CN217583097U - Be applied to gearbox structure of miniature four-wheel drive rural area supervisor - Google Patents

Abstract

The utility model relates to a four-wheel drive rural area supervisor technical field discloses a gearbox structure for miniature four-wheel drive rural area supervisor, including last box and lower box, it is connected with lower box to go up the box, and go up and be equipped with the clutch assembly in the box, the rotatable supporting of bevel gear axle is in last box, bevel gear combination splined connection is on the biax, the triaxial tridentate of triaxial in the lower box is transmitted in the bevel gear combination transmission, transmit power in the triaxial by the triaxial tridentate, the big duplex tooth of triaxial walking respectively with the four-axis bidentate of four-axis, four-axis one tooth combines, realize walking first gear, two shelves gear shift function, the big duplex tooth of walking combines with the big duplex tooth of six-axis, through the transmission of four-axis one tooth, the four-axis duplex tooth combines respectively with a tooth, the three-axis tridentate realizes walking third gear, four-gear function gear shift, this scheme simple structure can supply the many gears selection, the speed reduction effect is obvious, clutch transmission efficiency is high, the low power consumption, long service life.

Description

Be applied to gearbox structure of miniature four-wheel drive rural area supervisor

Technical Field

The utility model relates to a four-wheel drive rural area supervisor technical field specifically is a gearbox structure who is applied to miniature four-wheel drive rural area supervisor.

Background

A field management machine is a small-sized field tillage machine mainly used for working in greenhouses, orchards and the like, is also called a universal management machine and is an agricultural machine product specially designed for working in orchards, vegetable fields, greenhouses, hilly slopes and small plots (water and dry fields).

At present, the existing miniature four-wheel drive field management machine is driven by an external belt, is subjected to straight-tooth multi-stage speed change, is linked with the walking rotation speed, cannot be controlled respectively, has few walking gears, cannot reach the ideal rotation speed, is difficult to steer, is inconvenient for field cultivation, is easy to slip due to belt transmission, has large power loss and short service life.

Therefore, based on the above technical problems, it is necessary for those skilled in the art to develop a transmission structure for a miniature four-wheel-drive field management machine.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a be applied to gearbox structure of miniature four-wheel drive rural area supervisor to solve among the prior art keep off the position selection few, can't control respectively keep off the position, be not convenient for about turn to wantonly, be not suitable for field farming scheduling problem.

In order to achieve the above object, the utility model provides a following technical scheme: a gearbox structure applied to a miniature four-wheel drive field management machine comprises an upper box body and a lower box body, wherein the upper box body is connected with the lower box body, a clutch assembly is arranged in the upper box body, a bevel gear shaft is arranged on the clutch assembly, a second shaft is arranged on one side of the bevel gear shaft, a bevel gear combination is arranged on the second shaft, and a variable speed adjusting mechanism is arranged in the lower box body;

the speed change adjusting mechanism comprises three shafts arranged in the lower box body, wherein three shaft one teeth, three shaft two teeth, three shaft three teeth and large walking duplex teeth are sequentially arranged on the three shafts, the three shaft three teeth are combined and matched with the bevel gear, one side of each three shaft is provided with a four shaft, the other side of each three shaft is provided with six shafts, the four shafts are respectively provided with four shaft duplex teeth, four shaft one teeth, four shaft two teeth and four shaft three teeth, and the six shafts are sequentially provided with six shaft one teeth, six shaft small duplex teeth and six shaft large duplex teeth;

a steering adjusting mechanism is arranged on one side of each four shaft, the steering adjusting mechanism comprises five shafts arranged in a lower box body, a first tooth of each five shaft is arranged on each five shaft, a left half shaft and a right half shaft are respectively arranged on one side of the first tooth of each five shaft, the left half shaft and the right half shaft penetrate through the lower box body and extend outwards, a walking output gear is jointly arranged on each left half shaft and each right half shaft, clutch sleeves are arranged on two sides of each walking output gear, and the two clutch sleeves are respectively connected with the left half shaft and the right half shaft;

one side of the six small duplex teeth is provided with a rotary tillage power mechanism, the rotary tillage power mechanism comprises seven shafts arranged in the lower box body, seven shafts are provided with seven first teeth and seven second teeth, one side of the seven shafts is provided with eight shafts, seven second teeth are arranged on the eight shafts, small chain wheels are arranged on the eight shafts, a hexagonal shaft penetrates through the tail of the lower box body, a middle chain wheel is arranged on the hexagonal shaft in the lower box body, and the middle chain wheel is connected with the small chain wheels through a chain.

