Planetary mixer with anti-sticking wall scraping device

Abstract

The utility model provides a kind of wall scraping device's planetary mixer with anti-sticking, it is related to mixer technical field, including control box, the top of control box is equipped with power component, the middle of control box and power component is equipped with lifting assembly, the bottom surface of power component is equipped with stirring frame body, adopt planetary wheel bottom stirring shaft under compound motion to the material in bucket is multidirectional overturning, shearing and mixing, realize fast, uniform stirring.Inside tooth ring is fixed in stirring frame body inner wall, with planetary wheel meshing to ensure that transmission ratio is stable and movement is coordinated.Planetary carrier rotates synchronously with planetary wheel under support, drive support and first scraper to rotate and scrape attached material along barrel wall, prevent accumulation.At the same time, sun gear drives bottom sleeve to rotate, the second scraper of sleeve bottom surface is attached to barrel bottom and is scraped to clean, so that bottom material is not left over.By the synergistic effect of barrel wall scraper and bottom scraper, the shortcomings that the bottom wall of the stirring barrel cannot be scraped in the prior art are solved.

Description

Technical Field

[0001] This utility model relates to the field of mixer technology, and in particular to a planetary mixer equipped with an anti-sticking and scraping device. Background Technology

[0002] According to Chinese Publication No. CN212215347U, a vacuum planetary mixer for uniform stirring includes a main body and a base. A stirring frame is disposed on the outer side of the bottom of the main body, and stirring blades are installed on the outer side of the bottom of the main body. A barrel is disposed on the outer side of the bottom of the stirring blades, and a fastening device is disposed on the outer side of the barrel. An auxiliary device is installed on the outer side of the bottom of the fastening device. A power assembly is disposed on the outer side of the rear end of the stirring frame, and a control box is installed on the outer side of the bottom of the power assembly. This vacuum planetary mixer for uniform stirring, through the arrangement of the fastening device, fastening plate, connecting plate, and limiting hole, can clamp the barrel to a certain extent after the barrel is placed, using the interaction of the fastening plate and connecting plate, to avoid instability and wobbling during stirring, thus providing greater stability. Two fastening devices are provided, and the structure is simple, making it easy for the user to operate the entire fastening device.

[0003] The scrapers of the planetary mixers mentioned above and in the prior art are mostly arranged on the inner circumference of the barrel. Their scraping path is mainly concentrated in the vertical or inclined area of ​​the barrel wall, which cannot scrape the bottom wall of the mixing barrel. As a result, the residual material at the bottom cannot be scraped off in time or re-rolled into the mixing flow field, leading to problems such as material accumulation, uneven heating and local adhesion. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies that cannot scrape the bottom wall of the mixing tank, and to propose a planetary mixer equipped with an anti-sticking scraping device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a planetary mixer with an anti-sticking and scraping device, comprising a control box, a power component at the top of the control box, a lifting component between the control box and the power component, a stirring frame at the bottom of the power component, a stirring tank at the bottom of the stirring frame, an internal gear ring inside the stirring frame, a planetary carrier inside the internal gear ring, a sun gear at the bottom of the planetary carrier, planetary gears outside the sun gear, a main shaft at the bottom of the sun gear, and stirring shafts at the bottom of each of the three planetary gears. A bracket is provided on one side of the main shaft, a first scraper is provided on the surface of the bracket, a sleeve is provided at the bottom of the main shaft, three second scrapers are provided on the outer surface of the bottom end of the sleeve, and two movable grooves are provided on the outer surface of the top end of the sleeve. A return spring is provided inside the sleeve, and a fixing bolt is provided inside the movable groove.

[0006] Preferably, the lifting end of the lifting component is connected to the bottom surface of the power component, and the other end of the lifting component is connected to the control box, and the stirring frame is installed on the bottom surface of the power component away from the lifting component.

