Powder quantitative distribution device and equipment

Abstract

The utility model discloses a powder quantitative distribution device and equipment, which comprises a fixed frame, a first driving component, a first driven gear, a grid plate structure, a photoelectric sensor, a transmission component and a quantitative blanking component, the first driven gear is in transmission connection with the first driving component, and the first driving component can drive the first driven gear to rotate; the grid plate structure is fixedly arranged on one side of the first driven gear, the photoelectric sensor is used for detecting the rotation angle of the grid plate structure, the transmission assembly is in transmission connection with the first driven gear, and the quantitative discharging assembly is in transmission connection with the transmission assembly. The first driving assembly drives the first driven gear to rotate so as to drive the grid plate structure to rotate, and then the rotation angle and the rotation turns of the grid plate structure are detected through the photoelectric sensor, so that the first driving assembly is controlled to drive the rotation angle of the first driven gear; and finally, the transmission assembly is controlled to transmit the power to the quantitative discharging assembly, so that the quantitative discharging assembly can perform accurate discharging.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of powder rationing device and equipment. BACKGROUND

[0002] In the current powder dispensing equipment market, there are various products, aiming to meet the needs of a wide range from industrial production to daily life. However, these devices differ significantly in function, precision and cost. For devices with high-precision rationing needs, their internal structures are often quite complex to ensure the accuracy and consistency of powder dispensing. This complexity not only drives up the cost of manufacturing the device, but also puts higher demands on its daily maintenance and internal cleaning. Because these high-end devices are complicated to operate and expensive, they are mostly limited to professional use and difficult to enter the general household market for widespread popularity. Therefore, we provide a powder rationing device and equipment to solve the above problems. SUMMARY

[0003] The utility model aims at overcoming the shortcomings of prior art, and provides a kind of powder rationing device and equipment.

[0004] The utility model achieves the purpose by the following technical solutions:

[0005] A powder rationing device includes:

[0006] A fixed frame;

[0007] A first drive assembly is fixedly installed on the fixed frame;

[0008] A first driven gear is in transmission connection with the first drive assembly, and the first drive assembly can drive the first driven gear to rotate;

[0009] A grid structure is fixedly arranged on one side of the first driven gear, and the grid structure rotates with the first driven gear;

[0010] A photoelectric sensor is fixedly installed on the fixed frame, and the photoelectric sensor is located on the rotation track of the grid structure. The photoelectric sensor is used to detect the rotation angle of the grid structure;

[0011] A transmission assembly is in transmission connection with the first driven gear, and the first driven gear can be driven by the transmission assembly;

[0012] A rationing and discharging assembly is fixedly installed on the fixed frame, and the rationing and discharging assembly is in transmission connection with the transmission assembly.

[0013] Preferably, the first driving assembly comprises a first rotating driving member fixedly installed on the fixed frame, a power output end of the first rotating driving member is fixedly installed with a first driving gear, and the first driving gear is in meshing transmission with the first driven gear.

[0014] Preferably, the grid plate structure comprises a rotating plate fixedly connected with the first driven gear, an outer circumferential surface of the rotating plate is provided with a plurality of convex plates extending radially outward, and adjacent two convex plates define a grid.

[0015] Preferably, the quantitative feeding assembly comprises a housing fixedly installed on the fixed frame, the housing is provided with a discharge port and a feeding port, a worm is arranged in the housing, an end surface of the worm away from the discharge port is provided with a transmission groove, a hopper is fixedly arranged at the position of the feeding port, and the hopper is in communication with the inside of the housing.

[0016] Preferably, the sealing assembly is further slidably installed on the fixed frame, the sealing assembly comprises a rack slidably installed on the fixed frame, a first mounting bracket is arranged at an end of the rack towards the discharge port of the housing, a second mounting bracket is arranged at an end of the rack away from the first mounting bracket, a cover structure is detachably installed on the first mounting bracket, and the cover structure moves along with the rack.

