CN210118409U - Vibration damping actuator - Google Patents
Vibration damping actuator Download PDFInfo
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- CN210118409U CN210118409U CN201920878072.4U CN201920878072U CN210118409U CN 210118409 U CN210118409 U CN 210118409U CN 201920878072 U CN201920878072 U CN 201920878072U CN 210118409 U CN210118409 U CN 210118409U
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Abstract
The utility model relates to a damping technical field specifically discloses a damping actuator, and this damping actuator includes at least two sets of damping subassemblies, and the damping subassembly includes: a motor; the transmission assembly is connected with an output shaft of the motor; the motor can drive the two mass blocks to rotate simultaneously through the transmission assembly, the rotation directions of the two mass blocks are opposite, the rotation speeds of the two mass blocks are equal, the two mass blocks of the first group of vibration reduction assemblies and the rotation centers of the two mass blocks are symmetrically arranged around a first plane, and therefore the output vibration reduction force of the first group of vibration reduction assemblies is along the first plane; the two mass blocks of the second group of vibration reduction assemblies and the rotation centers of the two mass blocks are symmetrically arranged around a second plane, so that the vibration reduction force output by the second group of vibration reduction assemblies is along the second plane; the first plane is parallel to the second plane, the magnitude of the vibration reduction force output by the vibration reduction actuator can be adjusted only by adjusting the rotating speeds of the two motors, and the output sine actuating force can be multiplied and continuously adjusted.
Description
Technical Field
The utility model relates to a damping field especially relates to a damping actuator.
Background
In a vibration environment, a vibration damping actuator is generally installed to damp vibration of a vibration member so as to change a vibration state of the vibration member.
Current damping actuator, damping actuator with adjustable support spring as disclosed in the earlier stage patent of application number CN200920087710.7, this damping actuator includes the damping actuator main part, the connecting seat, suspension spring, spring housing and adjust knob, the suspension spring cover is put in the damping actuator main part, the spring housing is located suspension spring's upside, and the cover is put on the piston rod of damping actuator main part, adjust knob is located suspension spring's downside, and with damping actuator main part threaded connection, be provided with the screw thread in the connecting seat, this connecting seat is through its screw thread and damping actuator main part lower extreme threaded connection, damping actuator's damping performance accessible adjust knob, can also adjust through swivelling joint seat. However, the vibration damping actuator adopts a passive adjustment mode, cannot completely eliminate the vibration of the vibration component, has a limited adjustment range of vibration damping performance, and needs manual adjustment.
Also disclosed in the earlier patent with application number of cn201120207669.x is a damping force adjustable piston assembly for a vibration damping actuator, which comprises a piston valve assembly and a hollow piston rod, wherein the piston valve assembly and the hollow piston rod extend into a working cylinder of the vibration damping actuator, the upper end of the hollow piston rod is connected with an upper hanging ring of the vibration damping actuator, the lower end of the hollow piston rod is connected with the piston valve assembly, a radial small hole which is communicated with an upper cavity and a lower cavity of the working cylinder of the vibration damping actuator and is communicated with a central hole of the hollow piston rod is arranged at the lower part of the hollow piston rod, a movable valve rod is arranged in the central hole, and a damping adjusting. The vibration reduction actuator also adopts a passive adjustment mode, the vibration of a vibration part cannot be completely eliminated, the adjustment range of the vibration reduction performance is limited, and manual adjustment is needed.
An adjustable hydraulic damping actuator, as disclosed in the earlier patent application No. CN200710069026.1, comprises a guide, a sealing ring and a sealing ring cap. Wherein, the director has a counter bore with the working cylinder link, and this terminal surface radially has a plurality of grooves, and the groove depth is the same with the degree of depth of counter bore, and the thickness of sealing ring is less than the hole height of sealing ring block, and the sealing ring is arranged in the counter bore of director, and after the sealing ring block impressed the counter bore of director, but the sealing ring should the oscilaltion in the counter bore of director. The vibration reduction actuator also adopts a passive adjustment mode, the vibration of a vibration part cannot be completely eliminated, the adjustment range of the vibration reduction performance is limited, and manual adjustment is needed.
Therefore, there is a need for a vibration damping actuator to solve the above problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a: the vibration reduction actuator is provided to solve the problems that the adjustment range of the vibration reduction performance of the vibration reduction actuator in the prior art is limited and manual adjustment is needed.
