CN214945970U - A split two-way low frequency passive shock absorber - Google Patents
A split two-way low frequency passive shock absorber Download PDFInfo
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- CN214945970U CN214945970U CN202120360263.9U CN202120360263U CN214945970U CN 214945970 U CN214945970 U CN 214945970U CN 202120360263 U CN202120360263 U CN 202120360263U CN 214945970 U CN214945970 U CN 214945970U
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Abstract
本实用新型公开了一种分体式双向低频被动减振器，利用波纹弹簧与低刚度金属橡胶实现低频隔振，采用了横向减振与纵向减振的分体式结构设计，可以同时实现横向与纵向的减振需求，通过加装金属橡胶缓冲元件，满足了冲击工况下的缓冲需求。纵向减振结构与横向减振结构分开后可单独作为单向减振器使用，设计灵活，应用广泛，能满足不同的被减振物的结构形式以及减振需求。
The utility model discloses a split-type two-way low-frequency passive shock absorber, which utilizes a corrugated spring and low-rigidity metal rubber to realize low-frequency vibration isolation, adopts a split-type structure design of lateral vibration damping and longitudinal vibration damping, and can realize lateral and longitudinal vibration simultaneously. To meet the shock absorption requirements, the metal rubber buffer elements are installed to meet the buffer requirements under impact conditions. The longitudinal vibration damping structure and the transverse vibration damping structure can be used independently as a one-way damper after being separated. The design is flexible and the application is wide, which can meet the structural forms and vibration damping requirements of different damped objects.
Description
Technical Field
The utility model belongs to the shock absorber field, concretely relates to passive shock absorber of split type two-way low frequency.
Background
The violent vibration generated when the machine equipment is operated can not only cause the damage of the structure or components of the machine, the shortening of the service life, the reduction of the efficiency and other adverse effects, but also affect the surrounding precision instruments, thereby causing the abnormal work or reducing the sensitivity and the precision of the precision instruments. The noise generated by the vibration is also a great hazard to human health. Shock absorbers are a major component for preventing vibration hazards and have many applications in road transport, aircraft stability control, machining, and the like. The vibration damper can be divided into a passive type, a semi-active type and an active type according to a control method, wherein the passive type vibration damper is generally used at present due to the fact that the structure is relatively simple, the installation is convenient, and the passive type vibration damper is easy to integrate into mechanical equipment. The passive vibration absorber is arranged between the vibration source and the object to be damped, so that the object to be damped is not in direct contact with the vibration source, vibration is transmitted to the object to be damped through the vibration absorber, and the relative vibration displacement of the object to be damped is reduced by the vibration absorber through a rigidity adjusting and damping dissipating method, so that the object to be damped is kept stable. The traditional low-frequency passive damper only has a damping function, and a buffer device is required to be configured independently when the composite working condition of vibration and impact is met, namely a buffer and a damper are required to be configured.
The existing low-frequency vibration absorber generally performs vibration attenuation aiming at a single direction, namely, transverse vibration attenuation or longitudinal vibration attenuation is realized, and when the existing low-frequency vibration absorber faces transverse and longitudinal compound vibration, a plurality of vibration absorbers are required to be configured for simultaneous use; in the existing design scheme, the natural frequency of the shock absorber is mainly reduced by adopting the low-rigidity shock absorption element, but the bearing capacity of the low-rigidity shock absorption element is low, and the shock absorber can be damaged when accidental impact occurs. Therefore, a composite passive damper needs to be designed, a buffering element is added on the basis of realizing bidirectional damping, and the defects in the existing design are overcome.
Disclosure of Invention
The utility model discloses a passive shock absorber of split type two-way low frequency can realize the low frequency damping and the buffering of equidirectional simultaneously, utilizes ripple spring as vertical damping component, just utilizes the end cover to apply predeformation's method through the symmetry installation, guarantees that tensile deformation can not appear or drop with the sliding shaft in the ripple spring of vibration in-process. The ball roller platform is used for realizing the transverse movement of the vibration damper, and the metal rubber pad with lower relative density is used as a vibration damping element for realizing the transverse low-frequency vibration isolation function. Under the action of the impact working condition, the metal rubber pad with higher relative density is adopted as a buffer element, so that the buffer effect is ensured, and the shock absorber is prevented from being damaged by impact.
