Steel wire rope variable stiffness vibration isolator

Abstract

The utility model discloses a steel wire rope variable stiffness vibration isolator which comprises a disc-shaped steel framework used for winding a steel wire rope, a disc-shaped upper cover used for covering the disc-shaped steel framework, and a plurality of annular third through holes formed in the edge of the outer side of the disc-shaped upper cover. A bottom plate is flexibly arranged at the lower part of the disc-shaped steel framework and is used for supporting the disc-shaped steel framework; a plurality of fourth through holes which are annularly distributed are formed in the edge of the outer side of the bottom plate, and the third through holes and the fourth through holes are the same in number, vertically corresponding in position and the same in hole diameter; springs are arranged between the vertically-corresponding through holes, bolts penetrating through the fourth through holes in the pair of through holes are inserted into the third through holes in the pair of through holes, threaded rod parts of the bolts penetrate through the springs, and the diameter of the threaded rod parts of the bolts is smaller than the diameter of the fourth through holes. The part, extending out of the fourth through hole, of the bolt is used for being fixed to equipment to be subjected to vibration isolation.

Description

Technical Field

[0001] The utility model relates to the technical field of vibration isolators, in particular to a steel wire rope variable stiffness vibration isolator. Background Art

[0002] Vibration isolation technology is widely used in mechanical engineering, building structures, transportation, and other fields to reduce the impact of equipment vibration on the surrounding environment and protect equipment from external vibrations. Traditional vibration isolators primarily include steel cylindrical coil springs and rubber springs. These mostly use linear springs, which exhibit linear force variations and are prone to resonance, resulting in poor vibration isolation effectiveness.

[0003] One method in the prior art is to use linear spring isolators, such as steel cylindrical coil springs or rubber spring isolators. The force changes of these isolators are linear, which easily causes resonance and poor vibration isolation effect. Among the vibration isolators currently used, most are steel cylindrical coil springs or rubber springs. Their force changes are linear, which causes many problems such as poor resonance stability. To prevent these problems, measures such as adding damping or making special-shaped springs are used. Wire rope isolators are well used because they are subjected to nonlinear force changes. However, the connection and fixation between the units of the current wire rope isolators require a large space, so the load capacity, volume ratio, shape (long strip) and usage selection are greatly limited. Long-term use easily causes fatigue and most of them are not firm. The vibration isolators are prone to resonance and have limited load capacity. Utility Model Content

[0004] This specification provides a wire rope variable stiffness vibration isolator to overcome at least one technical problem existing in the related art.

[0005] According to an embodiment of this specification, a wire rope variable stiffness vibration isolator is provided, comprising:

[0006] A disc-shaped steel frame, wherein the upper end of the disc-shaped steel frame is provided with a plurality of first through holes evenly arranged in a ring shape and a plurality of second through holes evenly arranged in a ring shape, the number of the first through holes and the number of the second through holes are both N; wherein the first through holes are located in the inner circle of the second through holes; wherein the plurality of first through holes are numbered in sequence in a clockwise direction, the plurality of first through holes are numbered in sequence from number 1 in a clockwise direction, and the plurality of second through holes are numbered in sequence from number 1 in a clockwise direction, and the plurality of first through holes are numbered in sequence from number 1 in the disc-shaped steel frame. A steel wire rope is passed through a first through-hole numbered 1 among the plurality of first through-holes along a predetermined path; wherein the steel wire rope exits from a first through-hole numbered n among the plurality of first through-holes and then enters from a second through-hole numbered n+1 among the plurality of second through-holes, where n is less than or equal to N-1; wherein the steel wire rope exits from a first through-hole numbered N among the plurality of first through-holes and then enters from a second through-hole numbered 1 among the plurality of second through-holes, thereby forming a plurality of arc-shaped steel wire rope support substructures; wherein the steel wire rope portion located at the lower portion of the disc-shaped steel frame is tightened;

[0007] A disc-shaped upper cover is flexibly provided on the upper part of the disc-shaped steel frame. The disc-shaped upper cover is used to cover the disc-shaped steel frame. The disc-shaped upper cover is made of metal material. A plurality of annular third through holes are opened at the outer edge of the disc-shaped upper cover.

