CN117022139A - Noise reduction device for improving NVH of automobile - Google Patents
Noise reduction device for improving NVH of automobile Download PDFInfo
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- CN117022139A CN117022139A CN202311047136.3A CN202311047136A CN117022139A CN 117022139 A CN117022139 A CN 117022139A CN 202311047136 A CN202311047136 A CN 202311047136A CN 117022139 A CN117022139 A CN 117022139A
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- sound insulation
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- driving
- reduction device
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- 230000009467 reduction Effects 0.000 title claims abstract description 33
- 238000009413 insulation Methods 0.000 claims abstract description 108
- 238000009423 ventilation Methods 0.000 claims abstract description 83
- 230000005540 biological transmission Effects 0.000 claims abstract description 59
- 239000000428 dust Substances 0.000 claims description 21
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 7
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 7
- 241001330002 Bambuseae Species 0.000 claims description 7
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 7
- 239000011425 bamboo Substances 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims 2
- 230000000694 effects Effects 0.000 description 15
- 238000010438 heat treatment Methods 0.000 description 7
- 239000012774 insulation material Substances 0.000 description 6
- 230000017525 heat dissipation Effects 0.000 description 5
- 238000004804 winding Methods 0.000 description 5
- 229920000742 Cotton Polymers 0.000 description 4
- 239000011358 absorbing material Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005253 cladding Methods 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 229920002943 EPDM rubber Polymers 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 229920005549 butyl rubber Polymers 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000002277 temperature effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
- B60R13/08—Insulating elements, e.g. for sound insulation
- B60R13/0884—Insulating elements, e.g. for sound insulation for mounting around noise sources, e.g. air blowers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
- B01D46/103—Curved filtering elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/66—Regeneration of the filtering material or filter elements inside the filter
- B01D46/70—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
- B60R13/08—Insulating elements, e.g. for sound insulation
- B60R13/0876—Insulating elements, e.g. for sound insulation for mounting around heat sources, e.g. exhaust pipes
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- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
Abstract
The invention relates to the technical field of automobile accessories and discloses a noise reduction device for improving NVH of an automobile, which comprises two sound insulation plates, wherein a sound insulation sleeve is arranged between the two sound insulation plates, a sound insulation cavity is formed between the two sound insulation plates and the sound insulation sleeve, a plurality of first ventilation grooves are formed in the edge parts of the two sound insulation plates, one side of each first ventilation groove is communicated with a ventilation box, one side of each ventilation box is fixedly provided with a support cylinder, one side of each support cylinder is fixedly provided with a connection box, a valve assembly is arranged in each support cylinder, and a temperature sensing driving assembly is arranged in each sound insulation cavity; according to the invention, through the arrangement of the sound insulation plate and the sound insulation sleeve, noise generated by the power transmission part can be isolated, so that the noise generated by an automobile is reduced, and the temperature-sensing driving assembly drives the valve assembly to open and close, so that the power transmission part sealed in the noise reduction device can be automatically cooled under the high temperature condition.
Description
Technical Field
The invention relates to the technical field of automobile accessories, in particular to a noise reduction device for improving NVH of an automobile.
Background
The automobile NVH noise reduction device is used for controlling the noise, vibration and harshness (Noise Vibration and Harshness, NVH) of the automobile through various technical means so as to achieve the purposes of reducing noise, vibration and comfort. Common NVH noise reduction devices include: 1. soundproof material: such as soundproof cotton, soundproof felt, and the like; 2. sound absorbing material: such as sound absorbing cotton, sound absorbing felt, etc.; 3. active noise reduction technology: such as car audio systems, active noise reduction headphones, and the like; 4. passive noise reduction techniques: such as double glazing, sealing strips, etc.
Chinese patent CN209142054U discloses a sound insulation pad for improving NVH performance of an automobile, which includes a sound-absorbing material layer and a sound-insulating material layer, wherein the sound-absorbing material layer is used for absorbing noise generated when a power transmission component operates; the sound insulation material layer is arranged on the sound absorption material layer and used for preventing noise from leaking. The sound insulation pad that this embodiment provided is through with sound absorbing material layer and sound insulating material layer integrated into one piece, forms the sound insulation pad with the shell perfect match of power transmission part, so sound insulation pad can laminate completely with the shell of power transmission part, absorbs and the noise of isolated power transmission part more effectively to reach the purpose of making an uproar falls, and then promote power transmission part's NVH performance, improve automobile user's product experience.
