CN209146211U - A kind of multistable eccentric clamp formula axial direction isolation mounting - Google Patents

Abstract

The utility model proposes a kind of multistable eccentric clamp formula axial direction isolation mountings, the inside energy consumption unit being made up of the eccentric clamp, the nested springs double-layer structure that are separated by with middle connecting plate, it is assemblied in the inside and outside sleeve being engaged with punching two ends cover board and briquetting cover board, i.e. external constraint unit.Main carrying and dissipative member of the eccentric clamp as device, there is stable high-bearing capacity under static load, static high rigidity-dynamic Low rigidity under multistable conversion is realized by the auxiliary of the variation of eccentric end boundary condition and nested springs under dynamic load, it is effectively isolated middle low-frequency vibration, the bearing capacity and energy dissipation amount of device can be increased substantially in combination with double-layer structure configuration, finally the alternate compression of different cover boards realizes the double energy consumption in original basis under a tension and compression cyclic loading by external constraint unit.The utility model has the advantage of static high-bearing capacity-dynamic highly energy-consuming, can be effectively isolated middle low-frequency vibration, improves safety of structure.

Description

A kind of multistable eccentric clamp formula axial direction isolation mounting

Technical field

The utility model relates to vibration absorber design fields, and in particular to multistable eccentric clamp formula axial direction isolation mounting.

Background technique

Oscillation phenomenon is widely present in fields such as civil engineering, Marine engineering and ocean engineerings, due to a variety of excitation sets Coupling, cause wide band vibratory response, wherein low-frequency vibration is easily propagated in engineering structure, influence structure safety While endanger equipment precision and the physical and mental health of personnel, therefore it is significant for the efficient vibration isolation technique of middle low-frequency vibration.

Currently used isolation mounting is mainly based upon linear vibration absorbing theory, i.e., is mentioned by reducing the rigidity of isolation mounting High damping efficiency, such as rubber pad, steel spring.Isolation mounting rigidity is reduced merely and is then faced if low-frequency vibration in isolation The problem of bearing capacity lacks, causes more serious equipment or even integrally-built safety issue.In recent years, nonlinear vibration reduction System is more and more more paid attention to, and such shock absorber is by special structure design or material self-characteristic, in vibration lotus The nonlinear characteristic that rigidity or damping are shown under load reduces instantaneous intrinsic frequency, is effectively isolated middle low-frequency vibration.It is existing non- Linear vibration dampers are the multistable isolation mounting that linear Stiffness is realized by special structure design mostly, as pendulum structure, Arrange lateral Negative stiffness spring and electromagnetism isolation mounting etc..There is energy dissipation in application process not in multistable isolation mounting The defects of good, damping efficiency is low, while the rigidity of viscoplasticity isolation mounting is weaker, Lack of support, and practicability is short of.

Utility model content

There are high-bearing capacities and high energy dissipation can not and deposit drawback for existing multistable isolation mounting for the utility model It is proposed a kind of multistable eccentric clamp formula axial direction isolation mounting.

The utility model, which is that the following technical solution is employed, to be realized:

A kind of multistable eccentric clamp formula axial direction isolation mounting is arranged in isolated subject and is isolated between object, including External constraint unit and internal energy consumption unit, the internal energy consumption unit include: eccentric clamp, pneumatic spring, complex spring, on Connecting plate, middle connecting plate, lower connecting plate composition, plate benchmark is connected as in and is divided into axial upper layer and lower layer, every layer of structure includes Two eccentric clamps being arranged oppositely and mutually nested pneumatic spring and complex spring, between assembly and each connecting plate；It is described External constraint unit include: outer sleeve and inner sleeve, the inner sleeve top is equipped with inner sleeve and punches cover board, and bottom end is equipped with interior Sleeve briquetting cover board, the outer sleeve top be equipped with outer sleeve briquetting cover board, bottom end be equipped with outer sleeve punch cover board, two sleeves with The mode that briquetting cover board and punching cover board are engaged completes the coaxial assembly of inner and outer sleeves, and two end pressure blocks are each passed through punching cover board Hole be tightly attached to the upper and lower connecting plate of internal energy consumption unit, when device is pressurized, it is direct that two briquettings partially pass through punching cover board Compression be vertically connected with plate, if when device tension, the punching cover board of inside and outside sleeve directly compresses up and down plate in succession so that device no matter The compression of energy consumption unit inside being realized under tension and compression load.

Further, it is set on the inner wall of the inner sleeve there are two vertical rails, the middle interconnecting piece lateral wall is equipped with With the sliding shoe of sliding rail cooperation.

