CN108533656B - Rubber vibration damper - Google Patents
Rubber vibration damper Download PDFInfo
- Publication number
- CN108533656B CN108533656B CN201810392693.1A CN201810392693A CN108533656B CN 108533656 B CN108533656 B CN 108533656B CN 201810392693 A CN201810392693 A CN 201810392693A CN 108533656 B CN108533656 B CN 108533656B
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- Prior art keywords
- mounting hole
- hole
- rubber vibration
- fulcrum
- gland
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- 210000004907 gland Anatomy 0.000 claims abstract description 31
- 238000009434 installation Methods 0.000 claims abstract description 24
- 238000013016 damping Methods 0.000 claims abstract description 22
- 230000035939 shock Effects 0.000 claims abstract description 21
- 239000006096 absorbing agent Substances 0.000 claims abstract description 16
- 230000000149 penetrating effect Effects 0.000 claims abstract description 10
- 230000009467 reduction Effects 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 9
- 230000004044 response Effects 0.000 claims description 9
- 238000001228 spectrum Methods 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 8
- 239000007769 metal material Substances 0.000 claims description 2
- 238000002955 isolation Methods 0.000 abstract description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- 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
- F16F7/00—Vibration-dampers; Shock-absorbers
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vibration Prevention Devices (AREA)
- Vibration Dampers (AREA)
- Springs (AREA)
Abstract
The invention belongs to the technical field of rubber vibration isolation, in particular relates to a rubber vibration absorber, and aims to solve the problems that the appearance structure size of a vibration absorbing system of the existing product is large and the pre-tightening amount of each vibration absorber in the vibration absorbing system is not easy to control. The shock absorber comprises a rubber shock absorbing pad, a gland and a fulcrum shaft, wherein the gland and the fulcrum shaft are respectively arranged at two ends of the rubber shock absorbing pad; the fulcrum is inverted T-shaped, the large end is provided with a mounting boss, the small end is provided with external threads, and the middle part of the fulcrum is provided with a through hole penetrating through the axis of the fulcrum; the rubber vibration-damping pad is cylindrical, the longitudinal section is I-shaped, and the middle part is provided with a fulcrum installation hole penetrating through the axle center of the rubber vibration-damping pad; the gland is provided with a step hole, the step hole comprises a first mounting hole and a second mounting hole which are coaxially arranged, wherein the diameter of the first mounting hole is equal to the diameter of the through hole, the diameter of the second mounting hole is matched with the outer diameter of the small end of the fulcrum shaft, and an internal thread is arranged in the second mounting hole; the fulcrum shaft passes through the fulcrum shaft mounting hole from bottom to top and stretches into the second mounting hole to be connected with the gland through threads.
Description
Technical Field
The invention belongs to the technical field of rubber vibration isolation, and particularly relates to a rubber vibration absorber.
Background
Along with the continuous development of the aerospace technology, the reliability requirements on aerospace products are higher and higher, and particularly the mechanical environment adaptability of the products under the launching and flying conditions is higher and higher. At present, most of vibration damping systems suitable for the environment adopt rubber vibration damping systems, and the rubber vibration damping systems can meet severe working environments such as high temperature, high pressure, high vacuum, ultralow temperature, corrosive media and the like in the fields of aviation, aerospace, national defense and the like. In order to enable the product to meet the mechanical environments such as vibration, overload, transportation and impact, the rubber vibration damper needs to be pre-tightened to a certain extent when being installed, the overall rigidity of the product is improved to a certain extent, and meanwhile the product can meet the adaptability under the low-frequency and high-frequency mechanical environments.
At present, the traditional shock absorber structure and the installation mode are as shown in fig. 1 and 2, four shock absorbers are installed on each product 6, each shock absorber comprises a rubber shock absorbing pad 7, a gland 8 and a screw 9, the rubber shock absorbing pad 7 is of an I-shaped structure, the rubber shock absorbing pad 7 is firstly installed on a product, the rubber shock absorbing pad is installed on an installation bottom plate through the gland 8 and the screw 9, four through holes are formed in four corners of the installation bottom plate and used for being installed and fixed with external machinery, and the overall dimension of the whole shock absorbing system of the product is large. When the screws are used for installation, the pre-tightening amount of each screw on the rubber vibration damper pad 7 is not easy to control, and is usually determined by the experience of an operator during pre-tightening, and the pre-tightening amount of the four vibration dampers is difficult to be consistent in the installation mode.
Disclosure of Invention
The invention aims to solve the problems that the external structural size of a vibration damping system of the existing product is large and the pretightening amount of each vibration damper in the vibration damping system is not easy to control, and provides a rubber vibration damper.
