A coupling structure and a connecting piece

Abstract

The present invention relates to the technical field of mechanical equipment, and in particular to a coupling structure and a connector, which comprises a locking assembly, comprising a connecting pipe, a locking pipe arranged on the outer wall of the connecting pipe, a coupling pipe arranged on the outer wall of the locking pipe, and a locking sleeve sleeved on the outer wall of the coupling pipe; through the close cooperation between the locking rod and the locking groove, and the self-locking mechanism of the slope, a stable and non-loose coupling connection is ensured between the connecting pipe and the coupling pipe, the locking block slides along the locking groove, and the locking state can be easily released by sliding the locking sleeve by utilizing the inclined surface of the slope. The operation is simple and quick, and the separation of the locking rod and the locking groove is realized, which is convenient for the withdrawal of the connecting pipe, and the locking block can effectively prevent the locking sleeve from sliding accidentally, thereby ensuring the safety of the connection system in the locked state.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical equipment, in particular to a coupling structure and a connecting piece. Background Art

[0002] In daily life and industrial production, connectors, as important components of mechanical equipment, automobiles, household appliances, building structures, etc., play a key role in connecting, supporting and transmitting force. However, with the increasing complexity of product functions and the diversification of usage environments, the design of traditional connectors has gradually exposed many shortcomings and cannot meet the increasingly stringent performance requirements.

[0003] Traditional connectors are prone to loosening, wear and even breakage during long-term use due to factors such as material fatigue, external impact, and temperature changes. This not only affects the normal operation of the equipment, but may also pose a safety hazard to the user. In addition, traditional connectors often lack sufficient flexibility and adaptability when dealing with the connection needs of components of different materials and sizes, resulting in complex designs and high costs.

[0004] The patent with publication number CN111442021A discloses a connecting rod connection end connection structure of a handheld lawn mower. The device completes the positioning by sliding the positioning sleeve while the main connecting rod and the extension connecting rod are threadedly connected, and the positioning part of the adjusting positioning device is inserted into the corresponding positioning recessed hole formed on the outer wall of the positioning sleeve. The main connecting rod and the extension connecting rod can be firmly connected, so that the main connecting rod and the extension connecting rod will not rotate relative to each other and are not easy to loosen, thereby achieving good effect.

[0005] However, this technical solution still has the following defects: by introducing the positioning sleeve and the adjusting positioning device, the complexity of the entire connection structure is increased, and the difficulty of assembly and maintenance is also increased; in order to ensure that the positioning part can be accurately inserted into the positioning recess, very high processing accuracy is required for the positioning sleeve and the adjusting positioning device; any slight manufacturing error may lead to inaccurate positioning or loose connection; due to the complex structure, if the connecting rod needs to be disassembled or replaced, special tools or more complicated operating steps may be required, which increases the complexity and time cost of maintenance. Summary of the invention

[0006] In view of the above problems in the prior art, the present invention is proposed.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: a coupling structure, comprising a locking assembly, including a connecting pipe, a locking pipe arranged on the outer wall of the connecting pipe, a coupling pipe arranged on the outer wall of the locking pipe, and a locking sleeve sleeved on the outer wall of the coupling pipe;

[0008] One end of the locking tube extends to the inner wall of the coupling tube and is coupled thereto, and the locking sleeve is slidably disposed on the outer wall of the coupling tube for fixing the locking tube.

[0009] As a preferred solution of the coupling structure described in the present invention, the outer wall of the connecting tube is provided with a first coupling slope and a first screw, the end of the locking tube is fixed to the inner wall of the first coupling slope, and a locking rod is provided at one end of the locking tube away from the first coupling slope.

[0010] As a preferred solution of the coupling structure described in the present invention, wherein: a protrusion is provided at one end of the locking rod, a slope is provided on the outer wall of the end of the locking rod facing away from the protrusion, a concave ring is provided on the end face of the slope, and a snap-fit ​​surface is also provided on the outer wall of the slope and the snap-fit ​​surface is located on the end face of the locking rod.

[0011] As a preferred solution of the coupling structure described in the present invention, a limiting groove is provided on the outer wall of the locking tube, and a second coupling slope and an alignment rod are also provided on the end of the locking tube, and the second coupling slope and the outer wall of the alignment rod are fixed to the inner wall of the connecting tube.

