Mechanical structure connecting device

Abstract

The utility model relates to and discloses a mechanical structure connecting device which comprises a connecting piece, the connecting piece is provided with a threaded through hole, and the connecting piece is connected with a connected object or arranged on the connected object. The expansion bodies are connected with the connecting piece, each expansion body is formed by connecting a plurality of expansion sections end to end, each expansion section is provided with an elastic piece, the two ends of each elastic piece are connected with the adjacent expansion sections respectively, and a conical through hole is defined by the expansion bodies; the upper side of the screw is in threaded connection with the threaded through hole, the lower side of the screw abuts against the hole wall of the conical through hole, butt joint grooves are formed in the two ends of the screw, and when the screw moves close to the connecting piece, the expansion body expands outwards. The expansion section is tightly attached to the hole wall of the connecting hole due to the elastic effect of the elastic piece, so that the extrusion contact area of the expansion body to the hole wall of the connecting hole is increased, and the connecting hole is better pressed to reinforce the connection between connected objects.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical structure connection and fixation, in particular to a mechanical structure connection device. Background Art

[0002] In mechanical structural connections, a stable connection between two components is crucial. To secure a mechanical component to a perforated mechanical component or wall, there are currently two main methods: threaded and expansion connections. Examples include screw connections, expansion bolts, internal diameter expansion pins, and pneumatic integral support chucks.

[0003] Screw-type connections are suitable for mechanical structures or walls with threaded holes, leveraging the meshing principle of threads to ensure the tightness and stability of the connected components. Expansion bolts are a more flexible connection method and can be used in walls with straight holes, making them particularly suitable for securing heavy equipment or large structures. They work by expanding to secure the bolt firmly within the hole. Expansion pins are designed for mechanical structures requiring high precision and are often used to connect components with through-holes. Expansion pins achieve securement through single-end adjustment. Pneumatic integral support chuck connections are another connection method suitable for structures with blind holes, using a pneumatic device to achieve securement. While tightening a screw, expansion bolt, or expansion pin at one end strengthens the connection, adjusting the pneumatic element at the other end of the pneumatic integral support chuck strengthens the connection. Existing threaded and expansion connections rely on single-end adjustment to secure the connection, significantly limiting the adjustment options for mechanical structure connections and making them difficult to adjust and secure in complex installation spaces. Moreover, when the expansion body connected by the inner diameter expansion pin is embedded in the connection hole of the connecting object, the expansion body expands and squeezes the wall of the connection hole to fix the connection, but only the end of the expansion body squeezes the wall of the connection hole, resulting in a small squeezing area of ​​the expansion body on the wall of the connection hole, which easily leads to the problem of loose connection. Utility Model Content

[0004] The technical problem to be solved by the utility model is to solve the problem that the expansion body has a small extrusion area on the wall of the connection hole, resulting in an unstable connection.

[0005] In order to solve the above technical problems, the utility model provides a mechanical structure connection device, including: a connecting member, which is provided with a threaded through hole; a plurality of expansion bodies, which are connected to the connecting member, and the expansion body is formed by connecting a plurality of expansion sections end to end, and the expansion section is provided with an elastic sheet, and the two ends of the elastic sheet are respectively connected to adjacent expansion sections, and the plurality of expansion bodies are enclosed to form a conical through hole, and the first end of the conical through hole with a small aperture is connected to the threaded through hole; a screw, the upper side of the screw is threadedly connected to the threaded through hole, and the lower side of the screw is against the wall of the tapered through hole, and both ends of the screw are provided with docking grooves, and when the screw moves toward the connecting member, the expansion body expands outward.

[0006] Furthermore, the expansion body is formed by connecting a plurality of expansion segments of different lengths end to end, and the lengths of the plurality of expansion segments gradually increase in a direction approaching the connecting member.

[0007] Furthermore, the screw includes a conical portion and a threaded cylindrical portion, the cylindrical portion is threadedly connected to the threaded through hole, the first end of the conical portion with the smallest diameter is connected to the cylindrical portion, the conical portion is located at the conical through hole, and at least part of the side surface of the conical portion is against the wall of the conical through hole.

