Mechanical connector for construction, and connection method for prefabricated component

Abstract

A mechanical connector for construction, and a connection method for a prefabricated component. The connector comprises a connecting sleeve, a connecting rod and a limiting ring, the connecting rod comprising a rod body and a clamping head located at one end of the rod body; the limiting ring is at least partially located in an accommodation cavity and located between the connecting sleeve and the connecting rod, and the clamping head abuts against the limiting ring; the limiting ring is provided with a radial adjustment hole, and the connecting rod can move along the radial adjustment hole; the limiting ring is provided with a rotating clamping slot, and the clamping head is in sliding fit with the rotating clamping slot in the length direction of the radial adjustment hole; and when the connecting rod rotates around its own axis, the clamping head can be engaged with the rotating clamping slot to drive the limiting ring to rotate relative to the connecting sleeve. The connector features flexible installation and easy operation, can quickly adjust the limiting ring to an accurate position, can significantly reduce the difficulty of connection operation, greatly improves the connection efficiency, and meets the requirements of on-site construction for timeliness.

Description

Mechanical connectors and connection methods for prefabricated components in construction

[0001] This application claims priority to Chinese Patent Application No. 202411440923.9, filed on October 15, 2024, entitled "Mechanical Connectors for Buildings and Method for Connecting Prefabricated Components", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This invention relates to the field of prefabricated component connection technology, and in particular to a mechanical connector for building and a method for connecting prefabricated components. Background Technology

[0003] Precast concrete components are usually designed with outward-extending steel bars to facilitate splicing. During the splicing process of precast components, due to production and processing errors and on-site assembly errors, the two steel bars to be joined may be misaligned or skewed and not on the same straight line, making it impossible to connect them using conventional connectors.

[0004] In response, a related technology provides a rebar connector for connecting two rebars that are not on the same straight line. This rebar connector includes a sleeve and a connecting rod axially inserted into the sleeve. The sleeve has an installation cavity inside, a through hole at the bottom communicating with the installation cavity, and an internal thread at the top for connecting a first rebar. One end of the connecting rod is designed with a limiting clamp, and the other end of the connecting rod extends out of the through hole for connecting a second rebar. An adjusting ring is provided between the limiting clamp of the connecting rod and the bottom wall of the installation cavity. The adjusting ring has a slotted hole, and the connecting rod can move along the slotted hole of the adjusting ring to adjust the radial position of the connecting rod relative to the sleeve, thereby achieving the connection of two rebars with different axes.

[0005] However, in practical use, to rotate the adjusting ring to the appropriate position so that the direction of its slotted hole is consistent with the misalignment or skew direction of the two reinforcing bars, this type of connector can only be rotated by turning the adjusting ring with a connecting rod. On the one hand, the connecting rod needs to be slid along the slotted hole to a position far from the center to generate torque, and then the adjusting ring can be turned. On the other hand, due to the friction between the adjusting ring and the sleeve, there will be resistance when turning the adjusting ring with the connecting rod, making the operation extremely unstable. It will result in either not rotating to the correct position or rotating too far, making it difficult to quickly adjust the adjusting ring to the accurate position. It often requires repeated operations to succeed, which is time-consuming and labor-intensive. If a large number of such connectors are needed for docking on site, it will seriously delay the construction progress. Summary of the Invention

[0006] This technical solution provides a mechanical connector for construction to solve the above-mentioned technical problems.

[0007] This technical solution also provides a method for connecting two prefabricated components using the building machinery.

[0008] The mechanical connector for construction provided by this technical solution includes a connecting sleeve, a connecting rod, and a limiting ring. The connecting sleeve has an internal receiving cavity, and one end of the connecting sleeve has a through hole communicating with the receiving cavity. The connecting rod passes through the connecting sleeve and includes a rod body extending out of the through hole and a locking head located at one end of the rod body. The limiting ring is at least partially located in the receiving cavity and between the connecting sleeve and the connecting rod. The locking head abuts against the limiting ring. The limiting ring has a radial adjustment hole, and the connecting rod can move along the radial adjustment hole. The limiting ring has a rotating groove, and the locking head slides into the rotating groove along the length direction of the radial adjustment hole. The locking head also stops the rotating groove in the rotational direction, thereby causing the limiting ring to rotate relative to the connecting sleeve.

[0009] Furthermore, the rotating slot is located at the upper end of the radial adjustment hole, and its extension direction is consistent with the length direction of the radial adjustment hole; the radial adjustment hole extends downward from the bottom wall of the rotating slot through the bottom surface of the limiting ring, and the card head is provided with a rotating locking part, which is embedded in the rotating slot to restrict the circumferential rotational freedom of the card head relative to the limiting ring.

[0010] Furthermore, the rotating slot is located on one or both sides of the upper end of the radial adjustment hole, and its extension direction is consistent with the length direction of the radial adjustment hole; the card head is provided with a rotating locking part, which is embedded in the rotating slot to restrict the circumferential rotational freedom of the card head relative to the limiting ring.

[0011] Furthermore, the rotating engagement portion of the card head is provided with a limiting surface, which engages with the side wall of the rotating card slot in a circumferential limiting manner.

[0012] Furthermore, the locking head includes a first stepped portion and a second stepped portion, the first stepped portion axially abutting against the top surface of the limiting ring, the rotating locking portion includes the second stepped portion, the second stepped portion axially abutting against the bottom wall of the rotating locking groove, and the side wall of the second stepped portion forms the limiting surface.

[0013] Furthermore, the card head is provided with a first stepped portion and a second stepped portion symmetrically arranged in the width direction of the radial adjustment hole.

[0014] Furthermore, the rotating engagement portion of the card head includes a protrusion that is embedded in the rotating slot from the axial abutment surface of the card head.

[0015] Furthermore, the card head is provided with symmetrical protrusions in the width direction of the radial adjustment hole.

