CN109973585B - High-overload-resistant test control circuit composite protection structure - Google Patents
High-overload-resistant test control circuit composite protection structure Download PDFInfo
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- CN109973585B CN109973585B CN201910247198.6A CN201910247198A CN109973585B CN 109973585 B CN109973585 B CN 109973585B CN 201910247198 A CN201910247198 A CN 201910247198A CN 109973585 B CN109973585 B CN 109973585B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/022—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using dampers and springs in combination
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/023—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using fluid means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
- F16F15/08—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with rubber springs ; with springs made of rubber and metal
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/02—Details
- H05K5/0217—Mechanical details of casings
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/02—Details
- H05K5/0217—Mechanical details of casings
- H05K5/0234—Feet; Stands; Pedestals, e.g. wheels for moving casing on floor
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Mechanical Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Vibration Dampers (AREA)
Abstract
the invention discloses a high-overload-resistant test control circuit composite protection structure.A control host is arranged at the top of a shell, a damping base made of nylon plastics is arranged at the outer bottom of the shell, the damping base, the shell and the control host are connected into a whole by screws, a drive plate is arranged in the shell, a bottom plate is tightly attached to the inner bottom of the shell, a closed air damping cavity is formed between the bottom plate and a top plate, a damping rubber plate is arranged in the air damping cavity, and an exhaust hole is formed in the bottom plate; the epoxy resin protective layer is used for encapsulating electronic components and encapsulating the test control circuit substrate; the periphery of the test control circuit substrate is supported by a plurality of damping struts made of soft plastic materials, and the lower ends of the damping struts are placed on the top plate; polyurethane foaming layers are filled between the test control circuit substrate and the top plate and between the test control circuit substrate and the shell. The invention has compact and reasonable structure, high overload resistance, adaptability to severe environment, independent work of different energy buffer structures and avoidance of chain damage.
Description
Technical Field
The invention belongs to the technical field of circuit protection, and particularly relates to a high-overload-resistant test control circuit composite protection structure.
Background
With the rapid development of modern technology, the test control technology has increasingly wide application in many engineering fields, and particularly has obvious advantages in the test control under severe environment and complex conditions. The circuits of the test control devices such as an electronic pressure measuring bomb, an intelligent missile, an missile loading recorder, an unmanned aerial vehicle controller and the like are in a severe environment with high speed and high impact load. Therefore, the test control circuit must adopt a highly reliable design structure and an effective and feasible packaging technology to meet the technical requirements of miniaturization, high reliability and light weight. Since the test control circuit package structure directly affects the performance and usage of the test circuit, a high quality circuit package structure is one of the key issues that the test control circuit must solve. The high overload resistant integrated circuit protection structure provided by the invention can enable the test control circuit to be applied to severe and complex environments, improve the working reliability and the service life of the test control circuit, convert science and technology into productivity and play a greater role in economic construction.
Disclosure of Invention
In order to solve the problems, the invention provides a high-overload-resistant test control circuit composite protection structure which is compact and reasonable in structure, has high-overload-resistant capability, is suitable for severe environments, and avoids linkage damage because different energy buffer structures work independently, thereby solving the problems in the prior art.
The technical scheme adopted by the invention is that the composite protection structure of the high-overload-resistant test control circuit comprises a first-stage energy buffer structure, a second-stage energy buffer structure and a third-stage energy buffer structure;
The first-stage energy buffering structure comprises a shell, a control host is arranged at the top of the shell, a damping base made of nylon plastics is arranged at the outer bottom of the shell, the damping base, the shell and the control host are connected into a whole by fastening screws, and the fastening screws are arranged outside the shell;
the second-stage energy buffer structure comprises a drive plate, the drive plate is arranged inside the shell, the drive plate sequentially consists of a bottom plate and a top plate from bottom to top, the bottom plate is tightly attached to the bottom inside the shell, a closed air damping cavity is formed between the bottom plate and the top plate, a damping rubber plate is arranged in the air damping cavity, and an exhaust hole is formed in the bottom plate and is communicated with the air damping cavity and the outside of the shell;
The third-level energy buffer structure comprises an epoxy resin protective layer which is used for encapsulating electronic components and encapsulating a test control circuit substrate; the test control circuit substrate is arranged in the shell, the electronic components are arranged on the test control circuit substrate and connected with the control host through transmission wires, the periphery of the test control circuit substrate is supported by a plurality of damping struts made of soft plastic, and the lower ends of the damping struts are arranged on the top plate; polyurethane foaming layers are filled between the test control circuit substrate and the top plate and between the test control circuit substrate and the shell.
furthermore, the damping pillar is the cylinder, and the inside of damping pillar is equipped with the screw hole, installs the damping screw of soft plastics material in the screw hole, and the damping screw is used for connecting a plurality of test control circuit base boards, and the lower extreme of damping screw is placed on the roof.
