CN114321270B - Variable parameter rubber shock absorber for inertial mass - Google Patents
Variable parameter rubber shock absorber for inertial mass Download PDFInfo
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- CN114321270B CN114321270B CN202111441037.4A CN202111441037A CN114321270B CN 114321270 B CN114321270 B CN 114321270B CN 202111441037 A CN202111441037 A CN 202111441037A CN 114321270 B CN114321270 B CN 114321270B
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- vibration reduction
- rubber vibration
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- 239000006096 absorbing agent Substances 0.000 title claims abstract description 20
- 230000035939 shock Effects 0.000 title claims abstract description 17
- 230000007246 mechanism Effects 0.000 claims abstract description 8
- 230000009467 reduction Effects 0.000 claims description 35
- 238000004026 adhesive bonding Methods 0.000 claims description 5
- 230000001681 protective effect Effects 0.000 claims description 5
- 238000005259 measurement Methods 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000013016 damping Methods 0.000 description 21
- 230000003068 static effect Effects 0.000 description 13
- 230000005284 excitation Effects 0.000 description 11
- 230000008859 change Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000009434 installation Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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- Vibration Prevention Devices (AREA)
Abstract
The invention discloses a variable parameter rubber shock absorber for an inertial unit, which comprises a base and a mounting bracket, wherein the mounting bracket is connected with the base in a mode of moving close to and away from the base through a guide mechanism, a first rubber shock absorbing piece compressed by the mounting bracket when the mounting bracket moves close to the base is arranged on the base, a second rubber shock absorbing piece is also arranged on the base, a space is reserved between the second rubber shock absorbing piece and the mounting bracket, and the mounting bracket contacts with the second rubber shock absorbing piece and compresses the second rubber shock absorbing piece when the mounting bracket moves close to the base and the space between the mounting bracket and the base is smaller than a preset distance. The variable parameter rubber vibration damper for the inertial unit has the advantages of simple structure, low cost, easy popularization and implementation, good adaptability to mechanical environment, capability of improving navigation precision of the inertial unit and the like.
Description
Technical Field
The invention relates to the technical field of inertial measurement units, in particular to a variable parameter rubber shock absorber for an inertial measurement unit.
Background
The inertial component can face severe mechanical environments such as random vibration, overload and impact on the bullet, and the static and dynamic mechanical adaptability of the inertial component directly influences the working precision of an inertial device, so that the navigation precision of the inertial component is influenced. In order to reduce adverse effects caused by external mechanical environment, vibration isolation is generally performed through a vibration absorber, and a vibration reduction system meeting the static and dynamic environment assessment requirements is designed according to performance indexes and self structural parameters of an inertial unit. The design and the selection of the shock absorber are important links of the structure design of the inertial unit, and the shock absorber with reasonable design has extremely important significance for enhancing the mechanical environment adaptability of the inertial unit and improving the navigation precision of the inertial unit.
Inertial sensors (gyroscopes, accelerometers, etc.) in an inertial mass are subject to mechanical environmental disturbances such as vibration, and this disturbance is one of the factors that make up the inertial mass navigation error, which isolates the force or amplitude of the vibration source transmitted to the inertial device through the shock absorber. By consulting literature and market research analysis, most of the conventional rubber vibration absorbers are adopted on the conventional inertial unit, after the conventional designed rubber vibration absorbers are molded by a die, parameters such as static rigidity and damping are basically determined, the variation of the parameters along with the external excitation level is very small, the adaptability to the mechanical excitation of the whole level is poor, and the requirements of the inertial unit on the static rigidity and damping parameters of the vibration absorbers under the mechanical environment of the small level and the large level are inconsistent, so that the parameters such as the static rigidity and the damping of the conventional vibration absorbers cannot be adaptively adjusted along with the variation of the excitation level, and the mechanical environment adaptability is poor.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the variable parameter rubber shock absorber for the inertial unit, which has the advantages of simple structure, low cost, easy popularization and implementation, good adaptability to mechanical environment and capability of improving the navigation precision of the inertial unit.
In order to solve the technical problems, the invention adopts the following technical scheme:
The utility model provides a variable parameter rubber shock absorber for group of inertia, includes base and installing support, the installing support pass through guiding mechanism with can be close to and keep away from the mode of base motion with the base links to each other, install on the base and be close to the first rubber damping spare of installing support compression when the base motion by the installing support, still install the second rubber damping spare on the base, leave the interval between second rubber damping spare and the installing support, the installing support is close to the base motion and when interval is less than the default distance between installing support and the base the installing support with second rubber damping spare contact and compress second rubber damping spare.
