Row spacing adjustment device for a multi-row seeder

Abstract

The present invention discloses a row spacing adjusting device for a multi-row seeder, which comprises a machine base and four seat bodies installed on the machine base for installing furrowing and sowing mechanisms; a regulating mechanism for changing the distance between the seat bodies is further installed on the machine base; the regulating mechanism comprises a motor, a first driving gear and a rack connecting the seat bodies; the second seat body is a reference seat body, and the other seat bodies can translate relative to the reference seat body; first movable racks are respectively fixed on the first seat body and the third seat body, and the two first movable racks are respectively arranged on both sides of the center of the first driving gear and are both meshed with the first driving gear; the regulating mechanism further comprises a driven gear, and the driven gear can move along with the first movable rack corresponding to the third seat body; a first fixed rack and a second movable rack meshed with the driven gear are respectively arranged on both sides of the center of the driven gear; the second movable rack is connected to the fourth seat body. The present invention can use one motor to change the distance between the four seat bodies, with low cost and high precision.

Description

Technical Field

[0001] The present invention relates to the technical field of agricultural machinery, and particularly relates to a row spacing adjusting device for a multi-row seeder. Background Art

[0002] Seeders have been widely used in the agricultural field. In order to improve the operation efficiency, multiple seeding devices are often set up to perform multi-row seeding simultaneously. Since the row spacing requirements are different for different crops and different scenarios, it is necessary to adjust the spacing between the seeding devices. In the prior art, generally, the spacing of the seeding devices needs to be adjusted manually. In this way, not only the operation is troublesome, the accuracy is low, but also it is difficult to meet the need for temporarily adjusting the row spacing. Patent CN 102498802 A discloses an automatic row spacing adjusting system for a seeder. In this patent, there are multiple driving units on the adjusting crossbeam. Each driving unit includes a motor and a gear driven by the motor. A rack is also installed on the adjusting crossbeam. The position of the driving unit relative to the adjusting crossbeam is adjusted through the meshing of the gear and the rack. In this solution, a motor needs to be set for each seeding device, which will increase the cost and control complexity, and the failure rate will also increase accordingly. Summary of the Invention

[0003] Object of the Invention: In order to overcome the deficiencies existing in the prior art, the present invention provides a row spacing adjusting device for a multi-row seeder with low cost and simple control.

[0004] Technical Solution: To achieve the above object, a row spacing adjusting device for a multi-row seeder of the present invention includes a machine base and four seat bodies installed on the machine base for installing ditch-opening and seeding and planting mechanisms. The four seat bodies are sequentially the first seat body, the second seat body, the third seat body, and the fourth seat body; an adjusting mechanism for changing the spacing between the seat bodies is also installed on the machine base; the adjusting mechanism includes a motor, a first driving gear, and a rack connecting the seat bodies;

[0005] The second seat body is the reference seat body, and the other seat bodies can perform translational motion relative to the reference seat body;

[0006] First movable racks are respectively fixed on the first seat body and the third seat body, that is, there are two first movable racks in total. The two first movable racks are respectively located on both sides of the center of the first driving gear and are both meshed with the first driving gear;

[0007] The adjusting mechanism further includes a driven gear, which can move along with the first moving rack corresponding to the third seat body and can rotate relative to the first moving rack; on both sides of the center of the driven gear, a first fixed rack and a second moving rack meshing with it are respectively arranged, and the first fixed rack and the second moving rack are parallel; the second moving rack is connected to the fourth seat body. The first fixed rack is fixed relative to the reference seat body.

[0008] Further, two groups of first sliding rails are fixed on the machine base, and the two groups of first sliding rails are respectively arranged on the upper and lower sides of the adjusting mechanism; on each sliding seat body, a first slider respectively slidingly matched with the two groups of first sliding rails is fixed, which can effectively improve the sliding stability of the seat body and has high structural reliability.

