CN114145086A

CN114145086A - Four-wheel drive micro-tillage machine

Info

Publication number: CN114145086A
Application number: CN202111442151.9A
Authority: CN
Inventors: 鲜鹏; 刘大明; 李想; 李鑫; 熊卓宇
Original assignee: Chongqing Huashidan Agricultural Equipment Manufacturing Co ltd
Current assignee: Chongqing Huashidan Agricultural Equipment Manufacturing Co ltd
Priority date: 2021-11-30
Filing date: 2021-11-30
Publication date: 2022-03-08
Anticipated expiration: 2041-11-30
Also published as: CN114145086B

Abstract

The invention relates to the technical field of agricultural machinery, and particularly discloses a four-wheel-drive mini-tiller which comprises a rack, a driver, a transmission, a travelling wheel and a cutter, wherein the driver is used for providing power for the transmission, the driver and the transmission are fixed on the rack, the transmission comprises a box body, a main shaft, a travelling output shaft and a cutter output shaft, the main shaft, the travelling output shaft and the cutter output shaft are rotatably connected to the box body, the travelling output shaft drives the travelling wheel to rotate, the cutter output shaft drives the cutter to rotate, a shifting gear is axially and slidably connected to the main shaft, a transition gear set is rotatably connected to the box body, the transition gear set comprises a first transition gear and a second transition gear which are fixedly connected to the box body, the cutter output shaft is fixedly connected with a fixed gear, the fixed gear is normally meshed with the first transition gear, and the shifting gear can be meshed with the fixed gear or the second transition gear. The scheme is used for solving the problems that the mini-tiller in the prior art only has the rotating speed in one direction, so that the mini-tiller is multiple in types, high in equipment cost and low in production efficiency when different agricultural operations are carried out on the same day.

Description

Four-wheel drive micro-tillage machine

Technical Field

The invention relates to the technical field of agricultural machinery, in particular to a four-wheel-drive mini-tiller.

Background

In current agricultural machinery, the mini-tiller is often adopted to carry out ditching, ridging, rotary tillage and other work on the land, the requirements on the rotary direction and the speed of a cutter are different due to different modes, for example, the rotary direction of the cutter is different during ditching and rotary tillage, and the required cutter rotating speed is different during ditching and rotary tillage, so that the mini-tiller is further subdivided into the mini-tiller for ditching and ridging and the mini-tiller for rotary tillage in the existing agricultural operation, the equipment cost for carrying out agricultural operation is increased undoubtedly, and when the rotary tillage is required to be carried out and the ditching and ridging are required after the rotary tillage in the same day, an operator has to spend time and manpower to transfer two devices between a storage place and an operation place, the use cost of the equipment is improved, and the labor production efficiency is reduced.

Among the present machine of ploughing a little, for improve equipment's suitability, make equipment adaptation different operation requirements, the derailleur of ploughing a little mostly all possesses the gear adjustment of walking wheel and the gear adjustment function of cutter, but also because of the existence of these gear adjustments, make the transmission structure of whole derailleur complicated, axle type part and gear type part are all many, it is big to cause transmission structure to occupy the size, the box size of derailleur also consequently grow, be unfavorable for the miniaturization and the lightweight of the machine of ploughing a little that has this derailleur.

In addition, among the current machine of ploughing a little, the box includes the derailleur box and walks the case box down, the derailleur box is used for holding the transmission structure of clutch and derailleur, and it is equipped with vertical transmission shaft and horizontally walking axle to walk the incasement down, the walking axle is used for driving the walking wheel and rotates, the transmission shaft is used for transmitting the power transmission of derailleur transmission structure to the walking axle, because of the existence of walking the case down, make whole height of ploughing a little great, to the shorter crops in branch and leaf distance ground, because of the limited agricultural operation that can't carry out mechanical automation of space height between crops leaf and the ground (also called crops below).

Disclosure of Invention

The invention aims to provide a four-wheel-drive mini-tiller, and solves the problems that in the prior art, the mini-tiller only has rotating speed in one direction, so that the mini-tiller is multiple in types, high in equipment cost and low in production efficiency when different agricultural operations are carried out on the same day.

