A gearbox for a mini-tiller

Abstract

The utility model relates to gearbox technical field especially relates to a gearbox for micro tiller, including the box, the inside input shaft, output shaft, transmission shaft, gear set and shift mechanism of box are established, the input shaft is installed to the box through bearing, transmission shaft and output shaft are arranged in parallel to input shaft and are installed to the box through bearing, still including the lubricating pipeline, the lubricating pipeline is fixedly arranged in the box inner chamber top, the oil pump and lubricating oil box are fixedly arranged in the box top outer wall, the oil pump oil inlet end is connected with lubricating oil box through the pipeline, the oil pump oil outlet end is connected with the upper end oil inlet end of lubricating pipeline through the pipeline, the bottom wall of lubricating pipeline is opened multiple groups of oil seepage holes, and multiple groups of oil seepage holes are correspondingly opened in the gear set top, a kind of gearbox for micro tiller of the utility model, the gearbox for micro tiller is through being arranged forced lubrication system, and lubricating oil can be evenly and continuously dropped on gear, effectively reduces the friction and wear between gear, greatly prolongs the service life of gearbox.

Description

Technical Field

[0001] This utility model relates to the field of gearbox technology, and in particular to a gearbox for a micro-tiller. Background Technology

[0002] In the field of agricultural machinery, mini tillers are an important type of tillage equipment and are widely used in farmland operations on various terrains. Among them, the gearbox is a key component of the mini tiller, and its performance directly affects the working efficiency and service life of the mini tiller. Most of the existing gearboxes for mini tillers adopt traditional lubrication methods, such as relying on the lubricating oil splashed up when the gears rotate for natural lubrication.

[0003] When the gearbox is in use, the mini tiller often needs to operate continuously for long periods of time in complex terrain conditions. In this application scenario, the existing lubrication method has exposed many problems. Due to the reliance on natural lubrication through gear splashing, the lubricating oil is difficult to evenly and continuously cover all gears. Especially during long-term continuous operation, the gears rotate at high speeds, and the friction between them intensifies. Natural lubrication cannot provide sufficient lubrication to the gears in a timely and effective manner. This leads to severe friction and wear between gears, and a large amount of heat accumulates, causing the gear temperature to rise sharply. Excessive temperature not only accelerates the fatigue damage of gear materials, but may also cause serious problems such as gear deformation and breakage, greatly shortening the service life of the gearbox, increasing equipment maintenance costs and downtime, and affecting the normal operation of agricultural production.

[0004] Therefore, to address the issue of extending the service life of the gearbox during long-term continuous operation, a gearbox for a mini-tiller can be designed. When the gearbox is in operation, an oil pump fixed to the top outer wall of the gearbox is activated to lubricate the gear set. The oil pump's inlet draws lubricating oil from the lubricating oil box through a pipe, and then the oil pump's outlet delivers the lubricating oil through a pipe to a lubrication pipe fixed to the top of the gearbox's inner cavity. After diversion, the lubricating oil flows evenly to both sides. Because the bottom wall of the lubrication pipe has multiple sets of seepage holes, the lubricating oil slowly seeps through these holes and drips onto the gear set, lubricating the gears. In summary, this gearbox for a mini-tiller, by setting up a forced lubrication system, greatly improves the working environment of the gears. The lubricating oil can drip evenly and continuously onto the gears, effectively reducing friction and wear between gears, reducing heat generated by friction, and preventing gear damage due to overheating. This not only significantly improves the gearbox's performance, making it smoother and more efficient during operation, but also greatly extends the gearbox's service life, making it particularly suitable for long-term continuous operation in complex terrain conditions. Utility Model Content

[0005] To overcome the problem that existing transmissions mostly rely on the lubricating oil splashed up when the gears rotate for natural lubrication, which makes it difficult for the lubricating oil to evenly and continuously cover all gears, resulting in severe friction and wear between gears and making it difficult to extend the service life of the transmission in long-term continuous operation scenarios.

[0006] The technical solution of this utility model is as follows: a gearbox for a micro-tiller, including a housing, an input shaft, an output shaft, a transmission shaft, a gear set and a shifting mechanism are arranged inside the housing. The input shaft is mounted on the housing through bearings. The transmission shaft and the output shaft are arranged parallel to the input shaft and mounted on the housing through bearings. It also includes a lubrication pipe. The lubrication pipe is fixedly arranged at the top of the inner cavity of the housing. An oil pump and a lubricating oil box are fixedly arranged on the outer wall of the top of the housing. The oil inlet of the oil pump is connected to the lubricating oil box through a pipe. The oil outlet of the oil pump is connected to the oil inlet at the top of the lubrication pipe through a pipe. Multiple sets of oil seepage holes are opened on the bottom wall of the lubrication pipe, and the multiple sets of oil seepage holes are correspondingly opened above the gear set.

