Transmission case assembly of four-wheel drive mini-tiller

Abstract

The utility model relates to a transmission case assembly of a four-wheel drive mini-tiller, which relates to the technical field of mini-tillers and comprises a front case and a rear case, a main transmission shaft and a first output shaft are arranged in the front case, the first output shaft is connected with the main transmission shaft through a first gear shifting transmission mechanism, and an auxiliary transmission shaft and a second output shaft are arranged in the rear case. The second output shaft is in transmission connection with an auxiliary transmission shaft through a second gear shifting transmission mechanism, and a first gear meshed with the gear shaft is arranged on the auxiliary transmission shaft. Gear adjustment is carried out in the front box through the first gear shifting transmission mechanism, adjusted power is transmitted to the first output shaft, meanwhile, the main transmission shaft transmits the power to the auxiliary transmission shaft through the first gear, gear adjustment is carried out in the rear box through the second gear shifting transmission mechanism, and adjusted power is transmitted to the second output shaft. In this way, gear adjustment can be conducted on rotation of the tilling cutter and movement of the mini-tiller, the labor intensity of workers is reduced, and therefore the using convenience of the four-wheel-drive mini-tiller is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of micro-tillage machines, in particular to a transmission box assembly of a four-wheel drive micro-tillage machine. Background Art

[0002] A micro-tiller is a small tillage machine, which is mainly powered by a small diesel engine or gasoline engine. It drives the tillage blade assembly through a transmission system to till the land. The four-wheel drive micro-tiller is a type of micro-tiller. Its engine is directly connected to the gearbox, so it will not slip or idle on hard ground, and its performance is more stable.

[0003] A common four-wheel drive micro-tillage machine includes an engine system, a transmission box, a travel box, a tillage blade assembly, an operating armrest, etc. The engine system is connected to the transmission box or the travel box, one of which controls the movement of the micro-tillage machine, and the other controls the operation of the tillage blade assembly. The transmission box and the travel box are connected by a transmission shaft. Usually, the movement of the micro-tillage machine has a gear shift adjustment, while the rotation of the tillage blade does not have a gear shift adjustment. Therefore, the output torque of the tillage blade is fixed. For some lands with complex structures, such as land with loose soil in some parts and compact soil in other parts, and land with uneven soil or weeds in some parts, the operator is generally required to apply external force or use tools to assist the normal operation of the micro-tillage machine. However, manually applying external force makes the labor intensity high and the production efficiency low. If the external force is used improperly, it is easy to cause damage to the micro-tillage machine, thereby reducing the convenience of using the four-wheel drive micro-tillage machine. Utility Model Content

[0004] In order to improve the convenience of using a four-wheel drive micro-tillage machine, the utility model provides a transmission box assembly for the four-wheel drive micro-tillage machine.

[0005] The four-wheel drive micro-tillage machine transmission box assembly provided in this application adopts the following technical solution:

[0006] A transmission box assembly for a four-wheel drive micro-tiller comprises a front box and a rear box, wherein a main transmission shaft and a first output shaft are arranged in the front box, the first output shaft is connected to the main transmission shaft via a first gear shift transmission mechanism, an auxiliary transmission shaft and a second output shaft are arranged in the rear box, the second output shaft is transmission-connected to the auxiliary transmission shaft via a second gear shift transmission mechanism, the rear end of the main transmission shaft is a gear shaft and extends into the rear box, and a first gear meshing with the gear shaft is arranged on the auxiliary transmission shaft.

[0007] By adopting the above technical solution, the engine system transmits power to the main transmission shaft, and the gear is adjusted in the front box through the first gear shift transmission mechanism, and the adjusted power is transmitted to the first output shaft. At the same time, the main transmission shaft transmits power to the auxiliary transmission shaft through the first gear, and the gear is adjusted in the rear box through the second gear shift transmission mechanism, and the adjusted power is transmitted to the second output shaft. One of the first output shaft and the second output shaft is connected to the tiller blade assembly, and the other is connected to the walking mechanism, so that the gear can be adjusted for the rotation of the tiller blade and the movement of the micro-tiller, so as to reduce the intensity of manual labor, thereby improving the convenience of using the four-wheel drive micro-tiller.