A split type bidirectional low-frequency passive shock absorber comprises a transverse shock absorbing structure placed on a plane; the annular buffer cushion is fixed at the groove in the transverse vibration damping structure; the longitudinal vibration damping structure is connected with the upper surface of the transverse vibration damping structure; circular buffer pads fixed at the upper end and the lower end in the longitudinal vibration damping structure; and the vibration damping object connecting port is arranged on the upper end surface of the longitudinal vibration damping structure.
Preferably, the annular cushion is made of metal rubber.
Preferably, the circular cushion is made of metal rubber.
Preferably, the upper part and the lower part of the split type bidirectional low-frequency passive shock absorber are in threaded connection through a connecting shaft.
Preferably, the longitudinal vibration damping structure includes: the longitudinal vibration damping base is in contact with the upper surface of the transverse vibration damping structure; a wave spring inserted into and mounted on the protrusion portion of the longitudinal vibration-damping base; a sliding shaft which is arranged at the upper end of the corrugated spring and extends out of the longitudinal vibration damping base; a corrugated spring inserted into the sliding shaft and near the longitudinal vibration damping base; a pre-tightening end cover 4 which covers the upper surface of the longitudinal vibration-damping base and is in threaded connection through a pre-tightening screw; and cushion pad fixing screws for fixing the round cushion pad are respectively fixed on the lower surface of the pre-tightening end cover and in the longitudinal vibration reduction base.
Preferably, the lateral vibration damping structure includes: the upper ball rolling disc and the lower ball rolling disc are respectively arranged at the upper part and the lower part of the connecting shaft, and the annular buffer cushion is fixed at the inner side grooves of the upper ball rolling disc and the lower ball rolling disc; rolling balls placed in corresponding circular grooves of the upper ball rolling disc and the lower ball rolling disc; the platform connecting screw is used for connecting the upper ball rolling disc and the lower ball rolling disc; the upper ball rolling disc is provided with a low-frequency vibration damping pad, the low-frequency vibration damping pad is installed at the contact position of the upper ball rolling disc and the connecting shaft through a fixing ring and a vibration damping pad fixing screw, and a protruding part at the upper end of the connecting shaft is inserted into the low-frequency vibration damping pad.
Preferably, the low frequency damping pad is made of metal rubber.
The utility model discloses a passive shock absorber of split type two-way low frequency has realized horizontal and fore-and-aft two-way damping demand, has satisfied the buffering demand under the impact condition simultaneously, has realized following beneficial effect:
(1) the split type structural design of transverse vibration reduction and longitudinal vibration reduction is adopted, so that the requirements of transverse vibration reduction and longitudinal vibration reduction can be met simultaneously;
(2) a metal rubber buffer element is additionally arranged, so that the buffer requirement under the impact working condition is met;
(3) the longitudinal vibration damping structure and the transverse vibration damping structure can be independently used as a one-way vibration damper after being separated, and the structure is flexible and has strong applicability.
Drawings
FIG. 1 is a front view of a split type bidirectional low-frequency passive damper according to a first embodiment;
FIG. 2 is a sectional view of a split type bidirectional low-frequency passive damper according to a first embodiment;
FIG. 3 is a top view of the split type bidirectional low frequency passive damper according to the first embodiment;
FIG. 4 is a schematic view of a longitudinal low-frequency passive damping mechanism according to the first embodiment;
fig. 5 is a schematic view of a lateral low-frequency passive damping mechanism according to the first embodiment.
The attached drawings are as follows:
1-longitudinal vibration-damping structure, 2-transverse vibration-damping structure, A-vibration-damped object connecting port, B-base connecting port, C-connecting shaft connecting port, 3-sliding shaft, 4-pre-tightening end cap, 5-pre-tightening screw, 6-upper ball platform, 7-platform connecting screw, D-structure section position, 8-round buffer pad, 9-buffer pad fixing screw, E-rolling disc connecting port, 10-annular buffer pad, 11-rolling ball, F-base connecting port, 12-lower ball platform, 13-connecting shaft, 14-fixing ring, 15-vibration-damping pad fixing screw, 16-low-frequency vibration-damping pad, 17-structure connecting screw, 18-1, 18-2-ripple spring, 19-longitudinal vibration damping base.