Furthermore, the caliber of one end of the exhaust hole close to the air damping cavity is smaller than that of the other end of the exhaust hole, and the caliber of one end of the exhaust hole close to the air damping cavity is 1.2 mm.
Furthermore, a plurality of holes are uniformly formed in the damping rubber plate, and the aperture of each hole is 8-10 mm.
Furthermore, the lateral wall of casing is equipped with the notes material hole that is used for pouring into the polyurethane foaming layer to the casing, and the diameter of notes material hole is 6 mm.
Further, a polyurethane foam layer is filled between the bottom of the shell and the vibration damping base.
Furthermore, the bottom edge of casing is equipped with the flange structure, and the flange structure is last evenly to be equipped with a plurality of through-holes, and the edge of damping base evenly is equipped with a plurality of through-holes, and the through-hole at damping base edge corresponds with the through-hole at casing bottom edge, and fastening screw passes the through-hole and connects damping base, casing and main control system as an organic whole.
Furthermore, the vibration damping strut is made of polytetrafluoroethylene, and the vibration damping screw is made of nylon plastics; the bottom plate and the top plate are titanium alloy plates with the same structure, and the shell is made of 2A12-T4 aluminum alloy plates.
furthermore, the damping rubber plate is a ZN-1 type rubber plate with the elastic modulus of 1.04GPa and the thickness of 3mm, and the driving plate and the damping rubber plate are bonded through resin glue.
Furthermore, the fastening screw is made of stainless steel, and the length-to-outer diameter ratio of the fastening screw is 7: 1.
The invention has the advantages that:
1) The structure is compact and reasonable; the three-level energy buffer structure can be assembled in a split mode, under the action of high load, each energy buffer structure independently completes the corresponding anti-vibration buffer function, mutual influence is reduced, and chain damage is avoided.
2) The weight is light; under high impact load, the epoxy resin protective layer, the polyurethane foaming layer and the shell are used as stress carriers, so that the quality is reduced, and the reliability is improved.
3) The operation is simple; the polyurethane foaming layer is filled and sealed by adopting polyurethane foaming at one time, the material curing time is short, and the production efficiency is high.
4) The protective device has reasonable mechanical structure, good protective effect, high overload resistance and adaptability to severe environment; under the same environmental conditions, the stability of the test control circuit is higher.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a cross-sectional view of an embodiment of the present invention.
Fig. 2 is a cross-sectional view of a first stage energy buffer structure in an embodiment of the invention.
Fig. 3 is a top view of a first stage energy buffer structure in an embodiment of the invention.
fig. 4 is a plan view of a damping rubber plate in the embodiment of the present invention.
Fig. 5 is a cross-sectional view of a drive plate in an embodiment of the present invention.
FIG. 6 is a schematic diagram of a third stage energy buffer configuration in an embodiment of the present invention.
In the figure, 1, a shell, 2, a control host, 3, a damping support, 4, a damping screw, 5, a driving plate, 51, a bottom plate, 52, a top plate, 6, a damping rubber plate, 7, a damping base, 8, an epoxy resin protective layer, 9, a test control circuit substrate, 10, a fastening screw, 11, a polyurethane foaming layer, 12, 13, an exhaust hole, 14, an electronic component and 15, and a transmission lead.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to 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 derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
the structure of the present invention, as shown in fig. 1-6, includes a first level energy buffer structure, a second level energy buffer structure, and a third level energy buffer structure;
The first-stage energy buffer structure comprises a shell 1, a control host 2 is arranged at the top of the shell 1, a vibration damping base 7 is arranged below the bottom of the shell 1, the vibration damping base 7, the shell 1 and the control host 2 are connected into a whole by fastening screws 10, the fastening screws 10 are arranged outside the shell 1, and steering engine structural components are arranged inside the control host 2;
the second-stage energy buffering structure comprises a driving plate 5, the driving plate 5 is arranged inside the shell 1, the driving plate 5 sequentially consists of a bottom plate 51 and a top plate 52 from bottom to top, the bottom plate 51 is tightly attached to the bottom of the shell 1, a closed air damping cavity is arranged between the bottom plate 51 and the top plate 52, a damping rubber plate 6 is arranged in the air damping cavity, an exhaust hole 13 is formed in the bottom plate 51, and the exhaust hole 13 is communicated with the air damping cavity and the outside of the shell 1;
The third-level energy buffer structure comprises an epoxy resin protective layer 8, wherein the epoxy resin protective layer 8 is used for encapsulating an electronic component 14 and encapsulating a test control circuit substrate 9, the test control circuit substrate 9 is arranged inside the shell 1, the electronic component 14 is installed on the test control circuit substrate 9, the electronic component 14 is connected with the control host 2 through a transmission lead 15, and the transmission lead 15 comprises a control function lead and a test function lead; the periphery of the test control circuit substrate 9 is supported by a plurality of damping struts 3 made of polytetrafluoroethylene, and the lower ends of the damping struts 3 are placed on the top plate 52; polyurethane foam layers 11 are poured between the test control circuit board 9 and the top plate 52 and between the test control circuit board 9 and the housing 1.