[0012] As a preferred solution of the coupling structure of the present invention, the outer wall of the coupling tube is provided with a third coupling slope, the end face of the third coupling slope is provided with a locking groove and the outer wall of the third coupling slope is provided with a limit block, and the outer wall of the coupling tube is also provided with a sliding rod.

[0013] As a preferred solution of the coupling structure of the present invention, the inner wall of the coupling tube is provided with a guide rod and a limit rod is arranged in an array on the inner wall of the coupling tube, the end surface of the limit rod is provided with a guide rod, and the outer wall of the coupling tube is also provided with a second screw.

[0014] As a preferred solution of the coupling structure described in the present invention, wherein: a locking block is provided on the inner wall of the locking sleeve and the end of the locking block extends to the inner wall of the locking groove and slidably cooperates therewith, a sliding groove is also provided on the inner wall of the locking sleeve and the sliding groove slidably cooperates with the sliding rod, and a locking hole array is provided on the inner wall of the locking sleeve.

[0015] As a preferred solution of the coupling structure described in the present invention, wherein: a locking ring is fixed to the outer wall of the coupling tube, a fixing block is arranged on the end face of the locking ring, the outer wall of the fixing block is threadedly connected to a limiting screw and an inclined block is arranged at the end of the limiting screw, a locking block is arranged in an array on the outer wall of the locking ring, an active cavity is opened on the inner wall of the locking block, a first elastic member and a pushing block are arranged inside the active cavity, an inclined surface is arranged on the end of the pushing block and the inclined surface extends to the inner wall of the fixed block and cooperates with the inclined block at the end of the limiting screw.

[0016] As a preferred solution of the coupling structure described in the present invention, the inner wall of the pushing block is also provided with a movement cavity, the inner wall of the movement cavity is hinged with a fixing rod and one end of the fixing rod extends to the inner wall of the movement cavity, and the inner wall of the locking ring is movably provided with an arc rod.

[0017] A connector, applied to a coupling structure, includes a connecting assembly, the connecting assembly includes a first connector and a second connector, the end of the first connector extends to the inner wall of the connecting tube, the end of the second connector extends to the inner wall of the locking tube, the outer wall of the first connector is provided with a guide groove and a coupling surface, the outer wall of the second connector is provided with an alignment groove and a connecting groove, and a connecting block is arranged inside the connecting groove.

[0018] The beneficial effects of the present invention are as follows: the present invention ensures a stable and non-loose coupling connection between the connecting pipe and the coupling pipe through the close cooperation between the locking rod and the locking groove and the self-locking mechanism of the slope, thereby improving the reliability and durability of the connection. The locking block slides along the locking groove, and utilizes the inclined surface of the slope to easily release the locking state by sliding the locking sleeve. The operation is simple and quick, and the locking rod and the locking groove are separated, which is convenient for the withdrawal of the connecting pipe. The locking block can effectively prevent the locking sleeve from sliding accidentally, thereby ensuring the safety of the connection system in the locked state. The precise cooperation of the guide groove, the alignment rod, the coupling surface and other structures, as well as the fixing effect of the first screw and the second screw, ensure the stable installation of the connector in the pipe body, and prevent rotation and loosening. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the overall structure of a coupling structure of the present invention;

[0021] Figure 2 It is a front structural schematic diagram of the connecting pipe in the present invention;

[0022] Figure 3 It is a schematic diagram of the reverse structure of the connecting pipe in the present invention;

[0023] Figure 4 is a side sectional view of the connecting pipe in the present invention;

[0024] Figure 5 It is a schematic diagram of the positional relationship between the coupling tube and the locking sleeve in the present invention;

[0025] Figure 6 is a side sectional view of the locking sleeve in the present invention;

[0026] Figure 7 It is a front view of the coupling pipe in the present invention;

[0027] Figure 8 is a side cross-sectional view of the coupling pipe in the present invention;

[0028] Fig. 9 It is a schematic diagram of the positional relationship between the locking ring and the coupling tube in the present invention;

[0029] Fig.10 It is a schematic diagram of the internal structure of the locking block in the present invention;

[0030] Fig.11 is a side sectional view of the locking ring in the present invention;

[0031] Fig.12 It is a schematic structural diagram of a connecting part of a connecting piece in the present invention;

[0032] Fig.13 It is a schematic diagram of the connection relationship between the coupling structure and the connecting member in the present invention.

