CN-122014780-A - Superfluous metal rubber shock absorber

CN122014780ACN 122014780 ACN122014780 ACN 122014780ACN-122014780-A

Abstract

The invention provides a metal rubber shock absorber without redundant materials, which comprises a supporting screw rod, a mounting gasket, an upper shell, a lower shell, a metal rubber sealing gasket, a protection gasket and a metal rubber elastic element, wherein the upper shell and the lower shell are connected through internal threads and external threads, the supporting screw rod is provided with a straight groove, a threaded column, a mounting inclined plane and a supporting plate, one end of the supporting screw rod penetrates out of a movable hole of the upper shell, the supporting plate at the other end of the supporting screw rod is positioned in a cavity formed by the upper shell and the lower shell, the metal rubber elastic element penetrates through the supporting screw rod column and is axially and symmetrically distributed on the upper side and the lower side of the supporting plate, the protection gasket penetrates through the supporting screw rod column to cover the upper surface of the upper metal rubber elastic element, the upper shell is provided with the sealing groove, the metal rubber sealing gasket is embedded and mounted in the upper shell sealing groove, an inner hole of the metal rubber sealing gasket is tightly attached to the column surface of the supporting screw rod, and the mounting gasket penetrates through the supporting screw rod, and the inner hole inclined plane of the supporting screw rod is tightly attached to the mounting inclined plane.

Inventors

CAO LU
HE ZHIGUO
DUAN XIANGJIAN
ZHANG JIANWEN
LI HAOYU
HAO YANYAN

Assignees

北京强度环境研究所

Dates

Publication Date: 20260512
Application Date: 20260324

Claims (7)

1. The metal rubber shock absorber without the surplus is characterized by comprising a supporting screw, a mounting gasket, an upper shell, a lower shell, a metal rubber sealing gasket, a protection gasket and a metal rubber elastic element; the upper shell is connected with the lower shell through internal and external threads, the supporting screw is provided with a straight-line groove, a threaded column, an installation inclined plane 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 positioned in a cavity formed by the upper shell and the lower shell; When the vibration damper works, the support screw thread column passes through the mounting flange mounting through hole of the vibration damper, the mounting flange is contacted with the surface of the mounting gasket, and the mounting flange is fastened on the mounting gasket through the locking nut; The vibration impact energy is transmitted to the vibration damper through the base, interaction force is generated between the metal rubber elastic element and the supporting screw rod and between the metal rubber elastic element and the outer shell, axial and radial deformation is generated after the metal rubber elastic element is stressed, metal wires inside the metal rubber elastic element are rubbed with each other after a certain period of operation, metal abrasive dust is generated, meanwhile, contact surfaces of the metal rubber elastic element, the lower shell and the supporting screw rod can also generate the metal abrasive dust, a protection gasket covers the surface of the upper side metal rubber elastic element and initially blocks a path for the metal abrasive dust to escape outwards, but the protection gasket can move along with the acting force of the metal rubber elastic element and the supporting screw rod during operation, axial clearance can be generated between the protection gasket and the matching surface of the upper shell, so that the metal abrasive dust leaks, at the moment, an inner hole of the metal rubber sealing gasket embedded in the sealing groove is used as a second layer for protection, the metal rubber sealing gasket can move upwards or downwards along with the cylinder surface of the supporting screw rod when the supporting screw rod moves upwards or downwards, the metal abrasive dust can be blocked from moving upwards or downwards along with the inner wall of the sealing groove along with the axial direction, and excessive abrasive dust can not move along with the radial abrasion dust is generated when the metal abrasive dust is not supported by the metal abrasive dust.
2. The metal rubber vibration damper without surplus according to claim 1, wherein the protection gasket is of a circular sheet structure, an inclined surface bulge is designed in the inner hole, and one side of the bulge surface faces upwards when the protection gasket passes through the supporting screw column body.
3. The non-redundant metal rubber vibration damper according to claim 1, wherein the metal rubber sealing washer is made of stainless steel wire with a diameter of 0.1mm, wound, and compression molded.
4. The superfluous metal rubber shock absorber according to claim 1 is characterized in that the radial space size of the sealing groove is larger than the outer diameter size of the metal rubber sealing gasket, a radial movable gap of the metal rubber sealing gasket is reserved, the diameter size of the inner cavity of the lower shell is larger than the outer diameter size of the supporting plate of the supporting screw rod, a movable gap of the supporting plate is reserved, and the sizes of the two movable gaps are identical.
5. The redundancy-free metal rubber vibration damper of claim 1, wherein the annular surface of the metal rubber sealing gasket is parallel to the annular surface inside the sealing groove.
6. The redundancy-free metal rubber vibration damper of claim 1, wherein the mounting pad bore chamfer is in registry with a mounting chamfer on the support screw.
7. The metal rubber vibration damper without surplus according to claim 1, wherein the supporting screw, the mounting pad, the upper case, the lower case, and the protective pad are made of carbon steel or stainless steel, and the metal rubber gasket and the metal rubber elastic member are made of stainless steel wires.

