Hydraulic driving system of self-propelled field rice seedling tray seedling raising seeder

Abstract

The utility model discloses a hydraulic driving system of a self-propelled field rice seedling tray seedling raising seeding machine, belongs to the field of rice seedling raising seeding machines, and solves the problem of inconvenience in operation caused by mechanical operation steering of the conventional rice seedling raising seeding machine. The hydraulic driving system comprises a hydraulic pump and a hydraulic oil tank, the input end of the hydraulic pump is communicated with the hydraulic oil tank, the output end of the hydraulic pump is connected with a sizing device, an impurity removing device and a grouting device, the hydraulic driving system further comprises a steering pump, a hydraulic steering gear and a steering oil cylinder, and the input end of the steering pump is communicated with the hydraulic oil tank. The steering pump, the hydraulic steering gear and the steering oil cylinder are sequentially communicated, and the output end of the steering oil cylinder is connected with the crawler chassis. According to the hydraulic drive system, a hydraulic drive steering mode is adopted, operation is convenient, and working efficiency is effectively improved.

Description

Technical Field

[0001] The utility model relates to a rice seedling raising and sowing machine, and more specifically, to a hydraulic drive system for a self-propelled field rice seedling tray raising and sowing machine. Background Technique

[0002] Existing sowing machines are divided into two categories. The first category is the direct seeding machine, which has the advantages of saving labor, shortening the growth period, and high mechanization level. The disadvantages are difficult to achieve full seedlings, serious weed damage, and easy lodging. The second category is the seedling raising and sowing machine, which mechanically transplants rice seedlings after sowing and raising seedlings. It has the following advantages: ① The seedlings are evenly distributed and the transplanting quality is good; ② Good ventilation and air permeability, resistant to lodging and diseases and pests; ③ Greatly alleviates the problem of insufficient rural labor during the busy farming season; ④ Saves time and labor, eases the farming time, can concentrate water use and save costs; ⑤ Low labor intensity and high transplanting efficiency; ⑥ Increases production and income compared with traditional rice transplanting; ⑦ Facilitates large-scale planting and industrial development of rice. The first category of direct seeding machines is not currently widely used in production, while the second category of seedling raising and sowing machines is more widely used.

[0003] In existing seedling raising and sowing machines, such as the applicant's prior application with the publication number: CN214757820U, a self-propelled field rice seedling tray raising and sowing machine is disclosed, belonging to the field of rice seedling raising and sowing machines. The sowing machine includes a frame, an engine, a crawler chassis, a fertilizing device, a weeding device, a sowing device, and a conveying device, and also includes a generator, a sizing device, a grouting device, and a hydraulic device. The output end of the engine is respectively connected to the input ends of the crawler chassis, the generator, and the hydraulic device. The output end of the generator is respectively electrically connected to the fertilizing device, the sowing device, and the conveying device. The output end of the hydraulic device is respectively connected to the sizing device, the weeding device, and the grouting device. The sowing machine of the utility model drives each mechanism to move through power output in multiple directions, realizes self-propelled operation in the field, directly uses the slurry in the paddy field as the seedling raising substrate, and completes all processes of rice seedling tray sowing such as filling slurry, fertilizing, and sowing at one time, with the characteristics of stable, uniform, and good sowing quality, flexible seedling raising, and easy maintenance of seedlings.

[0004] In existing sowing machines, the sizing device, the weeding device, and the grouting device all adopt a hydraulic drive method. However, when the sowing machine is moving, it relies on a manual steering wheel for steering, which is a relatively traditional mechanical steering method. When the sowing machine moves in the mud field, the steering resistance of the crawler chassis is relatively large. For the driver, the operation is relatively laborious, the steering is slow, and it is extremely inconvenient to use. Content of the Utility Model

[0005] The technical problem to be solved by the utility model is to provide a hydraulic drive system for a self-propelled field rice seedling tray raising and sowing machine in view of the above deficiencies of the prior art. The hydraulic drive steering method is adopted, which is convenient to operate and effectively improves the operation efficiency.

