Multi-section type deformation screw

Abstract

The utility model relates to the technical field of screws, in particular to a multi-section type deformation screw which comprises a first rod body and a second rod body which are different in diameter, spiral blades are arranged on the outer side wall of the first rod body and the outer side wall of the second rod body, the first rod body and the second rod body are connected end to end in the axial direction, and an insertion locking structure is arranged at the connecting position. And the helical blades on the first rod body and the second rod body form a continuous helical structure after being connected. The utility model is favorable for solving the problems of difficulty in processing, poor structural flexibility and high maintenance cost of some conventional reducing screws.

Description

Technical Field

[0001] The utility model relates to the technical field of screws, in particular to a multi-section deformed screw. Background Art

[0002] During the pile foundation construction process of the prior art, the spiral drill rod is a very common construction tool. Using the spiral drill rod to form a pile not only has a fast construction speed but also can well control the construction quality; in addition, due to the use of a variable-frequency motor, the rotation speed of the drill rod can be well controlled, making it applicable to a wider range of geological conditions. However, during the construction process of the spiral drill rod, soil will be unearthed, adding a lot of extra transportation workload to the construction; moreover, in geological conditions with more stones, ordinary drill rods need to break and bring out the stones and hard soil to the ground, consuming a large amount of energy and wasting resources such as stones and hard soil during this process.

[0003] Chinese Patent CN206091898U discloses a variable-diameter spiral drill rod, which includes a core pipe and spiral blades. The feature is that between the spiral blades and along the direction of the spiral blades, variable-diameter blocks are arranged on the core pipe. The variable-diameter blocks continuously or segmentally increase the diameter of the core pipe from bottom to top. During the drilling process, the variable-diameter blocks can gradually squeeze and compact the soil drilled by the spiral blades downward and outward, thus playing a dual role of avoiding or reducing the amount of unearthed soil and compacting the surrounding soil. However, in this technical solution, the diameter change of the screw is achieved by adding variable-diameter blocks. This structure is difficult to process, and the processed structure is fixed and cannot be flexibly adjusted according to the actual complex and diverse working environments. After local structures are worn and damaged, relatively low-cost maintenance cannot be carried out. Summary of the Utility Model

[0004] The utility model provides a multi-section deformed screw, which is beneficial to solving the problems of difficult processing, poor structural flexibility and high maintenance cost of some existing variable-diameter screws.

[0005] The utility model is realized as follows:

[0006] A multi-section deformed screw includes a first rod body and a second rod body with different diameters. Spiral blades are arranged on the outer side walls of the first rod body and the second rod body. The first rod body and the second rod body are connected end to end axially, and an insertion and locking structure is arranged at the connection. After connection, the spiral blades on the first rod body and the second rod body form a continuous spiral structure; the insertion and locking structure includes a convex column and a slot. The convex column and the slot are respectively arranged at both axial ends of the first rod body or the second rod body. The outer contour of the convex column is adapted to the inner contour of the slot. The convex column protrudes outward along the axial direction of the first rod body or the second rod body. When the first rod body and the second rod body are connected end to end, the convex column is inserted into the slot to form an insertion structure. A connection hole extending to the outer side wall of the first rod body or the second rod body is arranged in the radial direction of the insertion structure, and a locking bolt is threadedly connected in the connection hole.

[0007] Based on the above technical solution, the cross-sectional profile of the convex post is circular, and a clamping block is provided on its outer side wall, and a clamping groove adapted to the profile of the clamping block is provided in the slot.

[0008] Based on the above technical solution, the connecting hole includes a first connecting hole provided on the side wall of the clamping block and a second connecting hole provided on the side wall of the slot. The first connecting hole is a threaded hole structure, and the second connecting hole is a through hole structure radially penetrating the side wall of the slot.

[0009] Based on the above technical solution, the second connecting hole is a countersunk through hole structure, and a plug is provided at the opening of the second connecting hole.

[0010] Based on the above technical solution, the diameter of the first rod body is smaller than that of the second rod body. Variable diameter cones are provided at both axial ends of the first rod body, and the diameter of the axial outer end of the first rod body is the same as that of the second rod body.

[0011] Based on the above technical solution, the spiral blade is provided with a solidifying and strengthening structure, and the solidifying and strengthening structure includes rib plates located on both end faces of the spiral blade.

[0012] Based on the above technical solution, the spiral blade is a composite structure, in which a skeleton is provided in the middle, panels are composite on both the upper and lower sides of the skeleton, and a number of spaced flange structures are provided at both the upper and lower ends of the skeleton, and the flange structure extends to the outside of the panel to form the rib plate.

[0013] Based on the above technical solution, a number of the rib plates are equidistantly spaced along the spiral path of the bolt blade.

