Finger clamping type seed sowing device

Abstract

The invention relates to the technical field of agricultural machinery, and particularly discloses a finger clamp type seed sowing device which comprises a shell, an outer cover, a transmission shaft and a driven chain wheel, and further comprises a plurality of seed clamping and sowing combination bodies arranged in the circumferential direction of the transmission shaft, each seed clamping and sowing combination body comprises a low clamp, a finger clamp and a torsional spring, the low clamp comprises a hollow pipe, and the finger clamp is arranged in the hollow pipe; the axial direction of the hollow pipe is the same as the radial direction of the transmission shaft, one end of the hollow pipe is fixedly provided with a low clamping piece, and the other end of the hollow pipe is fixedly provided with a low clamping seed-metering shifting fork and a low clamping seed-filling shifting fork; the finger clamp comprises a connecting rod, the connecting rod penetrates through the hollow pipe, the finger clamp is fixedly arranged at one end of the connecting rod, and a finger clamp shifting fork is fixedly arranged at the other end of the connecting rod; according to the finger clamping type seed-metering device, the finger clamping piece and the low clamping piece are used for clamping seeds, a double-clamping-piece clamping mode is adopted, and compared with an existing single-finger pressing and pushing type finger clamping type seed-metering device, the clamping force between the seeds and the finger clamping piece and the clamping force between the seeds and the low clamping piece are moderate, and the seeds are not prone to being damaged.

Description

Technical Field

[0001] The invention belongs to the technical field of agricultural machinery, and in particular relates to a finger-clamp type seed metering device. Background Art

[0002] As a major agricultural country, my country has many crops that require precision seeding. For example, corn, soybeans, sorghum, cotton, rapeseed, cabbage and peanuts are all typical crops that require precision seeding.

[0003] The existing seeding methods of the seeder are divided into spoon wheel type, finger clamp type, spoon clamp type, air suction type and air blowing type. Although the spoon wheel type, finger clamp type and spoon clamp type seeding devices have greatly improved the seeding speed and seeding accuracy compared with the traditional seeding method, there are still certain defects in performance and structure. For example, the spoon wheel type seeding device is not suitable for high-speed sowing and has poor vibration resistance. The finger clamp type seeding device and the spoon clamp type seeding device are improved in sowing speed and sowing accuracy than the spoon type seeding device, but there is a big gap in performance with the air suction type seeding device. The wear between the parts in the mechanical structure of the finger clamp type and the spoon clamp type seeding device is relatively serious, and the driving unit power required is large. The air suction type seeding device has the best performance among these seeding devices. The air suction type seeding device also has its application limitations, such as the required supporting agricultural machinery has large power and is not suitable for small horsepower agricultural machinery. Seeders with 4 rows or less basically use spoon wheel type, finger clamp type or spoon clamp type seeding devices. Among these three seeding devices, the finger clamp type seeding device has the best performance.

[0004] However, the existing finger-clip seeding devices are not suitable for low-speed sowing, lead powder must be used for lubrication, and the internal slip ring mechanism design is unreasonable. From the perspective of bionic principles, the existing finger-clip seeding devices are single-finger pressing and pushing types, and the friction between the seeds and the bottom plate of the finger-clip disk is large, which is easy to damage the seed coating and the seed embryo. Therefore, a finger-clip seeding device is proposed. Summary of the invention

[0005] The object of the present invention is to provide a finger-clamp type seed metering device to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A finger-clamp type seed metering device comprises a housing, an outer cover, a transmission shaft and a driven sprocket, and also comprises:

[0008] A plurality of clamping and seeding assemblies arranged along the circumference of the transmission shaft, each of which comprises a low clamp, a finger clamp and a torsion spring, the low clamp comprising a hollow tube, the axial direction of the hollow tube being the same as the radial direction of the transmission shaft, a low clamping sheet being fixedly arranged at one end of the hollow tube, and a low clamping and seeding fork and a low clamping and seed filling fork being fixedly arranged at the other end;

[0009] The finger clamp comprises a connecting rod, the connecting rod passes through the hollow tube, one end of the connecting rod is fixed with a finger clamp, the other end is fixed with a finger clamp fork, the torsion spring is sleeved on the connecting rod, one end of the torsion spring abuts against the finger clamp fork, and the other end abuts against the low clamp seeding fork;

[0010] A pressure plate located between the shell and the outer cover, the pressure plate being fixedly connected to one end of the transmission shaft, the pressure plate being provided with a first slot corresponding to each hollow tube, and the hollow tube passing through the corresponding first slot;

[0011] A seed guide disc, wherein each hollow tube of the seed guide disc is provided with a second clamping groove, the hollow tube passes through the corresponding second clamping groove, and the seed guide disc is fixedly connected to the pressure disc; a seed guide chamber corresponding to the seed-discharging assembly is circumferentially provided on one side of the seed guide disc away from the pressure disc, and the seed guide chamber is provided with an opening that can communicate with the seed-discharging port; a through hole is provided on the seed guide disc corresponding to each seed guide chamber, and the seeds clamped by the finger clamp and the low clamp can enter the seed guide chamber through the through hole;

[0012] A slip ring mechanism, wherein the slip ring mechanism is used to adjust the angle between the finger clamp piece and the low clamp piece by toggling the low clamp seed discharging fork, the low clamp seed discharging fork and the finger clamp fork, and the finger clamp piece cooperates with the low clamp piece to clamp and discharge seeds;

[0013] The transmission shaft is connected to the ground wheel on the seeder through a chain transmission mechanism; the chain transmission mechanism includes a chain, a driving sprocket fixed on the ground wheel rotating shaft and a driven sprocket fixedly sleeved on the transmission shaft, the chain is wound around the driving sprocket and the driven sprocket, and the driven sprocket is provided with a lubrication alarm mechanism for lubricating the outer wall of the driven sprocket when it rotates.