In order to achieve the above object, the basic scheme of the invention is as follows:

four-wheel-driven mini-tiller, which comprises a frame, a driver, the derailleur, walking wheel and cutter, the driver is used for providing power for the derailleur, driver and derailleur are all fixed in the frame, the derailleur includes the box and rotates the main shaft of connection on the box, walking output shaft and cutter output shaft, the walking output shaft drives the walking wheel and rotates, the cutter output shaft drives the cutter rotation, axial sliding connection has the gear of shifting on the main shaft, it is connected with the transition gear set to rotate on the box, the transition gear set includes fixed connection's transition gear one and transition gear two, fixedly connected with fixed gear on the cutter output shaft, fixed gear and transition gear one constant mesh, the gear of shifting can mesh with fixed gear or transition gear two.

Compare the beneficial effect in prior art:

when the scheme is adopted, the gear shifting gear and the transition gear set are arranged between the transmission of the cutter output shaft and the main shaft, so that the cutter output shaft has three states, wherein one state is that the gear shifting gear is not meshed with any gear, and the state of the cutter output shaft is idle; after the gear shifting gear is meshed with the fixed gear, the power of the main shaft is directly transmitted to the cutter output shaft, so that the cutter output shaft drives the cutter to output one power; and after gear and the meshing of transition gear two, power transmits for the transition gear train through gear of shifting, transmit power for the cutter output shaft by transition gear one in the transition gear train again, and then make the direction of rotation of the cutter that the cutter output shaft drove change, the intervention through the transition gear train simultaneously, also make the rotational speed of the cutter that the cutter output shaft drove also change, and then satisfy the agricultural operation that realizes different requirements on same machine of ploughing a little, and then realized the functional diversity of ploughing a little machine, equipment cost is reduced, the condition that needs that exist when also having avoided carrying out rotary tillage and ditching earthing up on the same day simultaneously shift two equipment, and then be favorable to improving work efficiency.

In addition, in this scheme, through the setting of transition gear train for the rotational speed of cutter under different states has also taken place to change, further satisfies the in-service use demand, needs higher rotational speed when earthing up like the ditching, and then needs lower rotational speed during the rotary tillage and the cutter when requiring rotary tillage and ditching is revolved to changing.

Further, power transmission is realized between the main shaft and the walking output shaft through a transmission gear set, the transmission gear set comprises a main gear and a transmission set, the main gear is fixedly connected to the main shaft, the transmission set is used for transmitting power of the main gear on the main shaft to an auxiliary gear, the transmission set comprises a transmission gear and an auxiliary gear, the transmission gear is sleeved on the cutter output shaft in a hollow mode, the auxiliary gear is connected to the walking output shaft, the transmission gear can be meshed with the auxiliary gear, and the transmission gear can be meshed with the main gear.

Has the advantages that: when this scheme of adoption, through transmission gear and pinion of transmission group for power can transmit through transmission gear, and when this scheme was simultaneously, transmission gear empty sleeve carried out rational utilization with the cutter output shaft on the cutter output shaft, compared and established the condition of axis of rotation in addition, this scheme can make the structure in the derailleur compacter, and then reduced the overall dimension of derailleur, and then be favorable to declining the miniaturization and the lightweight of ploughing the derailleur of machine.

Besides, the scheme can realize at least two-stage speed reduction through the arrangement of the main gear, the transmission gear and the auxiliary gear, ensures that the walking output shaft outputs power after speed reduction, and is favorable for improving the practicability.

Further, the transmission gear comprises a first transmission gear and a second transmission gear which are sleeved on the cutter output shaft in an empty mode, the pinion comprises a first pinion and a second pinion, the first pinion is sleeved on the walking output shaft in an empty mode, the second pinion rotates synchronously with the walking output shaft, the first transmission gear, the second transmission gear and the first pinion respectively comprise a large gear and a small gear which are fixedly connected, the large gear of the first transmission gear is meshed with the main gear, the small gear of the first transmission gear is meshed with the large gear of the first pinion, the small gear of the first pinion is meshed with the large gear of the second transmission gear, and the small gear of the second transmission gear can be meshed with the second pinion.

