CN213907351U

CN213907351U - Rotary tiller for walking tractor

Info

Publication number: CN213907351U
Application number: CN202022827701.6U
Authority: CN
Inventors: 陈永生; 谢虎; 王国俊; 陈明江; 韩柏和; 王振伟; 赵维松; 吴爱兵; 马标; 许斌星
Original assignee: YANCHENG BENNIU TRACTOR CO Ltd; Nanjing Research Institute for Agricultural Mechanization Ministry of Agriculture
Current assignee: YANCHENG BENNIU TRACTOR CO Ltd; Nanjing Research Institute for Agricultural Mechanization Ministry of Agriculture
Priority date: 2020-11-30
Filing date: 2020-11-30
Publication date: 2021-08-10
Anticipated expiration: 2030-11-30

Abstract

The invention discloses a rotary tiller matched with a walking tractor, comprising a tractor body and a rotary tiller connected with the tractor body. The tractor body comprises a gearbox, and the gearbox is connected with the rotary tiller through a pair of double gears. The rotary tiller comprises a rotary tiller body, a transition shaft, a pear knife shaft and a pear knife, and the purpose of driving the pear knife shaft to rotate through gear transmission, thereby realizing the high and low speed rotation of the pear knife. The rotary tiller matched with the walk-behind tractor of the present invention can adjust the rotation of the pear knife shaft by sliding the twelfth gear, so as to realize two states of high speed and low speed, adapt to the rotary tillage of a large area of rice, and has high efficiency and good reliability. ; At the same time, a new gearbox is designed, yes, the walk-behind tractor has changed from two-wheel drive to four-wheel drive, which is more conducive to working in various rice fields.

Description

Rotary cultivator matched with walking tractor

Technical Field

The invention relates to a rotary cultivator matched with a walking tractor, belonging to the field of agricultural machinery.

Background

With the development of the Chinese reform, the form of farmer planting field in China has changed greatly, and agricultural machinery develops toward the direction of specialty, high efficiency, reliability, durability and economy. Taking traditional rice planting in China as an example, agricultural machinery walking tractors are eliminated by efficient wheel tractors, the horsepower of the wheel tractors is 120-160 horsepower, and the horsepower of the wheel tractors is 100-200 mu per one-day flat field. However, due to unreasonable structural design, the bottom layer soil below 150 mm in the field planted with rice in the south is damaged, the soil layer above 150 mm is thicker and thicker, which reaches about 300 mm at present, and the wheel tractor cannot move when falling into the field and being trapped in the ground. The crawler tractor also has similar problems, and because the loose soil layer is too thick, the wheel tractor and the crawler tractor are easy to sink into the loose soil layer, so that the use of large machinery is limited.

Disclosure of Invention

The purpose of the invention is as follows: in order to overcome the defects in the prior art, the invention provides the rotary cultivator matched with the walking tractor, and the rotary cultivator transmission and the rotary cultivator frame are redesigned, so that the rotary cultivation efficiency and reliability are greatly improved, and the rotary cultivator is suitable for being used in paddy fields in the south.

