Bolt type mechanical connecting piece and concrete prefabricated piece connecting structure

Abstract

The utility model discloses a bolt type mechanical connecting piece and a concrete prefabricated piece connecting structure. The bolt type mechanical connecting piece comprises an upper sleeve, a lower sleeve, an inserting rod, a connecting nut, a buckling cylinder and an elastic element. The inserting rod is fixedly connected with the upper sleeve; the buckle cylinder and the elastic element are sequentially packaged in the lower sleeve through the connecting nut from top to bottom. During connection, the inserting rod penetrates through the connecting nut to be connected with the buckling cylinder. The top of the buckling cylinder is connected with the bottom of the connecting nut to form a detachable integral piece; a connecting groove is formed in the bottom of the connecting nut inner ring; the buckling cylinder comprises a split clamping block, an elastic part and a fixed base, a connecting clamping table is arranged on the outer diameter of the split clamping block, when the connecting nut is connected with the buckling cylinder, the connecting clamping table is clamped in the connecting groove, and the fixed base is arranged outside the connecting groove. The utility model has the benefits that the bending resistance can be improved while the assembly efficiency is improved, and a thicker and stronger buckling cylinder structure can be mounted under the condition that the inner diameter of the lower sleeve is the same, so that the pulling resistance is improved, and the connection reliability is improved.

Description

Technical Field

[0001] The utility model relates to a connecting device and a connecting structure for concrete piles, in particular to a plug - type mechanical connector and a connecting structure for concrete precast members, belonging to the technical field of concrete precast member production. Background Art

[0002] At present, in foundation engineering, precast piles are widely used and often in the form of multi - section piles. When splicing piles, the connection between the upper and lower section piles is mainly achieved by welding the end plates at the adjacent pile ends. This welding connection method not only requires high technical levels of construction workers, but is also greatly affected by external weather and the level differences of on - site construction workers, resulting in large quality differences in the welding of piles. It is difficult to control the welding quality, thus leading to potential safety hazards in the connection structure at the pile heads of precast piles. In some projects, in order to solve the quality hazards of on - site welding construction, mechanical connections are adopted, realizing the non - welding of precast piles during on - site installation, such as plug - type mechanical connections and other mechanical connection joints.

[0003] However, in the prior art, the intermediate nut of the plug - type mechanical connector is usually a simple cylindrical structure with an outward - expanding opening at the bottom of the inner diameter. During installation, the spring, the retaining cylinder, and the intermediate nut are installed in the lower sleeve one by one. The conical surface at the top of the retaining cylinder contacts the opening at the bottom of the inner diameter of the intermediate nut. After the plug rod is inserted, the engaging surface of the retaining cylinder is tightly clamped with the plug rod. When the plug rod bears a bending force, the conical surface at the top of the retaining cylinder will tilt and change along with the conical surface of the opening at the bottom of the inner diameter of the intermediate nut, and even come off, resulting in connection failure. Such connection components are cumbersome to install and have weak bending resistance.

[0004] In addition, in the prior art, there is also a disclosure of a form in which the intermediate nut, the retaining cylinder, and the spring are pre - assembled into a whole in a packaged form and installed in the lower sleeve at one time. Although the on - site installation efficiency is improved, this form limits the size of the retaining cylinder, making the retaining cylinder structure that can be accommodated in the same - sized lower sleeve smaller, with weak anti - pulling and anti - bending forces. Summary of the Invention

[0005] Object of the Invention: The object of the utility model is to solve the problems existing in the prior art, and provide a plug - type mechanical connector and a connecting structure for concrete precast members, realizing the integration of the connecting nut, the retaining cylinder, and the spring, with simple joint processing, high installation efficiency, and reducing the quality problems caused by the inclination of the retaining cylinder during the installation of the plug rod.

