A light distance-adjustable chassis and a distance-adjusting method thereof

Abstract

The present application relates to a kind of portable distance adjusting chassis and its distance adjusting method, belong to agricultural machinery technical field, including frame, seat assembly, rear wheel assembly, front wheel assembly, track assembly and drive assembly, the seat assembly includes seat and seat support, the seat support includes seat lower support and the seat lower support vertical connection seat cross support, the seat cross support is connected with the lower seat lower support near end, the rear wheel assembly is arranged below, the seat cross support is rotatably connected with the frame, and when being opposite to overturn with the frame, the rear wheel of rear wheel assembly can just contact ground and form support, and make track assembly form suspension, seat and seat lower support jointly constitute same overturning force arm, make distance changing operation extremely labor-saving, and in any position, any time is carried out, significantly improve the adaptability of the chassis.

Description

Technical Field

[0001] This invention relates to the field of agricultural machinery technology, specifically to a lightweight adjustable chassis and its adjustment method. Background Technology

[0002] Hilly and mountainous areas have small plots, large undulations, and heavy clay soil. For crops that require ridging before mechanized transplanting, traditional transplanter wheeled chassis have problems such as large size and weight, and poor maneuverability and steering performance. In addition, the complex terrain and narrow and rugged roads in hilly and mountainous areas greatly limit the transportation and operation of agricultural machinery.

[0003] Due to the limitations of specific terrain and different ridging widths, the wheel track of the transplanter needs to be adjusted accordingly. Currently, small transplanters suitable for mountainous or complex terrain areas require simple structure and light weight and do not have adjustment functions. Large transplanters that are not suitable for mountainous areas, even if they have adjustment functions, are not suitable for use in mountainous areas. The main reason is that traditional wheeled transplanting machinery is large in size and weight, has poor maneuverability and steering performance, and its wheel track adjustment requires manual support of the entire equipment on flat areas before adjustment. The whole process is time-consuming and labor-intensive and requires a certain amount of space, which is difficult to achieve in mountainous areas.

[0004] However, if an adjustable track structure is added directly to a small transplanter, the tracks may be damaged due to friction caused by gravity during the adjustment process, since the tracks are directly supported on the ground. Furthermore, the friction also increases the adjustment force, making the adjustment more difficult.

[0005] Therefore, it is necessary to develop a transplanter adapted to mountainous operations, which can adjust the wheel track at any location and at any time to adapt to use in complex areas. Summary of the Invention

[0006] In view of this, the purpose of the present invention is to provide a lightweight adjustable wheel track chassis and its adjustment method to solve the problem of poor adaptability of the existing technology in mountainous areas where the wheel track cannot be adjusted.

[0007] One of the present inventions is achieved through the following technical solution:

[0008] A lightweight adjustable pitch chassis includes a frame, a seat assembly, a rear wheel assembly, a front wheel assembly, a track assembly, and a drive assembly. The seat assembly includes a seat and a seat bracket. The seat bracket includes a lower seat bracket and a seat cross bracket perpendicularly connected to the lower seat bracket. The rear wheel assembly is located below the proximal end of the seat cross bracket connected to the lower seat bracket. The distal end of the seat cross bracket is rotatably connected to the frame. When the rear wheel of the rear wheel assembly is rotated relative to the frame, it can contact the ground to provide support and suspend the track assembly. The seat and the lower seat bracket together form the same tilting arm.

[0009] Furthermore, the frame is fixedly provided with a vertical fixing lug, the vertical fixing lug is provided with a pin hole, and the lower end of the seat lower bracket is fixed to the frame by inserting a horizontal fixing pin into the pin hole.

[0010] Furthermore, the seat cross bracket is rotatably connected to the frame via a vertical fixing pin.

[0011] Furthermore, the rear wheel assembly includes a rear wheel mounting bracket bolted to the seat bracket and a rear wheel that rotates on the mounting bracket.

[0012] Furthermore, the front wheel assembly includes a front wheel sleeve fixed to the frame, a front wheel rod that slides with the front wheel sleeve, a front wheel frame fixed to the end of the front wheel rod, and a front wheel that is rotatably connected to the front wheel frame.

[0013] Furthermore, the track assembly includes a track, a track tensioner, a tensioning bar, track rollers, a track bracket, and a track bearing housing.

[0014] Furthermore, the drive assembly includes a reducer, a track drive shaft, and a track bearing housing. The output end of the reducer is provided with a drive shaft sleeve. The track drive shaft is fixed to the frame through the drive bearing housing. The drive shaft sleeve is provided with a hexagonal hole. The track drive shaft is a hexagonal shaft that is inserted into the hexagonal hole. The track bearing housing is provided with an adjustment hole that slides with the hexagonal shaft, and the hexagonal shaft extends through the adjustment hole to both sides of the track.

