Z-direction torsion-resistant super-large-corner universal spherical hinge support of flexible protection system and assembly method of super-large-corner universal spherical hinge support

Abstract

The invention discloses a flexible protection system super-large corner universal spherical hinge support resistant to torsion in the Z direction and an assembling method of the flexible protection system super-large corner universal spherical hinge support. The support comprises a base, a limiting cover body vertically fixed to the base, a rotating bearing piece arranged on the base in the limiting cover body, a spherical rotating body contained in the limiting cover body and an annular limiting piece fixed to the top of the limiting cover body. The lower portion of the spherical rotating body is in rolling contact with the concave spherical surface of the rotating bearing piece, and the upper portion of the spherical rotating body is buckled and pressed by the annular limiting piece and forms rolling contact, so that universal rotation is achieved. Through the synergistic effect of the rotating bearing piece, the annular limiting piece and the limiting cover body, an integrated bearing system with pressing, pulling and shearing combined stress is formed, and the problems that a traditional spherical hinge support is small in rotating angle, weak in pulling resistance and uneven in stress are solved. The large-turning-angle torsion-resistant composite stress joint is simple and reliable in structure, convenient to assemble and maintain, and particularly suitable for engineering joints needing large turning angles, torsion resistance and composite stress, such as geological disaster flexible protection systems.

Description

Technical Field

[0001] This invention belongs to the technical field of geological disaster prevention systems, specifically relating to a flexible protection system with Z-axis torsion resistance, an ultra-large angle universal ball joint support, and its assembly method. Background Technology

[0002] In areas prone to geological hazards such as slopes and tunnel entrances, flexible protection systems are widely used to intercept falling rocks and landslides to protect the safety of people, vehicles, and buildings below. The core force-transmitting component of this system is the support node that connects the supporting structure (such as steel columns) to the flexible protective net (or rockfall barrier). The performance of the node directly determines the load-bearing capacity, deformation adaptability, and long-term reliability of the entire system when subjected to falling rock impacts.

[0003] Currently, traditional joints used in engineering generally suffer from the following technical defects: First, they have limited cornering capacity and cannot effectively release torsion. Under the complex bending-torsional coupling caused by falling rocks, the internal components of the joint are prone to jamming or even "locking up," leading to abnormal stress concentration and premature joint failure. Second, the stress mode of traditional joints is unbalanced, often mainly bearing compressive stress while having weak tensile and shear resistance. When subjected to combined tensile, compressive, and shear loads, the force transmission path is unclear, easily leading to local stress concentration, which seriously affects the durability of the joint and the stability of the overall structure. Third, existing joints generally lack effective impact buffering mechanisms, allowing impact forces to be directly transmitted to the supporting structure, easily causing structural damage.

[0004] To improve node performance, existing technologies have made some attempts. For example, Chinese patent CN109183638B discloses a self-resetting node with a spring. Although it can achieve automatic reset after impact, it fails to fundamentally solve the problems of small rotation angle, poor torsional resistance, and uneven force distribution in three directions. Furthermore, commonly used ball joint supports (such as CN203926367U, CN205502234U, CN205839982U, CN206971865U, etc.) achieve multi-directional rotation through spherical contact pairs, but still have significant limitations: First, the force distribution remains uneven, and the tensile and shear resistance is weak, often requiring additional tensile or shear resistance devices. This not only leads to structural redundancy and increased costs but may also interfere with the normal rotation function of the node. Second, these ball joint supports generally lack adaptability to vertical (Z-direction) torsion, and are prone to torsional locking under dynamic loads, thus causing node instability. Third, the stress state of its internal components is unclear, and it lacks a systematic design theory and method, making it difficult to conduct accurate engineering design and performance prediction.

