CN219107216U - Vibration isolator, motor support assembly and air conditioner external unit - Google Patents
Vibration isolator, motor support assembly and air conditioner external unit Download PDFInfo
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- CN219107216U CN219107216U CN202320445275.0U CN202320445275U CN219107216U CN 219107216 U CN219107216 U CN 219107216U CN 202320445275 U CN202320445275 U CN 202320445275U CN 219107216 U CN219107216 U CN 219107216U
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Abstract
The utility model relates to an isolator, motor support assembly and outer machine of air conditioner, wherein, the isolator includes interval arrangement and relative height-adjustable's upper supporting plate and lower backup pad, and sets up at least two relatively arranged's between upper supporting plate and the lower backup pad guide arm subassembly, guide arm subassembly includes rotationally to the first guide arm of upper supporting plate and rotationally to the second guide arm of lower backup pad, first guide arm with the second guide arm articulates mutually, and two relative arrangement be connected with positive rigidity mechanism and negative rigidity mechanism between the guide arm subassembly, positive rigidity mechanism with negative rigidity mechanism is configured respectively and can follow the upper supporting plate reciprocates and produce deformation. Therefore, the vibration isolator has high bearing capacity and low natural frequency, widens the frequency range of vibration isolation, can generate better vibration isolation effect, and effectively solves the bottleneck problem of passive vibration isolation.
Description
Technical Field
The disclosure relates to the technical field of vibration reduction and noise reduction, in particular to a vibration isolator, a motor bracket assembly and an air conditioner external unit.
Background
Along with the improvement of living standard, people have higher and higher requirements on air conditioner noise, especially the noise generated by the vibration of the axial flow fan motor of the air conditioner transmitted to the outer machine shell of the air conditioner, so that the user experience of using the air conditioner is greatly influenced.
In the related art, the deformation of the top cover plate after trampling and the vibration of the motor bracket and the top cover plate are relieved by installing the sponge liner on the motor bracket, and the vibration isolation mode has the vibration isolation effect only when the excitation frequency is greater than the natural frequency which is ≡2 times, and the bearing capacity of the sponge liner is low, so that the top cover plate is easy to damage under the action of the gravity of an object on the top cover plate. In addition, along with the improvement of the motor rotation speed, the noise of the air conditioner outer machine shell caused by the vibration of the motor bracket cannot be well slowed down only by buffering and damping through the material property of the sponge.
Disclosure of Invention
In order to overcome the problems in the related art, the present disclosure provides a vibration isolator, a motor bracket assembly, and an air conditioner external unit.
According to a first aspect of embodiments of the present disclosure, there is provided a vibration isolator including upper and lower support plates arranged at intervals and having a relatively adjustable height, and at least two guide bar assemblies arranged between the upper and lower support plates, the guide bar assemblies including a first guide bar rotatably connected to the upper support plate and a second guide bar rotatably connected to the lower support plate, the first guide bar being hinged to the second guide bar, a positive stiffness mechanism and a negative stiffness mechanism being connected between the two guide bar assemblies arranged opposite to each other, the positive stiffness mechanism and the negative stiffness mechanism being configured to be capable of deforming with up and down movement of the upper support plate, respectively.
Optionally, the positive stiffness mechanism comprises at least one first elastic component, and two ends of the first elastic component are respectively connected to the hinge positions of the first guide rod and the second guide rod in the two oppositely arranged guide rod assemblies.
Optionally, the end of the first guide rod connected to the upper support plate and/or the end of the second guide rod connected to the lower support plate in the two opposite guide rod assemblies has a connecting portion, and the negative stiffness mechanism includes at least one second elastic member, and two ends of the second elastic member are respectively connected to the two opposite connecting portions.
Optionally, the connecting portion is rotatably connected with the first guide bar and/or the second guide bar within a preset angle range.
Optionally, the preset angle ranges from 0 ° to 10 °.
Optionally, the connecting portion is configured as an L-shaped structure, a first section of the L-shaped structure is configured to be connected to the second elastic member and is disposed parallel to the upper support plate or the lower support plate, and a second section of the L-shaped structure is obliquely connected between the first section and the first guide rod or the second guide rod.
Optionally, the vibration isolator comprises at least four guide rod assemblies, and the guide rod assemblies are uniformly distributed in the circumferential direction of the vibration isolator.
Optionally, the top fixedly connected with roof of upper supporting plate, the bottom fixedly connected with bottom plate of lower backup pad, the roof with connect through slide bar spout mechanism between the bottom plate, so that the roof for the bottom plate height-adjustable.
