Land wheel driving device of seeding machine

Abstract

The utility model discloses a planter land wheel driving device which comprises a box body, a speed change mechanism and a land wheel mechanism, the speed change mechanism comprises an input shaft and an output shaft, the input shaft is connected with a fourth chain wheel, a driving chain wheel set capable of sliding axially is installed on the input shaft, and a driven chain wheel set capable of sliding axially is installed on the output shaft. A variable-speed transmission chain tensioned by a chain tensioning assembly is connected between the driving chain wheel group and the driven chain wheel group; the land wheel mechanism comprises a left wheel arm and a right wheel arm, the rear ends of the left wheel arm and the right wheel arm are provided with a land wheel shaft and a land wheel, the land wheel shaft is connected with a first chain wheel, the lower portion of the box body is provided with a driving shaft transversely penetrating out of the two sides of the box body, and the two ends of the driving shaft are provided with a second chain wheel and a third chain wheel respectively. The third sprocket is in transmission connection with the fourth sprocket through a second chain. The land wheel and speed change mechanism integrated design is adopted, the structure is compact, the occupied space is small, speed regulation is convenient, and the failure rate is low.

Description

Technical Field

[0001] The utility model belongs to the technical field of agricultural machinery, in particular to a ground wheel driving device for a seed drill. Background Art

[0002] When the seeder is sowing, in addition to the tractor pulling the seeder forward, it is also necessary to provide rotary power to drive the seeder and fertilizer dispenser to spread seeds and fertilizers. Since the amount of sowing and fertilization is related to the sowing stroke, the seeder and fertilizer dispenser are generally driven by ground wheels. Ground wheel drive is the most common driving method. It can adapt to various terrains and working conditions, provide stable power, and is easy to operate and maintain. Sowing and fertilization are related to crop varieties and cultivation technology solutions. In order to adjust the amount of sowing and fertilization, a speed change mechanism is required.

[0003] In the prior art, the ground wheel drive and the speed change mechanism are two independent mechanisms. The speed change mechanism is often arranged on the seeder and the fertilizer discharge drive shaft. The independent ground wheel drive mechanism and the speed change mechanism require more parts and a complicated assembly process, which leads to an increase in cost. The additional drive mechanism and the speed change mechanism will take up more space and affect the overall design and layout of the seeder. Utility Model Content

[0004] The utility model aims to solve the above-mentioned problems in the prior art and provides a seed drill ground wheel driving device, which adopts an integrated design of a ground wheel and a speed change mechanism, has a compact structure, occupies a small space, is convenient for speed regulation, and has a low failure rate.

[0005] The technical scheme adopted by the utility model is: a ground wheel driving device of a seed drill, which comprises a box body, a speed change mechanism and a ground wheel mechanism, wherein the speed change mechanism comprises an input shaft and an output shaft transversely mounted in the box body through a bearing, the right end of the input shaft extends out of the right side of the box body to connect with a fourth sprocket, and the right end of the output shaft extends out of the right side of the box body to connect with a driving seed drill and a fertilizer dispenser; a driving sprocket group that can slide axially for driving the input shaft to rotate is installed on the input shaft in the box body, and a driven sprocket group that can slide axially for driving the output shaft to rotate is installed on the output shaft in the box body, the driving sprocket group comprises a plurality of toothed discs arranged in sequence from a small number of teeth to a large number of teeth, and the driven sprocket group comprises a plurality of toothed discs arranged in sequence from a large number of teeth to a small number of teeth, and a speed change transmission chain tightened by a chain tightening assembly is connected between the driving sprocket group and the driven sprocket group;

[0006] The ground wheel mechanism comprises a left wheel arm and a right wheel arm, a wheel arm beam is connected in the middle of the left wheel arm and the right wheel arm, a ground wheel shaft is installed at the rear ends of the left wheel arm and the right wheel arm through bearings, a ground wheel is fixedly connected to the ground wheel shaft, a left end of the ground wheel shaft is connected to a first sprocket, a driving shaft that passes horizontally through both sides of the box body is installed at the lower part of the box body through bearings, a left end of the driving shaft is connected to a second sprocket, and a right end of the driving shaft is connected to a third sprocket, a shaft through hole is provided at the front ends of the left wheel arm and the right wheel arm for the driving shaft to pass through, a plurality of arc-shaped bolt holes are arranged in a ring around the shaft through hole, a plurality of bolts passing through the arc-shaped bolt holes are respectively connected to the front ends of the left wheel arm and the right wheel arm by a plurality of bolts passing through the arc-shaped bolt holes to connect them to both sides of the lower part of the box body, an upper wheel arm shaft is horizontally installed at the upper rear part of the box body, and a lead screw support rod with adjustable support height is connected between the upper wheel arm shaft and the wheel arm beam; the first sprocket is connected to the second sprocket through a first chain transmission, and the third sprocket is connected to the fourth sprocket through a second chain transmission;

