CN1021245C - Energy damping device - Google Patents
Energy damping device Download PDFInfo
- Publication number
- CN1021245C CN1021245C CN 90107601 CN90107601A CN1021245C CN 1021245 C CN1021245 C CN 1021245C CN 90107601 CN90107601 CN 90107601 CN 90107601 A CN90107601 A CN 90107601A CN 1021245 C CN1021245 C CN 1021245C
- Authority
- CN
- China
- Prior art keywords
- assembly parts
- cylinder
- piston
- friction
- friction assembly
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Fluid-Damping Devices (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The present invention relates to an energy damping device which has a piston cylinder assembly, wherein the piston cylinder assembly has a cylinder and a piston which moves in the cylinder. A pre-loaded double acting spring and a friction assembly are enclosed completely in the cylinder and are coaxially connected with the piston. The spring acts on the friction assembly for forcing the friction assembly to make frictional contact with the inner surface of the cylinder. The friction assembly has at least one wedge-shaped member for contacting the inner surface of the cylinder. The friction assembly also has a plurality of compression rings which are arranged at internals and are overlapped with the wedge-shaped member. The wedge-shaped member is outwards pushed in a radial direction and makes the frictional contact with the inner surface of the cylinder.
Description
The present invention relates generally to energy dissipator, relate in particular to a kind of system that oscillating load, dissipation kinetic energy, control vibration and limit load move that is used to absorb.
Energy dissipator is well-known, is widely used in various uses in various industry.For example, general drag wedge vibration insulating system (friction wedged shock absorbing system) the dissipation vibrational energy of using in the railway industry.
The best example of tradition vibration damping equipment is to be the vibration damper of trade name sale with Hao Daier friction buffer (Houdaille Friction Snubber), cuts down sieve city Hao Daier industrial group by New York cloth and sells.The Hao Daier vibration damper includes socket usually, and pretensioned spring and three fan-shaped boots pieces are housed in it, when operation element moves and the socket inboard make rubbing contact.Pretensioned spring outwards pushes the boots piece, makes it to contact with socket, produces the thermal friction displacement of boots piece on the socket liner.But the friction displacement of boots piece makes boots piece lining and socket rapid wearing.Therefore, traditional vibration damper requires often maintenance and updating component.
Though Hao Daier buffer and other similar conventional apparatus absorb the kinetic energy that the supporting system vibration causes, verified also not exclusively success aspect sizable instantaneous kinetic energy that dissipates.In this respect, the dissipation of vibrational energy only needs the moving element thermal walking to produce moderate surface friction drag, the thermal walking that causes in the Hao Daier buffer such as the boots piece etc.But the dissipation of big instantaneous kinetic energy makes vibration insulating system turn round in unpredictable and disadvantageous mode.The best example of this unfavorable effect is " water hammer effect ", and this is because the rapid start of valve, or when pipeline breaking, be fixed on the pipe that breaks on this class vibration damper move or Wobble effect caused.
US4,481,974 disclose another kind of energy dissipator, valve vibration the carrying out vibration damping that this device produces when being used for driving valve on control valve unit and closing valve.This valve has a stationary valve portion and a moving valve portion, and friction component is housed therebetween.This friction component produces surface friction drag, acts on when driving valve or closing valve in the moving valve portion, and slight braking is carried out in the motion of moving valve portion.Though the vibration damping that this energy dissipator can be satisfied with to small vibration, it can not dissipate big instantaneous kinetic energy.
Once the someone tried to find the solution certainly and the relevant problem of big instantaneous kinetic energy that dissipates, but did not all have the solution of success.One of them way is to increase in the Hao Daier buffer stroke of heat-resistant element or displacement amount the boots piece.Another tentative way is the length that increases spring.Though each way that proposed all may make sizable instantaneous kinetic energy dissipate, all verified can not be successful fully.In this respect, increase the displacement amount of straining element, or increase spring element, all make the overall dimensions of energy dissipator that disadvantageous increase is arranged.Therefore, these can not be entirely satisfactory in some application facet through tentative ways, can not use on limited position, on the position of being limited to or space because vibration damper increases.And this tentative way makes manufacture cost that very big increasing be arranged.