[0006] The technical solution of the utility model is as follows: A hydraulic drive system for a self-propelled field rice seedling tray raising and sowing machine, including a hydraulic pump and a hydraulic oil tank. The input end of the hydraulic pump is communicated with the hydraulic oil tank, and the output end of the hydraulic pump is connected to a sizing device, a impurity removing device, and a grouting device. It also includes a steering pump, a hydraulic steering gear, and a steering cylinder. The input end of the steering pump is communicated with the hydraulic oil tank, and the steering pump, the hydraulic steering gear, and the steering cylinder are sequentially communicated. The output end of the steering cylinder is connected to the crawler chassis.

[0007] As a further improvement, the hydraulic drive system further includes a hydraulic oil cooler. The output end of the hydraulic oil cooler is connected to the hydraulic oil tank, and the input end of the hydraulic oil cooler is respectively connected to the sizing device, the impurity removing device, the grouting device, and the steering cylinder.

[0008] Further, the sizing device includes a scraper chain, a first gear motor, and a first hydraulic cylinder. The first gear motor is connected to the rotating shaft of the scraper chain, and the first gear motor is connected to the hydraulic pump through a throttle valve. The middle of the bracket of the scraper chain is hinged to the frame, and the other end is hinged to one end of the first hydraulic cylinder. The other end of the first hydraulic cylinder is hinged to the frame, and the first hydraulic cylinder is also connected to the hydraulic pump through a throttle valve.

[0009] Further, the grouting device includes a slurry tank, a propeller, and a second gear motor. The propeller is rotatably installed at the bottom of the slurry tank, the second gear motor is connected to the propeller, and the second gear motor is connected to the hydraulic pump through a throttle valve.

[0010] Further, the grouting device further includes a slurry tank gate, a slurry tank gate switch, and a second hydraulic cylinder. The slurry tank gate and the second hydraulic cylinder are both installed on one side of the slurry tank, and the output end of the second hydraulic cylinder is connected to the slurry tank gate. The second hydraulic cylinder is also connected to the hydraulic pump through a throttle valve. The slurry tank gate switch is electrically connected to the generator and the throttle valve corresponding to the second hydraulic cylinder respectively.

[0011] Further, the impurity removing device includes an impurity removing screen, a third gear motor, and a third hydraulic cylinder. The third gear motor is connected to the impurity removing screen, and the third gear motor is connected to the hydraulic pump through a throttle valve. The third hydraulic cylinder is installed on the frame, and the output end of the third hydraulic cylinder is connected to the impurity removing screen. The third hydraulic cylinder is connected to the hydraulic pump through a throttle valve.

[0012] Further, the hydraulic steering gear is detachably installed on the frame.

[0013] Furthermore, a U-shaped seat is provided at the top of the frame. The inner wall width of the U-shaped seat is adapted to the width of the hydraulic steering gear. The hydraulic steering gear is slidably inserted into the U-shaped seat. Two fixing rods are fixed on the frame above the U-shaped seat. The two fixing rods are attached to the top of the hydraulic steering gear, and the hydraulic steering gear is connected to the fixing rods through a bolt and nut assembly. A chute extending along the axial direction thereof is provided on the fixing rod, and the bolt corresponding to the bolt and nut assembly is slidably inserted into the chute.

[0014] Furthermore, the hydraulic oil tank is installed on the frame at the end opposite to the sizing device.

[0015] Furthermore, a support plate is hingedly installed at one end of the hydraulic oil tank away from the frame. The hinge point of the support plate and the hydraulic oil tank is located between the top of the support plate and the hydraulic oil tank.

[0016] Advantages

[0017] Compared with the prior art, the utility model has the following advantages:

[0018] 1. In the hydraulic drive system of the utility model, an additional hydraulic pump, a hydraulic steering gear, and a steering cylinder are arranged to be connected to the crawler chassis. The hydraulic pump is used to supply hydraulic oil to the hydraulic steering gear, and different directions of hydraulic oil are supplied to the hydraulic cylinder by controlling the oil circuit of the hydraulic steering gear, so as to drive the crawler chassis to turn, realizing the hydraulic drive steering method, which is convenient to operate and effectively improves the operation efficiency.

