A rotary cultivator steering control mechanism

Abstract

The application discloses a rotary cultivator steering control mechanism, which comprises a rotary cultivator body, a steering machine support, a steering frame, a steering push plate, a rack, a guide rail assembly, a rotary support plate, a steering reset air cylinder, two steering pull rods and a double-piston pump. The rotary cultivator steering control mechanism has the advantages of simple structure, low cost, convenient and fast speed, good smoothness, high flexibility, small turning radius and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of agricultural machinery equipment, and particularly relates to a rotary tiller steering control mechanism. BACKGROUND

[0002] At present, with the popularization of agricultural mechanization, various agricultural equipment such as micro tillers, rotary tillers and harvesters are increasingly used in the processes of plowing and harvesting. For large-area plowing and plowing in hilly and mountainous areas, self-propelled track-type rotary tillers are developed to meet people's needs.

[0003] At present, large rotary tillers, especially self-propelled track-type rotary tillers, mainly use a gearbox assembly for power transmission during operation. The structure is relatively complex, the production cost is high, the transmission gear position needs to be adjusted constantly during operation, the smoothness is poor, and the operation is relatively troublesome. At the same time, the rotary tiller has a large turning radius and is not flexible in turning, which makes driving inconvenient and less adaptable to small plots.

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

[0005] In view of the above problems in the prior art, the present application aims to solve the problems of complex structure, poor smoothness, large turning radius, poor turning flexibility, inconvenient operation and high cost of the gearbox assembly of the existing rotary tiller, and provides a rotary tiller steering control mechanism that is simple in structure, can effectively reduce the cost, and is more convenient and fast in speed and steering operation, has good smoothness, high flexibility and a smaller turning radius.

[0006] To solve the above technical problems, the technical scheme adopted by the present application is as follows: a rotary tiller steering control mechanism, comprising a rotary tiller body having a steering wheel, a speed adjusting lever and a double-piston pump, the double-piston pump being connected to a walking driving hydraulic motor; characterized in that: a steering machine support is further included, the steering wheel is rotatably connected to the steering machine support through a steering shaft, the upper end of the steering shaft is connected to the steering wheel, and the lower end of the steering shaft is connected to a steering gear;

[0007] A steering frame is further arranged in the steering machine support, the steering frame is provided with a vertical steering push plate on the front and rear sides, and the two steering push plates are respectively close to the left and right sides of the steering frame; a rack is arranged on the steering frame along the left and right directions, the rack is engaged with the steering gear; and the steering frame is connected to the left and right sides of the steering machine support through a guide rail assembly and can move freely along the guide rail.

[0008] Two steering gear slide rails are provided in the bogie along its front-rear direction, and the length direction of the steering gear slide rails is set along the left-right direction of the bogie; a rotating support plate is vertically provided between the two steering gear slide rails, and the two ends of the rotating support plate are fixedly connected to the upper and lower sides of the steering gear bracket respectively, and the middle part of the two steering gear slide rails is rotatably connected to the rotating support plate.

[0009] A steering reset cylinder is provided on each side of the two steering gear slide rails that are opposite to each other. One end of the steering reset cylinder is rotatably connected to the steering gear bracket, and the other end is slidably connected to the steering gear slide rail through a sliding member. In the initial state, the piston rod is in the extended state, and the sliding member is in contact with the steering push plate.

[0010] It also includes two steering tie rods, the upper ends of which are rotatably connected to the cylinder of a steering reset cylinder, and the lower ends are connected to the two adjusting arms of a double plunger pump through a steering linkage mechanism.

[0011] The speed control lever is rotatably connected to one end of the two steering gear slide rails via a speed control linkage mechanism.

[0012] In this design, initially, the steering gear is located in the middle of the rack. Pushing or pulling the speed control lever causes the steering slide rail to rotate around the middle. One end of the steering slide rail pulls up the steering tie rod, while the other end presses down on the steering tie rod, which can simultaneously adjust the output of the dual plunger pump to achieve straight-line driving. When the steering wheel is turned, it can drive the bogie to move and compress the steering reset cylinder on one side of the bogie. The steering reset cylinder is compressed and rotated at the same time, thereby pulling up or pressing down the steering tie rod, which increases or decreases the output of one output port of the dual plunger pump, thus achieving steering.