As a further improvement of the above technical scheme:
the guide mechanism comprises a guide cylinder arranged on the base and a guide rod arranged on the mounting bracket, and the guide rod is inserted into the guide cylinder and is in guide fit with the guide cylinder.
The first rubber vibration reduction piece is fixedly arranged in the guide cylinder.
The first rubber vibration reduction piece, the open end of the guide cylinder far away from the mounting bracket and the side surface of the base far away from the mounting bracket are flush with each other.
The first rubber vibration reduction piece is fixedly arranged in the guide cylinder in a gluing mode, and the guide rod is fixedly glued with the first rubber vibration reduction piece.
The mounting bracket is provided with a threaded hole which is matched with the screw to connect and fix the inertial unit on the mounting bracket, and the center line of the threaded hole coincides with the center line of the guide rod.
The base is provided with a fastener installation hole for penetrating through the fastener.
The second rubber vibration reduction piece is a rubber sleeve sleeved outside the guide cylinder, the outer surface of the rubber sleeve is a conical surface, the diameter of the conical surface gradually increases along the direction from the mounting bracket to the base, and the end surface of the rubber sleeve corresponding to the large-diameter end of the conical surface is attached to the base.
The second rubber vibration damper is provided with a contact part for contacting with the mounting bracket, and the contact part is provided with a protecting hole which is sleeved outside the guide rod and forms protecting for the guide rod.
The second rubber vibration reduction piece and the guide cylinder, and the second rubber vibration reduction piece and the base are connected and fixed in a cementing mode.
Compared with the prior art, the invention has the advantages that:
the variable parameter rubber shock absorber for the inertial unit can adaptively adjust different static stiffness and damping parameters according to the change of the external excitation level of the inertial unit, can greatly improve the adaptability to the mechanical environment and improve the navigation precision of the inertial unit. And the device has the advantages of simple structure, low cost and easy popularization and implementation.
Drawings
FIG. 1 is a schematic cross-sectional structural view of a variable parameter rubber damper for an inertial mass.
Legend description:
1. A base; 11. a guide cylinder; 12. a fastener mounting hole; 2. a mounting bracket; 21. a guide rod; 22. a threaded hole; 3. a first rubber vibration damper; 4. a second rubber vibration damper; 41. a contact portion; 42. and (5) protecting the hole.
Detailed Description
The invention is described in further detail below with reference to the drawings and the specific examples.
As shown in fig. 1, the variable parameter rubber damper for an inertial unit of the present embodiment includes a base 1 and a mounting bracket 2, the mounting bracket 2 is connected with the base 1 in a manner of being able to move close to and away from the base 1 by a guide mechanism, a first rubber damper 3 compressed by the mounting bracket 2 when the mounting bracket 2 moves close to the base 1 is mounted on the base 1, a second rubber damper 4 is also mounted on the base 1, a space is reserved between the second rubber damper 4 and the mounting bracket 2, the mounting bracket 2 moves close to the base 1, and the space between the mounting bracket 2 and the base 1 is smaller than a preset distance, and the mounting bracket 2 contacts with the second rubber damper 4 and compresses the second rubber damper 4. When the variable parameter rubber vibration damper for the inertial unit is used, the inertial unit is mounted on the mounting bracket 2, the base 1 is mounted on the base for mounting the inertial unit, when the inertial unit is subjected to smaller external excitation, the distance between the mounting bracket 2 and the base 1 is larger than a preset distance, the mounting bracket 2 is not contacted with the second rubber vibration damper 4, only the first rubber vibration damper 3 bears force to perform vibration damping, and at the moment, the mechanical property of the variable parameter rubber vibration damper is determined by the first rubber vibration damper 3 and is in a small-magnitude working state. When the external excitation of the inertial measurement unit is larger and reaches a certain degree, the distance between the mounting bracket 2 and the base 1 is smaller than the preset distance, the mounting bracket 2 is in contact with the second rubber vibration reduction piece 4 and compresses the second rubber vibration reduction piece 4, the first rubber vibration reduction piece 3 and the second rubber vibration reduction piece 4 bear force together, and at the moment, the variable parameter rubber vibration reduction device shows the mechanical property that the first rubber vibration reduction piece 3 and the second rubber vibration reduction piece 4 are coupled and are in a large-scale working state. The variable parameter rubber shock absorber for the inertial unit can adaptively adjust different static stiffness and damping parameters according to the change of the external excitation level of the inertial unit, can greatly improve the adaptability to the mechanical environment and improve the navigation precision of the inertial unit. And the device has the advantages of simple structure, low cost and easy popularization and implementation.
