CN115013478A - Shock absorber with precise positioning and anti-twisting functions - Google Patents
Shock absorber with precise positioning and anti-twisting functions Download PDFInfo
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- CN115013478A CN115013478A CN202210346165.9A CN202210346165A CN115013478A CN 115013478 A CN115013478 A CN 115013478A CN 202210346165 A CN202210346165 A CN 202210346165A CN 115013478 A CN115013478 A CN 115013478A
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- sleeve
- radial
- annular damping
- side wall
- circular ring
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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
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- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Mechanical Engineering (AREA)
- Vibration Dampers (AREA)
Abstract
The invention relates to an inertial group vibration absorber, in particular to a vibration absorber with functions of precise positioning and anti-twisting, and solves the defects that the existing inertial group vibration absorber is not easy to realize three-dimensional equal rigidity design, viscoelastic damping rubber is easy to break or degum under the action of external force, distance tolerance between an external mounting screw and a sleeve is easy to accumulate, and the viscoelastic damping rubber is twisted due to thread pair friction force generated during the mounting of the external mounting screw. This shock absorber with accurate positioning and prevent function of distorting includes mounting panel, sleeve, damping pad subassembly, first radial arch and the radial arch of second, wherein adopts the compact form to be connected between damping pad subassembly and all the other subassemblies, and first radial arch upper surface is provided with at least one guide beam, and the connecting plate lower surface in the mounting panel is provided with the holding ring.
Description
Technical Field
The invention relates to an inertial measurement unit shock absorber, in particular to a shock absorber with precise positioning and anti-twisting functions.
Background
The inertial unit is an important component of a spacecraft such as a carrier rocket and a satellite, and during the flight of the spacecraft, the inertial unit is influenced by various mechanical environment conditions such as external vibration and impact, so that the precision of the inertial unit is possibly reduced or the function of the inertial unit is lost, the flight precision of the spacecraft is influenced, serious quality accidents are caused, and in order to create a good working environment for the inertial unit and ensure the normal work of the inertial unit, a shock absorber is generally required to be designed and installed on the inertial unit.
The existing inertial group vibration absorber is shown in fig. 1, and comprises a sleeve 02, a mounting plate 01, and viscoelastic damping rubber 03 between the sleeve 02 and the mounting plate 01, wherein the sleeve 02 and the mounting plate 01 are metal pieces and are used for mounting and fixing the vibration absorber, usually, the mounting plate 01 is mounted on a component to be damped and buffered of the inertial group through two through holes, and the sleeve 02 is mounted on an external supporting structural member through a middle threaded hole; the viscoelastic damping rubber 03 is a functional material of the shock absorber, is used for isolating vibration and impact, creates a good working environment for the inertial unit, and ensures the normal work of the inertial unit.
The existing inertial measurement unit shock absorber has the following defects: (1) under the conditions of low-frequency vibration and large overload, large relative displacement exists between the vibration-damped and buffered assembly of the inertial unit and an external supporting structural member, and the viscoelastic damping rubber 03 of the vibration absorber is broken or degummed; (2) because the existing shock absorber is molded by injection molding, the integral structure is not easy to change, and the three-dimensional equal-rigidity design is not easy to realize through structural adjustment; (3) a gap exists between the screw and the mounting hole of the mounting plate 01, and under the condition that a plurality of shock absorbers are mounted and used, distance tolerance between the external mounting screw and the mounting hole of the sleeve 02 is accumulated, so that the external mounting screw cannot be mounted, or the external mounting screw is forcibly screwed to cause extrusion deformation of the viscoelastic damping rubber 03; (4) when the sleeve 02 is screwed into an external mounting screw, the thread pair friction force of the sleeve 02 drives the viscoelastic damping rubber 03 to twist, so that the external mounting screw cannot be fastened and cannot be detached when screwed out.
Disclosure of Invention
The invention aims to solve the defects that the existing inertial group vibration damper is not easy to realize three-way equal rigidity design, viscoelastic damping rubber is easy to break or degum under the action of external force, distance tolerance between an external mounting screw and a sleeve is easy to accumulate, and the viscoelastic damping rubber is distorted due to thread pair friction force generated during the mounting of the external mounting screw, and provides the vibration damper with precise positioning and anti-twisting functions.