[0007] Preferably, when the gearbox is working, during gear lubrication, an oil pump fixed to the top outer wall of the gearbox is activated. The oil pump's inlet draws lubricating oil from the lubricating oil box through a pipe, and then the oil pump's outlet delivers the lubricating oil through a pipe to a lubrication pipe fixed to the top of the gearbox's inner cavity. After diversion, the lubricating oil can flow evenly to both sides. Because the bottom wall of the lubrication pipe has multiple sets of seepage holes, the lubricating oil will slowly seep through these holes and drip onto the gear set, lubricating the gears. In summary, this gearbox for a micro-tiller, by setting up a forced lubrication system, greatly improves the working environment of the gears. The lubricating oil can drip evenly and continuously onto the gears, effectively reducing friction and wear between gears, reducing the heat generated by friction, and preventing gear damage due to overheating. This not only significantly improves the working performance of the gearbox, making it more stable and efficient during operation, but also greatly extends the service life of the gearbox, making it especially suitable for long-term continuous operation under complex terrain conditions.

[0008] As a preferred option, the lubrication pipeline adopts a Z-shaped pipeline structure, and each group of oil seepage holes has a multi-fine hole structure. The bottom three groups of oil seepage holes adopt a gradient design with smaller holes at the front and larger holes at the back along the pipeline flow direction. A triangular guide block is fixedly installed at the pipeline connection at the upper end of the inner cavity of the lubrication pipeline.

[0009] Preferably, the gear set includes a transmission gear, a driving gear, and a driven gear. The driving gear is fixedly sleeved on the side wall of the input shaft, multiple sets of driven gears are slidably sleeved on the side wall of the output shaft, and multiple sets of transmission gears are fixedly sleeved on the side wall of the transmission shaft.

[0010] Preferably, the driving gear meshes with one set of transmission gears, and multiple sets of transmission gears mesh with corresponding driven gears.

[0011] Preferably, the shifting mechanism includes a shift fork and a shift lever, with the shift lever installed inside the housing and the shift fork sleeved on the side wall of the shift lever.

[0012] Preferably, the shift fork is connected to the driven gear, and the shift lever is connected to the shift fork via a connecting rod.

[0013] The beneficial effects of this utility model are:

[0014] When the gearbox is working, during gear lubrication, an oil pump fixed to the top outer wall of the gearbox is activated. The oil pump's inlet draws lubricating oil from the lubricating oil box through a pipe, and then the oil pump's outlet delivers the lubricating oil through a pipe to the lubrication pipe fixed to the top of the gearbox's inner cavity. After diversion, the lubricating oil can flow evenly to both sides. Because there are multiple sets of oil seepage holes on the bottom wall of the lubrication pipe, the lubricating oil will slowly seep through these small holes and drip onto the gear set, lubricating the gears. In summary, this gearbox for a micro-tiller, by setting up a forced lubrication system, greatly improves the working environment of the gears. The lubricating oil can drip evenly and continuously onto the gears, effectively reducing friction and wear between the gears, reducing the heat generated by friction, and preventing gear damage due to overheating. This not only significantly improves the working performance of the gearbox, making it more stable and efficient during operation, but also greatly extends the service life of the gearbox, making it especially suitable for long-term continuous operation in complex terrain conditions. Attached Figure Description

[0015] Figure 1 The diagram shown is a first three-dimensional structural schematic of a gearbox for a micro-tiller according to the present invention.

[0016] Figure 2 The diagram shown is a half-section plan view of the gearbox housing of a micro-tiller according to this utility model.

[0017] Figure 3 The diagram shown is a three-dimensional half-section structural diagram of the gearbox housing for a micro-tiller according to this utility model.

[0018] Figure 4 The diagram shows a three-dimensional structural representation of the lubrication pipes, oil pump, and lubrication oil box assembly of a gearbox for a micro-tiller according to this utility model.

[0019] Figure 5 The diagram shown is a plan view of the combined lubrication pipes, oil pump, and lubrication oil box of a gearbox for a micro-tiller according to this utility model.

[0020] Figure 6 What is shown is Figure 5 Schematic diagram of the planar structure at the circled area;

