CN114321270A - Variable parameter rubber shock absorber for inertial measurement unit - Google Patents
Variable parameter rubber shock absorber for inertial measurement unit Download PDFInfo
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- CN114321270A CN114321270A CN202111441037.4A CN202111441037A CN114321270A CN 114321270 A CN114321270 A CN 114321270A CN 202111441037 A CN202111441037 A CN 202111441037A CN 114321270 A CN114321270 A CN 114321270A
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- 230000035939 shock Effects 0.000 title claims abstract description 40
- 239000006096 absorbing agent Substances 0.000 title claims abstract description 29
- 238000005259 measurement Methods 0.000 title claims abstract description 25
- 230000007246 mechanism Effects 0.000 claims abstract description 8
- 238000013016 damping Methods 0.000 claims description 55
- 238000004026 adhesive bonding Methods 0.000 claims description 6
- 238000010030 laminating Methods 0.000 claims description 2
- 230000006835 compression Effects 0.000 claims 2
- 238000007906 compression Methods 0.000 claims 2
- 239000003292 glue Substances 0.000 claims 1
- 238000009434 installation Methods 0.000 abstract description 12
- 238000010521 absorption reaction Methods 0.000 abstract description 6
- 230000003068 static effect Effects 0.000 description 13
- 230000005284 excitation Effects 0.000 description 11
- 230000008859 change Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 230000006872 improvement Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002708 enhancing effect 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
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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Abstract
The invention discloses a variable parameter rubber shock absorber for an inertial measurement unit, which comprises a base and an installation support, wherein the installation support is connected with the base in a manner of moving close to and away from the base through a guide mechanism, a first rubber shock absorption piece compressed by the installation support when the installation support moves close to the base is installed on the base, a second rubber shock absorption piece is also installed on the base, a distance is reserved between the second rubber shock absorption piece and the installation support, and the installation support is contacted with the second rubber shock absorption piece and compresses the second rubber shock absorption piece when the installation support moves close to the base and the distance between the installation support and the base is smaller than a preset distance. The variable parameter rubber shock absorber for the inertial measurement unit has the advantages of simple structure, low cost, easiness in popularization and implementation, good adaptability to the mechanical environment, capability of improving the navigation precision of the inertial measurement 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 unit can be exposed to severe mechanical environments such as random vibration, overload, impact and the like on the missile, and the static and dynamic mechanical adaptability of the inertial unit directly influences the working precision of an inertial device, so that the navigation precision of the inertial device is influenced. In order to reduce adverse effects brought by an external mechanical environment, vibration isolation is generally carried out by using a vibration absorber, and a vibration absorption system meeting the assessment requirements of the static and dynamic environment is designed according to performance indexes of an inertial measurement unit and self structural parameters. The design and the selection of the shock absorber are important links of the structural design of the inertial measurement unit, and the shock absorber with reasonable design has extremely important significance for enhancing the mechanical environment adaptability of the inertial measurement unit and improving the navigation precision of the inertial measurement unit.
Inertial sensors (gyroscopes, accelerometers, etc.) in the inertial measurement unit are susceptible to interference from mechanical environments such as vibration, and the interference is one of factors constituting navigation errors of the inertial measurement unit, and the inertial measurement unit isolates force or amplitude transmitted from a vibration source to an inertial device through a vibration absorber. Through consulting documents and market research and analysis, most of the conventional vibration absorbers adopt rubber vibration absorbers, after the rubber vibration absorbers in conventional design are molded through a mold, the parameters such as static rigidity and damping are basically determined and change very little with the external excitation magnitude, the adaptability to full-magnitude mechanical excitation is poor, and the requirements of the inertia absorbers on the static rigidity and the damping parameters are inconsistent under the mechanical environments with small magnitude and large magnitude, so that the parameters such as the static rigidity and the damping of the conventional vibration absorbers cannot be adaptively adjusted along with the change of the excitation magnitude, and the adaptability to the mechanical environment is poor.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects in the prior art and provides the variable parameter rubber shock absorber for the inertial set, which has the advantages of simple structure, low cost, easy popularization and implementation, good adaptability to the mechanical environment and capability of improving the navigation precision of the inertial set.
