A portable hand-held seeder

Abstract

The application discloses a portable handheld seeder, which comprises a main seeding mechanism, a side seeding mechanism arranged on the side of the main seeding mechanism, and a spacing control mechanism for connecting the main seeding mechanism and the side seeding mechanism. The spacing control mechanism comprises a sliding mechanism arranged on the main seeding mechanism, a locking mechanism arranged on the sliding mechanism and used for controlling the sliding or locking of the sliding mechanism, and a linkage mechanism connected with the locking mechanism and the side seeding mechanism. The portable handheld seeder can be adjusted in lateral spacing through the spacing control mechanism, and the main seeding mechanism and the side seeding mechanism are detachably connected, so that the seeder can meet the demand of small-area planting. The spacing of seeds in the longitudinal direction can be adjusted through a distribution module, and the influence of different lateral and longitudinal spacings on the growth efficiency of crops can be studied.

Description

Technical Field

[0001] This invention relates to the field of seeder technology, and more specifically to a portable handheld seeder. Background Technology

[0002] Automated seeders are mainly used for sowing crop seeds and are now widely used in large-scale agricultural sowing. However, these seeders are expensive, occupy a large space, and their parameter control is not strict during sowing. They are not suitable for small areas or sowing methods that require strict parameter control, such as experimental sites for seed research in scientific research institutes. These experimental sites are generally small in area and have strict requirements for the longitudinal and transverse spacing parameters of sowing. Currently, there is no seeder that can be adjusted according to the sowing area and sowing parameters. Summary of the Invention

[0003] The purpose of this invention is to provide a portable handheld seeder.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a portable handheld seeder, comprising a main seeding mechanism, a side seeding mechanism disposed on the side of the main seeding mechanism, and a spacing control mechanism for connecting the main seeding mechanism and the side seeding mechanism, wherein the spacing control mechanism comprises:

[0005] A sliding mechanism is mounted on the main seeding mechanism;

[0006] A locking mechanism, wherein the locking mechanism is disposed on the sliding mechanism, and the sliding mechanism is controlled to slide or lock; and

[0007] A linkage mechanism, which connects the locking mechanism and the side-seeding mechanism;

[0008] The distance between the seeding mechanism on the control side of the linkage mechanism and the main seeding mechanism is adjusted by moving the sliding mechanism.

[0009] Furthermore, the side seeding mechanism and the main seeding mechanism are detachably connected through a linkage mechanism.

[0010] Furthermore, the sliding mechanism includes a guide rail groove disposed on the main seeding mechanism and a T-shaped slide rail sleeved on the guide rail groove.

[0011] Furthermore, the locking mechanism includes a housing mounted on a T-shaped slide rail, a spring-loaded column connected to the housing, a limiting rod located within the spring-loaded column, a slip ring sleeved on the limiting rod, a spring mounted on the slip ring, and a U-shaped pull rod connecting the slip ring.

[0012] The locking mechanism also includes a limiting hole on the main seeding mechanism, and the limiting rod is inserted into or disengaged from the limiting hole by pulling the U-shaped pull rod.

[0013] Furthermore, the linkage mechanism includes a guide block disposed on the side seeding mechanism, an inner hole opened on the guide block, a rear control rod inserted into the inner hole and connected to the guide block, and a connecting rod connecting the locking mechanism and the guide block, wherein the rear control rod is fixed on the main seeding mechanism.

[0014] Furthermore, the main sowing mechanism includes a main support, a main triangular support disposed at the lower end of the main support, a main traveling wheel connected to the lower end of the main support and used to control the movement of the main support, a main guide wheel disposed on the main triangular support for guidance, and a handrail disposed at the upper end of the main support. The main traveling wheel and the main guide wheel travel in the same direction.

[0015] Furthermore, the side-seeding mechanism includes a side support, a side triangular support disposed at the lower end of the side support, a side traveling wheel connected to the lower end of the side support and used to control the movement of the side support, and a side guide wheel disposed on the side triangular support for guidance.