[0006] Technical solution: A plug - type mechanical connector, comprising an upper sleeve, a lower sleeve, a plug rod, a connecting nut, a buckle cylinder and an elastic element; the plug rod is fixedly connected with the upper sleeve; the connecting nut encapsulates the buckle cylinder and the elastic element inside the lower sleeve from top to bottom in sequence; when the upper sleeve and the lower sleeve are connected, the plug rod passes through the connecting nut and is connected with the buckle cylinder, and both ends of the elastic element are respectively in contact with the bottom of the buckle cylinder and the bottom inside the lower sleeve; the top of the buckle cylinder is connected with the bottom of the connecting nut to form an integral part, and the integral part is a detachable structure; a connecting groove is provided at the bottom inside the inner circle of the connecting nut; the buckle cylinder is a hollow cylindrical structure, and the buckle cylinder comprises a split block, an elastic part and a fixed base, a connecting clamping platform is provided on the outer diameter of the split block, when the connecting nut is connected with the buckle cylinder, the connecting clamping platform is clamped in the connecting groove, and the fixed base is placed outside the connecting groove.

[0007] The utility model can pre - install the buckle cylinder and the connecting nut into an integral part in a non - construction site in advance. During the construction site, only the plug rod and the integral part need to be installed, reducing the on - site installation steps and increasing the efficiency by more than 50%. During installation, the buckle cylinder with an elastically contractible diameter hollow cylindrical structure can facilitate the insertion of the connecting clamping platform into the connecting groove; at the same time, squeezing the buckle cylinder can prompt the buckle cylinder to reduce its inner diameter, thereby improving the connection reliability between the plug rod and the buckle cylinder; and under the condition of the same inner diameter of the lower sleeve, a thicker buckle cylinder structure can be installed to improve the anti - pulling property and increase the connection reliability. Through the cooperation of the connecting groove and the connecting clamping platform, it can prevent the buckle cylinder from disengaging from the connecting nut, thus avoiding problems such as connection quality.

[0008] In order to still be able to complete the rapid and reliable connection between the plug rod and the buckle cylinder after the pre - installation of the connecting nut and the buckle cylinder, the height of the connecting groove is greater than the height of the connecting clamping platform and less than the height of the split block. In the initial state when the pre - installation of the connecting nut and the buckle cylinder is completed, the elastic element abuts against the buckle cylinder, making the top of the buckle cylinder in contact with the inner side of the connecting nut, causing the inner diameter of the buckle cylinder to shrink; when the plug rod is inserted, it first pushes the buckle cylinder to move downward. Since the height of the connecting groove is greater than the height of the connecting clamping platform, the connecting clamping platform slides downward in the connecting groove, further compressing the elastic element, reducing the compression amount of the inner diameter of the buckle cylinder and facilitating the insertion of the plug rod. The height of the connecting groove is less than the height of the split block, and the upper end of the split block extends out of the connecting groove and contacts the inner diameter of the connecting nut, ensuring the reliable connection between the split block and the plug rod.

[0009] Preferably, in order to reduce the inner diameter of the buckle cylinder to improve the connection quality and reliability, an inner conical surface is provided above the connecting groove of the inner circle of the connecting nut, and the outer diameter above the split block is an outer conical surface; when the connecting nut is connected with the buckle cylinder, the outer conical surface contacts the inner conical surface. Through the extrusion between the outer conical surface and the inner conical surface, the inner diameter of the buckle cylinder can be reduced, thereby realizing the reliable connection between the plug rod and the buckle cylinder.

[0010] Preferred option: To achieve reliable and stable locking of the button barrel, the taper of the inner conical surface is adapted to the taper of the outer conical surface. The adaptation of the tapers means that there are more contact surfaces between the inner and outer conical surfaces, making the driving and locking of the button barrel more stable and reliable.

[0011] Preferred option: To improve the connection reliability and the installation convenience of the plug rod, the plug rod includes a clamping portion that is clamped with the button barrel; the inner diameter of the button barrel is provided with a locking portion; after the plug rod is inserted, the locking portion and the clamping portion form a clamping fit. When the button barrel moves downward and resumes under the action of elastic force, the top opening of the button barrel returns to the initial state. When the top opening returns to a state where the clamping portion can pass through, the button barrel stops moving downward until a larger opening is required for further insertion of the plug rod. However, throughout the process, the locking portion always tightly holds the clamping portion, ensuring the reliability of the connection.

[0012] Preferred option: To improve the adaptability of the connecting piece, the clamping portion is an outwardly convex annular ratchet structure, and the inner diameter of the locking portion is provided with an annular ratchet groove that matches the ratchet teeth. Through the cooperation of the annular ratchet teeth and the annular ratchet groove, a non-retractable connection at various relative positions between the clamping portion and the locking portion can be achieved, improving the adaptability of the connecting piece.

