Steering control mechanism of rotary cultivator

Abstract

The invention discloses a rotary cultivator steering control mechanism which comprises a rotary cultivator body, and the rotary cultivator body is provided with a steering wheel, a speed regulating rod and a duplex plunger pump. A steering frame is further arranged in the steering gear support, and the front side and the rear side of the steering frame are each provided with a steering push plate. A rack is arranged on the bogie; the bogie is connected with the left side and the right side of the steering gear box support through guide rail assemblies. A rotary support plate is vertically arranged between the two steering gear box slide rails; the sides, deviating from each other, of the two steering gear box sliding rails are each provided with a steering reset air cylinder. The upper ends of the two steering pull rods are respectively and rotationally connected with a steering reset cylinder, and the lower ends of the two steering pull rods are respectively connected with two adjusting arms of the duplex plunger pump through a steering connecting rod mechanism. According to the invention, the structure is simple, the cost can be effectively reduced, the speed and the steering operation are more convenient and faster, the smoothness is good, the flexibility is high, and the turning radius is smaller.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural machinery and equipment, and in particular to a steering control mechanism of a rotary tiller. Background Art

[0002] At present, with the popularization of agricultural mechanization, various agricultural equipment such as micro-tillage machines, rotary tillers, harvesters, etc. are increasingly used in the process of farming and harvesting. For large-scale farming and farming in hilly and mountainous areas, people have developed more suitable self-propelled crawler rotary tillers to meet people's needs.

[0003] At present, large rotary tillers, especially self-propelled crawler rotary tillers, mainly use gearbox assemblies for power transmission during operation. The structure is relatively complex and the production cost is high. During operation, the transmission gears need to be adjusted continuously, which makes the smoothness poor and the operation more troublesome. At the same time, during operation, the rotary tiller has a large turning radius, is not flexible in turning, is inconvenient to drive, and has poor adaptability to small plots of land.

[0004] Therefore, there is an urgent need to design a steering control mechanism that improves the operating convenience, steering flexibility, high reliability and low cost of the rotary tiller. Summary of the invention

[0005] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to solve the problems of the existing rotary tiller gearbox assembly having a complex structure, poor smoothness, large turning radius, poor steering flexibility, inconvenient operation and high cost, and to provide a rotary tiller steering control mechanism with a simple structure, which can effectively reduce costs, and has more convenient and quick speed and steering operations, good smoothness, high flexibility and a smaller turning radius.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows: a rotary tiller steering control mechanism, comprising a rotary tiller body, the rotary tiller body having a steering wheel, a speed regulating lever and a double plunger pump, the double plunger pump being used to be connected to a travel drive hydraulic motor; characterized in that: it also includes a steering machine bracket, the steering wheel is rotatably connected to the steering machine frame through a steering shaft, the upper end of the steering shaft is connected to the steering wheel, and the lower end is connected to a steering gear; A bogie is also provided in the steering gear bracket, and a vertically arranged steering push plate is respectively provided on the front and rear sides of the bogie, and the two steering push plates are respectively close to the left and right sides of the bogie; a rack is provided on the bogie along the left and right directions thereof, and the rack is meshed with the steering gear; the bogie is connected to the left and right sides of the steering gear bracket through a guide rail assembly, and can move freely along the guide rail; Two steering machine slide rails are arranged in the bogie along the front-rear direction thereof, and the length direction of the steering machine slide rails is arranged along the left-right direction of the bogie; a rotating support plate is vertically arranged between the two steering machine slide rails, and the two ends of the rotating support plate are respectively fixedly connected to the upper and lower sides of the steering machine bracket, and the middle parts of the two steering machine slide rails are rotatably connected to the rotating support plate; A steering reset cylinder is respectively provided on the opposite sides of the two steering machine slide rails, one end of the steering reset cylinder is rotatably connected to the steering machine bracket, and the other end is slidably connected to the steering machine slide rail through a sliding member. In the initial state, the piston rod is in an extended state, and the sliding member is in contact with the steering push plate; It also includes two steering tie rods, the upper ends of which are rotatably connected to the cylinder barrel of a steering reset cylinder, and the lower ends of which are respectively connected to the two adjusting arms of a double plunger pump through a steering link mechanism; The speed regulating rod is rotatably connected with one end adjacent to the two steering machine slide rails through a speed regulating connecting rod mechanism.

