CN203161947U - Frequency-adjustable dynamic vibration absorber - Google Patents
Frequency-adjustable dynamic vibration absorber Download PDFInfo
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- CN203161947U CN203161947U CN 201320129345 CN201320129345U CN203161947U CN 203161947 U CN203161947 U CN 203161947U CN 201320129345 CN201320129345 CN 201320129345 CN 201320129345 U CN201320129345 U CN 201320129345U CN 203161947 U CN203161947 U CN 203161947U
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- vibration absorber
- dynamic vibration
- frequency
- absorbing unit
- mass block
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Abstract
The utility model belongs to the technical field of industrial equipment vibration damping and noise reduction, and provides a frequency-adjustable dynamic vibration absorber. The frequency-adjustable dynamic vibration absorber comprises a base (1), a mass block (5) and a vibration absorption spring system. A stand plate (7) which extends upwards is arranged in the middle of the base (1), the upper portion of the stand plate (7) is located in a groove which is formed in the lower end face of the mass block (5), the vibration absorption spring system comprises vibration absorption units (4), a protective steel plate (6) and an adjusting bolt (3), the two vibration absorption units (4) are symmetrically located on two sides of the upper portion of the stand plate (7), the adjusting bolt (3) and the mass block (5) are connected in a threaded mode, and a top of one end of the adjusting bolt is inserted into a blind hole in the outer end face of the protective steel plate. According to the frequency-adjustable dynamic vibration absorber, the adjusting bolt (3) is rotated to adjust shear stiffness of the vibration absorption units (4) to achieve adjustment of the valve of the spring coefficient k of the dynamic vibration absorber, and inherent frequency adjustment of the dynamic vibration absorber is achieved.
Description
Technical field
The utility model belongs to industry equipment noise reduction technology field, relates generally to a kind of frequency-adjustable dynamic vibration absorber.
Background technique
Dynamic vibration absorber is a kind of of vibration damper, and its basic principle is the quality-spring system that adds a single-degree-of-freedom in the main vibrating system of want vibration damping, forms coupled system.When the natural frequency of additional quality-spring system overlapped with excited frequency, quality-spring system resonated, the vibration aggravation, and the vibration amplitude of main vibrating system reduces greatly, thus protected main vibrating system.
From the basic principle of dynamic vibration absorber as can be seen, the effect frequency of each additional power bump leveller is single-frequency, and this frequency is determined by quality m and the rigidity k of quality-spring system.Each fixedly the effect frequency of the dynamic vibration absorber of m and k value fix.In actual life, no matter power source still is driven machinery, its vibrational state is the master of the single-frequency peak value that shakes not just often, therefore need regulate quality m or the rigidity k of dynamic vibration absorber according to the peak condition of equipment reality, in the hope of reaching design frequency temporarily.
A kind of dynamic vibration absorber of regulating natural frequency by the quality of regulation size has been proposed in the patent 200920067908.9.It is to have solved the dynamic vibration absorber natural frequency by the mode that increases or reduce the additional bob-weight quality of bolt on the mass block surface to regulate problem.But, this mode of frequency regulation requires designing and producing of dynamic vibration absorber to need to do the different mass block of a series of quality in the process, the program complexity, otherwise when being easy to cause at the scene frequency modulation because counterweight causes the frequency adjustment failure less than suitable mass block, actual operation is not strong.
Mentioned in the patent 200720027716.6 and a kind ofly regulated the rigidity size by electromagnetic force and regulate the dynamic vibration absorber of natural frequency.It is by the mode that regulating magnet coil current size changes electromagnetic force regulate elastic system in the dynamic vibration absorber the global stiffness size, thereby reach the purpose of regulating the dynamic shock absorber natural frequency.But this dynamic vibration absorber application is comparatively narrow, and system's additional zero parts are more, and cost is higher, and applicability is relatively poor.
The model utility content
For solving the problems of the technologies described above, the purpose of this utility model is to propose a kind of frequency-adjustable dynamic vibration absorber.
