CN114025298B - Pressure adjusting device for sound insulation box - Google Patents
Pressure adjusting device for sound insulation box Download PDFInfo
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- CN114025298B CN114025298B CN202111489740.2A CN202111489740A CN114025298B CN 114025298 B CN114025298 B CN 114025298B CN 202111489740 A CN202111489740 A CN 202111489740A CN 114025298 B CN114025298 B CN 114025298B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R29/00—Monitoring arrangements; Testing arrangements
- H04R29/001—Monitoring arrangements; Testing arrangements for loudspeakers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/04—Measuring force or stress, in general by measuring elastic deformation of gauges, e.g. of springs
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/162—Selection of materials
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/1752—Masking
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
- H04R1/021—Casings; Cabinets ; Supports therefor; Mountings therein incorporating only one transducer
Abstract
The invention belongs to the technical field of acoustic test equipment, and discloses a pressure adjusting device for a sound insulation box, which specifically comprises a lifting driving device and a pressure adjusting module; the pressure adjusting module comprises a basic framework, a screw nut adjusting device, a linear guide device and a pressing device; the foundation framework is formed by vertically and fixedly connecting an upper mounting plate and a lower mounting plate through a plurality of support columns, and the upper mounting plate is in driving connection with the lifting driving device; the upper end of the screw-nut adjusting device is fixedly connected with the upper mounting plate in a height-adjustable manner, the lower end of the screw-nut adjusting device is fixedly connected with the upper end of the linear guide device, and the lower end of the linear guide device penetrates through the lower mounting plate in a sliding manner to be in driving connection with the pressing device. The pressure adjusting device has the advantages of high pressure adjusting precision, good sound insulation performance, compact structure, simple operation, wide application range and the like.
Description
Technical Field
The invention belongs to the technical field of acoustic test equipment, and particularly relates to a pressure adjusting device for a sound insulation box.
Background
The electronic product is taken as a necessity of the modern society, and brings great convenience to the life of people. With the improvement of economic level and quality of life, people have higher and higher requirements on the acoustic function of loudspeaker electronic products. After the loudspeaker electronic product is produced, an acoustic function test needs to be carried out in the sound insulation box. For guaranteeing the acoustics test effect, it is sealed to need carry out the acoustics test to products such as loudspeaker, and this process is higher to the sound insulation performance and the pressure adjustment precision requirement of soundproof box, and pressure has greatly probably crushed the product that awaits measuring, and pressure too little can lead to sealed not good to influence the sound quality of loudspeaker, can't satisfy the pressure adjustment demand of specific product.
Among the prior art, patent document CN2021202681101 discloses a single loudspeaker acoustic test box, including lower box and sound-proof housing, be provided with the test microphone in its lower box, be provided with the puigging on the lower box inner wall, the sound-proof housing passes through elevating gear and sets up under on the box, the up end of lower box is provided with the product and places the piece, the product is placed the piece and is located the sound-proof housing below, be equipped with the inside test port of box under the intercommunication on the product is placed the piece, the test port cooperates with the test microphone. The lifting device of the utility model is wholly positioned in the sound-proof shield, and has larger volume; the vertical distance of the L-shaped plate on the mounting vertical plate can be changed by matching the adjusting limit screw with the top mounting plate, so that the lower pressure degree of the product pressing mechanism is adjusted. The utility model discloses a product hold-down mechanism when adjusting pressure, need transfer the screw in the pine L template waist type hole earlier, the spacing screw of readjustment upper end, make the relative installation riser of L template upwards slide, thereby drive the pressure head and shift up, when adjusting the pressure position of needs, the screw in screwing up L template waist type hole again is fixed, the operation is inconvenient, and this product hold-down mechanism does not set up sharp guider, it leads to pressure not steady to press the easy emergence of in-process pressure spring to twist reverse the skew, the pressure regulation precision is poor.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides the pressure adjusting device for the sound insulation box, which has the advantages of high pressure adjusting precision, good sound insulation performance, compact structure, simplicity in operation and wide application range.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
a pressure adjusting device for a sound insulation box comprises a lifting driving device and a pressure adjusting module, wherein the pressure adjusting module comprises a basic framework, a screw rod nut adjusting device, a linear guide device and a pressing device; the foundation framework is formed by vertically and fixedly connecting an upper mounting plate and a lower mounting plate through a plurality of support columns, and the upper mounting plate is in driving connection with the lifting driving device; the upper end of the screw-nut adjusting device is fixedly connected with the upper mounting plate in a height-adjustable manner, the lower end of the screw-nut adjusting device is fixedly connected with the upper end of the linear guide device, and the lower end of the linear guide device penetrates through the lower mounting plate in a sliding manner to be in driving connection with the pressing device.