[0008] Furthermore, the expansion body consists of a first expansion segment, a second expansion segment and a third expansion segment whose lengths decrease successively, the first expansion segment, the second expansion segment and the third expansion segment are connected in sequence, the first expansion segment is connected to the connecting member, and the length of the first expansion segment is: d1 = H*(d2+d3) / R; wherein d1 is the length of the first expansion segment, d2 is the length of the second expansion segment, d3 is the length of the third expansion segment, H is the height of the conical portion, and R is the maximum radius of the conical portion.

[0009] Furthermore, the second end of the tapered portion with the largest diameter passes through the tapered through hole port and extends outward, and the diameter of the second end of the tapered portion is larger than the maximum inner diameter of the tapered through hole and smaller than the outer diameter of the connecting piece.

[0010] Furthermore, a gap is left between two adjacent expansion bodies, and the gap is connected to the tapered through hole.

[0011] Furthermore, an annular groove is provided at the connection between the connecting member and the expansion body, and the annular groove is located between the threaded through hole and the tapered through hole.

[0012] Furthermore, an annular protrusion is provided on the side surface of the connecting piece, the annular protrusion is located at the end of the threaded through hole, and the annular protrusion is provided with a threaded hole.

[0013] Furthermore, the docking groove is a hexagonal groove.

[0014] Furthermore, the expansion body is made of elastic material.

[0015] Compared with the prior art, the mechanical structure connection device of the embodiment of the present utility model has the following beneficial effects: the expansion body connected to the connecting piece is fixed on the connected object by being integrally connected to the connected object or being arranged on the connected object, and then the expansion body is buried in the connecting hole of the connecting object, and the screw is twisted through the docking groove at either end of the docking screw to move from the expansion body toward the connecting piece. Under the action of the lower side wall of the screw squeezing the wall of the tapered through hole outward, the expansion body begins to deform and expand outward. Because the expansion body is composed of multiple expansion sections, it can undergo flexible deformation in some positions. The expansion section below the screw will be tightly attached to the wall of the connecting hole due to the elastic action of the elastic sheet, thereby increasing the extrusion contact area of ​​the expansion body on the wall of the connecting hole, and then better pressing the connecting hole of the connecting object to strengthen the connection between the connected object and the connecting object. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional diagram of the mechanical structure connection device provided by the utility model;

[0017] Figure 2 This is a first cross-sectional view of the mechanical structure connection device provided by the present utility model;

[0018] Figure 3 This is a second cross-sectional view of the mechanical structure connection device provided by the present invention.

[0019] The corresponding relationship between the reference numerals and component names is as follows:

[0020] 1. Connecting piece; 11. Annular protrusion; 101. Threaded through hole; 2. Expansion body; 21. Expansion section; 211. Elastic sheet; 201. Conical through hole; 202. Annular groove; 3. Screw; 31. Conical portion; 31. Columnar portion; 301. Docking groove. DETAILED DESCRIPTION

[0021] The following description of exemplary embodiments of the present invention is made in conjunction with the accompanying drawings, including various details of the embodiments of the present invention to facilitate understanding. These details should be considered as merely exemplary. Therefore, those skilled in the art will recognize that various changes and modifications may be made to the embodiments described herein without departing from the scope of the present invention. Similarly, for the sake of clarity and conciseness, descriptions of well-known functions and structures are omitted in the following description.

[0022] like Figures 1 to 3The utility model discloses mechanical structure connecting device, including: main connecting piece 1, a plurality of expansion body 2 and screw 3.

