Omnibearing limit load resisting limiting device of ship key system and assembling method

Abstract

The invention discloses an omnibearing limit load resisting limiting device of a ship key system and an assembling method.The limiting device comprises a mandrel assembly, an outer sleeve and a base, the outer sleeve is arranged on the base to form a shell, the mandrel assembly extends into the outer sleeve, gaps are formed between the mandrel assembly and the shell in the vertical direction and the radial direction, and the outer sleeve is arranged on the base; the core shaft assembly comprises a core shaft, an upper mounting plate, a limiting column body and elastic bodies arranged on the periphery of the limiting column body, the core shaft, the upper mounting plate and the limiting column body are of an integrated structure, and the outer sleeve is of a split structure; the base comprises a base plate and a barrel; the limiting column body is located in an inner cavity of the split-structure outer sleeve, one end of the mandrel penetrates through the split-structure outer sleeve and is exposed out of the split-structure outer sleeve, and the upper mounting plate is arranged at the end, exposed out of the split-structure outer sleeve, of the mandrel; after the split-structure outer sleeve is installed in the barrel of the base in an interference mode, a connecting piece penetrates through the base plate to be screwed into the bottom of the split-structure outer sleeve, and therefore the base plate and the split-structure outer sleeve are connected together.

Description

Technical Field

[0001] The invention relates to a limit device and an assembly method of the device, in particular to an omnidirectional limit device and an assembly method for a key system of a ship, belonging to the technical field of vibration reduction safety control. Background Art

[0002] During the voyage, ships are prone to extreme loads due to various bad weather or other factors. The extreme loads (i.e. impact loads) are multi-directional, instantaneous, and unpredictable, which can easily cause serious damage to the key systems inside the ship, causing the ship to be unable to sail normally, and even endangering the lives of the crew. Therefore, it is very important to take anti-extreme load limiting measures for the key systems of the ship.

[0003] The application of low-frequency and high-load vibration isolators is precisely to deal with various vibration and impact problems encountered by ships during navigation. This type of vibration isolator has the characteristics of providing large damping and high load-bearing capacity in the low-frequency band, which can effectively isolate and reduce the vibration transmission from power systems such as engines and propellers, and protect the precision equipment and piping systems on the ship. However, when subjected to strong impact, low-frequency and high-load vibration isolators may produce large displacements. If this displacement is not effectively controlled, it may cause damage to components such as pipelines connected to the ship structure. Therefore, the use of limit devices becomes particularly critical. The main function of the limit device is to provide necessary resistance or support when the displacement of the vibration isolator exceeds a certain range, limit its further movement, and thus protect the safety of the ship structure and equipment.

[0004] Compared with the traditional contact limiter, the non-contact limiter has the advantage of not interfering with the normal operation of the vibration isolator. This design not only ensures that the vibration isolation effect of the vibration isolator is not affected under normal working conditions, but also effectively limits the displacement of the raft when an impact occurs, thus achieving dual control of vibration and impact.

[0005] The Chinese invention patent application with application publication number CN116412228A and application publication date July 11, 2023 discloses a variable stiffness non-contact limiter for ships, which includes an upper mounting plate, an inner core assembly, an outer shell, and a bottom plate. The bottom of the outer shell is fixedly connected to the bottom plate to form a mounting shell. The mounting shell contains an inner core assembly, and the inner core assembly has a gap with the inner wall of the mounting shell in the vertical and radial directions to form a non-contact connection structure, which can be used in conjunction with a vibration isolator without affecting the normal working state of the vibration isolator.

[0006] Please refer to paragraph

[0027] and the attached Figure 1 , 3According to the description of the patent document, the inner core component in the patent document is T-shaped, and one end of the inner core component is connected to the upper mounting plate by screws. After assembly, the T-shaped inner core component is located inside the shell, and the bottom plate is connected to the shell by screws.