[0005] Therefore, there is an urgent need in this field to develop a novel universal ball joint support. This support needs to possess the following characteristics: the ability to achieve a large free bending angle (e.g., 30° to 80°); adaptability to torsion about the vertical axis or the ability to lock as needed; balanced performance under combined compressive, tensile, and shear forces; a compact and reliable overall structure; and ease of engineering assembly and design calculations. This is to meet the high-performance requirements of modern flexible protection systems under complex and harsh conditions such as large impacts, large deformations, and large torsion. Summary of the Invention

[0006] This invention aims to overcome the shortcomings of existing technologies and provide a flexible protective system with Z-axis torsion resistance, featuring an ultra-large angle universal ball joint support and its assembly and design method. This support, through its innovative configuration, solves the technical problems of limited rotation angle, weak pull-out resistance, and unbalanced composite force performance in traditional ball joint supports. It also boasts advantages such as simple and reliable structure, convenient manufacturing and assembly, and low cost. Unlike existing patented technologies that often use die-cast parts to integrally encapsulate the sphere, resulting in unclear force transmission paths for tension, compression, and shear, and inconvenience for disassembly and assembly, this invention adopts a modular design. A bowl-shaped ball pad bears the pressure and supports the sphere for arbitrary rotation; a column cylinder bears the shear force and also serves as a corrosion-resistant seal; and an upper tension-resistant fastener bears the pull-out force. Each component has a clear function, is simple to assemble and disassemble, and has a clear force path, facilitating engineering design and maintenance. Furthermore, the parameters of each component can be varied, combined, and optimized as needed.

[0007] To solve the above-mentioned technical problems, the technical solution proposed in this application is as follows: This invention provides a flexible protective system with Z-axis torsion resistance and an ultra-large angle universal ball joint support, comprising: Base; A limiting cover is erected and fixed on the base, and encloses an internal space with an opening at the top; A rotating support member is disposed on the base within the internal space and has an upward-facing concave spherical surface; A spherical rotating body, wherein the spherical rotating body is disposed within the internal space, and its lower part rolls in contact with the concave spherical surface of the rotating support member; and An annular limiting member is fixedly connected to the top of the limiting cover and presses downward against the upper part of the spherical rotating body, forming a rolling contact with the spherical rotating body.

[0008] Furthermore, it also includes a reinforcing support member, which is disposed on the outer side wall of the limiting cover and fixedly connected to the base.

[0009] Furthermore, the limiting cover is a cylindrical tube; the annular limiting member is a tensile buckling ring; the spherical rotating body is a hollow sphere, and its outer wall is provided with stiffening ribs along the axial force transmission path; the diameter of the cylindrical tube is adapted to the diameter of the hollow sphere.

[0010] Furthermore, the annular limiting member is sleeved around the spherical rotating body, and its lower end is welded to the top of the limiting cover. The outer diameter of the connection between the annular limiting member and the limiting cover is the same. The annular limiting member is a variable diameter structure, with its upper inner diameter being smaller than its lower inner diameter to form a clamping part on the spherical rotating body. The clamping part allows the top of the spherical rotating body to protrude from it.

[0011] Furthermore, the concave spherical surface of the rotating support and the snapping surface of the annular limiting member are both concentric spherical surfaces adapted to the shape of the spherical rotating body; a low-friction material is provided between the spherical rotating body and the rotating support; the inner diameter of the spherical surface of the rotating support and the annular limiting member is not less than the outer diameter of the spherical rotating body, and the difference between the two does not exceed 1mm.

[0012] Furthermore, the limiting cover is a split structure composed of multi-lobed components, which are fixed to each other by connectors provided at the reinforcing support. And / or, An angle locking mechanism is provided between the annular limiting member and the spherical rotating body to limit their relative rotation.

[0013] Furthermore, the maximum rotation angle θ of the support in the vertical plane satisfies:

[0014] in, The height is the distance from the intersection of the axis of the connected external component and the outer surface of the spherical rotating body to the top contact point of the annular limiting member. The height of the annular limiting member. Let be the outer diameter of the spherical rotating body.

[0015] On the other hand, this application also claims protection for a method of assembling a support as described in any of the foregoing claims, comprising the following steps: S1. Design and fabricate a spherical rotating body; S2. Place the rotating support on the base, and then place the spherical rotating body on the rotating support; S3. Fit the limiting cover onto the outside of the spherical rotating body and the rotating support, and fix it onto the base; S4. The annular limiting member is fitted around the spherical rotating body and fixedly connected to the top of the limiting cover, so that the annular limiting member is pressed onto the spherical rotating body.

[0016] 8. The assembly method according to claim 7, characterized in that step S1 includes: according to the formula:

[0017] Determine the outer diameter of the spherical rotating body According to the formula:

[0018] Determine the inner diameter of the spherical rotating body ;in, This is the design value for the maximum axial force. The stress concentration factor is... For safety factor; This refers to the allowable compressive stress of low-friction materials. This is the stiffness correction factor for a spherical rotating body; The height from the center of the spherical rotating body to the top of the rotating support component; This refers to the yield strength of the steel.