[0017] Preferably, a clamping groove is arranged on the first mounting bracket, the cover structure comprises a sleeve in a hollow shape, a clamping block is arranged at an end of the sleeve towards the first mounting bracket, the clamping block is clamped into the clamping groove, an enclosing plate is arranged at an end of the sleeve away from the first mounting bracket, and the enclosing plate is closed, and a discharge pipe in communication with the inside of the sleeve is arranged on the outer wall of the sleeve.

[0018] Preferably, a second driving assembly for driving the rack to move is fixedly installed on the fixed frame, the second driving assembly comprises a second rotating driving member fixedly installed on the fixed frame, a second driving gear is installed at a power output end of the second rotating driving member, and the second driving gear is in meshing connection with the rack.

[0019] Preferably, the transmission assembly comprises a second driven gear rotatably installed on one side support of the fixed frame, a transmission hole is arranged at an axial center position of the second driven gear, a transmission shaft is slidably arranged in the transmission hole, the transmission shaft is rotatably installed on the second mounting bracket, and a transmission block is arranged at an end of the transmission shaft away from the second driven gear.

[0020] A position sensor is fixedly installed on the fixed frame, and the position sensor is located at a moving path position of the rack.

[0021] Preferably, the hopper is internally provided with a stirring assembly connected with the worm gear, the stirring assembly is rotatably installed in the hopper, the hopper comprises a rotating shaft rotatably installed on the inner wall of the hopper, a stirring gear is fixedly installed on the rotating shaft, the stirring gear is in meshing transmission with the worm gear, and a plurality of stirring shafts are arranged on at least one axial end surface of the stirring gear.

[0022] The application also provides a powder rationing and dispensing device comprising the powder rationing and dispensing device.

[0023] The utility model has the following advantages:

[0024] 1、 the utility model discloses a first drive assembly drives the rotation of first driven gear, and then drives the rotation of the grid structure, and then detects the rotation angle and the number of rotations of the grid structure through the photoelectric sensor, thereby controlling the rotation angle of the first drive assembly driven first driven gear, and finally controlling the transmission assembly to transmit power to the precision of the quantitative feeding assembly, so that the quantitative feeding assembly can accurately feed.

[0025] 2、 the utility model discloses that first rotary drive part drives the rotation of first driving gear, and the power is transmitted to the quantitative feeding assembly through the meshing of first driving gear and first driven gear and the transmission system formed by first driving gear, first driven gear and transmission assembly, so that the power transmission is realized.

[0026] 3、 the utility model discloses that the material cover structure moves along with the rack, so that the material cover structure can be moved to the position of the shell discharge port, and the discharge port is closed, so that the powder in the shell is prevented from being contacted with the external environment and being damp and caked when not in use. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a schematic view of the utility model in the overall assembly state.

[0028] Figure 2 It is a schematic view of the utility model in the overall assembly state.

[0029] Figure 3 It is a schematic view of the utility model in the overall assembly state.

[0030] Figure 4 It is a schematic view of the utility model in the overall assembly state.

[0031] Figure 5 It is a schematic view of the utility model in the overall assembly state.

[0032] Figure 6 It is a schematic view of the utility model in the overall assembly state.

[0033] Figure 7 It is the whole cross section schematic view of the material cover structure of the utility model under the state of closing the shell discharge port.

[0034] Figure 8 It is the whole cross section schematic view of the material cover structure of the utility model under the state of closing the shell discharge port.

[0035] Figure 9 It is the whole cross section schematic view of the material cover structure of the utility model under the state of closing the shell discharge port.