[0009] With the above structure, when the motor drives the first driving gear to rotate, the first driving gear can make the two first moving racks move at the same speed in opposite directions, that is, make the first seat body and the third seat body move at the same speed in opposite directions; due to the movement of the first moving rack corresponding to the third seat body, the driven gear on the first moving rack translates with it, and the combined action of the driven gear and the first fixed rack makes the second moving rack translate, and the movement speed of the second moving rack is twice the speed of the first moving rack on the same side. Thus, the displacement of the second moving rack is also twice the displacement of the first moving rack on the same side. It can be seen that with the above structure, the distance between adjacent seat bodies among the four seat bodies can be synchronously enlarged, the adjustment is accurate, and the number of motors is effectively reduced, which can save costs, reduce the control difficulty and the failure rate of the system.

[0010] In one scheme, the above-mentioned reference seat body is fixedly installed relative to the machine base, so that the other seat bodies are distributed dispersedly to both sides relative to the reference seat body.

[0011] Further, in another scheme, the row spacing adjusting device further includes a frame, the machine base can slide left and right relative to the frame, and the motor is installed on the second seat body; in addition to the first driving gear, a second driving gear is also installed on the output shaft of the motor, and the pitch circle radius of the second driving gear is half of the pitch circle radius of the first driving gear, and a second fixed rack meshing with the second driving gear is fixed on the machine base. The second fixed rack and the first moving rack corresponding to the third seat body are on the same side of the central axis of the first driving gear; when the motor operates, relative to the frame, the translation direction of the second seat body is opposite to the translation direction of the third seat body, and the translation displacement of the second seat body is half of the translation displacement of the third seat body. Thus, the symmetry center of the four seat bodies can be kept unchanged relative to the machine base.

[0012] Furthermore, two sets of second sliding rails are installed on the frame, and the two sets of second sliding rails are arranged vertically; second sliders respectively cooperating with the two sets of second sliding rails are installed on the base. The second driving gear and the second fixed rack are disposed between the two sets of second sliding rails, so as to ensure the stability and reliability of the structure.

[0013] Furthermore, a hanging mechanism is provided on the front side of the frame.

[0014] Furthermore, the driven gear is connected to the corresponding first movable rack through a first connecting plate.

[0015] Furthermore, the first seat body is connected to the corresponding first movable rack through a second connecting plate.

[0016] Furthermore, a first guiding slider for guiding the first movable rack is installed on the base.

[0017] Furthermore, a second guiding slider for guiding the second movable rack is installed on the base.

[0018] Beneficial effects: The row spacing adjusting device of the multi-row seeder of the present invention has the following technical effects:

[0019] (1) It is possible to synchronously expand the distances between adjacent seat bodies among the four seat bodies through one motor, with precise adjustment, and effectively reduce the number of motors, which can save costs, reduce the control difficulty and the failure rate of the system.

[0020] (2) In the preferred solution, the base can be moved simultaneously through the same motor, so that the position of the symmetry center of the four seat bodies relative to the frame remains unchanged, avoiding the troubles caused by the change of the symmetry center. Description of the Drawings

[0021] Figure 1 is a three-dimensional structure diagram of the row spacing adjusting device of the multi-row seeder;

[0022] Figure 2 is a front view structure diagram of the row spacing adjusting device of the multi-row seeder;

[0023] Figure 3 is a sectional structure diagram of the row spacing adjusting device of the multi-row seeder.

[0024] In the figure: 1 - machine base; 2 - seat body; 2a - first seat body; 2b - second seat body; 2c - third seat body; 2d - fourth seat body; 3 - adjusting mechanism; 31 - motor; 32 - first driving gear; 33 - first movable rack; 34 - driven gear; 35 - first fixed rack; 36 - second movable rack; 37 - second driving gear; 38 - second fixed rack; 39 - first connecting plate; 310 - second connecting plate; 311 - first guide slider; 312 - second guide slider; 4 - first slide rail; 5 - first slider; 6 - frame; 61 - hanging mechanism; 7 - second slide rail; 8 - second slider. Detailed implementation mode

[0025] The present invention will be further described below with reference to the accompanying drawings.