In order to accomplish the above object, the present invention proposes the following technical scheme:
a rubber shock absorber is characterized in that: the device comprises a rubber vibration reduction pad, a gland and a fulcrum, wherein the rubber vibration reduction pad is arranged in the middle, and the gland and the fulcrum are respectively arranged at two ends of the rubber vibration reduction pad;
the fulcrum is inverted T-shaped, the large end is provided with a mounting boss, the small end is provided with external threads, and the middle part of the fulcrum is provided with a through hole penetrating through the axis of the fulcrum;
the rubber vibration-damping pad is cylindrical, the longitudinal section is I-shaped, and the middle part is provided with a fulcrum installation hole penetrating through the axle center of the rubber vibration-damping pad;
the gland is provided with a step hole, the step hole comprises a first mounting hole and a second mounting hole which are coaxially arranged, wherein the aperture of the first mounting hole is equal to that of the through hole, the aperture of the second mounting hole is matched with the outer diameter of the small end of the support shaft, and an internal thread is arranged in the second mounting hole;
the fulcrum shaft passes through the fulcrum shaft mounting hole from bottom to top and stretches into the second mounting hole to be connected with the gland through threads.
Further, an annular assembly groove used for limiting the lower end of the rubber vibration reduction pad is formed in the inner end face of the installation boss, and the outer diameter of the annular assembly groove is matched with the outer diameter of the lower end of the rubber vibration reduction pad.
Further, the step hole further comprises a third mounting hole coaxially arranged, the aperture of the third mounting hole is equal to the outer diameter of the upper end of the rubber vibration reduction pad, and the upper end of the rubber vibration reduction pad is jacked into the third mounting hole.
Further, the outer diameter of the middle part of the rubber vibration-damping pad is such that when it is mounted to the damper mounting hole of the product to be damped, the mounting clearance c satisfies:
c > 1.5mm when the impact response spectrum is less than 5000 g;
c is more than 2.5mm when the impact response spectrum is more than 5000g and less than 8000 g;
when the impact response spectrum is greater than 8000g, c > 3mm.
Further, for convenient installation, the outer end surfaces of the installation boss and the gland are respectively provided with at least one process hole.
Further, the number of the two process holes is two, and the two process holes are symmetrically arranged on two sides of the axle center of the installation boss or the gland.
Further, the fulcrum and the gland are both made of metal materials.
Compared with the prior art, the invention has the advantages that:
1. the small end of the fulcrum shaft of the rubber shock absorber is provided with the external thread, the second mounting hole matched with the small end of the fulcrum shaft is internally provided with the internal thread, the fulcrum shaft is screwed to enable the upper end face of the fulcrum shaft to be in contact with the upper end face of the second mounting hole, the pre-tightening amount of each rubber shock absorber pad can be accurately controlled through the depth of the second mounting hole, the experience of an operator is not depended, the pre-tightening amount of four rubber shock absorbers can be guaranteed to be consistent, and the shock absorbing effect is improved.
2. The rubber vibration damper comprises a rubber vibration damper pad, a gland and a fulcrum shaft, wherein the rubber vibration damper pad is arranged in the middle; the middle part of the rubber vibration damping pad is provided with a fulcrum installation hole penetrating through the axis of the rubber vibration damping pad, the gland is provided with a second installation hole matched with the outer diameter of the small end of the fulcrum, and the fulcrum penetrates through the fulcrum installation hole from bottom to top and stretches into the second installation hole to be connected with the gland in a threaded manner. The vibration damping device can be directly arranged on a product to be damped, and is not required to be fixed by adopting an installation bottom plate and screws, so that the miniaturization and the light weight of the vibration damping system can be realized.
3. The middle part of the fulcrum shaft is provided with a through hole penetrating through the axis of the fulcrum shaft, the gland is provided with a first mounting hole, the aperture of the first mounting hole is equal to that of the through hole, a mounting interface can be provided for external machinery, the mounting interface does not need to be independently arranged, and the overall size of the vibration reduction system is further reduced.
Drawings
FIG. 1 is a front view of a prior art shock absorber mounting structure;
FIG. 2 is a top view of a prior art shock absorber mounting structure;
FIG. 3 is a schematic view of a rubber shock absorber according to an embodiment of the present invention;
FIG. 4 is a schematic view of the fulcrum of FIG. 3;
FIG. 5 is a schematic view of the rubber vibration damping pad of FIG. 3;
FIG. 6 is a schematic view of the gland of FIG. 3;
FIG. 7 is a front view of a rubber vibration damper mounting structure of an embodiment of the present invention;
FIG. 8 is a top view of a rubber damper mounting structure according to an embodiment of the present invention.
