT450 asymmetric thin-wall casting, which reduces weight while ensuring strength and solves the defects of existing housing materials; the internal gear transmission structure replaces the external pulley transmission, reducing the transmission volume and making the transmission structure more compact and reasonable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1a 、 Figure 1b is an isometric schematic diagram of the present invention; Figure 2 This is a schematic diagram of the cross-section distribution of the hole positions corresponding to the internal transmission positions of the present invention; Figure 2a is a schematic diagram of the multifunctional output shaft assembly of the present invention; Figure 2b is a schematic diagram of the input shaft assembly of the present invention; Figure 2c Schematic diagram of the lower traveling shaft assembly of the present invention; Figure 2d Schematic diagram of the reverse gear shaft assembly of the present invention; Figure 2e is a schematic diagram of the idler assembly of the present invention; Figure 2f This is a schematic cross-sectional view of the asymmetric thin-wall casting of the present invention; Figure 3 This is a schematic diagram of the full neutral position of the present invention; Figure 3a A schematic diagram of the clutch lever controlling the clutch of the present invention; Figure 4 This is a schematic diagram of the multifunctional shaft output low-speed transmission of the present invention; Figure 5 This is a schematic diagram of the high-speed transmission of the multifunctional output shaft of the present invention; Figure 5a This is a schematic diagram of the high-speed transmission idler gear state of the multifunctional output shaft of the present invention; Figure 6 This is a schematic diagram of the slow speed transmission of the lower walking shaft of the present invention; Figure 6a This is a schematic diagram of the slow output of the lower walking shaft of the present invention; Figure 7 This is a schematic diagram of the rapid transmission of the lower traveling shaft of the present invention; Figure 7a This is a schematic diagram of the quick output of the lower walking shaft of the present invention; Figure 8 This is a schematic diagram of the multifunctional output shaft high-speed mode matching walking fast combined transmission of the present invention; Figure 8a This is a schematic diagram of the high-speed transmission idler gear state of the multifunctional output shaft of the present invention; Figure 9 This is a schematic diagram of the multifunctional output shaft high-speed mode matching walking slow-speed combined transmission of the present invention; Figure 9a This is a schematic diagram of the high-speed transmission idler gear state of the multifunctional output shaft of the present invention; Figure 10 This is a schematic diagram of the multifunctional output shaft low-speed mode matching walking slow-speed combined transmission of the present invention; Figure 11 This is a schematic diagram of preparing or releasing the reverse gear of the present invention; Figure 11a This is a schematic diagram of the reverse gear transmission of the present invention; Figure 12 This is a schematic diagram of high-speed shifting of the multifunctional control panel of the present invention; Figure 13 This is a schematic diagram of low-speed shifting of the multifunctional control panel of the present invention; In the picture: 1. Clutch lever; 2. Lower travel shift lever; 3. Shift handle; 4. Multi-function output shaft assembly; 5. Input shaft assembly; 6. Lower travel shaft assembly; 7. Reverse gear shaft assembly; 8. Idle gear assembly; 9. Lower travel gearbox body; 10. Main housing; 11. Oil dipstick; 12. Transmission front cover; 13. Lower travel output shaft; 14. First hole; 15. Second hole; 16. Third hole; 17. Fourth hole; 18. Fifth hole; 19. Control panel; 4-1 Multi-function output shaft; 4-2 Oil seal; 4-3 Bearing; 4-4 Multi-function output shaft double gear; 4-5 Bearing; 5-1 Oil seal; 5-2 Bearing; 5-3 Clutch fork; 5-4 Clutch; 5-5 Input shaft independent gear; 5-6 Input shaft duplex 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 gear double gear; 7-4 Reverse gear shaft; 8-1 Idle pulley; 8-2 Idle pulley stopper; 8-3 Idle pulley shaft; 8-4 Needle roller bearing; 10-1 Asymmetric casting thin-wall cutting position; 10-2 Asymmetric casting thick-wall cutting position; DETAILED DESCRIPTION It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meaning as commonly understood by those skilled in the art to which the present invention belongs.