[0019] 2. In the hydraulic drive system of the utility model, by placing the hydraulic oil tank in front of the frame at the end opposite to the sizing device, the balance of the whole rice seedling planter is better, and it can better adapt to driving in paddy fields; at the same time, a support plate is hinged on one side of the hydraulic oil tank. In the actual use process, some heavy objects, such as stones and mud blocks, can be placed on the support plate according to the sizing flow rate and speed. In this way, the problem of the whole machine tilting backward can be effectively prevented. At the same time, when driving on the road, the support plate can also be lifted to avoid the problem of interference between the support plate and the ground when the whole machine crosses potholes. Description of the Drawings

[0020] Figure 1 It is the front view structural schematic diagram of the planter in the utility model;

[0021] Figure 2 It is the signal block diagram of the utility model;

[0022] Figure 3 It is the hydraulic oil circuit schematic diagram of the utility model;

[0023] Figure 4 It is the front view structural schematic diagram of the installation of the hydraulic steering gear in the utility model;

[0024] Figure 5 This is a schematic side view structure diagram for the installation of the hydraulic steering gear in the present utility model.

[0025] Wherein: 1-frame, 2-crawler chassis, 3-hydraulic pump, 4-second gear motor, 5-propeller, 6-gearbox, 7-generator, 8-engine, 9-fertilizer tank, 10-first roller, 11-third hydraulic cylinder, 12-impurity removal sieve, 13-third gear motor, 14-slurry tank, 15-first gear motor, 16-scraper chain, 17-first hydraulic cylinder, 18-slurry tank gate, 19-second hydraulic cylinder, 20-seed box, 21-second roller, 22-belt conveyor, 23-hydraulic oil tank, 24-support plate, 25-hydraulic steering gear, 26-U-shaped seat, 27-fixed rod, 28-bolt and nut assembly. Specific embodiments

[0026] The following further describes the present utility model with reference to specific embodiments in the accompanying drawings.

[0027] Refer to Figures 1-3 , a self-propelled field rice seedling tray raising and sowing machine, comprising a frame 1, an engine 8, a crawler chassis 2, a fertilizing device, an impurity removal device, a sowing device and a conveying device, further comprising a generator 7, a sizing device, a grouting device and a hydraulic device. Among them, the crawler chassis 2 is installed at the bottom of the frame 1, and the engine 8, the fertilizing device, the impurity removal device, the sowing device and the conveying device, the generator 7, the sizing device, the grouting device and the hydraulic device are all installed on the frame 1. The output end of the engine 8 is respectively connected to the input ends of the crawler chassis 2, the generator 7 and the hydraulic device. Specifically, the engine 8 is connected to the crawler chassis 2 through a gearbox 6. The engine 8 is electrically connected to a start switch, and the start switch is electrically connected to a storage battery. The generator 7 is also electrically connected to the storage battery to realize power storage. The output end of the generator 7 is respectively electrically connected to the fertilizing device, the sowing device and the conveying device. Specifically, the output end of the generator 7 is respectively electrically connected to the fertilizing device, the sowing device and the conveying device through a main switch. The output end of the hydraulic device is respectively connected to the sizing device, the impurity removal device and the grouting device.

[0028] The self-propelled rice seedling tray raising and sowing machine in the field has the engine output end connected to the crawler chassis 2, the generator 7 and the hydraulic device at the same time. The crawler chassis 2 is used to make the sowing machine walk stably in the field. The low-voltage DC generator is used to drive the fertilizer application device, the sowing device and the conveying device with relatively small loads, which is safer than using an ordinary generator. At the same time, the travel switch is used to make the fertilizer application and sowing more accurate, and the speed governor is used to make the fertilizer application and sowing more uniform. By adding a hydraulic device to drive the sizing device, the impurity removal device and the grouting device with relatively large loads, the problem of insufficient power of low voltage is solved, and a stable grouting effect is achieved. The power is output in multiple directions to drive each mechanism to move, and the drive device is reasonably optimized to ensure the stability, accuracy and uniformity of the sowing process. Moreover, the slurry in the paddy field is directly used as the seedling raising substrate, and all processes such as slurry filling, fertilizer application and sowing are completed at one time, saving the costs of building a seedling raising factory and transporting the seedling raising substrate, etc.

