Error adaptation type bolt joint structure, connection method and modular building

Abstract

The invention relates to an error adaptation type bolt joint structure, a connecting method and a modular building, belongs to the technical field of connecting joints, and solves the problem that in the prior art, a high-strength connecting joint structure cannot adapt to manufacturing and mounting errors of a connected structure. The device comprises a connecting screw rod, a locking screw rod and a locking sliding block, the locking sliding block can move in the radial direction of the connecting screw rod, the locking screw rod can move in the axial direction of the connecting screw rod, and when the locking screw rod moves in the axial direction of the connecting screw rod, the locking sliding block can be driven to abut against a connected piece. The slideways which are evenly distributed in the radial direction are arranged in the middle of the connecting screw rod, the locking sliding blocks are arranged in the slideways, the locking screw rod pushes the pressing block moving in the axial direction of the connecting screw rod to move in the threaded connection process of the locking screw rod and the connecting screw rod, and then the locking sliding blocks are driven to move in the radial direction to abut against a connected piece; connection joint error adaptability adjustment and reliable connection can be achieved, joint tension and shear force can be effectively transmitted, and connection reliability and bearing capacity are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of connection nodes, and in particular to an error-adaptive bolt node structure and a connection method. Background Art

[0002] Bolt connections are widely used in steel structure buildings. The most widely used technologies in the current technology are ordinary bolt connections and high-strength bolt connections. Due to the processing and construction deviations in the production and construction of actual steel structure components, whether ordinary bolt connections or high-strength bolt connections are used, the bolt holes used to penetrate the screws must be manually reserved for installation deviations. Therefore, in actual projects, the diameter of the bolt holes is larger than the rod diameter of the screws. The standard hole diameter is generally 1.5mm to 3mm larger than the bolt diameter, and the large round hole diameter is generally 4mm to 8mm larger than the bolt diameter. Since there is a gap between the bolt and the bolt hole wall in the initial stage, during the elastic stress stage of the structure, ordinary bolts can only be used for tension connections, not for shear connections, or there will be undesirable initial displacement of the structure during shear connections. High-strength bolts need to apply friction generated by pre-tightening force to resist shear, but in actual engineering, the friction of high-strength bolts needs to be guaranteed under relatively strict conditions. For example, when the construction error is large, it is possible that the components only have point contact connections. At this time, friction is difficult to ensure safely. In addition, the shear bearing capacity generated by friction of high-strength bolts is much lower than the shear bearing capacity of the bolt rod itself, which will also cause material waste during the elastic stage verification. Summary of the invention

[0003] In view of the above analysis, the embodiments of the present invention aim to provide an error-adaptive bolt node structure and a connection method to solve the problem that the existing high-strength connection node structure cannot adapt to the manufacturing and installation errors of the connected structures.

[0004] On the one hand, the present invention provides an error-adaptive bolt node connection, including a connecting screw, a locking screw and a locking slider, wherein the locking slider can move radially along the connecting screw, and the locking screw can move axially along the connecting screw. When the locking screw moves axially along the connecting screw, it can drive the locking slider to press against the connected part.

[0005] Furthermore, a threaded hole is provided at the end of the connecting screw, and the locking screw is connected to the threaded hole.

[0006] Furthermore, a slideway is provided along the radial direction of the connecting screw, and the slideway is communicated with the threaded hole.

[0007] Furthermore, the locking slider is arranged in the slideway.

[0008] Furthermore, it also includes a first pressing block and a second pressing block, and the first pressing block and the second pressing block are both truncated cone-shaped structures.

[0009] Furthermore, the first pressing block is slidably connected to the upper locking slider, and the second pressing block is slidably connected to the lower locking slider.

[0010] Furthermore, it also includes a rolling body, and the rolling body is provided between the first pressing block and the upper locking screw, and between the second pressing block and the lower locking screw.

[0011] Furthermore, it also includes a locking nut, which is connected to the end of the connecting screw.

[0012] On the other hand, the present invention provides a modular building, comprising a modular building unit and the above-mentioned error-adaptive bolt node structure, wherein two adjacent modular building units are connected via the error-adaptive bolt node structure.

