A split screw head and a split device

Abstract

The application discloses a kind of split screw head and split device, first mounting hole is set in split screw head at the top of split screw, rotating shaft is surrounded in it by the fixed hole of top, and the spacing S between the lower surface of rotating shaft and the bottom surface of first mounting hole, S>0, the space where spacing S is formed forms foreign matter collection area, even if the debris is generated when split screw is fastened and installed, it is also dropped to foreign matter collection area, and will not drop into medicine powder, to reduce the risk of medicine powder pollution.Split device includes split screw head, mounting seat and bunker, rotating shaft of split screw head is rotatably connected on mounting seat and is used for the material in split bunker, since split screw head is connected with mounting seat by rotating shaft, therefore, the screw outer wall of split screw, which is directly contacted with medicine powder, and mounting seat do not form the containing gap space of medicine powder, and the period of split screw disassembly, cleaning and maintenance is longer.

Description

Technical Field

[0001] This invention relates to the field of aseptic powder dispensing technology, and in particular to a dispensing screw head and dispensing device. Background Technology

[0002] Dispensing screws are mainly used for screw-type quantitative dispensing of various powders. They are widely used in the dispensing of medical powders, such as the aseptic production of antibiotics like cephalosporins and penicillins. Due to the differences in the physical properties of the powders and the production requirements for different filling volumes, it is necessary to select a suitable screw for installation according to the formula before production.

[0003] Chinese Patent Publication No. CN203698678U discloses a screw dispensing head, which connects a rotating shaft to a dispensing screw used for quantitative dispensing via a rotating bushing. The applicant discovered the following technical problems with this solution: the screw is joined from bottom to top and fixed with exposed fastening bolts, allowing contaminants from the installation process to fall into the powder and cause contamination. Simultaneously, the fastening bolts also rub against the screw during dispensing, increasing the risk of contaminant generation. Since the rotating bushing covers the outer wall of the dispensing screw, powder may also enter the gap between the screw and the mounting base along the outer wall of the screw during operation. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a dispensing screw head and dispensing device that reduces the risk of powder contamination and is easy to clean and maintain.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A dispensing screw head includes a dispensing screw and a rotating shaft connected to the dispensing screw. The top of the dispensing screw has a first mounting hole, and the lower part of the rotating shaft is inserted into the first mounting hole. There is a gap between the lower surface of the rotating shaft and the bottom surface of the first mounting hole.

[0007] As a further improvement to the above technical solution:

[0008] The lower part of the rotating shaft has a second mounting hole, and the upper outer peripheral wall of the disassembly screw has a third mounting hole. The third mounting hole is corresponding to the second mounting hole and communicates with the first mounting hole. The disassembly screw head also includes a locking member, which is inserted into the second mounting hole to connect the rotating shaft and the disassembly screw.

[0009] The inner wall of the second mounting hole is provided with an internal thread, and the outer peripheral wall of the locking member is provided with an external thread, and the internal thread and the external thread are engaged.

[0010] The inner wall of the first mounting hole is provided with a positioning groove, which is positioned opposite to the third mounting hole. One end of the locking member is engaged in the positioning groove, and the other end is located in the second mounting hole.

[0011] The locking component is a locating pin.

[0012] As a general inventive concept, the present invention also provides a dispensing device, including the aforementioned dispensing screw head, mounting base and hopper, wherein the rotating shaft of the dispensing screw head is rotatably connected to the mounting base and is used for dispensing materials in the hopper.

[0013] As a further improvement to the above technical solution:

[0014] The top of the dispensing screw is provided with a convex ring along the outer circumference of the first mounting hole, and the bottom of the mounting base is provided with a countersunk hole, the countersunk hole and the convex ring being in a concave-convex fit.

[0015] The inner diameter of the convex ring is d1, and the inner diameter of the first mounting hole is d2, satisfying d2 < d1.