[0007] In this scheme, in the initial state, the steering gear is located in the middle of the rack. By pushing or pulling the speed regulating lever, the steering machine slide rail rotates around the middle part. One end of the steering machine slide rail pulls up the steering rod, and the other end presses down the steering rod. The output of the double plunger pump can be adjusted synchronously to achieve straight driving. When the steering wheel is turned, the bogie can be driven to move and the steering reset cylinder on one side of the bogie can be compressed, so that the steering reset cylinder is compressed and rotated at the same time, thereby pulling up or pressing down the steering rod, so that the output of one output port of the double plunger pump is increased or decreased, thereby achieving steering.

[0008] Furthermore, the steering gear bracket is a rectangular frame structure, and its length direction is consistent with the left-right direction of the rotary tiller body; a support plate is provided on the upper side of the steering gear bracket, and the steering shaft is rotatably connected to the support plate through a bearing.

[0009] Furthermore, the cylinder barrel of the steering reset cylinder is rotatably connected to one end of the steering push plate on the same side of the steering gear bracket away from the steering push plate; the piston rod of the steering reset cylinder is slidably connected to the steering gear slide rail through a sliding member.

[0010] Furthermore, the cylinder barrel of the steering reset cylinder is connected to a cylinder seat, and the cylinder seat is rotatably connected to a steering gear bracket; and the steering tie rod is rotatably connected to the cylinder seat.

[0011] Furthermore, the cross-section of the cylinder seat is L-shaped, one arm of which is rotatably connected to the steering gear bracket, and the steering reset cylinder is fixedly connected to the arm; the other arm of the cylinder seat extends along the axial direction of the steering reset cylinder to the other end of the cylinder barrel close to the steering reset cylinder; the steering rod is connected to the end of the cylinder seat away from the steering gear bracket.

[0012] Furthermore, the sliding member includes two rollers, which are connected via a connecting shaft; one roller is connected to the steering machine slide rail, and the other roller is in contact with the push plate.

[0013] Furthermore, the steering machine slide rail has a guide groove arranged along its length direction, and the roller is located in the guide groove; a limit plate is provided on the outside of the guide groove, and a strip-shaped limit hole is provided on the limit plate corresponding to the guide groove, and the width of the limit hole is greater than the diameter of the connecting shaft and smaller than the diameter of the roller; the connecting shaft is located in the limit hole.

[0014] Furthermore, the bogie includes a rectangular upper mounting frame and two rectangular lower mounting plates, and the two sides of the upper mounting frame are respectively connected to the two lower mounting plates through a connecting plate and a steering push plate, wherein the two steering push plates are located at one end of the two lower mounting plates opposite to each other, and the two connecting plates are located at the other end of the two lower mounting plates; the rack is installed on the upper side of the upper mounting frame.

[0015] Furthermore, the two lower mounting plates of the bogie are respectively connected to the steering gear bracket through the guide rail assembly, and when the steering wheel is rotated, the bogie can move left and right along the guide rail.

[0016] Compared with the prior art, the present invention has the following advantages: the overall structure is simple, which can effectively reduce the cost; it can realize stepless speed regulation during the straight-moving process of the rotary tiller, so that the speed control is smoother. At the same time, the steering control mechanism structure is simpler, which can make the steering transmission more stable and reliable, the steering operation more convenient and quick, with high flexibility and a smaller turning radius. Moreover, the present solution can only be turned during the moving process, which is safer. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention.

[0018] Figure 2 It is a schematic diagram of the local structure of the present invention.

[0019] Figure 3 for Figure 2 Schematic diagram of the structure after removing the steering gear bracket.

[0020] Figure 4 for Figure 3 Schematic diagram of the structure after omitting part of the bogie.