Description

Superfluous metal rubber shock absorber Technical Field The invention belongs to the technical field of structural design and vibration reduction, and particularly relates to a metal rubber vibration damper without redundant materials. Background The metal rubber shock absorber has the advantages of high and low temperature resistance, mold resistance, salt fog resistance and the like, corrosion resistance, radiation resistance, long storage life, no volatilization in vacuum and the like, and is widely applied to the fields of weapon equipment, aerospace, civil machinery and the like. The metal rubber elastic element in the metal rubber damper is formed by winding and pressing metal wires, but under the condition of long time or large load vibration, metal abrasive dust and other particles can be generated between the metal wires in the metal rubber damper due to mutual extrusion and friction, and the excessive substances can escape and pollute precise equipment, especially electronic components, so that the normal operation and the reliability of the metal rubber elastic element are affected. In order to inhibit the escape of metal abrasive dust generated during the operation of the metal rubber shock absorber, a metal outer shell is often adopted in the prior art to wrap and protect a metal rubber elastic element, but practical use shows that the protection effect of the mode is limited, and the risk of abrasive dust escape still exists. Patent CN107654554a proposes a support type metal rubber damper, which is designed with a seal ring and a turn-back cap structure to prevent the falling of chips generated by abrasion of a wire mesh damper pad. However, under high-magnitude impact load, the folding cap is easy to generate plastic deformation, so that sealing failure is caused, and friction is generated between the folding cap and the sealing ring and between the folding cap and the outer shell body due to relative movement in the long-time vibration process, so that secondary pollution is caused. Another patent CN104061278a proposes a metal rubber damper, which adopts a bellows to realize sealing, one end of which is welded with the housing, and the other end of which is welded with the flange, so as to form a closed space. However, the structure has the defects that the radial compressive strength of the corrugated pipe is weak, the design of a gap between the shell and the mandrel is very small, so that the damper hardly has an effective damping function in the radial direction, and the application occasions are limited. The invention provides a metal rubber shock absorber without redundant substances, which is characterized in that a metal rubber sealing gasket is additionally arranged by optimizing the structure of a support type shock absorber, and a sealing groove is designed on an outer shell body and is embedded into the sealing gasket, so that an escape channel of metal abrasive dust is effectively blocked, and pollution to shock absorbing equipment is avoided. The shock absorber is of an all-metal structure, has good three-way shock absorption and buffering performance, can meet the use requirements of long-term storage and severe environments (such as high and low temperature, irradiation, mould, salt fog and the like), and has important application value in the fields of aerospace and the like. Disclosure of Invention In order to solve the problems, the invention provides a metal rubber shock absorber without redundant materials, which adopts a fully-coated metal shell structure and is designed with a protection gasket and a metal rubber sealing gasket to form a double protection barrier so as to effectively inhibit escape of metal abrasive dust. The metal rubber sealing gasket is made by metal wire winding, braiding and pressing processes and is embedded in a sealing groove on the outer shell. In the working process, the protection gasket serves as a first-stage barrier to primarily block the escape of the abrasive dust, and the metal rubber sealing gasket serves as a second-stage protection to effectively block the escape path of the excessive abrasive dust. The metal rubber sealing gasket is always positioned in the sealing groove, has radial and axial movable gaps, can generate displacement along with the movement of the supporting screw, avoids the extrusion and friction between the metal rubber sealing gasket and the matching surface to generate excessive substances, and does not cause secondary pollution. The shock absorber reserves the advantages of good environmental adaptability, three-way shock absorption and buffering of the traditional metal rubber shock absorber, has a good function of preventing the escape of the redundant substances, and expands the application range of the shock absorber. The beneficial effects of the invention are as follows: (1) The invention provides a structural scheme capable of effectively inhibiting the escape of metal abrasive dust generated in the ope