[0016] The rotating shaft includes a third mating part, a second mating part, and a first mating part with diameters decreasing sequentially from top to bottom. The first mating part is inserted into a first mounting hole, the second mating part is connected to a convex ring, and the third mating part is connected to the inner hole of the mounting base.

[0017] The mounting base has a slot on its inner wall and a slide rail on its outer wall, which engages with the slot.

[0018] Compared with the prior art, the advantages of the present invention are as follows:

[0019] The dispensing screw head of the present invention has a first mounting hole at the top of the dispensing screw, through which a rotating shaft is surrounded. A gap exists between the lower surface of the rotating shaft and the bottom surface of the first mounting hole, forming a foreign matter collection area. During the tightening of the dispensing screw, even if debris is generated, it will fall into the foreign matter collection area instead of into the medicine powder, thereby reducing the risk of medicine powder contamination.

[0020] The dispensing device of the present invention includes a dispensing screw head, a mounting base, and a hopper. The rotating shaft of the dispensing screw head is rotatably connected to the mounting base and is used to dispense material from the hopper. The dispensing screw head is connected to the mounting base via the rotating shaft. No powder-accommodating gap is formed between the outer wall of the dispensing screw, which is in direct contact with the powder, and the mounting base. Furthermore, a raised annular structure is provided at the top of the dispensing screw. Compared to existing technologies, the present invention effectively reduces material residue, prevents contaminants from easily entering the hopper and contaminating the material, and allows for longer intervals for disassembly, cleaning, and maintenance. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the disassembly screw head of the present invention.

[0022] Figure 2 This is a partial cross-sectional view of the rotating shaft of the present invention.

[0023] Figure 3 This is a front view of the disassembly screw of the present invention.

[0024] Figure 4 This is a top view of the disassembly screw of the present invention.

[0025] Figure 5 This is a cross-sectional view of the disassembly screw of the present invention.

[0026] Figure 6 This is a schematic diagram of the dispensing device of the present invention.

[0027] Figure 7 This is the present invention. Figure 6 A magnified view of a portion of point A in the middle.

[0028] The labels in the diagram represent:

[0029] 1. Distributor screw; 11. First mounting hole; 111. Positioning groove; 12. Third mounting hole; 13. Protruding ring; 2. Locking component; 3. Mounting base; 31. Countersunk hole; 32. Slot; 4. Rotating shaft; 41. First mating part; 411. Second mounting hole; 42. Second mating part; 43. Third mating part; 431. Slide rail; 5. Hopper; 6. Drive component. Detailed Implementation

[0030] The present invention will be further described in detail below. Unless otherwise specified, the instruments or materials used in the present invention are commercially available.

[0031] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0033] In this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," "fixed," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0034] like Figures 1 to 5 As shown, the dispensing screw head of this embodiment includes a dispensing screw 1 and a rotating shaft 4 connected to the dispensing screw 1. A first mounting hole 11 is formed at the top of the dispensing screw 1, and the lower part of the rotating shaft 4 is inserted into the first mounting hole 11. A distance S exists between the lower surface of the rotating shaft 4 and the bottom surface of the first mounting hole 11, with the distance S ranging from 0.5 mm to 5 mm. The space containing the distance S forms a foreign matter collection area. Even if debris is generated during the fastening of the dispensing screw 1, it will fall into the foreign matter collection area instead of into the powder, thereby reducing the risk of powder contamination.

[0035] like Figure 1 , Figure 2 , Figure 5 As shown, a second mounting hole 411 is laterally opened at the lower part of the rotating shaft 4, and a third mounting hole 12 is laterally opened on the upper outer peripheral wall of the dispensing screw 1. The third mounting hole 12 is correspondingly arranged with the second mounting hole 411 and communicates with the first mounting hole 11. The dispensing screw head also includes a locking member 2, which is inserted into the second mounting hole 411 to connect the rotating shaft 4 and the dispensing screw 1. The locking member 2 of the present invention is built-in, so that no foreign objects will fall outside the dispensing screw 1 during installation, but will remain inside the dispensing screw 1, avoiding contamination of the medicine powder.