This patent plays the effect of isolated noise through cladding sound insulating pad on the shell of power transmission part, and power transmission part includes motor, the engine etc. of car, however, when wrapping sound insulating pad on power transmission part, although playing better sound insulating effect, can influence the heat dissipation of power transmission part, especially cladding when heating serious parts such as motor, engine etc. can influence life.
Accordingly, there is a need to provide a noise reduction device for improving NVH of an automobile to solve the above-mentioned problems.
Disclosure of Invention
The invention aims to provide a noise reduction device for improving NVH of an automobile, which has the effect of automatically radiating power transmission components enclosed in the noise reduction device under the high-temperature condition.
The technical aim of the invention is realized by the following technical scheme: the utility model provides an improve noise reduction device of car NVH, includes two acoustic celotex board, two be provided with the sound-proof housing between the acoustic celotex board, form the sound-proof cavity between two acoustic celotex board and the sound-proof housing, fix power transmission part in the sound-proof cavity during the installation, two a plurality of first ventilation grooves have all been seted up on the limit portion of acoustic celotex board, one side intercommunication of first ventilation groove is provided with the ventilation box, one side fixed mounting of ventilation box has a support section of thick bamboo, one side fixed mounting of support section of thick bamboo has the connection box, be provided with valve subassembly in the support section of thick bamboo, be provided with the thermal drive subassembly in the sound-proof cavity, the thermal drive subassembly is connected with the valve subassembly transmission, and when the temperature rose in the heat-proof cavity, the thermal drive subassembly drive valve subassembly was opened, makes connection box and ventilation box intercommunication.
The invention is further provided with: the valve assembly comprises a sound insulation adjusting column, the sound insulation adjusting column is made of sound insulation materials or is filled with sound insulation materials in the sound insulation adjusting column to play a sound insulation role, a connecting shaft is fixedly arranged at the end part of the sound insulation adjusting column, the sound insulation adjusting column is rotatably arranged in a supporting cylinder through the connecting shaft, a second ventilation groove is formed in the sound insulation adjusting column and penetrates through the sound insulation adjusting column, a transmission assembly is arranged on one side of the supporting cylinder, and a temperature-sensing driving assembly is in transmission connection with the connecting shaft through the transmission assembly.
The invention is further provided with: the driving assembly comprises a driving ring, a first connecting cylinder and a connecting column, wherein the driving ring is arranged on one side of the sound insulation plate, the temperature sensing driving assembly is in transmission connection with the driving ring, one end of the connecting shaft extends out of the supporting cylinder, one end of the connecting column is fixedly connected with the connecting shaft, the other end of the connecting column extends into the first connecting cylinder, the connecting column is in sliding fit with the first connecting cylinder, and one end of the first connecting cylinder is hinged with the driving ring through a hinge.
The invention is further provided with: the thermal induction driving assembly comprises a second connecting cylinder, a thermal expansion strip and two driving columns, wherein one ends of the two driving columns penetrate through two sound insulation plates respectively and are fixedly connected with two driving rings respectively, the driving columns are in sliding fit with the sound insulation plates, the other ends of the two driving columns extend into the second connecting cylinder from two ends of the second connecting cylinder, the driving columns are in sliding fit with the second connecting cylinder, the thermal expansion strip is arranged in the second connecting cylinder, and two ends of the thermal expansion strip are fixedly connected with the two driving columns respectively.
The invention is further provided with: two the opposite lateral wall of acoustic celotex board is all fixed mounting has a plurality of bracing pieces, and a plurality of the bracing piece evenly sets up in the border position of acoustic celotex board.
The invention is further provided with: the support rod is provided with a plurality of first anti-slip protrusions, and the second connecting cylinder is provided with a plurality of second anti-slip protrusions.
The invention is further provided with: and a filter screen is fixedly arranged on one side of the second ventilation groove, and the filter screen is arranged on one side close to the hinge.