[0013] Preferred option: To achieve rapid and reliable connection of the connecting piece, the clamping portion is a tapered flange at the bottom of the plug rod, and the inner diameter of the locking portion is provided with a clamping surface that matches the upper surface of the tapered flange. The surface contact between the upper surface of the tapered flange and the clamping surface can achieve reliable and stable connection of the connecting piece. At the same time, through the calculated position of the tapered flange, rapid and stable connection between the upper surface of the tapered flange and the clamping surface can be achieved.

[0014] Preferred option: To facilitate the installation of the elastic element, the elastic element is a spring with a reduced-diameter portion at the top. The bottom of the button barrel is provided with a connection hole, and the outer diameter of the reduced-diameter portion has an interference fit with the inner diameter of the connection hole.

[0015] Compared with the form of screwing the elastic element with the nut, the clamping form of the elastic element of the present utility model with the button barrel is more convenient for installation. Moreover, the elastic element contacts the bottom of the sleeve or the pier head, and its elastic force relies on the bottom support, with stronger elastic force, ensuring that the upper part of the button barrel tightly abuts against the inclined surface section of the connecting nut, making the plug rod bite fully.

[0016] Preferred option: To improve the connection reliability between the spring and the connection hole, the inner diameter of the connection hole is provided with a convex portion that protrudes inward, and the convex portion is helically clamped with the outer diameter of the reduced-diameter portion. The convex portion on the inner diameter of the connection hole can increase the friction force between the connection hole and the outer diameter of the spring, thereby improving the connection reliability.

[0017] A connecting structure for concrete precast components, comprising a first precast component and a second precast component. The first precast component and the second precast component are connected by a connecting piece, and the connecting piece is the above-mentioned plug-in mechanical connecting piece. The upper sleeve and the plug rod of the plug-in mechanical connecting piece are arranged at one end of the first precast component, and the connecting nut, the fastening cylinder and the elastic element of the plug-in mechanical connecting piece are arranged at one end of the second precast component. Connecting the first precast component and the second precast component through the connecting piece can improve the reliability of the connection of concrete precast components.

[0018] Beneficial effects: The utility model can pre-install the fastening cylinder and the connecting nut into an integral part in a non-construction site in advance. During the construction site, only the plug rod and the integral part need to be installed, which reduces the on-site installation steps and improves the efficiency by more than 50%. When installing, the fastening cylinder with an elastic shrinkable diameter hollow cylindrical structure can facilitate the connecting clamping platform to be inserted into the connecting groove; at the same time, squeezing the fastening cylinder can cause the inner diameter of the fastening cylinder to shrink, thereby improving the reliability of the connection between the plug rod and the fastening cylinder; and when the inner diameter of the lower sleeve is the same, a thicker fastening cylinder structure can be installed to improve the anti-pulling property and increase the connection reliability. Through the cooperation of the connecting groove and the connecting clamping platform, it can prevent the fastening cylinder from disengaging from the connecting nut, thus avoiding problems such as connection quality. Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0020] Figure 1 It is the structural decomposition diagram of the first embodiment of the present invention;

[0021] Figure 2 It is the assembly schematic diagram of the first embodiment of the present invention;

[0022] Figure 3 It is the partial view when the connecting nut, the fastening cylinder and the spring of the first embodiment of the present invention are installed together;

[0023] Figure 4 It is the three-dimensional view of the connecting nut of the present invention;

[0024] Figure 5 It is the cross-sectional view of the connecting nut of the present invention;

[0025] Figure 6 It is the three-dimensional view of the fastening cylinder of the first embodiment of the present invention;

[0026] Figure 7Cross-sectional view of the buckle cylinder of the first embodiment of the present utility model;

[0027] Figure 8 Front view of the spring of the present utility model;

[0028] Figure 9 3D view of the plug rod of the first embodiment of the present utility model;

[0029] Figure 10 Assembly schematic diagram of the second embodiment of the present utility model;

[0030] Figure 11 Cross-sectional view of the buckle cylinder of the second embodiment of the present utility model;

[0031] Figure 12 Cross-sectional view of the plug rod of the second embodiment of the present utility model. Detailed implementation manners