[0026] As Figures 1 - 3 shown in the row spacing adjusting device of the multi - row seeding machine, it includes a machine base 1 and four seat bodies 2 installed on the machine base 1 for installing the furrowing and seeding mechanism. The four seat bodies 2 are sequentially the first seat body 2a, the second seat body 2b, the third seat body 2c, and the fourth seat body 2d; an adjusting mechanism 3 for changing the distance between the seat bodies 2 is also installed on the machine base 1; the adjusting mechanism 3 includes a motor 31, a first driving gear 32, and a rack connecting the seat bodies 2.

[0027] Specifically, the second seat body 2b is the reference seat body, and the other seat bodies 2 can perform translational motion relative to the reference seat body; first movable racks 33 are respectively fixed on the first seat body 2a and the third seat body 2c, that is, there are two first movable racks 33 in total. The two first movable racks 33 are respectively located on both sides of the center of the first driving gear 32 and are both engaged with the first driving gear 32; the adjusting mechanism 3 further includes a driven gear 34. The driven gear 34 can move along with the first movable rack 33 corresponding to the third seat body 2c, and the driven gear 34 can rotate relative to the first movable rack 33; first fixed racks 35 and a second movable rack 36 meshing with the driven gear 34 are respectively arranged on both sides of the center of the driven gear 34, and the first fixed rack 35 and the second movable rack 36 are parallel; the second movable rack 36 is connected to the fourth seat body 2d.

[0028] Two groups of first slide rails 4 are fixed on the machine base 1, and the two groups of first slide rails 4 are respectively located on the upper and lower sides of the adjusting mechanism 3; first sliders 5 respectively slidingly engaged with the two groups of first slide rails 4 are fixed on each sliding seat body 2, which can effectively improve the sliding stability of the seat body 2 and has high structural reliability.

[0029] The driven gear 34 is connected to the corresponding first movable rack 33 through a first connecting plate 39. The first base 2a is connected to the corresponding first movable rack 33 through a second connecting plate 310. A first guide slide 311 for guiding the first movable rack 33 is installed on the machine base 1. A second guide slide 312 for guiding the second movable rack 36 is installed on the machine base 1.

[0030] With the above structure, when the motor 31 drives the first driving gear 32 to rotate, the first driving gear 32 can make the two first movable racks 33 move at the same speed in opposite directions, that is, make the first base 2a and the third base 2c move at the same speed in opposite directions; due to the movement of the first movable rack 33 corresponding to the third base 2c, the driven gear 34 on the first movable rack 33 translates with it, and the combined action of the driven gear 34 and the first fixed rack 35 makes the second movable rack 36 translate, and the movement speed of the second movable rack 36 is twice the speed of the first movable rack 33 on the same side. Thus, the displacement of the second movable rack 36 is also twice the displacement of the first movable rack 33 on the same side. It can be seen that with the above structure, the distance between adjacent seats 2 among the four seats 2 can be synchronously enlarged, the adjustment is accurate, and the number of motors is effectively reduced, which can save costs, reduce the control difficulty and the failure rate of the system.

[0031] In one embodiment, the above reference seat is fixedly installed relative to the machine base 1, so that the other seats 2 are distributed on both sides relative to the reference seat.

[0032] Preferably, in another embodiment, the row spacing adjusting device further includes a frame 6. The machine base 1 can slide left and right relative to the frame 6. The second base 2b is fixed on the machine base 1. The motor 31 is installed on the second base 2b; in addition to the first driving gear 32, a second driving gear 37 is also installed on the output shaft of the motor 31. The pitch circle radius of the second driving gear 37 is half of the pitch circle radius of the first driving gear 32. A second fixed rack 38 meshing with the second driving gear 37 is fixed on the machine base 1. The second fixed rack 38 and the first movable rack 33 corresponding to the third base 2c are on the same side of the central axis of the first driving gear 32; when the motor 31 operates, relative to the frame 6, the translation direction of the second base 2b is opposite to the translation direction of the third base 2c, and the translation displacement of the second base 2b is half of the translation displacement of the third base 2c. Thus, the symmetry center of the four seats 2 can be kept unchanged relative to the machine base 1.