The reference numerals in the drawings are as follows:
in fig. 1 and 2: 6-products, 7-rubber vibration reduction pads, 8-gland and 9-screws;
in fig. 3-8: 1-rubber vibration damping pad, 2-gland, 3-fulcrum, 4-process hole, 5-product, 11-fulcrum mounting hole, 21-step hole, 31-mounting boss, 32-through hole, 33-external screw thread, 211-first mounting hole, 212-second mounting hole, 213-third mounting hole, 214-internal screw thread, 311-annular mounting groove.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions in the embodiments will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention, and the following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
Referring to fig. 3 to 6, a rubber damper comprises a rubber damper pad 1, a gland 2 and a fulcrum shaft 3, wherein the rubber damper pad 1 is arranged in the middle, and the gland 2 and the fulcrum shaft 3 are respectively arranged at two ends of the rubber damper pad 1; the fulcrum 3 is inverted T-shaped, the large end is provided with a mounting boss 31, the small end is provided with an external thread 33, and the middle part of the fulcrum 3 is provided with a through hole 32 penetrating through the axis of the fulcrum; the rubber vibration-damping pad 1 is cylindrical, the longitudinal section is I-shaped, and the middle part is provided with a fulcrum installation hole 11 penetrating through the axis of the rubber vibration-damping pad; the gland 2 is provided with a step hole 21, the step hole 21 comprises a first mounting hole 211 and a second mounting hole 212 which are coaxially arranged, wherein the aperture of the first mounting hole 211 is equal to that of the through hole 32, the aperture of the second mounting hole 212 is matched with the outer diameter of the small end of the support shaft 3, and an internal thread 214 is arranged in the second mounting hole 212; the fulcrum shaft 3 passes through the fulcrum shaft mounting hole 11 from bottom to top and stretches into the second mounting hole 212 to be screwed with the gland 2.
An annular assembly groove 311 is formed in the inner end face of the installation boss 31, an annular assembly groove 311 used for limiting the lower end of the rubber vibration reduction pad 1 is formed in the inner end face of the installation boss 31, and the outer diameter of the annular assembly groove 311 is matched with the outer diameter of the lower end of the rubber vibration reduction pad 1. The lower end of the rubber vibration reduction pad 1 is propped into the annular mounting groove 311. The step hole 21 further comprises a third mounting hole 213 coaxially arranged, the diameter of the third mounting hole 213 is equal to that of the upper end of the rubber vibration reduction pad 1, and the upper end of the rubber vibration reduction pad 1 is propped into the third mounting hole 213. The outer end surfaces of the mounting boss 31 and the gland 2 are respectively provided with two process holes 4, and the two process holes 4 are symmetrically arranged on two sides of the axle center of the mounting boss 31 and the gland 2.
Referring to fig. 7 and 8, four rubber dampers are symmetrically mounted on four lugs of the product 5 to be damped; when the positions of the rubber vibration dampers are arranged, the condition that the intersection point of the central connecting lines of the rubber vibration dampers coincides with the mass center of the product is firstly satisfied, and vibration coupling of the product 5 in a vibration environment is avoided. Secondly, according to engineering experience, a clearance c= (H-H1)/2 between the rubber damper and the side wall of the product 5 is H, wherein H is the aperture of a damper mounting hole, and H1 is the outer diameter of the middle part of the rubber damper pad. In a large magnitude impact environment, the gap c should satisfy the following condition: c > 1.5mm when the impact response spectrum is less than 5000 g; c is more than 2.5mm when the impact response spectrum is more than 5000g and less than 8000 g; when the impact response spectrum is more than 8000g, c is more than 3mm; through the design, the rubber shock absorber can be prevented from colliding with the side wall of the product 5 under the condition of large-magnitude impact, so that structural members are prevented from being damaged.
It should be noted that the above description is only of the preferred embodiments of the present invention, and that it is obvious to those skilled in the art that modifications and improvements can be made without departing from the inventive concept of the present invention, which falls within the scope of the present invention.