Has the advantages that: when this scheme of adoption, the meshing of pinion and gear wheel all once slows down each time, and in this scheme, through the setting of main shaft, cutter output shaft and walking output shaft for the master gear, transmission gear one, transmission gear two, pinion one and pinion two between form the level four and slowed down, and then greatly reduced the output rotational speed of the walking output shaft of derailleur, and then make the walking speed of ploughing the machine a little more be fit for actual agricultural operation.

Furthermore, the bull gear of the first transmission gear and the bull gear of the second transmission gear are located in the middle of the first transmission gear, the pinion of the first transmission gear and the pinion of the second transmission gear are located on two sides of the first transmission gear, and a yielding space is formed between the bull gear of the first auxiliary gear and the pinion and used for avoiding the bull gear of the first transmission gear.

Has the advantages that: when this scheme of adoption, the gear wheel of transmission gear is located the centre and the pinion is located both sides, utilizes the space of stepping down to step down for the gear wheel of one of them transmission gear, and then makes the spatial layout of derailleur compacter, further is favorable to the miniaturization of derailleur, promotes the lightweight of the derailleur of ploughing the machine a little, and then promotes the lightweight and the miniaturization of ploughing the machine a little.

Further, the second auxiliary gear is axially and slidably connected to the walking output shaft and further comprises a reverse gear rotatably connected to the box body, the second transmission gear is further provided with a matched gear meshed with the reverse gear, and the second auxiliary gear can be further meshed with the reverse gear.

Has the advantages that: when the scheme is adopted, the second pinion is slid through the arrangement of the second reverse gear and the axially moving second pinion, so that the second pinion is meshed with the second reverse gear when the steering of the walking output shaft needs to be changed, and then power is transmitted to the second pinion which rotates synchronously with the walking output shaft from the main shaft sequentially through the main gear, the first transmission gear, the first pinion, the second transmission gear and the second reverse gear, so that the direction change of the walking output shaft is realized, and the direction change can be called as reverse gear; when the travelling wheel needs to advance forwards, the secondary gear II slides axially firstly, so that the secondary gear II is not meshed with any gear, the secondary gear II and the travelling output shaft form a neutral position, then the secondary gear II is continuously pushed to slide axially, so that the secondary gear II is meshed with a pinion of the transmission gear II, the forward rotation of the secondary gear II and the travelling output shaft is realized, and the advancing of the travelling wheel is also realized; this scheme makes the walking wheel possess different gears, improves the practicality of ploughing the machine a little.

Further, the reverse gear and the transition gear are located on both sides of the transmission gear.

Has the advantages that: when this scheme of adoption, including transmission gear one and transmission gear two because of the transmission gear, transmission gear one all includes gear wheel and pinion with transmission gear two, puts big gear in the centre and pinion puts on both sides for the cutter output shaft is kept away from the both ends position of two gear wheels and is gone up the space great, and then reverses gear and transition gear's setting with the great position in this both ends space, has further improved the compactness of part overall arrangement in the derailleur, is favorable to the miniaturization of derailleur.

Furthermore, a speed changing cavity and a walking cavity are arranged in the box body, the main shaft, the walking output shaft and the cutter output shaft are all positioned in the speed changing cavity, the wall of the walking cavity is rotatably connected with a walking shaft, and the walking shaft is fixedly connected with a walking wheel; a transmission gear is arranged between the walking shaft and the walking output shaft and is positioned in the walking cavity.

Has the advantages that: when the scheme is adopted, the main shaft, the walking output shaft and the cutter output shaft are all positioned in the speed changing cavity, the installation of the speed changing structure of the speed changer is completed, the walking shaft fixedly connected with the walking wheel directly rotates on the cavity wall of the walking cavity, and meanwhile, through the design of the box body and the connection design of the walking shaft and the transmission gear of the walking output shaft, the installation of the transmission structure of the speed changer and the installation of the walking shaft are completed on one box body; on the other hand, also because the cancellation of lower walking case for whole machine of ploughing a little highly can greatly reduce, and then make things convenient for the quick-witted direct mechanical automation operation that carries out in the crops below space that branch leaf is short apart from ground of ploughing a little of this scheme, solved the difficult problem among the prior art, be favorable to improving agricultural operating efficiency.