[0017] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless otherwise clearly indicated in the present invention, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "comprising" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or their combinations; For the convenience of description, if the words "up", "down", "left" and "right" appear in the present invention, they only indicate that they are consistent with the up, down, left and right directions of the drawings themselves, and do not limit the structure. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they cannot be understood as limiting the present invention.

[0018] like Figure 1a 、 Figure 1bAs shown, the low-power agricultural multifunctional micro-transmission disclosed in this embodiment includes a main housing 10, in which a multifunctional output shaft assembly 4, an input shaft assembly 5, a lower running shaft assembly 6, a reverse gear shaft assembly 7, and an idler assembly 8 are arranged; A transmission front cover 12 is mounted at the front end of the main housing 10, sealing the transmission as a cavity. The oil level is determined by an oil dipstick 11, sealing the transmission as a sealed cavity where the oil level can be measured. A low-power, agricultural, multifunctional miniature transmission, disclosed in the embodiment, is connected to the travel case 9 below. A multifunctional output shaft shift handle 3 is mounted on one side of the main housing 10, used to shift the dual gears on the multifunctional output shaft assembly 4. A clutch lever 1 is mounted on the other side of the main housing 10. This clutch lever 1 controls the clutch, connecting and disconnecting transmission power while the engine is running. Releasing the clutch lever 1 results in no transmission operation, while engaging the clutch lever activates the transmission. A reverse lever, mounted on the same side of the main housing as the clutch lever, shifts the reverse shaft assembly 7, disengaging the reverse gear. Releasing the reverse lever causes the reverse gear wheel to automatically retract, ending reverse gear.

[0019] A lower travel shift lever 2 is provided on the top of the main housing, and is used to shift the double gears 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; Figure 2 As shown, the multifunctional output shaft assembly 4 is placed in the fourth hole position 17, the input shaft assembly 5 is placed in the first hole position 14, the lower traveling shaft assembly 6 is installed in the third hole position 16, and the reverse gear shaft assembly 7 is installed in the second hole position 15. The multifunctional output shaft assembly 4, the input shaft assembly 5, the lower traveling shaft assembly 6, and the reverse gear shaft assembly 7 are arranged in a double-pinion planetary arrangement, and the structure is compact and reasonable; that is, the input shaft assembly 5 and the lower traveling shaft assembly 6 are installed up and down, and the reverse gear shaft assembly 7 and the multifunctional output shaft assembly 4 are installed on the left and right sides of the input shaft assembly 5 and the lower traveling shaft assembly 6; the idler assembly is installed between the output shaft assembly and the lower traveling shaft assembly, and the idler is always engaged with the independent gear of the input shaft.

[0020] like Figure 2 、 Figure 2b As shown, the input shaft assembly 5 is installed in the calculated first hole position 14, which is located above the centerline of the main housing and on the center of gravity, achieving optimal dynamic balancing. The input shaft assembly 5 includes an input shaft 5-8, on which are mounted a duplex gear 5-6 and an independent gear 5-5. A bearing 5-2 and an oil seal 5-1 are located at one end of the input shaft 5-8, and a clutch fork 5-3 is located at the other end. like Figure 2bAs shown, after bearing 5-2 is tightly fitted into first hole 14, oil seal 5-1 secures input shaft assembly 5 to the interior of main housing 10, making the input transmission more stable and balanced. Furthermore, input shaft assembly 5, multi-function output shaft assembly 4, and lower travel shaft assembly 6 form a herringbone structure, enabling them to operate in tandem. like Figure 2 、 Figure 2c As shown, the lower walking shaft assembly 6 is installed in the third hole position 16. The lower walking shaft assembly 6 includes a lower walking shaft, on which a double gear is provided. The position of the lower walking shaft assembly 6 is below the dividing line in the main housing; and it has a herringbone structure with the multi-functional output shaft assembly 4 and the input shaft assembly 5.