Optionally, the sliding rod sliding groove mechanism comprises two sliding grooves which are respectively arranged on the side walls of the top plate and the bottom plate and extend parallel to the plate surface, and two sliding rods which are arranged in a crossing manner, and two ends of each sliding rod are respectively arranged in the two sliding grooves in a sliding manner.
Optionally, the number of the sliding rod sliding groove mechanisms is at least two, and one sliding rod sliding groove mechanism and the other sliding rod sliding groove mechanism are oppositely arranged.
According to a second aspect of embodiments of the present disclosure, there is provided a motor bracket assembly including a motor bracket body and the vibration isolator described above connected to the motor bracket body.
Optionally, the lower support plate is connected with a connecting lug, and the connecting lug is connected to the motor bracket body through a fastener.
According to a third aspect of embodiments of the present disclosure, there is provided an air conditioner external unit including a top cover and the above motor bracket assembly, the upper support plate being connected to the top cover.
The technical scheme provided by the embodiment of the disclosure can comprise the following beneficial effects: and connecting the positive stiffness mechanism with positive stiffness characteristic and the negative stiffness mechanism with negative stiffness characteristic in parallel to form the quasi-zero stiffness vibration isolator with high static stiffness and low dynamic stiffness characteristic. The rigidity of the vibration isolator can change along with the compression amount, and the vibration isolator has high static rigidity to ensure high bearing capacity in the zero load state, and the dynamic rigidity of the vibration isolator is greatly reduced when the load compresses the vibration isolator to a static balance position, so that the vibration isolator has high bearing capacity and low natural frequency, the frequency range of vibration isolation is widened, better vibration isolation effect can be generated, and the bottleneck problem of passive vibration isolation is effectively solved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure.
Fig. 1 is a schematic view of a structure of a vibration isolator according to an exemplary embodiment;
figure 2 is a front view of an isolator shown in accordance with an exemplary embodiment;
figure 3 is a schematic diagram illustrating the disassembly of a vibration isolator according to an exemplary embodiment;
figure 4 is a schematic illustration of a vibration isolator with top and bottom plates removed according to an exemplary embodiment;
figure 5 is a schematic diagram showing a second configuration of the vibration isolator with the top and bottom plates removed in accordance with an exemplary embodiment;
figure 6 is a front view of the vibration isolator shown with the top and bottom plates removed according to an exemplary embodiment;
FIG. 7 is a schematic illustration of a motor mount assembly according to an exemplary embodiment;
FIG. 8 is a schematic diagram illustrating the disassembly of a motor bracket assembly and a top cover in an air conditioner outdoor unit according to an exemplary embodiment;
fig. 9 is a graph of load versus deflection for an isolator according to an exemplary embodiment.
Description of the reference numerals
1 upper support plate 2 lower support plate
3 first guide rod of guide rod assembly 31
32 second guide rod 33 connecting portion
4 first elastic member 5 second elastic member
61 roof 62 floor
71 chute 72 slide bar
8 motor support body 9 top cap
10 vibration isolator
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present disclosure as detailed in the accompanying claims.
In the present disclosure, unless otherwise indicated, the use of the terms "upper" and "lower" are defined based on the directions in which the relevant components are actually used. The terms "inner" and "outer" are used with respect to the outline of the corresponding component, and furthermore, the terms "first", "second", etc. are used in this disclosure to distinguish one element from another without order or importance.
When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated.
Referring to fig. 1 to 9, the present disclosure provides a vibration isolator 10, which may include upper and lower support plates 1 and 2 arranged at intervals and having a relatively adjustable height, and at least two guide bar assemblies 3 arranged opposite to each other and disposed between the upper and lower support plates 1 and 2, and the guide bar assemblies 3 may include a first guide bar 31 rotatably connected to the upper support plate 1 and a second guide bar 32 rotatably connected to the lower support plate 2, the first guide bar 31 being hinged to the second guide bar 32, and a positive stiffness mechanism and a negative stiffness mechanism being connected between the two oppositely arranged guide bar assemblies 3, the positive stiffness mechanism and the negative stiffness mechanism being configured to be capable of being deformed with up-and-down movement of the upper support plate 1, respectively.