[0013] In another aspect, the present invention provides a connection method of an error-adaptive bolt node structure, which uses the error-adaptive bolt node structure to connect an upper connected member and a lower connected member.

[0014] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0015] (1) The present invention provides a radially uniformly distributed slideway in the middle part of the connecting screw, and a locking slider is provided in the slideway. During the threaded connection between the locking screw and the connecting screw, the lower pressure block moving along the axial direction of the connecting screw is pushed to move, thereby driving the locking slider to move radially to press against the connected parts. This can achieve adaptive adjustment of connection node errors and reliable connection, and can effectively transmit node tension and shear force, thereby improving connection reliability and bearing capacity. The connection method is easy to operate and disassemble, which greatly improves the connection speed and efficiency at the construction site and expands the application range of bolt connection nodes.

[0016] (2) The present invention provides a conical inclined surface protruding from the cylindrical surface of the middle part of the connecting screw in the circumferential direction. The conical inclined surface cooperates with the conical connecting hole of the connecting pad provided between the upper connected part and the lower connected part, which can effectively transmit the node tension and shear force, thereby further improving the connection reliability and bearing capacity.

[0017] (3) The present invention connects adjacent modular building units through an error-adaptive bolt node structure, which can quickly realize the connection between the upper and lower modular building units. At the same time, there is no need to worry about ordinary bolts being unable to withstand shear force or causing undesirable displacement when sheared, and there is no waste caused by using high-strength bolts. The connection is reliable and has strong bearing capacity, and it can be quickly disassembled, thereby improving on-site construction efficiency.

[0018] In the present invention, the above-mentioned technical solutions can also be combined with each other to achieve more preferred combination solutions. Other features and advantages of the present invention will be described in the subsequent description, and some advantages can become obvious from the description, or can be understood by practicing the present invention. The purpose and other advantages of the present invention can be achieved and obtained through the contents particularly pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings are only for the purpose of illustrating particular embodiments and are not to be considered limiting of the present invention. Like reference symbols denote like components throughout the drawings.

[0020] Figure 1 It is a schematic diagram of the connection structure of the error-adaptive bolt node structure in the error-free locking state of the specific embodiment 1;

[0021] Figure 2 For specific embodiment 1 Figure 1 A schematic diagram of the structure enlargement of part A;

[0022] Figure 3 It is a schematic diagram of the connection structure of the error-adaptive bolt node structure in the eccentric locking state of the specific embodiment 1;

[0023] Figure 4 It is a schematic diagram of a connection structure of an error-adaptive bolt node structure in a non-error unlocked state according to a specific embodiment 2;

[0024] Figure 5 For specific embodiment 2 Figure 4 A schematic diagram of the structure of part B in the middle is enlarged;

[0025] Figure 6 It is a schematic diagram of the connection structure of the error-adaptive bolt node structure in the error-free locking state of the specific embodiment 2;

[0026] Figure 7 It is a schematic diagram of the connection structure of the error-adaptive bolt node structure in the eccentric locking state of the specific embodiment 2;

[0027] Figure 8 This is a schematic structural diagram of the error-adaptive bolt node structure of specific embodiment 4 connecting adjacent modular building units.

[0028] Reference numerals:

[0029] 1-connecting screw; 11-threaded hole; 12-slideway; 13-conical slope; 2-locking screw; 3-locking slider; 4-first pressing block; 5-second pressing block; 6-rolling body; 7-locking nut; 8-connecting pad; 100-upper connected part; 200-lower connected part. DETAILED DESCRIPTION

[0030] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0031] Example 1

[0032] A specific embodiment of the present invention, as Figure 1-Figure 3 As shown, an error-adaptive bolt node structure is disclosed, including a connecting screw 1, a locking screw 2 and a locking slider 3. The locking slider 3 moves along the radial direction of the connecting screw 1, and the locking screw 2 moves along the axial direction of the connecting screw 1. When the locking screw 2 moves along the axial direction of the connecting screw 1, it can drive the locking slider 3 to press against the connected parts, and the connected parts include an upper connected part 100 and a lower connected part 200.

