Double-buckle type double-spliced connecting piece

Abstract

The utility model relates to the technical field of bearing plates, in particular to a double-buckle type double-spliced connecting piece which comprises an upper-layer plate and a lower-layer plate which are symmetrical to each other and attached to each other, and further comprises a rolling mechanism used for enabling the upper-layer plate and the lower-layer plate to achieve relative movement in the left-right direction and the front-back direction. According to the utility model, the upper-layer plate and the lower-layer plate can be stably connected quickly and conveniently, so that the mounting efficiency between the upper-layer plate and the lower-layer plate is effectively improved, and the upper-layer plate and the lower-layer plate with different sizes can be flexibly connected and matched by replacing different connecting pieces; therefore, the flexibility and applicability of the whole structure are effectively improved, in addition, when the upper-layer plate and the lower-layer plate shake due to an earthquake, the upper-layer plate and the lower-layer plate can be allowed to move relatively in the left-right direction and the front-back direction, and then the overall stability and safety of the double-spliced connecting piece are improved.

Description

Technical Field

[0001] This utility model relates to the field of load-bearing plate technology, and in particular to a double-locking double-joint connector. Background Technology

[0002] Load-bearing slabs, also known as floor decking, composite floor slabs, floor panels, or steel decking, have many advantages, such as light weight, high strength, and high rigidity. Most existing load-bearing slab designs are based on a fundamental principle: when a heavy object is placed on the load-bearing slab, the friction between the load-bearing slab and the ground increases due to the weight of the object itself. This ensures that the object remains stably on the load-bearing slab when stationary, preventing it from slipping or moving, thus achieving stable support for the heavy object.

[0003] However, the situation changes when encountering natural disasters such as earthquakes. The strong vibrations and shaking caused by an earthquake will cause the load-bearing plate and the heavy objects on it to be subjected to dynamic forces. At this time, the heavy objects on the load-bearing plate are prone to relative displacement due to inertia. If this displacement exceeds the limit of the friction between the load-bearing plate and the ground, the heavy objects may fall off the load-bearing plate. To solve this problem, most existing load-bearing plates adopt a double-layer design. This design usually requires connectors to ensure the stability and integrity between the upper and lower load-bearing plates. The existing connectors have a relatively simple structure and lack sufficient adaptability and flexibility. This may lead to the connectors being unable to effectively transmit or disperse the dynamic forces generated by the earthquake in certain specific situations. Moreover, most existing connectors are fixed to the two load-bearing plates with bolts. This installation method is relatively troublesome, thereby reducing installation efficiency and poor practicality. Utility Model Content

[0004] The purpose of this utility model is to solve the problem of simple structure and troublesome installation of connectors on double-layer load-bearing plates in the prior art, and to propose a double-buckle double-joint connector.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A double-locking, double-jointed connector includes an upper plate and a lower plate, the upper and lower plates being symmetrical and fitted together, and further comprising:

[0007] A rolling mechanism is used to enable relative movement between the upper and lower plates in the left-right and front-back directions;

[0008] Four sets of movable connection mechanisms are installed symmetrically in pairs on both sides of the upper and lower plates. Each movable connection mechanism includes two sets of connectors and four sets of sliding grooves. The four sets of sliding grooves are symmetrically located at the top of the upper plate and the bottom of the lower plate. Fixed plates are slidably connected to the two sets of sliding grooves on the upper plate and the two sets of sliding grooves on the lower plate. Fixed strips are installed on both sets of fixed plates, and plug-in components are connected to both sets of fixed plates through the fixed strips. The opposite ends of the two sets of connectors are rotatably connected to a rotating shaft, and limit grooves are opened on the outward side of the two sets of connectors. The two sets of connectors are connected to the two sets of plug-in components through the limit grooves.

[0009] Preferably, the rolling mechanism includes four sets of concave discs, which are symmetrically fixed in pairs at the bottom wall of the upper plate near both ends and the top wall of the lower plate near both ends. A set of rolling balls is placed between the two sets of concave discs on the upper plate and the two sets of concave discs on the lower plate, and the outer wall of the rolling balls is in contact with the inner wall of the concave discs on the upper plate and the lower plate, respectively.

