A powder falling device capable of preventing powder from being stuck and capable of uniformly discharging powder

Abstract

This utility model discloses a powder feeding device that prevents powder jamming and ensures uniform powder feeding, relating to the field of powder feeding technology. It includes a storage bin, a feeding hopper, a feeding shaft, a ratchet striking module, and a motor drive assembly. The storage bin is connected to the feeding hopper for powder supply. The feeding channel within the feeding hopper includes a funnel-shaped receiving port, a cavity, and a feeding outlet. The feeding shaft is located in the cavity, with evenly distributed receiving grooves on its surface. One end is connected to the ratchet striking module, and the other end is connected to a motor. In the ratchet striking module, the ratchet rotates with the shaft, and the end of the striking block, pulled by a tension spring, corresponds to the ratchet groove, generating high-frequency vibration. This device quantitatively controls powder feeding through the receiving grooves, and the vibration prevents powder residue and jamming. Furthermore, the oil seals at both ends of the shaft prevent leakage and moisture absorption, effectively solving problems such as powder flow interruption, uneven feeding, blockage, and powder adhesion.

Description

Technical Field

[0001] This utility model relates to the field of powder feeding technology, and in particular to a powder feeding device that prevents powder jamming and ensures uniform powder feeding. Background Technology

[0002] In the conveying and feeding process of powdered materials (such as powder spreading in 3D printing), the stability and uniformity of the powder dispensing device directly affect the quality of the final product. However, existing powder dispensing devices often face the following technical problems in practical applications:

[0003] Powdered materials are prone to reduced flowability due to high humidity and electrostatic adsorption, resulting in intermittent descent and causing localized gaps or uneven thickness in the powder layer. For example, in 3D printing, uneven powder layer thickness can directly lead to insufficient structural strength of the printed workpiece, and even defects such as support warping, ultimately causing the workpiece to be scrapped.

[0004] The powder feeding hopper's discharge port and powder discharge channel are prone to blockage due to powder agglomeration, foreign matter contamination, or mechanical obstruction. Especially after the equipment has been shut down for a long time, the powder is prone to moisture absorption and forming brittle formations at the powder discharge port, resulting in poor material discharge when restarting. This requires frequent manual intervention (such as tapping and cleaning), which not only affects production efficiency but may also cause powder contamination or equipment damage due to improper manual operation. Utility Model Content

[0005] To address the technical problems existing in the background art, this utility model proposes a powder feeding device that prevents powder jamming and ensures uniform powder feeding.

[0006] This utility model proposes a powder feeding device for preventing powder jamming and ensuring uniform powder feeding, including a feeding hopper. A feeding shaft is rotatably connected inside the feeding hopper. The end of the feeding shaft extends to the outside of the feeding hopper and is connected to a ratchet striking module. The ratchet striking module includes a base and a ratchet installed at the end of the feeding shaft. The ratchet rotates in a specific direction with the feeding shaft. A striking block is rotatably connected to the top of the base. A tension spring is connected between the base and the striking block. The end of the striking block corresponds to any ratchet groove of the ratchet.

[0007] Furthermore, a feeding channel is provided inside the feeding hopper to facilitate the discharge of powdered materials to the outside of the feeding hopper.

[0008] Furthermore, several identical receiving grooves are evenly distributed around the surface of the feeding shaft to control the feeding of powdered materials.

[0009] Furthermore, hanging rods are installed on the bottom of the base and the side of the striking block, and hanging grooves are opened at the ends of the hanging rods, with the two ends of the tension springs hooked inside the hanging grooves.

[0010] Furthermore, a motor mounting base is installed at the end of the feeding bin away from the ratchet striking module, and a motor is installed at the end of the motor mounting base. The drive end of the motor is connected to the feeding shaft through a coupling.

[0011] Furthermore, a storage box is installed at the top of the feeding hopper, and the feeding hopper and the storage box are connected.

[0012] Furthermore, the feeding channel includes a connected receiving port, a cavity, and a feeding port. The receiving port is configured as a funnel-shaped structure that expands towards the storage box. The cavity is a circular cavity. The feeding shaft rotates inside the cavity, and the size of the cavity is adapted to the feeding shaft. The feeding port is located at the bottom on the opposite side of the receiving port.