[0008] Optionally, the first gear shift transmission mechanism includes:

[0009] A front box first gear, the front box first gear coaxially connected to the first output shaft;

[0010] A front box second gear, the front box second gear is coaxially fixed to the first output shaft and is spaced apart from the front box first gear;

[0011] A mounting sleeve, wherein the mounting sleeve is coaxially arranged on the main transmission shaft with the sliding sleeve;

[0012] Speed ​​gears, two of which are coaxially fixed to the mounting sleeve, and the two speed gears can mesh with the first gear and the second gear of the front box respectively;

[0013] In actual use, the mounting sleeve and the speed change gear are an integral double gear;

[0014] A reverse gear assembly, which is arranged in the front box and is drivingly connected to the first gear of the front box;

[0015] A first transmission assembly is disposed on the first output shaft and is used for outputting power.

[0016] By adopting the above technical solution, when the micro-tillage machine is working normally, the installation sleeve is shifted to slide on the main transmission shaft, so that the speed gear is meshed with the first gear gear of the front box or the second gear gear of the front box, the main transmission shaft rotates to drive the installation sleeve to rotate, the installation sleeve rotates to drive the speed gear to rotate, the speed gear rotates to drive the first gear gear of the front box or the second gear gear of the front box to rotate, thereby driving the first output shaft to rotate, the rotation direction of the first output shaft is opposite to the rotation direction of the main transmission shaft, the first output shaft rotates and outputs power to the walking mechanism through the first transmission component, when the gear position needs to be changed, the installation sleeve is shifted to make another speed gear mesh with the second gear gear of the front box or the first gear gear of the front box, when reverse gear is needed, the installation sleeve is shifted to make the speed gear not mesh with the first gear gear of the front box and the second gear gear of the front box, the reverse gear component is started to drive the first gear gear of the front box to reverse, and the first gear gear of the front box reversely drives the first output shaft to rotate in the opposite direction, thereby realizing the shifting and reverse gear of the micro-tillage machine, thereby improving the convenience of shifting the micro-tillage machine, and thus improving the convenience of using the four-wheel drive micro-tillage machine.

[0017] Optionally, the reverse gear assembly includes:

[0018] A reverse gear shaft, which is rotatably arranged in the front box, and is a gear shaft and meshes with the first gear of the front box;

[0019] The reverse gear is coaxially connected to the reverse gear shaft. When the micro-tillage machine is in the reverse gear state, one of the speed change gears is meshed with the reverse gear.

[0020] By adopting the above technical solution, when the micro-tiller is moving forward normally, the first output shaft rotates and drives the reverse gear shaft to rotate through the first gear of the front box. At this time, the reverse gear shaft is idling. When reverse gear is needed, the mounting sleeve is turned to drive the speed change gear to engage with the reverse gear. The main drive shaft rotates through the reverse gear to drive the reverse gear shaft to rotate in the opposite direction. The reverse gear shaft rotates to drive the first gear of the front box to rotate. The first gear of the front box drives the first output shaft to rotate. At this time, the rotation direction of the first output shaft is consistent with the rotation direction of the main drive shaft, thereby realizing the reverse gear of the micro-tiller, thereby improving the convenience of reverse gear of the micro-tiller.

[0021] Optionally, the first transmission assembly includes:

[0022] A first bevel gear, the first bevel gear is coaxially fixed to an end of the first output shaft away from the rear box;

[0023] The second bevel gear is meshed with the first bevel gear and is coaxially fixedly connected with a mounting shaft for facilitating mounting of accessories.

[0024] By adopting the above technical solution, the rotation of the first output shaft drives the first bevel gear to rotate, the rotation of the first bevel gear drives the second bevel gear to rotate, the second bevel gear rotates and transmits power to the accessories through the mounting shaft, thereby realizing the reversing transmission of power, thereby improving the convenience of power transmission of the micro-tiller, thereby improving the convenience of using the four-wheel drive micro-tiller.

