Shearing-resistant bolt-sphere joint for connecting and reinforcing

Abstract

The utility model relates to a shear-resistant bolt-sphere joint for connection and reinforcement. The shear-resistant bolt-sphere joint comprises a steel pipe, a bolt sphere and a fixing piece. A cavity is formed in the steel pipe, a protruding conical head is arranged at one end of the steel pipe, a through groove is formed in the center of the conical head, and the end, with the small end face area, of the conical head is far away from the steel pipe. A fixing groove is formed in the side, facing the conical head, of the bolt sphere. The fixing piece comprises a bolt and a reinforcing piece. One end of the bolt penetrates through the through groove and is in threaded connection with the interior of the fixing groove, and a nut of the bolt abuts against the interior of the through groove. One end of the reinforcing piece is welded to the nut, and the other end of the reinforcing piece is connected with the inner side wall of the cavity. A reinforcing piece is welded to a nut of the bolt and tightly attached to the inner side wall of the steel pipe, and the conical head and the steel pipe are connected into a whole. When the steel pipe is subjected to shearing force, the reinforcing piece can share part of acting force for the bolt, the shearing resisting effect is achieved, and therefore the bending strength of the bolt-sphere joint is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of space grid structures, in particular to a connection and reinforcement shear-resistant bolt ball node. Background Art

[0002] Grid structures offer advantages such as easy construction, beautiful appearance, flexible structural form, and clear force distribution. This flat or slightly curved spatial truss system, composed of multiple members connected by nodes in a grid pattern, has been widely used in large-span buildings. To reduce the weight of the roof structure and consider economic efficiency, the grid is often larger, and the division of the grid's upper chord determines the spacing of the main purlins. Excessive purlin spacing, i.e., excessive roof panel span, leads to an unreasonable roof panel design. Therefore, grid roofs typically utilize a combination of primary and secondary purlins. Connecting these primary and secondary purlins is a critical and time-consuming task, directly impacting not only the structural load, project quality, and construction safety, but also the construction schedule.

[0003] Research is underway to develop a bolt-and-ball joint connection structure with a certain degree of shear resistance. This is aimed at developing a novel purlin-free bolt-and-ball truss technology solution, enabling the truss upper chord to withstand a certain amount of vertical load. Through rational design, the truss upper chord can also serve as the main roof purlin, simplifying the roof system. Conventional bolt-and-ball joints do not account for the bending moment exerted on the joint by the chord when it bends, only considering the tension and compression of the joint. This results in low bending strength.

[0004] Therefore, it is necessary to provide a connection reinforcement shear-resistant bolt ball node to solve the above problems. Utility Model Content

[0005] The utility model relates to a connection and reinforcement shear-resistant bolt ball node, wherein a reinforcement piece is welded to the nut of the bolt, the reinforcement piece is in close contact with the inner wall of the steel pipe, and the cone head and the steel pipe are connected to form a whole. When the steel pipe is subjected to shear force, the reinforcement piece will share part of the force for the bolt, thereby achieving a shear-resistant effect, thereby improving the bending strength of the bolt ball node, and solving the problem of low bending strength caused by the bolt ball node in the prior art that only the tensile force of the chord is considered.

[0006] To solve the above problems, the present invention provides a connection and reinforcement shear-resistant bolt ball joint, comprising:

[0007] A steel pipe having a chamber disposed therein, a protruding cone head disposed at one end of the steel pipe, a through slot disposed at the center of the cone head, and an end of the cone head having a smaller end surface area disposed away from the steel pipe;

[0008] a bolt ball, the bolt ball being arranged at an end of the cone head away from the steel pipe, and a fixing groove being arranged on a side of the bolt ball facing the cone head; and

[0009] A fixing part, the fixing part includes a bolt and a reinforcement part, one end of the bolt passes through the through slot and is threadedly connected to the fixing slot, and the nut of the bolt abuts against the through slot; one end of the reinforcement part is welded to the nut of the bolt, and the other end of the reinforcement part is located in the chamber and connected to the inner wall of the chamber.

[0010] Furthermore, the cone head is configured as a truncated cone-shaped structure, with one end of the cone head connected to the steel pipe being open, and the other end of the cone head being provided with a sealing plate to increase the bearing strength of the cone head and facilitate installation of the reinforcement. The sealing plate is provided with an inner hole, and the cone head is hollow. One end of the bolt is provided through the inner hole.

[0011] Furthermore, the nut of the bolt abuts against the inner side of the sealing plate, and the diameter of the nut of the bolt is smaller than the diameter of the inner side of the sealing plate and larger than the diameter of the inner hole, which can increase the contact area, thereby increasing the force area and the tensile and bending strength.

