CN212584177U - Back vibration isolator capable of resisting low-frequency resonance - Google Patents
Back vibration isolator capable of resisting low-frequency resonance Download PDFInfo
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- CN212584177U CN212584177U CN202021296387.7U CN202021296387U CN212584177U CN 212584177 U CN212584177 U CN 212584177U CN 202021296387 U CN202021296387 U CN 202021296387U CN 212584177 U CN212584177 U CN 212584177U
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Abstract
The utility model relates to a back vibration isolator for resisting low-frequency resonance, which comprises a shell and a central shaft, wherein the upper end and the lower end of the shell are respectively provided with a vibration damping cavity, the central shaft is vertically arranged in the shell, and the upper end and the lower end of the central shaft are respectively positioned in two vibration damping cavities; a damping mechanism is arranged in the vibration attenuation cavity and comprises a damping retaining ring and a damping conical ring which are arranged in an inner-outer fit mode; the damping baffle ring is positioned at the bottom of the damping cavity and is integrated with the shell into a whole, and the surface of the damping baffle ring is provided with a conical surface matched with the damping conical ring; the damping baffle ring is sleeved on the central shaft, and a certain gap is formed between the damping baffle ring and the central shaft; the inner hole of the damping cone ring is fitted and sleeved on the central shaft, and a certain gap is reserved between the circumferential outer wall of the damping cone ring and the inner wall of the vibration damping cavity. The utility model discloses keep off the damping and encircle and be the integral type design with the casing, prevent that the damping from keeping off ring and damping cone ring resonance, prevent the phenomenon of knocking that equipment start initial stage low frequency resonance produced.
Description
Technical Field
The utility model belongs to the technical field of the vibration isolation protection equipment is made, concretely relates to anti low frequency resonance's back isolator.
Background
In the development of modern military, weaponry is continuously upgraded, and higher requirements are put forward on electronic equipment, particularly when the equipment is subjected to larger impact force, larger overturning force is generated, and a vibration isolator arranged on the back of the electronic equipment is required to have better impact resistance, so that the electronic equipment can normally work without being damaged.
Many back isolator that use on the existing market are mostly the structure that adopts the spring to compress tightly damping fender ring and damping awl ring, rely on the damping to keep off the friction of the conical surface of ring and damping awl ring, and the pressure of cooperation spring is through frictional damping power for loss impact energy obtains the buffering. A damping baffle ring and a damping cone ring in the stiffness adjustable variable damping back vibration isolator, application No. 201510171265.2; the cone ring and the open ring in the application number 201610317184.3 of the back vibration isolator with vibration resistance and impact resistance and the application number 201620687999.6 of the back vibration isolator with strong impact resistance.
The vibration isolators have good impact energy loss and buffering effect. However, in long-term use, the device is found to have obvious knocking phenomenon in the initial low-frequency vibration of the device (the vibration frequency of the device is rapidly increased from 0 to be stable from the start-up operation), especially 7Hz, 8Hz, 9Hz and 10 Hz. Through research, the reason for generating the knocking phenomenon is found to be that a gap is inevitably formed between the damping baffle ring and the shell due to the influence of the split type design and the machining precision of the damping baffle ring, and ore quantity exists more or less. In the low-frequency vibration of the initial starting section of the equipment, the damping baffle ring, the damping cone ring and the central shaft can form resonance (namely the damping baffle ring, the damping cone ring and the central shaft form an integral structure and synchronously vibrate), and the damping baffle ring and the damping cone ring have no sliding friction and cannot play a role in buffering and vibration isolation; along with the increase of the vibration frequency, the energy accumulated earlier between the damping baffle ring and the damping cone ring can be released at a certain critical point (especially, when 8Hz and 9H are adopted, the static friction between the damping baffle ring and the damping cone ring is overcome), and the doubled energy accumulated earlier can be released at the point, so that the knocking phenomenon of the equipment is generated.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an anti low frequency resonance's back isolator for solve among the prior art by the phenomenon of strikeing that equipment start initial stage low frequency resonance produced.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a back vibration isolator capable of resisting low-frequency resonance comprises a shell and a central shaft, wherein the upper end and the lower end of the shell are respectively provided with a vibration reduction cavity, the central shaft is vertically arranged in the shell, and the upper end and the lower end of the central shaft are respectively positioned in the two vibration reduction cavities; the method is characterized in that: a damping mechanism is arranged in the vibration attenuation cavity and comprises a damping retaining ring and a damping conical ring which are arranged in an inner-outer fit mode; the damping baffle ring is positioned at the bottom of the damping cavity and is integrated with the shell into a whole, and the surface of the damping baffle ring is provided with a conical surface matched with the damping conical ring; the damping baffle ring is sleeved on the central shaft, and a certain gap is formed between the damping baffle ring and the central shaft; the inner hole of the damping cone ring is fitted and sleeved on the central shaft, and a certain gap is reserved between the circumferential outer wall of the damping cone ring and the inner wall of the vibration damping cavity.
