Connection for connecting precast piles with end plate and precast concrete element

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By adopting a design in which the connecting rod head snaps into the conical surface of the wedge-shaped card and sleeve in the connection of precast piles, the problem of connection instability caused by the inclination of the pile end face is solved, and a gapless and stable connection of precast concrete components is achieved, which improves the pull-out resistance, bending resistance and shear resistance.

CN224591433UActive Publication Date: 2026-08-04LIAONING HENGJIN BUILDING MATERIALS CO LTD

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Patent Information

Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner: LIAONING HENGJIN BUILDING MATERIALS CO LTD
Filing Date: 2026-06-25
Publication Date: 2026-08-04

AI Technical Summary

Technical Problem

In the existing connection of precast concrete components, mechanical joints have problems such as over-insertion or under-insertion of the connecting rod due to the inclination of the pile end face, which leads to unstable connection, affects service life, and may produce gaps or cracks, posing safety hazards.

Method used

The design incorporates a "three-cone integrated" snap-fit structure, where the connecting rod head snap-fit flange contacts the wedge-shaped card and the conical surface of the first connecting sleeve. This structure, combined with the spring's thrust, achieves a gapless connection and ensures coaxiality through the sleeve's guide surface, thereby enhancing its resistance to pull-out, bending, and shearing.

Benefits of technology

It achieves seamless connection of precast concrete components, improves the stability of the connection and its resistance to pull, bending and shear, avoids cracks and safety hazards at the connection, and enhances the mechanical interlocking effect to prevent slippage.

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Abstract

The utility model discloses a connecting piece and prefabricated concrete component for prefabricated pile connection with end head board, wherein the connecting piece includes: connecting rod, connecting sleeve, wedge card and spring, the connecting rod head is equipped with the flange of joint, the connecting sleeve is equipped with taper abutment surface and accommodation cavity in, the accommodation cavity is equipped with wedge card and spring in, the connecting rod head is by the end of connecting sleeve and enters between wedge card, and the outer taper surface of wedge card abuts with taper abutment surface, and the flange of joint forms line contact with the inner taper surface of wedge card. The utility model discloses a connecting piece, because the inner taper surface axial length of wedge card forms the axial fault tolerance distance of connecting rod head and wedge card joint, so that connecting rod head and wedge card between have greater axial fault tolerance distance, when connecting rod and wedge card joint can all effectively joint, eliminate the problem that the existing joint exists and insert or under insert, guarantee prefabricated concrete component connection performance.

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Description

Technical Field

[0001] This utility model relates to the field of precast pile connection technology, and in particular to a connector and precast concrete component for connecting precast piles with end plates. Background Technology

[0002] During the construction process, it is usually necessary to assemble or connect precast concrete components, especially precast concrete components, most of which are multi-section spliced piles. Currently, splicing and connecting precast concrete components is generally achieved through end plate welding or mechanical joints for quick connection.

[0003] However, existing mechanical joints have the following problems: The pile end faces have a certain degree of inclination. The national standard GB13476-2009 specifies the allowable deviation for pipe pile dimensions as follows: for pipe piles with a diameter of 300mm to 700mm, the allowable inclination distance is -2mm to +5mm; for pipe piles with a diameter of 800mm to 1400mm, the allowable inclination distance is -4mm to +7mm. Therefore, when two piles (with diameters between 300mm and 700mm) are joined, considering only the inclination of one pile end face, a maximum gap of 5mm will exist. When the pile end faces are inclination, using existing mechanical joints for concrete pile connections can result in the connecting rod being over-inserted or under-inserted into the clamping device. When the connecting rod of the mechanical joint is over-inserted into the clamping device, an axial gap will exist between the joint of the connecting rod and the clamping device. This will cause a corresponding gap between the connecting end faces of the precast concrete components when subjected to pull-out forces, thus affecting the service life of the precast concrete components. Alternatively, when a concrete pile is subjected to pull-out force, the multiple mechanical joints on the end face of the precast concrete component are subjected to force at different times. That is, one or two mechanical joints on the end face of the precast concrete component are subjected to force first, while the other mechanical joints are not subjected to force. Therefore, the mechanical joints subjected to force first will be damaged first. After the mechanical joints subjected to force first are damaged, the other mechanical joints will be subjected to force in sequence (that is, only one or two mechanical joints are subjected to force at the same time during the entire pull-out process), and may be damaged in sequence. When the connecting rod of the mechanical joint is not fully inserted into the clamping device, there is a possibility that the connecting rod and the clamping device cannot be clamped together, which will cause the connection of the precast concrete component to fail (only one or two mechanical joints at the lower end of the end face of the precast concrete component may be able to be clamped together). Utility Model Content

[0004] This utility model addresses the above-mentioned problems by providing a connector and a precast concrete component for connecting precast piles with end plates. A connector for connecting precast piles with end plates, for mechanical connection of precast concrete components with end plates, comprising: a connecting rod, a first connecting sleeve, a wedge-shaped clip, and a spring; The connecting rod includes a connecting rod seat, a connecting rod head, and a connecting rod head connecting section for connecting the connecting rod seat and the connecting rod head. The connecting rod head connecting section includes a connecting rod guide portion fixedly connected to the connecting rod seat and a connecting rod neck fixedly connected to the connecting rod head. The outer diameter of the connecting rod neck is smaller than the outer diameter of the connecting rod guide portion. The connecting rod head is provided with a connecting rod head snap-fit flange. The wedge-shaped card has an outer side surface, an inner conical surface, an outer conical surface, and an end face. One end of the first connecting sleeve is the insertion end of the connecting rod head, and the first connecting sleeve is provided with a receiving cavity; the end of the receiving cavity facing the insertion end of the connecting rod head is provided with a tapered abutment surface, and the receiving cavity is provided with two or more wedge-shaped cards and a spring that abuts against the end face of the wedge-shaped cards and can apply elastic force to the wedge-shaped cards; the outer wall of the first connecting sleeve is provided with a first end plate connecting part for fixed connection with the end plate. The connecting rod head can be inserted into the space surrounded by two or more wedge-shaped cards through the insertion end of the connecting rod head. Under the elastic force of the spring, the wedge-shaped cards enter the space between the tapered abutment surface and the neck of the connecting rod, so that the outer tapered surface of the wedge-shaped card abuts against the tapered abutment surface of the first connecting sleeve, and the connecting rod head locking flange of the connecting rod head forms a line contact with the inner tapered surface of the wedge-shaped card.

[0005] Furthermore, the connecting rod head has one or more snap-fit flanges.

[0006] Furthermore, a connecting rod transition surface is provided between the connecting rod guide portion and the connecting rod neck; The relationship between the length of the wedge-shaped card and the length of the connecting rod neck is as follows: When the connecting rod head has a locking flange, the length of the wedge-shaped card is greater than the distance between the root of the connecting rod transition surface and the connecting rod head locking flange; When there are multiple connecting rod head locking flanges, the length of the wedge-shaped card is greater than the distance between the root of the connecting rod transition surface and the outermost connecting rod head locking flange.

[0007] Furthermore, the outer diameter of the connecting rod guide portion is the same as the outer diameter of the connecting rod head; the inner wall of the first connecting sleeve facing the insertion end of the connecting rod head is provided with a sleeve first guide surface that cooperates with the connecting rod guide portion, and the axial length of the connecting rod neck is less than the axial length of the sleeve first guide surface.

