Air-type seed metering and cleaning device

Abstract

The utility model discloses a kind of pneumatic seed metering device precision regulating seed cleaning device, it is installed on the front shell of pneumatic seed metering device, including seed cleaning regulating frame, seed cleaning piece and adjusting mechanism;Adjusting mechanism includes fixed base, adjusting knob and executing piece;Adjusting knob is connected between fixed base by connecting piece;Adjusting knob is fixed with connecting piece;Executing piece and connecting piece can relatively axial sliding, and cannot relatively rotate;Connecting piece has limit tooth, fixed base has the limit slot for limit tooth to be embedded, the number of limit slot is more than the number of limit tooth;Adjusting knob and connecting piece can be synchronously axially slid relative to fixed base, to make limit tooth and limit slot relatively disengage or engage;Adjusting mechanism further includes spring acting on connecting piece.In the present application, by redesigning the structure of seed cleaning regulating device, the adjusting knob can be fixed at different positions by the butt joint of limit tooth and different limit slot, and the current state of the adjusting knob is maintained by the spring, and the adjusting operation can be quickly completed by pressing and rotating the adjusting knob when needed. The above measures greatly improve the operation convenience, adjustment accuracy and anti-misoperation property of the adjusting.

Description

Technical Field

[0001] This utility model relates to the field of agricultural seeding machinery technology, and in particular to a pneumatic seed metering device for precision adjustment and seed cleaning. Background Technology

[0002] The seed metering device is a key component of seeding machinery. Its main function is to dispense seeds quantitatively and evenly according to a set sowing rate to ensure sowing accuracy and quality. In pneumatic seed metering devices, seeds are adsorbed through suction holes on the seed metering disc, and precise seed delivery is achieved under the action of air pressure difference. However, during the seed metering process, multiple seeds often adhere to the suction holes simultaneously, causing double-seeding or missed sowing. Therefore, a seed cleaning device is needed to remove excess seeds to achieve precision sowing.

[0003] The applicant's earlier application, CN 117223443 A, discloses a seed metering device's seed cleaning and adjustment structure, which adjusts the distance between the seed cleaning component and the seed suction hole's movement path to adapt to the seed metering needs of different crops. However, this structure still suffers from problems in practical application, such as inconvenient operation, reliance on experience for adjustment, and poor intuitiveness. This leads to a cumbersome adjustment process when changing crop types, easily resulting in misadjustment or incomplete adjustment, affecting sowing accuracy and operational efficiency. Furthermore, the device lacks an effective positioning and locking mechanism after adjustment, making it prone to positional shifts due to vibration and other factors, thus affecting the seed cleaning effect. Therefore, it is necessary to improve the structure of the seed cleaning and adjustment device to enhance its operational convenience, adjustment accuracy, and stability. Summary of the Invention

[0004] Purpose of the invention: In order to overcome the shortcomings of the existing technology, this utility model provides a pneumatic seed metering device that is easy to operate and accurately adjustable.

[0005] Technical solution: To achieve the above objectives, the present invention provides a pneumatic seed metering device for precision adjustment and seed cleaning, which is installed on the front shell of the pneumatic seed metering device. It includes a seed cleaning adjustment frame and a seed cleaning component installed on the seed cleaning adjustment frame, and also includes an adjustment mechanism that can change the position of the seed cleaning adjustment frame. The adjustment mechanism includes a fixed base fixed relative to the front shell, an adjustment knob, and an actuator capable of acting on the seed cleaning adjustment frame; The adjustment knob is connected to the fixed base via a connector; the adjustment knob and the connector are fixed relative to each other; the actuator and the connector can slide relative to each other axially but cannot rotate relative to each other, and the actuator cannot slide axially relative to the fixed base. The connector has limiting teeth, and the fixing seat has limiting grooves for the limiting teeth to be inserted into, the number of limiting grooves being greater than the number of limiting teeth; the adjusting knob and the connector can slide synchronously relative to the fixing seat axially, so that the limiting teeth are disengaged or engaged with the limiting grooves; the adjusting mechanism also includes a spring acting on the connector, the force applied by the spring to the connector keeping the limiting teeth within the currently located limiting groove.