In this embodiment, the guiding mechanism includes a guiding cylinder 11 provided on the base 1 and a guiding rod 21 provided on the mounting bracket 2, and the guiding rod 21 is inserted into the guiding cylinder 11 and is in guiding fit with the guiding cylinder 11. The guide mechanism has the advantages of simple and compact structure, easy manufacturing and assembly and stable and reliable movement of the mounting bracket 2.
In this embodiment, the first rubber vibration damper 3 is fixedly installed in the guide cylinder 11. The structure compactness is improved, and the first rubber vibration reduction piece 3 is stable and reliable in installation and stable in performance.
In this embodiment, the open end that installing support 2 was kept away from to first rubber damping spare 3, guide cylinder 11 and the side that installing support 2 was kept away from to base 1 are parallel and level each other, and after base 1 was installed on the basis, first rubber damping spare 3 promptly contacted with the basis surface, guaranteed stable damping effect to the assembly of first rubber damping spare 3 is simple and convenient. In other embodiments, a sealing plate may be used to close the open end of the guide cylinder 11 away from the mounting bracket 2, against which the first rubber vibration damper 3 abuts.
In this embodiment, the first rubber vibration absorbing member 3 is fixedly installed in the guide cylinder 11 by adopting a cementing manner, so that the first rubber vibration absorbing member 3 and the guide cylinder 11 are connected into a stable assembly, the guide rod 21 and the first rubber vibration absorbing member 3 are fixedly cemented, so that the first rubber vibration absorbing member 3, the guide cylinder 11 and the guide rod 21 are connected into a stable assembly, and the guide rod 21 cannot move. Of course, in other embodiments, the guide rod 21 and the first rubber vibration damper 3 may be fixed without being glued, and may be in direct contact with each other.
In this embodiment, the mounting bracket 2 is provided with a threaded hole 22 for connecting and fixing the inertial unit to the mounting bracket 2 in cooperation with a screw, and the center line of the threaded hole 22 coincides with the center line of the guide rod 21. After the screw is adopted to be matched and connected with the threaded hole 22 to fix the inertial unit mounting bracket 2, the stress is balanced, and the vibration reduction effect is good.
In this embodiment, the base 1 is provided with fastener mounting holes 12 for passing fasteners. Facilitating the mounting of the base 1 to a foundation.
In this embodiment, the second rubber vibration absorbing member 4 is a rubber sleeve sleeved outside the guide cylinder 11, the outer surface of the rubber sleeve is a conical surface, the diameter of the conical surface gradually increases along the direction from the mounting bracket 2 to the base 1, and the end surface of the rubber sleeve corresponding to the large diameter end of the conical surface is attached to the base 1. After the mounting bracket 2 begins to compress the second rubber vibration reduction piece 4, the static rigidity and the damping performance of the second rubber vibration reduction piece 4 in the structural form can be increased along with the increase of external excitation, so that the vibration reduction requirement under the large-magnitude external excitation is more adapted, the adaptability is further improved, and the static rigidity and the damping performance are stable to change.
In the present embodiment, the second rubber damper 4 has a contact portion 41 for contacting the mounting bracket 2, and the contact portion 41 is provided with a holding hole 42 that is fitted over the outside of the guide rod 21 and holds the guide rod 21. The stability of the movement of the mounting bracket 2 can be improved, the mounting stability of the second rubber vibration damper 4 is improved, and the overall structural compactness of the variable parameter rubber vibration damper is improved. When the protective hole 42 is sleeved outside the guide rod 21 to form a protective effect, preferably, the guide rod 21 and the first rubber vibration reduction piece 3 are not fixed in a gluing way and are only in contact with each other, the protective hole 42 is used for ensuring the assembly and movement stability of the mounting bracket 2, and the mounting bracket 2 and the base 1 are convenient to assemble and disassemble and convenient to assemble and maintain in the assembly mode.
In this embodiment, the second rubber vibration absorbing member 4 and the guide cylinder 11, and the second rubber vibration absorbing member 4 and the base 1 are all fixed by gluing. The second rubber vibration damper 4 is connected with the base 1 to form a stable assembly.
The variable parameter rubber vibration damper for the inertial unit can change mechanical performance parameters such as static stiffness, damping and the like by changing the external dimensions and material parameters of the first rubber vibration damper 3 and the second rubber vibration damper 4, can change the static stiffness change condition when being excited by the outside by changing the taper of the taper surface of the second rubber vibration damper 4, and can be designed and determined specifically according to practical application occasions and requirements. Since the external excitation level is smaller, the good vibration reduction effect generally requires that the static rigidity of the vibration absorber is smaller, and when the external excitation level is larger, the static rigidity of the vibration absorber is required to be larger to improve the mechanical bearing performance of the vibration absorber, so that the hardness of the first rubber vibration reduction piece 3 is smaller than that of the second rubber vibration reduction piece 4.