[0016] Furthermore, the side wheels and main wheels are equipped with a feeding assembly for storing seeds and then distributing and spreading them. The feeding assembly includes a storage cylinder, a distributing module located at the lower end of the storage cylinder and connected to the storage cylinder, an inlet pipe located at the lower end of the distributing module and connected to the distributing module, and a furrow opener connected to the lower end of the inlet pipe.

[0017] Furthermore, the material distribution module includes a material distribution sleeve, an adjusting sleeve, a seeding spacing adjusting component, and a driving component for rotating the material distribution sleeve and the adjusting sleeve. The material distribution sleeve has an annular groove inside, and a material hole communicating with the annular groove is opened on the outer wall of the material distribution sleeve. Several material holes are equidistantly opened along the circumference of the material distribution sleeve. The adjusting sleeve has an annular structure, and a material storage hole seat is opened on the outer wall of the adjusting sleeve. Several material storage hole seats are irregularly opened along the circumference of the adjusting sleeve. The adjusting sleeve is connected to the material distribution sleeve by being inserted into the annular groove.

[0018] The sowing spacing adjustment component includes a support mounted on the adjustment sleeve, a control rod mounted on the support, and a control position block mounted on the inner circle of the distribution sleeve. Several control position blocks are provided and are equidistantly distributed along the radial direction of the distribution sleeve. The control rod is fixed on the control position block, which makes the material hole on the distribution sleeve correspond to the material storage hole seat on the adjustment sleeve, thereby setting the sowing spacing.

[0019] Furthermore, the driving component includes a main drive shaft connected to the side travel wheel, a drive gear connected to one end of the main drive shaft, an intermediate gear meshing with the drive gear, and a driven gear meshing with the intermediate gear. The driven gear is connected to the material distribution sleeve and is used to drive the material distribution sleeve to rotate.

[0020] Furthermore, the material distribution module also includes a drive ring connected to the drive gear, and a ring brush sleeved on the outside of the drive ring. The outer side of the ring brush has a brush structure, and the ring brush is tangent to the material distribution sleeve.

[0021] As can be seen from the above technical solution, the present invention has the following beneficial effects:

[0022] This portable handheld seeder features adjustable lateral spacing via a spacing control mechanism. The main and side seeding mechanisms are detachably connected, allowing it to meet the needs of small-area planting. Combined with multiple sets of walking wheels, guide wheels, and a hand-held mechanism, the seeder can move stably while simultaneously sowing multiple rows, strictly controlling the lateral seed spacing parameters. The seed distribution module allows for vertical seed spacing adjustment, enabling research on the impact of different lateral and vertical spacings on crop growth efficiency. The number of walking and seeding modules can be adjusted according to actual needs, significantly improving the device's ease of use and applicability. Furthermore, the device occupies little space, is easy to operate, and achieves precise, controllable, and adjustable seeding within a small area. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the main seeding mechanism of the present invention;

[0025] Figure 3 This is a schematic diagram of the side-seeding mechanism of the present invention;

[0026] Figure 4 This is a schematic diagram of the overall exploded structure of the present invention;

[0027] Figure 5 This is an exploded view of the side-seeding mechanism of the present invention;

[0028] Figure 6 This is a schematic diagram of the material distribution module structure of the present invention;

[0029] Figure 7 This is an exploded structural diagram of the material distribution module of the present invention;

[0030] Figure 8 This is a schematic diagram of the housing and compression spring cavity column structure of the present invention.

