Agricultural machine chassis and regenerative rice harvester with same

Abstract

The present application relates to a kind of agricultural machinery chassis and the regenerative rice harvester with it, including tracked vehicle, telescopic frame, two floating ground track wheel groups and driving mechanism, tracked vehicle includes engine, frame and the track drive wheel group being installed in the both sides of frame, engine is connected with the drive of both sides track drive wheel group, the width H of track drive wheel group is 70%~80% of the spacing of regenerative rice row;Fixed connecting piece is fixed on frame;The movable end of movable connecting piece is movably connected with fixed connecting piece;Two floating ground track wheel groups are spaced apart on the outside of two track drive wheel groups and are fixedly connected with the connecting end of movable connecting piece, and the width L of floating ground track wheel group is 70%~80% of the spacing of regenerative rice row.The present application provides an agricultural machinery chassis and the regenerative rice harvester with it, belongs to the technical field of agricultural machinery, increases the contact area with ground, reduces the pressure of tracked vehicle on ground, can make tracked vehicle walk operation in muddy field.

Description

TECHNICAL FIELD

[0001] The application relates to a regenerative rice harvester with a chassis. BACKGROUND

[0002] Currently, in the paddy field, plowing, fertilizing, spraying and harvesting, the self-propelled agricultural machine for harvesting regenerative rice all adopts a crawler-type walking chassis. The length and width of the crawler are designed according to the ground pressure of about 19 Kpa in the national standard. In the muddy field, the crawling depth is generally about 30 cm. However, once the plow field is deeper, the machine will sink into the mud and cannot be rescued, and needs to be pulled by an engineering machine such as a digger, which is time-consuming and causes loss.

[0003] The regenerative rice head season harvesting has a special requirement that the straw cannot be rolled. The existing technology adopts a special narrow crawler, the width of which is smaller than the plant row spacing. The width of the crawler is narrowed relatively, the ground pressure of the whole machine is increased during operation, the passing performance is seriously affected, and even the machine cannot work in the mud. Therefore, a chassis capable of increasing the contact area with the ground and not rolling the regenerative rice is urgently needed. SUMMARY

[0004] The technical problem to be solved by the application is to provide an agricultural machine chassis, which increases the contact area with the ground, reduces the ground pressure of the crawler vehicle, and enables the crawler vehicle to walk and work in the muddy field.

[0005] The technical scheme for solving the above technical problem is as follows: an agricultural machine chassis, comprising:

[0006] A crawler vehicle, the crawler vehicle comprises an engine, a vehicle frame and a crawler drive wheel group installed on both sides of the vehicle frame, the engine is fixed on the vehicle frame and is in transmission connection with the crawler drive wheel groups on both sides through a transmission assembly, the width H of the crawler drive wheel groups on both sides is 70-80% of the row spacing of the regenerative rice;

[0007] A fixed connecting piece, the fixed connecting piece is fixed on the vehicle frame;

[0008] A movable connecting piece, the movable end of the movable connecting piece is movably connected with the fixed connecting piece;

[0009] Two floating ground crawler wheel groups for increasing the stress area to prevent the crawler vehicle from sinking into the mud, the two floating ground crawler wheel groups are located outside the two crawler drive wheel groups and are fixedly connected with the connecting end of the movable connecting piece, the width L of the floating ground crawler wheel groups is 70-80% of the row spacing of the regenerative rice;

[0010] A driving mechanism is mounted on the frame and has a driving end fixed or hinged to the movable connecting member to drive the two ground floating crawler wheel sets to increase the force receiving area.

[0011] The application has the advantages that when transporting, the driving mechanism drives the ground floating crawler wheel sets close to the crawler driving wheel sets to reduce the vehicle width; when harvesting the ratoon rice, the driving mechanism drives the two ground floating crawler wheel sets away from the frame to roll against the ground, so that the ground floating crawler wheel sets are just located in the ratoon rice rows and roll against the ground, the ground floating crawler wheel sets increase the contact area with the ground, reduce the pressure of the crawler driving wheel sets on the field, prevent the crawler driving wheel sets from sinking into the soil, and also avoid crushing the ratoon rice.

[0012] Based on the above technical scheme, the application can be further improved as follows.