Further, the screw nut adjusting device comprises a screw nut transmission structure, a pressure sensor fixing block, a spring and a spring fixing block;
the screw rod nut transmission structure comprises a T-shaped screw rod, a locking nut and a T-shaped adjusting nut; the T-shaped head of the T-shaped screw rod is fixedly connected with the upper mounting plate, and the locking nut and the T-shaped adjusting nut are sequentially screwed on the screw rod below the T-shaped screw rod; the upper end of the pressure sensor is tightly attached to the T-shaped adjusting nut by means of the pre-pressure of the spring, and the lower end of the pressure sensor is tightly locked and fixed with the pressure sensor fixing block through a screw;
the lower end of the pressure sensor fixing block is provided with a first central convex shaft, the lower end of the spring fixing block and the first central convex shaft are coaxially provided with a second central convex shaft, and a sinking central hole is formed in the second central convex shaft; the upper end of the spring is sleeved on the first central convex shaft of the pressure sensor fixing block, and the lower end of the spring is placed in the sunken central hole of the second central convex shaft of the spring fixing block;
a guide post is also arranged between the spring fixing block and the pressure sensor fixing block; the pressure sensor fixing block is provided with a first guide hole, the lower end of the guide post is fixed on the spring fixing block, and the upper end of the guide post slidably extends out of the first guide hole.
Furthermore, the linear guide device comprises a plurality of guide shafts and linear bearings matched with the guide shafts; a second guide hole is formed in the lower mounting plate, and the linear bearing is fixed in the second guide hole; the upper end of the guide shaft is fixedly connected with the spring fixing block, and the lower end of the guide shaft penetrates through the linear bearing to be fixedly connected with a pressing device below the lower mounting plate.
Furthermore, the pressing device comprises a needle block base, needle blocks, probes and a silica gel pressure head, wherein the needle block base is fixedly connected with the lower end of the guide shaft, two needle blocks are respectively arranged on two sides of the needle block base, the probes are arranged below the needle blocks, one ends of the probes are connected with a power supply through electric wires, and the other ends of the probes are in point contact conduction connection with metal electrode points of a product to be detected; the lower part of the needle block base is fixedly connected with the silica gel pressure head, and the silica gel pressure head is used for pressing a product to be detected; and a limiting column is also arranged below the lower mounting plate.
Furthermore, a floating structure is arranged on the upper mounting plate of the pressure adjusting module; the floating structure comprises an equal-height screw and a compression spring, the compression spring is sleeved on the equal-height screw, mounting holes for mounting the equal-height screw and the compression spring are formed in the upper mounting plate, and the upper mounting plate is connected with the driving end of the lifting driving device in a floating mode through the floating structure.
Furthermore, the lifting driving device is a downward-pressing cylinder module, and the downward-pressing cylinder module comprises a cantilever structure and a cylinder;
the cantilever structure is formed by fixedly connecting a bottom plate, an L-shaped slide rail mounting block and an air cylinder fixing plate from bottom to top in sequence, reinforcing ribs are arranged at the fixed connection positions of the upper end and the lower end of the cantilever structure, and a first waist-shaped hole with the adjustable mounting position of the bottom plate is arranged on a horizontal fixing plate of the L-shaped slide rail mounting block along a first horizontal direction;
the slide rail mounting block is provided with a linear slide rail and a slide block sliding on the slide rail; the air cylinder is fixedly arranged on the air cylinder fixing plate, one end of a piston rod of the air cylinder is in driving connection with the sliding block, and the sliding block is in driving connection with an upper mounting plate of the pressure adjusting module;
an upper buffer is arranged on the cylinder fixing plate corresponding to the upper part of the sliding block, a lower buffer is arranged on the side end face of the sliding block, and a limiting block is arranged on the sliding rail mounting block corresponding to the lower part of the lower buffer.
Further, in some embodiments, the pressure regulating device further comprises an outer acoustic enclosure module, a carrier plate module, and a baffle module;
the baffle plate module comprises a baffle plate, and the carrier plate module is fixedly arranged on the baffle plate and used for positioning and placing a product to be detected; the outer sound-proof housing module is of a rectangular cavity structure with an opening at the lower part, covers the pressure adjusting module and is in driving connection with the cylinder, and can be matched with the baffle plate to form a first sound-proof box after being driven by the cylinder to be pressed down, so that the pressure adjusting module and the support plate module are both positioned in the first sound-proof box; the lower air cylinder module is fixedly arranged on the baffle plate through a bottom plate, and a second waist-shaped hole with an adjustable installation position with the baffle plate is arranged on the bottom plate along a second horizontal direction; a second sound insulation box with different performances can be arranged below the baffle;
the cooperation department of the top of baffle and outer sound-proof housing module is provided with the third and seals up, the below of baffle is provided with the sealed pad of fourth and gives sound insulation foam with second sound-proof box cooperation department.
