CN116145812A - Mortise and tenon type hollow ball joint - Google Patents

Mortise and tenon type hollow ball joint Download PDF

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Publication number
CN116145812A
CN116145812A CN202310262914.4A CN202310262914A CN116145812A CN 116145812 A CN116145812 A CN 116145812A CN 202310262914 A CN202310262914 A CN 202310262914A CN 116145812 A CN116145812 A CN 116145812A
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CN
China
Prior art keywords
mortise
tenon
hollow ball
axis
type hollow
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310262914.4A
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Chinese (zh)
Inventor
杜文风
顾金超
周志勇
朱黎明
朱培
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Henan University
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Henan University
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Publication date
Application filed by Henan University filed Critical Henan University
Priority to CN202310262914.4A priority Critical patent/CN116145812A/en
Publication of CN116145812A publication Critical patent/CN116145812A/en
Pending legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
    • E04B1/2403—Connection details of the elongated load-supporting parts
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/38—Connections for building structures in general
    • E04B1/58—Connections for building structures in general of bar-shaped building elements
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
    • E04B1/2403—Connection details of the elongated load-supporting parts
    • E04B2001/2406—Connection nodes
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
    • E04B1/2403—Connection details of the elongated load-supporting parts
    • E04B2001/2421—Socket type connectors

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Joining Of Building Structures In Genera (AREA)

Abstract

The invention provides a mortise and tenon type hollow ball node which comprises a hollow ball, wherein the hollow ball comprises two hollow hemispheres, the two hollow hemispheres are fixedly connected to form a hollow ball, a plurality of first connecting parts are arranged outside the hollow ball, the mortise and tenon type hollow ball node also comprises a plurality of second connecting parts, the first connecting parts are connected with the second connecting parts through mortise and tenon type assemblies, and the mortise and tenon type assemblies are used for limiting the second connecting parts to move along the direction of a first axis or a second axis. The first connecting part and the second connecting part are connected through the mortise and tenon joint assembly, the node is simple and attractive in structural form, convenient to connect and clear in force transmission, and the characteristics of the traditional mortise and tenon joint technology in China are reflected.