[0013] Further, the crawler driving wheel set comprises a fixed frame, a driving wheel, a second tensioning wheel, a plurality of second supporting wheels and a driving crawler belt, the fixed frame is fixed on the side of the frame, the driving wheel and the second tensioning wheel are rotationally connected to the two ends of the fixed frame along the front-rear direction of the crawler vehicle, the driving crawler belt is in transmission connection with the driving wheel and the second tensioning wheel, the engine is in transmission connection with the driving wheel through the transmission assembly, and the plurality of second supporting wheels are rotationally connected to the fixed frame to support the driving crawler belt.

[0014] Further, the fixed connecting member comprises a plurality of fixed pipes, the plurality of fixed pipes are vertically arranged and fixed on the frame in parallel, and the two ends of the plurality of fixed pipes are both arranged to pass through the fixed frame.

[0015] The movable connecting member comprises a plurality of sliding rods, and two sliding rods are slidingly connected in one fixed pipe.

[0016] The ground floating crawler wheel set comprises a supporting frame, two first tensioning wheels, a plurality of first supporting wheels and a ground floating crawler belt, the supporting frame is fixedly connected to the end of the sliding rod away from the fixed pipe, the two first tensioning wheels are rotationally connected to the two ends of the supporting frame along the front-rear direction of the crawler vehicle, the ground floating crawler belt is in transmission connection with the two first tensioning wheels, the plurality of first supporting wheels are rotationally connected to the supporting frame to support the ground floating crawler belt, and the driving end of the driving mechanism is fixedly connected to the supporting frame to drive the supporting frame away from or close to the frame.

[0017] The beneficial effect of the further scheme is that two sliding rods are slidingly connected in a fixed pipe, the two sliding rods slide in opposite directions, two support frames are located outside the two fixed frames and are fixed at one end of the sliding rods on the same side, so that the support frames can slide away from or close to the track drive wheel group, the drive mechanism can drive the support frames to close to or away from the track drive wheel group, when harvesting the ratoon rice, the drive mechanism drives the support frames to be away from the track drive wheel group, so that the floating ground track is located in the ratoon rice row, the floating ground tracks on both sides increase the overall contact area with the ground, reduce the ground pressure, prevent sinking into the soil, and after the work is completed, the drive mechanism drives the support frames to be close to the track drive wheel group, reducing the vehicle width, facilitating walking and transportation.

[0018] Further, the drive mechanism comprises two first hydraulic cylinders, the two first hydraulic cylinders are fixed on the vehicle frame in the sliding direction of the sliding rods and the telescopic rods are respectively fixedly connected with the support frames on both sides.

[0019] The beneficial effect of the further scheme is that the support frames are driven to move by the first hydraulic cylinders, the structure is simpler and more efficient.

[0020] Further, the fixed connecting piece comprises a plurality of fixed shafts, the plurality of fixed shafts are perpendicular to the forward direction and parallel to the vehicle frame, and both ends of the plurality of fixed shafts pass through the fixed frames correspondingly;

[0021] The movable connecting piece comprises two rotating connecting frames, the two rotating connecting frames are located outside the two fixed frames and are rotatably connected with the plurality of fixed shafts through a plurality of first hinged seats, and the two support frames are fixed on the two rotating connecting frames correspondingly, and the driving end of the drive mechanism is hinged with the support frames to drive the support frames to fold.

[0022] The beneficial effect of the further scheme is that during operation, the drive mechanism drives the rotating connecting piece to rotate, thereby driving the support frames to rotate, so that the floating ground track is parallel to and rolls against the ground, increasing the contact area with the ground and reducing the pressure; after the work is completed, the driving end of the drive mechanism drives the rotating connecting frame to rotate to fold the support frames, reducing the vehicle width.

[0023] Further, the drive mechanism comprises two second hydraulic cylinders, the cylinders of the two second hydraulic cylinders are hinged with the vehicle frame, the telescopic rods thereof are hinged with the two rotating connecting frames through two second hinged seats respectively to drive the support frames to fold.

[0024] Further, the bottom of the floating ground track is 50-100mm higher than the bottom of the driving track during harvesting operation.

