Pipe locking structure capable of effectively locking round pipe in square pipe

Abstract

A pipe locking structure capable of effectively locking a round pipe in a square pipe comprises the square pipe, a locking piece, a tightening piece and the round pipe. The square tube is provided with a hollow cavity with two open ends, and two opposite side walls of the square tube are provided with corresponding penetrating through holes. The locking piece comprises two locking cylinders which are oppositely installed in the left-right direction, flanges are arranged at the outer side ends of the locking cylinders, fastening parts are arranged at the inner side ends of the locking cylinders, at least two extending plates are arranged on the fastening parts, and limiting grooves are formed between the extending plates. The pipe locking structure with the locking piece and the tightening piece is designed to be matched with the special penetrating through hole in the square pipe, so that node connection between the square pipe and the round pipe is simple, attractive and firm; the locking piece and the penetrating through hole are further provided with corresponding rotation stopping structures, and the round pipe which is fixedly arranged in a penetrating mode can be prevented from being stressed to rotate; the utility model has the advantages of strong practicability and strong popularization significance.

Description

Technical Field

[0001] This utility model relates to a connecting and locking structure, and more particularly to a locking structure that can effectively lock a round tube inside a square tube. Background Technology

[0002] Railway safety guardrails are typically suspended and locked onto supports on railway tracks. They consist of several intersecting glass fiber round tubes and glass fiber square tubes. Because glass fiber tubes are like glass products, they are very hard but have no gripping force. The inventor developed a locking mechanism to lock the two together.

[0003] For example, Chinese patent CN202122474266.8 describes a positioning tube that can effectively lock a round tube and a safety guardrail with the positioning tube; it includes a tube body and a locking component, the tube body is provided with a locking hole, the locking hole extends outward with an annular skeleton, the skeleton extends inward at its free end with one or more adjustment grooves, the adjustment grooves divide the skeleton into several skeleton blocks; the locking component includes a body part and a locking fastener provided on the body part, the round tube passes through the locking hole and the skeleton, the body part of the locking component is sleeved on the skeleton, and the locking fastener locks the body part onto the skeleton.

[0004] However, with this locking structure, the locking fasteners protrude significantly from the outside of the pipe at the node, making the node connection structure less simple and aesthetically pleasing. Utility Model Content

[0005] Therefore, it is necessary to provide a locking structure that can effectively lock a round tube inside a square tube, addressing the shortcomings of existing technologies.

[0006] A locking structure for effectively locking a round tube within a square tube includes a square tube, locking components, a fastening member, and the round tube. The square tube has a hollow cavity with openings at both ends, and corresponding through holes on its two opposite sidewalls, the through holes communicating with the hollow cavity. The locking components include two locking cylinders mounted opposite each other, each with a flange at its outer end and a fastening part at its inner end. The fastening part has at least two extension plates forming a limiting groove between them. The fastening member is inserted into the hollow cavity from the end opening of the square tube, and is positioned opposite the through holes on both sides. The two locking cylinders pass through the corresponding through holes from the outer sides of the square tube, with their inner fastening parts inserted into the fastening member. The flanges of the two locking cylinders are confined outside the square tube, and the extension plate of one fastening part is embedded in the limiting groove at the corresponding position of the other fastening part. The round tube is sequentially inserted into the two locking cylinders, and the fasteners sequentially lock the fastening parts of the two locking cylinders and the round tube.

[0007] Furthermore, the inner edge of the through hole is provided with a locking step, and the inner surface of the flange of the locking cylinder is limited to the locking step. The locking step and the flanges on the left and right sides can prevent the locking device and the round tube from being pulled and moved along the through hole.

[0008] Furthermore, the outer side of the flange is provided with an anti-rotation protrusion extending radially outward, and the outer edge of the through hole is provided with an anti-rotation groove. The anti-rotation protrusion is fitted into the anti-rotation groove and can restrict the rotation of the locking cylinder.

[0009] Furthermore, the inner wall of the hollow cavity is provided with a clamping groove, which extends inward from the opening of the hollow cavity, and the width of the clamping groove is the same as the width of the clamping member. The clamping member slides into the hollow cavity along the clamping groove.

[0010] Furthermore, the inner end of the clamping groove is also designed with an arc-shaped upward curve.

[0011] Furthermore, the thickness of the extension plate is less than the thickness of the locking cylinder body, and the length of the extension plate is not less than the width of the clamping groove and the clamping member.

[0012] Furthermore, the outer end of one of the locking cylinders of the locking device is closed, and the round tube passes through the locking device with its end abutting against the closed outer end of the locking cylinder.