[0006] Furthermore, the fixing seat has a cavity, the top of the cavity has an opening, and the limiting groove is disposed around the opening; the spring is placed inside the cavity, and at least a portion of the connector is constrained in the cavity.

[0007] With the above structure, when it is necessary to adjust the position of the seed cleaning component, simply press the adjustment knob to disengage the limiting tooth from the current limiting groove, then rotate the adjustment knob while it is pressed to align the limiting tooth with the target limiting groove, and finally release the adjustment knob. The spring will then engage and fix the limiting tooth with the target limiting groove. When the adjustment knob is rotated, the adjustment knob drives the actuator to rotate through the connecting part, thereby adjusting the position of the seed cleaning adjustment frame and thus achieving the purpose of adjusting the position of the seed cleaning component.

[0008] Furthermore, the adjustment mechanism also includes a nameplate with marking lines and a record of the crop type corresponding to each marking line; the adjustment knob has a pointer.

[0009] According to the above-described pneumatic seed metering precision adjustment and seed cleaning device, the actuator is a gear. One end of the seed cleaning adjustment frame is rotatably mounted relative to the front housing, and the other end has a partial internal gear that meshes with the partial internal gear. With this structure, the actuator rotates, and the position of the seed cleaning adjustment frame can be changed through the meshing of the gears.

[0010] Furthermore, the number of seed cleaning components installed on the seed cleaning adjustment frame is multiple. Since one end of the seed cleaning adjustment frame is rotatably mounted relative to the front shell, the angle of the seed cleaning adjustment frame changes, so that the distance of each seed cleaning component relative to the movement path of the seeds in the seed metering device is different, which can perform gradual seed cleaning, ensure the success rate of seed cleaning, and prevent all the seeds adsorbed by the seed suction holes of the seed metering plate from being removed.

[0011] Beneficial effects: The pneumatic seed metering device with precision adjustment and seed cleaning of this invention has the following beneficial effects: (1) In this invention, by redesigning the structure of the seed cleaning adjustment device, the adjustment knob can be fixed in different positions by connecting the limiting teeth with different limiting grooves, and the adjustment knob is kept in its current state by a spring. When adjustment is needed, the adjustment operation can be quickly completed by pressing and rotating the adjustment knob. The above measures greatly improve the ease of operation, accuracy of adjustment and prevention of accidental touch.

[0012] (2) During the user adjustment process, by aligning the pointer on the adjustment knob with the mark line corresponding to the crop type of the seed being sown, the position of the actuator can be quickly adjusted, which can lower the threshold of use and enable the user to intuitively and quickly adjust the position of the seed cleaning device according to the type of seed. Attached Figure Description

[0013] Figure 1 This is a structural diagram of a pneumatic seed metering device; Figure 2 A structural diagram of the combined front shell and precision seed cleaning device; Figure 3 A three-dimensional structural diagram of the front shell and the precision seed cleaning device; Figure 4 This is a structural diagram of the combined structure of the actuator, the seed cleaning adjustment frame, and the seed cleaning component; Figure 5 This is a partial structural diagram of the precision seed cleaning device; Figure 6 A partial three-dimensional structural diagram of the precision seed cleaning device; Figure 7 This is a cross-sectional view of the precision seed cleaning device; Figure 8 This is a structural diagram of the combination of the seed cleaning component and the seed metering wheel.

[0014] In the diagram: 1-Seed cleaning adjustment frame; 1a-Partial internal gear; 2-Seed cleaning component; 3-Adjustment knob; 3a-Pointer part; 4-Actuator part; 5-Fixed base; 5a-Cavity part; 5b-Limiting groove; 6-Connecting part; 6a-Limiting tooth; 7-Spring; 8-Nameplate; A-Front shell; A1-Seed outlet; B-Seed box; C-Seed feeding wheel; C1-Seed suction hole; D-Air inlet component. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings.