[0019] Furthermore, step S2 also includes filling the space between the spherical rotating body and the rotating support with a low-friction material; the thickness of the rotating support... satisfy:

[0020] in, To design compressive bearing capacity, The compressive strength of the material of the rotating support component; Effective bearing projection area; This is the contact area reduction factor; This is for the safety factor.

[0021] Furthermore, the connection between the limiting cover, the base, and the annular limiting member satisfies shear resistance design: for butt welds,

[0022] For fillet welds

[0023] in, For the shear stress of the butt weld; This is the design value for shear force; The contact width between the limiting cover and the base or the annular limiting member; For solder lead dimensions; weld center radius, This is the design value for the shear strength of the weld. For the area of ​​the butt weld, This represents the effective area of ​​the fillet weld.

[0024] Furthermore, the annular limiting member meets the tensile strength design requirements:

[0025] in, The design value of the tensile force of the annular limiting member; The average flow stress of the material; The outer diameter of the annular limiting member; The inner diameter of the annular limiting member.

[0026] Furthermore, the weld leg dimension 'a' between the annular limiting member and the top of the limiting cover satisfies:

[0027] in, This is the design value for maximum tensile force. The diameter of the weld centerline between the annular limiting member and the limiting cover is taken as the outer diameter of the limiting cover; This is the design value for the shear strength of the weld.

[0028] Compared with the prior art, the present invention achieves the following beneficial technical effects: This invention achieves balanced and coordinated transmission of compressive, tensile, and shear forces in a ball joint support, along with ultra-large omnidirectional rotation. It utilizes a rotating support for compression, a limiting cover for shear resistance, and a ring-shaped limiting component for tension resistance to construct an integrated load-bearing path, completely solving the technical defects of traditional joints, such as small rotation angles, weak pull-out resistance, susceptibility to torsional locking, and uneven stress distribution. The overall structure is simple and compact, with clearly defined stress distribution, and possesses excellent deformation adaptability, impact resistance reliability, and ease of assembly and maintenance. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram illustrating the installation method of the ultra-large angle universal ball joint support of the Z-direction anti-torsion flexible protection system in the flexible protection system of this application. Figure 2 This is a schematic diagram of the installation method of the ultra-large angle universal ball joint support of the Z-direction anti-torsion flexible protection system of this application at the column position; Figure 3This is a three-dimensional schematic diagram of the overall structure of the ultra-large angle universal ball joint support of the Z-direction torsional flexible protection system of this application. Figure 4 This is an exploded view of the overall structure of the ultra-large angle universal ball joint support of the Z-direction torsional flexible protection system of this application; Figure 5 This is a schematic diagram of the structural center section of the ultra-large angle universal ball joint support of the Z-direction torsional flexible protection system of this application. Figure 6 This is a schematic diagram of the structural dimensions of the ultra-large angle universal ball joint support for the Z-direction torsional flexible protection system of this application. Figure 7 This is a schematic diagram showing the connection between the ultra-large angle universal ball joint support and the steel column base of the flexible protective system for Z-direction torsion resistance in this application. Figure 8 This is a physical image of the ultra-large angle universal ball joint support for the Z-direction torsional flexible protection system of this application.

[0031] In the figure: base 1, limiting cover 2, reinforcing support 3, rotating support 4, ring limiting 5, spherical rotating body 6, stiffening rib 7, external component 8, cross plate 9, and the axes 10 and 10' of external component 8. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] like Figures 3-8 As shown, the Z-axis torsional resistant flexible protection system of this application includes an ultra-large angle universal ball joint support, comprising: Base 1; The limiting cover 2 is vertically fixed on the base 1 and encloses an internal space with an opening at the top; preferably, the limiting cover 2 is a hollow cylindrical structure with openings at both ends.