[0031] In the diagram: Main sowing mechanism 1; Main support 110; Main triangular support 120; Main traveling wheel 130; Main steering wheel 140; Handrail 150; Side sowing mechanism 2; Side support 210; Side triangular support 220; Side traveling wheel 230; Side guide wheel 240; Spacing control mechanism 3; Guide rail groove 311; T-shaped slide rail 312; Housing 321; Compression spring cavity column 322; Limiting rod 323; Slip ring 324; Compression spring 325; U-shaped tie rod 326; Guide block 331; Inner hole 332; Rear control rod 333; Connecting rod 334; Feeding assembly 4; Storage cylinder 410; Distributing module 420; Distributing sleeve 421; Adjusting sleeve 422; Sowing Spacing adjustment component 423; Support 423-1; Control lever 423-2; Control position stop 423-3; Circular groove 424; Material hole 425; Material storage hole seat 426; Main drive shaft 427; Drive gear 428; Intermediate gear 429; Driven gear 4210; Drive ring 4211; Ring brush 4212; Feed pipe 430; Grooving opener 440; Upper box 451; Lower box 452; Material pipe connector 453; Bearing 454; Fixed seat 455; Front control lever 510; Insertion hole 520; Fixed seat 530; Handle 6; Key 7; Key 8; Key 9; Key 10; Shaft 11; Key 12; Driven shaft 13; Key 14; Shim 15. Detailed Implementation

[0032] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Please see Figure 1-8 This invention provides a portable handheld seeder, including a main seeding mechanism 1, a side seeding mechanism 2, and a spacing control mechanism 3. The main seeding mechanism 1 includes a main support 110, a main triangular support 120, a main traveling wheel 130, a main directional wheel 140, and a handle 150. The lower end of the main support 110 is connected to the main traveling wheel 130, and the main traveling wheel 130 controls the movement of the main support. The main triangular support 120 is located at the lower front end of the main support, and the main directional wheel 140 is located at the lower end of the main triangular support 120 for guidance. The handle 150 is located at the upper end of the main support. The main traveling wheel 130 and the main directional wheel 140 travel in the same direction.

[0036] In this embodiment, two sets of side seeding mechanisms 2 are provided, located on the left and right sides of the main seeding mechanism 1, respectively. The side seeding mechanism 2 includes a side support 210, a side triangular support 220, a side traveling wheel 230, and a side guide wheel 240. The lower end of the side support 210 is connected to the side traveling wheel 230, and the side support is controlled to move by the side traveling wheel 230. The side triangular support 220 is located at the lower front end of the side support, and the side guide wheel 240 is provided at the lower end of the side triangular support 220 for guidance. The side traveling wheel 230 and the side guide wheel 240 have the same direction of travel. The movement of the main seeding mechanism 1 and the side seeding mechanism 2 is controlled by pushing the handle.

[0037] The spacing control mechanism 3 connects the main sowing mechanism and the side sowing mechanism. Specifically, the spacing control mechanism 3 includes a sliding mechanism, a locking mechanism and a linkage mechanism. The sliding mechanism includes a guide rail groove 311 and a T-shaped slide rail 312. The guide rail groove 311 is set on the main support 110, and the T-shaped slide rail 312 is sleeved on the guide rail groove, so that the T-shaped slide rail 312 can slide on the guide rail groove 311.

[0038] The locking mechanism includes a housing 321, a spring-loaded column 322, a limiting rod 323, a slip ring 324, a spring 325, and a U-shaped pull rod 326. The housing 321 is fixed on the T-shaped slide rail. There are two of each of the spring-loaded column 322, the limiting rod 323, the slip ring 324, and the spring 325. The limiting rod 323, the slip ring 324, and the spring 325 are located inside the spring-loaded column. The spring-loaded column 322 is connected to one side of the housing. The slip ring 324 is sleeved on the limiting rod 323. The spring 325 is set on the slip ring and sleeved on the limiting rod. The U-shaped pull rod 326 connects the two slip rings.

[0039] The locking mechanism also includes a limiting hole on the main seeding mechanism 1. The limiting rod 323 enters the limiting hole on the main seeding mechanism 1 under the action of the compression spring 325. The limiting rod is inserted into or removed from the limiting hole by pulling the U-shaped pull rod 326. When the limiting rod is removed from the limiting hole, the housing can slide axially along the sliding mechanism. When the limiting rod is inserted into the limiting hole, the housing is locked and the sliding mechanism cannot slide axially.

