CN218473749U - Rice seedbed soil moisture dispersing machine - Google Patents

Abstract

The utility model discloses a soil moisture machine looses in rice seedbed belongs to the mechanized technical field of rice seedling, aims at providing a seedbed and prepares effectual, the operation is nimble, easy maintenance's soil moisture machine looses in seedbed. The crawler belt chassis comprises a walking crawler belt and a steering mechanism, wherein two rubber belts are arranged on the outer sides of a driving wheel set and a driven wheel set in a bilateral symmetry mode, chain plates are fixedly arranged on the surfaces of the two rubber belts at equal intervals to form a rubber plate combined crawler belt, the rubber plate combined crawler belt is sleeved on the driving wheel set and the driven wheel set through the front and back wrapping of the chain plates, a tension spring is arranged at the upper end of the support arm, and the front end of the tension spring is connected to a pull rod arranged on the bridge in a hanging mode. The utility model is suitable for a rice seedling bed preparation operation.

Description

Rice seedbed soil moisture dispersing machine

Technical Field

The utility model belongs to the technical field of the mechanized technique of rice seedling cultivation, especially, relate to a soil moisture machine is scattered to rice seedbed.

Background

Before rice seedling raising and seeding, the seedbed is prepared according to the agricultural requirements, and the state of soil crushing and leveling is achieved. Seedbed flattening generally relies on the manual work to hug with the rake, and artifical when good is hard, with high costs, inefficiency, this seedbed flattening mode bed soil compaction is more serious, can not guarantee effectual retaining soil moisture conservation, and one day is watered almost, must water for two days more, the water resource of wasting, serious even cause seedbed soil erosion and water loss. To above-mentioned problem, some adopt the ginseng loosening tiller to replace the manual work to carry out the seedbed hack flattening, this kind of ginseng loosening tiller adopts chain slat type walking track, and it is inflexible to rust the operation easily, and the structure is complicated, and it is inconvenient to maintain the dismantlement. Therefore, the problems of poor artificial seedbed preparation effect, poor reliability and inconvenient maintenance in the prior art exist.

Disclosure of Invention

The utility model aims at solving the problems and providing a rice seedbed moisture dispersing machine with good seedbed preparation effect, flexible operation and convenient maintenance.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model discloses a rice seedbed soil moisture dispersing machine, including crawler chassis and the crane span structure of setting on crawler chassis, the engine of setting on the crane span structure, the transmission case, cultivate roller and transmission system, this crawler chassis is including the walking track, steering mechanism, this walking track is by the drive wheel, the drive shaft, the tensioning extension spring, the driven shaft, from the driving wheel, the support arm, the driving shaft, the sticky tape, the link joint is constituteed, the driving shaft sets up below this crane span structure front side along horizontal roll, it constitutes driving wheel group to set up two drive wheels in the drive shaft, two this driving wheel group of bilateral symmetry pass through the drive shaft from both sides and the left and right sides both ends hookup of driving shaft, two left and right sides symmetries of support arm articulate on this crane span structure rear end both sides wall, the driven shaft is along horizontal setting at these two support arm lower extremes, this driven shaft both ends bilateral symmetry respectively sets up two driven wheel group respectively from the driving wheel group constitution driven wheel with rolling, this driving wheel group straight line corresponds around this driven wheel group, two sticky tape bilateral symmetry set up in this driving wheel group and this driving wheel group outside, two sticky tape equidistant solid link joint in the sticky tape combination track that constitutes the sticky tape combination track, this tension spring is on the front end of tensioning pull rod that sets up on this crane span structure.