In order to solve the technical problems, the invention adopts the following technical scheme:
the variable parameter rubber shock absorber for the inertial measurement unit comprises a base and a mounting support, wherein the mounting support is connected with the base in a mode of being close to and far away from the base through a guide mechanism, a first rubber shock absorbing piece compressed by the mounting support when the mounting support moves close to the base is mounted on the base, a second rubber shock absorbing piece is further mounted on the base, a distance is reserved between the second rubber shock absorbing piece and the mounting support, and the mounting support contacts with the second rubber shock absorbing piece and compresses the second rubber shock absorbing piece when the mounting support moves close to the base and the distance between the mounting support and the base is smaller than a preset distance.
As a further improvement of the above technical solution:
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 in the guide cylinder and is in guide fit with the guide cylinder.
The first rubber vibration damper is fixedly installed in the guide cylinder.
The first rubber vibration damping piece, the opening end of the guide cylinder far away from the mounting bracket and the side face of the base far away from the mounting bracket are parallel and level to each other.
The first rubber vibration damping piece is fixedly installed in the guide cylinder in a gluing mode, and the guide rod is fixedly glued with the first rubber vibration damping piece.
The mounting bracket is provided with a threaded hole which is used for being matched with a screw to connect and fix the inertial measurement unit on the mounting bracket, and the central line of the threaded hole is superposed with the central line of the guide rod.
The base is provided with a fastener mounting hole for penetrating a fastener.
The second rubber damping piece is established for the cover the outside rubber sleeve of guide cylinder, the surface of rubber sleeve is the toper face, the diameter of toper face is crescent to the direction of base along the installing support, just the rubber sleeve corresponding to the big footpath of toper face end with the base laminating.
The second rubber vibration damping piece has the contact site that is used for with the installing support contact, the contact site is equipped with the cover and establishes the fender hole of keeping outside and forming the fender of keeping to the guide bar and holding at the guide bar.
The second rubber vibration damping piece and the guide cylinder as well as the second rubber vibration damping piece and the base are fixedly connected in a gluing mode.
Compared with the prior art, the invention has the advantages that:
the variable parameter rubber shock absorber for the inertial set can adaptively adjust different static stiffness and damping parameters according to the change of the external inertial excitation magnitude, can greatly improve the adaptability to the mechanical environment, and improves the navigation precision of the inertial set. And it has the advantages of simple structure, low cost and easy popularization and implementation.
Drawings
FIG. 1 is a schematic cross-sectional view of a variable parameter rubber damper for an inertial mass.
Illustration of the drawings:
1. a base; 11. a guide cylinder; 12. a fastener mounting hole; 2. mounting a bracket; 21. a guide bar; 22. a threaded hole; 3. a first rubber damper; 4. a second rubber damper; 41. a contact portion; 42. and a retaining hole.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples.
As shown in fig. 1, the variable parameter rubber shock absorber for inertial measurement unit of this embodiment includes a base 1 and a mounting bracket 2, the mounting bracket 2 is connected to the base 1 through a guide mechanism in a manner of being able to move close to and away from the base 1, a first rubber shock absorber 3 compressed by the mounting bracket 2 when the mounting bracket 2 moves close to the base 1 is installed on the base 1, a second rubber shock absorber 4 is also installed on the base 1, a distance is left between the second rubber shock absorber 4 and the mounting bracket 2, when the mounting bracket 2 moves close to the base 1 and the distance between the mounting bracket 2 and the base 1 is smaller than a preset distance, the mounting bracket 2 contacts with the second rubber shock absorber 4 and compresses the second rubber shock absorber 4. When the variable parameter rubber shock absorber for the inertial set is used, the inertial set is installed on the installation support 2, the base 1 is installed on a base used for installing the inertial set, when external excitation on the inertial set is small, the distance between the installation support 2 and the base 1 is larger than a preset distance, the installation support 2 is not in contact with the second rubber shock absorbing piece 4, only the first rubber shock absorbing piece 3 bears the force to absorb shock, and the mechanical property of the variable parameter rubber shock absorber is determined by the first rubber shock absorbing piece 3 and is in a small-magnitude working state. When the external excitation received by the inertial measurement unit is large and reaches a certain degree, the distance between the mounting support 2 and the base 1 is smaller than the preset distance, the mounting support 2 is in contact with the second rubber vibration damping piece 4 and compresses the second rubber vibration damping piece 4, the first rubber vibration damping piece 3 and the second rubber vibration damping piece 4 bear force together, and the mechanical property represented by the variable parameter rubber vibration damper is the coupling of the first rubber vibration damping piece 3 and the second rubber vibration damping piece 4 and is in a large-magnitude working state. The variable parameter rubber shock absorber for the inertial measurement unit can adaptively adjust different static stiffness and damping parameters according to the change of the external inertial excitation magnitude, can greatly improve the adaptability to a mechanical environment, and improves the navigation precision of the inertial measurement unit. And it has the advantages of simple structure, low cost and easy popularization and implementation.