[0013] The beneficial effects of this utility model are as follows: A ratchet structure has been added to the powder rotating shaft, which effectively avoids situations such as powder not flowing and uneven powder distribution. During the rotation of the motor, the powder rotating shaft is driven to rotate. The ratchet, under the action of the tension spring, continuously taps the powder rotating shaft, so that the powder can fall evenly each time it is dispensed, without powder jamming or uneven distribution. This effectively solves the problem of uneven powder dispensing, which leads to uneven powder spreading and workpiece edge curling and scrapping. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the disassembled structure of this utility model;

[0015] Figure 2 This is a first-view structural diagram of the present invention after assembly;

[0016] Figure 3 This is a structural schematic diagram of the present invention from a second perspective after assembly;

[0017] Figure 4 This is a schematic diagram of the structure of the feeding shaft in this utility model;

[0018] Figure 5 This is a schematic diagram of the ratchet striking module in this utility model;

[0019] Figure 6 This is a half-sectional view of the assembled version of this utility model.

[0020] In the diagram: 1. Feeding bin; 11. Feeding channel; 111. Receiving port; 112. Cavity; 113. Feeding port; 2. Feeding shaft; 21. Receiving groove; 3. Ratchet striking module; 31. Base; 32. Ratchet; 33. Striking block; 34. Tension spring; 35. Hanging rod; 36. Hanging groove; 4. Motor mounting base; 5. Motor; 6. Coupling; 7. Storage box. Detailed Implementation

[0021] Reference Figure 1-6 This utility model proposes a powder feeding device for preventing powder jamming and ensuring uniform powder feeding, which mainly consists of a storage box 7, a feeding bin 1, a feeding shaft 2, a ratchet striking module 3, and a motor drive assembly. The specific technical solution is as follows:

[0022] The storage bin 7 is installed at the top of the feeding bin 1, and the two are connected internally. It is used to store powdered materials to be fed and to continuously supply powder to the entire device.

[0023] The feeding hopper 1 has a feeding channel 11 inside, which consists of a receiving port 111, a cavity 112, and a feeding port 113 connected from top to bottom. The receiving port 111 is a funnel-shaped structure that flares out towards the storage box 7, which can efficiently receive the powder falling from the storage box 7. The cavity 112 is a circular cavity whose size is adapted to the feeding shaft 2, providing rotation space for the feeding shaft 2. The feeding port 113 is located at the bottom on the opposite side of the receiving port 111 and is used to discharge the powder to the outside of the device.

[0024] The feeding shaft 2 is rotatably connected to the cavity 112 of the feeding bin 1. Several identical receiving grooves 21 are evenly opened around its surface to quantitatively receive powder and control the feeding amount. One end of the feeding shaft 2 extends to the outside of the feeding bin 1 and is connected to the ratchet striking module 3. The other end is connected to the drive end of the motor 5 through the coupling 6.

[0025] The motor drive assembly includes a motor mounting base 4, a motor 5, and a coupling 6. The motor mounting base 4 is fixed to one end of the unloading bin 1 away from the ratchet striking module 3. The motor 5 is mounted on the end of the motor mounting base 4 and transmits power to the unloading shaft 2 through the coupling 6 to drive it to rotate stably.

[0026] The ratchet striking module 3 consists of a base 31, a ratchet 32, a striking block 33, a tension spring 34, and a hanging rod 35. The ratchet 32 ​​is fixed to the end of the feeding shaft 2 extending outside the bin and rotates clockwise with the feeding shaft 2. The base 31 is located on the outside of the feeding bin 1, and its top end is rotatably connected to the striking block 33. The bottom of the base 31 and the side of the striking block 33 are respectively equipped with hanging rods 35. The end of the hanging rod 35 is provided with a hanging groove 36. The two ends of the tension spring 34 are hooked into the hanging groove 36. The end of the striking block 33 always corresponds to any ratchet groove of the ratchet 32.

[0027] In addition, a sealing structure is set up, with oil seals at both ends of the feeding shaft 2, reducing gaps caused by the splicing of multiple parts, greatly improving the overall sealing performance of the device, and preventing powder leakage or moisture.