The quasi-zero stiffness vibration isolator is formed by connecting a positive stiffness mechanism and a negative stiffness mechanism in parallel, as shown in fig. 9, wherein F is the load of the vibration isolator, X is the deformation of the positive stiffness mechanism and the negative stiffness mechanism, and the vibration isolator is subjected to the action of a bearing mass M under the action of X e In a static equilibrium position. At X Q In-range clothThe negative stiffness mechanism is arranged to ensure that the whole vibration isolator is arranged at the X-ray position e Near the vibration isolator has the characteristic of quasi-zero rigidity, the total rigidity of the vibration isolator tends to 0, so that the natural frequency of the vibration isolator is reduced, and the vibration isolation performance is optimized.
Specifically, the natural frequency of the single degree of freedom vibration isolator is:
k+ is the rigidity coefficient of the positive rigidity mechanism, K-is the rigidity coefficient of the negative rigidity mechanism, and M is the load mass of the vibration isolator. Due to the fact that X e In the static balance position, the rigidity K of the negative rigidity mechanism<0, so k=k + +K _ <K + Wherein K is the total stiffness matrix of the vibration isolator, so there is
w n1 Is the natural frequency of the positive stiffness mechanism. Therefore, the natural frequency of the vibration isolator is effectively reduced through the parallel negative stiffness mechanism, and the vibration isolator has the function of vibration isolation and vibration reduction in a wide frequency domain.
Through the technical scheme, the positive stiffness mechanism with positive stiffness characteristic and the negative stiffness mechanism with negative stiffness characteristic are connected in parallel to form the quasi-zero stiffness vibration isolator with high static stiffness and low dynamic stiffness characteristic. The rigidity of the vibration isolator can change along with the compression amount, and the vibration isolator has high static rigidity (bearing rigidity) to ensure high bearing capacity in the zero load state, and the dynamic rigidity of the vibration isolator is greatly reduced when the load compresses the vibration isolator to a static balance position, so that the vibration isolator has high bearing capacity and low natural frequency, the frequency range of vibration isolation is widened, better vibration isolation effect can be generated, and the bottleneck problem of passive vibration isolation is effectively solved.
As an exemplary embodiment of the present disclosure, referring to fig. 4 to 6, the positive stiffness mechanism may include at least one first elastic member 4, and both ends of the first elastic member 4 are connected to the hinge points of the first guide bar 31 and the second guide bar 32 in the two guide bar assemblies 3 disposed opposite to each other, respectively. In an embodiment of the present disclosure, the first elastic member 4 may be an extension spring. The upper support plate 1 moves downward under the load, and at this time, the hinge points of the first guide rod 31 and the second guide rod 32 in the two guide rod assemblies 3 arranged opposite to each other move away from each other, and the distance between the hinge points becomes large, so that the first elastic member 4 is stretched to deform.
In some embodiments, the end of the first guide bar 31 connected to the upper support plate 1 and the end of the second guide bar 32 connected to the lower support plate 2 in two oppositely arranged guide bar assemblies 3, or one of the two ends has a connection 33, and the negative stiffness mechanism may include at least one second elastic member 5, both ends of the second elastic member 5 being connected to the two oppositely arranged connection 33, respectively. In an embodiment of the present disclosure, the second elastic member 5 may be a pre-compressed spring, and further, the second elastic member 5 may be a disc spring. As shown in fig. 4, the upper support plate 1 moves downward under the load, the first guide rods 31 in the two opposite guide rod assemblies 3 rotate in the direction away from each other, the second guide rods 32 in the two opposite guide rod assemblies 3 also rotate in the direction away from each other, and the first guide rods 31 and the second guide rods 32 can drive the connecting portions 33 to rotate, so that the two opposite connecting portions 33 rotate in the direction away from each other, and the second elastic member 5 is stretched to deform.
Further, the connection portion 33 is rotatably connected with the first and second guide bars 31 and 32 or one of the first and second guide bars 31 and 32 within a preset angle range. The first guide rod 31 or the second guide rod 32 can drive the connecting part 33 to move when rotating, the connecting part 33 is rotatably connected with the first guide rod 31 or the second guide rod 32 within a preset angle range, and the fact that the upper bevel angle of the connecting part 33 is too large can be prevented, and the second elastic part 5 is pulled to generate bending deformation.
