CN112849256A

CN112849256A - Steering mechanism of small agricultural crawler tractor

Info

Publication number: CN112849256A
Application number: CN202011632466.5A
Authority: CN
Inventors: 邓晓; 何康; 李小标
Original assignee: Suzhou University
Current assignee: Suzhou University
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-05-28

Abstract

The invention discloses a steering mechanism of a small agricultural crawler-type tractor, which comprises a tractor body, wherein the output end of a motor penetrates through supporting plates and is fixedly connected with a rotating structure, sliding structures are arranged on two supporting plates positioned in the middle, the front end and the rear end of each sliding structure are respectively and fixedly connected with rotating rods, one ends of the two rotating rods, far away from the sliding structures, are fixedly connected with damping structures, and the left part of the upper end of the tractor body is fixedly connected with a steering structure. The steering mechanism of the small agricultural crawler tractor improves the multidirectional rotation characteristic of the tractor during use, improves the reliability and the simplicity of the tractor main body, reduces the shock absorption of the tractor main body during steering or moving, improves the high-efficiency stability of the tractor during steering or moving, avoids the phenomenon of complex operation during steering, and also increases the convenience of maintenance or overhaul of the steering structure during use.

Description

Steering mechanism of small agricultural crawler tractor

Technical Field

The invention relates to the technical field of belt tractors, in particular to a steering mechanism of a small agricultural crawler tractor.

Background

The crawler tractor is also called a caterpillar tractor or a belt tractor, and is one kind of tractor. The running gear is composed of a guide wheel, a follow-up wheel, a thrust wheel, a driving wheel and a belt. When the tractor is operated, the driving wheel winds the belt to do circular motion, and the thrust wheel rolls on the track of the belt to move forwards or backwards, so that the flexibility and the stability of the tractor body in the moving process are reduced, the multi-direction and multi-direction rotation characteristics of the tractor when the tractor is used are reduced, and the reliability and the simplicity of the use of the tractor body are reduced; 2. when the existing tractor steering structure is used, the vibration performance of the tractor main body is easy to occur when the roller moves or jolts, the vibration absorption performance of the tractor main body in the steering or moving process is increased, the high-efficiency stability of the tractor in the steering or moving process is reduced, the manufacturing cost is improved, the space volume occupied by the control system of the power machine is improved, and the requirements of miniaturization and convenience in use of equipment for meeting the operation of a specific farmland are reduced; 3. when the existing tractor steering structure is used, the stability of steering of the tractor is reduced, the flexibility and the stability of the tractor during steering are improved and reduced, and the phenomenon of complex operation during steering is easy to occur, so that the steering mechanism of the small agricultural crawler tractor is provided.

Disclosure of Invention

The invention mainly aims to provide a steering mechanism of a small agricultural crawler tractor, which can effectively solve the problems in the background technology.

In order to achieve the purpose, the invention adopts the technical scheme that:

a steering mechanism of a small-sized agricultural crawler tractor comprises a tractor body, wherein four supporting plates are fixedly connected to the right part of the upper end of the tractor body, a motor is fixedly connected to the right end of the supporting plate positioned at the right part, the output end of the motor penetrates through the supporting plates and is fixedly connected with a rotating structure, sliding structures are arranged on two supporting plates positioned at the middle part, rotating rods are respectively and fixedly connected to the front end and the rear end of each sliding structure, one ends of the two rotating rods, far away from the sliding structures, are respectively and fixedly connected with a damping structure, five rolling shafts are respectively arranged on the two damping structures, belts are sleeved on the outer surfaces of the five rolling shafts together, supporting rods are respectively and fixedly connected to the outer surfaces of the five rolling shafts, one ends of the supporting rods, far away from the two rolling shafts, are respectively and fixedly connected with rolling wheels, and a plurality, the anti-skid belt is arranged in the two belts respectively, the left part of the upper end of the tractor body is fixedly connected with a steering structure, and the upper end of the steering structure is fixedly connected with a steering handle.