[0008] Furthermore, it also includes a second connecting sleeve, one end of which is a connecting rod connecting end for threaded connection with the connecting rod seat, and the other end is a closed end; the outer wall of the second connecting sleeve is provided with a second end plate connecting part for fixed connection with the end plate; The other end of the first connecting sleeve is the mounting end, which is provided with a baffle and a retaining ring or a sealing plug.

[0009] Furthermore, the outer diameter of the second end plate connecting part is smaller than the outer diameter of the main body of the second connecting sleeve; the outer diameter of the first end plate connecting part is smaller than the outer diameter of the main body of the first connecting sleeve; both the second end plate connecting part and the first end plate connecting part are provided with external threads.

[0010] Furthermore, a connecting rod clamping part is provided between the connecting rod seat and the connecting rod head connecting section.

[0011] Furthermore, the end of the wedge-shaped card that is inserted toward the head of the connecting rod is provided with a card guide surface.

[0012] Furthermore, the included angle of the connecting rod head engaging flange is an obtuse angle.

[0013] Furthermore, the first connecting sleeve has a tapered second guide surface at one end facing the insertion end of the connecting rod head; and / or the inner wall of the first connecting sleeve has a fluid discharge channel.

[0014] A precast concrete component includes the connector described in this application for connecting precast piles with end plates; Adjacent precast concrete components are anchored together by the connectors used for connecting precast piles with end plates; or, Adjacent precast concrete components are anchored together by the connectors used for connecting precast piles with end plates and the end plates are welded together.

[0015] Compared with the prior art, the connector and precast concrete component for connecting precast piles with end plates described in this utility model have the following advantages: 1. In this application, because the connecting rod head is provided with a connecting rod head snap-fit flange, the wedge-shaped card and the first connecting sleeve are in conical contact. The inner side of the wedge-shaped card is provided with an inner conical surface. The connecting rod head snap-fit flange is in line contact with the inner conical surface of the wedge-shaped card. After the connecting rod, wedge-shaped card and first connecting sleeve are snapped together, the connecting rod head forms a line contact (line snap-fit) on the inner conical surface of the wedge-shaped card. The connecting rod head snap-fit flange, the wedge-shaped card and the first connecting sleeve form a "three-cone integrated" snap-fit structure. Because the connecting rod head snap-fit flange is in line contact with the inner conical surface of the wedge-shaped card... Furthermore, the length of the inner conical surface of the wedge-shaped card is much greater than the allowable dimensional deviation of the precast pile end face specified in the existing national standard. That is, the axial length of the inner conical surface of the wedge-shaped card forms the axial tolerance distance for the connection between the head of the connecting rod and the wedge-shaped card. This results in a large axial tolerance distance between the head of the connecting rod and the wedge-shaped card. Consequently, when the connecting rod is engaged with the first connecting sleeve and the wedge-shaped card, the connecting rod head engagement flange can effectively engage with the inner conical surface of the wedge-shaped card. There will be no over-insertion or under-insertion problem between the head of the connecting rod and the wedge-shaped card, thus ensuring the connection performance between precast concrete components.

[0016] Simultaneously, under the thrust of the spring, the wedge-shaped card can completely engage with the space between the head of the connecting rod and the tapered contact surface of the first connecting sleeve, thus achieving a truly gapless zero-point positioning connection between the head of the connecting rod, the wedge-shaped card, and the first connecting sleeve. Therefore, when using the connector disclosed in this utility model for connecting precast piles with end plates to connect precast concrete components, the connection of the precast concrete components will not crack or develop fissures under tensile, shear, or bending forces. In other words, using the connector disclosed in this utility model for connecting precast piles with end plates to connect precast concrete components ensures that the pile connection exhibits high tensile, bending, and shear resistance. Furthermore, it eliminates the problem of gaps generated during the connection of precast concrete components due to existing mechanical joint mechanisms, which can cause cracks at the joints of precast concrete components and lead to safety hazards in the building pile foundation. Furthermore, line contact allows the mechanical joint to concentrate the force on a tiny area when subjected to tension, generating extremely high local pressure. This high pressure causes the material in the contact area to undergo minute elastic or plastic deformation, which microscopically promotes the interlocking of surface rough peaks, forming a "mechanical interlocking" effect. This interlocking significantly increases the sliding resistance, preventing the joint from slipping under force and avoiding connection failure caused by the wedge-shaped card being squeezed out.

[0017] 2. The connector for connecting precast piles with end plates disclosed in this application, since the connecting rod seat of the connecting rod is threadedly connected to the second connecting sleeve, can adjust the length of the connecting rod at the end of the precast concrete component by adjusting the length of the connection between the connecting rod seat and the second connecting sleeve. This allows the connector for connecting precast piles with end plates to be used for connecting different types of precast concrete components (the end plate thickness of different types of precast concrete components will be different). In other words, the connector for connecting precast piles with end plates disclosed in this application can realize the connection of different types of precast concrete components using a connector of one specification for connecting precast piles with end plates.

[0018] 3. The connector disclosed in this application for connecting precast piles with end plates has a first guide surface inside the first connecting sleeve. Even if the connecting rod is not fully inserted, it can still guide the connecting rod sufficiently, with a larger fault tolerance space. This prevents the connecting rod from being inserted eccentrically relative to the first connecting sleeve, and keeps the wedge-shaped card in the same axial position as much as possible during the insertion process, ensuring the success rate of insertion and thus improving the bending and shear resistance of the connected pile.

[0019] 4. When using the connector disclosed in this application for connecting precast piles with end plates to connect precast concrete components, the end plate welding and mechanical joint anchoring connection can be achieved between adjacent precast concrete components, which further improves the pull-out resistance, bending resistance and shear resistance of the precast concrete components. Attached Figure Description