[0021] In the figure: 1—steering wheel, 2—speed regulating lever, 3—double plunger pump, 4—steering gear bracket, 5—steering shaft, 6—steering gear, 7—steering rack, 8—steering push plate, 9—rack, 10—guide rail assembly, 11—steering gear slide rail, 12—rotating support plate, 13—steering reset cylinder, 14—sliding part, 15—steering tie rod, 16—support plate, 17—cylinder seat, 18—limit plate. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0023] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In the description of the present invention, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the invention product is usually placed when used, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In addition, the terms "horizontal", "vertical", etc. do not mean that the components are absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted. In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] Example: See Figures 1 to 4A rotary tiller steering control mechanism includes a rotary tiller body, the rotary tiller body having a steering wheel 1, a speed regulating lever 2 and a double plunger pump 3, the double plunger pump 3 having two adjusting arms, two oil inlets and two oil outlets. The oil outlet of the double plunger pump 3 is used to be connected to a travel drive hydraulic motor. In this solution, the front, rear, left and right directions are all referenced to the travel direction of the rotary tiller.

[0026] It also includes a steering frame 4, the steering wheel 1 is rotatably connected to the steering frame through a vertically arranged steering shaft 5, the upper end of the steering shaft 5 is connected to the steering wheel 1, and the lower end is connected to a steering gear 6. During implementation, the steering frame 4 is a rectangular frame structure, and its length direction is consistent with the left and right direction of the rotary tiller body. A support plate 16 is provided on the upper side of the steering frame 4, and the steering shaft 5 is rotatably connected to the support plate 16 through a bearing.

[0027] A bogie 7 is also provided in the steering machine bracket 4. The front and rear sides of the bogie 7 are respectively provided with a vertically arranged steering push plate 8, and the two steering push plates 8 are respectively close to the left and right sides of the bogie 7. A rack 9 is provided on the bogie 7 along its left and right directions, and the rack 9 is meshed with the steering gear 6. Specifically, the bogie 7 includes a rectangular upper mounting frame and two rectangular lower mounting plates. The two sides of the upper mounting frame are respectively connected to the two lower mounting plates through a connecting plate and a steering push plate 8. Among them, the two steering push plates 8 are located at the ends of the two lower mounting plates that are away from each other, and the two connecting plates are located at the other ends of the two lower mounting plates. The rack 9 is installed on the upper side of the upper mounting frame. The bogie 7 is connected to the left and right sides of the steering machine bracket 4 through a guide rail assembly 10, and can move freely along the guide rail; when implemented, the two lower mounting plates of the bogie 7 are respectively connected to the steering machine bracket 4 through a guide rail assembly 10, and when the steering wheel 1 rotates, the bogie 7 can move left and right along the guide rail.

[0028] Two steering machine slide rails 11 are arranged in the bogie 7 along the front-rear direction thereof, and the length direction of the steering machine slide rails 11 is arranged along the left-right direction of the bogie 7. A rotating support plate 12 is arranged vertically between the two steering machine slide rails 11, and the upper and lower ends of the rotating support plate 12 are respectively fixedly connected to the upper and lower sides of the steering machine bracket 4. When implemented, the rotating support plate 12 is located in the middle of the length direction of the steering machine bracket 4. The middle part of the two steering machine slide rails 11 is rotatably connected to the rotating support plate 12; when implemented, the two steering machine slide rails 11 are connected to the rotating support plate 12 by the same bolt.

[0029] A steering reset cylinder 13 is provided on each side of the two steering machine slide rails 11. One end of the steering reset cylinder 13 is rotationally connected to the steering machine bracket 4, and the other end is connected to the steering machine slide rail 11 through a sliding member 14. In the initial state, the piston rod is in an extended state, and the sliding member 14 is in contact with the steering push plate 8. The cylinder barrel of the steering reset cylinder 13 is rotationally connected to the end of the steering push plate 8 on the same side of the steering machine bracket 4; the piston rod of the steering reset cylinder 13 is connected to the steering machine slide rail 11 through a sliding member 14. In the actual assembly process, the cylinder barrel of the steering reset cylinder 13 is connected to the cylinder seat 17, and the cylinder seat 17 is rotationally connected to the steering machine bracket 4; the steering tie rod 15 is rotationally connected to the cylinder seat 17. As an optimization, the cross section of the cylinder seat 17 is L-shaped, and one arm thereof is rotationally connected to the steering machine bracket 4, and the steering reset cylinder 13 is fixedly connected to the arm. The other arm of the cylinder seat 17 extends along the axial direction of the steering reset cylinder 13 to the other end of the cylinder barrel close to the steering reset cylinder 13. The steering tie rod 15 is connected to one end of the cylinder seat 17 away from the steering machine bracket 4.