[0014] Preferably, the slip ring mechanism comprises a low-clamp inner slip ring, a low-clamp outer slip ring and a finger-clamp slip ring;

[0015] The low clamp inner slip ring is fixedly installed on the inner side of the shell, and the side of the low clamp inner slip ring away from the shell is divided into a first seed filling clamping area and a first seed row area along the circumferential direction, the first seed row area is more protruding than the first seed filling clamping area, and the first seed row area is used for sliding cooperation with the low clamp seed row fork. When the low clamp seed row fork and the first seed row area are slidably cooperated, the angle between the low clamp piece and the finger clamp piece increases; a vibration area is provided in the middle of the first seed row area, and the surface of the vibration area is uneven, so that the vibration area with an uneven surface can make the low clamp seed row fork vibrate, thereby improving the seed row effect;

[0016] The seed-discharging clamping assembly is located between the low clamp inner slip ring and the low clamp outer slip ring. The low clamp outer slip ring is provided with a second seed-filling clamping area and a second seed-discharging area on the side facing the seed-discharging clamping assembly. The second seed-filling clamping area is more protruding than the second seed-discharging area. The second seed-filling clamping area is used for slidingly cooperating with the low clamp seed-filling fork. When the low clamp seed-filling fork and the second seed-filling clamping area are slidably cooperating, the angle between the low clamp piece and the finger clamp piece is reduced.

[0017] The finger clamp slip ring is coaxially fixedly connected with the low clamp outer slip ring. The finger clamp slip ring is provided with a seed filling area and a clamping seed filling area on the side facing the seed clamping assembly. The seed filling area is more protruding than the clamping seed filling area. The seed filling area is used for sliding cooperation with the finger clamp fork. When the finger clamp fork slides with the seed filling area, the angle between the low clamp piece and the finger clamp piece is reduced.

[0018] Preferably, the seed metering device further comprises a finger clamp opening adjustment mechanism, which can drive the finger clamp sliding ring to move axially along the transmission shaft;

[0019] The finger clamp opening adjustment mechanism comprises a knob, an adjustment fork and an adjustment ring, wherein the adjustment ring is coaxially arranged with the finger clamp sliding ring, the outer circumference of the adjustment ring is threadedly matched with the inner circumference of the finger clamp sliding ring, one end of the adjustment fork is clamped or fixedly connected with the fork clamping groove, and the knob is connected with the other end of the adjustment fork through a spring;

[0020] The shell is provided with an arc-shaped bar hole corresponding to the knob, and the knob is slidably matched with the arc-shaped bar hole. The shell is also provided with a plurality of positioning holes corresponding to the knob. The knob is connected to the other end of the adjustment fork through a spring. A positioning head is fixed on the knob, and the positioning head can be inserted into any positioning hole.

[0021] Preferably, the transmission shaft, housing, seed guide plate, pressure plate, low clamp inner slip ring, low clamp outer slip ring and finger clamp slip ring are all coaxially arranged, and the first seed row area and the first seed filling clamping area, the second seed row area and the second seed filling clamping area, and the seed filling area and the clamping seed row area are all smoothly connected.

[0022] Preferably, the seed metering device also includes a driving mechanism for driving the seed guide disk to rotate, and the driving mechanism is used to drive the seed guide disk to rotate. The driving mechanism specifically includes a motor and a driving gear fixedly arranged on the output shaft of the motor and an inner gear ring fixedly arranged on the seed guide disk. The motor is fixedly mounted on a motor mounting seat on the housing, and the driving gear is meshed with the inner gear ring.

[0023] Preferably, the first seed row area and the first seed filling clamping area, the second seed row area and the second seed filling clamping area, and the seed filling area and the clamping seed row area are all smoothly connected, the shell is provided with a seed row opening, one side of the shell is open, the outer cover is used to snap on the open side of the shell, the outer cover is provided with a seed inlet tube, the transmission shaft is rotatably matched with the shell; the transmission shaft is connected to the ground wheel on the seeder through a chain transmission mechanism.

[0024] Preferably, the lubrication alarm mechanism includes a plurality of discharge holes opened on the inner wall of the driven sprocket, the inner wall of the driven sprocket is provided with a discharge port on one side of the discharge port, and the discharge port and the discharge port are correspondingly connected, an atomizing mesh plate is fixedly connected inside the discharge port, the inner wall of the driven sprocket is fixedly connected with tension springs on both sides of the discharge hole, a sliding rod is fixedly connected between the two tension springs, a movable mesh plate is slidably connected to the outer wall of the sliding rod, a fitting baffle is fixedly connected to the bottom end of the sliding rod, a telescopic sleeve is fixedly connected to the bottom of the inner wall of the driven sprocket, a limiting slide is slidably connected to the inside of the telescopic sleeve, one side of the limiting slide is fixedly connected with the telescopic rod, and an end of the telescopic rod away from the limiting slide slides and extends to the outside of the telescopic sleeve, an alarm switch is provided at the bottom of the inner wall of the telescopic sleeve, and an end of the sliding rod away from the fitting baffle is fixedly connected to a top plate.

[0025] Preferably, the outer wall of the fitting baffle and the inner wall of the agent outlet hole are slidingly fitted, and the outer wall diameter of the sliding rod is smaller than the inner wall diameter of the agent outlet hole.

[0026] Preferably, the inner wall diameter of the agent outlet hole is smaller than the inner wall diameter of the agent outlet port, and the movable mesh plate and the atomizing mesh plate are both provided with a plurality of mesh holes.

[0027] Preferably, the outer side wall of the limiting slide and the inner side wall of the telescopic sleeve are slidably fitted, the limiting slide and the alarm switch are correspondingly extruded, and one end of the telescopic rod away from the limiting slide is connected to the movable mesh plate.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] The finger-clamping seed metering device of the present invention clamps seeds by two clamping pieces, namely, a finger clamping piece and a low clamping piece, and is a double-clamping-piece clamping and sending type. Compared with the existing finger-clamping seed metering device of single-finger pressing and pushing type, the clamping force between seeds and the finger clamping piece and the low clamping piece is moderate, and it is not easy to cause damage to seeds. Due to the principle of double-clamping-piece clamping and sending, the present invention has a high single-seed rate and a very low double-seed rate during the seeding process, can adapt to fast and slow sowing, and is not easy to have a missed seed phenomenon during the slow sowing process, and the required driving power is also small.

