CN214689798U - Tractor capable of driving in two directions and hitching and pushing agricultural implements - Google Patents

Abstract

The utility model relates to a bidirectional driving tractor capable of hitching and pushing agricultural implements, belonging to the technical field of agricultural mechanical structures. The hydraulic multi-way valve is characterized by comprising a power driving mechanism and a rotary driving platform, wherein a hydraulic multi-way valve is installed nearby the rotary driving platform, one way of the hydraulic multi-way valve is in power connection with a lifting oil cylinder, the lifting oil cylinder is used for driving a lower pull rod of a lifter to lift, the hydraulic multi-way valve is also connected with sockets of a plurality of hydraulic quick connectors through a plurality of high-pressure oil pipes, and the sockets of the hydraulic quick connectors are connected with plugs of quick connectors of articulated agricultural implements. The utility model discloses but to current middle-size and small-size four-wheel tractor driving system improve into two-way driving, can not only realize that the tractor also can articulate promotion class agricultural implement and accomplish the operation, but also has addd the tractor that is fit for modern farming's high efficiency that all need not long distance back a car under any circumstance, and the important function of the safety of the line of sight is not kept off when transporting big object with the fork, this tractor simple structure, the flexible operation is convenient.

Description

Tractor capable of driving in two directions and hitching and pushing agricultural implements

Technical Field

The utility model relates to a bidirectional driving tractor capable of hitching and pushing agricultural implements, belonging to the technical field of agricultural mechanical structures.

Background

The agricultural small and medium four-wheel tractor is the agricultural machinery power source with the most extensive agricultural mechanization application and the highest use frequency, more than 60% of agricultural machines belonging to the 'dragging and pulling' property can be hung on the rear suspension to utilize the rear output power to complete the operation, but the small and medium tractors except a larger electric control program control or double-set driving system can only drive in one direction, so that the agricultural small and medium four-wheel tractor has the following advantages: agricultural machines for harvesting, forking, shoveling, etc. cannot realize hitching operation, so the agricultural activities of the type can be completed only by special machines with power, such as special harvesting equipment of wheat, corn, sugarcane, pasture grass, etc., and special shipping equipment of cross-country fork trucks, loading forklifts, etc. The special equipment has the biggest defects of low utilization rate, serious use for ten days and half months every year and no more than a plurality of specialized mechanical teams due to strong seasonality due to limited seasons of agricultural activities, so that the rural areas in China are hard to bear under the existing conditions and the progress of agricultural mechanization is seriously influenced and promoted. The small and medium-sized tractors cannot drive bidirectionally and simultaneously hitch and push the similar farm implements, which is a defect that the small and medium-sized tractors are in a state of saturation and excess capacity of the market but the mechanization degree of rural areas is not high in practice. There are few bidirectional driving technical products, which should be slow to popularize and apply due to complex system or inconvenient performance/price ratio and operation.

SUMMERY OF THE UTILITY MODEL

The utility model discloses but to current middle-size and small-size four-wheel tractor driving system improve into two-way driving, can not only realize that the tractor also can articulate promotion class agricultural implement and accomplish the operation, but also has addd the tractor that is fit for modern farming's high efficiency that all need not long distance back a car under any circumstance, and the important function of the safety of the line of sight is not kept off when transporting big object with the fork, this tractor simple structure, the flexible operation is convenient.

A tractor capable of being driven in two directions and being hung with pushing type agricultural implements is characterized by comprising a power driving mechanism and a rotary driving platform which are arranged on a tractor frame body, wherein a hydraulic multi-way valve which is powered by the power driving mechanism is arranged near the rotary driving platform, one way of the hydraulic multi-way valve is in power connection with a lifting oil cylinder at the rear of the tractor frame body through a high-pressure oil pipe, the lifting oil cylinder is used for driving a lower pull rod of a lifter to lift, one end of an upper pull rod and one end of the lower pull rod of the lifter are hinged on the multi-way tractor frame body, the hydraulic multi-way valve is also connected with sockets of a plurality of hydraulic quick connectors through a plurality of high-pressure oil pipes, the sockets of the hydraulic quick connectors are connected with plugs of the quick connectors of the hooked agricultural implements, and after the sockets of the hydraulic quick connectors are connected with the plugs of the hydraulic quick connectors, the power of a tractor transmission case can be transmitted to the hooked agricultural implements;

preferably, the bottom of the tractor frame body is provided with two front wheels and two rear wheels, the power driving mechanism comprises an engine, a transmission case and a gearbox, and the transmission case power drives the hydraulic pump to provide power for the hydraulic multi-way valve;