In order to solve the defects existing in the prior art, the invention provides the following technical solutions:
a shock absorber with precise positioning and anti-twisting functions is characterized in that: the damping device comprises a mounting plate, a sleeve and a damping pad assembly;
the mounting plate comprises a circular ring and connecting plates symmetrically arranged at the bottom of the circular ring along the axis of the circular ring, connecting holes are formed in the connecting plates, and positioning rings protruding axially are arranged on the inner side of the lower surface of the connecting plates;
the sleeve is coaxially sleeved in the circular ring, and a first radial bulge and a second radial bulge are respectively arranged at the top and the bottom of the sleeve; at least one guide beam is arranged on the upper surface of the first radial protrusion along the radial direction of the sleeve;
the damping cushion assembly comprises a first annular damping cushion and a second annular damping cushion which are coaxially sleeved on the sleeve, and the axial sections of the first annular damping cushion and the second annular damping cushion are both of T-shaped structures; the first annular damping pad comprises a first horizontal part and a first vertical part, wherein the first horizontal part is abutted with the lower surface of the first radial bulge and the upper surface of the circular ring and is in contact with the outer side wall of the sleeve; the second annular damping pad comprises a second horizontal part which is abutted to the upper surface of the second radial bulge and the lower surface of the ring and is in contact with the outer side wall of the sleeve, and a second vertical part which is arranged on the upper part of the second horizontal part and is abutted to the inner side wall of the ring and the outer side wall of the sleeve.
Furthermore, the second radial protrusion and the sleeve are of an integral structure, the first radial protrusion is fixedly connected with the sleeve, and the first radial protrusion and the second radial protrusion are used for limiting the damping pad assembly, so that the shock absorber is of an integral structure.
Further, a gap exists between the first vertical portion of the first annular damping pad and the second vertical portion of the second annular damping pad, and three-way equal rigidity can be achieved by adjusting the length of the first vertical portion and the second vertical portion in the vertical direction.
Furthermore, the connecting plate comprises a cylinder arranged at the lower end of the circular ring and flanges symmetrically arranged at the lower end of the cylinder, and the flanges are provided with the connecting holes.
Furthermore, the outer side wall of the circular ring is a conical surface, and the area of the upper surface of the circular ring is smaller than that of the lower surface of the circular ring, so that the size and the weight of the circular ring are reduced.
Furthermore, the mounting plate, the sleeve, the first radial protrusion and the second radial protrusion are made of metal materials; the first annular damping cushion and the second annular damping cushion are made of viscoelastic damping rubber materials.
Compared with the prior art, the invention has the beneficial effects that:
(1) the invention relates to a shock absorber with precise positioning and anti-twisting functions, which comprises a mounting plate, a sleeve and a damping pad assembly, wherein the damping pad assembly is connected with other assemblies in a compression mode, so that the influence of bonding force on the performance of the shock absorber is avoided; and the working stress state of the damping pad assembly is changed from the original state of mainly bearing tensile force during working to completely bearing pressure, so that the problems of breakage and degumming of the shock absorber possibly caused by external force are solved, and the reliability of the shock absorber is improved.
(2) The invention relates to a shock absorber with precise positioning and anti-twisting functions, which is in an assembled type, wherein a damping pad assembly comprises a first annular damping pad and a second annular damping pad.
(3) According to the shock absorber with the precise positioning and anti-twisting functions, at least one guide beam is arranged on the upper surface of the first radial protrusion and is used for being matched with the guide groove on the external mounting support piece, the situation that the damping pad assembly is twisted in the mounting process of the shock absorber is avoided, and the performance stability of the shock absorber is ensured.
(4) The positioning ring is arranged on the lower surface of the connecting plate and used for being matched with the positioning hole in the vibration-isolated or buffering assembly of the inertial measurement unit, so that the mounting precision of the shock absorber is ensured, and the phenomenon that the performance stability of the shock absorber is influenced by the extrusion deformation of the damping pad assembly caused by the fact that an external mounting screw cannot be mounted due to the accumulation of distance tolerance or the external mounting screw is forcibly screwed in is avoided, and the technical indexes of the shock absorber are changed.
(5) The invention relates to a shock absorber with precise positioning and anti-twisting functions, wherein a first radial bulge and a second radial bulge are respectively arranged at the upper end and the lower end of a sleeve; the existing inertial measurement unit shock absorber is only provided with a radial bulge integrated with the sleeve at the upper end of the sleeve, and when viscoelastic damping rubber is broken or degummed, the shock absorber disassembly can cause the risk that the vibration-isolated and buffering assembly of the inertial measurement unit is separated from an external mounting support; in the present invention, the above-mentioned risk does not occur even if the first radial projection is separated from the sleeve.