Further, the eccentric clamp includes the eccentric lobe of mainboard body and upper and lower end parts, and each connecting plate is equipped with rotation Guide groove, eccentric lobe are caught in the pivot guide slot of each connecting plate.

Further, the both ends of the pneumatic spring are connected by universal joint with each connecting plate, pneumatic spring device not By tensioning state is in when external force, pretension is provided for eccentric clamp, the eccentric end of eccentric clamp is made tightly to be caught in rotation Guide groove, tensioning state tends to mitigate after compression.

Further, the outer sleeve, inner sleeve, eccentric clamp, pneumatic spring, universal joint, upper junction plate, lower connecting plate Material with middle connecting plate is steel, and complex spring is steel and rubber composite material.

Further, the compound spring rate is 10~20 times of pneumatic spring rigidity.

Further, the central axis of the installation site and inside and outside sleeve of the pneumatic spring and complex spring coincides.

Further, the contact surface of the pivot guide slot of the connecting plate and eccentric clamp is frosting.

When the utility model is used, the briquetting cover board of outer sleeve and inner sleeve respectively with slider and be isolated body Xiang Gu Fixed, what no matter inside and outside sleeve was subject to is to draw load or pressure load, the inside oscillation damping and energy dissipating unit of isolation mounting be in always by Pressure condition.When isolation mounting is not at stress, pneumatic spring is in the state tensed, and eccentric clamp is made to keep pre-bending Song, and complex spring is then in the raw.If outer sleeve and inner sleeve are pressurized, it is direct that two briquettings partially pass through punching cover board Compression is vertically connected with plate, if outer sleeve is to inner sleeve tension, the punching cover board of inside and outside sleeve directly compresses up and down plate in succession.With The increase of compressive load being subject to, eccentric clamp occur elastic buckling, bearing capacity decline, pneumatic spring by tensioning state gradually Gradually mitigate, and complex spring then starts to be compressed, and assists eccentric clamp pressure-bearing；It is quiet since eccentric clamp is made of steel construction There is high rigidity when state；In loading procedure, when axial compressive force reaches critical value, it is fixed curved that both ends occur for eccentric clamp compression Song, then due to the effect of curved guide slot, the boundary condition of the eccentric lobe up and down of eccentric clamp is changed into both ends simply-support Bending, and the axis critical force of the mode be less than the former, therefore beam mode conversion while along with axial force mutation, There is linear Stiffness in vibrational system, so that the variation relation of axial displacement and load has hysteresis characteristic, realizes vibrational energy Dissipation.

The conversion of a variety of elastic buckling modes occurs under being pressurized by eccentric clamp for the utility model isolation mounting, in nesting Under the auxiliary of spring and external constraint unit, realizes static high rigidity and dynamic Low rigidity, the vibration of isolated subject is effectively reduced Response solves the problems, such as that static stability is weak in the prior art and energy dissipation is insufficient.

Detailed description of the invention

Fig. 1 is the utility model embodiment isolation mounting external constraint unit a quarter cross-sectional view；

Fig. 2 is the cell schematics that consume energy inside the utility model embodiment isolation mounting；

Fig. 3 is the isometric sectional view of the utility model embodiment isolation mounting；

Fig. 4 is the utility model embodiment isolation mounting left view cross-sectional view；

Fig. 5 is the utility model embodiment eccentric clamp structural schematic diagram；

Fig. 6 is curved multistable transition diagram after the utility model embodiment eccentric clamp is pressurized；

Fig. 7 is hysteretic characteristic curve of the utility model embodiment eccentric clamp in a loading-unloading period；

In above each figure: 1, outer sleeve；2, inner sleeve；3, briquetting cover board；4, cover board is punched；5, eccentric clamp, 5-1, partially Cardiac prominence rises；6, pneumatic spring；7, universal joint；8, complex spring；9, upper junction plate；10, middle connecting plate；11, lower connecting plate；12, Sliding shoe；13, sliding rail.

Specific embodiment

The utility model relates to a kind of multistable eccentric clamp formula axial direction isolation mounting with double-layer structure, by Consume energy unit for the inside of eccentric clamp, nested springs double-layer structure composition that connecting plate is separated by, is assemblied in punching two ends cover board In the inside and outside sleeve being engaged with briquetting cover board, i.e. external constraint unit.Main carrying and energy consumption structure of the eccentric clamp as device Part is made of mainboard body and the eccentric lobe for being caught in connecting plate pivot guide slot, has stable high-bearing capacity, dynamic load under static load Realize that static high rigidity-dynamic under multistable conversion is low by the auxiliary of the variation of eccentric end boundary condition and nested springs down Rigidity is effectively isolated middle low-frequency vibration, can increase substantially the bearing capacity of device in combination with double-layer structure configuration and energy consumes Amount is dissipated, finally the alternate compression of different cover boards is realized in original basis under a tension and compression cyclic loading by external constraint unit Double energy consumption.The utility model has the advantage of static high-bearing capacity-dynamic highly energy-consuming, can be effectively isolated middle low-frequency vibration, Improve safety of structure.