[0007] The chain tensioning assembly comprises a guide wheel shaft and a tensioning frame shaft which are transversely mounted in the box body, a guide sprocket is mounted on the guide wheel shaft, a tensioning frame is connected to the tensioning frame shaft, tensioning springs are mounted on the tensioning frame shafts on both sides of the tensioning frame, and a tensioning sprocket is mounted on the upper end of the tensioning frame;

[0008] A plurality of open rubber washers for positioning the driving sprocket set are sleeved on the input shaft, and a plurality of open rubber washers for positioning the driven sprocket set are sleeved on the output shaft.

[0009] Preferably, the driving sprocket group includes three toothed discs arranged in order from most to least number of teeth, the left toothed disc has more teeth and the right toothed disc has fewer teeth; the driven sprocket group includes five toothed discs arranged in order from least to most number of teeth, the left toothed disc has fewer teeth and the right toothed disc has more teeth.

[0010] Preferably, the lower wheel arm shaft is installed on the wheel arm beam through a hinge seat, and the two ends of the lead screw support rod are screwed into the threaded holes of the upper wheel arm shaft and the lower wheel arm shaft.

[0011] Preferably, the box body comprises a left box plate and a right box plate, the rear sides of the left box plate and the right box plate are provided with a backward protrusion, and the upper wheel arm shaft is rotatably connected between the two protrusions.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The integrated design of the box, speed change mechanism and ground wheel mechanism of the utility model has the following advantages:

[0014] (1) The speed change mechanism and ground wheel mechanism of the utility model adopt an integrated design, which can reduce the number of parts and components, making the structure of the planter more compact, saving space, and facilitating installation and maintenance.

[0015] (2) The speed change mechanism and ground wheel mechanism of the utility model adopt an integrated design. A ground wheel driving device for driving the seeder is installed on one side of the seeder frame, and a ground wheel driving device for driving the fertilizer dispenser is installed on the other side. The prior art generally installs two ground wheels on the seeder frame, which drive a gearbox together through a transmission shaft, and cannot adjust the seeding amount and fertilizer amount separately.

[0016] (3) The chain tensioning assembly of the utility model comprises a guide wheel shaft and a tensioning frame shaft which are transversely installed in a box body, a guide sprocket is installed on the guide wheel shaft, a tensioning frame is connected to the tensioning frame shaft, tensioning springs are installed on the tensioning frame shafts on both sides of the tensioning frame, a tensioning sprocket is installed on the upper end of the tensioning frame, and the upper end of the tensioning frame extends out from the box body which is open at the upper end, so as to facilitate manual operation to loosen the speed transmission chain, to facilitate transverse movement of the driving sprocket group and the driven sprocket group and to hang the speed transmission chain.

[0017] (4) The utility model sets a number of open rubber washers for limiting the driving sprocket group and the driven sprocket group on the input shaft and the output shaft, and sets a number of open rubber washers for positioning the driven sprocket group. After the speed transmission chain is hung, the open rubber washers are installed on both sides of the driving sprocket group and the driven sprocket group to prevent the driving sprocket group and the driven sprocket group from lateral displacement, effectively solving the problem of chain falling during the sowing operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural schematic diagram of the ground wheel driving device of the seed drill of the utility model from the left rear perspective;

[0019] Figure 2 It is a three-dimensional structural schematic diagram of the ground wheel driving device of the seed drill of the utility model from the right front perspective;

[0020] Figure 3 It is a three-dimensional structural schematic diagram of the utility model without the box body and the ground wheel mechanism;

[0021] Figure 4 It is a three-dimensional structural schematic diagram of the left wheel arm, the right wheel arm and related parts of the utility model.

[0022] In the figure: 1 left box plate, 2 right box plate, 3 input shaft, 4 output shaft, 5 fourth sprocket, 6 driving sprocket group, 7 driven sprocket group, 8 speed transmission chain, 9 left wheel arm, 10 right wheel arm, 11 wheel arm beam, 12 ground wheel shaft, 13 ground wheel, 14 first sprocket, 15 drive shaft, 16 second sprocket, 17 third sprocket, 18 shaft through hole, 19 arc bolt hole, 20 protrusion, 21 upper wheel arm shaft, 22 hinge seat, 23 lower wheel arm shaft, 24 screw support rod, 25 first chain, 26 second chain, 27 open rubber gasket, 28 guide wheel shaft, 29 tensioner shaft, 30 guide sprocket, 31 tensioner, 32 tensioning spring, 33 tensioning sprocket. DETAILED DESCRIPTION

[0023] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.