[0025] Optionally, the second gear-changing transmission mechanism includes:

[0026] A duplex gear, wherein the duplex gear is coaxially fixedly connected to the secondary transmission shaft;

[0027] In actual use, the double gear can be changed into two or more gears;

[0028] A shift shaft, the shift shaft being rotatably disposed in the rear box and being located between the auxiliary transmission shaft and the second output shaft, and a coaxial sliding sleeve being provided on the shift shaft;

[0029] Two shift gears, the two shift gears are coaxially fixed to the sliding sleeve in sequence, and the two shift gears can mesh with the two gears of the double gear respectively;

[0030] In actual use, the sliding sleeve and the two shift gears can form an integral double gear; or the number of shift gears can be set to multiple, so that the sliding sleeve and the shift gears form an integral multi-gear, and the required different output speeds can be achieved by shifting.

[0031] A second transmission member is disposed on the second output shaft and is transmission-connected to the shift shaft.

[0032] By adopting the above technical solution, the main transmission shaft rotates and transmits power to the secondary transmission shaft through the first gear, the secondary transmission shaft rotates and drives the double gear to rotate, the sliding sleeve is moved on the shift shaft to slide, so that one of the shift gears is engaged with one of the gears in the double gear to drive the shift shaft to rotate, the shift shaft rotates and transmits power to the second output shaft through the second transmission member, the second output shaft transmits power to the tiller assembly, when gear shifting is required, the sliding sleeve is moved to make the other shift gear engage with the other gear in the double gear, when the tiller assembly is not needed to work, the sliding sleeve is moved to make the shift gear not engage with the double gear to achieve gear shifting of the tiller assembly, thereby reducing the labor intensity of manual labor and thereby improving the convenience of using the four-wheel drive micro-tillage machine.

[0033] Optionally, the end of the shift shaft away from the front box is a gear shaft, and the second transmission member is a transmission gear, which is coaxially fixed to the second output shaft and meshes with the gear shaft of the shift shaft.

[0034] By adopting the above technical solution, the secondary transmission shaft drives the shift shaft to rotate through the shift gear, the rotation of the shift shaft drives the transmission gear to rotate, and the transmission gear drives the second output shaft to rotate, thereby realizing power output.

[0035] Optionally, the rear box has a left side plate at one end close to the front box, the right ends of the main drive shaft, the first output shaft and the reverse gear shaft are passed through the left side plate and a first bearing is arranged between the left side plate, and the left ends of the auxiliary drive shaft, the second output shaft and the shift shaft are passed through the left side plate and a second bearing is arranged between the left side plate.

[0036] By adopting the above technical solution, multiple first bearings respectively support the right ends of the main transmission shaft, the first output shaft and the reverse gear shaft, and multiple second bearings respectively support the left ends of the auxiliary transmission shaft, the second output shaft and the shift shaft, thereby improving the stability of power transmission between the front box and the rear box, thereby improving the working stability of the four-wheel drive micro-tiller.

[0037] Optionally, the rear box has an end cover at one end away from the front box, and the auxiliary transmission shaft, the second output shaft and the right end of the shift shaft are inserted into the end cover and a third bearing is arranged between each of them and the end cover.

[0038] By adopting the above technical solution, multiple third bearings respectively support the auxiliary transmission shaft, the second output shaft and the right end of the shift shaft, thereby improving the stability of power transmission in the rear box, thereby improving the working stability of the four-wheel drive micro-tiller.

[0039] Optionally, a support is provided in the front box, the front end of the first output shaft is inserted into the support, and a support bearing for supporting the first output shaft and the first bevel gear is provided in the support.

[0040] By adopting the above technical solution, the support bearing supports the front end of the first output shaft and the first bevel gear, thereby improving the stability of power transmission in the front box, thereby improving the working stability of the four-wheel drive micro-tillage machine.