Furthermore, the lower end of a sliding block of the lower air cylinder module is fixedly connected with a driving connecting block, the lower end of the driving connecting block is fixedly connected with an outer cover mounting block, the upper end of the outer cover mounting block is used for fixedly mounting an outer sound-proof cover module, and the lower end of the outer cover mounting block is fixedly connected with an upper mounting plate of a pressure adjusting module; and a first sealing gasket is arranged between the driving connecting block and the outer cover mounting block and used for sealing the mounting contact surface of the outer cover mounting block and the outer sound-proof cover module.
Furthermore, the rectangular cavity of the outer sound-proof shield module is formed by splicing a rectangular frame and six aluminum plates, wherein one aluminum plate is arranged around the rectangular frame, the two aluminum plates are spliced left and right above the rectangular frame, and one of the aluminum plates above the rectangular frame is provided with a wire outlet; every aluminum plate's installation face all installs sealing silica gel additional, the cavity inside packing of outer sound-proof housing module has the bubble cotton.
Furthermore, the carrier plate module comprises a carrier plate and a carrier plate fixing plate for fixing the carrier plate, wherein the carrier plate is provided with an imitated groove for positioning and placing a product to be tested; a product sealing gasket is assembled between the carrier plate and the carrier plate fixing plate, the carrier plate fixing plate is fixedly arranged on the baffle plate, and a second sealing gasket is arranged between the carrier plate fixing plate and the baffle plate; a nylon net is arranged below the carrier plate fixing plate; guide sleeves are fixed on a support plate fixing plate of the support plate module in a diagonal manner, and positioning pins matched with the guide sleeves are arranged below a lower mounting plate of the pressure adjusting module.
Compared with the prior art, the invention has the following beneficial effects:
(1) The pressure adjusting device provides driving force for pressing the whole pressed product through the pressing cylinder module, fine adjustment of pressure is carried out on the product to be detected through the screw rod nut adjusting device, the pressure can be detected and displayed in real time through the additionally arranged pressure sensor, the pressure adjusting precision is high, the adjusting range is wide, and the operation is simple;
(2) Compared with patent document CN2021202681101, the pressure adjusting module of the application adjusts displacement downwards, and the downward compression deformation of the spring can be changed only by rotating the T-shaped adjusting nut during operation, so that the operation is simpler and more convenient; meanwhile, the floating structure is arranged at the upper end of the pressure adjusting module, so that the positioning pin at the lower end of the pressure adjusting module can be more smoothly matched with the guide sleeve when the pressure adjusting module is integrally pressed down, the dependence on the processing level is reduced, the uncertainty caused by the accumulation of processing errors can be avoided, and the reliability of product positioning operation is improved; the lower end of the lower pressure cylinder module is provided with a linear guide device, so that when the lower pressure cylinder module and the screw nut adjusting device drive and adjust pressure up and down, the spring is prevented from generating torsional deflection, and the stability and the smoothness of driving and adjusting are ensured; a guide post is arranged between the spring fixing block and the pressure sensor fixing block, so that the pressure sensor can be prevented from rotating when pressure is adjusted, and a linear guide effect is realized on the downward pressing of the spring; the whole structure is compact, the installation is convenient, the operation is simple, and the pressure adjusting precision is high;
(3) The outer sound-proof housing module of the pressure regulating device is of a rectangular cavity structure formed by splicing aluminum plates, and the upper part of the outer sound-proof housing module is formed by splicing two aluminum plates left and right, so that the outer sound-proof housing module is convenient to disassemble, use and maintain; and different from the lifting device of CN2021202681101 which is wholly positioned in the sound-proof housing, the outer sound-proof housing module is fixedly connected with the driving end of the down-pressing cylinder module, and can be matched with the baffle plate to form a first sound-proof box after being driven to be pressed down by the cylinder, so that the pressure adjusting module and the support plate module are both positioned in the first sound-proof box, the volume of the device is reduced, and the occupied space is small; in addition, the upper end face and the lower end face of the outer sound-proof cover are provided with the sealing gaskets, the mounting surface inside the aluminum plate is additionally provided with the sealing silica gel, and the cavity is filled with foam for absorbing external noise, so that the sound-proof performance is good, and the sound-proof test effect of a product to be tested is ensured;
(4) The invention adopts the modular structure design, can adapt to test products with different shapes, has wide application range and is more convenient and faster to use.