As the preferred scheme of the utility model, the steering mechanism comprises a right swing arm, a left swing arm, an operating lever, a left connecting rod, a right connecting rod, an intermediate shaft, a swing shaft, a separation claw, a driving chain wheel, a main chain wheel, a middle chain wheel, a driven gear, a driving gear and a positioning claw, wherein the intermediate shaft and the swing shaft are arranged below the bridge frame in a way of rolling in parallel from front to back along the transverse direction, the intermediate shaft is positioned at the rear part of the driving shaft, the driving chain wheel, the main chain wheel and the middle chain wheel are positioned in the same vertical plane, the driving chain wheel is arranged on the driving shaft, the main chain wheel is arranged on a walking output shaft of the transmission case, the middle chain wheel is arranged on the intermediate shaft, the driving chain wheel, the main chain wheel and the middle chain wheel are hung and connected through the same chain, two driven gears are respectively arranged at the end of the driving shaft and are coaxial with the two driven gears in a left-right symmetry way, and the left symmetry is connected with the two ends of the driving shaft in an axial sliding way through splines, two driving gears are fixedly arranged at two ends of the intermediate shaft in a bilateral symmetry manner, two positioning claws are arranged on two side walls of the bridge in a bilateral symmetry manner, the two positioning claws are coaxially sleeved with the driving shaft, two separating claws are respectively combined with the two positioning claws to form separating pairs, the two separating claws are sleeved on the driving shaft in a rolling manner and are respectively attached to end surfaces of the two driven gears, when the separating claws are combined with the positioning claws, the driven gears are not meshed with the driving gears, when the separating claws are separated from the positioning claws, the separating claws axially press the driven gears to be meshed with the driving gears, a right swing arm and a left swing arm are fixedly arranged on the swing shaft, the left swing arm and the right swing arm are respectively provided with an arc-shaped long hole taking the swing shaft as the center, and the arc-shaped long holes of the left swing arm and the right swing arm are in a bilateral symmetry manner, the arc slot hole direction of this left swing arm is backward from the initial position, and the arc slot hole direction of this right swing arm is forward from the initial position, and left connecting rod front end is articulated with the separation claw that is located the left side of this crane span structure, and this left connecting rod rear end articulates on the initial position of this left swing arm arc slot hole with sliding, and right connecting rod front end is articulated with the separation claw that is located this crane span structure right side, and this right connecting rod rear end articulates on the initial position of this right swing arm arc slot hole with sliding, and this swing axle head sets up the control lever perpendicularly.

As the utility model discloses a preferred scheme, crane span structure front beam both ends set up the frame bedplate, and two this frame bedplate rear ends are articulated to be set up the support, the tilling roller sets up at two this support front ends with rolling, adorns the safety fence admittedly on two this supports, and the safety fence is rectangle gird shape, and this safety fence inclines to the below, this safety fence rear beam with set up elevating system between the driven shaft.

As a preferable scheme of the present invention, the tilling roller comprises a roller shaft and tilling knives, the tilling knives are diamond-shaped with a central hole, the roller shaft vertically passes through the central hole and is fixedly connected with the tilling knives, the tilling knives are axially arranged at equal intervals, and the angle between two adjacent tilling knives in the circumferential direction is 60 °.

As the utility model discloses an optimal scheme, elevating system comprises tail support, rack, gyro wheel, holder, center pin, positioning clamp, pressure spring, lock needle, handle, and the tail support is adorned admittedly on the driven shaft, and the rack lower extreme is articulated with this tail support, and the holder is adorned admittedly on the safety fence back beam, this rack straight line sets up in this holder slide with sliding, and the gyro wheel sets up on this holder and meshes with this rack through the center pin roll ground, and the positioning clamp is adorned admittedly on this holder, sets up the lock needle along this gyro wheel radial sliding on this positioning clamp, transversely sets up the handle on the lock needle, and this lock needle is along axial suit pressure spring, and this pressure spring is located between this handle and this positioning clamp back diaphragm, and this lock needle fore-tip stretches into locking braking between the adjacent two teeth of a cogwheel of this gyro wheel.