preferably, a power output shaft powered by a power driving mechanism is further mounted at the rear of the tractor frame body, and the power output shaft is in butt joint with a power input end of an agricultural implement through a transmission shaft;

preferably, an external suspension gear box, a gear shift lever, an auxiliary gear shift operating lever, a differential lock operating lever, a parking brake handle and a power output separating lever are arranged between the rotary driving platform and one of the rear wheels, and a transfer case operating lever is arranged between the rotary driving platform and the other rear wheel;

preferably, the rotary driving platform comprises a driving platform shell, a seat, an instrument desk, a rotary switch, an accelerator pedal and a connecting upright post which can synchronously rotate along with the driving platform shell are arranged in the driving platform shell, and a hydraulic power steering mechanism, a brake pedal mechanism and a clutch pedal mechanism which are used for realizing left-right turning of the tractor are arranged on the connecting upright post;

preferably, the hydraulic power steering mechanism comprises a steering hydraulic reversing valve arranged on a base of the driving platform, a hydraulic steering gear is arranged on the connecting upright post, a transmission box transmits power to the hydraulic steering gear through a constant flow pump, the hydraulic steering gear is connected with the steering hydraulic reversing valve, the steering hydraulic reversing valve is connected with a front wheel steering oil cylinder, and the front wheel steering oil cylinder is hinged with a front wheel steering vertical arm so as to drive the front wheel to rotate leftwards or rightwards;

preferably, the brake pedal mechanism comprises a brake pedal welding piece hinged on the connecting upright post, one end of the brake pedal welding piece is connected with a master cylinder, the master cylinder is connected with a brake cylinder through an oil pipe, and the brake cylinder is connected with the brake; the clutch pedal mechanism comprises a clutch pedal welding part, one end of the clutch pedal welding part is connected with a clutch master cylinder, the clutch master cylinder is connected with a clutch slave cylinder through an oil pipe, and the clutch slave cylinder is connected with a clutch;

preferably, a hydraulic rotary joint is installed at the bottom of the cab shell, the base end of the hydraulic rotary joint is fixed on a tractor frame body to replace a central shaft, the rotary head end is connected to the center of a rotary fluted disc to replace a central shaft sleeve, so that the dual functions of slewing bearing of the cab and avoiding winding of a high-pressure pipeline during slewing are realized, the hydraulic rotary joint comprises a hydraulic rotary joint base, the bottom of which is installed on the tractor frame body, a hydraulic rotary joint rotary head is installed on the hydraulic rotary joint base and is linked with the rotary fluted disc, the rotary fluted disc is meshed with a rotary gear, the rotary gear is controlled by a rotary motor, the rotary motor is controlled by a rotary switch, the rotary switch is controlled to drive the rotary motor after being electrified, the rotary motor drives the rotary fluted disc to rotate through rotary gear rotation meshing, the rotary fluted disc is positioned above the cab base, and rollers are installed on the upper surface of the cab base, a positioning reversing mechanism for limiting the rotary fluted disc is arranged between the rotary fluted disc and the base of the driving platform;

preferably, the positioning reversing mechanism comprises a positioning plate arranged on the edge of a rotary fluted disc, a backward positioning travel switch and a steering hydraulic reversing travel switch are arranged at the corresponding position of the driving platform base in parallel, the steering hydraulic reversing travel switch is connected with a steering hydraulic reversing valve, a forward positioning travel switch is arranged at the position, right opposite to the backward positioning travel switch, on the driving platform base, when the rotary fluted disc and the rotary driving platform are operated to rotate from the forward position to the backward position, the backward positioning travel switch is toggled by the positioning plate to stop rotating to realize backward positioning, meanwhile, the steering hydraulic reversing travel switches arranged in parallel are also toggled, the steering hydraulic reversing travel switch is electrically driven to work to realize that the power steering wheel acts at the back and the steering wheel operates in the same direction, or when the reverse operation rotary fluted disc and the rotary driving platform rotate forwards, the forward positioning travel switch is toggled by the positioning plate to stop rotating to realize that the forward positioning travel switch stops rotating forwards And the positioning plate is positioned, the positioning plate is also separated from the steering hydraulic reversing travel switch to be powered off, and the steering hydraulic reversing valve is restored to the original forward position state after being powered off, so that the action of the power steering wheel in the front is consistent with the operation direction of the steering wheel, and the rotary driving platform can realize the repeated positioning and reversing, and the action of the power steering wheel after reversing is consistent with the operation direction of the steering wheel all the time.