[0029] A hydraulic drive system of a self-propelled rice seedling tray raising and sowing machine in the field, that is, a hydraulic device, which includes a hydraulic pump 3 and a hydraulic oil tank. The input end of the hydraulic pump 3 is communicated with the hydraulic oil tank, and the output end of the hydraulic pump 3 is connected to the sizing device, the impurity removal device and the grouting device. It also includes a steering pump, a hydraulic steering gear and a steering cylinder. The input end of the steering pump is communicated with the hydraulic oil tank, and the steering pump, the hydraulic steering gear and the steering cylinder are communicated in sequence. The output end of the steering cylinder is connected to the crawler chassis 2 to form a hydraulic steering system, and its working principle is the same as that of the hydraulic steering system of the existing technology, such as a crawler hydraulic excavator. The hydraulic pump 3 sucks out the hydraulic oil in the hydraulic oil tank and pumps it into the sizing device, the impurity removal device and the grouting device to realize the hydraulic drive of the three to work. At the same time, another path of hydraulic oil is sucked out by the steering pump and pumped into the hydraulic steering gear and the steering cylinder. The driver can realize the steering of the crawler chassis 2 by operating the hydraulic steering gear with the handle. The hydraulic drive steering method is convenient to operate and effectively improves the operation efficiency.

[0030] Preferably, the hydraulic device further includes a hydraulic oil cooler. The output end of the hydraulic oil cooler is connected to the hydraulic oil tank, and the input end of the hydraulic oil cooler is respectively connected to the sizing device, the impurity removal device, the grouting device and the steering cylinder. Specifically, the input end of the hydraulic oil cooler is respectively connected to the first gear motor 15 and the first hydraulic cylinder 17 of the sizing device, the second gear motor 4 and the second hydraulic cylinder 19 of the grouting device, and the third gear motor 13 and the third hydraulic cylinder 11 of the impurity removal device, and the hydraulic oil after the driving components move is returned to the hydraulic oil cooler for cooling to ensure the continuous use of the hydraulic oil.

[0031] Preferably, the sizing device includes a scraper chain 16, a first gear motor 15, and a first hydraulic cylinder 17. Among them, the scraper chain 16 is a conveyor of the prior art composed of a bracket, a chain, and a scraper. The first gear motor 15 is connected to the rotating shaft of the scraper chain 16, and the first gear motor 15 is connected to the hydraulic pump 3 through a throttle valve. The hydraulic pump 3 supplies oil to the first gear motor 15 to drive the first gear motor 15 to rotate, thereby driving the scraper chain 16 to rotate. Then, the mud can be scraped onto the scraper of the scraper chain 16 and conveyed to its top. Further, the middle of the bracket of the scraper chain 16 is hinged to the frame 1, and the other end is hinged to one end of the first hydraulic cylinder 17. The other end of the first hydraulic cylinder 17 is hinged to the frame 1, and the first hydraulic cylinder 17 is connected to the hydraulic pump 3 through a throttle valve. When the seeder is walking normally, the swing of the scraper chain 16 can be adjusted by the first hydraulic cylinder 17 to lift the bottom of the scraper chain 16 to prevent the scraper chain 16 from contacting the ground. When the seeder is sowing, the swing of the scraper chain 16 is adjusted by the first hydraulic cylinder 17 again to make the scraper chain 16 contact the mud in the field to realize the sizing work and meet the different requirements of walking and sucking slurry. In other embodiments, the scraper chain 16 can also be slidably installed on the frame 1, the first hydraulic cylinder 17 is installed on the frame 1, and at the same time, the output end of the first hydraulic cylinder 17 is connected to the scraper chain 16. By adjusting the lifting of the scraper chain 16 by the first hydraulic cylinder 17, the sizing work can also be realized to meet the different requirements of walking and sucking slurry.