In this embodiment, the guiding mechanism includes a guiding cylinder 11 disposed on the base 1 and a guiding rod 21 disposed 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 manufacture and assembly and stable and reliable motion of the mounting bracket 2.
In this embodiment, the first rubber damper 3 is fixedly mounted in the guide cylinder 11. The improvement of the structure compactness is facilitated, and the first rubber vibration damping piece 3 is stable and reliable in installation and stable in performance.
In this embodiment, the open end of installing support 2 is kept away from to first rubber damping piece 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 installed on the basis, first rubber damping piece 3 guaranteed stable damping effect with basic surface contact promptly to the assembly of first rubber damping piece 3 is simple and convenient. In other embodiments, a sealing plate may be used to close the opening end of the guide cylinder 11 away from the mounting bracket 2, and the first rubber damper 3 abuts against the sealing plate.
In this embodiment, the first rubber vibration damping member 3 is fixedly mounted in the guide cylinder 11 by means of gluing, so that the first rubber vibration damping member 3 and the guide cylinder 11 are connected into a stable assembly, the guide rod 21 is fixedly glued to the first rubber vibration damping member 3, so that the first rubber vibration damping member 3, the guide cylinder 11 and the guide rod 21 are connected into a stable assembly, and the guide rod 21 does not move. Of course, in other embodiments, the guide rod 21 and the first rubber vibration damper 3 may be fixed without being glued, and they may be in direct contact.
In this embodiment, the mounting bracket 2 is provided with a threaded hole 22 for being matched with a screw to connect and fix the inertial measurement unit on the mounting bracket 2, and a center line of the threaded hole 22 coincides with a center line of the guide rod 21. After the screw is matched with the threaded hole 22 to fixedly connect 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 a fastener mounting hole 12 for passing a fastener. It is convenient to mount the base 1 to a foundation.
In this embodiment, the second rubber vibration damping member 4 is a rubber sleeve sleeved outside the guide cylinder 11, the outer surface of the rubber sleeve is a tapered surface, the diameter of the tapered 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 tapered surface is attached to the base 1. After the mounting bracket 2 starts to compress the second rubber vibration damping part 4, the static rigidity and the damping performance of the second rubber vibration damping part 4 with the structural form can be increased along with the increase of external excitation, so that the vibration damping requirements under a large number of levels of external excitation are met, the adaptability is further improved, and the static rigidity and the damping performance are changed stably.
In this 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 retaining hole 42 that is fitted around the outside of the guide rod 21 and that retains the guide rod 21. The stability of the motion of the mounting bracket 2 can be improved, the mounting stability of the second rubber vibration damping piece 4 is improved, and the improvement of the compactness of the whole structure of the variable parameter rubber vibration damper is facilitated. When the protection hole 42 is adopted to be sleeved outside the guide rod 21 to form protection, preferably, the guide rod 21 and the first rubber vibration damping part 3 are not glued and fixed, the guide rod 21 and the first rubber vibration damping part 3 are only contacted with each other, and the assembly and the motion stability of the mounting bracket 2 are ensured by utilizing the protection hole 42.
In this embodiment, the second rubber vibration damping member 4 and the guide cylinder 11, and the second rubber vibration damping member 4 and the base 1 are connected and fixed in a gluing manner. The second rubber vibration damper 4 is connected with the base 1 to form a stable assembly.