Therefore, the utmost point need have a kind of improved energy dissipator of novelty, can be in order to effective dissipation transient vibration energy.Energy dissipator should be able to produce sizable restraint, along suppressing route minimum displacement amount is arranged.Device size should be quite compact, and operating cost is quite low, and installs easily.Also should be able to turn round, in requisition for the minimum maintenance and the renewal of parts in predictable mode.
Device should have modernized widely application facet, and versatility should be arranged, and for example is used for locomotive industry and nuclear-plant.Device should be quite sensitive, and weight is quite little, and compact dimensions is so that the application in do military affairs and the aerospace.
Therefore, main purpose of the present invention provides a kind of improved energy dissipator of novelty, and it can produce sizable restraint, with effective dissipation transient vibration energy, along suppressing route minimum displacement amount is arranged simultaneously.
Another purpose of the present invention provides a kind of improved energy dissipator of novelty, and size is quite little and compact, and manufacturing expense is low and easy for installation.
In brief, above-mentioned and other purpose of the present invention and characteristics can realize by the improved energy dissipator that a kind of novelty is provided.According to the present invention, a kind of energy dissipator that is used to absorb oscillating load and is used to dissipate kinetic energy, described device comprises: a piston cylinder assembly parts, it has a hollow cylinder and a local at least piston that is installed in the described hollow cylinder; The friction assembly parts of a positive action between described cylinder and described piston dissipates and is applied to described cylinder and described piston big load each other vertically in order to produce surface friction drag betwixt; A reloading spring assembly parts that is placed in the described hollow cylinder is used to act on described friction assembly parts, so that produce described surface friction drag between described cylinder and described piston; Described piston has one in radially-protruding expansion section, described friction assembly parts outer position upper edge; And a retainer, with limit described piston and described cylinder freely moving to axial each other with the contacting of described expansion section of described piston; The installation of described piston and described cylinder it can be had nothing to do with described friction assembly parts as freely moving axially each other, thereby during running well, little load can make described piston and described cylinder move to axial; Described friction assembly parts also has a hole of extending vertically, and the installation of convenient described piston and described cylinder can freely move axially it and irrelevant with described friction assembly parts each other; Described spring assembly acts on the described friction assembly parts, be subjected to resistance ground promotion, when described friction assembly parts only is subjected to little loading, can make the relative movement freely and unlikelyly cause big surface friction drag basically of friction assembly parts, when described friction assembly parts only is subjected to big loading, can make described friction assembly parts be subjected to bias voltage and produce big surface friction drag; Described piston cylinder assembly parts has a space, and described space makes described piston during described normal operation, be subjected under the little loading, its with can do before described friction assembly parts contacts limitedly to relatively move freely basically.
In a kind of form of the present invention, energy dissipator has a friction assembly parts and a reloading spring.Therefore, when device bears vibratory shock load and transient dynamic load, generation can change heat energy into, dissipate along the inwall of cylinder.In this respect, spring adds axial force to adjacent external compression circulating application, makes it adjacent wedge with next and closely contacts.Therefore, wedge is pressed by radially outward, makes rubbing contact with the inwall of cylinder.
Similarly, according to the size that applies power, the wedge in the friction assembly parts is urged, and makes rubbing contact with the internal surface of cylinder.
Have an energy dissipator in the another kind of form of the present invention, device has the friction assembly parts of pair of spaced, and is staggered relatively with spring.
The characteristics of another form of the present invention are to have a kind of energy dissipator, wherein have the friction assembly parts of pair of spaced, place with respect to spring, have a pair of retainer, the free travel of limited piston in cylinder body, limit again one of them the friction assembly parts stroke.At a retainer with adjacent be provided with the gap between rubbing by assembly parts, make piston limited free travel in cylinder body.Another form of the present invention, its characteristics wherein have a friction assembly parts and are configured between two double-action reloading springs for a kind of vibration damping device is arranged.