[0032] Preferably, the sizing device further includes a slurry suction switch and a scraper chain swing switch. Among them, the slurry suction switch is electrically connected to the generator 7 and the throttle valve corresponding to the first gear motor 15 respectively, and the scraper chain swing switch is electrically connected to the generator 7 and the throttle valve corresponding to the first hydraulic cylinder 17 respectively. Specifically, both the slurry suction switch and the scraper chain swing switch are connected to the main switch corresponding to the generator 7, which is convenient for controlling the slurry suction and swing of the scraper chain 16.

[0033] Preferably, the grouting device includes a slurry tank 14, a propeller 5, and a second gear motor 4. Among them, the propeller 5 is rotatably installed at the bottom of the slurry tank 14, the second gear motor 4 is connected to the propeller 5, and the second gear motor 4 is connected to the hydraulic pump 3 through a throttle valve. The hydraulic pump 3 supplies oil to the second gear motor 4 to drive the second gear motor 4 to work, thereby driving the propeller 5 to rotate and conveying the slurry in the slurry tank 14 to the discharge port of the slurry tank 14.

[0034] Preferably, the grouting device further includes a grouting switch and a travel switch. Among them, the grouting switch is electrically connected to the travel switch, and the grouting switch is electrically connected to the generator 7. Specifically, the grouting switch is electrically connected to the main switch corresponding to the generator 7, and the travel switch is electrically connected to the throttle valve corresponding to the second gear motor 4. It is convenient to control the grouting action to realize the high-power grouting demand and accurate grouting.

[0035] Preferably, the grouting device further includes a slurry tank gate 18, a slurry tank gate switch, and a second hydraulic cylinder 19. Among them, the slurry tank gate 18 and the second hydraulic cylinder 19 are both installed on one side of the slurry tank 14. A relief opening is provided on one side of the slurry tank 14. The slurry tank gate 18 blocks the relief opening, and the slurry tank gate 18 is slidably connected to the slurry tank 14. The output end of the second hydraulic cylinder 19 is connected to the slurry tank gate 18. The second hydraulic cylinder 19 is also connected to the hydraulic pump 3 through a throttle valve. The slurry tank gate switch is electrically connected to the generator 7 and the throttle valve corresponding to the second hydraulic cylinder 19. Specifically, the slurry tank gate switch is electrically connected to the main switch corresponding to the generator 7. After sowing is completed, the slurry gate switch is turned on, and the second hydraulic cylinder 19 operates to drive the slurry tank gate 18 to contract, exposing the relief opening to facilitate the scraper chain 16 to be received in the slurry tank 14.

[0036] Preferably, the impurity removal device includes an impurity removal screen 12, a third gear motor 13, and a third hydraulic cylinder 11. Among them, the impurity removal screen 12 is slidably installed on the top of the slurry tank 14. The third gear motor 13 is connected to the impurity removal screen 12, and the third gear motor 13 is connected to the hydraulic pump 3 through a throttle valve. The hydraulic pump 3 supplies oil to the third gear motor 13 to drive the third gear motor 13 to rotate, thereby vibrating the impurity removal screen 12 to achieve vibration filtration of the slurry; the third hydraulic cylinder 11 is installed on the frame 1, and the output end of the third hydraulic cylinder 11 is connected to the impurity removal screen 12. The third hydraulic cylinder 11 is connected to the hydraulic pump 3 through a throttle valve. After sowing is completed, the third hydraulic cylinder 11 operates to drive the impurity removal screen 12 to move and contract, so as to facilitate the scraper chain 16 to be received in the slurry tank 14.

[0037] Preferably, the impurity removal device further includes an impurity removal screen vibration switch and an impurity removal screen movement switch. Among them, the impurity removal screen vibration switch is electrically connected to the generator 7 and the throttle valve corresponding to the third gear motor 13, and the impurity removal screen movement switch is electrically connected to the generator 7 and the throttle valve corresponding to the third hydraulic cylinder 11. Specifically, both the impurity removal screen vibration switch and the impurity removal screen movement switch are electrically connected to the main switch corresponding to the generator 7, which facilitates controlling the vibration and movement of the impurity removal screen 12.

