Seeding machine with speed change function

Abstract

The utility model discloses a seeding machine with a speed change function. The seeding machine comprises a rack and a speed change mechanism, the rack is a seeder rack, a plurality of seeding devices are fixed on the rack by adopting a plurality of groups of seeding frames, ground wheels with wheel structures are arranged at the front ends of the seeding devices, the ground wheels are rotationally matched with the seeding frames, a wheel frame is fixed at each of two ends of the rack, a traveling wheel is matched with the lower side of each group of wheel frame, and a wheel shaft gear is coaxially fixed on each traveling wheel; the upper side of the wheel carrier is matched with a first transmission gear; the axle gear and the first transmission gear are in transmission fit through a chain, a second transmission gear is rotationally matched on the rack, the second transmission gear and a seed metering gear of the seed metering device are in transmission fit through a chain, and the first transmission gear and the second transmission gear are in transmission connection through a speed change mechanism; the utility model has the beneficial effects that the rotating speed of the seed-metering device can be adjusted, the application range is wide, and the speed change mechanism can be prevented from losing power due to chain separation.

Description

Technical Field

[0001] The utility model belongs to the technical field of seed drills, and particularly relates to a seed drill with a speed-changing function. Background Art

[0002] The patent document with publication number CN112106489A discloses a seeder, which includes: a fixed beam, a seed box, a seed meter, a profiling bracket, a profiling boat, a hanging frame, a ground ridger and a driving mechanism, wherein the seed box, the seed meter, the profiling bracket, the hanging frame, the ground ridger and the driving mechanism are fixed on the fixed beam, the discharge port of the seed box is docked with the feed port of the seeder, the profiling boat is fixed to one end of the profiling bracket away from the fixed beam, one end of the hanging frame is fixed to the fixed beam, and the other end is fixed to an external device, the ground ridger is located below the seed meter, and the driving mechanism is connected to the seed meter to drive the seed meter to meter seeds, thereby realizing mechanized sowing, which can effectively reduce manual participation and improve work efficiency.

[0003] The above-mentioned comparative documents rely on a seeding device to perform seeding operations. The power of the seeding device comes from a driving mechanism, but the power provided to the seeding device by its driving mechanism has a fixed transmission ratio. In the following three situations: ① when it is necessary to adjust the input speed of the seeding device according to the model of the seeding device, ② when the speed of the seeding device is adjusted according to the seeds to be sown (different seed sizes, sowing sparseness, and feeding speeds are different, so the speed of the seeding device needs to be adaptively adjusted for different seeds), ③ when the sowing speed needs to be adjusted; the above-mentioned driving mechanisms cannot adjust the rotation speed of the seeding device when the input speed is constant, resulting in a too small scope of application of the seeder. Utility Model Content

[0004] The utility model aims to provide a seed drill with a speed-changing function, so as to solve the technical problem that the background technology cannot adjust the rotation speed of the seed meter under the condition of constant input rotation speed, resulting in a too small application range.

[0005] The above technical objectives of the utility model are achieved through the following technical solutions:

[0006] A seeder with a speed change function comprises: a frame and a speed change mechanism; the frame is a seeder frame, on which a plurality of seeding devices are fixed by using a plurality of seeding frames, a ground-contacting wheel of a wheel structure is arranged at the front end of the seeding device, the ground-contacting wheel and the seeding frame are rotatably matched, a wheel frame is fixed at each end of the frame, a traveling wheel is matched at the lower side of each group of wheel frames, a wheel axle gear is coaxially fixed on the traveling wheel, and a first transmission gear is matched at the upper side of the wheel frame; the wheel axle gear and the first transmission gear are matched through chain transmission, a second transmission gear is rotatably matched on the frame, the second transmission gear and the seeding gear of the seeding device are matched through chain transmission, and the first transmission gear and the second transmission gear are connected through a speed change mechanism.