[0036] In the drawing, 100, fixed frame;200, first drive assembly;210, first rotary drive part;220, first driving gear;300, first driven gear;400, grid structure;410, rotary plate;420, convex plate;430, grid;500, photoelectric sensor;600, transmission assembly;610, second driven gear;620, transmission hole;630, transmission shaft;640, transmission block;700, quantitative feeding assembly;710, shell;720, worm;721, transmission groove;730, hopper;800, sealing assembly;810, rack;820, first mounting frame;821, clamping groove;830, second mounting frame;840, material cover structure;841, sleeve;842, sealing plate;843, discharge pipe;844, clamping block;900, second drive assembly;910, second rotary drive part;920, second driving gear;1000, stirring assembly;1010, rotary shaft;1020, stirring gear;1030, stirring shaft;1100, position sensor. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical scheme and advantage of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. The components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0038] In the description of the utility model, it also needs to be explained that, unless there is explicit provision and limitation, the terms "arrangement", "installation", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected;It can be mechanical connection, or electrical connection;It can be directly connected, or indirectly connected through intermediate medium, or the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0039] As Figure 1 — Figure 9The embodiment is shown.

[0040] The embodiment provides a powder quantitative dispensing device, which comprises a fixing frame 100, a first driving assembly 200, a first driven gear 300, a grid structure 400, a photoelectric sensor 500, a transmission assembly 600 and a quantitative discharging assembly 700.

[0041] Specifically, the first driving assembly 200 is fixedly installed on the fixing frame 100, the first driven gear 300 is in transmission connection with the first driving assembly 200, the first driving assembly 200 can drive the first driven gear 300 to rotate, the grid structure 400 is fixedly arranged on one side of the first driven gear 300, the grid structure 400 rotates along with the first driven gear 300, the photoelectric sensor 500 is fixedly installed on the fixing frame 100, the photoelectric sensor 500 is located on the rotation track of the grid structure 400, the photoelectric sensor 500 is used for detecting the rotation angle of the grid structure 400, the transmission assembly 600 is in transmission connection with the first driven gear 300, the first driven gear 300 can be driven through the transmission assembly 600, and the quantitative discharging assembly 700 is fixedly installed on the fixing frame 100 and in transmission connection with the transmission assembly 600.

[0042] Referring to Figure 1 , Figure 2 and Figure 3 in the embodiment, the power from the first driving assembly 200 is transmitted to the quantitative discharging assembly 700 through cooperation of the first driven gear 300 and the transmission assembly 600, in order to accurately control the precision of driving the transmission assembly 600 to work, the photoelectric sensor 500 is used to detect the number of rotations and the angle of the grid structure 400 located on one side of the first driven gear 300, since the grid structure 400 rotates synchronously with the first driven gear 300, the number of rotations and the angle of the grid structure 400 are detected, and the number of rotations and the angle of the first driven gear 300 are also detected, through the transmission ratio, the number of rotations and the angle of the worm 720 rotating through the transmission assembly 600 to transmit the rotary power to the quantitative discharging assembly 700 can be accurately known, and the amount of discharging can be accurately controlled.

[0043] The first driving assembly 200 comprises a first rotary driving piece 210 fixedly installed on the fixing frame 100, a power output end of the first rotary driving piece 210 is fixedly installed with a first driving gear 220, and the first driving gear 220 is in mesh transmission with the first driven gear 300.

[0044] In the embodiment, the first rotating driving member 210 serves as the power for the quantitative dosing assembly 700 to work. Specifically, the first rotating driving member 210 drives the first driving gear 220 to rotate, and then transmits the power from the first rotating driving member 210 to the transmission assembly 600 in the state that the first driving gear 220 is engaged with the first driven gear 300, and then transmits the power to the quantitative dosing assembly 700 through the transmission assembly 600, so as to realize the transmission of the rotation from the first rotating driving member 210.

[0045] In one embodiment, the first rotating driving member 210 is an electric motor, and further, the first rotating driving member 210 is a servo motor. It can be understood that the servo motor is more accurate in the control of the rotation angle and the number of rotations than the ordinary motor, and in the embodiment, a corresponding control processor is further included, which processes the rotation angle and the number of rotations of the grating structure 400 detected and collected by the photoelectric sensor 500, cooperates with the transmission ratio between the first rotating driving member 210, the first driven gear 300 and the transmission assembly 600, and controls the rotation angle and the number of rotations of the first rotating driving member 210 driven by the first rotating driving member 210, so that the rotation angle and the number of rotations of the worm 720 of the quantitative dosing assembly 700 driven by the transmission assembly 600 reach the predetermined value, and further, the weight of the discharged powder is more accurate.