[0007] The limiter in the patent document has the following problems: 1. In order to facilitate the installation of the T-shaped inner core assembly into the shell, the T-shaped inner core assembly and the upper mounting plate are disassembly structures. When installing, first place the T-shaped inner core assembly into the shell so that one end of the T-shaped inner core assembly extends out of the shell, and then connect the upper mounting plate to the end of the T-shaped inner core assembly extending out of the shell with screws. However, if the T-shaped inner core assembly and the upper mounting plate are connected with screws, when the limiter is subjected to a vertical upward tensile force, the T-shaped inner core assembly will move upward relative to the shell, and the other end of the T-shaped inner core assembly will contact the shell for vertical tensile limiting. At this time, the screws may break or fail due to the huge upward tensile force, thereby causing damage to the limiter; 2. Since the bottom plate is connected to the outer shell by screws, when the limiter is subjected to vertical upward tensile force, the T-shaped inner core assembly will move upward relative to the outer shell, and the other end of the T-shaped inner core assembly will contact the outer shell for vertical tensile limit. Driven by the upward tensile force, the outer shell will also tend to move upward. At this time, since the bottom plate is stationary, the screws connecting the bottom plate and the outer shell will also be subjected to upward tensile force. Therefore, the screws may break and fail, which will also cause damage to the limiter.

[0008] In summary, how to design a limit device so that when performing vertical stretching limit, it can avoid failure problems such as breakage of the connectors between components, thereby ensuring that the limit device can function normally during operation and thus protecting the safety of the ship's key systems is a technical problem that needs to be solved urgently. Summary of the invention

[0009] The technical problem to be solved by the present invention is to provide an all-round anti-extreme load limit device for a key system of a ship in response to the defects existing in the prior art. When performing vertical tensile limiting, it can avoid failure problems such as breakage of connecting parts between components, thereby ensuring that the limit device can function normally during operation, thereby protecting the safety of the key system of the ship.

[0010] In order to solve the above technical problems, the technical solution adopted by the present invention is: an all-round anti-limit load limit device for a key system of a ship, comprising a core shaft assembly, a sleeve and a base, the sleeve is arranged on the base to form a shell, the core shaft assembly extends into the sleeve and there is a gap between the core shaft assembly and the shell in the vertical and radial directions to form a non-contact connection structure, the core shaft assembly comprises a core shaft, an upper mounting plate arranged on one end of the core shaft, a limit column arranged on the other end of the core shaft and an elastomer arranged around the limit column, the core shaft, the upper mounting plate and the limit The positioning cylinder is an integral structure, and the outer sleeve is a split structure, which is surrounded by multiple split outer sleeves; the base includes a base plate and a cylinder arranged on the base plate; the limiting cylinder is located in the inner cavity of the split structure outer sleeve, one end of the core shaft passes through the split structure outer sleeve and is exposed from the split structure outer sleeve, and the upper mounting plate is arranged on one end of the core shaft exposed from the split structure outer sleeve; after the split structure outer sleeve is interference-fitted in the cylinder of the base, a connecting piece is used to pass through the base plate and be screwed into the bottom of the split structure outer sleeve, thereby connecting the base plate and the split structure outer sleeve together.

[0011] Preferably, the split sleeve is arranged in an inverted L shape, and the vertical gap between the core shaft assembly and the shell includes a gap H1 between the elastomer wrapped on the upper surface of the limiting column and the inner top surface of the split sleeve, a gap H2 between the elastomer wrapped on the lower surface of the limiting column and the top surface of the base plate, and a gap H3 between the bottom surface of the upper mounting plate and the outer top surface of the split sleeve, wherein the gap H3>the gap H2.

[0012] Preferably, a protruding limiting block is further provided on the upper surface of the limiting column, and the distance between the inner top surface of the split jacket and the limiting block is set to a gap four H4, and the gap four H4>the gap one H1.

[0013] Preferably, after a plurality of inverted L-shaped split outer sleeves are enclosed to form an outer sleeve, an outer sleeve through hole is formed at the middle position of the top surface of the outer sleeve, and the core shaft passes through the outer sleeve through hole. The radial gap between the core shaft assembly and the shell includes a gap H5 between the elastomer wrapped around the side circumference of the limiting cylinder and the inner circumference of the split outer sleeve and a gap H6 between the inner circumference of the outer sleeve through hole and the outer circumference of the core shaft, and the gap H6>the gap H5.

[0014] Preferably, the limiting cylinder is an inverted cone, and its side circumference is an inclined conical surface. The elastomer wrapped around the side circumference of the limiting cylinder is also inclined. The inner circumference of the split sleeve is also arranged as an inclined surface. The elastomer wrapped around the side circumference of the limiting cylinder and the inner circumference of the split sleeve are parallel to each other.