The device of invention is quite little, compact dimensions, and cost is low, and is easy for installation, turns round in predictable mode.Produce bigger restraint along short inhibition route.Device of the present invention is quite sensitive, and weight is quite little, makes it to use in the wide modern purposes of scope.
The above and other purpose of the present invention and characteristics achieve the goal and obtain the mode of characteristics, and of invention itself, in conjunction with the accompanying drawings and consult hereinafter inventing the narration of each embodiment, just can have the most clearly and understand, and accompanying drawing is simply described as follows:
Fig. 1 is the front cross sectional view by a kind of energy dissipator of the present invention's manufacturing, shows pipeline structure of supporting;
Fig. 2 is the amplification view of energy dissipator shown in Figure 1 2-2 along the line;
Fig. 3 is the sectional view by another energy dissipator of the present invention's manufacturing;
Fig. 4 is the sectional view by the another energy dissipator of the present invention's manufacturing;
Fig. 5 is the enlarged side view of the interior compression ring of a device part in the pie graph 1;
Fig. 6 is the amplification decomposition side view of the wedge of a device part in the pie graph 1;
Fig. 7 is the enlarged side view of the external compression ring of a device part in the pie graph 1;
Fig. 8 is the sectional view by the another energy dissipator of the present invention's manufacturing.
Now referring to accompanying drawing, specifically referring to Fig. 1, by the energy dissipator 10 of the present invention's manufacturing, it is fixed on the high pressure pipe system 11 shown in the figure.This installs the vibration of 10 may command, limits its motion when piping 11 breaks, and hereinafter more detailed narration will be arranged.
Device 10 generally comprises a piston cylinder assembly parts 12, and the one end is fixed on inactive substantially rigid support 13, its other end be connected with piping 11 with further supporting it.A preload double-acting spring 16 is installed in the piston cylinder assembly parts 12, acts on vertically on the friction assembly parts 14.
Friction assembly parts 14 generally has one group of essentially identical wedge separately, such as wedge 25 and 26, and their alternate configurations between such as one group of compression ring of compression ring 30,33 and 36.Only, in friction assembly parts 14, be provided with two wedge and three compression rings for for the purpose of illustrating.But those of ordinary skills are easy to understand, and can use wedge and compression ring more than this number in the single device 10.
22 coaxial the linking to each other of piston of friction assembly parts 14 and piston cylinder assembly parts 12, and contact with the inwall or inner circumference edge 21 tight friction of the cylinder 20 of piston cylinder assembly parts 12.So friction assembly parts 14 leans against moving on the inwall 21 of piston cylinder assembly parts 12, produce and suppress frictional force, change the kinetic energy in the system into heat energy, heat energy dissipates by the wall of piston cylinder assembly parts 12.
As shown in Figure 6, wedge 25 generally has a ring part 40, is formed with center hole 50, so that be connected with the compression ring 30 and 33 of a pair of complementary shape simultaneously.Fig. 2 illustrates again, and wedge 25 has the lyriform pore 42 of axial stretching, extension on periphery, and when inwardly being pressed into compression ring 30 and 33 in the center hole 50, wedge 25 can outwards stretch diametrically, makes rubbing contact with the inwall 21 of cylinder 20.So just, available wedge 25 dissipation vibrational energy and instantaneous kinetic energies.In this respect, when absorb can increase the time, make the stretching, extension can regulate of wedge 25, reach with inwall 21 and make rubbing contact more closely, can dissipate more substantial.
During running, device 10 bears vibratory shock load and possible transient dynamic load.Can change heat energy into what produce, along inwall 21 dissipations of cylinder 20.In this respect, when piping 11 bore the power that makes progress, the piston 22 of piston cylinder assembly parts 12 moved up in cylinder 11.So 16 pairs of lower compression rings 36 of reloading spring apply an axial force that makes progress, the structure of lower compression ring 36 is roughly similar to last compression ring 30 shown in Figure 7 with design.