[0040] The linkage mechanism includes guide blocks 331, rear control rods 333, and connecting rods 334. There are four guide blocks 331, arranged in pairs, and they are correspondingly set on the side supports 210 on the left and right sides. The guide blocks 331 have inner holes. The rear control rods 333 are horizontally set, and their two ends are fixedly connected to the four guide blocks 331 by inserting into the inner holes. The linkage mechanism connects the locking mechanism and the side seeding mechanism, thereby connecting the main seeding mechanism 1 and the side seeding mechanisms on the left and right sides. The linkage mechanism makes the side seeding mechanism 2 and the main seeding mechanism 1 a detachable connection structure.

[0041] To ensure the connection stability between the side seeding mechanism 2 and the main seeding mechanism 1, a front fixing mechanism can also be provided. This front fixing mechanism includes a front control rod 510 and insertion holes 520 opened on the side brackets. The front control rod 510 is fixedly installed on the fixing base 530 and passes through the insertion holes 520 on the left and right side brackets. The fixing base 530 is fixedly installed on the main bracket with screws. The installation method of the rear control rod is the same as that of the front control rod.

[0042] An upper handle 6 is also provided on the housing 321, and the handle 6 is fixedly installed on the housing 321 by screws.

[0043] Two connecting rods 334 are provided, with one end of each rod 334 mounted on the housing 321 via a pin, and the other end mounted on the guide block 331 via a pin. When it is necessary to adjust the distance between the left and right seeding mechanisms and the main seeding mechanism, the U-shaped pull rod 326 can be pulled up, causing the limiting rod 323 to disengage from the limiting hole on the main seeding mechanism 1. At the same time, the handle 6 is pulled, allowing the housing 321 to slide along the guide rail groove 311 on the main support. This changes the distance between the two connecting rods through the connecting rods, guide blocks, and the action of the front and rear control rods, resulting in lateral displacement and achieving the purpose of controlling the position of the left and right seeding mechanisms. When the position is reached, the U-shaped pull rod 326 is released, and the limiting rod 323, under the action of the compression spring 325, re-enters the limiting hole on the main seeding mechanism 1.

[0044] To control the spacing between seed sowing, a feeding assembly 4 is installed on the side-walking wheel 230. The feeding assembly 4 includes a storage cylinder 410, a distributing module 420, an inlet pipe 430, and a furrow opener 440. The distributing module 420 is enclosed in a box, which consists of an upper box 451 and a lower box 452. A rectangular opening is provided at the top of the upper box, which connects to the storage cylinder. The distributing module 420 is connected to the storage cylinder via a bearing 454 and a fixed... The base 455 is assembled together with the upper box 451 and the lower box 452. A material pipe connector 453 is provided at the lower end of the lower box 452. The feed pipe 430 is connected to the material distribution module 420 through the material pipe connector 453. The furrow opener 440 is located at the lower end of the feed pipe. The seeds in the storage cylinder 410 enter the material distribution module through the rectangular opening. After the material distribution module distributes the seeds, it transports them to the feed pipe 430 and finally drops them into the designated position through the furrow opener 440.

[0045] The material distribution module 420 includes a material distribution sleeve 421, an adjusting sleeve 422, a seeding spacing adjusting component 423, and a driving component. The material distribution sleeve 421 has an annular groove 424 inside, and a material hole 425 communicating with the annular groove is opened on the outer wall of the material distribution sleeve 421. Several material holes 425 are equidistantly opened along the circumference of the material distribution sleeve. The adjusting sleeve 422 has an annular structure, and a material storage hole seat 426 is opened on the outer wall of the adjusting sleeve 422. Several material storage hole seats 426 are irregularly opened along the circumference of the adjusting sleeve. The adjusting sleeve 422 is connected to the material distribution sleeve 421 by inserting into the annular groove.

[0046] The sowing spacing adjustment component 423 includes a support 423-1 set on the adjustment sleeve, a control rod 423-2 set on the support, and a control position block 423-3 set on the inner circle of the distribution sleeve. There are three control position blocks 423-3, which are equidistantly distributed along the radial direction of the distribution sleeve. The control rod 423-2 is fixed on the control position block 423-3, which makes the material hole on the distribution sleeve correspond to the material storage hole seat on the adjustment sleeve, thereby setting the spacing between the sown seeds.