The technical scheme is as follows: in order to solve the technical problem, the rotary cultivator matched with the walking tractor comprises a tractor body and a rotary cultivator connected with the tractor body, wherein the tractor body comprises a gearbox, the gearbox is connected with the rotary cultivator through a pair of duplicate gears, the rotary cultivator comprises a rotary cultivator body, a transition shaft, a pear cutter shaft and a pear cutter, an eighth spline shaft and a ninth spline shaft are arranged on the rotary cultivator body, an eleventh gear and a twelfth gear are arranged on the eighth spline shaft, a duplicate large-end gear and a duplicate small-end gear are arranged at two ends of the duplicate gear, a jaw is arranged on one surface of the eleventh gear, which is opposite to the twelfth gear, the eleventh gear and the twelfth gear can synchronously rotate through the jaw, the eleventh gear is meshed with the duplicate large-end gear, the twelfth gear can move along the eighth spline shaft, and when the twelfth gear is positioned on the left side of the eighth spline shaft, the twelfth gear with be located the epaxial thirteenth gear engagement of ninth integral key, when the twelfth gear is located the eighth integral key shaft right side, duplicate gear simultaneously with eleventh gear and twelfth gear engagement, the twelfth gear and thirteenth gear engagement, the thirteenth gear drives coaxial fourteenth gear rotation through the ninth integral key shaft, fourteenth gear and fifteenth gear engagement, the fifteenth gear is installed on transition axle one end, the transition axle is installed on the rotary tillage body, the sixteenth gear is installed to the transition axle other end, the sixteenth gear drives through a plurality of gear of establishing ties and is located the epaxial seventeenth gear rotation of pear sword, the pear sword axle is installed on the rotary tillage body, thereby drive the rotation of pear sword axle through the seventeenth gear.

Preferably, the transition shaft is sleeved with a right sleeve, the other side of the duplicate gear is provided with a left sleeve, and the left sleeve and the right sleeve are provided with pull lugs.

Preferably, the gearbox comprises a gearbox shell, the gearbox shell is respectively provided with a first spline shaft, a second spline shaft, a third spline shaft, a fourth spline shaft, a fifth spline shaft, a sixth spline shaft and a seventh spline shaft through bearings, the first spline shaft is sleeved with a first gear and a second gear, two ends of the first gear are respectively provided with a first big end gear and a first small end gear, and the second gear can move along the first spline shaft; the second spline shaft is sleeved with a parallel gear, and the two ends of the parallel gear are respectively provided with a parallel large-end gear and a parallel small-end gear; a third gear and a fourth gear are sleeved on the third spline shaft, a third big end gear and a third small end gear are arranged at two ends of the third gear, and a fourth big end gear and a fourth small end gear are arranged at two ends of the fourth gear capable of moving along the third spline shaft; a fifth gear and a sixth gear are sleeved on the fourth spline shaft, a fifth big end gear and a fifth small end gear are arranged at two ends of the fifth gear, and a sixth big end gear and a sixth small end gear are arranged at two ends of the sixth gear capable of moving along the fourth spline shaft; a seventh gear and a pair of eighth gears are sleeved on the fifth spline shaft, and two ends of the seventh gear are connected with the eighth gears through connecting devices; the sixth spline shaft is a gear shaft, and a reduction gear is sleeved on the sixth spline shaft; the seventh spline shaft is a driving shaft, and a driving gear is arranged on the driving shaft; the power input drives the first spline shaft to rotate, the first spline shaft drives the first gear and the second gear to rotate, and the second gear moves along the first spline shaft and can be meshed with the third big-end gear or the big-end gear; when the gear is meshed with the third big-end gear, the sixth gear can move along the fourth spline shaft, the third big-end gear of the third gear is meshed with the sixth small-end gear of the sixth gear, or the third small-end gear of the third gear is meshed with the sixth big-end gear of the sixth gear to drive the coaxial fifth gear to rotate, the fifth gear drives the seventh gear to rotate so as to drive the coaxial eighth gear to rotate, the eighth gear drives the reduction gear to rotate, the sixth spline shaft rotates along with the reduction gear, and the sixth spline shaft drives the driving shaft to rotate through the gear teeth and the driving gear; when the second gear is meshed with the large-end gear, the second gear is meshed with the small-end gear and the third large-end gear of the third gear, so that the driving gear is driven to rotate reversely; when the second gear is not meshed with the third gear and is not meshed with the gear and is positioned in the middle position, the fourth gear slides, the fourth large-end gear is meshed with the first small-end gear, or the fourth small-end gear is meshed with the first large-end gear, so that the third spline shaft is driven to rotate through the first spline shaft, and the rotation of the driving gear is realized.