[0016] The precision adjustment and seed cleaning device of the present invention is applied to, for example Figure 1 The pneumatic seed metering device shown includes a housing and a seed metering wheel C housed within the housing. The seed metering wheel C has seed suction holes C1 arranged in a circumferential array (e.g., ...). Figure 8 As shown), the outer shell includes a front shell A and a rear shell, as... Figure 2As shown, the precision adjusting seed cleaning device is installed on the front shell A of the pneumatic seed metering device. The front shell A also has a seed box B and a seed outlet A1. An air extraction port is provided on the rear shell, and an air inlet D with an air inlet is installed on the front shell. By drawing air through the air extraction port on the rear shell, the seed suction hole C1 can generate suction, sucking seeds from the seed box B and transporting them to the seed outlet A1 for discharge. During the process of the seed suction hole C1 carrying the seeds from the seed box B to the seed outlet A1, it passes through the precision adjusting seed cleaning device. The precision adjusting seed cleaning device cleans the seed suction hole C1, removing any extra seeds sucked in, ensuring that it carries only one seed.

[0017] like Figure 2 As shown, the precision adjustment and seed cleaning device includes a seed cleaning adjustment frame 1 installed on the inner side of the front shell A and a seed cleaning component 2 installed on the seed cleaning adjustment frame 1, and also includes an adjustment mechanism that can change the position of the seed cleaning adjustment frame 1; the adjustment mechanism includes a fixed base 5 fixed relative to the front shell A, an adjustment knob 3 and an actuator 4 that can act on the seed cleaning adjustment frame 1. like Figure 6 and Figure 7 As shown, the adjusting knob 3 is connected to the fixed base 5 via a connector 6; the adjusting knob 3 and the connector 6 are fixed relative to each other; the actuator 4 and the connector 6 can slide relative to each other axially but cannot rotate relative to each other, and the actuator 4 cannot slide relative to the fixed base 5 axially. like Figure 6 As shown, the connector 6 has a limiting tooth 6a, and the fixing seat 5 has a limiting groove 5b for the limiting tooth 6a to be inserted into. The number of limiting grooves 5b is greater than the number of limiting teeth 6a. The adjusting knob 3 and the connector 6 can slide synchronously relative to the fixing seat 5 axially, so that the limiting tooth 6a is disengaged or engaged with the limiting groove 5b. The adjusting mechanism also includes a spring 7 acting on the connector 6. The force applied by the spring 7 to the connector 6 keeps the limiting tooth 6a in the currently located limiting groove 5b.

[0018] Preferably, the fixing seat 5 has a cavity 5a, the top of the cavity 5a has an opening, and the limiting groove 5b is disposed around the opening; the spring 7 is placed in the cavity 5a, and at least a portion of the connecting member 6 is restricted in the cavity 5a.

[0019] With the above structure, when it is necessary to adjust the position of the seed cleaning component 2, simply press the adjustment knob 3 first to disengage the limiting tooth 6a from the current limiting groove 5b, then rotate the adjustment knob 3 while it is pressed to align the limiting tooth 6a with the target limiting groove 5b, and finally release the adjustment knob 3. The spring 7 will then engage and fix the limiting tooth 6a with the target limiting groove 5b. When the adjustment knob 3 is rotated, the adjustment knob 3 drives the actuator 4 to rotate through the connecting piece 6, thereby adjusting the position of the seed cleaning adjustment frame 1 and thus achieving the purpose of adjusting the position of the seed cleaning component 2.

[0020] In this invention, by redesigning the structure of the seed cleaning adjustment device, the adjusting knob 3 can be fixed in different positions by interfacing the limiting teeth 6a with different limiting grooves 5b. Furthermore, the spring 7 maintains the current state of the adjusting knob 3, and the adjustment operation can be quickly completed by pressing and rotating the adjusting knob 3 when needed. These measures greatly improve the ease of operation, accuracy, and prevention of accidental activation.