[0015] Furthermore, the track support is provided with a track support bushing and a track support shaft that slides in cooperation with the track support bushing.

[0016] Furthermore, it also includes a pitch adjuster, which includes a lead screw bushing fixed on the track support bushing and a reciprocating lead screw threadedly connected to the lead screw bushing. The reciprocating lead screw is slidably connected to the track bracket through a lead screw fixing plate.

[0017] The second aspect of this invention is achieved through the following technical solution:

[0018] A method for adjusting the pitch of a lightweight adjustable chassis as described above, characterized in that:

[0019] S1: Release the seat, the rear wheel touches the ground to form support, use the point of contact as the fulcrum, and use the seat and the seat under bracket as levers to press the seat, so that the track is suspended in the air;

[0020] S2: Rotate the reciprocating screw, the track support bushing slides along the track support bushing, and the track drive shaft slides along the track bearing seat, so that the two tracks move away from or closer to each other to reach the set distance;

[0021] SS: Front wheel torque deflection.

[0022] The beneficial effects of this invention are as follows:

[0023] 1. For machinery using this chassis, when the track wheels bear a large weight, this structure can still make relatively convenient on-site adjustments to the tracks and wheelbase. By using the chair as a lever and the wheels behind it as fulcrums, it can support a large weight.

[0024] 2. Given the terrain characteristics of hilly and mountainous areas, such as complex terrain, narrow and rugged roads, and small plots, tracked wheel drive provides better passability, and the use of triangular tracks increases the chassis height and enhances its obstacle-crossing ability.

[0025] 3. Using the rear wheel as a support ensures that the track body is not damaged during track pitch change, and avoids track wear caused by track friction with the ground during pitch change, which could damage the chassis mechanical structure.

[0026] 4. If the wheels at the back of the chair are not strong enough, they can be replaced with stronger solid wheels or iron wheels to enhance their support.

[0027] In summary, this invention, through a specific structural design, enables machinery with this chassis to adjust its wheelbase at any position and at any time, adapting to complex applications and enhancing its versatility. Furthermore, during operation, the rear wheel contact point serves as the fulcrum, with the seat and its lower support acting as levers to press the seat. The seat and its lower support together form the same tilting arm, making the wheelbase adjustment operation extremely labor-saving and significantly improving operational convenience and efficiency. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the first direction of the present invention;

[0029] Figure 2 This is a schematic diagram of the second direction of the present invention;

[0030] Figure 3 This is a third-party schematic diagram of the present invention;

[0031] Figure 4 This is a schematic diagram of the distance adjustment of the present invention;

[0032] Figure 5 for Figure 4 Top view.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. Frame, 2. Track, 3. Track tensioner, 4. Tensioner rod, 5. Track roller, 6. Track bracket, 7. Track bearing housing, 8. Track drive shaft, 9. Screw handle, 10. Reciprocating screw, 11. Drive shaft sleeve, 12. Reducer, 13. Rear wheel retaining bracket, 14. Rear wheel retaining hole, 15. Rear wheel hub, 16. Rear wheel, 17. Horizontal retaining pin, 18. Vertical retaining lug, 19. Seat 20. Seat, 21. Front wheel rod, 22. Front wheel rod sleeve, 23. Front wheel frame, 24. Front wheel hub, 25. Front wheel, 26. Seat cross support, 27. Upper vertical fixing pin, 28. Lower vertical fixing pin hole, 29. Track support shaft, 30. Track support shaft sleeve, 31. Lead screw fixing plate, 32. Lead screw nut, 33. Lead screw fixing plate, 34. Lead screw bushing, 35. Transmission bearing seat. Detailed Implementation

[0035] 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 some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0037] It should be noted that similar labels 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.

[0038] In the above description of the present invention, it should be noted that the terms "one side," "the other side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is conventionally placed during use. These terms are used only for the convenience of describing the present invention and for 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 present invention. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0039] Furthermore, terms such as "identical" do not imply that components must be absolutely identical; minor differences are permissible. The term "perpendicular" simply means that the positional relationship between components is more perpendicular than "parallel," not that the structure must be perfectly perpendicular; a slight tilt is acceptable.