Furthermore, the box body is internally provided with a clutch cavity, the walking cavity and the clutch cavity are positioned at the same side of the speed changing cavity, a clutch is connected between the driver and the main shaft, and the clutch is positioned in the clutch cavity.

Has the advantages that: when this scheme of adoption, through setting up separation and reunion chamber and walking chamber at the variable speed chamber homonymy to make the separation and reunion chamber below space that is used for installing the clutch in the box can utilize, make the structure arrangement ground of derailleur compacter, be favorable to improving the miniaturization and the lightweight of derailleur.

Further, the clutch cavity is communicated with the walking cavity.

Has the advantages that: when the scheme is adopted, on one hand, the clutch cavity and the walking cavity are communicated, so that a transmission gear for power transmission between the walking shaft and the walking output shaft can have a wider installation space; on the other hand, the chambers in the box body are mutually communicated in pairs, so that lubricating oil is injected into only one chamber, and the oil passing holes are formed in the connecting plates between the adjacent chambers, so that the lubricating oil can automatically flow into other chambers, and the lubricating of different chambers in the box body is facilitated.

Further, the cutter includes arbor and blade, and the arbor rotates to be connected in the frame, and the cutter output shaft drives the arbor and rotates, and blade fixed connection is on the arbor, and the blade includes handle of a knife and crooked blade, and the blade is crooked for handle of a knife place plane, is equipped with the cutting edge on the blade, and the cutting edge twists reverse to crooked blade inboard.

Has the advantages that: when this scheme of adoption, with the blade for the crooked back in handle of a knife place plane, twist reverse the cutting edge to crooked blade inboard again for the cutting edge has space curve in the space, also makes the blade line formation space curve of cutting edge, with the atress characteristic when adapting to the blade and cutting soil, thereby the soil resistance that bears when reducing the blade and cutting soil reduces the loss of blade, is favorable to improving rotary blade's life. In addition, the cutting edge is twisted towards the inner side of the bent blade body, in the soil cutting process of the blade, after the cutting edge is firstly cut into the soil, the non-cutting edge part of the blade body can form extrusion force on the uncut soil in the advancing direction of the micro-tillage machine when the cutting edge is cut into the soil, so that the pre-loosening of the uncut soil is realized, the subsequent soil cutting operation of the micro-tillage blade is more labor-saving, and the soil cutting power consumption is further reduced.

Drawings

FIG. 1 is a front view of an embodiment of the present invention;

FIG. 2 is a schematic three-dimensional structure of a transmission and a cutter coupled according to an embodiment of the present invention;

FIG. 3 is a top view of FIG. 2;

FIG. 4 is a front cross-sectional view of FIG. 2;

FIG. 5 is a schematic three-dimensional view of the transmission structure of the transmission with the housing removed in an embodiment of the present invention;

FIG. 6 is a schematic three-dimensional view of a transmission structure of a transmission at another angle with a housing removed according to an embodiment of the present invention;

FIG. 7 is a front view of FIG. 5;

FIG. 8 is a schematic view taken along line A of FIG. 7;

FIG. 9 is a schematic view of the structure of a blade in a tool according to an embodiment of the invention from one of its views;

fig. 10 is a schematic view of a blade of a tool according to an embodiment of the invention from another perspective.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the tool comprises a rack 100, a transmission 200, a driver 300, a traveling wheel 400, a tool 500, a clutch 600, a main shaft 1, a gear shifting gear 11, a main gear 12, a traveling output shaft 2, a first pinion 21, a second pinion 22, a tool output shaft 3, a fixed gear 31, a first transmission gear 32, a second transmission gear 33, a matching gear 34, an intermediate shaft 4, a first transition gear 41, a second transition gear 42, a reverse gear shaft 5, a reverse gear 51, a traveling shaft 6, a first bevel gear set 61, a box body 10, a clutch cavity 20, a speed change cavity 30, a traveling cavity 60, a transmission shaft 700, a cutter shaft 7, a blade 8, a cutter handle 81, a cutter body 82 and a blade 821.

