Non-redundancy type metal rubber shock absorber

Abstract

The invention provides a redundancy-free metal rubber shock absorber. The redundancy-free metal rubber shock absorber comprises a supporting screw rod, a mounting gasket, an upper shell, a lower shell, a metal rubber sealing washer, a protective gasket and a metal rubber elastic element, the upper shell and the lower shell are connected through internal and external threads; the supporting screw is provided with a linear groove, a threaded column, a mounting slope and a supporting plate, one end of the supporting screw penetrates out of a movable hole of the upper shell, and the supporting plate at the other end of the supporting screw is located in a cavity formed by the upper shell and the lower shell; the metal rubber elastic elements penetrate through the supporting screw column body and are symmetrically distributed on the upper side and the lower side of the supporting plate in the axial direction. The protective gasket penetrates through the supporting screw column body and covers the upper surface of the upper metal rubber elastic element. A sealing groove is formed in the upper shell, the metal rubber sealing gasket is embedded and installed in the sealing groove of the upper shell, and an inner hole of the metal rubber sealing gasket is tightly attached to the surface of a column body of the supporting screw rod; the installation gasket penetrates through the supporting screw, and the inner hole inclined face of the installation gasket is tightly attached to the installation inclined face of the supporting screw.

Description

Technical Field

[0001] This invention belongs to the fields of structural design and vibration reduction technology, and specifically relates to a metal-rubber vibration damper without redundant components. Background Technology

[0002] Metal-rubber vibration dampers possess advantages such as resistance to high and low temperatures, mold resistance, salt spray resistance, corrosion resistance, radiation resistance, long shelf life, and non-volatile properties in a vacuum, leading to their widespread application in weaponry, aerospace, and civilian machinery. The internal metal-rubber elastic element of the damper is made of metal wires wound and compressed. However, under prolonged or high-load vibration conditions, the metal wires inside the damper can generate metal shavings and other particles due to mutual compression and friction. These impurities may escape and contaminate precision equipment, especially electronic components, affecting their normal operation and reliability.

[0003] To prevent metal debris from escaping during the operation of metal-rubber vibration dampers, existing technologies often use a metal outer shell to enclose and protect the metal-rubber elastic element. However, practical use shows that this method has limited protective effect and still poses a risk of debris escaping.

[0004] Patent CN107654554A proposes a support-type metal-rubber vibration damper, which incorporates a sealing ring and a folded-back cap structure to prevent debris from falling off due to wear of the metal wire mesh damping pad. However, under high-level impact loads, the folded-back cap is prone to plastic deformation, leading to seal failure. During prolonged vibration, friction occurs between the folded-back cap and the sealing ring, and between the folded-back cap and the outer shell due to relative motion, potentially generating metal powder and causing secondary pollution.

[0005] Another patent, CN104061278A, proposes a metal-rubber damper that uses a bellows for sealing, with one end welded to the outer shell and the other end welded to a flange to form a closed space. However, due to the weak radial compressive strength of the bellows and the very small gap between the outer shell and the spindle, this structure results in the damper having almost no effective damping function in the radial direction, limiting its application.

[0006] This invention proposes a metal-rubber vibration damper without excess material. By optimizing the structure of a support-type vibration damper, a metal-rubber sealing gasket is added, and a sealing groove is designed on the outer shell to embed the gasket, effectively blocking the escape path of metal wear debris and preventing contamination of the vibration damping equipment. This vibration damper has an all-metal structure, possessing not only excellent three-dimensional vibration damping performance but also meeting the requirements for long-term storage and use in harsh environments (such as high and low temperatures, radiation, mold, salt spray, etc.), making it of significant application value in aerospace and other fields. Summary of the Invention

[0007] To address the aforementioned problems, this invention proposes a non-debris-laden metal-rubber vibration damper. It employs a fully enclosed metal shell structure, incorporating a protective gasket and a metal-rubber sealing gasket, forming a double protective barrier to effectively suppress the escape of metal shavings. The metal-rubber sealing gasket is manufactured using metal wire winding, weaving, and pressing processes, and is embedded in a sealing groove on the shell. During operation, the protective gasket acts as the first-level barrier, initially preventing shavings from escaping; the metal-rubber sealing gasket acts as the second layer of protection, effectively blocking the path of excess metal shavings. The metal-rubber sealing gasket remains within the sealing groove, with radial and axial clearances, allowing displacement with the movement of the support screw. This avoids squeezing and friction between the metal-rubber sealing gasket and the mating surface, preventing the generation of excess material and secondary pollution. This type of vibration damper retains the advantages of traditional metal-rubber vibration dampers, such as good environmental adaptability, three-dimensional vibration reduction, and buffering, while also possessing excellent anti-debris escape capabilities, expanding its application range.