Detailed Description
The technical solution of the present invention will be further described in detail with reference to the accompanying drawings and the detailed description. It is obvious that the described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the claimed scope of the present invention.
Example one
The embodiment of the application discloses a split type bidirectional low-frequency passive damper, as shown in fig. 1, which comprises a transverse damping structure 2 placed on a plane; an annular cushion pad 10 fixed at a groove inside the transverse vibration damping structure 2; the longitudinal vibration damping structure 1 is connected with the upper surface of the transverse vibration damping structure 2; circular cushions 8 fixed at the upper and lower ends inside the longitudinal vibration damping structure 1; and a connection port A for the object to be damped, which is arranged on the upper end surface of the longitudinal damping structure 1.
Fig. 2 shows a sectional structure of a split type bidirectional low-frequency passive damper, which includes a sectional structure of a longitudinal damping structure 1 and a sectional structure of a transverse damping structure 2, wherein the longitudinal damping structure 1 and the transverse damping structure 2 are in threaded connection through a structural connection screw 17.
FIG. 3 illustrates a top view of a split bi-directional low frequency passive damper, wherein structural section D shows the sectional position of the structural section of FIG. 3.
After the longitudinal vibration reduction structure 1 and the transverse vibration reduction structure 2 are installed, a certain gap exists between the longitudinal vibration reduction structure and the transverse vibration reduction structure, and the longitudinal vibration reduction structure and the transverse vibration reduction structure do not have friction contact during transverse vibration.
The longitudinal vibration damping structure 1 includes: a longitudinal vibration damping base 19 in contact with the upper surface of the transverse vibration damping structure 1; a bellows spring 18-1 inserted into and mounted on a protruding portion of the longitudinal vibration damping mount 19; a sliding shaft 3 disposed at an upper end of the bellows spring 18-1 and extending from the longitudinal damping mount 19; a bellows spring 18-2 inserted and mounted on the sliding shaft 3 near the longitudinal vibration damping mount 19; a pre-tightening end cover 4 which covers the upper surface of the longitudinal vibration reduction base 19 and is in threaded connection through a pre-tightening screw 5; cushion pad fixing screws 9 for fixing the round cushion pad 8 are respectively fixed on the lower surface of the pre-tightening end cover 4 and in the longitudinal vibration damping base 19; the corrugated springs 18-1 and 18-2 are pre-pressed in the connection process, so that the sliding shaft 3 is always in contact with the corrugated springs 18 in the longitudinal vibration process, and a connecting member is not needed.
As an extension of the embodiment of the present application, the longitudinal vibration damping structure 1 can be used alone, as shown in fig. 4, and its use method is as follows:
(1) the vibration-damping object connecting port A is in threaded connection with a vibration-damping object;
(2) under the longitudinal low-frequency vibration, a base connecting port B is in threaded connection with the base;
(3) the sliding shaft 3 drives the corrugated springs 18-1 and 18-2 to vibrate, and the corrugated springs 18-1 and 18-2 attenuate low-frequency vibration due to the negative stiffness characteristic; sliding shaft 3 contacts with circular blotter 8 under the impact, and circular blotter 8 prevents the rigid collision under the impact load effect.
The lateral vibration damping structure 2 includes: an upper ball rolling disc 6 and a lower ball rolling disc 12 which are respectively arranged at the upper part and the lower part of a connecting shaft 13, and an annular buffer cushion 10 is fixed at the inner side grooves of the upper ball rolling disc 6 and the lower ball rolling disc 12; rolling balls 11 placed in corresponding circular grooves of the upper ball rolling disc 6 and the lower ball rolling disc 12; a platform connecting screw 7 for connecting the upper ball rolling disk 6 and the lower ball rolling disk 12; the upper ball rolling disc 6 is provided with a low-frequency damping pad 16, the low-frequency damping pad 16 is arranged at the contact position of the upper ball rolling disc 6 and the connecting shaft 13 through a fixing ring 14 and a damping pad fixing screw 15, and a protruding part at the upper end of the connecting shaft 13 is inserted into the low-frequency damping pad 16.