Drawings
FIG. 1 is a schematic view of the overall structure of a pressure regulating apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a down cylinder module of the pressure adjustment apparatus according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of an outer sound-proof housing module of a pressure regulating device according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a pressure regulating module of the pressure regulating apparatus according to the embodiment of the present invention;
fig. 5 is a schematic structural diagram of a carrier board module of the pressure adjustment device according to an embodiment of the invention;
FIG. 6 is a schematic structural diagram of a mask module of a pressure adjustment apparatus according to an embodiment of the present invention;
FIG. 7 is a schematic view of a pressure regulating device according to an embodiment of the present invention applied to a second soundproof case;
the symbols in the figure illustrate: 1-pressing a cylinder module; 2-an outer sound-proof housing module; 3-a pressure regulating module; 4-a carrier module; 5-a baffle module; 6-cylinder; 7-cylinder fixing plate; 8-linear guide rail; 9-a slide block; 10-driving a connecting block; 11-a first gasket; 12-a housing mounting block; 13-an upstream buffer; 14-a slide rail mounting block; 15-a downlink buffer; 16-a limiting block; 17-reinforcing ribs; 18-a base plate; 19-outlet holes; 20-sealing silica gel; 21-foam cotton; 22-aluminum plate; 23-an equal-height screw; 24-a compression spring; 25-an upper mounting plate; 26-a support column; 27-a guide post; 28-spring fixing block; 29-a guide shaft; 30-linear bearings; 31-a limiting column; 32-a needle block base; 33-a probe; 34-silica gel indenter; 35-T type screw rod; 36-a locking nut; a 37-T type adjusting nut; 38-a pressure sensor; 39-pressure sensor fixing block; 40-a spring; 41-linear bearing fixing block; 42-a positioning pin; 43-needle block; 44-a carrier plate; 45-product to be tested; 46-carrier plate fixing plate; 47-product seal; 48-a second gasket; 49-guide sleeve; 50-nylon mesh; 51-a mask; 52-a third gasket; 53-a fourth gasket; 54-sound insulation foam cotton.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "both ends", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "disposed," "connected," "fixed," "screwed" and the like are to be understood broadly, for example, as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate agent, and may be used for communicating the inside of two elements or interacting relation of two elements, unless otherwise specifically defined, and the specific meaning of the terms in the present invention can be understood by those skilled in the art according to specific situations.
The invention provides a pressure adjusting device for a sound-proof box, which comprises a lower air cylinder module 1, an outer sound-proof cover module 2, a pressure adjusting module 3, a carrier plate module 4 and a baffle module 5 as shown in figure 1. Wherein, the lower air cylinder module 1 provides power for the pressed product; the carrier plate module 4 is fixedly arranged on a baffle 51 of the baffle module 5 and used for positioning and placing a product to be tested; the outer sound-proof housing module 2 is a rectangular cavity structure with an opening at the lower part, is covered above the pressure adjusting module 3 and is in driving connection with the cylinder 6, and the outer sound-proof housing module 2 is driven by the cylinder 6 to be pressed down and then can be matched with the baffle plate 51 to form a first sound-proof box, so that the pressure adjusting module 3 and the support plate module 4 are both positioned in the first sound-proof box, a low-noise environment is provided for acoustic testing, and noise interference of an external environment is shielded; the upper part of the baffle module 5 is used for installing the lower air cylinder module 1 and the carrier plate module 4; in some embodiments, a second sound isolation box of different properties may be installed under the baffle 51 of the baffle module 5, as shown in FIG. 6.
The pressing cylinder module 1 comprises a cantilever structure and a cylinder 6, the cantilever structure is formed by sequentially and fixedly connecting a bottom plate 18, an L-shaped slide rail mounting block 14 and a cylinder fixing plate 7 from bottom to top, and reinforcing ribs 17 are arranged at the fixed connection positions of the upper end and the lower end and used for reinforcing the cantilever structure; a first waist-shaped hole with an adjustable installation position with the base plate 18 is arranged on a horizontal fixing plate of the L-shaped slide rail installation block 14 along a first horizontal direction, meanwhile, the lower air cylinder module 1 is fixedly installed on the baffle plate 51 through the base plate 18, a second waist-shaped hole with an adjustable installation position with the baffle plate 51 is arranged on the base plate 18 along a second horizontal direction, the installation position of the cantilever structure can be adjusted in a horizontal plane direction through the first waist-shaped hole and the second waist-shaped hole, and the first horizontal direction and the second horizontal direction can be arranged in azimuth according to actual conditions;
the slide rail mounting block 14 is provided with a linear slide rail 8 and a slide block 9 sliding on the slide rail; the cylinder 6 is arranged on a cylinder fixing plate 7, one end of a cylinder piston rod is connected with a sliding block 9, and the sliding block 9 is driven to move up and down along a linear guide rail 8; an upper buffer 13 is arranged on the cylinder fixing plate 7 corresponding to the upper part of the sliding block 9, a lower buffer 15 is arranged on the side end surface of the sliding block 9, and a limiting block 16 is arranged on the slide rail mounting block 14 corresponding to the lower part of the lower buffer 15, so that the structure can limit and buffer the stroke of the cylinder 6, and the driving stroke is smoother and more accurate;
the lower end of the sliding block 9 is fixedly connected with a driving connecting block 10, the lower end of the driving connecting block 10 is fixedly connected with an outer cover mounting block 12, the upper end of the outer cover mounting block 12 is used for fixedly mounting an outer sound-proof cover module 2, and the lower end of the outer cover mounting block is fixedly connected with an upper mounting plate 25 of a pressure adjusting module 3, so that the driving force of the cylinder is transmitted to the outer sound-proof cover module 2 and the pressure adjusting module 3 at the same time; a first sealing gasket 11 is arranged between the driving connecting block 10 and the outer cover mounting block 12 and used for sealing the mounting contact surface of the outer cover mounting block 12 and the outer sound-proof cover module 2.