Furthermore, the end of the central shaft is in threaded connection with an inner adjusting threaded sleeve, and a compressed spring is arranged between the inner adjusting threaded sleeve and the damping conical ring.
Furthermore, an inner spring gasket is arranged in the vibration reduction cavity, the inner spring gasket falls on the damping cone ring, and the circumferential outer wall of the inner spring gasket is attached to the inner wall of the vibration reduction cavity; the inner spring gasket is sleeved on the central shaft, and a certain gap is formed between the inner spring gasket and the central shaft; the spring is an inner conical spring, and two ends of the inner conical spring are respectively abutted against the inner adjusting threaded sleeve and the inner spring gasket.
Further, the outside opening in damping chamber is equipped with outer regulation swivel nut, outer regulation swivel nut and casing screw-thread fit connection, outer regulation swivel nut and interior regulation swivel nut laminating contact.
Furthermore, the middle part of the central shaft is also connected with a joint bearing, the central shafts on the two sides of the joint bearing are sleeved with outer conical springs, and the two ends of each outer conical spring are respectively abutted against the damping retaining ring and the joint bearing.
The utility model has the advantages that:
the damping retaining ring and the shell are designed into a whole, so that the damping retaining ring and the damping conical ring are prevented from resonating, and sliding friction is always generated between the damping retaining ring and the damping conical ring; no matter what frequency, as long as equipment start damping taper ring will produce sliding friction with damping fender ring under the effect of center pin, reach the effect that the loss impact energy obtained the buffering, prevent the strike phenomenon that equipment start initial stage low frequency resonance produced.
Drawings
FIG. 1 is a schematic view of the embodiment of the back vibration isolator for resisting low frequency resonance.
The damping device comprises a shell, an outer adjusting threaded sleeve, an inner spring gasket, a joint bearing, an outer conical spring, a damping retaining ring, an inner conical spring, an outer conical spring, a damping conical ring, a damping retaining ring, a damping conical ring, a shell, a central shaft and a central shaft, wherein the outer adjusting threaded sleeve is 1, the inner adjusting threaded sleeve is 2, the inner adjusting threaded sleeve is 3, the inner.
Detailed Description
In order to better understand the present invention, the technical solution of the present invention is further described below with reference to the following embodiments.
The embodiment is mainly an improvement aiming at the application number 201510171265.2 of the 'stiffness adjustable variable damping back vibration isolator', and is also suitable for the application number 201610317184.3 of the 'vibration-resistant and impact-resistant back vibration isolator' and the application number 201620687999.6 of the 'strong impact type back vibration isolator'.
As shown in fig. 1, the back vibration isolator for resisting low-frequency resonance comprises a housing 9 and a central shaft 10, wherein the upper end and the lower end of the housing 9 are respectively provided with a vibration damping cavity, the central shaft 10 is vertically arranged in the housing 9, and the upper end and the lower end of the central shaft 10 are respectively located in the two vibration damping cavities; a damping mechanism is arranged in the vibration attenuation cavity and comprises a damping retaining ring 6 and a damping conical ring 8 which are arranged in an inner-outer fit manner; the damping baffle ring 6 is positioned at the bottom of the damping cavity and is integrated with the shell 9 into a whole, and the surface of the damping baffle ring 6 is provided with a conical surface matched with the damping conical ring 8 to form conical surface matching; the damping baffle ring 6 is sleeved on the central shaft 10, and a certain gap is formed between the damping baffle ring and the central shaft 10; the inner hole of the damping cone ring 8 is fitted and sleeved on the central shaft 10, and a certain gap is formed between the circumferential outer wall of the damping cone ring 8 and the inner wall of the vibration damping cavity.
The end of the central shaft 10 is in threaded connection with an inner adjusting threaded sleeve 2, and a compressed inner cone spring 7 is arranged between the inner adjusting threaded sleeve 2 and the damping cone ring 8. An inner spring gasket 3 is further arranged in the vibration attenuation cavity, the inner spring gasket 3 falls on a damping conical ring 8, and the circumferential outer wall of the inner spring gasket 3 is attached to the inner wall of the vibration attenuation cavity; the inner spring gasket 3 is sleeved on the central shaft 10, and a certain gap is formed between the inner spring gasket and the central shaft 10; the spring is an inner conical spring 7, and two ends of the inner conical spring 7 are respectively abutted against the inner adjusting threaded sleeve 2 and the inner spring gasket 3. The outer opening of the vibration reduction cavity is provided with an outer adjusting threaded sleeve 1, the outer adjusting threaded sleeve 1 is in threaded fit connection with the shell 9, and the outer adjusting threaded sleeve 1 is in contact with the inner adjusting threaded sleeve 2 in a fitting mode.