[0030] The finger-clamp type seed metering device of the present invention is provided with a finger-clamp opening adjustment mechanism. By adjusting the adjustment range of the angle between the finger-clamp plate and the low-clamp plate through the finger-clamp opening adjustment mechanism, the finger-clamp plate and the low-clamp plate can clamp seeds of different sizes and shapes, and has strong adaptability to the size and specific gravity of the seeds; it improves the efficiency of farmland operations, achieves increased crop yields and incomes, and is of great significance to the development of large-scale high-precision agriculture.

[0031] The invention uses the function of the lubrication alarm mechanism, and when the driven sprocket is rotated, the lubricating oil inside the driven sprocket can flow out through the agent outlet hole and the agent outlet port, so as to lubricate the outer wall of the driven sprocket. When the driven sprocket is rotated, the outer wall of the driven sprocket can be lubricated by the lubricating oil flowing out, so as to improve the rotation effect of the driven sprocket and the use efficiency of the finger-clamp type seed metering device.

[0032] When the sliding rod moves toward the outside of the driven sprocket, it can drive the top plate at one end thereof to press the movable mesh plate, thereby causing the movable mesh plate to move inside the driven sprocket, which can promote the flow of lubricating oil inside the driven sprocket, thereby increasing the flow effect of the lubricating oil, thereby improving the effect of the lubricating oil on the driven sprocket.

[0033] As the lubricating oil is used, the lubricating oil level inside the driven sprocket drops, which can cause the movable mesh plate to drive the telescopic rod to slide toward the inside of the telescopic sleeve, causing the limit slide plate to slide and squeeze the alarm switch, causing the alarm switch to sound an alarm, thereby allowing the staff to know the usage of the lubricating oil inside the driven sprocket and making it easier for the staff to add the lubricating oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a structural schematic diagram of the finger-clamp type seed metering device of the present invention;

[0035] Figure 2 It is a structural schematic diagram of the finger-clamp type seed metering device of the present invention;

[0036] Figure 3 An exploded view of the finger-clamp type seed metering device of the present invention;

[0037] Figure 4 It is a structural schematic diagram of a housing in a finger-clamp type seed metering device of the present invention;

[0038] Figure 5 It is a structural schematic diagram of a housing in a finger-clamp type seed metering device of the present invention;

[0039] Figure 6 It is a structural schematic diagram of the seed guide disc in the finger-clamp type seed metering device of the present invention;

[0040] Figure 7It is a structural schematic diagram of the seed guide disc in the finger-clamp type seed metering device of the present invention;

[0041] Figure 8 It is a structural schematic diagram of the clamping seed-discharging assembly in the finger-clamping type seed-discharging device of the present invention;

[0042] Fig. 9 It is an exploded schematic diagram of the seed-feeding assembly of the finger-clamping seed-feeding device of the present invention;

[0043] Fig.10 It is a structural schematic diagram of a pressure plate in a finger-clamp type seed metering device of the present invention;

[0044] Fig.11 It is a structural schematic diagram of the low clamp inner slip ring in the finger clamp type seed metering device of the present invention;

[0045] Fig.12 It is a structural schematic diagram of the low-clamp outer slip ring in the finger-clamp type seed metering device of the present invention;

[0046] Fig.13 The schematic diagram of the structure of the finger-clamp slip ring in the finger-clamp type seed metering device of the present invention is

[0047] Fig.14 It is a structural schematic diagram of an adjusting ring in a finger-clamp type seed metering device of the present invention;

[0048] Fig.15 It is a working principle diagram of the clamping seed-discharging assembly in the finger-clamping type seed-discharging device of the present invention;

[0049] Fig.16 It is a partial structural schematic diagram of the finger-clamp type seed metering device of the present invention;

[0050] Fig.17 It is a schematic cross-sectional structural diagram of the driven sprocket of the present invention;

[0051] Fig.18 For the present invention Fig.17 Schematic diagram of the enlarged structure at point A.

[0052] Among them, 1. Shell; 2. Transmission shaft; 3. Driven sprocket; 301. Discharge hole; 302. Discharge port; 303. Atomizing screen; 304. Tension spring; 305. Sliding rod; 306. Moving screen; 307. Telescopic sleeve; 308. Limiting slide plate; 309. Telescopic rod; 3010. Alarm switch; 3011. Fitting baffle; 3012. Top plate; 4. Knob; 5. Arc strip hole; 6. Positioning hole; 7. Motor mounting seat; 8. Seed discharge port; 9. Outer cover; 10. Pressure plate; 11. Positioning head; 12. Adjusting fork; 13. Dust discharge port; 14. First bearing; 15. ABS wear-resistant ring; 16. Low clamp inner slip ring; 17. Second bearing; 18. Guard plate; 19. Seed guide plate; 20. Seed clamping assembly; 21. Adjusting ring; 22, finger clamp slip ring; 23, low clamp outer slip ring; 25, accommodating groove; 26, first bearing seat; 27, second bearing seat; 28, third bearing seat; 29, through hole; 30, second clamping groove; 31, seed guide chamber; 32, bearing stop; 33, hollow tube; 34, low clamping piece; 35, low clamp seed filling fork; 36, low clamp seed discharge fork; 37, finger clamping fork; 38, connecting rod; 39, finger clamping piece; 40, torsion spring; 41, first clamping groove; 42, first seed filling clamping area; 43, first seed discharge area; 44, vibration area; 45, second seed discharge area; 46, second seed filling clamping area; 47, clamping seed discharge area; 48, seed filling area; 49, spiral boss; 50, fork clamping groove; 51, motor; 52, driving gear; 53, inner gear ring. DETAILED DESCRIPTION

[0053] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0054] Embodiment 1

[0055] like Figure 1-18 As shown, this embodiment provides a finger-clamp type seed metering device, including a shell 1, an outer cover 9, a transmission shaft 2, a driving mechanism, a pressure plate 10, a seed guide plate 19, a slip ring mechanism and a plurality of clamp seed metering assemblies 20.