[0015] The present invention also discloses an assembly method of the all-round anti-extreme load limit device as described above, which comprises first enclosing the split structure sleeve on the outside of the core shaft assembly so that the limit column is located inside the split structure sleeve and the upper mounting plate is located outside the split structure sleeve, and then the split structure sleeve with the core shaft assembly is interference fit into the cylinder of the base, and then the base plate and the split structure sleeve are connected together through a connecting piece.

[0016] Preferably, the split outer sleeve is arranged in an inverted L shape, and the vertical gap between the core shaft assembly and the housing includes a gap H1 between the elastic body wrapped on the upper surface of the limiting cylinder and the inner top surface of the split outer sleeve, a gap H2 between the elastic body wrapped on the lower surface of the limiting cylinder and the top surface of the base plate, and a gap H3 between the bottom surface of the upper mounting plate and the outer top surface of the split outer sleeve, wherein the gap H3>the gap H2; When subjected to a vertical downward compressive force, the core shaft assembly moves downward relative to the outer sleeve. During the downward movement, the elastomer wrapped around the lower surface of the limiting column first makes elastic buffering contact with the top surface of the base plate. Then, during the continued downward movement, a vertical downward limiting structure is formed by making rigid contact between the bottom surface of the upper mounting plate and the outer top surface of the split outer sleeve.

[0017] Preferably, a protruding limiting block is further provided on the upper surface of the limiting column, and the distance between the inner top surface of the split jacket and the limiting block is set to a gap of four H4, and the gap of four H4> the gap of one H1; When subjected to a vertical upward tensile force, the core shaft assembly moves upward relative to the outer sleeve. During the upward movement, the elastomer wrapped around the upper surface of the limiting column first makes elastic buffering contact with the inner top surface of the split outer sleeve. Then, during the continued upward movement, a vertical upward limiting structure is formed by making rigid contact between the inner top surface of the split outer sleeve and the top surface of the limiting block.

[0018] Preferably, after a plurality of inverted L-shaped split outer sleeves are enclosed to form an outer sleeve, an outer sleeve through hole is formed at the middle position of the top surface of the outer sleeve, and the core shaft passes through the outer sleeve through hole. The radial gap between the core shaft assembly and the shell includes a gap H5 between the elastic body wrapped on the side circumference of the limiting cylinder and the inner circumference of the split outer sleeve and a gap H6 between the inner circumference of the outer sleeve through hole and the outer circumference of the core shaft, and the gap H6>the gap H5; When subjected to radial force, the core shaft assembly moves radially relative to the outer sleeve. During the radial movement, the elastomer wrapped around the side circumference of the limiting cylinder first makes elastic buffering contact with the inner circumference of the split outer sleeve. Then, during the continued radial movement, a radial limiting structure is formed by rigid contact between the inner circumference of the through hole of the outer sleeve and the outer circumference of the core shaft.

[0019] The beneficial effects of the present invention are as follows: the present invention designs the mandrel assembly consisting of the mandrel, the upper mounting plate and the limiting column into an integrated structure, and its components do not need to be connected by screws like in the prior art. When subjected to vertical upward tensile force, the mandrel assembly with an integrated structure can withstand a greater force; however, after the mandrel assembly is designed as an integrated structure, its cross-section forms an I-shaped shape with large ends and a small middle, and it cannot be placed in an integral housing like in the prior art during assembly. Therefore, the present invention designs the outer shell into a split structure to facilitate the assembly of the mandrel assembly with an integrated structure; in addition, the split structure outer shell is assembled to the base through interference force In this way, in addition to the connection structure formed by bolts and other connecting parts, the connection structure between the outer jacket and the base also adds an interference connection structure between the outer jacket and the base. When subjected to vertical upward tensile force, the connection structure formed by bolts and other connecting parts and the interference connection structure between the outer jacket and the base jointly bear the upward tensile force. Therefore, through the joint improvement of the above-mentioned aspects, the tensile strength of the limit device in the present invention is greatly increased. When performing vertical tensile limiting, it can avoid failure problems such as breakage of the connecting parts between the components, thereby ensuring that the limit device can function normally during operation, thereby protecting the safety of the key systems of the ship. When performing vertical tensile limiting, the limit block is used to make rigid contact with the split outer jacket, thereby avoiding the elastomer wrapped on the upper surface of the limit column from being crushed during further movement, thereby increasing the service life of the limit device. Through structural design, the present invention can first perform elastic buffer contact in the vertical and radial directions, and then perform rigid limiting, thereby better protecting the key systems of the ship. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the axial cross-sectional structure of the limiting device in the embodiment of the present invention when it is not working; Figure 2 This is a schematic diagram of the axial cross-sectional structure of the limiting device before assembly in an embodiment of the present invention; Figure 3 It is a schematic diagram of the axial cross-sectional structure of the core shaft assembly in an embodiment of the present invention; Figure 4 This is a schematic diagram of the axial cross-sectional structure of the limit device after assembly in an embodiment of the present invention; In the figure: 1. mandrel assembly, 111. mandrel, 112. upper mounting plate, 113. limiting column, 114. elastomer, 2. outer jacket, 211. split outer jacket, 212. outer jacket through hole, 3. base, 311. base plate, 312. cylinder, 4. key ship system, 5. component below the hull, 6. upper connecting piece, 7. lower connecting piece, 8. connecting piece, 9. limiting block. DETAILED DESCRIPTION

