Rice seed seedling raising device and method

Abstract

The invention relates to the technical field of rice planting, in particular to a rice seed seedling raising device and method.The rice seed seedling raising device is characterized in that a third transmission shaft, a second transmission shaft, a first transmission shaft and an inner connecting shaft are connected to the surface of one side of a vehicle body through bearings, a third gear, a seventh chain wheel and an eighth chain wheel are fixed to the third transmission shaft, and a second gear is fixed to the second transmission shaft; a first gear and a sixth chain wheel are fixed on the first transmission shaft, and a third chain wheel is fixed on the inner connecting shaft; the seedling raising device has the advantages that compared with common seedling raising devices in the market, connection between the inner connecting shaft and the outer connecting shaft can be cut off according to needs, and therefore the requirement that wheels rotate without sowing work is met.

Description

Technical Field

[0001] The invention relates to the technical field of rice planting, and in particular to a rice seed seedling raising device and method. Background Art

[0002] Rice cultivation is an extremely complex and delicate agricultural activity. Unlike many other crops, rice cultivation requires the careful cultivation of seedlings, which are then carefully inserted into rice fields.

[0003] The seedling raising devices currently on the market generally use the rotation of wheels to directly drive the feed shaft to rotate to achieve seed placement. However, in actual operation, it is often necessary to move the seedling raising device in order to adjust the position or perform other operations, but at the same time, it is not desired to plant seeds on the feed shaft due to the rotation of the wheels. This results in the existing seedling raising devices being unable to cope with this specific demand and being unable to meet the comprehensive requirements of both moving and pausing seeding, thus having certain limitations in function and flexibility.

[0004] To this end, the present invention provides a rice seed seedling raising device and method to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a rice seed seedling raising device and method to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a rice seed seedling raising device, the rice seed seedling raising device comprising: a vehicle body, a third transmission shaft, a second transmission shaft, a first transmission shaft and an inscribed shaft are connected on a surface of one side of the vehicle body through a bearing, a third gear, a seventh sprocket and an eighth sprocket are fixed on the third transmission shaft, a second gear is fixed on the second transmission shaft, a first gear and a sixth sprocket are fixed on the first transmission shaft, and a third sprocket is fixed on the inscribed shaft;

[0007] The inner shaft is rotatably connected with an outer shaft, the outer shaft is divided into two ends, the large end of the outer shaft is located inside the inner shaft, the small end of the outer shaft is located outside the inner shaft, and a fourth sprocket is fixed on the small end of the outer shaft;

[0008] An outer tube is fixed on the surface of the inscribed shaft, a through hole is opened on the surface of the inscribed shaft, the through hole runs through the inscribed shaft and the outer tube, a limit rod is slidably connected in the through hole, and a fixed plate is fixed on the end surface of the limit rod.

[0009] Preferably, a feeding cavity is provided on the upper surface of the vehicle body, and a discharging port is provided on the lower surface of the vehicle body, the feeding cavity and the discharging port are communicated with each other, a first discharging shaft and a second discharging shaft are provided inside the feeding cavity, both ends of the first discharging shaft and the second discharging shaft are rotatably connected to the vehicle body, one end of the first discharging shaft extends out of the vehicle body and a first sprocket is fixed at the end face, and one end of the second discharging shaft extends out of the vehicle body and a second sprocket is fixed at the end face.

[0010] Preferably, the seventh sprocket is arranged near the outermost end of the third transmission shaft, the third gear is arranged near the innermost end of the third transmission shaft, the eighth sprocket is located between the third gear and the seventh sprocket, the sixth sprocket is arranged near the outermost end of the first transmission shaft, and the first gear is arranged near the innermost end of the first transmission shaft.

[0011] Preferably, the first sprocket and the seventh sprocket are connected via the third sprocket, the seventh sprocket and the second sprocket are connected via the second chain, the sixth sprocket and the third sprocket are connected via the fourth chain, the third gear and the second gear are meshingly connected, and the first gear and the second gear are meshingly connected.

[0012] Preferably, a base, a front rotating shaft and a rear rotating shaft are provided under the vehicle body. The base is provided with four groups, and the four groups of bases are respectively arranged near the four ends of the lower surface of the vehicle body. The base is fixedly connected to the lower surface of the vehicle body by bolts, and the front rotating shaft is connected to the two groups of bases by bearings. Front wheels are fixed at both ends of the front rotating shaft, and a push handle is fixed on the surface of the vehicle body.

