Super performance single door soundproof box

Abstract

The present invention aims to provide a super-performance single-door soundproof box that can provide high isolation performance in low-frequency testing, effectively isolate external vibration interference, and is easy to open and close. The present invention includes an outer box and an inner box, the outer box includes a first shielding box and a shielding door hinged on the first shielding box, the inner box includes a second shielding box, a spherical shielding box, a polyhedron shielding box and an installation panel, the second shielding box is loaded and fixed in the first shielding box, the spherical shielding box is suspended in the second shielding box through a hanging floating component, the installation panel is fixed in the spherical shielding box, the installation panel is fixedly arranged on the spherical shielding box and connected to the second shielding box, the polyhedron shielding box is fixed on the installation panel, the installation panel is provided with a through port that matches the chamber opening of the polyhedron shielding box, and the shielding door is provided with a floating sealing door structure that matches the installation panel. The present invention is applied to the technical field of acoustic test soundproof boxes.

Description

Technical Field

[0001] The present invention is applied to the technical field of acoustic testing, and particularly relates to a super-performance single-door soundproof box used for noise testing of acoustic and electrical products. Background Art

[0002] At present, the low-frequency sound insulation performance of the soundproof boxes used for acoustic testing in China is not high. With the precision design of acoustic and electrical products, the low-frequency performance requirements of the soundproof boxes are getting higher and higher to meet the testing needs of the production line. Since the sound penetration at the low frequency of 100Hz can no longer be solved by simply increasing the wall thickness, the conventional soundproof boxes are very bulky and take up space, and they cannot meet the test requirements. In terms of sound insulation and noise reduction, they can only achieve an effect of 15db-40db.

[0003] For example, the Chinese patent with publication number CN104349263A discloses a soundproof box and a test device using the soundproof box. It uses a double-layer box connected by a shock-absorbing pad and evacuates the inner and outer boxes to improve the passive noise reduction effect and avoid damage to the acoustic product by evacuation. At the same time, a shock-absorbing chain is used to isolate the soundproof box from vibration interference. However, the overall equipment of this solution is large, occupies a large space, and the soundproof box needs to be hoisted and adjusted. At the same time, the soundproof box needs to be evacuated and broken when it is opened and closed, and the operation is cumbersome and complicated. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide an ultra-high performance single-door soundproof box which can provide high isolation performance in low-frequency testing, effectively isolate external vibration interference and is easy to use.

[0005] The technical solution adopted by the present invention is: the present invention includes an outer box and an inner box, the outer box includes a first shielding box and a shielding door hinged on the first shielding box, the inner box includes a second shielding box, a spherical shielding box, a polyhedron shielding box and an installation panel, the second shielding box is loaded and fixed in the first shielding box, the spherical shielding box is suspended in the second shielding box through a hanging floating component, the installation panel is fixed in the spherical shielding box, the installation panel is fixedly arranged on the spherical shielding box and connected to the second shielding box, the polyhedron shielding box is fixed on the installation panel, the installation panel is provided with a through opening adapted to the chamber opening of the polyhedron shielding box, and the shielding door is provided with a floating sealing door structure adapted to the installation panel.

[0006] It can be seen from the above scheme that by adopting a double-layer box and combining the design of a spherical shielding box, the isolation performance can be improved by using curved sound reflection. Among them, the spherical shielding box is used as the shielding structure of the inner box, and the isolation can be improved by 10db compared with the traditional square box. The polyhedron shielding box is set in the spherical shielding box to improve the isolation. The spherical shielding box is suspended in the second shielding box through a suspension floating component, thereby absorbing the noise interference generated by vibration, and at the same time reducing the transmission of noise through the air medium between each shielding box. The way in which the mounting panel is connected to the second shielding box plays a role in stabilizing the spherical shielding box with a design with the least rigid connection. The polyhedron shielding box is used to load the product to be tested, and the mounting panel and the floating sealing door structure cooperate with the polyhedron shielding box to achieve the sealing of the test chamber. In addition, the floating shock-absorbing structure set at the bottom of the outer box further isolates the vibration interference, and the inner wall of the outer box is provided with a shielding structure, and the overall shielding box structure can achieve an isolation effect of 80db. At the same time, the design of the shielding door and floating sealing door structure can meet the simultaneous opening and closing of the two sets of boxes. The floating sealing door structure is used in conjunction with the suspended spherical shielding box to achieve sealed isolation and ensure the isolation effect.