Examples

The embodiment is substantially as shown in fig. 1 to 10, and with reference to fig. 1 to 4, a four-wheel drive mini-tiller comprises a frame 100, a driver 300, a transmission 200, a road wheel 400 and a cutter 500, wherein the driver 300 and the transmission 200 are fixedly mounted on the frame 100, the driver 300 is used for providing power for the transmission 200, and in this embodiment, the driver 300 may be an engine.

With reference to fig. 5 to 8, the transmission 200 includes a case 10, a main shaft 1 rotatably connected to the case 10, a traveling output shaft 2, a tool output shaft 3, an intermediate shaft 4, and a reverse shaft 5, wherein a clutch 600 is connected between the driver 300 and the main shaft 1, the traveling output shaft 2 drives the traveling wheel 400 to rotate, and the tool output shaft 3 drives the tool 500 to rotate; two clutch cavities 20, a speed change cavity 30 and a walking cavity 60 which are mutually communicated are integrally formed in the box body 10, the clutch cavities 20 and the walking cavity 60 are located on the same side of the speed change cavity 30, the clutch cavities 20 are used for containing a clutch 600, and the speed change cavity 30 is used for containing a main shaft 1, a walking output shaft 2, a cutter output shaft 3, an intermediate shaft 4 and a reverse gear shaft 5.

Specifically, a shifting gear 11 is axially and slidably connected to the main shaft 1, a fixed gear 31 is fixedly connected to the cutter output shaft 3, a transition gear set is sleeved on the intermediate shaft 4, the transition gear set comprises a first transition gear 41 and a second transition gear 42 which are integrally formed, the fixed gear 31 is normally meshed with the first transition gear 41, and the shifting gear 11 can be meshed with the fixed gear 31 or the second transition gear 42.

The power transmission is realized between the main shaft 1 and the walking output shaft 2 through a transmission gear set, the transmission gear set comprises a main gear 12 and a transmission set, the main gear 12 is fixedly connected on the main shaft 1, the transmission set is used for transmitting the power of the main gear 12 on the main shaft 1 to a pinion, the transmission set comprises a transmission gear which is sleeved on the cutter output shaft 3 in a hollow way and a pinion which is connected on the walking output shaft 2, the transmission gear comprises a first transmission gear 32 and a second transmission gear 33 which are sleeved on the cutter output shaft 3 in a hollow way, the pinion comprises a first pinion 21 and a second pinion 22, the first pinion 21 is sleeved on the walking output shaft 2 in a hollow way, the second pinion 22 is axially and slidably connected on the walking output shaft 2, the first transmission gear 32, the second transmission gear 33 and the first pinion 21 respectively comprise a large gear and a small gear which are integrally formed, and the large gear of the first transmission gear 32 is meshed with the main gear 12, the pinion of the first transmission gear 32 is meshed with the bull gear of the first pinion 21, the pinion of the first pinion 21 is meshed with the bull gear of the second transmission gear 33, and the pinion of the second transmission gear 33 can be meshed with the second pinion 22.

The large gear of the first transmission gear 32 and the large gear of the second transmission gear 33 are located in the middle of the transmission gear, the small gear of the first transmission gear 32 and the small gear of the second transmission gear 33 are located on two sides of the transmission gear, and an abdicating space is formed between the large gear and the small gear of the first auxiliary gear 21 and used for avoiding the large gear of the first transmission gear 32.

The reverse gear shaft 5 is sleeved with a reverse gear 51, the second transmission gear 33 is also provided with a matching gear 34 meshed with the reverse gear 51, the matching gear 34 and a large gear and a small gear on the second transmission gear 33 are integrally formed, and the second auxiliary gear 22 can also be meshed with the reverse gear 51.

The reverse gear 51 and the transition gear are located on both sides of the transfer gear.