The invention is further provided with: the dust exhaust port has been seted up to one side of support section of thick bamboo, set up the third ventilation groove on the regulation post gives sound insulation, when the second ventilation groove is not linked together with the ventilation box, the second ventilation groove is linked together with the connection box through the third ventilation groove, and the filter screen is located the dust exhaust port this moment.
In summary, the invention has the following beneficial effects:
1. according to the invention, through the arrangement of the sound insulation plate and the sound insulation sleeve, noise generated by the power transmission part can be isolated, so that the noise generated by the automobile is reduced, when the automobile runs at a low speed, the heat generated by the power transmission part is less, the valve component is in a closed state, the noise reduction device can have a good sound insulation effect, the noise reduction effect is obvious, when the automobile runs at a high speed, the heat generated by the power transmission part is large, the temperature in the heat insulation cavity is increased, the temperature-sensitive driving component drives the valve component to open under the high temperature effect, the connecting box is communicated with the ventilation box, external air flow can enter the connecting box and enter the heat insulation cavity through the ventilation box and the first ventilation groove, so that the heat in the heat insulation cavity is discharged through the ventilation box at the other side, and the power transmission part is timely radiated, so that the noise reduction device is prevented from influencing the heat radiation of the power transmission part, and the power transmission part sealed in the noise reduction device can be automatically radiated under the high temperature condition by opening and closing the temperature-sensitive driving component;
2. when the sound insulation sleeve is sleeved on the support rod, the inner wall of the sound insulation sleeve is contacted with the first anti-slip bulge and the second anti-slip bulge, so that the effect of anti-slip can be achieved, the sound insulation sleeve is prevented from sliding and shifting in the winding/using process, the second anti-slip bulge is arranged, the contact area between the second connecting cylinder and air is larger, the temperature conduction efficiency of the second connecting cylinder is improved, and the high temperature in the sound insulation cavity can be quickly transferred to the thermal expansion strip, so that the thermal response speed is improved;
3. when the automobile runs at a low speed, the heating value of the power transmission part is low, the valve assembly is in a closed state, the second ventilation groove is not communicated with the ventilation box, the second ventilation groove is communicated with the connection box through the third ventilation groove, the filter screen is positioned in the dust exhaust port, air flow entering through the connection box enters the second ventilation groove through the third ventilation groove, and then is exhausted through the filter screen and the dust exhaust port, dust attached to the filter screen can be impacted under the action of the air flow, so that the filter screen is automatically cleaned, the filter screen is prevented from being blocked due to long-time use, and the filter screen can be automatically cleaned by the air flow when the heating value of the power transmission part is not large through the arrangement of the structure.
Drawings
FIG. 1 is a schematic three-dimensional structure of the present invention;
FIG. 2 is a schematic view of the three-dimensional structure of the present invention with the sound insulation jacket removed;
FIG. 3 is an enlarged schematic view of the structure of FIG. 2A according to the present invention;
FIG. 4 is an enlarged schematic view of the structure of FIG. 3B according to the present invention;
FIG. 5 is a schematic three-dimensional view of a transmission assembly according to the present invention;
FIG. 6 is a schematic three-dimensional structure of a support cylinder according to the present invention;
FIG. 7 is a schematic three-dimensional structure of a temperature-sensing driving assembly according to the present invention;
FIG. 8 is a schematic cross-sectional view of a second connecting cylinder according to the present invention;
FIG. 9 is a schematic three-dimensional view of a valve assembly according to another embodiment of the present invention;
FIG. 10 is a schematic cross-sectional view of a valve assembly according to another embodiment of the present invention.
In the figure: 1. a sound insulation board; 101. a first ventilation slot; 2. a support rod; 3. a sound insulation sleeve; 4. a ventilation box; 5. a support cylinder; 6. a sound insulation adjusting column; 601. a second ventilation slot; 602. a third ventilation slot; 7. a connecting shaft; 8. a first connecting cylinder; 801. a dust discharge port; 9. a connecting column; 10. a hinge; 11. a drive ring; 12. a drive column; 13. a second connecting cylinder; 14. a thermal expansion strip; 15. a filter screen; 16. a first cleat boss; 17. a second anti-slip protrusion; 18. and a connection box.
Detailed Description
The present invention will be further described with reference to the drawings in the embodiments of the present invention.