[0032] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0033] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0034] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may include direct contact between the first and second features, or may include indirect contact between the first and second features through additional features therebetween. Moreover, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature. Embodiment

[0035] As Figures 1-7As shown in the figure, a bolt-type mechanical connector includes an upper sleeve 1, a lower sleeve 2, a bolt 3, a connecting nut 4, a buckle cylinder 5 and an elastic element 6; the bolt 3 is fixedly connected to the upper sleeve 1; the connecting nut 4 encapsulates the buckle cylinder 5 and the elastic element 6 inside the lower sleeve 2 from top to bottom in sequence; when the upper sleeve 1 and the lower sleeve 2 are connected, the bolt 3 passes through the connecting nut 4 and is connected to the buckle cylinder 5, and both ends of the elastic element 6 are in contact with the bottom of the buckle cylinder 5 and the bottom inside the lower sleeve 2 respectively; the top of the buckle cylinder 5 is connected to the bottom of the connecting nut 4 to form an integral part, and the integral part is a detachable structure; a connecting groove 41 is provided at the bottom of the inner ring of the connecting nut 4; the buckle cylinder 5 is a hollow cylindrical structure, and the buckle cylinder 5 includes a split clamping block 51, an elastic part 52 and a fixed base 53. A connecting clamping platform 54 is provided on the outer diameter of the split clamping block 51. When the connecting nut 4 is connected to the buckle cylinder 5, the connecting clamping platform 54 is clamped in the connecting groove 41, and the fixed base 53 is placed outside the connecting groove 41.

[0036] The utility model can pre-install the buckle cylinder 5 and the connecting nut 4 into an integral part in a non-construction site in advance. During the construction site, only the bolt 3 and the integral part need to be installed, which reduces the on-site installation steps and improves the efficiency by more than 50%. When installing, the buckle cylinder 5 with an elastically shrinkable diameter hollow cylindrical structure can facilitate the insertion of the connecting clamping platform 54 into the connecting groove 41; at the same time, squeezing the buckle cylinder 5 can cause the inner diameter of the buckle cylinder to shrink, thereby improving the connection reliability between the bolt 3 and the buckle cylinder 5; and when the inner diameter of the lower sleeve 2 is the same, a thicker buckle cylinder 5 structure can be installed to improve the anti-pulling property and increase the connection reliability. Through the cooperation of the connecting groove 41 and the connecting clamping platform 54, it is possible to prevent the buckle cylinder 5 from disengaging from the connecting nut 4, thereby avoiding problems such as connection quality.

[0037] As Figure 3 shown, in order to still be able to complete the rapid and reliable connection between the bolt 3 and the buckle cylinder 5 after the pre-installation of the connecting nut 4 and the buckle cylinder 5, the height of the connecting groove 41 is greater than the height of the connecting clamping platform 54 and less than the height of the split clamping block 51. In the initial state when the pre-installation of the connecting nut 4 and the buckle cylinder 5 is completed, the elastic element 6 abuts against the buckle cylinder 5, so that the top of the buckle cylinder 5 is in contact with the inner side of the connecting nut 4, causing the inner diameter of the buckle cylinder 5 to shrink; when the bolt 3 is inserted, it first pushes the buckle cylinder 5 downward. Since the height of the connecting groove 41 is greater than the height of the connecting clamping platform 54, the connecting clamping platform 54 slides downward in the groove 41, thereby further compressing the elastic element 6 and reducing the compression amount of the inner diameter of the buckle cylinder 5, which is convenient for the insertion of the bolt 3. The height of the connecting groove 41 is less than the height of the split clamping block 51, and the upper end of the split clamping block 51 extends out of the connecting groove 41 and is in contact with the inner diameter of the connecting nut 4 to ensure the reliable connection between the split clamping block 51 and the bolt 3.

[0038] As Figure 3 、 5As shown in FIGS. 6 and 7, in order to reduce the inner diameter of the buckle cylinder 5 to improve the connection quality and reliability, an inner conical surface 42 is provided above the inner ring connection groove 41 of the connection nut 4, and the outer diameter of the top of the split block 51 is an outer conical surface 55. When the connection nut 4 is connected to the buckle cylinder 5, the outer conical surface 55 contacts the inner conical surface 42. By the extrusion between the outer conical surface 55 and the inner conical surface 42, the inner diameter of the buckle cylinder 5 can be reduced, and thus the reliable connection between the insertion rod 3 and the buckle cylinder 5 can be achieved.