The wall of the walking cavity 60 is rotatably connected with a walking shaft 6, a transmission gear is arranged between the walking shaft 6 and the walking output shaft 2, the transmission gear adopts a first bevel gear set 61, the first bevel gear set 61 is positioned below the main shaft 1, the first bevel gear set 61 is positioned in the walking cavity 60, and the walking shaft 6 and one bevel gear in the first bevel gear set 61 rotate synchronously.

The axial movement of the shift gear 11 and the second counter gear 22 can be performed by pushing a fork mounted on the housing 10.

With reference to fig. 2, 3, 9 and 10, the cutter 500 includes a cutter shaft 7 and a blade 8, the cutter shaft 7 is rotatably connected to the frame 100, a transmission shaft 700 is connected between the cutter output shaft 3 and the cutter shaft 7, an input end of the transmission shaft 700 is fixedly connected to an output end of the cutter output shaft 3 (specifically, the transmission shaft 700 and the cutter output shaft 3 are fixedly connected by a coaxial device), an output end of the transmission shaft 700 is in transmission connection with the cutter shaft 7 by a second bevel gear set, the blade 8 is fixedly connected to the cutter shaft 7, the blade 8 includes an integrally formed cutter handle 81 and a curved blade 82, the blade 82 is curved with respect to a plane where the cutter handle 81 is located, a cutting edge 821 is integrally formed on the blade 82, the cutting edge 821 is twisted towards an inner side of the curved blade 82, the blade 8 of the present embodiment is designed, the cutter 500 is more labor-saving in the soil cutting process, and the service life of the cutter 500 is prolonged.

The specific implementation process is as follows:

when the tool output shaft control device is adopted, the first transmission gear 32 and the second transmission gear 33 of the transmission gear set are sleeved on the tool output shaft 3 in a hollow mode, so that the rotating speeds between the tool output shaft 3 and the walking output shaft 2 are not affected mutually, and the tool 500 driven by the tool output shaft 3 and the walking wheel 400 driven by the walking output shaft 2 are controlled separately and independently.

This derailleur 200 can realize the high-grade of cutter 500, low gear and neutral, also can realize the forward gear of walking wheel 400, reverse gear and neutral, and specific different gears are as follows:

high-grade of the cutter 500: the shifting gear 11 is directly meshed with the fixed gear 31 fixedly connected to the cutter output shaft 3 through the shifting fork, the power of the main shaft 1 is directly transmitted to the cutter output shaft 3 through the shifting gear 11 and the fixed gear 31, the cutter output shaft 3 transmits the power to the cutter shaft 7 of the cutter 500 through the transmission shaft 700, and then the blade 8 fixed to the cutter shaft 7 rotates.

Neutral position of the cutter 500: through the promotion of shift fork for gear shift gear 11 does not with any gear engagement, then does not have power transmission on the cutter output shaft 3, realizes cutter output shaft 3's neutral to when ploughing the machine a little and shifting, only need walking wheel 400 to start, and then avoid forming the condition of threat to operating personnel safety because of cutter output shaft 3 drives cutter 500 and rotates.

Low gear of the tool 500: the shifting gear 11 is continuously pushed through the shifting fork, so that the shifting gear 11 moves to be meshed with the second transition gear 42, the power of the main shaft 1 is transmitted to the second transition gear 42 through the shifting gear 11, the power is transmitted to the fixed gear 31 through the first transition gear 41, the cutter output shaft 3 rotates when the fixed gear 31 rotates, and the cutter 500 rotates.

Can know by cutter 500's output result, the agricultural operation that different requirements can be realized to this embodiment on same machine of ploughing a little, and then realized ploughing a little the functional diversity of machine, reduced equipment cost, also avoided the condition that needs that exist when carrying out the rotary tillage and ditching earthing up the same day shift two equipment simultaneously, and then be favorable to improving work efficiency. In addition, in this embodiment, through the setting of transition gear train for cutter 500 has also taken place the change in the rotational speed under different states, further satisfies the in-service use demand, if the higher rotational speed is required during ditching hilling, then need lower rotational speed and require the rotary tillage to change with the cutter 500 rotation direction when ditching during the rotary tillage.