[0012] Furthermore, the wall thickness of the cone head is gradually increased in the direction approaching the sealing plate, thereby improving the bearing strength.

[0013] Furthermore, the reinforcement member includes a reinforcement rod and a support block. One end of the reinforcement rod is welded to the nut of the bolt, and the other end of the reinforcement rod is fixedly connected to the support block. The peripheral side of the support block is in contact with the inner wall of the chamber, which has a simple structure and saves costs.

[0014] Furthermore, the reinforcing rod is configured as a hollow tube structure, which can reduce deadweight and save costs, and has better bending and torsion resistance.

[0015] Furthermore, the distance from the end face of the support block to the end where the cone head is connected to the steel pipe is greater than the length of the bolt, which can improve the sensitivity and enable the bolt ball node to share the shear more quickly.

[0016] Furthermore, the diameter of the reinforcement rod is greater than or equal to the diameter of the bolt and is arranged coaxially with the central axis, thereby improving shear strength and facilitating protection of the reinforcement rod.

[0017] Furthermore, the connection and reinforcement shear-resistant bolt-ball node also includes a sleeve and a fixing pin. The bolt is provided with a deep groove along its length, and the sleeve is provided with a pin hole. The sleeve is fitted around the outer periphery of the bolt and positioned between the bolt ball and the cone head. One end of the fixing pin passes through the pin hole and is fixed to the deep groove, facilitating inspection of the bolt's proper tightening and preventing relative displacement between the bolt and the bolt ball, which could affect the stability of the entire node.

[0018] Furthermore, the bolt is provided with a shallow groove area along its length direction, the shallow groove area is connected to the deep groove area, the groove depth of the shallow groove area is less than the depth of the deep groove area, and the shallow groove area is arranged close to the bolt ball to improve assembly efficiency.

[0019] Due to the use of the aforementioned bolt-ball joint for connection reinforcement and shear resistance, the present invention has the following advantages over the prior art: The present invention relates to a bolt-ball joint for connection reinforcement and shear resistance, comprising a steel pipe, a bolt ball, and a fixing member. The steel pipe has a chamber disposed within it. A protruding conical head is disposed at one end of the steel pipe, a through-groove is disposed in the center of the conical head, and the end of the conical head with a smaller end surface area is disposed away from the steel pipe. The bolt ball is disposed at the end of the conical head facing away from the steel pipe, and a fixing groove is disposed on the side of the bolt ball facing the conical head. The fixing member comprises a bolt and a reinforcement member. One end of the bolt passes through the through-groove and is threadedly connected to the fixing groove, with the bolt nut abutting the through-groove. One end of the reinforcement member is welded to the bolt nut, while the other end of the reinforcement member is located within the chamber and connected to the inner wall of the chamber. A reinforcement member is welded to the bolt nut, the reinforcement member being in close contact with the inner wall of the steel pipe, and the conical head and the steel pipe are integrally connected. When the steel pipe is subjected to shear force, the reinforcement will share part of the force with the bolt, achieving the shear resistance effect, thereby improving the bending strength of the bolt ball node, solving the problem in the prior art that the bolt ball node only considers the tensile force of the chord rod, resulting in low bending strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. The drawings described below are only drawings corresponding to some embodiments of the present invention.

[0021] Figure 1 This is a schematic diagram of the exploded structure of an embodiment of the connection and reinforcement shear-resistant bolt ball node of the utility model.

[0022] Figure 2 This is a schematic cross-sectional view of an embodiment of a connection and reinforcement shear-resistant bolt ball node according to the present invention.

[0023] Figure 3This is a structural schematic diagram of an embodiment of a connection and reinforcement shear-resistant bolt ball node of the utility model.

[0024] Figure 4 This is a front view of an embodiment of a fixing member for connecting and reinforcing a shear-resistant bolt ball node according to the present invention.

[0025] Figure 5 The figure is a structural schematic diagram of an embodiment of a reinforcement member for connecting and reinforcing a shear-resistant bolt ball joint according to the present invention.

[0026] In the figure: 1. Connection and reinforcement of shear-resistant bolt ball node; 2. Steel pipe; 21. Chamber; 3. Bolt ball; 31. Fixing groove; 4. Fixing piece; 41. Reinforcement piece; 411. Reinforcement rod; 412. Support block; 42. Bolt; 43. Deep groove area; 44. Shallow groove area; 5. Cone head; 51. Through groove; 52. Closing plate; 521. Inner hole; 6. Sleeve; 61. Pin hole; 7. Fixing pin. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0028] Directional terms mentioned in this invention, such as "upper", "lower", "front", "back", "left", "right", "inside", "outside", "side", "top" and "bottom", are only used with reference to the directions of the drawings. The directional terms used are used to illustrate and understand the invention, and are not intended to limit the invention.