[0014] Compared with the prior art, the present invention has at least the following advantages:

[0015] By providing the first rod body and the second rod body connected end to end, the present invention enables the screw rod to be spliced by a number of rod body components with a split structure, so as to form a multi-section deformed screw rod by means of the diameter difference of different rod bodies. This is conducive to independent production and processing of each rod body component, subdivision and streamlining of processing procedures, thereby reducing the processing difficulty of the screw rod; in addition, the spliced structure enables the assembly device of the screw rod to be flexible and variable, and can be flexibly adjusted and controlled according to actual needs for the length and rod diameter segmentation changes of the screw rod, making its adaptability better and enabling precise operation; furthermore, this split splicing structure enables low-cost maintenance to be achieved by only replacing some rod body components when local structures are worn or damaged, extending the service life of the overall structure and improving the product utilization rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for 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, without creative efforts, other relevant drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a schematic structural diagram of a multi - section deformable screw rod in an embodiment;

[0018] Figure 2 For Figure 1 It is a schematic structural diagram of the first rod body in

[0019] Figure 3 For Figure 1 It is a schematic structural diagram of the second rod body in

[0020] Figure 4 It is a schematic diagram of the insertion structure of the first rod body and the second rod body;

[0021] Figure 5 It is a partial cross - sectional view of the locking structure of the first rod body and the second rod body;

[0022] Figure 6 It is a schematic diagram of the assembled state of a multi - section deformable screw rod in an embodiment;

[0023] Figure 7 It is a schematic structural diagram of a spiral blade in an embodiment;

[0024] Figure 8 It is a cross - sectional view of a spiral blade in an embodiment.

[0025] Reference numerals in the figure: 1. First rod body; 2. Second rod body; 3. Spiral blade; 31. Rib plate; 32. Skeleton; 33. Panel; 4. Convex column; 41. Block; 42. First connection hole; 5. Slot; 51. Card slot; 52. Second connection hole; 6. Locking bolt; 7. Plug. Detailed implementation manners

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below 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 shall fall within the protection scope of the present utility model. Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model.

[0027] 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.

[0028] It should be noted that when an element is referred to as being "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.

[0029] The present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] Embodiment 1: With reference to Figure 1-6 , this embodiment discloses a multi-segment deformable screw, including a first rod body 1 and a second rod body 2 with different diameters. Among them, as Figure 1 shown, it includes two second rod bodies 2 with larger diameters and one first rod body 1 with a smaller diameter. The first rod body 1 is axially inside the two second rod bodies 2 and is connected end to end in sequence. Variable diameter cones are provided at both axial ends of the first rod body 1, and the diameter of the outer axial end of the first rod body 1 is the same as the diameter of the second rod body 2.

[0031] Spiral blades 3 are provided on the outer side walls of the first rod body 1 and the second rod body 2. The radially inner ends of the spiral blades 3 are welded and fixed to the outer side walls of the first rod body 1 or the second rod body 2. The spiral blades 3 on the first rod body 1 and the second rod body 2 form a continuous spiral structure after connection, and the outer diameters of the spiral blades 3 are the same. In other embodiments, the outer diameters of the spiral blades 3 can also be set to a structure with a natural transition in size.

[0032] The first rod body 1 and the second rod body 2 are axially connected end to end, and a plug-in locking structure is provided at the connection. Refer to Figure 2 and Figure 3 As shown, the plug-in locking structure includes a convex column 4 and a slot 5. The convex column 4 and the slot 5 are respectively arranged at both axial ends of the first rod body 1 or the second rod body 2. The outer contour of the convex column 4 is adapted to the inner contour of the slot 5. In this embodiment, the convex column 4 is a cylindrical structure, and the slot 5 is a circular counterbore structure. After plugging, the outer side wall of the convex column 4 fits with the inner side wall of the slot 5. That is to say, the convex column 4 protrudes outward in the axial direction of the first rod body 1 or the second rod body 2. The cross-sectional contour of the convex column 4 is circular. When the first rod body 1 and the second rod body 2 are connected end to end, the convex column 4 is inserted into the slot 5 to form a plug-in structure.

[0033] Furthermore, a clamping block 41 is provided on the outer side wall of the convex column 4. Two clamping blocks 41 are symmetrically arranged to form a limiting structure for the axial angular rotation of the convex column 4. A clamping groove 51 adapted to the contour of the clamping block 41 is provided in the slot 5. During assembly, the convex column 4 is inserted into the slot 5, and the clamping block 41 is inserted into the clamping groove 51 to form a limiting structure. It should be noted that the starting and ending positions of the spiral blade 3 correspond to this limiting structure. Therefore, after the first rod body 1 and the second rod body 2 are joined, the spiral blades 3 on their outer side walls can form a continuous spiral structure.

[0034] A connecting hole extending to the outer side wall of the first rod body 1 or the second rod body 2 is provided in the radial direction of the plug-in structure, and a locking bolt 6 is threadedly connected in the connecting hole. The connecting hole includes a first connecting hole 42 provided on the side wall of the clamping block 41 and a second connecting hole 52 provided on the side wall of the slot 5. The first connecting hole 42 is a threaded hole structure, and the second connecting hole 52 is a through hole structure radially penetrating the side wall of the slot 5.