Forward gear of road wheel 400: the second pinion 22 is pushed to move through the shifting fork, so that the second pinion 22 is meshed with the pinion of the second transmission gear 33, power on the main shaft 1 is sequentially transmitted to the second pinion 22 through the main gear 12, the first transmission gear 32, the first pinion 21 and the second transmission gear 33, each time of power transmission is one-time speed reduction in the process, four-stage speed reduction is performed in the process that the main shaft 1 transmits the power to the traveling output shaft 2, the output speed of the traveling output shaft 2 is greatly reduced, the traveling output shaft 2 transmits the power to the traveling shaft 6, the rotating speed of the traveling shaft 6 with the traveling wheel 400 is reduced, and the traveling speed of the traveling wheel 400 of the mini-tiller is more suitable for actual agricultural operation.

Neutral of road wheels 400: when the walking wheel 400 is required to be in the neutral position, no power is provided for the walking output shaft 2, and the second pinion 22 is pushed by the shifting fork to move to a position where the second pinion is not meshed with any gear.

Reverse gear of the road wheel 400: the second pinion 22 is pushed by a shifting fork to move to be meshed with the reverse gear 51, and then power is transmitted to the second pinion 22 which rotates synchronously with the walking output shaft 2 from the main shaft 1 sequentially through the main gear 12, the first transmission gear 32, the first pinion 21, the second transmission gear 33 and the reverse gear 51, so that the direction of the walking output shaft 2 is changed, after the direction of the walking output shaft 2 is changed, the direction of the walking shaft 6 is also changed along with the direction of the walking shaft 6 driven by the first bevel gear set 61, the walking wheel 400 arranged on the walking shaft 6 is reversed, and the reverse gear of the walking wheel 400 is also realized.

In this embodiment, the gear wheel of the transmission gear is located in the middle and the pinion is located on both sides, so that the space is larger at the two ends of the cutter output shaft 3 far away from the two gear wheels, and then the position with the larger space at the two ends is provided with the reverse gear 51 and the transition gear, in addition, the abdicating space formed between the gear wheel of the first pinion 21 and the pinion can abdicating the gear wheel of one of the transmission gears, so that the spatial layout of the transmission structure of the whole transmission 200 is more compact, which is beneficial to the miniaturization of the transmission 200, and the light weight of the mini-tiller is promoted.

In addition, when adopting this embodiment, through utilizing main shaft 1 below space, make walking axle 6 that the level set up can be directly with the coaxial rotation of a bevel gear in the first bevel gear group 61, and then make walking axle 6 can all place in a case shell with other axles of ploughing the machine a little, the area of whole ploughing quick-witted box 10 a little has greatly been reduced, and walking axle 6 level sets up and makes can direct mount walking wheel 400 on walking axle 6, compare in the condition of ploughing the machine a little among the prior art both including the derailleur box and including the lower case that walks that is used for installing transmission shaft and walking axle 6, this embodiment can save the lower case that walks of ploughing the machine a little, and then further improved the miniaturization and the lightweight of ploughing the machine a little.

In addition, in this embodiment, through the arrangement of the transmission structure of the transmission 200, the clutch 600 and the traveling shaft 6 in different chambers on the case 10, the installation of the transmission mechanism of the transmission 200 and the installation of the traveling shaft 6 are completed on one case 10, on one hand, the lower traveling case in the prior art is omitted in this embodiment, the cost of the case 10 is greatly reduced, and the miniaturization and the light weight of the case 10 are realized; on the other hand, also because the cancellation of lower walking case for whole machine of ploughing a little highly can greatly reduce, and then make things convenient for the quick-witted direct mechanical automation operation that carries out in the crops below space that branch leaf is short apart from ground of ploughing a little of this scheme, solved the difficult problem among the prior art, be favorable to improving agricultural operating efficiency.