[0007] Furthermore, in order to realize variable speed transmission, the speed change mechanism includes: a driving shaft, a driving gear, a driven gear, a driven shaft, a deflection shaft, a deflection frame, a rotating cylinder, a first spring, a gearbox body, a connecting strip, a fixing groove, a buckle, and a speed chain; the main body of the speed change mechanism is a gearbox body with a box shell structure, and two parallel shafts are rotatably matched on the gearbox body, which are respectively a driving shaft and a driven shaft, wherein the driven shaft is extended to the second transmission gear side and is coaxially fixedly connected with the second transmission gear, and the driving shaft penetrates the gearbox body and is coaxially fixedly connected with the first transmission gear; the driving shaft is slidably matched with a driving gear inside the gearbox body, and a plurality of groups of driven gears with different numbers of teeth distributed at equal intervals are fixed on the driven shaft; one group of driving gears and one group of driven gears are meshed with a speed chain for transmission.

[0008] Furthermore, in order to maintain the tightness of meshing and avoid chain falling when the speed chain is matched with different driven gears and driving gears, a deflection frame is rotatably matched with a deflection shaft on the gearbox body, and the end of the deflection frame away from the deflection shaft is rotatably matched with a rotating cylinder with a roller structure, the axis line of the rotating cylinder is arranged parallel to the axis line of the driven shaft, the rotating cylinder is in contact with the inner ring of the speed chain, and a first spring is mounted on the end of the deflection frame away from the rotating cylinder, the first spring has a shortening elastic force tendency, and the other end of the first spring is mounted on a connecting strip of a plate structure, and the connecting strip is mounted and fixed on the side of the gearbox body close to the driven gear.

[0009] Furthermore, in order to adjust the tension of the speed chain, the lower surface of the connecting strip is provided with equidistantly distributed buckle teeth, the housing of the gearbox body is provided with a fixing groove for mounting the buckle teeth, and one of the buckle teeth of the connecting strip is mounted on the fixing groove.

[0010] Furthermore, in order to increase the variable speed range of the speed change mechanism, at least two sets of drive gears are provided on the drive shaft, and the number of teeth of all the drive gears on the drive shaft are inconsistent.

[0011] Furthermore, in order to prevent slippage between the drive shaft and the drive gear, which would affect power transmission, the drive shaft is a prismatic structure, and all the drive gears have prismatic holes in their centers that are slidably matched with the drive shaft of the prismatic structure.

[0012] Furthermore, in order to prevent or reduce the chain connection between the second transmission gear and the seeding gear from falling off, it is necessary to tighten the chain connection between the second transmission gear and the seeding gear, and a tensioning mechanism is provided on the seeding rack, and the tensioning mechanism includes: a connecting rod, a pulley, a spring buckle, a fixing pin, a second spring, and a transition gear; the transition gear is rotatably engaged on the seeding rack, and the side of the transition gear is rotatably engaged with a connecting rod through an axle rod, and the other end of the connecting rod is rotatably engaged with a pulley, and the connecting rod is provided with a spring buckle on one side of the pulley, and a second spring is mounted on the spring buckle, and the other end of the second spring is mounted on a fixing pin, which is fixed on the seeding rack, and the second spring has a shortening elastic force tendency, and the descending part of the chain connection between the second transmission gear and the seeding gear passes through the gap between the pulley and the transition gear, and under the action of the second spring, the pulley presses the excess length of the material strip upward and meshes with the transition gear.

[0013] Furthermore, in order to ensure that the seed metering device has sufficient seed sources when working, at least one group of seed bins of a bin box structure is fixed on the frame, and the seed inlet of the seed metering device is connected to the seed bin by a seed guide pipe.

[0014] In summary, the utility model has the following beneficial effects:

[0015] ① The rotation speed of the seeding device can be adjusted, and the application range is wide: through the establishment of the speed change mechanism, when it is necessary to adjust the rotation speed of the seeding gear according to the model of the seeding device, or when the rotation speed of the seeding gear is adjusted according to the seeds to be sown, or when the sowing speed needs to be adjusted; the speed change mechanism can be used to adjust the rotation speed of the seeding gear, thereby increasing the applicable range of the seeder under different conditions.