After the technical scheme is adopted, the utility model provides a rice seedbed looses soil moisture machine has beneficial effect to be:

1. the seedbed is good in conditioning effect. The utility model discloses a this safety fence rear frame member with set up elevating system between the driven shaft, the horizontal handle that sets up on the manual control elevating system lock needle, this lock needle front point overcome pressure spring pressure and remove the locking from the roll-off between two adjacent teeth of a cogwheel of this gyro wheel, and this safety fence rear frame member just can use the rack to go up and down along the height as the direction along with the holder, because the crane span structure front frame member both ends set up the frame bedplate, and two these frame bedplate rear ends are articulated to set up the support, the tilling roller sets up at two these support front ends with rolling, adorns the safety fence admittedly on two these supports, and like this, this safety fence rear frame member goes up and down and will make two these supports use its articulated shaft to swing from top to bottom as the center, and then realizes the regulation of tilling roller tilling depth of cultivation determines reasonable tilling according to seedbed soil condition, and tills the soil loose after-ploughs, and impounds the soil moisture conservation, avoids soil loss, obtains ideal seedbed soil flattening effect.

2. The operation is flexible. The utility model discloses a crawler chassis is equipped with steering mechanism, this steering mechanism's two left and right separation claws make up into the separation pair with these two locating claws respectively, manual control pole makes this oscillating axle forward or backward rotation in the operation, it swings forward or left swing arm backward to drive right swing arm, push forward or left connecting rod pull-back drives separation claw axial displacement through right connecting rod, roof pressure driven gear breaks away from the spline coupling with driving shaft right-hand member or left end, the driven gear who breaks away from the spline coupling and the epaxial driving gear meshing of jackshaft, make this driving wheel group counter-rotation drive of disengagement side, the walking track backward of disengagement side walks like this, the walking track forward of non-disengagement side walks, the nimble operation that turns to has been realized, more adapt to seedbed preparation operation.

3. The maintenance is convenient. The utility model discloses a slab rubber combination track, steering mechanism that crawler chassis adopted are the assembled scheme, simple structure, are convenient for install and maintain.

Drawings

FIG. 1 is a front view of the rice seedbed soil moisture dispersing machine of the present invention;

FIG. 2 is a top view of the rice seedbed soil moisture dispersing machine of the present invention;

FIG. 3 isbase:Sub>A cross-sectional view taken along line A-A of FIG. 1;

FIG. 4 is a cross-sectional view taken along line B-B of FIG. 3;

FIG. 5 is a cross-sectional view taken along line C-C of FIG. 3;

fig. 6 is a partial enlarged view of i in fig. 1.

In the figure: a drive wheel 1; a drive shaft 2; a right swing arm 3; a left swing arm 4; a joystick 5; tension spring 6 is tensioned; a driven shaft 7; a driven wheel 8; a support arm 9; an engine 10; a transmission case 11; a support 12; a safety fence 13; a tilling blade 14; a bridge frame 15; a left link 16; a right link 17; an intermediate shaft 18; a swing shaft 19; a separation claw 20; a drive sprocket 21; a main sprocket 22; an intermediate sprocket 23; a driven gear 24; a drive gear 25; a positioning pawl 26; a drive shaft 27; an adhesive tape 28; a link plate 29; a frame seat plate 30; a tail support 31; a rack 32; a roller 33; a holder 34; a central shaft 35; a positioning clip 36; a pressure spring 37; a lock pin 38; a handle 39.

Detailed Description

The invention will be described in further detail with reference to the following drawings and detailed description:

as shown in fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, the structural schematic diagram of the rice seedbed moisture dispersing machine of the present invention is provided, which comprises a crawler chassis and a bridge 15 disposed on the crawler chassis, an engine 10 disposed on the bridge 15, a transmission case 11, a tillage roller and a transmission system thereof, wherein the crawler chassis comprises a walking crawler and a steering mechanism, the walking crawler is composed of a driving wheel 1, a driving shaft 2, a tension spring 6, a driven shaft 7, a driven wheel 8, a support arm 9, a driving shaft 27, an adhesive tape 28, and a link plate 29, the driving shaft 27 is disposed at the front lower part of the bridge 15 along a transverse rolling manner, the driving shaft 2 is provided with two driving wheels 1 to form a driving wheel set, two driving wheel sets are laterally symmetrical and connected with the left and right ends of the driving wheel set through the driving shaft 2 from both sides and the left and right ends of the driving wheel set, two support arms 9 are laterally symmetrically hinged on the rear end side wall of the bridge 15, the driven shaft 7 is laterally disposed at the lower ends of the two support arms 9 along the transverse rolling manner, two driven wheels 8 respectively form a driven wheel set to form a driven wheel set, the driven wheel set respectively, the driven wheel set linearly corresponds to the front and rear end of the bridge, the tension spring, the two belt 28 and the upper end of the upper link plate 6 are symmetrically and the upper link plate 6 are disposed at the same side, the same side of the upper link plate, the upper link plate 6, the tension spring, the upper link plate 6 is disposed at the same side of the bridge.