To keep purpose, technical method and the advantage of the utility model implementation clearer, below in conjunction with the utility model The attached drawing of embodiment, is further described in more detail the technical solution of the utility model.In the accompanying drawings, identical from beginning to end or Similar label indicates same or similar element or element with the same or similar functions.Described embodiment is this reality With novel a part of the embodiment, instead of all the embodiments.Embodiment below with reference to attached drawing description is exemplary , purport should not be understood as limiting the present invention for explaining the utility model, and those of ordinary skill in the art are not having Every other embodiment obtained under the premise of creative work is made, is fallen within the protection scope of the utility model.Below The embodiments of the present invention are described in detail in conjunction with attached drawing.

In the description of the present invention, it should be understood that term " axial direction ", "center", "horizontal", "vertical", The orientation or relationship of the instructions such as "front", "rear", "left", "right", "upper", "lower", "inner", "outside", "top" and "bottom" are based on attached Orientation or positional relationship shown in figure, only embodiment for ease of description, should not be understood as the limit to scope of protection of the utility model System.

It includes external constraint elements reference Fig. 1 and inside that the utility model embodiment, which provides a kind of vibration isolation anti-impact device, Consume energy elements reference Fig. 2.

As shown in Fig. 2, the composition form of internal energy consumption unit is combined and is connected by eccentric clamp 5 and nested springs in parallel The axial double-layer structure that fishplate bar separately forms, every layer opposite on the basis of the center of middle connecting plate 10 by two eccentric clamps 5 Configuration, with reference to Fig. 5, the 5-1 of eccentric lobe up and down of eccentric clamp 5 is caught in the pivot guide slot of each connecting plate, and every layer of structure is with gas Spring 6 of the moving auxiliary pulling pressing device that is assembled as nested with complex spring 8 is installed side by side with eccentric clamp, and wherein pneumatic spring 6 is The puller system of upper and lower connecting plate and middle connecting plate, is connected with connecting plate by universal joint 7, eccentric clamp 5 is made to be in prebuckling State；Complex spring 8 is pressure apparatus, for assisting the pressure carrying of eccentric clamp in the bent state.Inside energy consumption unit Change the multistable conversion completed under load by 5 upper and lower side boundary condition of eccentric clamp, realizes energy dissipation, while utilizing embedding Sleeve spring device provides pretension and auxiliary pressure-bearing.The double-layer structure of inside energy consumption unit can both provide higher for vibratory equipment Bearing capacity, while providing for vibrational system more times of energy dissipation.

With reference to Fig. 1, external constraint unit includes: outer sleeve 1 and inner sleeve 2, and for outer sleeve 1 upper, inner sleeve 2 is interior under 2 top of sleeve is equipped with inner sleeve and punches cover board 4, and bottom end is equipped with inner sleeve briquetting cover board 3, and 1 top of outer sleeve is equipped with outer sleeve pressure Block cover board 3, bottom end are equipped with outer sleeve and punch cover board 4, and two sleeves are completed inside and outside in such a way that briquetting cover board and punching cover board are engaged The upper and lower connecting plate of internal energy consumption unit is tightly attached in the coaxial assembly of sleeve, the hole that two end pressure blocks are each passed through punching cover board.When When device is pressurized, briquetting cover board 3 is pressed to sleeve inner motion compresses upper junction plate 10 and lower connecting plate 11, inside energy consumption unit Contracting, when device tension, for punching cover board 4 to sleeve inner motion compresses upper junction plate and lower connecting plate, inside energy consumption unit is same Sample is compressed, to realize that inner space compression twice occurs under a tension and compression cyclic loading in external constraint unit.

In the present embodiment, 1 cross section of outer sleeve is rounded square, and the cross section of inner sleeve 2 then only has opposite two Curved surface (as shown in Figure 3), inner sleeve drum outer wall are affixed with outer sleeve inner wall, and the briquetting cover board 3 of outer sleeve is according to the transversal of inner sleeve 2 Facial contour gets through completion assembly.In the present embodiment, the structure of eccentric clamp 5 is the hardened structure with upper and lower end parts eccentric lobe (as shown in Figure 5), end bosses are used to for pressure plate structure provide eccentricity, while increasing connecing for eccentric clamp 5 and each connecting plate Contacting surface product.The opposite pivot guide slot placed and be caught in each connecting plate of two eccentric clamps 5 in single layer energy consumption cellular construction, and It is handled by frosted to increase the stiction of connecting plate and pressing plate, is in addition to this not necessarily to other attachment devices；Matched by this Method is set, the change of boundary condition occurs during elastic buckling for allowable offset pressing plate 5.