Still further, the preset angle range may be 0 ° -10 °, in the embodiment of the present disclosure, the locking angle between the first guide bar 31 or the second guide bar 32 and the connecting portion 33 is 10 °, when the angle between the first guide bar 31 or the second guide bar 32 and the connecting portion 33 is 10 °, the connecting portion 33 can rotate along with the first guide bar 31 or the second guide bar 32, and when the angle between the first guide bar 31 or the second guide bar 32 and the connecting portion 33 is less than 10 °, the second elastic member 5 does not deform, and the bearing capability of the positive stiffness mechanism is mainly exerted.
Wherein, referring to fig. 6, the connection part 33 may be constructed in an L-shaped structure, a first section of which is for connection to the second elastic member 5 and is disposed in parallel with the upper support plate 1 or the lower support plate 2, and a second section of which is connected between the first section and the first guide bar 31 or the second guide bar 32 in an inclined manner. The structure of the connection portion 33 is not limited by the present disclosure.
According to some embodiments, referring to fig. 4, vibration isolator 10 may include at least four guide rod assemblies 3, and are evenly distributed in the circumferential direction of vibration isolator 10. In the embodiment of the present disclosure, the vibration isolator 10 includes four guide bar assemblies 3, wherein a positive stiffness mechanism and a negative stiffness mechanism are connected between two opposing guide bar assemblies 3 of one set, and the other opposing guide bar assemblies 3 do not have a connecting portion 33. Four guide rod assemblies 3 are arranged in the circumferential direction of the vibration isolator 10, so that the upper support plate 1 and the lower support plate 2 can move more stably along the extending direction perpendicular to the plate surface, and further the first elastic part 4 and the second elastic part 5 cannot bend and deform in the stretching process.
According to an embodiment of the present disclosure, referring to fig. 1 to 3, a top plate 61 may be fixedly connected to the top of the upper support plate 1, a bottom plate 62 may be fixedly connected to the bottom of the lower support plate 2, and the top plate 61 and the bottom plate 62 may be connected through a slide bar sliding chute mechanism, so that the top plate 61 may be height-adjustable with respect to the bottom plate 62. Further, the top plate 61 is larger than the upper support plate 1, the bottom plate 62 is larger than the lower support plate 2, and the top plate 61 and the bottom plate 62 can be moved more stably by the slide bar chute mechanism.
Further, referring to fig. 1, the slide bar and chute mechanism may include two slide bars 71 disposed on side walls of the top plate 61 and the bottom plate 62, respectively, extending parallel to the plate surface, and two slide bars 72 disposed crosswise, and both ends of each slide bar 72 are slidably disposed in the two slide bars 71, respectively. The two slide bars 72 have the same length, and the sliding of the slide bars 72 in the slide grooves 71 can limit the movement of the slide grooves 71 along the direction perpendicular to the extending direction of the plate surface. It should be noted that the structure of the sliding rod sliding slot mechanism is not limited to this, and all fall within the protection scope of the present disclosure.
In some embodiments, referring to fig. 3, the number of slide bar slide groove mechanisms may be at least two, with one slide bar slide groove mechanism disposed opposite the other slide bar slide groove mechanism. By this arrangement, the two opposing slide grooves 71 are each moved in the direction perpendicular to the plate surface, so that the top plate 61 can always be moved in the direction perpendicular to the plate surface.
According to a second aspect of the present disclosure, there is also provided a motor bracket assembly, which may include the motor bracket body 8 and the vibration isolator 10 described above connected to the motor bracket body 8, with reference to fig. 7. The vibration isolator 10 is arranged on the motor support body 8, so that the bearing capacity of the motor support can be improved, and the vibration isolation frequency range of the motor support assembly can be widened. The motor bracket assembly has all the beneficial effects of the vibration isolator and is not repeated here.
Further, the lower support plate 2 may be connected with a connection lug connected to the motor bracket body 8 by a fastener. Specifically, a plurality of connection lugs are provided on the bottom plate 62 of the vibration isolator 10 in the circumferential direction, threaded holes are provided on the connection lugs, mounting holes corresponding to the threaded holes on the connection lugs are provided on the motor bracket body 8, and then the vibration isolator 10 is mounted to the motor bracket body 8 by bolts.