[0041] In summary, the present application includes at least one of the following beneficial technical effects:

[0042] The engine system transmits power to the main transmission shaft, and the gear is adjusted in the front box through the first gear shift transmission mechanism, and the adjusted power is transmitted to the first output shaft. At the same time, the main transmission shaft transmits power to the auxiliary transmission shaft through the first gear, and the gear is adjusted in the rear box through the second gear shift transmission mechanism, and the adjusted power is transmitted to the second output shaft. One of the first output shaft and the second output shaft is connected to the tilling blade assembly, and the other is connected to the walking mechanism, so that the gear can be adjusted for the rotation of the tilling blade and the movement of the micro-tiller, which reduces the labor intensity of manual labor and improves the convenience of using the four-wheel drive micro-tiller. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is the overall structure of this application;

[0044] Figure 2 is a cross-sectional view of the overall structure of the present application;

[0045] Figure 3 is a cross-sectional view of the second gear-changing transmission mechanism in the present application;

[0046] Figure 4 It is a structural cross-sectional view of the gearbox meshing with the second gear teeth of the front box in the present application;

[0047] Figure 5 It is a structural sectional view of the reverse gear assembly in this application.

[0048] Reference numerals: 1, front box; 11, main transmission shaft; 111, engine system; 12, first output shaft; 121, walking mechanism; 13, support; 131, support bearing; 132, load-bearing bearing; 14, shift paddle; 2, rear box; 21, auxiliary transmission shaft; 211, first gear; 22, second output shaft; 221, tiller assembly; 23, left side plate; 231, first bearing; 232, second bearing; 24, end cover; 241, third bearing; 3. First gearshift transmission mechanism; 31. First gear of front box; 32. Second gear of front box; 33. Mounting sleeve; 34. Speed ​​change gear; 35. Reverse gear assembly; 351. Reverse gear shaft; 352. Reverse gear; 36. First transmission assembly; 361. First bevel gear; 362. Second bevel gear; 363. Mounting shaft; 4. Second gearshift transmission mechanism; 41. Dual gear; 42. Speed ​​change shaft; 421. Sliding sleeve; 43. Speed ​​change gear; 44. Transmission gear. DETAILED DESCRIPTION

[0049] The following is combined with Figure 1-5 This application is described in further detail.

[0050] The embodiment of the present application discloses a transmission box assembly of a four-wheel drive micro-tillage machine.

[0051] Reference Figure 1 , Figure 2 and Figure 3 A transmission box assembly of a four-wheel drive micro-tillage machine includes a front box 1 and a rear box 2. A main transmission shaft 11 and a first output shaft 12 are arranged in the front box 1. The first output shaft 12 is connected to the main transmission shaft 11 through a first gear shift transmission mechanism 3. A secondary transmission shaft 21 and a second output shaft 22 are arranged in the rear box 2. The second output shaft 22 is connected to the secondary transmission shaft 21 through a second gear shift transmission mechanism 4. The rear end of the main transmission shaft 11 is a gear shaft and extends into the rear box 2. A first gear 211 meshing with the gear shaft is arranged on the secondary transmission shaft 21.

[0052] Reference Figure 1 and Figure 2 In the present application, the main transmission shaft 11 is connected to the engine system 111, and the first output shaft 12 is connected to the traveling mechanism 121, and the second output shaft 22 is connected to the tilling blade assembly 221 as an example for explanation. The engine system 111, the traveling mechanism 121 and the tilling blade assembly 221 are all common accessories in the micro-tillage machine, and they are not elaborated in the present application. In other embodiments, the first output shaft 12 may also be connected to the tilling blade assembly 221, and the second output shaft 22 may also be connected to the traveling mechanism 121.

[0053] Reference Figure 2 and Figure 3 The rear box 2 has a left side plate 23 at one end close to the front box 1, the main transmission shaft 11 is rotatably mounted on the inner wall of the front box 1 and horizontally penetrates the left side plate 23, the right end of the first output shaft 12 penetrates the left side plate 23, the first output shaft 12 is in a horizontal state, a support 13 is fixedly mounted on the inner bottom wall of the front box 1, and the front end of the first output shaft 12 penetrates the support 13.