[0021] Explanation of reference numerals in the attached drawings: 1. Housing; 2. Input shaft; 3. Output shaft; 4. Drive shaft; 5. Lubrication pipe; 6. Oil pump; 7. Lubricating oil box; 8. Oil seepage hole; 9. Triangular guide block; 10. Drive gear; 11. Driven gear; 12. Shift fork; 13. Shift lever; 14. Transmission gear. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Please see Figure 1 and Figure 4 This utility model provides an embodiment of a gearbox for a micro-tiller, comprising a housing 1, inside which are arranged an input shaft 2, an output shaft 3, a transmission shaft 4, a gear set, and a shifting mechanism. The input shaft 2 is mounted on the housing 1 via bearings. The transmission shaft 4 and the output shaft 3 are arranged parallel to the input shaft 2 and mounted on the housing 1 via bearings. The gearbox also includes a lubrication pipe 5, which is fixedly disposed at the top of the inner cavity of the housing 1. An oil pump 6 and a lubricating oil box 7 are fixedly disposed on the outer wall of the top of the housing 1. The oil inlet of the oil pump 6 is connected to the lubricating oil box 7 via a pipe, and the oil outlet of the oil pump 6 is connected to the upper oil inlet of the lubrication pipe 5 via a pipe. Multiple sets of oil seepage holes 8 are opened on the bottom wall of the lubrication pipe 5, and the multiple sets of oil seepage holes 8 are correspondingly opened above the gear set.

[0024] Please see Figure 5 and Figure 6 The lubrication pipe 5 adopts a Z-shaped pipe structure. Each set of oil seepage holes 8 has a multi-fine pore structure. The bottom three sets of oil seepage holes 8 adopt a gradient design with smaller holes at the front and larger holes at the back along the flow direction of the pipe. A triangular guide block 9 is fixedly installed at the pipe connection at the upper end of the inner cavity of the lubrication pipe 5. The flow is diverted by the triangular guide block 9 so that the lubricating oil can flow evenly to both sides. Since there are multiple sets of oil seepage holes 8 on the bottom wall of the lubrication pipe 5, and each set of oil seepage holes 8 has a multi-fine pore structure, the lubricating oil will slowly penetrate through these fine pores and drip onto the top of the gear set to lubricate the gears.

[0025] Please see Figure 2 and Figure 3 The gear set includes a transmission gear 14, a driving gear 10, and a driven gear 11. The driving gear 10 is fixedly sleeved on the side wall of the input shaft 2, and multiple sets of driven gears 11 are slidably sleeved on the side wall of the output shaft 3. Multiple sets of transmission gears 14 are fixedly sleeved on the side wall of the transmission shaft 4. The meshing of different transmission gears 14 with the driven gears 11 achieves the purpose of shifting gears and changing speed. The driving gear 10 meshes with one set of transmission gears 14, and multiple sets of transmission gears 14 mesh with the corresponding driven gears 11. Thus, the purpose of shifting gears and changing speed is achieved through the meshing of different transmission gears 14 with the driven gears 11.

[0026] Please see Figure 2 and Figure 3The shifting mechanism includes a shift fork 12 and a shift lever 13. The shift lever 13 is installed inside the housing 1, and the shift fork 12 is sleeved on the side wall of the shift lever 13. By operating the shift lever 13 installed inside the housing 1, the shift lever 13 drives the shift fork 12 sleeved on its side wall to move through the connecting rod. The shift fork 12 is connected to multiple sets of driven gears 11 that are slidably sleeved on the side wall of the output shaft 3, thereby driving the driven gears 11 to move, realizing the meshing of different transmission gears 14 with the driven gears 11, and achieving the purpose of shifting gears and changing speed. The shift fork 12 is connected to the driven gears 11. The shift lever 13 is connected to the shift fork 12 through the connecting rod. The shift lever 13 drives the shift fork 12 sleeved on its side wall to move through the connecting rod. The shift fork 12 is connected to multiple sets of driven gears 11 that are slidably sleeved on the side wall of the output shaft 3, thereby driving the driven gears 11 to move.

[0027] When the gearbox is working, the input shaft 2, output shaft 3, transmission shaft 4, gear set and shifting mechanism work together to achieve the speed change function. In terms of lubrication, when the gear set needs to be lubricated, the oil pump 6 fixed on the top outer wall of the gearbox 1 is started. The oil inlet end of the oil pump 6 draws lubricating oil from the lubricating oil box 7 through the pipeline. Then the oil outlet end of the oil pump 6 delivers the lubricating oil through the pipeline to the lubrication pipe 5 fixed on the top of the inner cavity of the gearbox 1.

[0028] The lubrication pipe 5 adopts a Z-shaped structure. A triangular guide block 9 is fixed at the pipe connection at the upper end of its inner cavity. After the lubricating oil enters the lubrication pipe 5, it is diverted by the triangular guide block 9 so that the lubricating oil can flow evenly to both sides. Since the bottom wall of the lubrication pipe 5 has multiple sets of oil seepage holes 8, and each set of oil seepage holes 8 has a multi-fine pore structure, the lubricating oil will slowly seep through these fine pores and drip onto the top of the gear set to lubricate the gears.

[0029] Meanwhile, to prevent excessive leakage of lubricating oil from the first hole during the flow process, which could lead to insufficient oil at the rear end, the three sets of oil seepage holes 8 at the bottom of the lubrication pipe 5 adopt a gradient design with smaller holes at the front and larger holes at the back along the flow direction of the pipeline. This ensures that the lubricating oil drips evenly onto each gear during the flow process.

