Front box gear transmission mechanism of mini-tiller

Abstract

The utility model relates to a mini-tiller front box gear transmission mechanism, which relates to the technical field of mini-tiller gearboxes, and comprises a front box, an input shaft horizontally arranged in the front box in a penetrating manner and an output shaft parallel to the input shaft, the output shaft is in transmission connection with the input shaft through a transmission assembly, and a transition shaft perpendicular to the output shaft is horizontally arranged in the front box in a penetrating manner. The transition shaft is in transmission connection with the output shaft through a bevel gear set, and a transition gear used for being meshed with gears in other box bodies is arranged on the transition shaft. The input shaft transmits power to the output shaft through the transmission assembly, the output shaft transmits the power to the transition shaft through the bevel gear set, the transition shaft rotates to drive the transition gear to rotate, and when other box bodies are externally connected, the transition gear is meshed with the gear with the transmission function in the other box bodies; a cutter shaft or a walking shaft can be meshed through the transition gear, and axial thrust is not generated, so that the transmission effect of the gearbox of the mini-tiller is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of gearboxes for micro-tillage machines, in particular to a front box gear transmission mechanism for micro-tillage machines. Background Art

[0002] The micro-tiller is an agricultural operating machinery powered by a small diesel engine or gasoline engine and driven by an integral speed change gear box or belt clutch. It has the characteristics of light weight, small size, simple structure, convenient operation, easy maintenance, stable and reliable operation, long service life, low fuel consumption and high production efficiency.

[0003] The transmission system of a micro-tiller usually includes an engine and a gearbox. The engine transmits power to the gearbox. The gearbox includes a front box and a rear box. The front box and the rear box are respectively connected to the tool box and the travel box through a transmission mechanism. The tool box is used to install the tilling blade assembly, and the travel box is used to install the travel wheels.

[0004] In the related art, reference can be made to the Chinese utility model patent with authorization announcement number CN213117324U, which discloses a transmission mechanism of a micro-tiller, including a main shaft, a secondary shaft, a bevel gear shaft, a driven bevel gear shaft and an output shaft, a multi-gear transmission is arranged between the main shaft, the secondary shaft and the bevel gear shaft, a first bevel gear shaft is arranged at the end of the bevel gear shaft, a second bevel gear and a third bevel gear are arranged at both ends of the driven bevel gear shaft, the second bevel gear is meshed with the first bevel gear, a fourth bevel gear is arranged on the output shaft, the fourth bevel gear is meshed with the third bevel gear, and the bevel gear shaft and the output shaft are parallel to each other.

[0005] The cutter is connected to the output shaft, and the power is transmitted to the cutter through the main shaft, counter shaft, bevel gear shaft, driven bevel gear shaft and output shaft in sequence. When the micro-tiller needs to be connected to new equipment, such as grass cutting, snow clearing, branch and leaf crushing, ditching, backfilling and other components, the output shaft is connected to the cutter and cannot be used as a power transmission shaft to transmit power to the new transmission box. If the driven bevel gear shaft is directly connected to the new transmission box, axial thrust will be generated, reducing the transmission effect, thereby reducing the transmission effect of the micro-tiller's gearbox. Utility Model Content

[0006] In order to improve the transmission effect of the gearbox of a micro-tillage machine, the utility model provides a front box gear transmission mechanism of the micro-tillage machine.

[0007] The present application provides a front box gear transmission mechanism for a micro-tillage machine, which adopts the following technical solution:

[0008] A front box gear transmission mechanism of a micro-tiller comprises a front box, an input shaft horizontally inserted into the front box and connected to input power, and an output shaft parallel to the input shaft, wherein the output shaft is connected to the input shaft through a transmission assembly, and a transition shaft perpendicular to the output shaft is also horizontally inserted into the front box, wherein the transition shaft is connected to the output shaft through a bevel gear set, and a transition gear is provided on the transition shaft for meshing with gears in other boxes.

[0009] By adopting the above technical solution, power is output to the input shaft, the input shaft transmits power to the output shaft through the transmission assembly, the output shaft transmits power to the transition shaft through the bevel gear set, the transition shaft rotates to drive the transition gear to rotate, when other boxes are connected externally, the transition gear is meshed with the gears with transmission function in the other boxes to realize power transmission to other boxes externally, and when no other boxes are needed to be connected externally, the tool shaft or the travel shaft can also be meshed through the transition gear, and no axial thrust is generated, thereby improving the transmission effect of the micro-tiller gearbox.

[0010] Optionally, the transmission assembly includes:

[0011] A transmission shaft, which is horizontally arranged in the front box and parallel to the input shaft, and is connected to the input shaft through a shift assembly;

[0012] The transmission gear is coaxially fixed on the output shaft and is in transmission connection with the transmission shaft.

[0013] By adopting the above technical solution, the input shaft transmits power to the transmission shaft through the shift assembly, the rotation of the transmission shaft drives the transmission gear to rotate, the rotation of the transmission gear drives the output shaft to rotate, and the output shaft transmits power to the transition shaft, thereby realizing power transmission.

[0014] Optionally, the shift assembly includes:

[0015] A double-speed gear, the double-speed gear is coaxially arranged on the input shaft, and the front box is provided with a shift fork for driving the double-speed gear to move along the axial direction of the input shaft;

[0016] A first gear, which is coaxially fixed on the transmission shaft and meshes with the transmission gear;

[0017] The second gear is coaxially fixed on the transmission shaft, the outer diameter of the first gear is larger than the outer diameter of the second gear, the first gear is meshed with one of the gears of the double-speed gear in the first gear, and the second gear is meshed with the other gear of the double-speed gear in the second gear.

[0018] By adopting the above technical solution, the rotation of the input shaft drives the double-speed gear to rotate, and the shift fork is turned to make the double-speed gear mesh with the first-gear gear. At this time, the second-gear gear is not meshed with the double-speed gear. The double-speed gear drives the transmission shaft to rotate through the first-gear gear. When changing gears, the shift fork is turned to drive the double-speed gear to disengage from the first-gear gear, so that the other gear of the double-speed gear meshes with the second-gear gear. The power is transmitted to the transmission shaft through the double-speed gear and the second-gear gear and drives the transmission shaft to rotate, so as to adapt to the requirements of different gears.

[0019] Optionally, the bevel gear set comprises:

[0020] An active bevel gear, wherein the active bevel gear is coaxially fixed on the output shaft;

[0021] The driven bevel gear is coaxially fixed on the transition shaft and meshes with the driving bevel gear.

[0022] By adopting the above technical solution, power is transmitted to the output shaft through the input shaft. The rotation of the output shaft drives the transition shaft to rotate through the active bevel gear and the driven bevel gear, and the transition shaft drives the transition gear to rotate, thereby realizing power transmission and power direction conversion between the output shaft and the transition shaft, reducing the probability of generating axial thrust when connected to other boxes, thereby improving transmission stability.

[0023] Optionally, support bearings are provided between the input shaft, the transmission shaft, the output shaft, the transition shaft and the front box.

[0024] By adopting the above technical solution, multiple support bearings respectively support the input shaft, the transmission shaft, the output shaft and the transition shaft to improve the stability of power transmission of the input shaft, the transmission shaft, the output shaft and the transition shaft.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] The power is output to the input shaft, and the input shaft transmits the power to the output shaft through the transmission assembly. The output shaft transmits the power to the transition shaft through the bevel gear set. The rotation of the transition shaft drives the transition gear to rotate. When other boxes are connected externally, the transition gear is engaged with the gears with transmission function in the other boxes to realize power transmission to other boxes. When there is no need to connect to other boxes externally, the tool shaft or travel shaft can also be engaged through the transition gear, and no axial thrust will be generated, thereby improving the transmission effect of the micro-tiller's gearbox. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall internal structure of the front box in this application;

[0028] Figure 2It is a schematic diagram of the positional relationship among the input shaft, the transmission shaft, the output shaft and the transition shaft in the present application;

[0029] Figure 3 It is a structural schematic diagram of the transmission assembly and the gear shift assembly in this application.

[0030] Figure numerals: 1, front box; 11, support bearing; 2, input shaft; 3, output shaft; 4, transmission assembly; 41, transmission shaft; 42, transmission gear; 5, transition shaft; 51, transition gear; 6, bevel gear set; 61, active bevel gear; 62, driven bevel gear; 7, shift assembly; 71, double-speed gear; 72, first gear gear; 73, second gear gear. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-3 This application is described in further detail.

[0032] The embodiment of the present application discloses a front box gear transmission mechanism of a micro-tiller.

[0033] Reference Figure 1 and Figure 2 A front box gear transmission mechanism of a micro-tiller comprises a front box 1, an input shaft 2 horizontally inserted in the front box 1 and connected to an input power, and an output shaft 3 parallel to the input shaft 2, the output shaft 3 is connected to the input shaft 2 through a transmission assembly 4, a transition shaft 5 perpendicular to the output shaft 3 is also horizontally inserted in the front box 1, the transition shaft 5 is connected to the output shaft 3 through a bevel gear set 6, and a transition gear 51 is provided on the transition shaft 5 for meshing with gears in other boxes.

[0034] Reference Figure 1 and Figure 2 The front box 1 has an opening at one end away from the input shaft 2, and the transition shaft 5 is arranged at the opening. When other boxes are connected externally, the other boxes can be a gear box or a travel box, etc. The other boxes are connected to the opening of the front box 1 so that the gears in the other boxes are meshed with the transition gear 51. When there is no need to connect other boxes externally, the tool shaft or the travel shaft can also be meshed through the transition gear 51.

[0035] Reference Figure 1 and Figure 3 The transmission assembly 4 includes a transmission shaft 41 and a transmission gear 42. The transmission shaft 41 is horizontally arranged in the front box 1 and is parallel to the output shaft 3. The transmission shaft 41 is transmission-connected to the input shaft 2 through the shift assembly 7. The transmission gear 42 is coaxially fixed on the output shaft 3 and transmission-connected to the transmission shaft 41.

[0036] Reference Figure 1 and Figure 2There are support bearings 11 between the input shaft 2, the transmission shaft 41, the output shaft 3, the transition shaft 5 and the front box 1. The multiple support bearings 11 respectively support the input shaft 2, the transmission shaft 41, the output shaft 3 and the transition shaft 5 to improve the stability of the transmission.

[0037] Reference Figure 1 and Figure 3 The shift assembly 7 includes a double-speed gear 71, a first-speed gear 72 and a second-speed gear 73. The double-speed gear 71 is coaxially arranged on the input shaft 2. The double-speed gear 71 rotates synchronously with the input shaft 2. A shift fork (not shown in the figure) is provided on the front box 1 to drive the double-speed gear 71 to move along the axial direction of the input shaft 2. The shift fork shifts the double-speed gear 71 without affecting the synchronous rotation of the double-speed gear 71 and the input shaft 2.

[0038] Reference Figure 1 and Figure 3 The first gear gear 72 is coaxially fixed on the transmission shaft 41 and meshes with the transmission gear 42. The second gear gear 73 is coaxially fixed on the transmission shaft 41. The outer diameter of the first gear gear 72 is larger than the outer diameter of the second gear gear 73. In the first gear, the first gear gear 72 meshes with one of the gears of the double-speed gear 71. In the second gear, the second gear gear 73 meshes with the other gear of the double-speed gear 71. During the operation of the micro-tillage machine, only one gear of the double-speed gear 71 can be in meshing state at a time.

[0039] Reference Figure 1 and Figure 2 The power input system transmits power to the input shaft 2. The rotation of the input shaft 2 drives the double-speed gear 71 to rotate. The double-speed gear 71 drives the transmission shaft 41 to rotate through the first gear 72 or the second gear 73. At the same time, the first gear 72 drives the output shaft 3 to rotate. The output shaft 3 rotates and transmits power to the transition shaft 5 through the bevel gear set 6.

[0040] Reference Figure 1 and Figure 2 The bevel gear set 6 includes an active bevel gear 61 and a driven bevel gear 62. The active bevel gear 61 is coaxially fixed on the output shaft 3, and the driven bevel gear 62 is coaxially fixed on the transition shaft 5 and meshes with the active bevel gear 61. In other embodiments, the output shaft 3 can be a bevel gear shaft, and the driven bevel gear 62 meshes with one end of the bevel gear shaft having a bevel gear structure.

[0041] Reference Figure 1 and Figure 2The output shaft 3 rotates to drive the transition shaft 5 to rotate through the active bevel gear 61 and the driven bevel gear 62, and the transition shaft 5 drives the transition gear 51 to rotate. When other boxes are connected externally, the other boxes are connected to the opening of the front box 1, so that the gears in the other boxes are meshed with the transition gear 51, and the next level of power transmission is performed through the transition gear 51, thereby realizing the power transmission of the micro-tillage machine gearbox to other boxes externally. When there is no need to connect other boxes externally, the tool shaft or the travel shaft can also be meshed through the transition gear 51, and no axial thrust will be generated, thereby improving the transmission effect of the micro-tillage machine gearbox.

[0042] The working principle of the embodiment of the present application is as follows:

[0043] The power input system transmits power to the input shaft 2. The rotation of the input shaft 2 drives the double-speed gear 71 to rotate. The double-speed gear 71 drives the transmission shaft 41 to rotate through the first gear 72 or the second gear 73. At the same time, the first gear 72 drives the output shaft 3 to rotate. The output shaft 3 rotates through the active bevel gear 61 and the driven bevel gear 62 to drive the transition shaft 5 to rotate. The transition shaft 5 drives the transition gear 51 to rotate. When other boxes are connected externally, the other boxes are connected to the opening of the front box 1, so that the gears in the other boxes are meshed with the transition gear 51, and the next level of power transmission is performed through the transition gear 51, thereby realizing the power transmission of the micro-tillage machine gearbox to other boxes. When there is no need to connect other boxes externally, the tool shaft or the travel shaft can also be meshed through the transition gear 51, and no axial thrust is generated, thereby improving the transmission effect of the micro-tillage machine gearbox.

[0044] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A front box gear transmission mechanism of a micro-tillage machine, characterized in that: The invention comprises a front box (1), an input shaft (2) horizontally inserted into the front box (1) and connected to input power, and an output shaft (3) parallel to the input shaft (2); the output shaft (3) is connected to the input shaft (2) by transmission through a transmission assembly (4); a transition shaft (5) perpendicular to the output shaft (3) is also horizontally inserted into the front box (1); the transition shaft (5) is connected to the output shaft (3) by transmission through a bevel gear set (6); and a transition gear (51) is provided on the transition shaft (5) for meshing with gears in other boxes.

2. The front box gear transmission mechanism of a micro-tillage machine according to claim 1, characterized in that: The transmission assembly (4) comprises: A transmission shaft (41), the transmission shaft (41) is horizontally arranged in the front box (1) and is parallel to the input shaft (2), and the transmission shaft (41) is connected to the input shaft (2) through a gear shift assembly (7); A transmission gear (42) is coaxially fixed on the output shaft (3) and is transmission-connected to the transmission shaft (41).

3. The front box gear transmission mechanism of a micro-tillage machine according to claim 2, characterized in that: The shift assembly (7) comprises: A double-speed gear (71), wherein the double-speed gear (71) is coaxially arranged on the input shaft (2), and the front box (1) is provided with a shift fork for driving the double-speed gear (71) to move along the axial direction of the input shaft (2); A first gear (72), the first gear (72) being coaxially fixed on the transmission shaft (41) and meshing with the transmission gear (42); A second gear (73) is coaxially fixed on the transmission shaft (41); the outer diameter of the first gear (72) is larger than the outer diameter of the second gear (73); in the first gear, the first gear (72) is meshed with one of the gears of the double-speed gear (71); in the second gear, the second gear (73) is meshed with the other gear of the double-speed gear (71).

4. The front box gear transmission mechanism of a micro-tillage machine according to claim 2, characterized in that: The bevel gear set (6) comprises: An active bevel gear (61), wherein the active bevel gear (61) is coaxially fixed on the output shaft (3); A driven bevel gear (62) is coaxially fixed on the transition shaft (5) and meshes with the driving bevel gear (61).

5. The front box gear transmission mechanism of a micro-tillage machine according to claim 2, characterized in that: Support bearings (11) are provided between the input shaft (2), the transmission shaft (41), the output shaft (3), the transition shaft (5) and the front box (1).

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