[0033] Figure numerals: 100, locking assembly; 101, connecting tube; 1011, first coupling slope; 1012, first screw; 102, locking tube; 1021, locking rod; 1022, convex block; 1023, slope; 1024, concave ring; 1025, engaging surface; 1026, limiting groove; 1027, second coupling slope; 1028, alignment rod; 103, coupling tube; 1031, third coupling slope; 1032, locking groove; 1033, limiting block; 1034, sliding rod; 1035, guide rod; 1036, limiting rod; 1037, guide rod; 1038, second screw; 104, locking sleeve; 1041, locking block; 1042, sliding groove; 1043, locking hole;

[0034] 200, locking ring; 201, fixed block; 2011, limiting screw; 2012, inclined block; 202, locking block; 2021, movable cavity; 2022, first elastic member; 2023, pushing block; 2024, inclined surface; 2025, moving cavity; 2026, fixed rod; 203, arc rod;

[0035] 300, connecting assembly; 301, first connecting member; 3011, guide groove; 3012, coupling surface; 302, second connecting member; 3021, alignment groove; 3022, connecting groove; 3023, connecting block. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0037] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0038] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0039] Example 1

[0040] This is the first embodiment of the present invention, which provides a coupling structure and a connecting piece.

[0041] Specifically, refer to Figure 1 The locking assembly 100 includes a connecting tube 101, a locking tube 102 disposed on the outer wall of the connecting tube 101, a coupling tube 103 disposed on the outer wall of the locking tube 102, and a locking sleeve 104 sleeved on the outer wall of the coupling tube 103;

[0042] One end of the locking tube 102 extends to the inner wall of the coupling tube 103 and is coupled thereto, and the locking sleeve 104 is slidably disposed on the outer wall of the coupling tube 103 to fix the locking tube 102 .

[0043] Among them, the locking tube 102 is fixed inside the connecting tube 101, and the two are an integral whole. When coupled, the front end part of the locking tube 102 enters the inner wall of the coupling tube 103, so that the connecting tube 101 and the coupling tube 103 are coupled. At this time, the locking sleeve 104 located outside the coupling tube 103 is located on the side of the outer surface of the coupling tube 103 that is relatively far away from the connecting tube 101. At this time, after the connecting tube 101 and the coupling tube 103 are coupled, the two are locked. When the locking sleeve 104 slides on the outer wall of the coupling tube 103 toward the connecting tube 101, the connecting tube 101 begins to be unlocked. When the locking sleeve 104 slides to the bottom close to the connecting tube 101, the connecting tube 101 can be pulled out from the inside of the coupling tube 103.

[0044] Preferably, refer to Figure 2 The outer wall of the connecting tube 101 is provided with a first coupling slope 1011 and a first screw 1012 , the end of the locking tube 102 is fixed to the inner wall of the first coupling slope 1011 , and a locking rod 1021 is provided at one end of the locking tube 102 away from the first coupling slope 1011 .

[0045] Among them, the first screw 1012 can be twisted inward on the outer wall of the connecting tube 101 to fix the object inserted into the connecting tube 101, and one end of the locking tube 102 is fixed inside the first coupling slope 1011, so that the locking tube 102 and the connecting tube 101 form a whole, and the locking tube 102 is provided with a locking rod 1021 on the outer side of the first coupling slope 1011, and the self-locking function of the connecting tube 101 and the coupling tube 103 after coupling is realized by the locking rod 1021.

[0046] Reference Figure 2 A protrusion 1022 is provided at one end of the locking rod 1021, a slope 1023 is provided on the outer wall of the end of the locking rod 1021 away from the protrusion 1022, a concave ring 1024 is provided on the end face of the slope 1023, and a snap-fit ​​surface 1025 is also provided on the outer wall of the slope 1023, and the snap-fit ​​surface 1025 is located on the end face of the locking rod 1021.