[0008] A bottom plate is flexibly provided at the lower portion of the disc-shaped steel frame. The bottom plate is made of a metal material and is used to support the disc-shaped steel frame. A plurality of fourth through holes are formed at the outer edge of the bottom plate. The third through holes and the fourth through holes are the same in number, located in corresponding positions, and have the same aperture.

[0009] Each third through hole and fourth through hole corresponding to each other in the upper and lower positions form a pair of through holes, a spring is arranged between the pair of through holes, a bolt passing through the fourth through hole in the pair of through holes is inserted from the third through hole in the pair of through holes, the threaded rod portion of the bolt passes through the spring, the diameter of the threaded rod portion of the bolt is smaller than the aperture size of the fourth through hole, and the portion of the bolt protruding from the fourth through hole is used to be fixed to the equipment to be vibration isolated.

[0010] Preferably, a fifth through hole is provided in the central portion of the disc-shaped steel frame, the aperture of the fifth through hole is larger than the aperture of the first through hole, and the fifth through hole is used to reduce the weight of the disc-shaped steel frame.

[0011] Preferably, the steel wire rope is made of high-strength carbon steel wire.

[0012] Preferably, the space between the bottom plate and the disc-shaped upper cover is filled with nitrile rubber, and the nitrile rubber is used to provide continuous elastic buffering during vibration isolation.

[0013] The beneficial effects of the embodiments of this specification are as follows: The steel wire ropes on the upper portion of the steel frame in the technical solution of this application form several arc-shaped support substructures. Each arc-shaped support substructure can be viewed as a triangular truss structure. A triangular truss structure is an architectural pattern in which components are securely connected in a triangular layout to form a whole. Based on the principle of triangular stability, this structure is highly stable and can effectively maintain its shape and mechanical properties when subjected to stress. When the vibration isolator is subjected to complex vibration loads, each triangular unit accurately decomposes and transmits the force, quickly dispersing it to the metal cover and steel frame, effectively preventing local damage that may result from stress concentration, preventing structural deformation and instability, and ensuring the reliable implementation of the vibration isolation function. Compared to traditional structures, this efficient transmission mechanism fully utilizes the material mechanical properties of the steel wire ropes, significantly improving their ability to operate stably under complex working conditions and providing continuous and stable vibration isolation support for the equipment. At the same time, this structure shortens the original steel wire ropes. Only by increasing the external force can a greater torque be generated, increasing the local stress in the wire ropes in all directions. Therefore, its load can be several times greater than that of existing vibration isolators. At the same time, due to the use of a completely different connection method, the load capacity, volume ratio and shape (truncated cone) have undergone significant changes, namely, strong load capacity, small volume and truncated cone shape, all of which provide greater space for use selection. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of this specification or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 A schematic plan view of a steel frame and a steel wire rope wound thereon in a steel wire rope variable stiffness vibration isolator provided in one embodiment of this specification;

[0016] Figure 2 for Figure 1 A schematic diagram of the three-dimensional structure of the steel frame and the steel wire rope wound thereon;

[0017] Figure 3 A schematic diagram for illustrating a winding method of a steel wire rope in a steel wire rope variable stiffness vibration isolator provided in an embodiment of this specification;

[0018] Figure 4 A schematic diagram of the three-dimensional structure of the disc-shaped upper cover and the third through hole opened thereon in the steel wire rope variable stiffness vibration isolator provided in an embodiment of this specification;

[0019] Figure 5 This is a schematic diagram of the three-dimensional structure of the bottom plate and the fourth through hole opened thereon in the wire rope variable stiffness vibration isolator provided in an embodiment of this specification.

[0020] Figure 6 A schematic diagram of a flexible connection between a disc-shaped upper cover and a bottom plate of a wire rope variable stiffness vibration isolator provided in an embodiment of this specification using bolts;

[0021] Figure 7 A schematic plan view of a steel wire rope variable stiffness vibration isolator provided in another embodiment of this specification;

[0022] Figure 8 This is a theoretical diagram of the force characteristics of the wire rope in a traditional wire rope isolator;

[0023] Figure 9 This is a theoretical schematic diagram of the stress characteristics of a wire rope in a wire rope variable stiffness vibration isolator provided in an embodiment of this specification.

