CN108916320B - Planetary structure land leveler and durable land leveler composed of same - Google Patents

Planetary structure land leveler and durable land leveler composed of same Download PDF

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CN108916320B
CN108916320B CN201810806564.2A CN201810806564A CN108916320B CN 108916320 B CN108916320 B CN 108916320B CN 201810806564 A CN201810806564 A CN 201810806564A CN 108916320 B CN108916320 B CN 108916320B
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bevel gear
gear
shell
central shaft
upper shell
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CN108916320A (en
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卢伟
姚嘉
匡兵
周俊
卢俊琪
栾积毅
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Guilin University of Electronic Technology
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Guilin University of Electronic Technology
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H1/00Toothed gearings for conveying rotary motion
    • F16H1/28Toothed gearings for conveying rotary motion with gears having orbital motion
    • F16H1/2854Toothed gearings for conveying rotary motion with gears having orbital motion involving conical gears
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01BSOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
    • A01B49/00Combined machines
    • A01B49/02Combined machines with two or more soil-working tools of different kind
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H57/00General details of gearing
    • F16H57/08General details of gearing of gearings with members having orbital motion
    • F16H57/082Planet carriers

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Soil Sciences (AREA)
  • Environmental Sciences (AREA)
  • Transmission Devices (AREA)
  • Retarders (AREA)

Abstract

A planet structure land leveler and a durable land leveler composed of the planet structure land leveler relate to a land leveler and a land leveler. The current leveler level land mode is single, and level land effect is not enough even and efficiency is not high, and the high life that leads to the level land component of consumptive material height is short. The support frame is connected with a tractor, N multi-degree-of-freedom land levellers are arranged on the support frame in parallel, each multi-degree-of-freedom land leveller is correspondingly provided with a motor, a central shaft is vertically arranged between an upper shell and a lower shell, one end of a power input shaft penetrates through the outer wall of the upper shell and is arranged in the upper shell, a first sun gear is sleeved on the central shaft, the upper end of each support column is meshed with the first sun gear through a planetary gear, the lower end of each support column is fixedly connected to the top of the lower shell, the lower end of the central shaft is arranged in the lower shell and is sleeved with a second driving bevel gear, a plurality of packing augers are uniformly distributed around the lower shell, and one end of each. The invention is used for flat ground.

Description

Planetary structure land leveler and durable land leveler composed of same
Technical Field
The invention relates to a land leveler, and belongs to the technical field of agricultural machinery.
Background
An agricultural land leveler is used for a farmland construction machine for farmland leveling operation. It can also be used for building terraced fields, leveling roads and fields, etc. The agricultural land leveler consists of a frame, a traction suspension device, a land leveling shovel, an operation and adjustment device of the land leveling shovel, a scarification shovel and the like. The anti-profiling device has the anti-profiling performance that the land leveling shovel does not move up and down along with the fluctuation of the ground surface so as to obtain the effect of leveling the farmland. There are three types of agricultural graders: the traction type land leveler has the advantages of large longitudinal span, larger distance between the dozer blade and the rear wheel of the tractor, good anti-profiling performance, good land leveling quality, reliable work, complex structure and large metal consumption, and is suitable for large-area land leveling operation. The walking device has two types, namely a four-wheel type walking device and a two-wheel type walking device. The front ends of the two wheels are supported by a tractor. The suspended land leveler has the advantages of simple structure, light weight, less steel consumption, flexibility in maneuvering, small longitudinal span, small distance between the land leveling shovel and the rear wheel of the tractor, poor anti-profiling performance and poor land leveling quality, and is suitable for small land operation. The front end of the frame of the semi-suspension type land leveller is articulated with the suspension mechanism of the tractor, and the rear end is provided with a supporting wheel. Compared with a traction type, the structure is simpler, the weight is lighter, the operation is convenient, and the quality of the ground is better in suspension type. The current leveler level land mode is single, and level land effect is not enough even and efficiency is not high, and the high life that leads to the level land component of consumptive material height is short.
