A riding rice transplanter

Abstract

The invention relates to a riding rice transplanter, comprising a frame and a body arranged on the frame, a front axle transmission mechanism, a rear axle transmission mechanism, a gear operating mechanism, an engine, an integral hydraulic transmission device, a gearbox, a seedling platform control mechanism and a seedling platform assembly. The engine is transmitted to the gearbox through the integral hydraulic transmission device, and the gearbox drives the front axle transmission mechanism and the rear axle transmission mechanism. A seedling preparation bracket is also provided on the body. A structure for controlling the clutch and cut-off of a pulley, a structure for controlling the clutch and cut-off of a pulley and a travel control structure are also provided on the frame. The gearbox comprises a gearbox housing, and a planting power output shaft assembly, a travel power output shaft assembly, a half-shaft assembly, a speed-changing shaft assembly, a speed-changing shaft assembly, a speed-changing shaft assembly, a speed-changing shaft assembly and a speed-changing shaft assembly, all of which are arranged in the gearbox housing. The overall volume of the gearbox of the rice transplanter of the invention is relatively small, and it not only has a speed-changing function for traveling, but also can meet the requirements of four-wheel drive, and can also drive the movement of the planting mechanism.

Description

Technical Field

[0001] The invention relates to a rice transplanter in agricultural machinery, in particular to a riding type rice transplanter. Background Art

[0002] Rice transplanters are planting machines that plant rice seedlings in paddy fields. There are different types of rice transplanters. According to the state of the seedlings, they are divided into the type of pulling and washing seedlings, the type of seedlings with soil, and the dual-purpose type; according to the power, they are divided into two types: manual transplanters and motorized transplanters; according to the movement characteristics of the seedling separation and transplanting mechanisms, they can be divided into longitudinal rolling direct transplanting, longitudinal swing direct transplanting, and transverse swing direct transplanting; rice transplanters can be divided into walking rice transplanters, motorized rice transplanters, and high-speed rice transplanters. The composition of the planting parts of various transplanters is basically the same. The manual transplanter is composed of a seedling box, a seedling separation and transplanting mechanism, a frame, and a float, etc. The self-propelled motorized transplanter is also equipped with power drive, walking device, and seedling delivery mechanism. The basic working principle of the rice transplanter: the seedlings are neatly placed in the seedling box in a group state, and move horizontally with the seedling box, so that the seedling taker can take a certain number of seedlings one by one, and the seedlings are inserted into the soil according to the agronomic requirements under the control of the transplanting trajectory. The seedling taker then returns to the seedling box to take the seedlings along a certain trajectory. Although there are many types of rice transplanters, most rice transplanters have complex transmission mechanisms and unreliable operation. Summary of the invention

[0003] In order to solve the above technical problems, the object of the present invention is to provide a riding type rice transplanter, which has a compact transmission structure and reliable operation.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A riding rice transplanter comprises a frame and a vehicle body, a front axle transmission mechanism, a rear axle transmission mechanism, a gear operating mechanism, an engine, an integral hydraulic transmission device, a gearbox, a seedling platform control mechanism and a seedling platform assembly, wherein the engine is transmitted to the gearbox through the integral hydraulic transmission device, and the gearbox drives the front axle transmission mechanism and the rear axle transmission mechanism, the vehicle body is also provided with a seedling preparation bracket, the frame is also provided with a structure for controlling the clutch and disconnection of a pulley, a structure for controlling the clutch and disconnection of a pulley and a travel control structure, and the speed change The box includes a gearbox housing, and a planting power output shaft assembly, a travel power output shaft assembly, a half-shaft assembly, a speed-changing shaft assembly, a speed-changing shaft assembly, a speed-changing shaft assembly, a speed-changing shaft assembly, and a speed-changing shaft assembly. The speed-changing shaft assembly includes a shaft, a shaft travel gear fixed on the shaft, and a shaft planting one-way gear arranged on the shaft through a one-way bearing. The speed-changing shaft assembly includes two shafts, and a two-shaft speed-changing large gear, a two-shaft speed-changing small gear, a two-shaft travel gear, and a planting double gear, all of which are arranged on the two shafts. A speed change sleeve is also provided between the second-axis speed change gear and the second-axis speed change pinion, and the speed change sleeve is connected with a shift fork assembly. The speed change three-axis assembly includes three axes, three-axis spur gears all fixed on the three axes, and three-axis bevel gears. The speed change four-axis assembly includes four axes, and bevel gears and a second pitch gear fixed on the four axes. The half-axle assembly includes half-axles, and half-axle gears and a first pitch gear all fixed on the half-axles. The first axis and the second axis are driven by the meshing of the first axis running gear and the second axis speed change gear or the second axis speed change pinion. The second shaft and the third shaft are driven by the meshing of the second shaft travel gear and the third shaft spur gear. The third shaft is also provided with a differential assembly for connecting the front axle drive shaft, and the third shaft is driven by the meshing of the third shaft bevel gear and the travel power output shaft assembly. The first shaft planting one-way gear on the first shaft is meshed with the planting double gear on the second shaft, and the planting double gear on the second shaft is also meshed with the half shaft gear on the half shaft, thereby driving the half shaft to rotate. The half shaft and the fourth shaft are driven by the meshing of the first plant spacing gear and the second plant spacing gear. The fourth shaft drives the planting power output shaft assembly through the bevel gear.

[0006] As a preferred embodiment, the planting power output shaft assembly includes an external spline safety clutch disk, a safety clutch cover, a clutch shaft and an internal spline safety clutch disk. The external spline safety clutch disk is rotatably arranged in the gearbox housing through a bearing. One end of the external spline safety clutch disk is fixed with a power output bevel gear. The safety clutch cover is fixed on the gearbox housing. The clutch shaft is rotatably arranged in the gearbox housing through a bearing. The internal spline safety clutch disk is sleeved on one end of the clutch shaft. A gasket is also fixed on the clutch shaft. A clutch spring is arranged between the internal spline safety clutch disk and the gasket. The clutch spring presses the external spline safety clutch disk and the internal spline safety clutch disk tightly.

[0007] As a preferred embodiment, the frame includes a front frame and a rear frame connected by a gearbox, and the rear frame is a frame structure formed by enclosing and fixing four rear frame side panels, wherein the upper parts of two oppositely arranged rear frame side panels are respectively fixed with component mounting plates, and the tops of the two component mounting plates are provided with connecting cross beams, and a connecting pipe passes through the two oppositely arranged rear frame side panels, and pedals are fixed at both ends of the connecting pipe, and a supporting inclined plate is also provided between the pedals and the rear frame side panels, and the front frame includes two front frame side panels arranged parallel to each other, the front ends of the front frame side panels are fixed by connecting cross bars, the rear ends of the front frame side panels are fixed by connecting columns, and support plates are also fixed to the upper parts of the two front frame side panels.