[0020] Figure 1 This is a front view of a first embodiment of the connector for connecting precast piles with end plates disclosed in this utility model; Figure 2 This is a cross-sectional view of a first embodiment of the connector for connecting precast piles with end plates disclosed in this utility model. Figure 3 This is a front view of the connecting rod in the connector for connecting precast piles with end plates disclosed in this utility model; Figure 4 This is a front view of the first connecting sleeve in the connector for connecting precast piles with end plates disclosed in this utility model; Figure 5 This is a cross-sectional view of the first connecting sleeve in the connector for connecting precast piles with end plates disclosed in this utility model; Figure 6 This is a top view of the wedge-shaped card in the connector for connecting precast piles with end plates disclosed in this utility model. The number of wedges in the figure is 4. Figure 7This is a front view of the wedge-shaped card in the connector for connecting precast piles with end plates disclosed in this utility model; Figure 8 This is a front view of the spring in the connector for connecting precast piles with end plates disclosed in this utility model. Figure 9 This is a top view of the spring in the connector for connecting precast piles with end plates disclosed in this utility model; Figure 10 This is a structural diagram of a second embodiment of the connector for connecting precast piles with end plates disclosed in this utility model; Figure 11 This is a structural diagram of the connecting rod in a second embodiment of the connector for connecting precast piles with end plates disclosed in this utility model; Figure 12 This is a structural diagram of a third embodiment of the connector for connecting precast piles with end plates disclosed in this utility model; Figure 13 for Figure 12 A sectional view; Figure 14 This is a front view of the second connecting sleeve in a third embodiment of the connector for connecting precast piles with end plates disclosed in this utility model. Figure 15 This is a cross-sectional view of the second connecting sleeve in a third embodiment of the connector for connecting precast piles with end plates disclosed in this utility model. Figure 16 This is a structural diagram of the fourth embodiment of the connector for connecting precast piles with end plates disclosed in this utility model; Figure 17 This is a front view of an embodiment of connecting precast concrete components using the connector for connecting precast piles with end plates disclosed in this utility model. Only the end plate and mechanical joint structure are shown in the figure. Figure 18 for Figure 17 A sectional view; Figure 19 This is a front view of another embodiment of the connector for connecting precast piles with end plates disclosed in this utility model, showing only the end plate and mechanical joint structure. In the figure: 1. Connecting rod; 10. Connecting rod seat; 11. Connecting rod head; 110. Connecting rod head snap-fit flange; 111. End face of connecting rod head; 12. Connecting rod head connecting section; 120. Connecting rod guide; 121. Connecting rod neck; 122. Connecting rod transition surface; 13. Connecting rod clamping part; 14. Connecting rod head snap-fit part; 2. Second connecting sleeve; 20. Connecting rod connecting end; 21. Second end plate connecting part; 22. Closed end; 3. First connecting sleeve; 30. Connecting rod head insertion end; 31. Receiving cavity; 3 2. Tapered contact surface; 33. First end plate connecting part; 34. First guide surface of sleeve; 35. Mounting end; 36. Baffle; 37. Snap ring; 371. Snap ring mounting groove; 38. Second guide surface of sleeve; 39. Insertion cavity; 4. Wedge-shaped card; 40. Outer side of card; 41. Inner conical surface of card; 42. Outer conical surface of card; 43. End face of wedge-shaped card; 44. Guide surface of card; 45. Inner side of card; 46. Wedge-shaped card insertion end; 5. Spring; 6. End plate. Detailed Implementation

[0021] Example 1 like Figure 1 and Figure 2 As shown, the first embodiment of the connector for connecting precast piles with end plates disclosed in this application includes: a connecting rod 1, a first connecting sleeve 3, a wedge-shaped clip 4, and a spring 5; The connecting rod 1 includes a connecting rod seat 10, a connecting rod head 11, and a connecting rod head connecting section 12 for connecting the connecting rod seat 10 and the connecting rod head 11. The connecting rod head connecting section 12 includes a connecting rod guide portion 120 fixedly connected to the connecting rod seat 10 and a connecting rod neck 121 fixedly connected to the connecting rod head 11. The outer diameter of the connecting rod neck 121 is smaller than the outer diameter of the connecting rod guide portion 120. A connecting rod head snap-fit flange 110 is provided on the connecting rod head 11. One end of the first connecting sleeve 3 is the insertion end 30 of the connecting rod head, and the first connecting sleeve 3 is provided with a receiving cavity 31; the end of the receiving cavity 31 facing the insertion end 30 of the connecting rod head is provided with a tapered abutment surface 32, and the receiving cavity 31 is provided with two or more wedge-shaped cards 4 and a spring 5 that abuts against the end face 43 of the wedge-shaped cards and can apply elastic force to the wedge-shaped cards 4; the outer wall of the first connecting sleeve 3 is provided with a first end plate connecting part 33 for fixed connection with the end plate. The wedge-shaped card 4 is provided with an outer card surface 40, an inner card conical surface 41, an outer card conical surface 42, and a wedge-shaped card end face 43; The connecting rod head 11 can be inserted into the space surrounded by two or more wedge-shaped cards 4 through the connecting rod head insertion end 30. Under the elastic force of the spring 5, the wedge-shaped card 4 enters the space between the tapered abutment surface 32 and the connecting rod neck 121, so that the outer tapered surface 42 of the wedge-shaped card 4 abuts against the tapered abutment surface 32 of the first connecting sleeve 3, and the connecting rod head locking flange 110 on the connecting rod head 11 forms a line contact with the inner tapered surface 42 of the wedge-shaped card 4.

[0022] Specifically, such as Figure 3 As shown, the connecting rod 1 includes a connecting rod seat 10, a connecting rod head 11, and a connecting rod head connecting section 12 for connecting the connecting rod seat 10 and the connecting rod head 11. The connecting rod seat 10 is provided with an external thread for threaded connection with the second connecting sleeve. One end of the connecting rod seat 10 is provided with the connecting rod head connecting section 12, and the other end of the connecting rod head connecting section 12 is provided with the connecting rod head 11. The connecting rod head connecting section 12 includes a connecting rod guide portion 120 fixedly connected to the connecting rod seat 10 and a connecting rod head 11 fixedly connected to the connecting rod seat 10. The connecting rod neck 121 is connected, and the outer diameter of the connecting rod neck 121 is smaller than the outer diameter of the connecting rod guide portion 120. The end of the connecting rod head 11 is provided with a guide surface for easy guidance. The side of the connecting rod head 11 facing the connecting rod head connecting section 12 is the connecting rod head locking portion 14. The connecting rod head locking portion 14 is radially recessed from one end of the connecting rod head 11 to one end of the connecting rod head connecting section 12. The flange between the connecting rod head locking portion 14 and the outer wall surface of the connecting rod head 11 forms a connecting rod head locking flange 110.