Disclosure of Invention
The invention aims to provide a planetary structure land leveler and a durable land leveler consisting of the same, and the planetary structure land leveler is used for solving the problems that the conventional land leveler has a single land leveling mode, is not uniform enough in land leveling effect and low in efficiency, and has short service life of a land leveling member due to high consumption.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a planet structure land leveler comprises a power input shaft, an upper shell, a central shaft, a planet carrier, a lower shell, a planet assembly and a plurality of packing augers, wherein the planet assembly comprises a first driven bevel gear, a sun gear and a second driving bevel gear, the upper shell is arranged above the lower shell, the central shaft is vertically arranged between the upper shell and the lower shell, the upper end of the central shaft is arranged in the upper shell, the first driven bevel gear is sleeved at the upper end of the central shaft, one end of the power input shaft penetrates through the outer wall of the upper shell and is arranged in the upper shell, the first driving bevel gear is arranged in the upper shell and is sleeved on the power input shaft, the first driving bevel gear is meshed with the first driven bevel gear, the sun gear is sleeved on the central shaft, the planet carrier comprises at least two support columns, the upper end of each support column is meshed with the sun gear through a planet gear, every planetary gear still meshes with the inner wall of last casing mutually, and the lower extreme fixed connection of every support column is at the top of casing down, the lower extreme setting of center pin is equipped with second drive bevel gear in the casing down and this pot head, and a plurality of augers equipartitions are around the casing down, and the outer wall that the casing was passed down to the one end of every auger meshes with second drive bevel gear mutually.
As a preferable scheme: each planetary gear still meshes with the inner wall of last casing mutually, and the inner wall of going up the casing has the ring gear along its circumferencial direction processing promptly, and the ring gear includes a plurality of internal teeth, and a plurality of internal teeth mesh with planetary gear mutually.
As a preferable scheme: each auger is provided with a second driven bevel gear, each second driven bevel gear is fixedly installed on the corresponding auger, each second driven bevel gear is meshed with the second driving bevel gear, and the number of the augers ranges from 4 to 8.
As a preferable scheme: at least two fixed lifting lugs are arranged on the outer wall of the upper shell.
As a preferable scheme: the shape of going up the casing is the cylinder, and the casing is including supporting a section of thick bamboo, upper cover and lower cover down, supporting a vertical setting of section of thick bamboo, the top and the bottom of supporting a section of thick bamboo are provided with upper cover and lower cover respectively, and processing has the through-hole that the cooperation center pin set up on covering, sealing connection between upper cover, lower cover and the support section of thick bamboo.
As a preferable scheme: the land leveler comprises a tractor, a support frame, N motors and N land levelers, wherein the support frame is connected with the tractor, the N land levelers are arranged on the support frame in parallel, each land leveller is correspondingly provided with one motor, each land leveller comprises a power input shaft, an upper shell, a central shaft, a planet carrier, a lower shell, a planet assembly and a plurality of packing augers, the planet assembly comprises a first driven bevel gear, a sun gear and a second driven bevel gear, the upper shell is arranged above the lower shell, the central shaft is vertically arranged between the upper shell and the lower shell, the upper end of the central shaft is arranged in the upper shell, the end of the central shaft is sleeved with the first driven bevel gear, one end of the power input shaft penetrates through the outer wall of the upper shell and is arranged in the upper shell, the first driving bevel gear is arranged in the upper shell and sleeved on the power input shaft, and is meshed with the first driven, the other end of the power input shaft is connected with an output shaft of a corresponding motor, the sun wheel is sleeved on the central shaft, the planet carrier comprises at least two support columns, the upper end of each support column is meshed with the sun wheel through a planetary gear, the lower end of each support column is fixedly connected to the top of the lower shell, the lower end of the central shaft is arranged in the lower shell, the end of the central shaft is sleeved with a second driving bevel gear, a plurality of packing augers are uniformly distributed around the lower shell, and one end of each packing auger penetrates through the outer wall of the lower shell to be meshed with the second driving bevel gear.
As a preferable scheme: each auger is correspondingly provided with a second driven bevel gear, each second driven bevel gear is fixedly arranged on the corresponding auger, and each second driven bevel gear is meshed with the second driving bevel gear.