Preferably, the two shafts, the three shafts, the four shafts, the five shafts, the left half shaft, the right half shaft, the six shafts, the seven shafts, the eight shafts and the hexagonal shaft are all rotatably connected with the box body through bearings.

Preferably, the three-shaft two teeth are matched with one six-shaft tooth, the six-shaft small duplex teeth are matched with one seven-shaft tooth, the seven-shaft two teeth are matched with one eight-shaft seven-shaft tooth, and two ends of the hexagonal shaft are connected with a driven sprocket of the rotary tillage assembly through splines, so that the functions of rotary tillage, ditching and grass discharging in forward rotation or reverse rotation can be realized.

Preferably, the walking large duplex teeth are respectively matched with four-shaft two teeth on the four shaft and four-shaft one teeth, so that the walking first-gear and second-gear shifting functions are realized;

the walking large duplex teeth are matched with the six-shaft large duplex teeth of the six shafts and are transmitted by the four-shaft one-tooth to realize the reverse gear function;

the four-shaft duplex gear is respectively matched with the three-shaft one gear and the three-shaft three gear, so that the functions of three-gear walking and four-gear shifting are realized.

Preferably, six steel balls are respectively arranged on two sides of the walking output gear, and the six steel balls are sequentially embedded with six R grooves in the left half shaft and the right half shaft and are controlled to be combined and separated by a clutch sleeve so as to control the left walking output shaft and the right walking output shaft to rotate or stand still.

Preferably, the clutch assembly adopts a plate friction clutch, and the bevel gear assembly is a combination of a bevel gear and a straight gear.

Compared with the prior art, the beneficial effects of the utility model are that:

(1) The utility model relates to a be applied to gearbox structure of miniature four-wheel drive rural area supervisor, the variable speed adjustment mechanism of setting, the rotatable supporting of bevel gear axle is in last box, bevel gear combination splined connection is epaxial two, the triaxial tridentate of triaxial in the lower box is transmitted in the bevel gear combination, transmit power in the triaxial by the triaxial tridentate, the big duplex tooth of triaxial walking respectively with four-axis epaxial four-axis two-tooth, four-axis one-tooth combines, realize walking one grade, two grades of gear shift functions, the big duplex tooth of walking combines with the big duplex tooth of six-axis, through the transmission of four-axis one-tooth, realize the speed in reverse function, four-axis duplex tooth and triaxial one-tooth, the triaxial tridentate combines respectively, realize walking three grades of gears, four grades of gear shift functions, this scheme simple structure, can supply many gears to select, the speed reduction effect is obvious, clutch transmission efficiency is high, the low power consumption, long service life.

(2) The utility model relates to a be applied to gearbox structure of miniature four-wheel drive rural area supervisor, the steering adjustment mechanism that sets up, the four-axis is with power transmission in a five-axis tooth, a five-axis tooth transmission is to on the walking output gear of walking steering mechanism, respectively have six steel balls and left semi-axis about the walking output gear, six R groove gomphosis of right semi-axis, combine and separate through separation and reunion cover control, control a left side, the rotation or static of walking output shaft in the right side, thereby realize turning left or turning right, the walking is inlayed by the steel ball mutually, outer separation and reunion cover control, semi-axis R groove design about, the problem of former four-wheel drive rural area supervisor steering separation difficulty has been solved, can relax about turn to wantonly.

(3) The utility model relates to a be applied to gearbox structure of miniature four-wheel drive rural area supervisor, the rotary tillage power unit of setting, rotary tillage power transmits a tooth of six by the triaxial bidentate transfer, the rotary tillage, seven a teeth of seven epaxial little duplex transmission of ditching switching-over function are transmitted by six epaxial little duplex, again through the transmission of seven bidentate, transmit the well sprocket of hexagonal axle through the chain by eight epaxial little movable chain wheels, hexagonal axle and rotary tillage driven sprocket splined connection, corotation or reversal rotary tillage can be realized, the ditching, play grass function, the rotary tillage is separately with the walking rotational speed, can control respectively, the rural area supervisor rotary tillage of being convenient for, the ditching, the use of play grass function, the operation is light reliable really realized, the function is diversified.