As a preferred embodiment of the present invention, as shown in fig. 1, fig. 2, fig. 3, fig. 4, and fig. 5, the steering mechanism is composed of a right swing arm 3, a left swing arm 4, an operating lever 5, a left connecting rod 16, a right connecting rod 17, an intermediate shaft 18, a swing shaft 19, a separating claw 20, a driving sprocket 21, a main sprocket 22, an intermediate sprocket 23, a driven gear 24, a driving gear 25, and a positioning claw 26, the intermediate shaft 18 and the swing shaft 19 are disposed below the bridge 15 from front to back in a horizontal direction in parallel to each other, the intermediate shaft 18 is disposed behind the driving shaft 27, the driving sprocket 21, the main sprocket 22, and the intermediate sprocket 23 are disposed in the same vertical plane, the driving sprocket 21 is disposed on the driving shaft 27, the main sprocket 22 is disposed on the traveling output shaft of the transmission case 11, the intermediate sprocket 23 is disposed on the intermediate shaft 18, the driving sprocket 21, the main sprocket 22, and the intermediate sprocket 23 are engaged and transmitted through the same chain, two driven gears 24 are respectively arranged at the shaft ends of the driving shaft 2 and are coaxial with the shaft, the two driven gears 24 are bilaterally symmetrically connected with two ends of a driving shaft 27 in an axial sliding way through splines, two driving gears 25 are bilaterally symmetrically and fixedly arranged at two ends of the intermediate shaft 18, two positioning claws 26 are bilaterally symmetrically arranged on two side walls of the bridge frame 15, the two positioning claws 26 are sheathed with the driving shaft 27 in a coaxial way, two separating claws 20 are respectively combined with the two positioning claws 26 to form a separating pair, the two separating claws 20 are sheathed on the driving shaft 27 in a rolling way and are respectively attached to the end surfaces of the two driven gears 24, when the separating claws 20 are combined with the positioning claws 26, the driven gears 24 are not meshed with the driving gears 25, when the separating claws 20 are separated from the positioning claws 26, the separating claws 20 axially press the driven gears 24 to be separated from the driving shaft 27 through splines, meanwhile, the driven gear 24 is engaged with the driving gear 25, the swing shaft 19 is fixedly provided with a right swing arm 3 and a left swing arm 4, the left swing arm 4 and the right swing arm 3 are respectively provided with an arc-shaped long hole taking the swing shaft 19 as a center, the arc-shaped long hole of the left swing arm 4 and the start position of the arc-shaped long hole of the right swing arm 3 are bilaterally symmetrical, the arc-shaped long hole of the left swing arm 4 is backward from the start position, the arc-shaped long hole of the right swing arm 3 is forward from the start position, the front end of the left connecting rod 16 is hinged with the separating claw 20 positioned at the left side of the bridge frame 15, the rear end of the left connecting rod 16 is hinged on the start position of the arc-shaped long hole of the left swing arm 4 in a sliding manner, the front end of the right connecting rod 17 is hinged on the separating claw 20 positioned at the right side of the bridge frame 15, the rear end of the right connecting rod 17 is hinged on the start position of the arc-shaped long hole of the right swing arm 3 in a sliding manner, and the control lever 5 is vertically arranged at the end of the swing shaft 19.

As a preferred embodiment of the present invention, in fig. 1 and 2, frame seat plates 30 are disposed at two ends of a front beam of the bridge 15, a support 12 is hinged to a rear end of each of the frame seat plates 30, the tilling roller is rollingly disposed at front ends of the two supports 12, a safety fence 13 is fixedly mounted on the two supports 12, the safety fence 13 is in a rectangular ring beam shape, the safety fence 13 is inclined towards the front lower side, and a lifting mechanism is disposed between a rear beam of the safety fence 13 and the driven shaft 7.