[0046] The grating structure 400 includes a rotating plate 410 fixedly connected with the first driven gear 300, and a plurality of convex plates 420 extending radially outward are arranged on the outer circumferential surface of the rotating plate 410, and the adjacent two convex plates 420 define a grating 430.

[0047] Referring to Figure 2 It can be understood that the rotating plate 410 can drive the convex plate 420 to rotate, and the position of the photoelectric sensor 500 is fixed. When the convex plate 420 rotates to the position of the photoelectric sensor 500, the convex plate 420 blocks the light from the photoelectric sensor 500 at this time. When the grating 430 rotates to the position of the photoelectric sensor 500, the grating 430 can make the light from the photoelectric sensor 500 pass through, so that the photoelectric sensor 500 can detect the change of the light under the action of the convex plate 420 and the grating 430, and convert the optical signal into an electrical signal, so as to realize the measurement of the rotation angle. Since the number of the convex plates 420 and the gratings 430 on the rotating plate 410 is certain, the number of rotations can also be detected. It should be noted that the detection of the angle and the number of rotations of the rotating plate by the photoelectric sensor 500 is the prior art, and the detailed specific principle will not be described here.

[0048] The quantitative feeding assembly 700 comprises a shell 710 fixedly installed on the fixed frame 100, the shell 710 has a discharge port and a feeding port, a worm 720 is arranged in the shell 710, an end face of the worm 720 away from the discharge port is provided with a transmission groove 721, and a hopper 730 is fixedly arranged at the feeding port and communicates with the inside of the shell 710.

[0049] As shown in Figure 3 , Figure 4 , Figure 7 and Figure 8 , both ends of the shell 710 in the axial direction are open, one end is the discharge port, and the other end is the power transmission installation port, and a hopper 730 is arranged in the radial direction of the shell 710, the hopper 730 is used for storing powder products, the hopper 730 communicates with the inside of the shell 710, the worm 720 is rotatably installed in the shell 710, the worm 720 extends to the power transmission installation port, and an end face of the worm 720 away from the discharge port is provided with the transmission groove 721. It can be understood that the transmission groove 721 is connected with the transmission assembly 600 in a clamping transmission mode, and the power from the first driving assembly 200 is transmitted to the worm 720 through the transmission assembly 600 and the first driven gear 300, so as to drive the worm 720 to rotate, and the powder products from the hopper 730 are quantitatively fed out, and the discharged powder products are discharged from the discharge port.

[0050] It should be noted that the working mode of the worm 720 rotating to realize feeding can refer to the principle of the auger conveyor, and the auger conveyor is a prior art, and the working principle of the auger conveyor will not be described in detail here.

[0051] The sealing assembly 800 slidably installed on the fixed frame 100 further comprises a rack 810 slidably installed on the fixed frame 100, a first mounting frame 820 arranged at an end of the rack 810 towards the discharge port of the shell 710, a second mounting frame 830 arranged at an end of the rack 810 away from the first mounting frame 820, a material cover structure 840 detachably mounted on the first mounting frame 820, and the material cover structure 840 moves with the rack 810.

[0052] As shown in Figure 5 , Figure 7 , Figure 8 and Figure 9As shown, by driving the rack 810 to move along the axial direction of the shell 710, the cover structure 840 mounted with the first mounting frame 820 is moved, and it can be understood that the cover structure 840 is located at the outlet side of the shell 710, when it is needed to close the outlet, the rack 810 drives the cover structure 840 to move towards the outlet position, until the cover structure 840 closes the outlet, preventing the powder product in the shell 710 from contacting the external environment and being damp and caked.