[0008] As a preferred embodiment, the gear control mechanism includes a first operating lever, a second operating lever and a positioning device, the first operating lever is fixed to one end of the first connecting rod and is rotatably set on the frame through the first connecting rod, the other end of the first connecting rod is hinged to the second connecting rod connected to the gearbox through a transition plate, the positioning device includes a first positioning plate with a serrated upper end surface, the first positioning plate is rotatably set on the frame through a first rotating shaft, the middle part of the first positioning plate is folded to form a hinge plate, the second operating lever is rotatably set on one side of the first positioning plate through the hinge plate, a support plate is also fixed on the second operating lever, the support plate and the first positioning plate are connected by a first spring, so that the second operating lever is always close to the first positioning plate, and the lower part of the first positioning plate is hinged to a third connecting rod connected to the integral hydraulic transmission device.

[0009] As a preferred embodiment, the structure for controlling the clutch and cutting of the pulley includes a pedal connecting rod, a second rotating shaft, a first pull rod and a tensioning wheel, wherein a first pedal is fixed to one end of the pedal connecting rod, and the other end of the pedal connecting rod is bent and rotatably set on the frame, a transmission plate is fixed on the bent section of the pedal connecting rod, a second spring is also provided between the transmission plate and the frame, and the transmission plate is hinged to one end of the first pull rod, the second rotating shaft is rotatably set on the frame, and one end of the second rotating shaft is bent and connected to the other end of the first pull rod through a connecting block, the other end of the second rotating shaft is bent, and a tensioning wheel for resisting against the belt mounted between the output shaft wheel of the engine and the input shaft wheel of the integral hydraulic transmission device is provided on the bent section of the second rotating shaft, and a reset torsion spring for resetting the second rotating shaft is provided on the middle section of the second rotating shaft.

[0010] As a preferred embodiment, the walking control structure includes a front frame, an armrest frame, a second pull rod, a locking rod, a steering wheel and a steering gear turntable. The steering wheel is connected to the steering gear fixed on the front frame through a steering wheel shaft, and drives the steering gear turntable to rotate. A locking notch is also provided in the middle of the front end of the steering gear turntable. The locking rod is L-shaped, and the longer section is rotatably arranged at the lower part of the front frame. The shorter section is engaged with the locking notch or disengaged from the locking notch as the longer section rotates. The armrest frame is hinged at the front end of the front frame, and one side of the armrest frame is hinged to one end of the second pull rod, and the other end of the second pull rod is fixedly connected to the longer section of the locking rod.

[0011] As a preferred embodiment, the seedling platform control mechanism includes a wire drawing and releasing structure of a line marker, which includes an operating handle, a second positioning plate, a pull plate, a limit hook plate, a wire drawing transmission plate, a hydraulic cylinder, a seedling platform frame and a control valve. The second positioning plate is rotatably arranged on the frame, and the operating handle is rotatably arranged on one side of the second positioning plate. The operating handle is L-shaped, and a handle is fixed at one end, and a bent hook is formed at the other end. The pull plate is slidably arranged on the frame, and a first notch and a second notch are respectively provided at both ends of the pull plate. The bent hook of the operating handle is clamped in the first notch of the pull plate, driving the pull plate to slide, and the two side walls of the second notch of the pull plate are divided into The limit hook plate is respectively abutted against the side walls of the two limit hook plates, and the limit hook plate is set on the frame by rotating through a short axis. A hook portion is provided at one end of the limit hook plate, and a wire transmission plate connected to the scriber wire is hinged on the frame and set in a sliding groove of the frame. The hook portion of the limit hook plate is abutted against the wire transmission plate, and a reset column is also fixed to the lower part of the wire transmission plate. The control valve is fixed on the frame and connected to the hydraulic cylinder through a pipeline. The piston rod of the hydraulic cylinder is connected to the seedling stand frame, and a reset cross bar is provided on the seedling stand frame. When the seedling stand frame rises, the reset cross bar pushes the reset column, so that the wire transmission plate is clamped by the limit hook plate again when it retreats.

[0012] As a preferred embodiment, the seedling platform assembly includes a transverse transfer box, which includes a bracket, a transverse transfer box shell fixed on the bracket, and a power input shaft, a power transmission shaft, a transverse transfer box drive shaft and a screw shaft all of which are rotatably arranged in the transverse transfer box shell through bearings. The power input shaft and the power transmission shaft are meshed with bevel gears. A second transverse transmission gear is also provided at one end of the power transmission shaft, and a first transverse transmission gear is provided at one end of the screw shaft. The power transmission shaft and the screw shaft are meshed with the second transverse transmission gear and the first transverse transmission gear. A guide groove is provided on the screw shaft, and a slider is provided in the guide groove. The slider reciprocates with the rotation of the screw shaft, and a guide column is also provided on the slider.

[0013] As a preferred solution, the front axle transmission mechanism includes a front axle crossbeam, a housing support sleeve, a front wheel axle, a front axle drive shaft and a front axle bevel gear shaft, the front axle drive shaft and the front axle bevel gear shaft are arranged in the front axle crossbeam through a first bearing, one end of the front axle drive shaft is fixed with a front axle driving bevel gear, and both ends of the front axle bevel gear shaft are fixed with front axle driven bevel gears, the front axle drive shaft and the front axle bevel gear shaft are meshed and driven by the front axle driving bevel gear and the front axle driven bevel gear; the housing support sleeve is arranged at the lower part of the front axle bevel gear shaft through a connecting bearing sleeve, the lower part of the housing support sleeve is a front axle bearing shell, the front axle bearing shell is fixed with a front axle bearing cover by bolts, the front wheel axle is arranged in the front axle bearing shell and the front axle bearing cover through a second bearing, a dustproof oil seal is also provided between the front wheel axle and the front axle bearing cover, the front wheel axle is fixed with a front wheel axle bevel gear, and the front wheel axle bevel gear meshes and drives with the front axle driven bevel gear at the other end of the front axle bevel gear shaft.

[0014] As a preferred solution, the rear axle transmission mechanism includes an intermediate gear box and a rear axle side transmission box, the two ends of the intermediate gear box are respectively connected to the two rear axle side transmission boxes through a rear axle clutch, the rear axle side transmission box includes a rear axle bearing cover and a rear axle bearing shell fixed by bolts, the rear axle bearing cover and the rear axle bearing shell are also provided with a rear axle drive shaft, a rear axle bevel gear shaft and a rear wheel shaft through a third bearing, one end of the rear axle drive shaft is fixed with a rear axle drive bevel gear, both ends of the rear axle bevel gear shaft are fixed with rear axle driven bevel gears, the rear axle drive shaft and the rear axle bevel gear shaft are meshed and driven by the rear axle drive bevel gear and the rear axle driven bevel gear, a rear axle large bevel gear is fixed on the rear wheel shaft, and the rear wheel shaft and the rear axle bevel gear shaft are meshed and driven by the rear axle large bevel gear and the rear axle driven bevel gear.