[0008] The beneficial effects of this invention are as follows: (1) The present invention provides a structural solution that can effectively suppress the metal shavings from the traditional metal rubber vibration damper during operation, thus expanding its application potential in applications with high cleanliness requirements.

[0009] The beneficial effects are as follows: The non-debris-laden metal-rubber vibration damper proposed in this invention uses a protective gasket and a metal-rubber sealing gasket to form a double barrier protection. In operation, the protective gasket acts as the first-level barrier, initially preventing wear debris from escaping; the metal-rubber sealing gasket, as the second layer of protection, is always within the sealing groove, with radial and axial play, allowing displacement with the movement of the support screw. This avoids compression and friction between the metal-rubber sealing gasket and the mating surface, effectively blocking the path of debris escape. This structure, while retaining the original function of the metal-rubber vibration damper, enhances the debris-prevention function, has a reasonable overall structure, is easy to manufacture, and expands its application areas.

[0010] (2) The shock absorber of the present invention innovatively adopts a sealing gasket made of metal rubber material. The sealing gasket and other structures of the shock absorber are all made of metal, which has good environmental adaptability.

[0011] Its beneficial effects are as follows: This invention combines the sealing performance, stiffness, and damping characteristics of metal rubber materials, maintaining the original advantages of high reliability, strong environmental adaptability, and long storage life of metal rubber vibration dampers, while also providing the advantage of preventing foreign objects from entering. The metal rubber sealing gasket and metal rubber elastic element of this invention are both integrally formed by winding and pressing stainless steel wire springs, ensuring good process consistency. The entire machine is made of all-metal materials, maintaining stable performance in harsh environments such as high and low temperatures, salt spray, and mold, and exhibiting excellent environmental weather resistance. Attached Figure Description

[0012] Figure 1 This is an outline drawing of a metal-rubber vibration damper without any redundant components. Figure 2 This is a full sectional view of the structure of a metal-rubber vibration damper without any redundant components. Figure 3 This is a schematic diagram of the support screw of the present invention; Figure 4 This is a schematic diagram of the upper housing of the present invention; Figure 5 This is a schematic diagram of the lower housing of the present invention; Figure 6 This is a schematic diagram of the metal rubber sealing gasket of the present invention; Figure 7 This is a schematic diagram of the protective gasket of the present invention; in, 1-Support screw; 2-Mounting gasket; 3-Upper housing; 4-Lower housing; 5-Metal rubber sealing gasket; 6-Protective gasket; 7-Metal rubber elastic element; 1-1 One-line groove, 1-2 Support screw threaded post, 1-3 Mounting bevel, 1-4 Support plate; 3-1 Upper housing sealing groove, 3-2 Internal thread, 3-3 Movable hole; 4-1 Lower housing threaded post, 4-2 Lower housing mounting surface, 4-3 Lower housing external thread. Detailed Implementation

[0013] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection claimed by the present invention.

[0014] The present invention provides a metal-rubber vibration damper without excess material, comprising: a support screw 1, a mounting gasket 2, an upper housing 3, a lower housing 4, a protective gasket 6, a metal-rubber sealing washer 5, and two metal-rubber elastic elements 7.

[0015] The upper housing 3 is designed with a sealing groove 3-1, an internal thread 3-2, and a movable hole 3-3. The lower housing is designed with a threaded post 4-1, a mounting surface 4-2, and an external thread 4-3. The upper housing 3 and the lower housing 4 are connected by internal and external threads. Epoxy glue is applied to prevent loosening and form a covering space, which protects the metal rubber elastic element 7 and provides a limiting function.

[0016] The corners and sharp edges of the upper shell 3 and the lower shell 4 are all rounded.

[0017] The support screw 1 is designed with a straight groove 1-1, a threaded post 1-2, an installation bevel 1-3 and a support plate 1-4. One end of the support screw 1 is transmitted from the movable hole 3-3 of the upper shell, and the other end of the support plate 1-4 is located inside the cavity formed by the upper shell 3 and the lower shell 4.