[0039] In order to ensure the reliable and stable state of the buckle cylinder 5 when it is locked, the taper of the inner conical surface 42 is adapted to the taper of the outer conical surface 55. The same taper means that there are more contact surfaces between the inner and outer conical surfaces, making the driving and locking of the buckle cylinder 5 more stable and reliable.

[0040] As Figure 2 、 6 As shown in FIGS. 7 and 9, in order to improve the connection reliability and the installation convenience of the insertion rod 3, the insertion rod 3 includes a clamping portion 31 that is clamped with the buckle cylinder 5; a locking portion 56 is provided on the inner diameter of the buckle cylinder 5; after the insertion rod 3 is inserted, the locking portion 56 and the clamping portion 31 form a clamping fit. When the buckle cylinder 5 moves downward and returns under the action of the elastic force, the top opening of the buckle cylinder 5 returns to the initial state. When the top opening returns to a state where the clamping portion 31 can pass through, the buckle cylinder 5 stops moving downward until the insertion rod 3 needs a larger opening to be further inserted. However, during the whole process, the locking portion 56 always tightly holds the clamping portion 3, ensuring the connection reliability.

[0041] As Figure 7 and 9 As shown in FIGS., in order to improve the adaptability of the connecting member, the clamping portion 31 is an outwardly convex annular ratchet structure, and an annular ratchet groove matching the ratchet teeth is provided on the inner diameter of the locking portion 56. Through the cooperation of the annular ratchet teeth and the annular ratchet groove, a non-retractable connection in various relative positions between the clamping portion 31 and the locking portion 56 can be achieved, improving the adaptability of the connecting member.

[0042] As Figure 7 and 8 As shown in FIGS., in order to facilitate the installation of the elastic element, the elastic element 6 is a spring, and a reduced-diameter portion 61 is provided at the top. The buckle cylinder 5 includes a fixed base 53 at the bottom, and a connection hole 57 is provided at the bottom of the fixed base 53. The outer diameter of the reduced-diameter portion 61 is in interference fit with the inner diameter of the connection hole 57.

[0043] The clamping form of the spring of the present utility model with the buckle cylinder 5 is more convenient to install compared with the connection form of screw threading. Moreover, the spring contacts the bottom of the lower sleeve 2 or the pier head, and its elastic force relies on the bottom support, so the elastic force is stronger, ensuring that the upper part of the buckle cylinder 5 tightly abuts against the inclined surface section of the connection nut 4, making the insertion rod 3 bite fully.

[0044] As Figure 3 and 7As shown, in order to improve the reliability of the connection between the spring and the connection hole 57, a convex portion 58 protruding inward is provided on the inner diameter of the connection hole 57, and the convex portion 58 is helically clamped with the outer diameter of the reduced diameter portion 61. The convex portion 58 on the inner diameter of the connection hole 57 can increase the friction between the connection hole 57 and the outer diameter of the spring, thereby improving the reliability of the connection. Embodiment

[0045] As Figure 10 , 11 As shown in FIGS. 12, in order to achieve the quick and reliable connection of the connecting member, the clamping portion 31 is the tapered flange at the bottom of the insertion rod 3, and a clamping surface matching the upper surface of the tapered flange is provided on the inner diameter of the locking portion 56. The reliable and stable connection of the connecting member can be achieved through the surface contact between the upper surface of the tapered flange and the clamping surface, and at the same time, the quick and stable connection between the upper surface of the tapered flange and the clamping surface can be achieved through the calculated position of the tapered flange. Embodiment

[0046] As Figure 1 , 2 As shown in FIGS. 10, a connecting structure for precast concrete components includes a first precast member 7 and a second precast member 8. The first precast member 7 and the second precast member 8 are connected by a connecting member. The connecting member is the above-mentioned plug-type mechanical connecting member. The upper sleeve 1 and the insertion rod 3 of the plug-type mechanical connecting member are provided at one end of the first precast member 7, and the connecting nut 4, the buckle barrel 5 and the elastic element 6 of the plug-type mechanical connecting member are provided at one end of the second precast member 8. The connection between the first precast member 7 and the second precast member 8 through the connecting member can improve the reliability of the connection of the precast concrete components.