[0015] The gearbox of the rice transplanter of the present invention adopts a multi-axis parallel setting, and the overall volume is small. Through the meshing transmission between gears, it not only has the speed change function of traveling, but also can meet the needs of four-wheel drive. The gearbox of the present invention can also drive the movement of the planting mechanism at the same time, and the transmission is reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an exploded schematic diagram of the overall structure of the rice transplanter of the present invention at one angle;

[0017] Figure 2 It is an exploded schematic diagram of the overall structure of the rice transplanter of the present invention from another angle;

[0018] Figure 3 It is a structural schematic diagram of the front axle transmission mechanism of the present invention;

[0019] Figure 4 It is a schematic cross-sectional structure diagram of the front axle transmission mechanism of the present invention;

[0020] Figure 5 for Figure 4 A partial enlarged view of part E;

[0021] Figure 6 It is a structural schematic diagram of the rear axle transmission mechanism of the present invention;

[0022] Figure 7 It is a schematic cross-sectional structure diagram of a side transmission box of the rear axle transmission mechanism of the present invention;

[0023] Figure 8 It is a structural schematic diagram of the gearbox of the present invention;

[0024] Fig. 9 for Figure 8 AA section view;

[0025] Fig.10 for Figure 8 BB cross-sectional view;

[0026] Fig.11 It is a schematic cross-sectional view of the safety clutch structure of the gearbox of the present invention;

[0027] Fig.12 It is a schematic diagram of the safety clutch structure of the gearbox of the present invention;

[0028] Fig.13 It is a cross-sectional schematic diagram of the brake structure of the gearbox of the present invention;

[0029] Fig.14 It is a schematic diagram of the brake structure of the gearbox of the present invention;

[0030] Fig.15 It is a schematic structural diagram of a one-way clutch of a gearbox of the present invention;

[0031] Fig.16 It is a transmission principle diagram of the gearbox of the present invention;

[0032] Fig.17 It is a schematic diagram of the plant spacing switching structure of the gearbox of the present invention;

[0033] Fig.18 It is a structural schematic diagram of a frame of the present invention at one angle;

[0034] Fig.19 It is a structural schematic diagram of the frame of the present invention from another angle;

[0035] Fig. 20 It is a structural schematic diagram of a seedling preparation support of the present invention at one angle;

[0036] Fig.21 It is a structural schematic diagram of the seedling preparation support of the present invention from another angle;

[0037] Fig. 22 It is a schematic diagram of the installation structure of the pulley clutch disconnection mechanism and the frame at an angle of the present invention;

[0038] Fig.23 It is a schematic diagram of the installation structure of the pulley clutch disconnection mechanism and the frame at another angle of the present invention;

[0039] Fig.24 It is a structural schematic diagram of a pulley clutch and cut-off mechanism of the present invention at one angle;

[0040] Fig.25 It is a structural schematic diagram of the pulley clutch and cut-off mechanism of the present invention from another angle;

[0041] Fig.26 It is a schematic diagram of the structure of the shift operating mechanism of the present invention from one angle;

[0042] Fig. 27 It is a schematic diagram of the structure of the shift operating mechanism of the present invention from another angle;

[0043] Fig.28 It is a schematic diagram of an angle of the front wheel straight-moving structure of the present invention;

[0044] Fig.29 is a schematic diagram of the front wheel straight-moving structure of the present invention from another angle;

[0045] Fig.30 It is a schematic diagram of the installation structure of the front wheel straight-moving structure and the frame at an angle of the present invention;

[0046] Fig.31 It is a schematic diagram of the installation structure of the front wheel straight-moving structure and the frame at another angle of the present invention;

[0047] Fig.32 A schematic diagram of a wire drawing and releasing structure of a line scriber according to the present invention at one angle;

[0048] Fig.33 A schematic diagram of the wire drawing and releasing structure of the line scriber of the present invention from another angle;

[0049] Fig.34 A schematic diagram of the wire drawing and releasing structure of the line scriber of the present invention from another angle;

[0050] Fig.35 A schematic diagram of the wire drawing and releasing structure of the line scriber of the present invention from another angle;

[0051] Fig.36 It is a schematic diagram of the exploded structure of the transverse transfer box of the present invention at one angle;

[0052] Fig.37 It is a schematic diagram of the exploded structure of the transverse transfer box of the present invention from another angle;

[0053] Fig.38 It is a schematic diagram of the overall structure of the transverse transfer box of the present invention at one angle;

[0054] Fig.39 This is a schematic diagram of the overall structure of the transverse transfer box from another angle of the present invention. DETAILED DESCRIPTION

[0055] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0056] like Figures 1 to 39 As shown, the present invention provides a riding rice transplanter, including a frame 2 and a body 1, a front axle transmission mechanism 9, a rear axle transmission mechanism 10, a gear operating mechanism 3, an engine 4, an integral hydraulic transmission device 5, a gearbox 6, a seedling platform control mechanism 7 and a seedling platform assembly 8, all of which are arranged on the frame 2. The engine 4 is transmitted to the gearbox 6 through the integral hydraulic transmission device 5, and the gearbox 6 drives the front axle transmission mechanism 9 and the rear axle transmission mechanism 10. The body is also provided with a seedling preparation bracket 11, and the frame is also provided with a structure for controlling the clutch and disconnection of the pulley, a structure for controlling the clutch and disconnection of the pulley, and a walking control structure.

[0057] The seedling preparation support 11 comprises a fixing rod 111, an L-shaped support plate 113 and a seedling frame 114, wherein a support rod 112 is vertically fixed to the top and the middle of the fixing rod respectively, and the two support rods 112 are arranged parallel to each other, and the two L-shaped support plates 113 are hinged at the two ends of the support rod 112 respectively, and the L-shaped support plate 113 is longer so that one side is folded inward to form a fixing plate, and the seedling frame is fixed on the fixing plates of the two L-shaped support plates 113; a connecting rod 115 is fixed at the bending part of the two L-shaped support plates 113, and a connecting rod 115 is also fixed to the front end of the two L-shaped support plates 113, and the two connecting rods 115 are parallel to each other; a plurality of long strip through holes 116 are distributed in a matrix on the seedling frame 114, and notches 117 are also arranged on both sides of the seedling frame 114 for facilitating the grabbing of the seedlings, and reinforcing ribs are also arranged between the long strip through holes 116 on the seedling frame 114; the fixing rod 111, the support rod 112 They are all hollow cylindrical shapes, the connecting rod is a solid cylindrical shape, and the L-shaped supporting plate 113 is a long strip plate shape.