Compared with the prior art, the beneficial effects of the utility model are that: the tractor is formed by modifying the original traditional tractor, has simple structure and flexible and convenient operation, can be driven in both front and back directions, can also be used for hooking and pushing agricultural implements under the condition of not reducing the original functions, for example, can hook various harvesting equipment, forking equipment, shoveling equipment and the like, can also finish the harvesting of crops, pastures and the like on the premise of not crushing the crops when hooking the harvesting equipment, and avoids the repeated investment and the long-term idle defects of the traditional special equipment; when the fork loading and transporting equipment is articulated, the visual and alignment, safety and high efficiency can be realized when the fork is used for loading and transporting goods, the fork can also be used for forking the goods and then rotating and walking, so that the light and large goods of crops can be prevented from blocking the sight, the orchard driving is also convenient, the high-efficiency agriculture, fruit trees and vineyards are arranged in rows at present, the distance is very long, the yield is very high, and the transportation is the work which most causes the headache of fruit growers when the crops are harvested and picked; when the shoveling and transporting equipment is articulated, the self-loading and unloading functions of crops can be realized, the front shoveling and goods viewing and operation are accurate, and the people can safely walk without blocking the sight when carrying the shoveling and transporting equipment.

Drawings

FIG. 1 is a schematic structural view of a tractor which is driven in two directions and can be used for hitching and pushing a farm implement;

FIG. 2 is a schematic structural view of a swing deck;

FIG. 3 is a schematic structural view of a base of the driving cab;

FIG. 4 is a schematic structural view of the rotary driving cab of the present invention with the casing removed;

FIG. 5 is a block diagram of the transmission case, a steering mechanism and a hydraulic multi-way valve;

FIG. 6 is a block diagram of a brake pedal mechanism;

fig. 7 is a block diagram of the structure of the clutch pedal mechanism.

In the figure: 1. a rotary driving platform; 2. a hydraulic swivel joint; 3. a hydraulic swivel base; 4. turning a hydraulic rotary joint; 5. a rotary fluted disc; 6. a rotary gear; 7. a rotary motor; 8. a driver's seat; 9. a driver's seat housing; 10. an instrument desk; 11. a rotary switch; 12. connecting the upright columns; 13. a steering wheel; 15. A hydraulic multi-way valve; 16. an engine; 17. a transmission case; 18. a gearbox; 19. a hydraulic pump; 20. lifting the oil cylinder; 21. a socket of the hydraulic quick coupler; 22. a lower pull rod; 23. an upper pull rod; 25. A steering hydraulic directional valve; 26. a constant flow pump; 27. a hydraulic steering gear; 28. a front wheel steering cylinder; 29. a front wheel steering drop arm; 30. a brake pedal weldment; 32. A master cylinder is braked; 33. a brake cylinder; 34. a brake; 35. a clutch pedal closure; 36. a clutch master cylinder; 37. a clutch slave cylinder; 38. a clutch; 40. A seat; 41. an accelerator pedal; 42. a front wheel; 43. a rear wheel; 44. a differential lock lever; 45. a parking brake handle; 46. a power take-off disconnect lever; 47. an external suspension gear box; 48. a shift lever; 49. a sub-shift lever; 50. a transfer case lever; 51. a roller; 52. positioning a plate; 53. a travel switch is positioned towards the rear; 54. positioning a travel switch towards the front position; 55. a steering hydraulic reversing travel switch; 56. and a power output shaft.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.

Example 1

The tractor capable of being driven in two directions and hanging and pushing the similar agricultural implements in the embodiment refers to the attached figures 1-7, and comprises a power driving mechanism arranged on a tractor frame body and a rotary driving platform 1 capable of realizing front-back two-way driving; two front wheels 42 and two rear wheels 43 are installed at the bottom of the tractor frame body, a power driving mechanism comprises an engine 16, a transmission case 17 and a gearbox 18, a hydraulic multi-way valve 15 is installed near a rotary driving platform 1, the transmission case 17 drives a hydraulic pump 19 to provide power for the hydraulic multi-way valve 15, one path of the hydraulic multi-way valve 15 is in power connection with a lifting oil cylinder 20 at the rear of the tractor frame body through a high-pressure oil pipe, the lifting oil cylinder 20 is used for driving a lower pull rod 22 of a lifter to lift, one end of an upper pull rod 23 and one end of a lower pull rod 22 of the lifter are hinged on the tractor frame body, the hydraulic multi-way valve 15 is also respectively connected with sockets 21 of a plurality of hydraulic quick connectors through a plurality of high-pressure oil pipes, the sockets 21 of the hydraulic connectors are connected with plugs of the quick connectors of the hooked agricultural implements, after the sockets 21 of the hydraulic quick connectors are plugged with the plugs of the hydraulic connectors, the power of the tractor transmission case 17 can be transmitted to the hooked agricultural implement;