Referring to fig. 1 to 8, in an embodiment of the present invention, a noise reduction device for improving NVH of an automobile includes two sound insulation plates 1, a sound insulation sleeve 3 is disposed between the two sound insulation plates 1, sound insulation materials including but not limited to butyl rubber, rubber plastic, EVA/EPDM plates, sound insulation strips, foam filling, damping rubber, and soundproof cotton are disposed in the sound insulation plates 1, so as to achieve a soundproof effect, the sound insulation sleeve 3 is preferably made of soundproof cotton, a soundproof cavity is formed between the two sound insulation plates 1 and the sound insulation sleeve 3, a power transmission component is fixed in the soundproof cavity during installation, a plurality of first ventilation slots 101 are formed at edges of the two sound insulation plates 1, a ventilation box 4 is disposed on one side of the first ventilation slots 101 in a communicating manner, a supporting cylinder 5 is fixedly disposed on one side of the ventilation box 4, a connection box 18 is fixedly disposed on one side of the supporting cylinder 5, a temperature sensing driving component is disposed in the sound insulation cavity, the temperature sensing driving component is in a driving component is in transmission connection with the valve component, and when the temperature in the heat insulation cavity rises, and the temperature sensing component is opened to enable the valve driving component to be in communication with the ventilation box 18; when the automobile is installed, the power transmission part of the automobile is arranged in the sound insulation cavity, the connecting box 18 is connected with the air inlet system of the automobile, when the automobile runs, external air flow can enter the connecting box 18 through the air inlet system, noise generated by the power transmission part can be isolated through the arrangement of the sound insulation plate 1 and the sound insulation sleeve 3, noise generated by the automobile is reduced, when the automobile runs at a low speed, the valve component is in a closed state, the noise reduction device can play a better sound insulation effect, the noise reduction effect is obvious, when the automobile runs at a high speed, the heat generated by the power transmission part is large, the temperature in the heat insulation cavity is increased, the temperature-sensitive driving component is driven to open by the high-temperature action valve component, the connecting box 18 is communicated with the ventilation box 4, the external air flow can enter the connecting box 18, and enter the heat insulation cavity through the ventilation box 4 at the first ventilation groove 101, the heat in the heat insulation cavity is discharged through the ventilation box 4 at the other side, accordingly, the power transmission part is timely cooled, the noise reduction device is prevented from affecting the power transmission part, the noise reduction device can play a good sound insulation effect, the noise reduction effect is obvious, the automobile can be mainly affected by the heat dissipation effect of the automobile when the automobile runs at a low speed, the automobile is not affected by the power transmission part, the automobile is mainly, the automobile running at a high-speed, the noise reduction effect is affected by the automobile can be greatly affected by the automobile running on the high-speed, and the automobile can be running on the automobile, can obviously reduce the noise of the automobile when running in low custom.
It should be noted that, the shape of the sound insulation board 1 may be set to be circular, rectangular, etc., the shape is not limited, the shape is adapted to the shape of the power transmission component, through holes may be formed in the sound insulation board 1, so that lines, pipelines, transmission structures, etc. may extend, and when the sound insulation board is installed, through holes may be cut in the sound insulation cover 3, so that structures such as bolts may pass through to fix the power transmission component, and seal the penetrating position.
In this embodiment, preferably, the valve assembly includes a sound insulation adjusting column 6, the sound insulation adjusting column 6 is made of a sound insulation material or is filled with a sound insulation material in the sound insulation adjusting column to play a sound insulation role, a connecting shaft 7 is fixedly installed at an end of the sound insulation adjusting column 6, the sound insulation adjusting column 6 is rotatably installed in the support cylinder 5 through the connecting shaft 7, a second ventilation groove 601 is formed in the sound insulation adjusting column 6, the second ventilation groove 601 penetrates through the sound insulation adjusting column 6, a transmission assembly is arranged at one side of the support cylinder 5, and the temperature sensing driving assembly is in transmission connection with the connecting shaft 7 through the transmission assembly; two openings are formed in the support cylinder 5 and are respectively communicated with the connecting box 18 and the ventilation box 4, when the temperature in the heat insulation cavity is low, the second ventilation groove 601 is not communicated with the connecting box 18 and the ventilation box 4, and when the temperature in the heat insulation cavity is high, the temperature sensing driving assembly drives the connecting shaft 7 to rotate 90 degrees through the transmission assembly, so that the sound insulation adjusting column 6 rotates 90 degrees, and the second ventilation groove 601 is communicated with the connecting box 18 and the ventilation box 4.