As shown in fig. 3, the rectangular cavity of the outer soundproof cover module 2 is formed by splicing a rectangular frame and six aluminum plates 22, wherein the rectangular frame is provided with one aluminum plate 22 at the left, right, front and back sides, the rectangular frame is formed by splicing two aluminum plates 22 at the left and right sides, the disassembly and the maintenance are convenient, and one of the aluminum plates 22 above is provided with a wire outlet hole 19 for a connecting wire to pass through; every aluminum plate 22's installation face all installs sealing silica gel 20 additional and prevents to leak the sound, outside sound-proof housing module 2's the inside bubble that is used for absorbing external noise of cavity is cotton.
As shown in fig. 4, the pressure adjusting module 3 includes a base structure, a floating structure, a lead screw nut adjusting device, a linear guide device and a pressing device; the foundation framework is formed by connecting an upper mounting plate 25 and a lower mounting plate 41 up and down through four support columns 26; the floating structure is arranged on the upper mounting plate 25 and consists of four groups of equal-height screws 23 and compression springs 24, the compression springs 24 are sleeved on the equal-height screws 23, corresponding mounting holes are formed in the upper mounting plate 25, the upper mounting plate 25 is in floating connection with the driving end of the lifting driving device through the floating structure, certain floating displacement can be achieved at the upper, lower, left and right positions, and the positioning pins 42 can be more smoothly matched with the guide sleeves 49 on the carrier plate module 4 for positioning;
the screw nut adjusting device comprises a screw nut transmission structure, a pressure sensor 38, a pressure sensor fixing block 30, a spring 40 and a spring fixing block 28; the feed screw nut transmission structure comprises a T-shaped feed screw 35, a locking nut 36 and a T-shaped adjusting nut 37; the T-shaped head of the T-shaped screw rod 35 is fixedly connected with the upper mounting plate 25 through threads, and the locking nut 36 and the T-shaped adjusting nut 37 are screwed on the screw rod below the T-shaped screw rod 35 in sequence; the upper end of the pressure sensor 38 is tightly attached to the T-shaped adjusting nut 37 by virtue of the pre-pressure of the spring 40, and the lower end of the pressure sensor is tightly locked and fixed with the pressure sensor fixing block 39 through a screw;
the spring 40 is placed between the pressure sensor fixing block 39 and the spring fixing block 28, specifically, a first central convex shaft is arranged at the lower end of the pressure sensor fixing block 39, a second central convex shaft is coaxially arranged between the lower end of the spring fixing block 28 and the first central convex shaft, and a sinking central hole is formed in the second central convex shaft; the upper end of the spring 40 is sleeved on the first central convex shaft of the pressure sensor fixing block 39, and the lower end of the spring is placed in the sunken central hole of the second central convex shaft of the spring fixing block 28;
as a preferential scheme, two guide posts 27 are further arranged between the spring fixing block 28 and the pressure sensor fixing block 39, a first guide hole is formed in the pressure sensor fixing block 39, the lower end of each guide post 27 is fixed on the spring fixing block 28, and the upper end of each guide post 27 slidably extends out of the first guide hole; the guide post 27 has two functions: (1) preventing pressure adjustment, pressure sensor 38 from rotating; (2) the spring plays a role in guiding when compressed;
the linear guide device comprises four guide shafts 29 and linear bearings 30 matched with the guide shafts 29; a second guide hole is formed in the lower mounting plate 41, and the linear bearing 30 is fixed in the second guide hole; the upper end of the guide shaft 29 is fixedly connected with the spring fixing block 28, and the lower end of the guide shaft passes through the linear bearing 30 and is fixedly connected with a pressing device below the lower mounting plate 41; the linear guide device can smoothly move up and down along the linear bearing 30 to ensure the stability and smoothness during pressure adjustment.