[0013] Preferably, the rear shaft is connected to the other two bases through bearings, rear wheels are fixed at both ends of the rear shaft, a fifth sprocket is fixed on the rear shaft, the fifth sprocket is located directly below the fourth sprocket, the fifth sprocket and the fourth sprocket are connected through a first chain, two sets of rear wheels and two sets of front wheels are located on both sides of the vehicle body, the two sets of front wheels are symmetrically distributed about the central axis of the vehicle body, and the two sets of rear wheels are symmetrically distributed about the central axis of the vehicle body.

[0014] Preferably, a baffle is fixed on the side of the vehicle body, the baffle is located next to the inscribed axis, the baffle is in the shape of a square plate, a through groove is provided on the surface of the baffle, the cross-section of the through groove is rectangular, the through groove penetrates the baffle, the central axis of the through groove is consistent with the central axis of the baffle, a locking groove is provided on the surface of the baffle, two groups of locking grooves are provided, the two groups of locking grooves are symmetrically distributed about the central axis of the through groove, the two groups of locking grooves are located on the upper and lower sides of the through groove, the locking grooves are connected to the through groove, and the locking grooves extend into half of the surface of the baffle.

[0015] Preferably, a spring is sleeved on the surface of the limit rod, and the spring is located between the solid disk and the epitaxial tube. One end of the spring is fixedly connected to the solid disk, and the other end of the spring is fixedly connected to the epitaxial tube. The surface of the solid disk is rotatably connected to an abutment rod, and a vertical plate is fixed at the end surface of the abutment rod. Both ends of the vertical plate are embedded in the lock groove, and the vertical plate can pass through the through groove.

[0016] Preferably, a limiting hole is opened on the surface of the circumscribed shaft, and there are several limiting holes, which are evenly distributed on the surface of the circumscribed shaft. The end face of the limiting rod is chamfered, and the end of the limiting hole is chamfered, and the limiting rod is inserted into the limiting hole.

[0017] A method for raising rice seedlings, comprising the following steps:

[0018] S1: When only the vehicle body needs to be moved, the operator rotates the abutment rod to set it horizontally and pulls it so that the abutment rod passes through the through slot and moves to the outside of the baffle. Then, the abutment rod is rotated to set it vertically. Both ends of the abutment rod will be embedded in the lock slot. During this process, the limit rod will be pulled out of the limit hole and finally enter the through hole. The spring is continuously stretched and stores elastic potential energy.

[0019] S2: Subsequently, the operator holds the push handle and applies force, and the vehicle body moves under the action of the rear shaft, the front shaft, the front wheel, the rear wheel and the base. When the vehicle body moves, the rear shaft rotates continuously, thereby driving the fifth sprocket to rotate synchronously. Under the transmission action of the first chain, the fourth sprocket is driven to rotate, and then the circumscribed shaft is driven to rotate as a whole. Since the circumscribed shaft and the inscribed shaft are connected by a bearing, the rotation of the circumscribed shaft does not drive the rotation of the inscribed shaft.

[0020] S3: When the vehicle body needs to be moved and sowing is carried out, the operator needs to pull the vertical plate and extract it from the locking groove until the vertical plate moves to the outside of the baffle, then rotate the vertical plate and set it horizontally, then cancel the pulling force on the vertical plate, and under the rebound action of the spring, the limit rod will move, and the limit rod will be inserted into the limit hole to realize the connection between the external shaft and the internal shaft;

[0021] S4: At this time, the operator holds the push handle and applies force, and the vehicle body moves under the action of the rear shaft, the front shaft, the front wheel, the rear wheel and the base. When the vehicle body moves, the rear shaft will continue to rotate, thereby driving the fifth sprocket to rotate synchronously, and under the transmission action of the first chain, the fourth sprocket will be driven to rotate, thereby driving the external shaft as a whole to rotate;

