Length-adjustable twin screw

Abstract

The utility model provides a length-adjustable twin screw, and belongs to the technical field of threaded rods. The length-adjustable twin screw comprises a connecting part and a screw part. The connecting part comprises a connecting column and four inserting plates, the four inserting plates are fixed to the two ends of the connecting column in the circumferential direction, and threaded columns penetrate through the interiors of the two inserting plates in a threaded mode; the screw rod part comprises two threaded rods, four inserting grooves are formed in the outer surfaces of one ends of the two threaded rods in the circumferential direction, the four inserting plates are inserted into the four inserting grooves in a sliding mode, and the ends of the two threaded rods are tightly attached to the inner surfaces of the two inserting grooves respectively. In the temporary or emergency use process, the length of the double screws can be conveniently extended and adjusted, the use flexibility can be improved, and use can be more convenient.

Description

Technical Field

[0001] This utility model relates to the field of threaded rod technology, and more specifically, to a twin-screw rod with adjustable length. Background Technology

[0002] Screw: A cylinder with helical grooves cut on its outer surface, or a cone with tapered helical grooves cut on its outer surface. Screws come in different heads, called external hexagonal screws. There are others, such as large flat screws, internal hexagonal screws, etc. Double thread means that the screw has threads on both ends, serving the function of connecting and fixing mechanical links. Standard thread, basic dimensions GB / T196-1981, is equivalent to ISO724.

[0003] Currently, the length of twin screws is relatively fixed and inconvenient to extend and adjust. This means that when a longer screw is needed temporarily, it is necessary to customize or find a longer twin screw, which is inconvenient and lacks flexibility. Therefore, it is necessary to propose a twin screw with adjustable length to solve the above problems. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides an adjustable-length twin screw, aiming to improve the problem that the relatively fixed length of the twin screw is inconvenient to extend and adjust. This means that when a longer screw is needed temporarily, it is necessary to customize or find a longer twin screw, which is inconvenient to use and has poor flexibility.

[0005] This utility model is implemented as follows:

[0006] This utility model provides a length-adjustable twin-screw, including a connecting part and a screw part.

[0007] The connecting part includes a connecting post and four insert plates. The four insert plates are circumferentially fixed at both ends of the connecting post, and the internal threads of two of the insert plates pass through the threaded post. The screw part includes two threaded rods. The outer surface of one end of each of the two threaded rods is circumferentially provided with four slots. The four insert plates are slidably inserted into the four slots. The ends of the two threaded posts are respectively in close contact with the inner surfaces of the two slots.

[0008] In one embodiment of this utility model, both ends of the connecting column are fixed with limiting posts, the limiting posts are located at the middle position of both ends of the connecting column, and one end of each of the two threaded rods is provided with an insertion hole, the limiting post being slidably inserted into the insertion hole.

[0009] In one embodiment of this utility model, the surfaces of the other two insert plates are fixed with limit blocks, and the slot is provided with a limit groove that matches the limit block. The limit block is slidably connected to the inside of the limit groove.

[0010] In one embodiment of this utility model, the insert plate has a threaded hole inside that matches the threaded post, and the threaded post is threadedly connected in the threaded hole.

[0011] In one embodiment of this utility model, the two threaded posts are arranged opposite to each other, and each of the ends of the two threaded posts is provided with a hexagonal groove.

[0012] The beneficial effects of this utility model are as follows: The adjustable-length twin-screw obtained through the above design allows for temporary or emergency extension of the twin-screw's length. When this is needed, a hex wrench can be inserted into the hexagonal groove on the threaded post. The threaded post is then rotated in the reverse direction to move its end away from the inner surface of the slot. The threaded rods at both ends of the connecting post are then stretched to the sides. Once pulled to the appropriate position, the hex wrench is inserted into the hexagonal groove again to rotate the threaded post in the forward direction, pressing the end of the threaded post against the inner surface of the slot, thus fixing the threaded rods to the connecting post. This facilitates the extension and adjustment of the twin-screw's length during temporary or emergency use, improving flexibility and convenience. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the adjustable-length twin-screw structure provided in this embodiment of the utility model;

[0015] Figure 2 An exploded view of the length-adjustable twin-screw structure provided for an embodiment of this utility model;

[0016] Figure 3 This utility model Figure 2 Enlarged view of point A in the middle;

[0017] Figure 4 A schematic cross-sectional view of the adjustable-length twin-screw connecting column provided for an embodiment of this utility model.