[0021] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0022] Example: Figures 1 to 3 As shown, the height direction of the limit device is set to the vertical direction (Z direction), and the horizontal direction perpendicular to the vertical direction (Z direction) is set to the radial direction (X direction). An all-round limit device for critical ship systems against extreme loads comprises a mandrel assembly 1, a jacket 2 and a base 3, wherein the mandrel assembly 1 is connected to a critical ship system 4 to be protected, the jacket 2 is connected to the base 3 to form a shell, the base 3 is connected to a member 5 below the hull, the mandrel assembly 1 extends into the jacket 2 and there is a gap between the mandrel assembly 1 and the shell in the vertical and radial directions, forming a non-contact connection structure.

[0023] The core shaft assembly 1 includes a core shaft 111, an upper mounting plate 112 arranged on one end of the core shaft 111, a limiting column 113 arranged on the other end of the core shaft 111, and an elastic body 114, such as rubber, arranged around the limiting column 113. The core shaft 111, the upper mounting plate 112 and the limiting column 113 are an integral structure, and the axial cross-section of the core shaft assembly 1 is an I-shaped shape. The outer sleeve 2 is a split structure, which is surrounded by a plurality of split outer sleeves 211. The base 3 includes a base plate 311 and a cylinder 312 arranged on the base plate 311. After assembly, the limiting column 113 and the elastic body 114 are located in the inner cavity of the split structure outer sleeve 2, one end of the core shaft 111 passes through the split structure outer sleeve 2 and is exposed to the split structure outer sleeve 2, and the upper mounting plate 112 is arranged on one end of the core shaft 111 exposed to the split structure outer sleeve 2. After the split structure jacket 2 is interference-fitted in the cylinder 312 of the base 3, a connecting member 8 such as a bolt is used to pass through the base plate 311 and screwed into the bottom of the split structure jacket 2, thereby connecting the base plate 311 and the split structure jacket 2 together. The upper mounting plate 112 is connected to the bottom of the key ship system 4 to be protected through the upper connecting member 6, and the base plate 311 is installed on the lower member 5 of the hull through the lower connecting member 7, so that the key ship system 4 is protected by the limiting device.

[0024] In the above scheme, the core shaft assembly consisting of the core shaft, the upper mounting plate and the limiting column is designed to be an integrated structure, and its components do not need to be connected by screws like the prior art. When subjected to vertical upward tensile force, the core shaft assembly with an integrated structure can withstand a greater force; however, after the core shaft assembly is designed to be an integrated structure, its cross-section forms an I-shaped shape with large ends and a small middle, and it cannot be placed in an integral housing like in the prior art during assembly. Therefore, the outer shell is designed as a split structure in this embodiment to facilitate the assembly of the core shaft assembly with an integrated structure; in addition, the split structure outer shell is assembled to the base by interference force. This In addition to the connection structure formed by bolts and other connecting parts, the connection structure between the outer jacket and the base also has an interference connection structure between the outer jacket and the base. When subjected to a vertical upward tensile force, the connection structure formed by bolts and other connecting parts and the interference connection structure between the outer jacket and the base jointly withstand the upward tensile force. Therefore, through the joint improvements in the above aspects, the tensile strength of the limit device in this embodiment is greatly increased. When performing vertical tensile limiting, failure problems such as breakage of the connecting parts between the components can be avoided, thereby ensuring that the limit device can function normally during operation, thereby protecting the safety of the ship's key systems.

