Portable distance adjusting chassis and distance adjusting method thereof

Abstract

The invention relates to a light distance adjusting chassis and a distance adjusting method thereof, and belongs to the technical field of agricultural machineries, the light distance adjusting chassis comprises a rack, a seat assembly, a rear wheel assembly, a front wheel assembly, a crawler belt assembly and a driving assembly.The seat assembly comprises a seat and a seat support, the seat support comprises a seat lower support and a seat transverse support vertically connected with the seat lower support, and the seat transverse support is connected with the front wheel assembly; the rear wheel assembly is arranged below the near end, connected with the seat lower support, of the seat transverse support, the far end of the seat transverse support is rotationally connected with the rack, and when the far end of the seat transverse support and the rack are turned over relative to each other, a rear wheel of the rear wheel assembly can just make contact with the ground to form supporting, and the crawler belt assembly is suspended. And the seat and the seat lower bracket jointly form the same overturning force arm, so that the variable pitch operation is extremely labor-saving and can be carried out at any position and any moment, and the adaptability of the chassis is obviously improved.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural machinery, and in particular to a lightweight adjustable-distance chassis and a distance adjusting method thereof. Background Art

[0002] The plots in hilly and mountainous areas are small, undulating, and the soil is heavy. For crops that require ridge formation and mechanized transplanting, the wheeled chassis of traditional transplanters have problems such as large size and weight, and poor maneuverability and steering performance. In addition, the hilly and mountainous areas have complex terrain, narrow and rugged roads, and the transportation and operation of agricultural machinery are greatly restricted.

[0003] Due to the limitations of the above-mentioned specific terrain and different ridge widths, the wheelbase of the transplanter needs to be adaptively adjusted. Currently, small-scale transplanters suitable for mountainous areas or areas with complex terrain require simple structure and light weight and do not have adjustment functions. Large-scale transplanters that are not suitable for mountainous areas are not suitable for use in mountainous areas even if they have adjustment functions. The main reason is that traditional wheeled transplanting machinery is large in size and weight, and has poor maneuverability and steering performance. The adjustment of its wheelbase requires the entire equipment to be manually supported on a flat area and then adjusted. The whole process is time-consuming and labor-intensive, and requires a corresponding site, which is difficult to achieve in mountainous areas.

[0004] If a distance adjustment structure is directly added to the small transplanter, since the crawler track is directly supported on the ground, the crawler track may be damaged during the adjustment process due to friction caused by gravity, and the friction also increases the adjustment force, making the adjustment more difficult.

[0005] Therefore, it is necessary to develop a transplanter suitable for mountainous areas, which can adjust the wheelbase at any position and at any time to adapt to the use in complex areas. Summary of the invention

[0006] In view of this, the object of the present invention is to provide a lightweight adjustable distance chassis and a distance adjustment method thereof, so as to solve the problem that the prior art cannot adjust the wheelbase and has poor adaptability when used in mountainous areas.

[0007] One of the present invention is achieved through the following technical solutions:

[0008] A lightweight adjustable-distance chassis comprises a frame, a seat assembly, a rear wheel assembly, a front wheel assembly, a track assembly and a drive assembly, wherein the seat assembly comprises a seat and a seat bracket, wherein the seat bracket comprises a seat lower bracket and a seat cross bracket vertically connected to the seat lower bracket, wherein the rear wheel assembly is arranged below the proximal end of the seat cross bracket connected to the seat lower bracket, wherein the distal end of the seat cross bracket is rotationally connected to the frame, and when the seat cross bracket 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 can be suspended, and the seat and the seat lower bracket together constitute the same flipping force arm.

[0009] Furthermore, the frame is fixedly provided with a vertical fixing ear, the vertical fixing ear 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 support is rotatably connected to the frame via a vertical fixing pin.

[0011] Furthermore, the rear wheel assembly includes a rear wheel fixing frame connected to the seat bracket by bolts and a rear wheel rotating on the fixing frame.

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

[0013] Furthermore, the track assembly includes a track, a track tensioning wheel, a tensioning rod, a track roller, a track bracket and a track bearing seat.

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

[0015] Furthermore, the track bracket is provided with a track support shaft sleeve and a track support shaft slidingly matched with the track support shaft sleeve.

[0016] Furthermore, it also includes a pitch adjuster, which includes a screw shaft sleeve fixed on the crawler support shaft sleeve and a reciprocating screw threadedly connected to the screw shaft sleeve, and the reciprocating screw is slidably connected to the crawler support through a screw fixing plate.

[0017] The second aspect of the present invention is achieved through the following technical solutions:

[0018] A distance adjustment method for a lightweight distance-adjustable chassis as described above, characterized in that:

[0019] S1: Release the seat, the rear wheels touch the ground to form support, use the touch point as a fulcrum, and use the seat and the bracket under the seat as a lever to press the seat, so that the track is suspended;

[0020] S2: Rotate the reciprocating screw rod, the crawler support sleeve slides along the crawler support sleeve, and the crawler drive shaft slides along the crawler bearing seat, so that the crawlers on both sides move away from or close to each other to reach a set distance;

[0021] SS: front wheel variable pitch.