[0023] like Figure 4 and Figure 5 As shown, one end of the first connecting sleeve 3 is the insertion end 30 of the connecting rod head. The first connecting sleeve 3 has a receiving cavity 31, and the space between the receiving cavity 31 and the insertion end 30 of the connecting rod head is an insertion cavity 39. The inner diameter of the receiving cavity 31 is larger than the inner diameter of the insertion cavity 39. The receiving cavity 31 has a tapered abutment surface 32 at one end facing the insertion end 30 of the connecting rod head; that is, the tapered surface that slopes between the insertion cavity 39 and the receiving cavity 31 is the tapered abutment surface 32. The receiving cavity 31 contains two or more wedge-shaped cards 4 and springs 5 that abut against the end faces 43 of the wedge-shaped cards and can apply elastic force to the wedge-shaped cards 4. The springs 5 can be tower springs, rectangular springs, or other forms of elastic structures, preferably, such as 8 and... Figure 9 As shown, a rectangular spring is used; the outer wall of the first connecting sleeve 3 is provided with a first end plate connecting part 33 at one end near the insertion end 30 of the connecting rod head, and the first connecting sleeve 3 is fixedly connected to the end plate 6 through the first end plate connecting part 33. like Figure 6 and Figure 7As shown, the wedge-shaped card 4 is provided with an outer card surface 40, an inner card conical surface 41, an outer card conical surface 42, and a wedge-shaped card end face 43; the taper of the outer card conical surface 42 of the wedge-shaped card 4 is greater than the taper of the inner card conical surface 41, so that the wedge-shaped card 4 forms a wedge-shaped structure that is thin at one end and thick at the other end. The thinner end is the card wedged end 46. In this embodiment, the wedge-shaped card 4 also includes an inner card surface 45. The connecting rod head 11 can be inserted into the space surrounded by two or more wedge-shaped cards 4 through the connecting rod head insertion end 30. Under the elastic force of the spring 5, the wedge-shaped card 4 enters the space between the tapered contact surface 32 and the connecting rod neck 121, so that the outer tapered surface 42 of the wedge-shaped card 4 abuts against the tapered contact surface 32 of the first connecting sleeve 3, the wedge-shaped card 4's wedge-in end 46 abuts against the connecting rod transition surface 122 between the connecting rod neck 121 and the connecting rod guide part 120, and the connecting rod head locking flange 110 on the connecting rod head 11 forms a line contact with the inner tapered surface 41 of the wedge-shaped card 4. The connector disclosed in this application for connecting precast piles with end plates has a connecting rod head engaging flange 110 on the connecting rod head 11. The wedge-shaped card 4 and the first connecting sleeve 3 have a conical contact. The inner side of the wedge-shaped card 4 has an inner conical surface 41. The connecting rod head engaging flange 110 and the inner conical surface 41 of the wedge-shaped card 4 are in line contact. After the connecting rod 1, the wedge-shaped card 4 and the first connecting sleeve 3 are engaged, the connecting rod head 11 forms a line contact (line engagement) on the inner conical surface 41 of the wedge-shaped card 4. The connecting rod head engaging flange 110, the wedge-shaped card 4 and the tapered contact surface 32 of the first connecting sleeve 3 form a "three-cone integrated" engagement structure. The inner conical surface 41 of the wedge card 4 is in line contact, and the length of the inner conical surface 41 of the wedge card 4 is much larger than the allowable dimensional deviation of the precast pile end face specified in the existing national standard. This makes it possible for the connecting rod head 11 to form a line contact between the connecting rod head 11's connecting rod head engaging flange 110 and the inner conical surface 41 of the wedge card 4 when the connecting rod head 11 is inserted into the space enclosed by the wedge card 4. In other words, the connecting rod head 11 and the wedge card 4 have a large axial tolerance distance in this application. Therefore, when the connecting rod 1 engages with the first connecting sleeve 3 and the wedge card 4, the connecting rod head 11 of the connecting rod 1 can effectively engage with the wedge card 4, and there will be no problem of over-insertion or under-insertion between the connecting rod head 11 and the wedge card 4, thus ensuring the connection performance between precast concrete components.

[0024] Simultaneously, under the pushing force of the spring 5, the wedge-shaped card 4 can be completely inserted into the space between the connecting rod head 11 and the tapered contact surface 32 of the first connecting sleeve 3, thereby achieving a truly gapless zero-point positioning connection between the connecting rod head 11, the wedge-shaped card 4, and the first connecting sleeve 3. Therefore, when using the connector disclosed in this utility model for connecting precast piles with end plates to connect precast concrete components, the connection of the precast concrete components will not crack or produce fissures when subjected to tensile, shear, or bending forces. In other words, using the connector disclosed in this utility model for connecting precast piles with end plates to connect precast concrete components can ensure that the pile connection has high tensile, bending, and shear resistance. It also eliminates the problem of gaps generated in the connection mechanism of existing mechanical joints, which cause cracks at the joints of precast concrete components, leading to safety hazards in the building pile foundation. Furthermore, line contact allows the mechanical joint to concentrate the force on a tiny area when subjected to tension, generating extremely high local pressure. This high pressure causes the material in the contact area to undergo minute elastic or plastic deformation, which microscopically promotes the interlocking of surface rough peaks, forming a "mechanical interlocking" effect. This interlocking significantly increases the sliding resistance, preventing the joint from slipping under force and avoiding connection failure caused by the wedge-shaped card being squeezed out.

[0025] Furthermore, such as Figure 2 , Figure 3 and Figure 7 As shown, a connecting rod transition surface 122 is provided between the connecting rod guide portion 120 and the connecting rod neck 121; The relationship between the length of the wedge-shaped card 4 and the length of the connecting rod neck 121 is as follows: The length of the wedge-shaped card 4 is greater than the distance between the root of the connecting rod transition surface 122 and the connecting rod head engaging flange 110.

[0026] Specifically, in this embodiment, since the length of the wedge-shaped card 4 is greater than the distance between the root of the connecting rod transition surface 122 between the connecting rod neck 121 and the connecting rod guide portion 120 and the connecting rod head engaging flange 110, that is, when the card wedge end 46 of the wedge-shaped card 4 abuts against the connecting rod transition surface 122, one end of the wedge-shaped card end face 43 of the wedge-shaped card 4 is located on the side of the connecting rod head engaging flange 110 near the end of the connecting rod head 11. This ensures that regardless of the state of the connecting rod 1 and the wedge-shaped card 4 (the card wedge end 46 of the wedge-shaped card 4 abuts against the connecting rod transition surface 122 or the card wedge end 46 of the wedge-shaped card 4 does not abut against the connecting rod transition surface 122), the connecting rod head engaging flange 110 of the connecting rod head 11 and the card inner conical surface 41 of the wedge-shaped card 4 can form a line contact.

[0027] Furthermore, the outer diameter of the connecting rod guide portion 120 is the same as the outer diameter of the connecting rod head 11; the inner wall of the first connecting sleeve 3 facing the insertion end 30 of the connecting rod head is provided with a sleeve first guide surface 34 that cooperates with the connecting rod guide portion 120, and the axial distance of the connecting rod neck 121 is less than the axial length of the sleeve first guide surface 34.

[0028] Specifically, such as Figure 3 As shown, the connecting rod head connecting section 12 includes a connecting rod guide portion 120 and a connecting rod neck 121. One end of the connecting rod guide portion 120 is connected to the connecting rod seat 10, and the other end of the connecting rod guide portion 120 is the connecting rod neck 121. The other end of the connecting rod neck 121 is provided with a connecting rod head 11. The outer diameter of the connecting rod neck 121 is smaller than the outer diameter of the connecting rod guide portion 120, thus forming a wedge-shaped card clearance space. This ensures that when the connecting rod head 11 is inserted into the space surrounded by two or more wedge-shaped cards 4, the wedge-shaped cards 4 can be engaged between the connecting rod head 11 and the first connecting sleeve 3, so that the connecting rod head 11, the wedge-shaped cards 4, and the first connecting sleeve 3 truly achieve a gapless zero-point positioning connection. Further, as... Figure 4 As shown, the inner wall of the first connecting sleeve 3 is provided with a first sleeve guide surface 34 (i.e., the inner wall surface of the insertion cavity 39 forms a guide surface) that cooperates with the connecting rod guide portion 120. The outer diameter of the connecting rod guide portion 120 is the same as the outer diameter of the connecting rod head 11. The axial distance from the edge of the connecting rod head 11 to the connecting rod guide portion 120 is less than the axial length of the first sleeve guide surface 34. During the insertion process, the edge of the connecting rod head 11 first enters the first guide surface 34 of the sleeve. The first guide surface 34 guides the connecting rod 1 through the edge of the connecting rod head 11. Before the edge of the connecting rod head 11 leaves the first guide surface 34, the connecting rod guide part 120 enters the first guide surface 34. The first guide surface 34 guides the connecting rod 1 through the edge of the connecting rod head 11 and the connecting rod guide part 120, preventing the connecting rod 1 from radially shifting or swaying. Subsequently, the edge of the connecting rod head 11 passes through the first guide surface 34 of the sleeve. The first guide surface 34 continues to guide the connecting rod 1 through the connecting rod guide part 120, ensuring that the connecting rod 1 is guided by the first guide surface 34 of the sleeve throughout the insertion process. Under the premise of high coaxiality with the first connecting sleeve 3, the wedge-shaped card 4 is opened, avoiding the connection failure caused by the connecting rod 1 being unable to rebound due to radial shift or swaying.