[0025] The assembly method of this embodiment is as follows: first, enclose the split structure sleeve 2 on the outside of the core shaft assembly 1, so that the limiting column 113 is located inside the split structure sleeve 2, and the upper mounting plate 112 is located outside the split structure sleeve 2, and then the split structure sleeve 2 with the core shaft assembly 1 is interference fit into the cylinder 312 of the base 3, and then the base plate 311 and the split structure sleeve 2 are connected together by connecting parts 8 such as bolts.

[0026] like Figure 2 and Figure 4 As shown, the axial cross section of the split sleeve 211 is set to an inverted L shape, and the vertical gap between the core shaft assembly 1 and the sleeve 2 includes a gap H1 between the elastic body 114 wrapped on the upper surface of the limiting cylinder 113 and the inner top surface of the split sleeve 211, a gap H2 between the elastic body 114 wrapped on the lower surface of the limiting cylinder 113 and the top surface of the base plate 311, and a gap H3 between the bottom surface of the upper mounting plate 112 and the outer top surface of the split sleeve 211, wherein the gap Three H3>Gap Two H2; when subjected to a vertical downward compressive force, the core shaft assembly 1 moves downward relative to the outer sleeve 2. During the downward movement, since the gap three H3>Gap Two H2, the elastomer 114 wrapped around the lower surface of the limiting column 113 and the top surface of the base plate 311 first make elastic buffering contact, and then in the process of continuing to move downward, the bottom surface of the upper mounting plate 112 and the outer top surface of the split outer sleeve 211 make rigid contact to form a vertical downward limiting structure.

[0027] like Figure 3 and Figure 4 As shown, a protruding limiting block 9 is also provided on the upper surface of the limiting column 113, and the distance between the inner top surface of the split outer sleeve 211 and the limiting block 9 is set to a gap 4 H4, then the gap 4 H4> the gap 1 H1; when subjected to a vertical upward tensile force, the core shaft assembly 1 moves upward relative to the outer sleeve 2, and in the process of upward movement, since the gap 4 H4> the gap 1 H1, the elastomer 114 wrapped on the upper surface of the limiting column 113 and the inner top surface of the split outer sleeve 211 first make elastic buffer contact, and then in the process of continuing to move upward, the inner top surface of the split outer sleeve 211 and the top surface of the limiting block 9 make rigid contact to form a vertical upward limiting structure. In this design, the limiting block is in rigid contact with the split outer sleeve, thereby avoiding the elastomer wrapped on the upper surface of the limiting column from being crushed during further movement, thereby increasing the service life of the limiting device.

[0028] After a plurality of inverted L-shaped split sleeves 211 are enclosed to form a sleeve 2, a sleeve through hole 212 is formed at the middle position of the top surface of the sleeve 2, and the core shaft 111 passes through the sleeve through hole 212. The radial gap between the core shaft assembly 1 and the sleeve 2 includes a gap H5 between the elastic body 114 wrapped around the side circumference of the limiting cylinder 113 and the inner circumference of the split sleeve 211 and a gap H6 between the inner circumference of the sleeve through hole 212 and the outer circumference of the core shaft 111. The gap H6 is H6>gap five H5; when subjected to radial force, the core shaft assembly 1 moves radially relative to the outer sleeve 2. During the radial movement, since the gap six H6>gap five H5, the elastomer 114 wrapped around the side circumference of the limiting column 113 and the inner circumference of the split outer sleeve 211 first make elastic buffering contact, and then in the process of continuing radial movement, the inner circumference of the outer sleeve through hole 212 and the outer circumference of the core shaft 111 make rigid contact to form a radial limiting structure.

[0029] Through the above structural design, this embodiment can first perform elastic buffering contact in the vertical and radial directions, and then perform rigid limiting, so as to better protect the key systems of the ship.