[0025] The beneficial effect of the further scheme is that when the rice is not harvested, the driving cylinder drives the support frame to be close to the fixed frame when walking on the road, the width of the vehicle body is reduced, the height of the support frame is higher than the height of the fixed frame, the bottom of the floating ground track is higher than the bottom of the driving track, the floating ground track is not in contact with the road surface when driving on the flat road, the friction is reduced, and the fuel consumption is reduced.

[0026] Further, a plurality of protrusions for increasing friction are fixed on the driving track.

[0027] The beneficial effect of the further scheme is that when harvesting in a muddy field, the protrusions increase the friction with the field, increase the power in the field, especially in the mud, and prevent sinking in the mud.

[0028] The technical problem to be solved by the present application is to provide a rice harvester capable of zero-rolling harvesting of rice.

[0029] The technical scheme for solving the above technical problem is as follows: a rice harvester, comprising the agricultural machine chassis, further comprising a harvesting assembly, the harvesting assembly comprising a harvesting hopper, a harrowing assembly for raking the rice into the harvesting hopper, a cutting knife, and a conveying assembly, the harvesting hopper is open forward and installed at the front end of the vehicle frame, the harrowing assembly is rotatably connected to the harvesting hopper, the cutting knife is installed at the lower edge of the harvesting hopper, the rear end of the harvesting hopper is provided with a discharge port, and the conveying assembly is rotatably installed in the harvesting hopper to convey the rice to the discharge port; further comprising a threshing assembly, the threshing assembly comprising a threshing bin, a conveying roller, and a threshing assembly, the threshing bin is transversely installed on the vehicle frame, the threshing bin is provided with a discharge port and a feed port corresponding to the discharge port, the feed port and the discharge port are communicated through a conveying pipe, the conveying roller is rotatably connected in the conveying pipe for conveying the rice at the discharge port into the threshing bin, and the threshing assembly is rotatably connected in the threshing bin for threshing the rice panicles.

[0030] Further, it further comprises a cleaning mechanism and a hopper, the cleaning mechanism comprises a cleaning hopper, a sieve plate, a conveying assembly, and a vibrator, the cleaning hopper is installed on the vehicle frame and provided with a feed inlet at the top and a discharge outlet at the bottom, the sieve plate is arranged corresponding to the discharge outlet and connected with the cleaning hopper through an elastic connecting piece, the conveying assembly is installed on the vehicle frame and the input end corresponds to the discharge outlet, the output end corresponds to the sieve plate, and the vibrator is installed on the sieve plate; the hopper is installed on the vehicle frame and provided with a receiving port corresponding to the discharge outlet at the top and a discharge port at the bottom. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1It is a structural schematic view of the agricultural machine chassis of the present application;

[0032] Figure 2 It is a structural schematic view of the agricultural machine chassis without driving track and floating track of the present application;

[0033] Figure 3 It is a top view of the agricultural machine chassis of the present application; Figure 1

[0034] Figure 4 It is a structural schematic view of the regenerated rice harvester of the present application;

[0035] Figure 5 It is another structural schematic view of the agricultural machine chassis of the present application;

[0036] Figure 6 It is a structural schematic view of the agricultural machine chassis of the present application from another angle; Figure 5

[0037] Figure 7 It is another structural schematic view of the regenerated rice harvester of the present application;

[0038] Figure 8 It is a structural schematic view of the regenerated rice harvester of the present application from another angle. Figure 7

[0039] In the drawings, the components represented by each reference numeral are listed as follows:

[0040] 1-track vehicle, 101-engine, 102-vehicle frame, 103-track driving wheel set, 131-fixed frame, 132-driving wheel, 133-second tensioning wheel, 134-second supporting wheel, 135-driving track, 2-fixed pipe, 3-floating track wheel set, 31-supporting frame, 32-first tensioning wheel, 33-first supporting wheel, 34-floating track, 4-sliding rod, 5-first hydraulic cylinder, 6-fixed shaft, 7-rotary connecting frame, 71-connecting rod, 72-limiting block, 73-fixed rod, 8-second hinged seat, 9-second hydraulic cylinder, 10-protrusion, 11-harvesting assembly, 12-threshing assembly, 13-cleaning mechanism, 14-hopper, 15-limiting piece. DETAILED DESCRIPTION

[0041] The principles and features of the present application are described below in combination with the drawings, and the examples are only used to explain the present application, and are not used to limit the scope of the present application.