[0016] Furthermore, the rotating slot includes a "U"-shaped slot with an upward-facing opening or an "L"-shaped slot with only one sidewall.

[0017] Furthermore, the receiving cavity is provided with a detachment-preventing surface, and the outer wall of the limiting ring is provided with a snap-fit ​​surface that abuts against the detachment-preventing surface, wherein the detachment-preventing surface and the snap-fit ​​surface are conical surfaces or partially spherical surfaces.

[0018] Furthermore, an axial stop surface is formed between the receiving cavity and the through hole to prevent the limiting ring from disengaging from the connecting sleeve. The limiting ring includes a first cylindrical section received in the receiving cavity and a second cylindrical section received in the through hole, and a stepped surface is formed between the outer wall of the first cylindrical section and the outer wall of the second cylindrical section.

[0019] Furthermore, the inner diameter of the through hole gradually decreases, and the shape of the second cylindrical section is adapted to the through hole.

[0020] Furthermore, it also includes a locking nut fitted onto the rod body of the connecting rod and screwed onto the rod body, the locking nut abutting against the connecting sleeve to lock and fix one end of the connecting sleeve to the connecting rod.

[0021] Furthermore, one end of the connecting sleeve extending from the rod body is a partially spherical surface, and the locking nut is provided with a ball-shaped cup portion that can match the partially spherical surface of the connecting sleeve.

[0022] Furthermore, the radial adjustment hole is located eccentrically on the limiting ring.

[0023] Furthermore, the two ends of the rotating slot pass through the limiting ring.

[0024] Furthermore, the dimension of the card head in the width direction of the radial adjustment hole is greater than the dimension of the card head in the length direction of the radial adjustment hole.

[0025] Furthermore, the two sides of the clip head in the radial adjustment hole length direction are arc-shaped so as to match the inner wall of the connecting sleeve.

[0026] Furthermore, the axial projection of the card head is elliptical.

[0027] Furthermore, let the width of the rotating slot be L1, the length of the card head along its major axis be L2, and the length of the card head along its minor axis be L3, then L2 > L3 > L1.

[0028] This technical solution provides a method for connecting precast components, which uses any of the above-mentioned mechanical connectors for construction to connect the first member of a first precast component and the second member of a second precast component, including:

[0029] Assembly steps for connectors: Place the limiting ring in the receiving cavity of the connecting sleeve, abut the locking head of the connecting rod against the limiting ring, and extend the rod body of the connecting rod out of the radial adjustment hole and the through hole. Assemble the connecting sleeve, connecting rod, and limiting ring of the two connectors into a whole.

[0030] Connection steps for two sets of connectors: Connect the other ends of the connecting sleeves of the two sets of connectors directly or through an intermediate connector;

[0031] One of the steps for connecting a set of connectors to the first rod is as follows: by rotating the connecting rod, the limiting ring rotates relative to the connecting sleeve by a predetermined angle, and the radial position of the connecting rod in the radial adjustment hole is adjusted so that the other end of the connecting rod is directly or indirectly connected to the first rod.

[0032] The other connecting component is connected to the second rod by rotating its connecting rod to make the limiting ring rotate relative to the connecting sleeve by a predetermined angle, adjusting the radial position of the connecting rod in the radial adjustment hole, so that the other end of the connecting rod is directly or indirectly connected to the second rod.

[0033] The mechanical connector for construction provided by this technical solution has a rotating groove designed on the limiting ring. The locking head can slide and engage with the rotating groove along the length direction of the radial adjustment hole, and can also engage with the rotating groove when the connecting rod rotates around its own axis. This causes the limiting ring to rotate relative to the connecting sleeve, rotating the adjusting ring to a suitable position so that the direction of its radial adjustment hole is consistent with the misalignment or skew direction of the two rods to be connected, thereby realizing the docking of the two rods to be connected. Thus, regardless of the position of the connecting rod in the radial adjustment hole, it can directly drive the limiting ring to rotate by rotating the connecting rod. If the connecting rod is exactly on the central axis of the connecting sleeve, it can drive the limiting ring to rotate synchronously around the central axis of the connecting sleeve. If the connecting rod deviates from the central axis of the connecting sleeve, the connecting rod can drive the limiting ring to rotate around the central axis of the connecting sleeve. While rotating around its own central axis, the connecting rod can also revolve around the central axis of the connecting sleeve. The entire rotation process is smooth and unobstructed. Through hand movements, the limiting ring can be rotated significantly by the connecting rod, or it can be rotated at a slight angle by the connecting rod. There will be no under-rotation or over-rotation. The installation is flexible and easy to operate, and the limiting ring can be quickly adjusted to the accurate position. This can significantly reduce the difficulty of connection operation, greatly improve connection efficiency, and meet the timeliness requirements of on-site construction. Attached Figure Description

[0034] Figure 1 is a structural schematic diagram of the mechanical connector for building provided in the first embodiment of the present invention;

[0035] Figure 2 is an axonometric view of the mechanical connector for construction shown in Figure 1 from the end view.