[0047] In this specification, the various embodiments are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same and similar parts between the various embodiments, reference can be made to each other. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple. For the relevant parts, reference can be made to the description in the method part.

[0048] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A latch-type mechanical connector, comprising an upper sleeve (1), a lower sleeve (2), an insertion rod (3), a connecting nut (4), a buckle tube (5) and an elastic element (6); the insertion rod (3) is fixedly connected to the upper sleeve (1); the connecting nut (4) sequentially encapsulates the buckle tube (5) and the elastic element (6) inside the lower sleeve (2) from top to bottom; when the upper sleeve (1) and the lower sleeve (2) are connected, the insertion rod (3) passes through the connecting nut (4) and is connected to the buckle tube (5), and two ends of the elastic element (6) are respectively in contact with the bottom of the buckle tube (5) and the bottom of the lower sleeve (2); characterized in that: The top of the buckle tube (5) is connected to the bottom of the connecting nut (4) to form an integral part, and the integral part is a detachable structure; The bottom of the inner ring of the connecting nut (4) is provided with a connecting groove (41); the buckle tube (5) is a hollow cylindrical structure, and the buckle tube (5) comprises a split clamping block (51), an elastic portion (52) and a fixed base (53); a connecting clamping platform (54) is provided on the outer diameter of the split clamping block (51); when the connecting nut (4) is connected to the buckle tube (5), the connecting clamping platform (54) is clamped in the connecting groove (41), and the fixed base (53) is placed outside the connecting groove (41).

2. The latch-type mechanical connector according to claim 1, characterized in that: The height of the connecting groove (41) is greater than the height of the connecting card platform (54) and less than the height of the split card block (51).

3. The latch-type mechanical connector according to claim 1, characterized in that: An inner conical surface (42) is provided above the inner ring connecting groove (41) of the connecting nut (4), and an outer conical surface (55) is provided above the split clamping block (51); when the connecting nut (4) is connected to the buckle tube (5), the outer conical surface (55) contacts the inner conical surface (42).

4. The latch-type mechanical connector according to claim 3, characterized in that: The taper of the inner conical surface (42) matches the taper of the outer conical surface (55).

5. The latch-type mechanical connector according to claim 3, characterized in that: The insertion rod (3) comprises a clamping portion (31) clamped with the buckle tube (5); the buckle tube (5) has a locking portion (56) on its inner diameter; after the insertion rod (3) is inserted, the locking portion (56) and the clamping portion (31) form a clamping fit.

6. The latch-type mechanical connector according to claim 5, characterized in that: The clamping portion (31) is an outwardly protruding annular ratchet structure, and the inner diameter of the locking portion (56) is provided with an annular ratchet groove matching the ratchet.

7. The latch-type mechanical connector according to claim 5, characterized in that: The clamping portion (31) is a conical flange at the bottom of the insertion rod (3), and the inner diameter of the locking portion (56) is provided with a clamping surface matching the upper surface of the conical flange.

8. The latch-type mechanical connector according to any one of claims 1 to 7, characterized in that: The elastic element (6) is a spring, with a reduced diameter portion (61) provided at the top, and a connecting hole (57) provided at the bottom of the buckle tube (5). The outer diameter of the reduced diameter portion (61) is interference fit with the inner diameter of the connecting hole (57).

9. The latch-type mechanical connector according to claim 8, characterized in that: The inner diameter of the connection hole (57) is provided with a protruding portion (58) protruding inwardly, and the protruding portion (58) is spirally clamped with the outer diameter of the reduced diameter portion (61).

10. A prefabricated concrete component connection structure, comprising a first prefabricated component (7) and a second prefabricated component (8), wherein the first prefabricated component (7) and the second prefabricated component (8) are connected via a connecting member, characterized in that: The connector is a latch-type mechanical connector as claimed in any one of claims 1 to 9, wherein an upper sleeve (1) and an insert rod (3) of the latch-type mechanical connector are arranged at one end of the first prefabricated component (7), and a connecting nut (4), a buckle barrel (5) and an elastic element (6) of the latch-type mechanical connector are arranged at one end of the second prefabricated component (8).

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