[0028] Work process:

[0029] The storage bin 7 is filled with powder to be fed. The powder falls to the receiving port 111 of the feeding bin 1 by its own gravity, and under the guidance of the funnel-shaped structure of the receiving port 111, it gathers to the top of the cavity 112. At this time, the receiving groove 21 of the feeding shaft 2 is distributed with the position of the shaft, and some of the receiving grooves 21 are directly below the receiving port 111, ready to receive the powder.

[0030] Start motor 5. Motor 5 drives the feeding shaft 2 to rotate clockwise at a constant speed in cavity 112 through coupling 6. When the receiving groove 21 on the feeding shaft 2 rotates to below the receiving port 111, the powder falls into the receiving groove 21, realizing quantitative feeding. As the shaft continues to rotate clockwise, the receiving groove 21 containing powder gradually deviates from the receiving port 111 and turns towards the feeding port 113. When the receiving groove 21 is connected to the feeding port 113, the powder inside is evenly discharged through the feeding port 113 under its own gravity, completing one feeding cycle.

[0031] During the clockwise rotation of the feeding shaft 2, the ratchet 32 ​​rotates synchronously with it. Due to the tension of the tension spring 34, the end of the striking block 33 always fits against the ratchet groove of the ratchet 32. Because of the height difference between the tops of two adjacent ratchet grooves of the ratchet 32, when the ratchet 32 ​​rotates clockwise, under the pulling action of the tension spring 34, the end of the striking block 33 will strike the ratchet 32, thereby generating high-frequency vibration. The vibration is transmitted to the feeding shaft 2, and the vibration effect is applied to the powder in the receiving groove 21, so that no residue is left inside the receiving groove 21 each time it is unloaded, ensuring that the amount of material unloaded each time is consistent and solving the problem of local missing or uneven thickness of the powder layer.

[0032] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A powder feeding device for preventing powder jamming and ensuring uniform powder feeding, characterized in that, The device includes a feeding bin (1), which is rotatably connected to a feeding shaft (2). The end of the feeding shaft (2) extends to the outside of the feeding bin (1) and is connected to a ratchet striking module (3). The ratchet striking module (3) includes a base (31) and a ratchet (32) installed at the end of the feeding shaft (2). The ratchet (32) rotates in a direction following the feeding shaft (2). The top of the base (31) is rotatably connected to a striking block (33). A tension spring (34) is connected between the base (31) and the striking block (33). The end of the striking block (33) corresponds to any ratchet groove of the ratchet (32).

2. The powder feeding device for preventing powder jamming and ensuring uniform powder feeding according to claim 1, characterized in that, The material feeding hopper (1) has a material feeding channel (11) inside to facilitate the discharge of powdered materials to the outside of the material feeding hopper (1).

3. The powder feeding device for preventing powder jamming and ensuring uniform powder feeding according to claim 1, characterized in that, The surface of the feeding shaft (2) is evenly provided with several identical receiving grooves (21) to control the feeding of powdered materials.

4. The powder feeding device for preventing powder jamming and ensuring uniform powder feeding according to claim 1, characterized in that, Hanging rods (35) are installed on the bottom of the base (31) and the side of the striking block (33). The end of the hanging rod (35) is provided with a hanging groove (36), and the two ends of the tension spring (34) are attached to the inside of the hanging groove (36).

5. The powder feeding device for preventing powder jamming and ensuring uniform powder feeding according to claim 1, characterized in that, The end of the feeding bin (1) away from the ratchet striking module (3) is equipped with a motor mounting base (4), and a motor (5) is installed at the end of the motor mounting base (4). The drive end of the motor (5) is connected to the feeding shaft (2) through a coupling (6).

6. The powder feeding device for preventing powder jamming and ensuring uniform powder feeding according to claim 1, characterized in that, The top of the feeding bin (1) is equipped with a storage box (7), and the feeding bin (1) and the storage box (7) are connected.

7. The powder feeding device for preventing powder jamming and ensuring uniform powder feeding according to claim 2, characterized in that, The feeding channel (11) includes a connected receiving port (111), a cavity (112), and a feeding port (113). The receiving port (111) is configured as a flared structure facing the storage box (7). The cavity (112) is a circular cavity. The feeding shaft (2) rotates inside the cavity (112), and the size of the cavity (112) is adapted to the size of the feeding shaft (2). The feeding port (113) is located at the bottom on the opposite side of the receiving port (111).

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