[0013] Furthermore, the steering gear bracket 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 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.

[0014] Furthermore, the cylinder of the steering reset cylinder is rotatably connected to one end of the steering push plate on the side away from the steering gear bracket; the piston rod of the steering reset cylinder is slidably connected to the steering gear slide rail through a sliding member.

[0015] Furthermore, the cylinder barrel of the steering reset cylinder is connected to the cylinder seat, which is rotatably connected to the steering gear bracket; the steering tie rod is rotatably connected to the cylinder seat.

[0016] Furthermore, the cylinder seat has an L-shaped cross-section, with one arm rotatably connected to the steering gear bracket, and the steering reset cylinder fixedly connected to this 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 near the steering reset cylinder; the steering tie rod is connected to the end of the cylinder seat away from the steering gear bracket.

[0017] Furthermore, the sliding member includes two rollers connected by a connecting shaft; one roller is connected to the steering gear slide rail, and the other roller is in contact with the push plate.

[0018] Furthermore, the steering gear slide rail has a guide groove arranged along its length, and the roller is located in the guide groove; a limiting plate is provided on the outside of the guide groove, and a strip-shaped limiting hole is provided on the limiting plate corresponding to the guide groove. The width of the limiting hole is greater than the diameter of the connecting shaft and less than the diameter of the roller; the connecting shaft is located in the limiting hole.

[0019] Furthermore, the bogie includes a rectangular upper mounting frame and two rectangular lower mounting plates. The two sides of the upper mounting frame are connected to the two lower mounting plates by a connecting plate and a steering push plate, respectively. The two steering push plates are located at opposite ends of the two lower mounting plates, and the two connecting plates are located at the other ends of the two lower mounting plates. The rack is mounted on the upper side of the upper mounting frame.

[0020] Furthermore, the two lower mounting plates of the bogie are connected to the steering gear bracket via guide rail assemblies, and the bogie can move left and right along the guide rails when the steering wheel is turned.

[0021] Compared with existing technologies, this invention has the following advantages: a simple overall structure, effectively reducing costs; and the ability to achieve stepless speed regulation during the straight-line movement of the rotary tiller, resulting in smoother speed control. Simultaneously, the steering control mechanism has a simpler structure, making the steering transmission more stable and reliable, steering operation more convenient and quick, highly flexible, and with a smaller turning radius. Furthermore, this solution allows steering only during movement, enhancing safety. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the present invention.

[0023] Figure 2 This is a partial structural diagram of the present invention.

[0024] Figure 3 for Figure 2 A schematic diagram of the structure after omitting the steering gear bracket.

[0025] Figure 4 for Figure 3 A schematic diagram of the structure after omitting part of the bogie.

[0026] In the diagram: 1—Steering wheel, 2—Gear shift lever, 3—Double plunger pump, 4—Steering gear bracket, 5—Steering shaft, 6—Steering gear, 7—Bogie, 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 component, 15—Steering tie rod, 16—Support plate, 17—Cylinder seat, 18—Limit plate. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to represent selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0029] It should be noted that similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures, or the orientation or positional relationship commonly used when the product is in use. They are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. In addition, the terms "horizontal," "vertical," etc., do not indicate that the component is required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" simply 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 this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0030] Example: See Figures 1 to 4A steering control mechanism for a rotary tiller includes a rotary tiller body, which has a steering wheel 1, a speed control lever 2, and a dual plunger pump 3. The dual plunger pump 3 has two adjusting arms, two oil inlets, and two oil outlets. The oil outlets of the dual plunger pump 3 are connected to a travel drive hydraulic motor. In this design, the forward, backward, left, and right directions are all referenced to the rotary tiller's travel direction.

[0031] It also includes a steering gear bracket 4. The steering wheel 1 is rotatably connected to the steering frame via 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. In implementation, the steering gear bracket 4 is a rectangular frame structure, and its length direction is consistent with the left-right direction of the rotary tiller body. A support plate 16 is provided on the upper side of the steering gear bracket 4, and the steering shaft 5 is rotatably connected to the support plate 16 via bearings.