The axial displacement of wedge 25 makes it to contact compression ring 30.The prominent partially surperficial 65A of slope annular of the complementary shape of the surface 76 contact wedge 25 of dashing forward partially of compression ring 33 outwards pushes up it diametrically.Like this, opening 42 is enlarged to periphery, compressing wedge 25 is made rubbing contact with the inwall 21 of cylinder 20.
When device 10 was subjected to a downward power, piston 22 was pushed away downwards in cylinder 20 vertically, will go up compression ring 30 and contact with first wedge 25, forces it radially outside, makes rubbing contact with the inwall 21 of cylinder 20.If,, the adjacent wedge 26 with next of another shoulder 78 is contacted in the axial direction just force wedge 25 to contact with the shoulder 76 of compression ring 33 in the axial direction so downward power surpasses the axial rub resistance of wedge 25.
This axial contact of compression ring 33 and wedge 26 makes wedge 26 diametrically to overhanging, makes rubbing contact with the inwall 21 of cylinder 20.If downward axial force still surpasses the surface friction drag of wedge 25 and 26 generations, then make whole friction assembly parts 14 with spring 16 to lower compression.
Therefore will rub assembly parts 14 and spring 16 done creationary combination, increased and installed 10 load-carrying ability.Found through experiments, the friction assembly parts 14 of three wedge and four compression rings is arranged, increase about five times than the load-carrying ability of independent spring 16.Therefore, the present invention's assembly parts that rubs can significantly reduce the total length and the cost of device 10, and greatly improves its application area.
Existing detailed consideration friction assembly parts 14 is especially noted Fig. 1,2 and 5-7, and the wedge 25 and 26 of 30,33 and 36 and one groups of one group of compression rings and its overlapping is arranged usually.Wedge is generally similar each other, therefore only is described in detail with regard to wedge 25 hereinafter.
Wedge 25 is generally a breach ring-type element 40, is hollow on its whole axial lengths.Ring part 40 have one in the hole that is roughly hourglass shape 50 of axially stretching in the heart.Hole 50 forms the prominent partially face in a slope that tilts inwards, or shoulder 65A, the prominent partially face 63A in the slope that inwards tilt relative with.In the external diameter of prominent partially surface or edge 63A, along axially reducing gradually to center ring portion 61, conical portion in formation hole 50 or space 63.
Similarly, the external diameter of interior prominent partially surperficial 65A reduces gradually to center ring portion 61 in the axial direction, forms the conical portion or the space 65 in hole 50.Hole portion 65 forms an oblique shoulder or edge 65A.Space 65 is at the offside of the radial symmetry axis of wedge 55, roughly with space 63 symmetries.There is the cross section of circular in center annular portion 61, forms an annular space 67 between annular space 63 and 65.
As shown in Figure 2, the ring part 40 of wedge 25 generally has the radial hole 42 of a crack shape, by its whole axial lengths and radial thickness, ring part 40 can radially outwards be moved, when the compression ring such as compression ring 33 contacts with annular shoulder 53, ring part 40 can move radially outward, contacts with the wall 21 of cylinder 20.Some similar substantially crack shape radial holes are arranged,, sizable spacing is arranged in the axial direction along the outer rim of ring part 40 such as hole 43,44 and 45.Radially stretch from center ring portion 61 in hole 43,44 and 45, not exclusively passes through by the radial thickness of ring part 40 substantially.Therefore hole 43,44 and 45 makes ring part 40 can do articulated distortion in the above, is convenient to outwards contact with inwall 21 diametrically.
Now specifically with reference to Fig. 1,5 and 7 detailed consideration compression rings 30,33 and 36, friction assembly parts 14 generally has a pair of external compression ring 30 and 36 and interior compression rings 33.But those of ordinary skills person is appreciated that also available one or more similar interior compression ring.