[0013] Furthermore, the clamping component includes a clamping ring and an adjusting bolt. The clamping ring has an open-loop structure design, with its two ends overlapping each other, and an adjusting through hole is provided at the overlapping position. The adjusting bolt passes through the adjusting through hole and can adjust the size of the clamping ring.

[0014] Furthermore, the square tube also includes a dust cover, and there are engaging through holes on both sides of the end of the square tube. The engaging through holes communicate with the hollow cavity, and the dust cover is fitted into the end of the square tube and is locked in place by the engaging through holes.

[0015] In summary, the advantages of this utility model's locking structure for effectively locking a round tube within a square tube are as follows: The design of the locking structure with locking fasteners and clamps, combined with the special through-holes on the square tube, makes the through-hole connection between the square and round tubes simple, aesthetically pleasing, and robust; the locking fasteners and through-holes are also designed with corresponding anti-rotation structures, effectively preventing the fixed round tube from rotating under force, further enhancing the reliability of the locking structure; the clamping groove within the hollow cavity of the square tube allows for more accurate and secure clamping; the extended plates with arc-shaped interlocking joints at the inner ends of the two locking cylinders increase the elastic deformation properties of the locking cylinders, allowing them to better hold and lock the round tube after being constrained by the clamps; the closed design of the outer end of one locking cylinder on each side and the dust cover structure at the end of the square tube protect the hollow round and square tubes respectively, preventing small parts, stones, dust, and other contaminants from entering the tube body and affecting normal use; this utility model is highly practical and has significant potential for widespread application. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the first embodiment of the present invention, which has a locking structure that can effectively lock a round tube inside a square tube;

[0017] Figure 2 for Figure 1 A schematic diagram of the decomposed structure;

[0018] Figure 3 for Figure 2 A magnified structural diagram of part A in the middle;

[0019] Figure 4 for Figure 2 Exploded view of the structure of a medium fastener;

[0020] Figure 5 for Figure 2 Exploded view of the central clamping component;

[0021] Figure 6 This is a schematic diagram of the second embodiment of the present invention, which has a locking structure that can effectively lock a round tube inside a square tube;

[0022] Figure 7 for Figure 6 A schematic diagram of the decomposed structure;

[0023] Figure 8 for Figure 7 A schematic diagram of the locking cylinder in the middle. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of the utility model.

[0025] like Figures 1 to 5 As shown, this is the first embodiment of the present invention, which provides a locking structure 100 that can effectively lock a round tube inside a square tube, including a square tube 10, a locking fastener 20, a clamping member 30 and a round tube 40.

[0026] The square tube 10 has a hollow cavity 11 with openings at both ends, and corresponding through holes 12 are provided on its two opposite side walls. The through holes 12 communicate with the hollow cavity 11. The locking device 20 includes two locking cylinders 21 installed opposite each other. The outer end 211 of the locking cylinder 21 has a flange 211a, and the inner end has a fastening part 212. The fastening part 212 is provided with at least two extension plates 212a, and a limiting groove 212b is formed between the extension plates 212a. The clamping device 30 includes a clamping ring 31 and an adjusting bolt 32. The clamping ring 31 has an open-loop structure design, and its two ends are arranged with overlapping inner and outer openings. An adjusting through hole 311 is also provided at the overlapping position. The adjusting bolt 32 passes through the adjusting through hole 311 and can adjust the size of the clamping ring 31.

[0027] The clamping member 30 is inserted into the hollow cavity 11 from the end opening of the square tube 10, and the clamping member 30 is positioned opposite to the through holes 12 on both sides; the two locking cylinders 21 are inserted into the corresponding through holes 12 from the two outer sides of the square tube 10, and the fastening parts 212 at their inner ends are all inserted into the clamping member 30; the flanges 211a of the two locking cylinders 21 are limited to the outside of the square tube 10, and the extension plate 212a of one fastening part 212 is embedded in the limiting groove 212b at the corresponding position of the other fastening part 212. The round tube 40 is sequentially inserted into the two locking cylinders 21, and the clamping member 30 sequentially locks the fastening parts 212 of the two locking cylinders 21 and the round tube 40.

[0028] Compared to conventional welding connections, the through-type connection method in this invention is more robust. Furthermore, compared to complex screw-in installations, the snap-fit ​​clamp structure in this invention, consisting of fasteners and clamping members 30, makes installation easier and simpler, significantly improving the ease of assembly and disassembly and reliability of the joint connection. Moreover, the locking member 20 is embedded within the square tube 10 rather than outside it, making the locking tube structure formed by assembling the square tube 10 and the round tube 40 more concise and aesthetically pleasing.