The utility model adopts following technological scheme for finishing above-mentioned purpose:
A kind of frequency-adjustable dynamic vibration absorber, described dynamic vibration absorber include base, mass block and vibration absorbing spring system; The middle part of described base has the riser that protrudes upward, and the top of described riser is positioned at the groove that the mass block lower end surface has; Described vibration absorbing spring system includes absorbing unit, shoulder guard and adjusting bolt; Described absorbing unit is two, and two described absorbing unit symmetries are positioned at the both sides on riser top; Described shoulder guard is two that corresponding absorbing unit arranges, and two described shoulder guards are connected as a single entity with corresponding absorbing unit respectively; Described adjusting bolt and mass block are for being threaded, in the blind hole that the insertion shoulder guard exterior edge face, top of described adjusting bolt one end has, formation is regulated bolt by rotation and is provided different precompressions to two absorbing unit, reaches the structure of regulating the dynamic vibration absorber natural frequency.
The junction plane of the junction plane of described shoulder guard and absorbing unit, absorbing unit and riser all adopts cold adhesive bonding way or bonding hot vulcanization mode to be fastenedly connected.
The both sides of described base have the mounting hole that is connected with matrix in order to convenient.
Described absorbing unit is the vulcanized rubber piece.
Described mass block is lead or bloom, and the sectional shape of described mass block is " recessed " type or " U " type.
Have on the sidewall of the described groove of mass block and regulate the interior threaded hole that bolt thread cooperates.
One end of described adjusting bolt is nut, and the other end is the top that cooperates with the above blind hole of shoulder guard.
A kind of frequency-adjustable dynamic vibration absorber that the utility model proposes adopts technique scheme, has following beneficial effect:
1, the utility model can be regulated bolt by rotation and regulate the size adjustment that the shearing rigidity of absorbing unit realizes dynamic vibration absorber spring constant k, thereby the natural frequency that realizes dynamic vibration absorber is regulated, not need and outside process the annex component, on-the-spot easy to use and reliable.
2, dynamic vibration absorber of the present utility model is simple in structure, and processing and easy for installation can be carried out industrialization promotion.
Description of drawings
Fig. 1 is whole generalized section of the present utility model.
Fig. 2 is whole schematic top plan view of the present utility model.
Fig. 3 is the overall structure figure that removes mass block in the utility model and adjust bolt.
Fig. 4 is the structural representation of regulating bolt in the utility model.
Among the figure: 1, base, 2, the mounting screw hole, 3, regulate bolt, 4, the absorbing unit, 5, mass block, 6, shoulder guard, 7, riser.
Embodiment
With embodiment the utility model is illustrated by reference to the accompanying drawings:
As shown in Figure 1 and Figure 2, a kind of frequency-adjustable dynamic vibration absorber, described dynamic vibration absorber include base 1, mass block 5 and vibration absorbing spring system; The middle part of described base 1 has the riser 7 that protrudes upward, and the top of described riser 7 is positioned at the groove that mass block 5 lower end surfaces have; Described vibration absorbing spring system includes absorbing unit 4, shoulder guard 6 and regulates bolt 3; Described absorbing unit 4 is two, and two described absorbing unit 4 symmetries are positioned at the both sides on riser 7 tops; Described shoulder guard 6 is two that corresponding absorbing unit 4 arranges, two described shoulder guards 6 are connected as a single entity with corresponding absorbing unit 4 respectively, and described shoulder guard 6 all adopts cold adhesive bonding way or bonding hot vulcanization mode to be fastenedly connected with junction plane, the absorbing unit 4 of absorbing unit 4 with the junction plane of riser 7; Described shoulder guard 6, absorbing unit 4 are connected as a single entity with mass block 5 by described adjusting bolt 3, described adjusting bolt 3 is by the interior threaded hole on the mass block sidewall, be threaded the interior threaded hole quantity on the mass block sidewall and the adjusting that to convert according to the area of absorbing unit 4 of arranging with mass block 5; In conjunction with Fig. 3, has the blind hole that cooperates in order to adjusting bolt 3 on the exterior edge face of described shoulder guard 6, in conjunction with Fig. 4, one end of described adjusting bolt 3 is nut, the other end is the top that cooperates with the above blind hole of shoulder guard 6, described adjusting bolt 3 passes the above interior threaded hole of mass block 5, and insert in the above the blind hole of shoulder guard 6 top that makes its other end, absorbing unit, 3 pairs of both sides of adjusting bolt 4 by rotating power bump leveller both sides provides different precompressions, thereby regulate the shearing rigidity of absorbing unit 4, reach the purpose of regulating the dynamic vibration absorber natural frequency; Whole dynamic vibration absorber relies on the shear deformation of the absorbing unit 4 of mass block 5 inner bilaterals that vertical rigidity K is provided, and relies on mass block 5 weight that mass of system m then is provided.