[0029] like Figure 2 , Figure 3 and Figure 4As shown, one end of the first connecting sleeve 3 is the connecting rod head insertion end 30, and the other end is the mounting end 35. The mounting end 35 is equipped with a baffle 36 and a retaining ring 37. The wedge-shaped card 4 and the spring 5 can be inserted into the receiving cavity 31 from the mounting end 35. After the wedge-shaped card 4 and the spring 5 are inserted into the receiving cavity 31, the baffle 36 is placed in and the retaining ring 37 is used to lock them in place, so that one end of the spring 5 abuts against the end of the wedge-shaped card 4, and the other end abuts against the baffle 36. Simultaneously, the baffle 36 and the retaining ring 37 enable... The mounting end of the first connecting sleeve 3 is also a closed end to effectively prevent concrete slurry from entering the first connecting sleeve. The retaining ring 37 can be an elastic structure. The mounting end 35 of the first connecting sleeve 3 has a retaining ring mounting groove 371. The retaining ring 37 is installed in the retaining ring mounting groove 371 to limit the baffle 36. Alternatively, the retaining ring 37 has external threads, and the mounting end 35 of the first connecting sleeve 3 has internal threads. The retaining ring 37 is threaded to the mounting end 35 to limit the baffle 36. In this embodiment, the mounting end 35 of the first connecting sleeve 3 can also be provided with a sealing plug. That is, the mounting end 35 of the first connecting sleeve 3 has threads, and the sealing plug also has threads. The sealing plug is threaded to the mounting end 35 of the first connecting sleeve 3 to close the mounting end 35.

[0030] Furthermore, the outer diameter of the first end plate connecting part 33 is smaller than the outer diameter of the main body of the first connecting sleeve 3; the first end plate connecting part 33 is provided with external threads.

[0031] Specifically, the main body of the first connecting sleeve 3 has a polygonal structure. The outer wall of the first connecting sleeve 3 near the insertion end 30 of the connecting rod head is the first end plate connecting part 33. The first end plate connecting part 33 is provided with external threads, and the first connecting sleeve 3 is threadedly connected to the end plate. The outer diameter of the first end plate connecting part 33 is smaller than the outer diameter of the main body of the connecting sleeve, so that it forms a stop structure. The external threads on the first end plate connecting part 33 facilitate quick connection between the connecting sleeve and the threaded hole on the end plate 6. Alternatively, the first end plate connecting part 33 may not be provided with external threads, and the first connecting sleeve 3 can be fixedly connected to the end plate by welding or gluing.

[0032] Furthermore, a connecting rod clamping part 13 is provided between the connecting rod seat 10 and the connecting rod head connecting section 12.

[0033] Specifically, such as Figure 3As shown, the connecting rod seat 10 and the connecting rod head section 12 of the connecting rod 1 are also provided with a connecting rod clamping part 13. The clamping structure can generally be arranged in a clamping plane with opposite sides. Preferably, the clamping structure is a polygonal column structure, so as to facilitate clamping with tools such as wrenches to connect the connecting rod to other components by threads. Preferably, the diameter of the outer circle of the connecting rod clamping part 13 is smaller than the inner diameter of the large diameter end of the second guide surface 38 of the first connecting sleeve 3. That is, the inner diameter of the side of the first connecting sleeve 3 near the insertion end of the connecting rod head is larger than the outer circle diameter of the connecting rod clamping part. This allows the end of the first connecting sleeve to accommodate the connecting rod clamping part when the connecting rod is engaged with the first connecting sleeve and the wedge-shaped card, providing a larger tolerance space for the insertion of the connecting rod 1.

[0034] Furthermore, the end of the wedge-shaped card 4 that is inserted toward the head of the connecting rod is provided with a card guide surface 44.

[0035] Specifically, such as Figure 7 As shown, the end of the wedge-shaped card 4 that is inserted toward the head 11 of the connecting rod is provided with a card guide surface 44 so that the head of the connecting rod can be inserted into the space enclosed by multiple wedge-shaped cards 4.

[0036] Furthermore, the included angle of the connecting rod head engaging flange 110 is an obtuse angle.

[0037] Specifically, such as Figure 3 As shown, the included angle of the connecting rod head engaging flange 110 is an obtuse angle, preferably 120 degrees. Setting these included angles to obtuse angles ensures that all line contacts are obtuse angle contacts. Under high pressure, the deformation is smaller, and a stable line contact engagement structure can be achieved with minimal deformation. This creates a mechanical interlock between the connecting rod, the wedge-shaped clip, and the first connecting sleeve, while also preventing further deformation under tensile force and enhancing the stability of the connection.

[0038] Furthermore, the first connecting sleeve 3 has a tapered second guide surface 38 at one end facing the insertion end 30 of the connecting rod head; and / or the inner wall of the first connecting sleeve 3 has a fluid discharge channel.

[0039] Specifically, such as Figure 5As shown, the first connecting sleeve 3 has a tapered second guide surface 38 at one end facing the insertion end 30 of the connecting rod head. The second guide surface 38 can limit the connecting rod 1 within a certain radial range during the insertion process, preventing the connecting rod from radially deviating. Preferably, the inner wall of the first connecting sleeve 3 is provided with a fluid discharge channel, that is, a fluid discharge channel is provided on the inner wall of the insertion cavity 39. Since structural adhesive is applied and injected into the connecting sleeve during the pile connection process, the fluid discharge channel can be used to discharge gas and structural adhesive and other fluids inside the first connecting sleeve during the insertion process. The fluid discharge channel can be an axial groove provided on the inner wall of the first connecting sleeve, or the first guide surface of the sleeve can be set as a prism-shaped surface, in which case the corners of the prism-shaped surface form a fluid discharge channel, or multiple array-shaped protrusions can be provided on the first guide surface of the sleeve, and the gaps between the protrusions form interlaced fluid discharge channels. Regardless of the form, as long as stable fluid discharge can be achieved during the insertion of the connecting rod into the first connecting sleeve, it is acceptable. Preferably, the fluid discharge channels are uniformly arranged in the circumferential direction. The fluid discharge channel design ensures that the structural adhesive is evenly discharged from multiple circumferential locations, preventing rapid compression and pressure surges within the first connecting sleeve during rapid insertion. This avoids uneven localized force, which could obstruct the wedge-shaped card and prevent proper insertion, leading to insertion failure. In this embodiment, the first guide surface 34 of the sleeve is cylindrical, with a diameter slightly larger than that of the connecting rod guide portion 120. A tapered second guide surface 38 is provided on the inner end of the first connecting sleeve 3 facing the insertion end 30 of the connecting rod head. The tapered second guide surface 38 cooperates with the cylindrical first guide surface 34 to form a funnel-shaped internal space, providing greater tolerance for the insertion of the connecting rod 1 and ensuring higher coaxiality between the connecting rod 1 and the first connecting sleeve 3 even when insertion is incomplete.