The pressing device comprises a needle block base 32, a needle block 43, a probe 33 and a silica gel pressure head 34; the needle block base 32 is fixedly connected with the lower end of the guide shaft 29, two needle blocks 43 are respectively arranged on two sides of the needle block base 32, a probe 33 is arranged below the needle blocks 43, one end of the probe 33 is connected with a power supply through a wire, and the other end of the probe 33 is in point contact conduction connection with a metal electrode point of a product to be detected; the lower part of the needle block base 32 is fixedly connected with the silica gel pressure head 34, and the silica gel pressure head 34 is used for pressing a product to be detected; the deformation quantity of the spring 40 can be changed by rotating the T-shaped adjusting nut 37, so that the pressure of the silica gel pressure head 34 on a product to be detected can be changed, and the operation is simple and convenient; the below of lower mounting panel 41 still is provided with spacing post 31, spacing post 31 can the compression stroke of accurate control probe 33, utilizes spacing support effect of spacing post 31 simultaneously, and the pressure adjustment module of being convenient for carries out the accuracy control.
As shown in fig. 5, the carrier board module 4 includes a carrier board 44 and a carrier board fixing board 46, a product to be tested is fixed in a profiling groove of the carrier board 44, and a product gasket 47 is assembled between the carrier board 44 and the carrier board fixing board 46 to prevent sound leakage; the carrier plate fixing plate 46 is fixedly installed on the baffle plate 51, a second gasket 48 is arranged between the carrier plate fixing plate 46 and the baffle plate 51, and the second gasket 48 has the following functions: preventing sound leakage between the carrier plate module 4 and the baffle plate module 5; a nylon net is arranged below the carrier plate fixing plate 46 to prevent a product to be detected from falling into the sound insulation box; the carrier plate fixing plate 46 is fixed with guide sleeves 49 in a diagonal form, and the guide sleeves 49 are matched with the positioning pins 42 arranged below the lower mounting plate 41 of the pressure adjusting module 3 to play a role in positioning.
As shown in fig. 6, the baffle module 5 is used for installing the down-pressure cylinder module 1 and the carrier module 4, a third gasket 52 for sealing is arranged above the baffle 51 and at the position where the outer soundproof box module 2 is matched, and a fourth gasket 53 for sealing and soundproof foam 54 for absorbing noise are arranged below the baffle 51 and at the position where the second soundproof box is matched.
The pressure regulating process of the pressure regulating device of the invention is as follows: firstly, the pressure of a spring 40 needs to be calibrated, an aluminum plate in front of an outer sound-proof shield is removed, partial foam is taken out, a product to be tested is placed on a support plate 44 in a manual mode, and the product to be tested is accurately positioned by a profiling groove; pressing a start button, rotating the T-shaped adjusting nut 37 to adjust the pressure after the cylinder 6 is stably pressed down, rotating the locking nut 36 to lock and fix when the required pressure is adjusted, then installing foam and a front aluminum plate, and completing pressure calibration.
The above description is only an example of the present application and is not intended to limit the present invention. Any modification, equivalent replacement, and improvement made within the scope of the application of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A pressure regulating device for sound-proof box, includes lift drive and pressure regulation module (3), its characterized in that: the pressure adjusting module (3) comprises a basic framework, a screw nut adjusting device, a linear guide device and a pressing device; the foundation framework is formed by vertically and fixedly connecting an upper mounting plate (25) and a lower mounting plate (41) through a plurality of supporting columns (26), and the upper mounting plate (25) is in driving connection with a lifting driving device; the upper end of the screw nut adjusting device is fixedly connected with an upper mounting plate (25) in a height-adjustable manner, the lower end of the screw nut adjusting device is fixedly connected with the upper end of a linear guide device, and the lower end of the linear guide device penetrates through a lower mounting plate (41) in a sliding manner to be in driving connection with a pressing device;
the screw nut adjusting device comprises a screw nut transmission structure, a pressure sensor (38), a pressure sensor fixing block (30), a spring (40) and a spring fixing block (28); the screw rod nut transmission structure comprises a T-shaped screw rod (35), a locking nut (36) and a T-shaped adjusting nut (37); the T-shaped head of the T-shaped screw rod (35) is fixedly connected with the upper mounting plate (25), and the locking nut (36) and the T-shaped adjusting nut (37) are sequentially screwed on the screw rod below the T-shaped screw rod (35); the upper end of the pressure sensor (38) is tightly attached to the bottom of the T-shaped adjusting nut (37) through the pre-pressure of the spring (40), the spring (40) is arranged below the pressure sensor (38), the lower end of the spring (40) is fixedly arranged on the spring fixing block (28), and the lower end of the spring fixing block (28) is fixedly connected with the upper end of the linear guide device.