[0033] It should be noted that the connected parts can be two upper and lower steel structure members, or they can be the corner box of a modular building, or they can be other components located at the four corners of the bottom of the modular building for connecting the upper and lower modular buildings. That is, the error-adaptive bolt node structure of this embodiment is universally adaptable and is not limited to the application in the field of modular buildings.

[0034] Preferably, the connecting screw 1 is a cylindrical screw.

[0035] In order to realize the axial movement of the locking screw 2 along the connecting screw 1, as Figure 1 and Figure 2 As shown, a threaded hole 11 is provided at the end of the connecting screw rod 1 , and the threaded hole 11 is arranged along the axial direction of the connecting screw rod 1 and is arranged concentrically with the connecting screw rod 1 .

[0036] Since the connecting screw 1 is used to connect the upper connected member 100 and the lower connected member 200, threaded holes 11 are provided at both ends of the connecting screw 1. Accordingly, two locking screws 2 are provided, and the two locking screws 2 are respectively connected to the threaded holes 11 at both ends of the connecting screw 1.

[0037] In order to realize the radial movement of the locking slider 3 along the connecting screw 1, as shown in FIG. Figure 1 and Figure 2 As shown, a slideway 12 is provided along the radial direction of the connecting screw 1, and the slideway 12 is provided near the middle position of the connecting screw 1. Two or more slideways 12 are provided. When there are two slideways 12, the two slideways 12 are symmetrically provided. When there are multiple slideways 12, the multiple slideways 12 are evenly provided along the circumference of the connecting screw 1. A locking slider 3 is correspondingly provided in each slideway 12.

[0038] like Figure 1 , Figure 2 and Figure 3As shown, the error-adaptive bolt node structure also includes a first lower pressing block 4 and a second lower pressing block 5. The first lower pressing block 4 and the second lower pressing block 5 are both truncated cone structures. The diameter of the upper top surface of the first lower pressing block 4 is smaller than the diameter of the lower bottom surface, and the diameter of the upper top surface of the second lower pressing block 5 is larger than the diameter of the lower bottom surface. The conical surface of the first lower pressing block 4 cooperates with the arc surface of the upper locking slider 3, and the conical surface of the second lower pressing block 5 cooperates with the arc surface of the lower locking slider 3.

[0039] In order to connect with the lower pressing block (the first lower pressing block 4 and the second lower pressing block 5) and the connected part, the vertical section of the locking slider 3 is a right-angled trapezoid, and the surface of the locking slider 3 close to the axis of the connecting screw 1 is an arc surface. The surface of the locking slider 3 away from the axis of the connecting screw 1 is a partial cylindrical surface. The outer surface of the radial locking slider 3 is consistent with the cylindrical curvature of the connecting screw 1.

[0040] Since the first pressing block 4 cooperates with the upper locking slider 3, and the second pressing block 5 cooperates with the lower locking slider 3, when the first pressing block 4 moves downward, the upper locking slider 3 moves away from the axis of the connecting screw 1, and uses the outer side surface (part of the cylindrical surface) to press against the upper connected member 100. When the second pressing block 5 moves upward, the lower locking slider 3 moves away from the axis of the connecting screw 1, and uses the outer side surface (part of the cylindrical surface) to press against the lower connected member 200 to accommodate manufacturing errors.

[0041] In order to reduce the friction between the locking screw 2 and the lower pressing block, Figure 1 , Figure 2 and Figure 3 As shown, the error-adaptive bolt node structure further includes a rolling body 6, which is disposed between the upper top surface of the first lower pressing block 4 and the upper locking screw 2, and between the lower bottom surface of the second lower pressing block 5 and the lower locking screw 2. Providing the rolling body 6 between the locking screw 2 and the lower pressing block can also reduce the length of the locking screw 2 to reduce the difficulty of processing.

[0042] When the upper locking screw 2 is tightened, the locking screw 2 pushes the upper rolling body 6 downward, thereby driving the first lower pressure block 4 to move downward, thereby driving the upper locking slider 3 to move outward to press against the upper connected part 100; when the lower locking screw 2 is tightened, the locking screw 2 pushes the lower rolling body 6 upward, thereby driving the second lower pressure block 5 to move upward, thereby driving the lower locking slider 3 to move outward to press against the lower connected part 200.