[0018] Two metal-rubber elastic elements 7 pass through the support screw 1 column and are symmetrically distributed on the upper and lower sides of the support plate 1-4 along the axial direction. During operation, the interaction force between the two metal-rubber elastic elements 7 and the support screw 1 causes the metal-rubber elastic elements 7 to deform in the axial and radial directions, and the internal metal wires rub against each other to provide support stiffness and friction damping in the direction of motion.

[0019] The protective gasket 6 is designed as a circular thin sheet structure with an inclined protrusion in the inner hole, which increases the contact area and local structural strength of the pre-supported screw 1. The protective gasket 6 passes through the column of the support screw 1, with the protruding side facing upward, covering the surface of the upper metal-rubber elastic element 7. It can prevent metal wear debris from escaping to a certain extent and protect the metal-rubber element 7.

[0020] The metal rubber sealing gasket 5 is formed by spring-making, winding, and pressing stainless steel wire with a diameter of 0.1mm. Its porosity and stiffness are adjustable, and it has a certain degree of flexibility, which can achieve embedded installation. The metal rubber sealing gasket 5 has small internal pores and staggered distribution between layers, which can effectively prevent metal wear debris from escaping and play a sealing role.

[0021] The metal rubber sealing gasket 5 passes through the column of the support screw 1 and is embedded in the sealing groove 3-1 of the upper housing. The inner hole of the metal rubber sealing gasket 5 is tightly fitted to the surface of the column of the support screw 1.

[0022] The radial space dimension of the upper housing sealing groove 3-1 is designed to be larger than the outer diameter of the metal rubber sealing gasket 5, leaving a radial movement clearance for the metal rubber sealing gasket 5; the inner diameter of the lower housing 4 is larger than the outer diameter of the support plate 1-4 of the support screw 1, leaving a movement clearance for the support plate 1-4; the dimensions of these two movement clearances are consistent, ensuring that during operation, the radial movement space of the metal rubber sealing gasket 5 is consistent with the maximum radial displacement that the support screw 1 can generate, avoiding friction caused by compression of the metal rubber sealing gasket 5.

[0023] The inner hole of the metal rubber sealing gasket 5 first passes through the column of the support screw 1, and then is embedded in the sealing groove 3-1 of the upper housing. The inner hole of the metal rubber sealing gasket 5 is tightly fitted to the surface of the column of the support screw 1. The annular surface of the metal rubber sealing gasket 5 is parallel to the annular surface inside the sealing groove 3-1, and one side of them is in contact with each other.

[0024] The inner hole of the mounting shim 2 passes through the threaded post 1-2 of the support screw 1, and the inclined surface of the inner hole of the mounting shim 2 fits against the mounting inclined surface 1-3 on the support screw 1, increasing the contact area between the vibration damper and the damped equipment.

[0025] The supporting screw 1, mounting gasket 2, upper housing 3, lower housing 4, and protective gasket 6 are made of carbon steel or stainless steel. The metal rubber sealing gasket 5 and metal rubber elastic element 7 are made of stainless steel wire.

[0026] The threaded post 1-2 on the support screw 1 is the installation interface for connecting the vibration damping equipment. The threaded post 1-2 on the support screw 1 passes through the through hole on the equipment mounting flange. The equipment mounting flange and the mounting gasket 2 are fastened together by the lock nut. During installation, the slotted groove 1-1 on the support screw 1 needs to be locked to prevent the support screw 1 from rotating. The threaded post 4-1 on the lower housing 4 is the interface for connecting the mounting base. The 4-2 mounting surface on the lower housing 4 is locked with an adjustable wrench, and the threaded post 4-1 on the lower housing 4 is screwed into the threaded hole on the base.