In conjunction with Fig. 1, the both sides of described base 1 have the mounting hole 2 that is connected with matrix in order to convenient.
Described absorbing unit 4 is the vulcanized rubber piece.
Described mass block 5 is lead or bloom, and the sectional shape of described mass block 5 is " recessed " type or " U " type.
The area of described shoulder guard 6 is equal to or greater than the area of absorbing unit 4, arranges and regulate the blind hole that bolt 3 quantity equate above every side shoulder guard 6, and the slightly larger in diameter of blind hole is in the top end diameter of adjusting bolt 3.Among this embodiment, described adjusting bolt is 8.
Before dynamic vibration absorber uses, need to demarcate with hammering method.In the calibration process, regulate the stiffness K of the screw-in degree adjusting dynamic vibration absorber of bolt by selecting 8 of the modulation joint left and right sides, thus the frequency of regulating dynamic vibration absorber.During use, adopt the ditch screw that whole dynamic vibration absorber is fixed on the substrates that needs processing, can finely tune by regulating bolt 3 according to the effect of dynamic vibration absorber then.When carrying out dynamic vibration absorber frequency demarcating and fine setting, 8 screw-in or the back-out amounts of regulating bolt 3 in the left and right sides should be consistent.
Describe with a certain specific embodiment." recessed " font communicates before and after mass block 5 integral body of dynamic vibration absorber are, weight 2.5 ㎏, bilateral absorbing unit 4 adopts the vulcanized rubber piece of 100 ㎜ * 50 ㎜ * 20 ㎜, and shoulder guard 6 is selected the steel plate of 8 ㎜ thickness, regulate bolt 3 and select the harness cord bolt of M6 for use, the top is furnished with circular top.By regulating the adjusting bolt 3 of dynamic vibration absorber, make the decrement control of one-sided absorbing unit 4 about 1 ㎜, then the natural frequency of dynamic vibration absorber is about 22.5Hz, by regulating screw-in and the back-out amount of adjusting bolt 3 on the dynamic vibration absorber, the tuning range of this type dynamic shock absorber can reach 14Hz---200Hz.
Claims (7)
1. frequency-adjustable dynamic vibration absorber, described dynamic vibration absorber includes base (1), mass block (5) and vibration absorbing spring system; It is characterized in that: the middle part of described base (1) has the riser (7) that protrudes upward, and the top of described riser (7) is positioned at the groove that mass block (5) lower end surface has; Described vibration absorbing spring system includes absorbing unit (4), shoulder guard (6) and regulates bolt (3); Described absorbing unit (4) is two, and two described absorbing unit (4) symmetry is positioned at the both sides on riser (7) top; Described shoulder guard (6) is two that corresponding absorbing unit (4) arranges, two described shoulder guards (6) are connected as a single entity with corresponding absorbing unit (4) respectively, described adjusting bolt (3) and mass block (5) are for being threaded, in the blind hole that the insertion shoulder guard exterior edge face, top of described adjusting bolt one end has, constituting by rotation adjusting bolt (3) provides different precompressions to two absorbing unit, reaches the structure of regulating the dynamic vibration absorber natural frequency.