[0056] The shell 1 is provided with a seed discharging port 8 and a dust discharging port 13, and one side of the shell 1 is open; the outer cover 9 is used to buckle on the open side of the shell 1, and the outer cover 9 is provided with a seed inlet tube. The transmission shaft 2 passes through the hole in the center of the shell 1 and rotates with the shell 1; one end of the transmission shaft 2 extends into the cavity formed between the shell 1 and the outer cover 9, and the second bearing seat 27 and the third bearing seat 28 are provided on the hole in the center of the shell 1. The transmission shaft 2 rotates with the second bearing seat 27 and the third bearing seat 28 respectively through two first bearings 14.

[0057] The transmission shaft 2 is connected to the ground wheel on the seeder through a chain transmission mechanism; the chain transmission mechanism includes a chain, a driving sprocket fixed on the ground wheel shaft and a driven sprocket 3 fixedly sleeved on the transmission shaft 2, and the chain is wound around the driving sprocket and the driven sprocket 3.

[0058] 18 seed-discharging clamping assemblies 20 are arranged along the circumference of the transmission shaft 2, and each seed-discharging clamping assembly 20 includes a low clamp, a finger clamp and a torsion spring 40; the low clamp includes a hollow tube 33, the axial direction of the hollow tube 33 is the same as the radial direction of the transmission shaft 2, one end of the hollow tube 33 is fixedly provided with a low clamping piece 34, and the other end is fixedly provided with a low clamp seed-discharging fork 36 and a low clamp seed-filling fork 35; the finger clamp includes a connecting rod 38, the connecting rod 38 passes through the hollow tube 33, one end of the connecting rod 38 is fixedly provided with a finger clamping piece 39, and the other end is fixedly provided with a finger clamping fork 37, the torsion spring 40 is sleeved on the connecting rod 38, and one end of the torsion spring 40 abuts against the finger clamping fork 37, and the other end abuts against the low clamp seed-discharging fork 36;

[0059] The pressure plate 10 is located between the shell 1 and the outer cover 9. The pressure plate 10 is fixedly connected to one end of the transmission shaft 2. The pressure plate 10 is provided with a first card slot 41 corresponding to each hollow tube 33, and the hollow tube 33 passes through the corresponding first card slot 41; the seed guide disc 19 is provided with a second card slot 30 corresponding to each hollow tube 33, and the hollow tube 33 passes through the corresponding second card slot 30, and the seed guide disc 19 is fixedly connected to the pressure plate 10; the seed guide disc 19 is circumferentially provided with a seed guide chamber 31 corresponding to the seed clamping assembly 20 on one side away from the pressure plate 10, and the seed guide chamber 31 is provided with an opening that can communicate with the seed discharge port 8; a through hole 29 is provided on the seed guide disc 19 corresponding to each seed guide chamber 31, and the seeds clamped by the finger clamp 39 and the low clamp 34 can enter the seed guide chamber 31 through the through hole 29; the seed guide disc 19 is rotatably mounted on the first bearing seat 26 on the inner side of the shell 1 through the second bearing 17. It should be noted that the seed guide disc 19 in this embodiment is also cooperated with the guard plate 18. The annular guard plate 18 is used to cooperate with the seed guide disc 19 to form each seed guide chamber 31. In actual production, the seed guide disc 19 and the guard plate 18 can also be produced as one product, or the two can be integrally formed, or a seed guide chamber 31 with only a through hole 29 and an opening communicating with the seed discharge port 8 can be directly opened on the seed guide disc 19.

[0060] In this embodiment, a bearing stopper 32 is further provided on the seed guide disc 19 , and the function of the bearing stopper 32 is to limit the second bearing 17 .

[0061] Embodiment 2

[0062] like Figure 1-18 As shown, the driving mechanism is used to drive the seed guide disc 19 to rotate; in this embodiment, the driving mechanism specifically includes a motor 51, a driving gear 52 fixedly arranged on the output shaft of the motor 51, and an inner gear ring 53 fixedly arranged on the seed guide disc 19. The motor 51 is fixedly mounted on the motor mounting seat 7 on the housing 1, and the driving gear 52 is meshed with the inner gear ring 53. When the motor 51 is working, the seed guide disc 19 is driven to rotate through the driving gear 52 and the inner gear ring 53, and the seed guide disc 19 drives the pressure plate 10 and the transmission shaft 2 to rotate. That is, the transmission shaft 2 in the finger-clamp type seed metering device in this embodiment can be driven to rotate by the ground wheel in the seed drill, and can also be driven to rotate by the motor 51.

[0063] The slip ring mechanism is used to adjust the angle between the finger clamp piece 39 and the low clamp piece 34 by moving the low clamp seed discharge fork 36, the low clamp seed filling fork 35 and the finger clamp fork 37. The finger clamp piece 39 cooperates with the low clamp to clamp and discharge seeds.

[0064] Specifically, the slip ring mechanism includes a low clamp inner slip ring 16, a low clamp outer slip ring 23 and a finger clamp slip ring 22;

[0065] The low clamp inner slip ring 16 is fixedly installed on the inner side of the shell 1. The side of the low clamp inner slip ring 16 away from the shell 1 is divided into a first seed filling clamping area 42 and a first seed discharge area 43 along the circumferential direction. The first seed discharge area 43 is more protruding than the first seed filling clamping area 42. The first seed discharge area 43 is used for sliding cooperation with the low clamp seed discharge fork 36. When the low clamp seed discharge fork 36 slides with the first seed discharge area 43, the angle between the low clamp piece 34 and the finger clamp piece 39 increases; a vibration area 44 is provided in the middle of the first seed discharge area 43. The surface of the vibration area 44 is uneven, so that the vibration area 44 with an uneven surface can make the low clamp seed discharge fork 36 vibrate, thereby improving the seed discharge effect.