As a preferred embodiment of the present invention, in fig. 1, 2 and 3, the tilling roller is composed of a roller shaft and tilling blades 14, the tilling blades 14 are in a diamond shape having a center hole, the roller shaft vertically passes through the center hole and is fixedly connected to the tilling blades 14, the tilling blades 14 are axially and equally spaced, and the angle between two adjacent tilling blades 14 is 60 ° in the circumferential direction.

As a preferred embodiment of the present invention, in fig. 1, fig. 2, fig. 3, and fig. 6, the lifting mechanism is composed of a tail support 31, a rack 32, a roller 33, a holder 34, a central shaft 35, a positioning clamp 36, a compression spring 37, a lock pin 38, and a handle 39, the tail support 31 is fixedly mounted on the driven shaft 7, the lower end of the rack 32 is hinged to the tail support 31, the holder 34 is fixedly mounted on the rear cross beam of the safety fence 13, the rack 32 is linearly slidably disposed in a slideway of the holder 34, the roller 33 is rollingly disposed on the holder 34 through the central shaft 35 and is engaged with the rack 32, the positioning clamp 36 is fixedly mounted on the holder 34, the lock pin 38 is radially slidably disposed along the roller 33 on the holder 36, the handle 39 is transversely disposed on the lock pin 38, the lock pin 38 is axially sleeved with the compression spring 37, the compression spring 37 is disposed between the handle 39 and the rear cross beam of the positioning clamp 36, and the front tip of the lock pin 38 extends into between two adjacent gear teeth of the roller 33 to lock the brake.

In practical application, the engine 10 is started, the engine 10 drives the transmission case 11 to operate, and the power output end of the transmission case 11 drives the tilling roller to rotate through a transmission system, so that the operation of soil crushing, soil moisture dispersing, leveling and seedbed preparation is completed; the walking output shaft of the transmission case 11 drives the driving shaft 27 and the intermediate shaft 18 to rotate forwards through the main chain wheel 22, the driving chain wheel 21 and the intermediate chain wheel 23, and the driving shaft 27 drives the driving wheel set to roll forwards through the driving shaft 2, so that the walking of the crawler chassis is realized.

In the operation process, when the rice seedbed soil moisture dispersing machine turns to the left, the manual control lever 5 enables the swinging shaft 19 to rotate backwards to drive the left swinging arm 4 to swing backwards, the left connecting rod 16 pulls backwards to drive the separating claw 20 to move axially, the top pressure driven gear 24 is separated from the spline connection with the left end of the driving shaft 27, the driven gear 24 separated from the spline connection is meshed with the driving gear 25 on the intermediate shaft 18, the driving wheel group on the left side is driven to rotate reversely, the walking track on the left side walks backwards, and the walking track on the right side walks forwards, so that the rapid and flexible left turning is realized.

In the operation process, when the rice seedbed moisture dispersing machine turns to the right, the swing shaft 19 is rotated forwards by the manual control lever 5 to drive the right swing arm 3 to swing forwards, the separation claw 20 is driven to move axially by pushing forwards the right connecting rod 17, the jacking driven gear 24 is separated from the spline connection with the right end of the driving shaft 27, the driven gear 24 separated from the spline connection is meshed with the driving gear 25 on the intermediate shaft 18, the driving wheel group on the right side is driven to rotate reversely, the walking crawler on the right side walks backwards, and the walking crawler on the left side walks forwards, so that the rapid and flexible right turning is realized.

During operation, when the tilling depth needs to be adjusted according to the soil condition of a seedbed, a handle 39 transversely arranged on a lock needle 38 of a lifting mechanism is manually controlled, the front tip of the lock needle 38 slides out from between two adjacent gear teeth of the roller 33 against the pressure of a pressure spring 37 to be unlocked, a rear cross beam of the safety fence 13 can lift along the height along with the clamping seat 34 by taking the rack 32 as a guide, and the rear cross beam of the safety fence 13 can lift so as to enable two brackets 12 to swing up and down by taking a hinged shaft thereof as a center, so that the tilling rollers arranged at the front ends of the two brackets 12 lift up and down, further, the tilling depth of the tilling rollers is adjusted, and an ideal soil breaking, soil moisture dispersing and leveling effect is obtained. The soil can be loosened effectively, the loosened soil can be effectively stored for preserving soil moisture, watering times are reduced, and water and soil loss is avoided.