[0042] The purpose of the present application is to provide an agricultural machine chassis to solve the problems existing in the prior art, increase the contact area with the ground, reduce the pressure of the track vehicle on the ground, and enable the track vehicle to walk and work in the muddy field.

[0043] ​​​To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0044] This invention provides an agricultural machinery chassis, such as Figures 1 to 8 As shown, the system includes: a tracked vehicle 1, a fixed connector, a movable connector, two floating track wheel sets 3 to increase the contact area and prevent the tracked vehicle 1 from sinking into the mud, and a drive mechanism. The tracked vehicle 1 includes an engine 101, a frame 102, and track drive wheel sets 103 mounted on both sides of the frame 102. The engine 101 is fixed to the frame 102 and is connected to the track drive wheel sets 103 on both sides via a transmission assembly. The width H of the track drive wheel sets 103 on both sides is 70% of the row spacing of the regenerated rice. %~80%; the fixed connector is fixed on the frame 102; the movable end of the movable connector is movably connected to the fixed connector; the two floating track wheel sets 3 are spaced apart outside the two track drive wheel sets 103 and are fixedly connected to the connecting end of the movable connector, and the width L of the floating track wheel set 3 is 70%~80% of the spacing between the rows of regenerated rice; the drive mechanism is installed on the frame 102, and its drive end is fixed or hinged to the movable connector to drive the two floating track wheel sets 3 to abut against the ground to increase the force-bearing area.

[0045] The agricultural machinery chassis provided by this invention, when transporting non-operational purposes, drives the floating track wheel set 3 close to the track drive wheel set 103 to reduce the vehicle width. When harvesting ratooning rice, the drive mechanism drives the two floating track wheel sets 3 away from the frame 101, so that the floating track wheel sets 3 are located just within the rows of ratooning rice and roll against the ground. The floating track wheel sets 3 increase the contact area with the ground, reduce the pressure of the track drive wheel set 103 on the field, prevent the track drive wheel set 103 from sinking into the soil, and also avoid crushing the ratooning rice.

[0046] Preferably, the furthest gap between the floating track wheel set 3 and the track drive wheel set 103 is greater than 7cm to prevent crushing of the regenerated rice.

[0047] In a specific embodiment of the present invention, the track drive wheel assembly 103 includes a fixed frame 131, a drive wheel 132, a second tension wheel 133, a plurality of second support wheels 134, and a drive track 135. The fixed frame 131 is fixed to the side of the vehicle frame 102. The drive wheel 132 and the second tension wheel 133 are rotatably connected to the two ends of the fixed frame 131 in the front-rear direction of the tracked vehicle 1. The drive track 135 is drive-connected to the drive wheel 132 and the second tension wheel 133. The engine 101 is drive-connected to the drive wheel 132 through a transmission assembly. The plurality of second support wheels 134 are rotatably connected to the fixed frame 131 to support the drive track 135.

[0048] In an embodiment of the present application, the fixed connecting piece comprises a plurality of fixed pipes 2, the plurality of fixed pipes 2 are perpendicular to the forward direction and are fixed on the frame 102 in parallel, and both ends of the plurality of fixed pipes 2 correspond to pass through the fixed frame 131; the movable connecting piece comprises a plurality of sliding rods 4, two sliding rods 4 are slidingly connected in one fixed pipe 2; the float ground track wheel set 3 comprises a support frame 31, two first tensioning wheels 32, a plurality of first supporting wheels 33 and a float ground track 34, the support frame 31 is correspondingly fixedly connected to one end of the sliding rod 4 away from the fixed pipe 2, the two first tensioning wheels 32 are rotatably connected to both ends of the support frame 31 along the front and back direction of the track vehicle 1, the float ground track 34 is drivingly connected with the two first tensioning wheels 32, and the plurality of first supporting wheels 33 are rotatably connected to the support frame 31 and used for supporting the float ground track 34; and the driving end of the driving mechanism is fixedly connected with the support frame 31 to drive the support frame 31 away from or close to the frame 102.