[0022] S5: Since the limiting rod is inserted into the limiting hole, the inner shaft and the outer shaft are connected, so that the outer shaft rotates, and then the third sprocket rotates. Subsequently, the first transmission shaft is driven to rotate under the transmission action of the fourth chain, and the third transmission shaft is driven to rotate under the meshing action of the first gear and the second gear and the meshing action of the second gear and the third gear, thereby driving the seventh sprocket and the eighth sprocket to rotate synchronously, and the first sprocket and the second sprocket are driven to rotate respectively under the transmission action of the third chain and the second chain, thereby driving the first discharge shaft and the second discharge shaft to rotate, so that the rice seeds inside the feeding chamber are sown to the bottom.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] A rice seed seedling raising device and method proposed in the present invention, compared with the common seedling raising devices on the market, can cut off the connection between the inner shaft and the outer shaft as needed, so that the vehicle body can only move without sowing when needed, or move and sow at the same time when needed. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of the present invention;

[0026] Figure 2 This is a detailed diagram of the vehicle body structure of the present invention;

[0027] Figure 3 It is a schematic diagram of the structure of the first chain, the third chain and the second chain of the present invention;

[0028] Figure 4 This is a schematic diagram of the structure of the inner and outer shafts of the present invention;

[0029] Figure 5 It is a schematic diagram of the structure of the first sprocket and the second sprocket of the present invention;

[0030] Figure 6 This is a schematic diagram of the internal structure of the inscribed shaft of the present invention;

[0031] Figure 7 This is a schematic diagram of the baffle structure of the present invention;

[0032] Figure 8 This is a schematic diagram of the sealing plate structure of the present invention;

[0033] Fig. 9 It is a detailed view of the side structure of the vehicle body of the present invention.

[0034] In the figure: 1, side frame; 2, front wheel; 3, rear wheel; 4, cover plate; 5, handle; 6, vehicle body; 7, push handle; 8, feeding chamber; 9, discharge port; 10, front rotating shaft; 11, rear rotating shaft; 12, base; 13, baffle plate; 14, support plate; 15, first chain; 16, guide rod; 17, third chain; 18, second chain; 19, first sprocket; 20, second sprocket; 21, third sprocket; 22, inner shaft; 23, outer shaft; 24, fourth sprocket; 25, fifth sprocket; 26, first transmission shaft; 27, The sixth sprocket; 28. the first gear; 29. ​​the second transmission shaft; 30. the second gear; 31. the third transmission shaft; 32. the seventh sprocket; 33. the eighth sprocket; 34. the third gear; 36. the extension tube; 37. the limit rod; 38. the fixed plate; 39. the abutment rod; 40. the vertical plate; 41. the spring; 42. the first feed shaft; 43. the second feed shaft; 44. the through hole; 46. the limit hole; 48. the locking groove; 49. the through groove; 51. the ferromagnetic strip; 52. the guide hole; 53. the outer groove; 54. the operating groove; 55. the fourth chain. DETAILED DESCRIPTION

[0035] For the purpose of simplicity and illustration, the principles of the embodiments are mainly described by reference to examples. In the following description, many specific details are proposed to provide a thorough understanding of the embodiments. However, it is obvious that for those of ordinary skill in the art, these embodiments may not be limited to these specific details in practice. In some instances, known methods and structures are not described in detail to avoid making these embodiments unnecessarily difficult to understand. In addition, all embodiments can be used in combination with each other.

[0036] Example 1: Please refer to Figures 1 to 9 The present invention provides a technical solution: a rice seed seedling raising device, comprising: a vehicle body 6, a third transmission shaft 31, a second transmission shaft 29, a first transmission shaft 26 and an inscribed shaft 22 are connected on one side surface of the vehicle body 6 through a bearing, a third gear 34, a seventh sprocket 32 ​​and an eighth sprocket 33 are fixed on the third transmission shaft 31, a second gear 30 is fixed on the second transmission shaft 29, a first gear 28 and a sixth sprocket 27 are fixed on the first transmission shaft 26, and a third sprocket 21 is fixed on the inscribed shaft 22;

[0037] The inner shaft 22 is rotatably connected with the outer shaft 23. The outer shaft 23 is divided into two ends, the large end of the outer shaft 23 is located inside the inner shaft 22, and the small end of the outer shaft 23 is located outside the inner shaft 22. A fourth sprocket 24 is fixed to the small end of the outer shaft 23.