[0058] The frame 2 includes a front frame 1201 and a rear frame 1202 connected by a gearbox 6. The rear frame 1202 is a frame structure formed by four rear frame side panels 201, wherein component mounting plates 202 are respectively fixed on the upper parts of two oppositely arranged rear frame side panels 201, and connecting cross beams 203 are arranged on the tops of the two component mounting plates 202. A connecting pipe 204 passes through the two oppositely arranged rear frame side panels 201, and pedals 205 are fixed at both ends of the connecting pipe 204. A supporting inclined plate 206 is also arranged between the pedals 205 and the rear frame side panels 201. The front frame 1201 includes two front frame side panels 207 arranged parallel to each other, the front ends of the front frame side panels 207 are fixed by connecting cross bars, the rear ends of the front frame side panels 207 are fixed by connecting columns 208, and support plates 209 are also fixed on the upper parts of the two front frame side panels 207.

[0059] The gear operating mechanism 3 includes a first operating lever 1301, a second operating lever 1305 and a positioning device, wherein the first operating lever 1301 is fixed to one end of the first connecting rod 1304 and is rotatably arranged on the frame 2 through the first connecting rod 1304, and the other end of the first connecting rod 1304 is hinged to the second connecting rod 1308 connected to the gearbox 6 through a transition plate, and the positioning device includes a first positioning plate 1306 with a serrated upper end surface, the first positioning plate 1306 is rotatably arranged on the frame through a first rotating shaft, the middle part of the first positioning plate 1306 is folded to form a hinge plate, the second operating lever 1305 is rotatably arranged on one side of the first positioning plate 1306 through the hinge plate, and a support plate 1302 is also fixed to the second operating lever 1305, and the support plate 1302 is connected to the first positioning plate 1306 through a first spring, so that the second operating lever 1305 is always oriented toward the first positioning plate 1306. The lower part of the first positioning plate 1306 is hinged with a third connecting rod 1307 connected to the integral hydraulic transmission device 5 .

[0060] A first positioning plate with a serrated upper end surface is fixed to the second operating lever. The serrated surface of the positioning plate forms a limit with the frame, and the gear shifting can be quantified according to the number of grids moved by the sawtooth, making the overall operation simpler. In addition, a spring is provided between the second operating lever and the positioning plate, so that the second operating lever is always close to the first positioning plate. When the second operating lever is in neutral, it can be stuck in the notch to maintain the limit and prevent misoperation.

[0061] The structure for controlling the clutch and disconnection of the pulley includes a pedal connecting rod 1203, a second rotating shaft 1205, a first pull rod 1204 and a tensioning wheel 1207, wherein a first pedal 1209 is fixed to one end of the pedal connecting rod 1203, and the other end of the pedal connecting rod 1203 is bent and rotatably arranged on the frame 2, a transmission plate 1210 is fixed to the bent section of the pedal connecting rod 1203, a second spring 1211 is further arranged between the transmission plate 1210 and the frame 2, and the transmission plate 1210 is hinged to one end of the first pull rod 1204, the second rotating shaft 1205 is rotatably arranged on the frame 2, and the second rotating shaft 1205 One end is bent and connected to the other end of the first pull rod 1204 through a connecting block 1208, the other end of the second rotating shaft 1205 is bent, and the bent section of the second rotating shaft 1205 is provided with a tensioning wheel 1207 for resting on the belt sleeved between the engine output shaft wheel and the input shaft wheel of the integral hydraulic transmission device 5, and a reset torsion spring 1206 is sleeved on the middle section of the second rotating shaft 1205 for resetting the second rotating shaft 1205.

[0062] By linking the pedal connecting rod with the tensioning wheel of the power transmission belt, when the brake pedal is stepped on, the tensioning wheel can be driven away from the belt between the engine output shaft wheel and the input shaft wheel of the integral hydraulic transmission device, causing the belt to slip, cutting off the power input, avoiding dry friction of various components, and making the overall system more reliable and safer.

[0063] The walking control structure includes a front frame 1201, an armrest 1501, a second pull rod 1502, a locking rod 1503, a steering wheel 1504 and a steering gear turntable 1506. The steering wheel 1504 is connected to the steering gear fixed on the front frame 1201 through a steering wheel shaft 1505, and drives the steering gear turntable 1506 to rotate. A locking notch is also provided in the middle of the front end of the steering gear turntable 1506. The locking rod 1503 is L-shaped, and the longer section is rotatably arranged at the lower part of the front frame 1201. The shorter section is stuck in the locking notch or disengaged from the locking notch as the longer section rotates. The armrest 1501 is hinged at the front end of the front frame 1201, and one side of the armrest 1501 is hinged to one end of the second pull rod 1502, and the other end of the second pull rod 1502 is fixedly connected to the longer section of the locking rod 1503.

[0064] A locking notch is provided on the steering gear turntable, and an armrest is provided at the front end of the front frame, and a locking rod is connected to the armrest. When the user needs to get off the vehicle and pull the rice transplanter by hand, the armrest is convenient for grabbing, and pressing the armrest downward can drive the locking rod to be inserted into the locking notch provided on the steering gear turntable, so that the steering gear cannot be easily rotated, thereby ensuring that the rice transplanter always moves forward and avoiding accidents.

[0065] Steering rods are hinged on both sides of the steering wheel 1506. The armrest frame 1501 is U-shaped as a whole and is made of a hollow round tube. A return spring is also sleeved on the second pull rod 1502. One end of the return spring is against the end of the locking rod, and the other end is against the positioning plate extending from the front frame.

[0066] The gearbox includes a gearbox housing 606, and a planting power output shaft assembly 605, a travel power output shaft assembly 607, a half-shaft assembly, a speed-changing shaft assembly, a speed-changing shaft assembly, a speed-changing shaft assembly, a speed-changing shaft assembly, and a speed-changing shaft assembly. The speed-changing shaft assembly includes a shaft 601, a shaft travel gear 6306 fixed on the shaft 601, and a shaft planting one-way gear 6304 arranged on the shaft 601 through a one-way bearing 6305. The speed-changing shaft assembly includes a shaft 602, and a shaft speed-changing large gear 6307, a shaft speed-changing small gear 6309, a shaft travel gear 6310, and a planting double gear 6311, all of which are arranged on the shaft 602. A speed-changing sleeve 6308 is also arranged between the shaft speed-changing large gear 6307 and the shaft speed-changing small gear 6309. The speed-changing sleeve 6308 is connected to a shift fork assembly 6025.

[0067] The speed-changing three-axis assembly includes three axes 603, three-axis spur gears 6203 and three-axis bevel gears 6205 fixed on the three axes 603; the speed-changing four-axis assembly includes four axes 604, bevel gears and a second pitch gear 6502 fixed on the four axes 604; the half-axle assembly includes half axes, half-axle gears 6302 and a first pitch gear 6501 fixed on the half axes;

[0068] The first shaft 601 and the second shaft 602 are driven by the meshing of the first shaft travel gear 6306 and the second shaft speed change gear 6307 or the second shaft speed change pinion 6309, and the second shaft 602 and the third shaft 603 are driven by the meshing of the second shaft travel gear 6310 and the third shaft spur gear 6203. The third shaft is also provided with a differential assembly 6206 for connecting the front axle drive shaft 908, and the third shaft is driven by the meshing of the third shaft bevel gear 6205 and the travel power output shaft assembly 607.

