Screw structure

Abstract

The utility model relates to the technical field of screws, in particular to a screw structure which comprises a rod body and a spiral blade, the spiral blade is of a spiral structure, the inner side end of the spiral blade is fixedly connected with the outer side wall of the rod body, the spiral blade comprises a main body of a flat plate body structure, and a plurality of protruding edges distributed at intervals are arranged on the upper end face and the lower end face of the main body. The long edge direction of the protruding edge is parallel to the radial direction of the rod body, extending chamfers are arranged between the two ends of the short edge direction of the protruding edge and the main body, and the extending chamfers enable the protruding edge and the outer end face of the main body to form a smooth transition fluctuating end face structure. The screw rod structure is beneficial to solving the problems that the screw blade structure in some existing screw rod structures is simple, and light weight and high stability of the structure are difficult to consider at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of screws, in particular to a screw structure with stable spiral blade structure. Background Art

[0002] Screw conveyors are well-known to the general public. A screw with threaded blades is installed inside it, and the spiral blades are spirally fixed on the outer side wall of the rod body.

[0003] At present, some spiral blades of screws are formed by rolling a flat long strip plate through a cold rolling mill and a specific mold. The long strip plate often uses a metal plate body with a relatively simple structure, and its surface is a flat end face structure. Most of the processed spiral blades are in the working condition of high-strength load feeding. If the thickness of the spiral blade is relatively thin, it is easy to deform and wear after long-term work. If the thickness of the spiral blade is relatively thick, it will increase its own structural weight and the working intensity of the driving device. Therefore, in the case of the relatively simple current spiral blade structure, how to balance structural lightweight and high structural stability has become a common problem in the industry. In most cases, only non-standard forms can be used for the parameter design and processing of spiral blades, resulting in disadvantages such as low production efficiency and poor adaptability. Summary of the Utility Model

[0004] The utility model provides a screw structure, which is beneficial to solving the problem that the spiral blade structure in some existing screw structures is simple and it is difficult to balance structural lightweight and high structural stability.

[0005] The utility model is implemented as follows:

[0006] A screw structure includes a rod body and spiral blades. The spiral blades are in a spiral structure, and the inner end of the spiral blade is connected and fixed to the outer side wall of the rod body. The spiral blade includes a main body with a flat plate structure. There are a number of convex ribs spaced at intervals on the upper and lower end faces of the main body. The long side direction of the convex rib is parallel to the radial direction of the rod body, and there are extended chamfers between the two ends of the short side direction of the convex rib and the main body. The extended chamfers make the convex rib and the outer end face of the main body form a smooth transition undulating end face structure.

[0007] Based on the above technical solution, the thickness of the convex rib is less than one-half of the thickness of the main body structure.

[0008] Based on the above technical solution, a number of convex ribs are arranged at equal intervals.

[0009] Based on the above technical solution, the convex ribs at the upper and lower ends of the main body are arranged in alignment.

[0010] Based on the above technical solution, a sunk groove is provided on the connection side of the spiral blade and the rod body, and the top and inner side of the sunk groove are of open structures.

[0011] On the basis of the above technical solution, the spiral blade is of a composite structure, including a framework and panels compounded on both the upper and lower sides of the framework. The framework is provided with a plurality of strip-shaped flange structures at both the upper and lower ends, and the strip-shaped flange structures extend to the outer ends of the surface layer to form the convex ribs.

[0012] On the basis of the above technical solution, the convex ribs and the framework are of an integral structure.

[0013] On the basis of the above technical solution, a plurality of hollow structures are provided on the framework, and after the panels and the framework are compounded, the hollow structures form inner cavities.

[0014] On the basis of the above technical solution, communication holes are provided between adjacent inner cavities; a circulating pipeline for connecting an external liquid supply device is provided inside the rod body, and the inner cavities at both the head and tail ends of the spiral blade are communicated with the circulating pipeline.