[0007] A preferred solution is that the suspension floating assembly includes several groups of suspension ropes and several groups of floating frames, the spherical shielding box is floatingly connected in the second shielding box through the floating frames, and the outer wall of the spherical shielding box is suspended by several groups of the suspension ropes and placed in the middle of the second shielding box.

[0008] It can be seen from the above scheme that a plurality of the floating frames provide flexible support force for the spherical shielding box when needed, so as to support the spherical shielding box while absorbing vibration interference. A plurality of groups of the suspension ropes are connected to the spherical shielding box, so as to hang the spherical shielding box in the middle of the second shielding box, so that the spherical shielding box is in a suspended state, thereby preventing and reducing low-frequency interference caused by vibration.

[0009] A further preferred solution is that the floating frame includes a connecting frame and a supporting frame, the supporting frame is fixed on the second shielding box, a plurality of elastic parts are arranged on the supporting frame, the connecting frame is connected to the spherical shielding box, and a pressing sheet matching with the plurality of elastic parts is arranged on the connecting frame.

[0010] As can be seen from the above scheme, the design of the connection frame and the support frame being separated avoids the rigid connection between the spherical shielding box and the second shielding box. The pressing sheet cooperates with the elastic member, and the elastic member serves as a buffer for the spherical shielding box to absorb vibration interference.

[0011] A further preferred solution is that the elastic member includes a prism-shaped flexible rubber block and a limiting bolt arranged on the top of the prism-shaped flexible rubber block, and the pressing sheet is provided with a limiting hole matched with the limiting bolt.

[0012] It can be seen from the above scheme that the prism-shaped flexible rubber block is used to ensure that the prism-shaped flexible rubber block can automatically return to its original shape after deformation, and the prism-shaped structure has good stability, which can absorb vibration while ensuring the stability of the spherical shielding box. The limiting bolt cooperates with the limiting hole to prevent the spherical shielding box from deflecting.

[0013] A further preferred solution is that the suspension floating assembly is provided with eight groups of suspension ropes, and the eight groups of suspension ropes are respectively distributed on four groups of mutually perpendicular diagonals centered on the center of the spherical shielding box.

[0014] It can be seen from the above scheme that eight groups of suspension ropes are used and a distribution design of four groups of mutually perpendicular diagonals with the center of the sphere as the center is adopted to ensure that the spherical shielding box is subjected to uniform force. The upper four groups of suspension ropes provide the force required for suspension, and the lower four groups of suspension ropes are used to stabilize and limit the spherical shielding box.

[0015] A further preferred solution is that both side surfaces of the second shielding box and a surface away from the mounting panel are provided with flexible limit blocks adapted to the outer wall of the spherical shielding box.

[0016] It can be seen from the above scheme that the flexible limiting block is provided to limit the circumference of the spherical shielding box, thereby protecting the spherical shielding box from impact damage and absorbing lateral vibration, thereby absorbing vibration interference in all directions.

[0017] A preferred solution is that the first shielding box includes a cold-rolled plate, a sound insulation and shock-absorbing pad, a first sound-absorbing cotton, an acrylic inner plate and a second sound-absorbing cotton arranged in sequence from the outside to the inside, the second shielding box and the mounting panel both include a supporting frame and a polyurethane sponge arranged in sequence from the outside to the inside, and a third sound-absorbing cotton is arranged in the polyhedron shielding box.