[0040] Example 2 like Figure 10 and Figure 11The diagram shown is a structural diagram of a second embodiment of the connector for connecting precast piles with end plates disclosed in this application. The difference between this embodiment and embodiment 1 is that, in embodiment 1, the connecting rod 1 includes a connecting rod seat 10, a connecting rod head 11, and a connecting rod head connecting section 12. The side of the connecting rod head 11 facing the connecting rod head connecting section 12 is a connecting rod head locking part 14. The connecting rod head locking part 14 is radially recessed from one end of the connecting rod head 11 to one end of the connecting rod head connecting section 12. The flange between the connecting rod head locking part 14 and the outer wall surface of the connecting rod head 11 forms a connecting rod head locking flange 110. In this embodiment, in addition to the flange between the connecting rod head locking part 14 and the outer wall surface of the connecting rod head 11 forming a connecting rod head locking flange 110, the connecting rod head locking part 14 is also provided with one or more rings of outwardly protruding tooth-shaped protrusions. The flange between the connecting rod head locking part and the outer wall surface of the connecting rod head and the tooth-shaped protrusions on the connecting rod head locking part form multiple (in this application, multiple includes two or more) connecting rod head locking flanges 110. The number of connecting rod head locking flanges 110 in the figure is 2. In this embodiment, since the connecting rod head snap-fit flange 110 has multiple (i.e., two or more), the contact area between the connecting rod head 11 and the inner conical surface 41 of the wedge-shaped card 4 is increased, further forming multiple linear contact areas. As a result, when the connecting rod 1 is subjected to a pulling force, the multiple lines of contact work together to generate extremely high local pressure. The high pressure causes the material in the contact area to undergo slight elastic or plastic deformation, which microscopically promotes the interlocking of surface rough peaks, forming a "mechanical interlocking" effect. This interlocking significantly increases the sliding resistance, so that the joint will not slip when subjected to force, avoiding connection failure caused by the wedge-shaped card being squeezed out.

[0041] In this embodiment, a connecting rod transition surface 122 is provided between the connecting rod guide portion 120 and the connecting rod neck 121; The relationship between the length of the wedge-shaped card 4 and the length of the connecting rod neck 121 is as follows: The length of the wedge-shaped card 4 is greater than the distance between the root of the connecting rod transition surface 122 and the outermost connecting rod head engaging flange 110.

[0042] Specifically, such as Figure 10 and Figure 11As shown, in this embodiment, since the length of the wedge-shaped card 4 is greater than the distance from the root of the connecting rod transition surface 122 between the connecting rod neck 121 and the connecting rod guide portion 120 to the outermost connecting rod head engaging flange 110, that is, when the card wedge end 46 of the wedge-shaped card 4 abuts against the connecting rod transition surface 122, one end of the wedge-shaped card end face 43 of the wedge-shaped card 4 is located on the side of the outermost connecting rod head engaging flange 110 near the end of the connecting rod head 11, it can be made so that regardless of the connecting rod Regardless of the state of the wedge card 1 and the wedge card 4 (wedge card 4 wedge end 46 abutting against connecting rod transition surface 122 or wedge card 4 wedge end 46 not abutting against connecting rod transition surface 122), it can be ensured that the connecting rod head locking flange 110 of the connecting rod head 11 and the inner conical surface 41 of the wedge card 4 form a line contact. In this embodiment, the outermost connecting rod head locking flange 110 refers to the connecting rod head locking flange 110 closest to the end face 111 of the connecting rod head.

[0043] Example 3 like Figure 12 and Figure 13 The diagram shown is a structural diagram of a third embodiment of the connector for connecting precast piles with end plates disclosed in this application. The difference between this embodiment and embodiment 1 is that the connector for connecting precast piles with end plates disclosed in this embodiment further includes a second connecting sleeve 2; specifically, as shown... Figure 14 and Figure 15 As shown, one end of the second connecting sleeve 2 is the connecting rod connecting end 20. The second connecting sleeve 2 has an internal thread for threaded connection with the connecting rod seat 10. The side of the outer wall of the second connecting sleeve 2 near the connecting rod connecting end 20 is the second end plate connecting part 21. The second connecting sleeve 2 can be fixedly connected to the end plate through the second end plate connecting part 21.

[0044] The connector for connecting precast piles with end plates disclosed in this embodiment has a connection between the connecting rod seat 10 of the connecting rod 1 and the second connecting sleeve 2. Therefore, by adjusting the length of the connection between the connecting rod seat 10 and the second connecting sleeve 2, the length of the connecting rod 1 outside the end of the precast concrete component can be adjusted. This allows the connector for connecting precast piles with end plates to be used for connecting different types of precast concrete components (the end plate thickness of different types of precast concrete components will be different). In other words, the connector for connecting precast piles with end plates disclosed in this application can realize the connection of different types of precast concrete components using a connector of one specification for connecting precast piles with end plates. In a specific embodiment, in order to make the length of the first end plate connecting part 33 of the first connecting sleeve 3 and the second end plate connecting part 21 of the second connecting sleeve 2 suitable for end plates 6 of different models (thicknesses), shims or springs can be provided between the first connecting sleeve 3 and the end plate 6 and between the second connecting sleeve 2 and the end plate 6 to adjust the connection length between the end plate connecting part and the end plate 6, thereby enabling the connector disclosed in this application for connecting precast piles with end plates to connect precast concrete components of different models (precast concrete components with end plates 6 of different thicknesses).

[0045] Furthermore, the other end of the second connecting sleeve 2 is a closed end 22; The other end of the first connecting sleeve 3 is the mounting end 35, which is provided with a baffle 36 and a retaining ring 37 or a sealing plug.

[0046] Specifically, such as Figure 14 and Figure 15 As shown, one end of the second connecting sleeve 2 is a connecting rod connecting end 20 for threaded connection with the connecting rod seat 10, and the other end is a closed end 22. When the concrete pile is poured, the closed end 22 faces the concrete pile body. Since it is set as a closed end 22, it can effectively prevent concrete slurry from entering the second connecting sleeve.

[0047] Furthermore, the outer diameter of the second end plate connecting part 21 is smaller than the outer diameter of the main body of the second connecting sleeve 2; the second end plate connecting part 21 is provided with external threads.

[0048] Specifically, the main body of the second connecting sleeve 2 has a polygonal structure. The outer wall of the second connecting sleeve 2 near the connecting end 20 of the connecting rod is the second end plate connecting part 21. The second end plate connecting part 21 is provided with external threads, and the second connecting sleeve 2 is threadedly connected to the end plate. The outer diameter of the second end plate connecting part 21 is smaller than the outer diameter of the main body of the connecting sleeve, thus forming a stop structure. The external threads on the second end plate connecting part 21 facilitate quick connection between the connecting sleeve and the threaded hole on the end plate 6. Alternatively, the second end plate connecting part 21 may not have external threads, and the second connecting sleeve 2 can be fixedly connected to the end plate by welding or gluing.