[0021] 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 running shaft 6 and the input shaft 5, the reverse gear shaft assembly 7, the input shaft assembly 5 and the lower running shaft assembly 6 form a herringbone structure, thereby generating a reverse gear shift. like Figure 2 、 Figure 2e As shown, the idler assembly 8 is installed in the fifth hole 18. By cooperating with the output shaft 4 and the input shaft 5, the idler assembly is installed between the output shaft assembly and the lower running shaft assembly. The idler is always engaged with the independent gear of the input shaft. When the upper gear of the output shaft 4 is moved by the shift handle to mate with the idler, 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, on which an idler 8-1 connected by a needle bearing 8-4 is provided; idler baffles 8-2 are provided on both sides of the idler 8-1 to prevent the idler from axially moving.

[0022] like Figure 2 、 Figure 2a As shown, the multifunctional output shaft assembly 4 includes a multifunctional output shaft 4-1, an oil seal 4-2, a bearing 4-3, a multifunctional output shaft duplex gear 4-4, and a bearing 4-5. The multifunctional output shaft duplex gear 4-4 is mounted on the multifunctional output shaft 4-1, with bearings 4-3, bearings 4-5, and an oil seal 4-2 mounted near each end. The end of the multifunctional output shaft 4-1 is splined with holes extending outside the main housing for connection to a matching interface of multiple agricultural implements. The multifunctional output shaft 4 is mounted within the main housing using a bi-stable structure on both sides, with the oil seal 4-2 sealing the shaft. The multifunctional output shaft assembly 4 forms a herringbone structure with the input shaft assembly 5 and the lower travel shaft assembly 6. The multifunctional output shaft duplex gear 4-4 is controlled by the multifunctional output shaft shift handle 3 to move on the multifunctional output shaft 4-1, and transmits power to the input shaft duplex gear 5-6 via 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 housing. This location is based on data collected from people's right-handed working habits. The location is preferably selected based on data from people's right-handed working habits. Later personalized design and customization vary and fall within the scope of this design.

[0023] like Figure 3 It is the full neutral state of all structures. In this state, when the engine is started and the engine rotates, the transmission still does not work when the clutch lever 1 is not moved, because the clutch 5-4 is in the disengaged state, and only the clutch fork 5-3 drives the clutch 5-4 in the disengaged state to rotate. Figure 3 become Figure 3a To shift the clutch lever 1, the clutch lever controls the clutch 5-4, which closes and connects to the clutch fork 5-3, thus connecting to the engine power. This is a safe connection method. After the equipment changes gears, shift the clutch lever to output power.

[0024] Specifically, the specific control process is described below in conjunction with the above device: Speed ​​Shifting: Taking a 4.0kW engine as an example, rated at 3600 rpm, when the actual speed is highest, the torque is minimum. This state cannot output practical power for agricultural implements, and the rated speed cannot output maximum torque. When the output speed is 2600 rpm, fuel efficiency is highest, and the engine actually outputs the maximum torque value.

[0025] The control method of the multi-function output shaft's independent speed-changing output is as follows: The speed of low-speed agricultural implements is mostly required to be 1100-1150 rpm, and the optimal transmission ratio is 2.294 / 1. Figure 4 As shown, the lower travel shift lever 2 is locked in the middle position. The multi-function output shaft shift handle 3 is slid rightward to the rightmost position, causing the multi-function output shaft duplex gear 4-4 to slide equidistantly to the same position as the multi-function output shaft shift handle 3. The multi-function output shaft duplex gear 4-4 directly meshes with the input shaft duplex gear 5-6 in the optimal meshing position. This means the large gear of the multi-function output shaft duplex gear 4-4 meshes with the small gear of the input shaft duplex gear 5-6. The small gear of the input shaft duplex gear 5-6 meshes with the large gear of the multi-function output shaft, creating a 2.294 / 1 transmission ratio. When the clutch lever 1 is moved, power is input. At maximum engine torque, the output is 1133 rpm. This low-speed operation is ideal for standalone use, such as when the machine is parked in the field or applying pesticides in an orchard. A barker can also be attached to the machine for operations such as barking and root removal.