The variable parameter rubber damper for the inertial unit can be disassembled infinitely, and the damping effect is not affected. The vibration damping system not only can be used for a vibration damping system of an inertial unit, but also can be popularized to military fields such as airplanes, ships, war chariot and the like, and civil fields such as automobiles, buildings, engineering machinery and the like, and has wide application prospect.
The above description is merely a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above examples. Modifications and variations which would be obvious to those skilled in the art without departing from the spirit of the invention are also considered to be within the scope of the invention.
Claims (6)
1. A variable parameter rubber damper for an inertial mass, characterized by: the device comprises a base (1) and a mounting bracket (2), wherein the mounting bracket (2) is connected with the base (1) in a mode of moving close to and away from the base (1) through a guide mechanism, a first rubber vibration reduction piece (3) compressed by the mounting bracket (2) when the mounting bracket (2) moves close to the base (1) is arranged on the base (1), a second rubber vibration reduction piece (4) is also arranged on the base (1), a space is reserved between the second rubber vibration reduction piece (4) and the mounting bracket (2), and when the mounting bracket (2) moves close to the base (1) and the space between the mounting bracket (2) and the base (1) is smaller than a preset distance, the mounting bracket (2) is in contact with the second rubber vibration reduction piece (4) and compresses the second rubber vibration reduction piece (4);
the guide mechanism comprises a guide cylinder (11) arranged on the base (1) and a guide rod (21) arranged on the mounting bracket (2), and the guide rod (21) is inserted into the guide cylinder (11) and is in guide fit with the guide cylinder (11);
The second rubber vibration reduction piece (4) is a rubber sleeve sleeved outside the guide cylinder (11), the outer surface of the rubber sleeve is a conical surface, the diameter of the conical surface is gradually increased along the direction of the mounting bracket (2) to the base (1), and the end surface of the rubber sleeve corresponding to the large-diameter end of the conical surface is attached to the base (1);
the second rubber vibration damper (4) is provided with a contact part (41) for contacting the mounting bracket (2), and the contact part (41) is provided with a protective hole (42) which is sleeved outside the guide rod (21) and forms a protective effect on the guide rod (21);
The first rubber vibration damper (3) is fixedly arranged in the guide cylinder (11).
2. A variable parameter rubber damper for an inertial mass according to claim 1, characterized in that: the first rubber vibration reduction piece (3) the open end that the installing support (2) was kept away from to guiding tube (11) and the side that installing support (2) was kept away from to base (1) are parallel and level each other.
3. A variable parameter rubber damper for an inertial mass according to claim 1, characterized in that: the first rubber vibration reduction piece (3) is fixedly arranged in the guide cylinder (11) in a gluing mode, and the guide rod (21) is fixedly glued with the first rubber vibration reduction piece (3).
4. A variable parameter rubber damper for an inertial mass according to claim 1, characterized in that: the mounting bracket (2) is provided with a threaded hole (22) which is used for being matched with a screw to connect and fix the inertial measurement unit on the mounting bracket (2), and the central line of the threaded hole (22) coincides with the central line of the guide rod (21).
5. A variable parameter rubber damper for an inertial mass according to claim 1, characterized in that: the base (1) is provided with a fastener mounting hole (12) for penetrating through a fastener.
6. A variable parameter rubber shock absorber for an inertial mass according to any of claims 1 to 5, characterized in that: the second rubber vibration reduction piece (4) and the guide cylinder (11), and the second rubber vibration reduction piece (4) and the base (1) are connected and fixed in a gluing mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111441037.4A CN114321270B (en) | 2021-11-30 | 2021-11-30 | Variable parameter rubber shock absorber for inertial mass |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111441037.4A CN114321270B (en) | 2021-11-30 | 2021-11-30 | Variable parameter rubber shock absorber for inertial mass |
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| Publication Number | Publication Date |
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| CN114321270A CN114321270A (en) | 2022-04-12 |
| CN114321270B true CN114321270B (en) | 2024-05-28 |
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| CN202111441037.4A Active CN114321270B (en) | 2021-11-30 | 2021-11-30 | Variable parameter rubber shock absorber for inertial mass |
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| CN114321270A (en) | 2022-04-12 |
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