In one aspect, the utility model provides a damping actuator, this damping actuator include at least two sets of damping subassemblies, the damping subassembly includes:
a motor;
the output shaft of the motor is in transmission connection with the transmission assembly;
the transmission assemblies are respectively in transmission connection with the two mass blocks, the motor can drive the two mass blocks to rotate simultaneously through the transmission assemblies, the rotation directions of the two mass blocks are opposite, the rotation speeds of the two mass blocks are equal, the rotation centers of the two mass blocks and the two mass blocks of the first group of the vibration damping assemblies are symmetrically arranged about a first plane, the rotation centers of the two mass blocks and the two mass blocks of the second group of the vibration damping assemblies are symmetrically arranged about a second plane, and the first plane is parallel to the second plane.
Preferably, the vibration damping assembly further comprises two connecting pieces, the two connecting pieces are in one-to-one correspondence with the two mass blocks, each mass block is arranged on the corresponding connecting piece, and the transmission assembly is connected with the two connecting pieces respectively.
Preferably, each of the connecting members is detachably connected to the corresponding mass block.
Preferably, the transmission assembly is a gear transmission assembly.
Preferably, the transmission assembly comprises a driving wheel mounted on an output shaft of the motor, an idler wheel and a driven wheel which are meshed with the driving wheel, and another driven wheel which is meshed with the idler wheel, and the two driven wheels are respectively and coaxially connected with the two connecting pieces in a one-to-one correspondence manner.
Preferably, the vibration reduction assembly further comprises a casing, the motor is fixedly mounted on the casing, and the two connecting pieces and the idler wheel are rotatably arranged on the casing.
Preferably, the casing includes a first side and a second side that are disposed opposite to each other, an output shaft of the motor is inserted into the casing, the motor is located at the first side of the casing, and the driving wheel, the idle wheel, and the two driven wheels are located at the second side of the casing.
Preferably, the vibration damping assembly further comprises a main housing and an end cover, wherein the main housing is provided with an accommodating cavity, the casing is located in the accommodating cavity and detachably connected with the main housing, and the end cover is connected with the main housing and seals an opening of the accommodating cavity.
Preferably, the number of the vibration reduction assemblies is two, the two vibration reduction assemblies are arranged oppositely, and the main shells of the two vibration reduction assemblies are integrally arranged.
Preferably, the first plane and the second plane coincide.
The utility model has the advantages that:
when the two mass blocks of the first group of vibration reduction assemblies rotate, two component forces of the two mass blocks in the direction vertical to the first plane are offset, only two component forces in the direction along the first plane remain, when the two mass blocks of the second group of vibration reduction assemblies rotate, two component forces of the two mass blocks in the direction vertical to the second plane are offset, only two component forces in the direction along the second plane remain, and because the first plane and the second plane are arranged in parallel, when the vibration reduction actuator is installed on a vibration part, the size of the vibration reduction force output by the vibration reduction actuator can be adjusted only by controlling the rotating speeds of two motors in the two groups of vibration reduction assemblies, and further the problems of low manual adjustment efficiency and no guarantee of precision are avoided.
Drawings
Fig. 1 is a schematic structural view of a vibration damping actuator according to an embodiment of the present invention;
FIG. 2 is a schematic view of a vibration damping assembly in the vibration damping actuator of FIG. 1;
FIG. 3 is a schematic view of the operation of the vibration reducing actuator of FIG. 1;
fig. 4 is a graph showing a relationship between an output damping force and a phase angle of a mass in the damping actuator shown in fig. 1.
In the figure:
1. a motor;
2. an idler pulley;
3. a driving wheel;
4. a driven wheel;
5. a mass block;
6. a connecting member;
7. a case; 71. mounting grooves;
8. an end cap;
9. a main housing; 91. an accommodating cavity;
10. and a gear cover.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
Referring to fig. 1 and 2, the present embodiment provides a vibration damping actuator, which includes two sets of vibration damping assemblies, namely a first set of vibration damping assemblies and a second set of vibration damping assemblies, wherein the first set of vibration damping assemblies and the second set of vibration damping assemblies are identical in structure.
Taking the first group of vibration damping assemblies as an example, the vibration damping assemblies each include a motor 1, a transmission assembly, and two masses 5. The output end of the motor 1 is connected with the transmission assembly, and the transmission assembly is connected with the two mass blocks 5, so that the motor 1 can drive the two mass blocks 5 to rotate simultaneously through the transmission assembly. The two masses 5 have the same mass, and the two masses 5 are arranged side by side. And the two masses 5 can be rotated with the same radius of rotation, with the same rotational speed and in opposite rotational directions.