[0036] In this embodiment, even if some powder adheres to the dispensing screw 1 through the third mounting hole 12, it will enter the foreign matter collection area between the dispensing screw 1 and the rotating shaft 4, reducing the risk of powder contamination. Preferably, the height of the third mounting hole 12 on the outer wall side of the dispensing screw 1 is higher than its height on the inner wall side of the dispensing screw 1. Thus, when powder falls into the third mounting hole 12, it slides downward to the foreign matter collection area under the action of gravity.

[0037] In this embodiment, the inner wall of the second mounting hole 411 is provided with an internal thread, and the outer peripheral wall of the locking member 2 is provided with an external thread, with the internal thread and the external thread cooperating.

[0038] The inner wall of the first mounting hole 11 is provided with a positioning groove 111, which is opposite to the third mounting hole 12. One end of the locking member 2 is engaged in the positioning groove 111, and the other end is located in the second mounting hole 411. The positioning groove 111 and the third mounting hole 12 restrict the position of the locking member 2, thereby restricting the relative position of the rotating shaft 4 and the sub-assembly screw 1, which is beneficial to the locking connection between the rotating shaft 4 and the sub-assembly screw 1.

[0039] In this embodiment, the locking member 2 is a fastening bolt. Preferably, the locking member 2 has a cross-shaped groove or a straight groove on the side near the third mounting hole 12 to facilitate tightening or loosening.

[0040] like Figure 6 and Figure 7 As shown, the dispensing device of this embodiment includes a dispensing screw head, a mounting base 3, and a hopper 5. The rotating shaft 4 of the dispensing screw head is rotatably connected to the mounting base 3 and is used to dispense the material in the hopper 5. In this embodiment, the outer wall of the dispensing screw 1, which is in direct contact with the powder, does not form a powder-accommodating gap space between it and the mounting base 3. Compared with the existing technical solution where a powder-accommodating gap space is formed between the outer wall of the screw 1 and the mounting base 3, the dispensing screw 1 of this invention requires a longer interval for disassembly, cleaning, and maintenance.

[0041] like Figure 3 and Figure 5 As shown, a protruding ring 13 is provided at the top of the dispensing screw 1 along the outer circumference of the first mounting hole 11, and a countersunk hole 31 is provided at the bottom of the mounting base 3. The countersunk hole 31 and the protruding ring 13 are fitted together. The connection between the top of the dispensing screw 1 and the mounting base 3 in this invention is a reverse Z-type sealing connection. The sealing structure is formed by the convex-concave fit, which helps to prevent the powder from entering the interior of the dispensing screw 1.

[0042] like Figure 2 , Figure 7 As shown, the rotating shaft 4 includes a third mating part 43, a second mating part 42, and a first mating part 41, with diameters decreasing from top to bottom. The first mating part 41 is inserted into the first mounting hole 11, the second mating part 42 is connected to the convex ring 13, and the third mating part 43 is connected to the inner hole of the mounting base 3. The rotating shaft 4 is stepped, and with a fixed length of the first mounting hole 11, the size of the spacing S is determined by the length of the first mating part 41. Alternatively, a control element can be provided on the lower surface of the rotating shaft 4 to control the size of the spacing S. The control element can be a cone of a specific height or a sphere of a specific diameter, or a combination of both.

[0043] In this embodiment, the second mating part 42 and the convex ring 13 are interference-fitted, the first mating part 41 is inserted into the first mounting hole 11 and there is a gap between the outer wall of the first mating part 41 and the inner wall of the first mounting hole 11. The interference fit makes the sealing connection between the top of the rotating shaft 4 and the disassembly screw 1 tighter. Compared with the technical solution where the rotating shaft 4 and the disassembly screw 1 are also interference-fitted, the installation of the rotating shaft 4 and the disassembly screw 1 is more convenient.