The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims

1. Four-wheel drive machine of ploughing a little, including frame, driver, derailleur, walking wheel and cutter, the driver is used for providing power for the derailleur, and driver and derailleur are all fixed in the frame, and the derailleur includes the box and rotates main shaft, walking output shaft and the cutter output shaft of connecting on the box, and the walking output shaft drives the walking wheel and rotates, and the cutter output shaft drives the cutter rotation, its characterized in that: the gear shifting device comprises a main shaft, a box body and a gear shifting gear, wherein the main shaft is axially and slidably connected with the gear shifting gear, the box body is rotatably connected with a transition gear set, the transition gear set comprises a first transition gear and a second transition gear which are fixedly connected, a fixed gear is fixedly connected onto a cutter output shaft, the fixed gear is normally meshed with the first transition gear, and the gear shifting gear can be meshed with the fixed gear or the second transition gear.

2. The four-wheel drive mini-tiller of claim 1, wherein: the power transmission is realized between the main shaft and the walking output shaft through a transmission gear set, the transmission gear set comprises a main gear and a transmission set, the main gear is fixedly connected to the main shaft, the transmission set is used for transmitting the power of the main gear on the main shaft to an auxiliary gear, the transmission set comprises a transmission gear and an auxiliary gear, the transmission gear is sleeved on the cutter output shaft in a hollow mode, the auxiliary gear is connected to the walking output shaft, the transmission gear can be meshed with the auxiliary gear, and the transmission gear can be meshed with the main gear.

3. The four-wheel drive mini-tiller of claim 2, wherein: the transmission gear comprises a first transmission gear and a second transmission gear which are sleeved on the cutter output shaft in an empty mode, the pinion comprises a first pinion and a second pinion, the first pinion is sleeved on the walking output shaft in an empty mode, the second pinion rotates synchronously with the walking output shaft, the first transmission gear, the second transmission gear and the first pinion respectively comprise a large gear and a small gear which are fixedly connected, the large gear of the first transmission gear is meshed with the main gear, the small gear of the first transmission gear is meshed with the large gear of the first pinion, the small gear of the first pinion is meshed with the large gear of the second transmission gear, and the small gear of the second transmission gear can be meshed with the second pinion.

4. The four-wheel drive mini-tiller of claim 3, wherein: the large gear of the first transmission gear and the large gear of the second transmission gear are located in the middle of the first transmission gear, the small gear of the first transmission gear and the small gear of the second transmission gear are located on two sides of the first transmission gear, and a yielding space is formed between the large gear of the first auxiliary gear and the small gear and used for avoiding the large gear of the first transmission gear.

5. The four-wheel drive mini-tiller of claim 4, wherein: the second auxiliary gear is axially and slidably connected to the walking output shaft and further comprises a reverse gear rotatably connected to the box body, the second transmission gear is further provided with a matched gear meshed with the reverse gear, and the second auxiliary gear can be further meshed with the reverse gear.

6. The four-wheel drive mini-tiller of claim 5, wherein: the reverse gear and the transition gear are positioned on two sides of the transmission gear.

7. The four-wheel drive mini-tiller of claim 1, wherein: a speed changing cavity and a walking cavity are arranged in the box body, the main shaft, the walking output shaft and the cutter output shaft are all positioned in the speed changing cavity, the wall of the walking cavity is rotatably connected with a walking shaft, and the walking shaft is fixedly connected with a walking wheel; a transmission gear is arranged between the walking shaft and the walking output shaft and is positioned in the walking cavity.

8. The four-wheel drive mini-tiller of claim 7, wherein: the box body is internally provided with a clutch cavity, the walking cavity and the clutch cavity are positioned at the same side of the speed changing cavity, a clutch is connected between the driver and the main shaft, and the clutch is positioned in the clutch cavity.

9. The four-wheel drive mini-tiller of claim 8, wherein: the clutch cavity is communicated with the walking cavity.

10. The four-wheel drive mini-tiller of claim 1, wherein: the cutter comprises a cutter shaft and a blade, the cutter shaft is rotatably connected to the rack, the cutter output shaft drives the cutter shaft to rotate, the blade is fixedly connected to the cutter shaft, the blade comprises a cutter handle and a bent cutter body, the cutter body is bent relative to the plane where the cutter handle is located, a cutting edge is arranged on the cutter body, and the cutting edge is twisted towards the inner side of the bent cutter body.