Drawings
Fig. 1 is a schematic structural diagram of a conventional inertial group vibration absorber.
The reference numerals are explained below: 01-mounting plate; 02-a sleeve; 03-viscoelastic damping rubber.
FIG. 2 is a schematic structural view of an embodiment of a shock absorber with fine positioning and anti-twisting functions according to the present invention;
FIG. 3 is a schematic top view of an embodiment of the present invention;
fig. 4 is a schematic structural diagram after installation of the embodiment of the invention.
The reference numerals are illustrated below: 1-mounting plate, 11-circular ring, 12-connecting plate, 13-connecting hole and 14-positioning ring; 2-a sleeve; 3-damping pad assembly, 31-first annular damping pad, 32-second annular damping pad; 4-a first radial projection, 41-a guide beam; 5-a second radial projection; 6-an inertial measurement unit vibration isolation or buffer assembly, 61-a positioning hole; 7-external mounting support, 71-guide groove; 8-external mounting screws.
Detailed Description
The invention will be further described with reference to the drawings and exemplary embodiments.
Referring to fig. 2 to 4, a shock absorber with fine positioning and anti-twisting functions includes a mounting plate 1, a sleeve 2, and a damping pad assembly 3.
The mounting plate 1 comprises a circular ring 11 and connecting plates 12 symmetrically arranged at the bottom of the circular ring 11 along the axis of the circular ring 11; the outer side wall of the circular ring 11 is a conical surface, and the area of the upper surface of the circular ring 11 is smaller than that of the lower surface; the connecting plate 12 comprises a cylinder arranged at the lower part of the circular ring 11, a flange plate arranged at the lower part of the cylinder and a positioning ring 14 which is arranged at the lower part of the flange plate and axially protrudes; two connecting holes 13 are symmetrically arranged on the flange plate along the axis of the circular ring 11 and are used for being connected with the inertial unit vibration isolation or buffer assembly 6; the positioning ring 14 is used for matching with a positioning hole 61 on the inertial unit vibration isolation or buffer assembly 6, and the mounting accuracy of the vibration damper is guaranteed.
The sleeve 2 is coaxially sleeved in the circular ring 11, the top and the bottom of the sleeve 2 are respectively provided with a first radial protrusion 4 and a second radial protrusion 5, and the bottom surface of the second radial protrusion 5 is flush with the bottom surfaces of the two connecting plates 12. First radial arch 4 adopts the riveting mode to fix with sleeve 2, and second radial arch 5 and sleeve 2 structure as an organic whole, first radial arch 4, second radial arch 5 are used for spacing damping pad subassembly 3, make the shock absorber becomes overall structure. The inner side wall of the sleeve 2 and the inner side wall of the second radial protrusion 5 are both provided with threads, and an external mounting screw 8 penetrates through an external mounting support member 7 to be fixed with the sleeve 2 and the second radial protrusion 5. The upper surface of the first radial protrusion 4 is provided with two guide beams 41 along the radial direction of the sleeve 2, and the two guide beams 41 are symmetrically arranged along the axis of the sleeve 2 and are used for matching with the guide grooves 71 on the external mounting support 7, so that the situation that the damping pad assembly 3 is twisted in the mounting process of the shock absorber is avoided.
The damping pad assembly 3 comprises a first annular damping pad 31 and a second annular damping pad 32 which are coaxially sleeved on the sleeve 2, and the first annular damping pad 31 and the second annular damping pad 32 are both of T-shaped structures; the first annular damping pad 31 includes a first horizontal portion abutting against the lower surface of the first radial protrusion 4 and the upper surface of the ring 11 and contacting against the outer side wall of the sleeve 2, and a first vertical portion disposed at the lower portion of the first horizontal portion and abutting against the inner side wall of the ring 11 and the outer side wall of the sleeve 2, and the second annular damping pad 32 includes a second horizontal portion abutting against the upper surface of the second radial protrusion 5 and the lower surface of the ring 11 and contacting against the outer side wall of the sleeve 2, and a second vertical portion disposed at the upper portion of the second horizontal portion and abutting against the inner side wall of the ring 11 and the outer side wall of the sleeve 2. A gap exists between the first vertical part of the first annular damping pad 31 and the second vertical part of the second annular damping pad 32, and the three-way equal rigidity design of the shock absorber can be realized by adjusting the lengths of the first vertical part and the second vertical part in the vertical direction.