[0034] Rotary support 4, which is disposed on the base 1 within the internal space and has an upward concave spherical surface; A spherical rotating body 6 is disposed within the internal space, and its lower part rolls in contact with the concave spherical surface of the rotating support member 4; and An annular limiting member 5 is fixedly connected to the top of the limiting cover 2 and presses downward against the upper part of the spherical rotating body 6, forming a rolling contact with the spherical rotating body 6. In this application, the spherical rotating body 6 is in rolling contact with both the rotating support member 4 and the annular limiting member 5, thereby achieving omnidirectional rotation through the rolling of the spherical rotating body 6 within the limiting cover 2, thus meeting the ultra-large rotation angle requirements of civil engineering components under complex working conditions.

[0035] Those skilled in the art will understand that the top of the spherical rotating body 6 is connected to external components 8 such as steel columns of the flexible protection system, and these external components 8 are then supported by the ball joint support of this application. The optional arrangement positions of the ball joint support in this application are as follows: Figure 1 The circle or Figure 2 At the base of the column.

[0036] In embodiments of this application, a reinforcing support 3 is preferably further included. The reinforcing support 3 is disposed on the outer side wall of the limiting cover 2 and fixedly connected to the base 1. The reinforcing support 3 is fixed to the outer side wall of the limiting cover 2 and fixedly connected to the base 1 by welding or other means, further ensuring the stability of the limiting cover 2.

[0037] Preferably, the limiting cover 2 is a cylindrical tube; the annular limiting member 5 is a tensile buckling ring; the spherical rotating body 6 is a hollow sphere, and its outer wall is provided with stiffening ribs 7 along the axial force transmission path; the diameter of the cylindrical tube is adapted to the diameter of the hollow sphere.

[0038] Furthermore, the annular limiting member 5 is sleeved around the spherical rotating body 6, and its lower end is welded to the top of the limiting cover 2. The outer diameter of the connection between the annular limiting member 5 and the limiting cover 2 is the same. The annular limiting member 5 is a variable diameter structure, with its upper inner diameter being smaller than its lower inner diameter to form a clamping part on the spherical rotating body 6, and the clamping part allows the top of the spherical rotating body 6 to protrude from it. After connecting the external component 8, the annular limiting member 5 serves to constrain the upward displacement of the spherical rotating body 6, while the limiting cover 2 serves to bear pressure and, together with the base 1, ensures the overall structural stability of the support. Finally, combined with the omnidirectional rotation of the spherical rotating body 6, it achieves composite bearing of pressure, tension, shear force, and rotation angle, improving the overall stress performance of the ball joint support.

[0039] Preferably, the concave spherical surface of the rotating support 4 and the snapping surface of the annular limiting member 5 are both concentric spherical surfaces adapted to the shape of the spherical rotating body 6; a low-friction material is provided between the spherical rotating body 6 and the rotating support 4; the inner diameter of the spherical surfaces of the rotating support 4 and the annular limiting member 5 is not less than the outer diameter of the spherical rotating body 6, and the difference between the two does not exceed 1mm. Under the combined action of the rotating support 4 and the annular limiting member 5, horizontal and rotational loads are transmitted through the spherical-spherical sliding pair; the annular limiting member 5 replaces the existing pull-out resistance device to provide pull-out resistance and tension, which solves the problems of structural redundancy and high cost of existing spherical hinge supports while meeting the requirements of complex loads; the spherical rotating body 6 and the rotating support 4 form a rotating pair to achieve universal rotation, which has a greater rotational performance than existing spherical hinge supports; a low-friction material can be filled between the spherical rotating body 6 and the rotating support 4 to reduce rotational friction.

[0040] In this embodiment, the limiting cover 2 can be an integral structure or a split structure composed of multi-lobed components. When installed separately, bolts can be set at the reinforcing support 3 to achieve self-tightening of the multi-lobed components. A rubber pad can be added between the rotating support 4 and the base 1 to achieve buffering and shock absorption. A clamping plate can be welded to the inner side of the annular limiting component 5 and the outer side of the spherical rotating body 6 to lock the torsion angle.

[0041] like Figure 5 As shown, the spherical rotating body 6 is a hollow sphere to reduce the overall weight of the spherical hinge support and achieve lightweighting. Meanwhile, stiffening ribs 7 are provided on the outer wall of the spherical rotating body 6 to ensure structural strength. The stiffening ribs 7 are preferably arranged along the axial force transmission path of the external component 8 connected to the spherical rotating body 6 and can be fixed by welding.