Preferably, the connecting device is a tooth insert, the tooth inserts are arranged on two sides of the seventh gear, the tooth insert is arranged at one end of the eighth gear, and the eighth gear is driven to rotate through the cooperation of the tooth inserts.

Preferably, the transmission housing is connected to the transmission case by pulling a pair of pull rods.

Preferably, the power input includes a clutch assembly and a clutch shaft, the clutch assembly rotates the clutch shaft through a spline, a ninth gear is attached to an end of the clutch shaft, a tenth gear is attached to an end of the first spline shaft, and the clutch shaft rotates the first spline shaft through the ninth gear and the tenth gear.

Has the advantages that: the rotary cultivator matched with the hand tractor can adjust the rotation of the pear cutter shaft by sliding the twelfth gear, thereby realizing two states of high speed and low speed, being suitable for rotary cultivation of large-area rice, and having high efficiency and good reliability; meanwhile, a new gearbox is designed, and the walking tractor is changed from two-wheel drive to four-wheel drive, so that the walking tractor is more beneficial to working in various paddy fields.

Drawings

Fig. 1 is a schematic front view of the present invention.

Fig. 2 is a schematic view of the internal structure of the rotary cultivator.

Fig. 3 is a schematic front view of the clutch of the present invention.

Fig. 4 is a schematic structural view of fig. 3 along a stepped section of each axis.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

As shown in fig. 1 to 4, the rotary cultivator matched with a walking tractor of the invention comprises a tractor body and a rotary cultivator connected with the tractor body, wherein the tractor body comprises a gearbox, the gearbox is connected with the rotary cultivator through a pair of duplicate gears 111, the rotary cultivator comprises a rotary cultivator body, a transition shaft 110, a pearshar shaft 124 and a pearshar 123, an eighth spline shaft 115 and a ninth spline shaft are arranged on the rotary cultivator body, an eleventh gear 113 and a twelfth gear 114 are arranged on the eighth spline shaft 115, a duplicate large-end gear and a duplicate small-end gear are arranged at two ends of the duplicate gear 111, a tooth insert is arranged on one surface of the eleventh gear 113 opposite to the twelfth gear 114, the eleventh gear 113 and the twelfth gear 114 can synchronously rotate through the tooth insert, the eleventh gear 113 is meshed with the duplicate large-end gear, the twelfth gear 114 can move along the eighth spline shaft 115, when the twelfth gear 114 is located on the left side of the eighth spline shaft 115, the twelfth gear 114 meshes with a thirteenth gear 118 located on the ninth spline shaft, when the twelfth gear 114 is located at the right side of the eighth spline shaft 115, the dual gear 111 is simultaneously meshed with the eleventh gear 113 and the twelfth gear 114, the twelfth gear 114 is meshed with the thirteenth gear 118, the thirteenth gear 118 drives the fourteenth gear 117 through the ninth spline shaft to rotate, the fourteenth gear 117 is meshed with the fifteenth gear 119, the fifteenth gear 119 is installed at one end of the transition shaft 110, the transition shaft 110 is installed on the rotary tillage body, the sixteenth gear 126 is installed at the other end of the transition shaft 110, the sixteenth gear 126 drives the seventeenth gear 129 located on the pear cutter shaft 124 to rotate through a plurality of gears connected in series, and the pear cutter shaft 124 is installed on the rotary tillage body, so that the pear cutter shaft 124 is driven to rotate through the seventeenth gear 129.

In the invention, a right sleeve 125 is sleeved outside the transition shaft 110, a left sleeve 121 is arranged at the other side of the duplicate gear 111, and pull lugs are arranged on the left sleeve 121 and the right sleeve 125.