In this embodiment, the mounting plate 1, the sleeve 2, the first radial protrusions 4 and the second radial protrusions 5 are made of metal materials; the first annular damping cushion 31 and the second annular damping cushion 32 are both made of viscoelastic damping rubber materials.
The working principle of the invention is as follows: referring to fig. 4, the external mounting support 7 receives the vibration and then transfers the vibration to the first radial protrusion 4, the sleeve 2, and the second radial protrusion 5, and causes the displacement of the three; after the first horizontal part of the first annular damping pad 31 and the second horizontal part of the second annular damping pad 32 receive axial displacement, kinetic energy is converted into heat energy for vibration reduction; the first vertical part of the first annular damping pad 31 and the second vertical part of the second annular damping pad 32 receive the radial displacement, and then convert kinetic energy into heat energy for vibration reduction.
The above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same, and it is obvious for a person skilled in the art to modify the specific technical solutions described in the foregoing embodiments or to substitute part of the technical features, and these modifications or substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions protected by the present invention.
Claims (6)
1. The utility model provides a shock absorber with precision positioning and prevent function of buckling which characterized in that: comprises a mounting plate (1), a sleeve (2) and a damping pad component (3);
the mounting plate (1) comprises a circular ring (11) and connecting plates (12) symmetrically arranged at the bottom of the circular ring (11) along the axis of the circular ring (11), connecting holes (13) are formed in the connecting plates (12), and positioning rings (14) protruding axially are arranged on the inner side of the lower surface of the connecting plates (12);
the sleeve (2) is coaxially sleeved in the circular ring (11), and the top and the bottom of the sleeve (2) are respectively provided with a first radial bulge (4) and a second radial bulge (5); the upper surface of the first radial bulge (4) is provided with at least one guide beam (41) along the radial direction of the sleeve (2);
the damping cushion assembly (3) comprises a first annular damping cushion (31) and a second annular damping cushion (32) which are coaxially sleeved on the sleeve (2), and the axial sections of the first annular damping cushion (31) and the second annular damping cushion (32) are both of T-shaped structures; the first annular damping pad (31) comprises a first horizontal part which is abutted with the lower surface of the first radial bulge (4) and the upper surface of the ring (11) and is in contact with the outer side wall of the sleeve (2), and a first vertical part which is arranged at the lower part of the first horizontal part and is abutted with the inner side wall of the ring (11) and the outer side wall of the sleeve (2); the second annular damping pad (32) comprises a second horizontal part which is abutted to the upper surface of the second radial bulge (5) and the lower surface of the ring (11) and is in contact with the outer side wall of the sleeve (2), and a second vertical part which is arranged on the upper part of the second horizontal part and is abutted to the inner side wall of the ring (11) and the outer side wall of the sleeve (2).
2. The damper with the functions of precise positioning and torsion prevention according to claim 1, wherein: the second radial bulge (5) and the sleeve (2) are of an integral structure, and the first radial bulge (4) is fixedly connected with the sleeve (2).
3. A damper having a fine positioning and anti-twisting function as claimed in claim 2, wherein: a gap exists between the first vertical portion of the first annular damping pad (31) and the second vertical portion of the second annular damping pad (32).
4. A damper having a fine positioning and anti-twisting function as claimed in claim 3, wherein: the connecting plate (12) comprises a cylinder arranged at the lower end of the circular ring (11) and flange plates symmetrically arranged at the lower end of the cylinder, and the flange plates are provided with the connecting holes (13).
5. The damper with the functions of precise positioning and torsion prevention according to claim 4, wherein: the outer side wall of the circular ring (11) is a conical surface, and the area of the upper surface of the circular ring (11) is smaller than that of the lower surface.