[0036] Figure 3 is a top view of the mechanical connector for construction shown in Figure 1;

[0037] Figure 4 is a cross-sectional view of the connecting sleeve shown in Figure 1;

[0038] Figure 5 is an axonometric view of the limiting ring shown in Figure 1;

[0039] Figure 6 is a cross-sectional view of the limiting ring shown in Figure 5;

[0040] Figure 7 is an axonometric view of the connecting rod shown in Figure 1;

[0041] Figure 8 is a schematic diagram of the operation of rotating the adjusting ring by rotating the connecting rod;

[0042] Figure 9 is a schematic diagram of the connecting rod driving the adjusting ring to rotate and revolve in Figure 8;

[0043] Figure 10 is a structural schematic diagram of a mechanical connector for construction provided in the second embodiment of the present invention;

[0044] Figure 11 is an axonometric view of the limiting ring shown in Figure 10;

[0045] Figure 12 is a cross-sectional view of the limiting ring shown in Figure 11;

[0046] Figure 13 is a schematic diagram of the structure of the locking nut shown in Figure 10;

[0047] Figure 14 is an exploded structural diagram of the mechanical connector for building provided in the third embodiment of the present invention;

[0048] Figure 15 is an axonometric view of the limiting ring shown in Figure 14;

[0049] Figure 16 is a structural schematic diagram of the mechanical connector for building provided in the fourth embodiment of the present invention;

[0050] Figure 17 is an axonometric view of the limiting ring shown in Figure 16;

[0051] Figure 18 is an axonometric view of the connecting rod shown in Figure 16;

[0052] Figure 19 is a structural schematic diagram of the mechanical connector for building provided in the fifth embodiment of the present invention;

[0053] Figure 20 is an axonometric view of the limiting ring shown in Figure 19;

[0054] Figure 21 is an axonometric view of the connecting rod shown in Figure 19;

[0055] Figure 22 is a structural schematic diagram of connecting the first rod of the first precast component and the second rod of the second precast component using the building mechanical connector of the first embodiment;

[0056] Figure 23 is an axonometric view of the two sets of mechanical connectors for construction shown in Figure 22 being connected.

[0057] Figure 24 is a schematic diagram of the structure for docking using the mechanical connector for building construction according to the second embodiment;

[0058] Figure 25 is a cross-sectional view of Figure 24;

[0059] Figure 26 is a schematic diagram of the structure for docking using the mechanical connector for building construction according to the third embodiment.

[0060] Figure 27 is a cross-sectional view of Figure 26.

[0061] In the figure: 1-Connecting sleeve; 11-Receiving cavity; 111-Anti-detachment stop surface; 12-Through hole; 13-Axial stop surface; 16-Threaded part; 2-Connecting rod; 21-Rod body; 211-Threaded part; 22-Clipper; 221-First step part; 222-Second step part; 223-Limiting surface; 224-Protrusion part; 3-Limiting ring; 3a-First cylindrical section; 3b-Second cylindrical section; 31-Radial adjustment hole; 32-Snapping surface; 33-Stepped surface; 36-Rotating groove; 4-Locking nut; 41-Spherical cup part; 5-Intermediate connecting piece; 6-Connecting nut; 7-Locking nut; 100-First prefabricated component; 101-First rod; 200-Second prefabricated component; 201-Second rod. Detailed Implementation

[0062] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0063] In this document, terms such as "upper," "lower," "inner," and "outer" are established based on the positional relationships shown in the accompanying drawings. Depending on the drawings, the corresponding positional relationships may also change. Therefore, they should not be interpreted as an absolute limitation on the scope of protection. Moreover, relational terms such as "first" and "second" are only used to distinguish one component from another that has the same name, and do not necessarily require or imply any such actual relationship or order between these components.

[0064] Please refer to Figures 1 to 7. Figure 1 is a structural schematic diagram of the mechanical connector for construction provided in the first embodiment of the present invention; Figure 2 is an axonometric view of the mechanical connector for construction shown in Figure 1 from an end view; Figure 3 is a top view of the mechanical connector for construction shown in Figure 1; Figure 4 is a cross-sectional view of the connecting sleeve shown in Figure 1; Figure 5 is an axonometric view of the limiting ring shown in Figure 1; Figure 6 is a cross-sectional view of the limiting ring shown in Figure 5; and Figure 7 is an axonometric view of the connecting rod shown in Figure 1.

[0065] As shown in the figure, in one specific embodiment, the mechanical connector for construction provided by the present invention mainly consists of a connecting sleeve 1, a connecting rod 2, and a limiting ring 3. The connecting sleeve 1 has a receiving cavity 11 inside, and one end of the connecting sleeve 1 has a through hole 12 communicating with the receiving cavity 11. The connecting rod 2 passes through the connecting sleeve 1 and includes a rod body 21 extending out of the through hole 12 and a clamp 22 located at one end of the rod body 21. The clamp 22 is a part that is enlarged relative to the diameter of the rod body 21, so that the connecting rod 2 is T-shaped in the longitudinal section.

[0066] The limiting ring 3 is located in the receiving cavity 11 and between the connecting sleeve 1 and the connecting rod 2. The clamp 22 abuts against the limiting ring 3. The limiting ring 3 is provided with a radial adjustment hole 31. The connecting rod 2 can move along the radial adjustment hole 31 to adjust the radial position of the connecting rod 2 relative to the connecting sleeve 1, to compensate for radial errors or deviations, and to realize the connection of different axes.

[0067] The cross-sectional area of ​​the through hole 12 is larger than that of the radial adjustment hole 31. The projection of the position adjustment hole 31 in the horizontal direction falls completely into the projection of the through hole 12 in the horizontal direction, making the rod 21 of the connecting rod 2 more smoothly deflected radially or moved horizontally in the radial adjustment hole 31.

[0068] An axial stop surface 13 is formed between the receiving cavity 11 and the through hole 12 to prevent the limiting ring 3 from disengaging from the connecting sleeve 1. The limiting ring 3 has a first cylindrical section 3a located in the receiving cavity 11 and a second cylindrical section 3b located in the through hole 12. The inner diameter of the through hole 12 gradually decreases. The shape of the second cylindrical section 3b is adapted to the through hole 12. A stepped surface 33 is formed between the outer wall of the first cylindrical section 3a and the outer wall of the second cylindrical section 3b.

[0069] To facilitate adjustment of the limiting ring 3, a rotating groove 36 is provided at the end of the limiting ring 3 that abuts against the connecting rod 2. The locking head 22 of the connecting rod 2 is embedded in the rotating groove 36 and can slide and cooperate with the rotating groove 36 along the length direction of the radial adjustment hole 31. At the same time, when the connecting rod 2 rotates around its own axis, the locking head 22 can engage with the rotating groove 36 to drive the limiting ring 3 to rotate relative to the connecting sleeve 1.