[0029] The inner edge of the through hole 12 is provided with a locking step 121. The inner surface of the flange 211a of the locking cylinder 21 is limited to the locking step 121. The locking step 121 and the flanges 211a on both sides limit the movement of the locking device 20 and the round tube 40 along the through hole 12. The fastening part 212 on the inner side of the locking cylinder 21 can hold and lock the round tube 40 under the action of the clamp 30. At the same time, the limiting structure design of the flange 211a and the locking step 121 prevents the integrated locking device 20 from being pulled to the left or right along the through hole 12. Consequently, the round tube 40, which is held and locked by the locking device 20, cannot be pulled to the left or right relative to the square tube 10. Finally, the round tube 40 is effectively locked inside the square tube 10. In addition, the design of the locking step 121 and the flange 211a further optimizes the aesthetics of the locking tube structure.

[0030] The outer side of the flange 211a is also provided with an anti-rotation protrusion 211b extending radially outward, and the outer edge of the through hole 12 is provided with an anti-rotation groove 122. The anti-rotation protrusion 211b is fitted into the anti-rotation groove 122 and can restrict the rotation of the locking cylinder 21. Due to the limiting effect of the anti-rotation protrusion 211b and the anti-rotation groove 122, the round tube 40, which is locked and fixed in the fastener, will not roll or rotate, thereby further improving the robustness of the locking tube structure.

[0031] The inner wall of the hollow cavity 11 is also provided with a clamping groove 111. The clamping groove 111 extends inward from the opening of the hollow cavity 11, and the width of the clamping groove 111 is the same as the width of the clamping member 30. The clamping member 30 slides into the hollow cavity 11 along the clamping groove 111. The clamping groove 111 enables the clamping member 30 to be accurately engaged in the hollow cavity 11 and aligned with the through holes 12 on both sides. The clamping groove 111 also restricts the clamping member 30, preventing it from being misaligned or displaced in the hollow cavity 11, which would affect the insertion of the circular tube 40.

[0032] The inner end 111a of the clamping groove 111 is also designed with an arc-shaped upward curve. The arc-shaped upward curve of the inner end 111a of the clamping groove 111 allows the clamping member 30 to be accurately engaged and positioned at a set depth, thereby ensuring that the clamping member 30 can be precisely aligned with the through holes 12 on both sides, so that the locking cylinders 21 on the left and right sides can pass through the clamping member 30, and also allows the round tube 40 to pass smoothly through the fastener 20. The arc-shaped upward curve of the inner end 111a of the clamping groove 111 can greatly reduce the tediousness of manually positioning the clamping member 30 during the assembly process, and greatly reduce the assembly difficulty.

[0033] Specifically, in this embodiment, the thickness of the extension plate 212a is less than the thickness of the locking cylinder 21, and the length of the extension plate 212a is not less than the width of the clamping groove 111 and the clamping member 30. The reduced thickness of the extension plate 212a not only provides better elastic deformation but also forms a stepped structure that facilitates alignment and fitting with the clamping member 30. The longer length of the extension plate 212a allows it to better grip and lock the round tube 40, making the locking installation of the square tube 10 and the round tube 40 more secure.

[0034] like Figures 6 to 8 As shown, this utility model also provides a second embodiment of a locking tube structure 100 that can effectively lock a round tube inside a square tube. This embodiment is basically the same as the first embodiment, except that: the outer end 211 of one of the locking cylinders 21 of the locking device 20 is closed, and the round tube 40 passes through the locking device 20 with its end abutting against the closed outer end 211 of the locking cylinder 21. The square tube 10 also includes a dust cover 13, and the ends of the square tube 10 are provided with engaging through holes 14 on both sides. The engaging through holes 14 communicate with the hollow cavity 11, and the dust cover 13 is fitted into the end of the square tube 10 and is limited by the engaging through holes 14. The single-sided closed design of the locking cylinder 21 and the dust cover 13 fitted into the end of the square tube 10 respectively protect the hollow round tube 40 and the square tube 10, effectively preventing foreign objects from entering the tube body and affecting the normal disassembly or use of the locking tube structure.