In this embodiment, the two masses 5 of the first group of damping assemblies and the rotation centers of the two masses 5 are both symmetrically arranged about the first plane, and the two masses 5 of the second group of damping assemblies and the rotation centers of the two masses 5 are both symmetrically arranged about the second plane, so that when the two masses 5 of the first group of damping assemblies rotate, two component forces of the two masses 5 in a direction perpendicular to the first plane can cancel each other, and only a resultant force in the direction along the first plane remains. When the two masses 5 of the second group of damping assemblies rotate, the two component forces of the two masses 5 in the direction perpendicular to the second plane can cancel each other out, and only the resultant force in the direction along the second plane remains. In this embodiment, the first plane is parallel to the second plane, and the resultant force directions of the two masses 5 of the two sets of damping assemblies are the same. Therefore, when the vibration reduction actuator is arranged on the vibration part, the vibration reduction force output by the vibration reduction actuator is matched with the vibration amplitude of the vibration part by adjusting the rotating speed of the two mass blocks 5 in each group of vibration reduction assemblies according to the change of the vibration amplitude of the vibration part.
It will be understood that the initial phase angles at which the two masses 5 of each group of damping assemblies start to rotate are equal, so that when the two masses 5 of the same group of damping assemblies rotate simultaneously, the directions of the resultant forces of the two masses 5 are always along the planes of symmetry of the two masses 5. And, through adjusting the quality piece 5 in two sets of damping assemblies to begin to rotate with different initial phase angles respectively, also can adjust the damping force size that the damping actuator finally outputs.
In this embodiment, the first plane and the second plane are both along the vertical direction, and when the vibration damping actuator is installed on the vibration component, the vibration damping force of the vibration component in the vertical direction may be performed, and of course, the first plane may be set to other directions according to actual needs, which is not limited in this embodiment.
Optionally, the first plane and the second plane coincide. Of course, the first plane may be spaced apart from the second plane.
It should be noted that the number of the damping assemblies may be set to be more groups according to actual needs, and the two masses 5 in each damping assembly may be symmetrically arranged about the first plane or a plane parallel to the first plane. Of course, in each group of damping assemblies, the number of the mass blocks 5 is not limited to two, and may be set to be more, but needs to be even number, each two of the more mass blocks 5 are divided into one group, the two mass blocks 5 in each group are set according to the setting mode when the number of the mass blocks 5 in the damping assembly is one, and the transmission assembly can simultaneously drive the mass blocks 5 of each group to simultaneously rotate.
Optionally, the vibration damping assembly further includes two connecting members 6, the two connecting members 6 are disposed in one-to-one correspondence with the two mass blocks 5, each mass block 5 is disposed on the corresponding connecting member 6, the transmission assembly is connected to the two connecting members 6, and the transmission assembly drives the two mass blocks 5 to rotate through the two connecting members 6 under the driving of the motor 1. Preferably, each connecting piece 6 is detachably connected with the corresponding mass block 5, for example, the connecting piece 6 and the mass block 5 can be detachably connected by means of pin joint, screw connection and the like, so that the mass blocks 5 with different mass sizes can be conveniently replaced as required, and the vibration damping force output by the vibration damping actuator can be adjusted.
Optionally, the transmission assembly is a gear transmission assembly, and includes a driving wheel 3 mounted on the output shaft of the motor 1, an idle wheel 2 and a driven wheel 4 engaged with the driving wheel 3, and another driven wheel 4 engaged with the idle wheel 2, where the two driven wheels 4 are respectively connected with the two connecting pieces 6 in a one-to-one correspondence and coaxial manner. It should be noted that the transmission assembly in this embodiment may also adopt belt transmission, and certainly, gear transmission may also be set to other layout manners, and an acceleration and deceleration mechanism may also be added, as long as the motor 1 can simultaneously drive the two connecting pieces 6 to rotate in opposite directions.