[0030] The sliding member 14 includes two rollers, which are connected by a connecting shaft; one roller is connected to the steering machine slide rail 11, and the other roller is in contact with the push plate. The steering machine slide rail 11 has a guide groove arranged along its length direction, and the roller is located in the guide groove. A limit plate 18 is arranged outside the guide groove, and a strip-shaped limit hole is arranged on the limit plate 18 corresponding to the guide groove. The width of the limit hole is greater than the diameter of the connecting shaft and smaller than the diameter of the roller; the connecting shaft is located in the limit hole.

[0031] It also includes two steering tie rods 15, which are respectively located outside the two ends of the two steering machine slide rails 11, and the upper ends of the two steering tie rods 15 are respectively rotatably connected to the cylinder barrel of a steering reset cylinder 13, and the lower ends are respectively connected to the two adjustment arms of the double plunger pump 3 through a steering linkage mechanism. The steering linkage mechanism is a prior art, and when the steering tie rod 15 is pulled up or pressed down, the adjustment arm can be driven to rotate through the steering linkage mechanism.

[0032] The speed regulating rod 2 is rotatably connected to one end adjacent to the two steering machine slide rails 11 through a speed regulating connecting rod mechanism; wherein the speed regulating connecting rod mechanism is also a mature existing technology, and pushing and pulling the speed regulating rod 2 forward and backward can push or pull the steering machine slide rail 11 upward or downward to rotate it upward or downward.

[0033] In this scheme, in the initial state, the steering gear 6 is located in the middle of the rack 9, and the speed regulating rod 2 is pushed or pulled, and the steering machine slide rail 11 rotates around the middle. One end of the steering machine slide rail 11 pulls up the steering rod 15, and the other end presses down the steering rod 15, which can synchronously adjust the output of the double plunger pump 3 to achieve straight-line stepless speed regulation. When the rotary tiller is moving straight, when the steering wheel 1 is turned, the bogie 7 can be driven to move and the steering reset cylinder 13 on one side of the bogie 7 can be compressed; when the rotary tiller is moving straight, the steering machine slide rail 11 is in an inclined state, so when the bogie 7 moves to compress the steering reset cylinder 13, the steering reset cylinder 13 rotates while being compressed; at the same time, since only one of the steering reset cylinders 13 can be compressed when the bogie 7 moves, only the steering reset cylinder 13 can be driven to rotate, thereby only driving the steering tie rod 15 connected to the steering reset cylinder 13 to move, and thus only driving one of the regulating arms of the double plunger pump 3 to rotate, so as to increase or decrease the output of the output port, thereby achieving steering. At the same time, when the speed regulating lever 2 is in the initial position, that is, when the rotary tiller is in a stagnant state, the steering machine slide rail 11 is in a horizontal state without tilting. At this time, when the steering wheel 1 is turned, the steering machine slide rail 11 can only move horizontally and cannot rotate, so that the steering reset cylinder 13 does not rotate and cannot achieve steering, which can effectively improve the safety performance.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit the technical solution. Those skilled in the art should understand that those modifications or equivalent substitutions of the technical solution of the present invention that do not depart from the purpose and scope of the technical solution should be included in the scope of the claims of the present invention.