[0049] The two sliding rods 4 are slidingly connected in one fixed pipe 2, the two sliding rods 4 slide in opposite directions, the two support frames 31 are located outside the two fixed frames 131 and are fixed to one end of the sliding rod 4 on the same side, so that the support frame 31 can be away from or close to the track driving wheel set 103 in a sliding manner, and the driving mechanism can drive the support frame 31 to be close to or away from the track driving wheel set 103; when the regenerated rice is harvested, the driving mechanism drives the support frame 31 to be away from the track driving wheel set 103, so that the float ground track 34 is located in the regenerated rice row, the float ground tracks 34 on both sides increase the overall contact area with the ground, reduce the ground pressure, and prevent sinking into the soil; after the work is completed, the driving mechanism drives the support frame 31 to be close to the track driving wheel set 103, so as to reduce the vehicle width and facilitate walking and transportation.

[0050] Preferably, the width L of the driving track 135 is 72% of the regenerated rice row spacing.

[0051] Preferably, the application further comprises two driving motors, the two driving motors are correspondingly installed on the two support frames 31 and are drivingly connected with the two first tensioning wheels 32 respectively, and can provide power for the float ground track 34.

[0052] Preferably, the float ground track 34 is provided with anti-skid patterns.

[0053] In an embodiment of the present application, the driving mechanism comprises two first hydraulic cylinders 5, the two first hydraulic cylinders 5 are fixed on the frame 102 along the sliding direction of the sliding rod 4 and the extension rods are fixedly connected with the support frames 31 on both sides.

[0054] The support frame 31 is driven to move by the first hydraulic cylinder 5, the structure is simpler, and the efficiency is high

[0055] In an embodiment of the present application, the fixed connecting piece comprises a plurality of fixed shafts 6, the plurality of fixed shafts 6 are perpendicular to the forward direction and are fixed on the frame 102 in parallel, and the two ends of the plurality of fixed shafts 6 pass through the fixed frame 131 correspondingly; the movable connecting piece comprises two rotating connecting frames, the two rotating connecting frames are located outside the two fixed frames 131 and are rotatably connected with the plurality of fixed shafts 6 through a plurality of first hinged seats, the two support frames 31 are fixed on the two rotating connecting frames correspondingly, and the driving end of the driving mechanism is hinged with the support frame 31 to drive the support frame 31 to fold.

[0056] During operation, the driving mechanism drives the rotating connecting piece to rotate, and then drives the support frame 31 to rotate, so that the floating ground track 34 is parallel to the ground and rolls against the ground, the contact area with the ground is increased, and the pressure is reduced; after the work is completed, the driving end of the driving mechanism drives the rotating connecting frame to rotate to fold the support frame 31, and the vehicle width is reduced.

[0057] In an embodiment of the present application, the driving mechanism comprises two second hydraulic cylinders 9, the cylinders of the two second hydraulic cylinders 9 are hinged with the frame 102, the telescopic rods of the two second hydraulic cylinders 9 are hinged with the two rotating connecting frames through two second hinged seats 8 respectively to drive the support frame 31 to fold.

[0058] Preferably, the two fixed shafts 6 are included, the rotating connecting piece 7 comprises two connecting rods 71, two limiting blocks 72 and a fixed rod 73, one end of the two connecting rods 71 is rotatably connected with one end of the fixed shaft 6 through the first hinged seat, the other end is fixedly connected with the support frame 31, the two limiting blocks 72 are fixed on the two connecting rods 71, the fixed shaft 6 is fixed with the limiting piece 15, the two limiting blocks 72 can rotate with the connecting rod 71 and abut against the limiting piece 15 to enable the floating ground track 34 to be parallel to the ground, the fixed rod 73 is fixed on the two connecting rods 71, and the hydraulic rod of the second hydraulic cylinder 9 is hinged with the fixed rod 73 to drive the connecting rod 71 to rotate.

[0059] In an embodiment of the present application, when the harvesting operation is performed, the bottom of the floating ground track 34 is 50-100mm higher than the bottom of the driving track 135.

[0060] When the regenerated rice does not need to be harvested, and when walking on the road, the driving cylinder drives the support frame 31 to be close to the fixed frame 131, the vehicle body width is reduced, the height of the support frame 31 is higher than the height of the fixed frame 131, so that the bottom of the floating ground track 34 is higher than the bottom of the driving track 135, the floating ground track 34 is ensured not to contact the road surface when driving on the flat road, the friction is reduced, and the fuel consumption is reduced.