[0038] An epitaxial tube 36 is fixed on the surface of the inscribed shaft 22, a through hole 44 is opened on the surface of the inscribed shaft 22, the through hole 44 penetrates the inscribed shaft 22 and the epitaxial tube 36, a limit rod 37 is slidably connected in the through hole 44, and a fixed plate 38 is fixed on the end surface of the limit rod 37. A rice seed seedling raising device and method, including the rice seed seedling raising device;

[0039] When in use, the transmission and conversion of power is achieved through the meshing transmission of the sprocket, chain and gear, so that the device can drive different components to work as needed, improving the flexibility and functionality of the vehicle body 6, so that it can better adapt to different operating requirements.

[0040] Embodiment 2: On the basis of embodiment 1, a feeding cavity 8 is provided on the upper surface of the vehicle body 6, and a discharging port 9 is provided on the lower surface of the vehicle body 6. The feeding cavity 8 and the discharging port 9 are communicated with each other. A first feeding shaft 42 and a second feeding shaft 43 are provided inside the feeding cavity 8. Both ends of the first feeding shaft 42 and the second feeding shaft 43 are rotatably connected to the vehicle body 6. One end of the first feeding shaft 42 extends out of the vehicle body 6 and a first sprocket 19 is fixed at the end surface. One end of the second feeding shaft 43 extends out of the vehicle body 6 and a second sprocket 20 is fixed at the end surface. The seventh sprocket 32 ​​is arranged close to the outermost end of the third transmission shaft 31, and the third gear 34 is close to the outermost end of the third transmission shaft 31. The eighth sprocket 33 is disposed near the innermost end of the third transmission shaft 31, the eighth sprocket 33 is located between the third gear 34 and the seventh sprocket 32, the sixth sprocket 27 is disposed near the outermost end of the first transmission shaft 26, the first gear 28 is disposed near the innermost end of the first transmission shaft 26, the first sprocket 19 and the seventh sprocket 32 ​​are connected via the third sprocket 21, the seventh sprocket 32 ​​and the second sprocket 20 are connected via the second chain 18, the sixth sprocket 27 and the third sprocket 21 are connected via the fourth chain 55, the third gear 34 is meshedly connected with the second gear 30, and the first first gear 28 is meshedly connected with the second gear 30;

[0041] When in use, the first feed shaft 42 and the second feed shaft 43 are connected to the transmission system through sprockets. When the external shaft 23 is connected to the internal shaft 22, the feed shafts can be driven to rotate to sow seeds from the feeding chamber 8 to the bottom.

[0042] Embodiment 3: On the basis of embodiment 2, a base 12, a front rotating shaft 10 and a rear rotating shaft 11 are provided below the vehicle body 6, and four groups of bases 12 are provided, and the four groups of bases 12 are respectively provided near the four ends of the lower surface of the vehicle body 6, and the base 12 is fixedly connected to the lower surface of the vehicle body 6 by bolts, and the front rotating shaft 10 is connected to two groups of bases 12 by bearings, and front wheels 2 are fixed at both ends of the front rotating shaft 10, and a push handle 7 is fixed on the surface of the vehicle body 6, and the rear rotating shaft 11 is connected to the other two bases 12 by bearings, and rear wheels 3 are fixed at both ends of the rear rotating shaft 11, and a fifth sprocket 25 is fixed on the rear rotating shaft 11, and the fifth sprocket 25 is located directly below the fourth sprocket 24, and the fifth sprocket 25 and the fourth sprocket 24 are connected by a first chain 15, and the two groups of rear wheels 3 and the two groups of front wheels 2 are located on both sides of the vehicle body 6, and the two groups of front wheels 2 are symmetrically distributed about the central axis of the vehicle body 6, and the two groups of rear wheels 3 are symmetrically distributed about the central axis of the vehicle body 6;

[0043] When in use, the vehicle body 6 serves as the basis of the entire device, and the vehicle body 6 carries all mechanical components. Through the arrangement of the wheels and the base 12, the device can be conveniently moved and positioned, and the vehicle body 6 can be easily moved by pushing the push handle 7.