[0047] Among them, a protrusion 1022 is fixed on the upper surface of the top of the locking rod 1021. After the locking rod 1021 enters the interior of the coupling tube 103, the protrusion 1022 at the top of the locking rod 1021 will contact the inner wall of the coupling tube 103, so that the top position of the locking rod 1021 has a slightly downward tilted posture inside the coupling tube 103, and the corresponding rear end position of the locking rod 1021 will be slightly lifted upward, and the slope 1023 at the tail end of the locking rod 1021 will be lifted a little higher inside the coupling tube 103, which is more conducive to subsequent locking.

[0048] The ramp 1023 is fixed at the tail end of the locking rod 1021 and has an upwardly inclined slope. A slightly concave ring 1024 is provided at the top of the slope. The concave ring 1024 is recessed to a small extent, so that objects can slide in and out through the ramp 1023 conveniently. The engaging surface 1025 is perpendicular to the side surface of the ramp 1023 and is at a distance from the tail end of the locking rod 1021.

[0049] Reference Figure 3 , Figure 4 A limiting groove 1026 is provided on the outer wall of the locking tube 102 , and a second coupling slope 1027 and an alignment rod 1028 are also provided on the end of the locking tube 102 . The outer wall of the second coupling slope 1027 and the alignment rod 1028 are fixed to the inner wall of the connecting tube 101 .

[0050] Among them, the limiting groove 1026 is opened on the outer wall of the locking tube 102 and is opposite to the position of the locking rod 1021. The locking tube 102 is connected to the second coupling slope 1027 and the alignment rod 1028 at the connecting part of the inner wall of the connecting tube 101. The second coupling slope 1027 and the alignment rod 1028 are used to couple the objects subsequently fixed inside the connecting tube 101 and limit the movement.

[0051] Reference Figure 5 and Figure 6 A third coupling slope 1031 is disposed on the outer wall of the coupling tube 103 , a locking groove 1032 is provided on the end surface of the third coupling slope 1031 , a limiting block 1033 is disposed on the outer wall of the third coupling slope 1031 , and a sliding rod 1034 is also disposed on the outer wall of the coupling tube 103 .

[0052] Among them, the third coupling slope 1031 on the outer wall of the coupling tube 103 cooperates with the first coupling slope 1011 on the outer wall of the connecting tube 101, and the two slopes fit each other. After the connecting tube 101 is inserted into the inner wall of the coupling tube 103 and locked, the slope of the first coupling slope 1011 is in close contact with the slope of the third coupling slope 1031.

[0053] A locking groove 1032 is provided on the surface of the third coupling slope 1031. After the connecting tube 101 extends into the coupling tube 103, the locking tube 102 at the front end of the connecting tube 101 enters the coupling tube 103 as a whole, and the locking rod 1021 on the surface of the locking tube 102 passes under the locking groove 1032, and the slope 1023 on the upper surface of the locking rod 1021 slides inward along the inner wall of the third coupling slope 1031 until the entire locking tube 102 enters the coupling tube 103. At this time, the first coupling slope 1011 and the third coupling slope 1031 are coupled tightly, and the slope 1023 on the upper surface of the locking rod 1021 extends into the locking groove 1032 as a whole, and the engaging surface 1025 of the outer wall of the slope 1023 is tightly against the inner wall of the locking groove 1032 and is closely engaged with it. At this time, the connecting tube 101 and the coupling tube 103 are locked.

[0054] The limit block 1033 fixed at the top position of the upper surface of the third coupling slope 1031 and the sliding rod 1034 on the surface of the coupling tube 103 are used in conjunction with the locking sleeve 104 on the outer surface of the coupling tube 103. The limit block 1033 is used to prevent the locking sleeve 104 from accidentally slipping off, and the two sliding rods 1034 symmetrically arranged on the surface of the coupling tube 103 are slidably matched with the locking sleeve 104.

[0055] Reference Figure 7 , Figure 8 A guide rod 1035 is provided on the inner wall of the coupling tube 103 , and a limit rod 1036 is also provided in an array on the inner wall of the coupling tube 103 . A guide rod 1037 is provided on the end surface of the limit rod 1036 . A second screw rod 1038 is also provided on the outer wall of the coupling tube 103 .