[0070] In this embodiment, the rotating slot 36 is located at the upper end of the radial adjustment hole 31, and its extension direction is consistent with the length direction of the radial adjustment hole 31. Both ends of the slot 3 pass through the limiting ring 3, and its length and width are greater than those of the radial adjustment hole 31. The radial adjustment hole 31 extends downward from the bottom wall of the rotating slot 36 through the bottom surface of the limiting ring 3. The card head 22 is provided with a rotating locking part, which is embedded in the rotating slot 36 to restrict the circumferential rotational freedom of the card head 22 relative to the limiting ring 3.

[0071] Specifically, the locking head 22 has a first stepped portion 221 and a second stepped portion 222 that are symmetrical in the width direction of the radial adjustment hole 31. The first stepped portion 221 axially abuts against the top surface of the limiting ring 3, and the second stepped portion 222 axially abuts against the bottom wall of the rotating slot 36. The second stepped portion 222 forms a rotating locking portion, and its side wall forms a limiting surface 223, which is circumferentially limited and engaged with the side wall of the rotating slot 36 through the limiting surface 223.

[0072] The dimension of the clamp head 22 in the width direction of the radial adjustment hole 31 is greater than the dimension of the clamp head 22 in the length direction of the radial adjustment hole 31. The two sides of the clamp head 22 in the length direction of the radial adjustment hole 31 are arc-shaped and can match the inner wall of the connecting sleeve 1. For example, in this embodiment, the axial projection of the clamp head 22 is elliptical.

[0073] Compared to a circular chuck head 22 with an axial projection, designing the axial projection of the chuck head 22 as an ellipse allows for several advantages. First, a first step 221 and a second step 222 can be designed on both sides of the major axis of the ellipse to engage with the chuck head 22. This ensures sufficient axial contact area between the chuck head 22 and the limiting ring 3, providing adequate axial connection strength to meet practical requirements while achieving radial adjustment and circumferential limiting. Second, the chuck head 22 can move outward as much as possible along the minor axis of the ellipse, allowing the connecting rod 2 a larger range of motion within the radial adjustment hole 31. This enhances the adjustment adaptability and achieves a better balance between axial connection strength and radial adjustment range, avoiding situations where axial connection strength is high but radial adjustment range is low, or vice versa.

[0074] In actual operation, when operating the connecting rod 2, it may be impossible to observe the internal structure of the connecting sleeve 1. Furthermore, the positions of the connecting sleeve 1, connecting rod 2, and limiting ring 3 are not fixed before connection. To ensure proper engagement between the locking head 22 of the connecting rod 2 and the rotating groove 36 of the limiting ring 3, a mis-assembly prevention design is implemented. Specifically, let the width of the rotating groove 36 be L1, the length of the locking head 22 along its major axis be L2, and the length along its minor axis be L3. Therefore, L2 > L3 > L1. With this design, the locking head 22 of the connecting rod 2 can only be inserted into the rotating groove 36 in the correct orientation shown in Figure 3, and not in an orientation rotated 90° relative to Figure 3. Even during blind operation, assembly errors will not occur, ensuring that the connecting parts are installed correctly.

[0075] In addition, the connector also has a locking nut 4 that is fitted onto the rod body 21 of the connecting rod 2 and screwed onto the rod body 21. The locking nut 4 abuts against the connecting sleeve 1 to lock and fix one end of the connecting sleeve 1 to the connecting rod 2, so that the contact between the connecting sleeve 1, the connecting rod 2 and the limiting ring 3 is tighter, thereby improving the pull-out and tensile strength of the connector.

[0076] Please refer to Figures 8 and 9 together. Figure 8 is a schematic diagram of the operation of rotating the adjusting ring by rotating the connecting rod; Figure 9 is a schematic diagram of the adjusting ring rotating and revolving by the connecting rod in Figure 8.

[0077] In actual use, because the limiting ring is designed with a rotating groove, the locking head can slide and engage with the rotating groove along the length of the radial adjustment hole, and at the same time, it can engage with the rotating groove when the connecting rod rotates around its own axis, thereby driving the limiting ring to rotate relative to the connecting sleeve, rotating the adjusting ring to a suitable position, so that the direction of its radial adjustment hole is consistent with the misalignment or skew direction of the two rods to be connected, thereby realizing the docking of the two rods to be connected.

[0078] Since the limiting ring is driven to rotate by rotating the connecting rod, if the central axis O2 of the connecting rod coincides with the central axis O1 of the connecting sleeve (which is less likely), the limiting ring can rotate synchronously with it around the central axis of the connecting sleeve. If the central axis O2 of the connecting rod deviates from the central axis O1 of the connecting sleeve (which is more likely), the connecting rod can drive the limiting ring to rotate around the central axis O1 of the connecting sleeve. The connecting rod can revolve around the central axis O1 of the connecting sleeve while rotating around its own central axis O2.

[0079] Compared to using a connecting rod to move the limit ring, the entire rotation process is smooth and unobstructed. With hand movements, the limit ring can be rotated at a large angle or at a small angle via the connecting rod. There will be no under-rotation or over-rotation. The installation is flexible and easy to operate, and the limit ring can be quickly adjusted to the accurate position. This significantly reduces the difficulty of connection operations, greatly improves connection efficiency, and meets the timeliness requirements of on-site construction.

[0080] Please refer to Figures 10 to 13. Figure 10 is a structural schematic diagram of the mechanical connector for construction provided in the second embodiment of the present invention; Figure 11 is an axonometric view of the limiting ring shown in Figure 10; Figure 12 is a cross-sectional view of the limiting ring shown in Figure 11; and Figure 13 is a structural schematic diagram of the locking nut shown in Figure 10.