[0044] The inner diameter of the convex ring 13 is d1, and the inner diameter of the first mounting hole 11 is d2, satisfying d2 < d1. Since the rotating shaft 4 is stepped, the use of convex rings 13 and first mounting holes 11 with different inner diameters facilitates the installation and fit with the rotating shaft 4.

[0045] like Figure 7 As shown, a slot 32 is provided on the inner wall of the mounting base 3, and a slide rail 431 is provided on the outer wall of the third mating part 43. The slide rail 431 and the slot 32 are mated together. This achieves the connection between the rotating shaft 4 and the mounting base 3.

[0046] like Figure 7 As shown, the dispensing device of the present invention also includes a hopper 5 and a drive component 6. The hopper 5 is located below the dispensing screw head, and the drive component 6 is located above the dispensing screw head. The drive component 6 is connected to the rotating shaft 4 and is used to drive the rotating shaft 4 to rotate. When the rotating shaft 4 rotates, it drives the dispensing screw 1 to rotate together, thereby dispensing the material in the hopper 5.

[0047] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention, or modify them into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the scope of the present invention, should fall within the protection scope of the present invention.

Claims

1. A dispensing device, characterized in that: The assembly includes a dispensing screw head, a mounting base (3), and a hopper (5). The dispensing screw head includes a dispensing screw (1) and a rotating shaft (4) connected to the dispensing screw (1). The top of the dispensing screw (1) has a first mounting hole (11). The lower part of the rotating shaft (4) is inserted into the first mounting hole (11). There is a gap between the lower surface of the rotating shaft (4) and the bottom surface of the first mounting hole (11). The rotating shaft (4) of the dispensing screw head is rotatably connected to the mounting base (3) and is used to dispense materials in the hopper (5). The lower part of the rotating shaft (4) is provided with a second mounting hole (411) and the upper outer peripheral wall of the disassembly screw (1) is provided with a third mounting hole (12). The third mounting hole (12) is corresponding to the second mounting hole (411) and communicates with the first mounting hole (11). The disassembly screw head also includes a locking member (2). The locking member (2) is inserted into the second mounting hole (411) to connect the rotating shaft (4) and the disassembly screw (1).

2. The dispensing device according to claim 1, characterized in that: The top of the disassembly screw (1) is provided with a convex ring (13) along the outer circumferential direction of the first mounting hole (11), and the bottom of the mounting base (3) is provided with a countersunk hole (31), and the countersunk hole (31) and the convex ring (13) are in concave-convex fit.

3. The dispensing device according to claim 2, characterized in that: The inner diameter of the convex ring (13) is d1, and the inner diameter of the first mounting hole (11) is d2, satisfying d2 < d1.

4. The dispensing device according to claim 3, characterized in that: The rotating shaft (4) includes a third mating part (43), a second mating part (42) and a first mating part (41) with diameters decreasing from top to bottom. The first mating part (41) is inserted into the first mounting hole (11), the second mating part (42) is connected to the convex ring (13), and the third mating part (43) is connected to the inner hole of the mounting base (3).

5. The dispensing device according to claim 4, characterized in that: The mounting base (3) has a slot (32) on its inner wall and a slide rail (431) on its outer wall. The slide rail (431) and the slot (32) are fitted together.

6. The dispensing device according to claim 1, characterized in that: The inner wall of the second mounting hole (411) is provided with an internal thread, and the outer peripheral wall of the locking member (2) is provided with an external thread, and the internal thread and the external thread are matched.

7. The dispensing device according to claim 1, characterized in that: The inner wall of the first mounting hole (11) is provided with a positioning groove (111). The positioning groove (111) is arranged opposite to the third mounting hole (12). One end of the locking member (2) is engaged in the positioning groove (111), and the other end is located in the second mounting hole (411).

8. The dispensing device according to claim 1, characterized in that: The locking component (2) is a positioning pin.

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