[0043] like Figure 1 , Figure 2 and Figure 3 As shown, the error-adaptive bolt node structure further includes a locking nut 7 , which is connected to the end of the connecting screw rod 1 .

[0044] In this embodiment, a radially evenly distributed slideway 12 is provided in the middle part of the connecting screw 1, and a locking slider 3 is provided in the slideway 12. During the threaded connection between the locking screw 2 and the connecting screw 1, the lower pressure block moving along the axial direction of the connecting screw 1 is pushed to move, thereby driving the locking slider 3 to move radially to press against the connected parts. This can achieve adaptive adjustment of connection node errors and reliable connection, and can effectively transmit node tension and shear force, thereby improving connection reliability and bearing capacity. The connection method is easy to operate and disassemble, which greatly improves the connection speed and efficiency on the construction site and expands the application range of bolt connection nodes.

[0045] Example 2

[0046] Another specific embodiment of the present invention, as Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, an error-adaptive bolt node structure is disclosed, which is different from Example 1 in that the error-adaptive bolt node structure further includes a connecting pad 8, which is arranged between the upper connected member 100 and the lower connected member 200, and a conical inclined surface 13 partially protruding from the cylindrical surface of the connecting screw 1 is arranged in the middle of the connecting screw 1, and the conical inclined surface 13 is evenly arranged along the circumference of the connecting screw 1, and the slideway 12 is symmetrically arranged on both sides of the conical inclined surface 13. The outer side surface of the conical inclined surface 13 forms a spatially discontinuous virtual conical surface.

[0047] It is understandable that both the upper connected member 100 and the lower connected member 200 are provided with connecting holes, and the diameter of the connecting hole is not less than the sum of the diameter of the connecting screw 1 and 2 times the connection error control accuracy. The conical slope 13 cooperates with the connecting hole of the connecting pad 8.

[0048] The connection pad 8 is provided with a conical connection hole, the size of which is closely matched with the size of the conical inclined surface 13 partially protruding from the cylindrical surface provided around the middle of the length of the connection screw 1. The size of the cone angle satisfies the friction self-locking condition of the contact surface.

[0049] In this embodiment, a conical inclined surface 13 protruding from the cylindrical surface of the connecting screw 1 is provided in the circumferential direction of the middle part of the connecting screw 1. The conical inclined surface 13 cooperates with the conical connecting hole of the connecting pad 8 provided between the upper connected part 100 and the lower connected part 200, which can effectively transmit the node tension and shear force, and further improve the connection reliability and bearing capacity.

[0050] Example 3

[0051] Another specific embodiment of the present invention discloses an error adaptive connection method, which uses the error adaptive bolt node structure of embodiment 1 or embodiment 2, and includes the following steps:

[0052] Step 1: Preliminary installation of connecting screw 1.

[0053] The upper connected part 100, the connecting pad 8 and the lower connected part 200 are placed in sequence from top to bottom, and the upper connected part 100 and the connecting pad 8 are installed according to the connection error control accuracy requirement, and the connecting screw 1 passes through the connecting hole of the upper connected part 100 and the connecting pad 8, and the conical inclined surface 13 partially protruding from the cylindrical surface arranged on the middle circumference of the connecting screw 1 is tightly fitted with the conical connecting hole of the connecting pad 8; the lower connected part 200 is installed according to the connection error control accuracy requirement, and the connecting screw 1 passes through the connecting hole of the lower connected part 200.

[0054] It should be noted that, for a node structure without a connection pad 8, the corresponding functions and steps naturally disappear.

[0055] Step 2: The locking slider 3 moves radially for adaptive locking.

[0056] Screw the upper locking screw 2 into the threaded hole 11 of the connecting screw 1, press and push the rolling body 6 to move along the length direction of the connecting screw 1, and then push the first lower pressure block 4 to move along the length direction of the connecting screw 1 or move along the length direction and radial direction of the connecting screw 1 at the same time, drive the locking slider 3 to expand radially outward along the connecting screw 1, and then press against the connecting hole of the upper connected part 100 to complete the error adaptive tightening; screw the lower locking screw 2 into the threaded hole 11 of the connecting screw 1, press and push the rolling body 6 to move along the length direction of the connecting screw 1, and then push the second lower pressure block 5 to move along the length direction of the connecting screw 1 or move along the length direction and radial direction of the connecting screw 1 at the same time, drive the locking slider 3 to expand radially outward along the connecting screw 1, and then press against the connecting hole of the lower connected part 200 to complete the error adaptive tightening.