[0069] The one-shaft planting one-way gear 6304 on the one-shaft 601 is meshed with the planting double gear 6311 on the second shaft 602, and the planting double gear 6311 on the second shaft 602 is also meshed with the half-shaft gear 6302 on the half-shaft, thereby driving the half-shaft to rotate. The half-shaft and the four-shaft 604 are driven by the meshing transmission of the first plant spacing gear 6501 and the second plant spacing gear 6502. The four-shaft 604 drives the planting power output shaft assembly 605 through the bevel gear.

[0070] One shaft of the gearbox uses a one-way bearing to set a one-shaft planting one-way gear. Due to the one-way bearing, when one shaft rotates clockwise, it will drive the one-shaft planting one-way gear to rotate, and then drive the planting double gear to rotate. The planting double gear drives the half-shaft gear to rotate, and then drives the plant spacing gear to rotate. When one shaft rotates in the opposite direction, the one-shaft planting one-way gear will not rotate, protecting the transmission mechanism.

[0071] In the present invention, the four shafts and the half shafts that drive the planting mechanism are meshed and transmitted through the first plant spacing gear and the second plant spacing gear. The first plant spacing gear and the second plant spacing gear are both located outside the gearbox and are separately provided with protective covers. By removing the protective cover and replacing the first plant spacing gear and the second plant spacing gear with different gear ratios, the plant spacing can be switched. The present invention has a simple overall structure and is easy to operate.

[0072] The planting power output shaft assembly 605 includes an external spline safety clutch disk 611, a safety clutch cover 618, a clutch shaft 615 and an internal spline safety clutch disk 612. The external spline safety clutch disk 611 is rotatably arranged in the gearbox housing 606 through a bearing. A power output bevel gear 619 is fixed to one end of the external spline safety clutch disk 611. The safety clutch cover 618 is fixed to the gearbox housing 606. The clutch shaft 615 is rotatably arranged in the gearbox housing 606 through a bearing. The internal spline safety clutch disk 612 is sleeved on one end of the clutch shaft 615. A gasket 614 is also fixed to the clutch shaft 615. A clutch spring 613 is arranged between the internal spline safety clutch disk 612 and the gasket 614. The clutch spring 613 presses the external spline safety clutch disk 611 and the internal spline safety clutch disk 612 tightly.

[0073] The planting mechanism is driven by the connection between the outer spline safety clutch disc and the inner spline safety clutch disc. When the torque of the power output bevel gear exceeds the torque generated between the contact surfaces of the outer spline safety clutch disc and the inner spline safety clutch disc under the action of the safety clutch spring, the inner spline safety clutch disc moves backward and disengages from the outer spline safety clutch disc, and the power transmission is cut off, which can effectively prevent damage to the gearbox.

[0074] A slope surface is provided on the contact annular surface of the outer spline safety clutch disc 611 and the inner spline safety clutch disc 612. A third skeleton oil seal 616 is provided between the clutch shaft 615 and the safety clutch cover 618, and a semicircular shaft ring 617 is provided between the outer spline safety clutch disc 611 and the power output bevel gear 619.

[0075] A second oil-free bearing 6303 is provided between the side gear 6302 and the gearbox housing 606. The four-shaft 604 and the clutch shaft 615 are driven by the meshing of the bevel gear and the power output bevel gear 619.

[0076] The three-axis speed change assembly also includes a brake shaft 6207, a first brake shoe 6209, a second brake shoe 6211, and a brake pull plate 6212. The brake shaft 6207 is arranged in a gearbox housing through a bearing. The first brake shoe 6209 and the second brake shoe 6211 are respectively sleeved on the brake shaft 6207 through a first oil-free bearing 6210 and are located on both sides of the three-axis spur gear 6203. A brake pin shaft 6208 is also fixed on the side of the first brake shoe 6209 away from the three-axis spur gear 6203. The contact surface between the first brake shoe 6209 and the brake pin shaft 6208 forms a spiral cone surface. When the brake shaft 6207 rotates, the first brake shoe 6209 and the second brake shoe 6211 clamp the three-axis spur gear 6203. The brake pull plate 6212 is also fixed on the brake shaft 6207.

[0077] The gearbox uses two brake shoes to clamp the three-axis spur gear to achieve braking. When the brake pull plate is rotated, it drives the brake shaft and the brake pin shaft above it. The brake pin shaft moves along the spiral cone surface on the first brake shoe, pushing the first brake shoe to the right, thereby pressing the three-axis spur gear together with the second brake shoe, thereby achieving the braking effect. The overall structure is simple and the effect is better.

[0078] The gearbox housing 606 includes a left gearbox housing 6202 and a right gearbox housing 6201 fixed by bolts, and the travel power output shaft assembly 607 is transmitted to the power input shaft through the transmission shaft 608.

[0079] The seedling stand control mechanism 7 includes a marking device wire pulling and releasing structure, which includes an operating handle 1401, a second positioning plate 1411, a pulling plate 1402, a limit hook plate 1403, a wire pulling transmission plate 1404, a hydraulic cylinder 1406, a seedling stand frame 1407 and a control valve 1410. The second positioning plate 1411 is rotatably set on the frame, and the operating handle 1401 is rotatably set on one side of the second positioning plate 1411. The operating handle 1401 is L-shaped, and a handle is fixed at one end, and a bending hook is formed at the other end. The pulling plate 1402 is slidably set on the frame, and a first notch and a second notch are respectively provided at both ends of the pulling plate 1402. The bending of the operating handle 1401 The bent hook is stuck in the first notch of the pull plate 1402, driving the pull plate 1402 to slide, and the two side walls of the second notch of the pull plate 1402 are respectively against the side walls of the two limit hook plates 1403, and the limit hook plate 1403 is set on the frame through a short axis rotation, and one end of the limit hook plate 1403 is provided with a hook part, and the wire transmission plate 1404 connected to the wire of the scriber is hinged on the frame and set in the sliding groove of the frame, and the hook part of the limit hook plate 1403 is against the wire transmission plate 1404, and a reset column 1405 is also fixed at the lower part of the wire transmission plate 1404, and the control valve 1410 is fixed on the frame and connected to the hydraulic cylinder 1406 through the pipeline 1409. The piston rod of the hydraulic cylinder 1406 is connected to the seedling stand frame 1407, and a reset cross bar 1408 is provided on the seedling stand frame 1407. When the seedling stand frame 1407 rises, the reset cross bar 1408 pushes the reset column 1405, so that the wire transmission plate 1404 is stuck by the limit hook plate 1403 again when it retreats.