[0066] The seed-discharging clamping assembly 20 is located between the low clamp inner slip ring 16 and the low clamp outer slip ring 23. The low clamp outer slip ring 23 is provided with a second seed-filling clamping area 46 and a second seed-discharging area 45 on the side facing the seed-discharging clamping assembly 20. The second seed-filling clamping area 46 is more protruding than the second seed-discharging area 45. The second seed-filling clamping area 46 is used for slidingly cooperating with the low clamp seed-filling fork 35. When the low clamp seed-filling fork 35 slides with the second seed-filling clamping area 46, the angle between the low clamp sheet 34 and the finger clamp sheet 39 is reduced.

[0067] The finger clamp slip ring 22 is coaxially fixedly connected with the low clamp outer slip ring 23. The finger clamp slip ring 22 is provided with a seed filling area 48 and a clamping seed discharge area 47 on the side of the finger clamp slip ring 22 facing the clamping seed discharge assembly 20. The seed filling area 48 is more protruding than the clamping seed discharge area 47. The seed filling area 48 is used for sliding cooperation with the finger clamp fork 37. When the finger clamp fork 37 slides with the seed filling area 48, the angle between the low clamp piece 34 and the finger clamp piece 39 is reduced.

[0068] The finger-clamp type seed metering device of this embodiment further comprises a finger-clamp opening adjustment mechanism, which can drive the finger-clamp sliding ring 22 to move along the axial direction of the transmission shaft 2 .

[0069] Embodiment 3

[0070] like Figure 1-18 As shown, the finger clamp opening adjustment mechanism includes a knob 4, an adjustment fork 12 and an adjustment ring 21. The adjustment ring 21 is coaxially arranged with the finger clamp slip ring 22. The outer periphery of the adjustment ring 21 is threadedly matched with the inner periphery of the finger clamp slip ring 22. Specifically, a spiral boss 49 is arranged on the outer periphery of the adjustment ring 21, and a threaded groove threadedly connected to the spiral boss 49 is arranged on the inner periphery of the finger clamp slip ring 22; one end of the adjustment fork 12 is fixedly connected to the adjustment ring 21, and a fork slot 50 is arranged on the adjustment ring 21, and one end of the adjustment fork 12 is clipped or fixedly connected to the fork slot 50; an arc-shaped strip hole 5 is arranged on the housing 1 corresponding to the knob 4, and the knob 4 is slidably matched with the arc-shaped bar hole 5, and the housing 1 is also provided with a plurality of positioning holes 6 corresponding to the knob 4. The knob 4 is connected to the other end of the adjusting fork 12 through a spring. A positioning head 11 is fixed on the knob 4, and the positioning head 11 can be inserted into any positioning hole 6. The spring gives a pulling force to the knob 4, so that the positioning head 11 can be stably located in a positioning hole 6. When adjustment is required, the knob 4 is pulled up to make the positioning head 11 disengage from the positioning hole 6, and the angle of the adjusting fork 12 is rotated by the knob 4, and then the positioning head 11 is inserted into another positioning hole 6 to complete the adjustment of the finger clamp opening size. The adjusting fork 12 is a Z-shaped rod. On the inner side of the housing 1, a fan-shaped receiving groove 25 is provided corresponding to the adjusting fork 12, and the adjusting fork 12 can swing in the receiving groove 25; the center angle of the receiving groove 25 is equal to the center angle of the arc-shaped bar hole 5.

[0071] In this embodiment, the transmission shaft 2, the housing 1, the seed guide disc 19, the pressure disc 10, the low clamp inner slip ring 16, the low clamp outer slip ring 23 and the finger clamp slip ring 22 are coaxial. The first seed discharge area 43 and the first seed filling clamping area 42, the second seed discharge area 45 and the second seed filling clamping area 46, and the seed filling area 48 and the clamping seed discharge area 47 are all smoothly connected.

[0072] Embodiment 4

[0073] like Figure 1-18As shown, a lubrication alarm mechanism is provided on the driven sprocket 3, which is used to lubricate the outer wall of the driven sprocket 3 when the driven sprocket 3 rotates. The lubrication alarm mechanism includes a plurality of discharge holes 301 opened on the inner wall of the driven sprocket 3. A discharge port 302 is opened on the inner wall of the driven sprocket 3 on one side of the discharge hole 301, and the discharge port 302 is connected to the discharge hole 301 in a corresponding manner. An atomizing mesh plate 303 is fixedly connected to the inside of the discharge port 302. Tension springs 304 are fixedly connected to the inner wall of the driven sprocket 3 on both sides of the discharge hole 301. A sliding rod 305 is fixedly connected between the two tension springs 304. The sliding rod 305 is fixedly connected to the inner wall of the driven sprocket 3. The outer wall of the rod 305 is slidably connected with a movable mesh plate 306, the bottom end of the sliding rod 305 is fixedly connected with a fitting baffle 3011, the bottom of the inner wall of the driven sprocket 3 is fixedly connected with a telescopic sleeve 307, the inner part of the telescopic sleeve 307 is slidably connected with a limiting slide 308, one side of the limiting slide 308 is fixedly connected with a telescopic rod 309, and the end of the telescopic rod 309 away from the limiting slide 308 slides and extends to the outside of the telescopic sleeve 307, the bottom of the inner wall of the telescopic sleeve 307 is provided with an alarm switch 3010, and the end of the sliding rod 305 away from the fitting baffle 3011 is fixedly connected with a top plate 3012;

[0074] In this embodiment, the outer wall of the fitting baffle 3011 and the inner wall of the agent outlet hole 301 are slidingly fitted, the outer wall diameter of the sliding rod 305 is smaller than the inner wall aperture of the agent outlet hole 301, the inner wall aperture of the agent outlet hole 301 is smaller than the inner wall aperture of the agent outlet 302, and a plurality of mesh holes are provided on the movable mesh plate 306 and the atomizing mesh plate 303. The outer wall of the limiting slide plate 308 and the inner wall of the telescopic sleeve 307 are slidingly fitted, the limiting slide plate 308 and the alarm switch 3010 are correspondingly extruded, and the end of the telescopic rod 309 away from the limiting slide plate 308 is connected to the movable mesh plate 306.