[0035] Furthermore, in combination with Figure 4 and Figure 5 As shown, the second connecting hole 52 is a countersunk through hole structure, and a plug 7 is provided at the opening of the second connecting hole 52. After the locking bolt 6 is assembled, its nut sinks into the second connecting hole 52, and the outer plug 7 can block the outer opening of the second connecting hole 52 to form a closed structure. This method is beneficial for locking operations from the side, which makes the disassembly and assembly operations of the first rod body 1 and the second rod body 2 more convenient and fast.

[0036] As Figure 6 shown, after the multi-section deformable screw rod in this embodiment is assembled, its head and tail ends are connected with pointed heads and connecting section structures according to actual needs.

[0037] Embodiment 2: On the basis of Embodiment 1, in combination with Figure 7As shown, in this embodiment, in order to make the structure of the spiral blade 3 more stable and reliable, the spiral blade 3 is provided with a solid strengthening structure. The solid strengthening structure includes rib plates 31 on both end faces of the spiral blade 3. The rib plates 31 and the spiral blade 3 are of an integral structure. The rib plates 31 are in a strip-shaped flange structure on the upper and lower end faces of the spiral blade 3, and the long side direction thereof is parallel to the radial direction of the rod body. A plurality of the rib plates 31 are evenly spaced along the spiral path of the bolt blade. The main function of the rib plates 31 is to improve the structural strength of the spiral blade 3, making it not easily deformed or broken. The secondary function of the rib plates 31 is to increase the surface structure change of the spiral blade 3, so that it has a larger friction coefficient when contacting the external structure, and can improve the material guiding efficiency.

[0038] Embodiment 3: On the basis of Embodiment 2, combined with Figure 8 As shown, the spiral blade 3 is a composite structure, in which a framework 32 made of aluminum alloy is provided in the middle. Panels 33 made of coated aluminum plates are compounded on both the upper and lower sides of the framework 32, and a plurality of spaced flange structures are provided at both ends of the framework 32. The flange structures extend to the outside of the panel 33 to form the rib plates 31. This structure is beneficial to improving the structural strength of the spiral blade 3 and also beneficial to improving the structural flexibility of the spiral blade 3. It can select spiral blades 3 made of panels 33 of different materials for targeted operations according to actual operation requirements.

[0039] 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 make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A multi-stage deformable screw, characterized in that, It includes a first rod body (1) and a second rod body (2) with different diameters. Spiral blades (3) are provided on the outer side walls of the first rod body (1) and the second rod body (2). The first rod body (1) and the second rod body (2) are axially connected end to end, and a plug-in locking structure is provided at the connection. After connection, the spiral blades (3) on the first rod body (1) and the second rod body (2) form a continuous spiral structure; The plug-in locking structure includes a convex column (4) and a slot (5). The convex column (4) and the slot (5) are respectively provided at the axial two ends of the first rod body (1) or the second rod body (2). The outer contour of the convex column (4) is adapted to the inner contour of the slot (5). The convex column (4) protrudes outward in the axial direction of the first rod body (1) or the second rod body (2). When the first rod body (1) and the second rod body (2) are connected end to end, the convex column (4) is inserted into the slot (5) to form a plug-in structure. A connection hole extending to the outer side wall of the first rod body (1) or the second rod body (2) is provided in the radial direction of the plug-in structure, and a locking bolt (6) is threadedly connected in the connection hole.

2. A multi - segment deformable screw according to claim 1, characterized in that, The cross-sectional contour of the convex column (4) is circular, and a clamping block (41) is provided on its outer side wall. A clamping groove (51) adapted to the contour of the clamping block (41) is provided in the slot (5).

3. The multi-stage deformable screw according to claim 2, wherein, The connection hole includes a first connection hole (42) provided on the side wall of the clamping block (41) and a second connection hole (52) provided on the side wall of the slot (5). The first connection hole (42) is a threaded hole structure, and the second connection hole (52) is a through hole structure radially penetrating the side wall of the slot (5).

4. The multi-stage deformable screw according to claim 3, wherein, The second connection hole (52) is a countersunk through hole structure, and a plug (7) is provided at the opening of the second connection hole (52).

5. A multi-segment deformable screw according to claim 1, characterized in that The diameter of the first rod body (1) is smaller than that of the second rod body (2). Reducing cones are provided at the two axial ends of the first rod body (1), and the diameter of the axial outer end of the first rod body (1) is the same as that of the second rod body (2).

6. A multi-stage deformable screw according to claim 1, characterized in that, The spiral blade (3) is provided with a solid strengthening structure, and the solid strengthening structure includes rib plates (31) located on the two end faces of the spiral blade (3).

7. A multi-stage deformable screw according to claim 6, characterized in that The spiral blade (3) is a composite structure, in which a skeleton (32) is provided in the middle, panels (33) are composite on the upper and lower sides of the skeleton (32), and a number of spaced convex flange structures are provided at the upper and lower ends of the skeleton (32), and the convex flange structures extend to the outside of the panel (33) to form the rib plates (31).

8. A multi-stage deformable screw according to claim 6, characterized in that, A number of the rib plates (31) are equidistantly spaced along the spiral path of the bolt blade.

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