[0042] To reduce manufacturing difficulty and processing costs, the annular limiting member 5 of this application adopts an independent annular structure relative to the limiting cover 2. It can be directly cut from a hollow plate sphere and then fixed to the limiting cover 2 by welding. The annular limiting member 5 is sleeved on the periphery of the spherical rotating body 6, and the lower end of the annular limiting member 5 is welded to the top of the limiting cover 2, so that the annular limiting member 5 is pressed onto the spherical rotating body 6.

[0043] The maximum rotation angle of the ball joint support depends on the external member 8 connected to the spherical rotating body 6. The ball joint support can rotate 360° in the horizontal plane, and its rotation in the vertical plane can be characterized by the change in the axis of the external member 8. For example, it can rotate between axes 10 and 10' of the external member 8. Therefore, the maximum rotation angle of the ball joint support in the vertical plane is... In the formula The height of the point where the axis 10 of the external component 8 intersects with the outer surface of the spherical rotating body 6 to the top contact point of the annular limiting component 5, in mm; The height of the annular limiting component 5 is in mm; The outer diameter of the spherical rotating body 6 is in mm.

[0044] When assembling the ultra-large angle universal ball joint support of the Z-axis torsional flexible protection system mentioned above, the specific assembly steps include: S1. Design the outer and inner diameters of the spherical rotating body 6 and manufacture a hollow sphere according to the design dimensions. Weld stiffening ribs 7 onto the outer wall of the hollow sphere and polish the stiffening ribs 7 smooth to obtain the spherical rotating body 6.

[0045] Specifically, the spherical contact between the spherical rotating body 6 and the rotating support 4 is the core part of the ball joint support that bears and transmits pressure. Using the outer and inner diameters of the spherical rotating body 6 as the control dimensions of the support, the outer and inner diameters of the spherical rotating body 6 are determined through local stability calculations and strength calculations of the hollow sphere under pressure. The outer diameter of the spherical rotating body 6... From the formula Determine the inner diameter of the spherical rotating body 6. From the formula Determined; in the formula The maximum axial force design value of the external component 8 connected to the spherical rotating body 6, in N; Stress concentration factor to account for the effect of rotation angle; For safety factor; The allowable compressive stress for low-friction materials, in N / mm. 2 ; This is the stiffness correction factor for a hollow sphere; The height from the center of the spherical rotating body 6 to the top of the rotating support 4 is in mm; Yield strength of steel, unit N / mm 2 .

[0046] S2. Place the rotating support 4 on the base 1, then place the spherical rotating body 6 on the rotating support 4, and fill the space between the spherical rotating body 6 and the rotating support 4 with low friction material. S3. Fit the limiting cover 2 over the spherical rotating body 6 and the rotating support 4, then weld the reinforcing support 3 to the outer wall of the limiting cover 2, and weld the reinforcing support 3 to the base 1. The number of reinforcing support 3 can be set according to the actual needs of the project, and they are evenly fixed around the limiting cover 2.

[0047] S4. Design the welding leg size for welding the annular limiting part 5 and the limiting cover 2. Fit the annular limiting part 5 around the spherical rotating body 6 and weld the annular limiting part 5 to the top of the limiting cover 2 according to the welding leg design size, so that the annular limiting part 5 is pressed onto the spherical rotating body 6.

[0048] Specifically, since the core function of the annular limiting component 5 is to prevent the spherical rotating body 6 from detaching under tensile force, and since the annular limiting component 5 is welded to the limiting cover 2, the weld between the annular limiting component 5 and the limiting cover 2 is a weak link and a critical part in the force transmission path. Therefore, the weld leg size of the weld between the annular limiting component 5 and the limiting cover 2 needs to be designed separately. The weld leg size of the annular limiting component 5 and the limiting cover 2... From the formula Determined, in the formula The maximum tensile force design value of the external component 8 connected to the spherical rotating body 6, in N; The diameter of the weld centerline between the annular limiting member 5 and the limiting cover 2 is taken as the outer diameter of the limiting cover 2, in mm. The design value of the shear strength of the weld between the annular limiting member 5 and the limiting cover 2, in N / mm. 2 .

[0049] The thickness of the rotating support 4 in this application Design controlled by compressive bearing capacity:

[0050] in The compressive strength of the gasket material, in N / mm². 2 ; Effective bearing projection area (mm) 2 ; This is the contact area reduction factor; This is for the safety factor.