[0026] High-speed agricultural implements usually require a speed of 3400-3500 rpm, with a transmission ratio of 1 / 1.333 being the preferred ratio. Figure 4 、 Figure 5 、 Figure 5a As shown, the lower travel shift lever 2 is locked in the middle position. The multi-function output shaft shift handle 3 is slid leftward, locking the gear in the leftmost position. The multi-function output shaft dual gear 4-4 slides equidistantly with the multi-function output shaft shift handle 3 to the same position. The multi-function output shaft dual gear 4-4 meshes with the input shaft independent gear 5-5 via the idler gear 8-1 in the optimal meshing position. This means that the pinion of the multi-function output shaft dual gear 4-4 meshes with the input shaft independent gear 5-5 via the idler gear 8-1. This creates a 1 / 1.333 transmission ratio, with the idler gear not affecting the transmission ratio. When the clutch lever 1 is moved, the output shaft 4 outputs a high-speed rotation of 3465 rpm at maximum engine torque. This allows for high speed operation alone, while low speed operation alone can be used. For example, the equipment can be parked at any location with water for pumping operations, or connected to a generator for field power generation.

[0027] The control method of the individual speed change output of the walking axis is as follows: like Figure 6 、 Figure 6a As shown, the multi-function output shaft shift handle 3 is locked at the far right. The lower travel shift lever 2 is toggled to lock the gear at the far left, causing the input shaft duplex gear 5-6 to slide to the same position with the same distance as the lower travel shift lever 2. At this time, the large gear of the duplex gear 6-1 of the lower travel shaft assembly 6 and the small gear of the input duplex gear 5-6 in the input shaft 5 are engaged, and the large gear of the input duplex gear 5-6 cooperates with the small gear of the travel duplex gear 6-1 for output. When the clutch lever 1 is toggled, power is input, as shown in FIG. Figure 6a The first-stage speed change connected to the lower walking shaft 6 is achieved through the 6-2 bevel gear shaft of the lower walking shaft and the lower walking box through the second-stage speed change, so that the rotating wheel shaft 13 outputs 70 rpm slow travel. At this time, the slow travel speed can be used alone and in conjunction with non-powered agricultural tools to achieve operations such as mulching, soil crushing and fine tillage.

[0028] like Figure 7 、 Figure 7a As shown, the multi-function output shaft shift handle 3 is locked at the far right. The travel shift lever 2 is toggled to the far right to lock the gear, causing the input shaft duplex gear 5-6 to slide to the same position with the same distance as the travel shift lever 2. At this time, the small gear of the duplex gear 6-1 and the large gear of the input duplex gear 5-6 in the input shaft 5 are meshed, and the large gear of the input duplex gear 5-6 cooperates with the small gear of the travel duplex gear 6-1 for output. When the clutch lever 1 is toggled, power is input, as shown in FIG. Figure 7aThe first-stage speed change connected to the lower walking shaft 4 is achieved through the 6-2 bevel gear shaft of the lower walking shaft and the lower walking box through the second-stage speed change, so that the rotating wheel shaft 13 outputs 115 rpm and travels fast. At this time, the fast travel can be used alone, and can be used with non-powered agricultural tools to achieve ordinary rotary tillage and other operations.

[0029] The control method of linkage output is as follows: like Figure 8 、 Figure 8a As shown, when the multi-function output shaft shift handle 3 is slid rightward and locked at the rightmost position, the duplex gear 4-4 of the multi-function output shaft assembly 4 slides equidistantly to the same position as the multi-function output shaft shift handle 3. The multi-function output shaft duplex gear 4-4 meshes with the independent gear 5-5 of the input shaft 5 via the idler gear 8-1 at the optimal meshing position. That is, the pinion of the multi-function output shaft duplex gear 4-4 meshes with the independent gear 5-5 of the input shaft via the idler gear 8-1. The lower travel shift lever 2 is moved to the rightmost position and locked, causing the input shaft duplex gear 5-6 to slide equidistantly to the same position as the lower travel shift lever 2. At this point, the pinion of the duplex gear 6-1 of the lower travel shaft 6 meshes with the large gear of the input duplex gear 5-6 of the input shaft 5. When the clutch lever 1 is moved, power is input, achieving a high-speed linkage mode between the multi-function output shaft assembly 4 and the lower travel shaft 6. The rear output shaft's high-speed mode matches the rapid travel, enabling combined furrowing, spraying, and mulching operations for the hybrid power agricultural implement.