[0038] Preferably, the fertilizing device includes a fertilizer tank 9 and a first roller 10. The first roller 10 is rotatably installed at the bottom of the fertilizer tank 9. The first roller 10 is electrically connected to a speed regulating motor, the speed regulating motor is electrically connected to a speed regulator, the speed regulator is electrically connected to a travel switch, the travel switch is electrically connected to a fertilizing switch, and the fertilizing switch is electrically connected to the main switch, so as to control the rotation of the first roller 10 for fertilizing.

[0039] Preferably, the seeding device includes a seed box 20 and a second roller 21. The second roller 21 is electrically connected to a speed-regulating motor, the speed-regulating motor is electrically connected to a speed governor, the speed governor is electrically connected to a travel switch, the travel switch is electrically connected to a seeding switch, and the seeding switch is electrically connected to a main switch, so as to control the rotation of the second roller 21 for seeding. Among them, two sets of the second roller 21, the speed-regulating motor, the travel switch and their corresponding speed governors are provided, so that when the seedling tray passes through, seeding is carried out twice continuously, achieving the purpose of more uniform seeding.

[0040] Preferably, the conveying device is a belt conveyor 22. The driving shaft of the belt conveyor 22 is electrically connected to a speed-regulating motor, the speed-regulating motor is electrically connected to a speed governor, the speed governor is electrically connected to a transmission switch, and the transmission switch is electrically connected to a main switch, so as to control the rotation of the belt conveyor 22 to convey the seedling tray. Further, the belt rack of the belt conveyor 22 is composed of two sections of brackets, and the two sections of brackets are hinged to each other. And an anti-top bolt is screwed on one of the brackets, and the other bracket is anti-topped by the anti-top bolt to realize the locking of the two sections of brackets. When seeding is not carried out, one of the sections can be folded up, which has the characteristics of saving storage space and being convenient for transportation, and is very convenient to use.

[0041] When the self-propelled rice seedling tray raising and seeding machine of this embodiment is in use, drive the seeding machine to an appropriate position in the paddy field that has been plowed and harrowed in advance, put fertilizer (strong seedling agent) into the fertilizer box 9, put seeds (sprouted grains) into the seed box 20, adjust the positions of the scraper chain 16 and the impurity removal sieve 12, start the slurry suction switch and the impurity removal sieve vibration switch. The slurry in the field is conveyed to the impurity removal sieve 12 by the scraper chain 16, and the slurry falls into the slurry tank 14 through the vibration of the impurity removal sieve 12. Large mud blocks and sundries leak back into the field from the inclined side of the impurity removal sieve 12. Place the seedling tray on the belt conveyor 22, and it passes through the positions where the fertilizer box 9, the slurry tank 14, and the seed box 20 are located in sequence, and after fertilization, grouting, and seeding, it is output from the rear end of the belt conveyor 22, and then place the seeding finished product in the field for seedling raising. This seeding machine has a reasonable structural design and comprehensive seeding functions. It can walk freely in the field, can directly extract paddy field slurry as the seedling raising substrate, and can complete all seeding processes such as seedling tray conveying, fertilization, slurry suction, impurity removal, grouting, and seeding at one time. It has high seeding efficiency, good seeding quality, flexible seedling raising, easy maintenance of seedlings, and low cost.