[0053] The first mounting frame 820 is provided with a clamping groove 821, the cover structure 840 includes a sleeve 841 in a hollow shape, the end of the sleeve 841 towards the first mounting frame 820 is provided with a clamping block 844, the clamping block 844 is deeply clamped into the clamping groove 821, the end of the sleeve 841 away from the first mounting frame 820 is provided with a sealing plate 842 closing the end, and the outer wall of the sleeve 841 is provided with a discharge pipe 843 communicating with the inside.

[0054] Please continue to refer to Figure 5 As shown, when the quantitative feeding assembly 700 is not needed to be used, the sleeve 841 is in a barrel shape, the sleeve 841 is detachably connected and mounted with the first mounting frame 820, and the end of the sleeve 841 away from the shell 710 is closed by the sealing plate 842, and the outer wall of the sleeve 841 is provided with a discharge pipe 843 communicating with the sleeve 841, and it needs to be noted that when the rack 810 drives the sleeve 841 to move, the sleeve 841 will be first sleeved on the shell 710, and then the sealing plate 842 will be in contact with the shell 710 to achieve closure as the sleeve 841 continues to move with the rack 810; when the quantitative feeding assembly 700 needs to be used, the rack 810 drives the sleeve 841 to move away from the shell 710, at this time the sealing plate 842 removes the closure of the outlet of the shell 710, and it needs to be noted that after the closure of the outlet is removed, the sleeve 841 will also be partially sleeved on the shell 710, that is, the sleeve 841 is always sleeved on the shell 710, and the powder product is discharged from the outlet of the shell 710 through the discharge pipe 843.

[0055] Further, in the embodiment, a magnet is fixedly arranged on the end face of the worm 720 towards the cover structure 840, and a magnet is also fixedly mounted on the end face of the sealing plate 842 towards the shell 710, when the sealing plate 842 closes the outlet, at this time the magnet on the worm 720 and the magnet on the sealing plate 842 are magnetically attracted, so that the end face of the sealing plate 842 is always in contact with the outlet position of the shell 710 to achieve sealing.

[0056] Please continue to refer to Figure 5As shown, in order to realize the detachable connection between the sleeve 841 and the first mounting frame 820, a clamping groove 821 is formed on the first mounting frame 820, and a clamping block 844 is arranged on the sleeve 841. When installing, the sleeve 841 only needs to be inserted into the clamping groove 821 to complete the installation. When disassembling, the clamping block 844 only needs to be separated from the clamping groove 821 to complete the disassembly.

[0057] The fixed frame 100 is fixedly provided with a second driving assembly 900 for driving the rack 810 to move. The second driving assembly 900 comprises a second rotating driving member 910 fixedly provided on the fixed frame 100. A power output end of the second rotating driving member 910 is provided with a second driving gear 920. The second driving gear 920 is in meshing connection with the rack 810.

[0058] As shown in Figure 3 , Figure 4 and Figure 9 , when the rack 810 needs to be driven to move along the direction of the shell 710, the second rotating driving member 910 is started to drive the second driving gear 920 to rotate. The second driving gear 920 drives the rack 810 to move in the meshing transmission state, thereby driving the cover structure 840 to move.

[0059] The transmission assembly 600 comprises a second driven gear 610 rotatably provided on a support of one side of the fixed frame 100. An axial center position of the second driven gear 610 is provided with a transmission hole 620. A transmission shaft 630 is slidably arranged in the transmission hole 620. The transmission shaft 630 is rotatably provided on the second mounting frame 830. An end portion of the transmission shaft 630 away from the second driven gear 610 is provided with a transmission block 640.

[0060] As shown in Figure 3 , Figure 4 , Figure 6 , Figure 7 and Figure 8 , the second driven gear 610 and the first driven gear 300 are both rotatably provided on a support (not shown in the figure) of one side of the fixed frame 100. Since the transmission shaft 630 can move relative to the second driven gear 610 in the axial direction, and the transmission shaft 630 is rotatably provided on the second mounting frame 830, the transmission shaft 630 can move together with the second mounting frame 830 to follow the rack 810. Under the clamping transmission of the transmission shaft 630 and the transmission hole 620, the second driven gear 610 can drive the transmission shaft 630 to rotate, thereby driving the transmission block 640 at the end portion of the transmission shaft 630 to rotate. It should be noted that the transmission block 640 is clamped and matched with the transmission groove 721, that is, after the transmission block 640 is inserted into the transmission groove 721, the transmission block 640 can be clamped to realize the transmission.