[0032] A bogie 7 is also provided inside the steering gear bracket 4. The bogie 7 has a vertically arranged steering push plate 8 on its front and rear sides, with the two steering push plates 8 positioned close to the left and right sides of the bogie 7, respectively. A rack 9 is provided on the bogie 7 along its left-right direction, and the rack 9 meshes 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 connected to the two lower mounting plates via a connecting plate and a steering push plate 8, respectively. The two steering push plates 8 are located at opposite ends of the two lower mounting plates, and the two connecting plates are located at the other ends of the two lower mounting plates. The rack 9 is mounted on the upper side of the upper mounting frame. The bogie 7 is connected to the left and right sides of the steering gear bracket 4 via a guide rail assembly 10 and can move freely along the guide rail. In practice, the two lower mounting plates of the bogie 7 are connected to the steering gear bracket 4 via a guide rail assembly 10, and when the steering wheel 1 is rotated, the bogie 7 can move left and right along the guide rail.

[0033] Two steering gear slide rails 11 are provided within the bogie 7 along its longitudinal direction, and the length direction of the steering gear slide rails 11 is arranged along the left-right direction of the bogie 7. A rotating support plate 12 is vertically provided between the two steering gear slide rails 11. The upper and lower ends of the rotating support plate 12 are fixedly connected to the upper and lower sides of the steering gear bracket 4, respectively. In practice, the rotating support plate 12 is located at the middle of the length direction of the steering gear bracket 4. The middle of the two steering gear slide rails 11 is rotatably connected to the rotating support plate 12; in practice, the two steering gear slide rails 11 are connected to the rotating support plate 12 by the same bolt.

[0034] A steering reset cylinder 13 is provided on each of the two opposing sides of the steering gear slide rails 11. One end of the steering reset cylinder 13 is rotatably connected to the steering gear bracket 4, and the other end is slidably connected to the steering gear slide rail 11 via a sliding member 14. In the initial state, the piston rod is in the 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 rotatably connected to the end of the steering push plate 8 on the opposite side of the steering gear bracket 4; the piston rod of the steering reset cylinder 13 is slidably connected to the steering gear slide rail 11 via the sliding member 14. In actual assembly, the cylinder barrel of the steering reset cylinder 13 is connected to the cylinder seat 17, which is rotatably connected to the steering gear bracket 4; the steering tie rod 15 is rotatably connected to the cylinder seat 17. As an optimization, the cross-section of the cylinder seat 17 is L-shaped, with one arm rotatably connected to the steering gear bracket 4, and the steering reset cylinder 13 fixedly connected to this arm. The other arm of the cylinder seat 17 extends axially along the steering reset cylinder 13 to the other end of the cylinder barrel near the steering reset cylinder 13. The steering tie rod 15 is connected to the end of the cylinder seat 17 away from the steering gear bracket 4.

[0035] The sliding member 14 includes two rollers connected by a connecting shaft; one roller is connected to the steering gear slide rail 11, and the other roller is in contact with the push plate. The steering gear slide rail 11 has a guide groove along its length, and the roller is located within the guide groove. A limiting plate 18 is provided outside the guide groove, and a strip-shaped limiting hole is provided on the limiting plate 18 corresponding to the guide groove. The width of the limiting hole is greater than the diameter of the connecting shaft and smaller than the diameter of the roller; the connecting shaft is located within the limiting hole.

[0036] It also includes two steering tie rods 15, which are located on the outer sides of the two ends of the steering gear slide rails 11. The upper ends of the two steering tie rods 15 are rotatably connected to the cylinder of a steering reset cylinder 13, and the lower ends are connected to the two adjusting arms of the double plunger pump 3 through a steering linkage mechanism. The steering linkage mechanism is existing technology, and when the steering tie rods 15 are pulled up or pressed down, they can drive the adjusting arms to rotate through the steering linkage mechanism.

[0037] The speed control lever 2 is rotatably connected to one end of the two steering gear slide rails 11 adjacent to each other via a speed control linkage mechanism. The speed control linkage mechanism is also a mature existing technology. Pushing and pulling the speed control lever 2 forward and backward can push or pull the steering gear slide rail 11 upward or downward.