[0024] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", etc., indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0025] like Figures 1 to 4 As shown, a ground wheel driving device of a seed drill comprises a box body, a speed change mechanism and a ground wheel mechanism. The box body comprises a left box plate 1 and a right box plate 2. The rear sides of the left box plate 1 and the right box plate 2 are provided with a backward protrusion 20.

[0026] The speed change mechanism includes an input shaft 3 and an output shaft 4 which are transversely mounted in the housing through bearings. The right end of the input shaft 3 extends out of the right side of the housing to connect to the fourth sprocket 5, and the right end of the output shaft 4 extends out of the right side of the housing to connect to the driving seeder and the fertilizer dispenser; a driving sprocket set 6 which can slide axially for driving the input shaft 3 to rotate is installed on the input shaft 3 in the housing, and a number of open rubber washers 27 for positioning the driving sprocket set 6 are mounted on the input shaft 3; a driven sprocket set 7 which can slide axially for driving the output shaft 4 to rotate is installed on the output shaft 4 in the housing, and a number of open rubber washers 27 for positioning the driven sprocket set 7 are mounted on the output shaft 4; the driving sprocket set 6 includes three toothed discs arranged in order from most to least number of teeth, and the left toothed disc The number of teeth on the left sprocket is more, and the number of teeth on the right sprocket is less, and the number of teeth on the sprockets is: 26, 18, and 15 respectively; the driven sprocket group 7 includes five sprockets arranged in order from the least to the most, the left sprocket has the least number of teeth, and the right sprocket has the most number of teeth, and the number of teeth on the sprockets is: 18, 23, 28, 30, and 32 respectively; the driving sprocket group 6 and the driven sprocket group 7 are connected by a variable speed transmission chain 8 tightened by a chain tensioning assembly; the chain tensioning assembly includes a guide wheel shaft 28 and a tensioning frame shaft 29 transversely installed in the box body, a guide sprocket 30 is installed on the guide wheel shaft 28, a tensioning frame 31 is connected to the tensioning frame shaft 29, tensioning springs 32 are installed on the tensioning frame shafts 29 on both sides of the tensioning frame 31, and a tensioning sprocket 33 is installed on the upper end of the tensioning frame 31.

[0027] The ground wheel mechanism comprises a left wheel arm 9 and a right wheel arm 10, a wheel arm beam 11 connecting the left wheel arm 9 and the right wheel arm 10, a ground wheel shaft 12 is installed at the rear end of the left wheel arm 9 and the right wheel arm 10 through a bearing, a ground wheel 13 is fixedly connected to the ground wheel shaft 12, a first sprocket 14 is connected to the left end of the ground wheel shaft 12, a drive shaft 15 passing through both sides of the box body is installed at the lower part of the box body through a bearing, a left end of the drive shaft 15 is connected to a second sprocket 16, a right end of the drive shaft 15 is connected to a third sprocket 17, and a drive shaft 15 is provided at the front end of the left wheel arm 9 and the right wheel arm 10. The left wheel arm 9 and the right wheel arm 10 are connected to the two sides of the lower part of the box body by three bolts passing through the arc-shaped bolt holes 19 at the front ends thereof, an upper wheel arm shaft 21 is installed horizontally between the two protrusions 20 at the upper rear part of the box body, a lower wheel arm shaft 23 is installed on the wheel arm beam 11 through a hinge seat 22, a screw support rod 24 with adjustable support height is connected between the upper wheel arm shaft 21 and the lower wheel arm shaft 23; both ends of the screw support rod 24 are screwed into the threaded holes of the upper wheel arm shaft 21 and the lower wheel arm shaft 23.

[0028] The first sprocket 14 is connected to the second sprocket 16 via a first chain 25 , and the third sprocket 17 is connected to the fourth sprocket 5 via a second chain 26 .