As an extension of the embodiment of the present application, the lateral vibration damping structure 2 can be used alone, as shown in fig. 5, and the use method thereof is as follows:
(1) the connecting shaft connecting port C is in threaded connection with an object to be isolated, and the bases are connected through the rolling disc connecting port E or the base connecting port F;
(2) under the action of transverse low-frequency vibration, the connecting shaft 13 drives the low-frequency vibration damping pad 16 to vibrate, and the low-frequency vibration damping pad 16 can play a role in damping the low-frequency vibration;
(3) when the shock absorber is subjected to a lateral impact load, the connecting shaft 13 is in contact with the annular cushion pad 10, and the annular cushion pad 10 prevents a hard collision under an excessive impact load.
The utility model discloses a low frequency damping pad 16, circular blotter 8 and annular blotter 10 are formed by the metal rubber preparation, and metal rubber material compares with traditional organic rubber material and has high temperature resistant, corrosion-resistant, difficult ageing and the longer characteristics of life.
The circular cushion pad 8 and the annular cushion pad 10 with higher rigidity are made of metal rubber with higher relative density, so that the circular cushion pad and the annular cushion pad can bear larger impact acting force and have good buffering performance.
The low-frequency vibration damping pad 16 with lower rigidity is made of metal rubber with lower relative density, so that the natural frequency of the low-frequency vibration damping pad is lower, the low-frequency vibration damping pad has good low-frequency vibration damping performance, and the low-frequency vibration damping pad can bear a certain degree of transverse acting force.
Example two
The embodiment of the application discloses a working method of a split type bidirectional low-frequency passive shock absorber, which comprises the following specific steps:
(1) the split type bidirectional low-frequency passive shock absorber is formed by installation;
(2) connecting the vibration-damped object at the vibration-damped object connecting port A;
(3) the split type bidirectional low-frequency passive shock absorber realizes the functions of longitudinal low-frequency vibration isolation, longitudinal buffering, transverse low-frequency shock absorption and transverse buffering.
In the step (1), the base connecting port B is in threaded connection with the transverse vibration reduction structure 2 through a structural connecting screw 17, and the connecting shaft connecting port C is in threaded connection with the longitudinal vibration reduction structure through the structural connecting screw 17.
In the step (2), the connection mode adopts threaded connection.
In the step (3), the implementation method of the longitudinal low-frequency vibration isolation comprises the following steps: the sliding shaft 3 drives the corrugated springs 18-1 and 18-2 to vibrate, and low-frequency vibration isolation of the vibration absorber in the longitudinal direction is realized due to the negative stiffness characteristic of the corrugated springs.
The implementation method of the longitudinal buffer function comprises the following steps: when the split type bidirectional low-frequency passive shock absorber bears a large longitudinal load, the sliding shaft 3 is in contact with the circular cushion pad 8, so that a longitudinal buffering function is realized.
The method for realizing the transverse low-frequency vibration reduction comprises the following steps: the connecting shaft 13 drives the low-frequency vibration damping pad 16 to vibrate, and the low-frequency vibration damping pad 16 made of a low-density metal rubber pad is used for damping transverse low-frequency vibration.
The implementation method of the transverse buffer function comprises the following steps: when the split type bidirectional low-frequency passive shock absorber bears a large transverse load, the connecting shaft is in contact with the annular cushion pad, and a transverse buffering function is realized.
Claims (7)
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120360263.9U CN214945970U (en) | 2021-02-09 | 2021-02-09 | A split two-way low frequency passive shock absorber |
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| CN202120360263.9U CN214945970U (en) | 2021-02-09 | 2021-02-09 | A split two-way low frequency passive shock absorber |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112833122A (en) * | 2021-02-09 | 2021-05-25 | 北京强度环境研究所 | A split two-way low frequency passive shock absorber |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112833122A (en) * | 2021-02-09 | 2021-05-25 | 北京强度环境研究所 | A split two-way low frequency passive shock absorber |
| CN112833122B (en) * | 2021-02-09 | 2024-10-29 | 北京强度环境研究所 | Split type two-way low frequency passive shock absorber |
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