Similarly, the shape and the size of prominent partially face 78, the declining edge (not shown) complementation with the interior annular shoulder (not shown) of the wedge 26 of disposed adjacent contacts with each other.Prominent partially face 78 is 70 outwards stretching, extensions from the expansion section, and its external diameter is along axially reducing gradually to distal portion 74.A cylindrical center slotted hole 81, whole axial lengths of compression ring 33 in passing so that with piston 22 coaxial contacts of piston cylinder assembly parts 12, and can be free to slide along its axial length.
Referring now to Fig. 3 another energy dissipator 100 by manufacturing of the present invention is made labor, device 100 is basic similar to energy dissipator 10.Device 100 comprises a piston-cylinder assembly parts 112, and the spring 116 and a pair of friction assembly parts 114 and 115 of preload is enclosed in the inside fully.
Piston cylinder assembly parts 112 is roughly similar to the piston cylinder assembly parts 12 of energy dissipator 10, has a microscler cylinder 120, is hollow along whole axial lengths, and is similar to cylinder 20.A stock shape piston 122 is similar to piston 22, join vertically with cylinder 120, and with spring 116 and friction assembly parts 114 and 115 coaxial contacts.
The difference of piston cylinder assembly parts 112 and piston cylinder assembly parts 12 has been two retainers 117 and 118, the moving in cylinder 120 with restraining spring 116 and friction assembly parts 114 and 115.In this respect, retainer 118 has the long tube body 165 of a nut shape, and it can make adjustable screw threads for fastening with the outer end 125 of piston 122 along being hollow on whole axial lengths.
Now consider spring 116, its design is generally similar to the spring 16 of device 10 to structure, coaxial being installed on the piston 122 in cylinder 120.Spring 116 is configured between the friction assembly parts 114 and 115, makes piston 122 axial when mobile in cylinder 120, and device 110 can be with too much dissipating.Therefore, when piston 122 was pushed away forward in cylinder 120, the front end 135 of retainer 118 was against friction assembly parts 114, along inwall 121 promotion that rubs forward, energy dissipated it.In the forward path of piston 122, the mobile of friction assembly parts 115 continues to be subjected to retainer 117 to limit.
Similarly, when piston 122 was released cylinder 120 backward, a lid 145 that is configured on piston 122 distant place front ends 150 against friction assembly parts 115, along inwall 121 frictional movement backward, disappeared energy it.In piston 122 stroke backward, mobile plate 155 restrictions that continue to be subjected to circular on cylinder 120 near-ends 157 of friction assembly parts 114.
A plate 155 is general fixing on the near-end 157 of cylinder 120, against friction assembly parts 114, spring 116 and friction assembly parts 114 and 115 is contained in the cylinder 120.Plate 155 has a circular hole 160, and the external diameter complementation of shape and size and retainer 118 can be connected the body 165 of retainer 118 with cylinder 120, stretches in the cylinder 120 by hole 160.Body 165 stretches into a ring head 170 backward, becomes one, and the external diameter of ring head is greater than the external diameter of body 165, also greater than the diameter in hole 160.So when retainer 118 when piston 122 advances, head 170 is against plate 155, its stroke in cylinder 120 is subjected to the restriction of plate 155.
Existing detailed consideration friction assembly parts 114 and 115, their structure shape is similar, only does general expression in the drawings.Therefore, hereinafter only friction assembly parts 114 is described in detail.Those of ordinary skills can understand after having read explanation of the present invention, and the structural type that can have nothing in common with each other of friction assembly parts depends on the application feature of device 100.
Another energy dissipator 200 that existing detailed consideration is made by the present invention, specifically referring to Fig. 4, roughly similar to energy dissipator 100.Device 200 comprises piston cylinder assembly parts 212, and it is basic similar to piston cylinder assembly parts 112, and the inside puts reloading spring 216 and a pair of friction assembly parts 214 and 215.