[0024] Among them, 1 represents a disc-shaped steel frame, 101 represents a first through hole, 102 represents a second through hole, 2 represents a steel wire rope, 3 represents a disc-shaped upper cover, 31 represents a third through hole, 4 represents a bottom plate, 41 represents a fourth through hole, 5 represents a bolt, 6 represents a tensioning steel wire rope, 7 represents a steel wire rope fixing plate, 8 represents a bottom plate, 9 represents a supporting steel wire rope, 10 represents an upper cover, and 11 represents nitrile rubber. DETAILED DESCRIPTION

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0026] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0027] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0028] The embodiment of this specification provides a wire rope variable stiffness vibration isolator, which is mainly composed of a disc-shaped upper cover 3, a disc-shaped steel frame 1 and a bottom plate 4 from top to bottom. Among them, the disc-shaped steel frame 1 is mainly used to wind the wire rope for vibration isolation, the disc-shaped upper cover 3 is mainly used to bear external loads and transfer the external load to the wire rope wound on the disc-shaped steel frame 1, and the bottom plate 4 is used to support the disc-shaped steel frame 1 and disperse the load to the equipment to be isolated. Figures 1 to 9 The structure of the steel wire rope variable stiffness vibration isolator provided by the utility model is introduced.

[0029] The wire rope variable stiffness vibration isolator first includes a disc-shaped steel frame 1. Figure 1 and Figure 2 First, the disc-shaped steel frame 1 and the method of winding the steel wire rope thereon are described. Figure 1 As shown, Figure 1 This is a schematic plan view of a steel frame 1 and a steel wire rope wound thereon in a steel wire rope variable stiffness vibration isolator provided in one embodiment of this specification. Figure 2 for Figure 1 Schematic diagram of the three-dimensional structure of the steel frame and the steel wire rope wrapped around it. Figure 1As shown, the upper end of the disc-shaped steel frame 1 is provided with a plurality of first through holes 101 and a plurality of second through holes 102 arranged in a ring shape. The number of the first through holes 102 and the number of the second through holes 102 are both N. The first through holes 101 are located in the inner circle of the second through holes 102. The plurality of first through holes are numbered in sequence in a clockwise direction, the plurality of first through holes are numbered in sequence from number 1 in a clockwise direction, and the plurality of second through holes are numbered in sequence from number 1 in a clockwise direction. 1, a steel wire rope 2 is wound along a predetermined path starting from a first through hole numbered 1 among the plurality of first through holes; wherein, the steel wire rope 2 comes out from a first through hole numbered n among the plurality of first through holes and then enters a second through hole numbered n+1 among the plurality of second through holes, where n is less than or equal to N-1; the steel wire rope 2 comes out from a first through hole numbered N among the plurality of first through holes and then enters a second through hole numbered 1 among the plurality of second through holes, thereby forming a plurality of arc-shaped steel wire rope support substructures, wherein the steel wire rope portion located at the lower part of the disc-shaped steel frame is tightened.

[0030] The wire rope variable stiffness vibration isolator also includes a disc-shaped upper cover 3 flexibly arranged on the upper part of the disc-shaped steel frame 1. Figure 4 As shown, Figure 4 This is a schematic diagram of the three-dimensional structure of the disc-shaped upper cover and the third through-hole opened thereon in the variable-stiffness vibration isolator for the wire rope provided in the embodiment of this specification. The disc-shaped upper cover 3 is used to cover the disc-shaped steel frame 1 to which it belongs. The disc-shaped upper cover 3 is made of metal material, and a plurality of annular third through-holes 31 are opened at the outer edge of the disc-shaped upper cover 3. The upper cover 3 can be a key protective barrier for internal components. It tightly covers the core components such as the wire rope 2 and the steel frame 1 to prevent the intrusion of external dust, water vapor, oil and impurities. For example, in the vibration isolation application of equipment in dusty factory workshops, the upper cover 3 can also prevent dust from settling and corroding the wire rope, interfering with the mechanical properties of the frame, maintaining the interior clean and dry, ensuring the functional stability of each component and extending its service life.

[0031] A bottom plate 4 is flexibly provided at the bottom of the disc-shaped steel frame 1. Figure 5 As shown, Figure 5 A schematic diagram of the three-dimensional structure of the base plate and the fourth through hole opened on the base plate in the wire rope variable stiffness isolator provided in an embodiment of this specification, wherein the base plate 4 is made of metal material and is used to support the disc-shaped steel frame 1; a plurality of annularly distributed fourth through holes 41 are opened at the outer edge position of the base plate 4, and the number of the third through holes 31 and the fourth through holes 41 are the same, the positions correspond to each other up and down, and the apertures are the same.

[0032] Each third through hole 31 and fourth through hole 41 corresponding to each other in the upper and lower positions form a pair of through holes, a spring is provided between the pair of through holes, a bolt 5 is inserted from the third through hole 31 in the pair of through holes and passes through the fourth through hole 41 in the pair of through holes, the threaded rod portion of the bolt 5 passes through the spring, the diameter of the threaded rod portion of the bolt 5 is smaller than the aperture size of the fourth through hole 41, and the portion of the bolt 5 protruding from the fourth through hole 41 is used to be fixed to the equipment to be isolated from vibration. In the technical solution of the present application, the disc-shaped upper cover 3 is mainly used to bear external loads and transmit the external load to the steel wire rope wound on the disc-shaped steel frame 1. The steel wire rope deforms after being subjected to force, thereby converting mechanical vibration and impact into heat energy and sound energy, reducing the impact of vibration and impact on equipment and workers. Since the bolt 5 cannot be deformed, when fixing the vibration isolator provided by the present application to the equipment to be isolated from vibration, care should be taken not to allow the bolt 5 to interfere with the equipment to be isolated from vibration.

[0033] The following combination Figure 3 The winding method of the wire rope described above is described in detail. Figure 3 As shown, Figure 3 This is a schematic diagram for explaining the winding method of the wire rope in the wire rope variable stiffness vibration isolator provided in the embodiment of this specification. Figure 3 The schematic diagram includes 8 first through holes (the first through holes are located in the inner circle) and 8 second through holes (the second through holes are located in the outer circle). When winding the steel wire rope, the steel wire rope is wound from the bottom of the disc-shaped steel frame 1, that is, the steel wire rope passes through the upper opening of the first through hole marked 1, and then passes through the upper opening of the second through hole marked 2 to pass through the steel frame, and then passes through the lower opening of the second through hole marked 2 to pass through the steel frame, and then passes through the lower opening of the first through hole marked 2 and passes through the corresponding The upper opening passes through the steel frame (the steel wire rope from the lower part of the second through hole labeled 2 to the lower opening section of the first through hole labeled 2 is located at the lower part of the steel frame, and this section of the steel wire rope is tightened), and the cycle continues, eventually passing through the upper opening of the first through hole labeled 8 and entering the upper opening of the second through hole labeled 1, and then passing through the lower opening of the second through hole labeled 1. The passing part is tightened with the steel wire rope of the lower opening part of the first through hole labeled 1, thereby connecting the ends of a steel wire rope.

[0034] When assembling the variable stiffness vibration isolator of the steel wire rope, firstly wind the steel wire rope on the disc-shaped steel frame 1 in the manner described above, starting from the first through hole 101 of the inner circle at the upper end of the frame, and passing through the hole numbered 1 in a clockwise order, and then passing through the hole numbered 2 in the adjacent second through hole 102 of the outer circle, and repeating this cycle until the steel wire rope passes through the last numbered first through hole and then passes through the second through hole numbered 1, thereby forming a plurality of arc-shaped support substructures.