[0030] When shifting gears, the shift lever 13 installed inside the housing 1 is operated. The shift lever 13 drives the shift fork 12 sleeved on its side wall to move through the connecting rod. The shift fork 12 is connected to multiple sets of driven gears 11 slidably sleeved on the side wall of the output shaft 3, thereby driving the driven gears 11 to move, realizing the meshing of different transmission gears 14 with the driven gears 11, and achieving the purpose of shifting gears and changing speed.

[0031] In summary, the gearbox of this mini-tiller, through the installation of a forced lubrication system, greatly improves the working environment of the gears. Lubricating oil can drip evenly and continuously onto the gears, effectively reducing friction and wear between them, lowering the heat generated by friction, and preventing gear damage due to overheating. This not only significantly improves the gearbox's performance, making it smoother and more efficient during operation, but also greatly extends its service life. It is especially suitable for long-term continuous operation in complex terrain conditions, reducing downtime for maintenance due to gearbox failure, improving the overall working efficiency and reliability of the mini-tiller, and providing strong support for agricultural production.

[0032] Through the above steps, when the gearbox is working and lubricating the gear set, the oil pump 6 fixed to the top outer wall of the housing 1 is activated. The oil inlet of the oil pump 6 draws lubricating oil from the lubricating oil box 7 through a pipe. Then, the oil outlet of the oil pump 6 delivers the lubricating oil through a pipe to the lubrication pipe 5 fixed to the top of the inner cavity of the housing 1. After diversion, the lubricating oil can flow evenly to both sides. Since there are multiple sets of oil seepage holes 8 on the bottom wall of the lubrication pipe 5, the lubricating oil will slowly seep through these holes and drip onto the gear set to lubricate the gears. In summary, the gearbox for this micro-tiller, by setting a forced lubrication system, greatly improves the working environment of the gears. The lubricating oil can drip evenly and continuously onto the gears, effectively reducing friction and wear between the gears, reducing the heat generated by friction, and avoiding damage to the gears due to overheating. This not only significantly improves the working performance of the gearbox, making it more stable and efficient during operation, but also greatly extends the service life of the gearbox, making it especially suitable for long-term continuous operation under complex terrain conditions.

[0033] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A gearbox for a micro-tiller, comprising a housing (1), wherein an input shaft (2), an output shaft (3), a transmission shaft (4), a gear set, and a shifting mechanism are disposed inside the housing (1), the input shaft (2) is mounted to the housing (1) via bearings, and the transmission shaft (4) and the output shaft (3) are arranged parallel to the input shaft (2) and mounted to the housing (1) via bearings, characterized in that: It also includes a lubrication pipe (5), a lubrication pipe (5) is fixedly installed on the top of the inner cavity of the box (1), an oil pump (6) and a lubricating oil box (7) are fixedly installed on the outer wall of the top of the box (1), the oil inlet end of the oil pump (6) is connected to the lubricating oil box (7) through a pipe, the oil outlet end of the oil pump (6) is connected to the upper oil inlet end of the lubrication pipe (5) through a pipe, and multiple sets of oil seepage holes (8) are opened on the bottom wall of the lubrication pipe (5), and the multiple sets of oil seepage holes (8) are correspondingly opened above the gear set.

2. The gearbox for a micro-tiller according to claim 1, characterized in that: The lubrication pipe (5) adopts a Z-shaped pipe structure. Each group of oil seepage holes (8) is a multi-fine hole structure. The bottom three groups of oil seepage holes (8) adopt a gradient design with smaller holes at the front and larger holes at the back along the flow direction of the pipeline. A triangular guide block (9) is fixedly installed at the pipe connection at the upper end of the inner cavity of the lubrication pipe (5).

3. The gearbox for a micro-tiller according to claim 1, characterized in that: The gear set includes a transmission gear (14), a driving gear (10) and a driven gear (11). The driving gear (10) is fixedly sleeved on the side wall of the input shaft (2), multiple sets of driven gears (11) are slidably sleeved on the side wall of the output shaft (3), and multiple sets of transmission gears (14) are fixedly sleeved on the side wall of the transmission shaft (4).

4. The gearbox for a micro-tiller according to claim 3, characterized in that: The driving gear (10) meshes with one of the transmission gears (14), and the multiple transmission gears (14) mesh with the corresponding driven gears (11).

5. A gearbox for a micro-tiller according to claim 1, characterized in that: The shifting mechanism includes a shift fork (12) and a shift lever (13). The shift lever (13) is installed inside the housing (1), and the shift fork (12) is sleeved on the side wall of the shift lever (13).

6. A gearbox for a micro-tiller according to claim 5, characterized in that: The shift fork (12) is connected to the driven gear (11), and the shift lever (13) is connected to the shift fork (12) via a connecting rod.

Images