[0007] Preferably, the internal gear ring is installed inside the stirring frame and bolted to the stirring frame. The sun gear is installed in the middle of the internal gear ring, and a planetary gear array is arranged on the outer surface of the sun gear. The planetary gears mesh with the internal gear ring and the sun gear.

[0008] Preferably, the top of the sun gear is splined to the output end of the power assembly, and the bottom of the sun gear is splined to the main shaft; the top of the planetary gears is shaft-connected to the planet carrier, and the bottom of each planetary gear is splined to the stirring shaft.

[0009] Preferably, the bracket is installed on the edge of the bottom surface of the planetary carrier, and the top of the bracket is bolted to the bottom surface of the planetary carrier. The first scraper is installed on the surface of the bracket and bolted to the bracket.

[0010] Preferably, the two movable grooves on the top surface of the sleeve are mirror images of the sleeve, the bottom end of the spindle is installed inside the sleeve and compresses the return spring, the spindle passes through the two movable grooves, and the sleeve is connected to the bottom end of the spindle by a fixing bolt.

[0011] Preferably, the three second scrapers on the outer surface of the sleeve are arranged in a circumferential array at the bottom end of the sleeve, and the second scrapers are all welded to the sleeve.

[0012] Beneficial effects In this invention, a control box drives a lifting assembly to lower the power assembly, allowing the mixing frame, mixing shaft, main shaft, and scraper to enter the mixing tank and begin operation. As the main shaft continues to descend, the second scraper contacts the bottom of the tank, while the outer edge of the first scraper makes close contact with the tank wall. When the power assembly is activated, the sun gear rotates, driving multiple planetary gears to rotate and revolve simultaneously. The mixing shaft at the bottom of the planetary gears, under this combined motion, performs multi-directional tumbling, shearing, and mixing of the material inside the tank, achieving rapid and uniform mixing. The internal gear ring is fixed to the inner wall of the mixing frame and meshes with the planetary gears to ensure stable transmission ratio and coordinated movement. The planetary carrier, supported by the planetary gears, rotates synchronously with them, driving the support and the first scraper to rotate along the tank wall and scrape away adhering material, preventing accumulation. Simultaneously, the sun gear drives the bottom sleeve to rotate, and the second scraper on the bottom surface of the sleeve scrapes and cleans the bottom of the tank, ensuring no material residue remains. Through the synergistic action of the tank wall scraper and the bottom scraper, the shortcomings of existing technologies in scraping the bottom wall of the mixing tank are overcome. Attached Figure Description

[0013] Figure 1 This is an isometric drawing of the present invention; Figure 2 This is the right view of the present invention; Figure 3 For the present utility model Figure 2 Sectional view at point AA; Figure 4 This is a partial isometric drawing of the present invention; Figure 5 This is a partial perspective view of the present invention; Figure 6 This is a partial right view of the present invention; Figure 7 For the present utility model Figure 6 Sectional view at BB.

[0014] Legend: 1. Control box; 2. Lifting assembly; 3. Power assembly; 4. Mixing frame; 5. Mixing tank; 6. Internal gear ring; 7. Planetary carrier; 8. Sun gear; 9. Planetary gears; 10. Mixing shaft; 11. Bracket; 12. First scraper; 13. Main shaft; 14. Sleeve; 15. Movable groove; 16. Second scraper; 17. Return spring; 18. Fixing bolt. Detailed Implementation

[0015] To make the technical means, creative features, and achieved objectives and effects of this utility model easier to understand, the present utility model is further described below with reference to specific embodiments and accompanying drawings. However, the following embodiments are merely preferred embodiments of this utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described in the implementation plan without creative effort are all within the protection scope of this utility model.