2. A pressure regulating device for acoustic isolation boxes according to claim 1, characterized in that said lead screw nut regulating device further comprises a pressure sensor fixing block (30); the upper end of the pressure sensor (38) is tightly attached to the T-shaped adjusting nut (37), and the lower end of the pressure sensor is tightly locked and fixed with the pressure sensor fixing block (39) through a screw;
a first central convex shaft is arranged at the lower end of the pressure sensor fixing block (39), a second central convex shaft is arranged at the lower end of the spring fixing block (28) and is coaxial with the first central convex shaft, and a sinking central hole is formed in the second central convex shaft; the upper end of the spring (40) is sleeved on a first central convex shaft of the pressure sensor fixing block (39), and the lower end of the spring (40) is placed in a sunken central hole of a second central convex shaft of the spring fixing block (28);
a guide post (27) is also arranged between the spring fixing block (28) and the pressure sensor fixing block (39); the pressure sensor fixing block (39) is provided with a first guide hole, the lower end of the guide column (27) is fixed on the spring fixing block (28), and the upper end of the guide column slidably extends out of the first guide hole.
3. A pressure regulating device for a soundproof case according to claim 2, wherein: the linear guide device comprises a plurality of guide shafts (29) and linear bearings (30) matched with the guide shafts (29); a second guide hole is formed in the lower mounting plate (41), and the linear bearing (30) is fixed in the second guide hole; the upper end of the guide shaft (29) is fixedly connected with the spring fixing block (28), and the lower end of the guide shaft penetrates through the linear bearing (30) to be fixedly connected with a pressing device below the lower mounting plate (41).
4. A pressure regulating device for a soundproof case according to claim 3, wherein: the pressing device comprises a needle block base (32), a needle block (43), probes (33) and a silica gel pressure head (34), the needle block base (32) is fixedly connected with the lower end of the guide shaft (29), the two sides of the needle block base (32) are respectively provided with the needle block (43), the probes (33) are arranged below the needle blocks (43), one end of each probe (33) is connected with a power supply through an electric wire, and the other end of each probe is in point contact conduction connection with a metal electrode point of a product to be tested; the lower part of the needle block base (32) is fixedly connected with the silica gel pressure head (34), and the silica gel pressure head (34) is used for pressing a product to be tested; and a limiting column (31) is also arranged below the lower mounting plate (41).
5. A pressure regulating device for a soundproof case according to claim 2, wherein: a floating structure is further arranged on the upper mounting plate (25) of the pressure adjusting module (3); the floating structure comprises equal-height screws (23) and compression springs (24), the compression springs (24) are sleeved on the equal-height screws (23), mounting holes for mounting the equal-height screws (23) and the compression springs (24) are formed in the upper mounting plate (25), and the upper mounting plate (25) is connected with the driving end of the lifting driving device in a floating mode through the floating structure.
6. A pressure regulating device for a soundproof case according to any one of claims 1 to 5, wherein: the lifting driving device is a down-pressing cylinder module (1), and the down-pressing cylinder module (1) comprises a cantilever structure and a cylinder (6);
the cantilever structure is formed by fixedly connecting a bottom plate (18), an L-shaped slide rail mounting block (14) and an air cylinder fixing plate (7) from bottom to top in sequence, reinforcing ribs (17) are arranged at the fixed connection positions of the upper end and the lower end, and a first waist-shaped hole with the adjustable mounting position of the bottom plate (18) is formed in the horizontal fixing plate of the L-shaped slide rail mounting block (14) along a first horizontal direction;
the slide rail mounting block (14) is provided with a linear slide rail (8) and a slide block (9) sliding on the slide rail; the air cylinder (6) is fixedly arranged on the air cylinder fixing plate (7), one end of a piston rod of the air cylinder (6) is in driving connection with the sliding block (9), and the sliding block (9) is in driving connection with an upper mounting plate (25) of the pressure adjusting module (3);
an upper buffer (13) is arranged on the cylinder fixing plate (7) above the sliding block (9), a lower buffer (15) is arranged on the side end face of the sliding block (9), and a limiting block (16) is arranged on the slide rail mounting block (14) below the lower buffer (15).