Specific transmission line and working principle

The connection mode of the rotary cultivator and the walking tractor is the same as the conventional connection mode, and the rotary cultivator and the walking tractor are rigidly connected through screws. Power is taken from a double gear 111 of the gearbox of the hand tractor as shown in detail. The left end tooth of the duplicate gear 111 is meshed with the eleventh gear 113, the eleventh gear 113 is freely sleeved on the eighth spline shaft 5, the right side of the eleventh gear 113 and the left side of the twelfth gear 114 are both provided with tooth inserts, the twelfth gear 114 can slide left and right on the spline of the eighth spline shaft 5, when the twelfth gear 114 slides left, the tooth inserts of the eleventh gear 113 are meshed, the power of the duplicate gear 111 is transmitted to the twelfth gear 114 through the eleventh gear 113, the power of the twelfth gear 114 is transmitted to the thirteenth gear 118, the thirteenth gear 118 and the fourteenth gear 117 are connected with the same spline shaft, the power is transmitted to the fourteenth gear 117, the fourteenth gear 117 and the fifteenth gear 119 are a pair of meshed gears, so the power is transmitted to the fifteenth gear 119, the fifteenth gear 119 is connected with the fifteenth gear 119 at both ends of the transition shaft 110 with splines, therefore, the power is transmitted to the sixteenth gear 126, 3 same gears are shared by the sixteenth gear 126 and the seventeenth gear 129, the sixteenth gear 126 and the seventeenth gear 129 are all installed in the box body of the transmission box body in series, one end of the sixteenth gear 126 is connected with the sixteenth gear 129, the power is transmitted to the seventeenth gear 129 from the sixteenth gear 126, the seventeenth gear 129 is connected with the pear cutter shaft 14 through splines, and the pear cutters 123 are connected on the pear cutter shaft through screws, so that the power is transmitted to the pear cutters 123 from the seventeenth gear 129, the rotary tillage soil crushing and beating operation of the pear cutters 123 is realized. The transmission path is a high-speed transmission path and a low-speed transmission path, specifically, when the sliding twelfth gear 114 slides to the right, the left and right jaw are separated first, then the external teeth of the twelfth gear 114 are engaged with the external teeth at the right end of the duplicate gear 111, and the latter transmission path is the same as the high-speed transmission path, that is, the low-speed transmission path. The rotation speed of the pear cutter can be changed at any time through the shifting block 22 and the shifting fork 21 according to the requirements of users, and the shifting block 132 and the shifting fork 131 are adopted as the known technology in the field.

The gearbox comprises a gearbox shell, wherein the gearbox shell is respectively provided with a first spline shaft 8, a second spline shaft B, a third spline shaft C, a fourth spline shaft D, a fifth spline shaft E, a sixth spline shaft and a seventh spline shaft G through bearings, the first spline shaft 8 is sleeved with a first gear 9 and a second gear 10, two ends of the first gear are respectively provided with a first big end gear and a first small end gear, and the second gear can move along the first spline shaft 8; a gear 11 is sleeved on the second spline shaft B, and a large-end gear and a small-end gear are respectively arranged at two ends of the gear; a third gear 12 and a fourth gear 13 are sleeved on the third spline shaft C, a third big end gear and a third small end gear are arranged at two ends of the third gear, and a fourth big end gear and a fourth small end gear are arranged at two ends of the fourth gear capable of moving along the third spline shaft C; a fifth gear 14 and a sixth gear 15 are sleeved on the fourth spline shaft D, a fifth big end gear and a fifth small end gear are arranged at two ends of the fifth gear, and a sixth big end gear and a sixth small end gear are arranged at two ends of the sixth gear capable of moving along the fourth spline shaft D; a seventh gear 16 and a pair of eighth gears 17 are sleeved on the fifth spline shaft E, and two ends of the seventh gear are connected with the eighth gears through connecting devices; the sixth spline shaft is a gear shaft, and a reduction gear 18 is sleeved on the sixth spline shaft; the seventh spline shaft G is a driving shaft 21, a driving gear 20 is installed on the driving shaft 21, the driving gear 20 is meshed with the duplicate gear, and the duplicate gear is driven to rotate through the driving gear 20. The power input drives the first spline shaft 8 to rotate, the first spline shaft 8 drives the first gear and the second gear to rotate, and the second gear moves along the first spline shaft 8 and can be meshed with the third big-end gear or the big-end gear of the gear 11. When the gear is meshed with the third big-end gear, the sixth gear can move along the fourth spline shaft D, the big-end gear of the third gear is meshed with the small-end gear of the sixth gear, or the small-end gear of the third gear is meshed with the big-end gear of the sixth gear to drive the coaxial fifth gear to rotate, the fifth gear drives the seventh gear to rotate, so as to drive the coaxial eighth gear to rotate, the eighth gear drives the reduction gear 18 to rotate, the sixth spline shaft rotates along with the reduction gear 18, and the sixth spline shaft drives the driving shaft 21 to rotate through the gear teeth and the driving gear 20; when the second gear is meshed with the large-end gear of the gear 11, the small-end gear of the gear 11 is meshed with the third large-end gear of the third gear, so that the driving gear 20 is driven to rotate reversely; when the second gear is not engaged with the third gear and is not engaged with the gear 11 at the intermediate position, the fourth gear is slid, the fourth large end gear is engaged with the first small end gear, or the fourth small end gear is engaged with the first large end gear, so that the third spline shaft C is driven to rotate by the first spline shaft 8, and the rotation of the driving gear 20 is realized.