[0035] After the wire rope is wound around the disc-shaped steel frame 1, the disc-shaped steel frame 1 is placed on the base plate 4, which is used to support the disc-shaped steel frame 1. Then, a disc-shaped upper cover 3 is placed on the upper part of the disc-shaped steel frame 1. The disc-shaped upper cover 3 is made of metal material and is used to cover the disc-shaped steel frame 1 to ensure that the upper cover 3 is placed stably and in good contact with the apex of the arc-shaped support substructure. The several third through holes 31 distributed in an annular pattern on the disc-shaped upper cover 3 correspond one to one with the several fourth through holes distributed in an annular pattern on the base plate 4. A spring is placed between each pair of corresponding third through holes 31 and fourth through holes 41. The bolt 5 is inserted from the upper opening of the third through hole 31. The threaded rod portion of the bolt 5 passes through the placed spring and then through the fourth through hole. The protruding portion of the bolt is used to fix to the equipment to be isolated from vibration. During installation, the tightening torque of the bolt should be precisely controlled and tightened in stages in sequence with a torque wrench to ensure a stable connection and uniform stress, and to prevent loosening or over-tightening that may cause structural damage.

[0036] As a further optimization, a fifth through-hole is provided in the center of the disc-shaped steel frame 1. The aperture of the fifth through-hole is larger than that of the first through-hole. The fifth through-hole is used to reduce the weight of the disc-shaped steel frame 1. In the technical solution of this embodiment, the fifth through-hole is located in the center of the disc-shaped steel frame 1 and has a larger aperture than the surrounding first through-holes. Its purpose is to reduce the weight of the central area while ensuring the strength and stability of the frame structure. Based on the principles of material mechanics, reducing the weight of non-critical parts can reduce the structural inertia load and improve the dynamic response characteristics of the vibration isolator.

[0037] To further optimize the solution, the steel wire rope 2 is made of twisted high-strength carbon steel wire.

[0038] In a further optimized solution, nitrile rubber is filled between the bottom plate 4 and the disc-shaped upper cover 3, and the nitrile rubber is used to provide continuous elastic buffering during vibration isolation.

[0039] In order to more clearly illustrate the vibration isolation effect of the wire rope vibration isolator provided by the present invention, the force characteristics of the winding method of the wire rope in the existing wire rope vibration isolator and the winding method of the wire rope in the present application are explained from the perspective of mechanical theory. Figure 8 This is a theoretical diagram of the force characteristics of the wire rope in the traditional wire rope vibration isolator. Figure 9 This is a theoretical diagram of the force characteristics of the wire rope in a wire rope variable stiffness vibration isolator provided in the embodiment of this specification. Figure 8 As shown, the internal force of the existing wire rope vibration isolator is equivalent to a rigid cantilever beam fixed at one end. When a force is applied to the other end, the wire rope bends and produces elastic deformation. Specifically, it can be seen as a number of small vibration isolation units connected in parallel. The connection and fixation between the units of the existing vibration isolator requires a large space, so the load capacity, volume ratio, shape (long strip) and usage selection are greatly limited. Figure 2 From the three-dimensional structural diagram of the steel frame and the steel wire ropes wound on it, it can be seen that the steel wire ropes on the upper part of the steel frame form several arc-shaped support substructures. From the perspective of the result, each arc-shaped support substructure can be regarded as a triangular truss structure, in which the triangular truss structure is a structural model that firmly connects the components in a triangular layout to form an overall structure. Based on the principle of triangle stability, the structure is highly stable and can effectively maintain its shape and mechanical properties when subjected to force. When the vibration isolator is subjected to complex vibration loads, each triangular unit will accurately decompose and transmit the force, and quickly disperse it to the metal cover and steel frame, effectively preventing local damage that may be caused by stress concentration, preventing structural deformation and instability, and ensuring the reliable realization of the vibration isolation function. Compared with traditional structures, this efficient transmission mechanism can give full play to the material mechanical properties of the steel wire rope, greatly improve the ability to operate stably under complex working conditions, and provide continuous and stable vibration isolation support for the equipment.