In this embodiment, preferably, the transmission assembly includes a driving ring 11, a first connecting cylinder 8 and a connecting post 9, the driving ring 11 is disposed on one side of the acoustic panel 1, the thermal driving assembly is in transmission connection with the driving ring 11, one end of the connecting shaft 7 extends out of the supporting cylinder 5, one end of the connecting post 9 is fixedly connected with the connecting shaft 7, the other end of the connecting post 9 extends into the first connecting cylinder 8, the connecting post 9 is in sliding fit with the first connecting cylinder 8, and one end of the first connecting cylinder 8 is hinged with the driving ring 11 through a hinge 10; when the temperature-sensing driving assembly pushes the driving ring 11 to move, the hinge 10 is driven to move when the driving ring 11 moves, and the connecting shaft 7 is driven to rotate by 90 degrees through the first connecting cylinder 8 and the connecting column 9 when the hinge 10 moves, so that the second ventilation groove 601 is communicated with the connecting box 18 and the ventilation box 4.
In this embodiment, preferably, the temperature-sensing driving assembly includes a second connecting cylinder 13, a thermal expansion strip 14 and two driving columns 12, one ends of the two driving columns 12 respectively penetrate through the two acoustic baffles 1 and are respectively fixedly connected with the two driving rings 11, the driving columns 12 are in sliding fit with the acoustic baffles 1, the other ends of the two driving columns 12 extend into the second connecting cylinder 13 from two ends of the second connecting cylinder 13, the driving columns 12 are in sliding fit with the second connecting cylinder 13, the thermal expansion strip 14 is arranged in the second connecting cylinder 13, and two ends of the thermal expansion strip 14 are respectively fixedly connected with the two driving columns 12; the thermal expansion strip 14 adopts the material of thermal expansion to make, when the temperature in the sound insulation cavity is higher, the heat dissipation efficiency of power transmission part has been influenced to the sound insulation device, the effect of high temperature makes thermal expansion strip 14 inflation this moment, promote two drive posts 12 each other to keep away from when thermal expansion strip 14 expands, thereby drive two drive rings 11 each other keep away from, drive hinge 10 when drive ring 11 removes, drive connecting axle 7 rotatory 90 through first connecting cylinder 8 and spliced pole 9 when hinge 10 removes, thereby make the rotatory 90 of sound insulation adjusting column 6, make second ventilation groove 601 and connecting box 18 and ventilation box 4 intercommunication.
Referring to fig. 3 and 8, in the embodiment of the present invention, a plurality of support rods 2 are fixedly installed on opposite side walls of two sound insulation plates 1, and the plurality of support rods 2 are uniformly arranged at edge positions of the sound insulation plates 1; the sound insulation cover 3 can adopt the sound insulation membrane winding to make, when the installation, the accessible a plurality of bracing pieces 2 support, form sound insulation cover 3 with sound insulation membrane winding again gradually on bracing piece 2, through the setting of bracing piece 2 for the winding of sound insulation membrane is more convenient, when the production, only needs to produce the acoustic celotex board 1 of multiple specification, need not to be equipped with the sound insulation cover 3 of multiple specification according to the user demand, has reduced manufacturing cost.
In this embodiment, preferably, the support rod 2 is provided with a plurality of first anti-slip protrusions 16, and the second connecting cylinder 13 is provided with a plurality of second anti-slip protrusions 17; when the sound insulation cover 3 is sleeved on the supporting rod 2, the inner wall of the sound insulation cover 3 is contacted with the first anti-slip protrusion 16 and the second anti-slip protrusion 17, so that an anti-slip effect can be achieved, the sound insulation cover 3 is prevented from sliding and shifting in the winding/using process, and the second anti-slip protrusion 17 is arranged, so that the contact area between the second connecting cylinder 13 and air is larger, the temperature conduction efficiency of the second connecting cylinder 13 is improved, and the high temperature in the sound insulation cavity can be quickly transferred to the thermal expansion strip 14, so that the thermal response speed is improved.