2. a kind of frequency-adjustable dynamic vibration absorber according to claim 1 is characterized in that: the junction plane of described shoulder guard (6) and absorbing unit (4), absorbing unit (4) all adopt cold adhesive bonding way or bonding hot vulcanization mode to be fastenedly connected with the junction plane of riser (7).
3. a kind of frequency-adjustable dynamic vibration absorber according to claim 1 is characterized in that: the both sides of described base (1) have the mounting hole that is connected with matrix in order to convenient.
4. a kind of frequency-adjustable dynamic vibration absorber according to claim 1, it is characterized in that: described absorbing unit (4) is the vulcanized rubber piece.
5. a kind of frequency-adjustable dynamic vibration absorber according to claim 1, it is characterized in that: described mass block (5) is lead or bloom, and the sectional shape of described mass block (5) is " recessed " type or " U " type.
6. a kind of frequency-adjustable dynamic vibration absorber according to claim 1 is characterized in that: have on the sidewall of the described groove of mass block (5) in order to the interior threaded hole of regulating bolt (3) screw-thread fit.
7. a kind of frequency-adjustable dynamic vibration absorber according to claim 1, it is characterized in that: an end of described adjusting bolt (3) is nut, the top of the other end for cooperating with blind hole that the shoulder guard exterior edge face has.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320129345 CN203161947U (en) | 2013-03-21 | 2013-03-21 | Frequency-adjustable dynamic vibration absorber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320129345 CN203161947U (en) | 2013-03-21 | 2013-03-21 | Frequency-adjustable dynamic vibration absorber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203161947U true CN203161947U (en) | 2013-08-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320129345 Expired - Lifetime CN203161947U (en) | 2013-03-21 | 2013-03-21 | Frequency-adjustable dynamic vibration absorber |
Country Status (1)
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| CN (1) | CN203161947U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104696407A (en) * | 2015-02-13 | 2015-06-10 | 柳州金鸿橡塑有限公司 | Rear axle mass shock absorber |
| CN105134851A (en) * | 2015-08-27 | 2015-12-09 | 重庆长安汽车股份有限公司 | Power vibration absorber with directionally adjustable frequency |
| CN105333047A (en) * | 2015-09-15 | 2016-02-17 | 浙江吉利汽车研究院有限公司 | Dynamic vibration absorber |
| CN105387922A (en) * | 2015-10-19 | 2016-03-09 | 重庆长安汽车股份有限公司 | Device and method for testing vibration absorber frequency |
| CN107023736A (en) * | 2017-04-28 | 2017-08-08 | 拓卡奔马机电科技有限公司 | A kind of stiffness-adjustable frame foot pad |
-
2013
- 2013-03-21 CN CN 201320129345 patent/CN203161947U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104696407A (en) * | 2015-02-13 | 2015-06-10 | 柳州金鸿橡塑有限公司 | Rear axle mass shock absorber |
| CN105134851A (en) * | 2015-08-27 | 2015-12-09 | 重庆长安汽车股份有限公司 | Power vibration absorber with directionally adjustable frequency |
| CN105333047A (en) * | 2015-09-15 | 2016-02-17 | 浙江吉利汽车研究院有限公司 | Dynamic vibration absorber |
| CN105387922A (en) * | 2015-10-19 | 2016-03-09 | 重庆长安汽车股份有限公司 | Device and method for testing vibration absorber frequency |
| CN105387922B (en) * | 2015-10-19 | 2019-04-09 | 重庆长安汽车股份有限公司 | A kind of device and method for testing bump leveller frequency |
| CN107023736A (en) * | 2017-04-28 | 2017-08-08 | 拓卡奔马机电科技有限公司 | A kind of stiffness-adjustable frame foot pad |
| CN107023736B (en) * | 2017-04-28 | 2019-05-03 | 拓卡奔马机电科技有限公司 | A kind of stiffness-adjustable rack foot pad |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130828 |