[0047] The dispensing module 420 also includes a drive ring 4211 and a ring brush 4212 sleeved on the outside of the drive ring. The outer side of the ring brush 4212 has a brush structure, and the ring brush 4212 is tangent to the dispensing sleeve 421, which can ensure that no excess seeds enter the storage hole seat when the drive gear 428 and the driven gear 4210 rotate in opposite directions.

[0048] The drive unit controls the rotation of the drive ring 4211, ring brush 4212, distributing sleeve, and adjusting sleeve. Specifically, the drive unit includes a main drive shaft 427 connected to the side travel wheel, a drive gear 428, an intermediate gear 429, and a driven gear 4210. The large end of the main drive shaft 427 is assembled with the side travel wheel via key 7, and the drive gear 428 is assembled with the small end of the main drive shaft 427 via key 8. This allows the main drive shaft 427 to transmit the driving force from the side travel wheel to the drive gear 428, which in turn transmits the force through the intermediate gear 4210. Wheel 429 transmits power to driven gear 4210; drive ring 4211 is mounted on the small end of main drive shaft 427 via key 9, enabling synchronous movement between drive gear 428 and drive ring 4211; intermediate gear 429 is mounted on fixed seat 455 via key 10 and shaft 11 via bearing 454; driven gear 4210 is assembled with bearing 454 via key 12, driven shaft 13, and driven shaft 13. At this time, drive gear 428, intermediate gear 429, and driven gear 4210 are all fixed on fixed seat 455 via bearing 454. Distributor sleeve 421 is mounted on driven shaft 13 via key 14.

[0049] The distributing sleeve 421 and the adjusting sleeve 422 are detachable and replaceable structures, allowing for replacement when more different longitudinal planting spacings are required. Furthermore, the drive gear 428 and the driven gear 4210 are identical gears, with the intermediate gear 429 acting as a reversing mechanism, ensuring that the drive gear 428 and the driven gear 4210 are completely synchronized and rotate in opposite directions.

[0050] To prevent interference between their movements, gaskets 15 are provided between the drive ring 4211 and the drive gear 428, and between the driven gear 4210 and the material distribution sleeve 421.

[0051] The spacing of the seeds in the forward direction is determined by three control position blocks and control lever 423-2 installed on the distributing sleeve 421. The control lever 423-2, when positioned on different control position blocks, will align the material holes on the distributing sleeve with the storage holes on the adjusting sleeve, thereby setting the spacing between the seeds. The seeds enter the storage holes 426 on the adjusting sleeve 422 through the material holes on the distributing sleeve 421. Then, as the distributing sleeve 421 rotates, the seeds stored in the storage holes 426 on the adjusting sleeve 422 will enter the designated position through the material pipe connector 453 and the inlet pipe 430, thus completing the sowing of the seeds.

[0052] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A portable handheld seeder, characterized in that, It includes a main seeding mechanism (1), a side seeding mechanism (2) disposed on the side of the main seeding mechanism, and a spacing control mechanism (3) for connecting the main seeding mechanism and the side seeding mechanism. The spacing control mechanism (3) includes: A sliding mechanism is mounted on the main seeding mechanism; A locking mechanism, wherein the locking mechanism is disposed on the sliding mechanism, and the sliding mechanism is controlled to slide or lock; and A linkage mechanism, which connects the locking mechanism and the side-seeding mechanism; The distance between the seeding mechanism (2) on the control side of the linkage mechanism and the main seeding mechanism (1) is increased by moving the sliding mechanism; Furthermore, the side seeding mechanism (2) and the main seeding mechanism (1) are detachably connected through the linkage mechanism; The sliding mechanism includes a guide rail groove (311) provided on the main seeding mechanism, and a T-shaped slide rail (312) sleeved on the guide rail groove. The locking mechanism includes a housing (321) mounted on a T-shaped slide rail, a spring cylinder (322) connected to the housing, a limiting rod (323) located inside the spring cylinder, a slip ring (324) sleeved on the limiting rod, a spring (325) mounted on the slip ring, and a U-shaped pull rod (326) connecting the slip ring. The locking mechanism also includes a limiting hole on the main seeding mechanism (1), and the limiting rod is controlled to insert or disengage from the limiting hole by pulling the U-shaped pull rod (326).