Claims

1. A rotary tiller steering mechanism, comprising a rotary tiller body, the rotary tiller body having a steering wheel, a speed regulating lever and a double plunger pump; characterized in that: It also includes a steering rack, wherein the steering wheel is rotatably connected to the steering rack via a steering shaft, the upper end of the steering shaft is connected to the steering wheel, and the lower end is connected to a steering gear; A bogie is also provided in the steering gear bracket, and a vertically arranged steering push plate is respectively provided on the front and rear sides of the bogie, and the two steering push plates are respectively close to the left and right sides of the bogie; a rack is provided on the bogie along the left and right directions thereof, and the rack is meshed with the steering gear; the bogie is connected to the left and right sides of the steering gear bracket through a guide rail assembly, and can move freely along the guide rail; Two steering machine slide rails are arranged in the bogie along the front-rear direction thereof, and the length direction of the steering machine slide rails is arranged along the left-right direction of the bogie; a rotating support plate is vertically arranged between the two steering machine slide rails, and the two ends of the rotating support plate are respectively fixedly connected to the upper and lower sides of the steering machine bracket, and the middle parts of the two steering machine slide rails are rotatably connected to the rotating support plate; A steering reset cylinder is provided on each side of the two steering machine slide rails, one end of the steering reset cylinder is rotatably connected to the steering machine bracket, and the other end is slidably connected to the steering machine slide rail through a sliding member. In the initial state, the cylinder piston rod is in an extended state, and the sliding member is in contact with the steering push plate; It also includes two steering tie rods, the upper ends of which are respectively rotatably connected to the cylinder barrel of a steering reset cylinder, and the lower ends of which are respectively connected to the two adjusting arms of a double plunger pump through a steering link mechanism; The speed regulating rod is rotatably connected with one end adjacent to the two steering machine slide rails through a speed regulating connecting rod mechanism.

2. A rotary tiller steering mechanism according to claim 1, characterized in that: The steering gear bracket is a rectangular frame structure, and its length direction is consistent with the left-right direction of the rotary tiller body; a support plate is provided on the upper side of the steering gear bracket, and the steering shaft is rotatably connected to the support plate through a bearing.

3. A rotary tiller steering mechanism according to claim 2, characterized in that: The cylinder barrel of the steering reset cylinder is rotatably connected to one end of the steering push plate on the same side of the steering machine bracket away from the steering machine; the piston rod of the steering reset cylinder is slidably connected to the steering machine slide rail through a sliding member.

4. A rotary tiller steering mechanism according to claim 1, characterized in that: The cylinder barrel of the steering reset cylinder is connected to the cylinder seat, and the cylinder seat is rotatably connected to the steering gear bracket; the steering tie rod is rotatably connected to the cylinder seat.

5. A rotary tiller steering mechanism according to claim 4, characterized in that: The cross-section of the cylinder seat is L-shaped, one arm of which is rotatably connected to the steering gear bracket, and the steering reset cylinder is fixedly connected to the arm; the other arm of the cylinder seat extends along the axial direction of the steering reset cylinder to the other end of the cylinder barrel close to the steering reset cylinder; the steering rod is connected to the end of the cylinder seat away from the steering gear bracket.

6. A rotary tiller steering mechanism according to claim 1, characterized in that: The sliding member comprises two rollers, which are connected via a connecting shaft; one roller is connected to the steering machine slide rail, and the other roller is fitted to the push plate.

7. A rotary tiller steering mechanism according to claim 6, characterized in that: The steering machine slide rail has a guide groove arranged along its length direction, and the roller is located in the guide groove; a limit plate is provided on the outside of the guide groove, and a strip-shaped limit hole is provided on the limit plate corresponding to the guide groove, and the width of the limit hole is greater than the diameter of the connecting shaft and smaller than the diameter of the roller; the connecting shaft is located in the limit hole.

8. The rotary tiller steering mechanism according to claim 1, characterized in that: The bogie comprises a rectangular upper mounting frame and two rectangular lower mounting plates, wherein the two sides of the upper mounting frame are connected to the two lower mounting plates via a connecting plate and a steering push plate respectively, wherein the two steering push plates are located at one end of the two lower mounting plates facing away from each other, and the two connecting plates are located at the other end of the two lower mounting plates; the rack is mounted on the upper side of the upper mounting frame.

9. The rotary tiller steering mechanism according to claim 3, characterized in that: The two lower mounting plates of the bogie are connected to the steering gear bracket through the guide rail assembly respectively. When the steering wheel is turned, the bogie can move left and right along the guide rail.

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