[0029] In the figures, structurally similar elements are denoted by the same reference numerals.

[0030] Please refer to Figure 1 、 Figure 2 、 Figure 3In this embodiment, the connection reinforcement shear resistance bolt ball node 1 includes a steel pipe 2, a bolt ball 3 and a fixing part 4. A chamber 21 is provided inside the steel pipe 2, and a protruding cone head 5 is provided at one end of the steel pipe 2. A through groove 51 is provided in the center of the cone head 5, and the end with a smaller end face area of the cone head 5 is provided away from the steel pipe 2. The bolt ball 3 is provided at the end of the cone head 5 away from the steel pipe 2, and a fixing groove 31 is provided on the side of the bolt ball 3 facing the cone head 5. The fixing part 4 includes a bolt 42 and a reinforcement 41. One end of the bolt 42 passes through the through groove 51 and is threadedly connected to the fixing groove 31, and the nut of the bolt 42 abuts against the through groove 51. One end of the reinforcement 41 is welded to the nut of the bolt 42, and the other end of the reinforcement 41 is located in the chamber 21 and connected to the inner wall of the chamber 21. A reinforcement 41 is welded to the nut of the bolt 42. The reinforcement 41 is in close contact with the inner wall of the steel pipe 2, and the tapered head 5 is integrally connected to the steel pipe 2. The reinforcement 41 connects and reinforces the bolt 42 and the steel pipe 2. The reinforcement 41 and bolt 42 are integrally connected. When the steel pipe 2 is subjected to shear force, the reinforcement 41 is also subjected to the force, achieving a shear resistance effect, thereby improving the bending strength of the bolt-ball joint.

[0031] In this embodiment, please refer to Figure 1 、 Figure 2 The cone head 5 is configured as a truncated cone. The end of the cone head 5 connected to the steel pipe 2 is open. A sealing plate 52 is provided at the other end of the cone head 5 to enhance its bearing strength and facilitate installation of the reinforcement 41. The sealing plate 52 has an inner hole 521, making the cone head 5 hollow. One end of the bolt 42 is inserted through the inner hole 521. The bolt 42 may be threaded only at the end connected to the bolt ball 3.

[0032] Please refer to the preferred Figure 2 The nut of the bolt 42 abuts against the inner side of the sealing plate 52. The diameter of the nut of the bolt 42 is smaller than the diameter of the inner side of the sealing plate 52 and larger than the diameter of the inner hole 521, which can increase the contact area and evenly transmit the force, thereby increasing the force area and the tensile and bending strength.

[0033] The wall thickness of the cone head 5 increases gradually as it approaches the sealing plate 52, enhancing load-bearing strength. Specifically, the wall thickness of the cone head 5 gradually increases from one end of the steel pipe 2 to the end of the sealing plate 52. The wall thickness of the cone head 5 at the end connected to the steel pipe 2 is greater than the wall thickness of the steel pipe 2, making the connection of the cone head 5 more stable. The thickness of the sealing plate 52 is greater than the maximum thickness of the side wall of the cone head 5, providing stronger support for the nut of the bolt 42 and improving the load-bearing strength of the cone head 5.

[0034] In this embodiment, please refer to Figure 4 、 Figure 5The reinforcement member 41 comprises a reinforcing rod 411 and a support block 412. One end of the reinforcing rod 411 is welded to the nut of the bolt 42, while the other end is fixedly connected to the support block 412. The circumference of the support block 412 is in contact with the inner wall of the chamber 21, resulting in a simple structure and cost savings. The reinforcement member 41 must be made of a higher-strength material, otherwise it will be easily damaged when subjected to shear forces.

[0035] The support block 412 can be configured as a disc-shaped structure, with the circumference of the support block 412 in close contact with the inner wall of the steel pipe 2. Otherwise, it will not be able to share the shear force. The thickness of the support block 412 can be adjusted according to actual conditions. The support block 412 can be integrally formed with the reinforcement rod 411 to enhance the strength of the structure.

[0036] Specifically, the reinforcing rod 411 is configured as a hollow tube structure, which can reduce deadweight and save costs, and has better bending and torsion resistance.