[0040] like Figures 1 to 5 As shown in this embodiment, a lightweight adjustable track chassis is not an independent device but is fixed together with a transplanter or other agricultural machinery to serve agricultural operations. Addressing the issue of varying ridging widths required for planting in different regions, a variable track chassis system was independently designed and developed. This system employs a combination of round and hexagonal shaft transmission and, taking advantage of the characteristics of lead screws, utilizes a reliable and labor-saving mechanism for track adjustment, making it convenient, quick, time-saving, and labor-saving, allowing for on-site adjustment of track spacing.

[0041] Specific structure: includes frame, seat assembly, rear wheel assembly, front wheel assembly, track assembly and drive assembly.

[0042] The seat assembly includes a seat 20 and a seat bracket. The seat bracket includes a lower seat bracket 19 and a cross seat bracket 26. A rear wheel assembly is located below the near end of the cross seat bracket that connects to the lower seat bracket. The far end of the cross seat bracket is rotatably connected to the frame. When the cross seat bracket is flipped relative to the frame, the rear wheel of the rear wheel assembly can contact the ground to form support and make the track assembly suspended. The seat and the lower seat bracket together form the same flipping arm.

[0043] The drive assembly includes a reducer 12, a track drive shaft 8, and a track bearing housing 7. The reducer is fixed at the front end of the frame. Power is transmitted to the reducer via its input shaft and then output through its output shaft. At the end of the reducer's output shaft is a drive shaft sleeve 11, which has a round outer shape and a hexagonal inner shape. The track drive shaft 8 is a hexagonal shaft that is nested with the drive shaft sleeve 8 for power transmission. The track drive shaft 8 is supported by a drive bearing housing 35, which is bolted to the frame.

[0044] A seat 20 is located above the reducer and is hinged to the frame 1 via a lower seat bracket 19 and a cross seat bracket 26. The lower end of the lower seat bracket 19 is fixed to the frame by a horizontal fixing pin 17 and a vertical fixing lug 18. The cross seat bracket 26 is vertically connected to the lower seat bracket 19, and the other end of the cross seat bracket 26 is hinged to a hole at the lower end of the frame 1 by an upper vertical fixing pin 27, allowing it to rotate around the pin. A rear wheel mounting bracket 13 is fixedly connected to the lower end of the lower seat bracket 19. The rear wheel mounting bracket 13 is fixedly connected to the rear wheel hub 15 via bolts in the rear wheel mounting hole 14, and the rear wheel 16 is fixedly connected to the rear wheel hub 15.

[0045] Track wheel assemblies are installed on both sides of the frame 1. The track assembly mainly consists of track 2, track tension wheel 3, tension bar 4, track roller 5, track bracket 6, and track bearing seat 7, forming an integrated structure that can be disassembled as a whole.

[0046] The frame is mainly supported by track support bushing 30. The track support bushing 30 is composed of a hexagonal shaft with a larger side length on the outside and a hexagonal hole with a smaller side length on the inside. The track support shaft 29 and the track support bushing 30 are nested together. When no pitch change is required, it is fixed by bolts on the outside of the bushing.

[0047] The reciprocating lead screw 10 is fixed to the inside of the track bracket 6 by bolts on the lead screw fixing plate (present on both tracks) 31. The lead screw nut 32 is fixed on the lead screw fixing plate 31 and can move laterally along the reciprocating lead screw 10. The middle part of the reciprocating lead screw 10 is fixed below the track support bushing 30 by the lead screw bushing 34 and the lead screw fixing plate 33, keeping it fixed and stationary, while the reciprocating lead screw can rotate within it.

[0048] The front wheel assembly includes a front wheel bushing 22 fixed at the front of the frame. Its outer side is a hexagonal bushing with a large side length, and its inner side is a hexagonal through hole. The front wheel rod 21 and the front wheel bushing 22 are nested together and can move laterally. When no pitch change is required, it is fixed by bolts.

[0049] The specific operation of pitch adjustment is as follows:

[0050] Step 1: When changing the pitch, first pull out the pins that fix the seat, that is, the horizontal fixing pins 17 (two on the left and right) that connect the lower bracket 19 of the seat to the vertical fixing ears 18 on the frame 1. The seat rotates downward around the frame along the upper vertical fixing pin 27.

[0051] Step 2: During the rotation of the seat, the rear wheel 16 contacts the ground. Using the rear wheel 16 as the fulcrum, the seat and the lower seat support are used as levers to press the seat. The seat and the lower seat support together form the same flipping lever arm, which pries the two track wheels off the ground. The pitch change operation is extremely labor-saving.

[0052] Step 3: Use the fixing pin to fix the seat through the lower vertical fixing pin hole 28 and the second hole on the seat cross bracket. At this time, the rear wheel acts as the support wheel and the track is suspended in the air.