The middle part of the central shaft 10 is also connected with a joint bearing 4, the central shaft 10 on two sides of the joint bearing 4 is sleeved with an outer conical spring 5, and two ends of the outer conical spring 5 are respectively propped against the damping retaining ring 6 and the joint bearing 4.
The utility model discloses a principle and effect:
as shown in fig. 1, the damping retaining ring and the shell are designed in an integrated manner, so that the damping retaining ring 6 and the damping conical ring 8 are prevented from resonating to form an integral structure, and sliding friction is always generated between the damping retaining ring 6 and the damping conical ring 8; no matter what frequency, as long as the equipment starts the damping cone ring 8 will produce sliding friction with the damping baffle ring 6 under the effect of the central shaft, reach the effect that the loss impact energy, obtain the buffering, prevent the equipment and start the initial stage low frequency resonance and produce the knock phenomenon.
The above description is only an example of the present invention, and certainly, the scope of the present invention should not be limited thereto, and therefore, the present invention is not limited to the above description.
Claims (5)
1. The back vibration isolator capable of resisting low-frequency resonance comprises a shell (9) and a central shaft (10), wherein the upper end and the lower end of the shell (9) are respectively provided with a vibration reduction cavity, the central shaft (10) is vertically arranged in the shell (9), and the upper end and the lower end of the central shaft (10) are respectively positioned in the two vibration reduction cavities; the method is characterized in that: a damping mechanism is arranged in the vibration attenuation cavity and comprises a damping baffle ring (6) and a damping conical ring (8) which are arranged in an inner-outer fit manner; the damping baffle ring (6) is positioned at the bottom of the damping cavity and is integrated with the shell (9) into a whole, and the surface of the damping baffle ring (6) is provided with a conical surface matched with the damping conical ring (8); the damping baffle ring (6) is sleeved on the central shaft (10) and has a certain gap with the central shaft (10); the inner hole of the damping cone ring (8) is fitted and sleeved on the central shaft (10), and a certain gap is reserved between the circumferential outer wall of the damping cone ring (8) and the inner wall of the vibration reduction cavity.
2. The low frequency resonance resistant dorsal isolator according to claim 1, wherein: the end of the central shaft (10) is in threaded connection with an inner adjusting threaded sleeve (2), and a compressed spring is arranged between the inner adjusting threaded sleeve (2) and the damping conical ring (8).
3. The dorsal isolator according to claim 2, wherein the dorsal isolator is resistant to low frequency resonance: an inner spring gasket (3) is further arranged in the vibration reduction cavity, the inner spring gasket (3) falls on the damping conical ring (8), and the circumferential outer wall of the inner spring gasket (3) is attached to the inner wall of the vibration reduction cavity; the inner spring gasket (3) is sleeved on the central shaft (10) and has a certain gap with the central shaft (10); the spring is an inner conical spring (7), and two ends of the inner conical spring (7) are respectively abutted against the inner adjusting threaded sleeve (2) and the inner spring gasket (3).
4. The dorsal isolator according to claim 2 or 3, wherein: the outer opening of the vibration reduction cavity is provided with an outer adjusting threaded sleeve (1), the outer adjusting threaded sleeve (1) is in threaded fit connection with the shell (9), and the outer adjusting threaded sleeve (1) is in fit contact with the inner adjusting threaded sleeve (2).
5. The low frequency resonance resistant dorsal isolator according to claim 1, wherein: the middle part of center pin (10) still is connected with joint bearing (4), all overlap on center pin (10) of joint bearing (4) both sides and have outer cone spring (5), the both ends of outer cone spring (5) offset with damping fender ring (6) and joint bearing (4) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021296387.7U CN212584177U (en) | 2020-07-02 | 2020-07-02 | Back vibration isolator capable of resisting low-frequency resonance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021296387.7U CN212584177U (en) | 2020-07-02 | 2020-07-02 | Back vibration isolator capable of resisting low-frequency resonance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212584177U true CN212584177U (en) | 2021-02-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021296387.7U Active CN212584177U (en) | 2020-07-02 | 2020-07-02 | Back vibration isolator capable of resisting low-frequency resonance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212584177U (en) |
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2020
- 2020-07-02 CN CN202021296387.7U patent/CN212584177U/en active Active
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