In loading procedure, with reference to Fig. 4, when the load of eccentric clamp 5 reaches the fixed curved critical force in both ends, occur by Straight panel state is to the first time regime shift of bending state, and the eccentric end of subsequent eccentric clamp 5 is by intermediate mainboard body elasticity The influence of buckling is completed inertia and is pulled, and bending state becomes the bending of both ends simply-support, completes second of regime shift, conversion process Middle axial rigidity substantially reduces, and directly becomes straight panel state from the bending of both ends simply-support in subsequent uninstall process, realizes third Secondary regime shift (as shown in Figure 6).Nested pneumatic spring 6 and complex spring 8 and eccentric clamp 5 assemble side by side, wherein pneumatic Spring 6 connects each adjacent connecting plate, provides pretension, to reduce the axial direction that first time regime shift occurs for eccentric clamp 5 Displacement, improves damping efficiency, and complex spring 8 is used to assist second of regime shift axial carrying capacity of eccentric clamp 5 significantly Auxiliary pressure-bearing when decline guarantees the stability and safety of isolation mounting, simultaneously because the material property of complex spring itself, Similarly play the role of energy dissipation.Therefore, eccentric clamp 5 a cycle of vibration isolator loading-unloading acting first It is changed into the elastic potential energy of eccentric clamp 5, it is rear to form ysteresis effect by 3 regime shifts, energy dissipation is generated (shown in Fig. 7 Curve winding area be energy dissipation amount), the portion of energy in original elastic potential energy dissipates after release, remainder weight Newly it is converted to the kinetic energy of vibration isolator.Under the collective effect of 5 elastic buckling of eccentric clamp and energy dissipation, by the vibration of vibration isolator Response substantially reduces.Isolation mounting is by the multistable flexural property of eccentric clamp and the high damping characteristic connection of complex spring material It closes and realizes highly energy-consuming.

Since influence of the parameter to its ysteresis effect of internal energy consumption unit is very big, the vibration isolation is being designed for certain vibration isolator When device can suitably modified eccentric clamp 5 dimensional parameters.Wherein, the height of eccentric clamp 5 is by outer sleeve 1 and inner sleeve 2 Height is limited, but the length of its mainboard body and upper and lower end parts protrusion can do phase according to the vibration characteristics of vibration isolator with width The adjustment answered.

Pneumatic spring 6 is towed pneumatic spring, is made of cylinder, piston and piston rod, is in tight shape under natural conditions State tends to mitigate after compression, center of the installation site for middle connecting plate 10, the center overlapping of axles with inner sleeve 2, and passes through ten thousand It is connected to section 7, when device is not by external force load action, pneumatic spring 6 is tensioning state, pretension is provided for eccentric clamp, It is pressurized simultaneously in eccentric clamp 5 and the moment offer cushioning supportive of elastic buckling is provided.

Complex spring 8 is the high rigidity anti pressure devices being combined by steel and rubber, is in hollow cylindrical structure, installation position Set equally with bushing core overlapping of axles；Complex spring 8 have in its natural state with upper junction plate 9 and middle connecting plate 10 it is certain away from From when elastic buckling occurs for eccentric clamp 5, upper junction plate 9 and middle connecting plate 10 are moved downward, and complex spring is pressurized auxiliary partially Heart pressing plate pressure-bearing, while energy dissipation being provided.

It is in horizontality always for connecting plate 10 in guarantee, four sides of middle connecting plate 10 are distinguished by installation sliding block 12 The sliding rail 13 installed with inside and outside sleeve inner wall assembles, and during guaranteeing sleeve axial movement, middle connecting plate 10 is protected always Water holding is flat.The number of certain sliding rail can according to circumstances set two or 4 etc..

