Rubber damper with presettable stiffness at early stage

Abstract

The invention discloses a rubber damper with presettable stiffness at the early stage. The rubber damper with presettable stiffness at the early stage is characterized in that a guide sleeve is also internally provided with a counter pressure device, and the counter pressure device comprises two groups of prepressing wire ropes having the number being at least three, and two floating platens, wherein the two groups of prepressing wire ropes are symmetrically distributed in the annular space between a rubber vibration isolation cushion and the guide sleeve around the axis of the guide sleeve in a straight line status, one end of each group of the prepressing wire ropes is fixed on the floating platen adjacent to a second end cover, the other end of each group of the prepressing wire ropes penetrates through the floating platen adjacent to a drive component to be fixed on the drive component, one end of each of the other group of the prepressing wire ropes is fixed on the floating platen adjacent to the drive component, the other end of each of the other group of the prepressing wire ropes penetrates through the floating platen adjacent to the second end cover to be fixed on the second end cover, and the two tensioned groups of prepressing wire ropes make the rubber vibration isolation cushion to be always clamped between the two floating platens.

Description

technical field [0001] The invention relates to a shock absorbing device, in particular to a damper using a rubber shock-absorbing pad. Background technique [0002] Rubber shock-isolating pad is a kind of shock-isolating device with rubber as the deformation element. Due to the advantages of low cost, strong bearing capacity and low natural vibration frequency, rubber shock-isolating pad is widely used in heavy-duty occasions such as buildings and bridges. [0003] The strong bearing capacity of the rubber shock-isolating pad is mainly reflected in the compressive capacity, while the tensile capacity is often poor. Under the action of high tensile load, the rubber shock-isolating pad is easy to be torn, precisely because of the weak tensile capacity. Defects lead to certain restrictions on the application of rubber shock-absorbing pads in the field of shock-isolation technology. [0004] The invention patent application with the publication number CN101769015A discloses a ...

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Problems solved by technology

[0003] The strong bearing capacity of the rubber shock-isolating pad is mainly reflected in the compressive capacity, while the tensile capacity is often poor. Under the action of high tensile load, the rubber shock-isolating pad is easy to be torn, precisely because of the weak tensile capacity. Defects lead to certain restrictions on the application of rubber shock-isolating pads in the field of shock-isolation technology

[0004] The invention patent application with the publication number CN101769015A discloses a "Laminated Rubber Shock Isolation Bearing Tensile Mechanism", which includes an upper connecting seat, a lower connecting seat and a laminated rubber clamped between the upper and lower connecting seats. The shock isolation support, the upper connection seat is provided with an "L" shaped upper reaction force arm, the lower connection seat is provided with an inverted "L" shaped lower reaction force arm, and the "L" shaped upper reaction force arm Between the reaction force arm and the horizontal lateral side of the inverted "L"-shaped lower reaction force arm, there is a laminated rubber shock-isolation support clamped by the two in reverse; when the tensile structure is compressed, The pressure is borne by the shock-isolation support clamped between the upper and lower connecting seats; when the tensile structure is pulled, the tension is supported by the "L"-shaped upper reaction force arm and the inverted "L"-shaped lower reaction force arm. The force arm is converted into the pressure on the seismic isolation bearing clamped between the two directions; although this makes the structure have tensile capacity, it still has the following disadvantages: (1) the isolation bearings are divided by different isolation bearings. Bear bi-directional loads, so at least two laminated rubber seismic isolation bearings are required, which not only costs more, but also increases the volume of the seismic structure; (2) When a seismic isolation bearing is compressed, there must be a seismic isolation bearing The bearing is under tension, and the seismic isolation bearing under tension also has the risk of tearing; (3) It is difficult to ensure that the characteristics of the two isolation bearings are the same in technology, so the isolation effect is different in different directions of force

Since the deformation element of the rubber shock absorber is rubber, the above three means of changing the effective working length of the spring are obviously not suitable for the rubber shock absorber; Can only compress energy dissipation and vibration reduction, not stretch energy dissipation and vibration reduction

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