[0015] Compared with the prior art, the present utility model has at least the following advantages:

[0016] By providing convex rib structures at both the upper and lower ends of the spiral blade, the present utility model enriches the main structure of the spiral blade. The convex ribs can form the rib plate structure of the main body of the spiral blade, thereby improving the structural strength of the spiral blade. The weight of the structure can be reduced by reducing the thickness of the main body on both sides of the convex ribs. Therefore, compared with the existing spiral blade structure under the same structural strength benchmark, the lightweight effect can be achieved. Therefore, this structural design is beneficial to solving the problem that the spiral blade structure in some existing screw structures is simple and it is difficult to balance structural lightweight and high structural stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is a schematic diagram of a screw structure in an embodiment;

[0019] Figure 2 It is a schematic diagram of the extended state structure of a spiral blade in an embodiment;

[0020] Figure 3 It is a structural change diagram before and after the convex ribs are rolled;

[0021] Figure 4 It is a partial three-dimensional structure schematic diagram of the convex ribs;

[0022] Figure 5 Schematic structural diagram of the sinking groove in an embodiment;

[0023] Figure 6 Partial schematic diagram of the composite structure of the spiral blade in an embodiment;

[0024] Figure 7 Half-sectional view of the framework in an embodiment;

[0025] Figure 8 Schematic diagram of the positions of the liquid inlet and the liquid outlet in an embodiment.

[0026] Labels in the figure: 1. Rod body; 2. Spiral blade; 21. Main body; 22. Convex rib; 23. Extended chamfer; 3. Sinking groove; 4. Framework; 41. Inner cavity; 42. Connecting hole; 5. Panel; 6. Liquid inlet; 7. Liquid outlet. Specific embodiments

[0027] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model. Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the present utility model to be protected, but merely represents the selected embodiments of the present utility model.

[0028] In the description of the present utility model, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality of" means two or more unless otherwise specifically defined.

[0029] It should be noted that when an element is referred to as "fixedly provided on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to an element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for illustrative purposes and do not represent the only embodiments.

[0030] The following further describes the present utility model in detail with reference to the accompanying drawings and specific embodiments.

[0031] Example 1: Combination Figure 1-4 , this example discloses a screw structure, which can take into account both structural lightweight and high strength through ingenious structural design. The screw structure includes a rod body 1 and a spiral blade 2. The spiral blade 2 has a spiral structure. The inner end of the spiral blade 2 is fixedly connected to the outer wall of the rod body 1. After being connected to an external power transmission device, the rod body 1 and the spiral blade 2 can rotate synchronously. The spiral blade 2 can form a lateral pushing force after rotation by virtue of its own spiral shape, so that it can be applied to work in a conveyor.

[0032] Combination Figure 2 , Figure 2 is a long strip plate blank that has not been processed by a cold rolling mill, that is, the extended state of the spiral blade 2. In this example, the spiral blade 2 includes a main body 21 with a flat plate structure. There are several convex ribs 22 distributed at intervals on the upper and lower end faces of the main body 21. The convex ribs 22 are flange structures, which are manufactured by lathe processing or stamping. The long side direction of the convex ribs 22 is parallel to the radial direction of the rod body 1. Combination Figure 3 As shown, the convex ribs 22 at the upper and lower ends of the main body 21 are arranged in alignment. The convex ribs 22 form a ribbed plate structure at the upper and lower ends of the main body 21, which can improve the structural stability of the main body 21, making the processed spiral blade 2 not easily deformed and having a stronger bearing capacity. The weight of the structure can be reduced by reducing the thickness of the main body 21 on both sides of the convex ribs 22, so that under the benchmark of the same structural strength, the lightweight effect can be achieved compared with the existing spiral blade 2 structure.

[0033] There are extended chamfers 23 between the two ends of the short side direction of the convex ribs 22 and the main body 21. The extended chamfers 23 are linearly obtained by extrusion of the cold rolling mill at both ends of the short side direction of the convex ribs 22. In actual situations, the specification of the extended chamfer 23 on one side of the convex ribs 22 is relatively small, and the specification of the extended chamfer 23 on the other side is relatively large. This is affected by the cold rolling processing direction. Appropriate parameter settings can be made according to the spiral direction, which will not affect the purpose of smooth transition of the extended chamfer 23. The extended chamfer 23 makes the outer end faces of the convex ribs 22 and the main body 21 form a smooth transition undulating end face structure.

[0034] In order to reduce the influence of the convex rib 22 structure on the material feeding process, the thickness of the convex rib 22 is less than half of the thickness of the main body 21 structure. In this example, the thickness of the main body 21 is 6 mm, and the thickness of the convex rib 22 is 2 mm. In order to ensure structural stability and not affect the subsequent rotation balance, the convex ribs 22 are arranged at equal intervals.

[0035] The slight undulation change on the surface of the spiral blade 2 is also beneficial to increasing the friction coefficient between the spiral blade 2 and the material during the material feeding process, making the material feeding action more efficient and stable.