Drawings

FIG. 1 is a schematic view of the internal structure of the lower case of the present invention;

fig. 2 is a schematic view of the sectional structure of the upper box body of the present invention.

In the reference symbols: 1. an upper box body; 2. a clutch assembly; 3. a bevel gear shaft; 4. two axes; 5. a bevel gear assembly; 6. three axes; 7. three shafts and one tooth; 8. three shafts and two teeth; 9. three-axis and three-gear; 10. walking big duplex teeth; 11. a fourth axis; 12. four-axis double teeth; 13. one tooth is arranged on the four shafts; 14. four-axis two teeth; 15. four-axis three-tooth; 16. five axes; 17. one tooth is arranged on five shafts; 18. a travel output gear; 19. a clutch sleeve; 20. a left half shaft; 21. a right half shaft; 22. six shafts; 23. one tooth is arranged on the six shafts; 24. six-axis small double teeth; 25. six-shaft large duplex teeth; 26. seven axes; 27. one tooth is arranged on the seven shafts; 28. seven-axis two teeth; 29. eight axes; 30. a small sprocket; 31. a hexagonal shaft; 32. a middle chain wheel; 33. and (5) a lower box body.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the present invention is not limited to the limitations of the specific embodiments of the present disclosure.

Examples

Referring to fig. 1 and 2, the present invention provides a technical solution of a gearbox structure applied to a miniature four-wheel drive field management machine: the transmission device comprises an upper box body 1 and a lower box body 33, wherein the upper box body 1 is connected with the lower box body 33, a clutch assembly 2 is arranged in the upper box body 1, specifically, the clutch assembly 2 adopts a plate type friction clutch and is connected with external power through the clutch assembly 2, a bevel gear shaft 3 is arranged on the clutch assembly 2, a secondary shaft 4 is arranged on one side of the bevel gear shaft 3, a bevel gear assembly 5 is arranged on the secondary shaft 4, specifically, the bevel gear assembly 5 is a combination of a bevel gear and a straight gear, a bevel gear part is meshed with the bevel gear shaft 3, and a variable speed adjusting mechanism is arranged in the lower box body 33 and can realize multi-gear adjustment of a transmission;

the speed change adjusting mechanism comprises a three shaft 6 arranged in the lower box body 33, a three shaft one tooth 7, a three shaft two tooth 8, a three shaft three tooth 9 and a large walking duplex tooth 10 are sequentially arranged on the three shaft 6, the three shaft three tooth 9 is matched with the bevel gear combination 5, a four shaft 11 is arranged on one side of the three shaft 6, a six shaft 22 is arranged on the other side of the three shaft 6, a four shaft duplex tooth 12, a four shaft one tooth 13, a four shaft two tooth 14 and a four shaft three tooth 15 are respectively arranged on the four shaft 11, and a six shaft one tooth 23, a six shaft small duplex tooth 24 and a six shaft large duplex tooth 25 are sequentially arranged on the six shaft 22;

in the above embodiment, power acts on the clutch assembly 2, the clutch assembly 2 outputs power, the bevel gear shaft 3 is meshed with the bevel gear assembly 5 to change the rotation direction, the bevel gear assembly 5 drives the secondary shaft 4, the straight gear part of the bevel gear assembly 5 is transmitted to the three-shaft three-teeth 9 in the lower box body 33, power is transmitted to the three-shaft 6 from the three-shaft three-teeth 9, and the large walking two-teeth 10 on the three-shaft 6 are respectively combined with the four-shaft two-teeth 14 and the four-shaft one-teeth 13 on the four-shaft 11, namely, the shifting functions of walking first gear and second gear are correspondingly realized; the walking large duplex teeth 10 are combined with the six-shaft large duplex teeth 25 of the six shaft 22 to realize a reverse gear function, and the four-shaft duplex teeth 12 are respectively combined with the three-shaft one-tooth 7 and the three-shaft three-tooth 8 to realize walking three-gear and four-gear shifting functions.