[0030] The elastic body 114 wrapped around the side circumference of the limiting cylinder 113 is arranged parallel to the inner circumference of the split jacket 211. In this embodiment, the limiting cylinder 113 is arranged as an inverted cone with the large end at the top and the small end at the bottom, and its side circumference is an inclined cone. Therefore, the elastic body 114 wrapped around the side circumference of the limiting cylinder 113 is also arranged at an inclination. In order to make the inner circumference of the split jacket 211 parallel to it, the inner circumference of the split jacket 211 is also arranged as an inclined surface. The gap 1 H1, gap 2 H2 and gap 5 H5 refer to the distance between the outer side surface of the elastic body 114 wrapped around the inverted cone limiting cylinder 113 and the inner surface of the shell. This distance is the working gap H of the vibration isolator, and the working gap H of the vibration isolator is the normal working range of the vibration isolator. The working gap H of the vibration isolator can be adjusted according to the actual working conditions. When the critical system of the ship is subjected to an extreme load, the critical system of the ship moves relative to the components below the hull within the range of the working gap H of the isolator, and the core shaft assembly 1 moves with the critical system of the ship relative to the outer sleeve 2 within the range of the working gap H of the isolator. At this time, the isolator plays a role in isolating and protecting the critical system of the ship, while the core shaft assembly 1 and the outer sleeve 2 are not in contact and therefore do not work; when the extreme load is too large, so that the movement range of the critical system of the ship relative to the components below the hull exceeds the range of the working gap H of the isolator, at this time, the core shaft assembly 1 and the outer sleeve 2 begin to contact and perform limiting work, providing necessary resistance or support, and limiting its further movement, thereby protecting the safety of the critical system of the ship.

[0031] In summary, the present invention designs the mandrel assembly consisting of the mandrel, the upper mounting plate and the limiting column into an integrated structure, and its components do not need to be connected by screws like the prior art. When subjected to vertical upward tensile force, the mandrel assembly with an integrated structure can withstand a greater force; however, after the mandrel assembly is designed as an integrated structure, its cross-section forms an I-shaped shape with large ends and a small middle, and it cannot be placed in an integral housing like in the prior art during assembly. Therefore, the present invention designs the outer shell into a split structure to facilitate the assembly of the mandrel assembly with an integrated structure; in addition, the split structure outer shell is assembled to the base by interference force, so that In addition to the connection structure formed by bolts and other connectors, the connection structure between the outer jacket and the base also has an interference connection structure between the outer jacket and the base. When subjected to vertical upward tensile force, the connection structure formed by bolts and other connectors and the interference connection structure between the outer jacket and the base jointly withstand the upward tensile force. Thus, through the joint improvements in the above aspects, the tensile strength of the limit device in the present invention is greatly increased. When performing vertical tensile limiting, it is possible to avoid failure problems such as breakage of the connectors between the components, thereby ensuring that the limit device can function normally during operation, thereby protecting the safety of the key systems of the ship. When performing vertical tensile limiting, the limit block is used to make rigid contact with the split outer jacket, thereby avoiding squeezing of the elastomer wrapped on the upper surface of the limit column during further movement, thereby increasing the service life of the limit device. Through structural design, the present invention can first perform elastic buffer contact in the vertical and radial directions, and then perform rigid limiting, thereby better protecting the key systems of the ship.

[0032] The "multiple" mentioned in this embodiment refers to the number of "two or more". The above embodiments are only used to illustrate the present invention, but not to limit the present invention. Those skilled in the relevant technical field can make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should also belong to the protection scope of the present invention, and the protection scope of the present invention should be defined by the claims.

Claims

1. An all-round anti-limit load limit device for a key system of a ship, comprising a core shaft assembly, a jacket and a base, wherein the jacket is arranged on the base to form a shell, the core shaft assembly extends into the jacket and there is a gap between the core shaft assembly and the shell in the vertical and radial directions to form a non-contact connection structure, the core shaft assembly comprises a core shaft, an upper mounting plate arranged on one end of the core shaft, a limit column arranged on the other end of the core shaft and an elastic body arranged around the limit column, characterized in that: The core shaft, the upper mounting plate and the limiting column are an integrated structure, the outer sleeve is a split structure, which is surrounded by a plurality of split outer sleeves; the base includes a base plate and a cylinder arranged on the base plate; the limiting column is located in the inner cavity of the split structure outer sleeve, one end of the core shaft passes through the split structure outer sleeve and is exposed from the split structure outer sleeve, and the upper mounting plate is arranged on one end of the core shaft exposed from the split structure outer sleeve; After the split structure outer sleeve is interference-fitted in the cylinder of the base, a connecting piece is used to pass through the base plate and screwed into the bottom of the split structure outer sleeve, thereby connecting the base plate and the split structure outer sleeve together.

2. The all-round anti-limit load limiting device according to claim 1, characterized in that: The split sleeve is arranged in an inverted L shape, and the vertical gap between the core shaft assembly and the shell includes a gap H1 between the elastomer wrapped on the upper surface of the limiting column and the inner top surface of the split sleeve, a gap H2 between the elastomer wrapped on the lower surface of the limiting column and the top surface of the base plate, and a gap H3 between the bottom surface of the upper mounting plate and the outer top surface of the split sleeve, wherein the gap H3>the gap H2.