[0051] The shear strength design of the support in this application is determined by the smaller value of the shear strength between the weld between the limiting cover 2 and the base 1 and the weld between the limiting cover 2 and the annular limiting member 5: for butt welds For fillet welds ;in Shear stress in butt welds, unit: N / mm 2 ; This is the design shear force, in N. The contact width between the limiting cover 2 and the top surface of the base 1 or the annular limiting member 5, in mm; Solder leg dimensions, in mm; Weld center position, in mm.

[0052] The tensile design of the support in this application is controlled by the spherical rotating body 6 not being pulled out of the annular limiting member 5, which can be approximated by the expansion internal energy of the annular limiting member 5. The spherical rotating body 6 does work upwards. Approximate equivalent: ;in Design tensile force of the upper component (unit: N); The height difference between the spherical rotating component and the spherical cylinder assembly; The average flow stress of a material is the average flow stress during plastic deformation, typically falling between the yield strength and tensile strength (unit: N / mm²). 2 ); The outer diameter of the tension clamping component; This refers to the inner diameter of the tension clamping component.

[0053] The following is a practical application of the Z-direction anti-torsion flexible protection system with ultra-large angle universal ball joint support of the present invention. The external component 8 connected to the spherical rotating body 6 is a steel column. The steel column is connected to the spherical rotating body through a cross plate 9. Five reinforcing support members 3 are provided around the limiting cover 2. At the same time, ear plates are fixed on the base 1 to connect other components of the steel column foot.

[0054] Assume the axial force of the steel column is 500 kN; stress concentration factor due to rotation angle. Take 1.5; Stiffness correction for hollow spheres Take 1.2; safety factor Take 1.5; by adding lubricating oil to the spherical rotating body 6 and the rotating support 4 to reduce friction, the allowable compressive stress is... Take 355 N / mm 2 Yield strength of steel Take 355 N / mm 2 Height from the center of the spherical rotating body 6 to the top of the rotating support 4 Take 50mm; the contact height between the steel column and the annular limiting member 5. Take 40mm; Height of the annular limiting component 5 Take 50mm; then the outer diameter of the spherical rotating body 6 is... for: .

[0055] Based on geometric feasibility, Therefore, take The inner diameter of the spherical rotating body 6 for: .

[0056] Considering the manufacturing and stability of the hollow sphere, its thickness is rounded up to 10mm, therefore Take 90mm. Then, the maximum rotation angle in the vertical plane of the Z-direction torsional flexible protection system with ultra-large rotation angle universal ball joint support is... for: .

[0057] Based on the determined dimensions of the spherical rotating body 6, the dimensions of the limiting cover 2, the rotating support 4, and the annular limiting part 5 can be determined according to geometric adaptability.

[0058] In practical applications of the Z-axis anti-torsion flexible protection system, the ultra-large angle universal ball joint support of the present invention, through the setting of the limiting cover 2, rotating support 4, annular limiting part 5 and spherical rotating body 6, realizes the integrated bearing of ball-pad pressure → load transfer of limiting cover 2 → fastener anchoring path, and the coordinated transmission of three forces, thereby realizing the integrated force transmission system of compression-tension-shear, so that the steel column connected on the ball joint support is in a pure axial compression state, so as to realize the complete release of the bending moment of the steel column.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A flexible protective system with Z-axis torsion resistance and ultra-large angle universal ball joint support, characterized in that, include: Base (1); The limiting cover (2) is erected and fixed on the base (1) and encloses an internal space with an opening at the top. Rotary support (4), the rotating support (4) is disposed on the base (1) in the internal space and has an upward concave spherical surface; A spherical rotating body (6) is disposed in the internal space, and its lower part rolls in contact with the concave spherical surface of the rotating support (4); as well as The annular limiting member (5) is fixedly connected to the top of the limiting cover (2) and presses down on the upper part of the spherical rotating body (6), forming a rolling contact with the spherical rotating body (6).

2. The support according to claim 1, characterized in that, It also includes a reinforcing support (3), which is disposed on the outer side wall of the limiting cover (2) and fixedly connected to the base (1).

3. The support according to claim 1, characterized in that, The limiting cover (2) is a cylindrical tube; the annular limiting member (5) is a tensile buckling ring; the spherical rotating body (6) is a hollow sphere, and its outer wall is provided with stiffening ribs (7) along the axial force transmission path; the diameter of the cylindrical tube is adapted to the diameter of the hollow sphere.