[0044] A baffle 13 is fixed to the side of the vehicle body 6. The baffle 13 is located next to the inscribed shaft 22. The baffle 13 is in the shape of a square plate. A through slot 49 is provided on the surface of the baffle 13. The cross section of the through slot 49 is rectangular. The through slot 49 penetrates the baffle 13. The central axis of the through slot 49 is consistent with the central axis of the baffle 13. A locking slot 48 is provided on the surface of the baffle 13. The locking slot 48 is provided in two groups. The two groups of locking slots 48 are symmetrically distributed about the central axis of the through slot 49. The two groups of locking slots 48 are located on the upper and lower sides of the through slot 49. The locking slots 48 are connected to the through slot 49. The locking slots 48 extend into half of the surface of the baffle 13. The surface of the limit rod 37 is provided with a spring 41. The spring 41 is positioned Between the fixed plate 38 and the extension tube 36, one end of the spring 41 is fixedly connected to the fixed plate 38, and the other end of the spring 41 is fixedly connected to the extension tube 36. The surface of the fixed plate 38 is rotatably connected with an abutment rod 39, and a vertical plate 40 is fixed at the end surface of the abutment rod 39. Both ends of the vertical plate 40 are embedded in the locking groove 48. The vertical plate 40 can pass through the through groove 49. A limiting hole 46 is provided on the surface of the circumscribed shaft 23. A plurality of limiting holes 46 are provided, and the plurality of limiting holes 46 are equidistantly distributed on the surface of the circumscribed shaft 23. The end surface of the limiting rod 37 is chamfered, and the end of the limiting hole 46 is chamfered, and the limiting rod 37 is inserted into the limiting hole 46;

[0045] When in use, under the rebound effect of the spring 41, the vertical plate 40 will be firmly embedded in the locking groove 48, maintaining the stability of the limiting rod 37. At the same time, when the pulling force on the vertical plate 40 is cancelled, the spring 41 is in a pulled-up state, and the limiting rod 37 will automatically insert into the locking groove 48. A number of holes are opened in the locking groove 48 to facilitate the docking of the limiting rod 37. At the same time, the opening of the locking groove 48 is chamfered and the end face of the limiting rod 37 is rounded to further improve the smoothness of the limiting rod 37 inserted into the locking groove 48. It is worth noting that During the entire movement process of the limit rod 37, even when the limit rod 37 is fully inserted into the locking groove 48, the spring 41 is still in a stretched state, so that the limit rod 37 has a stable thrust toward the locking groove 48. When the inner shaft 22 and the outer shaft 23 rotate, there will be centrifugal force on the limit rod 37. On the one hand, due to the limitation of the rebound force of the spring 41, on the other hand, during sowing, the speed of the vehicle body 6 is relatively low, so the limit rod 37 will always remain inserted into the locking groove 48 to ensure the stability of the connection between the inner shaft 22 and the outer shaft 23.

[0046] Embodiment 4: On the basis of embodiment 3, a side frame 1 is provided on the side of the vehicle body 6, and each sprocket, gear and chain are located in the side frame 1. The upper end of the side frame 1 is connected to the vehicle body 6 by bolts. An operating groove 54 is provided on the surface of the side frame 1. The operating groove 54 is opposite to the baffle 13. The operating groove 54 penetrates the side wall of the side frame 1. An outer groove 53 is provided at the periphery of the operating groove 54. A ferromagnetic strip 51 is fixed in the outer groove 53. The operating groove 54 is blocked by a sealing plate 4. The sealing plate 4 is made of ferromagnetic metal material, and the ferromagnetic strip 51 attracts the sealing plate 4. The surface of the sealing plate 4 is fixed by the handle 5. A support plate 14 is fixed to the side of the vehicle body 6 near the bottom. A guide rod 16 is fixed to the surface of the support plate 14. Guide holes 52 are provided on both sides of the bottom of the side frame 1. The outer wall of the guide rod 16 and the inner wall of the guide hole 52 are slidably connected. The bottom sides of the side frame 1 are in contact and tightly against the surface of the support plate 14, and the top of the guide rod 16 is in contact and tightly against the bottom wall of the guide hole 52;

[0047] When in use, a side frame 1 is installed on the side of the machine body to protect multiple sprockets, chains and gears. At the same time, an operating groove 54 is opened on the surface of the side frame 1 to facilitate the operator to operate the vertical plate 40. At the same time, a sealing plate 4 for easy installation and disassembly is installed outside the operating groove 54.