[0075] The specific working principle of the finger-clip type seed metering device of this embodiment is as follows:

[0076] See also Fig.15 , the seed enters the cavity between the shell and the housing 1 through the seed inlet tube, the motor 51 is turned on, the motor 51 drives the transmission shaft 2 to rotate through the transmission mechanism, the transmission shaft 2 drives the pressure plate 10 to rotate, the pressure plate 10 drives the seed guide plate 19 and the 18 seed-discharging clamping assemblies 20 to rotate together, and the seed-discharging clamping assembly 20 rotates with the transmission shaft 2 as the central axis. The low-clamp seed-discharging fork 36 will slide with the surface of the first seed-discharging area 43 on the low-clamp inner slip ring 16, the low-clamp seed-filling fork 35 will slide with the surface of the second seed-filling clamping area 46 on the low-clamp outer slip ring 23, and the finger-clamp fork 37 will slide with the surface of the seed-filling area 48 on the finger-clamp slip ring 22, for example:

[0077] In the seed filling state, the low clamp seed discharging fork 36 corresponds to the first seed filling clamping area 42 on the low clamp inner slip ring 16, but the low clamp seed discharging fork 36 does not contact the surface of the first seed filling clamping area 42, the low clamp seed discharging fork 35 will slide with the second seed filling clamping area 46 on the low clamp outer slip ring 23, and the finger clamp fork 37 will slide with the seed filling area 48 on the finger clamp slip ring 22, so that the angle between the finger clamp piece 39 and the low clamp piece 34 increases, so that the seed filling is smooth and the seed filling is smooth. The seed enters between the finger clamp piece 39 and the low clamp piece 34. As the transmission shaft 2 rotates, the finger clamp fork 37 gradually slides to the clamping seeding area 47 on the finger clamp slip ring 22, but the finger clamp fork 37 does not come into contact with the surface of the clamping seeding area 47. At this time, the angle between the finger clamp piece 39 and the low clamp piece 34 is reduced, so that the finger clamp piece 39 and the low clamp piece 34 clamp the seed, that is, enter the clamping state. In the clamping state, the low clamp seeding fork 35 will slide with the second seed filling clamping area 46 on the low clamp outer slip ring 23; with the rotation of the transmission shaft 2, the low clamp seed discharge fork 36 will gradually slide with the first seed discharge area 43 on the low clamp inner slip ring 16, and the low clamp seed discharge fork 35 will gradually slide to the second seed discharge area 45 on the low clamp outer slip ring 23, but the low clamp seed discharge fork 35 does not contact the second seed discharge area 45, and the finger clamp fork 37 will always be in the clamping seed discharge area 47 on the finger clamp slip ring 22, but the finger clamp fork 37 will not contact the surface of the clamping seed discharge area 47, thereby driving the hollow tube 33 to rotate, so that the angle between the finger clamp piece 39 and the low clamp piece 34 is increased, so that the seeds between the finger clamp piece 39 and the low clamp piece 34 are released, that is, the seed discharge state is entered, and the seeds are released and fall into the seed guide chamber 31, and finally discharged through the opening of the seed guide chamber 31 and the seed discharge port 8 on the shell 1 to achieve sowing;

[0078] As the transmission shaft 2 rotates, the finger clamp fork 37 will gradually slide and cooperate with the seed filling area 48 on the finger clamp slip ring 22, and then repeat the above process, and the cycle will continue to achieve orderly and accurate sowing.

[0079] When adjustment is required to adapt to another size of seed particles, the adjusting ring 21 is driven to rotate through the adjusting fork 12 by adjusting the sliding knob 4 along the arc. When the adjusting ring 21 rotates, it will drive the finger clamp slip ring 22 to move axially along the transmission shaft 2, and the low clamp outer slip ring 23 will move with the finger clamp slip ring 22, thereby adjusting the distance between the finger clamp slip ring 22, the low clamp outer slip ring 23 and the low clamp inner slip ring 16, and then being able to change the degree of limitation of the low clamp seed discharge fork 36, the low clamp seed filling fork 35 and the finger clamp fork 37, thereby changing the range of the angle between the finger clamp piece 39 and the low clamp piece 34, so that the finger clamp piece 39 and the low clamp piece 34 can clamp and discharge seed particles of another size.

[0080] It is worth noting that the circumferential positions of the low clamp inner slip ring 16, the low clamp outer slip ring 23 and the finger clamp slip ring 22 correspond to each other. For example, the seeding areas of the first seeding area 43 on the low clamp inner slip ring 16, the second seeding area 45 on the low clamp outer slip ring 23 and the clamping seeding area 47 on the finger clamp slip ring 22 correspond to each other, and the first seed filling clamping area 42 on the low clamp inner slip ring 16, the second seed filling clamping area 46 on the low clamp outer slip ring 23 and the seed filling area 48 and the clamping area on the clamping seeding area 47 on the finger clamp slip ring 22 correspond to each other, ensuring that the clamping seeding assembly 20 can be opened and closed normally in a complete cycle of seed filling, clamping and seeding to complete the seed filling, clamping and seeding in a cycle.

[0081] In addition, an arc-shaped ABS wear-resistant ring 15 is arranged between the seed guide disk 19 and the outer cover 9. The ABS wear-resistant ring 15 is distributed on the moving path of the finger clamp at the end away from the transmission shaft 2 in the seed filling area 48 and the clamping area. The ABS wear-resistant ring 15 is smooth and will not rust, which can reduce the friction when the finger clamp moves and has a good use effect.