[0010] Preferably, the insertion assembly includes a rotating groove, a limiting ring, and a pulling shell. The rotating groove is disposed through the fixing strip. The limiting ring is fixedly installed inside the rotating groove, and a rubber toothed ring is fixedly connected to the outer side of the limiting ring. A protruding ring is installed on the outer side of the fixing strip. Multiple sets of extrusion grooves are evenly formed on the outer side of the protrusion ring. Each set of extrusion grooves has a first retaining groove on its sidewall near the fixing strip. Multiple sets of first limiting posts and multiple sets of second limiting posts are installed on the pulling shell. The ends of the multiple sets of first limiting posts away from the pulling shell pass through the multiple sets of extrusion grooves and are inserted into the multiple sets of extrusion grooves. Inside the first slot, a reset component is provided on the first limiting post to reset the first limiting post within the extrusion groove. A rotating component is inserted through the pull shell, and a friction ring is fixedly connected to the inward end of the rotating component. Multiple sets of second slots are opened on the outward side of the friction ring, and the friction ring is interlocked with multiple sets of second limiting posts on the pull shell through the multiple sets of second slots. An insert rod is fixedly connected to the inward side of the friction ring, and the inward end of the insert rod passes through the rubber toothed ring and the limiting ring in sequence, and is inserted into the corresponding limiting groove. A limiting component is provided on the insert rod to prevent it from falling out of the limiting groove.

[0011] Preferably, the reset component includes a stop block, which is installed on the side wall of the first limiting post and is located in the extrusion groove. The outer wall of the stop block is in contact with the inner wall of the extrusion groove, and a spring is fixedly connected to the outward side of the stop block. The end of the spring away from the stop block is fixedly connected to the inner wall of the extrusion groove, and the spring is sleeved on the first limiting post.

[0012] Preferably, the limiting component includes two sets of locking blocks, which are symmetrically installed on the outer wall of the insertion rod. Grooves are provided on the top and bottom walls of the limiting groove, and the two sets of locking blocks are engaged in the two sets of grooves.

[0013] Preferably, the friction ring is fitted with the rubber toothed ring, and the friction ring is made of rubber.

[0014] Compared with the prior art, the advantages of this utility model are:

[0015] 1. This utility model, through the setting of connectors and plug-in components in the movable connection mechanism, enables a quick and convenient stable connection between the upper and lower plates, thereby effectively improving the installation efficiency between the upper and lower plates. Furthermore, the movable connection mechanism allows for flexible connection and adaptation between upper and lower plates of different sizes by replacing different connectors, thus effectively improving the flexibility and applicability of the entire structure. In addition, the sliding setting of the fixed plate within the sliding groove and the rotation axis between the two sets of connectors allow for relative movement between the upper and lower plates in the left-right and front-back directions when the upper and lower plates shake due to an earthquake. This relative movement absorbs and disperses the energy generated by the earthquake, significantly reducing the risk of heavy objects falling from the double-panel connector, thereby improving the overall stability and safety of the double-panel connector.

[0016] 2. This utility model, through the setting of a rolling mechanism between the upper and lower plates, can reduce the friction between the upper and lower plates when they shake due to an earthquake by using the rolling of the rolling balls. This allows the upper and lower plates to move more smoothly relative to each other, thereby more effectively absorbing and dispersing the energy generated by the earthquake. Furthermore, since the rolling friction of the rolling balls has a lower wear rate than sliding friction (referring to the direct contact friction between the upper and lower plates), it effectively extends the service life of the upper and lower plates. Attached Figure Description

[0017] Figure 1 This is a side view of a double-buckle double-joint connector proposed in this utility model.

[0018] Figure 2 This is a schematic diagram of the interlocking structure of the upper and lower plates of a double-locking double-joint connector proposed in this utility model.

[0019] Figure 3 This is a schematic diagram of the interlocking structure of the connector and the limiting groove of the double-locking double-joint connector proposed in this utility model;

[0020] Figure 4This is a schematic diagram of the structure in which the pull shell and the fixing strip of the double-buckle double-joint connector cooperate with each other, as proposed in this utility model.

[0021] Figure 5 for Figure 4 Enlarged structural diagram at point A in the middle;

[0022] Figure 6 This is a schematic diagram of the structure in which the first slot and the extrusion slot of a double-locking double-joint connector cooperate with each other, as proposed in this utility model.