In the present invention, there is a core feature for the left and right final gearboxes. Firstly, the transmission ratio is increased, a pair of gears not only ensures the strength of transmitted power, but also ensures the purposes of light overall mechanical weight and convenient operation, and the final transmission box is designed initially, and the main parameters of the pair of gears are as follows: the driving gear shaft m is 4 plus or minus 0.5, the driving gear shaft z is 10 plus or minus 1, the driving gear shaft m is 4 plus or minus 0.5, and the driving gear shaft z is 49 plus or minus 2, so that the speed and strength requirements of the walking tractor are ensured, and the labor-saving and reliable steering is also ensured; secondly, the left and right final gearboxes 4 are connected with the driving shaft 21 by 23 and 24 pull rods, so that the rigidity and the strength of the gearbox assembly are improved.

In the invention, the connecting device is a jaw, the jaws are arranged on both sides of the seventh gear, the jaw is arranged at one end of the eighth gear, and the eighth gear is driven to rotate by the cooperation of the jaws. The gearbox housing is connected to the gearbox by pulling a pair of pull rods 23. The power input comprises a clutch assembly 1 and a clutch shaft 5, the clutch assembly 1 drives the clutch shaft 5 to rotate through a spline, a ninth gear 6 is installed at the end part of the clutch shaft 5, a tenth gear 7 is installed at the end part of the first spline shaft 8, and the clutch shaft 5 drives the first spline shaft 8 to rotate through the ninth gear 6 and the tenth gear 7.

The specific common working principle and the power transmission route are as follows:

power is input into the clutch assembly 1 through a triangular shape by a diesel engine, the clutch shaft 5 obtains power through a spline, the power is transmitted to the engagement of the ninth gear 6 and the tenth gear 7 through the spline, the power is transmitted to the tenth gear 7, the power is transmitted to the first gear 9 and the second gear 10 through the spline shaft 8, the power of the gear 9 is divided into two paths for transmission, one path is transmitted to the rotary cultivator to serve as a power source of the rotary cultivator, and the other path is transmitted to the front walking wheel shaft. Specifically, the big end of the second gear 10 is meshed with the big end of the third gear 12 (called 1 gear or 4 gear), the big end of the third gear 12 is meshed with the small end of the sixth gear 15 (called 4 gear), the sixth gear 15 is slid to enable the small end of the third gear 12 to be meshed with the big end of the sixth gear 15 (called 1 gear), the fifth gear 14 and the sixth gear 15 are arranged on the same spline shaft, the fifth gear 14 obtains power, the fifth gear 14 is meshed with the seventh gear 16, the seventh gear 16 obtains power, the left end and the right end of the seventh gear 16 are respectively provided with a jaw, 2 eighth gears 17 are respectively sleeved on a steering shaft in an empty mode, the eighth gears 17 are meshed with the seventh gears 16 through the jaw, the eighth gears 17 obtain power, the eighth gears 17 are divided into the left side and the right side, are respectively meshed with 1 left and right reduction gears 18, the reduction gears 19 are spline shafts, and are respectively connected with the left and right gears 18 through splines. The drive gears 20 are also 1 on the left and right, and are constantly engaged with the gear shaft 19, and the drive shafts 21 are also one on the left and right, and are connected to the drive gears 20 by splines. Therefore, power is transmitted to the left and right driving shafts from the left and right of the eighth gear 17, the driving shafts rotate with power, and the driving shafts rotate to work, and the process is called as a transmission route of 1-gear walking power and 4-gear walking power.