[0042] In order to facilitate the disassembly, assembly and maintenance of the hydraulic steering gear 25, the hydraulic steering gear 25 is detachably mounted on the frame 1. Specifically, since the hydraulic steering gear 25 is added to the existing seeding and sowing machine, it must be installed on the driving console of the frame 1 for convenient operation. Therefore, the installation method of the hydraulic steering gear 25 is as follows: a U-shaped seat 26 is provided on the top of the frame 1, and the U-shaped seat 26 is fixed to the frame 1 by welding. The inner wall width of the U-shaped seat 26 is adapted to the width of the hydraulic steering gear 25, wherein the hydraulic steering gear 25 is slidably inserted in the U-shaped seat 26, playing a supporting role for the hydraulic steering gear 25, and also limiting the lower part of the hydraulic steering gear 25. Two fixing rods 27 are fixed on the frame 1 above the U-shaped seat 26, and the two fixing rods 27 are welded. The hydraulic steering gear 25 is fixed to the frame 1 in a fixed manner, and two fixing rods 27 are attached to the top of the hydraulic steering gear 25. The hydraulic steering gear 25 is connected to the fixing rods 27 by a bolt and nut assembly 28. The fixing rod 27 is provided with a slide groove extending along its axial direction. The bolts corresponding to the bolt and nut assembly 28 are slidably inserted into the slide groove. Specifically, the bolts corresponding to the bolt and nut assembly 28 are welded and fixed to the top of the hydraulic steering gear 25, and then pass through the slide groove corresponding to the fixing rod 27. Then, the nuts are threadedly connected to the bolts to achieve the fixation of the hydraulic steering gear 25. When disassembling, the hydraulic steering gear 25 can be directly pulled out by loosening the nuts, which is very convenient for disassembly and maintenance.

[0043] The installation method in this embodiment not only enables quick disassembly and assembly of the hydraulic steering gear 25 for easy maintenance, but also requires only additional processing of the fixing rod 27 and welding of the fixing rod 27 and the U-shaped seat 26. Compared with cutting, drilling and other operations on the existing frame, this method not only does not damage the structural strength of the existing frame and ensures its service life, but also makes the processing operation very convenient, greatly reducing the difficulty of installation.

[0044] In existing seedling raising and sowing machines, the sizing device is large in size and heavy in weight, so it is installed at the rear end of the seedling raising and sowing machine in the direction of travel. As a result, during operation, when the sizing device is sizing, the rear end of the seedling raising and sowing machine will sink due to the gravity of the mud, resulting in low balance of the entire machine and low walking stability. Therefore, in this embodiment, the hydraulic oil tank 23 is installed on the frame 1 at the end opposite to the sizing device to increase the weight of the front end of the seedling raising and sowing machine. At the same time, a support plate 24 is hingedly installed at the end of the hydraulic oil tank 23 away from the frame 1. The hinge point between the support plate 24 and the hydraulic oil tank 23 is located between the support plate 24 and the top of the hydraulic oil tank 23, so that when the support plate 24 is opened, the side of the support plate 24 contacts the side of the hydraulic oil tank 23 to form a limit, thereby allowing the support plate 24 to remain in a horizontal state, thereby facilitating the placement of counterweights.

[0045] In this embodiment, by placing the hydraulic oil tank 23 at the front end of the frame on the opposite side of the sizing device, that is, at the front end of the traveling direction of the rice seedling planter, the balance of the whole rice seedling planter is better, and it can better adapt to traveling in paddy fields. At the same time, a support plate 24 is hinged on one side of the hydraulic oil tank 23. During actual use, some heavy objects such as stones and mud blocks can be placed on the support plate 24 according to the sizing flow rate and speed, which can effectively prevent the problem of the whole machine tilting backward. At the same time, when traveling on the road, the support plate 24 can also be lifted to avoid the problem of interference between the support plate 24 and the ground when the whole machine crosses a potholed section.

[0046] The above are only the preferred embodiments of the present invention. It should be noted that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which will not affect the implementation effect of the present invention and the practicability of the patent.

Claims

1. A hydraulic drive system for a self-propelled field rice seedling tray raising and sowing machine, comprising a hydraulic pump (3) and a hydraulic oil tank (23), wherein the input end of the hydraulic pump (3) is communicated with the hydraulic oil tank (23), and the output end of the hydraulic pump (3) is connected to a sizing device, a impurity removing device, and a grouting device, characterized in that, It further includes a steering pump, a hydraulic steering gear (25), and a steering cylinder. The input end of the steering pump is communicated with a hydraulic oil tank (23). The steering pump, the hydraulic steering gear (25), and the steering cylinder are communicated in sequence. The output end of the steering cylinder is connected to a crawler chassis (2).

2. The hydraulic drive system of a self-propelled field rice seedling tray raising and sowing machine according to claim 1, characterized in that, The hydraulic drive system further includes a hydraulic oil cooler. The output end of the hydraulic oil cooler is connected to the hydraulic oil tank (23). The input end of the hydraulic oil cooler is respectively connected to a sizing device, a impurity removing device, a grouting device, and the steering cylinder.