A steering adjusting mechanism is arranged on one side of the four shaft 11, the steering adjusting mechanism comprises five shafts 16 arranged in a lower box body 33, five shafts 16 are provided with five shafts one teeth 17, one side of each five shaft one tooth 17 is provided with a left half shaft 20 and a right half shaft 21 respectively, the left half shaft 20 and the right half shaft 21 penetrate through the lower box body 33 and extend outwards, the left half shaft 20 and the right half shaft 21 are provided with a walking output gear 18 together, clutch sleeves 19 are arranged on two sides of the walking output gear 18, the two clutch sleeves 19 are respectively connected with the left half shaft 20 and the right half shaft 21, specifically, two ends of the left half shaft 20 and the right half shaft 21 are respectively connected with a walking wheel assembly, and the walking wheel assembly is driven to walk by the left half shaft 20 and the right half shaft 21;

in the above embodiment, the four shafts 11 transmit power to the five shafts, one tooth 17, the five shafts, one tooth 17 transmit power to the walking output gear 18 of the walking steering mechanism, six steel balls are respectively arranged at the left and right of the walking output tooth to be embedded in six R grooves of the left half shaft 20 and the right half shaft 21, and the combination and separation are controlled by the clutch sleeve 19 to control the rotation or the static of the left and right walking output shafts, so that the left turning or the right turning is realized.

One side of the six-shaft small duplex gear 24 is provided with a rotary tillage power mechanism, the rotary tillage power mechanism comprises a seven shaft 26 arranged in a lower box body 33, the seven shaft 26 is provided with a seven shaft one gear 27 and a seven shaft two gear 28, one side of the seven shaft 26 is provided with an eight shaft 29, the eight shaft 29 is provided with a seven shaft two gear 28, the eight shaft 29 is provided with a small chain wheel 30, the tail part of the lower box body 33 is penetrated with a hexagonal shaft 31, the hexagonal shaft 31 positioned in the lower box body 33 is provided with a middle chain wheel 32, and the middle chain wheel 32 is connected with the small chain wheel 30 through a chain;

in the above embodiment, the rotary tillage power is transmitted to the six-shaft one-tooth 23 from the three-shaft two-tooth 8, the rotary tillage, ditching and reversing functions are transmitted to the seven-shaft one-tooth 27 of the seven-shaft 26 from the six-shaft small duplex 24, and then transmitted to the middle chain wheel 32 of the hexagonal shaft 31 from the eight-shaft 29 small movable chain wheel 30 through the chain by the transmission of the seven-shaft two-tooth 28, the hexagonal shaft 31 is connected with the driven chain wheel of the rotary tillage component through the spline, and the external rotary tillage component is driven by the hexagonal shaft 31, so that the rotary tillage, ditching and grass discharging functions in forward rotation or reverse rotation can be realized.

Referring to fig. 1 and 2, further, the two shafts 4, the three shafts 6, the four shafts 11, the five shafts 16, the left half shaft 20, the right half shaft 21, the six shafts 22, the seven shafts 26, the eight shafts 29 and the hexagonal shaft 31 are rotatably connected with the box body through bearings.

In the present embodiment, the two shafts 4, the three shafts 6, the four shafts 11, the five shafts 16, the left half shaft 20, the right half shaft 21, the six shafts 22, the seven shafts 26, the eight shafts 29 and the hexagonal shaft 31 are all driven by bearings to ensure the stability of rotation.

Referring to fig. 1 and 2, further, the three-shaft two teeth 8 are matched with the six-shaft one teeth 23, the six-shaft small duplex teeth 24 are matched with the seven-shaft one teeth 27, the seven-shaft two teeth 28 are matched with the seven-shaft one teeth 27 on the eight shafts 29, and two ends of the hexagonal shaft 31 are connected with a driven sprocket of the rotary tillage assembly through splines, so that the functions of rotary tillage, ditching and grass discharging in forward rotation or reverse rotation can be realized.

In the embodiment, the rotary tillage, ditching and grass discharging functions can be realized by driving the hexagonal shaft 31, the rotary tillage and walking rotation speeds are separated and can be controlled respectively, the rotary tillage, ditching and grass discharging functions of the field management machine can be conveniently used, and the operation is easy and reliable and the functions are diversified.

Referring to fig. 1 and 2, further, the large walking double-link gear 10 is respectively matched with the four-shaft two teeth 14 and the four-shaft one teeth 13 on the four shaft 11 to realize the shifting function of the first and second walking gears;

the walking large duplex teeth 10 are matched with the six-shaft large duplex teeth 25 of the six shafts 22 to realize the reverse gear function;

the four-shaft duplex gear 12 is respectively matched with the three-shaft one gear 7 and the three-shaft three gear 9, so that the functions of three-gear walking and four-gear shifting are realized.

In the embodiment, the multi-gear selection can be realized by utilizing the matching among the gears, the speed reduction effect is obvious, the transmission efficiency of the clutch is high, the power consumption is low, and the service life is long.

Referring to fig. 1 and 2, six steel balls are respectively disposed on two sides of the traveling output gear 18, and the six steel balls are sequentially engaged with six R grooves in the left half shaft 20 and the right half shaft 21, and are controlled by the clutch sleeve 19 to be engaged with and disengaged from each other, so as to control the rotation or the standstill of the left and right traveling output shafts.

In the embodiment, the steel balls are embedded, the outer clutch sleeve is used for controlling, and the R grooves of the left half shaft and the right half shaft are designed, so that the problem that the original four-wheel-drive rural management machine is difficult to turn and separate is solved, and the four-wheel-drive rural management machine can turn left and right easily.

Specifically, the utility model discloses a theory of operation and use flow: the power acts on the clutch assembly 2, the clutch assembly 2 outputs power, is engaged with the bevel gear combination 5 by the bevel gear shaft 3, change the direction of rotation, the bevel gear combination 5 drives the biaxial 4, the straight gear part of the bevel gear combination 5 transmits to the triaxial tridentate 9 in the lower box 33, transmit the power from the triaxial tridentate 9 to the triaxial 6, the big double tooth 10 of walking on the triaxial 6 combines with four-axis two-teeth 14, four-axis one-teeth 13 on the four-axis 11 separately, namely realize the first gear of walking, second gear shifts the function correspondingly; the walking large duplex teeth 10 are combined with the six-shaft large duplex teeth 25 of the six shaft 22 to realize a reverse gear function, and the four-shaft duplex teeth 12 are respectively combined with the three-shaft one-tooth 7 and the three-shaft three-tooth 8 to realize walking three-gear and four-gear shift functions;

the four-shaft 11 transmits power to a five-shaft one-tooth 17, the five-shaft one-tooth 17 is transmitted to a walking output gear 18 of a walking steering mechanism, six steel balls are respectively embedded with a left half shaft 20 and a right half shaft 21 at the left and right of the walking output gear, and the combination and separation are controlled by a clutch sleeve 19 to control the rotation or the rest of the left and right walking output shafts so as to realize left rotation or right rotation;

the three-shaft two teeth 8 transmit the rotary tillage and ditching functions to the six-shaft one teeth 23, the six-shaft small duplex 24 transmits the rotary tillage and ditching functions to the seven-shaft one teeth 27 of the seven shafts 26, the eight-shaft 29 small movable chain wheel 30 transmits the rotary tillage and ditching functions to the middle chain wheel 32 of the hexagonal shaft 31 through the chain, the hexagonal shaft 31 is connected with the driven chain wheel of the rotary tillage assembly through a spline, the hexagonal shaft 31 drives the external rotary tillage assembly, and the forward rotation or reverse rotation rotary tillage, ditching and weed discharging functions can be realized until all work sequences are completed.

The above, only be the embodiment of the preferred of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, which are designed to be replaced or changed equally, all should be covered within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "both ends", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the present invention, unless otherwise explicitly specified or limited, the terms "mounted", "disposed", "connected", "fixed", "screwed" and the like are to be understood broadly, and may be, for example, a fixed connection, a detachable connection, or an integral body; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, and may be connected through the inside of two elements or in an interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the above terms in the present invention will be understood by those skilled in the art according to specific situations.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. The gearbox structure applied to the miniature four-wheel-drive field management machine is characterized by comprising an upper box body (1) and a lower box body (33), wherein the upper box body (1) is connected with the lower box body (33), a clutch assembly (2) is arranged in the upper box body (1), an umbrella tooth shaft (3) is arranged on the clutch assembly (2), a secondary shaft (4) is arranged on one side of the umbrella tooth shaft (3), a bevel gear combination (5) is arranged on the secondary shaft (4), and a variable speed adjusting mechanism is arranged in the lower box body (33);