Piston cylinder assembly parts 212 is roughly similar to piston cylinder assembly parts 112, and difference is not comprise the retainer similar to retainer 117.In addition, piston cylinder assembly parts 212 has a retainer 218, and is similar to retainer 118, and different person is that its front end 235 is lasting against friction assembly parts 214.So, when the piston 222 of piston cylinder assembly parts 212 is pushed, no matter in cylinder 220, push away, or in it to extrapolation, the whole assembly 230 that forms by two friction assembly parties 214 and 215, and middle springs 226, just according to application of force direction, along inwall 221 frictional movement of cylinder 220.The length of spring 216 is constant, and therefore the restraint that applies on it is constant.
Now specifically with reference to Fig. 8 detailed consideration another energy dissipator 300 by the present invention's manufacturing, this device is roughly similar to energy dissipator 200.Energy dissipator 300 comprises a piston cylinder assembly parts 312, and is general similar to piston cylinder assembly parts 212.Piston cylinder assembly parts 312 has a cylinder 320 in addition, wherein holds a friction assembly parts 314.
Though disclose various embodiment of the present invention above, should understand in certain spirit and scope of the claims behind literary composition, also possible, and also consider to do various variation.Therefore, the inventor is not intended to limit with the actual content of the announcement of specification digest and this paper, and the claims behind the Ying Yiwen define invention scope.
Claims (10)
1, a kind ofly be used to absorb oscillating load and the energy dissipator of the kinetic energy that is used to dissipate, described device comprises:
A piston cylinder assembly parts, it has a hollow cylinder and a local at least piston that is installed in the described hollow cylinder;
The friction assembly parts of a positive action between described cylinder and described piston dissipates and is applied to described cylinder and described piston big load each other vertically in order to produce surface friction drag betwixt;
A reloading spring assembly parts that is placed in the described hollow cylinder is used to act on described friction assembly parts, so that produce described surface friction drag between described cylinder and described piston;
Described piston has one in radially-protruding expansion section, described friction assembly parts outer position upper edge; And
A retainer is with limit described piston and described cylinder freely moving to axial each other with the contacting of described expansion section of described piston;
It is characterized in that:
The installation of described piston and described cylinder it can be had nothing to do with described friction assembly parts as freely moving axially each other, thereby during running well, little load can make described piston and described cylinder move to axial;
Described friction assembly parts also has a hole of extending vertically, and the installation of convenient described piston and described cylinder can freely move axially it and irrelevant with described friction assembly parts each other;
Described spring assembly acts on the described friction assembly parts, be subjected to resistance ground promotion, when described friction assembly parts only is subjected to little loading, can make the relative movement freely and unlikelyly cause big surface friction drag basically of friction assembly parts, when described friction assembly parts only is subjected to big loading, can make described friction assembly parts be subjected to bias voltage and produce big surface friction drag;
Described piston cylinder assembly parts has a space, and described space makes described piston during described normal operation, be subjected under the little loading, its with can do before described friction assembly parts contacts limitedly to relatively move freely basically.
2, energy dissipator according to claim 1, it is characterized in that described device also comprise one be configured in described first the friction assembly parts with respect on the opposite side of described spring another the friction assembly parts.
3, energy dissipator according to claim 1 is characterized in that described device also comprises another spring assembly, is used for described friction assembly parts is flexibly applied opposite with described first a spring assembly biasing force on axially.
4, energy dissipator according to claim 1, it is characterized in that described piston cylinder assembly parts has a friction absorption surface, described friction assembly parts has at least one and the contacted wedge of described friction absorption surface and a plurality of separately compression ring, described wedge and described compression ring overlap, so that wedge is radially outwards passed, make rubbing contact with described friction absorption surface.
5, energy dissipator according to claim 4 is characterized in that described compression ring separately comprises a pair of external compression ring, respectively puts one at friction assembly parts two ends.
6, energy dissipator according to claim 5 is characterized in that described compression ring separately also comprises compression ring at least one.
7, energy dissipator according to claim 6 is characterized in that described wedge comprises a ring part, and this ring part has a hole that extends axially that is configured in the center.