3. The all-round anti-limit load limiting device according to claim 2 is characterized in that: A protruding limiting block is also provided on the upper surface of the limiting column, and the distance between the inner top surface of the split jacket and the limiting block is set to a gap four H4, and the gap four H4>the gap one H1.

4. The all-round anti-limit load limiting device according to claim 3 is characterized in that: After a plurality of inverted L-shaped split outer sleeves are enclosed to form an outer sleeve, an outer sleeve through hole is formed at the middle position of the top surface of the outer sleeve, and the core shaft passes through the outer sleeve through hole. The radial gap between the core shaft assembly and the shell includes a gap H5 between the elastomer wrapped on the side circumference of the limiting cylinder and the inner circumference of the split outer sleeve and a gap H6 between the inner circumference of the outer sleeve through hole and the outer circumference of the core shaft, and the gap H6>the gap H5.

5. The all-round anti-limit load limiting device according to claim 4 is characterized in that: The limiting cylinder is an inverted cone, and its side surface is an inclined cone surface. The elastomer wrapped around the side surface of the limiting cylinder is also inclined. The inner surface of the split sleeve is also arranged as an inclined surface. The elastomer wrapped around the side surface of the limiting cylinder and the inner surface of the split sleeve are parallel to each other.

6. A method for assembling the omnidirectional anti-limit load limit device according to any one of claims 1 to 5, characterized in that: The split structure sleeve is first enclosed on the outside of the core shaft assembly so that the limiting column is located inside the split structure sleeve and the upper mounting plate is located outside the split structure sleeve. The split structure sleeve with the core shaft assembly is then interference fit into the cylinder of the base, and the base plate and the split structure sleeve are connected together through a connecting piece.

7. The assembly method according to claim 6, characterized in that: The split outer sleeve is arranged in an inverted L shape, and the vertical gap between the core shaft assembly and the housing includes a gap H1 between the elastic body wrapped on the upper surface of the limiting cylinder and the inner top surface of the split outer sleeve, a gap H2 between the elastic body wrapped on the lower surface of the limiting cylinder and the top surface of the base plate, and a gap H3 between the bottom surface of the upper mounting plate and the outer top surface of the split outer sleeve, wherein the gap H3>the gap H2; When subjected to a vertical downward compressive force, the core shaft assembly moves downward relative to the outer sleeve. During the downward movement, the elastomer wrapped around the lower surface of the limiting column first makes elastic buffering contact with the top surface of the base plate. Then, during the continued downward movement, a vertical downward limiting structure is formed by making rigid contact between the bottom surface of the upper mounting plate and the outer top surface of the split outer sleeve.

8. The assembly method according to claim 7, characterized in that: A protruding limiting block is also provided on the upper surface of the limiting column, and the distance between the inner top surface of the split jacket and the limiting block is set to a gap of four H4, and the gap of four H4> the gap of one H1; When subjected to a vertical upward tensile force, the core shaft assembly moves upward relative to the outer sleeve. During the upward movement, the elastomer wrapped around the upper surface of the limiting column first makes elastic buffering contact with the inner top surface of the split outer sleeve. Then, during the continued upward movement, a vertical upward limiting structure is formed by making rigid contact between the inner top surface of the split outer sleeve and the top surface of the limiting block.

9. The assembly method according to claim 8, characterized in that: After a plurality of inverted L-shaped split outer sleeves are enclosed to form an outer sleeve, an outer sleeve through hole is formed at the middle position of the top surface of the outer sleeve, and the core shaft passes through the outer sleeve through hole. The radial gap between the core shaft assembly and the shell includes a gap H5 between the elastic body wrapped on the side circumference of the limiting cylinder and the inner circumference of the split outer sleeve and a gap H6 between the inner circumference of the outer sleeve through hole and the outer circumference of the core shaft, and the gap H6>the gap H5; When subjected to radial force, the core shaft assembly moves radially relative to the outer sleeve. During the radial movement, the elastomer wrapped around the side circumference of the limiting cylinder first makes elastic buffering contact with the inner circumference of the split outer sleeve. Then, during the continued radial movement, a radial limiting structure is formed by rigid contact between the inner circumference of the through hole of the outer sleeve and the outer circumference of the core shaft.

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