[0049] Example 4 like Figure 16 The diagram shown is a structural diagram of the fourth embodiment of the connector for connecting precast piles with end plates disclosed in this application. The difference between this embodiment and embodiment 3 is that, in embodiment 3, the connecting rod 1 includes a connecting rod seat 10, a connecting rod head 11, and a connecting rod head connecting section 12. The side of the connecting rod head 11 facing the connecting rod head connecting section 12 is a connecting rod head locking part 14. The connecting rod head locking part 14 is radially recessed from one end of the connecting rod head 11 to one end of the connecting rod head connecting section 12. The flange between the connecting rod head locking part 14 and the outer wall surface of the connecting rod head 11 forms a connecting rod head locking flange 110. In this embodiment, in addition to the flange between the connecting rod head locking part 14 and the outer wall surface of the connecting rod head 11 forming a connecting rod head locking flange 110, the connecting rod head locking part 14 is also provided with one or more rings of outwardly protruding tooth-shaped protrusions. The flange between the connecting rod head locking part and the outer wall surface of the connecting rod head and the tooth-shaped protrusions on the connecting rod head locking part form two or more connecting rod head locking flanges 110. In the figure, the number of connecting rod head locking flanges 110 is 2. In this embodiment, since the connecting rod head has two or more locking flanges 110, the contact area between the connecting rod head 11 and the inner conical surface 41 of the wedge-shaped card 4 is increased, further forming a multi-ring linear contact area. As a result, when the connecting rod 1 is subjected to a pulling force, the multiple lines of contact work together to generate extremely high local pressure. The high pressure causes the material in the contact area to undergo slight elastic or plastic deformation, which microscopically promotes the interlocking of surface rough peaks, forming a "mechanical interlocking" effect. This interlocking significantly increases the sliding resistance, so that the joint will not slip when subjected to force, avoiding connection failure caused by the wedge-shaped card being squeezed out.

[0050] In this embodiment, a connecting rod transition surface 122 is provided between the connecting rod guide portion 120 and the connecting rod neck 121; The relationship between the length of the wedge-shaped card 4 and the length of the connecting rod neck 121 is as follows: The length of the wedge-shaped card 4 is greater than the distance between the root of the connecting rod transition surface 122 and the outermost connecting rod head engaging flange 110.

[0051] Specifically, such as Figure 10 and Figure 11 As shown, in this embodiment, since the length of the wedge-shaped card 4 is greater than the distance from the root of the connecting rod transition surface 122 between the connecting rod neck 121 and the connecting rod guide portion 120 to the outermost connecting rod head engaging flange 110, that is, when the card wedge end 46 of the wedge-shaped card 4 abuts against the connecting rod transition surface 122, one end of the wedge-shaped card end face 43 of the wedge-shaped card 4 is located on the side of the outermost connecting rod head engaging flange 110 near the end of the connecting rod head 11, it can be made so that regardless of the connecting rod Regardless of the state of the wedge card 1 and the wedge card 4 (wedge card 4 wedge end 46 abutting against connecting rod transition surface 122 or wedge card 4 wedge end 46 not abutting against connecting rod transition surface 122), it can be ensured that the connecting rod head locking flange 110 of the connecting rod head 11 and the inner conical surface 41 of the wedge card 4 form a line contact. In this embodiment, the outermost connecting rod head locking flange 110 refers to the connecting rod head locking flange 110 closest to the end face 111 of the connecting rod head.

[0052] Example 5 A precast concrete component is connected using the connectors for connecting precast piles with end plates disclosed in Embodiments 3 and 4 of this application.

[0053] like Figure 17 and Figure 18 As shown, the connector disclosed in this application for connecting precast piles with end plates is used to connect precast concrete components. The precast concrete component body has end plates 6 at both ends, and the main reinforcement bars in the precast concrete component body are fixedly connected to the end plates 6 at both ends. The end plates 6 are also provided with threaded holes for threaded connection with the second connecting sleeve 2 / first connecting sleeve 3. The second connecting sleeve 2 and the first connecting sleeve 3 are respectively installed on the end plates 6 at both ends. A connecting rod 1 is fixedly installed on the second connecting sleeve 2, and a wedge-shaped card 4, a spring 5, a baffle 36 and a retaining ring 37 are installed inside the first connecting sleeve 3. Two adjacent precast concrete components can be connected by the engagement of the connecting rod head 11 of the connector for connecting precast piles with end plates with the wedge-shaped card 4.

[0054] When using the connector disclosed in this utility model for connecting precast piles with end plates to connect precast concrete components, the connection of the precast concrete components will not crack or develop fissures under tensile, shear, or bending forces. This means that the connection of the piles using the connector disclosed in this utility model exhibits high tensile, bending, and shear resistance. It also eliminates the problem of gaps generated in existing mechanical joint connections, which can lead to cracks at the joints of precast concrete components and pose safety hazards to the building pile foundation. Furthermore, the line contact allows the mechanical joint to concentrate force on a small area under tension, generating extremely high local pressure. This high pressure causes slight elastic or plastic deformation of the contact area material, microscopically promoting the interlocking of surface rough peaks and forming a "mechanical interlocking" effect. This interlocking significantly increases sliding resistance, preventing slippage of the joint under force and avoiding connection failure caused by the extrusion of the wedge-shaped clip.

[0055] Meanwhile, the connector for connecting precast piles with end plates disclosed in this application, since the connecting rod seat 10 of the connecting rod 1 is threadedly connected to the second connecting sleeve 2, can adjust the length of the connecting rod 1 outside the end of the precast concrete component by adjusting the length of the connection between the connecting rod seat 10 and the second connecting sleeve 2. This allows the connector for connecting precast piles with end plates to be used for connecting different types of precast concrete components (the end plate thickness of different types of precast concrete components will be different). In other words, the connector for connecting precast piles with end plates disclosed in this application can realize the connection of different types of precast concrete components using a connector of one specification for connecting precast piles with end plates.

[0056] When connecting precast concrete components disclosed in this application, anchoring can be achieved using only connectors for connecting precast piles with end plates. Preferably, adjacent precast concrete components are anchored together by the connectors for connecting precast piles with end plates and the end plates are welded together. That is, the ends of the precast concrete components are anchored together using connectors for connecting precast piles with end plates, and the outer edges of the end plates are welded together. By achieving the combined effect of end plate welding and mechanical joint anchoring between adjacent precast concrete components, the pull-out, bending, and shear resistance of the precast concrete components are further improved.

[0057] Example 6 A precast concrete component is connected using the connector for connecting precast piles with end plates disclosed in Embodiments 1 and 2 of this application.

[0058] like Figure 19As shown, the connector disclosed in this application for connecting precast piles with end plates is used to connect precast concrete components. The precast concrete component body has end plates 6 at both ends, and the main reinforcement bars in the precast concrete component body are fixedly connected to the end plates 6 at both ends. The end plates 6 are also provided with threaded holes for threaded connection with the connecting rod seat 10 / first connecting sleeve 3. The connecting rod 1 and the first connecting sleeve 3 are respectively installed on the end plates 6 at both ends. The first connecting sleeve 3 is equipped with a wedge-shaped card 4, a spring 5, a baffle 36 and a retaining ring 37. Two adjacent precast concrete components can be connected by the engagement of the connecting rod head 11 of the connector for connecting precast piles with end plates with the wedge-shaped card 4.