Claims (4)
1. A rubber shock absorber, characterized in that: the device comprises a rubber vibration reduction pad (1), a gland (2) and a support shaft (3), wherein the rubber vibration reduction pad (1) is arranged in the middle, and the gland (2) and the support shaft (3) are respectively arranged at two ends of the rubber vibration reduction pad (1);
the fulcrum (3) is inverted T-shaped, the large end is provided with a mounting boss (31), the small end is provided with an external thread (33), and the middle part of the fulcrum (3) is provided with a through hole (32) penetrating through the axis of the fulcrum;
the rubber vibration-damping pad (1) is cylindrical, the longitudinal section is I-shaped, and a fulcrum installation hole (11) penetrating through the axis of the rubber vibration-damping pad is formed in the middle;
the gland (2) is provided with a step hole (21), the step hole (21) comprises a first mounting hole (211) and a second mounting hole (212) which are coaxially arranged, wherein the aperture of the first mounting hole (211) is equal to that of the through hole (32), the aperture of the second mounting hole (212) is matched with the outer diameter of the small end of the support shaft (3), and an internal thread (214) is arranged in the second mounting hole (212);
the fulcrum (3) passes through the fulcrum mounting hole (11) from bottom to top and stretches into the second mounting hole (212) to be connected with the gland (2) through threads;
an annular assembly groove (311) for limiting the lower end of the rubber vibration reduction pad (1) is formed in the inner end face of the mounting boss (31), and the outer diameter of the annular assembly groove (311) is matched with the outer diameter of the lower end of the rubber vibration reduction pad (1);
the step hole (21) further comprises a third mounting hole (213) which is coaxially arranged, the aperture of the third mounting hole (213) is equal to the outer diameter of the upper end of the rubber vibration reduction pad (1), and the upper end of the rubber vibration reduction pad (1) is jacked into the third mounting hole (213);
at least one process hole (4) is respectively arranged on the outer end surfaces of the installation boss (31) and the gland (2).
2. The rubber vibration damper according to claim 1, wherein: the outer diameter of the middle part of the rubber vibration damping pad (1) is such that when the rubber vibration damping pad is installed in a vibration damper installation hole of a product to be damped, the installation clearance c meets the following conditions:
c > 1.5mm when the impact response spectrum is less than 5000 g;
c is more than 2.5mm when the impact response spectrum is more than 5000g and less than 8000 g;
when the impact response spectrum is greater than 8000g, c > 3mm.
3. The rubber vibration damper according to claim 2, wherein: the number of the two process holes (4) is two, and the two process holes (4) are symmetrically arranged on two sides of the axle center of the installation boss (31) or the gland (2).
4. A rubber vibration damper according to claim 3, wherein: the support shaft (3) and the gland (2) are both made of metal materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810392693.1A CN108533656B (en) | 2018-04-27 | 2018-04-27 | Rubber vibration damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810392693.1A CN108533656B (en) | 2018-04-27 | 2018-04-27 | Rubber vibration damper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108533656A CN108533656A (en) | 2018-09-14 |
| CN108533656B true CN108533656B (en) | 2024-01-05 |
Family
ID=63477650
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810392693.1A Active CN108533656B (en) | 2018-04-27 | 2018-04-27 | Rubber vibration damper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108533656B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115163742A (en) * | 2022-07-05 | 2022-10-11 | 西北机电工程研究所 | Split type rubber vibration damper |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050107921A (en) * | 2004-05-10 | 2005-11-16 | 주식회사 만도 | Bolt type mounting member of a shock absorber |
| CN204704302U (en) * | 2015-03-30 | 2015-10-14 | 北京自动化控制设备研究所 | A kind of spacing collar anti-rotation vibration damper |
| CN105864341A (en) * | 2016-05-23 | 2016-08-17 | 航天材料及工艺研究所 | High-reliability combined type shock absorber |
| CN208268287U (en) * | 2018-04-27 | 2018-12-21 | 中国科学院西安光学精密机械研究所 | Rubber shock absorber |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3900030B2 (en) * | 2002-07-11 | 2007-04-04 | 東海ゴム工業株式会社 | Active dynamic damper |
-
2018
- 2018-04-27 CN CN201810392693.1A patent/CN108533656B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050107921A (en) * | 2004-05-10 | 2005-11-16 | 주식회사 만도 | Bolt type mounting member of a shock absorber |
| CN204704302U (en) * | 2015-03-30 | 2015-10-14 | 北京自动化控制设备研究所 | A kind of spacing collar anti-rotation vibration damper |
| CN105864341A (en) * | 2016-05-23 | 2016-08-17 | 航天材料及工艺研究所 | High-reliability combined type shock absorber |
| CN208268287U (en) * | 2018-04-27 | 2018-12-21 | 中国科学院西安光学精密机械研究所 | Rubber shock absorber |
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| Publication number | Publication date |
|---|---|
| CN108533656A (en) | 2018-09-14 |
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