[0057] Step 3: Screw in the locking nut 7 to complete the node connection.

[0058] Lock nuts 7 are screwed into both ends of the connecting screw rod 1, and are respectively pressed against the upper connected member 100 and the lower connected member 200 to complete the node connection.

[0059] In this embodiment, the locking screw 2 is used to drive the locking slider 3 to expand outward and inward in the slideway 12 of the connecting screw 1 and then press against the connected parts, which can achieve adaptive adjustment of the connection node error and reliable connection, and can effectively transmit the node tension and shear force, improve the connection reliability and bearing capacity, and the connection method is easy to operate and disassemble, which greatly improves the connection speed and efficiency at the construction site and expands the scope of application of the bolted connection node.

[0060] Example 4

[0061] Another specific embodiment of the present invention, as Figure 8As shown, a modular building is disclosed, including multiple error-adaptive bolt node structures of embodiment 1 and modular building units. The modular building units can be box-type steel structure modules, light steel modules, container modules, etc. There are multiple modular building units, and two adjacent modular building units are connected by error-adaptive bolt node structures. At the same time, two adjacent modular building units are connected by error-adaptive bolt node structures, specifically by connecting pads 8.

[0062] In this embodiment, the error-adaptive bolt node structure is used to connect the adjacent modular building units, so that the connection between the upper and lower modular building units can be quickly achieved. At the same time, there is no need to worry about ordinary bolts being unable to withstand shear forces or producing undesirable displacements when sheared, nor will there be waste caused by the use of high-strength bolts. The connection is reliable and has strong bearing capacity, and can be quickly disassembled, thereby improving on-site construction efficiency.

[0063] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. An error-adaptive bolt node structure, characterized in that: The invention comprises a connecting screw (1), a locking screw (2) and a locking slider (3); the locking slider (3) can move in the radial direction of the connecting screw (1); the locking screw (2) can move in the axial direction of the connecting screw (1); when the locking screw (2) moves in the axial direction of the connecting screw (1), it can drive the locking slider (3) to press against the connected part.

2. The error-adaptive bolt node structure according to claim 1, characterized in that: A threaded hole (11) is provided at the end of the connecting screw (1), and the locking screw (2) is connected to the threaded hole (11).

3. The error-adaptive bolt node structure according to claim 2, characterized in that: A slideway (12) is provided along the radial direction of the connecting screw rod (1), and the slideway (12) is communicated with the threaded hole (11).

4. The error-adaptive bolt node structure according to claim 3, characterized in that: The locking slider (3) is arranged in the slideway (12).

5. The error-adaptive bolt node structure according to any one of claims 1 to 4, characterized in that: It also comprises a first pressing block (4) and a second pressing block (5), wherein the first pressing block (4) and the second pressing block (5) are both truncated cone-shaped structures.

6. The error-adaptive bolt node structure according to claim 5, characterized in that: The first pressing block (4) is slidably connected to the upper locking slider (3), and the second pressing block (5) is slidably connected to the lower locking slider (3).

7. The error-adaptive bolt node structure according to claim 5, characterized in that: It also includes a rolling body (6), which is provided between the first pressing block (4) and the upper locking screw (2), and between the second pressing block (5) and the lower locking screw (2).

8. The error-adaptive bolt node structure according to any one of claims 1-4, 6-7, characterized in that: It also comprises a locking nut (8), wherein the locking nut (8) is connected to the end of the connecting screw rod (1).

9. A modular building, characterized in that: It comprises a modular building unit and the error-adaptive bolt node structure according to any one of claims 1 to 8, wherein two adjacent modular building units are connected by the error-adaptive bolt node structure.

10. An error-adaptive connection method, characterized in that: An upper connected member (100) and a lower connected member (200) are connected using the error-adaptive bolt node structure described in any one of claims 1 to 8.

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