[0023] In the diagram: 1. Upper plate; 2. Lower plate; 3. Concave disc; 4. Ball bearing; 5. Fixing plate; 6. Fixing strip; 7. Rotating component; 8. Friction ring; 9. Locking block; 10. Limiting ring; 11. First locking groove; 12. Extrusion groove; 13. Spring; 14. First limiting post; 15. Pulling shell; 16. Second limiting post; 17. Second locking groove; 18. Connecting component; 19. Limiting groove; 20. Sliding groove; 21. Rotating shaft. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] Reference Figures 1 to 2 A double-locking double-joint connector includes an upper plate 1 and a lower plate 2, which are symmetrical and fit together. A rolling mechanism is provided on both the upper plate 1 and the lower plate 2 to enable relative movement of the upper plate 1 and the lower plate 2 in the left-right and front-back directions. The rolling mechanism includes four sets of concave discs 3, which are fixedly installed in pairs symmetrically at the bottom wall of the upper plate 1 near the two ends and the top wall of the lower plate 2 near the two ends. A set of rolling balls 4 is placed between the two sets of concave discs 3 on the upper plate 1 and the two sets of concave discs 3 on the lower plate 2. The outer wall of the rolling balls 4 is in contact with the inner wall of the concave discs 3 on the upper plate 1 and the lower plate 2, respectively.

[0026] When it is necessary to install the upper plate 1 and the lower plate 2, the upper plate 1 and the lower plate 2 are first attached together. A concave plate 3 is installed in the upper plate 1 and the lower plate 2. A rolling ball 4 is placed in the middle of the concave plate 3, which can limit the two concave plates 3. When the upper plate 1 and the lower plate 2 shake due to external factors (such as an earthquake), the rolling ball 4 will roll in the concave plate 3.

[0027] Reference Figures 1 to 4Four sets of movable connecting mechanisms are installed on both sides of the upper plate 1 and the lower plate 2 to maintain the connection between them during relative movement. Since the four sets of movable connecting mechanisms are installed on both sides of the upper plate 1 and the lower plate 2, this layout ensures that the upper plate 1 and the lower plate 2 remain synchronized and coordinated during relative movement, thus maintaining their overall balance and stability. This ensures that the weight on the double-panel connector remains balanced and stable, preventing tilting or falling. The movable connecting mechanism includes two sets of connectors 18 and four... Four sets of sliding grooves 20 are symmetrically arranged in pairs at the top of the upper plate 1 and the bottom of the lower plate 2. Fixed plates 5 are slidably connected to the two sets of sliding grooves 20 on the upper plate 1 and the two sets of sliding grooves 20 on the lower plate 2. Fixed strips 6 are installed on the two sets of fixed plates 5, and plug-in components are connected to the two sets of fixed plates 5 through the fixed strips 6. The opposite ends of the two sets of connectors 18 are rotatably connected to the rotating shaft 21, and limit grooves 19 are opened on the outward side of the two sets of connectors 18. The two sets of connectors 18 are connected to the two sets of plug-in components through the limit grooves 19.