Optionally, the vibration reduction assembly further comprises a casing 7, an end cover 8 and a main housing 9, the motor 1 is fixedly mounted on the casing 7, a driving wheel 3 in the gear transmission assembly is mounted on an output shaft of the motor 1, and the idler wheel 2 and the two connecting pieces 6 are rotatably connected with the casing 7. Specifically, the rotating shaft between the driven wheel 4 and the connecting piece 6 is mounted on the casing 7 through a bearing. The present embodiment can support and position the whole transmission assembly through the casing 7. An accommodating cavity 91 is formed at one end of the main casing 9, and the casing 7 is installed in the accommodating cavity 91 and detachably connected to the main casing 9 by bolts. The end cover 8 is connected with the main shell 9 through a bolt, the opening of the accommodating cavity 91 is sealed, the motor 1, the transmission assembly, the casing 7, the mass block 5 and the connecting piece 6 are all packaged in the accommodating cavity 91, and the packaged components can be protected.
In this embodiment, the casing 7 includes a first side and a second side that are disposed opposite to each other, the output shaft of the motor 1 is inserted into the casing 7, the motor 1 is located on the first side of the casing 7, and the driving wheel 3, the idle wheel 2 and the two driven wheels 4 are located on the second side of the casing 7. The space can be fully utilized through the arrangement, and the packaging volume of the vibration damping assembly is reduced. The casing 7 is also provided with a mounting groove 71 for mounting the driven wheel 4; the casing 7 is further provided with a gear cover 10 for closing the mounting groove 71.
Two sets of damping subassembly are relative in this embodiment to two main casings 9 are integrative to be set up in two sets of damping subassemblies, have reduced damping actuator's encapsulation volume greatly.
The main housing 9 is also provided with a mounting interface for connection with a vibration member.
Referring to fig. 3, the active vibration damping actuator of the present embodiment has the following vibration damping principle, in which the two upper mass blocks 5 belong to a first group of vibration damping assemblies, and the two lower mass blocks 5 belong to a second group of vibration damping assemblies. Taking the two mass blocks 5 of the first group of vibration damping assemblies as an example, the two mass blocks 5 and the rotation centers thereof are symmetrically arranged about a vertical plane, and the rotation directions are opposite, the rotation frequencies of the two mass blocks 5 are the same, the rotation radii are the same, and the masses are the same, so that when the vibration damping device works, the component forces of the two mass blocks 5 in the horizontal direction are mutually offset, and only the component forces in the vertical direction are remained, so that the vibration can be damped in the vertical direction. It should be noted that when two sets of vibration damping assemblies act simultaneously, the total resultant force output by the two sets of vibration damping assemblies can be adjusted by adjusting the initial phase angle when the two upper mass blocks 5 and the two lower mass blocks 5 start to rotate. The vibration reduction actuator in this embodiment outputs the vibration reduction force in the form of a sine wave, and thus is suitable for actively reducing the vibration of the vibration force in the form of a sine wave.
It is assumed that the resultant of the damping forces output when the upper pair of masses 5 rotate in fig. 3 is:
F1(t)＝2dmmω2sin(ωt+φ1)
the resultant of the damping forces output by the following pair of mass blocks 5 when they rotate is:
F2(t)＝2dmmω2sin(ωt+φ2)
wherein d ismIs the radius of rotation of the masses 5, m is the mass of each mass 5, ω is the angular velocity of rotation of the mass 5, t is the time at which the mass 5 starts to rotate, φ1Is the initial phase angle, phi, of the upper pair of masses 52Is the initial phase angle, F, of the next pair of masses 51(t) is the resultant force of the above rotation of the mass 5, F2(t) is the resultant force when the mass block 5 is rotated next.
Then, as shown in fig. 4, x0y is a rectangular plane coordinate system, and the total damping force output by the damping actuator is:
F(t)＝2dmmω2(sin(ωt+φ1)+sin(ωt+φ2))
suppose phi1-φ 22 θ, and
then, the total damping force output by the damping actuator is:
F(t)＝2dmmω2(sin(ωt+φ-θ)+sin(ωt+φ+θ))
＝4dmmω2cos(θ)sin(ωt+φ)
the vibration forces on the vibrating member are assumed to be:
Fout(t)＝Fsin(ωt+Φ)
wherein F is the amplitude of the vibration force of the vibration member, Fout(t) is the real-time vibration force of the vibrating part at time t, and-4 dmmω2≤F≤4dmmω2Then, to achieve active damping, only:
Φ＝φ
φ1＝φ-θ
φ2＝φ+θ
the parameters to be controlled are thus phi and theta, theta being related to the change in amplitude of the desired damping force, phi being related to the desired initial phase angle of the two pairs of masses 5. To generate an alternating force with a certain frequency and amplitude, the angular velocity ω of the rotation of the mass 5 and the initial phase angle φ of the two pairs of mass 5 are controlled1、φ2And the rotational frequency of the angular velocity of the mass 5 rotation and the frequency of the vibration force on the vibrating member are the same, thereby controlling the initial phase angles phi of the two pairs of masses 5 in a mathematical relationship1、φ2The matching of the vibration reduction force output by the active vibration reduction device and the vibration force on the vibration component can be realized.