the speed change adjusting mechanism comprises a three shaft (6) arranged in a lower box body (33), wherein three shaft one teeth (7), three shaft two teeth (8), three shaft three teeth (9) and a large walking duplex tooth (10) are sequentially arranged on the three shaft (6), the three shaft three teeth (9) are matched with a bevel gear combination (5), a four shaft (11) is arranged on one side of the three shaft (6), a six shaft (22) is arranged on the other side of the three shaft (6), the four shaft (11) is respectively provided with a four shaft duplex tooth (12), a four shaft one tooth (13), a four shaft two tooth (14) and a four shaft triplex tooth (15), and the six shaft (22) is sequentially provided with a six shaft one tooth (23), a six shaft small duplex tooth (24) and a six shaft large duplex tooth (25);

a steering adjusting mechanism is arranged on one side of the four shafts (11), the steering adjusting mechanism comprises five shafts (16) arranged in a lower box body (33), five shafts (16) are provided with five shaft one teeth (17), one side of each five shaft one tooth (17) is provided with a left half shaft (20) and a right half shaft (21) respectively, the left half shaft (20) and the right half shaft (21) penetrate through the lower box body (33) and extend outwards, the left half shaft (20) and the right half shaft (21) are provided with a walking output gear (18) together, two sides of the walking output gear (18) are provided with clutch sleeves (19), and the two clutch sleeves (19) are connected with the left half shaft (20) and the right half shaft (21) respectively;

one side of the six-shaft small duplex teeth (24) is provided with a rotary tillage power mechanism, the rotary tillage power mechanism comprises seven shafts (26) arranged in a lower box body (33), seven shafts (26) are provided with seven one teeth (27) and seven two teeth (28), one side of each seven shaft (26) is provided with eight shafts (29), the eight shafts (29) are provided with the seven two teeth (28), the eight shafts (29) are provided with small chain wheels (30), the tail part of the lower box body (33) is provided with a hexagonal shaft (31) in a penetrating manner, the hexagonal shaft (31) is positioned in the lower box body (33) and provided with a middle chain wheel (32), and the middle chain wheel (32) is connected with the small chain wheels (30) through a chain.

2. The gearbox structure applied to the miniature four-wheel-drive pastoral management machine according to claim 1, wherein: the two-shaft (4), the three-shaft (6), the four-shaft (11), the five-shaft (16), the left half shaft (20), the right half shaft (21), the six-shaft (22), the seven-shaft (26), the eight-shaft (29) and the hexagonal shaft (31) are all rotationally connected with the box body through bearings.

3. The gearbox structure applied to the miniature four-wheel-drive pastoral management machine according to claim 1, wherein: the three-shaft double-tooth rotary tillage machine is characterized in that the three-shaft double teeth (8) are matched with the six-shaft one teeth (23), the six-shaft small duplex teeth (24) are matched with the seven-shaft one teeth (27), the seven-shaft double teeth (28) are matched with the seven-shaft one teeth (27) on the eight shafts (29), and two ends of the hexagonal shaft (31) are connected with a driven chain wheel of the rotary tillage assembly through splines, so that the functions of rotary tillage, ditching and grass discharging in forward rotation or reverse rotation can be realized.

4. The gearbox structure applied to the miniature four-wheel-drive pastoral management machine according to claim 1, wherein: the large walking duplex teeth (10) are respectively matched with four-shaft two teeth (14) and four-shaft one teeth (13) on the four shafts (11) to realize the functions of shifting a walking first gear and a walking second gear;

the walking large duplex teeth (10) are matched with the six-shaft large duplex teeth (25) of the six shaft (22) and are transmitted by the four-shaft one-tooth (13), so that the reverse gear function is realized;

the four-shaft duplex teeth (12) are respectively matched with the three-shaft one teeth (7) and the three-shaft three teeth (9) to realize the functions of three-gear walking and four-gear shifting.

5. The gearbox structure applied to the miniature four-wheel-drive pastoral management machine according to claim 1, wherein: six steel balls are respectively arranged on two sides of the walking output gear (18), and the six steel balls are sequentially embedded with six R grooves in the left half shaft (20) and the right half shaft (21) and are controlled to be combined and separated by a clutch sleeve (19) to control the rotation or the standstill of the left and right walking output shafts.

6. The gearbox structure applied to the miniature four-wheel-drive pastoral management machine according to claim 1, wherein: the clutch assembly (2) adopts a plate type friction clutch, and the bevel gear combination (5) is a combination of a bevel gear and a straight gear.

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