Description

Mortise and tenon type hollow ball joint
Technical Field
The invention relates to the technical field of general space structures of buildings, in particular to a mortise and tenon type hollow ball node.
Background
The space grid structure is a space structure form which has been developed most rapidly in more than 30 years since the middle of the 20 th century, and is a grid-shaped structural system formed by connecting a plurality of rods according to a certain regular geometric shape through nodes, and has the advantages of attractive appearance, reasonable stress, economy in materials, large coverage space and the like. In the space grid structure, the nodes are important components, and have direct influence on the development of the structural form, so that the nodes with simple structure, convenient installation and attractive appearance are easier to be applied in practical engineering on one hand, and the mechanical properties of the nodes directly influence the mechanical properties of the whole structure on the other hand.
In the development process of the space grid structure node system, the welded hollow ball node and the bolt ball node represent two types of welded nodes and assembled nodes, and are still widely applied to various space grid building structures until now, wherein the welded hollow ball node is formed by butt welding two half spherical shells formed by stamping, and a rod piece of the welded hollow ball node is connected to the outer surface of the spherical shell by welding. The bolt ball node is composed of parts such as solid steel balls, conical heads, bolts, pins, sleeves and the like with internally provided threaded holes, can be processed and manufactured in factories, and then transported to a construction site for installation.
Disclosure of Invention
Based on the above, it can be seen that the development of the node connection form with high efficiency, light weight and high assembly degree is an important aspect for promoting the development of the space grid structure, while the ancient mortise and tenon connection mode in China is a connection technology with the characteristics, and accords with the development trend of building structure assembly. Therefore, the mortise-tenon type hollow ball node is necessary to solve the problems existing in the prior hollow ball node in use, the mortise-tenon type hollow ball node is high in installation accuracy compared with a welded hollow ball node, the problem of manual errors caused by field high-altitude welding operation can be avoided, and the mortise-tenon type hollow ball node is convenient to connect and clear in force transmission compared with the prior bolt type hollow ball node, and can also avoid the problems of 'superscrewing' or 'false screwing' when the bolt type hollow ball node is installed.
The above purpose is achieved by the following technical scheme:
the mortise and tenon type hollow ball joint comprises a hollow ball, wherein the hollow ball comprises two hollow hemispheres, and the two hollow hemispheres are fixedly connected to form a hollow ball;
the outside of the hollow sphere is provided with a plurality of first connecting parts;
the mortise and tenon type hollow ball node further comprises a plurality of second connecting parts;
the first connecting part and the second connecting part are connected through a mortise and tenon assembly, and the mortise and tenon assembly is used for limiting the second connecting part to move along the direction of the first axis or the second axis;
the mortise and tenon assembly comprises mortise grooves and tenons, the mortise grooves are formed in one end of the first connecting portion, which is far away from the hollow ball, and the tenons are arranged at one end of the second connecting portion;
the connecting part of the mortise and tenon assembly is provided with a connecting assembly, and the connecting assembly is used for limiting the second connecting part to move along the direction of the third axis;
the first axis, the second axis and the third axis are perpendicular to each other.
In one embodiment, the mortise and tenon are shaped to fit.
In one embodiment, the cross section of the connecting part of the mortise and tenon is square or round.
In one embodiment, the mortise slot includes a plurality of mortise slot units arranged at intervals along the first axis on the first coupling portion.
In one embodiment, the mortise slot unit is a through slot structure penetrating through the first connection portion.
In one embodiment, the mortise slot unit is a countersink structure that does not penetrate the first connecting portion.
In one embodiment, the second connection portion is any one of a circular, rectangular, and H-shaped steel structure.
In one embodiment, the connecting assembly comprises a clamp and a fastening bolt, the clamp is sleeved outside the mortise and tenon assembly, and the fastening bolt is used for locking the clamp.
In one embodiment, reinforcing rib plates are arranged in each hollow hemisphere.
In one embodiment, the hollow hemisphere is made of Q355 steel, and the first connecting portion and the second connecting portion are made of Q355 steel.
The beneficial effects of the invention are as follows:
1. the first connecting part and the second connecting part are connected through the mortise and tenon joint assembly, the node is simple and attractive in structural form, convenient to connect and clear in force transmission, and the characteristics of the traditional mortise and tenon joint technology in China are reflected.
2. The invention is an assembled connecting node, all the constituent components can be processed and manufactured in a factory and then transported to a construction site for full assembly and installation, and the invention has the advantages of factory processing flow, convenient transportation, convenient installation, short construction period and the like.
3. The invention has high installation precision, and can avoid the problem of manual error caused by field high-altitude welding operation compared with the welding of hollow balls.
4. Compared with the traditional bolt ball node, the steel ball is of a cavity structure, so that the dead weight of the node is effectively reduced, and materials are saved.
5. Compared with the bolt ball node assembled in the same way, the invention avoids the phenomenon of super-screwing or false-screwing when the bolt ball node is assembled.
Drawings
FIG. 1 is a schematic view of the overall structure of a mortise and tenon type hollow ball joint according to an embodiment of the present invention;
FIG. 2 is a schematic view of a mortise and tenon type hollow ball joint according to an embodiment of the present invention;
FIG. 3 is a schematic view of a mortise and tenon assembly according to another embodiment of the mortise and tenon type hollow ball joint of the present invention;