3. The hydraulic drive system of a self-propelled field rice seedling tray raising and sowing machine according to claim 1, characterized in that, The sizing device includes a scraper chain (16), a first gear motor (15), and a first hydraulic cylinder (17). The first gear motor (15) is connected to the rotating shaft of the scraper chain (16). And the first gear motor (15) is connected to a hydraulic pump (3) through a throttle valve. The middle of the bracket of the scraper chain (16) is hinged to a frame (1), and the other end is hinged to one end of the first hydraulic cylinder (17). The other end of the first hydraulic cylinder (17) is hinged to the frame (1). And the first hydraulic cylinder (17) is connected to the hydraulic pump (3) through a throttle valve.

4. The hydraulic drive system of a self-propelled field rice seedling tray raising and sowing machine according to claim 1, characterized in that, The grouting device includes a slurry tank (14), a propeller (5), and a second gear motor (4). The propeller (5) is rotatably installed at the bottom of the slurry tank (14). The second gear motor (4) is connected to the propeller (5). And the second gear motor (4) is connected to the hydraulic pump (3) through a throttle valve.

5. The hydraulic drive system of a self-propelled rice seedling tray raising and sowing machine in the field according to claim 1, characterized in that, The grouting device further includes a slurry tank gate (18), a slurry tank gate switch, and a second hydraulic cylinder (19). The slurry tank gate (18) and the second hydraulic cylinder (19) are both installed on one side of the slurry tank (14). And the output end of the second hydraulic cylinder (19) is connected to the slurry tank gate (18). The second hydraulic cylinder (19) is also connected to the hydraulic pump (3) through a throttle valve. The slurry tank gate switch is electrically connected to a generator (7) and the throttle valve corresponding to the second hydraulic cylinder (19) respectively.

6. The hydraulic drive system of a self-propelled field rice seedling tray raising and sowing machine according to claim 1, characterized in that, The impurity removing device includes an impurity removing screen (12), a third gear motor (13), and a third hydraulic cylinder (11). The third gear motor (13) is connected to the impurity removing screen (12). And the third gear motor (13) is connected to the hydraulic pump (3) through a throttle valve. The third hydraulic cylinder (11) is installed on the frame (1). And the output end of the third hydraulic cylinder (11) is connected to the impurity removing screen (12). The third hydraulic cylinder (11) is connected to the hydraulic pump (3) through a throttle valve.

7. A hydraulic drive system for a self-propelled field rice seedling tray raising and sowing machine according to any one of claims 1-6, characterized in that, The hydraulic steering gear (25) is detachably installed on the frame (1).

8. The hydraulic drive system of a self-propelled rice seedling tray raising and sowing machine in the field according to claim 7, characterized in that, The top of the described frame (1) is provided with a U-shaped seat (26), the inner wall width of the U-shaped seat (26) is adapted to the width of the hydraulic steering gear (25), the hydraulic steering gear (25) is slidably inserted into the U-shaped seat (26), two fixing rods (27) are fixed on the frame (1) above the U-shaped seat (26), the two fixing rods (27) are attached to the top of the hydraulic steering gear (25), and the hydraulic steering gear (25) is connected to the fixing rods (27) through a bolt-nut assembly (28). A chute extending along its axial direction is formed on the fixing rod (27), and the bolt corresponding to the bolt-nut assembly (28) is slidably inserted into the chute.

9. The hydraulic drive system of a self-propelled field rice seedling tray raising and sowing machine according to claim 7, characterized in that, The described hydraulic oil tank (23) is installed on the frame (1) at the end opposite to the sizing device.

10. The hydraulic drive system of a self-propelled rice seedling tray raising and sowing machine in the field according to claim 9, characterized in that, One end of the hydraulic oil tank (23) away from the frame (1) is hingedly installed with a support plate (24), and the hinge point of the support plate (24) and the hydraulic oil tank (23) is located between the top of the support plate (24) and the hydraulic oil tank (23).

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