[0016] The specific embodiments of this utility model are described below with reference to the accompanying drawings. Specific Implementation Example 1: Reference Figure 1-7A planetary mixer equipped with an anti-sticking and wall-scraping device includes a control box 1, a power assembly 3 on the top of the control box 1, a lifting assembly 2 between the control box 1 and the power assembly 3, a mixing frame 4 on the bottom of the power assembly 3, a mixing tank 5 at the bottom of the mixing frame 4, an internal gear ring 6 inside the mixing frame 4, a planetary carrier 7 inside the internal gear ring 6, a sun gear 8 at the bottom of the planetary carrier 7, planetary gears 9 outside the sun gear 8, a main shaft 13 on the bottom of the sun gear 8, and a mixing shaft 10 on the bottom of each of the three planetary gears 9. A bracket 11 is provided on one side of the shaft 13. A first scraper 12 is provided on the surface of the bracket 11. A sleeve 14 is provided at the bottom of the main shaft 13. Three second scrapers 16 are provided on the outer surface of the bottom end of the sleeve 14, and two movable grooves 15 are provided on the outer surface of the top end of the sleeve 14. A return spring 17 is provided inside the sleeve 14, and a fixing bolt 18 is provided inside the movable groove 15. The lifting end of the lifting assembly 2 is connected to the bottom surface of the power assembly 3, and the other end of the lifting assembly 2 is connected to the control box 1. The stirring frame 4 is installed on the bottom surface of the power assembly 3 at the end away from the lifting assembly 2. The internal gear ring 6 is installed... The internal gear ring 6 is bolted to the stirring frame 4 and installed inside the stirring frame 4. The sun gear 8 is installed in the middle of the internal gear ring 6, and the planet gears 9 are arranged in a circular array on the outer surface of the sun gear 8. The planet gears 9 mesh with the internal gear ring 6 and the sun gear 8. The top of the sun gear 8 is splined to the output end of the power component 3, and the bottom of the sun gear 8 is splined to the main shaft 13. The top of the planet gears 9 is shafted to the planet carrier 7, and the bottom of each planet gear 9 is splined to the stirring shaft 10. The bracket 11 is installed on the bottom edge of the planet carrier 7, and the top of the bracket 11 is connected to the planetary carrier 7. The bottom surface of the frame 7 is bolted together. The first scraper 12 is installed on the surface of the bracket 11 and bolted together with the bracket 11. The two movable grooves 15 on the top surface of the sleeve 14 are mirrored with the sleeve 14 as the center. The bottom end of the main shaft 13 is installed into the inside of the sleeve 14 and squeezes the return spring 17. The main shaft 13 passes through the two movable grooves 15. The sleeve 14 is connected to the bottom end of the main shaft 13 by a fixing bolt 18. The three second scrapers 16 on the outer surface of the sleeve 14 are arranged in a circumferential array at the bottom end of the sleeve 14. The second scrapers 16 are all welded to the sleeve 14.