It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A vibration damping actuator comprising at least two sets of vibration damping assemblies, said vibration damping assemblies comprising:
a motor (1);
the output shaft of the motor (1) is in transmission connection with the transmission assembly;
the vibration damping device comprises two mass blocks (5), a transmission assembly is connected with the two mass blocks (5) in a transmission mode, the motor (1) can drive the two mass blocks (5) to rotate simultaneously through the transmission assembly, the rotation directions of the two mass blocks (5) are opposite, the rotation speed is equal, a first group of two mass blocks (5) and two mass blocks (5) of the vibration damping assembly are symmetrically arranged about a first plane, a second group of two mass blocks (5) and two mass blocks (5) of the vibration damping assembly are symmetrically arranged about a second plane, and the first plane is parallel to the second plane.
2. The vibration damping actuator according to claim 1, wherein the vibration damping assembly further comprises two connecting members (6), the two connecting members (6) are disposed in one-to-one correspondence with the two masses (5), each mass (5) is disposed on the corresponding connecting member (6), and the transmission assembly is connected to the two connecting members (6), respectively.
3. Damping actuator according to claim 2, characterized in that each of said connecting members (6) is removably connected to the corresponding mass (5).
4. The vibration reducing actuator according to claim 2, wherein the transmission assembly is a gear transmission assembly.
5. The vibration damping actuator according to claim 4, wherein the transmission assembly comprises a driving wheel (3) mounted on the output shaft of the motor (1), an idler wheel (2) and a driven wheel (4) engaged with the driving wheel (3), and another driven wheel (4) engaged with the idler wheel (2), and the two driven wheels (4) are respectively coaxially connected with the two connecting pieces (6) in a one-to-one correspondence manner.
6. The vibration damping actuator according to claim 5, wherein the vibration damping assembly further comprises a casing (7), the motor (1) is fixedly mounted on the casing (7), and the two connecting members (6) and the idler (2) are rotatably arranged on the casing (7).
7. The vibration damping actuator according to claim 6, wherein the casing (7) comprises a first side and a second side which are opposite to each other, the output shaft of the motor (1) is arranged through the casing (7), the motor (1) is arranged on the first side of the casing (7), and the driving wheel (3), the idle wheel (2) and the two driven wheels (4) are arranged on the second side of the casing (7).
8. The vibration damping actuator according to claim 6, wherein the vibration damping assembly further comprises a main housing (9) and an end cap (8), the main housing (9) is provided with an accommodating cavity (91), the casing (7) is located in the accommodating cavity (91) and detachably connected with the main housing (9), and the end cap (8) is connected with the main housing (9) and closes an opening of the accommodating cavity (91).
9. The vibration damping actuator according to claim 8, wherein the number of the vibration damping modules is two, the two vibration damping modules are arranged oppositely, and the main housings (9) of the two vibration damping modules are integrally arranged.
10. The vibration damping actuator according to claim 1, wherein the first plane coincides with the second plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920878072.4U CN210118409U (en) | 2019-06-12 | 2019-06-12 | Vibration damping actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920878072.4U CN210118409U (en) | 2019-06-12 | 2019-06-12 | Vibration damping actuator |
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| Publication Number | Publication Date |
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| CN210118409U true CN210118409U (en) | 2020-02-28 |
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ID=69615610
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|---|---|---|---|
| CN201920878072.4U Active CN210118409U (en) | 2019-06-12 | 2019-06-12 | Vibration damping actuator |
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| CN (1) | CN210118409U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113153974A (en) * | 2021-04-09 | 2021-07-23 | 南京航空航天大学 | Motor direct-drive type multipurpose centrifugal actuator and working method thereof |
-
2019
- 2019-06-12 CN CN201920878072.4U patent/CN210118409U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113153974A (en) * | 2021-04-09 | 2021-07-23 | 南京航空航天大学 | Motor direct-drive type multipurpose centrifugal actuator and working method thereof |
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