[0061] In the embodiment, the shapes of the transmission hole 620 and the transmission shaft 630 are not limited here, and the transmission shaft 630 can be axially moved while achieving rotation transmission. Similarly, the shapes of the transmission block 640 and the transmission groove 721 are not limited, and the transmission block 640 can be deep into the transmission groove 721 to achieve transmission.

[0062] The hopper 730 is internally provided with a stirring assembly 1000 in transmission connection with the worm 720. The stirring assembly 1000 is rotatably installed in the hopper 730. The hopper 730 includes a rotating shaft 1010 rotatably installed on the inner wall of the hopper 730. The rotating shaft 1010 is fixedly installed with a stirring gear 1020. The stirring gear 1020 is in meshing transmission with the worm 720. The stirring gear 1020 is provided with a plurality of stirring shafts 1030 on at least one axial end surface.

[0063] Referring to Figure 3 , Figure 4 , Figure 7 and Figure 8 , in order to prevent blockage when the worm 720 rotates to discharge, the rotating shaft 1010 is rotatably installed on the inner wall of the hopper 730. The outer circumferential surface of the rotating shaft 1010 is fixedly installed with the stirring gear 1020 in transmission with the worm 720. The worm 720 rotates to drive the stirring gear 1020 to rotate. A plurality of stirring shafts 1030 are installed on the axial end surface of the stirring gear 1020. The stirring shafts 1030 are uniformly distributed about the axis of the stirring gear 1020.

[0064] The fixed frame 100 is fixedly installed with a position sensor 1100. The position sensor 1100 is located at the moving path position of the rack 810.

[0065] Referring to Figure 3 , Figure 4 , in order to move the cover structure 840 and the transmission block 640 to the predetermined position by the rack 810, two position sensors 1100 are installed on the fixed frame 100, which are referred to as the first sensor and the second sensor. The first sensor is used to detect whether the cover structure 840 reaches the discharge port position of the shell 710. The second sensor position sensor 1100 is used to detect whether the transmission block 640 reaches the transmission groove 721 to achieve clamping.

[0066] When the rack 810 moves to touch the first touch sensor, it is determined that the material cover structure 840 reaches the position of the material outlet of the shell 710 at this time, and the transmission block 640 moves from the transmission groove 721 to the outside at this time; when the rack 810 moves to touch the second touch sensor, it can be determined that the transmission block 640 moves into the transmission groove 721 at this time, and the material cover structure 840 moves to the side of the material outlet of the shell 710 at this time, thereby releasing the closure of the material outlet of the shell 710.

[0067] For example, the position sensor 1100 can be a travel switch or other equivalent switch, which is not specifically limited here.

[0068] The embodiment also provides a powder rationing and dispensing device, which comprises the powder rationing and dispensing apparatus described above.

[0069] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement to part of the technical features, and any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A powder dispensing device, characterized in that, include: Fixture (100); A first drive assembly (200) is fixedly mounted on the mounting bracket (100); A first driven gear (300) is connected to the first drive assembly (200) for transmission, and the first drive assembly (200) is capable of driving the first driven gear (300) to rotate; A grid structure (400) is fixedly disposed on one side of the first driven gear (300), and the grid structure (400) rotates with the first driven gear (300); A photoelectric sensor (500) is fixedly mounted on the fixing frame (100). The photoelectric sensor (500) is located on the rotation trajectory of the grid structure (400). The photoelectric sensor (500) is used to detect the rotation angle of the grid structure (400). A transmission assembly (600) is connected to the first driven gear (300) and the first driven gear (300) can be driven by the transmission assembly (600); A quantitative feeding assembly (700) is fixedly installed on the fixed frame (100) and is connected to the transmission assembly (600) for transmission.