[0028] Reference Figures 3 to 6The plug-in assembly includes a rotating groove, a limiting ring 10, and a pulling shell 15. The rotating groove is disposed through the fixing strip 6. The limiting ring 10 is fixedly installed inside the rotating groove, and a rubber toothed ring is fixedly connected to the outer side of the limiting ring 10. A convex ring is installed on the outer side of the fixing strip 6. Multiple sets of extrusion grooves 12 are evenly opened on the outer side of the convex ring. A first slot 11 is opened on the side wall of the multiple sets of extrusion grooves 12 near the fixing strip 6. Multiple sets of first limiting posts 14 and multiple sets of second limiting posts 15 are installed on the pulling shell 15. 6. Multiple sets of first limiting posts 14, with their ends away from the pulling shell 15, pass through multiple sets of extrusion grooves 12 and are inserted into the first slots 11 within the extrusion grooves 12. Each first limiting post 14 is equipped with a reset component to reset it within the extrusion groove 12. The reset component includes a stop block, which is mounted on the side wall of the first limiting post 14 and located within the extrusion groove 12. The outer wall of the stop block is in contact with the inner wall of the extrusion groove 12, and a spring 13 is fixedly connected to the outward-facing side of the stop block. The end furthest from the abutment block is fixedly connected to the inner wall of the extrusion groove 12, and the spring 13 is sleeved on the first limiting post 14. A rotating component 7 is inserted through the pull shell 15, and a friction ring 8 is fixedly connected to the inward end of the rotating component 7. Multiple sets of second slots 17 are opened on the outward side of the friction ring 8, and the friction ring 8 is interlocked with multiple sets of second limiting posts 16 on the pull shell 15 through the multiple sets of second slots 17. The friction ring 8 fits against the rubber toothed ring, and the friction ring 8 is made of rubber. The setting of the friction ring 8 being made of rubber can... To reduce wear between the friction ring 8 and the rubber toothed ring during rotation, a rod is fixedly connected to the inward side of the friction ring 8. The inward end of the rod passes through the rubber toothed ring and the limiting ring 10 in sequence and is inserted into the corresponding limiting groove 19. A limiting component is provided on the rod to prevent it from falling out of the limiting groove 19. The limiting component includes two sets of locking blocks 9, which are symmetrically installed on the outer wall of the rod. Grooves are provided on the top and bottom walls of the limiting groove 19, and the two sets of locking blocks 9 are engaged in the two sets of grooves.

[0029] After the upper plate 1 and the lower plate 2 are attached, insert the rod on the fixing strip 6 into the limiting groove 19 in the connector 18, and then pull the pulling shell 15 outward. At this time, the pulling shell 15 will drive the first limiting post 14 and the second limiting post 16 to move outward, so that the first limiting post 14 and the second limiting post 16 are respectively disengaged from the first slot 11 and the second slot 17. At this time, the end of the first limiting post 14 is located in the compression groove 12, and the spring 13 is in a compressed state under the action of the abutment on the first limiting post 14. After the first limiting post 14 and the second limiting post 16 are disengaged from the first slot 11 and the second slot 17, start to rotate the rotating part 7 clockwise. The rotation of the rotating part 7 drives the rod to rotate until the two sets of locking blocks 9 on the rod are rotated into the two sets of grooves on the limiting groove 19. When the rotating part 7 rotates, the friction ring 8 will rub against the rubber toothed ring on the fixing strip 6, so that the rotating part 7 will not wobble much after being positioned.

[0030] Once rotated to the correct position, releasing the pull shell 15 causes the spring 13 to rebound due to its elasticity, which in turn causes the entire pull shell 15 to rebound, allowing the first limiting post 14 and the second limiting post 16 to re-enter the first slot 11 and the second slot 17. At this point, the rotating part 7 cannot rotate, thus limiting the rotation of the rotating part 7. This allows the locking block 9 on the insertion rod to be stably engaged in the groove on the limiting groove 19 (i.e., the insertion rod is stably fixed in the limiting groove 19). This double-locking design of rotation and engagement allows the upper plate 1 and the lower plate 2 to achieve a stable connection quickly and easily, thereby effectively improving the installation efficiency between the upper plate 1 and the lower plate 2. At the same time, this bidirectional splicing design allows for flexible connection and adaptation between upper plates 1 and lower plates 2 of different sizes by replacing different connectors 18, thereby effectively improving the flexibility and applicability of the entire structure.

[0031] When the upper plate 1 and lower plate 2 shake due to an earthquake, friction occurs between them. Because the fixed plate 5 is slidably connected within the sliding groove 20 on the upper plate 1 and lower plate 2, the upper plate 1 and lower plate 2 can move relative to each other in the front-to-back direction. Simultaneously, due to the rotating shaft 21 between the two sets of connecting parts 18, the upper plate 1 and lower plate 2 can move relative to each other in the left-to-right direction. This design, which allows for a certain degree of relative movement between the upper plate 1 and lower plate 2, absorbs and disperses the energy generated by the earthquake, thereby significantly reducing the impact of the earthquake. The risk of objects falling off the double-panel connector is reduced, thereby improving the overall stability and safety of the double-panel connector. The rolling ball 4 between the upper plate 1 and the lower plate 2 can reduce the friction between the upper plate 1 and the lower plate 2 (so that the upper plate 1 and the lower plate 2 can move more smoothly relative to each other), thus more effectively absorbing and dispersing the energy generated by the earthquake. Moreover, since the rolling friction of the rolling ball 4 has a lower wear rate than sliding friction (referring to the direct contact friction between the upper plate and the lower plate), it effectively extends the service life of the upper plate 1 and the lower plate 2.