[0023] Among them, connecting piece 1 is equipped with threaded hole 101, and connecting piece 1 is connected with the connected object or is arranged on the connected object;Expansion body 2 is connected with connecting piece 1, and expansion body 2 is formed by connecting a plurality of expansion sections 21 in head-to-tail mode, expansion section 21 is equipped with elastic sheet 211, and the both ends of elastic sheet 211 are connected with adjacent expansion sections 21 respectively, a plurality of expansion bodies 2 enclose to form tapered hole 201, and the first end with small hole diameter of tapered hole 201 is connected with threaded hole 101;The upper side of screw 3 is connected with threaded hole 101 in screw thread, the lower side of screw 3 is abutted with the hole wall of tapered hole 201, and the both ends of screw 3 are equipped with butt joint groove 301, and when screw 3 moves to the direction close to connecting piece 1, expansion body 2 expands outward.

[0024] The mechanical structure connecting device of the application is integrally connected with the connected object or arranged on the connected object through connecting piece 1, so as to fix expansion body 2 connected with connecting piece 1 on the connected object, then embed expansion body 2 into the connecting hole of the connected object, twist screw 3 through the butt joint groove 301 of any end of screw 3, make screw 3 move to the direction close to connecting piece 1 from expansion body 2, under the action of the outward extrusion of the lower side wall of screw 3 to the hole wall of tapered hole 201, expansion body 2 begins to elastically deform and expand outward, so as to compress the connecting hole of the connected object, to reinforce the connection between the connected object and the connecting object, the both ends of the mechanical structure connecting device can twist screw 3 to reinforce the connection of the object, and the mechanical structure connecting device can be adjusted and fixed in complex installation space.

[0025] Through the cooperation of expansion body 2 and connecting piece 1, strong mechanical locking can be realized. When screw 3 rotates, expansion body 2 expands outward along the wall of tapered hole 201, generates extrusion force outward, makes the connection between connecting piece 1 and the connected object more stable, avoids the problems of loosening or falling off caused by too large load. The elastic deformation characteristics of expansion body 2 make the mechanical structure connecting device be able to uniformly distribute pressure even under high load conditions, enhance the carrying capacity of the connection part, ensure that there is no loosening phenomenon in long-term use, improve the durability and service life of connecting piece 1.

[0026] The mechanical structure connection device of the present invention can be flexibly adjusted in a narrow or complex installation space. Due to the rotationally adjustable characteristics of the screw 3, the user can still easily adjust and fix the connector 1 even in areas that are difficult to access. It is very suitable for occasions where space is limited or difficult to operate, and improves the convenience of installation and maintenance. Compared with traditional connection methods, the mechanical structure connection device is more compact, can achieve efficient fixation in a limited space, and adapt to more application requirements, especially in cases where multi-point fixation is required or high connection accuracy is required. The mechanical structure connection device adopts a method of rotating the screw 3 to drive the expansion body 2 to expand. It is easy to operate and can be installed without complex tools or techniques, shortening the construction and installation time and reducing labor intensity. The mechanical structure connection device of the present invention can adjust the rotation direction and force of the screw 3 according to actual needs, adapt to different installation requirements, so that it can provide reliable and precise fixing effects in a variety of different scenarios, and is suitable for multiple fields such as machinery and construction.

[0027] The mechanical structure connection device of the present invention can not only meet general fixing requirements, but also meet the installation requirements in special environments. Whether it is a complex mechanical structure or a narrow building space, the mechanical structure connection device can provide an efficient fixing effect.

[0028] Specifically, the diameter of the connector 1 is equivalent to the diameter of the hole of the connected object, and the expansion body 2 is connected to the connector 1, and its material is an elastic material. The expansion body 2 is composed of four structures of the same shape, and its distribution angle is 90°; multiple expansion bodies 2 enclose a conical through hole 201, and the exterior enclosed by the multiple expansion bodies 2 is circular, and the diameter enclosed by the multiple expansion bodies 2 is equivalent to the diameter of the hole of the connected object. Under the action of the outward extrusion force, the expansion body 2 begins to undergo elastic deformation and expand outward, thereby pressing the hole of the connected object and playing a role in connection and fixing. When the outward extrusion force is reduced, the expansion body 2 is elastically reset, which is convenient for removal.