[0056] Among them, the guide rod 1035 is tightly attached to the inner wall of the coupling tube 103 and is located in the middle position of the coupling tube 103. When the connecting tube 101 and the coupling tube 103 are coupled, the end of the guide rod 1035 close to the third coupling slope 1031 will enter the limiting groove 1026 on the lower surface of the locking tube 102 and slide inside the limiting groove 1026. Through the coupling and adhesion between the limiting groove 1026 on the surface of the locking tube 102 and the first coupling slope 1011 and the third coupling slope 1031, the axial direction of the connecting tube 101 and the coupling tube 103 during the coupling is limited, and the two cannot rotate after the coupling.

[0057] An array of limit rods 1036 is arranged on the inner wall of the coupling tube 103, and a guide rod 1037 is connected to the outside of each limit rod 1036. The limit rods 1036 and the guide rods 1037 are used to limit the shape of an object entering the coupling tube 103, and the second screw 1038 above is used to limit the object and lock it inside the coupling tube 103.

[0058] Better, refer to Figure 5~Figure 8 A locking block 1041 is provided on the inner wall of the locking sleeve 104, and the end of the locking block 1041 extends to the inner wall of the locking groove 1032 and slides with it. A sliding groove 1042 is also provided on the inner wall of the locking sleeve 104, and the sliding groove 1042 slides with the sliding rod 1034. A locking hole 1043 is provided in an array on the inner wall of the locking sleeve 104.

[0059] Among them, the locking block 1041 on the inner surface of the locking sleeve 104 slides inside the locking groove 1032 on the surface of the third coupling slope 1031, and the sliding groove 1042 on the inner surface of the locking sleeve 104 is wrapped around the outside of the sliding rod 1034 on the outer surface of the coupling tube 103, preventing the locking sleeve 104 from deflecting when sliding and fixing the locking sleeve 104 on the outside of the coupling tube 103.

[0060] When the locking sleeve 104 is initially in place, the locking block 1041 on the inner wall is located on the left side of the locking groove 1032. When the connecting tube 101 is coupled to the coupling tube 103, the locking tube 102 on the outside of the connecting tube 101 enters into the coupling tube 103, and the locking rod 1021 is tightly attached to the inner wall of the coupling tube 103. When the two are tightly coupled, the slope 1023 on the outer surface of the locking rod 1021 enters into the locking groove 1032 as a whole, and the engaging surface 1025 on the surface of the slope 1023 is attached to the right side surface of the locking groove 1032, so that the self-locking of the connecting tube 101 and the coupling tube 103 is achieved through the slope 1023.

[0061] When unlocking is required, the locking sleeve 104 is slid, and the locking block 1041 on the inner surface of the locking sleeve 104 slides from left to right in the locking groove 1032, and slides from the bottom of the slope 1023 on the surface of the locking rod 1021 to the top of the slope 1023. At this time, the bottom surface of the locking block 1041 begins to touch the surface of the slope 1023. As the locking sleeve 104 slides, the locking block 1041 gradually slides to the highest point of the slope 1023, that is, the position of the concave ring 1024 on the surface of the slope 1023. Since the surface of the locking sleeve 104 is restricted by the sliding of the sliding rods 1034 on both sides, the locking sleeve 104 will only move horizontally and will not move obliquely upward during the sliding process. Therefore, at this time, the locking block 1041 on the inner wall of the locking sleeve 104 is pressing the slope 1023 downward.

[0062] As the locking block 1041 slides upward along the slope 1023, the locking block 1041 also presses the slope 1023 downward, the tail end of the locking rod 1021 is positioned downward, and the engaging surface 1025 outside the slope 1023 is downward, losing contact with the right side surface of the locking groove 1032, and losing the locking effect on the connecting tube 101. At this time, the connecting tube 101 can be pulled outward to separate the connecting tube 101 and the coupling tube 103.

[0063] In summary, when in use, the connecting tube 101 is guided to the vicinity of the coupling tube 103, and the locking tube 102 at the front end of the connecting tube 101 gradually enters the interior of the coupling tube 103. It should be noted that the shapes of the holding parts of the connecting tube 101 and the coupling tube 103 are not unique, and the outer wall can also be a circular or square shape. The shape in this application is only an example. During the coupling process, the locking rod 1021 on the locking tube 102 slides along the inner wall of the third coupling slope 1031 on the outer side of the coupling tube 103 until the slope 1023 on the surface of the locking rod 1021 completely enters the locking groove 1032. At this time, the first coupling slope 1011 and the third coupling slope 1031 are tightly fitted to form a stable coupling connection. At the same time, the locking block 1041 of the locking sleeve 104 remains in the initial position of the locking groove 1032, and the locking state between the connecting tube 101 and the coupling tube 103 is ensured by the self-locking mechanism of the slope 1023.