[0022] The beneficial effects of the present invention are:

[0023] 1. For machinery using this chassis, when the weight borne by the crawler wheels is very large, the structure can still adjust the crawler and wheelbase on the spot more conveniently, using the chair as a lever and the wheels behind it as a fulcrum to support a large weight;

[0024] 2. For the terrain characteristics of hilly and mountainous areas, the terrain is complex, the roads are narrow and rugged, and the plots are small. The track wheel drive has better passing performance, and the triangular track is used to increase the chassis height and increase its obstacle crossing ability;

[0025] 3. The rear wheels are used as support to ensure that the crawler body is not damaged during the crawler pitch change process, and to avoid the crawler wear caused by friction between the crawler and the ground during the pitch change process, which may cause damage to the chassis mechanical structure;

[0026] 4. If the supporting strength of the wheels at the rear of the chair is not enough, they can be replaced with stronger solid wheels or iron wheels to enhance their supporting strength.

[0027] In summary, the invention enables the machine with the chassis to adjust the wheelbase at any position and at any time through a specific structural design, adapting to the use of complex shapes and enhancing adaptability. In addition, during operation, the rear wheel contact point is used as a fulcrum, and the seat and the under-seat bracket are used as a lever to press the seat. The seat and the under-seat bracket together form the same flip arm, making the variable distance operation of the mechanism extremely labor-saving, and significantly improving the convenience and efficiency of operation. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0030] Figure 3 It is a schematic diagram of the third direction of the present invention;

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

[0032] Figure 5 for Figure 4 Top view of the .

[0033] Description of reference numerals:

[0034] 1. Frame, 2. Track, 3. Track tensioner, 4. Tensioning rod, 5. Track roller, 6. Track bracket, 7. Track bearing seat, 8. Track drive shaft, 9. Screw handle, 10. Reciprocating screw, 11. Drive shaft sleeve, 12. Reducer, 13. Rear wheel fixing frame, 14. Rear wheel fixing hole, 15. Rear wheel hub, 16. Rear wheel, 17. Horizontal fixing pin, 18. Vertical fixing ear, 19. Seat Chair bracket, 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 bracket, 27. Upper vertical fixing pin, 28. Lower vertical fixing pin hole, 29. Track support shaft, 30. Track support shaft sleeve, 31. Screw fixing plate, 32. Screw nut, 33. Screw fixing plate, 34. Screw sleeve, 35. Transmission bearing seat. DETAILED DESCRIPTION

[0035] 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. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0036] 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 invention claimed for protection, but merely represents 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.

[0037] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[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 usually placed when in use, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply 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 limiting the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0039] In addition, the term "same" does not mean that the parts must be absolutely the same, but slight differences are allowed. The term "vertical" only means that the positional relationship between the parts is more vertical than "parallel", and does not mean that the structure must be completely vertical, but can be slightly tilted.

[0040] like Figures 1 to 5 As shown, a lightweight adjustable distance chassis of this embodiment does not exist independently, but is fixed together with a transplanter or other agricultural machinery to serve agricultural operations. In view of the problem that the ridge width required for planting in different regions is different, a variable distance chassis system is independently designed and developed. The variable distance system adopts a combination of round shaft and hexagonal shaft transmission, and combines the characteristics of the screw rod, and adopts a more reliable and labor-saving mechanism for variable distance operation, which is convenient, fast, time-saving and labor-saving, and can adjust the track spacing on the spot.

[0041] Specific structure: including 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 frame. The seat frame includes a seat lower frame 19 and a seat cross frame 26. A rear wheel assembly is arranged below the proximal end of the seat cross frame connected to the seat lower frame. The distal end of the seat cross frame is rotatably connected to the frame. When the seat is flipped relative to the frame, the rear wheel of the rear wheel assembly can just touch the ground to form support and make the track assembly suspended. The seat and the seat lower frame together constitute the same flipping force arm.

[0043] The drive assembly includes a reducer 12, a track drive shaft 8 and a track bearing seat 7. The reducer is fixed at the front end of the frame. The power is transmitted to the reducer by the reducer input shaft and output through the output shaft after deceleration. The end of the reducer output shaft is a drive sleeve 11, which is a round shaft on the outside and a hexagonal hole on the inside. The track drive shaft 8 is a hexagonal shaft that is nested with the drive sleeve 8 for power transmission. The track drive shaft 8 is supported by a drive bearing seat 35, and the drive bearing seat is fixed to the frame by bolts.

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

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

[0046] The frame is mainly supported by the track support sleeve 30. The track support sleeve 30 has 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 is nested with the track support sleeve 30 and is fixed by bolts on the outside of the sleeve when the pitch does not need to be changed.