[0018] As can be seen from the above scheme, the cold-rolled plate is used as the outer shell, and the sound insulation and shock-absorbing pad is used for sealing and buffering between the cold-rolled plate and the frame structure. The first sound-absorbing cotton and the second sound-absorbing cotton are used as internal and external sound insulation respectively, and the acrylic inner plate is used as a sound reflection surface to reduce external sound interference. The support frame is used to support the overall structure. The third sound-absorbing cotton is used as an internal sound-absorbing structure.

[0019] A preferred solution is that a wire passing channel is provided at the lower end of the side of the polyhedron shielding box, which passes through the second shielding box and the spherical shielding box and is connected to the outer wall of the first shielding box; a covering structure that cooperates with the wire passing channel is hingedly provided on the first shielding box, and sound insulation cotton is provided in the covering structure.

[0020] It can be seen from the above scheme that the test wiring harness is connected through the wire passage, and the wire passage is shielded and soundproofed by the sound insulation cotton on the cover structure.

[0021] A preferred solution is that the floating sealing door structure includes a box connecting panel, a movable bracket, a spherical sealing door and a protective cover, and the box connecting panel is provided with several groups of floating structures, and the floating structure includes a compression spring fixing seat and a compression spring, the compression spring fixing seat is fixed on the box connecting panel, the compression spring is arranged in the compression spring fixing seat, the end of the compression spring away from the compression spring fixing seat cooperates with the movable bracket, the movable bracket is slidably fitted on the box connecting panel through a guide column, a spherical connecting bracket is provided on the movable bracket, the spherical sealing door is connected to the spherical connecting bracket through a universal floating joint, the movable bracket is provided with several tension springs cooperating with the spherical sealing door, the protective cover is fixedly connected to the box connecting panel, and the box connecting panel is fixed on the shielding door.

[0022] It can be seen from the above scheme that under the action of the guide column and the floating structure, the spherical sealing door can float in a straight line within a certain distance; under the action of the universal floating joint and several tension springs, the spherical sealing door takes the connection center point between the universal floating joint and the spherical connecting bracket as the base point, and can float and offset a certain angle in any direction. As a result, the spherical sealing door can float within a relatively large range, so that when it cooperates with the installation panel, it can adaptively adjust its posture to achieve a good sealing effect, and automatically reset after opening.

[0023] A preferred solution is that a plurality of groups of air damping shock absorbers and a plurality of groups of universal movable wheels are arranged at the bottom of the outer box.

[0024] It can be seen from the above scheme that under the action of several groups of air damping shock absorbers, the noise interference caused by external vibration transmission can be reduced. By providing several universal moving wheels, it is convenient to move the outer box. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0026] Figure 2 is a cross-sectional view of the present invention;

[0027] Figure 3 yes Figure 2 A magnified view of part A;

[0028] Figure 4 is a schematic diagram of the three-dimensional structure of the inner box from a first viewing angle;

[0029] Figure 5 is a schematic diagram of the three-dimensional structure of the inner box from a second viewing angle;

[0030] Figure 6 is a schematic diagram of the exploded structure of the floating frame;

[0031] Figure 7 It is a schematic diagram of the exploded structure of the floating sealing door structure. DETAILED DESCRIPTION