[0032] In this utility model, the double-panel connector is used for load-bearing. When it is necessary to install the upper plate 1 and the lower plate 2, the upper plate 1 and the lower plate 2 are first attached together. A concave plate 3 is installed in the upper plate 1 and the lower plate 2. A rolling ball 4 is placed in the middle of the concave plate 3, which can limit the upper and lower concave plates 3. When the upper plate 1 and the lower plate 2 shake due to external factors (such as an earthquake), the rolling ball 4 will roll in the concave plate 3.

[0033] After the upper plate 1 and the lower plate 2 are attached, insert the rod on the fixing strip 6 into the limiting groove 19 in the connector 18, and then pull the pulling shell 15 outward. At this time, the pulling shell 15 will drive the first limiting post 14 and the second limiting post 16 to move outward, so that the first limiting post 14 and the second limiting post 16 are respectively disengaged from the first slot 11 and the second slot 17. At this time, the end of the first limiting post 14 is located in the compression groove 12, and the spring 13 is in a compressed state under the action of the abutment on the first limiting post 14. After the first limiting post 14 and the second limiting post 16 are disengaged from the first slot 11 and the second slot 17, start to rotate the rotating part 7 clockwise. The rotation of the rotating part 7 drives the rod to rotate until the two sets of locking blocks 9 on the rod are rotated into the two sets of grooves on the limiting groove 19. When the rotating part 7 rotates, the friction ring 8 will rub against the rubber toothed ring on the fixing strip 6, so that the rotating part 7 will not wobble much after being positioned.

[0034] Once rotated to the correct position, releasing the pull shell 15 causes the spring 13 to rebound due to its elasticity, which in turn causes the entire pull shell 15 to rebound, allowing the first limiting post 14 and the second limiting post 16 to re-enter the first slot 11 and the second slot 17. At this point, the rotating part 7 cannot rotate, thus limiting the rotation of the rotating part 7. This allows the locking block 9 on the insertion rod to be stably engaged in the groove on the limiting groove 19 (i.e., the insertion rod is stably fixed in the limiting groove 19). This double-locking design of rotation and engagement allows the upper plate 1 and the lower plate 2 to achieve a stable connection quickly and easily, thereby effectively improving the installation efficiency between the upper plate 1 and the lower plate 2. At the same time, this bidirectional splicing design allows for flexible connection and adaptation between upper plates 1 and lower plates 2 of different sizes by replacing different connectors 18, thereby effectively improving the flexibility and applicability of the entire structure.

[0035] When the upper plate 1 and lower plate 2 shake due to an earthquake, friction occurs between them. Because the fixed plate 5 is slidably connected within the sliding groove 20 on the upper plate 1 and lower plate 2, the upper plate 1 and lower plate 2 can move relative to each other in the front-to-back direction. Simultaneously, due to the rotating shaft 21 between the two sets of connecting parts 18, the upper plate 1 and lower plate 2 can move relative to each other in the left-to-right direction. This design, which allows for a certain degree of relative movement between the upper plate 1 and lower plate 2, absorbs and disperses the energy generated by the earthquake, thereby significantly reducing the impact of the earthquake. The risk of objects falling off the double-panel connector is reduced, thereby improving the overall stability and safety of the double-panel connector. The rolling ball 4 between the upper plate 1 and the lower plate 2 can reduce the friction between the upper plate 1 and the lower plate 2 (so that the upper plate 1 and the lower plate 2 can move more smoothly relative to each other), thus more effectively absorbing and dispersing the energy generated by the earthquake. Moreover, since the rolling friction of the rolling ball 4 has a lower wear rate than sliding friction (referring to the direct contact friction between the upper plate and the lower plate), it effectively extends the service life of the upper plate 1 and the lower plate 2.