[0082] When the driven sprocket 3 is rotated, the agent outlet hole 301 and the agent outlet port 302 on the outer wall thereof can be rotated. According to the effect of centrifugal force, the fitting baffle 3011 can slide toward the outside of the agent outlet hole 301, and then the agent outlet hole 301 can be opened, so that the lubricating oil inside the driven sprocket 3 can flow out through the agent outlet hole 301 and the agent outlet port 302, and the outer wall of the driven sprocket 3 can be lubricated. By the effect of lubrication by the lubricating oil flowing out, the outer wall of the driven sprocket 3 can be lubricated when the driven sprocket 3 is rotated, and the rotation effect of the driven sprocket 3 is correspondingly improved, and the use efficiency of the finger-clamp type seed metering device is improved;

[0083] When the sliding rod 305 moves toward the outside of the driven sprocket 3, it can drive the top plate 3012 at one end thereof to press the movable mesh plate 306, and then the movable mesh plate 306 moves inside the driven sprocket 3, which can promote the flow of the lubricating oil inside the driven sprocket 3, thereby increasing the flow effect of the lubricating oil, and thus improving the effect of the lubricating oil on the driven sprocket 3.

[0084] As the lubricating oil is used, the lubricating oil level inside the driven sprocket 3 drops, and the movable mesh plate 306 drives the telescopic rod 309 to slide toward the inside of the telescopic sleeve 307, so that the limiting slide plate 308 slides and squeezes the alarm switch 3010, causing the alarm switch 3010 to alarm, thereby allowing the staff to know the usage of the lubricating oil inside the driven sprocket 3, making it convenient for the staff to add the lubricating oil.

[0085] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A finger-clamp type seed metering device, characterized in that: The invention comprises a housing (1), an outer cover (9), a transmission shaft (2) and a driven sprocket (3), and also comprises: A plurality of clamping and seeding assemblies (20) are arranged along the circumference of the transmission shaft (2), each of the clamping and seeding assemblies (20) comprising a low clamp, a finger clamp and a torsion spring, the low clamp comprising a hollow tube (33), the axial direction of the hollow tube (33) being the same as the radial direction of the transmission shaft (2), a low clamping sheet (34) being fixedly arranged at one end of the hollow tube (33), and a low clamping and seeding shifting fork (36) and a low clamping and seeding shifting fork (35) being fixedly arranged at the other end; The finger clamp comprises a connecting rod (38), the connecting rod (38) passes through the hollow tube (33), one end of the connecting rod (38) is fixedly provided with a finger clamp (39), and the other end is fixedly provided with a finger clamp shift fork (37), the torsion spring (40) is sleeved on the connecting rod (38), and one end of the torsion spring (40) is in contact with the finger clamp shift fork (37), and the other end is in contact with the low clamp seeding shift fork (36); A pressure plate (10) is located between the housing (1) and the outer cover (9), the pressure plate (10) is fixedly connected to one end of the transmission shaft (2), the pressure plate (10) is provided with a first slot (41) corresponding to each hollow tube (33), and the hollow tube (33) passes through the corresponding first slot (41); A seed guide disc (19), wherein the seed guide disc (19) is provided with a second clamping groove (30) corresponding to each hollow tube (33), the hollow tube (33) passes through the corresponding second clamping groove (30), and the seed guide disc (19) is fixedly connected to the pressure disc (10); a seed guide chamber (31) corresponding to the seed clamping assembly (20) is circumferentially provided on one side of the seed guide disc (19) away from the pressure disc (10), and the seed guide chamber (31) is provided with an opening that can communicate with the seed discharge port (8); a through hole is provided on the seed guide disc (19) corresponding to each seed guide chamber (31), and the seeds clamped by the finger clamp (39) and the low clamp (34) can enter the seed guide chamber (31) through the through hole; A slip ring mechanism, the slip ring mechanism is used to adjust the angle between the finger clamping piece (39) and the low clamping piece (34) by toggling the low clamping seed discharging fork (36), the low clamping seed discharging fork (35) and the finger clamping fork (37), and the finger clamping piece (39) cooperates with the low clamping piece to clamp seeds and discharge seeds; The transmission shaft (2) is connected to the ground wheel on the seed drill through a chain transmission mechanism; the chain transmission mechanism comprises a chain, a driving sprocket fixed on the ground wheel shaft and a driven sprocket (3) fixedly sleeved on the transmission shaft (2); the chain is wound around the driving sprocket and the driven sprocket (3); the driven sprocket (3) is provided with a lubrication alarm mechanism for lubricating the outer wall of the driven sprocket (3) when the driven sprocket (3) rotates.

2. A finger-clamp type seed metering device according to claim 1, characterized in that: The slip ring mechanism comprises a low-clamp inner slip ring (16), a low-clamp outer slip ring (23) and a finger-clamp slip ring (22); The low clamp inner slip ring (16) is fixedly mounted on the inner side of the housing (1); the side of the low clamp inner slip ring (16) away from the housing (1) is circumferentially divided into a first seed filling clamping area (42) and a first seed discharge area (43); the first seed discharge area (43) is more protruding than the first seed filling clamping area (42); the first seed discharge area (43) is used for slidingly cooperating with the low clamp seed discharge fork (36); when the low clamp seed discharge fork (36) and the first seed discharge area (43) are slidingly cooperating, the angle between the low clamp plate (34) and the finger clamp plate (39) increases; a vibration area (44) is arranged in the middle of the first seed discharge area (43); the surface of the vibration area (44) is uneven, so that the vibration area (44) with an uneven surface can make the low clamp seed discharge fork (36) vibrate, thereby improving the seed discharge effect; The seed-discharging clamping assembly (20) is located between the low clamp inner slip ring (16) and the low clamp outer slip ring (23); the low clamp outer slip ring (23) is provided with a second seed-filling clamping area (46) and a second seed-discharging area (45) on the side facing the seed-discharging clamping assembly (20); the second seed-filling clamping area (46) is more protruding than the second seed-discharging area (45); the second seed-filling clamping area (46) is used for slidingly matching with the low clamp seed-filling fork (35); when the low clamp seed-filling fork (35) and the second seed-filling clamping area (46) are slidingly matched, the angle between the low clamp sheet (34) and the finger clamp sheet (39) is reduced; A finger clamp slip ring (22) is coaxially fixedly connected with a low clamp outer slip ring (23); a seed filling area (48) and a seed holding area (47) are arranged on the side of the finger clamp slip ring (22) facing the seed clamping assembly (20); the seed filling area (48) is more protruding than the seed holding area (47); the seed filling area (48) is used for slidingly cooperating with a finger clamp fork (37); when the finger clamp fork (37) and the seed filling area (48) are slidingly cooperating, the angle between the low clamping piece (34) and the finger clamping piece (39) is reduced.