[0032] like Figures 1 to 7 As shown, in this embodiment, the present invention includes an outer box 1 and an inner box 2, the outer box 1 includes a first shielding box 11 and a shielding door 12 hinged on the first shielding box 11, the inner box 2 includes a second shielding box 21, a spherical shielding box 22, a polyhedron shielding box 23 and an installation panel 24, the second shielding box 21 is loaded and fixed in the first shielding box 11, the spherical shielding box 22 is suspended in the second shielding box 21 through a hanging floating component, the installation panel 24 is fixed in the spherical shielding box 22, the installation panel 24 is fixedly arranged on the spherical shielding box 22 and connected to the second shielding box 21, the polyhedron shielding box 23 is fixed on the installation panel 24, the installation panel 24 is provided with a through opening adapted to the chamber opening of the polyhedron shielding box 23, and the shielding door 12 is provided with a floating sealing door structure 13 adapted to the installation panel 24. The bottom and top of the polyhedron shielding box 23 are both provided with a plurality of fixture installation holes 25, and the fixture of the product to be tested is fixed by connecting with a plurality of the fixture installation holes 25 through a plurality of support columns. A plurality of buckles are provided on the outer wall of the first shielding box 11, and a locking structure matching with the buckles is correspondingly provided on the shielding door 12.

[0033] In this embodiment, the spherical shielding box 22 is made of stainless steel, and the polyhedral shielding box 23 is made of acrylic. The spherical structure of the stainless steel is used to reflect sound waves, thereby improving isolation.

[0034] In this embodiment, the polyhedral shielding box 23 is an octahedral structure.

[0035] like Figure 4 and Figure 5As shown, in this embodiment, the suspension floating assembly includes eight groups of suspension ropes 26 and two groups of floating frames 27. The top and bottom of the spherical shielding box 22 are respectively connected to the second shielding box 21 by floating through two groups of floating frames 27. The outer wall of the spherical shielding box 22 is suspended by several groups of suspension ropes 26 and placed in the middle of the second shielding box 21. The spherical shielding box 22 is provided with a connecting seat that cooperates with the suspension rope 26, and a rope lock is provided on the connecting seat. The suspension rope 26 is a high molecular polyethylene rope.

[0036] like Figure 6 As shown, in this embodiment, the floating frame 27 includes a connecting frame 271 and a supporting frame 272, the supporting frame 272 is fixed on the second shielding box 21, a plurality of elastic members 273 are arranged on the supporting frame 272, the connecting frame 271 is connected to the spherical shielding box 22, and a pressing sheet 274 matching with the plurality of elastic members 273 is correspondingly arranged on the connecting frame 271. The elastic member 273 includes a prism-shaped flexible rubber block 273a and a limiting bolt 273b arranged on the top of the prism-shaped flexible rubber block 273a, and a limiting hole 275 matching with the limiting bolt 273b is arranged on the pressing sheet 274. The prism-shaped flexible rubber block 273a can be replaced by a compression spring.

[0037] In this embodiment, the suspension floating assembly is provided with eight groups of suspension ropes 26, and the eight groups of suspension ropes 26 are respectively distributed on four groups of mutually perpendicular diagonals centered at the center of the spherical shielding box 22. The four groups of suspension ropes 26 at the top are respectively connected to the four top corners of the second shielding box 21, and the four groups of suspension ropes 26 at the bottom are respectively connected to the four bottom corners of the second shielding box 21.

[0038] like Figure 5 As shown, in this embodiment, both side surfaces of the second shielding box 21 and a surface away from the mounting panel 24 are provided with flexible limit blocks 28 adapted to the outer wall of the spherical shielding box 22 .

[0039] In this embodiment, four groups of supporting and limiting feet are arranged at the bottom of the second shielding box 21, and the inner bottom of the first shielding box 11 is provided with card slots which cooperate with the four groups of supporting and limiting feet for limiting. The second shielding box 21 is limited by the card slot structure and the supporting and limiting feet, and it is ensured that the second shielding box 21 can be quickly and conveniently taken out for maintenance.

[0040] like Figure 3As shown, in this embodiment, the first shielding box 11 includes a cold-rolled plate 111, a sound insulation and shock-absorbing pad 112, a first sound-absorbing cotton 113, an acrylic inner plate 114 and a second sound-absorbing cotton 115 arranged in sequence from the outside to the inside, and the second shielding box 21 and the mounting panel 24 both include a supporting frame and a polyurethane sponge arranged in sequence from the outside to the inside, and the polyurethane sponge is filled in the frame of the supporting frame, and a third sound-absorbing cotton is arranged in the polyhedron shielding box 23.