The bottom edge of casing 1 is equipped with the flange structure, and the flange structure is last evenly to be equipped with a plurality of through-holes, and the edge of damping base 7 evenly is equipped with a plurality of through-holes, and the through-hole at damping base 7 edge corresponds with the through-hole at 1 bottom edge of casing, and fastening screw 10 passes the through-hole and connects damping base 7, casing 1 and main control system 2 as an organic whole, the dismouting of being convenient for fastening screw 10 arranges casing 1 outside in.
the cross section of drive plate 5, casing 1 is circular, and the external diameter of drive plate 5 and the internal diameter phase-match of casing 1 evenly are equipped with a plurality of holes 12 in the damping rubber board 6, and the storage has the air in hole 12, for 6 spaces that provide the deformation of rubber board, the aperture of hole 12 is 8~10 mm. The caliber of one end of the exhaust hole 13 close to the air damping cavity is smaller than that of the other end, and the diameter of one end of the exhaust hole 13 close to the air damping cavity is 1.2 mm; because the aperture of the exhaust hole 13 is small, air resistance damping is formed instantly, and the exhaust process is also a process of absorbing energy;
Test control circuit substrate 9 is the main part that needs the protection among this protective structure, arrange the inside middle part of casing 1 in, place from top to bottom, damping screw 4 through three nylon plastics material links into an organic whole, damping pillar 3 is the cylinder, the inside of damping pillar 3 is equipped with the screw hole, damping screw 4 installs in the screw hole, the lower extreme of damping screw 4 is placed naturally on roof 52, damping screw 4 specifically is the nylon screw, damping screw 4 atress warp, because the performance of nylon materials is sent, can not produce stress to test control circuit substrate, avoid causing the deformation of test control circuit substrate 9. The lateral wall of casing 1 is equipped with the notes material hole that is used for pouring into polyurethane foam layer 11 to casing 1, and the diameter of annotating the material hole is 6mm, pours into polyurethane foam layer 11 and fills the cavity in casing 1, links casing 1 and test control circuit board 9 as an organic whole.
the working principle of the embodiment of the invention is as follows:
The vibration damping base 7, the shell 1 and the fastening screw 10 are combined to form a first-stage energy buffering structure, the vibration damping base 7 is made of nylon plastics, and the vibration damping base is light in weight, high in resilience and extremely high in toughness; as shown in fig. 2-3, when a load acts on the vibration damping base 7, the stress surfaces are the end surface of the vibration damping base 7 and the end surfaces of the three fastening screws 10, when the vibration damping base 7 is subjected to an impact load, the body of the vibration damping base 7 axially contracts and radially extends to deform to absorb energy, and the deformed portion extends to the edge of the peripheral body, so that the diameter of the vibration damping base 7 is increased, the thickness of the vibration damping base 7 is decreased, and the impact energy is absorbed by the deformation of the body of the vibration damping base 7 to achieve the purpose of attenuating the energy; the deformation process of the vibration damping base 7 is carried out outside the shell 1, so that the structural relation inside the shell 1 is not influenced by the deformation; after the energy absorption is saturated, the fastening screws 10 transmit all the borne residual energy load to the outer wall of the control main machine 2 along the respective axial direction, and the energy of the residual energy load is not enough to influence the control main machine 2; the number of the fastening screws 10 is preferably three, because the fastening screws 10 are made of stainless steel, the ratio of the length to the outer diameter of the fastening screws is 7:1, the fastening screws 10 are inevitably subjected to bending deformation after being stressed, partial impact energy is absorbed, the bending deformation of the fastening screws 10 is outside the shell 1, the free space is large, the deformation is not more than 3mm, and the whole structure is not influenced.
