A low-load scraping structure and stirring device

Abstract

This utility model belongs to the technical field of mixing equipment, specifically disclosing a low-load scraping edge structure and mixing device, including a scraping edge seat, a connecting rod, a mounting plate, a scraper, and a material cylinder. The top end of the connecting rod is connected to the scraping edge seat, and the bottom end of the connecting rod is connected and fixed to the mounting plate through a connecting block. The scraper is placed vertically and is fixed to the surface of the mounting plate by fasteners, so that the edge of the scraper away from the mounting plate contacts the inner wall of the material cylinder. The angle between the plane formed by the edge of the scraper away from the mounting plate and the center line of the material cylinder and the surface of the scraper is between 75-90°. On the one hand, it plays a buffering role, and on the other hand, it makes the scraper tend to scrape the material along the circumferential tangent of the material cylinder. This reduces the area of ​​contact between the scraper and the material during the movement, that is, it reduces the resistance zone in front of the scraper, thereby reducing resistance. In these two ways, damage to the scraper and the connecting rod is avoided.

Description

Technical Field

[0001] This utility model relates to the field of mixing equipment technology, and in particular to a low-load scraping structure and mixing device. Background Technology

[0002] In various mixers, materials (such as adhesives) are stored in a mixing tank and stirred. Since the materials tend to adhere to the inner wall of the tank, a scraper on a scraper is commonly used to scrape the material off the inner wall to ensure that the materials are mixed evenly. The scraper is mounted on a planetary carrier, and the motor drives the planetary carrier to rotate, so the scraper rotates with the planetary carrier, scraping the material off the inner wall of the tank.

[0003] The materials being mixed vary; some are thinner and easier to scrape, while others are very viscous and difficult to scrape. Because the materials are viscous and have strong adhesive properties, a lot of the material adheres and remains between the inner wall of the material cylinder and the scraper. Currently, scrapers on the market have scrapers placed radially along the inner wall of the material cylinder, as shown in the attached image. Figure 1-2 As shown, this creates a large resistance zone in front of the scraper. The material remaining in this resistance zone will exert strong resistance on the scraper, which can easily damage the scraper, connecting rod, and planetary carrier. Utility Model Content

[0004] In order to overcome the defects of the existing technology, this utility model provides a low-load scraping structure and a stirring device.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a low-load scraping structure, including a scraping seat, a connecting rod, a mounting plate, a scraper and a material cylinder. The top end of the connecting rod is connected to the scraping seat, and the bottom end of the connecting rod is connected and fixed to the mounting plate through a connecting block. The scraper is placed vertically and is fixed to the surface of the mounting plate by fasteners so that the edge of the scraper away from the mounting plate contacts the inner wall of the material cylinder. The angle between the plane formed by the edge of the scraper away from the mounting plate and the center line of the material cylinder and the surface of the scraper is between 75-90°.

[0006] As a further embodiment, the surface of the mounting plate is parallel to the surface of the scraper, and the angle between the surface of the mounting plate and the plane is between 75° and 90°.

[0007] As a further embodiment, the end of the scraper near the inner wall of the material cylinder is formed with a drag-reducing inclined surface, and the angle between the drag-reducing inclined surface and the plane is between 25° and 45°.

[0008] This utility model also provides a stirring device, including the aforementioned low-load scraping structure. The stirring device further includes a frame, a servo motor, a planetary gearbox, a rotating shaft, and a stirring paddle. The servo motor and the planetary gearbox are both mounted on the top of the frame. The material cylinder is placed inside the frame and located below the planetary gearbox. The servo motor is driven by the sun gear shaft at the input end of the planetary gearbox. The top end of the rotating shaft is driven by one of the planetary gears in the planetary gearbox. The bottom end of the rotating shaft is connected and fixed to the scraping seat. The stirring paddle is driven by the other planetary gear in the planetary gearbox.

[0009] The beneficial effects of this utility model are as follows: the angle between the plane formed by the edge of the scraper away from the mounting plate and the center line of the material cylinder and the scraper surface is between 75-90°, which means that the scraper surface is as perpendicular as possible to the radial direction of the material cylinder. On the one hand, this makes the force when the scraper contacts the inner wall of the material cylinder tend to be perpendicular to the scraper surface. Compared with the force tending to be parallel to the scraper surface, the plate thickness is smaller than the width of the plate surface, and the scraper is easier to deform, which plays a buffering role. On the other hand, it makes the scraper tend to scrape the material along the circumferential tangent of the material cylinder. This reduces the area of ​​the scraper interacting with the material during the movement, that is, reduces the resistance zone in front of the scraper, thereby reducing resistance and lowering the load. These two aspects prevent damage to the scraper and connecting rod. Attached Figure Description

[0010] Figure 1 This is a front sectional view of the prior art;

[0011] Figure 2 A top view of the prior art;

[0012] Figure 3 This is a front sectional view of Embodiment 1 of the present invention;

[0013] Figure 4 This is a top view of Embodiment 1 of the present invention;

[0014] Figure 5 for Figure 4 Enlarged view of point B in the image;

[0015] Figure 6 This is a structural schematic diagram of Embodiment 2 of the present invention.

