CN112228504A - Skeleton type buffer device and setting method thereof - Google Patents
Skeleton type buffer device and setting method thereof Download PDFInfo
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- CN112228504A CN112228504A CN202011082488.9A CN202011082488A CN112228504A CN 112228504 A CN112228504 A CN 112228504A CN 202011082488 A CN202011082488 A CN 202011082488A CN 112228504 A CN112228504 A CN 112228504A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
- F16F15/08—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with rubber springs ; with springs made of rubber and metal
- F16F15/085—Use of both rubber and metal springs
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Abstract
A plurality of heightening devices which are connected with an upper framework and can enable the upper framework or the lower framework to freely ascend and descend are fixed on the lower framework, a plurality of combined elastic buffer parts are arranged between every two adjacent heightening devices, and the upper end and the lower end of each combined elastic buffer part are respectively fixedly connected with the upper framework and the lower framework. According to the invention, the plurality of heightening devices are arranged between the upper framework and the lower framework, so that the upper framework or the lower framework can be freely lifted up and down, a guide foundation is provided for the movement after the upper framework and the lower framework are pressed to move downwards and the pressure is relieved, the plurality of combined elastic buffer parts are arranged between the adjacent heightening devices, the function of quickly absorbing and slowly dissipating impact energy can be realized, the impact force is effectively reduced, the motion main body is protected, the device has a reset function, the corrosion resistance and the fatigue resistance are good, the device can be repeatedly used, the application cost is reduced, the device can adapt to application environments with different buffer space dimensions, and the application range is wide.
Description
Technical Field
The invention belongs to the technical field of vibration reduction and buffering, and particularly relates to a skeleton type buffering device and an arrangement method thereof.
Background
The buffer device has wide application in the fields of aerospace, automobile industry, high-speed machinery and the like, and the core element of the buffer device is a damping element. The existing damping element such as rubber damping has simple structure and convenient processing and manufacturing, but has poor high temperature resistance and fatigue resistance; the hydraulic damping buffer effect is good, the damping is controllable, but the design and maintenance are complex; the damping elements have limited application occasions, the service performance, the design maintenance and other aspects need to be further improved, the bearing capacity is poor, the damping is small, the ageing resistance and the corrosion resistance are poor, the manufacturing and the processing are complex, and the service life is short; in addition, the arrangement of the existing buffer devices is determined by experience, and there is no uniform basis and the technical requirements on workers are high, so that improvement is needed to solve the problems.
Disclosure of Invention
The technical problems solved by the invention are as follows: the framework type buffer device and the setting method thereof are characterized in that a plurality of heightening devices are arranged between an upper framework and a lower framework, so that the upper framework or the lower framework can be freely lifted up and down, a guide foundation is provided for the downward movement under pressure and the movement after pressure relief, a plurality of combined elastic buffer parts are arranged between the adjacent heightening devices, the function of quickly absorbing impact energy and slowly dissipating the impact energy can be realized, the impact force is effectively reduced, a motion main body is protected, the framework type buffer device has a resetting function, the framework type buffer device is good in corrosion resistance and fatigue resistance, can be repeatedly used, the application cost is reduced, can adapt to application environments with different buffer space scales, and is wide in application range.
The technical scheme adopted by the invention is as follows: the framework type buffer device comprises an upper framework and a lower framework located below the upper framework, wherein a plurality of heightening devices which are connected with the upper framework and can enable the upper framework or the lower framework to freely ascend and descend are fixed on the lower framework, a plurality of combined elastic buffer parts are arranged between every two adjacent heightening devices, and the upper end and the lower end of each combined elastic buffer part are fixedly connected with the upper framework and the lower framework respectively.
The upper framework and the lower framework are of annular structures with the same size.
Further, heightening device includes guide sleeve and guide bar, the terminal surface is fixed with a plurality of guide sleeve under the last skeleton, the skeleton up end is fixed with the guide bar that just position corresponds the same with guide sleeve quantity down, the guide bar inserts the interior upper and lower free lift that realizes the skeleton of guide sleeve.
Further, combination formula elastic buffer includes metal rubber, spring and connector, in the metal rubber cartridge spring inner chamber and through locating the connector at spring both ends with metal rubber encapsulation in the spring, the connector at both ends respectively with last skeleton and lower skeleton fixed connection about the spring.
Furthermore, the spring consists of a rigid section in the middle, compression sections at two ends of the rigid section and a connecting section at the outer end part of the compression section, the pitch of the rigid section is equal to the wire diameter of the spring, and one end of the connector is connected with the connecting section.
Further, the connector is the minor axis that the middle part was equipped with the shaft shoulder, connector one end linkage segment interference fit, or connector one end system has external thread groove and linkage segment screw in external thread groove, the shaft shoulder at connector middle part supports under last skeleton or on skeleton up end down with last skeleton or lower skeleton riveting back connector other end.
Further, connector middle part integral type is equipped with the system on the outer periphery wall of shaft collar and has the bayonet socket, connector one end is inserted in the linkage segment and the tip card of linkage segment is gone into in the bayonet socket, the corresponding terminal surface of connector middle part shaft collar supports under last skeleton or on the skeleton up end down with last skeleton or lower skeleton riveting back connector middle part shaft collar.
8. The method for setting the skeleton type buffer device is characterized in that: firstly, determining the overall dimension of the skeleton type buffer device according to the application occasion and the installation space size of the skeleton type buffer device; then determining the number and the characteristics of the combined elastic buffer parts according to the relationship between the total energy required to be buffered by the determined framework type buffer device and the energy consumed by the combined elastic buffer parts; finally, determining technical parameters related to the combined elastic buffer part, specifically comprising the following steps:
1) determining the number of the combined elastic buffer parts according to the relation between the total energy required to be buffered by the determined framework type buffer device and the energy consumed by the combined elastic buffer parts, wherein the specific calculation formula is as follows:
in the above formula, EtTotal energy m to be buffered for the skeleton-type buffer devicetThe total mass of the skeleton type buffer device needing buffering is represented by v, and the speed of the skeleton type buffer device needing buffering is represented by v;
2) the energy consumed by the single combined elastic buffer is determined by a hysteresis loop region surrounded by a loading curve p (x) and an unloading curve q (x), and the area of the hysteresis loop region enveloped by the loading curve p (x) and the unloading curve q (x) is the energy consumed by the single metal rubber spring buffer unit Δ W:
in the above formula, x is the compression displacement of the combined elastic buffer (1), x0The maximum compression displacement of the combined elastic buffer piece;
according to the total energy E of the skeleton type buffer device needing bufferingtAnd determining the number of the combined elastic buffer parts according to the energy delta W consumed by the single combined elastic buffer part, wherein the specific calculation relationship is as follows:
Et≤nΔW，
in the above formula, n is the number of the combined elastic buffer parts;
3) determining the main parameters of the spring in the combined elastic buffer: the total height H of the spring is determined according to the installation space of the framework type buffer device, and then the heights of the rigid section, the compression section and the connection section are sequentially determined according to the total height H of the spring, and the specific relation is as follows:
H1＝(25％～30％)H，
H2＝(65％～70％)H，
H3＝(5％～10％)H，
in the above, H1Height of rigid section, H2To compress the height of the section, H3Is the height of the connecting section.
Compared with the prior art, the invention has the advantages that:
1. according to the technical scheme, the plurality of height adjusting devices are arranged between the upper framework and the lower framework, so that the upper framework or the lower framework can be freely lifted up and down, and a guide foundation is provided for downward pressing and movement after pressure is relieved;
2. according to the technical scheme, the combined elastic buffer pieces are arranged between the adjacent heightening devices, so that the function of quickly absorbing impact energy and slowly dissipating the impact energy can be realized, the impact force is effectively reduced, and a moving main body is protected;
3. the technical scheme adopts the combined elastic buffer part with the metal rubber and the spring, so that the combined elastic buffer part has good corrosion resistance and fatigue resistance while the buffer device is ensured to have good reset function;
4. according to the technical scheme, firstly, the overall dimension of the framework type buffer device is determined according to the application occasion and the size of the installation space of the framework type buffer device, then the quantity and the characteristics of the combined elastic buffer devices are determined according to the relation between the total energy required to be buffered by the framework type buffer device and the energy consumed by the combined elastic buffer devices, and finally, the technical parameters related to the combined elastic buffer devices are determined, so that the reliable and effective buffer device arrangement basis is provided, and the use requirement of the buffer application position is met;
5. this technical scheme can use repeatedly to reduce the application cost, through the size of adjustment combination formula elastic buffer spare and the shape configuration of last skeleton and lower skeleton, but the flexibility is applicable to different buffering application, and application scope is wide.
Drawings
FIG. 1 is a schematic structural diagram of a skeleton-type buffering device according to the present invention;
FIG. 2 is a schematic view of a combined elastic buffer according to the present invention;
FIG. 3 is a schematic view of the spring structure of the present invention;
FIG. 4 is a schematic structural diagram of a first connecting head according to the present invention;
FIG. 5 is a schematic structural diagram of a second connecting head according to the present invention;
FIG. 6 is a graph showing a comparison of the lower instantaneous maximum equivalent stress for a first solution employing a conventional buffer structure and a second solution employing the present invention;
fig. 7 is a plot of the energy loaded versus the compression displacement characteristic of a single unitized elastomeric bumper of the present invention.
Detailed Description
In the following, an embodiment of the present invention will be described in conjunction with fig. 1 to 7, so as to clearly and completely describe the technical solution, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, not the whole embodiment.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
The framework type buffer device comprises an upper framework 2 and a lower framework 3 positioned below the upper framework, wherein the upper framework 2 and the lower framework 3 can be in various shapes such as a ring shape, a cake shape and a plate shape, a plurality of height adjusting devices 4 which are connected with the upper framework 2 and can enable the upper framework 2 or the lower framework 3 to freely lift up and down are fixed on the lower framework 3, a plurality of combined elastic buffer parts 1 are arranged between every two adjacent height adjusting devices 4, and the upper end and the lower end of each combined elastic buffer part 1 are respectively fixedly connected with the upper framework 2 and the lower framework 3; by adopting the structure, the functions of large damping dissipation energy and quick reset can be realized, and the combined elastic buffer part 1, the upper framework 2 and the lower framework 3 can be flexibly applied to different buffer application fields by adjusting the size and the configuration.
When the upper framework 2 and the lower framework 3 are of the same annular structure, the heightening device 4 is distributed between the annular bottom surface of the upper framework 2 and the annular top surface of the lower framework 3, the heightening device 4 comprises guide sleeves 4-1 and guide rods 4-2, a plurality of guide sleeves 4-1 are fixed on the lower end surface of the upper framework 2, the guide rods 4-2 which are the same as the guide sleeves 4-1 in number and correspond to the positions are fixed on the upper end surface of the lower framework 3, the guide rods 4-2 are inserted into the guide sleeves 4-1 to achieve the vertical free lifting of the upper framework 2, and the rapid resetting function of the upper framework 2 and the lower framework 3 is achieved.
As shown in fig. 2, the combined elastic buffer 1 comprises a metal rubber 1-1, a spring 1-2 and connectors 1-3, the metal rubber 1-1 is inserted into the inner cavity of the spring 1-2 and the metal rubber 1-1 is encapsulated in the spring 1-2 through the connectors 1-3 arranged at the two ends of the spring 1-2, the connectors 1-3 at the upper and lower ends of the spring 1-2 are respectively and fixedly connected with an upper framework 2 and a lower framework 3, in the above structure, the metal rubber 1-1 is a metal wire mesh woven by winding a spiral stainless steel wire on the rubber and is wound into a specific shape or is directly wound into a specific shape by adopting a spiral coil to form a metal rubber blank block, and finally the metal rubber blank block is pressed into a strip-shaped metal rubber 1-1 in a mold and assembled into the spring 1-2 with variable pitch, the combined elastic buffer part 1 with the structure can realize the functions of fast absorbing impact energy and slow dissipation, effectively reduces impact force to protect a motion body, has the reset function, combines the characteristics of corrosion resistance, fatigue resistance and the like of the metal rubber 1-1, can be repeatedly used, and reduces application cost.
As shown in FIG. 3, the spring 1-2 is composed of a rigid section 1-21 in the middle, a compression section 1-22 at two ends of the rigid section 1-21 and a connection section 1-23 at the outer end of the compression section 1-22, the pitch of the rigid section 1-21 is equal to the wire diameter of the spring 1-2, and one end of the connection section 1-3 is connected with the connection section 1-23.
As shown in fig. 4, the connector 1-3 is a short shaft with a shaft shoulder at the middle part, the connecting section 1-23 at one end of the connector 1-3 is in interference fit, or the outer thread groove 1-31 is formed at one end of the connector 1-3 and the connecting section 1-23 is screwed into the outer thread groove 1-31, and the shaft shoulder at the middle part of the connector 1-3 is abutted against the lower end face of the upper framework 2 or the upper end face of the lower framework 3 after the other end of the connector 1-3 is riveted with the upper framework 2 or the lower framework 3.
As shown in fig. 5, a shaft collar is integrally arranged in the middle of each of the connectors 1 to 3, bayonets 1 to 32 are formed in the outer circumferential wall of the shaft collar, one end of each of the connectors 1 to 3 is inserted into the corresponding connecting section 1 to 23, the end of each of the connecting sections 1 to 23 is clamped into the corresponding bayonet 1 to 32, and the end face of the corresponding end of the shaft collar in the middle of each of the connectors 1 to 3 abuts against the lower end face of the upper frame 2 or the upper end face of the lower frame 3 after the other end of each of the connectors 1 to 3 is riveted with the upper frame.
The method for setting the framework type buffer device comprises the steps of firstly determining the outline dimension of the framework type buffer device according to the application occasion and the installation space size of the framework type buffer device; then determining the number and the characteristics of the combined elastic buffer parts 1 according to the relationship between the total energy required to be buffered by the determined framework type buffer device and the energy consumed by the combined elastic buffer parts 1; finally, determining technical parameters related to the combined elastic buffer 1, specifically comprising the following steps:
1) determining the number of the combined elastic buffer parts 1 according to the relation between the total energy required to be buffered by the determined framework type buffer device and the energy consumed by the combined elastic buffer parts 1, wherein the specific calculation formula is as follows:
in the above formula, EtTotal energy m to be buffered for the skeleton-type buffer devicetThe total mass of the skeleton type buffer device needing buffering is represented by v, and the speed of the skeleton type buffer device needing buffering is represented by v;
2) the energy consumed by the single combined elastic buffer 1 is determined by the hysteresis loop region surrounded by the loading curve p (x) and the unloading curve q (x), as shown in fig. 7, the area of the hysteresis loop region enveloped by the loading curve p (x) and the unloading curve q (x) is the energy Δ W consumed by the single metal rubber spring buffer unit:
in the above formula, x is the compression displacement of the combined elastic buffer (1), x0Is the maximum compression displacement of the combined elastic buffer part (1);
according to the total energy E of the skeleton type buffer device needing bufferingtAnd the energy delta W consumed by the single combined elastic buffer parts 1, determining the number of the combined elastic buffer parts (1), and specifically calculating the following relation:
Et≤nΔW，
in the above formula, n is the number of the combined elastic buffer parts 1;
3) determining the main parameters of the springs 1-2 in the combined elastic buffer 1: determining the total height H of the spring (1-2) according to the installation space of the framework type buffer device, and sequentially determining the heights of the rigid section 1-21, the compression section 1-22 and the connection section 1-23 according to the total height H of the spring 1-2, wherein the specific relation is as follows:
H1＝(25％～30％)H，
H2＝(65％～70％)H，
H3＝(5％～10％)H，
in the above, H1Height of rigid segments 1-21, H2To compress the height of sections 1-22, H3The height of the connecting sections 1-23; in the above calculation process, H1Equal to 25% H, 26% 2H, 27% H, 28% H, 29% H or 30% H, H2Equal to 65% H, 66% H, 67% H, 68% H, 69% H or 70% H, H3Equal to 5% H, 6% H, 7% H, 8% H, 9% H, or 10% H; in the above structure, the combined elastic buffer 1 is formed in a skeleton type after the number is determinedThe buffer device may have a single ring structure as shown in fig. 1, or may have a structure in which a small ring is provided in a large ring.
Respectively establishing transient dynamic models of different buffering devices under the condition of the same compression ratio, carrying out simulation calculation comparison, establishing two buffering device models under the condition of approximately the same grid in a three-dimensional model, calculating so as to compare, wherein the other calculation settings are the same, thus obtaining instantaneous maximum equivalent stress comparison graphs under the two buffering devices, as shown in fig. 6, the transient maximum equivalent stress comparison graphs are a scheme I adopting a traditional buffering structure and a scheme II adopting the invention, wherein the scheme I adopts the deformation consumption energy of the traditional scheme and can be used only once, the scheme II adopts the deformation consumption energy of a skeleton type buffering device and can be repeatedly utilized for many times, and the scheme I is shown in the figure, exceeds the yield limit (450MPa) of the material at 0.12ms and is far greater than the allowable stress (200MPa) required by buffering; and the transient equivalent stress of the second scheme is lower than the required allowable stress.
The above-mentioned embodiments are merely preferred embodiments of the present invention, which are not intended to limit the scope of the present invention, and therefore, all equivalent changes made by the contents of the claims of the present invention should be included in the claims of the present invention.
Claims (8)
1. Skeleton formula buffer, its characterized in that: including last skeleton (2) and lower skeleton (3) that is located its below, be fixed with on skeleton (3) down a plurality ofly and last skeleton (2) be connected and can make skeleton (2) or lower skeleton (3) freely go up and down heighten device (4), adjacent heighten and all be equipped with a plurality of combination formula elastic buffer spare (1) between device (4), both ends respectively with last skeleton (2) and lower skeleton (3) fixed connection about combination formula elastic buffer spare (1).
2. The skeletal buffer of claim 1, wherein: the upper framework (2) and the lower framework (3) are of annular structures with the same size.
3. A skeletal buffer device according to claim 1 or 2, wherein: heightening device (4) including guide sleeve (4-1) and guide bar (4-2), it is fixed with a plurality of guide sleeve (4-1) to go up skeleton (2) lower terminal surface, skeleton (3) up end is fixed with guide bar (4-2) the same and position of quantity corresponds with guide sleeve (4-1) down, guide bar (4-2) insert in guide sleeve (4-1) and realize going up skeleton (2) from top to bottom freely go up and down.
4. The skeletal cushioning device of claim 3, wherein: the combined elastic buffer part (1) comprises metal rubber (1-1), a spring (1-2) and connectors (1-3), the metal rubber (1-1) is packaged in the spring (1-2) through the connectors (1-3) arranged at two ends of the spring (1-2) in an inner cavity of the metal rubber (1-1) plug-in mounting spring (1-2), and the connectors (1-3) at the upper end and the lower end of the spring (1-2) are fixedly connected with the upper framework (2) and the lower framework (3) respectively.
5. The skeletal cushioning device of claim 4, wherein: the spring (1-2) is composed of a rigid section (1-21) in the middle, compression sections (1-22) at two ends of the rigid section (1-21) and connecting sections (1-23) at outer end parts of the compression sections (1-22), the pitch of the rigid section (1-21) is equal to the wire diameter of the spring (1-2), and one end of the connector (1-3) is connected with the connecting sections (1-23).
6. The skeletal cushioning device of claim 5, wherein: the short shaft is characterized in that the connector (1-3) is a short shaft with a shaft shoulder arranged in the middle, one end connecting section (1-23) of the connector (1-3) is in interference fit, or an outer thread groove (1-31) and a connecting section (1-23) are screwed into the outer thread groove (1-31) at one end of the connector (1-3), the other end of the connector (1-3) is abutted to the lower end face of the upper framework (2) or the upper end face of the lower framework (3) through the shaft shoulder arranged in the middle of the connector (1-3) after the upper framework (2) or the lower framework (3) is riveted.