[0037] Please refer to Figure 2 The distance from the end face of support block 412 to the end where the cone head 5 connects to the steel pipe 2 is greater than the length of bolt 42. This improves sensitivity and allows the bolt-ball joint to more quickly share shear loads. In other words, the length of reinforcement rod 411 should extend deeper into the steel pipe 2. The specific length can be set based on actual site requirements.

[0038] The diameter of the reinforcing rod 411 is greater than or equal to the diameter of the bolt 42 and is arranged coaxially, which improves the shear strength, helps protect the reinforcing rod 411 and improves the stability of the structure. If the diameter of the reinforcing member 41 is too small, the reinforcing member 41 will be damaged once the shear force is too large.

[0039] In this embodiment, please refer to Figure 1 、 Figure 2 、 Figure 4 The shear-resistant bolt-ball joint 1 also includes a sleeve 6 and a fixing pin 7. The bolt 42 is provided with a deep groove 43 along its length, and the sleeve 6 is provided with a pin hole 61. The sleeve 6 is fitted around the outer periphery of the bolt 42 and positioned between the bolt ball 3 and the cone head 5. One end of the fixing pin 7 passes through the pin hole 61 and is fixed to the deep groove 43, making it easy to check whether the bolt 42 is properly screwed in. It also prevents relative displacement between the bolt 42 and the bolt ball 3, which could affect the stability of the entire joint.

[0040] Moreover, the bolt 42 is provided with a shallow groove area 44 along its length direction. The shallow groove area 44 is connected to the deep groove area 43. The groove depth of the shallow groove area 44 is less than the depth of the deep groove area 43, and the shallow groove area 44 is arranged close to the bolt ball 3. The shallow groove area 44 can support the fixing pin 7 and drive the bolt 42 to be screwed into the bolt ball 3, thereby improving the efficiency of assembly.

[0041] During prefabrication, a flat cutout is made in the bolt ball 3, with a threaded retaining groove 31 drilled inward from the center. This groove is used to receive a high-strength bolt 42. This flat cutout ensures full contact with the cross-section of the sleeve 6, achieving a seal. A pin hole 61 is drilled in the upper wall of the sleeve 6 for the screwing of a retaining pin 7. Once the retaining pin 7 is screwed in, no protrusion should appear on the sleeve 6.

[0042] During assembly, first weld the reinforcement 41 to the nut of the high-strength bolt 42. Then, insert the bolt 42 through the cone head 5 and insert the reinforcement 41 smoothly into the chamber 21 to the desired depth. Then, weld the cone head 5 to the steel pipe 2. Sleeve 6 is placed on the end of the bolt 42 away from the nut, and the bolt 42 is screwed into the bolt ball 3.

[0043] When screwing bolt 42 into bolt ball 3, sleeve 6 may contact the surface of bolt ball 3, but fixing pin 7 may not reach the bottom of fixing groove 31. In this case, fixing pin 7 needs to be removed, sleeve 6 should be slid toward steel pipe 2, fixing pin 7 should be inserted again, and sleeve 6 should be tightened to screw bolt 42 into bolt ball 3. Repeat these steps until fixing pin 7 reaches the bottom of deep groove 43.

[0044] The connection reinforcement shear-resistant bolt ball node 1 shares certain mechanical effects by adding force transmission components, making the bolt ball node more stable and strong, and having certain bending and shear resistance. Moreover, it has a simple structure, is easy to process, and can be assembled easily and quickly. A reinforcement member 41 is welded on the nut of the bolt 42, and the reinforcement member 41 is in close contact with the steel pipe 2. When the cone head 5 is connected to the steel pipe 2 as a whole and is subjected to shear force, the reinforcement member 41 will share some mechanical effects with the bolt 42, achieving a shear-resistant effect. The reinforcement member 41 is divided into two parts: a reinforcement rod 411 and a support block 412. The reinforcement rod 411 has good shear and bending resistance, and the support block 412 is used to be stuck in the steel pipe 2.

[0045] When steel pipe 2 is subjected to shear, there are two force transmission sequences at this node: the first is steel pipe 2, cone head 5, bolt 42, sleeve 6, and bolt ball 3; the second is steel pipe 2, cone head 5, support block 412, reinforcement rod 411, bolt 42, sleeve 6, and bolt ball 3. The reinforcement 41 attached to the nut of bolt 42 can absorb some of the shear force, greatly enhancing the overall shear resistance.