a power output shaft 56 powered by a power driving mechanism is also arranged at the rear part of the tractor frame body, and the power output shaft 56 is butted with the main power input end of the agricultural implement through a transmission shaft;

in order to make the rotary driving platform 1 flexibly turn back and forth under the state without shielding, the following parts on the tractor are correspondingly adjusted in position, specifically: an external suspension gear box 47, a gear shift lever 48, an auxiliary gear shift operating lever 49, a differential lock operating lever 44, a parking brake handle 45 and a power output separating lever 46 are arranged between the rotary driving platform 1 and one of the rear wheels 43, and a transfer box operating lever 50 is arranged between the rotary driving platform 1 and the other rear wheel 43;

the concrete structure of the rotary driving platform 1: the rotary driving platform 1 comprises a driving platform shell 9, a seat 40, an instrument platform 10, a rotary switch 11, an accelerator pedal 41 and a connecting upright post 12 which can synchronously rotate along with the driving platform shell 9 are arranged in the driving platform shell 9, and a hydraulic power steering mechanism, a brake pedal mechanism and a clutch pedal mechanism for realizing the left-right turning of the tractor are arranged on the connecting upright post 12;

the hydraulic power steering mechanism comprises a steering hydraulic reversing valve 25 arranged on a driving platform base 8, a hydraulic steering gear 27 is arranged on a connecting upright post 12, a transmission box 17 transmits power to the hydraulic steering gear 27 through a constant flow pump 26, the hydraulic steering gear 27 is connected with the steering hydraulic reversing valve 25, the steering hydraulic reversing valve 25 is connected with a front wheel steering oil cylinder 28, and the front wheel steering oil cylinder 28 is hinged with a front wheel steering vertical arm 29 so as to drive a front wheel 42 to rotate leftwards or rightwards; the brake pedal mechanism comprises a brake pedal welding part 30 hinged on the connecting upright post 12, one end of the brake pedal welding part 30 is connected with a master cylinder 32, the master cylinder 32 is connected with a brake cylinder 33 through an oil pipe, and the brake cylinder 33 is connected with a brake 34; the clutch pedal mechanism comprises a clutch pedal welding part 35, one end of the clutch pedal welding part 35 is connected with a clutch master cylinder 36, the clutch master cylinder 36 is connected with a clutch slave cylinder 37 through an oil pipe, and the clutch slave cylinder 37 is connected with a clutch 38;

the hydraulic rotary joint 2 is arranged at the bottom of a driving platform shell 9, the base end of the hydraulic rotary joint 2 is fixed on a tractor frame body to replace a central shaft, the rotating head end is connected to the center of a rotary fluted disc 5 to replace a central shaft sleeve, so that the dual functions of the rotary support of the driving platform and the avoidance of high-pressure pipeline winding during rotation are realized, the hydraulic rotary joint 2 comprises a hydraulic rotary joint base 3 arranged at the bottom on the tractor frame body, a hydraulic rotary joint rotating head 4 is arranged on the hydraulic rotary joint base 3, the hydraulic rotary joint rotating head 4 is linked with the rotary fluted disc 5, the rotary fluted disc 5 is meshed with a rotary gear 6, the rotary gear 6 is controlled by a rotary motor 7, the rotary motor 7 is controlled by a rotary switch 11, the rotary motor 7 is driven after the rotary switch 11 is powered on, the rotary motor 7 is driven to rotate by the rotary fluted disc 5 through the rotary gear 6 in a rotating meshed manner, and the rotary fluted disc 5 is positioned above the driving platform base 8, the upper surface of the driving platform base 8 is provided with a roller 51, and a positioning reversing mechanism for limiting the rotary fluted disc 5 is arranged between the rotary fluted disc 5 and the driving platform base 8;