[0029] Specifically, the upper end portion of the connector 1 can be increased in cross-section or have a connection hole added as needed, or can be directly processed and formed as part of the main body of the connected object. When the connector 1 is connected to the connected object, a threaded hole or other type of hole can be added to the upper end surface of the connector 1 and then fixed with other screws; other screws that match the connector 1 can be used for connection and fixation. The lower portion of the threaded through hole 101 of the connector 1 is used for threaded connection with the adjustable screws 3 at both ends, and the upper portion of the threaded hole can be connected with other screws.

[0030] like Figure 1 and Figure 2As shown, in an optional embodiment of the present invention, a gap is left between two adjacent expansion bodies 2, and the gap is connected to the tapered through hole 201. By leaving a gap between adjacent expansion bodies 2, friction and resistance can be effectively reduced during the outward expansion process, so that the expansion body 2 moves more smoothly in the hole of the connected object, which helps the expansion body 2 to better adapt to the shape of the hole wall during initial installation, ensuring uniform force and stability during the connection process. Since the gap is connected to the tapered through hole 201, the tapered portion 31 better transmits pressure to the expansion body 2, and the load can be more evenly distributed between adjacent expansion bodies 2. The expansion bodies 2 can work together when subjected to force, thereby enhancing the load-bearing capacity of the entire mechanical structure connection device and avoiding connection failure or loosening due to local overload. The setting of the gap allows the expansion body 2 to have a certain elastic deformation space when subjected to force, which can better absorb external vibration or impact, so that the mechanical structure connection device can effectively reduce stress concentration under vibration or impact load, and improve seismic performance and stability.

[0031] The gaps between adjacent expansion bodies 2 allow the expansion bodies 2 to more flexibly adapt to different installation environments and hole wall configurations. This allows users to more easily adjust the displacement and tightening force of the expansion bodies 2 during installation, simplifying the installation and adjustment process and improving operational convenience. The gaps between the expansion bodies 2 reduce deformation and friction between the expansion bodies 2, thereby reducing wear and damage to the material surface, extending the service life of the mechanical structure connection device and reducing maintenance costs during long-term use.

[0032] Specifically, the expansion body 2 is composed of four arc-shaped plates of the same shape, and the central angle of the arc-shaped plates is 90 degrees. The expansion body 2 and the connecting member 1 are integrally formed.

[0033] like Figure 1 and Figure 2 As shown, in an optional embodiment of the present invention, an annular groove 202 is provided at the connection between the connecting member 1 and the expansion body 2 , and the annular groove 202 is located between the threaded through hole 101 and the tapered through hole 201 .

[0034] By providing an annular groove 202 at the connection between the connector 1 and the expansion body 2, not only does it increase the mobility of the expansion body 2 and facilitate its outward expansion, it also helps to evenly distribute the stress applied to the expansion body 2 during the connection process, avoiding damage or loosening of the connector 1 due to local stress concentration, and helping to improve the overall stability and load-bearing capacity of the mechanical structure connection device. The annular groove 202 can play a positioning role during the installation process, making the connection between the connector 1 and the expansion body 2 more precise and stable, reducing errors during installation, and ensuring efficient installation and long-term stable operation of the mechanical structure connection device. By providing the annular groove 202, the contact state of the connection part can be improved, and the direct friction between the connecting parts can be reduced, thereby reducing wear and extending the service life of the mechanical structure connection device. In addition, the annular groove 202 can also help disperse the load, further reducing wear during long-term use. The presence of the annular groove 202 can provide a certain amount of elastic buffer space. When the connector 1 is subjected to external vibration or impact, it can effectively disperse stress, reduce the impact of external forces on the mechanical structure connection device, and improve the seismic resistance and stability of the connector 1 under dynamic loads. The annular groove 202 makes it easier to adjust and maintain the connection between the connector 1 and the expansion body 2. If the connection becomes loose or aged, the annular groove 202 provides a certain adjustment space, facilitating subsequent maintenance and repair, and reducing maintenance costs.