[0027] Figure 1 , Figure 2 The diagram shows the external shape and cross-sectional view of the metal-rubber vibration damper without redundant components. Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 The outline of each component is shown. This invention provides a metal-rubber vibration damper without redundant components, comprising a support screw 1, a mounting gasket 2, an upper housing 3, a lower housing 4, a metal-rubber sealing gasket 5, a protective gasket 6, and two metal-rubber elastic elements 7. The upper housing 3 and the lower housing 4 are connected by internal and external threads. Epoxy adhesive is applied to prevent loosening and form a covering space. The support plate 1-4 on the support screw 1 is located inside the cavity formed by the upper housing 3 and the lower housing 4. The threaded post 1-2 at the other end passes through the movable hole 3-3 of the upper housing 3. Two metal-rubber elastic elements 7 pass through the post on the support screw 1 and are symmetrically distributed on the upper and lower sides of the support plate 1-4 along the axial direction. The protective gasket 6 passes through the post of the support screw and covers the upper surface of the upper metal-rubber elastic element 7, with the convex side facing upward and away from the metal-rubber elastic element 7. The metal-rubber sealing gasket 5 is embedded in the sealing groove 3-1 of the upper housing, and the inner hole of the metal-rubber sealing gasket 5 is tightly fitted to the surface of the post of the support screw 1. The mounting gasket 2 passes through the support screw, and its inner inclined surface is tightly fitted to the mounting inclined surface 1-3 of the support screw.

[0028] The present invention discloses a metal-rubber vibration damper without excess material. The threaded post 1-2 of the support screw passes through the mounting flange mounting through hole of the equipment to be damped, bringing the mounting flange into contact with the surface of the mounting gasket 2. The mounting flange is then fastened to the mounting gasket 2 by tightening the lock nut. The lower housing mounting surface 4-2 is held in place by an adjustable wrench, and the threaded post 4-1 of the lower housing is screwed into the threaded hole on the mounting base, with anti-loosening measures taken. Thus, the equipment to be damped is mounted on the base using the vibration damper of the present invention.

[0029] During operation, vibration and impact energy is transmitted to the vibration damper of this invention through the base. Interaction forces are generated between the two metal-rubber elastic elements 7 and the supporting screw 1, and between the two metal-rubber elastic elements 7 and the outer shell. The two metal-rubber elastic elements 7 undergo axial and radial deformation under stress, and the internal metal wires rub against each other, providing support stiffness and frictional damping in the direction of motion. After a certain period of operation, the internal metal wires of the metal-rubber elastic elements 7 rub against each other, generating metal shavings. Simultaneously, metal shavings are also generated at the contact surfaces of the metal-rubber elastic elements 7, the lower shell 4, and the supporting screw 1. The protective gasket 6 covers the surface of the upper metal-rubber elastic element 7, initially hindering the outward escape path of the metal shavings, serving as the first layer of barrier. However, during operation, the protective gasket 6 moves with the force of the metal-rubber elastic elements 7 and the supporting screw 1. Under certain operating conditions, an axial gap may occur between the protective gasket 6 and the mating surface of the upper shell 3, leading to metal shaving leakage. At this time, the metal-rubber sealing gasket 5, embedded in the sealing groove 3-1, can serve as a second layer of protection. The inner hole of ring 5 fits tightly against the cylindrical surface of the support screw 1. During operation, when the support screw 1 moves upward or downward, the metal rubber sealing gasket 5 moves upward or downward accordingly, adhering tightly to the upper or lower side of the inner wall of the sealing groove 3-1 along the axial direction, effectively blocking the path of metal wear debris. When the support screw 1 moves radially, the metal rubber sealing gasket 5 moves radially accordingly. The sealing groove 3-1 is designed with a certain amount of movement clearance in both the radial and axial directions, avoiding squeezing and friction between the mating surfaces of the metal rubber sealing gasket 5 and the sealing groove 3-1, and between the metal rubber sealing gasket 5 and the support screw 1, thus preventing the generation of metal wear debris and contamination of the equipment. The double-layer protective barrier of this invention, with the protective gasket 6 and the metal rubber sealing gasket 5 working together, effectively isolates the internal space enclosed by the upper shell 3 and the lower shell 4 from external equipment, achieving the effect of preventing foreign matter from entering.

[0030] The foreign matter-free metal-rubber vibration isolator provided by this invention retains the original advantages of metal-rubber vibration isolators, such as multi-directional vibration damping and buffering functions, good environmental adaptability, and long storage life. Through structural optimization, it adds a foreign matter prevention function, making it particularly suitable for equipment with stringent foreign matter control requirements. This vibration isolator helps improve the structural reliability of the damped equipment under high-frequency impact and random vibration environments. Actual vibration and impact tests have verified that this vibration isolator has a damping effect on high-frequency impacts with a peak value of 8000g (tolerance ±9dB) and random vibrations of 18.5g, with a measured shock isolation efficiency greater than 90% and a vibration damping efficiency greater than 50%. After multiple rounds of random vibration and high-frequency impact tests, no significant metal wear debris was observed to escape. Therefore, this vibration isolator can provide an effective vibration damping and buffering solution for equipment with high environmental adaptability requirements and strict foreign matter control.