[0081] As shown in the figure, the difference between this embodiment and the first embodiment is that:

[0082] The through hole 12 of the connecting sleeve 1 is a straight through hole, the receiving cavity 11 is provided with a non-detachment stop surface 111, and the outer wall of the limiting ring 3 is provided with a snap-fit ​​surface 32 that abuts against the non-detachment stop surface 111. The non-detachment stop surface 111 and the snap-fit ​​surface 32 are locally spherical surfaces (or conical surfaces) that can fit together.

[0083] The limiting ring 3 and the connecting sleeve 1 abut against each other through a local spherical surface, which can effectively prevent the limiting ring 3 from coming off the connecting sleeve 1 and ensure the axial connection strength of the two.

[0084] Furthermore, the end of the connecting sleeve 1 that extends out of the rod body 21 is a partially spherical surface, and the locking nut 4 is provided with a ball cup part 41 that can match the partially spherical surface of the connecting sleeve 1, so as to better apply the locking force to the connecting sleeve 1 and make the connecting sleeve 1 bear force evenly.

[0085] In this embodiment, the parts that are the same as in Embodiment 1 are given the same reference numerals, and the same text descriptions are omitted.

[0086] Please refer to Figures 14 and 15. Figure 14 is an exploded structural diagram of the mechanical connector for construction provided in the third embodiment of the present invention; Figure 15 is an axonometric view of the limiting ring shown in Figure 14.

[0087] As shown in the figure, the difference between this embodiment and the first embodiment is that the radial adjustment hole 31 is in an eccentric position on the limiting ring 3, that is, the center of the position adjustment hole 31 is not on the vertical central axis of the limiting ring 3, and there is a certain distance between them.

[0088] Because the area occupied by the radial adjustment hole 31 is reduced, this structure can increase the axial engagement area between the clamping head 22 and the limiting ring 3, thereby further improving the axial connection strength between the two. At the same time, the adjustment range of the connecting rod 2 in the radial adjustment hole 31 is mainly concentrated in the area far from the center. Therefore, it is more suitable for docking scenarios with large errors or deviations.

[0089] In use, if the operator visually determines that the error or deviation of the connecting rod is large, the connector of this embodiment can be used directly for docking, thereby saving operation time.

[0090] In this embodiment, the parts that are the same as in Embodiment 1 are given the same reference numerals, and the same text descriptions are omitted.

[0091] Please refer to Figures 16 to 18. Figure 16 is a structural schematic diagram of the mechanical connector for construction provided in the fourth embodiment of the present invention; Figure 17 is an axonometric view of the limiting ring shown in Figure 16; and Figure 18 is an axonometric view of the connecting rod shown in Figure 16.

[0092] As shown in the figure, the difference between this embodiment and the first embodiment is that:

[0093] The rotating slot 36 and the radial adjustment hole 31 are spaced apart. The rotating slot 36 is a U-shaped slot with the opening facing upward and is located on both sides of the upper end of the radial adjustment hole 31. Its extension direction is consistent with the length direction of the radial adjustment hole 31. Two protrusions 224 are symmetrically provided on the axial abutment surfaces on both sides of the clamp head 22. The protrusions 224 form a rotating clamping part, which is embedded in the rotating slot 36 to restrict the circumferential rotational freedom of the clamp head 22 relative to the limiting ring 3.

[0094] When the connecting rod 2 moves along the radial adjustment hole 31, the protrusion 224 can slide in the rotating slot 36. When the connecting rod 2 rotates, the clamp head 22 can drive the limiting ring 3 to rotate together through the protrusion 224, thereby achieving the purpose of adjusting the limiting ring 3.

[0095] Of course, there can be only one rotating slot 36, located on one side of the upper end of the radial adjustment hole 31, which can also achieve the purpose of the present invention.

[0096] In this embodiment, the parts that are the same as in Embodiment 1 are given the same reference numerals, and the same text descriptions are omitted.

[0097] Please refer to Figures 19 to 21. Figure 19 is a structural schematic diagram of the mechanical connector for construction provided in the fifth embodiment of the present invention; Figure 20 is an axonometric view of the limiting ring shown in Figure 19; and Figure 21 is an axonometric view of the connecting rod shown in Figure 19.

[0098] As shown in the figure, the difference between this embodiment and the first embodiment is that:

[0099] The rotating slot 36 and the radial adjustment hole 31 are spaced apart. The rotating slot 36 is an "L"-shaped slot with only one side wall and is located on both sides of the upper end of the radial adjustment hole 31. Its extension direction is consistent with the length direction of the radial adjustment hole 31. Two protrusions 224 are symmetrically provided on the axial abutment surfaces on both sides of the clamp head 22. The protrusions 224 form a rotating clamping part, which is embedded in the rotating slot 36 to restrict the circumferential rotational freedom of the clamp head 22 relative to the limiting ring 3.

[0100] When the connecting rod 2 moves along the radial adjustment hole 31, the protrusion 224 can slide along the rotating slot 36. When the connecting rod 2 rotates, the clamp head 22 can drive the limiting ring 3 to rotate together through the protrusion 224, thereby achieving the purpose of adjusting the limiting ring 3.

[0101] Of course, there can be only one rotating slot 36, located on one side of the upper end of the radial adjustment hole 31, which can also achieve the purpose of the present invention.

[0102] In this embodiment, the parts that are the same as in Embodiment 1 are given the same reference numerals, and the same text descriptions are omitted.

[0103] Please continue to refer to Figures 22 and 23. Figure 22 is a structural schematic diagram of connecting the first rod of the first precast component and the second rod of the second precast component using the building mechanical connector of the first embodiment; Figure 23 is an axonometric view of the two sets of building mechanical connectors shown in Figure 22 being connected.