[0018] Control box 1 serves as the central control unit of the entire machine, housing a power module, a variable frequency speed control module, a lifting control circuit, and a safety protection system. Operators input start, stop, lifting, and speed parameters via a human-machine interface. Control box 1 transmits command signals to lifting assembly 2 and power assembly 3. Lifting assembly 2 consists of an electric lead screw and a guide rod, with its output end fixedly connected to the bottom of power assembly 3. By controlling the forward and reverse rotation of the motor, power assembly 3 can smoothly lift and lower vertically. The guide rod limits its sway, ensuring the coaxiality of the mixing frame 4 during lifting. The motor inside power assembly 3 is a servo motor, connected to the input end of a reducer via a coupling. The motor speed is reduced by the reducer, resulting in high torque and low-speed rotation. The output shaft is splined to the top of the sun gear 8 to achieve torque transmission. The coupling absorbs minor deviations and vibrations, making power transmission smoother. The sun gear 8, as the central component of the transmission system, meshes with the external teeth of the three planet gears 9. During rotation, it simultaneously drives the planet gears 9 to rotate and propels the planet carrier 7 to rotate. The bottom of the sun gear 8 is connected to the main shaft 13 via a spline, ensuring continuous power transmission from top to bottom. The internal gear ring 6 is fixedly installed inside the stirring frame 4, forming a fixed ring body by bolts. Its internal teeth mesh with the external teeth of the planet gears 9, serving both a transmission constraint function and a reverse action on the planet gears 9 to maintain the force balance of the planetary gear system. The planet carrier 7 is installed around the sun gear 8 and supported relative to the stirring frame 4 by bearings. The rotation of the planet carrier 7 is driven by the meshing of the planet gears 9 and the sun gear 8. The planet carrier 7 rotates synchronously with the support 11 below as it revolves around the sun gear. The top of the planet gears 9 has a shaft that fits into the planet carrier 7 and is supported by needle roller bearings to reduce friction. During operation, the bearings bear the radial component of the force from the sun gear 8 and the internal gear ring 6, as well as the axial load generated by the stirring resistance, ensuring the rotational stability of the planet gears 9. The bottom end of the planetary gear 9 is connected to the stirring shaft 10 via a spline. The spline structure enables precise torque transmission and prevents relative slippage. The lower end of the stirring shaft 10 extends into the mixing tank 5, where stirring blades are installed. Under the combined action of the rotation of the planetary gear 9 and the revolution of the planetary carrier 7, the stirring shaft 10 forms a composite motion trajectory in space, achieving three-dimensional tumbling and shearing mixing of the materials. The bracket 11 is installed on the bottom edge of the planetary carrier 7 and is securely fixed by bolts. As the planetary carrier 7 rotates, the bracket 11 drives the first scraper 12 mounted on its surface to move along the inner wall of the mixing tank 5. The first scraper 12 is made of wear-resistant elastic material, and its outer edge has a preset elastic contact angle. When it rotates to the tank wall, it maintains a constant contact pressure through flexible deformation, achieving continuous scraping and anti-sticking of the tank wall. The main shaft 13 is splined to the bottom of the sun gear 8. The main shaft 13 rotates and transmits power downward under the drive of the power assembly 3. Its bottom end is inserted into the sleeve 14 to form a coaxial connection. The outer surface of the top end of the sleeve 14 is provided with two centrally symmetrical movable grooves 15. The movable grooves 15 are embedded with fixing bolts 18 to limit the maximum stroke of the sleeve 14 in the axial position of the main shaft 13.A return spring 17 is installed inside the sleeve 14. When the main shaft 13 moves downward, the return spring 17 is compressed to generate a preload force, ensuring that the sleeve 14 maintains elastic pressure against the bottom wall of the mixing tank 5, thereby ensuring effective scraping by the second scraper 16. Three second scrapers 16 are evenly welded to the outer surface of the bottom end of the sleeve 14. The second scrapers 16 are equidistant along the circumference. When the main shaft 13 drives the sun gear 8 to rotate, the sleeve 14 rotates synchronously, and the second scrapers 16 continuously scrape against the bottom wall of the mixing tank 5. The scrapers form a sliding contact surface with the bottom of the tank, which can thoroughly remove deposited materials and prevent bottom accumulation and heating dead zones. The fixing bolt 18 is inserted into the movable groove 15 and connected to the bottom end of the main shaft 13 to achieve axial limiting and locking anti-dislodgement functions of the sleeve 14, ensuring that the sleeve 14 will not fall off when subjected to reverse impact. The elastic force of the return spring 17 automatically adjusts the contact force through the compression state between the main shaft 13 and the sleeve 14. When there is slight deformation at the bottom of the bucket or changes in stirring resistance, the spring elasticity can absorb the impact and restore the original position. Specific Implementation Example 2: Reference Figure 1-7A planetary mixer equipped with an anti-sticking and wall-scraping device is further based on the basic structure in Specific Embodiment 1. When the operator inputs start and lifting commands through the control box 1, the power module in the control box supplies power to the lifting assembly 2 and the power assembly 3. The lifting control circuit starts the electric lead screw to rotate, causing the power assembly 3 connected to its output end to move vertically downward along the direction of the guide rod. The guide rod provides linear constraint throughout the process, preventing the power assembly 3 from swaying and ensuring that the mixing frame 4 and the mixing tank 5 remain coaxial. When the power assembly 3 descends to the set position, the main shaft 13, the mixing shaft 10, and the first scraper 12 and the second scraper 16 are respectively inserted into the mixing tank 5, wherein the first scraper 12 is in contact with the tank wall, and the second scraper 16 is in contact with the bottom of the tank. After the power assembly 3 is started, the internal servo motor runs and outputs a low-speed, high-torque rotational force through the reducer. The rotational force is transmitted to the top spline of the sun gear 8 through the coupling, causing the sun gear 8 to start rotating. Driven by the sun gear 8, the planetary gears 9 revolve around the sun gear 8 and rotate on their own axes. Since the internal gear ring 6 on the outer side of the planetary gear 9 is fixedly installed on the stirring frame 4 and does not rotate with it, the rotation of the sun gear 8 is constrained in the opposite direction by the internal gear ring 6, thus forming a stable transmission ratio. The top of the planetary gear 9 is mounted in the planet carrier 7 through a shaft connection. As the planetary gear 9 moves in the meshing state, the planet carrier 7 is driven to rotate as a whole by the revolution of the planetary gear 9, realizing the combined motion output of revolution and rotation. In this process, the power is transmitted outward through the path of the sun gear 8, planetary gear 9, and planet carrier 7, and is also transmitted to the main shaft 13 through the spline at the bottom of the sun gear 8. The main shaft 13 rotates synchronously with the sun gear 8 and further drives the sleeve 14 to rotate downward. Since the main shaft 13 and the sleeve 14 are limited by the fixing bolt 18 and elastically pre-tightened by the return spring 17, the sleeve 14 maintains axial floating while rotating. When the main shaft 13 descends, the return spring 17 is compressed and stores energy, so that the three second scrapers 16 at the bottom of the sleeve 14 are pressed tightly against the bottom wall of the stirring tank 5 with constant elastic force, thus continuously scraping during rotation. The spring force of the return spring 17 can be automatically adjusted according to the slight deformation of the bottom wall, ensuring stable contact between the second scraper 16 and the bottom of the barrel without excessive wear. Simultaneously, the stirring shaft 10 at the bottom of the planetary gear 9 rotates, and its stirring blades tumble and shear the material in multiple directions, resulting in efficient mixing in a short time. The planetary carrier 7 rotates synchronously with the revolution of the planetary gear 9, and the support 11 mounted on its bottom surface also rotates accordingly. The support 11 drives the first scraper 12 to move in a circular motion along the inner wall of the mixing barrel 5. The outer edge of the first scraper 12 has an elastic contact structure, which maintains a constant contact pressure with the barrel wall through flexible deformation during rotation, continuously scraping the barrel wall and preventing material adhesion and accumulation, achieving an anti-sticking effect.