[0054] Reference Figure 2 and Figure 3 The first gearshift transmission mechanism 3 includes a front box first gear 31, a front box second gear 32, a mounting sleeve 33, a speed gear 34, a reverse gear assembly 35 and a first transmission assembly 36. The front box first gear 31 and the front box second gear 32 are coaxially fixedly connected to the first output shaft 12 at intervals; the mounting sleeve 33 is coaxially slidingly arranged on the main transmission shaft 11 and rotates synchronously with the main transmission shaft 11. Two speed gears 34 are provided, and the two speed gears 34 are coaxially fixedly connected to the mounting sleeve 33 in sequence. The two speed gears 34 correspond to the front box first gear 31 and the front box second gear 32 respectively.

[0055] Reference Figure 1 , Figure 3 and Figure 4 A shift paddle 14 is installed on the front box 1 to drive the mounting sleeve 33 to slide. The connection between the shift paddle 14 and the mounting sleeve 33 is consistent with the mobile shift connection method of the micro-tillage machine in the prior art. The shift paddle 14 drives the mounting sleeve 33 to move, so that the speed gear 34 can be meshed with the corresponding front box first gear gear 31 or the front box 1 second gear gear.

[0056] Reference Figure 3 and Figure 5The reverse gear assembly 35 is arranged in the front box 1 and is transmission-connected with the front box first gear 31. The reverse gear assembly 35 includes a reverse gear shaft 351 and a reverse gear 352. The reverse gear shaft 351 is rotationally arranged in the front box 1 and the right end is horizontally penetrated in the left side plate 23. The axis connecting line of the main transmission shaft 11, the first output shaft 12 and the reverse gear shaft 351 is a triangle, and the axes of the main transmission shaft 11, the first output shaft 12 and the reverse gear shaft 351 are respectively located at the three vertices of the triangle. A plurality of first bearings 231 are arranged in the left side plate 23, and the plurality of first bearings 231 respectively support the right ends of the main transmission shaft 11, the first output shaft 12 and the reverse gear shaft 351. The reverse gear shaft 351 is a gear shaft and meshes with the front box first gear 31. The reverse gear 352 is coaxially fixed to the reverse gear shaft 351. When the micro-tillage machine is in the reverse gear state, one of the speed change gears 34 meshes with the reverse gear 352.

[0057] Reference Figure 1 , Figure 2 and Figure 3 The first transmission assembly 36 is arranged on the first output shaft 12 and is used to output power. The first transmission assembly 36 includes a first bevel gear 361 and a second bevel gear 362. The first bevel gear 361 is coaxially fixedly connected to the end of the first output shaft 12 away from the rear box 2, and the connecting part of the first bevel gear 361 and the first output shaft 12 is located in the support 13. A support bearing 131 for supporting the first output shaft 12 and the first bevel gear 361 is installed in the support 13. The left end of the reverse shaft 351 is penetrated in the support 13 and a load-bearing bearing 132 is arranged between the support 13; the second bevel gear 362 is located in the front box 1 and meshes with the first bevel gear 361. The second bevel gear 362 is coaxially fixedly connected with a vertical installation shaft 363, and the bottom end of the installation shaft 363 is used to install accessories such as the walking mechanism 121.

[0058] Reference Figure 1 , Figure 4 and Figure 5 The engine system 111 drives the main transmission shaft 11 to rotate, and takes the example of the speed gear 34 first meshing with the front box first gear 31 for explanation, the mounting sleeve 33 is turned to drive the speed gear 34 to mesh with the front box first gear 31, the main transmission shaft 11 rotates to drive the mounting sleeve 33 to rotate, the mounting sleeve 33 rotates and drives the first output shaft 12 to rotate through the front box first gear 31, the first output shaft 12 rotates and transmits power to the walking mechanism 121 through the first bevel gear 361 and the second bevel gear 362, when it is necessary to shift gears, the mounting sleeve 33 is turned to drive another speed gear 34 to mesh with the front box second gear 32, so as to shift gears, during which the shift shaft is driven by the first output shaft 12 to idle.