[0031] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A metal-rubber vibration damper with no excess material, characterized in that, The system includes a support screw, mounting gasket, upper housing, lower housing, metal-rubber sealing gasket, protective gasket, and metal-rubber elastic element. The upper and lower housings are connected by internal and external threads. The support screw is designed with a slotted groove, threaded post, mounting bevel, and support plate. One end of the support screw passes through the movable hole in the upper housing, and the other end of the support plate is located inside the cavity formed by the upper and lower housings. The metal-rubber elastic element passes through the support screw post and is symmetrically distributed on the upper and lower sides of the support plate along the axial direction. The protective gasket passes through the support screw post and covers the upper surface of the upper metal-rubber elastic element. The upper housing has a sealing groove, and the metal-rubber sealing gasket is embedded in the sealing groove of the upper housing, with the inner hole of the metal-rubber sealing gasket tightly fitting the surface of the support screw post. The mounting gasket passes through the support screw, and its inner bevel tightly fits the mounting bevel of the support screw. During operation, the support screw threaded post passes through the mounting flange mounting through hole of the vibration damping equipment, bringing the mounting flange into contact with the mounting gasket surface. The mounting flange is then tightened onto the mounting gasket by locking the lock nut. The lower housing threaded post is then screwed into the threaded hole on the mounting base by using an adjustable wrench to hold the lower housing mounting surface. Vibration and impact energy is transmitted to the vibration damper of this invention through the base. Interaction forces are generated between the metal-rubber elastic element and the support screw, and between the metal-rubber elastic element and the outer shell. After being subjected to force, the metal-rubber elastic element undergoes axial and radial deformation. After working for a certain period of time, the metal wires inside the metal-rubber elastic element rub against each other, generating metal shavings. At the same time, metal shavings are also generated at the contact surfaces of the metal-rubber elastic element, the lower shell, and the support screw. The protective gasket covers the surface of the upper metal-rubber elastic element, initially preventing the metal shavings from escaping outward. However, during operation, the protective gasket will move with the force of the metal-rubber elastic element and the support screw, and an axial gap may be generated between the protective gasket and the mating surface of the upper shell, leading to leakage of metal shavings. At this point, the embedded metal-rubber sealing gasket in the sealing groove serves as a second layer of protection. The inner hole of the metal-rubber sealing gasket tightly fits the cylindrical surface of the support screw. During operation, when the support screw moves upward or downward, the metal-rubber sealing gasket will move upward or downward accordingly, tightly adhering to the upper or lower side of the inner wall of the sealing groove along the axial direction, effectively blocking the path of metal wear debris. When the support screw moves radially, the metal-rubber sealing gasket will move radially accordingly, preventing the generation of metal wear debris.

2. The metal-rubber vibration damper without excess material according to claim 1, characterized in that, The protective pad is a circular thin sheet structure with an inclined protrusion in the inner hole. When the protective pad passes through the support screw column, the protruding side faces upward.

3. The metal-rubber vibration damper without excess material according to claim 1, characterized in that, The metal rubber sealing gasket is formed by spring-making, winding, and pressing stainless steel wire with a diameter of 0.1mm.

4. The metal-rubber vibration damper without excess material according to claim 1, characterized in that, The radial space dimension of the sealing groove is larger than the outer diameter of the metal rubber sealing gasket, allowing for radial movement clearance of the metal rubber sealing gasket; the inner diameter of the lower housing is larger than the outer diameter of the support plate of the support screw, allowing for movement clearance of the support plate; the dimensions of these two movement clearances are consistent.

5. A metal-rubber vibration damper without excess material according to claim 1, characterized in that, The annular surface of the metal-rubber sealing gasket is parallel to the annular surface inside the sealing groove.

6. A metal-rubber vibration damper without excess material according to claim 1, characterized in that, The inclined surface of the inner hole of the mounting gasket fits into the inclined surface of the mounting screw.

7. A metal-rubber vibration damper without excess material according to claim 1, characterized in that, The supporting screw, mounting gasket, upper housing, lower housing, and protective gasket are made of carbon steel or stainless steel, while the metal rubber sealing gasket and metal rubber elastic element are made of stainless steel wire.

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