[0036] Embodiment 2: On the basis of Embodiment 1, combined with Figure 5 As shown, in this embodiment, in order to improve the welding strength between the spiral blade 2 and the rod body 1, a sunk groove 3 is provided on the connecting side of the spiral blade 2 and the rod body 1, and the top and inner side of the sunk groove 3 are of an open structure. The function of the sunk groove 3 is to increase the retention amount of the solder, so that after the solder cools, it has a larger contact area with the rod body 1 and the spiral blade 2, so that the welding can be more firm, which improves the structural strength of the screw structure from another angle.

[0037] Embodiment 3: On the basis of Embodiment 1, combined with Figure 6 As shown, the spiral blade 2 is a composite structure, including a skeleton 4 and panels 5 compounded on the upper and lower sides of the skeleton 4. The skeleton 4 is provided with a plurality of strip-shaped flange structures at the upper and lower ends, and the strip-shaped flange structures extend to the outer ends of the surface layer to form the convex ribs 22. The panels 5 on both sides of the convex ribs 22 form the area where the main body 21 is located after compounding.

[0038] In this embodiment, the convex ribs 22 and the skeleton 4 are of an integral structure. With its stable integral structure, the overall structure of the spiral blade 2 will not easily break and deform, thereby improving its structural strength. In addition, the use of a composite structure makes the structure of the spiral blade 2 richer and has more function options. The material of the panel 5 can be flexibly selected according to actual needs, and it is also beneficial to use lighter materials for processing to achieve the effect of structural lightweight.

[0039] Embodiment 4: On the basis of Embodiment 3, combined with Figure 7 and Figure 8 , in this embodiment, a plurality of hollow structures are provided on the skeleton 4, and the hollow structures form an inner cavity 41 after the panel 5 and the skeleton 4 are compounded.

[0040] Furthermore, communication holes 42 are provided between adjacent inner cavities 41; a circulation pipeline for connecting an external liquid supply device is provided inside the rod body 1, and liquid inlet ports 6 and liquid discharge ports 7 are provided at the head and tail ends of the spiral blade 2 for realizing the connection between the inner cavity 41 and the circulation pipeline, and jointly forming a circulation loop.

[0041] During actual operation, the circulation pipeline adopts a one-in-one-out double-pipe structure, so that the inner cavity 41 inside the spiral blade 2 forms a ring of the circulation loop, and the temperature control ability of the spiral rod can be improved by conducting coolant or heat-conducting oil, etc., so as to meet the temperature requirements or drying requirements of the conveying environment of specific materials.

[0042] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A screw structure, characterized in that, It includes a rod body (1) and a spiral blade (2). The spiral blade (2) is in a spiral structure. The inner end of the spiral blade (2) is fixedly connected to the outer wall of the rod body (1). The spiral blade (2) includes a main body (21) with a flat plate structure. A number of convex ridges (22) are arranged at intervals on the upper and lower end faces of the main body (21). The long side direction of the convex ridge (22) is parallel to the radial direction of the rod body (1). Extension chamfers (23) are provided between the two ends of the short side direction of the convex ridge (22) and the main body (21). The extension chamfers (23) make the outer end faces of the convex ridge (22) and the main body (21) form a smooth transition undulating end face structure.

2. The screw structure according to claim 1, characterized in that, The thickness of the convex ridge (22) is less than one-half of the structural thickness of the main body (21).

3. A screw structure according to claim 1 or 2, characterized in that, A number of convex ridges (22) are arranged at equal intervals.

4. A screw structure according to claim 3, characterized in that, The convex ridges (22) at the upper and lower ends of the main body (21) are arranged in alignment with each other.

5. A screw structure according to claim 1, characterized in that, A sink groove (3) is provided on the connection side of the spiral blade (2) and the rod body (1). The top and the inner side of the sink groove (3) are of an open structure.

6. A screw structure according to claim 1, characterized in that The spiral blade (2) is a composite structure, including a framework (4) and panels (5) composite on both the upper and lower sides of the framework (4). The framework (4) is provided with a number of strip-shaped flange structures at the upper and lower ends. The strip-shaped flange structures extend to the outer end of the surface layer to form the convex ridges (22).

7. A screw structure according to claim 6, characterized in that The convex ridge (22) and the framework (4) are of an integral structure.

8. A screw structure according to claim 6 or 7, characterized in that, A number of hollow structures are provided on the framework (4). After the panels (5) and the framework (4) are composite, the hollow structures form an inner cavity (41).

9. The screw structure according to claim 8, wherein, A communication hole (42) is provided between adjacent inner cavities (41); a circulation pipeline for connecting an external liquid supply device is provided inside the rod body (1). The inner cavities (41) at the head and the tail ends of the spiral blade (2) are communicated with the circulation pipeline.

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