[0048] Working principle: In actual use, the transmission and conversion of power is realized through the meshing transmission of sprockets, chains and gears. The connection between the inner shaft 22 and the outer shaft 23 can be cut off as needed, so that the vehicle body 6 can only move without sowing when necessary, or move and sow at the same time when necessary.

[0049] A method for raising rice seedlings, comprising the following steps:

[0050] S1: When only the vehicle body 6 needs to be moved, the operator rotates the abutment rod 39 to set the abutment rod 39 horizontally and pulls it so that the abutment rod 39 passes through the through slot 49 and moves to the outside of the baffle 13. Then, the abutment rod 39 is rotated to set the abutment rod 39 vertically. Both ends of the abutment rod 39 are embedded in the locking slot 48. During this process, the limiting rod 37 is pulled out of the limiting hole 46 and finally enters the through hole 44. The spring 41 is continuously stretched and stores elastic potential energy.

[0051] S2: Subsequently, the operator holds the push handle 7 and applies force, and the vehicle body 6 is moved under the action of the rear shaft 11, the front shaft 10, the front wheel 2, the rear wheel 3 and the base 12. When the vehicle body 6 moves, the rear shaft 11 will continue to rotate, thereby driving the fifth sprocket 25 to rotate synchronously, and under the transmission action of the first chain 15, the fourth sprocket 24 will be driven to rotate, and then the circumscribed shaft 23 will be driven to rotate as a whole. Since the circumscribed shaft 23 and the inscribed shaft 22 are connected by a bearing, the rotation of the circumscribed shaft 23 will not drive the rotation of the inscribed shaft 22;

[0052] S3: When the vehicle body 6 needs to be moved and sowing is performed, the operator needs to pull the vertical plate 40 and extract the vertical plate 40 from the locking groove 48 until the vertical plate 40 moves to the outside of the baffle 13, then rotate the vertical plate 40 and set the vertical plate 40 horizontally, then cancel the pulling force on the vertical plate 40, and under the rebound action of the spring 41, the limit rod 37 will move, and the limit rod 37 will be inserted into the limit hole 46 to achieve the connection between the circumscribed shaft 23 and the inscribed shaft 22;

[0053] S4: At this time, the operator holds the push handle 7 and applies force, and the vehicle body 6 moves under the action of the rear shaft 11, the front shaft 10, the front wheel 2, the rear wheel 3 and the base 12. When the vehicle body 6 moves, the rear shaft 11 will continue to rotate, thereby driving the fifth sprocket 25 to rotate synchronously, and under the transmission action of the first chain 15, the fourth sprocket 24 will be driven to rotate, thereby driving the circumscribed shaft 23 to rotate as a whole;

[0054] S5: Since the limiting rod 37 is inserted into the limiting hole 46, the inner shaft 22 and the outer shaft 23 are connected, so that the outer shaft 23 rotates, and then the third sprocket 21 rotates. Subsequently, the first transmission shaft 26 is driven to rotate under the transmission action of the fourth chain 55. Under the meshing action of the first gear 28 and the second gear 30 and the meshing action of the second gear 30 and the third gear 34, the third transmission shaft 31 is driven to rotate, thereby driving the seventh sprocket 32 ​​and the eighth sprocket 33 to rotate synchronously. Under the transmission action of the third chain 17 and the second chain 18, the first sprocket 19 and the second sprocket 20 are driven to rotate respectively, thereby driving the first discharge shaft 42 and the second discharge shaft 43 to rotate, so that the rice seeds inside the feeding chamber 8 are sown to the bottom.

[0055] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rice seed raising device, characterized in that: The rice seed seedling raising device comprises: a vehicle body (6), a third transmission shaft (31), a second transmission shaft (29), a first transmission shaft (26) and an inscribed shaft (22) are connected to a surface of one side of the vehicle body (6) via a bearing, a third gear (34), a seventh sprocket (32) and an eighth sprocket (33) are fixed to the third transmission shaft (31), a second gear (30) is fixed to the second transmission shaft (29), a first gear (28) and a sixth sprocket (27) are fixed to the first transmission shaft (26), and a third sprocket (21) is fixed to the inscribed shaft (22); The inner shaft (22) is rotatably connected to the outer shaft (23), the outer shaft (23) is divided into two ends, the large end of the outer shaft (23) is located inside the inner shaft (22), the small end of the outer shaft (23) is located outside the inner shaft (22), and a fourth sprocket (24) is fixed on the small end of the outer shaft (23); An outer tube (36) is fixed on the surface of the inscribed shaft (22), a through hole (44) is opened on the surface of the inscribed shaft (22), the through hole (44) penetrates the inscribed shaft (22) and the outer tube (36), a limit rod (37) is slidably connected in the through hole (44), and a fixed plate (38) is fixed on the end surface of the limit rod (37).