[0104] This embodiment provides a method for assembling prefabricated components, which uses the building mechanical connectors of the first embodiment described above to connect the first rod 101 of the first prefabricated component 100 and the second rod 201 of the second prefabricated component 200, including:

[0105] Assembly steps of the connector: Place the limiting ring 3 in the receiving cavity 11 of the connecting sleeve 1, the locking head 22 of the connecting rod 2 abuts against the limiting ring 3, and the rod body 21 of the connecting rod 2 extends out of the position adjustment hole 31 and the through hole 12. Assemble the connecting sleeve 1, connecting rod 2 and limiting ring 3 of the two sets of connectors into a whole.

[0106] Connection steps for two sets of connectors: Connect the other ends of the connecting sleeves 1 of the two sets of connectors directly. For example, one connecting sleeve 1 has an external thread and the other connecting sleeve 1 has an internal thread. The two connecting sleeves 1 are connected by threads.

[0107] One of the connecting parts is connected to the first rod 101 in the following steps: the limiting ring 3 and the connecting rod 2 are rotated together relative to the connecting sleeve 1 by a predetermined angle, and the radial position of the connecting rod 2 in the position adjustment hole 31 is adjusted so that the other end of the rod body 21 of the connecting rod 2 is directly or indirectly connected to the first rod 101.

[0108] The other connecting member is connected to the second rod 201 by rotating the limiting ring 3 and the connecting rod 2 together relative to the connecting sleeve 1 by a predetermined angle, adjusting the radial position of the connecting rod 2 in the position adjustment hole 13, so that the other end of the rod body 21 of the connecting rod 2 is directly or indirectly connected to the second rod 201.

[0109] With the locking nut 4 present, in the connecting component assembly step, the locking nut 4 is fitted onto the rod 21 from the other end of the rod. The prefabricated component splicing method also includes a locking step following the steps of connecting one connector to the first rod 101 and the other connector to the second rod 201, by tightening the locking nut 4 until it abuts against one end of the connecting sleeve 1, causing the clamp 22 to abut against the limiting ring 3. It also includes a filling and reinforcement step following the locking step; filling and reinforcement material is applied to the connection portion between the first prefabricated component 100 and the second prefabricated component 200, i.e., covering the mechanical connector.

[0110] In another embodiment, the mechanical connectors for construction described in the second embodiment can be used for docking. Apart from the different structures of the connectors, the connecting sleeves 1 of the two sets of connecting components are connected by an intermediate connector 5. For example, the intermediate connector 5 is a double-threaded sleeve, and its two ends are threadedly connected to the two connecting sleeves 1. The specific structure after the connection is shown in Figures 24 and 25.

[0111] In another embodiment, the mechanical connectors for construction described in the third embodiment can be used for docking. One set of connectors has an external thread for the connecting sleeve 1, and the other set of connectors has an internal thread for the connecting sleeve 1. The two connecting sleeves 1 are threaded together, and the specific structure after the connection is shown in Figures 26 and 27.

[0112] The radial position of the connecting rod 2 in the two sets of connectors in the radial adjustment hole 31 can be adjusted independently to improve the radial deviation connection range applicable to the mechanical connector, which is suitable for connecting two rods with a large radial deviation range.

[0113] Of course, the structures of the two sets of connectors can be basically the same or completely the same, or the structures of the two sets of connectors can be different. For example, one set of connectors can be the connector assembly shown in the first embodiment, and the other set of connectors can be the connector assembly shown in the second embodiment, or one set of connectors can be the connector assembly shown in the second embodiment, and the other set of connectors can be the connector assembly shown in the third embodiment, and so on.

[0114] During installation, if the total length of the mechanical connector does not match the distance between the first rod 101 and the second rod 201, the connecting sleeve 1 or the intermediate connector 5 can be screwed in or out by a certain distance to change the total length of the mechanical connector.

[0115] It should be noted that the other end of the connecting sleeve 1 is provided with a threaded portion 16 or a snap-fit ​​portion to facilitate the connection of the connecting sleeve 1 with the rod, intermediate connecting member 5, or another connecting sleeve 1 or connecting rod 2. The threaded portion can be an internal threaded hole or an external thread. The snap-fit ​​portion has a snap-fit ​​hole inside for the rod or intermediate connecting member to be inserted. The snap-fit ​​portion can be a radially elastic card assembly or an integrated elastic card sleeve, etc. The connecting sleeve 1 and the rod can be connected by snap-fit, screw, pin, grouting, or welding. For example, the threaded portion of the connecting sleeve 1 is screwed to the rod, or the connecting sleeve 1 is indirectly connected to the rod body through an intermediate connecting component. The intermediate connecting component can be an adapter, one end of which is screwed, snap-fit, pinned, welded, or grouted to the connecting sleeve, and the other end of which is screwed, snap-fit, pinned, welded, or grouted to the rod, etc.

[0116] The other end of the connecting rod 2 is provided with a threaded part 211 or a plug-in part, so that the connecting rod 2 can be connected to the rod, the connecting sleeve, the intermediate connecting part 5, or another connecting rod 2. The threaded part 211 can be an internal thread or an external thread. The plug-in part can be a reducing plug or a plug with an annular groove on its outer peripheral wall, etc. The other end of the connecting rod 2 can be directly connected to the rod or indirectly connected through an intermediate connecting part. For example, the threaded part of the other end of the connecting rod 2 is screwed to the rod, or the intermediate connecting part is a connecting nut 6, with both ends of the connecting nut 6 screwed to the rod and the connecting rod 2 respectively. To make the connection between the connecting rod 2 and the connecting nut 6 more secure, a locking nut 7 is sleeved on and screwed onto the rod body 21, and the locking nut 7 abuts against the connecting nut 6. Alternatively, the intermediate connecting component can be a receiving sleeve, with a snap-fit ​​part that can be radially elastically stretched and expanded at one end. The snap-fit ​​part can be a separate card assembly or an integrated card cylinder, etc. The insertion part of the connecting rod 2 is inserted into the snap-fit ​​part to form a snap-fit ​​with the snap-fit ​​part. The rod is snap-fitted, screwed, welded, grouted, or pinned to the receiving sleeve, etc. Of course, in addition to snap-fitting, the connecting rod 2 and the receiving sleeve can also be connected by grouted connection, welding, or pinning.