[0020] In summary: 1. The control box 1 drives the lifting assembly 2, which in turn lowers the power assembly 3, allowing the mixing frame 4, mixing shaft 10, main shaft 13, and scraper to enter the mixing tank 5 and enter the working state. As the main shaft 13 continues to descend, the second scraper 16 comes into contact with the bottom of the tank, and the outer edge of the first scraper 12 is in close contact with the tank wall. When the power assembly 3 is activated, the sun gear 8 rotates, driving multiple planetary gears 9 to rotate and revolve simultaneously. The mixing shaft 10 at the bottom of the planetary gears 9 performs multi-directional tumbling, shearing, and mixing of the material in the tank under the combined motion, achieving rapid and uniform mixing. The internal gear ring 6 is fixed to the inner wall of the mixing frame 4 and meshes with the planetary gears 9 to ensure stable transmission ratio and coordinated movement. The planetary carrier 7 rotates synchronously with the planetary gears 9 under support, driving the support 11 and the first scraper 12 to rotate along the tank wall to scrape off the attached material and prevent accumulation. At the same time, the sun gear 8 drives the bottom sleeve 14 to rotate, and the second scraper 16 on the bottom surface of the sleeve 14 comes into contact with the bottom of the tank to scrape and clean, ensuring no material remains at the bottom. By combining the scrapers on the tank wall and the scraper at the bottom, the drawback of existing technologies that cannot scrape the bottom wall of the mixing tank is solved.