[0016] ② It can prevent the speed change mechanism from losing power due to chain disengagement: When adjusting the speed change mechanism, stop the walking machine and cut off the power. You can use your hands to pull the speed change chain to disengage it from the originally engaged driven gear. At this time, the rotating cylinder is pulled through the rotating frame and deflected around the deflection axis toward the driven gear side. At this time, due to the leverage effect, the first spring is pulled and lengthened. At this time, the speed change chain is meshed with the new driven gear, and the position corresponding to the driving gear is slid on the drive shaft to make it flush with the meshed new driven gear, and the speed change chain is also meshed on it, and then the speed change chain is released. At this time, the first spring is reset and pulls the upper end of the deflection frame. Under the action of the lever, the rotating cylinder is driven to deflect through the rotating frame around the deflection axis in the direction away from the driven gear, thereby tightening the speed change chain to prevent it from falling off and completing the adjustment of the speed change mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a structural schematic diagram of the tensioning mechanism in the utility model;

[0019] Figure 3 yes Figure 2 A magnified view of the structure in the middle;

[0020] Figure 4 It is a structural schematic diagram of the speed change mechanism in the utility model;

[0021] Figure 5 It is a schematic diagram of the use principle of the speed change mechanism in the utility model;

[0022] Figure 6 It is a schematic diagram of the sliding principle of the driving gear and the driving shaft in the utility model.

[0023] In the figure, 1, frame; 2, speed change mechanism; 3, walking wheel; 4, seeding frame; 5, seed metering device; 6, ground-contacting wheel; 7, wheel shaft gear; 8, first transmission gear; 9, tensioning mechanism; 10, second transmission gear; 11, wheel frame; 12, seed bin; 13, seed guide tube; 14, transition gear; 21, driving shaft; 22, driving gear; 23, driven gear; 24, driven shaft; 25, deflection shaft; 26, deflection frame; 27, rotating cylinder; 28, first spring; 29, gearbox body; 210, connecting strip; 211, fixing groove; 212, buckle; 213, speed change chain; 91, connecting rod; 92, pulley; 93, hanging spring buckle; 94, fixing pin; 95, second spring. DETAILED DESCRIPTION

[0024] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0025] Example:

[0026] See also Figure 1-Figure 6 , the utility model provides a technical solution:

[0027] A seeder with a speed change function comprises: a frame 1 and a speed change mechanism 2; the frame 1 is a seeder frame, on which a plurality of seeding devices 5 are fixed by using a plurality of seeding frames 4, and a ground-contacting wheel 6 of a wheel structure is arranged at the front end of the seeding device 5, and the ground-contacting wheel 6 and the seeding frame 4 are rotatably matched, and a wheel frame 11 is fixed at each end of the frame 1, and a travel wheel 3 is matched at the lower side of each group of wheel frames 11, and a wheel shaft gear 7 is coaxially fixed on the travel wheel 3, and a first transmission gear 8 is matched at the upper side of the wheel frame 11; the wheel shaft gear 7 and the first transmission gear 8 are matched through chain transmission, and a second transmission gear 10 is rotatably matched on the frame 1, and the second transmission gear 10 and a seeding gear 51 of the seeding device 5 (the seeding device 5 is directly applied, and the seeding gear 51 is a gear concentrically connected to the rotating shaft of the seeding device 5, and all the rotating shafts of the seeding devices 5 are coaxially fixed) are matched through chain transmission, and the first transmission gear 8 and the second transmission gear 10 are connected through the speed change mechanism 2.