[0041] In this embodiment, the lower end of the side of the polyhedron shielding box 23 is provided with a wire passage 29 that passes through the second shielding box 21 and the spherical shielding box 22 and communicates with the outer wall of the first shielding box 11. The first shielding box 11 is hingedly provided with a cover structure 14 that cooperates with the wire passage 29, and a sound insulation cotton 15 is arranged in the cover structure 14. The wire passage 29 is a flexible pipe that can adapt to a flexible wire harness, and the flexible material can reduce the transmission of interference such as sound wave vibration.

[0042] like Figure 7 As shown, in this embodiment, the floating sealing door structure 13 includes a box body connection panel 131, a movable bracket 132, a spherical sealing door 133 and a protective cover 134. The box body connection panel 131 is provided with a plurality of floating structures. The floating structure includes a compression spring fixing seat 135 and a compression spring. The compression spring fixing seat 135 is fixed on the box body connection panel 131. The compression spring is arranged in the compression spring fixing seat 135. One end of the compression spring away from the compression spring fixing seat 135 is connected to the movable bracket 132. The movable bracket 132 is slidably engaged with the box connecting panel 131 through a guide column 136, a spherical connecting bracket 137 is provided on the movable bracket 132, the spherical sealing door 133 is connected to the spherical connecting bracket 137 through a universal floating joint, and a plurality of tension springs 138 cooperating with the spherical sealing door 133 are provided on the movable bracket 132, the protective cover 134 is fixedly connected to the box connecting panel 131, and the box connecting panel 131 is fixed on the shielding door 12.

[0043] like Figure 1 As shown, in this embodiment, the bottom of the outer box 1 is provided with four sets of air damping shock absorbers 16 and four sets of universal movable wheels 17. The universal movable wheels 17 are self-locking casters. The top of the outer box 1 is provided with a lifting ring, through which the outer box 1 is transported.

[0044] The workflow of the present invention is:

[0045] The jig is fixed in the polyhedron shielding box 23 through the support column, and the guessed product is loaded on the jig, and the wire harness is connected for communication through the wire channel 29.

[0046] When the shielding door 12 is closed, the spherical sealing door 133 gradually approaches the installation panel 24. After the spherical sealing door 133 contacts the installation panel 24, the spherical sealing door 133 is appropriately rotated under the action of the universal floating joint to fit the installation panel 24. During the fitting process, the spherical sealing door 133 pushes the movable bracket 132 to compress the compression spring to provide pressure for sealing. After the sealing is completed, an acoustic test is performed.

[0047] When the shielding door 12 is opened, the spherical sealing door 133 is automatically reset under the action of the tension springs 138 .

Claims

1. Super performance single door soundproof box, characterized by: The invention comprises an outer box (1) and an inner box (2), wherein the outer box (1) comprises a first shielding box (11) and a shielding door (12) hinged on the first shielding box (11), and the inner box (2) comprises a second shielding box (21), a spherical shielding box (22), a polyhedron shielding box (23) and an installation panel (24), wherein the second shielding box (21) is loaded and fixed in the first shielding box (11), the spherical shielding box (22) is suspended in the second shielding box (21) by a suspension floating assembly, and the installation panel (24) is provided with a plurality of mounting holes. The panel (24) is fixed in the spherical shielding box (22); the mounting panel (24) is fixedly arranged on the spherical shielding box (22) and connected to the second shielding box (21); the polyhedron shielding box (23) is fixed on the mounting panel (24); the mounting panel (24) is provided with a through opening matched with the chamber opening of the polyhedron shielding box (23); the shielding door (12) is provided with a floating sealing door structure (13) matched with the mounting panel (24); the floating sealing door structure (13) comprises A box body connection panel (131), a movable bracket (132), a spherical sealing door (133) and a protective cover (134); the box body connection panel (131) is provided with a plurality of groups of floating structures; the floating structures include a compression spring fixing seat (135) and a compression spring; the compression spring fixing seat (135) is fixed to the box body connection panel (131); the compression spring is arranged in the compression spring fixing seat (135); one end of the compression spring away from the compression spring fixing seat (135) cooperates with the movable bracket (132); the movable bracket (132) is connected to the box body connection panel (131); The guide column (136) is slidably engaged with the box connection panel (131); a spherical connection bracket (137) is provided on the movable bracket (132); the spherical sealing door (133) is connected to the spherical connection bracket (137) via a universal floating joint; a plurality of tension springs (138) engaged with the spherical sealing door (133) are provided on the movable bracket (132); the protective cover (134) is fixedly connected to the box connection panel (131); and the box connection panel (131) is fixed on the shielding door (12).