[0016] In the figure, 1-scraper seat, 2-connecting rod, 3-mounting plate, 31-connecting block, 4-scraper, 41-drag reduction slope, 5-material cylinder, 6-fastener, 7-frame, 8-servo motor, 9-planetary gearbox, 10-rotating shaft, 11-mixing paddle, 12-resistance zone. Detailed Implementation

[0017] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0018] Example 1

[0019] This embodiment provides a low-load scraping structure, including a scraping seat 1, a connecting rod 2, a mounting plate 3, a scraper 4, and a material cylinder 5. The top end of the connecting rod 2 is connected and fixed to the scraping seat 1, and the bottom end of the connecting rod 2 is connected and fixed to the mounting plate 3 through a connecting block 31, thereby fixing the mounting plate 3. The scraper 4 is placed vertically and is fixed to the surface of the mounting plate 3 by fasteners 6. The fasteners 6 can be screws, so that the scraper 4 is away from the edge of the mounting plate 3 and contacts the inner wall of the material cylinder 5, so that the scraper 4 can scrape the material adhering to the inner wall of the material cylinder 5.

[0020] The angle α between the plane formed by the edge of the scraper 4 away from the mounting plate 3 and the center line of the material cylinder 5 and the surface of the scraper 4 is between 75-90°. This means that the surface of the scraper 4 is as perpendicular as possible to the radial direction of the material cylinder 5. On the one hand, this makes the force when the scraper 4 contacts the inner wall of the material cylinder 5 tend to be perpendicular to the surface of the scraper 4. Compared with the force tending to be parallel to the surface of the scraper 4, the thickness of the plate is smaller than the width of the plate surface, and the scraper 4 is easier to deform, which plays a buffering role. On the other hand, it makes the scraper 4 tend to scrape the material along the circumferential tangent of the material cylinder 5. This reduces the area of ​​the scraper 4 interacting with the material during the movement, that is, reduces the resistance zone 12 in front of the scraper 4, thereby reducing resistance and lowering the load. These two aspects prevent damage to the scraper 4 and the connecting rod 2.

[0021] As a further improvement, the surface of the mounting plate 3 is parallel to the surface of the scraper 4, and the included angle β between the surface of the mounting plate 3 and the plane is between 75-90°. The mounting plate 3 is fixed on the connecting block 31. Similarly, the mounting plate 3 is aligned with the scraper 4 to reduce the area of ​​the mounting plate 3 interacting with the material during the movement, thereby reducing resistance.

[0022] In some embodiments, the end of the scraper 4 near the inner wall of the material cylinder 5 is formed with a drag-reducing slope 41, and the angle θ between the drag-reducing slope 41 and the plane is between 25° and 45°. The drag-reducing slope 41 can reduce the area of ​​interaction with the material, thereby reducing resistance; on the other hand, the drag-reducing slope 41 plays a guiding role, guiding the material away from the scraper 4 and reducing resistance.

[0023] Example 2

[0024] This embodiment provides a stirring device, including a low-load scraping structure as described in Embodiment 1 above. The stirring device further includes a frame 7, a servo motor 8, a planetary gearbox 9, a rotating shaft 10, and a stirring paddle 11. The servo motor 8 and the planetary gearbox 9 are both mounted on top of the frame 7. The material cylinder 5 is placed inside the frame 7 and located below the planetary gearbox 9. The servo motor 8 is driven by the sun gear shaft at the input end of the planetary gearbox 9. The top end of the rotating shaft 10 is driven by one of the planetary gears in the planetary gearbox 9, and the bottom end of the rotating shaft 10 is connected and fixed to the scraping seat 1. The stirring paddle 11 is driven by the other planetary gear in the planetary gearbox 9. The servo motor 8 drives the planetary gearbox 9 to rotate, thereby causing the scraper 4 to rotate along the inner wall of the material cylinder 5, scraping up the adhered material, and driving the stirring paddle 11 to stir.

[0025] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.

Claims

1. A low-load scraping structure, comprising a scraping seat (1), a connecting rod (2), a mounting plate (3), a scraper (4), and a material cylinder (5), wherein the top end of the connecting rod (2) is connected to the scraping seat (1), and the bottom end of the connecting rod (2) is connected and fixed to the mounting plate (3) via a connecting block (31), characterized in that: The scraper (4) is placed vertically and is fixed to the surface of the mounting plate (3) by fasteners (6) so that the scraper (4) away from the edge of the mounting plate (3) contacts the inner wall of the material cylinder (5). The angle between the plane formed by the scraper (4) away from the edge of the mounting plate (3) and the center line of the material cylinder (5) and the surface of the scraper (4) is between 75-90°.

2. The low-load scraping structure according to claim 1, characterized in that: The surface of the mounting plate (3) is parallel to the surface of the scraper (4), and the angle between the surface of the mounting plate (3) and the plane is between 75° and 90°.

3. The low-load scraping structure according to claim 1, characterized in that: The scraper (4) has a drag-reducing inclined surface (41) formed at the end near the inner wall of the material cylinder (5), and the angle between the drag-reducing inclined surface (41) and the plane is between 25-45°.

4. A stirring device, characterized in that: The stirring device includes a low-load scraping structure as described in any one of claims 1-3, and further includes a frame (7), a servo motor (8), a planetary gearbox (9), a rotating shaft (10), and a stirring paddle (11). The servo motor (8) and the planetary gearbox (9) are both mounted on the top of the frame (7). The material cylinder (5) is placed inside the frame (7) and located below the planetary gearbox (9). The servo motor (8) is connected to the sun gear shaft at the input end of the planetary gearbox (9). The top end of the rotating shaft (10) is connected to one of the planetary gears of the planetary gearbox (9). The bottom end of the rotating shaft (10) is connected and fixed to the scraping seat (1). The stirring paddle (11) is connected to the other planetary gear of the planetary gearbox (9).

Images