As a preferable scheme: at least two fixed lifting lugs are arranged on the outer wall of the upper shell.
As a preferable scheme: the shape of going up the casing is the cylinder, and the casing is including supporting a section of thick bamboo, upper cover and lower cover down, supporting a vertical setting of section of thick bamboo, the top and the bottom of supporting a section of thick bamboo are provided with upper cover and lower cover respectively, and processing has the through-hole that the cooperation center pin 4 set up on covering, sealing connection between upper cover, lower cover and the support section of thick bamboo.
As a preferable scheme: the number of the packing augers ranges from 4 to 8.
The invention has the following beneficial effects:
1. the invention has reasonable structural design and convenient operation, can realize revolution land leveling effect and rotation land leveling effect by matching the power input shaft, the upper shell, the central shaft, the planet carrier, the lower shell and the planet assembly, and has stable and reliable leveling effect.
2. The revolution land leveling effect is that the plurality of augers realize the effect of horizontal rotation around the lower shell under the driving of at least two support columns, the rotation land leveling effect is that each auger can also realize the effect of self rotation through the meshing of the second driven bevel gear and the second driving bevel gear, the revolution land leveling effect and the rotation land leveling effect are simultaneously carried out and are mutually matched, and multiple scraping and twisting can effectively break soil blocks or other bulges, so that the soil particles of the finished surface soil are uniform in size, the intervals among the soil particles are uniform, the soil particle size measured according to a sample is less than or equal to 0.8cm, the depth of the leveled soil is 10-20 cm, and the beneficial planting environment is effectively provided for subsequent agricultural cultivation.
3. The land leveling mode of the traditional land leveling machine is broken through, the effect of soil surface finishing is more uniform and smoother, time and labor are saved, the service life of the auger is effectively saved, and the waste of consumables is reduced to the maximum extent.
Drawings
FIG. 1 is a schematic perspective view of the first embodiment;
fig. 2 is a schematic perspective view showing a connection relationship between the first drive bevel gear 8, the first driven bevel gear 9, the central shaft 4, the sun gear 10 and the planetary gears 11;
fig. 3 is a schematic perspective view showing the connection relationship between the upper casing 2, the central shaft 4, the sun gear 10 and the planetary gears 11;
fig. 4 is a schematic perspective view showing a connection relationship between the lower housing 6, the plurality of packing augers 7, the second drive bevel gear 13 and the second driven bevel gear 14;
fig. 5 is a schematic front view of the second embodiment.
Detailed Description
The first embodiment is as follows: with reference to fig. 1, 2, 3 and 4, the present embodiment includes a power input shaft 1, an upper housing 2, a central shaft 4, a planet carrier, a lower housing 6, a planetary assembly and a plurality of packing augers 7, wherein the planetary assembly includes a first driven bevel gear 9, a sun gear 10 and a second driven bevel gear 13, the upper housing 2 is disposed above the lower housing 6, the central shaft 4 is vertically disposed between the upper housing 2 and the lower housing 6, the upper end of the central shaft 4 is disposed in the upper housing 2 and the end thereof is sleeved with the first driven bevel gear 9, one end of the power input shaft 1 passes through the outer wall of the upper housing 2 and is disposed in the upper housing 2, the first driven bevel gear 8 is disposed in the upper housing 2 and is sleeved on the power input shaft 1, the first driven bevel gear 8 is engaged with the first driven bevel gear 9, the sun gear 10 is sleeved on the central shaft 4, the planet carrier includes at least two support columns 5, the upper end of every support column 5 meshes with sun gear 10 mutually through a planetary gear 11, every planetary gear 11 still meshes with ring gear 12 on the inner wall of last casing 2 mutually, and the lower extreme fixed connection of every support column 5 is at the top of casing 6 down, the lower extreme setting of center pin 4 is equipped with second drive bevel gear 13 in casing 6 down and this pot head, and a plurality of augers 7 equipartitions are around casing 6 down, and the connecting axle of every auger 7 one end passes the outer wall of casing 6 down and is connected with second driven bevel gear 14.