6. A damper with fine positioning and anti-twisting functions as claimed in any one of claims 1 to 5, wherein: the mounting plate (1), the sleeve (2), the first radial protrusion (4) and the second radial protrusion (5) are made of metal materials; the first annular damping cushion (31) and the second annular damping cushion (32) are both made of viscoelastic damping rubber materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210346165.9A CN115013478A (en) | 2022-03-31 | 2022-03-31 | Shock absorber with precise positioning and anti-twisting functions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210346165.9A CN115013478A (en) | 2022-03-31 | 2022-03-31 | Shock absorber with precise positioning and anti-twisting functions |
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| CN115013478A true CN115013478A (en) | 2022-09-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210346165.9A Pending CN115013478A (en) | 2022-03-31 | 2022-03-31 | Shock absorber with precise positioning and anti-twisting functions |
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0058911A1 (en) * | 1981-02-23 | 1982-09-01 | Klöckner-Humboldt-Deutz Aktiengesellschaft | Rubber spring for the elastic suspension of machines |
| GB2123113A (en) * | 1982-06-25 | 1984-01-25 | Ford Motor Co | Resilient rubber mounting in particular engine mounting for motor vehicles and the like |
| CN102518729A (en) * | 2011-11-25 | 2012-06-27 | 西安航天精密机电研究所 | Shock absorber for laser strap-down inertial measurement unit (LSIMU) |
| US20120326369A1 (en) * | 2010-10-29 | 2012-12-27 | Toyota Jidosha Kabushiki Kaisha | Tank rubber cushion |
| CN103115100A (en) * | 2013-02-06 | 2013-05-22 | 航天材料及工艺研究所 | Combined type rubber shock absorber |
| CN204099489U (en) * | 2014-07-21 | 2015-01-14 | 北京自动化控制设备研究所 | A kind of falling-proof type vibration damping equipment |
| CN105114500A (en) * | 2015-08-27 | 2015-12-02 | 航天材料及工艺研究所 | Low-temperature-resistant durable vibration rubber shock absorber |
| CN111649085A (en) * | 2020-06-28 | 2020-09-11 | 天津东丰和美新材料科技有限公司 | Novel three-dimensional shear type shock absorber |
| CN112923007A (en) * | 2021-04-02 | 2021-06-08 | 贵州航天凯山石油仪器有限公司 | Vibration damper for mine underground inertial navigation system |
| CN114215870A (en) * | 2021-11-29 | 2022-03-22 | 北京空间机电研究所 | Metal rubber combined vibration isolation device of space remote sensing camera and installation method |
| CN216111936U (en) * | 2021-09-28 | 2022-03-22 | 福建睿振科技有限公司 | Three-way vibration-damping metal rubber engine vibration damper |
-
2022
- 2022-03-31 CN CN202210346165.9A patent/CN115013478A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0058911A1 (en) * | 1981-02-23 | 1982-09-01 | Klöckner-Humboldt-Deutz Aktiengesellschaft | Rubber spring for the elastic suspension of machines |
| GB2123113A (en) * | 1982-06-25 | 1984-01-25 | Ford Motor Co | Resilient rubber mounting in particular engine mounting for motor vehicles and the like |
| US20120326369A1 (en) * | 2010-10-29 | 2012-12-27 | Toyota Jidosha Kabushiki Kaisha | Tank rubber cushion |
| CN102518729A (en) * | 2011-11-25 | 2012-06-27 | 西安航天精密机电研究所 | Shock absorber for laser strap-down inertial measurement unit (LSIMU) |
| CN103115100A (en) * | 2013-02-06 | 2013-05-22 | 航天材料及工艺研究所 | Combined type rubber shock absorber |
| CN204099489U (en) * | 2014-07-21 | 2015-01-14 | 北京自动化控制设备研究所 | A kind of falling-proof type vibration damping equipment |
| CN105114500A (en) * | 2015-08-27 | 2015-12-02 | 航天材料及工艺研究所 | Low-temperature-resistant durable vibration rubber shock absorber |
| CN111649085A (en) * | 2020-06-28 | 2020-09-11 | 天津东丰和美新材料科技有限公司 | Novel three-dimensional shear type shock absorber |
| CN112923007A (en) * | 2021-04-02 | 2021-06-08 | 贵州航天凯山石油仪器有限公司 | Vibration damper for mine underground inertial navigation system |
| CN216111936U (en) * | 2021-09-28 | 2022-03-22 | 福建睿振科技有限公司 | Three-way vibration-damping metal rubber engine vibration damper |
| CN114215870A (en) * | 2021-11-29 | 2022-03-22 | 北京空间机电研究所 | Metal rubber combined vibration isolation device of space remote sensing camera and installation method |
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| Title |
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| 杨朋军;黄金威;李良;: "激光捷联惯组减振系统设计计算及试验研究", 导航定位与授时, no. 04 * |
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