The utility model is suitable for a rice seedling bed preparation operation.

Claims (6)

1. The utility model provides a soil moisture machine is scattered to rice seedbed, includes track chassis and crane span structure (15) of setting on track chassis, sets up engine (10), transmission case (11), cultivates roller and transmission system on crane span structure (15), its characterized in that: the crawler chassis comprises a walking crawler and a steering mechanism, wherein the walking crawler consists of a driving wheel (1), a driving shaft (2), a tension spring (6), a driven shaft (7), a driven wheel (8), support arms (9), a driving shaft (27), an adhesive tape (28) and chain plates (29), the driving shaft (27) is arranged below the front part of the bridge frame (15) in a transverse rolling manner, the driving shaft (2) is provided with two driving wheels (1) to form driving wheel sets, the two driving wheel sets which are bilaterally symmetrical are connected with the left end and the right end of the driving shaft (27) from two sides through the driving shaft (2), the two support arms (9) are bilaterally symmetrically hinged on two side walls at the rear end of the bridge frame (15), the driven shaft (7) is arranged at the lower ends of the two support arms (9) in the transverse direction, two driven wheels (8) are respectively arranged at the two ends of the driven shaft (7) in a bilateral symmetry rolling way to form a driven wheel group respectively, the driven wheel set is linearly corresponding to the driving wheel set on the same side in the front-back direction, the two adhesive tapes (28) are symmetrically arranged on the outer sides of the driving wheel set and the driven wheel set in the left-right direction, chain plates (29) are fixedly arranged on the surfaces of the two adhesive tapes (28) at equal intervals to form a rubber plate combined crawler belt, the rubber plate combined crawler belt is wrapped and sleeved on the driving wheel set and the driven wheel set through chain plates (29), the upper end of the supporting arm (9) is provided with a tension spring (6), and the front end of the tension spring (6) is hung on a pull rod arranged on the bridge frame (15).

2. The rice seedbed soil moisture dispersing machine as claimed in claim 1, wherein: the steering mechanism consists of a right swing arm (3), a left swing arm (4), an operating rod (5), a left connecting rod (16), a right connecting rod (17), an intermediate shaft (18), a swinging shaft (19), a separating claw (20), a driving chain wheel (21), a main chain wheel (22), an intermediate chain wheel (23), a driven gear (24), a driving gear (25) and a positioning claw (26), wherein the intermediate shaft (18) and the swinging shaft (19) are arranged below the bridge frame (15) from front to back along a transverse direction in a mutually parallel rolling manner, the intermediate shaft (18) is positioned behind the driving shaft (27), the driving chain wheel (21), the main chain wheel (22) and the intermediate chain wheel (23) are positioned in the same vertical plane, the driving chain wheel (21) is arranged on the driving shaft (27), the main chain wheel (22) is arranged on a walking output shaft of the transmission box (11), the intermediate chain wheel (23) is arranged on the intermediate shaft (18), the driving chain wheel (21), the main chain wheel (22) and the intermediate chain wheel (23) is in a hanging connection transmission mode through the same chain, two driven gears (24) are respectively arranged on the shaft ends of the driving shaft (2), and are symmetrically connected with the two ends of the driving shaft (18) through the two driving shaft ends of the two driving shaft (24) and the two driving shaft (27) and are axially and fixedly connected with the two driving gear (24) through the two driving shaft (24) in a coaxial line, two positioning claws (26) are symmetrically arranged on two side walls of the bridge frame (15) in a bilateral mode, the two positioning claws (26) are coaxially sleeved with the driving shaft (27), two separating claws (20) are respectively combined with the two positioning claws (26) to form a separating pair, the two separating claws (20) are sleeved on the driving shaft (27) in a rolling mode and are respectively attached to the end surfaces of the two driven gears (24), when the separating claws (20) are combined with the positioning claws (26), the driven gears (24) are not meshed with the driving gear (25), and when the separating claws (20) are separated from the positioning claws (26), the separating claws (20) axially press the driven gears (24) to be meshed with the driving gear (25), a right swing arm (3) and a left swing arm (4) are fixedly arranged on the swing shaft (19), the left swing arm (4) and the right swing arm (3) are respectively provided with an arc-shaped long hole taking the swing shaft (19) as the center, the arc-shaped long hole of the left swing arm (4) and the arc-shaped long hole of the right swing arm (3) are bilaterally symmetrical at the initial position, the arc-shaped long hole of the left swing arm (4) is backwards from the initial position, the arc-shaped long hole of the right swing arm (3) is forwards from the initial position, the front end of a left connecting rod (16) is hinged with a separating claw (20) positioned at the left side of the bridge frame (15), the rear end of the left connecting rod (16) is hinged on the initial position of the arc-shaped long hole of the left swing arm (4) in a sliding manner, the front end of a right connecting rod (17) is hinged with a separating claw (20) positioned on the right side of the bridge frame (15), the rear end of the right connecting rod (17) is hinged on the initial position of the arc-shaped long hole of the right swing arm (3) in a sliding way, and the end of a swing shaft (19) is vertically provided with an operating lever (5).