[0021] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0022] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A planetary mixer equipped with an anti-sticking and wall-scraping device, comprising a control box (1), characterized in that: The top of the control box (1) is provided with a power assembly (3), and a lifting assembly (2) is provided between the control box (1) and the power assembly (3). The bottom surface of the power assembly (3) is provided with a stirring frame (4), and the bottom of the stirring frame (4) is provided with a stirring tank (5). The inside of the stirring frame (4) is provided with an internal gear ring (6), and the inside of the internal gear ring (6) is provided with a planetary carrier (7). The bottom of the planetary carrier (7) is provided with a sun gear (8), and the outside of the sun gear (8) is provided with planetary gears (9). The bottom surface of the sun gear (8) is provided with... It has a main shaft (13) and a stirring shaft (10) on the bottom surface of each of the three planetary gears (9). A bracket (11) is provided on one side of the main shaft (13). A first scraper (12) is provided on the surface of the bracket (11). A sleeve (14) is provided at the bottom of the main shaft (13). Three second scrapers (16) are provided on the outer surface of the bottom end of the sleeve (14). Two movable grooves (15) are provided on the outer surface of the top end of the sleeve (14). A return spring (17) is provided inside the sleeve (14). A fixing bolt (18) is provided inside the movable groove (15).

2. A planetary mixer with an anti-sticking and scraping device according to claim 1, characterized in that: The lifting end of the lifting component (2) is connected to the bottom surface of the power component (3), and the other end of the lifting component (2) is connected to the control box (1). The stirring frame (4) is installed on the bottom surface of the power component (3) away from the lifting component (2).

3. A planetary mixer with an anti-sticking and scraping device according to claim 1, characterized in that: The internal gear ring (6) is installed inside the stirring frame (4) and is bolted to the stirring frame (4). The sun gear (8) is installed in the middle position of the internal gear ring (6) and the planet gears (9) are arranged in a circumferential array on the outer surface of the sun gear (8). The planet gears (9) mesh with the internal gear ring (6) and the sun gear (8).

4. A planetary mixer with an anti-sticking and scraping device according to claim 1, characterized in that: The top of the sun gear (8) is splined to the output end of the power assembly (3), and the bottom of the sun gear (8) is splined to the main shaft (13). The top of the planet gear (9) is axially connected to the planet carrier (7), and the bottom of the planet gear (9) is splined to the stirring shaft (10).

5. A planetary mixer with an anti-sticking and scraping device according to claim 1, characterized in that: The bracket (11) is installed on the bottom edge of the planetary carrier (7), and the top of the bracket (11) is bolted to the bottom of the planetary carrier (7). The first scraper (12) is installed on the surface of the bracket (11), and the first scraper (12) is bolted to the bracket (11).

6. A planetary mixer with an anti-sticking and scraping device according to claim 1, characterized in that: The two movable grooves (15) on the top surface of the sleeve (14) are mirror images of the sleeve (14). The bottom end of the main shaft (13) is installed inside the sleeve (14) and presses the return spring (17). The main shaft (13) passes through the two movable grooves (15), and the sleeve (14) is connected to the bottom end of the main shaft (13) by a fixing bolt (18).

7. A planetary mixer with an anti-sticking and scraping device according to claim 1, characterized in that: The three second scrapers (16) on the outer surface of the sleeve (14) are arranged in a circumferential array at the bottom end of the sleeve (14), and the second scrapers (16) are all welded to the sleeve (14).

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