[0080] The pull plate is driven to slide by operating the hand lever, which in turn drives the limit hook plate to release the wire transmission plate, thereby releasing the marker, and the wire transmission plate is pushed to be caught by the limit hook plate again through the movement of the seedling stand frame. The overall structure is simple, the operation is reliable, and the operation is more convenient.

[0081] The second positioning plate 1411 is fan-shaped as a whole, and the arc edge is serrated. The side of the hook portion of the limit hook plate 1403 away from the wire pulling transmission plate 1404 is a guiding arc surface.

[0082] The seedling platform assembly 8 includes a transverse transfer box, which includes a bracket 1601, a transverse transfer box shell fixed on the bracket 1601, and a power input shaft 1610, a power transmission shaft, a transverse transfer box drive shaft 1609 and a screw shaft 1602, which are all rotatably arranged in the transverse transfer box shell through bearings. The power input shaft 1610 and the power transmission shaft are meshed with bevel gears. A second transverse transmission gear 1611 is also provided at one end of the power transmission shaft, and a first transverse transmission gear 1605 is provided at one end of the screw shaft 1602. The power transmission shaft and the screw shaft 1602 are meshed with each other through the second transverse transmission gear 1611 and the first transverse transmission gear 1605. A guide groove is provided on the screw shaft 1602, and a slider 1603 is arranged in the guide groove. The slider 1603 reciprocates with the rotation of the screw shaft 1602, and a guide column 1612 is also provided on the slider 1603.

[0083] The rotation of the screw shaft is achieved through the meshing transmission of the second transverse feed gear on the power transmission shaft and the first transverse feed gear on the screw shaft, so that the sliding block on the screw shaft can reciprocate, thereby driving the guide column to reciprocate. The structure of the present invention is relatively reliable, and the transverse feed speed can be changed by changing the tooth ratio of the second transverse feed gear to the first transverse feed gear, which is easy to operate.

[0084] The power transmission shaft and the lateral transfer box transmission shaft 1609 are driven by a transmission chain 1607. The screw shaft 1602 is also provided with a sheath 1604 on both sides of the guide column 1612. The lateral transfer box housing includes a first housing 1606 and a second housing 1608 fixed by bolts.

[0085] The front axle transmission mechanism includes a front axle cross beam 901, a housing support sleeve 902, a front wheel shaft, a front axle transmission shaft 908 and a front axle bevel gear shaft 911. The front axle transmission shaft 908 and the front axle bevel gear shaft 911 are arranged in the front axle cross beam 901 through a first bearing 913. A front axle driving bevel gear 909 is fixed to one end of the front axle transmission shaft 908, and a front axle driven bevel gear 910 is fixed to both ends of the front axle bevel gear shaft 911. The front axle transmission shaft 908 and the front axle bevel gear shaft 911 are driven by meshing the front axle driving bevel gear 909 with the front axle driven bevel gear 910. The support sleeve 902 is set on the lower part of the front axle bevel gear shaft 911 through the connecting bearing sleeve, and the lower part of the housing support sleeve is the front axle bearing shell 903, and the front axle bearing shell 903 is fixed with the front axle bearing cover 904 by bolts. The front wheel axle is set in the front axle bearing shell 903 and the front axle bearing cover 904 through the second bearing 916, and a dustproof oil seal 917 is also provided between the front wheel axle and the front axle bearing cover 904. A front wheel axle bevel gear 915 is fixed on the front wheel axle, and the front wheel axle bevel gear 915 is meshed with the front axle driven bevel gear 910 at the other end of the front axle bevel gear shaft 911 for transmission.

[0086] The front axle mechanism of the present invention adopts three transmission shafts through bearings, and the shafts are respectively driven by bevel gear meshing, so the connection is reliable and the stability is greater. In addition, the present invention uses a three-layer structure of an oil seal sleeve, a first skeleton oil seal and a dust seal at the rotation part of the shell, which effectively ensures the isolation of the inside of the shell from the external environment, thereby extending the service life of the front axle mechanism.

[0087] An oil seal sleeve 914 is also provided at the connection between the front axle cross beam 901 and the housing support sleeve 902 on the front axle bevel gear shaft 911, and a first skeleton oil seal 920 is provided on the outside of the oil seal sleeve 914. A dust seal 921 is also provided between the front axle cross beam 901 and the housing support sleeve 902. The front axle transmission mechanism also includes a front wheel mounting plate 905, which is fixed to the part of the front wheel shaft that passes through the front axle bearing cover 904. A steering pull plate 906 is also fixed to the outside of the housing support sleeve 902, and a retaining ring 918 is also provided on the upper part of the connecting bearing in the housing support sleeve 902. A flanged sealing cover 907 is also provided on the front axle cross beam 901, and a shaft sleeve 912 is also provided on the front axle bevel gear shaft 911.

[0088] The rear axle transmission mechanism includes an intermediate gear box 1001 and a rear axle side transmission box 1003. The two ends of the intermediate gear box 1001 are respectively connected to the two rear axle side transmission boxes 1003 through a rear axle clutch 1002. The rear axle side transmission box 1003 includes a rear axle bearing cover 1011 and a rear axle bearing shell 1012 fixed by bolts. The rear axle bearing cover 1011 and the rear axle bearing shell 1012 are also provided with a rear axle drive shaft, a rear axle bevel gear shaft 1007 and a rear wheel shaft 1014 through a third bearing 1009. A rear axle driving bevel gear 1008 is fixed to one end of the rear axle driving shaft, and rear axle driven bevel gears 1006 are fixed to both ends of the rear axle bevel gear shaft 1007. The rear axle driving shaft and the rear axle bevel gear shaft 1007 are driven by the meshing of the rear axle driving bevel gear 1008 and the rear axle driven bevel gear 1006. A rear axle large bevel gear 1013 is fixed to the rear wheel shaft 1014, and the rear wheel shaft 1014 and the rear axle bevel gear shaft 1007 are driven by the meshing of the rear axle large bevel gear 1013 and the rear axle driven bevel gear 1006.

[0089] The front axle mechanism of the present invention adopts three transmission shafts through bearings, and the shafts are respectively driven by bevel gear meshing, so the connection is reliable and the stability is better; in addition, the rear axle of the present invention is provided with a clutch between the two side transmission boxes to replace the differential, so the structure is simplified, the reliability is high, and the assembly is also relatively convenient.

[0090] The rear axle transmission mechanism further includes a rear wheel mounting plate 1015, which is fixed to the portion of the rear wheel shaft 1014 that passes through the rear axle bearing cover 1011. A second skeleton oil seal 1010 is also provided between the rear axle driving bevel gear 1008 and the rear axle bearing shell 1012. A sealing cover 1005 is also provided on the upper part of the rear axle bearing shell 1012, and a dustproof oil seal 1016 is also provided between the rear axle bearing cover 1011 and the rear wheel shaft 1014.