[0028] In order to realize variable speed transmission, the speed change mechanism 2 includes: a driving shaft 21, a driving gear 22, a driven gear 23, a driven shaft 24, a deflection shaft 25, a deflection frame 26, a rotating cylinder 27, a first spring 28, a gearbox body 29, a connecting strip 210, a fixing groove 211, a buckle 212, and a speed change chain 213; the main body of the speed change mechanism 2 is a gearbox body 29 with a box shell structure, and two parallel shafts are rotatably matched on the gearbox body 29, respectively, the driving shaft 21 and the driven shaft 24, wherein the driven shaft 24 is extended to the side of the second transmission gear 10 and is coaxially fixedly connected with the second transmission gear 10, and the driving shaft 21 penetrates the gearbox body 29 and is coaxially fixedly connected with the first transmission gear 8; the driving shaft 21 is slidably matched with the driving gear 22 inside the gearbox body 29, and a plurality of groups of driven gears 23 with different numbers of teeth distributed at equal intervals are fixed on the driven shaft 24; one group of driving gears 22 and one group of driven gears 23 are meshed and driven by a speed change chain 213.

[0029] In order to maintain the tightness of meshing and avoid chain falling when the speed chain 213 is matched with different driven gears 23 and driving gears 22, a deflection frame 26 is rotatably matched with the deflection shaft 25 on the gearbox body 29, and the end of the deflection frame 26 away from the deflection shaft 25 is rotatably matched with a rotating cylinder 27 with a roller structure. The axis of the rotating cylinder 27 is arranged parallel to the axis of the driven shaft 24, and the rotating cylinder 27 is in contact with the inner ring of the speed chain 213. A first spring 28 is mounted on the end of the deflection frame 26 away from the rotating cylinder 27. The first spring 28 has a shortening elastic tendency, and the other end of the first spring 28 is mounted on a connecting strip 210 with a plate structure. The connecting strip 210 is mounted and fixed on the side of the gearbox body 29 close to the driven gear 23.

[0030] In order to adjust the tension of the speed chain 213, the lower surface of the connecting strip 210 is provided with equally spaced buckle teeth 212, and the shell of the gearbox body 29 is provided with a fixing groove 211 for mounting the buckle teeth 212, and one of the buckle teeth 212 of the connecting strip 210 is mounted on the fixing groove 211.

[0031] In order to increase the variable speed range of the speed change mechanism 2 , at least two groups of driving gears 22 are provided on the driving shaft 21 , and the number of teeth of all the driving gears 22 on the driving shaft 21 are inconsistent.

[0032] In order to prevent slippage between the driving shaft 21 and the driving gear 22 and affect power transmission, the driving shaft 21 is a prismatic structure, and the centers of all the driving gears 22 are provided with prism holes that slide with the driving shaft 21 of the prismatic structure.

[0033] In order to prevent or reduce the chain connection between the second transmission gear 10 and the seeding gear 51 from falling off, it is necessary to tighten the chain connection between the second transmission gear 10 and the seeding gear 51. A tensioning mechanism 9 is provided on the seeding rack 4. The tensioning mechanism 9 includes: a connecting rod 91, a pulley 92, a hanging spring buckle 93, a fixing pin 94, a second spring 95, and a transition gear 96; the transition gear 96 is rotatably engaged on the seeding rack 4, and the side of the transition gear 96 is rotatably engaged with the connecting rod 91 through the shaft rod, and the other end of the connecting rod 91 is rotatably engaged with Pulley 92, connecting rod 91 is provided with a spring buckle 93 on one side of pulley 92, and a second spring 95 is mounted on the spring buckle 93. The other end of the second spring 95 is mounted on a fixing pin 94, and the fixing pin 94 is fixed on the seeding rack 4. The second spring 95 has a shortening elastic force tendency, and the downward portion of the chain connecting the second transmission gear 10 and the seeding gear 51 passes through the gap between the pulley 92 and the transition gear 96. Under the action of the second spring 95, the pulley 92 presses the excess length of the material strip upward and engages with the transition gear 96.

[0034] In order to ensure that the seed metering device 5 has sufficient seed sources when working, at least one group of seed bins 12 of a bin box structure is fixed to the frame 1, and the seed inlet of the seed metering device 5 is connected to the seed bin 12 through a seed guide tube 13.