FIG. 4 is a schematic view of a mortise and tenon assembly according to another embodiment of the mortise and tenon type hollow ball joint of the present invention;
fig. 5 is a schematic structural view of a second connecting portion according to another embodiment of the mortise and tenon type hollow ball joint of the present invention;
FIG. 6 is a schematic view of a connecting assembly according to another embodiment of the mortise and tenon type hollow ball joint of the present invention;
fig. 7 is a schematic view of the internal structure of a hollow hemisphere provided by another embodiment of the mortise and tenon type hollow sphere node of the present invention;
FIG. 8 is a schematic view of a structure of a first connecting portion and a second connecting portion according to another embodiment of the mortise and tenon type hollow ball joint of the present invention;
FIG. 9 is a graph showing the results of stress analysis under example condition 1 according to an embodiment of the present invention;
FIG. 10 is a graph showing the result of displacement analysis under example condition 1 according to an embodiment of the present invention;
FIG. 11 is a graph showing the results of stress analysis under example condition 2 according to an embodiment of the present invention;
FIG. 12 is a graph showing the result of displacement analysis under example condition 2 according to an embodiment of the present invention.
Wherein:
100. a hollow sphere; 110. a hollow hemisphere; 111. reinforcing rib plates; 200. a first connection portion; 300. a second connection portion; 400. mortise and tenon assembly; 410. mortise; 420. a tenon; 500. a connection assembly; 510. a clamp; 520. and (5) fastening a bolt.
Detailed Description
The present invention will be further described in detail below with reference to examples, which are provided to illustrate the objects, technical solutions and advantages of the present invention. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The numbering of components herein, such as "first," "second," etc., is used merely to distinguish between the described objects and does not have any sequential or technical meaning. The terms "coupled" and "connected," as used herein, are intended to encompass both direct and indirect coupling (coupling), unless otherwise indicated. In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element in question must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
As shown in fig. 1-12, the mortise and tenon type hollow ball node comprises a hollow ball 100, the hollow ball comprises two hollow hemispheres 110, the two hollow hemispheres 110 are fixedly connected to form the hollow ball 100, the two hollow hemispheres 110 are formed by welding and can be welded in a factory, welding and installation are not needed in a construction site, and when the mortise and tenon type hollow ball node is transported to the construction site, the mortise and tenon type hollow ball node can be put into use only by assembling;
the exterior of the hollow sphere 100 is provided with a plurality of first connection parts 200, the connection form of the first connection parts 200 is welded on the exterior of the hollow sphere 100, the welding is also finished in a factory, wherein the structural form of the first connection parts 200 can be selected according to the specific design requirements of the building structure, such as a circular section or a rectangular section;
the mortise and tenon type hollow ball joint further comprises a plurality of second connecting parts 300, the structural form of the second connecting parts 300 is the same as that of the first connecting parts 200, and steel members with various cross-section forms such as round tubes, H-shaped or square tubes can be connected;
the first coupling part 200 and the second coupling part 300 are coupled by the mortise and tenon assembly 400, and the mortise and tenon assembly 400 is used to restrict the second coupling part 300 from moving in the direction of the first axis or the second axis;
mortise and tenon assembly 400 includes mortise 410 and tenon 420, mortise 410 is opened at one end of first connecting portion 200 far away from hollow sphere 100, tenon 420 is set at one end of second connecting portion 300, mortise 410 and tenon 420 are the most main technical features of mortise and tenon assembly 400, wherein the section types of mortise 410 are also various, and rectangular tooth-shaped section can be adopted, or triangular tooth-shaped section can be adopted, or semicircular tooth-shaped section can be adopted as shown in fig. 2;
it is also within the scope of the present invention to supplement the mortise 410 and tenon 420 by providing the mortise 410 in the second coupling portion 300 and the tenon 420 in the first coupling portion 200 without any other technical modifications.
A connecting assembly 500 is arranged at the joint of the mortise and tenon joint assembly 400, and the connecting assembly 500 is used for limiting the movement of the second connecting part 300 along the third axis direction;
the first axis, the second axis and the third axis are perpendicular to each other.
The first axis is described as a center line along the length of the first connecting portion 200, the second axis is perpendicular to the first axis, a two-dimensional plane is formed by the second axis and the first axis, the third axis is a normal line of the two-dimensional plane, and the third axis passes through an intersection point of the first axis and the second axis.
In one embodiment, the shapes of the mortise 410 and the tenon 420 are adapted, which have two layers of meanings, firstly, the shapes of the mortise 410 and the tenon 420 are identical in the first layer meaning, that is, the tenon 420 can be smoothly installed in the mortise 410, and each outer surface of the tenon 420 can be contacted with the grooved side surface of the mortise 410, so that the tenon 420 cannot shake after being installed in the mortise 410, and therefore, the connecting structure is stable, the force transmission is definite, and in addition, the second layer meaning is that the outer end surface of the tenon 420 is identical to the outer end surface of the mortise 410, and the end surface of the tenon 420 is arc-shaped, for example, a round pipe is used.
In one embodiment, the cross section of the joint between the mortise 410 and the tenon 420 is any one of square or round shape, the main purpose of limitation here is to adapt to various connecting standard components in the market, such as the clamp 510, the clamp 510 most commonly used in the market mainly has two types of square clamp 510 and round clamp 510, the square clamp 510 can be connected with square tubes and H steel structure frames, the round clamp 510 can be connected with steel structure frames of round tubes, the inner surfaces of the two types of clamps 510 are round or square, when the connected shapes of the mortise 410 and the tenon 420 are square or round, the standard components in the market can be directly used for locking, the use cost can be remarkably reduced, and meanwhile, the arrangement also can enable the stress between the clamp 510 and the tenon-and-mortise assembly 400 to be uniform, so that the clamp has great advantages in engineering use.