[0064] When it is necessary to release the locking state between the connecting tube 101 and the coupling tube 103, the operator will slide the locking sleeve 104 to make the locking block 1041 on the inner wall of the locking sleeve 104 slide from left to right along the locking groove 1032, and the bottom surface of the locking block 1041 slides upward on the surface of the slope 1023. As the locking block 1041 applies downward pressure to the slope 1023, the engaging surface 1025 of the locking rod 1021 gradually separates from the right side surface of the locking groove 1032, thereby releasing the lock. At this time, the connecting tube 101 can be smoothly pulled out from the inside of the coupling tube 103, completing the entire unlocking and separation process.

[0065] Example 2

[0066] This is the second embodiment of the present invention, which is implemented based on the previous embodiment.

[0067] Specifically, refer to Fig. 9 , Fig.10 A locking ring 200 is fixed to the outer wall of the coupling tube 103, and a fixing block 201 is arranged on the end face of the locking ring 200. The outer wall of the fixing block 201 is screwed with a limiting screw 2011 and an inclined block 2012 is arranged at the end of the limiting screw 2011. A locking block 202 is arranged in an array on the outer wall of the locking ring 200. An active cavity 2021 is opened on the inner wall of the locking block 202. A first elastic member 2022 and a pushing block 2023 are arranged inside the active cavity 2021. An inclined surface 2024 is arranged on the end of the pushing block 2023 and the inclined surface 2024 extends to the inner wall of the fixed block 201 and cooperates with the inclined block 2012 at the end of the limiting screw 2011.

[0068] Among them, the locking ring 200 is fixed on the outside of the coupling tube 103, the fixing block 201 is fixed on the outside of the locking ring 200, the limiting screw 2011 rises and falls inside the fixing block 201, and an inclined block 2012 is fixed at the bottom of the limiting screw 2011, which moves downward with the limiting screw 2011.

[0069] The outer surface array of the locking ring 200 has multiple locking blocks 202, which cooperate with the locking holes 1043 on the inner surface of the locking sleeve 104. The lower surface of the locking block 202 is close to the outside of the coupling tube 103. When the locking sleeve 104 slides backward, the locking block 202 slides into the locking hole 1043 on the inner wall of the locking sleeve 104.

[0070] An active cavity 2021 is provided inside the locking block 202, and a first elastic member 2022 is installed at the front end of the active cavity 2021. The pushing block 2023 moves inside the active cavity 2021. An inclined surface 2024 is provided at the tail end of the pushing block 2023, and the inclined surface 2024 extends into the interior of the fixed block 201. When the limiting screw 2011 rotates downward, the inclined block 2012 at the bottom squeezes the inclined surface of the pushing block 2023, and slides the pushing block 2023 to the left side of the active cavity 2021, squeezing the first elastic member 2022. When the squeezing force is lost, the first elastic member 2022 recovers its deformation and pushes the pushing block 2023 back to its original position.

[0071] Better, refer to Fig.11 A moving cavity 2025 is also provided on the inner wall of the pushing block 2023 , a fixing rod 2026 is hingedly connected to the inner wall of the moving cavity 2021 and one end of the fixing rod 2026 extends to the inner wall of the moving cavity 2025 , and an arc rod 203 is movably provided on the inner wall of the locking ring 200 .

[0072] Among them, fixed rods 2026 are hinged at both ends of the movable cavity 2021, and the tail end of the fixed rod 2026 is inside the movable cavity 2025 opened inside the pushing block 2023. When the pushing block 2023 slides to the left, the moving cavity 2025 drives the tail end of the fixed rod 2026 to move in the direction of the first elastic member 2022. At this time, the fixed rod 2026 flips with the hinge point in the middle part as the fulcrum, and the front end position of the fixed rod 2026 flips and extends outward from the inside of the movable cavity 2021.