The specific manufacturing process of the utility model:

With reference to Fig. 4, consume energy unit for the inside of the multistable eccentric clamp formula axial direction isolation mounting of assembling double-layer structure first: After eccentric clamp 5 and nested pneumatic spring 6 and complex spring 8 are connected in parallel with upper junction plate 9, middle connecting plate 10, lower company Fishplate bar 11 assembles, and the eccentric end up and down of eccentric clamp 5 is caught in the pivot guide slot of each connecting plate, pneumatic spring by universal joint with Each connecting plate is connected, and each layer complex spring 8 is only fixed with middle connecting plate 10 and lower connecting plate 11 respectively, middle 10 surrounding of connecting plate Middle position installation sliding block；

It reassembles external constraint unit: respectively welding outer sleeve 1, inner sleeve 2 and punching cover board 4, inner sleeve punching lid Plate 3 is upward, inside energy consumption unit is packed into inner sleeve 2, outer sleeve punching cover board 3 is assemblied in downwards the outside of inner sleeve 2, makes interior Punching pressing plate of the upper junction plate and lower connecting plate of portion's energy consumption unit respectively with inner sleeve and outer sleeve is affixed, while will be mounted on The sliding shoe of middle 10 surrounding of connecting plate is assembled respectively at the sliding rail of sleeve lining；Briquetting cover board is finally buckled into punching pressing plate, is welded It is connected to the upper and lower ends of isolation mounting.

More than, it is only the preferred embodiment of the utility model, is not the limit for making other forms to the utility model System, any person skilled in the art are changed or are modified as equivalent variations possibly also with the technology contents of the disclosure above Equivalent embodiment be applied to other fields, but it is all without departing from the content of the technical scheme of the utility model, it is practical new according to this The technical spirit of type any simple modification, equivalent variations and remodeling to the above embodiments, still fall within the utility model skill The protection scope of art scheme.

Claims (8)

1. a kind of multistable eccentric clamp formula axial direction isolation mounting is arranged in isolated subject and is isolated between object, feature It is: including external constraint unit and internal energy consumption unit,

The internal energy consumption unit includes: eccentric clamp, pneumatic spring, complex spring, upper junction plate, middle connecting plate, lower connection Plate, is divided into axial upper layer and lower layer on the basis of middle connecting plate, and every layer of structure includes two eccentric clamps being arranged oppositely and phase Mutually nested pneumatic spring and complex spring, are assemblied between each connecting plate；

The external constraint unit includes: outer sleeve and inner sleeve, and the inner sleeve top is equipped with inner sleeve and punches cover board, bottom End is equipped with inner sleeve briquetting cover board, and the outer sleeve top is equipped with outer sleeve briquetting cover board, and bottom end is equipped with outer sleeve and punches cover board, Two sleeves complete the coaxial assembly of inner and outer sleeves in such a way that briquetting cover board and punching cover board are engaged, and two end pressure blocks are each passed through The upper and lower connecting plate of internal energy consumption unit is tightly attached in the hole of punching cover board, and when device is pressurized, two briquettings partially pass through punching Cover board, which directly compresses, is vertically connected with plate, if when device tension, the punching cover board of inside and outside sleeve directly compresses up and down plate in succession, so that Device no matter under tension and compression load realize inside consume energy unit compression.

2. multistable eccentric clamp formula axial direction isolation mounting according to claim 1, which is characterized in that the inner sleeve It is set on inner wall there are two vertical rails, the middle interconnecting piece lateral wall is equipped with the sliding shoe cooperated with the sliding rail.

3. multistable eccentric clamp formula axial direction isolation mounting according to claim 1 or 2, which is characterized in that the bias Pressing plate includes the eccentric lobe of mainboard body and upper and lower end parts, and each connecting plate is equipped with pivot guide slot, and eccentric lobe is caught in each connection The pivot guide slot of plate.

4. multistable eccentric clamp formula axial direction isolation mounting according to claim 3, which is characterized in that the pneumatic spring Both ends be connected with each connecting plate by universal joint, pneumatic spring, in tensioning state, is inclined when device is not by external force Heart pressing plate provides pretension, so that the eccentric end of eccentric clamp is tightly caught in pivot guide slot, tensioning state tends to mitigate after compression.

5. multistable eccentric clamp formula axial direction isolation mounting according to claim 4, which is characterized in that the outer sleeve, Inner sleeve, eccentric clamp, pneumatic spring, universal joint, upper junction plate, lower connecting plate and middle connecting plate material be steel, it is multiple Closing spring is steel and rubber composite material.

6. multistable eccentric clamp formula axial direction isolation mounting according to claim 5, which is characterized in that the complex spring Rigidity is 10~20 times of pneumatic spring rigidity.

7. multistable eccentric clamp formula axial direction isolation mounting according to claim 6, which is characterized in that the pneumatic spring It coincides with the installation site of complex spring and the central axis of inside and outside sleeve.

8. multistable eccentric clamp formula axial direction isolation mounting according to claim 7, which is characterized in that the connecting plate The contact surface of pivot guide slot and eccentric clamp is frosting.