Referring to fig. 9 and 10, in another embodiment of the valve assembly, in an embodiment of the present invention, a filter screen 15 is fixedly installed on one side of the second ventilation slot 601, and the filter screen 15 is disposed on one side close to the hinge 10; through the setting of filter screen 15, when ventilating, can filter the air that gets into in the sound insulation cavity, prevent that the dust from getting into in the sound insulation cavity, avoid the dust to adhere to and influence its heat dissipation on power transmission part.
In this embodiment, preferably, a dust discharge port 801 is formed on one side of the support cylinder 5, a third ventilation groove 602 is formed on the sound insulation adjusting column 6, when the second ventilation groove 601 is not communicated with the ventilation box 4, the second ventilation groove 601 is communicated with the connection box 18 through the third ventilation groove 602, and the filter screen 15 is located in the dust discharge port 801 at this time; when the automobile runs slowly, the heating value of the power transmission part is lower, the valve assembly is in a closed state, the second ventilation groove 601 is not communicated with the ventilation box 4, the second ventilation groove 601 is communicated with the connection box 18 through the third ventilation groove 602, the filter screen 15 is located in the dust exhaust port 801, air flow entering through the connection box 18 enters the second ventilation groove 601 through the third ventilation groove 602, then is exhausted through the filter screen 15 and the dust exhaust port 801, dust attached to the filter screen 15 can be impacted under the action of the air flow, so that the filter screen 15 is automatically cleaned, the filter screen 15 is prevented from being blocked due to long-time use, the filter screen 15 can be automatically cleaned by the aid of the air flow when the heating value of the power transmission part is not large, manual cleaning is not needed, the filter screen 15 is not required to be cleaned by driving of a power element, the convenience of use is improved, and the dust can be collected by arranging a mechanism on one side of the support cylinder 5 or the dust can be directly exhausted out of the automobile, so that the dust is prevented from remaining in the automobile.
Working principle: when the automobile is installed, the power transmission part of the automobile is arranged in the sound insulation cavity, the connecting box 18 is connected with the air inlet system of the automobile, so that when the automobile runs, external air flow can enter the connecting box 18 through the air inlet system, noise generated by the power transmission part can be isolated through the arrangement of the sound insulation plate 1 and the sound insulation sleeve 3, so that the noise generated by the automobile is reduced; when the temperature in the sound insulation cavity is higher, the sound insulation device influences the heat dissipation efficiency of the power transmission part, at the moment, the heat expansion strip 14 expands due to the high temperature, the two driving columns 12 are pushed away from each other when the heat expansion strip 14 expands, so that the two driving rings 11 are driven away from each other, the hinge 10 is driven to move when the driving rings 11 move, the connecting shaft 7 is driven to rotate 90 degrees through the first connecting cylinder 8 and the connecting column 9 when the hinge 10 moves, the sound insulation adjusting column 6 is rotated 90 degrees, and the second ventilation groove 601 is communicated with the connecting box 18 and the ventilation box 4; when the automobile runs slowly, the heating value of the power transmission part is lower, the valve assembly is in a closed state, the second ventilation groove 601 is not communicated with the ventilation box 4, the second ventilation groove 601 is communicated with the connection box 18 through the third ventilation groove 602, the filter screen 15 is located in the dust exhaust port 801, air flow entering through the connection box 18 enters the second ventilation groove 601 through the third ventilation groove 602, then is discharged through the filter screen 15 and the dust exhaust port 801, dust attached to the filter screen 15 can be impacted under the action of the air flow, so that the filter screen 15 is automatically cleaned, the filter screen 15 is prevented from being blocked due to long-time use, and through the arrangement of the structure, the filter screen 15 can be automatically cleaned by the air flow when the heating value of the power transmission part is not large.
The foregoing description is only of the preferred embodiments of the invention, and all changes and modifications that come within the meaning and range of equivalency of the structures, features and principles of the invention are therefore intended to be embraced therein.