[0053] Step 4: Insert the tool into the screw handle 9 and rotate the reciprocating screw 10. When force is applied, the screw nut 32 drives the screw fixing plate 33 and the integrated track assembly to move outward along the track support axis to a suitable width, that is, the pitch change of one track is completed. In the opposite direction, rotate the reciprocating screw on the other side to a suitable width, and the pitch change of both tracks is completed.

[0054] Step 5: Secure the track fixing bushing and track fixing shaft with bolts, remove the fixing pin inserted in the lower vertical fixing pin hole 28, and return the seat to its original position;

[0055] Step 6: Remove the bolts that secure the front wheel rod and the front wheel rod sleeve. Move the front wheel rod outward along the front wheel rod sleeve to a suitable distance and then secure it. This completes the front wheel pitch change.

[0056] Both the tracks and the front wheel completed the pitch change.

[0057] In this embodiment, the track is a V-belt, which can increase the chassis height and enhance its obstacle-crossing ability.

[0058] The rear wheel in this embodiment is not limited to a rubber wheel. The material can be selected according to actual needs, such as a metal wheel. The type can also be selected, such as an inflatable wheel or a solid wheel. To increase strength, it can be a solid wheel or a metal wheel, thereby improving its load-bearing capacity.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A lightweight adjustable pitch chassis, comprising a frame, a seat assembly, a rear wheel assembly, a front wheel assembly, a track assembly, and a drive assembly, characterized in that: the seat assembly includes a seat and a seat bracket, the seat bracket includes a lower seat bracket and a seat cross bracket perpendicularly connected to the lower seat bracket, the rear wheel assembly is disposed below the proximal end of the seat cross bracket connected to the lower seat bracket, the distal end of the seat cross bracket is rotatably connected to the frame, and when it is flipped relative to the frame, the rear wheel of the rear wheel assembly can just contact the ground to form support, and the track assembly is suspended in the air, the seat and the lower seat bracket together form the same flipping lever arm, the frame is fixedly provided with a vertical fixing lug, the vertical fixing lug is provided with a pin hole, the lower end of the lower seat bracket is fixed to the frame by inserting a horizontal fixing pin into the pin hole, and the seat cross bracket is rotatably connected to the frame by a vertical fixing pin.

2. The lightweight adjustable chassis according to claim 1, characterized in that: The rear wheel assembly includes a rear wheel mounting bracket bolted to the seat bracket and a rear wheel rotatably fixed to the rear wheel mounting bracket.

3. The lightweight adjustable chassis according to claim 1, characterized in that: The front wheel assembly includes a front wheel bushing fixed to the frame, a front wheel rod that slides with the front wheel bushing, a front wheel frame fixed to the end of the front wheel rod, and a front wheel that is rotatably connected to the front wheel frame.

4. The lightweight adjustable chassis according to claim 1, characterized in that: The track assembly includes a track, a track tensioner, a tensioning bar, track rollers, a track bracket, and a track bearing housing. The track is a triangular track, the track bracket is disposed inside the triangular track, and the track bearing housing is fixed on the track bracket.

5. A lightweight adjustable chassis according to claim 4, characterized in that: The drive assembly includes a reducer, a track drive shaft, and a track bearing housing. The output end of the reducer is provided with a drive shaft sleeve. The track drive shaft is fixed to the frame through the drive bearing housing. The drive shaft sleeve is provided with a hexagonal hole. The track drive shaft is a hexagonal shaft that is inserted into the hexagonal hole. The track bearing housing is provided with an adjustment hole that slides with the hexagonal shaft, and the hexagonal shaft extends through the adjustment hole to both sides of the track.

6. A lightweight adjustable chassis according to claim 5, characterized in that: The track support is provided with a track support bushing and a track support shaft that slides in cooperation with the track support bushing.

7. A lightweight adjustable chassis according to claim 6, characterized in that: It also includes a pitch adjuster, which includes a lead screw bushing fixed on the track support bushing and a reciprocating lead screw threadedly connected to the lead screw bushing. The reciprocating lead screw is slidably connected to the track bracket through a lead screw fixing plate.

8. A method for adjusting the pitch of a lightweight adjustable chassis according to claim 7, characterized in that: S1: Release the seat, the rear wheel touches the ground to form support, use the point of contact as the fulcrum, and use the seat and the seat under bracket as levers to press the seat, so that the track is suspended in the air; S2: Rotate the reciprocating screw, the track support shaft slides along the track support shaft sleeve, and the track drive shaft slides along the track bearing seat, so that the two tracks move away from or closer to each other to reach the set distance; S3: Front wheel torque adjustment.

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