In one embodiment, the mortise slot 410 includes a plurality of mortise slot units arranged at intervals along the first axis on the first coupling portion 200.
Set up the effect of a plurality of mortise groove units in improving the connection stability of mortise and tenon subassembly 400, disperse the atress degree of mortise and tenon structure. Wherein a plurality of mortise units can be arranged in unequal intervals or in equal intervals. The reason why the tongue-and-groove units are arranged along the first axis on the first connecting portion 200 is that the force can be transmitted definitely, no lateral component exists, and the failure of the mortise and tenon assembly 400 by the lateral component can be avoided, which is a preferred embodiment, and if the mortise units are arranged obliquely and the mortise 420 matched with the oblique arrangement is also naturally realized to limit the movement of the first connecting portion 200 along the first axis or the second axis, the lateral component exists when the force is transmitted, and the service life of the mortise and tenon assembly 400 is reduced.
In one embodiment, the mortise slot unit is a through slot structure penetrating the first coupling portion 200.
The through groove structure is a through groove structure between the upper part and the lower part, and has the advantages of convenient installation and installation without direction identification.
In one embodiment, the mortise slot unit is a countersunk slot structure that does not penetrate the first connecting portion 200.
The sinking groove structure is a non-through groove structure between the bottoms, and has the advantage of stronger bearing capacity.
In one embodiment, the second connection portion 300 is any one of a circular, rectangular, H-shaped steel structure.
Circular refers mainly to a circular tube structure, rectangular refers mainly to a square tube structure, and H-shaped refers to an H-steel structure, which are relatively common types in engineering, and for convenience of description, in the embodiment shown in the drawings, the surfaces of the hollow spheres 100 are respectively provided with a circular tube, a square tube and an H-steel, but in specific engineering construction, the first connection portion 200 installed on each hollow sphere 100 must be any one of the circular tube, the square tube and the H-steel.
In one embodiment, the coupling assembly 500 includes a clip 510 and a fastening bolt 520, the clip 510 being sleeved outside the mortise and tenon assembly 400, the fastening bolt 520 being used to lock the clip 510.
The connecting assembly 500 in the present invention uses standard components as the main shape clamp 510 and the round clamp 510, and is mainly used for preventing the mortise 410 and the tenon 420 from separating when the mortise 410 and the tenon 420 are connected and then sleeved outside the tenon-and-mortise assembly 400.
In one embodiment, a reinforcing web 111 is disposed within each hollow hemisphere 110.
The reinforcing rib plates 111 are provided to improve the deformation resistance of the hollow sphere 100, and can be added according to engineering requirements, and the function is more conventional, but will not be repeated.
In one embodiment, the hollow hemispheres 110 are made of structural steel, and the first and second connecting portions 200, 300 are made of structural steel.
The structural steel is the most common steel type used in the current steel structure, has good use performance, can meet the bearing requirements of most of buildings, and can also use other types of steel according to the requirements in engineering practice.
The invention is simple and convenient to use, when in installation, the mortise 410 and the tenon 420 are required to be butted, then the clamp 510 is opened and buckled at the joint of the mortise 410 and the tenon 420, and then the clamp is locked through the fastening bolt 520, so that the connection is completed.
The mortise type hollow ball node model is imported into finite element analysis software AnsysWoekbend, so that calculation cost is saved, under the condition that accuracy is guaranteed, the mortise type hollow ball node is simplified, half of the node is taken, and only one branch is reserved for modeling. Meanwhile, in order to eliminate the influence of rod deformation on the result, rod parts are removed, only a rod end part model is built, and the tail part of the transition section is directly loaded, and an example model is shown in fig. 8.
In the calculation example model, the diameter of the hollow sphere 100 is 150mm, the wall thickness is 8mm, the length of the rectangular rod piece is 100mm, the section size is 70mm 5mm, the wall thickness is 3mm, the outer diameter of the mortise 410 is 50mm, the tooth width is 5mm, the interval is 5mm, and the tooth height is 3mm; q355 steel is selected as the material property, the yield strength is 355MPa, the elastic modulus is 206GPa, and the Poisson ratio is 0.3; the fastening bolt 520 is a 10.9-stage high-strength bolt, the yield strength is 940MPa, the elastic modulus is 206GPa, and the Poisson's ratio is 0.3. When contact is set, bound contact is set between the steel ball 100 and the mortise 410, friendship contact is set between the mortise 410 and the tenon 420, friendship contact is set between the clamp 510 and the mortise 410 and between the clamp 510 and the tenon 420, no separation contact is set between the clamp 510 and the bolt head and the nut, and the friction coefficient is uniformly set to be 0.15; boundary conditions: setting a fixed constraint at the hemispherical cross section; load conditions: (1) applying 400KN axial tension at the cross section of the outer end of the rod piece, wherein the calculation results of the stress and the displacement are shown in fig. 9 and 10; (2) 400KN of axial pressure is applied to the cross section of the outer end of the rod, and the calculation results of the stress and displacement are shown in fig. 11 and 12.
According to the result of the calculation, the node form of the invention is established, and the force transmission route is clear, the force bearing form is reasonable, and the installation is convenient and quick, so the node form has quite feasibility.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing examples illustrate only a few embodiments of the invention and are described in detail herein without thereby limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims (10)