The depth range of each auger entering the soil is 10-20 cm.
The auger 7 comprises a connecting shaft and a reamer, wherein the reamer is 1 or 2 spiral cutters and is fixedly connected to the outer wall of the connecting shaft, and the cutting edge end of the reamer faces outwards.
The planet carrier comprises at least two support columns 5, the number of the support columns 5 is 2m, m is 1, 2 and 3, namely the number of the planet gears 11 is 2m, m is 1, 2 or 3, the two planet gears 11 are symmetrically arranged on the outer circumferential surface of the sun gear 10, the arrangement can ensure that radial loads of the planet structure of the planet carrier are mutually offset, the bearing load of a shaft and the bearing is small, the service life is long, the load is distributed on the planet gears 11, the transmission load on each meshing tooth of the planet gear 11 is small, the gear design adopts a small modulus, the size is small, the weight is light, and the structure is compact.
The second driven bevel gears 14 are symmetrically arranged, the number of the second driven bevel gears is 2m, and m is 1, 2, 3 or 4. The second driven bevel gears 14 are meshed with the second driving bevel gears 13 and are symmetrically arranged in the circumferential direction, the second driving bevel gears 13 are balanced by radial force, and transmission is stable and reliable.
The second embodiment is as follows: this embodiment is a further limitation of the first embodiment, and each of the planet gears 11 is also engaged with a ring gear 12 on the inner wall of the upper casing 2, that is, the inner wall of the upper casing 2 is processed with the ring gear 12 along the circumferential direction thereof, and the ring gear 12 includes a plurality of internal teeth which are engaged with the planet gears 11.
The third concrete implementation mode: the embodiment is further limited by the first specific embodiment, each auger 7 is correspondingly provided with a second driven bevel gear 14, each second driven bevel gear 14 is fixedly installed on a connecting shaft of the corresponding auger 7, each second driven bevel gear 14 is meshed with a second driving bevel gear 13, the number of the augers 7 is 2m, and m is 1, 2, 3 or 4.
The fourth concrete implementation mode: the present embodiment is further limited to the first, second or third embodiment, and at least two fixing lugs 3 are disposed on the outer wall of the upper casing 2. When fixed lug 3 is two, two fixed lugs 3 symmetry set up on the outer wall of last casing 2, and fixed lug 3 is used for cooperating casing 2 to fix a position, makes last casing 2 can obtain effective support.
The fifth concrete implementation mode: the embodiment is a further limitation of the first, second, third or fourth embodiment, the upper shell 2 is cylindrical, the lower shell 6 comprises a supporting cylinder, an upper cover and a lower cover, the supporting cylinder is vertically arranged, the top end and the bottom end of the supporting cylinder are respectively provided with the upper cover and the lower cover, the upper cover is provided with a through hole matched with the central shaft 4, the upper cover, the lower cover and the supporting cylinder are connected in a sealing manner, and gear lubricating oil is filled in a cavity enclosed by the upper cover, the lower cover and the supporting cylinder.
The sixth specific implementation mode: the embodiment is described with reference to fig. 1, 2, 3, 4 and 5, and includes a tractor 15, a support frame 16, N motors 17 and N graduators 18, the support frame 16 is connected with the tractor 15, the N graduators 18 are arranged on the support frame 16 in parallel, each graduator 18 is correspondingly provided with one motor 17, each graduator 18 includes a power input shaft 1, an upper shell 2, a central shaft 4, a planet carrier, a lower shell 6, a planet assembly and a plurality of packing augers 7, the planet assembly includes a first driven bevel gear 9, a sun gear 10 and a second driving bevel gear 13, the upper shell 2 is arranged above the lower shell 6, the central shaft 4 is vertically arranged between the upper shell 2 and the lower shell 6, the upper end of the central shaft 4 is arranged in the upper shell 2 and sleeved with the first driven bevel gear 9, one end of the power input shaft 1 penetrates through the outer wall of the upper shell 2 and is arranged in the upper shell 2, first drive bevel gear 8 is in the inside of upper housing 2 and its suit is on power input shaft 1, first drive bevel gear 8 meshes with first driven bevel gear 9 mutually, power input shaft 1's the other end is connected rather than the output shaft of the motor 17 that corresponds, sun gear 10 suit is on center pin 4, the planet carrier includes two piece at least support columns 5, the upper end of every support column 5 meshes with sun gear 10 through a planetary gear 11 mutually, the lower extreme fixed connection of every support column 5 is at the top of casing 6 down, the lower extreme setting of center pin 4 is in casing 6 down and this pot head is equipped with second drive bevel gear 13, a plurality of augers 7 equipartitions are around casing 6 down, the connecting axle of every auger 7 one end passes the outer wall of casing 6 down and is connected with second driven bevel gear 14.