[0035] Specifically, an annular groove 202 is provided on the inner wall and the outer wall of the connection between the connecting member 1 and the expansion body 2 .

[0036] like Figure 1 and Figure 2 As shown, in an optional embodiment of the present invention, the screw 3 includes a conical portion 31 and a threaded cylindrical portion 31, the cylindrical portion 31 is threadedly connected to the threaded through hole 101, the first end of the conical portion 31 with the smallest diameter is connected to the cylindrical portion 31, the conical portion 31 is located at the conical through hole 201, and at least part of the side surface of the conical portion 31 is against the wall of the conical through hole 201.

[0037] The contact between the conical portion 31 and the wall of the conical through hole 201 provides additional positioning and support, ensuring that the screw 3 can apply pressure evenly when tightening, avoiding loosening or deformation of the expansion body 2 due to uneven tightening, making the connection more stable, especially under dynamic load or vibration environment, and better maintaining the stability of the connection. The abutting contact between the conical portion 31 and the wall of the conical through hole 201 can effectively disperse the pressure of external impact force or vibration transmitted to the connection part, reduce the impact of vibration on the mechanical structure connection device, and have better shock resistance when subjected to external force impact, and are particularly suitable for use in application scenarios with high vibration or frequent movement. The contact between the conical portion 31 and the conical through hole 201 can effectively seal the connection part, reduce the penetration of air, moisture or other external substances, and improve the sealing of the connection. It is particularly suitable for applications with high protection requirements, such as waterproof, dustproof or corrosion-resistant fields.

[0038] Through the conical portion 31 and the cylindrical portion 31 of the screw 3, the applied load can be distributed more evenly during connection, reducing local stress concentration, helping to improve the durability and load-bearing capacity of the mechanical structure connection device, especially under high load or complex stress environments, and effectively preventing structural failure. The conical portion 31 and the conical through-hole 201 make the installation and removal of the screw 3 easier. During installation, the screw 3 can be guided to the correct position by the conical portion 31, avoiding alignment errors; and during removal, the structure of the conical portion 31 makes it easier to loosen and remove the screw 3, facilitating subsequent maintenance and replacement. The close fit between the conical portion 31 and the conical through-hole 201, while preventing leakage and improving sealing, also helps to enhance the integrity of the overall structure, making the connecting components more tightly fitted, and effectively improving the durability and reliability of the entire mechanical mechanism. Specifically, the conical portion 31 and the cylindrical portion 31 are integrally formed.

[0039] like Figure 2 As shown, in an optional embodiment of the present invention, the expansion body is composed of a first expansion segment, a second expansion segment, and a third expansion segment of decreasing length. The first expansion segment, the second expansion segment, and the third expansion segment are connected in sequence. The first expansion segment is connected to the connecting member. The length of the first expansion segment is: d1 = H*(d2+d3) / R; where d1 is the length of the first expansion segment, d2 is the length of the second expansion segment, d3 is the length of the third expansion segment, H is the height of the tapered portion, and R is the maximum radius of the tapered portion. By making the length d1 of the first expansion segment positively correlated with the slope of the tapered portion, even when the slope of the tapered portion is high, the first expansion segment has sufficient length to squeeze the wall of the connecting hole to strengthen the connection.

[0040] like Figure 1 and Figure 2As shown, in an optional embodiment of the present invention, the second end of the tapered portion 31 with the largest diameter passes through the end of the tapered through hole 201 and extends outward. The diameter of the second end of the tapered portion 31 is greater than the maximum inner diameter of the tapered through hole 201 and smaller than the outer diameter of the connector 1. By making the second end of the tapered portion 31 larger than the maximum inner diameter of the tapered through hole 201, it not only helps the tapered portion 31 squeeze the expansion body 2 to expand outward, but also effectively seals the connection to prevent foreign matter from entering, thereby improving the protective capability of the connection. Because the tapered portion 31 at the second end fits tightly with the tapered through hole 201, it can effectively reduce the gap between the components, further improving the stability of the connection and avoiding loosening problems.