According to a third aspect of the present disclosure, there is also provided an air conditioner external unit, which may include the top cover 9 and the above-described motor bracket assembly, with reference to fig. 8, and the upper support plate 1 is connected to the top cover 9. The vibration isolator 10 is arranged between the top cover 9 and the motor bracket body 8, and the force transmissibility between the motor bracket body 8 and the top cover 9 is reduced through the vibration isolator 10, so that the vibration of the motor body 8 and the top cover 9 is slowed down, and the vibration isolation and noise reduction of an air conditioner external unit are realized. The air conditioner external unit not only can improve the bearing capacity of the motor support body 8 and the top cover 9, but also can widen the vibration isolation frequency range of the motor support assembly, and can slow down the influence of the vibration of the air conditioner axial flow fan motor on the noise of the air conditioner external unit. The air conditioner external unit has all the beneficial effects of the motor bracket assembly and the vibration isolator, and is not repeated here.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure. This disclosure is intended to cover any adaptations, uses, or adaptations of the disclosure following the general principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It is to be understood that the present disclosure is not limited to the precise arrangements and instrumentalities shown in the drawings, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (13)
1. The utility model provides a vibration isolator, its characterized in that includes interval arrangement and relative height-adjustable's upper supporting plate and lower backup pad, and set up at least two guide arm subassemblies of relative arrangement between upper supporting plate and the lower backup pad, guide arm subassembly includes rotationally connects to the first guide arm of upper supporting plate and rotationally connects to the second guide arm of lower backup pad, first guide arm with the second guide arm articulates mutually, two relative arrangement be connected with positive rigidity mechanism and negative rigidity mechanism between the guide arm subassembly, positive rigidity mechanism and negative rigidity mechanism are configured respectively and can produce deformation along with upper supporting plate's reciprocates.
2. The vibration isolator according to claim 1, wherein the positive stiffness mechanism comprises at least one first elastic member, both ends of the first elastic member being connected to the hinge points of the first guide rod and the second guide rod in two oppositely arranged guide rod assemblies, respectively.
3. The vibration isolator according to claim 1, wherein the end of the first guide rod connected to the upper support plate and/or the end of the second guide rod connected to the lower support plate of two oppositely arranged guide rod assemblies has a connecting portion, and the negative stiffness mechanism comprises at least one second elastic member, both ends of which are respectively connected to the two oppositely arranged connecting portions.
4. A vibration isolator according to claim 3, wherein the connecting portion is rotatably connected to the first guide bar and/or the second guide bar within a predetermined angular range.
5. The vibration isolator according to claim 4, wherein the predetermined angle is in the range of 0 ° -10 °.
6. A vibration isolator according to claim 3, wherein the connecting portion is configured as an L-shaped structure, a first section of the L-shaped structure being adapted to be connected to the second elastic member and being disposed in parallel with the upper support plate or the lower support plate, and a second section of the L-shaped structure being connected obliquely between the first section and the first guide bar or the second guide bar.
7. The vibration isolator according to claim 1, wherein the vibration isolator comprises at least four of the guide bar assemblies and is uniformly distributed in a circumferential direction of the vibration isolator.
8. The vibration isolator according to any one of claims 1 to 7, wherein a top plate is fixedly connected to a top portion of the upper support plate, a bottom plate is fixedly connected to a bottom portion of the lower support plate, and the top plate and the bottom plate are connected by a slide bar chute mechanism, so that the top plate is height-adjustable with respect to the bottom plate.
9. The vibration isolator according to claim 8, wherein the slide bar and slide groove mechanism comprises two slide bars disposed on the side walls of the top plate and the bottom plate, respectively, and extending parallel to the plate surface, and two slide bars disposed in a crossing manner, and both ends of each slide bar are disposed in the two slide grooves, respectively.
10. The vibration isolator according to claim 8, wherein the number of slide bar and slide groove mechanisms is at least two, and wherein one slide bar and slide groove mechanism is disposed opposite the other slide bar and slide groove mechanism.
11. A motor bracket assembly comprising a motor bracket body and the vibration isolator according to any one of claims 1-10 attached to the motor bracket body.
12. The motor bracket assembly of claim 11, wherein the lower support plate is connected with a connection lug, the connection lug being connected to the motor bracket body by a fastener.
13. An air conditioner external unit comprising a top cover and the motor bracket assembly according to claim 11 or 12, the upper support plate being connected to the top cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320445275.0U CN219107216U (en) | 2023-03-08 | 2023-03-08 | Vibration isolator, motor support assembly and air conditioner external unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320445275.0U CN219107216U (en) | 2023-03-08 | 2023-03-08 | Vibration isolator, motor support assembly and air conditioner external unit |
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| CN219107216U true CN219107216U (en) | 2023-05-30 |
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| CN202320445275.0U Active CN219107216U (en) | 2023-03-08 | 2023-03-08 | Vibration isolator, motor support assembly and air conditioner external unit |
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