[0029] The operation method of adjusting the transmission ratio of the gearbox of the utility model is as follows:

[0030] (1) Remove all or part of the open rubber washers 27 on the input shaft 3 and the output shaft 4;

[0031] (2) The manual tensioning frame 31 compresses the tensioning spring 32 to relax the speed transmission chain 8;

[0032] (3) Move the toothed disc to be connected between the driving sprocket set 6 and the driven sprocket set 7 to the center position so that it is in a vertical plane with the guide sprocket 30 and the tensioning sprocket 33, and hang the speed change transmission chain 8 connected to the guide sprocket 30 and the tensioning sprocket 33 on the toothed disc at the center position of the driving sprocket set 6 and the driven sprocket set 7;

[0033] (4) Release the tensioning frame 31. Under the action of the tensioning spring 32, the speed transmission chain 8 is tightened and connected to the driving sprocket set 6, the driven sprocket set 7, the guide sprocket 30 and the tensioning sprocket 33;

[0034] (5) According to the left and right spacing between the driving sprocket set 6 and the driven sprocket set 7, install open rubber washers 27 on the input shaft 3 and the output shaft 4 to prevent the driving sprocket set 6 and the driven sprocket set 7 from sliding left and right during operation and to prevent the chain from shifting.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model.

Claims

1. A ground wheel driving device for a seed drill, comprising a housing, a speed change mechanism and a ground wheel mechanism, wherein the speed change mechanism comprises an input shaft and an output shaft transversely mounted in the housing through a bearing, the right end of the input shaft extends out of the right side of the housing to connect to a fourth sprocket, and the right end of the output shaft extends out of the right side of the housing to connect to a driving seed drill and a fertilizer dispenser; a driving sprocket group that can slide axially for driving the input shaft to rotate is installed on the input shaft in the housing, and a driven sprocket group that can slide axially for driving the output shaft to rotate is installed on the output shaft in the housing, the driving sprocket group comprises a plurality of toothed discs arranged in sequence from a small number of teeth to a large number of teeth, the driven sprocket group comprises a plurality of toothed discs arranged in sequence from a large number of teeth to a small number of teeth, and a speed change transmission chain that is tightened by a chain tightening assembly is linked between the driving sprocket group and the driven sprocket group; The ground wheel mechanism comprises a left wheel arm and a right wheel arm, a wheel arm beam is connected in the middle of the left wheel arm and the right wheel arm, a ground wheel shaft is installed at the rear ends of the left wheel arm and the right wheel arm through bearings, a ground wheel is fixedly connected to the ground wheel shaft, a left end of the ground wheel shaft is connected to a first sprocket, a driving shaft that passes horizontally through both sides of the box body is installed at the lower part of the box body through bearings, a left end of the driving shaft is connected to a second sprocket, and a right end of the driving shaft is connected to a third sprocket, a shaft through hole is provided at the front ends of the left wheel arm and the right wheel arm for the driving shaft to pass through, a plurality of arc-shaped bolt holes are arranged in a ring around the shaft through hole, a plurality of bolts passing through the arc-shaped bolt holes are respectively connected to the two sides of the lower part of the box body at the front ends of the left wheel arm and the right wheel arm, an upper wheel arm shaft is horizontally installed at the upper rear part of the box body, and a lead screw support rod with adjustable support height is connected between the upper wheel arm shaft and the wheel arm beam; the first sprocket is connected to the second sprocket through a first chain transmission, and the third sprocket is connected to the fourth sprocket through a second chain transmission; The chain tensioning assembly comprises a guide wheel shaft and a tensioning frame shaft which are transversely mounted in the box body, a guide sprocket is mounted on the guide wheel shaft, a tensioning frame is connected to the tensioning frame shaft, tensioning springs are mounted on the tensioning frame shafts on both sides of the tensioning frame, and a tensioning sprocket is mounted on the upper end of the tensioning frame; A plurality of open rubber washers for positioning the driving sprocket set are sleeved on the input shaft, and a plurality of open rubber washers for positioning the driven sprocket set are sleeved on the output shaft.

2. The planter ground wheel driving device according to claim 1, characterized in that The driving sprocket group includes three toothed discs arranged in order from most to least number of teeth, the left toothed disc has more teeth and the right toothed disc has fewer teeth; the driven sprocket group includes five toothed discs arranged in order from least to most number of teeth, the left toothed disc has fewer teeth and the right toothed disc has more teeth.

3. The planter ground wheel driving device according to claim 2, characterized in that The lower wheel arm shaft is installed on the wheel arm beam through a hinge seat, and the two ends of the screw support rod are screwed into the threaded holes of the upper wheel arm shaft and the lower wheel arm shaft.

4. The planter ground wheel driving device according to claim 3, characterized in that The box body comprises a left box plate and a right box plate, and the rear sides of the left box plate and the right box plate are provided with a backward protrusion, and the upper wheel arm shaft is rotatably connected between the two protrusions.

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