[0041] like Figure 2 As shown, in an optional embodiment of the present invention, the expansion body 2 is formed by connecting multiple expansion segments 21 of different lengths end to end, with the expansion segments 21 gradually increasing in length as they approach the connector 1. By gradually increasing the length of the expansion segments 21 as they approach the connector 1, the displacement of the expansion segments 21 toward the wall of the connecting hole of the connected object increases as the screw moves closer to the connector, thereby better adapting to connecting holes of different diameters.

[0042] like Figure 2 As shown, in an optional embodiment of the present invention, the inclination of the side surface of the tapered portion 31 is less than the inclination of the wall of the tapered through hole 201. By controlling the inclination of the side surface of the tapered portion 31 to be less than the inclination of the wall of the tapered through hole 201, the stress of the expansion body 2 can be concentrated during the force-bearing process, which helps the expansion body 2 to expand and move outward quickly. Due to the setting of the inclination, the stress concentration makes the contact between the tapered portion 31 and the tapered through hole 201 closer, which can provide better sealing performance, help prevent foreign substances such as moisture, dust, oil, etc. from entering the connection part, improve the protection ability of the connection, thereby ensuring the normal operation of the equipment or system, and is particularly suitable for application scenarios that require high sealing performance.

[0043] By making the side inclination angle a of the tapered portion 31 smaller than the inclination angle b of the wall of the tapered through hole 201, the mechanical structure connection device is easier to separate when it needs to be disassembled. The smaller inclination helps to reduce the jamming phenomenon during the disassembly process, making the disassembly operation smoother and faster, reducing the difficulty of disassembly and maintenance, improving maintenance efficiency, and reducing the damage that may be caused by difficult disassembly. Since the fit between the tapered portion 31 and the tapered through hole 201 is more precise and uniform, better mechanical properties can be achieved, ensuring that the connecting components can evenly distribute stress when subjected to load, improving load-bearing capacity, reducing deformation or damage to the connection parts caused by excessive local stress, and improving the reliability and safety of the mechanical structure connection device. The smaller inclination of the side of the tapered portion 31 can effectively reduce the friction between the two parts during assembly and use. The smaller inclination means that the contact surface is smoother, friction is reduced, and wear caused by friction is reduced. This is of great significance for the long-term use and disassembly of the connector 1, and can effectively avoid component damage or connection failure caused by wear.

[0044] like Figure 3 As shown, in an optional embodiment of the present invention, an annular protrusion 11 is provided on the side of the connecting member 1. The annular protrusion 11 is located at the end of the threaded through hole 101 and is provided with a threaded hole.

[0045] A threaded connection is made through a threaded hole to fix the connection between the connector 1 and the connected object. The annular protrusion 11 is located at the end of the threaded through hole 101, which helps to provide additional positioning support when the connector 1 is assembled on the connected object, and can effectively prevent the connector 1 from slipping or displacing during use, thereby improving the stability and reliability of the overall connection. The annular protrusion 11 can provide additional contact pressure at the connection part and improve the sealing of the hole at the connection part. By forming a closed contact surface at the end of the threaded through hole 101, it helps to prevent external substances such as water, dust, oil, etc. from entering the connection part, thereby protecting internal components from contamination or damage, and ensuring the good performance of the mechanical structure connection device in various environments. The provision of the threaded hole can make the installation process easier. During installation, the connector 1 can be quickly and accurately connected to the connection object through the threaded hole, thereby reducing installation time and operational complexity and improving assembly efficiency. The annular protrusion 11 and the threaded hole can provide stronger connection strength. During the installation process of the connector 1, the threaded hole can better distribute the load and enhance the tensile strength and shear resistance of the connection part. Especially when subjected to large external forces or vibrations, it can effectively improve the tensile strength of the connection and reduce the risk of connection failure caused by uneven force.