3. The finger-clamp type seed metering device according to claim 1, characterized in that: The seed metering device also includes a finger clamp opening adjustment mechanism, which can drive the finger clamp sliding ring (22) to move along the axial direction of the transmission shaft (2); The finger clamp opening adjustment mechanism comprises a knob (4), an adjustment fork (12) and an adjustment ring (21); the adjustment ring (21) is coaxially arranged with the finger clamp sliding ring (22); the outer circumference of the adjustment ring (21) is threadedly matched with the inner circumference of the finger clamp sliding ring (22); one end of the adjustment fork (12) is clamped or fixedly connected with the fork clamping groove (50); and the knob (4) is connected with the other end of the adjustment fork (12) via a spring; The housing (1) is provided with an arc-shaped bar hole (5) corresponding to the knob (4), and the knob (4) is slidably matched with the arc-shaped bar hole (5). The housing (1) is also provided with a plurality of positioning holes (6) corresponding to the knob (4). The knob (4) is connected to the other end of the adjustment fork (12) via a spring. A positioning head (11) is fixedly provided on the knob (4), and the positioning head 11 can be inserted into any one of the positioning holes 6.

4. The finger-clamp type seed metering device according to claim 1, characterized in that: The transmission shaft (2), housing (1), seed guide disc (19), pressure disc (10), low clamp inner slip ring (16), low clamp outer slip ring (23) and finger clamp slip ring (22) are all coaxially arranged, and the first seed row area (43) and the first seed filling clamping area (42), the second seed row area (45) and the second seed filling clamping area (46), and the seed filling area (48) and the clamping seed row area (47) are all smoothly connected.

5. The finger-clamp type seed metering device according to claim 1, characterized in that: The seed metering device also includes a driving mechanism for driving the seed guide disc (19) to rotate. The driving mechanism is used to drive the seed guide disc (19) to rotate. The driving mechanism specifically includes a motor (51), a driving gear (52) fixedly arranged on the output shaft of the motor (51), and an inner gear ring (53) fixedly arranged on the seed guide disc (19). The motor (51) is fixedly mounted on a motor mounting seat (7) on the housing (1), and the driving gear (52) is meshed with the inner gear ring (53).

6. The finger-clamp type seed metering device according to claim 2, characterized in that: The first seeding area (43) and the first seed filling clamping area (42), the second seeding area (43) and the second seed filling clamping area (46), and the seed filling area (48) and the clamping seeding area (47) are all smoothly connected. The shell (1) is provided with a seeding port (8). One side of the shell (1) is open. The outer cover (9) is used to snap on the open side of the shell (1). The outer cover (9) is provided with a seed inlet tube. The transmission shaft (2) is rotatably matched with the shell (1); the transmission shaft (2) is connected to the ground wheel on the seeder through a chain transmission mechanism.

7. The finger-clamp type seed metering device according to claim 1, characterized in that: The lubrication alarm mechanism comprises a plurality of discharge holes (301) formed on the inner wall of the driven sprocket (3); a discharge port (302) is formed on the inner wall of the driven sprocket (3) on one side of the discharge hole (301); the discharge port (302) and the discharge hole (301) are connected to each other in a corresponding manner; an atomizing mesh plate (303) is fixedly connected to the inside of the discharge port (302); a tension spring (304) is fixedly connected to the inner wall of the driven sprocket (3) on both sides of the discharge hole (301); a sliding rod (305) is fixedly connected between the two tension springs (304); a movable mesh plate (306) is slidably connected to the outer wall of the sliding rod (305); The bottom end of the sliding rod (305) is fixedly connected to a fitting baffle (3011), the bottom of the inner wall of the driven sprocket (3) is fixedly connected to a telescopic sleeve (307), the interior of the telescopic sleeve (307) is slidably connected to a limiting slide (308), one side of the limiting slide (308) is fixedly connected to a telescopic rod (309), and the end of the telescopic rod (309) away from the limiting slide (308) slides and extends to the outside of the telescopic sleeve (307), an alarm switch (3010) is provided at the bottom of the inner wall of the telescopic sleeve (307), and the end of the sliding rod (305) away from the fitting baffle (3011) is fixedly connected to a top plate (3012).

8. The finger-clamp type seed metering device according to claim 7, characterized in that: The outer wall of the fitting baffle (3011) and the inner wall of the agent outlet hole (301) are arranged to be slidingly fitted, and the outer wall diameter of the sliding rod (305) is smaller than the inner wall diameter of the agent outlet hole (301).

9. The finger-clamp type seed metering device according to claim 7, characterized in that: The inner wall diameter of the agent outlet hole (301) is smaller than the inner wall diameter of the agent outlet port (302), and a plurality of mesh holes are provided on both the movable mesh plate (306) and the atomizing mesh plate (303).

10. The finger-clamp type seed metering device according to claim 7, characterized in that: The outer wall of the limiting slide (308) and the inner wall of the telescopic sleeve (307) are slidably fitted, the limiting slide (308) and the alarm switch (3010) are correspondingly extruded, and one end of the telescopic rod (309) away from the limiting slide (308) is connected to the movable mesh plate (306).

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