Claims (8)
1. Noise reduction device for improving NVH of automobile, comprising two sound insulation plates (1), characterized in that: be provided with between two acoustic celotex board (1) sound-proof housing (3), form the sound-proof cavity between two acoustic celotex board (1) and sound-proof housing (3), two a plurality of first ventilation grooves (101) have all been seted up at the limit portion of acoustic celotex board (1), one side intercommunication of first ventilation groove (101) is provided with ventilation box (4), one side fixed mounting of ventilation box (4) has support section of thick bamboo (5), one side fixed mounting of support section of thick bamboo (5) has connection box (18), be provided with valve subassembly in support section of thick bamboo (5), be provided with the drive assembly of sense of temperature in the sound-proof cavity, the drive assembly of sense of temperature is connected with the drive of valve subassembly transmission, and when the temperature rose in the thermal-proof cavity, sense of temperature drive assembly drive valve subassembly was opened, makes connection box (18) and ventilation box (4) intercommunication.
2. A noise reduction device for improving NVH of an automobile according to claim 1, characterized in that: the valve assembly comprises a sound insulation adjusting column (6), a connecting shaft (7) is fixedly arranged at the end part of the sound insulation adjusting column (6), the sound insulation adjusting column (6) is rotatably arranged inside the supporting cylinder (5) through the connecting shaft (7), a second ventilation groove (601) is formed in the sound insulation adjusting column (6), the second ventilation groove (601) penetrates through the sound insulation adjusting column (6), a transmission assembly is arranged on one side of the supporting cylinder (5), and the temperature sensing driving assembly is in transmission connection with the connecting shaft (7) through the transmission assembly.
3. A noise reduction device for improving NVH of an automobile according to claim 2, characterized in that: the transmission assembly comprises a driving ring (11), a first connecting cylinder (8) and a connecting column (9), wherein the driving ring (11) is arranged on one side of the sound insulation plate (1), the temperature sensing driving assembly is in transmission connection with the driving ring (11), one end of the connecting shaft (7) extends out of the supporting cylinder (5), one end of the connecting column (9) is fixedly connected with the connecting shaft (7), the other end of the connecting column (9) extends into the first connecting cylinder (8), the connecting column (9) is in sliding fit with the first connecting cylinder (8), and one end of the first connecting cylinder (8) is hinged with the driving ring (11) through a hinge (10).
4. A noise reduction device for improving NVH of an automobile according to claim 3, characterized in that: the thermal-sensitive driving assembly comprises a second connecting cylinder (13), a thermal expansion strip (14) and two driving columns (12), wherein one ends of the driving columns (12) penetrate through the two sound insulation plates (1) respectively, the ends of the driving columns are fixedly connected with the two driving rings (11) respectively, the driving columns (12) are in sliding fit with the sound insulation plates (1), the other ends of the driving columns (12) extend into the second connecting cylinder (13) from the two ends of the second connecting cylinder, the driving columns (12) are in sliding fit with the second connecting cylinder (13), the thermal expansion strip (14) is arranged in the second connecting cylinder (13), and the two ends of the thermal expansion strip (14) are fixedly connected with the two driving columns (12) respectively.
5. A noise reduction device for improving NVH of an automobile according to claim 4, characterized in that: two the opposite lateral walls of acoustic celotex board (1) are all fixed mounting has a plurality of bracing pieces (2), and a plurality of bracing pieces (2) evenly set up in the border position of acoustic celotex board (1).
6. A noise reduction device for improving NVH of an automobile according to claim 5, characterized in that: a plurality of first anti-slip protrusions (16) are arranged on the supporting rod (2), and a plurality of second anti-slip protrusions (17) are arranged on the second connecting cylinder (13).
7. A noise reduction device for improving NVH of an automobile according to claim 4, characterized in that: a filter screen (15) is fixedly arranged on one side of the second ventilation groove (601), and the filter screen (15) is arranged on one side close to the hinge (10).
8. A noise reduction device for improving NVH of an automobile according to claim 7, characterized in that: one side of the supporting cylinder (5) is provided with a dust discharging port (801), the sound insulation adjusting column (6) is provided with a third ventilation groove (602), when the second ventilation groove (601) is not communicated with the ventilation box (4), the second ventilation groove (601) is communicated with the connection box (18) through the third ventilation groove (602), and the filter screen (15) is located in the dust discharging port (801).
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| CN117022139B (en) | 2024-08-06 |
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