[0073] Two arc rods 203 are symmetrically arranged inside the locking ring 200. Both ends of the arc rod 203 have inclined surfaces, and one end of the arc rod 203 is squeezed by the inclined block 2012 at the bottom of the limiting screw 2011. When the limiting screw 2011 rotates downward, the bottom inclined block 2012 squeezes the inclined surface of the push block 2023 located in the middle position and the top inclined surfaces of the two arc rods 203 respectively, and squeezes the push block 2023 forward. At the same time, when the arc rods 203 on both sides are squeezed and move downward, the inclined surface at the bottom of the arc rod 203 will squeeze the inclined surfaces of the push blocks 2023 on both sides, and squeeze and push the push blocks 2023 on both sides forward, so that the fixing rod 2026 inside the locking block 202 is flipped outward at the same time, and enters the locking hole 1043 on the inner wall of the locking sleeve 104 to fix the locking sleeve 104.

[0074] In summary, when in use, after the connecting tube 101 and the coupling tube 103 are coupled and locked, the locking sleeve 104 is located at the left side of the coupling tube 103. In order to prevent the locking sleeve 104 from sliding to the right to unlock due to being touched, the locking sleeve 104 needs to be locked and limited. The operator rotates the limit screw 2011 to make it descend, and the inclined block 2012 at the bottom of the limit screw 2011 moves accordingly.

[0075] This action squeezes the inclined surface of the pushing block 2023 in the middle position through the inclined block 2012. Through the compression and release of the first elastic member 2022, the pushing block 2023 drives the fixing rod 2026 to flip and extend outward, so that the locking block 202 cooperates with the locking hole 1043 on the inner wall of the locking sleeve 104, and the inclined block 2012 also squeezes the top inclined surfaces of the arc rod 203 on both sides respectively, causing the arc rod 203 to move downward and further squeeze the pushing blocks 2023 on both sides with its bottom inclined surface, thereby synchronously pushing these pushing blocks 2023 and the fixing rod 2026 inside to flip outward and lock the locking sleeve 104. As the fixing rod 2026 is completely flipped and embedded in the locking hole 1043, the locking sleeve 104 is firmly fixed on the coupling tube 103, realizing a safe locking state of the entire system.

[0076] Example 3

[0077] This is the third embodiment of the present invention, which is implemented based on the previous embodiment.

[0078] Better, refer to Fig.12 , the connecting component 300, the connecting component 300 includes a first connecting member 301 and a second connecting member 302, the outer wall of the first connecting member 301 is provided with a guide groove 3011 and a coupling surface 3012, the outer wall of the second connecting member 302 is provided with a positioning groove 3021 and a connecting groove 3022, and a connecting block 3023 is arranged inside the connecting groove 3022.

[0079] Among them, the end positions of the first connecting member 301 and the second connecting member 302 are connected and fixed to the connecting tube 101 and the coupling tube 103 respectively. After the end position of the first connecting member 301 enters the connecting tube 101, the guide groove 3011 on the outer surface of the first connecting member 301 matches the alignment rod 1028 inside the connecting tube 101, and the coupling surface 3012 below is coupled with the second coupling slope 1027. Finally, the end position of the first connecting member 301 is fixed inside the connecting tube 101 by the first screw 1012, and the first connecting member 301 cannot rotate inside the connecting tube 101.

[0080] Similarly, after the end position of the second connecting member 302 enters the coupling tube 103, the alignment groove 3021 matches the guide rod 1035 on the inner wall of the coupling tube 103, and the connecting groove 3022 slides along the outside of the guide rod 1037 until the connecting block 3023 and the limiting rod 1036 inside the coupling tube 103 collide with each other, and finally the end of the second connecting member 302 is fixed in the coupling tube 103 by the second screw 1038.

[0081] The first connecting member 301 and the second connecting member 302 can be various connecting members, and the front ends can be objects with different functions. It is only necessary that the shapes of the ends of the first connecting member 301 and the second connecting member 302 are the same.

[0082] First, the end of the first connecting member 301 is fixed to the connecting pipe 101, and then the second connecting member 302 is fixed to the coupling pipe 103. Fig.13 As shown, the connecting pipe 101 and the coupling pipe 103 are finally coupled and locked to form a whole.