[0061] In an embodiment of the present application, a plurality of protrusions 10 for increasing friction are fixed on the driving track 135.

[0062] When harvesting in muddy fields, the protrusion 10 increases the friction with the field, increasing the momentum of movement in the field, especially in mud, and preventing the plant from sinking into the mud.

[0063] The purpose of this invention is to provide a rice harvester for regenerated rice to solve the problems existing in the prior art and to achieve zero-compaction harvesting of regenerated rice.

[0064] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0065] This invention provides an agricultural machinery chassis, including a harvesting assembly 11. The harvesting assembly 11 includes a harvesting bucket, a harrowing assembly for harrowing ratooned rice into the harvesting bucket, a cutting blade, and a auger assembly. The harvesting bucket has its opening facing forward and is installed at the front end of the frame 102. The harrowing assembly is rotatably connected to the harvesting bucket. The cutting blade is installed on the lower edge of the harvesting bucket. A discharge port is opened at the rear end of the harvesting bucket. The auger assembly is rotatably installed inside the harvesting bucket to transport the ratooned rice to the discharge port. The invention also includes a threshing assembly 12, which includes a threshing bin, a conveying roller, and a threshing assembly. The threshing bin is horizontally installed on the frame 102. The threshing bin has a discharge port and a corresponding inlet port. The inlet port and the discharge port are connected through a conveying pipe. The conveying roller is rotatably connected inside the conveying pipe to transport the ratooned rice at the discharge port to the threshing bin. The threshing assembly is rotatably connected inside the threshing bin to thresh the rice ears of the ratooned rice.

[0066] In one specific embodiment of the present invention, a cleaning mechanism 13 and a hopper are also included. The cleaning mechanism 13 includes a cleaning hopper, a screen plate, a conveying assembly, and a vibrator. The cleaning hopper is mounted on a frame 102 and has an inlet at the top and a outlet at the bottom. The screen plate is arranged corresponding to the outlet and is connected to the cleaning hopper through an elastic connector. The conveying assembly is mounted on the frame 102 and has an input end corresponding to the discharge port and an output end corresponding to the screen plate. The vibrator is mounted on the screen plate. The hopper is mounted on the frame 102 and has a receiving port at the top corresponding to the outlet and a discharge port at the bottom.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An agricultural machinery chassis, characterized in that, include: Tracked vehicle (1), the tracked vehicle (1) includes an engine (101), a frame (102) and track drive wheel sets (103) mounted on both sides of the frame (102). The engine (101) is fixed on the frame (102) and is connected to the track drive wheel sets (103) on both sides through a transmission assembly. The width H of the track drive wheel sets (103) on both sides is 70% to 80% of the spacing between rows of regenerated rice. The track drive wheel assembly (103) includes a fixed frame (131), a drive wheel (132), a second tension wheel (133), a plurality of second support wheels (134), and a drive track (135). The fixed frame (131) is fixed to the side of the vehicle frame (102). The drive wheel (132) and the second tension wheel (133) are rotatably connected to the two ends of the fixed frame (131) along the front-rear direction of the tracked vehicle (1). The drive track (135) is drivenly connected to the drive wheel (132) and the second tension wheel (133). The engine (101) is drivenly connected to the drive wheel (132) through the transmission assembly. The plurality of second support wheels (134) are rotatably connected to the fixed frame (131) to support the drive track (135). A fixing connector is fixed to the frame (102); A movable connector, wherein the movable end of the movable connector is movably connected to the fixed connector; Two floating track wheel sets (3) are used to increase the force-bearing area and prevent the tracked vehicle (1) from sinking into the mud. The two floating track wheel sets (3) are spaced apart outside the two track drive wheel sets (103) and are fixedly connected to the connecting end of the movable connector. The width L of the floating track wheel set (3) is 70% to 80% of the spacing between the rows of regenerated rice. The drive mechanism is mounted on the frame (102), and its drive end is fixed or hinged to the movable connector to drive the two floating track wheel sets (3) to abut against the ground to increase the force-bearing area. The fixed connector includes multiple fixed tubes (2), which are fixed to the frame (102) perpendicular to the forward direction and parallel to it. Both ends of the multiple fixed tubes (2) pass through the fixed frame (131). The movable connector includes multiple sliding rods (4), and two of the sliding rods (4) are slidably connected in one of the fixed tubes (2); The floating track wheel assembly (3) includes a support frame (31), two first tension wheels (32), multiple first support wheels (33), and a floating track (34). The support frame (31) is fixedly connected to one end of the sliding rod (4) away from the fixed tube (2). The two first tension wheels (32) are rotatably connected to both ends of the support frame (31) along the front-rear direction of the tracked vehicle (1). The floating track (34) is drivenly connected to the two first tension wheels (32). The multiple first support wheels (33) are rotatably connected to the support frame (31) to support the floating track (34). The drive end of the drive mechanism is fixedly connected to the support frame (31) to drive the support frame (31) away from or close to the vehicle frame (102). During harvesting operations, the bottom of the floating track (34) is 50-100 mm higher than the bottom of the drive track (135); The furthest gap between the floating track wheel assembly (3) and the track drive wheel assembly (103) is greater than 7cm to prevent crushing of the regenerated rice.