When the second gear 10 slides to the left, the third gear 12 is disengaged and is engaged with the big end of the gear 11, the transmission form of the rear is the same, and the transmission route of the walking power of the reverse 1 gear and the reverse 2 gear is realized. When the second gear 10 is not meshed with the third gear 12 and is not meshed with the gear 11 (realized by a shifting fork, a shifting fork shaft, a positioning spring and a positioning steel ball) and is in a middle position, the fourth gear 13 slides, when the fourth gear 13 slides rightwards, a big tooth at the right end of the fourth gear 13 is meshed with a small tooth at the right end of the gear 9, and the transmission forms of the rear gears are the same, so that the walking power transmission routes of 2 gears and 5 gears are realized. When the sliding fourth gear 13 slides to the left, the left end small tooth of the fourth gear 13 is meshed with the left end large tooth of the first gear 9, and the transmission forms of the rear gears are the same, so that the walking power transmission routes of 3 gears and 6 gears are realized. When the tractor uses 1 st and 4 th gears and reverse 1 st and 2 nd gears, the fourth gear 13 is in the middle position (also realized by a shifting fork, a shifting fork shaft, a positioning spring and a positioning steel ball).

The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.

Claims

1. A rotary cultivator matched with a walking tractor is characterized in that: the tractor comprises a tractor body and a rotary cultivator connected with the tractor body, wherein the tractor body comprises a gearbox, the gearbox is connected with the rotary cultivator through a pair of duplicate gears, the rotary cultivator comprises a rotary tillage body, a transition shaft, a pear cutter shaft and a pear cutter, an eighth spline shaft and a ninth spline shaft are arranged on the rotary tillage body, an eleventh gear and a twelfth gear are arranged on the eighth spline shaft, a duplicate big end gear and a duplicate small end gear are arranged at two ends of the duplicate gear, a tooth insert is arranged on one surface of the eleventh gear, which is opposite to the twelfth gear, the eleventh gear and the twelfth gear can synchronously rotate through the tooth insert, the eleventh gear is meshed with the duplicate big end gear, the twelfth gear can move along the eighth spline shaft, when the twelfth gear is positioned on the left side of the eighth spline shaft, the twelfth gear is meshed with a thirteenth gear positioned on the ninth spline shaft, when the twelfth gear is positioned on the right side of the eighth spline shaft, duplicate gear simultaneously with eleventh gear and twelfth gear engagement, twelfth gear and thirteenth gear engagement, the thirteenth gear passes through the ninth integral key shaft and drives coaxial fourteenth gear revolve, fourteenth gear and fifteenth gear engagement, the fifteenth gear is installed on transition axle one end, the transition axle is installed on the rotary tillage body, the sixteenth gear is installed to the transition axle other end, the sixteenth gear drives the seventeenth gear rotation that is located the epaxial pear sword through a plurality of gear of establishing ties, the pear sword axle is installed on the rotary tillage body, thereby it rotates to drive the pear sword axle through the seventeenth gear.