[0036] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A double-locking double-joint connector, comprising an upper plate (1) and a lower plate (2), wherein the upper plate (1) and the lower plate (2) are symmetrical to each other and are fitted together, characterized in that, Also includes: A rolling mechanism is used to enable relative movement of the upper plate (1) and the lower plate (2) in the left-right and front-back directions; Four sets of movable connection mechanisms are installed symmetrically in pairs on both sides of the upper plate (1) and the lower plate (2). The movable connection mechanism includes two sets of connectors (18) and four sets of sliding grooves (20). The four sets of sliding grooves (20) are symmetrically opened in pairs at the top of the upper plate (1) and the bottom of the lower plate (2). Fixed plates (5) are slidably connected in the two sets of sliding grooves (20) on the upper plate (1) and the two sets of sliding grooves (20) on the lower plate (2). Fixed strips (6) are installed on the two sets of fixed plates (5), and plug-in components are connected to the two sets of fixed plates (5) through the fixed strips (6). The opposite ends of the two sets of connectors (18) are rotatably connected to a rotating shaft (21), and a limiting groove (19) is opened on the outward side of the two sets of connectors (18). The two sets of connectors (18) are connected to the two sets of plug-in components through the limiting grooves (19).

2. The double-locking double-joint connector according to claim 1, characterized in that, The rolling mechanism includes four sets of concave discs (3). The four sets of concave discs (3) are fixedly installed in pairs symmetrically at the bottom wall of the upper plate (1) near the two ends and at the top wall of the lower plate (2) near the two ends. A set of rolling balls (4) is placed between the two sets of concave discs (3) on the upper plate (1) and the two sets of concave discs (3) on the lower plate (2). The outer wall of the rolling ball (4) is in contact with the inner wall of the concave discs (3) on the upper plate (1) and the concave discs (3) on the lower plate (2).

3. The double-locking double-joint connector according to claim 1, characterized in that, The plug-in assembly includes a rotating groove, a limiting ring (10), and a pulling shell (15). The rotating groove is disposed through the fixing strip (6). The limiting ring (10) is fixedly installed inside the rotating groove, and a rubber toothed ring is fixedly connected to the outer side of the limiting ring (10). A convex ring is installed on the outer side of the fixing strip (6). Multiple sets of extrusion grooves (12) are evenly opened on the outer side of the convex ring. A first locking groove (11) is opened on the side wall of the multiple sets of extrusion grooves (12) near the fixing strip (6). Multiple sets of first limiting posts (14) and multiple sets of second limiting posts (16) are installed on the pulling shell (15). The ends of the multiple sets of first limiting posts (14) away from the pulling shell (15) pass through the multiple sets of extrusion grooves (12) and are inserted into the first locking grooves (16) in the multiple sets of extrusion grooves (12). Inside the groove (11), a reset component is provided on the first limiting post (14) to reset the first limiting post (14) in the extrusion groove (12). A rotating component (7) is inserted through the pull shell (15). A friction ring (8) is fixedly connected to the inward end of the rotating component (7). Multiple sets of second slots (17) are opened on the outward side of the friction ring (8), and the friction ring (8) is inserted into multiple sets of second limiting posts (16) on the pull shell (15) through multiple sets of second slots (17). A plug rod is fixedly connected to the inward side of the friction ring (8). The inward end of the plug rod passes through the rubber toothed ring and the limiting ring (10) in sequence and is inserted into the corresponding limiting groove (19). A limiting component is provided on the plug rod to prevent it from falling out of the limiting groove (19).

4. A double-locking double-joint connector according to claim 3, characterized in that, The reset component includes a stop block, which is installed on the side wall of the first limiting post (14) and located inside the extrusion groove (12). The outer wall of the stop block is in contact with the inner wall of the extrusion groove (12), and a spring (13) is fixedly connected to the outer side of the stop block. The end of the spring (13) away from the stop block is fixedly connected to the inner wall of the extrusion groove (12), and the spring (13) is sleeved on the first limiting post (14).

5. A double-locking double-joint connector according to claim 3, characterized in that, The limiting component includes two sets of locking blocks (9), which are symmetrically installed on the outer wall of the insertion rod. The top and bottom walls of the limiting groove (19) are provided with grooves, and the two sets of locking blocks (9) are engaged in the two sets of grooves.

6. A double-locking double-joint connector according to claim 3, characterized in that, The friction ring (8) is in contact with the rubber toothed ring, and the friction ring (8) is made of rubber.

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