8, energy dissipator according to claim 4 is characterized in that described wedge has at least one axial crack mouth.
9, energy dissipator according to claim 2, it is characterized in that this energy dissipator also has another retainer, contact with at least one described friction assembly parts, described another retainer is arranged on the described piston, makes to keep a fixing distance separately between the described friction assembly parts.
10, energy dissipator according to claim 9 is characterized in that described another retainer is suitable for making described spring assembly to take a given fixed length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90107601 CN1021245C (en) | 1990-09-05 | 1990-09-05 | Energy damping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90107601 CN1021245C (en) | 1990-09-05 | 1990-09-05 | Energy damping device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1059587A CN1059587A (en) | 1992-03-18 |
| CN1021245C true CN1021245C (en) | 1993-06-16 |
Family
ID=4880621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90107601 Expired - Fee Related CN1021245C (en) | 1990-09-05 | 1990-09-05 | Energy damping device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1021245C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101216088B (en) * | 2008-01-18 | 2010-06-02 | 北京工业大学 | Barrel-type friction-changing damper |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011159127A2 (en) | 2010-06-17 | 2011-12-22 | Lg Electronics Inc. | Washing machine |
| US11304528B2 (en) | 2012-09-20 | 2022-04-19 | Steelcase Inc. | Chair assembly with upholstery covering |
| USD697726S1 (en) | 2012-09-20 | 2014-01-21 | Steelcase Inc. | Chair |
| US9458905B2 (en) * | 2012-09-20 | 2016-10-04 | Steelcase Inc. | Spring assembly and method |
| KR101754683B1 (en) | 2014-07-11 | 2017-07-06 | 엘지전자 주식회사 | Washing machine |
| CN108633686B (en) * | 2018-05-15 | 2019-11-19 | 河南科技大学 | A kind of tubular vibration reducer and its oscillation damping method for vegetable transplanting machine |
| CN108679356A (en) * | 2018-06-27 | 2018-10-19 | 佛山科学技术学院 | A kind of vibration damping bellows |
-
1990
- 1990-09-05 CN CN 90107601 patent/CN1021245C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101216088B (en) * | 2008-01-18 | 2010-06-02 | 北京工业大学 | Barrel-type friction-changing damper |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1059587A (en) | 1992-03-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4955467A (en) | Energy damping device | |
| JP3430174B2 (en) | Surface effect damper | |
| CN1021245C (en) | Energy damping device | |
| US3975007A (en) | Resilient mounting structure | |
| US6290038B1 (en) | Elastomer damper | |
| US6247687B1 (en) | Elastomer damper | |
| JP6079983B2 (en) | Rotary cutting device having vibration damping means | |
| CN1429321A (en) | Suspension strut with damping | |
| RU2428600C2 (en) | Damper | |
| KR101511434B1 (en) | Cylindrical vibration control device having hysteretic damper and friction damper | |
| CN1761823A (en) | Disc brake | |
| US4524851A (en) | Mechanical snubber | |
| US5197573A (en) | Energy dissipator | |
| CN109750594B (en) | Large-span bridge composite multi-directional wind-resistant and earthquake-resistant damper and working method thereof | |
| CN108194570B (en) | Rigid-elastic conversion shock absorber | |
| CN212224269U (en) | Double-rod type friction damper | |
| JPH04102729A (en) | Energy attenuator | |
| KR960002026B1 (en) | Energy damping device | |
| CN210949669U (en) | Mine electromechanical device's shock attenuation protection mechanism | |
| US3107906A (en) | Buffer device | |
| JP3728431B2 (en) | Telescopic double tube telescopic part wedge type fixing device | |
| AU639942B2 (en) | Energy damping device | |
| CA2067213C (en) | Energy damping device | |
| KR102322358B1 (en) | Vibration control unit having hanger bolt | |
| CN112896495B (en) | Damper, unmanned aerial vehicle foot rest and unmanned aerial vehicle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| OR01 | Other related matters | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |