CN113719577A - Shock-resistant vibration isolator with rigidity kick excitation coupled damping - Google Patents
Shock-resistant vibration isolator with rigidity kick excitation coupled damping Download PDFInfo
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- CN113719577A CN113719577A CN202111286288.XA CN202111286288A CN113719577A CN 113719577 A CN113719577 A CN 113719577A CN 202111286288 A CN202111286288 A CN 202111286288A CN 113719577 A CN113719577 A CN 113719577A
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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
- F16F15/022—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 dampers and springs in combination
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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
- F16F15/06—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 metal springs
- F16F15/067—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 metal springs using only wound springs
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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
- F16F2222/00—Special physical effects, e.g. nature of damping effects
- F16F2222/04—Friction
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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
- F16F2228/00—Functional characteristics, e.g. variability, frequency-dependence
- F16F2228/06—Stiffness
- F16F2228/066—Variable stiffness
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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
- F16F2232/00—Nature of movement
- F16F2232/08—Linear
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- Vibration Prevention Devices (AREA)
Abstract
The invention discloses an impact-resistant vibration isolator with stiffness jump excitation coupled damping, and belongs to the field of vibration isolators. The vibration isolation device comprises a protective sleeve, a vibration isolation platform and a rigidity jump mechanism, wherein the vibration isolation platform is used for mounting a device to be subjected to vibration isolation; the damping self-adaptive mechanism is arranged in the protective sleeve and used for generating variable damping and absorbing excessive impact energy; the rigidity driving damping mechanism is arranged between the rigidity sudden jump mechanism and the damping self-adaptive mechanism and is used for exciting damping force after the rigidity sudden jump; the stiffness snap-through mechanism comprises a lifting assembly, a first stiffness spring, a second stiffness spring and a protection triggering assembly. The shock-resistant vibration isolator is reasonable in structure, and utilizes the rigidity abrupt change to trigger the generation of damping, so that the rigidity force and the damping force can absorb the impact energy together.
Description
Technical Field
The invention mainly relates to the field of vibration isolators, in particular to an impact-resistant vibration isolator with stiffness kick excitation coupled damping.
Background
Mechanical equipment and electronic equipment are often subjected to certain vibration and impact in a working environment or during transportation, and in order to ensure normal use of the equipment and prolong the service life of the equipment in engineering, vibration isolators capable of absorbing energy are usually installed on the equipment and the equipment. The vibration isolator in the prior art usually adopts a single energy absorption mode, namely, a rigidity force or a damping force when absorbing large impact energy. Therefore, the vibration isolator which absorbs the impact energy simultaneously through rigidity and damping is designed to have very important application value.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: aiming at the technical problems in the prior art, the invention provides the shock-resistant vibration isolator which is reasonable in structure, utilizes the rigidity mutation to trigger the generation of damping, and enables the rigidity force and the damping force to jointly absorb the impact energy.
In order to solve the problems, the solution proposed by the invention is as follows: a shock-resistant vibration isolator with stiffness jump excitation coupling damping comprises a protective sleeve and a vibration isolation platform used for mounting equipment to be isolated.
The rigidity jump mechanism is arranged in the protective sleeve, is connected with the vibration isolation platform and is used for changing the lifting movement rigidity of the vibration isolation platform;
the damping self-adaptive mechanism is arranged in the protective sleeve and is used for generating variable damping and absorbing surplus impact energy;
and the rigidity driving damping mechanism is arranged between the rigidity sudden jump mechanism and the damping self-adaptive mechanism and is used for exciting damping force after the rigidity sudden jump.
Furthermore, the stiffness snap-through mechanism comprises a lifting assembly arranged on the protective sleeve, a first stiffness spring arranged between the lifting assembly and the vibration isolation platform, a second stiffness spring arranged between the lifting assembly and the damping self-adaptive mechanism, and a protection triggering assembly used for protecting the first stiffness spring and triggering stiffness snap-through; the stiffness value of the second stiffness spring is no less than ten times the stiffness value of the first stiffness spring.
Further, the lifting component comprises a linear guide rail arranged on the protective sleeve, a lifting slider arranged on the linear guide rail, a U-shaped plate arranged on the lifting slider, and a lifting plate arranged between the vibration isolation platform and the first stiffness springs.
Further, the protection triggering assembly comprises a rigidity jump board A and a rigidity jump board B which are arranged at the upper end of the U-shaped board, and a spring protection sleeve sleeved on the first rigidity spring.
Further, the damping self-adaptive mechanism comprises a translation damping plate capable of moving in the horizontal direction, a descending pressure assembly capable of applying variable pressure to the translation damping plate downwards, and an ascending pressure assembly capable of applying variable pressure to the translation damping plate upwards.
Furthermore, the descending pressure assembly comprises a pressure slide block B in sliding contact with the upper end face of the translational damping plate, and a lifting positioning plate B which is fixedly arranged on the protective sleeve and only allows the pressure slide block B to move downwards; the ascending pressure assembly comprises a pressure slide block A in sliding contact with the lower end face of the translation damping plate, a lifting positioning plate A fixedly connected with the protective sleeve and slidably sleeved on the pressure slide block A, and a compression-resistant balance spring arranged between the pressure slide block A and the protective sleeve along the vertical direction.
Further, the rigidity driving damping mechanism comprises a composite gear A which is arranged on the protective sleeve by adopting a support A, a composite gear B which is arranged on the protective sleeve by adopting a support B, a transmission chain for realizing the rotation transmission between the composite gear A and the composite gear B, and a horizontal rack which is arranged on the damping self-adaptive mechanism and is in meshing transmission with the composite gear B; the left end of the horizontal rack is fixedly connected with the translational damping plate, and the composite gear A is in meshing transmission with the U-shaped plate.
Further, the compound gear A comprises a gear A and a gear B which are coaxially and synchronously installed in a rotating manner, and the compound gear B comprises a gear C and a gear D which are coaxially and synchronously installed in a rotating manner; the gear A is in meshed transmission with the U-shaped plate, the gear B is in transmission connection with the gear C through a homodromous transmission chain, and the gear D is in meshed transmission with the horizontal rack.
Compared with the prior art, the invention has the following advantages and beneficial effects: the shock-resistant vibration isolator with the stiffness kick excitation coupling damping is provided with the first stiffness spring and the second stiffness spring, and the stiffness of the second stiffness spring is far greater than that of the first stiffness spring, so that the vibration isolator has two stiffness values and is respectively suitable for vibration isolation with small acting force and shock isolation with large acting force; in addition, when the U-shaped plate is moved up and down, the translational damping plate can be driven to move left and right, and the damping force borne by the translational damping plate can be changed, so that the external impact force is dissipated more quickly, and the displacement of the vibration-isolated object is reduced, namely, the displacement and the damping force are coupled with each other. Therefore, the shock-resistant vibration isolator is reasonable in structure, the rigidity abrupt change is utilized to trigger damping to generate, and the rigidity force and the damping force jointly absorb impact energy.
Drawings
Fig. 1 is a schematic structural principle diagram of the shock-resistant vibration isolator with stiffness jump excitation coupling damping of the invention.
Fig. 2 is a graph of the relationship between the rigidity and the displacement of the shock-resistant vibration isolator with the rigidity jump excitation coupling damping.
Fig. 3 is a graph of the relation between the damping force and the rigidity of the shock-resistant vibration isolator with the stiffness jump excitation coupling damping.
In the figure, 10 — vibration isolation platform; 11-a housing; 12-end cap a; 13-end cap B; 14-linear bearings; 21-linear guide rail; 22-lifting slide block; 23-a U-shaped plate; 24-a first rate spring; 25-lifting plate; 26-a spring protection sleeve; 27-a rigid diving board a; 28-rigid springboard B; 31-lifting positioning plate A; 32-pressure slide a; 33-translational damping plate; 330-wire through hole; 34-a flexible cord; 35-pressure slide B; 36-compression resistant balance spring; 37-lifting positioning plate B; 38-horizontal rack; 39 — a second rate spring; 41-bracket a; 42-gear a; 43-Gear B; 44-gear C; 45-gear D; 46-a homodromous transmission chain; 47-support B.
Detailed Description
The invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. For convenience of description, the system formed by the vibration isolation equipment and the impact-resistant vibration isolator is simply referred to as a vibration isolation system.
Referring to fig. 1, the shock-resistant vibration isolator with stiffness jump excitation coupling damping of the invention comprises a protective sleeve for mounting a vibration isolation platform 10 of a device to be isolated. In this embodiment, the protective sleeve includes a housing 11, and an end cap a12 and an end cap B13 respectively mounted on both ends of the housing 11. In one embodiment of the present invention, the vibration isolation platform 10 is a T-shaped plate, the lower end of which extends into the U-shaped plate 23 through the linear bearing 14 mounted on the end cap a 12. According to the actual use condition, the vibration isolation platform 10 can also be connected with a straight rod screw by adopting a circle center flat plate, as long as the upper end of the vibration isolation platform 10 is positioned outside the protective sleeve, and the lower end is positioned inside the protective sleeve.
The rigidity jump mechanism is arranged in the protective sleeve, is connected with the vibration isolation platform 10 and is used for changing the lifting movement rigidity of the vibration isolation platform 10; when the vibration isolation platform 10 provided with the vibration isolation equipment moves up and down, the stiffness jump mechanism can provide the vibration isolation platform 10 with at least two stiffness values with different sizes.
And the damping self-adaptive mechanism is arranged in the protective sleeve and is used for generating variable damping and absorbing excessive impact energy.
And the rigidity driving damping mechanism is arranged between the rigidity sudden jump mechanism and the damping self-adaptive mechanism and is used for exciting a damping force after the rigidity sudden jump.
Preferably, the stiffness jump mechanism comprises a lifting assembly arranged on the protective sleeve, a first stiffness spring 24 arranged between the lifting assembly and the vibration isolation platform 10, a second stiffness spring 39 arranged between the lifting assembly and the damping adaptive mechanism, and a protection triggering assembly for protecting the first stiffness spring 24 and triggering the stiffness jump. In the present embodiment, the first rate spring 24 is a metal coil spring having a tension/compression resistance characteristic, and the second rate spring 39 is also a metal coil spring having a tension/compression resistance characteristic. If the stiffness values of the first stiffness spring 24 and the second stiffness spring 39 are not related to the deformation amount thereof, it is required that the stiffness value of the second stiffness spring 39 is not less than ten times the stiffness value of the first stiffness spring 24; if the stiffness values of the first rate spring 24 and the second rate spring 39 are related to the amount of deformation thereof, it is required that the minimum stiffness of the second rate spring 39 is not less than ten times the maximum stiffness value of the first rate spring 24.
Preferably, the lifting assembly includes a linear guide 21 mounted on the protective cover, a lifting slider 22 mounted on the linear guide 21, a U-shaped plate 23 mounted on the lifting slider 22, and a lifting plate 25 mounted between the vibration isolation platform 10 and the first stiffness spring 24.
Preferably, the protective trigger assembly includes a rate ramp A27 and a rate ramp B28 mounted on the upper end of the U-shaped plate 23, and a spring protective sleeve 26 mounted over the first rate spring 24. On one hand, the stiffness jump plate A27 and the stiffness jump plate B28 can effectively prevent the first stiffness spring 24 from being too large in tensile deformation, on the other hand, the stiffness of the vibration isolation system can be switched from the first stiffness to the second stiffness when the vibration isolation platform 10 moves upwards to a certain position, and simultaneously the stiffness driving damping mechanism is triggered, so that the damping adaptive mechanism generates damping, and the impact energy absorption effect is improved. In this embodiment, the spring protection sleeve 26 is sleeved on the lower end of the first stiffness spring 24, as a variation of the present invention, the spring protection sleeve 26 may be installed on the side of the first stiffness spring 24, as long as the lifting plate 25 is located at the middle between the stiffness bump a27 and the spring protection sleeve 26 when the lifting plate 25 is at rest, so as to ensure that the distances that the lifting plate 25 moves downwards to touch the spring protection sleeve 26 and moves upwards to touch the stiffness bump a27 are equal.
Preferably, the damping adaptive mechanism comprises a translational damping plate 33 capable of moving in the horizontal direction, a descending pressure assembly capable of applying variable pressure to the translational damping plate 33 downwards, and an ascending pressure assembly capable of applying variable pressure to the translational damping plate 33 upwards. The translational damping plate 33 is made of non-metal materials, and the upper surface and the lower surface of the translational damping plate are provided with positive corrugated grooves, so that the friction force of the pressure slide block A32 and the pressure slide block B35 is increased. When the damping self-adaptive mechanism works, the larger the downward movement distance of the vibration isolation platform 10 is, the larger the pressure and friction damping force generated by the descending pressure assembly on the translational damping plate 33 is; the greater the distance that the isolation platform 10 moves upward, the greater the pressure and frictional damping force that the riser pressure assembly generates on the translational damping plate 33.
Preferably, the pressure-dropping assembly comprises a pressure slide block B35 in sliding contact with the upper end surface of the translational damping plate 33, and a lifting positioning plate B37 fixedly arranged on the protective sleeve and only allowing the pressure slide block B35 to move downwards; the ascending pressure assembly comprises a pressure slide block A32 in sliding contact with the lower end face of the translational damping plate 33, a lifting positioning plate A31 fixedly connected with the protective sleeve and slidably sleeved on the pressure slide block A32, and a pressure-resistant balance spring 36 arranged between the pressure slide block A32 and the protective sleeve along the vertical direction; the upper end of the pressure-resisting balance spring 36 is abutted against the lower surface of the pressure slide block A32; the stiffness of the pressure-resisting balance spring 36 is not less than ten times the stiffness of the second rate spring 39 so that the pressure slider a32 does not move downward during vibration isolation. The pressure slide block A32 and the pressure slide block B35 are made of elastic non-metallic materials, and the surface which is in contact with the translational damping plate 33 is provided with reverse corrugated grooves. In the embodiment, a counter bore for placing the pressure slider B35 is formed in the bottom surface of the lifting positioning plate B37, so that when the pressure slider B35 tends to move upwards, the counter bore bottom of the lifting positioning plate B37 can prevent the pressure slider B35 from moving upwards, and when the pressure slider B35 tends to move downwards, the lifting positioning plate B37 can allow the pressure slider B37 to slightly displace downwards, so as to increase the damping force of the pressure slider B35. In the embodiment, the lower end of the second stiffness spring 39 is connected with a flexible rope 34, the other end of the flexible rope 34 passes through a through hole formed in the pressure slider B35 and a wire passing hole 330 formed in the translational damping plate 33 and is connected with the pressure slider a32, when the U-shaped plate 23 moves upwards, the second stiffness spring 39 gradually extends, and the pressure slider a32 is pulled upwards through the flexible rope 34, so that the spring tension in the second stiffness spring 39 is transmitted to the translational damping plate 33, and the translational damping plate 33 generates damping force when moving left and right.
Preferably, the stiffness driving damping mechanism comprises a composite gear A which is arranged on the protective sleeve by adopting a support A41, a composite gear B which is arranged on the protective sleeve by adopting a support B47, a transmission chain for realizing the rotation transmission between the composite gear A and the composite gear B, and a horizontal rack 38 which is arranged on the damping self-adaptive mechanism and is in meshing transmission with the composite gear B; the left end of the horizontal rack 38 is fixedly connected with the translational damping plate 33, and the composite gear A is in meshing transmission with the U-shaped plate 23.
Preferably, compound gear a includes gear a42 and gear B43 mounted for coaxial synchronous rotation, and compound gear B includes gear C44 and gear D45 mounted for coaxial synchronous rotation. In this embodiment, the outer wall of the right side of the U-shaped plate 23 is provided with engaging teeth engaged with the gear a42, and when the U-shaped plate 23 is lifted, the composite gear a composed of the gear a42 and the gear B43 will rotate clockwise and counterclockwise, respectively. In the embodiment, the gear A42 is in meshing transmission with the U-shaped plate 23, the gear B43 is in transmission connection with the gear C44 through the equidirectional transmission chain 46, and the gear D45 is in meshing transmission with the horizontal rack 38. In other embodiments, gear B43 and gear C44 may be connected by a reverse drive chain.
The working principle of the invention is as follows: the equipment to be vibration isolated is mounted on the vibration isolation platform 10 of the present invention. When the vibration-isolated equipment is subjected to smaller external vibration acting force, the vibration-isolated platform 10 drives the lifting plate 25 to move up and down relative to the U-shaped plate 23, and as the rigidity of the second rigidity spring 39 is far greater than that of the first rigidity spring 24, before the lifting plate 25 touches the rigidity jump plate A27 or the spring protective sleeve 26, the U-shaped plate 23 is almost static and different, namely the translational damping plate 33 is static and motionless, and the whole system is in a small-rigidity undamped state in the process; when the vibration isolation platform 10 is subjected to a large impact force, the lifting plate 25 is significantly displaced, so that the lifting plate touches the spring protection sleeve 26 downwards or touches the rigidity protruding spring plate A27 and the rigidity protruding spring plate B28 upwards, and the U-shaped plate 23 is driven to move downwards or upwards together.
When the lifting plate 25 and the U-shaped plate 23 move downwards together, the gear A42 meshed with the right side wall of the U-shaped plate 23 rotates anticlockwise, and then drives the gear B43, the homodromous transmission chain 46 and the gear C44 to rotate in sequence, and further drives the gear D45 to rotate anticlockwise, so that the horizontal rack 38 meshed with the gear D45 moves leftwards along the horizontal direction, and the horizontal rack 38 pushes the translational damping plate 33 to slide leftwards; the second stiffness spring 39 is compressed and deformed due to the downward movement of the U-shaped plate 23, and the second stiffness spring 39 presses the pressure slide B35 downwards, so that the pressure slide B35 generates damping friction force on the horizontal leftward movement translational damping plate 33; the larger the downward displacement of the U-shaped plate 23 is, the larger the pressure slider B35 exerts on the translational damping plate 33, and the larger the damping force for the translational damping plate 33 to move in the horizontal direction is.
When the lifting plate 25 pushes the rigidity jump board A27, the rigidity jump board B28 and the U-shaped plate 23 to move upwards together, the gear A42 meshed with the right side wall of the U-shaped plate 23 rotates clockwise, the gear B43, the homodromous transmission chain 46 and the gear C44 are sequentially driven to rotate, and the gear D45 is driven to rotate clockwise, so that the horizontal rack 38 meshed with the gear D45 moves rightwards along the horizontal direction, and the horizontal rack 38 pulls the translational damping plate 33 to slide rightwards; the U-shaped plate 23 moves upwards, so that the second stiffness spring 39 is subjected to stretching deformation, the second stiffness spring 39 pulls the flexible rope 34 upwards, the flexible rope 34 pulls the pressure slider A32 upwards, and therefore the pressure slider A32 generates damping friction force on the translational damping plate 33 moving horizontally to the right; the larger the upward displacement of the U-shaped plate 23 is, the larger the tensile deformation of the second rate spring 39 is, the larger the upward pressure of the pressure slider a32 on the translational damping plate 33 is, and the larger the damping force of the translational damping plate 33 moving in the horizontal direction is.
The rigid body of the present invention is characterized as follows: referring to fig. 2, for convenience of description, it is not specified that the downward movement direction of the vibration isolation platform 10 is a positive displacement direction, and the opposite direction is a negative displacement direction. Therefore, when the elevating plate 25 moves downward or upward, the displacement is X or less1The stiffness of the system is equal to the stiffness K of the first rate spring 241(ii) a When the downward or upward displacement of the lifting plate 25 is larger than X1The stiffness of the system is equal to the stiffness K of the second rate spring 392. Thus, the stiffness curve of the inventive isolator system consists of three horizontal line segments, namely, when-X2≤X≤-X1The stiffness of the system is K2(ii) a when-X1≤X≤X1The stiffness of the system is K1(ii) a When X is present1≤X≤X2The stiffness of the system is K2。
The damping characteristics of the invention are as follows: referring to fig. 3, when the displacement of the lifting plate 25 moving downwards or upwards is less than or equal to X1, that is, the rigidity of the system is K1Due to translationThe damping plate 33 has no displacement with respect to the pressure slide a32 and the pressure slide B35, so the damping force of the system is zero; when the downward or upward displacement of the lifting plate 25 is larger than X1When, i.e. the stiffness of the system is degree K2Since the friction force applied to the translational damping plate 33 is proportional to the pressure of the second rate spring 39, the damping force of the system can be increased from zero to the maximum value Fmax. Therefore, the damping force F is a vertical line segment in the graph of the damping force versus stiffness, and two lines of the damping force act to form a barrier against a large impact force if viewed from the displacement amount of the up-and-down movement of the elevating plate 25.
The above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of through creative efforts should fall within the scope of the present invention.
Claims (5)
1. The utility model provides a damped isolator that shocks resistance of rigidity kick excitation coupling, includes the protective sheath for the installation is by vibration isolation platform (10) of vibration isolation equipment, its characterized in that: further comprising:
the stiffness snap-through mechanism is arranged in the protective sleeve, is connected with the vibration isolation platform (10) and is used for changing the lifting motion stiffness of the vibration isolation platform (10);
the damping self-adaptive mechanism is arranged in the protective sleeve and is used for generating variable damping and absorbing surplus impact energy;
the rigidity driving damping mechanism is arranged between the rigidity sudden jump mechanism and the damping self-adaptive mechanism and is used for exciting damping force after rigidity sudden jump;
the stiffness snap-through mechanism comprises a lifting assembly arranged on the protective sleeve, a first stiffness spring (24) arranged between the lifting assembly and the vibration isolation platform (10), a second stiffness spring (39) arranged between the lifting assembly and the damping self-adaptive mechanism, and a protection triggering assembly used for protecting the first stiffness spring (24) and triggering stiffness snap-through; the stiffness value of the second stiffness spring (39) is greater than the stiffness value of the first stiffness spring (24);
the lifting assembly comprises a linear guide rail (21) arranged on the protective sleeve, a lifting slider (22) arranged on the linear guide rail (21), a U-shaped plate (23) arranged on the lifting slider (22), and a lifting plate (25) arranged between the vibration isolation platform (10) and the first stiffness spring (24);
the damping self-adaptive mechanism comprises a translation damping plate (33) capable of moving in the horizontal direction, a descending pressure component capable of applying variable pressure to the translation damping plate (33) downwards, and an ascending pressure component capable of applying variable pressure to the translation damping plate (33) upwards;
the rigidity driving damping mechanism comprises a composite gear A which is arranged on the protective sleeve by adopting a support A (41), a composite gear B which is arranged on the protective sleeve by adopting a support B (47), a transmission chain for realizing the rotation transmission between the composite gear A and the composite gear B, and a horizontal rack (38) which is arranged on the damping self-adaptive mechanism and is engaged with the composite gear B for transmission; the left end of the horizontal rack (38) is fixedly connected with the translational damping plate (33), and the composite gear A is in meshing transmission with the U-shaped plate (23).
2. The shock-resistant vibration isolator with the kick-rate excitation coupling damping function according to claim 1, wherein the shock-rate excitation coupling damping function comprises the following components in percentage by weight: the protection triggering assembly comprises a rigidity jump board A (27) and a rigidity jump board B (28) which are arranged at the upper end of the U-shaped board (23), and a spring protection sleeve (26) sleeved on the first rigidity spring (24).
3. The shock-resistant vibration isolator with the kick-rate excitation coupling damping function according to claim 1, wherein the shock-rate excitation coupling damping function comprises the following components in percentage by weight: the descending pressure assembly comprises a pressure slide block B (35) in sliding contact with the upper end face of the translation damping plate (33), and a lifting positioning plate B (37) which is fixedly arranged on the protective sleeve and only allows the pressure slide block B (35) to move downwards; the ascending pressure assembly comprises a pressure sliding block A (32) in sliding contact with the lower end face of the translation damping plate (33), a lifting positioning plate A (31) fixedly connected with the protective sleeve and slidably sleeved on the pressure sliding block A (32), and a pressure-resistant balance spring (36) arranged between the pressure sliding block A (32) and the protective sleeve along the vertical direction.
4. The shock-resistant vibration isolator with the kick-rate excitation coupling damping function according to claim 1, wherein the shock-rate excitation coupling damping function comprises the following components in percentage by weight: the compound gear A comprises a gear A (42) and a gear B (43) which are coaxially and synchronously rotatably arranged, and the compound gear B comprises a gear C (44) and a gear D (45) which are coaxially and synchronously rotatably arranged; the gear A (42) is in meshing transmission with the U-shaped plate (23), the gear B (43) is in transmission connection with the gear C (44) through a homodromous transmission chain (46), and the gear D (45) is in meshing transmission with the horizontal rack (38).
5. The shock-resistant vibration isolator with the kick-rate excitation coupling damping function according to claim 1, wherein the shock-rate excitation coupling damping function comprises the following components in percentage by weight: the stiffness value of the second stiffness spring (39) is not less than ten times the stiffness value of the first stiffness spring (24).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116201846A (en) * | 2023-05-05 | 2023-06-02 | 溧阳常大技术转移中心有限公司 | Metal vibration isolator with damping force jumping along with displacement |
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| JP2004035163A (en) * | 2002-07-02 | 2004-02-05 | Mitsubishi Electric Corp | Guiding device for elevator |
| US20160088227A1 (en) * | 2014-09-19 | 2016-03-24 | Canon Kabushiki Kaisha | Vibration type actuator, optical device, and image pickup apparatus |
| CN106499764A (en) * | 2016-11-22 | 2017-03-15 | 常州大学 | A kind of rigidity is mutated impact resisting vibrating antivibrator |
| CN108678741A (en) * | 2018-05-07 | 2018-10-19 | 山东工商学院 | A kind of coal mining percussion mechanism |
| CN210222650U (en) * | 2019-08-26 | 2020-03-31 | 武汉德创天成科技发展有限公司 | Computer machine case protector |
| CN113266662A (en) * | 2021-06-23 | 2021-08-17 | 常州大学 | Rigidity mutation type vibration isolator with rigidity increasing along with displacement increase |
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| CN116201846A (en) * | 2023-05-05 | 2023-06-02 | 溧阳常大技术转移中心有限公司 | Metal vibration isolator with damping force jumping along with displacement |
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