[0038] In this scheme, in the initial state, the steering gear 6 is located in the middle of the rack 9. Pushing or pulling the speed regulating lever 2 causes the steering gear slide rail 11 to rotate around the middle. One end of the steering gear slide rail 11 pulls up the steering tie rod 15, and the other end presses down the steering tie rod 15, which can synchronously adjust the output of the double plunger pump 3 to achieve stepless speed regulation for straight driving. During the straight-line movement of the rotary tiller, turning the steering wheel 1 moves the bogie 7 and compresses the steering reset cylinder 13 on one side of the bogie 7. When the rotary tiller is moving straight, the steering mechanism slide rail 11 is tilted. Therefore, when the bogie 7 moves and compresses the steering reset cylinder 13, the steering reset cylinder 13 rotates while being compressed. Simultaneously, since the bogie 7 can only compress one steering reset cylinder 13 when moving, only that cylinder can rotate, thus only moving the steering tie rod 15 connected to that cylinder. Consequently, only one adjusting arm of the double plunger pump 3 can rotate, increasing or decreasing the output of that port, thereby achieving steering. Meanwhile, when the speed control lever 2 is in its initial position, i.e., when the rotary tiller is stationary, the steering mechanism slide rail 11 is horizontal and not tilted. Turning the steering wheel 1 at this time only moves the steering mechanism slide rail 11 laterally, without rotation, thus preventing the steering reset cylinder 13 from rotating and achieving steering, effectively improving safety performance.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit the technical solutions. Those skilled in the art should understand that any modifications or equivalent substitutions to the technical solutions of the present invention without departing from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

Claims

1. A steering control mechanism for a rotary tiller, comprising a rotary tiller body, the rotary tiller body having a steering wheel, a speed control lever, and a dual-piston pump; characterized in that: It also includes a steering gear bracket, wherein the steering wheel is rotatably connected to the steering gear bracket 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 inside the steering gear bracket. The bogie has a vertically arranged steering push plate on its front and rear sides, and the two steering push plates are close to the left and right sides of the bogie, respectively. A rack is provided on the bogie along its left and right direction, and the rack meshes 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 gear slide rails are provided in the bogie along its front-rear direction, and the length direction of the steering gear slide rails is set along the left-right direction of the bogie; a rotating support plate is vertically provided between the two steering gear slide rails, and the two ends of the rotating support plate are fixedly connected to the upper and lower sides of the steering gear bracket respectively, and the middle part of the two steering gear slide rails is rotatably connected to the rotating support plate. A steering reset cylinder is provided on each side of the two steering gear slide rails that are opposite to each other. One end of the steering reset cylinder is rotatably connected to the steering gear bracket, and the other end is slidably connected to the steering gear slide rail through a sliding member. In the initial state, the cylinder piston rod is in the 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 of a steering reset cylinder, and the lower ends are connected to the two adjusting arms of a double plunger pump through a steering linkage mechanism. The speed control lever is rotatably connected to one end of the two steering gear slide rails via a speed control linkage mechanism.

2. The rotary tiller steering control 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 and 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. The rotary tiller steering control mechanism according to claim 2, characterized in that: The cylinder of the steering reset cylinder is rotatably connected to one end of the steering push plate on the opposite side of the steering gear bracket; the piston rod of the steering reset cylinder is slidably connected to the steering gear slide rail through a sliding member.

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

5. A rotary tiller steering control mechanism according to claim 4, characterized in that: The cylinder seat has an L-shaped cross-section, with one arm rotatably connected to the steering gear bracket, and the steering reset cylinder fixedly connected to this 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 near the steering reset cylinder; the steering tie rod is connected to the end of the cylinder seat away from the steering gear bracket.

6. The rotary tiller steering control mechanism according to claim 1, characterized in that: The sliding component includes two rollers connected by a connecting shaft; one roller is connected to the steering gear slide rail, and the other roller is in contact with the push plate.

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

8. The rotary tiller steering control mechanism according to claim 1, characterized in that: The bogie includes a rectangular upper mounting frame and two rectangular lower mounting plates. The two sides of the upper mounting frame are connected to the two lower mounting plates by a connecting plate and a steering push plate, respectively. The two steering push plates are located at opposite ends of the two lower mounting plates, and the two connecting plates are located at the other ends of the two lower mounting plates. The rack is mounted on the upper side of the upper mounting frame.

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

Images