4. The support according to claim 3, characterized in that, The annular limiting member (5) is sleeved around the spherical rotating body (6), and its lower end is welded to the top of the limiting cover (2). The outer diameter of the annular limiting member (5) and the limiting cover (2) are the same. The annular limiting member (5) is a variable diameter structure, with its upper inner diameter being smaller than its lower inner diameter to form a clamping part on the spherical rotating body (6). The clamping part allows the top of the spherical rotating body (6) to protrude from it.

5. The support according to claim 4, characterized in that, The concave spherical surface of the rotating support (4) and the pressing surface of the annular limiting member (5) are both concentric spherical surfaces adapted to the shape of the spherical rotating body (6); a low-friction material is provided between the spherical rotating body (6) and the rotating support (4); the inner diameter of the spherical surfaces of the rotating support (4) and the annular limiting member (5) is not less than the outer diameter of the spherical rotating body (6), and the difference between the two does not exceed 1 mm.

6. The support according to claim 2, characterized in that, The limiting cover (2) is a split structure made up of multiple petal components, which are fixed to each other by connectors provided at the reinforcing support (3); And / or, An angle locking mechanism is provided between the annular limiting member (5) and the spherical rotating body (6) to limit their relative rotation.

7. The support according to claim 1, characterized in that, The maximum rotation angle θ of the support in the vertical plane satisfies: in, The height of the point where the axis (10) of the connected external component (8) intersects with the outer surface of the spherical rotating body (6) and the top contact point of the annular limiting member (5) is given. The height of the annular limiting member (5) is... The outer diameter is the spherical rotating body (6).

8. A method for assembling a support as described in any one of claims 1-7, characterized in that, Includes the following steps: S1. Design and manufacture a spherical rotating body (6); S2. Place the rotating support (4) on the base (1), and then place the spherical rotating body (6) on the rotating support (4); S3. The limiting cover (2) is fitted over the outside of the spherical rotating body (6) and the rotating support (4), and fixed to the base (1); S4. The annular limiting member (5) is fitted around the spherical rotating body (6) and fixedly connected to the top of the limiting cover (2) so that the annular limiting member (5) is pressed onto the spherical rotating body (6).

9. The assembly method according to claim 8, characterized in that, Step S1 includes: According to the formula: Determine the outer diameter of the spherical rotating body (6) According to the formula: Determine the inner diameter of the spherical rotating body (6) ;in, This is the design value for the maximum axial force. The stress concentration factor is... For safety factor; This refers to the allowable compressive stress of low-friction materials. For the stiffness correction factor of the spherical rotating body (6); The height from the center of the spherical rotating body (6) to the top of the rotating support (4); This refers to the yield strength of the steel.

10. The assembly method according to claim 8, characterized in that, Step S2 further includes filling a low-friction material between the spherical rotating body (6) and the rotating support (4); the thickness of the rotating support (4) satisfy: in, To design compressive bearing capacity, The compressive strength of the material of the rotating support (4); Effective bearing projection area; This is the contact area reduction factor; This is for the safety factor.

11. The assembly method according to claim 8, characterized in that, The connection between the limiting cover (2), the base (1), and the annular limiting member (5) satisfies the shear resistance design: for butt welds, For fillet welds in, For the shear stress of the butt weld; This is the design value for shear force; The contact width between the limiting cover (2) and the base (1) or the annular limiting member (5); For solder lead dimensions; The radius of the location of the centerline of the butt weld. This is the design value for the shear strength of the weld. For the area of ​​the butt weld, This represents the effective area of ​​the fillet weld.

12. The assembly method according to claim 8, characterized in that, The annular limiting member (5) meets the tensile design requirements: in, The design value of the tensile force of the annular limiting member (5); The average flow stress of the material; The outer diameter of the annular limiting member (5); The inner diameter of the annular limiting member (5) is given.

13. The assembly method according to claim 12, characterized in that, The weld leg dimension a of the annular limiting member (5) welded to the top of the limiting cover (2) satisfies: in, This is the design value for maximum tensile force. The diameter of the weld centerline between the annular limiting member (5) and the limiting cover (2) is taken as the outer diameter of the limiting cover (2); This is the design value for the shear strength of the weld.

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