[0046] like Figure 2 and Figure 3As shown, in an optional embodiment of the present invention, the docking groove 301 is a hexagonal groove. By setting the docking groove 301 as a hexagonal groove, the hexagonal shape can provide more stable docking and tightening compared to circular or square notches, and the six planes can more evenly distribute the external force, thereby reducing the risk of slippage and loosening, and improving the stability and reliability of the connection. The hexagonal groove can effectively increase the contact area of ​​the screw 3 and improve the torque resistance of the connection part. Under stress, the hexagonal notch can provide greater friction to prevent the connector 1 from loosening or deforming due to excessive torque, and is particularly suitable for connection occasions that need to withstand large rotational torque. The shape of the hexagonal groove enables the connector 1 to have a strong self-alignment ability during installation, reducing the operator's precise requirements for position and direction. In addition, fastening can be performed quickly and conveniently using a hexagonal wrench, which simplifies the installation process and improves assembly efficiency. The structure of the hexagonal groove can provide more precise docking fit.

[0047] Since the hexagonal docking groove 301 usually has a higher processing accuracy, it can ensure that the connector 1 is docked more accurately during the installation process, thereby improving the overall quality and reliability of the connection. Compared with other shapes, the polygonal structure of the hexagonal groove can provide a larger contact area during the connection process, increase the friction during the connection, thereby effectively improving the anti-loosening performance and preventing the connection parts from loosening due to vibration or other factors. Since the fasteners that match the hexagonal groove are usually operated with hexagonal tools, such as hexagonal wrenches, this makes disassembly and maintenance easier and more efficient. The hexagonal docking groove 301 notch can effectively avoid damage caused by tool slippage during disassembly, reduce maintenance difficulty, and improve maintenance efficiency.

[0048] In an optional embodiment of the present invention, the docking groove 301 is a cross slot or a slotted slot. By setting the docking groove 301 as a cross slot or a slotted slot, the screw 3 has a high self-alignment during installation, which simplifies the assembly process. Due to the shape of the slot, the screw 3 can be easily docked with the corresponding docking component, which reduces the requirements for operating accuracy and improves assembly efficiency. The cross slot or the slotted slot can usually be operated with common tools, such as a cross screwdriver or a slotted screwdriver. The versatility and popularity of the tools make the installation and disassembly process more convenient, help reduce the difficulty of equipment maintenance and installation, and are suitable for large-scale production and maintenance operations. The cross slot or the slotted slot can provide a reliable docking fit, ensuring a firm fixation between the screw 3 connecting parts, especially under the action of torque, the cross slot or the slotted slot can effectively transfer the applied force to the contact surface of the expansion body 2, reducing the risk of loosening due to loose or offset connection. The cross slot or the slotted slot can provide a larger contact area, increase friction, thereby improving the anti-loosening ability of the connection, and facilitate alignment in complex and limited spaces. Especially under conditions of vibration or long-term use, it can effectively prevent the connector 1 from loosening or falling off due to external forces, thereby enhancing the reliability of the mechanical structure connection device.

[0049] Due to the simple shape of the cross slot or the slotted slot, it is easy to manufacture through conventional processing methods, such as lathes, milling machines, etc. Compared with complex geometric shapes, it can reduce the manufacturing process and production costs, help improve production efficiency and reduce overall costs. The cross slot and the slotted slot are suitable for various connection occasions and can be used in conjunction with most standard connectors1, with strong adaptability. Whether it is a small mechanical device or a large equipment, this slot can be used to meet the needs of various industries. Due to the universality of the cross slot or the slotted slot, common tools can easily achieve disassembly and maintenance, reducing the maintenance time caused by the difficulty of disassembly, improving the maintainability of the equipment, and facilitating daily inspection, maintenance and troubleshooting.