1. The mortise and tenon type hollow ball joint is characterized by comprising a hollow ball, wherein the hollow ball comprises two hollow hemispheres, and the two hollow hemispheres are fixedly connected to form a hollow ball;
the outside of the hollow sphere is provided with a plurality of first connecting parts;
the mortise and tenon type hollow ball node further comprises a plurality of second connecting parts;
the first connecting part and the second connecting part are connected through a mortise and tenon assembly, and the mortise and tenon assembly is used for limiting the second connecting part to move along the direction of the first axis or the second axis;
the mortise and tenon assembly comprises mortise grooves and tenons, the mortise grooves are formed in one end of the first connecting portion, which is far away from the hollow ball, and the tenons are arranged at one end of the second connecting portion;
the connecting part of the mortise and tenon assembly is provided with a connecting assembly, and the connecting assembly is used for limiting the second connecting part to move along the direction of the third axis;
the first axis, the second axis and the third axis are perpendicular to each other.
2. The mortise and tenon type hollow ball joint according to claim 1, wherein the external shapes of the mortise and tenon are matched.
3. The mortise and tenon type hollow ball joint according to claim 2, wherein the cross section of the joint of the mortise and tenon is any one of square or round.
4. A mortise and tenon type hollow ball joint according to claim 3 wherein the mortise groove includes a plurality of mortise groove units arranged at intervals along the first axis on the first coupling portion.
5. The mortise and tenon type hollow ball joint according to claim 4, wherein said mortise and tenon unit is a through-slot structure penetrating through the first connecting portion.
6. The mortise and tenon type hollow ball joint according to claim 4, wherein said mortise and tenon unit is a countersunk structure which does not penetrate through the first connecting portion.
7. The mortise and tenon type hollow ball joint according to claim 1, wherein the second connecting portion is any one of a circular, rectangular, H-shaped steel structure.
8. The mortise and tenon type hollow ball joint according to claim 1, wherein the connecting assembly comprises a clamp and a fastening bolt, the clamp is sleeved outside the mortise and tenon type assembly, and the fastening bolt is used for locking the clamp.
9. The mortise and tenon type hollow sphere node of claim 1, wherein reinforcing rib plates are arranged in each hollow hemisphere.
10. The mortise and tenon type hollow ball joint according to claim 1, wherein the hollow hemispheres are made of Q355 steel, and the first connecting portion and the second connecting portion are made of Q355 steel.
CN202310262914.4A 2023-03-17 2023-03-17 Mortise and tenon type hollow ball joint Pending CN116145812A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310262914.4A CN116145812A (en) 2023-03-17 2023-03-17 Mortise and tenon type hollow ball joint

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310262914.4A CN116145812A (en) 2023-03-17 2023-03-17 Mortise and tenon type hollow ball joint

Publications (1)

Publication Number Publication Date
CN116145812A true CN116145812A (en) 2023-05-23

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310262914.4A Pending CN116145812A (en) 2023-03-17 2023-03-17 Mortise and tenon type hollow ball joint

Country Status (1)

Country Link
CN (1) CN116145812A (en)

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