2. The powder metering device according to claim 1, characterized in that: The first drive assembly (200) includes a first rotary drive member (210) fixedly mounted on the fixed frame (100). A first drive gear (220) is fixedly mounted on the power output end of the first rotary drive member (210). The first drive gear (220) meshes with the first driven gear (300) for transmission.

3. The powder metering device according to claim 1, characterized in that: The grid structure (400) includes a rotating plate (410) fixedly connected to the first driven gear (300). The outer peripheral surface of the rotating plate (410) is provided with a plurality of radially outwardly extending protrusions (420), and a grid (430) is defined between two adjacent protrusions (420).

4. The powder dispensing device according to claim 1, characterized in that: The quantitative feeding assembly (700) includes a housing (710) fixedly installed on the fixed frame (100). The housing (710) has a discharge port and a feed port. A worm gear (720) is provided inside the housing (710). A transmission groove (721) is opened on the end face of the worm gear (720) opposite to the direction of the discharge port. A hopper (730) is fixedly provided at the feed port position. The hopper (730) is in communication with the inside of the housing (710).

5. A powder dispensing device according to claim 4, characterized in that: It also includes a sealing assembly (800) slidably mounted on the fixed frame (100), the sealing assembly (800) including a rack (810) slidably mounted on the fixed frame (100), the end of the rack (810) facing the discharge port of the housing (710) is provided with a first mounting bracket (820), the end of the rack (810) away from the first mounting bracket (820) is provided with a second mounting bracket (830), the first mounting bracket (820) is detachably mounted with a material cover structure (840), the material cover structure (840) moves with the rack (810).

6. A powder dispensing device according to claim 5, characterized in that: The first mounting bracket (820) is provided with a slot (821), and the material cover structure (840) includes a hollow sleeve (841). A locking block (844) is provided at the end of the sleeve (841) facing the first mounting bracket (820). The locking block (844) is inserted into the slot (821) to achieve locking. A sealing plate (842) is provided at the end of the sleeve (841) away from the first mounting bracket (820) to close its end. A discharge pipe (843) communicating with the inside of the sleeve (841) is provided on the outer wall of the sleeve (841).

7. A powder dispensing device according to claim 5, characterized in that: A second drive assembly (900) for driving the rack (810) to move is fixedly installed on the fixed frame (100). The second drive assembly (900) includes a second rotary drive member (910) fixedly installed on the fixed frame (100). A second drive gear (920) is installed at the power output end of the second rotary drive member (910). The second drive gear (920) meshes with the rack (810).

8. A powder dispensing device according to claim 5, characterized in that: The transmission assembly (600) includes a second driven gear (610) rotatably mounted on a bracket on one side of the fixed frame (100). The second driven gear (610) has a transmission hole (620) at its axial center position. A transmission shaft (630) is slidably driven in the transmission hole (620). The transmission shaft (630) is rotatably mounted on the second mounting bracket (830). A transmission block (640) is provided at the end of the transmission shaft (630) away from the second driven gear (610). A position sensor (1100) is fixedly installed on the fixed frame (100), and the position sensor (1100) is located at the position of the moving path of the rack (810).

9. A powder metering device according to claim 4, characterized in that: The hopper (730) is equipped with a stirring assembly (1000) that is connected to the worm gear (720) for transmission. The stirring assembly (1000) is rotatably installed inside the hopper (730). The hopper (730) includes a rotating shaft (1010) that is rotatably installed on the inner wall of the hopper (730). A stirring gear (1020) is fixedly installed on the rotating shaft (1010). The stirring gear (1020) meshes with the worm gear (720) for transmission. At least one axial end face of the stirring gear (1020) is provided with a plurality of stirring shafts (1030).

10. A powder quantitative dispensing device, characterized in that: Includes the powder dispensing device according to any one of claims 1 to 9.

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