[0050] In an optional embodiment of the present invention, the expansion body 2 is made of an elastic material. By making the expansion body 2 of an elastic material, the expansion body 2 has good elasticity and deformability, and the expansion body 2 can adapt to different connection conditions, thereby enhancing the stability and reliability of the mechanical structure connection device. The elastic material can effectively absorb the impact and vibration applied by the outside world, reduce the pressure transmitted to the mechanical structure connection device, and help extend the service life of the structure. The elastic material can provide a better sealing effect during the connection process, prevent the entry of external impurities, dust, etc., and improve the sealing and durability of the connection components. The elastic material has strong adaptability and can maintain its performance in a wide temperature range and under different environmental conditions, and is suitable for a variety of complex working environments. Due to the deformable characteristics of the elastic material, the expansion body 2 can more conveniently enter the hole of the connected object during installation, simplifying the installation process and improving work efficiency. By loosening the screw 3, the outward extrusion force of the conical part 31 of the screw 3 is reduced, and the expansion part is elastically reset, thereby facilitating the removal of the mechanical structure connection device.

[0051] It should be understood that the various forms of the processes shown above can be used to reorder, add, or delete steps. For example, the steps described in this utility model can be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution disclosed in this utility model can be achieved. This is not limited herein.

[0052] The above specific embodiments do not limit the scope of protection of this utility model. Those skilled in the art will understand that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the principles of this utility model shall be included within the scope of protection of this utility model.

Claims

1. A mechanical structure connection device, characterized in that: include: A connecting piece, wherein the connecting piece is provided with a threaded through hole; A plurality of expansion bodies, each of which is connected to the connector. The expansion body is formed by connecting a plurality of expansion segments end to end. The expansion segments are provided with elastic sheets, and the ends of the elastic sheets are respectively connected to adjacent expansion segments. The plurality of expansion bodies enclose a tapered through hole, and the first end of the tapered through hole with a smaller aperture is connected to the threaded through hole. A screw, wherein the upper side of the screw is threadedly connected to the threaded through hole, the lower side of the screw is against the wall of the tapered through hole, and docking grooves are provided at both ends of the screw. When the screw moves toward the connecting piece, the expansion body expands outward.

2. The mechanical structure connection device according to claim 1, characterized in that: The expansion body is formed by connecting a plurality of expansion segments of different lengths end to end, and the lengths of the plurality of expansion segments gradually increase in a direction approaching the connecting member.

3. The mechanical structure connection device according to claim 2, characterized in that: The screw includes a conical portion and a threaded cylindrical portion, the cylindrical portion is threadedly connected to the threaded through hole, the first end of the conical portion with the smallest diameter is connected to the cylindrical portion, the conical portion is located at the conical through hole, and at least part of the side surface of the conical portion is against the wall of the conical through hole.

4. The mechanical structure connection device according to claim 3, characterized in that: The expansion body consists of a first expansion segment, a second expansion segment, and a third expansion segment of decreasing lengths in sequence, the first expansion segment, the second expansion segment, and the third expansion segment are connected in sequence, the first expansion segment is connected to the connecting member, and the length of the first expansion segment is: d1 = H*(d2+d3) / R; Wherein, d1 is the length of the first expansion section, d2 is the length of the second expansion section, d3 is the length of the third expansion section, H is the height of the tapered portion, and R is the maximum radius of the tapered portion.

5. The mechanical structure connection device according to claim 3, characterized in that: The second end of the tapered portion with the largest diameter passes through the tapered through hole port and extends outward. The diameter of the second end of the tapered portion is larger than the maximum inner diameter of the tapered through hole and smaller than the outer diameter of the connecting piece.

6. The mechanical structure connection device according to claim 1, characterized in that: A gap is left between two adjacent expansion bodies, and the gap is communicated with the tapered through hole.

7. The mechanical structure connecting device according to claim 1, characterized in that: An annular groove is provided at the connection between the connecting piece and the expansion body, and the annular groove is located between the threaded through hole and the tapered through hole.

8. The mechanical structure connecting device according to claim 1, characterized in that: An annular protrusion is provided on the side of the connecting piece, the annular protrusion is located at the end of the threaded through hole, and the annular protrusion is provided with a threaded hole.

9. The mechanical structure connection device according to claim 1, characterized in that: The docking groove is a hexagonal groove.

10. The mechanical structure connecting device according to claim 1, characterized in that: The expansion body is made of elastic material.

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