2. A rice seed raising device according to claim 1, characterized in that: The upper surface of the vehicle body (6) is provided with a feeding cavity (8), and the lower surface of the vehicle body (6) is provided with a discharging port (9). The feeding cavity (8) and the discharging port (9) are communicated with each other. A first discharging shaft (42) and a second discharging shaft (43) are arranged inside the feeding cavity (8). Both ends of the first discharging shaft (42) and the second discharging shaft (43) are rotatably connected to the vehicle body (6). One end of the first discharging shaft (42) extends out of the vehicle body (6) and a first sprocket (19) is fixed at the end surface. One end of the second discharging shaft (43) extends out of the vehicle body (6) and a second sprocket (20) is fixed at the end surface.

3. A rice seed raising device according to claim 1, characterized in that: The seventh sprocket (32) is arranged close to the outermost end of the third transmission shaft (31), the third gear (34) is arranged close to the innermost end of the third transmission shaft (31), the eighth sprocket (33) is located between the third gear (34) and the seventh sprocket (32), the sixth sprocket (27) is arranged close to the outermost end of the first transmission shaft (26), and the first gear (28) is arranged close to the innermost end of the first transmission shaft (26).

4. A rice seed raising device according to claim 2, characterized in that: The first sprocket (19) and the seventh sprocket (32) are connected via the third sprocket (21), the seventh sprocket (32) and the second sprocket (20) are connected via the second chain (18), the sixth sprocket (27) and the third sprocket (21) are connected via the fourth chain (55), the third gear (34) and the second gear (30) are meshed and connected, and the first gear (28) and the second gear (30) are meshed and connected.

5. The rice seed raising device according to claim 1, characterized in that: A base (12), a front rotating shaft (10) and a rear rotating shaft (11) are arranged below the vehicle body (6); the base (12) is provided with four groups, and the four groups of bases (12) are arranged close to the four ends of the lower surface of the vehicle body (6), respectively; the base (12) is fixedly connected to the lower surface of the vehicle body (6) by bolts, the front rotating shaft (10) is connected to the two groups of bases (12) by bearings, the two ends of the front rotating shaft (10) are fixed with front wheels (2), and the surface of the vehicle body (6) is fixed with a push handle (7).

6. A rice seed raising device according to claim 5, characterized in that: The rear rotating shaft (11) is connected to the other two bases (12) through bearings, rear wheels (3) are fixed at both ends of the rear rotating shaft (11), a fifth sprocket (25) is fixed on the rear rotating shaft (11), the fifth sprocket (25) is located directly below the fourth sprocket (24), the fifth sprocket (25) and the fourth sprocket (24) are connected through a first chain (15), two groups of rear wheels (3) and two groups of front wheels (2) are located on both sides of the vehicle body (6), the two groups of front wheels (2) are symmetrically distributed about the central axis of the vehicle body (6), and the two groups of rear wheels (3) are symmetrically distributed about the central axis of the vehicle body (6).

7. The rice seed raising device according to claim 1, characterized in that: A baffle (13) is fixed on the side of the vehicle body (6). The baffle (13) is located beside the inscribed shaft (22). The baffle (13) is in the shape of a square plate. A through groove (49) is provided on the surface of the baffle (13). The cross section of the through groove (49) is rectangular. The through groove (49) penetrates the baffle (13). The central axis of the through groove (49) is consistent with the central axis of the baffle (13). A locking groove (48) is provided on the surface of the baffle (13). The locking groove (48) is provided in two groups. The two groups of locking grooves (48) are symmetrically distributed about the central axis of the through groove (49). The two groups of locking grooves (48) are located on the upper and lower sides of the through groove (49). The locking groove (48) and the through groove (49) are connected. The locking groove (48) extends into half of the surface of the baffle (13).