[0083] It should be noted that 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 preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A coupling structure, characterized in that: include: A locking assembly (100) comprises a connecting tube (101), a locking tube (102) arranged on the outer wall of the connecting tube (101), a coupling tube (103) arranged on the outer wall of the locking tube (102), and a locking sleeve (104) sleeved on the outer wall of the coupling tube (103); One end of the locking tube (102) extends to the inner wall of the coupling tube (103) and is coupled thereto, and the locking sleeve (104) is slidably disposed on the outer wall of the coupling tube (103) for fixing the locking tube (102); The outer wall of the connecting tube (101) is provided with a first coupling slope (1011) and a first screw rod (1012); the end of the locking tube (102) is fixed to the inner wall of the first coupling slope (1011); and a locking rod (1021) is provided at one end of the locking tube (102) away from the first coupling slope (1011); A protrusion (1022) is provided at one end of the locking rod (1021); a slope (1023) is provided on the outer wall of the end of the locking rod (1021) away from the protrusion (1022); a concave ring (1024) is provided on the end surface of the slope (1023); a snap-fit ​​surface (1025) is also provided on the outer wall of the slope (1023); and the snap-fit ​​surface (1025) is located on the end surface of the locking rod (1021); The outer wall of the coupling tube (103) is provided with a third coupling slope (1031), the end surface of the third coupling slope (1031) is provided with a locking groove (1032), and the outer wall of the third coupling slope (1031) is provided with a limit block (1033), and the outer wall of the coupling tube (103) is also provided with a sliding rod (1034); The inner wall of the locking sleeve (104) is provided with a locking block (1041), and the end of the locking block (1041) extends to the inner wall of the locking groove (1032) and slidably cooperates therewith; the inner wall of the locking sleeve (104) is also provided with a sliding groove (1042), and the sliding groove (1042) and the sliding rod (1034) are slidably cooperated; the inner wall of the locking sleeve (104) is provided with a locking hole (1043); A locking ring (200) is fixed on the outer wall of the coupling tube (103); a fixing block (201) is arranged on the end face of the locking ring (200); a limiting screw (2011) is threadedly connected to the outer wall of the fixing block (201), and an inclined block (2012) is arranged at the end of the limiting screw (2011); a locking block (202) is arranged in an array on the outer wall of the locking ring (200); an active cavity (2021) is provided on the inner wall of the locking block (202); a first elastic member (2022) and a pushing block (2023) are arranged inside the active cavity (2021); an inclined surface (2024) is arranged at the end of the pushing block (2023); and the inclined surface (2024) extends to the inner wall of the fixing block (201) and cooperates with the inclined block (2012) at the end of the limiting screw (2011); The inner wall of the push block (2023) is further provided with a movement cavity (2025); the inner wall of the movement cavity (221) is hinged with a fixing rod (2026), and one end of the fixing rod (2026) extends to the inner wall of the movement cavity (2025); and the inner wall of the locking ring (200) is movably provided with an arc rod (203); The locking block (202) matches with a locking hole (1043) on the inner surface of the locking sleeve (104).

2. The coupling structure according to claim 1, characterized in that: The outer wall of the locking tube (102) is provided with a limiting groove (1026), and the end of the locking tube (102) is also provided with a second coupling slope (1027) and an alignment rod (1028), and the outer wall of the second coupling slope (1027) and the alignment rod (1028) are fixed to the inner wall of the connecting tube (101).

3. The coupling structure according to claim 2, characterized in that: The inner wall of the coupling tube (103) is provided with a guide rod (1035), and the inner wall of the coupling tube (103) is also provided with limit rods (1036) in an array, the end surfaces of the limit rods (1036) are provided with guide rods (1037), and the outer wall of the coupling tube (103) is also provided with a second screw rod (1038).

4. A connector, applied to a coupling structure according to any one of claims 1 to 3, characterized in that: The invention comprises a connection assembly (300), wherein the connection assembly (300) comprises a first connection member (301) and a second connection member (302), wherein an end of the first connection member (301) extends to an inner wall of the connection tube (101), and an end of the second connection member (302) extends to an inner wall of the locking tube (102), a guide groove (3011) and a coupling surface (3012) are provided on an outer wall of the first connection member (301), and an alignment groove (3021) and a connection groove (3022) are provided on an outer wall of the second connection member (302), and a connection block (3023) is provided inside the connection groove (3022).

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