[0018] In the diagram: 100-connecting part; 110-connecting post; 120-limiting post; 130-insertion plate; 131-limiting block; 140-threaded hole; 150-threaded post; 200-screw part; 210-threaded rod; 220-slot; 221-limiting groove; 230-insertion hole. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Example

[0020] Please see Figures 1-4 This utility model provides a technical solution: an adjustable-length twin screw, including a connecting part 100 and a screw part 200.

[0021] Please see Figures 1-4 The connecting part 100 includes a connecting post 110 and four insert plates 130. The four insert plates 130 are circumferentially fixed at both ends of the connecting post 110, and the internal threads of two insert plates 130 pass through threaded posts 150.

[0022] Both ends of the connecting post 110 are fixed with limit posts 120. The limit posts 120 are located at the middle of the two ends of the connecting post 110. One end of each of the two threaded rods 210 is provided with a socket 230. The limit posts 120 are slidably inserted into the socket 230. Here, the limit posts 120 can improve the stability of the extension.

[0023] The surfaces of the other two insert plates 130 are fixed with limit blocks 131. The slot 220 has a limit groove 221 inside that matches the limit block 131. The limit block 131 is slidably connected inside the limit groove 221. The limit block 131 and the limit groove 221 prevent the threaded rod 210 from disengaging from the connecting post 110. The insert plate 130 has a threaded hole 140 inside that matches the threaded post 150. The threaded post 150 is threaded into the threaded hole 140. The two threaded posts 150 are arranged opposite each other. The ends of the two threaded posts 150 are provided with hexagonal grooves. A hex wrench is inserted into the hexagonal grooves, and then the threaded post 150 is rotated by the hex wrench to press the end of the threaded post 150 against the surface of the slot 220. This allows for positioning and fixation after the twin screws are extended, thereby improving the stability of use.

[0024] Please see Figure 1 and Figure 2The screw part 200 includes two threaded rods 210. Each of the two threaded rods 210 has four slots 220 circumferentially opened on the outer surface of one end. Four insert plates 130 are slidably inserted into the four slots 220. The ends of the two threaded posts 150 are respectively in close contact with the inner surfaces of the two slots 220.

[0025] Specifically, the working principle of this adjustable twin-screw is as follows: When it is necessary to extend the use of the twin-screw temporarily or in an emergency, a hex wrench can be inserted into the hexagonal groove on the threaded post 150. At this time, the threaded post 150 is rotated in the reverse direction so that its end is away from the inner surface of the slot 220. Then, the threaded rods 210 at both ends of the connecting post 110 are stretched to both sides. After being pulled to the appropriate position, the hex wrench is inserted into the hexagonal groove again and the threaded post 150 is rotated in the forward direction so that the end of the threaded post 150 is pressed against the inner surface of the slot 220, thereby positioning and fixing the threaded rods 210 and the connecting post 110. In this way, the length of the twin-screw can be easily extended and adjusted during temporary or emergency use, which is beneficial to improving the flexibility of use and making it more convenient to use.

[0026] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A length-adjustable double screw rod, comprising a connecting part (100) and screw rod parts (200) movably connected at both ends of the connecting part (100), characterized in that, the connecting part (100) comprises a connecting column (110) and four plug-in plates (130), two of which are fixed at both ends of the connecting column (110) in a circumferential direction, and the interiors of the other two are threaded with threaded columns (150); the screw rod part (200) comprises two threaded rods (210), the outer surfaces of one end of the two threaded rods (210) are each circumferentially provided with four insertion slots (220), four plug-in plates (130) are slidingly inserted into the interiors of the four insertion slots (220), and the end portions of the two threaded columns (150) are respectively in close contact with the inner surfaces of the two insertion slots (220).

2. A length adjustable twin screw as claimed in claim 1, wherein, The connecting column (110) is fixed with a limiting column (120) at both ends, the limiting column (120) is located at the middle position of the connecting column (110), the interiors of one end of the two threaded rods (210) are each provided with an insertion hole (230), and the limiting column (120) is slidingly inserted into the interior of the insertion hole (230).

3. The length adjustable twin screw as claimed in claim 1, wherein, The surfaces of the other two plug-in plates (130) are each fixed with a limiting block (131), the interior of the insertion slot (220) is provided with a limiting slot (221) matched with the limiting block (131), and the limiting block (131) is slidingly connected to the interior of the limiting slot (221).

4. The length adjustable twin screw as claimed in claim 1, wherein, The interior of the plug-in plate (130) is provided with a threaded hole (140) matched with the threaded column (150), and the threaded column (150) is threadedly connected in the threaded hole (140).

5. The length adjustable twin screw as claimed in claim 1, wherein, The two threaded columns (150) are oppositely arranged, and the end portions of the two threaded columns (150) are each provided with a hexagonal groove.

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