[0033] Two sets of second slide rails 7 are installed on the frame 6, and the two sets of second slide rails 7 are arranged vertically; second sliders 8 respectively cooperating with the two sets of second slide rails 7 are installed on the machine base 1. The second driving gear 37 and the second fixed rack 38 are placed between the two sets of second slide rails 7, so as to ensure the stability and reliability of the structure.

[0034] A hanging mechanism 61 is provided on the front side of the frame 6, and the hanging mechanism 61 can be connected to a tractor.

[0035] The above are only the preferred embodiments of the present invention. It should be pointed out that: for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A row spacing adjusting device for a multi-row seeder, which comprises a machine base (1) and four seat bodies (2) installed on the machine base (1) for installing ditch-opening and seeding mechanisms. The four seat bodies (2) are sequentially the first seat body (2a), the second seat body (2b), the third seat body (2c), and the fourth seat body (2d); an adjusting mechanism (3) for changing the spacing between the seat bodies (2) is also installed on the machine base (1); the adjusting mechanism (3) includes a motor (31), a first driving gear (32), and a rack connecting the seat body (2). It is characterized in that: The second seat body (2b) is the reference seat body, and the other seat bodies (2) can perform translational motion relative to the reference seat body; First movable racks (33) are respectively fixed on the first seat body (2a) and the third seat body (2c), that is, there are two first movable racks (33) in total. The two first movable racks (33) are respectively located on both sides of the center of the first driving gear (32) and are both meshed with the first driving gear (32); The adjusting mechanism (3) further includes a driven gear (34), and the driven gear (34) can move along with the first movable rack (33) corresponding to the third seat body (2c); a first fixed rack (35) and a second movable rack (36) meshed with the driven gear (34) are respectively arranged on both sides of the center of the driven gear (34); the second movable rack (36) is connected to the fourth seat body (2d); It further includes a frame (6), the machine base (1) can slide left and right relative to the frame (6), and the motor (31) is installed on the second seat body (2b); in addition to the first driving gear (32), a second driving gear (37) is also installed on the output shaft of the motor (31). The pitch circle radius of the second driving gear (37) is half of the pitch circle radius of the first driving gear (32), and a second fixed rack (38) meshed with the second driving gear (37) is fixed on the machine base (1).

2. The row spacing adjusting device of the multi-row seeder according to claim 1, characterized in that, Two groups of first slide rails (4) are fixed on the machine base (1), and the two groups of first slide rails (4) are respectively located on the upper and lower sides of the adjusting mechanism (3); a first slider (5) slidably matched with the two groups of first slide rails (4) is respectively fixed on each sliding seat body (2).

3. The row spacing adjusting device of the multi-row seeder according to claim 1, characterized in that, Two groups of second slide rails (7) are installed on the frame (6), and the two groups of second slide rails (7) are arranged vertically; second sliders (8) respectively matched with the two groups of second slide rails (7) are installed on the machine base (1).

4. The row spacing adjusting device of the multi-row seeder according to claim 3, characterized in that, A hanging mechanism (61) is provided on the front side of the frame (6).

5. The row spacing adjusting device of the multi-row seeder according to claim 1, characterized in that, The driven gear (34) is connected to the corresponding first movable rack (33) through a first connecting plate (39).

6. The row spacing adjusting device of the multi-row seeder according to claim 1, characterized in that, The first seat body (2a) is connected to the corresponding first movable rack (33) through a second connecting plate (310).

7. The row spacing adjusting device of the multi-row seeder according to claim 1, characterized in that, A first guide sliding seat (311) for guiding the first movable rack (33) is installed on the machine base (1).

8. The row spacing adjusting device of the multi-row seeder according to claim 1, characterized in that, A second guide slide base (312) for guiding the second movable rack (36) is mounted on the machine base (1).

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