[0035] Brief description of the usage process:

[0036] When in use, the seed bin 12 is filled with seeds, and the utility model is installed as a whole on a walking machine (generally an agricultural tractor or a seeding vehicle) through the frame 1 to ensure that the walking wheel 3 and the ground-contacting wheel 6 are in contact with the sowing ground. When the walking machine moves, the ground-contacting wheel 6 is pushed to roll on the ground, and then the wheel axle gear 7 on the ground-contacting wheel 6 follows the rotation, and the wheel axle gear 7 drives the first transmission gear 8 to rotate through a chain, and the first transmission gear 8 drives the driving gear 22 coaxial with it to rotate through the driving shaft 21, and the driving gear 22 drives the driven gear 23 connected to it through the speed chain 213 to rotate, and the driven gear 23 drives the second transmission gear 10 coaxial with it to rotate through the driven shaft 24, and the second transmission gear 10 drives the seeding gear 51 of the seeding device 5 to rotate through the chain.

[0037] The seeding device 5 obtains the rotational power from the seeding gear 51 and starts the seeding operation. The seeding operation is performed on a route under the walking action of the walking wheel 3. The seed bin 12 provides a continuous seed source for the seeding device 5 through the seed guide tube 13.

[0038] When it is necessary to adjust the rotation speed of the seeding gear 51 according to the model of the seeding device 5, or to adjust the rotation speed of the seeding gear 51 according to the seeds to be sown, or to adjust the sowing speed; the speed change mechanism 2 can be used to adjust the rotation speed of the seeding gear 51.

[0039] When adjusting the speed change mechanism 2, the walking machine is stopped and the power is cut off. The speed change chain 213 can be pulled by hand to disengage it from the originally engaged driven gear 23. At this time, the rotating cylinder 27 is pulled through the rotating frame 26 to deflect toward the driven gear 23 around the deflection axis 25. At this time, due to the leverage effect, the first spring 28 is pulled and lengthened. At this time, the speed change chain 213 is meshed with the new driven gear 23, and the position corresponding to the driving gear 22 is slid on the driving shaft 21 to make it flush with the meshed new driven gear 23, and the speed change chain 213 is also meshed thereon, and then the speed change chain 213 is released. At this time, the first spring 28 is reset, pulling the upper end of the deflection frame 26. Under the action of the lever, the rotating cylinder 27 is driven to deflect through the rotating frame 26 around the deflection axis 25 in the direction away from the driven gear 23, thereby tightening the speed change chain 213 to prevent it from falling off.

[0040] After the speed change mechanism 2 is adjusted, the transmission ratio between the first transmission gear 8 and the second transmission gear 10 is changed, thereby changing the transmission ratio between the wheel shaft gear 7 and the seeding gear 51, and adjusting the rotation speed of the seeding gear 51.

[0041] In order to ensure that the tensioning force of the speed chain 213 can be adjusted, when adjusting the tensioning force of the speed chain 213, the buckle teeth 212 mounted on the connecting bar 210 and the fixing groove 211 can be changed to adjust the telescopic length of the first spring 28, and then adjust the elastic force of the first spring 28. Combined with the above principle, the tensioning force of the speed chain 213 can be adjusted.

[0042] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A seed drill with a speed-changing function, comprising: A frame (1) and a speed change mechanism (2); the characteristics are as follows: the frame (1) is a seed drill frame, a plurality of seeding frames (4) are used on the frame (1) to fix a plurality of seeding devices (5), a ground-contacting wheel (6) of a wheel structure is provided at the front end of the seeding device (5), the ground-contacting wheel (6) and the seeding frame (4) are rotatably matched, a wheel frame (11) is fixed at each end of the frame (1), a travel wheel (3) is matched at the lower side of each wheel frame (11), a wheel shaft gear (7) is coaxially fixed on the travel wheel (3), and a first transmission gear (8) is matched at the upper side of the wheel frame (11); the wheel shaft gear (7) and the first transmission gear (8) are matched through chain transmission, a second transmission gear (10) is rotatably matched on the frame (1), the second transmission gear (10) and the seeding gear (51) of the seeding device (5) are matched through chain transmission, and the first transmission gear (8) and the second transmission gear (10) are connected through the speed change mechanism (2).