[0035] In summary, the beneficial effects of the locking structure 100 of this utility model, which can effectively lock a round tube inside a square tube, are as follows: By designing a locking structure with locking fasteners 20 and clamping fasteners 30, and cooperating with a special through hole 12 on the square tube, the through-hole structure connection between the square tube and the round tube 40 is both simple, aesthetically pleasing, and robust; the locking fasteners 20 and the through hole 12 are also designed with corresponding anti-rotation structures, which can effectively prevent the fixed round tube 40 from rotating under force, further improving the reliability of the locking structure; the hollow cavity 11 of the square tube 10 is designed with a clamping groove 111, which can... The clamping of the fastener 30 is more accurate and secure; the extension plate 212a of the arc-shaped interlocking splice of the inner ends of the two locking cylinders 21 can increase the elastic deformation property of the locking cylinder 21, so that it can better hold and lock the round tube 40 after being constrained by the fastener 30; the closed design of the outer end 211 of the single-sided locking cylinder 21 and the dust cover 13 structure of the end of the square tube 10 can protect the hollow round tube 40 and the square tube 10 respectively, preventing small parts or stones, dust and other dirt from entering the tube body and affecting normal use; this utility model is highly practical and has strong promotional significance.

[0036] The embodiments described above illustrate only one implementation of the utility model, and while the description is relatively specific and detailed, it should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept, and these all fall within the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be determined by the appended claims.

Claims

1. A locking structure that can effectively lock a round tube inside a square tube, characterized in that: The device includes a square tube, locking fasteners, a clamping member, and a round tube. The square tube has a hollow cavity open at both ends, and corresponding through holes are provided on its two opposite sidewalls, the through holes communicating with the hollow cavity. The locking fastener includes two locking cylinders installed opposite each other, each locking cylinder having a flange at its outer end and a fastening part at its inner end. The fastening part has at least two extension plates, with a limiting groove formed between the extension plates. The clamping member extends from the end of the square tube... The opening is inserted into the hollow cavity, and the fastener is positioned opposite to the through holes on both sides; the two locking cylinders are inserted from the outer sides of the square tube into the corresponding through holes, and the fastening parts at their inner ends are inserted into the fastener; the flanges of the two locking cylinders are limited to the outside of the square tube, and the extension plate of one fastening part is embedded in the limiting groove at the corresponding position of the other fastening part; the round tube is sequentially inserted into the two locking cylinders, and the fastener sequentially locks the fastening parts of the two locking cylinders and the round tube.

2. The locking structure as described in claim 1, which can effectively lock a round tube inside a square tube, is characterized in that: The inner edge of the through hole is provided with a locking step, and the inner surface of the flange of the locking cylinder is limited to the locking step. The locking step and the flanges on the left and right sides can prevent the locking device and the round tube from being pulled and moved along the through hole.

3. The locking structure as described in claim 1, which can effectively lock a round tube inside a square tube, is characterized in that: The outer side of the flange is also provided with an anti-rotation protrusion extending radially outward, and the outer edge of the through hole is provided with an anti-rotation groove; the anti-rotation protrusion is fitted into the anti-rotation groove and can restrict the rotation of the locking cylinder.

4. The locking structure as described in claim 1, which can effectively lock a round tube inside a square tube, is characterized in that: The inner wall of the hollow cavity is also provided with a clamping groove, which extends inward from the opening of the hollow cavity, and the width of the clamping groove is the same as the width of the clamping member; the clamping member slides into the hollow cavity along the clamping groove.

5. The locking structure as described in claim 4, which can effectively lock a round tube inside a square tube, is characterized in that: The inner end of the tight-fitting groove is also designed with an arc-shaped upward curve.

6. The locking structure as described in claim 4, which can effectively lock a round tube inside a square tube, is characterized in that: The thickness of the extension plate is less than the thickness of the locking cylinder body, and the length of the extension plate is not less than the width of the clamping groove and the clamping member.

7. The locking structure as described in claim 1, which can effectively lock a round tube inside a square tube, is characterized in that: The outer end of one of the locking cylinders of the locking device is closed, and the round tube passes through the locking device with its end abutting against the closed outer end of the locking cylinder.

8. The locking structure as described in claim 1, which can effectively lock a round tube inside a square tube, is characterized in that: The fastening component includes a fastening ring and an adjusting bolt. The fastening ring has an open-loop structure design, with its two ends overlapping each other and an adjusting through hole at the overlapping position. The adjusting bolt passes through the adjusting through hole and can adjust the size of the fastening ring.

9. The locking structure as described in claim 1, which can effectively lock a round tube inside a square tube, is characterized in that: The square tube also includes a dust cover, and the two ends of the square tube are provided with locking through holes; the locking through holes are connected to the hollow cavity, and the dust cover is fitted into the end of the square tube and is locked and limited by the locking through holes.

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