[0047] The reciprocating screw 10 is fixed to the inner side of the track support 6 by bolts on the screw fixing plate 31 (both tracks have it), and the screw nut 32 is fixed on the screw fixing plate 31, and the screw nut 32 can move laterally along the reciprocating screw 10. The middle part of the reciprocating screw 10 is fixed under the track support sleeve 30 by the screw sleeve 34 and the screw fixing plate 33, and remains fixed, and the reciprocating screw can rotate therein.

[0048] The front wheel assembly includes a front wheel rod sleeve 22 fixed in front of the frame, the outer portion of which is a hexagonal shaft sleeve with a larger side length and the inner portion is a hexagonal through hole. The front wheel rod 21 and the front wheel rod sleeve 22 are nested and matched, and can move laterally. When the pitch change is not required, it is fixed by bolts.

[0049] The specific operation of pitch change 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, and the seat rotates downward around the frame along the upper vertical fixing pins 27;

[0051] Step 2: During the rotation of the seat, the rear wheel 16 contacts the ground. The rear wheel 16 is used as a fulcrum, and the seat and the bracket under the seat are used as levers to press the seat. The seat and the bracket under the seat together form the same flip arm to pry the two track wheels off the ground, and the pitch change operation is extremely labor-saving;

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

[0053] Step 4: Insert the screw handle 9 through the tool to rotate the reciprocating screw 10. Under the action of force, the screw nut 32 drives the screw fixing plate 33 and the integrated crawler assembly to move outward along the crawler support axis to a suitable width, that is, the crawler pitch change on one side is completed, and the reciprocating screw on the other side is rotated in the opposite direction to a suitable width, and the crawler pitch change on both sides is completed;

[0054] Step 5: Use bolts to fix the track fixing sleeve and the track fixing shaft, 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 fix 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 fix it, and the front wheel pitch change is completed.

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

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

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

[0059] 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 it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A lightweight adjustable-distance 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 comprises a seat and a seat bracket, the seat bracket comprises a seat lower bracket and a seat cross bracket vertically connected to the seat lower bracket, the rear wheel assembly is arranged below the proximal end of the seat cross bracket connected to the seat lower bracket, the distal end of the seat cross bracket is rotatably connected to the frame, and when the seat 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, and the seat and the seat lower bracket together constitute the same flipping force arm.

2. A lightweight adjustable distance chassis according to claim 1, characterized in that: The frame is fixedly provided with a vertical fixing ear, and the vertical fixing ear is provided with a pin hole. The lower end of the seat lower bracket is fixed to the frame by inserting a horizontal fixing pin into the pin hole.

3. A lightweight adjustable distance chassis according to claim 1, characterized in that: The seat cross bracket is rotatably connected to the frame via a vertical fixing pin.

4. A lightweight adjustable distance chassis according to claim 1, characterized in that: The rear wheel assembly comprises a rear wheel fixing frame connected to the seat bracket by bolts and a rear wheel rotating on the fixing frame.

5. The lightweight adjustable distance chassis according to claim 1, characterized in that: The front wheel assembly comprises a front wheel rod sleeve fixed to the frame, a front wheel rod slidingly matched with the front wheel rod sleeve, a front wheel frame fixed to the end of the front wheel rod, and a front wheel rotatably connected to the front wheel frame.

6. The lightweight adjustable distance chassis according to claim 1, characterized in that: The track assembly comprises a track, a track tensioning wheel, a tensioning rod, a track roller, a track bracket and a track bearing seat. The track is a triangular track, the track bracket is arranged in the triangular track, and the track bearing seat is fixed on the track bracket.

7. A lightweight adjustable distance chassis according to claim 6, characterized in that: The drive assembly includes a reducer, a track drive shaft and a track bearing seat. A drive sleeve is provided at the output end of the reducer. The track drive shaft is fixed to the frame through the drive bearing seat. The drive sleeve is provided with a hexagonal hole. The track drive shaft is a hexagonal shaft inserted into the hexagonal hole. The track bearing seat is provided with an adjustment hole that slides with the hexagonal shaft, and the hexagonal shaft passes through the adjustment hole and extends to both sides of the track.

8. The lightweight adjustable distance chassis according to claim 1, characterized in that: The crawler track bracket is provided with a crawler track support shaft sleeve and a crawler track support shaft which is slidably matched with the crawler track support shaft sleeve.

9. The lightweight adjustable distance chassis according to claim 1, characterized in that: It also includes a pitch adjuster, which includes a screw shaft sleeve fixed on the crawler support shaft sleeve and a reciprocating screw shaft threadedly connected to the screw shaft sleeve, and the reciprocating screw shaft is slidably connected to the crawler support through a screw shaft fixing plate.

10. A distance adjustment method for a lightweight distance-adjustable chassis according to any one of claims 1 to 9, characterized in that: S1: Release the seat, the rear wheels touch the ground to form support, use the touch point as a fulcrum, and use the seat and the bracket under the seat as a lever to press the seat, so that the track is suspended; S2: Rotate the reciprocating screw rod, the crawler support sleeve slides along the crawler support sleeve, and the crawler drive shaft slides along the crawler bearing seat, so that the crawlers on both sides move away from or close to each other to reach a set distance; SS: front wheel variable pitch.

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