[0091] The above is only a preferred embodiment of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, which are also considered as the protection scope of the present invention.

Claims

1. A riding rice transplanter, comprising a frame (2) and a vehicle body (1) all arranged on the frame (2), a front axle transmission mechanism (9), a rear axle transmission mechanism (10), a gear operating mechanism (3), an engine (4), an integral hydraulic transmission device (5), a gearbox (6), a seedling platform control mechanism (7) and a seedling platform assembly (8), wherein the engine (4) is transmitted through the integral hydraulic transmission device (5) and the gearbox (6), and the gearbox (6) drives the front axle transmission mechanism (9) and the rear axle transmission mechanism (10), the vehicle body is further provided with a seedling preparation bracket (11), the frame (2) is further provided with a structure for controlling the clutch and disconnection of a pulley, a structure for controlling the clutch and disconnection of a pulley and a travel control structure, and the gearbox comprises a gearbox housing ( 606), and a planting power output shaft assembly (605), a travel power output shaft assembly (607), a half-shaft assembly, a speed-changing shaft assembly, a speed-changing shaft assembly, a speed-changing shaft assembly, a speed-changing shaft assembly, a speed-changing shaft assembly, and a speed-changing shaft assembly. The speed-changing shaft assembly includes a shaft (601), a shaft travel gear (6306) fixed on the shaft (601), and a shaft planting one-way gear (6304) arranged on the shaft (601) through a one-way bearing (6305). The speed-changing shaft assembly includes a shaft (602), a two-shaft speed-changing large gear (6307), a two-shaft speed-changing small gear (6309), a two-shaft travel gear (6310), and a planting double gear. (6311), a speed change sleeve (6308) is also provided between the second-axis speed change large gear (6307) and the second-axis speed change small gear (6309), and the speed change sleeve (6308) is connected with a shift fork assembly (6025), the speed change three-axis assembly includes three axes (603), three-axis spur gears (6203) all fixed on the three axes (603), and three-axis bevel gears (6205), the speed change four-axis assembly includes four axes (604), and bevel gears and a second pitch gear (6502) fixed on the four axes (604), the half-axle assembly includes half axes, and half-axle gears (6302) all fixed on the half axes, and a first pitch gear (6501), and the one axis (601) and the two axes (602) travel through the one axis The gear (6306) is meshed with the second-axis speed change gear (6307) or the second-axis speed change gear (6309), the second axis (602) and the third axis (603) are meshed with each other through the second-axis travel gear (6310) and the third axis spur gear (6203), the third axis is also provided with a differential assembly (6206) for connecting the front axle drive shaft (908), and the third axis is meshed with the travel power output shaft assembly (607) through the third axis bevel gear (6205), the first axis planting one-way gear (6304) on the first axis (601) is meshed with the planting double gear (6311) on the second axis (602), and the planting double gear (6311) on the second axis (602) is also meshed with the half-axis gear (6302) on the half-axis,Thereby driving the half shaft to rotate, the half shaft and the four-shaft (604) are driven by meshing of the first plant spacing gear (6501) and the second plant spacing gear (6502), and the four-shaft (604) drives the planting power output shaft assembly (605) through the bevel gear; The planting power output shaft assembly (605) comprises an external spline safety clutch disc (611), a safety clutch cover (618), a clutch shaft (615) and an internal spline safety clutch disc (612); the external spline safety clutch disc (611) is rotatably arranged in a gearbox housing (606) via a bearing; a power output bevel gear (619) is fixed to one end of the external spline safety clutch disc (611); the safety clutch cover (618) is fixed to the gearbox housing (606); The clutch shaft (615) is rotatably arranged in the gearbox housing (606) via a bearing, the inner spline safety clutch disc (612) is sleeved on one end of the clutch shaft (615), a gasket (614) is also fixed on the clutch shaft (615), a clutch spring (613) is arranged between the inner spline safety clutch disc (612) and the gasket (614), and the clutch spring (613) causes the outer spline safety clutch disc (611) to be pressed against the inner spline safety clutch disc (612); The gear operating mechanism (3) comprises a first operating lever (1301), a second operating lever (1305) and a positioning device, wherein the first operating lever (1301) is fixed to one end of a first connecting rod (1304) and is rotatably arranged on a vehicle frame (2) via the first connecting rod (1304), the other end of the first connecting rod (1304) is hingedly connected to a second connecting rod (1308) connected to a gearbox (6) via a transition plate, and the positioning device comprises a first positioning plate (1306) having a serrated upper end surface, the first positioning plate (1306) being rotatably arranged on the vehicle frame via a first rotating shaft, The middle part of the first positioning plate (1306) is folded to form a hinged plate, and the second operating rod (1305) is rotatably arranged on one side of the first positioning plate (1306) through the hinged plate. A support plate (1302) is also fixed on the second operating rod (1305), and the support plate (1302) is connected to the first positioning plate (1306) through a first spring, so that the second operating rod (1305) always moves closer to the first positioning plate (1306), and the lower part of the first positioning plate (1306) is hinged with a third connecting rod (1307) connected to the integral hydraulic transmission device (5); The structure for controlling the clutch and disconnection of the pulley comprises a pedal connecting rod (1203), a second rotating shaft (1205), a first pull rod (1204) and a tension wheel (1207), wherein a first pedal (1209) is fixed to one end of the pedal connecting rod (1203), and the other end of the pedal connecting rod (1203) is bent and then rotatably arranged on the frame (2), a transmission plate (1210) is fixed to the bent section of the pedal connecting rod (1203), a second spring (1211) is further arranged between the transmission plate (1210) and the frame (2), and the transmission plate (1210) and the first pull rod (1204) are connected to each other. ), the second rotating shaft (1205) is rotatably arranged on the frame (2), and one end of the second rotating shaft (1205) is bent and connected to the other end of the first pull rod (1204) through a connecting block (1208), the other end of the second rotating shaft (1205) is bent, and a tensioning wheel (1207) for supporting the belt mounted between the output shaft wheel of the engine and the input shaft wheel of the integral hydraulic transmission device (5) is provided on the bent section of the second rotating shaft (1205), and a reset torsion spring (1206) for resetting the second rotating shaft (1205) is provided on the middle section of the second rotating shaft (1205).

2. A riding rice transplanter according to claim 1, It is characterized in that The frame (2) comprises a front frame (1201) and a rear frame (1202) connected via a gearbox (6); the rear frame (1202) is a frame structure formed by four rear frame side panels (201) enclosed and fixed, wherein component mounting plates (202) are respectively fixed on the upper parts of two rear frame side panels (201) disposed opposite to each other, connecting crossbeams (203) are disposed on the tops of the two component mounting plates (202), and connecting pipes (204) penetrate the two rear frame side panels (201) disposed opposite to each other. , and footrests (205) are fixed at both ends of the connecting pipe (204), and a supporting inclined plate (206) is also provided between the footrest (205) and the rear frame side plate (201), and the front frame (1201) includes two front frame side plates (207) arranged parallel to each other, the front ends of the front frame side plates (207) are fixed by connecting cross bars, the rear ends of the front frame side plates (207) are fixed by connecting columns (208), and support plates (209) are also fixed to the upper parts of the two front frame side plates (207).