[0046] In this embodiment, the utility model relates to a connection reinforcement shear-resistant bolt ball node, which includes a steel pipe, a bolt ball and a fixing part. A chamber is provided inside the steel pipe, and a protruding cone head is provided at one end of the steel pipe. A through groove is provided in the center of the cone head, and the end with a smaller end face area of the cone head is provided away from the steel pipe. The bolt ball is provided at the end of the cone head away from the steel pipe, and a fixing groove is provided on the side of the bolt ball facing the cone head. The fixing part includes a bolt and a reinforcement part. One end of the bolt passes through the through groove and is threadedly connected to the fixing groove, and the nut of the bolt abuts the through groove. One end of the reinforcement part is welded to the nut of the bolt, and the other end of the reinforcement part is located in the chamber and connected to the inner wall of the chamber. A reinforcement part is welded to the nut of the bolt, and the reinforcement part is tightly attached to the inner wall of the steel pipe, and the cone head and the steel pipe are connected as a whole. When the steel pipe is subjected to shear force, the reinforcement will share part of the force with the bolt, achieving the shear resistance effect, thereby improving the bending strength of the bolt ball node, solving the problem in the prior art that the bolt ball node only considers the tensile force of the chord rod, resulting in low bending strength.

[0047] In summary, although the present invention has been disclosed above with reference to preferred embodiments, the above preferred embodiments are not intended to limit the present invention. A person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope defined by the claims.

Claims

1. A connection reinforcement shear resistance bolt ball node, characterized in that: include: A steel pipe having a chamber disposed therein, a protruding cone head disposed at one end of the steel pipe, a through slot disposed at the center of the cone head, and an end of the cone head having a smaller end surface area disposed away from the steel pipe; a bolt ball, the bolt ball being arranged at an end of the cone head away from the steel pipe, and a fixing groove being arranged on a side of the bolt ball facing the cone head; and A fixing part, the fixing part includes a bolt and a reinforcement part, one end of the bolt passes through the through slot and is threadedly connected to the fixing slot, and the nut of the bolt abuts against the through slot; one end of the reinforcement part is welded to the nut of the bolt, and the other end of the reinforcement part is located in the chamber and connected to the inner wall of the chamber.

2. The connection and reinforcement shear-resistant bolt ball joint according to claim 1, characterized in that: The cone head is configured as a truncated cone structure, one end of the cone head connected to the steel pipe is open, the other end of the cone head is provided with a sealing plate, the sealing plate is provided with an inner hole, and the interior of the cone head is hollow; one end of the bolt is provided through the inner hole.

3. The connection and reinforcement shear-resistant bolt ball joint according to claim 2, characterized in that: The nut of the bolt abuts against the inner side surface of the sealing plate, and the diameter of the nut of the bolt is smaller than the diameter of the inner side surface of the sealing plate and larger than the diameter of the inner hole.

4. The connection reinforcement shear-resistant bolt ball joint according to claim 2, characterized in that: The wall thickness of the cone head is gradually increased in a direction approaching the sealing plate.

5. The connection and reinforcement shear-resistant bolt ball joint according to claim 1, characterized in that: The reinforcement member includes a reinforcement rod and a support block, one end of the reinforcement rod is welded to the nut of the bolt, the other end of the reinforcement rod is fixedly connected to the support block, and the peripheral side of the support block is in contact with the inner wall of the chamber.

6. The connection and reinforcement shear-resistant bolt ball joint according to claim 5, characterized in that: The reinforcement rod is configured as a hollow tube structure.

7. The connection and reinforcement shear-resistant bolt ball joint according to claim 5, characterized in that: The distance from the end surface of the support block to the end where the cone head is connected to the steel pipe is greater than the length of the bolt.

8. The connection and reinforcement shear-resistant bolt ball joint according to claim 5, characterized in that: The diameter of the reinforcing rod is greater than or equal to the diameter of the bolt and is arranged coaxially with the central axis.

9. The connection and reinforcement shear-resistant bolt ball joint according to claim 1, characterized in that: The connection reinforcement shear-resistant bolt ball node also includes a sleeve and a fixing pin; the bolt is provided with a deep groove area along its length direction, and the sleeve is provided with a pin hole; the sleeve is sleeved on the outer circumference of the bolt and is located between the bolt ball and the cone head; when the bolt is fixed in the fixing groove, one end of the fixing pin passes through the pin hole and is fixed in the deep groove area.

10. The connection and reinforcement shear-resistant bolt ball joint according to claim 9, characterized in that: The bolt is also provided with a shallow groove area along its length direction. The shallow groove area is connected to the deep groove area. The groove depth of the shallow groove area is smaller than the depth of the deep groove area, and the shallow groove area is arranged close to the bolt ball.

Images