3. The rice seedbed soil moisture spreading machine as claimed in claim 1 or 2, wherein: frame seat boards (30) are arranged at two ends of a front beam of the bridge frame (15), supports (12) are hinged to the rear ends of the two frame seat boards (30), the tilling roller is arranged at the front ends of the two supports (12) in a rolling mode, safety fences (13) are fixedly arranged on the two supports (12), the safety fences (13) are rectangular ring beams, the safety fences (13) incline towards the front lower side, and a lifting mechanism is arranged between the rear beam of the safety fences (13) and the driven shaft (7).

4. The rice seedbed soil moisture spreading machine as claimed in claim 1 or 2, wherein: the tilling roller consists of a roller shaft and tilling knives (14), the tilling knives (14) are in a diamond shape provided with a central hole, the roller shaft vertically penetrates through the central hole to be fixedly connected with the tilling knives (14), the tilling knives (14) are arranged at equal intervals along the axial direction, and the angle of two adjacent tilling knives (14) along the circumferential direction is 60 degrees.

5. The rice seedbed soil moisture spreading machine as claimed in claim 3, wherein: the tilling roller consists of a roller shaft and tilling knives (14), the tilling knives (14) are in a diamond shape provided with a central hole, the roller shaft vertically penetrates through the central hole to be fixedly connected with the tilling knives (14), the tilling knives (14) are arranged at equal intervals along the axial direction, and the angle of two adjacent tilling knives (14) along the circumferential direction is 60 degrees.

6. The rice seedbed soil moisture dispersing machine as claimed in claim 3, wherein: the lifting mechanism is composed of a tail support (31), a rack (32), a roller (33), a clamping seat (34), a central shaft (35), a positioning clamp (36), a pressure spring (37), a lock needle (38) and a handle (39), wherein the tail support (31) is fixedly arranged on the driven shaft (7), the lower end of the rack (32) is hinged with the tail support (31), the clamping seat (34) is fixedly arranged on a rear cross beam of the safety fence (13), the rack (32) is linearly and slidably arranged in a slideway of the clamping seat (34), the roller (33) is arranged on the clamping seat (34) in a rolling mode through the central shaft (35) and is meshed with the rack (32), the positioning clamp (36) is fixedly arranged on the clamping seat (34), the lock needle (38) is radially and slidably arranged on the positioning clamp (36) along the roller (33), the handle (39) is transversely arranged on the lock needle (38), the lock needle (38) is axially sleeved with the pressure spring (37), the transverse plate (37) is positioned between the handle (39) and the rear end of the positioning clamp (36), and the lock needle (33) extends into a brake needle (33) between two adjacent brake needles (33).

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