2. The portable handheld seeder according to claim 1, characterized in that: The linkage mechanism includes a guide block (331) set on the side seeding mechanism, an inner hole (332) opened on the guide block, a rear control rod (333) inserted into the inner hole and connected to the guide block, and a connecting rod (334) connecting the locking mechanism and the guide block. The rear control rod (333) is fixed on the main seeding mechanism (1).

3. A portable handheld seeder according to claim 1, characterized in that: The main seeding mechanism (1) includes a main support (110), a main triangular support (120) located at the lower end of the main support, a main traveling wheel (130) connected to the lower end of the main support and used to control the movement of the main support, a main guide wheel (140) located on the main triangular support for guidance, and a handrail (150) located at the upper end of the main support. The main traveling wheel (130) and the main guide wheel (140) travel in the same direction.

4. A portable handheld seeder according to claim 3, characterized in that: The side-seeding mechanism (2) includes a side support (210), a side triangular support (220) disposed at the lower end of the side support, a side walking wheel (230) connected to the lower end of the side support and used to control the movement of the side support, and a side guide wheel (240) disposed on the side triangular support for guidance.

5. A portable handheld seeder according to claim 4, characterized in that: The side walking wheels (230) and the main walking wheels (130) are provided with a feeding assembly (4) for storing seeds and then distributing and spreading them. The feeding assembly (4) includes a storage cylinder (410), a distributing module (420) located at the lower end of the storage cylinder and connected to the storage cylinder, an inlet pipe (430) located at the lower end of the distributing module and connected to the distributing module, and a furrow opener (440) connected to the lower end of the inlet pipe.

6. A portable handheld seeder according to claim 5, characterized in that: The material distribution module (420) includes a material distribution sleeve (421), an adjusting sleeve (422), a seeding spacing adjusting component (423), and a driving component for rotating the material distribution sleeve and the adjusting sleeve. The material distribution sleeve (421) has an annular groove (424) inside, and a material hole (425) communicating with the annular groove is opened on the outer wall of the material distribution sleeve (421). Several material holes (425) are equidistantly opened along the circumferential direction of the material distribution sleeve. The adjusting sleeve (422) has an annular structure, and a material storage hole seat (426) is opened on the outer wall of the adjusting sleeve (422). Several material storage hole seats (426) are irregularly opened along the circumferential direction of the adjusting sleeve. The adjusting sleeve (422) is connected to the material distribution sleeve (421) by inserting into the annular groove. The sowing spacing adjustment component (423) includes a support (423-1) on the adjustment sleeve, a control rod (423-2) on the support, and a control position block (423-3) on the inner circle of the distribution sleeve. Several control position blocks (423-3) are provided and are equidistantly distributed along the radial direction of the distribution sleeve. The control rod (423-2) is fixed on the control position block (423-3), which will make the material hole on the distribution sleeve correspond to the material storage hole seat on the adjustment sleeve, thereby setting the sowing spacing.

7. A portable handheld seeder according to claim 6, characterized in that: The driving component includes a main drive shaft (427) connected to the side walking wheel, a drive gear (428) connected to one end of the main drive shaft, an intermediate gear (429) meshing with the drive gear, and a driven gear (4210) meshing with the intermediate gear. The driven gear (4210) is connected to the material distribution sleeve (421) and is used to drive the material distribution sleeve to rotate.

8. A portable handheld seeder according to claim 6, characterized in that: The material distribution module (420) also includes a drive ring (4211) connected to the drive gear, and a ring brush (4212) sleeved on the outside of the drive ring. The outer side of the ring brush (4212) is a brush structure, and the ring brush (4212) is tangent to the material distribution sleeve (421).

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