[0117] The two connecting sleeves 1 can also be connected by means other than screwing, such as snap-fitting, grouting, welding, or bonding. For example, an adapter rod can be used instead of a double-ended screw or double-ended nut. The two ends of the adapter rod are snap-fitted, grouted, welded, or bonded to the corresponding two connecting sleeves 1. Taking snap-fitting as an example, the connecting sleeve 1 is provided with a snap-fitting part. The snap-fitting part has a snap-fitting hole for inserting the adapter rod. The snap-fitting part can be a radially elastic card assembly or an integrated elastic card cylinder, etc. The adapter rod is inserted into the snap-fitting hole of the snap-fitting part and forms a snap-fit ​​with the snap-fitting part.

[0118] To connect the two connecting components, the other ends of the rod bodies 21 of the two connecting rods 2 can be directly connected or connected through an intermediate connector 5, and the other ends of the two connecting sleeves 1 can be connected to the two rods respectively. The intermediate connector 5 can be a double-ended screw or a double-ended nut, and the two connecting rods 2 can be indirectly connected through the double-ended screw or double-ended nut. Alternatively, one of the rod bodies 21 of the two connecting rods 2 can be provided with an external thread, and the other can be provided with an internal thread that mates with the external thread. Alternatively, the two connecting rods 2 can also be connected by means other than screwing, such as by snap-fit ​​or grouting connection. For example, a sleeve can be used instead of a double-ended screw or double-ended nut. For example, the sleeve can be provided with a snap-fit ​​part that can be radially elastically stretched and expanded to snap-fit ​​the insertion part of the rod body 21. Alternatively, the sleeve and the rod body 21 can be connected by grouting. Alternatively, without a sleeve, the other ends of the rod bodies 21 of the two connecting rods 2 can be directly welded or bound together or connected by a hoop.

[0119] To connect the two connecting components, the other end of the rod body 21 of the connecting rod 2 of one connecting component can be directly connected to the other end of the connecting sleeve 1 of the other connecting component, or connected through an intermediate connector 5. The connecting sleeve 1 of one connecting component and the other end of the connecting rod 2 of the other connecting component are respectively connected to two rods. The connecting sleeve 1 and the rod body 21 are connected by screwing, snapping, grouting, pinning, welding, or clamping, etc. The intermediate connector 5 can be an adapter sleeve or an adapter rod. One end of the adapter sleeve or adapter rod is screwed, snapped, grouted, pinned, or welded to the other end of the rod body 21, etc., and the other end of the adapter sleeve or adapter rod is screwed, snapped, grouted, pinned, or welded to the other end of the connecting sleeve 1, etc. The other end of the rod 21 is directly connected to the connecting sleeve 1. This can be achieved by either the rod 21 or the connecting sleeve 1 having an internal threaded hole, and the other having an external thread that mates with the internal threaded hole. Alternatively, the end of the rod 21 furthest from the clamp 22 can form a nut with an internal thread, which is then screwed onto the external thread of the connecting sleeve 1. The rod 21 and the connecting sleeve 1 can be connected in ways other than screwing. These connections can be made by snap-fitting, bonding, grouting, or welding. Specifically, the connecting sleeve 1 has a snap-fit ​​part, which can be a card assembly capable of radial elastic contraction and expansion, or an integrated clamping sleeve. The other end of the rod 21 is inserted into the connecting sleeve 1 and snaps into the snap-fit ​​part. Alternatively, the other end of the rod 21 is inserted into the connecting sleeve 1, and grout is injected into the connecting sleeve 1 to fill the gap between the connecting sleeve 1 and the rod 21.

[0120] The mechanical connectors for construction and the connection method for prefabricated components provided by this invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the embodiments above are only for the purpose of helping to understand the core ideas of this invention. It should be noted that those skilled in the art can make various improvements and modifications to this invention without departing from the principles of this invention, and these improvements and modifications also fall within the protection scope of the claims of this invention.

Claims

1. A mechanical connection for construction, characterized in that The assembly includes a connecting sleeve (1), a connecting rod (2), and a limiting ring (3); the connecting sleeve (1) has a receiving cavity (11) inside, and one end of the connecting sleeve (1) has a through hole (12) communicating with the receiving cavity (11); the connecting rod (2) passes through the connecting sleeve (1), and the connecting rod (2) includes a rod body (21) extending out of the through hole (12) and a locking head (22) located at one end of the rod body (21); the limiting ring (3) is at least partially located in the receiving cavity (11) and is located between the connecting sleeve (1) and the connecting rod (22). Between the connecting rods (2), the clamp head (22) abuts against the limiting ring (3), the limiting ring (3) is provided with a radial adjustment hole (31), the connecting rod (2) can move along the radial adjustment hole (31); the limiting ring (3) is provided with a rotating groove (36), the clamp head (22) and the rotating groove (36) slide in cooperation along the length direction of the radial adjustment hole (31), and the clamp head (22) and the rotating groove (36) stop in cooperation in the rotation direction, so as to drive the limiting ring (3) to rotate relative to the connecting sleeve (1).

2. The architectural mechanical connector of claim 1, wherein, The rotating slot (36) is located at the upper end of the radial adjustment hole (31), and its extension direction is consistent with the length direction of the radial adjustment hole (31). The radial adjustment hole (31) extends downward from the bottom wall of the rotating slot (36) through the bottom surface of the limiting ring (3). The card head (22) is provided with a rotating snap-fit ​​part, which is embedded in the rotating slot (36) to restrict the circumferential rotational freedom of the card head (22) relative to the limiting ring (3).