2. The agricultural machinery chassis according to claim 1, characterized in that, The drive mechanism includes two first hydraulic cylinders (5), which are fixed on the frame (102) along the sliding direction of the sliding rod (4), and the telescopic rod is fixedly connected to the support frame (31) on both sides respectively.

3. The agricultural machinery chassis according to claim 1, characterized in that, The fixed connector includes multiple fixed shafts (6), which are fixed to the frame (102) perpendicular to the forward direction and parallel to it. Both ends of the multiple fixed shafts (6) pass through the fixed frame (131). The movable connector includes two rotating connecting frames (7), which are located outside the two fixed frames (131) and are rotatably connected to the fixed shafts (6) through multiple first hinge seats. The two support frames (31) are correspondingly fixed on the two rotating connecting frames (7). The driving end of the driving mechanism is hinged to the support frame (31) to drive the support frame (31) to fold.

4. The agricultural machinery chassis according to claim 3, characterized in that, The drive mechanism includes two second hydraulic cylinders (9), the cylinder barrels of the two second hydraulic cylinders (9) are hinged to the frame (102), and their telescopic rods are hinged to the two rotating connecting frames (7) respectively through two second hinge seats (8) to drive the support frame (31) to fold.

5. The agricultural machinery chassis according to claim 1, characterized in that, The drive track (135) is fixed with a plurality of protrusions (10) for increasing friction.

6. A rice harvester for regenerated rice, characterized in that, The agricultural machinery chassis includes any one of claims 1 to 5, and further includes a harvesting assembly (11), the harvesting assembly (11) including a harvesting bucket, a harrowing assembly for harrowing ratooned rice into the harvesting bucket, a cutting blade and a auger assembly, the harvesting bucket opening facing forward and installed at the front end of the frame (102), the harrowing assembly being rotatably connected to the harvesting bucket, the cutting blade being installed on the lower edge of the harvesting bucket, a discharge port being opened at the rear end of the harvesting bucket, and the auger assembly being rotatably installed inside the harvesting bucket to transport ratooned rice to the discharge port; It also includes a threshing assembly (12), which includes a threshing bin, a conveying roller and a threshing assembly. The threshing bin is horizontally mounted on the frame (102). The threshing bin has a discharge port and a feed port corresponding to the discharge port. The feed port and the discharge port are connected through a conveying pipe. The conveying roller is rotatably connected in the conveying pipe to convey the regenerated rice at the discharge port to the threshing bin. The threshing assembly is rotatably connected in the threshing bin to thresh the rice ears of the regenerated rice.

7. A rice harvester according to claim 6, further comprising a cleaning mechanism (13) and a hopper (14), wherein the cleaning mechanism (13) comprises a cleaning hopper, a screen plate, a conveying assembly and a vibrator, the cleaning hopper is mounted on a frame (102) and has an inlet at the top and a outlet at the bottom, the screen plate is arranged corresponding to the outlet and connected to the cleaning hopper by an elastic connector, the conveying assembly is mounted on the frame (102) and has an input end corresponding to the discharge port and an output end corresponding to the screen plate, and the vibrator is mounted on the screen plate; the hopper (14) is mounted on the frame (102) and has a receiving port at the top corresponding to the outlet and a discharge port at the bottom.

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