the positioning reversing mechanism comprises a positioning plate 52 arranged on the edge of a rotary fluted disc 5, a backward positioning travel switch 53 and a steering hydraulic reversing travel switch 55 are arranged at the corresponding position of a driving platform base 8 in parallel, the steering hydraulic reversing travel switch 55 is connected with a hydraulic reversing valve 25, a forward positioning travel switch 54 is arranged at the position, opposite to the backward positioning travel switch 53, on the driving platform base 8, when the rotary fluted disc 5 is operated to rotate from the forward position to the backward position together with the rotary driving platform 1, the backward positioning travel switch 53 is toggled by the positioning plate 52 to stop rotating to realize backward positioning, meanwhile, the steering hydraulic reversing travel switch 55 arranged in parallel is also toggled, the steering hydraulic reversing travel switch 55 electrically drives the steering hydraulic reversing valve 25 to work to realize that the action of a power steering wheel at the back is consistent with the operation direction of the steering wheel, or the backward positioning travel switch 5 is toggled by the positioning plate 52 when the rotary driving platform 1 rotates forwards The travel switch 54 stops rotating to realize forward positioning, the positioning plate 52 is also separated from the steering hydraulic reversing travel switch 55 to be powered off, the steering hydraulic reversing valve 25 is restored to the original forward position after being powered off, the action of the power steering wheel in the front is consistent with the steering wheel operation direction, and therefore the rotary driving platform 1 can realize positioning reversing repeatedly and the action of the power steering wheel after reversing is consistent with the steering wheel operation direction all the time.

The utility model relates to a tractor capable of driving in two directions and hanging and pushing agricultural implements, the principle of the main function is that when driving operation needs to be performed backwards, personnel in situ control the rotary motor 7 to work by operating the rotary switch 11, the rotary motor 7 drives the rotary driving platform 1 to rotate backwards, when the rotary driving platform 1 reaches a preset position, the positioning plate 52 simultaneously stirs and presses the backward position positioning travel switch 53 to be powered off and the steering hydraulic reversing travel switch 55 to be powered on, the controlled rotary motor 7 stops after the backward position positioning travel switch 53 is powered off, namely the rotary driving platform 1 is positioned and stopped at the backward position, the personnel can perform various operations towards the backward direction, and the controlled steering hydraulic reversing valve 25 is converted into a power steering wheel (namely the front wheel 42) after the power on, the turning direction of the power steering wheel 13 is consistent, on the contrary, when forward driving operation is needed, a person does not move in situ and controls the rotary motor 7 to work reversely by operating the rotary switch 11 reversely, the rotary motor 7 drives the rotary driving platform 1 to rotate forward, the positioning plate 52 immediately leaves the backward position positioning travel switch 53 and the steering hydraulic reversing travel switch 55, the backward position positioning travel switch 53 is electrified again, the rotary driving platform 1 is driven to rotate forward by the rotary motor 7, the steering hydraulic reversing travel switch 55 is powered off to convert the controlled steering hydraulic reversing valve 25 to the forward turning direction of the power steering wheel to be consistent with the operation direction of the steering wheel 13, when the rotary driving platform 1 reaches the forward positioning position, the positioning plate 52 toggles and presses the forward position positioning travel switch 54 to be powered off, the controlled rotary motor 7 stops after the forward position positioning travel switch 54 is powered off, so that the rotary driving platform 1 is positioned and stopped at the forward position, the person can do various operations towards the front direction, and the bidirectional driving of the tractor can be realized by repeating the operations. The principle of the tractor is that the single-way design of an original hydraulic pump 19 which is only responsible for driving a lifting oil cylinder 20 is changed into a driving multi-way design, after a hydraulic multi-way valve 15 is additionally arranged, one way of the hydraulic multi-way valve drives the lifting oil cylinder 20, the other ways of the hydraulic multi-way valve are used as spare hydraulic power output through a socket 21 additionally provided with a hydraulic quick coupler, so that various complex equipment can be quickly hooked to the maximum extent without additional hydraulic power sources, when the tractor is used, only connecting points of the equipment are respectively connected to a lower pull rod 22 and an upper pull rod 23, a main power input end of the equipment is connected with a power output shaft 56 through a transmission shaft, the hydraulic power sources of the equipment can be respectively connected with the socket 21 of the hydraulic quick coupler through a hydraulic oil pipe and a plug of the hydraulic quick coupler, and when the tractor is operated, the tractor can finish lifting of the lifting oil cylinder 20, lifting and pushing the tractor through only controlling a corresponding handle of the hydraulic multi-way valve 15, And all tasks such as equipment host machine work, equipment auxiliary function work and the like.

Claims (9)

1. The tractor is characterized by comprising a power driving mechanism and a rotary driving platform which are arranged on a tractor frame body, a hydraulic multi-way valve powered by the power driving mechanism is arranged near the rotary driving platform, one path of the hydraulic multi-way valve is in power connection with a lifting oil cylinder behind the tractor frame body through a high-pressure oil pipe, the lifting oil cylinder is used for driving a lower pull rod of a lifter to lift, one ends of an upper pull rod and the lower pull rod of the lifter are hinged on the multi-way tractor frame body, the hydraulic multi-way valve is further connected with sockets of a plurality of hydraulic quick connectors through a plurality of high-pressure oil pipes, and the sockets of the hydraulic quick connectors are connected with plugs of the quick connectors of the hooked agricultural implements.

2. The tractor according to claim 1, wherein two front wheels and two rear wheels are mounted at the bottom of the tractor frame, the power driving mechanism comprises an engine, a transmission case and a gearbox, and the transmission case power drives the hydraulic pump to provide power for the hydraulic multi-way valve.

3. The tractor according to claim 1, wherein a power output shaft powered by a power driving mechanism is further mounted at the rear of the tractor frame body, and the power output shaft is in butt joint with a power input end of an agricultural implement through a transmission shaft.

4. A tractor capable of being steered in two directions and hitching a propelling agricultural implement according to claim 1, wherein an external suspension gear box, a gear shift lever, an auxiliary gear shift lever, a differential lock lever, a parking brake lever, a power take-off lever are provided between the rotary driving platform and one of the rear wheels, and a transfer case lever is provided between the rotary driving platform and the other rear wheel.

5. The tractor according to claim 2, wherein the rotary driving platform comprises a driving platform shell, a seat, an instrument desk, a rotary switch, an accelerator pedal and a connecting upright post are mounted in the driving platform shell, and a hydraulic power steering mechanism, a brake pedal mechanism and a clutch pedal mechanism for realizing left-right turning of the tractor are mounted on the connecting upright post.

6. The tractor according to claim 5, wherein the hydraulic power steering mechanism comprises a steering hydraulic directional valve mounted on the base of the driving platform, a hydraulic steering gear is mounted on the connecting upright post, the transmission box transmits power to the hydraulic steering gear through a constant flow pump, the hydraulic steering gear is connected with the steering hydraulic directional valve, the steering hydraulic directional valve is connected with a front wheel steering cylinder, and the front wheel steering cylinder is hinged with a front wheel steering vertical arm so as to drive the front wheel to rotate left or right.

7. The tractor capable of being driven in two directions and hitching and pushing an agricultural implement according to claim 5, wherein the brake pedal mechanism comprises a brake pedal welding piece hinged on the connecting upright post, one end of the brake pedal welding piece is connected with a master cylinder, the master cylinder is connected with a brake cylinder through an oil pipe, and the brake cylinder is connected with a brake; the clutch pedal mechanism comprises a clutch pedal welding part, one end of the clutch pedal welding part is connected with a clutch master cylinder, the clutch master cylinder is connected with a clutch slave cylinder through an oil pipe, and the clutch slave cylinder is connected with a clutch.

8. The tractor capable of being driven in two directions and hitching and pushing the similar agricultural implement according to claim 5, the hydraulic rotary joint is installed at the bottom of the driving platform shell and comprises a hydraulic rotary joint base, the bottom of the hydraulic rotary joint base is installed on a tractor frame body, a hydraulic rotary joint rotary head is installed on the hydraulic rotary joint base and linked with a rotary fluted disc, the rotary fluted disc is meshed with a rotary gear, the rotary gear is controlled by a rotary motor, the rotary motor is controlled by a rotary switch, the rotary switch is controlled to drive the rotary motor after being electrified, the rotary motor drives the rotary fluted disc to rotate through the rotary gear in a rotating and meshing mode, the rotary fluted disc is located above the driving platform base, idler wheels are installed on the upper surface of the driving platform base, and a positioning reversing mechanism used for limiting the rotary fluted disc is installed between the rotary fluted disc and the driving platform base.

9. The tractor according to claim 8, wherein the positioning and reversing mechanism comprises a positioning plate mounted on the edge of the rotary fluted disc, a backward positioning travel switch and a steering hydraulic reversing travel switch are mounted in parallel at a position corresponding to the base of the driving platform, the steering hydraulic reversing travel switch is connected with the hydraulic reversing valve, and a forward positioning travel switch is mounted at a position on the base of the driving platform opposite to the backward positioning travel switch.

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