The depth range of each auger entering the soil is 2-5 cm.
The auger 7 comprises a connecting shaft and a reamer, wherein the reamer is 1 or 2 spiral cutters and is fixedly connected to the outer wall of the connecting shaft, and the cutting edge end of the reamer faces outwards.
The planet carrier comprises at least two support columns 5, the number of the support columns 5 is 2m, m is 1, 2 or 3, namely the number of the planet gears 11 is 2m, m is 1, 2 or 3, the two planet gears 11 are symmetrically arranged on the outer circumferential surface of the sun gear 10, the arrangement can ensure that radial loads of the planet structure of the planet carrier are mutually offset, a shaft and a bearing bear small loads, the service life is long, the loads are distributed on the planet gears 11, the transmission load on each meshing tooth of the planet gear 11 is small, the gear design adopts a small modulus, the size is small, the weight is light, and the structure is compact.
The second driven bevel gears 14 are symmetrically arranged, the number of the second driven bevel gears is 2m, and m is 1, 2, 3 or 4. The second driven bevel gears 14 are meshed with the second driving bevel gears 13 and are symmetrically arranged in the circumferential direction, the second driving bevel gears 13 are balanced by radial force, and transmission is stable and reliable.
The power of the power input shaft 1 in the present invention is derived from its corresponding electric motor 17.
The tractor 15 is an existing product, the type of the tractor is not limited, the type of the tractor 15 and the number of the land levelers 18 can be selected according to actual requirements, and the support frame 16 plays a role in supporting the N motors 17 and the N land levelers 18. The value range of N is 2 to 8. The height of the support frame 16 is adjustable.
The seventh embodiment: the sixth embodiment is further limited by that, each auger 7 is correspondingly provided with a second driven bevel gear 14, each second driven bevel gear 14 is fixedly installed on the corresponding auger 7, and each second driven bevel gear 14 is meshed with the second driving bevel gear 13.
The specific implementation mode is eight: the sixth or seventh embodiment is further limited to the sixth or seventh embodiment, and at least two fixing lugs 3 are arranged on the outer wall of the upper shell 2.
The specific implementation method nine: the embodiment is a further limitation of the sixth, seventh or eighth specific embodiment, the upper casing 2 is cylindrical, the lower casing 6 comprises a supporting cylinder, an upper cover and a lower cover, the supporting cylinder is vertically arranged, the top end and the bottom end of the supporting cylinder are respectively provided with the upper cover and the lower cover, the upper cover is provided with a through hole matched with the central shaft 4, the upper cover, the lower cover and the supporting cylinder are connected in a sealing manner, and gear lubricating oil is filled in a cavity enclosed by the upper cover, the lower cover and the supporting cylinder.
The detailed implementation mode is ten: the embodiment is further limited by the sixth, seventh, eighth or ninth embodiment, and the number of the packing augers 7 is 2m, and m is 1, 2, 3 or 4.
The working principle of the invention is as follows:
a first driving bevel gear 8 is arranged on the power input shaft 1, the first driving bevel gear 8 is meshed with a first driven bevel gear 9 on the central shaft 4, the first driven bevel gear 9 is arranged at the upper end of the central shaft 4, a sun gear 10 is arranged in the middle of the central shaft 4, the sun gear 10 is meshed with a planetary gear 11, the planetary gear 11 is arranged on a planet carrier which is fixedly arranged on the lower shell 6, the first driving bevel gear 8 and the first driven bevel gear 9, the sun gear 10 and the planetary gear 11 are both arranged inside the upper shell 2, the outer wall of the upper shell 2 is fixedly connected with a plurality of fixed lifting lugs 3, the inner wall of the upper shell 2 is provided with a gear ring 12, the gear ring 12 is meshed with the planetary gear 11, the lower end of the central shaft 4 is provided with a second driving bevel gear 13, the second driving bevel gear 13 is meshed with a second driven bevel gear 14, and the second driven bevel gear 14 is sleeved on a connecting shaft at one end of the corresponding auger 7.
The relationship between the rotational speed of the sun gear 10, the rotational speed of the ring gear 12 and the rotational speed of the carrier according to the first formula is obtained:
the formula I is as follows: n isa+αnb-(1+α)nH=0;
In formula one, naThe rotational speed of the sun wheel 10, also the rotational speed of the central shaft 4, r/n;
nbthe rotational speed of the ring gear 12, r/n;
nH-the rotational speed of the planet carrier, r/n;
alpha is a structural parameter, and the calculation process of the structural parameter alpha is obtained according to a formula II:
the relationship between the number of teeth of the male gear 10 and the number of teeth of the ring gear 12 in the present invention is obtained according to the formula two:
the formula II is as follows:
Figure BDA0001738295310000071
z in formula IIaThe number of teeth of the sun gear 10,
Zbnumber of teeth of ring gear 12, because of Zb>ZaTherefore, α > 1.
A planetary mechanism composed of a central shaft 4, a sun gear 10, a planet carrier, a planetary gear 11 and a ring gear 12, wherein the sun gear 10 inputs, and the ring gear 12 fixes nbSince the carrier outputs 0, we find:
Figure BDA0001738295310000072
the rotating speed of the sun gear 10 is the same as that of the central shaft 4, the rotating speed of the planet carrier is the same as that of the lower shell 6, namely, the rotating speed of the central shaft 4 is greater than that of the lower shell 6, namely, the central shaft 4 has an operation rotating speed relative to the lower shell 6, the number of teeth of the second driving bevel gear 13 is greater than or equal to that of the driven bevel gear 14, the speed is further increased, the rotating effect that the plurality of packing augers 7 surround the central shaft 4 is realized, each packing auger 7 can rotate around the axis of the packing auger, the revolution and the rotation are realized, the land leveling efficiency is high, the land leveling effect is good, the abrasion of each packing auger 7.

Claims (10)

1. A planet structure land leveler is characterized in that: the planetary assembly comprises a power input shaft (1), an upper shell (2), a central shaft (4), a planet carrier, a lower shell (6), a planetary assembly and a plurality of packing augers (7), wherein the planetary assembly comprises a first driving bevel gear (8), a first driven bevel gear (9), a sun gear (10), a planetary gear (11) and a second driving bevel gear (13), the upper shell (2) is arranged above the lower shell (6), the central shaft (4) is vertically arranged between the upper shell (2) and the lower shell (6), the upper end of the central shaft (4) is arranged in the upper shell (2), the end of the central shaft is sleeved with the first driven bevel gear (9), one end of the power input shaft (1) penetrates through the outer wall of the upper shell (2) and is arranged in the upper shell (2), the first driving bevel gear (8) is arranged in the upper shell (2) and is sleeved on the power input shaft (1), first drive bevel gear (8) and first driven bevel gear (9) mesh mutually, sun gear (10) suit is on center pin (4), the planet carrier includes two piece at least support columns (5), the upper end of every support column (5) meshes with sun gear (10) through a planetary gear (11), every planetary gear (11) still meshes with the inner wall of last casing (2) mutually, the lower extreme fixed connection of every support column (5) is at the top of casing (6) down, the lower extreme setting of center pin (4) is in casing (6) down and this pot head is equipped with second drive bevel gear (13), a plurality of augers (7) equipartitions are around casing (6) down, the outer wall that the one end of every auger (7) passed casing (6) down meshes with second drive bevel gear (13) mutually.
2. A planetary structural grader according to claim 1 wherein: the inner wall of the upper shell (2) is processed with a gear ring (12) along the circumferential direction of the inner wall, the gear ring (12) comprises a plurality of internal teeth, and the internal teeth are meshed with the planetary gear (11).
3. A planetary structural grader according to claim 1 wherein: each packing auger (7) is correspondingly provided with a second driven bevel gear (14), each second driven bevel gear (14) is fixedly installed on the corresponding packing auger (7), each second driven bevel gear (14) is meshed with a second driving bevel gear (13), and the number of the packing augers (7) ranges from 4 to 8.
4. A planetary structural grader according to any of claims 1-3, wherein: the outer wall of the upper shell (2) is provided with at least two fixed lifting lugs (3).
5. A planetary structural grader according to claim 4 wherein: the upper casing (2) is cylindrical, the lower casing (6) comprises a supporting cylinder, an upper cover and a lower cover, the supporting cylinder is vertically arranged, the top end and the bottom end of the supporting cylinder are respectively provided with the upper cover and the lower cover, the upper cover is provided with a through hole matched with the central shaft (4), and the upper cover, the lower cover and the supporting cylinder are connected in a sealing mode.
6. A durable grader, comprising: the tractor comprises a tractor (15), a support frame (16), N motors (17) and N land levelers (18), wherein the support frame (16) is connected with the tractor (15), the N land levelers (18) are arranged on the support frame (16) in parallel, each land leveller (18) is correspondingly provided with one motor (17), each land leveller (18) comprises a power input shaft (1), an upper shell (2), a central shaft (4), a planet carrier, a lower shell (6), a planet assembly and a plurality of packing augers (7), the planet assembly comprises a first driving bevel gear (8), a first driven bevel gear (9), a sun gear (10), a planet gear (11) and a second driving bevel gear (13), the upper shell (2) is arranged above the lower shell (6), the central shaft (4) is vertically arranged between the upper shell (2) and the lower shell (6), the upper end of a central shaft (4) is arranged in an upper shell (2) and a first driven bevel gear (9) is sleeved at the end, one end of a power input shaft (1) penetrates through the outer wall of the upper shell (2) to be arranged in the upper shell (2), a first driving bevel gear (8) is arranged in the upper shell (2) and sleeved on the power input shaft (1), the first driving bevel gear (8) is meshed with the first driven bevel gear (9), the other end of the power input shaft (1) is connected with an output shaft of a corresponding motor (17), a sun gear (10) is sleeved on the central shaft (4), a planet carrier comprises at least two support columns (5), the upper end of each support column (5) is meshed with the sun gear (10) through a planetary gear (11), the lower end of each support column (5) is fixedly connected to the top of a lower shell (6), the lower end of the central shaft (4) is arranged in the lower shell (6) and a second driving bevel gear is sleeved at the end And the packing augers (7) are uniformly distributed around the lower shell (6), and one end of each packing auger (7) penetrates through the outer wall of the lower shell (6) and is meshed with the second driving bevel gear (13).
7. The durable grader of claim 6 wherein: each packing auger (7) is correspondingly provided with a second driven bevel gear (14), each second driven bevel gear (14) is fixedly arranged on the corresponding packing auger (7), and each second driven bevel gear (14) is meshed with the second driving bevel gear (13).
8. A durable grader according to claim 6 or 7 wherein: the outer wall of the upper shell (2) is provided with at least two fixed lifting lugs (3).
9. The durable grader according to claim 8, wherein: the upper casing (2) is cylindrical, the lower casing (6) comprises a supporting cylinder, an upper cover and a lower cover, the supporting cylinder is vertically arranged, the top end and the bottom end of the supporting cylinder are respectively provided with the upper cover and the lower cover, the upper cover is provided with a through hole matched with the central shaft (4), and the upper cover, the lower cover and the supporting cylinder are connected in a sealing mode.
10. The durable grader according to claim 9, wherein: the number of the packing augers (7) ranges from 4 to 8.
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