[0030] like Figure 9 、 Figure 9a As shown, when the multi-function output shaft shift handle 3 is slid leftward and locked at the leftmost position, the duplex gear 4-4 of the multi-function output shaft 4 slides equidistantly to the same position as the multi-function output shaft shift handle 3. The multi-function output shaft duplex gear 4-4 meshes with the input shaft independent gear 5-5 via the idler gear 8-1 at the optimal meshing position. Specifically, the pinion of the multi-function output shaft duplex gear 4-4 meshes with the input shaft independent gear 5-5 via the idler gear 8-1. When the lower travel shift lever 2 is moved to the leftmost position and locked, the input shaft duplex gear 5-6 slides equidistantly to the same position as the lower travel shift lever 2. At this point, the large gear of the duplex gear 6-1 of the lower travel shaft 6 meshes with the small gear of the input duplex gear 5-6 of the input shaft 5. When the clutch lever 1 is moved, power is input, achieving a high-speed linkage mode between the multi-function output shaft assembly 4 and the slow-speed mode of the lower travel shaft 6. The rear output high-speed mode matches the slow-speed mode, enabling the combined power agricultural implement to perform operations such as furrowing, fertilizing, and crop sowing.

[0031] like Figure 10As shown, when the multifunctional output shaft shift handle 3 is turned to lock the gear in the middle, the double gear 4-4 of the multifunctional output shaft 4 follows the multifunctional output shaft shift handle 3 and slides to the same position at an equal distance. The lower travel shift lever 2 is turned to lock the gear at the far right, so that the input shaft double gear 5-6 follows the lower travel shift lever 2 and slides to the same position at an equal distance. The multifunctional output shaft double gear 4-4 and the lower travel shaft 6-1 are simultaneously engaged with the input shaft double gear 5-6, that is, the small gear of the multifunctional output shaft double gear 4-4, the large gear of the lower travel shaft double gear 6-1 and the small gear of the input double gear 5-6 in the input shaft 5 are engaged. After the clutch lever 1 is turned, power is input, realizing the low-speed linkage mode of the multifunctional output shaft assembly 4 and the slow-speed linkage mode of the lower travel wheel shaft 6. The rear output low-speed mode matches the slow travel speed to realize farm management operations.

[0032] 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 turned, the reverse gear double gear 7-3 is forced to slide toward one end of the spring 7-2, and the large gear of the double gear 6-1 connected to the lower walking shaft 6 and the small gear of the input double gear 5-6 in the input shaft 5 are engaged. When the clutch lever 1 is turned, power is input to achieve reverse transmission, and the reverse gear lever 7-1 is released, the force is released, the spring is pushed away, and the reverse gear engagement is completed.

[0033] The low-power agricultural multifunctional micro-transmission of the present invention mainly consists of a multifunctional output shaft sliding shift mechanism, a separate multifunctional output shaft speed shift control panel, a multifunctional output shaft, a lower travel shaft, a power input shaft, a reverse shaft, a transmission main housing and an internal gear shift structure.

[0034] Furthermore, the multifunctional output shaft sliding gear shift mechanism and control panel: Through the innovative multifunctional output shaft sliding gear shift mechanism, combined with a separate multifunctional output shaft speed shift control panel, the multifunctional output shaft can be shifted under the control of the control panel, providing appropriate power output for different agricultural implement operations; see Figure 12 、 Figure 13 ; Multi-function output shaft design: Utilizing innovative gear ratios within the same gearbox, the multi-function output shaft achieves both high-speed, high-output in high gears and low-speed, low-output in low gears, meeting the speed and torque requirements of various operating scenarios. For example, when operating in low gear and low speed, the output is lower speed and higher torque, enabling applications such as pumps and barkers; while when operating in high gear and high speed, it can be connected to applications such as sprayers and generators.