2. The ultra-high performance single-door soundproof box according to claim 1 is characterized by: The suspension floating assembly comprises a plurality of groups of suspension ropes (26) and a plurality of groups of floating frames (27); the spherical shielding box (22) is floatingly connected in the second shielding box (21) via the floating frames (27); and the outer wall of the spherical shielding box (22) is suspended via the plurality of groups of suspension ropes (26) and is placed in the middle of the second shielding box (21).

3. The ultra-performance single-door soundproof box according to claim 2 is characterized by: The floating frame (27) comprises a connecting frame (271) and a supporting frame (272); the supporting frame (272) is fixed on the second shielding box (21); a plurality of elastic members (273) are arranged on the supporting frame (272); the connecting frame (271) is connected to the spherical shielding box (22); and a pressing sheet (274) matching with the plurality of elastic members (273) is arranged on the connecting frame (271).

4. The ultra-performance single-door soundproof box according to claim 3 is characterized by: The elastic member (273) comprises a prism-shaped flexible rubber block (273a) and a limiting bolt (273b) arranged on the top of the prism-shaped flexible rubber block (273a), and a limiting hole (275) adapted to the limiting bolt (273b) is arranged on the pressing sheet (274).

5. The ultra-performance single-door soundproof box according to claim 2 is characterized by: The suspension floating assembly is provided with a total of eight groups of suspension ropes (26), and the eight groups of suspension ropes (26) are respectively distributed on four groups of mutually perpendicular diagonals centered at the center of the spherical shielding box (22).

6. The ultra-high performance single-door soundproof box according to claim 1, characterized in that: Both side surfaces of the second shielding box (21) and a surface away from the mounting panel (24) are provided with flexible limiting blocks (28) adapted to the outer wall of the spherical shielding box (22).

7. The ultra-high performance single-door soundproof box according to claim 1 is characterized by: The first shielding box (11) comprises, from the outside to the inside, a cold-rolled plate (111), a sound-insulating and shock-absorbing pad (112), a first sound-absorbing cotton (113), an acrylic inner plate (114), and a second sound-absorbing cotton (115) which are arranged in sequence; the second shielding box (21) and the mounting panel (24) both comprise a supporting frame and a polyurethane sponge which are arranged in sequence from the outside to the inside; and a third sound-absorbing cotton is arranged in the polyhedron shielding box (23).

8. The ultra-high performance single-door soundproof box according to claim 1 is characterized by: A wire-passing passage (29) is provided at the lower end of the side of the polyhedron shielding box (23) and passes through the second shielding box (21) and the spherical shielding box (22) and is connected to the outer wall of the first shielding box (11); a cover structure (14) cooperating with the wire-passing passage (29) is hingedly provided on the first shielding box (11); and sound insulation cotton (15) is provided in the cover structure (14).

9. The ultra-high performance single-door soundproof box according to claim 1, characterized in that: A plurality of groups of air damping shock absorbers (16) and a plurality of groups of universal movable wheels (17) are arranged at the bottom of the outer box body (1).

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