The variable parameter rubber shock absorber for the inertial group can change the mechanical performance parameters such as static rigidity, damping and the like by changing the external dimensions and material parameters of the first rubber shock absorbing part 3 and the second rubber shock absorbing part 4, can change the static rigidity change condition when being excited by the outside by changing the conical surface taper of the second rubber shock absorbing part 4, and can be specifically designed and determined according to practical application occasions and requirements. When the external excitation magnitude is small, the good vibration damping effect generally requires that the static stiffness of the vibration damper is small, and when the external excitation magnitude is large, the static stiffness of the vibration damper needs to be large to improve the mechanical bearing performance of the vibration damper, so that the hardness of the first rubber vibration damping part 3 is smaller than that of the second rubber vibration damping part 4.
The variable parameter rubber shock absorber for the inertial measurement unit can be disassembled for unlimited times without influencing the shock absorbing effect. The vibration damping system can be used for a vibration damping system of an inertial measurement unit, can be popularized to military fields such as airplanes, naval vessels and combat vehicles, and civil fields such as automobiles, buildings and engineering machinery, and has wide application prospect.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-described embodiments. Modifications and variations that may occur to those skilled in the art without departing from the spirit and scope of the invention are to be considered as within the scope of the invention.
Claims (10)
1. A variable parameter rubber shock absorber for an inertial measurement unit is characterized in that: including base (1) and installing support (2), installing support (2) are close to and keep away from through guiding mechanism base (1) motion's mode with base (1) links to each other, install on base (1) and be close to base (1) when installing support (2) move by first rubber damping piece (3) of installing support (2) compression, still install second rubber damping piece (4) on base (1), leave the interval between second rubber damping piece (4) and installing support (2), installing support (2) are close to base (1) motion and installing support (2) and base (1) between the interval be less than when predetermineeing the distance installing support (2) with second rubber damping piece (4) contact and compression second rubber damping piece (4).
2. The variable parameter rubber damper for an inerter set of claim 1, wherein: 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).
3. The variable parameter rubber damper for an inerter set of claim 2, wherein: the first rubber vibration damper (3) is fixedly arranged in the guide cylinder (11).
4. The variable parameter rubber damper for an inerter set of claim 3, wherein: the first rubber vibration damping piece (3), the opening end of the guide cylinder (11) far away from the mounting bracket (2) and the side face of the base (1) far away from the mounting bracket (2) are mutually flush.
5. The variable parameter rubber damper for an inerter set of claim 3, wherein: first rubber damping piece (3) adopt the mode of gluing fixed mounting in guide cylinder (11), guide bar (21) with first rubber damping piece (3) glue to be fixed.
6. The variable parameter rubber damper for an inerter set of claim 2, wherein: the installing support (2) is provided with a threaded hole (22) used for being matched with a screw to connect and fix the inertial measurement unit on the installing support (2), and the central line of the threaded hole (22) is superposed with the central line of the guide rod (21).
7. The variable parameter rubber damper for an inerter set of claim 2, wherein: the base (1) is provided with a fastener mounting hole (12) for passing through a fastener.
8. The variable parameter rubber damper for an inertial set according to any one of claims 2 to 7, characterized in that: second rubber damping piece (4) are established for the cover the outside rubber sleeve of guide cylinder (11), the surface of rubber sleeve is the toper face, the diameter of toper face is crescent along installing support (2) to the direction of base (1), just the rubber sleeve corresponding to the terminal surface of toper face big footpath end with base (1) laminating.
9. The variable parameter rubber damper for an inerter set of claim 8, wherein: the second rubber vibration damper (4) is provided with a contact part (41) which is used for being in contact with the mounting bracket (2), and the contact part (41) is provided with a protecting and holding hole (42) which is sleeved outside the guide rod (21) and used for protecting and holding the guide rod (21).
10. The variable parameter rubber damper for an inerter set of claim 8, wherein: the second rubber vibration damping piece (4) is fixedly connected with the guide cylinder (11) and the second rubber vibration damping piece (4) is fixedly connected with the base (1) 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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| CN114321270A true CN114321270A (en) | 2022-04-12 |
| CN114321270B CN114321270B (en) | 2024-05-28 |
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| CN114321270B (en) | 2024-05-28 |
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