[0059] Reference Figure 1 , Figure 4 and Figure 5When reverse gear is needed, the mounting sleeve 33 is turned to drive one of the speed change gears 34 to move and engage with the reverse gear 352. The main transmission shaft 11 rotates to drive the mounting sleeve 33 to rotate. The mounting sleeve 33 rotates and drives the reverse gear shaft 351 to rotate through the reverse gear 352. The reverse gear shaft 351 rotates and drives the first output shaft 12 to rotate through the front box first gear 31, thereby realizing the reverse rotation of the first output shaft 12, thereby realizing the reverse gear of the four-wheel drive micro-tillage machine, thereby improving the convenience of using the four-wheel drive micro-tillage machine.

[0060] Reference Figure 2 and Figure 3 At the same time, the main transmission shaft 11 rotates to drive the first gear 211 to rotate, and the first gear 211 drives the auxiliary transmission shaft 21 to rotate, and the auxiliary transmission shaft 21 transmits power to the second output shaft 22 through the second gear shift transmission mechanism 4, and the second output shaft 22 transmits power to the tiller assembly 221; the left ends of the auxiliary rotating shaft and the second output shaft 22 are both penetrated into the left side plate 23, and the end of the rear box 2 away from the front box 1 has an end cover 24, and the right ends of the auxiliary transmission shaft 21 and the second output shaft 22 are both penetrated into the end cover 24, and the auxiliary transmission shaft 21 and the second output shaft 22 are both in a horizontal state.

[0061] Reference Figure 2 and Figure 3 The second gear shift transmission mechanism 4 includes a double gear 41, a shift shaft 42, two shift gears 43 and a second transmission member. The double gear 41 is coaxially fixed to the secondary transmission shaft 21. The two gears of the double gear 41 have the same module but inconsistent number of teeth. The shift shaft 42 is rotatably arranged in the rear box 2 and is in a horizontal state. The left end of the shift shaft 42 is penetrated into the left side plate 23, and a plurality of second bearings 232 are installed in the left side plate 23. The plurality of second bearings 232 respectively support the secondary transmission shaft 21, the second output shaft 22 and the left end of the shift shaft 42. The right end of the shift shaft 42 is penetrated into the end cover 24, and a plurality of third bearings 241 are installed in the end cover 24. The plurality of third bearings 241 respectively support the right end of the secondary transmission shaft 21, the second output shaft 22 and the shift shaft 42.

[0062] Reference Figure 2 and Figure 3 A coaxial sliding sleeve 421 is provided on the shift shaft 42, and the sliding sleeve 421 rotates synchronously with the shift shaft 42. A shift paddle 14 for sliding the sliding sleeve 421 is installed on the rear box 2. The connection between the shift paddle 14 and the sliding sleeve 421 is consistent with the mobile shift connection method of the micro-tiller in the prior art; the two shift gears 43 are coaxially fixed to the sliding sleeve 421 in sequence, and the two shift gears 43 correspond to the two gears of the double gear 41 one by one. By moving the sliding sleeve 421 with the shift paddle 14, the two shift gears 43 can be respectively meshed with the two gears of the double gear 41.

[0063] Reference Figure 2 and Figure 3 The second transmission member is arranged on the second output shaft 22 and is connected to the gear shaft 42. The end of the gear shaft 42 away from the front box 1 is a gear shaft. The second transmission member is a transmission gear 44. The transmission gear 44 is coaxially fixed to the second output shaft 22 and meshes with the gear shaft of the gear shaft 42.

[0064] Reference Figure 2 and Figure 3 , the main transmission shaft 11 rotates and drives the secondary transmission shaft 21 to rotate through the first gear 211, and the sliding sleeve 421 is turned so that one of the shift gears 43 is meshed with a gear of the double gear 41, and the secondary transmission shaft 21 rotates to drive the sliding sleeve 421 to rotate, and the sliding sleeve 421 drives the shift shaft 42 to rotate through the shift gear 43 and the double gear 41, and the shift shaft 42 rotates to drive the transmission gear 44 to rotate, and the transmission gear 44 rotates to drive the second output shaft 22 to rotate, and the second output shaft 22 transmits power to the tiller assembly 221 to work. When shifting is required, the sliding sleeve 421 is turned so that another shift gear 34 is meshed with another gear of the double gear 41 to achieve shifting. When the tiller assembly 221 does not need to work, the sliding sleeve 421 is turned so that the two shift gears 43 are not meshed with the double gear 41. At this time, the secondary transmission shaft 21 is idling, so as to achieve the gear adjustment of the tiller rotation, thereby improving the convenience of using the four-wheel drive micro-tillage machine.

[0065] The working principle of the embodiment of the present application is as follows:

[0066] The engine system 111 drives the main transmission shaft 11 to rotate, and the mounting sleeve 33 is turned to drive the speed change gear 34 to mesh with the first gear 31 of the front box. The rotation of the main transmission shaft 11 drives the mounting sleeve 33 to rotate. The mounting sleeve 33 rotates and drives the first output shaft 12 to rotate through the first gear 31 of the front box. The first output shaft 12 rotates and transmits power to the walking mechanism 121 through the first bevel gear 361 and the second bevel gear 362. When it is necessary to shift gears, the mounting sleeve 33 is turned to drive another speed change gear 34 to mesh with the second gear 32 of the front box, so that Shifting is performed, during which the shift shaft is driven by the first output shaft 12 to idle; when reverse gear is required, the mounting sleeve 33 is turned to drive one of the speed gears 34 to move and engage with the reverse gear 352, the main transmission shaft 11 rotates to drive the mounting sleeve 33 to rotate, the mounting sleeve 33 rotates and drives the reverse shaft 351 to rotate through the reverse gear 352, the reverse shaft 351 rotates and drives the first output shaft 12 to rotate through the front box first gear 31, thereby realizing the reverse rotation of the first output shaft 12, thereby realizing the reverse gear of the four-wheel drive micro-tiller.

[0067] The main transmission shaft 11 rotates and drives the secondary transmission shaft 21 to rotate through the first gear 211, and the sliding sleeve 421 is moved so that one of the shift gears 43 is meshed with one of the gears of the double gear 41. The rotation of the secondary transmission shaft 21 drives the sliding sleeve 421 to rotate. The sliding sleeve 421 drives the shift shaft 42 to rotate through the shift gear 43 and the double gear 41. The rotation of the shift shaft 42 drives the transmission gear 44 to rotate. The rotation of the transmission gear 44 drives the second output shaft 22 to rotate. The second output shaft 22 transmits power to the tiller assembly 221 for When the tiller blade assembly 221 is not required to work, the sliding sleeve 421 is moved so that the two shift gears 43 are not engaged with the double gear 41. At this time, the secondary transmission shaft 21 idles, so as to achieve the gear adjustment of the tiller blade rotation; in this way, the gear adjustment can be performed for the rotation of the tiller blade and the movement of the four-wheel drive micro-tiller, which reduces the labor intensity and improves the convenience of using the four-wheel drive micro-tiller.

[0068] 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 transmission box assembly for a four-wheel drive micro-tillage machine, characterized in that: The invention comprises a front box (1) and a rear box (2), wherein a main transmission shaft (11) and a first output shaft (12) are arranged in the front box (1), wherein the first output shaft (12) is connected to the main transmission shaft (11) via a first gear shift transmission mechanism (3), wherein a secondary transmission shaft (21) and a second output shaft (22) are arranged in the rear box (2), wherein the second output shaft (22) is transmission-connected to the secondary transmission shaft (21) via a second gear shift transmission mechanism (4), wherein the rear end of the main transmission shaft (11) is a gear shaft and extends into the rear box (2), and wherein a first gear (211) meshing with the gear shaft is arranged on the secondary transmission shaft (21).

2. The transmission box assembly of the four-wheel drive micro-tillage machine according to claim 1 is characterized in that: The first gear-changing transmission mechanism (3) comprises: A front box first gear (31), wherein the front box first gear (31) is coaxially fixedly connected to the first output shaft (12); A second gear of the front box (1), the second gear of the front box (1) being coaxially fixedly connected to the first output shaft (12) and spaced apart from the first gear of the front box (31); A mounting sleeve (33), wherein the mounting sleeve (33) is coaxially arranged on the main transmission shaft (11) with the sliding sleeve; Speed ​​change gears (34), two of which are coaxially fixed to the mounting sleeve (33), and the two speed change gears (34) can respectively mesh with the first gear (31) of the front box and the second gear (1) of the front box; A reverse gear assembly (35), the reverse gear assembly (35) being arranged in the front box (1) and being drivingly connected to the first gear (31) of the front box; A first transmission assembly (36), wherein the first transmission assembly (36) is arranged on the first output shaft (12) and is used for outputting power.

3. The transmission box assembly of the four-wheel drive micro-tillage machine according to claim 2 is characterized in that: The reverse gear assembly (35) comprises: A reverse gear shaft (351), the reverse gear shaft (351) being rotatably disposed in the front box (1), the reverse gear shaft (351) being a gear shaft and meshing with the first gear (31) of the front box; A reverse gear (352) is coaxially fixedly connected to the reverse gear shaft (351); when the micro-tillage machine is in a reverse gear state, one of the speed change gears (34) meshes with the reverse gear (352).

4. The transmission box assembly of the four-wheel drive micro-tillage machine according to claim 3 is characterized in that: The first transmission assembly (36) comprises: A first bevel gear (361), the first bevel gear (361) being coaxially fixedly connected to an end of the first output shaft (12) away from the rear box (2); The second bevel gear (362) is meshed with the first bevel gear (361) and is coaxially fixedly connected with a mounting shaft (363) for facilitating the installation of accessories.

5. The transmission box assembly of the four-wheel drive micro-tillage machine according to claim 3 is characterized in that: The second gear-changing transmission mechanism (4) comprises: A double gear (41), wherein the double gear (41) is coaxially fixedly connected to the secondary transmission shaft (21); A shift shaft (42), the shift shaft (42) being rotatably disposed in the rear box (2) and being located between the secondary transmission shaft (21) and the second output shaft (22), and a coaxial sliding sleeve (421) being provided on the shift shaft (42); Two shift gears (43), the two shift gears (43) are coaxially fixedly connected to the sliding sleeve (421) in sequence, and the two shift gears (43) can respectively mesh with two gears of the double gear (41); A second transmission member is arranged on the second output shaft (22) and is transmission-connected to the gearshift shaft (42).

6. The transmission box assembly of the four-wheel drive micro-tillage machine according to claim 5 is characterized in that: The end of the shift shaft (42) away from the front box (1) is a gear shaft, and the second transmission member is a transmission gear (44). The transmission gear (44) is coaxially fixed to the second output shaft (22) and meshes with the gear shaft of the shift shaft (42).

7. The transmission box assembly of the four-wheel drive micro-tillage machine according to claim 5 is characterized in that: The rear box (2) has a left side plate (23) at one end close to the front box (1); the right ends of the main transmission shaft (11), the first output shaft (12) and the reverse gear shaft (351) are inserted into the left side plate (23) and a first bearing (231) is arranged between the left side plate (23); the left ends of the auxiliary transmission shaft (21), the second output shaft (22) and the shift shaft (42) are inserted into the left side plate (23) and a second bearing (232) is arranged between the left side plate (23).

8. The transmission box assembly of the four-wheel drive micro-tillage machine according to claim 5 is characterized in that: The rear box (2) has an end cover (24) at one end away from the front box (1); the auxiliary transmission shaft (21), the second output shaft (22) and the right end of the shift shaft (42) are inserted into the end cover (24) and a third bearing (241) is arranged between the end cover (24).

9. The transmission box assembly of the four-wheel drive micro-tillage machine according to claim 3 is characterized in that: A support (13) is arranged in the front box (1), the front end of the first output shaft (12) is inserted into the support (13), and a support bearing (131) for supporting the first output shaft (12) and the first bevel gear (361) is arranged in the support (13).

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