7. A pressure regulating device for soundproof case according to claim 6, characterized in that: the device also comprises an outer sound-proof shield module (2), a carrier plate module (4) and a baffle module (5);
the baffle module (5) comprises a baffle (51), and the carrier plate module (4) is fixedly arranged on the baffle (51) and used for positioning and placing a product to be tested; the outer soundproof cover module (2) is of a rectangular cavity structure with an opening at the lower part, covers the upper part of the pressure adjusting module (3) and is in driving connection with the cylinder (6), and the outer soundproof cover module (2) is driven by the cylinder (6) to be pressed down and then can be matched with the baffle plate (51) to form a first soundproof box, so that the pressure adjusting module (3) and the support plate module (4) are both positioned in the first soundproof box; the downward-pressing cylinder module (1) is fixedly arranged on the baffle plate (51) through the bottom plate (18), and a second waist-shaped hole with an adjustable installation position with the baffle plate (51) is formed in the bottom plate (18) along a second horizontal direction; a second sound insulation box with different performances can be arranged below the baffle plate (51);
the cooperation department of the top of baffle (51) and outer sound-proof housing module (2) is provided with third sealed pad (52), the below of baffle (51) is provided with fourth sealed pad (53) and sound insulation foam (54) with second sound-proof box cooperation department.
8. A pressure regulating device for a soundproof case according to claim 7, wherein: the lower end of a sliding block (9) of the lower air cylinder module (1) is fixedly connected with a driving connecting block (10), and the lower end of the driving connecting block (10) is fixedly connected with an outer cover mounting block (12); the upper end of the outer cover mounting block (12) is used for fixedly mounting the outer sound-proof cover module (2), and the lower end of the outer cover mounting block is fixedly connected with an upper mounting plate (25) of the pressure adjusting module (3); a first sealing gasket (11) is arranged between the driving connecting block (10) and the outer cover mounting block (12) and used for sealing the mounting contact surface of the outer cover mounting block (12) and the outer sound-proof cover module (2).
9. A pressure regulating device for a soundproof case according to claim 7, wherein: the rectangular cavity of the outer sound-proof shield module (2) is formed by splicing a rectangular frame and six aluminum plates (22), wherein one aluminum plate (22) is arranged on the periphery of the rectangular frame, the two aluminum plates (22) are spliced left and right above the rectangular frame, and a wire outlet hole (19) is formed in one of the aluminum plates (22) above; every aluminum plate's (22) installation face all installs sealing silica gel (20) additional, the inside bubble cotton that is filled of cavity of outer sound-proof housing module (2).
10. A pressure regulating device for a soundproof case according to claim 7, wherein: the carrier plate module (4) comprises a carrier plate (44) and a carrier plate fixing plate (46) for fixing the carrier plate (44), wherein the carrier plate (44) is provided with a profile groove for positioning and placing a product to be tested; a product gasket (47) is assembled between the carrier plate (44) and the carrier plate fixing plate (46), the carrier plate fixing plate (46) is fixedly arranged on the baffle plate (51), and a second gasket (48) is arranged between the carrier plate fixing plate (46) and the baffle plate (51); a nylon net is arranged below the carrier plate fixing plate (46); guide sleeves (49) are fixed on a carrier plate fixing plate (46) of the carrier plate module (4) in a diagonal manner, and positioning pins (42) matched with the guide sleeves (49) are arranged below a lower mounting plate (41) of the pressure adjusting module (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111489740.2A CN114025298B (en) | 2021-12-08 | 2021-12-08 | Pressure adjusting device for sound insulation box |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111489740.2A CN114025298B (en) | 2021-12-08 | 2021-12-08 | Pressure adjusting device for sound insulation box |
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| CN114025298A CN114025298A (en) | 2022-02-08 |
| CN114025298B true CN114025298B (en) | 2023-04-07 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN204649781U (en) * | 2015-05-11 | 2015-09-16 | 苏州博众精工科技有限公司 | A kind of liftable transport establishment |
| WO2017156778A1 (en) * | 2016-03-18 | 2017-09-21 | 深圳市艾励美特科技有限公司 | Test fixture for electronic product |
| CN209992651U (en) * | 2019-04-28 | 2020-01-24 | 珠海市运泰利自动化设备有限公司 | Vertical audio female head automatic plugging and unplugging testing mechanism |
| CN213658609U (en) * | 2020-09-29 | 2021-07-09 | 珠海博杰电子股份有限公司 | Automatic detection equipment |
| CN112839292A (en) * | 2021-02-01 | 2021-05-25 | 珠海博杰电子股份有限公司 | Acoustic testing box for single loudspeaker |
| CN113301491B (en) * | 2021-05-27 | 2022-11-15 | 珠海精实测控技术股份有限公司 | Positioning detection device and test platform for microphone |
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Address after: 519125 area a, 29 Xinke 1st Road, Baijiao Science and Technology Industrial Park, Doumen District, Zhuhai City, Guangdong Province Applicant after: Zhuhai Jingshi Measurement and Control Technology Co.,Ltd. Address before: 519125 area a, 29 Xinke 1st Road, Baijiao Science and Technology Industrial Park, Doumen District, Zhuhai City, Guangdong Province Applicant before: P&R. MEASUREMENT Inc. |
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