[0059] When using the connector disclosed in this utility model for connecting precast piles with end plates to connect precast concrete components, the connection of the precast concrete components will not crack or develop fissures under tensile, shear, or bending forces. This means that the connection of the piles using the connector disclosed in this utility model exhibits high tensile, bending, and shear resistance. It also eliminates the problem of gaps generated in existing mechanical joint connections, which can lead to cracks at the joints of precast concrete components and pose safety hazards to the building pile foundation. Furthermore, the line contact allows the mechanical joint to concentrate force on a small area under tension, generating extremely high local pressure. This high pressure causes slight elastic or plastic deformation of the contact area material, microscopically promoting the interlocking of surface rough peaks and forming a "mechanical interlocking" effect. This interlocking significantly increases sliding resistance, preventing slippage of the joint under force and avoiding connection failure caused by the extrusion of the wedge-shaped clip.

[0060] Meanwhile, the connector for connecting precast piles with end plates disclosed in this application, since the connecting rod seat 10 of the connecting rod 1 is threadedly connected to the end plate 6, can adjust the length of the connecting rod 1 outside the end of the precast concrete component by adjusting the length of the connection between the connecting rod seat 10 and the end plate 6. This allows the connector for connecting precast piles with end plates to be used for connecting different types of precast concrete components (the end plate thickness of different types of precast concrete components will be different). In other words, the connector for connecting precast piles with end plates disclosed in this application can realize the connection of different types of precast concrete components using a connector of one specification for connecting precast piles with end plates.

[0061] When connecting precast concrete components disclosed in this application, anchoring can be achieved using only connectors for connecting precast piles with end plates. Preferably, adjacent precast concrete components are anchored together by the connectors for connecting precast piles with end plates and the end plates are welded together. That is, the ends of the precast concrete components are anchored together using connectors for connecting precast piles with end plates, and the outer edges of the end plates are welded together. By achieving the combined effect of end plate welding and mechanical joint anchoring between adjacent precast concrete components, the pull-out, bending, and shear resistance of the precast concrete components are further improved.

[0062] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A connector for the connection of a precast pile with a tip plate, for the mechanical connection of a precast concrete element with a tip plate, characterized in that, include: Connecting rod (1), first connecting sleeve (3), wedge-shaped card (4) and spring (5); The connecting rod (1) includes a connecting rod seat (10), a connecting rod head (11), and a connecting rod head connecting section (12) for connecting the connecting rod seat (10) and the connecting rod head (11). The connecting rod head connecting section (12) includes a connecting rod guide (120) fixedly connected to the connecting rod seat (10) and a connecting rod neck (121) fixedly connected to the connecting rod head (11). The outer diameter of the connecting rod neck (121) is smaller than the outer diameter of the connecting rod guide (120). The connecting rod head (11) is provided with a connecting rod head snap-fit flange (110). The wedge-shaped card (4) is provided with an outer card surface (40), an inner card cone surface (41), an outer card cone surface (42), and a wedge-shaped card end face (43). One end of the first connecting sleeve (3) is the insertion end (30) of the connecting rod head, and the first connecting sleeve (3) is provided with a receiving cavity (31); the end of the receiving cavity (31) facing the insertion end (30) of the connecting rod head is provided with a tapered abutment surface (32), and the receiving cavity (31) is provided with two or more wedge-shaped cards (4) and a spring (5) that abuts against the end face (43) of the wedge-shaped card and can apply elastic force to the wedge-shaped card (4); the outer wall of the first connecting sleeve (3) is provided with a first end plate connecting part (33) for fixed connection with the end plate (6); The connecting rod head (11) can be inserted into the space formed by two or more wedge-shaped cards (4) through the insertion end (30) of the connecting rod head. Under the elastic force of the spring (5), the wedge-shaped card (4) enters the space between the tapered contact surface (32) and the neck of the connecting rod (121), so that the outer tapered surface (42) of the wedge-shaped card (4) abuts against the tapered contact surface (32) of the first connecting sleeve (3), and the connecting rod head locking flange (110) of the connecting rod head (11) forms a line contact with the inner tapered surface (41) of the wedge-shaped card (4).

2. A connection for connecting precast piles having a toe plate according to claim 1, characterized in that: The connecting rod head snap-fit flange (110) has one or more.

3. The connector for connecting precast piles with end plates according to claim 2, characterized in that: A connecting rod transition surface (122) is provided between the connecting rod guide portion (120) and the connecting rod neck (121). The relationship between the length of the wedge-shaped card (4) and the length of the connecting rod neck (121) is as follows: When the connecting rod head engaging flange (110) has one, the length of the wedge-shaped card (4) is greater than the distance between the root of the connecting rod transition surface (122) and the connecting rod head engaging flange (110); When there are multiple connecting rod head locking flanges (110), the length of the wedge-shaped card (4) is greater than the distance between the root of the connecting rod transition surface (122) and the outermost connecting rod head locking flange (110).

4. A connector for connecting precast piles having a toe plate as claimed in claim 1, characterized in that: The outer diameter of the connecting rod guide (120) is the same as the outer diameter of the connecting rod head (11); the inner wall of the first connecting sleeve (3) facing the insertion end (30) of the connecting rod head is provided with a sleeve first guide surface (34) that cooperates with the connecting rod guide (120), and the axial length of the connecting rod neck (121) is less than the axial length of the sleeve first guide surface (34).

5. The connector for connecting precast piles with end plates according to any one of claims 1 to 4, characterized in that: It also includes a second connecting sleeve (2), one end of which is a connecting rod connecting end (20) for threaded connection with the connecting rod seat (10), and the other end is a closed end (22); the outer wall of the second connecting sleeve (2) is provided with a second end plate connecting part (21) for fixed connection with the end plate (6). The other end of the first connecting sleeve (3) is the mounting end (35), which is provided with a baffle (36) and a retaining ring (37) or a sealing plug.

6. A connection for connecting precast piles having a toe plate as claimed in claim 5, characterized in that: The outer diameter of the second end plate connecting part (21) is smaller than the outer diameter of the main body of the second connecting sleeve (2); the outer diameter of the first end plate connecting part (33) is smaller than the outer diameter of the main body of the first connecting sleeve (3); both the second end plate connecting part (21) and the first end plate connecting part (33) are provided with external threads.

7. The connector for connecting precast piles with end plates according to claim 1, characterized in that: A connecting rod clamping part (13) is also provided between the connecting rod seat (10) and the connecting rod head connecting section (12); and / or, The included angle of the connecting rod head snap-fit flange (110) is an obtuse angle.

8. A connection for connecting precast piles having a toe plate as claimed in claim 1, characterized in that: The wedge-shaped card (4) has a card guide surface (44) at the end that is inserted toward the head (11) of the connecting rod.

9. A connection for connecting precast piles having a toe plate as claimed in claim 4, characterized in that: The first connecting sleeve (3) has a tapered second guide surface (38) at one end facing the insertion end (30) of the connecting rod head; and / or the inner wall of the first connecting sleeve (3) has a fluid discharge channel.

10. A precast concrete element, characterised in that: Includes the connector for connecting precast piles with end plates as described in any one of claims 1 to 9; Adjacent precast concrete components are anchored together by the connectors used for connecting precast piles with end plates. Alternatively, two adjacent precast concrete components may be anchored together by the connectors used for connecting precast piles with end plates and the end plates may be welded together.