3. The architectural mechanical connector of claim 1, wherein, The rotating slot is located on one or both sides of the upper end of the radial adjustment hole (31), and its extension direction is consistent with the length direction of the radial adjustment hole (31); the card head (22) is provided with a rotating snap-fit ​​part, which is embedded in the rotating slot (36) to restrict the circumferential rotational freedom of the card head (22) relative to the limiting ring (3).

4. The architectural mechanical connector of claim 2, wherein, The rotating snap-fit ​​portion of the snap-fit ​​head (22) is provided with a limiting surface (223), which is circumferentially limited and fitted with the side wall of the rotating snap-fit ​​groove (36).

5. The architectural mechanical connector of claim 4, wherein, The locking head (22) includes a first step portion (221) and a second step portion (222). The first step portion (221) axially abuts against the top surface of the limiting ring (3). The rotating locking portion includes the second step portion (222). The second step portion (222) axially abuts against the bottom wall of the rotating locking groove (36). The side wall of the second step portion (222) forms the limiting surface (223).

6. The architectural mechanical connector of claim 5, wherein, The clip (22) is provided with a first step portion (221) and a second step portion (222) symmetrical in the width direction of the radial adjustment hole (31).

7. The mechanical connector for construction according to claim 3, characterized in that, The rotating engagement portion of the card head (22) includes a protrusion (224) that is inserted into the rotating slot (36) from the axial abutment surface of the card head (22).

8. The architectural mechanical connector of claim 7, wherein, The clip (22) is provided with a symmetrical protrusion (224) in the width direction of the radial adjustment hole (31).

9. The architectural mechanical connector of claim 8, wherein, The rotating slot (36) includes a "U"-shaped slot with an upward-facing opening or an "L"-shaped slot with only one sidewall.

10. The architectural mechanical connector of claim 1, wherein, The receiving cavity (11) is provided with a detachment stop surface (111), and the outer wall of the limiting ring (3) is provided with a snap-fit ​​surface (32) that abuts against the detachment stop surface (111). The detachment stop surface (111) and the snap-fit ​​surface (32) are conical surfaces or partially spherical surfaces.

11. The architectural mechanical connector of claim 1, wherein, An axial stop (13) is formed between the receiving cavity (11) and the through hole (12) to prevent the limiting ring (3) from disengaging from the connecting sleeve (1). The limiting ring (3) includes a first cylindrical section (3a) received in the receiving cavity (11) and a second cylindrical section (3b) received in the through hole (12). A stepped surface (33) is formed between the outer wall of the first cylindrical section (3a) and the outer wall of the second cylindrical section (3b).

12. The architectural mechanical connector of claim 11, wherein, The inner diameter of the through hole (12) gradually decreases, and the shape of the second cylindrical section (3b) is adapted to the through hole (12).

13. The architectural mechanical connector of claim 1, wherein, It also includes a rod body (21) fitted onto the connecting rod (2) and a locking nut (4) screwed onto the rod body (21), the locking nut (4) abutting against the connecting sleeve (1) to lock and fix one end of the connecting sleeve (1) to the connecting rod (2).

14. The architectural mechanical connector of claim 13, wherein, The end of the connecting sleeve (1) extending out of the rod (21) is a partially spherical surface, and the locking nut (4) is provided with a ball cup (41) that can match the partially spherical surface of the connecting sleeve (1).

15. The architectural mechanical connector of claim 1, wherein, The radial adjustment hole (31) is located on the limiting ring (3) at an eccentric position.

16. The architectural mechanical connector of claim 1, wherein, The two ends of the rotating slot (36) pass through the limiting ring (3).

17. The architectural mechanical connector of any one of claims 1 to 16, wherein, The size of the clip (22) in the width direction of the radial adjustment hole (31) is greater than the size of the clip (22) in the length direction of the radial adjustment hole (31).

18. The architectural mechanical connector of claim 17, wherein, The two sides of the clip (22) along the length of the radial adjustment hole (31) are arc-shaped, which can match the inner wall of the connecting sleeve (1).

19. The architectural mechanical connector of claim 18, wherein, The axial projection of the card head (22) is elliptical.

20. The architectural mechanical connector of claim 19, wherein, Let the width of the rotating slot (36) be L1, the length of the major axis of the card head (22) be L2, and the length of the minor axis of the card head (22) be L3, then L2 > L3 > L1.

21. A method of connecting precast components, using a constructional mechanical connector according to any one of claims 1-20, for connecting a first bar of a first precast component (100) and a second bar of a second precast component (200), characterized in that, include: Assembly steps of the connector: Place the limiting ring (3) in the receiving cavity (11) of the connecting sleeve (1), the clamp (22) of the connecting rod (2) abuts against the limiting ring (3), the rod body (21) of the connecting rod (2) extends out of the radial adjustment hole (31) and the through hole (12), and assemble the connecting sleeve (1), connecting rod (2) and limiting ring (3) of the two connectors into a whole; Connecting steps for two sets of connectors: Connect the other end of the connecting sleeve (1) of the two sets of connectors directly or through the intermediate connector (5); One of the connecting parts is connected to the first rod in the following steps: by rotating the connecting rod (2), the limiting ring (3) rotates relative to the connecting sleeve (1) by a predetermined angle, and the radial position of the connecting rod (2) in the radial adjustment hole (31) is adjusted so that the other end of the rod body (21) of the connecting rod (2) is directly or indirectly connected to the first rod (101). Another connecting component is connected to the second rod by rotating its connecting rod (2) to make the limiting ring (3) rotate relative to the connecting sleeve (1) by a predetermined angle, adjusting the radial position of the connecting rod (2) in the radial adjustment hole (31), so that the other end of the rod body (21) of the connecting rod (2) is directly or indirectly connected to the second rod (201).

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