8. The rice seed raising device according to claim 1, characterized in that: A spring (41) is sleeved on the surface of the limiting rod (37), and the spring (41) is located between the fixed plate (38) and the extension tube (36). One end of the spring (41) is fixedly connected to the fixed plate (38), and the other end of the spring (41) is fixedly connected to the extension tube (36). The surface of the fixed plate (38) is rotatably connected to an abutment rod (39), and a vertical plate (40) is fixed at the end surface of the abutment rod (39). Both ends of the vertical plate (40) are embedded in the locking groove (48), and the vertical plate (40) can pass through the through groove (49).

9. The rice seed raising device according to claim 1, characterized in that: A limiting hole (46) is provided on the surface of the circumscribed shaft (23), and a plurality of limiting holes (46) are provided. The plurality of limiting holes (46) are evenly distributed on the surface of the circumscribed shaft (23), the end surface of the limiting rod (37) is chamfered, the end of the limiting hole (46) is chamfered, and the limiting rod (37) is inserted into the limiting hole (46).

10. A method for raising rice seedlings according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: When only the vehicle body (6) needs to be moved, the operator rotates the abutment rod (39) to set the abutment rod (39) horizontally and pulls it so that the abutment rod (39) passes through the through slot (49) and moves to the outside of the baffle (13). Then, the abutment rod (39) is rotated to set the abutment rod (39) vertically, and both ends of the abutment rod (39) are embedded in the locking slot (48). During this process, the limiting rod (37) is pulled out of the limiting hole (46) and finally enters the through hole (44). The spring (41) is continuously stretched and stores elastic potential energy. S2: Subsequently, the operator holds the push handle (7) and applies force, and the vehicle body (6) is moved under the action of the rear rotating shaft (11), the front rotating shaft (10), the front wheel (2), the rear wheel (3) and the base (12). When the vehicle body (6) moves, the rear rotating shaft (11) will continue to rotate, thereby driving the fifth sprocket (25) to rotate synchronously. Under the transmission action of the first chain (15), the fourth sprocket (24) will be driven to rotate, and then the circumscribed shaft (23) will be driven to rotate as a whole. Since the circumscribed shaft (23) and the inner shaft (22) are connected by a bearing, the rotation of the circumscribed shaft (23) will not drive the inner shaft (22) to rotate. S3: When the vehicle body (6) needs to be moved and sowing is carried out, the operator needs to pull the vertical plate (40) and extract the vertical plate (40) from the locking groove (48) until the vertical plate (40) moves to the outside of the baffle (13), and then rotate the vertical plate (40) to set the vertical plate (40) horizontally. Then, the pulling force on the vertical plate (40) is cancelled, and under the rebound action of the spring (41), the limit rod (37) will move, and the limit rod (37) will be inserted into the limit hole (46), so as to realize the connection between the circumscribed shaft (23) and the inscribed shaft (22); S4: At this time, the operator holds the push handle (7) and applies force, and the vehicle body (6) is moved under the action of the rear rotating shaft (11), the front rotating shaft (10), the front wheel (2), the rear wheel (3) and the base (12). When the vehicle body (6) moves, the rear rotating shaft (11) will continue to rotate, thereby driving the fifth sprocket (25) to rotate synchronously, and under the transmission action of the first chain (15), the fourth sprocket (24) will be driven to rotate, thereby driving the external shaft (23) to rotate as a whole; S5: As the limiting rod (37) is inserted into the limiting hole (46), the inner shaft (22) and the outer shaft (23) are connected, thereby causing the outer shaft (23) to rotate, thereby causing the third sprocket (21) to rotate. Subsequently, under the transmission action of the fourth chain (55), the first transmission shaft (26) is driven to rotate. Under the meshing action of the first gear (28) and the second gear (30) and the meshing action of the second gear (30) and the third gear (34), the third transmission shaft (31) is driven to rotate, thereby driving the seventh sprocket (32) and the eighth sprocket (33) to rotate synchronously. Under the transmission action of the third chain (17) and the second chain (18), the first sprocket (19) and the second sprocket (20) are driven to rotate respectively, thereby driving the first feed shaft (42) and the second feed shaft (43) to rotate, so that the rice seeds in the feeding chamber (8) are sown to the bottom.

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