3. The riding rice transplanter according to claim 1, It is characterized in that The walking control structure comprises a front frame (1201), an armrest frame (1501), a second pull rod (1502), a locking rod (1503), a steering wheel (1504) and a steering gear turntable (1506). The steering wheel (1504) is connected to a steering gear fixed on the front frame (1201) through a steering wheel shaft (1505), and drives the steering gear turntable (1506) to rotate. A locking notch is also provided in the middle of the front end of the steering gear turntable (1506). The fixed rod (1503) is L-shaped, and the longer section is rotatably arranged at the lower part of the front frame (1201), and the shorter section is engaged with or disengaged from the locking notch as the longer section rotates. The handrail frame (1501) is hinged to the front end of the front frame (1201), and one side of the handrail frame (1501) is hinged to one end of the second pull rod (1502), and the other end of the second pull rod (1502) is fixedly connected to the longer section of the locking rod (1503).

4. The riding rice transplanter according to claim 1, It is characterized in that The seedling platform control mechanism (7) includes a marking device wire pulling and releasing structure, which includes an operating handle (1401), a second positioning plate (1411), a pulling plate (1402), a limit hook plate (1403), a wire pulling transmission plate (1404), a hydraulic cylinder (1406), a seedling platform frame (1407) and a control valve (1410), wherein the second positioning plate (1411) is rotatably arranged on the frame, and the operating handle (1401) is rotatably arranged on the second positioning plate (141 1), the operating handle bar (1401) is L-shaped, and a handle is fixed at one end, and a bent hook is formed at the other end. The pull plate (1402) is slidably arranged on the frame, and a first notch and a second notch are respectively arranged at both ends of the pull plate (1402). The bent hook of the operating handle bar (1401) is clamped in the first notch of the pull plate (1402), driving the pull plate (1402) to slide, and the two side walls of the second notch of the pull plate (1402) are respectively connected to the two limit hook plates. The side wall of the limit hook plate (1403) is abutted against each other, the limit hook plate (1403) is set on the frame through a short axis rotation, one end of the limit hook plate (1403) is provided with a hook portion, the wire transmission plate (1404) connected to the wire of the scriber is hinged on the frame and set in the sliding groove of the frame, the hook portion of the limit hook plate (1403) is abutted against the wire transmission plate (1404), and a reset column (1405) is also fixed at the lower part of the wire transmission plate (1404), the control The valve (1410) is fixed on the vehicle frame and connected to the hydraulic cylinder (1406) through a pipeline (1409). The piston rod of the hydraulic cylinder (1406) is connected to the seedling stand frame (1407), and a reset cross bar (1408) is provided on the seedling stand frame (1407). When the seedling stand frame (1407) rises, the reset cross bar (1408) pushes the reset column (1405), so that the wire transmission plate (1404) is stuck by the limit hook plate (1403) again when retreating.

5. The riding rice transplanter according to claim 1, It is characterized in that The seedling platform assembly (8) includes a transverse transfer box, which includes a bracket (1601), a transverse transfer box housing fixed to the bracket (1601), and a power input shaft (1610), a power transmission shaft, a transverse transfer box transmission shaft (1609) and a screw shaft (1602) all rotatably arranged in the transverse transfer box housing through bearings, the power input shaft (1610) and the power transmission shaft are meshed with bevel gears for transmission, and a second transverse transmission gear (1611) is also provided at one end of the power transmission shaft. A first transverse feeding gear (1605) is provided at one end of the screw shaft (1602); the power transmission shaft and the screw shaft (1602) are driven by meshing of the second transverse feeding gear (1611) and the first transverse feeding gear (1605); a guide groove is provided on the screw shaft (1602); a slider (1603) is arranged in the guide groove; the slider (1603) reciprocates as the screw shaft (1602) rotates; a guide column (1612) is also provided on the slider (1603).

6. The riding rice transplanter according to claim 1, It is characterized in that A front axle transmission mechanism comprises a front axle cross beam (901), a housing support sleeve (902), a front wheel shaft, a front axle transmission shaft (908) and a front axle bevel gear shaft (911); the front axle transmission shaft (908) and the front axle bevel gear shaft (911) are arranged in the front axle cross beam (901) via a first bearing (913); a front axle driving bevel gear (909) is fixed at one end of the front axle transmission shaft (908); front axle driven bevel gears (910) are fixed at both ends of the front axle bevel gear shaft (911); the front axle transmission shaft (908) and the front axle bevel gear shaft (911) are driven by meshing the front axle driving bevel gear (909) with the front axle driven bevel gear (910); The housing support sleeve (902) is arranged at the lower part of the front axle bevel gear shaft (911) through a connecting bearing sleeve, the lower part of the housing support sleeve is a front axle bearing shell (903), the front axle bearing shell (903) is fixed with a front axle bearing cover (904) by bolts, the front wheel shaft is arranged in the front axle bearing shell (903) and the front axle bearing cover (904) through a second bearing (916), a dustproof oil seal (917) is also arranged between the front wheel shaft and the front axle bearing cover (904), a front wheel shaft bevel gear (915) is fixed on the front wheel shaft, and the front wheel shaft bevel gear (915) is meshed with the front axle driven bevel gear (910) at the other end of the front axle bevel gear shaft (911) for transmission.

7. The riding rice transplanter according to claim 1, It is characterized in that A rear axle transmission mechanism comprises an intermediate gear box (1001) and a rear axle side transmission box (1003), wherein two ends of the intermediate gear box (1001) are respectively connected to two rear axle side transmission boxes (1003) via a rear axle clutch (1002), and the rear axle side transmission box (1003) comprises a rear axle bearing cover (1011) and a rear axle bearing shell (1012) fixed by bolts, and a rear axle drive shaft, a rear axle bevel gear shaft (1007) and a rear wheel shaft (1014) are also arranged in the rear axle bearing cover (1011) and the rear axle bearing shell (1012) via a third bearing (1009). A rear axle driving bevel gear (1008) is fixed at one end of the rear axle driving shaft, and rear axle driven bevel gears (1006) are fixed at both ends of the rear axle bevel gear shaft (1007). The rear axle driving shaft and the rear axle bevel gear shaft (1007) are driven by meshing of the rear axle driving bevel gear (1008) and the rear axle driven bevel gear (1006). A rear axle large bevel gear (1013) is fixed on the rear wheel shaft (1014), and the rear wheel shaft (1014) and the rear axle bevel gear shaft (1007) are driven by meshing of the rear axle large bevel gear (1013) and the rear axle driven bevel gear (1006).

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