[0035] Transmission Output Modes: This transmission offers multiple output modes within the same transmission, including independent speed control for the lower travel shaft, independent speed control for the multi-function output shaft, and coordinated output for both the lower travel shaft and the multi-function output shaft. These output modes can be flexibly switched based on operational needs. For example, when performing operations such as mulching and tillage, slow travel speed control for independent output is available; while coordinated output mode is available for combined furrowing, spraying, and mulching operations using a hybrid power implement.

[0036] Gearbox main housing: The gearbox main housing adopts the innovative QT450 asymmetric thin-wall casting process, see Figure 2f This casting method solves the problem of the all-gray cast iron gearbox being too heavy, while avoiding the defect of the aluminum shell being prone to bursting due to insufficient working strength in mountain farmland, thereby improving the overall performance and durability of the gearbox.

[0037] Optimization of speed change space: The speed change area of ​​the micro-tiller is innovatively changed from the external pulley speed change that takes up a large space to the gear speed change 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 agricultural multifunctional micro-gearbox, characterized in that: It includes a main housing, in which a multifunctional output shaft assembly, an input shaft assembly, a lower running shaft assembly, a reverse gear shaft assembly, and an idler assembly are arranged; The multifunctional output shaft assembly includes an output shaft, on which an output duplex gear is provided; The input shaft assembly includes an input shaft, on which an independent gear and an input duplex gear are provided; The idler assembly includes an idler shaft, on which an idler connected by a needle bearing is provided; The lower traveling shaft assembly comprises a lower traveling shaft, on which a lower traveling double gear is provided; A shift handle is installed on one side of the main housing, and the shift handle is used to shift the output double gear; A clutch lever is installed on the other side of the main housing, and the clutch lever is used to shift the clutch; The reverse gear lever is located at the rear of the main housing on the same side as the clutch lever, and the reverse gear lever drives the reverse gear shaft assembly; A lower travel shift lever is provided on the top of the main housing, and is used to shift the input double gear; The input shaft assembly and the lower traveling shaft assembly are installed up and down, the reverse gear shaft assembly and the multi-function output shaft assembly are installed on the left and right sides of the input shaft assembly and the lower traveling shaft assembly, the idler assembly is installed between the output shaft assembly and the lower traveling shaft assembly, and the idler is always engaged with the independent gear of the input shaft.

2. A low-power agricultural multifunctional micro-gearbox as claimed in claim 1, characterized in that: Along the axial direction of the main housing, the output duplex gear includes a pinion and a large gear arranged in sequence; the input duplex gear includes a pinion and a large gear arranged in sequence, and the pinion and large gear of the input duplex gear are both smaller than the independent gear; the lower walking duplex gear includes a large gear and a pinion arranged in sequence.

3. A low-power agricultural multifunctional micro-gearbox as claimed in claim 1, characterized in that: The shaft end of the multifunctional output shaft is a spline with a hole extending out of the main housing and is used for connecting to a matching interface of multiple agricultural implements.

4. A low-power agricultural multifunctional micro-transmission as claimed 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 of gravity of the gearbox.

5. The low-power agricultural multifunctional micro-gearbox according to claim 1, characterized in that: The main shell is made of QT450 asymmetric thin-wall casting.

6. A control method for a low-power agricultural multifunctional micro-transmission according to any one of claims 1 to 5, characterized in that: The control method of the multi-function output shaft's independent speed-changing output is as follows: When low-speed agricultural implement output is required: lower the travel shift lever to the middle position to lock the gear; slide the shift handle to the right and lock the gear at the rightmost position. The output duplex gear of the multi-function output shaft will slide to the same position with the shift handle at an equal distance. The large gear of the output duplex gear meshes with the small gear of the input duplex gear; at this time, the small gear of the input duplex gear meshes with the large gear of the output duplex gear to produce a transmission ratio greater than 1. When the clutch lever is turned, power is input and the output shaft outputs a low speed; When high-speed agricultural implement output is required: lower the travel shift lever to the middle position to lock the gear; slide the shift handle to the left and lock the gear at the leftmost position. The output double gear will slide to the same position with the shift handle at an equal distance. The pinion of the output duplex gear of the multi-function output shaft meshes with the independent gear on the input shaft through the idler gear. The pinion of the output duplex gear of the multi-function output shaft and the independent gear of the input shaft produce a transmission ratio less than 1. When the clutch lever is turned, power is input and the output shaft outputs high speed.