2. The rotary cultivator matched with the walking tractor as claimed in claim 1, wherein: the transition shaft is sleeved with a right sleeve, the other side of the duplex gear is provided with a left sleeve, and the left sleeve and the right sleeve are provided with pull lugs.

3. The rotary cultivator matched with the walking tractor as claimed in claim 1, wherein: the gearbox comprises a gearbox shell, wherein the gearbox shell is respectively provided with a first spline shaft, a second spline shaft, a third spline shaft, a fourth spline shaft, a fifth spline shaft, a sixth spline shaft and a seventh spline shaft through bearings, the first spline shaft is sleeved with a first gear and a second gear, two ends of the first gear are respectively provided with a first big end gear and a first small end gear, and the second gear can move along the first spline shaft; the second spline shaft is sleeved with a parallel gear, and the two ends of the parallel gear are respectively provided with a parallel large-end gear and a parallel small-end gear; a third gear and a fourth gear are sleeved on the third spline shaft, a third big end gear and a third small end gear are arranged at two ends of the third gear, and a fourth big end gear and a fourth small end gear are arranged at two ends of the fourth gear capable of moving along the third spline shaft; a fifth gear and a sixth gear are sleeved on the fourth spline shaft, a fifth big end gear and a fifth small end gear are arranged at two ends of the fifth gear, and a sixth big end gear and a sixth small end gear are arranged at two ends of the sixth gear capable of moving along the fourth spline shaft; a seventh gear and a pair of eighth gears are sleeved on the fifth spline shaft, and two ends of the seventh gear are connected with the eighth gears through connecting devices; the sixth spline shaft is a gear shaft, and a reduction gear is sleeved on the sixth spline shaft; the seventh spline shaft is a driving shaft, and a driving gear is arranged on the driving shaft; the power input drives the first spline shaft to rotate, the first spline shaft drives the first gear and the second gear to rotate, and the second gear moves along the first spline shaft and can be meshed with the third big-end gear or the big-end gear; when the gear is meshed with the third big-end gear, the sixth gear can move along the fourth spline shaft, the third big-end gear of the third gear is meshed with the sixth small-end gear of the sixth gear, or the third small-end gear of the third gear is meshed with the sixth big-end gear of the sixth gear to drive the coaxial fifth gear to rotate, the fifth gear drives the seventh gear to rotate so as to drive the coaxial eighth gear to rotate, the eighth gear drives the reduction gear to rotate, the sixth spline shaft rotates along with the reduction gear, and the sixth spline shaft drives the driving shaft to rotate through the gear teeth and the driving gear; when the second gear is meshed with the large-end gear, the second gear is meshed with the small-end gear and the third large-end gear of the third gear, so that the driving gear is driven to rotate reversely; when the second gear is not meshed with the third gear and is not meshed with the gear and is positioned in the middle position, the fourth gear slides, the fourth large-end gear is meshed with the first small-end gear, or the fourth small-end gear is meshed with the first large-end gear, so that the third spline shaft is driven to rotate through the first spline shaft, and the rotation of the driving gear is realized.

4. The rotary cultivator matched with the walking tractor as claimed in claim 3, wherein: the connecting device is a tooth insert, the tooth inserts are arranged on two sides of the seventh gear, the tooth insert is arranged at one end of the eighth gear, and the eighth gear is driven to rotate through the cooperation of the tooth inserts.

5. The rotary cultivator matched with the walking tractor as claimed in claim 1, wherein: the gearbox housing is connected with the gearbox by pulling a pair of pull rods.

6. The rotary cultivator matched with the walking tractor as claimed in claim 1, wherein: the power input comprises a clutch assembly and a clutch shaft, the clutch assembly drives the clutch shaft to rotate through a spline, a ninth gear is installed at the end of the clutch shaft, a tenth gear is installed at the end of the first spline shaft, and the clutch shaft drives the first spline shaft to rotate through the ninth gear and the tenth gear.