[0021] like Figure 5 and Figure 6 As shown, the adjustment mechanism also includes a nameplate 8, which has marking lines and records the crop type corresponding to each marking line; the adjustment knob 3 has a pointer part 3a. In this embodiment, the nameplate 8 has three marking lines, corresponding to the crop types "soybean", "corn" and "peanut" respectively.

[0022] During the user's adjustment process, by aligning the pointer 3a on the adjustment knob 3 with the mark line corresponding to the crop type of the sown seeds, the position of the actuator 4 can be quickly adjusted. This reduces the barrier to entry and allows users to intuitively and quickly adjust the position of the seed cleaning component 2 according to the seed type.

[0023] Preferably, such as Figure 4 As shown, the actuator 4 is a gear. One end of the seed cleaning adjustment frame 1 is rotatably mounted relative to the front housing A, and the other end has a partial internal gear 1a, which meshes with the gear. With this structure, the actuator 4 rotates, and the position of the seed cleaning adjustment frame 1 can be changed through the meshing of the gears.

[0024] Preferably, the number of seed cleaning components 2 installed on the seed cleaning adjustment frame 1 is multiple. Since one end of the seed cleaning adjustment frame 1 is rotatably mounted relative to the front housing A, changes in the angle of the seed cleaning adjustment frame 1 can cause different distances along the movement paths of each seed cleaning component 2 relative to the seed suction hole C1 in the seed dispensing wheel C (e.g., ...). Figure 8 As shown, it can perform gradual seed cleaning, ensuring the success rate of seed cleaning and preventing all seeds adsorbed by the seed suction holes of the seed metering tray from being removed.

[0025] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A precision adjustment and cleaning device for a pneumatic seed metering device, which is installed on the front shell (A) of the pneumatic seed metering device, includes a cleaning adjustment frame (1) and a cleaning component (2) installed on the cleaning adjustment frame (1), and further includes an adjustment mechanism capable of changing the position of the cleaning adjustment frame (1); The adjustment mechanism includes a fixed base (5) fixed relative to the front shell (A), an adjustment knob (3), and an actuator (4) capable of acting on the seed cleaning adjustment frame (1); characterized in that: The adjustment knob (3) is connected to the fixed base (5) by a connector (6); the adjustment knob (3) and the connector (6) are fixed relative to each other; the actuator (4) and the connector (6) can slide relative to each other axially, but cannot rotate relative to each other; The connector (6) has a limiting tooth (6a), and the fixing seat (5) has a limiting groove (5b) for the limiting tooth (6a) to be inserted into. The number of limiting grooves (5b) is greater than the number of limiting teeth (6a). The adjusting knob (3) and the connector (6) can slide synchronously relative to the fixing seat (5) axially so that the limiting tooth (6a) and the limiting groove (5b) are disengaged or engaged. The adjusting mechanism also includes a spring (7) acting on the connector (6).

2. The pneumatic seed metering device for precision adjustment and seed cleaning according to claim 1, characterized in that, The fixed base (5) has a cavity (5a) with an opening at the top and a limiting groove (5b) around the opening; the spring (7) is placed inside the cavity (5a) and at least a portion of the connector (6) is restricted in the cavity (5a).

3. The pneumatic seed metering device for precision adjustment and seed cleaning according to claim 1, characterized in that, The adjustment mechanism also includes a nameplate (8) with marking lines and recording the crop type corresponding to each marking line; the adjustment knob (3) has a pointer (3a).

4. The pneumatic seed metering device for precision adjustment and seed cleaning according to claim 1, characterized in that, The actuator (4) is a gear. One end of the seed cleaning adjustment frame (1) is rotatably mounted relative to the front shell (A), and the other end has a local internal gear (1a), which meshes with the local internal gear (1a).

5. The pneumatic seed metering device for precision adjustment and seed cleaning according to claim 1, characterized in that, The number of seed cleaning components (2) installed on the seed cleaning adjustment frame (1) is multiple.

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