7. A control method for a low-power agricultural multifunctional micro-transmission according to any one of claims 1 to 5, characterized in that: The control method of the individual speed change output of the walking axis is as follows: When it is necessary to output a slow travel speed, the shift handle is locked at the far right, and the lower travel shift lever is toggled to lock the gear at the far left, so that the input duplex gear slides to the same position with the same distance as the lower travel shift lever is toggled; at this time, the large gear of the travel duplex gear of the lower travel shaft assembly and the small gear of the input duplex gear are engaged, and the large gear of the input duplex gear cooperates with the small gear of the travel duplex gear for output. When the clutch lever is toggled, power is input and the travel shaft outputs the set speed; When it is necessary to output a fast walking speed, the shift handle is locked at the far right; the lower travel shift lever is moved to lock the gear at the far right, so that the input duplex gear slides to the same position at the same distance as the lower travel shift lever is moved; at this time, the small gear of the lower travel duplex gear and the large gear of the input duplex gear are engaged, and the large gear in the input duplex gear cooperates with the small gear in the lower travel duplex gear for output. When the clutch lever is moved, power is input and the travel shaft outputs the set speed.

8. A control method for a low-power agricultural multifunctional micro-transmission according to any one of claims 1 to 5, characterized in that: The control method of linkage output is as follows: When the multi-function output shaft shift handle is slid to the right and locked at the rightmost position, the output duplex gear of the multi-function output shaft assembly follows the shift handle and slides to the same position at an equal distance; the small gear of the output duplex gear of the multi-function output shaft is meshed with the independent gear of the input shaft, and the lower travel shift lever is slid to the rightmost position and locked, so that the input duplex gear follows the lower travel shift lever and slides to the same position at an equal distance. At this time, the small gear of the lower travel duplex gear is meshed with the large gear of the input duplex gear. When the clutch lever is slid, power is input to realize the high-speed linkage mode of the multi-function output shaft assembly and the rapid linkage mode of the lower travel wheel axle. The high-speed mode of the rear output shaft matches the rapid travel to realize the combined operation of ditching, spraying and film covering of the composite power agricultural implement.

9. A control method for a low-power agricultural multifunctional micro-transmission according to any one of claims 1 to 5, characterized in that: The control method of linkage output is as follows: When the multi-function output shaft shift handle is slid to the left and locked at the leftmost position, the output duplex gear of the multi-function output shaft follows the shift handle and slides to the same position at an equal distance; the small gear of the output duplex gear is meshed with the independent gear of the input shaft through the idler gear, and the lower travel shift lever is slid to the leftmost position and locked, so that the input duplex gear follows the lower travel shift lever and slides to the same position at an equal distance. At this time, the large gear of the lower travel duplex gear and the small gear of the input duplex gear are meshed. When the clutch lever is slid, power is input to realize the high-speed linkage mode of the multi-function output shaft assembly and the slow-speed linkage mode of the lower travel wheel shaft. The rear output high-speed mode matches the slow-speed travel to realize the compound power agricultural implement ditching, fertilizing, and crop sowing operations.

10. A control method for a low-power agricultural multifunctional micro-transmission according to any one of claims 1 to 5, characterized in that: The control method of linkage output is as follows: When the multi-function output shaft shift handle is turned to the middle lock position, the output duplex gear of the multi-function output shaft follows the shift handle and slides to the same position with equal distance; when the lower travel shift lever is turned to the rightmost lock position, the input duplex gear follows the lower travel shift lever and slides to the same position with equal distance; The small gear of the output double gear, the large gear of the lower walking double gear and the small gear of the input double gear are meshed. When the clutch lever is turned, power is input to realize the low-speed linkage mode of the multi-functional output shaft assembly and the slow-speed linkage mode of the lower walking wheel axle. The rear output low-speed mode matches the slow walking speed to realize farm management operations.

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