2. A seed drill with a speed-changing function according to claim 1, characterized in that: The speed change mechanism (2) comprises: a driving shaft (21), a driving gear (22), a driven gear (23), a driven shaft (24), a deflection shaft (25), a deflection frame (26), a rotating cylinder (27), a first spring (28), a gearbox body (29), a connecting strip (210), a fixing groove (211), a clasp (212), and a speed change chain (213); the main body of the speed change mechanism (2) is a gearbox body (29) with a box shell structure, and two shafts parallel to each other are rotatably matched on the gearbox body (29), which are the driving shaft (21) and the driven shaft (24). A shaft (24), wherein the driven shaft (24) is extended to the side of the second transmission gear (10) and is coaxially fixedly connected to the second transmission gear (10), and the driving shaft (21) penetrates the gearbox body (29) and is coaxially fixedly connected to the first transmission gear (8); the driving shaft (21) is slidably matched with the driving gear (22) inside the gearbox body (29), and a plurality of groups of driven gears (23) with different numbers of teeth distributed at equal intervals are fixed on the driven shaft (24); one group of the driving gears (22) and one group of the driven gears (23) are meshed and driven by a speed change chain (213).

3. A seed drill with a speed-changing function according to claim 2, characterized in that: The gearbox body (29) is provided with a deflection frame (26) rotatably matched with the deflection shaft (25); one end of the deflection frame (26) away from the deflection shaft (25) is rotatably matched with a rotating cylinder (27) with a roller structure; the axis of the rotating cylinder (27) is arranged parallel to the axis of the driven shaft (24); the rotating cylinder (27) and the inner ring of the speed change chain (213) are in contact and matched; one end of the deflection frame (26) away from the rotating cylinder (27) is mounted with a first spring (28); the first spring (28) has a shortening elastic force tendency; the other end of the first spring (28) is mounted on a connecting strip (210) with a plate structure; the connecting strip (210) is mounted and fixed on a side of the gearbox body (29) close to the driven gear (23).

4. A seed drill with a speed-changing function according to claim 3, characterized in that: The lower surface of the connecting strip (210) is provided with equidistantly distributed buckle teeth (212), the housing of the gearbox body (29) is provided with a fixing groove (211) for mounting the buckle teeth (212), and one of the buckle teeth (212) of the connecting strip (210) is mounted on the fixing groove (211).

5. The seed drill with speed change function according to claim 2, characterized in that: At least two groups of driving gears (22) are provided on the driving shaft (21), and the number of teeth of all the driving gears (22) on the driving shaft (21) are inconsistent.

6. A seed drill with a speed-changing function according to claim 5, characterized in that: The driving shaft (21) is a prism structure, and all driving gears (22) are provided with prism holes at their centers for sliding fit with the driving shaft (21) of the prism structure.

7. The seed drill with speed change function according to claim 1, characterized in that: The seeding frame (4) is provided with a tensioning mechanism (9), which comprises: a connecting rod (91), a pulley (92), a spring buckle (93), a fixing pin (94), a second spring (95), and a transition gear (96); the transition gear (96) is rotatably engaged with the seeding frame (4), a connecting rod (91) is rotatably engaged with the side of the transition gear (96) through a shaft, the other end of the connecting rod (91) is rotatably engaged with the pulley (92), the connecting rod (91) is provided with a spring buckle (93) on one side of the pulley (92), and the spring buckle A second spring (95) is mounted on (93), and the other end of the second spring (95) is mounted on a fixing pin (94). The fixing pin (94) is fixed on the seeding frame (4). The second spring (95) has an elastic tendency to shorten. The downward portion of the chain connecting the second transmission gear (10) and the seeding gear (51) passes through the gap between the pulley (92) and the transition gear (96). Under the action of the second spring (95), the pulley (92) presses the excess length of the chain upward and meshes with the transition gear (96).

8. The seed drill with speed change function according to claim 1, characterized in that: At least one group of seed bins (12) of a bin box structure is fixed on the frame (1), and the seed inlet of the seed metering device (5) is connected to the seed bin (12) by a seed guide pipe (13).

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