7. The skeletal cushioning device of claim 5, wherein: connector (1-3) middle part integral type is equipped with the shaft collar and the system has bayonet socket (1-32) on the outer circumferential wall of shaft collar, connector (1-3) one end is inserted in linkage segment (1-23) and the tip card of linkage segment (1-23) is gone into in bayonet socket (1-32), the corresponding terminal surface of connector (1-3) middle part shaft collar supports under last skeleton (2) terminal surface or skeleton (3) up end down with last skeleton (2) or skeleton (3) riveting back connector (1-3) the other end.
8. The method for setting the skeleton type buffer device is characterized in that: firstly, determining the overall dimension of the skeleton type buffer device according to the application occasion and the installation space size of the skeleton type buffer device; then determining the number and the characteristics of the combined elastic buffer parts (1) according to the relationship between the total energy required to be buffered by the determined framework type buffer device and the energy consumed by the combined elastic buffer parts (1); finally, determining technical parameters related to the combined elastic buffer (1), and specifically comprising the following steps:
1) determining the number of the combined elastic buffer parts (1) according to the relation between the total energy required to be buffered by the determined framework type buffer device and the energy consumed by the combined elastic buffer parts (1), wherein the specific calculation formula is as follows:
in the above formula, EtTotal energy m to be buffered for the skeleton-type buffer devicetThe total mass of the skeleton type buffer device needing buffering is represented by v, and the speed of the skeleton type buffer device needing buffering is represented by v;
2) the energy consumed by the single combined elastic buffer (1) is determined by a hysteresis loop area surrounded by a loading curve p (x) and an unloading curve q (x), and the area of the hysteresis loop area enveloped by the loading curve p (x) and the unloading curve q (x) is the energy consumed by the single metal rubber spring buffer unit Δ W:
in the above formula, x is a combined elastic bufferCompression displacement, x, of the punch (1)0Is the maximum compression displacement of the combined elastic buffer part (1);
according to the total energy E of the skeleton type buffer device needing bufferingtAnd the energy delta W consumed by the single combined elastic buffer parts (1) determines the number of the combined elastic buffer parts (1), and the specific calculation relationship is as follows:
Et≤nΔW，
in the above formula, n is the number of the combined elastic buffer parts (1);
3) determining the main parameters of a spring (1-2) in the combined elastic buffer (1): determining the total height H of the spring (1-2) according to the installation space of the framework type buffer device, and sequentially determining the heights of the rigid section (1-21), the compression section (1-22) and the connection section (1-23) according to the total height H of the spring (1-2), wherein the specific relation is as follows:
H1＝(25％～30％)H，
H2＝(65％～70％)H，
H3＝(5％～10％)H，
in the above, H1Is the height of the rigid section (1-21), H2Is the height of the compression section (1-22), H3Is the height of the connecting sections (1-23).
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| CN113187848A (en) * | 2021-05-27 | 2021-07-30 | 哈尔滨工业大学 | Buffer device |
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| CN202125552U (en) * | 2011-06-24 | 2012-01-25 | 东北石油大学 | Metal-rubber vibration isolator with composite rigidity for oil rig |
| CN206708277U (en) * | 2017-04-28 | 2017-12-05 | 福州大学 | A kind of composite damper |
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| DE2914171A1 (en) * | 1979-04-07 | 1980-10-09 | Bayer Ag | High temp. wall seal - with profiled strip of elastomer or elastomer coated springy metal |
| DE3135316A1 (en) * | 1980-10-24 | 1982-08-12 | VEB IFA-Automobilwerke Ludwigsfelde Stammbetrieb des VEB IFA-Kombinates Nutzkraftwagen, DDR 1720 Ludwigsfelde | Combined, asymmetrical three-point mounting for tiltable driver's cabs on motor vehicles |
| CN202125552U (en) * | 2011-06-24 | 2012-01-25 | 东北石油大学 | Metal-rubber vibration isolator with composite rigidity for oil rig |
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| CN113187848A (en) * | 2021-05-27 | 2021-07-30 | 哈尔滨工业大学 | Buffer device |
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