Preferably, revolution mechanic includes the connecting rod No. one, the left end fixedly connected with roller pipe No. one of a connecting rod, No. two roller pipes of left end middle part fixedly connected with of roller pipe, a fixed surface of roller pipe is connected with a plurality of evenly distributed's gear, the fixed surface of roller pipe is connected with a plurality of evenly distributed's gear No. two.

Preferably, sliding structure includes the connecting rod No. two, No. two the connecting rod is provided with two, two No. two the equal fixedly connected with third roller pipe of opposite face of No. two the equal fixedly connected with fourth roller pipe in opposite face middle part of No. three roller pipes, two the equal fixedly connected with a plurality of evenly distributed's of surface third gear of No. three roller pipe, two the equal fixedly connected with a plurality of evenly distributed's of surface fourth roller pipe's No. four gears.

Preferably, the right-hand member of a connecting rod and the output fixed connection of motor, a plurality of No. one gear and No. two gears of a plurality of are all contactless, a plurality of the front end and the rear end of a gear are connected with two No. three gear engagement respectively, a plurality of the front end and the rear end of No. two gears are connected with two No. four gear engagement respectively.

Preferably, the two second connecting rods are fixedly connected with the two rotating rods respectively, and the two second connecting rods are penetrated through and movably connected with the two supporting plates in the middle respectively.

Preferably, the upper end left side middle part of tractor main part is opened there is the connecting hole, the right-hand member upper portion of tractor main part is opened there is the spread groove, the upper end right part of tractor main part is opened there are a spout and No. two spouts, a spout communicates with each other from No. two spout insides.

Preferably, shock-absorbing structure includes a slide bar, No. two slide bars and No. three slide bars, a slide bar is provided with two, two the equal fixedly connected with spring in lower extreme left part of a slide bar, two the lower extreme right part of a slide bar, the lower extreme of two springs, the lower extreme left part and the lower extreme right part of No. two slide bars and the equal fixedly connected with connecting pipe in lower extreme left part and the lower extreme right part of No. three slide bars.

Preferably, the two first sliding rods are movably connected with the four rolling shafts through connecting pipes respectively, the second sliding rod and the third sliding rod are movably connected with the three rolling shafts through connecting pipes respectively, and the first sliding rod, the second sliding rod and the third sliding rod are distributed in a staggered mode.

Preferably, the steering structure comprises a supporting pipe, the upper end of the supporting pipe is movably connected with a turntable, the outer surface lower part of the turntable is fixedly connected with two sliding plates, a first clamping plate is fixedly connected with the left ends of the two sliding plates, a second clamping plate is fixedly connected with two first clamping columns and two second clamping columns, the first clamping plate is far away from the two sliding plates, the right ends of the two sliding plates are fixedly connected with a second clamping plate, the second clamping plate is far away from a third clamping plate and a third clamping plate which are fixedly connected with the middle part of the one end of the connecting sliding plate, and the second clamping plate is far away from the two second clamping columns which are fixedly connected with the.

Preferably, the supporting pipe is located in the connecting hole and is fixedly connected with the tractor body, and the positions of the first clamping plate and the second clamping plate correspond to the positions of the four rollers located on the left portion respectively.

Compared with the prior art, the invention has the following beneficial effects:

1. in the invention, a rotating structure and a sliding structure are connected on a tractor body, a first roller pipe and a second roller pipe are connected on a first connecting rod on the rotating structure, a first gear and a second gear are respectively connected on the first roller pipe and the second roller pipe, a third roller pipe and a fourth roller pipe are connected on a second connecting rod on the sliding structure, a third gear and a fourth gear are respectively connected on the third roller pipe and the fourth roller pipe, when the tractor body is used, the first connecting rod is controlled by a motor to rotate the first gear and the second gear to be respectively meshed with the third gear and the fourth gear, the third gear and the fourth gear rotate in a first sliding groove while the first gear and the second gear rotate in a second sliding groove so as to drive the second connecting rod to rotate, so that a roller connected with the other end of the second connecting rod is driven to rotate so as to drive a belt to rotate, the flexibility and the stability of the tractor body in the moving process are increased, the multidirectional and multidirectional rotating characteristics of the tractor during use are improved, and the reliability and the simplicity of the tractor body are improved.

2. In the invention, the damping structure is connected on the tractor main body, and the first slide bar, the second slide bar and the third slide bar on the damping structure are connected with the connecting pipe, a spring is arranged on the first slide bar, and is movably connected with the roller through a rolling shaft by the first slide bar, the second slide bar and the third slide bar, when the gyro wheel meets the highway section of height not smooth, change the height angle that the gyro wheel removed through the slide bar, to the vibrations nature of tractor main part when turning to in-process spring can effectively reduce the gyro wheel and remove or jolt, the shock attenuation nature of tractor main part in turning to or removing the in-process has been reduced, high-efficient stationarity when having improved the tractor when turning to or when removing, reduce the cost of manufacture, the shared space volume of power machinery's control system has been reduced, make its convenient operation of being applied to narrow and small space, can use and narrow and small space operation, miniaturized and the demand that is used for satisfying specific farmland operation of convenience when having increased equipment usage.

3. In the invention, a steering structure is connected on a tractor main body, a rotary table is connected on a supporting tube on the steering structure, a sliding plate is connected on the rotary table, a first clamping plate and a first clamping column are connected on the sliding plate, a third clamping plate and a second clamping column are connected on the second clamping plate, when the tractor main body is steered by a rotating handle, the rotating handle is manually controlled remotely to drive the rotary table to rotate left and right, so that the sliding plate drives the first clamping plate and the second clamping plate to move towards supporting rods connected on a rolling shaft respectively, the first clamping column and the second clamping column are respectively clamped on the supporting rods at the front and rear positions, the steering control distance of the tractor is effectively reduced, the supporting rods are respectively clamped in opposite directions by the clamping columns, a motor drives the first connecting rod to rotate so as to drive the second connecting rod to continue to rotate, the steering stability of the tractor is increased, and the clamping columns and the clamping plates are returned to, flexibility and stability when having increased the tractor and turning to avoid turning to the phenomenon of operation complicacy, also increased simultaneously and turned to the structure maintenance or the convenience of overhauing when using.

Drawings

FIG. 1 is a schematic view of the overall structure of a steering mechanism of a small agricultural track-type tractor according to the invention;

FIG. 2 is a schematic view showing a sliding state of a steering mechanism of a small agricultural crawler tractor according to the present invention;

FIG. 3 is a schematic connection diagram of a rotating structure and a sliding structure of a steering mechanism of a small agricultural crawler tractor according to the present invention;

FIG. 4 is a schematic structural view of a tractor body of a steering mechanism of a small agricultural track-type tractor according to the present invention;

FIG. 5 is a schematic structural view of a shock-absorbing structure of a steering mechanism of a small agricultural crawler tractor according to the present invention;

FIG. 6 is a schematic structural view of a steering structure of a steering mechanism of a small agricultural track-type tractor according to the invention;

fig. 7 is a schematic connection diagram of a tractor body of a steering mechanism of a small agricultural track-type tractor according to the present invention.

In the figure: 1. a tractor body; 2. a support plate; 3. a motor; 4. a rotating structure; 5. a sliding structure; 6. a rotating rod; 7. a roller; 8. a support bar; 9. a roller; 10. an anti-slip band; 11. a shock-absorbing structure; 12. a steering structure; 13. turning a handle; 14. a belt; 41. a first connecting rod; 42. a first roller tube; 43. a second roller tube; 44. a first gear; 45. a second gear; 51. a second connecting rod; 52. a third roller tube; 53. a fourth roller tube; 54. a third gear; 55. a fourth gear; 101. connecting holes; 102. connecting grooves; 103. a first chute; 104. a second chute; 111. a first sliding rod; 112. a second sliding rod; 113. a third sliding rod; 114. a spring; 115. a connecting pipe; 121. supporting a tube; 122. a turntable; 123. a slide plate; 124. a first card board; 125. a first clamp column; 126. a second card board; 127. a third card board; 128. and a second clamping column.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1-7, a steering mechanism of a small-sized agricultural crawler tractor comprises a tractor body 1, four support plates 2 are fixedly connected to the right part of the upper end of the tractor body 1, a motor 3 is fixedly connected to the right end of the support plate 2 positioned at the right part, the output end of the motor 3 penetrates through the support plates 2 and is fixedly connected with a rotating structure 4, a sliding structure 5 is arranged on two support plates 2 positioned at the middle part, the front end and the rear end of the sliding structure 5 are respectively and fixedly connected with a rotating rod 6, the ends of the two rotating rods 6 far away from the sliding structure 5 are respectively and fixedly connected with a damping structure 11, five rolling shafts 7 are respectively arranged on the two damping structures 11, belts 14 are sleeved on the outer surfaces of the five rolling shafts 7 together, support rods 8 are respectively and fixedly connected to the outer surfaces of the five rolling shafts 7, and, the outer surface of the plurality of idler wheels 9 is fixedly connected with a plurality of evenly distributed anti-skid belts 10, the plurality of anti-skid belts 10 are respectively positioned in the two belts 14, the upper left part of the upper end of the tractor body 1 is fixedly connected with a steering structure 12, and the upper end of the steering structure 12 is fixedly connected with a steering handle 13.

The rotating structure 4 comprises a first connecting rod 41, a first roller tube 42 is fixedly connected at the left end of the first connecting rod 41, a second roller tube 43 is fixedly connected at the middle part of the left end of the first roller tube 42, a plurality of uniformly distributed first gears 44 are fixedly connected on the outer surface of the first roller tube 42, a plurality of uniformly distributed second gears 45 are fixedly connected on the outer surface of the second roller tube 43, when the tractor body 1 is used, the first connecting rod 41 is controlled by the motor 3 to rotate the first gear 44 and the second gear 45 to be respectively meshed with the third gear 54 and the fourth gear 55, while the first gear 44 and the second gear 45 rotate in the second sliding groove 104, the third gear 54 and the fourth gear 55 rotate in the first sliding groove 103 to drive the second connecting rod 51 to rotate, thereby driving the roller 9 connected with the other end of the second connecting rod 51 to rotate so as to drive the belt 14 to rotate, and increasing the flexibility and stability of the tractor body 1 in the moving process.

Sliding structure 5 includes connecting rod 51 No. two, connecting rod 51 No. two is provided with two, the equal fixedly connected with third roller pipe 52 of the opposite face of two connecting rod 51, the equal fixedly connected with fourth roller pipe 53 in the opposite face middle part of two third roller pipe 52, the equal fixedly connected with a plurality of evenly distributed's of surface third gear 54 of two third roller pipe 52, the equal fixedly connected with a plurality of evenly distributed's of surface fourth gear 55 of two fourth roller pipe 53, thereby gyro wheel 9 that the connecting rod 51 other end is connected rotates and drives belt 14 and rotate, thereby the flexibility and the stability of tractor main part 1 removal in-process have been increased, multidirectional diversified pivoted characteristics when having improved the tractor and using.

The right-hand member of connecting rod 41 and motor 3's output fixed connection, a plurality of gear 44 and a plurality of No. two gears 45 all contactless, a plurality of gear 44's front end and rear end are connected with two No. three gears 54 meshing respectively, a plurality of No. two gears 45's front end and rear end are connected with two No. four gears 55 meshing respectively, multidirectional diversified pivoted characteristics when having improved the tractor and using have improved reliability and the simplicity that tractor main part 1 used.

Two No. two connecting rods 51 respectively with two bull sticks 6 fixed connection, two No. two connecting rods 51 run through and swing joint with two backup pad 2 that are located the middle part respectively, two No. two connecting rods 51 run through the connecting pipe 115 and directly are connected with roller bearing 7 and drive roller bearing 7 and rotate, have improved reliability and the simplicity that tractor main part 1 used.

Connecting hole 101 is opened at the upper end left side middle part of tractor main part 1, and open on the right-hand member upper portion of tractor main part 1 has spread groove 102, and open on the upper end right part of tractor main part 1 has a spout 103 and No. two spouts 104, and a spout communicates with each other from 103 and No. two spouts 104 are inside, avoids the gear to cause the wearing and tearing condition to the machine inner wall when rotating, increases machine pivoted stability and flexibility.

Shock-absorbing structure 11 includes slide bar 111, No. two slide bars 112 and No. three slide bars 113, slide bar 111 is provided with two, the equal fixedly connected with spring 114 in lower extreme left part of two slide bars 111, the lower extreme right part of two slide bars 111, the lower extreme of two springs 114, the equal fixedly connected with connecting pipe 115 in lower extreme left part and the lower extreme right part of No. two slide bars 112 and the lower extreme left part and the lower extreme right part of No. three slide bars 113, when gyro wheel 9 meets the highway section of height unevenness, change the height angle that gyro wheel 9 removed through the slide bar, to tractor main part 1 when turning to in-process spring 114 can effectively reduce gyro wheel 9 and remove or jolt the vibrations nature, the tractor main part 1 has been reduced and has turned to or has removed the in-process shock attenuation, the efficient stationarity when having improved the tractor when turning to or when removing.

Two slide bars 111 pass through connecting pipe 115 respectively with four roller bearing 7 swing joint, No. two slide bars 112 and No. three slide bars 113 pass through connecting pipe 115 and three roller bearing 7 swing joint respectively, slide bar 111, No. two slide bars 112 and No. three slide bars 113 crisscross distribution, reduce the cost of manufacture, the shared space volume of power machinery's control system has been reduced, make its convenient operation of being applied to narrow and small space, can use with narrow and small space operation, miniaturized and convenient when having increased equipment and having used for satisfying the demand of specific farmland operation.

The steering structure 12 comprises a supporting pipe 121, a rotary table 122 is movably connected to the upper end of the supporting pipe 121, two sliding plates 123 are fixedly connected to the lower portion of the outer surface of the rotary table 122, first clamping plates 124 are fixedly connected to the left ends of the two sliding plates 123, two first clamping columns 125 are fixedly connected to the ends, away from the two sliding plates 123, of the two first clamping plates 124, second clamping plates 126 are fixedly connected to the right ends of the two sliding plates 123, third clamping plates 127 are fixedly connected to the middle portions, away from the connecting sliding plates 123, of the two second clamping plates 126, two second clamping columns 128 are fixedly connected to the ends, away from the sliding plates 123, of the two second clamping plates 126, when the tractor body 1 is steered through a rotating handle 13, the rotating handle 13 is manually controlled to rotate left and right, the rotary table 122 is driven by the sliding plates 123 to drive the first clamping plates 124 and the second clamping plates 126 to respectively move towards the supporting rods 8 connected to the rolling shafts 7, the first, effectively reduce the distance of controlling that the tractor turned to, the card post blocks bracing piece 8 to opposite direction respectively, thereby motor 3 drives a connecting rod 41 and rotates and drive No. two connecting rods 51 and continue to rotate, has increased the stability that the tractor turned to.

The supporting pipe 121 is located in the connecting hole 101 and fixedly connected with the tractor body 1, the positions of the two first clamping plates 124 and the two second clamping plates 126 correspond to the positions of the four rollers 9 located on the left portion respectively, after steering, the clamping columns and the clamping plates are classified into normal driving through the steering handle 13, flexibility and stability of the tractor during steering are improved, the phenomenon of complex operation during steering is avoided, and meanwhile, the convenience of maintenance or overhaul during use of the steering structure 12 is also improved.

It should be noted that, the steering mechanism of the crawler tractor of the invention, when the tractor body 1 is used to steer by the steering handle 13, the steering handle 13 is manually controlled to rotate left and right, so that the slide plate 123 drives the first card plate 124 and the second card plate 126 to move towards the support rod 8 connected to the roller 7, the first card column 125 and the second card column 128 respectively block the support rod 8 at the front and back positions, the control distance of the tractor steering is effectively reduced, the support rod 8 is respectively blocked by the card columns in opposite directions, the motor 3 drives the first connecting rod 41 to rotate so as to drive the second connecting rod 51 to continue rotating, the steering stability of the tractor is increased, the card columns and the card plates are returned to normal running by the steering handle 13 after steering, the flexibility and the stability of the tractor during steering are increased, the phenomenon of complex operation during steering is avoided, and the convenience of maintenance or overhaul during the use of the steering structure 12 is also increased, a first roller tube 42 and a second roller tube 43 are connected to a first connecting rod 41 on a rotating structure 4, a first gear 44 and a second gear 45 are connected to the first roller tube 42 and the second roller tube 43 respectively, a third roller tube 52 and a fourth roller tube 53 are connected to a second connecting rod 51 on a sliding structure 5, a third gear 54 and a fourth gear 55 are connected to the third roller tube 52 and the fourth roller tube 53 respectively, when the tractor body 1 is used, the first connecting rod 41 is controlled by a motor 3 to rotate the first gear 44 and the second gear 45 to be meshed with the third gear 54 and the fourth gear 55 respectively, the first gear 44 and the second gear 45 rotate in a second sliding groove 104, the third gear 54 and the fourth gear 55 rotate in the first sliding groove 103 to drive a second connecting rod 51 to rotate, and a roller 9 connected to the other end of the second connecting rod 51 is driven to rotate so as to drive a belt 14 to rotate, the flexibility and the stability of the tractor body 1 in the moving process are increased, the multidirectional rotation characteristic of the tractor in the use process is improved, the reliability and the simplicity of the use of the tractor body 1 are improved, the first sliding rod, the second sliding rod 112 and the third sliding rod 113 on the damping structure 11 are connected with the connecting pipe 115, the first sliding rod 111 is provided with the spring 114, the first sliding rod 111, the second sliding rod 112 and the third sliding rod 113 are movably connected with the roller 9 through the roller 7, when the roller 9 meets a rugged road section, the height angle of the roller 9 in the moving process is changed through the sliding rods, the spring 114 can effectively reduce the vibration of the roller 9 to the tractor body 1 when the roller 9 moves or jolts in the steering process, the damping performance of the tractor body 1 in the steering or moving process is reduced, the high-efficiency smoothness of the tractor in the steering process or the moving process is improved, and the manufacturing cost is reduced, the shared space volume of the control system of the power machine is reduced, the power machine is convenient and fast to apply to operation in narrow and small space, operation in narrow and small space can be applied, the requirements of miniaturization and convenience for meeting specific farmland operation when equipment is used are increased, the efficiency is high, the reliability is high, and the popularization and the use can be realized.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a steering mechanism of small-size agricultural track-mounted tractor, includes tractor main part (1), its characterized in that: the tractor is characterized in that four supporting plates (2) are fixedly connected to the right part of the upper end of a tractor body (1), a motor (3) is fixedly connected to the right end of the supporting plate (2) positioned on the right part, the output end of the motor (3) penetrates through the supporting plate (2) and is fixedly connected with a rotating structure (4), two supporting plates (2) positioned in the middle part are provided with sliding structures (5), the front end and the rear end of each sliding structure (5) are respectively and fixedly connected with rotating rods (6), one ends, far away from the sliding structures (5), of the two rotating rods (6) are respectively and fixedly connected with damping structures (11), two damping structures (11) are respectively provided with five rolling shafts (7), the outer surfaces of the five rolling shafts (7) are jointly sleeved with belts (14), the outer surfaces of the five rolling shafts (7) are respectively and fixedly connected with supporting rods (8), and a plurality of the supporting rods (8) are respectively and fixedly connected with idler, the outer surface of the roller (9) is fixedly connected with a plurality of anti-skid belts (10) which are uniformly distributed, the anti-skid belts (10) are respectively positioned in two belts (14), the upper left part of the tractor body (1) is fixedly connected with a steering structure (12), and the upper end of the steering structure (12) is fixedly connected with a rotating handle (13).

2. A steering mechanism for a small agricultural track-type tractor according to claim 1, wherein: revolution mechanic (4) are including connecting rod (41) No. one, roller pipe (42) No. one of left end fixedly connected with of connecting rod (41), roller pipe (43) No. two of left end middle part fixedly connected with of roller pipe (42), gear (44) of a plurality of evenly distributed of the outer fixed surface of roller pipe (42), gear (45) of a plurality of evenly distributed of the outer fixed surface of roller pipe (43) No. two.

3. A steering mechanism for a small agricultural track-type tractor according to claim 1, wherein: sliding structure (5) are including No. two connecting rods (51), No. two connecting rods (51) are provided with two, two No. two roller pipe (52) No. three of the equal fixedly connected with in opposite face of connecting rod (51), two roller pipe (53) No. four of the equal fixedly connected with in opposite face middle part of No. three roller pipe (52), two No. three gear (54) of the equal fixedly connected with a plurality of evenly distributed of surface of roller pipe (52), two No. four gear (55) of the equal fixedly connected with a plurality of evenly distributed of surface of roller pipe (53) No. four.

4. A steering mechanism for a small agricultural track-type tractor according to claim 2, wherein: the right-hand member of a connecting rod (41) and the output fixed connection of motor (3), a plurality of gear (44) and a plurality of No. two gear (45) all contactless, a plurality of the front end and the rear end of gear (44) are connected with two No. three gears (54) meshing respectively, a plurality of the front end and the rear end of No. two gear (45) are connected with two No. four gears (55) meshing respectively.

5. A steering mechanism for a small agricultural track-type tractor according to claim 3, wherein: two No. two connecting rod (51) respectively with two bull stick (6) fixed connection, two No. two connecting rod (51) run through and swing joint with two backup pad (2) that are located the middle part respectively.

6. A steering mechanism for a small agricultural track-type tractor according to claim 1, wherein: connecting hole (101) have been opened at the upper end left side middle part of tractor main part (1), open on the right-hand member upper portion of tractor main part (1) has spread groove (102), open the upper end right part of tractor main part (1) has a spout (103) and No. two spout (104), the spout communicates with each other from (103) and No. two spout (104) inside.

7. A steering mechanism for a small agricultural track-type tractor according to claim 1, wherein: shock-absorbing structure (11) are including a slide bar (111), No. two slide bars (112) and No. three slide bars (113), slide bar (111) is provided with two, two the equal fixedly connected with spring (114) in lower extreme left part of slide bar (111), two the lower extreme right part of slide bar (111), the lower extreme left part and the lower extreme right part of two springs (114), No. two slide bars (112) and the equal fixedly connected with connecting pipe (115) in lower extreme left part and the lower extreme right part of No. three slide bars (113).

8. A steering mechanism for a small agricultural track-type tractor according to claim 7, wherein: the two first sliding rods (111) are movably connected with the four rollers (7) through connecting pipes (115), the second sliding rod (112) and the third sliding rod (113) are movably connected with the three rollers (7) through the connecting pipes (115), and the first sliding rods (111), the second sliding rods (112) and the third sliding rods (113) are distributed in a staggered mode.

9. A steering mechanism for a small agricultural track-type tractor according to claim 1, wherein: the steering structure (12) comprises a supporting pipe (121), a turntable (122) is movably connected to the upper end of the supporting pipe (121), two sliding plates (123) are fixedly connected to the lower portion of the outer surface of the turntable (122), a first clamping plate (124) is fixedly connected to the left ends of the two sliding plates (123), two first clamping plates (125) are fixedly connected to the ends, away from the two sliding plates (123), of the first clamping plates (124), two clamping plates (126) are fixedly connected to the right ends of the two sliding plates (123), two clamping plates (127) are fixedly connected to the middle portion of one end, away from the connecting sliding plates (123), of the second clamping plates (126), and two clamping columns (128) are fixedly connected to the ends, away from the sliding plates (123), of the second clamping plates (126).

10. A steering mechanism for a small agricultural track-type tractor according to claim 9, wherein: the supporting pipe (121) is located in the connecting hole (101) and fixedly connected with the tractor body (1), and the positions of the first clamping plate (124) and the second clamping plate (126) correspond to the positions of the four rollers (9) located on the left portion respectively.