[0040] At the same time, this structure makes the original wire rope shorter. Only by increasing the external force can a greater torque be generated, increasing the stress of the wire rope in all directions. Therefore, its load can be several times greater than that of the existing vibration isolator. At the same time, due to the use of a completely different connection method (such as Figure 9 ), so the load capacity, volume ratio and shape (truncated cone) have undergone significant changes, that is, strong load capacity, small volume, and truncated cone shape. These all provide more space for use selection, and the load capacity of the same volume can differ by dozens of times.

[0041] At the same time, the utility model also provides another wire rope variable stiffness vibration isolator, Figure 7 This is a schematic diagram of the planar structure of a variable-stiffness wire rope vibration isolator according to another embodiment of this specification. In the figure, 6 represents the tensioning wire rope, 7 represents the wire rope fixing plate, 8 represents the base plate, 9 represents the supporting wire rope, 10 represents the upper cover, and 11 represents nitrile rubber. This structure uses two wire ropes: the supporting wire rope 9 is wrapped around the wire rope fixing plate 7, and the tensioning wire rope 6 is then used to tighten the isolator from the outside. The interior is filled with nitrile rubber 11.

[0042] In the description of this embodiment, terms such as "upper," "lower," and "right" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A wire rope variable stiffness vibration isolator, characterized in that: include: A disc-shaped steel frame, wherein the upper end of the disc-shaped steel frame is provided with a plurality of first through holes evenly arranged in a ring shape and a plurality of second through holes evenly arranged in a ring shape, the number of the first through holes and the number of the second through holes are both N; wherein the first through holes are located in the inner circle of the second through holes; wherein the plurality of first through holes are numbered in sequence in a clockwise direction, the plurality of first through holes are numbered in sequence from number 1 in a clockwise direction, and the plurality of second through holes are numbered in sequence from number 1 in a clockwise direction, and the plurality of first through holes are numbered in sequence from number 1 in the disc-shaped steel frame. A steel wire rope is passed through a first through-hole numbered 1 among the plurality of first through-holes along a predetermined path; wherein the steel wire rope exits from a first through-hole numbered n among the plurality of first through-holes and then enters from a second through-hole numbered n+1 among the plurality of second through-holes, where n is less than or equal to N-1; wherein the steel wire rope exits from a first through-hole numbered N among the plurality of first through-holes and then enters from a second through-hole numbered 1 among the plurality of second through-holes, thereby forming a plurality of arc-shaped steel wire rope support substructures; wherein the steel wire rope portion located at the lower portion of the disc-shaped steel frame is tightened; A disc-shaped upper cover is flexibly provided on the upper part of the disc-shaped steel frame. The disc-shaped upper cover is used to cover the disc-shaped steel frame. The disc-shaped upper cover is made of metal material. A plurality of annular third through holes are opened at the outer edge of the disc-shaped upper cover. A bottom plate is flexibly provided at the lower portion of the disc-shaped steel frame. The bottom plate is made of a metal material and is used to support the disc-shaped steel frame. A plurality of fourth through holes are formed at the outer edge of the bottom plate. The third through holes and the fourth through holes are the same in number, located in corresponding positions, and have the same aperture. Each third through hole and fourth through hole corresponding to each other in the upper and lower positions form a pair of through holes, a spring is arranged between the pair of through holes, a bolt passing through the fourth through hole in the pair of through holes is inserted from the third through hole in the pair of through holes, the threaded rod portion of the bolt passes through the spring, the diameter of the threaded rod portion of the bolt is smaller than the aperture size of the fourth through hole, and the portion of the bolt protruding from the fourth through hole is used to be fixed to the equipment to be vibration isolated.

2. The wire rope variable stiffness vibration isolator according to claim 1, characterized in that: A fifth through hole is provided at the center of the disc-shaped steel frame. The aperture of the fifth through hole is larger than the aperture of the first through hole. The fifth through hole is used to reduce the weight of the disc-shaped steel frame.

3. The steel wire rope variable stiffness vibration isolator according to claim 1, characterized in that: The steel wire rope is made of high-strength carbon steel wire.

4. The steel wire rope variable stiffness vibration isolator according to claim 1, characterized in that: The space between the bottom plate and the disc-shaped upper cover is filled with nitrile rubber, which is used to provide continuous elastic buffering during vibration isolation.

Images