4-5, after the vibration damping base 7 deforms, partial energy is absorbed, and unabsorbed energy is transmitted to the shell 1, the shell 1 is made of 2A12-T4 alloy aluminum, the material is light and high in strength, when an impact load is applied, a part of impact energy is transmitted to the outer wall of the control host 2 through the shell 1, and the other part of impact energy is transmitted to the driving plate 5, so that the bottom plate 51 of the driving plate 5 is displaced, and the top plate 52 of the driving plate 5 is tightly attached to the polyurethane foam layer 11 and the vibration damping strut 3, so that the top plate 52 is supported and is not easy to displace; an air damping cavity is arranged between the bottom plate 51 and the top plate 52, the damping rubber plate 6 deforms to absorb energy, a deformation body occupies a certain space in the deformation process of the damping rubber plate 6, the air damping cavity is a closed space, only the center of the bottom plate 51 is provided with the exhaust hole 13, and air in the air damping cavity is extruded to generate pressure and is exhausted from the exhaust hole 13. Because the aperture of the exhaust hole 13 is small, air resistance damping is formed instantly, the exhaust process is also a process of absorbing energy, and air damping is generated in the exhaust process to form secondary energy buffering. When the deformation is completed, the remaining energy of the load, which cannot be absorbed, is transmitted to the urethane foam layer 11 and the shock absorbing strut 3.
As shown in fig. 6, the shock absorbing strut 3, the epoxy resin protective layer 8 and the polyurethane foam layer 11 are combined to form a third-level energy buffering structure, the polyurethane foam layer 11 deforms under the action of an impact load transmitted by the driving plate 5, the shock absorbing strut 3 made of polytetrafluoroethylene deforms in the deformation process, when a foam body of the polyurethane foam layer 11 is impacted by the load, the porous characteristic of the foam body of the polyurethane foam layer 11 is utilized to seal, and the foam body absorbs energy through the processes of elastic deformation and yield deformation. The residual impact load energy acts on the test control circuit substrate 9, and because the epoxy resin protective layer 8 has the characteristics of high hardness, low shrinkage and high insulation, the epoxy resin protective layer 8 is adopted to encapsulate and encapsulate the test control circuit substrate 9 and encapsulate the electronic components 14, so that the test control circuit substrate 9 becomes a high-strength circuit module, and in the impact process, the electronic components 14 on the test control circuit substrate 9 do not have a moving space and cannot be displaced, so that the electronic components 14 are prevented from being detached, the circuit performance is ensured not to be invalid, electric signals are normally transmitted, and the protection target of the invention is achieved.
The electronic component 14 is an SMC component with high quality grade and high reliability, the test control circuit substrate 9 is a printed circuit board with strong impact resistance, and the reliable connection of the electrical performance is completed through an SMT technology; the electronic component 14 is encapsulated by an epoxy resin protective layer 8, after the electrical property is adjusted normally, the electronic component is integrally arranged in the shell 1, and the polyurethane foam layer 11 is filled into the cavity for foaming; the polyurethane foam layer 11 is made of rigid polyurethane foam material and is uniformly filled in the cavity of the shell 1 in a chemical foaming mode to well wrap the test control circuit substrate 9; the polyurethane body is filled in the whole cavity part in the shell 1, the transmission lead 15 is led out from the upper end and is connected with the control host 2, and the control host 2 is the core for providing system power, and particularly is a mechanical motor and other transmission parts. The invention improves the capability of resisting impact load from the whole structure of the test control circuit, and then the polyurethane foaming layer 11 is used for encapsulation, thereby reducing the weight, the structure is compact, and the structure volume is reduced.
The invention has compact structure of vibration reduction at all levels, reasonable design and simple assembly, and is suitable for mass production. The shell 1 is made of 2A12-T4 alloy aluminum, the vibration reduction base 7 is made of nylon plastic, the damping rubber plate 6 is made of ZN-1 type rubber plate with the elastic modulus of 1.04GPa and the thickness of 3mm, and the driving plate 5 and the damping rubber plate 6 are bonded with each other through resin glue. The damping base 7, the polyurethane foam layer 11 and the epoxy resin protective layer 8 which are made of nylon plastics are verified by tests, and performance parameters of the damping base cannot be replaced by other materials. The damping support 3 made of polytetrafluoroethylene and the damping screw 4 made of nylon plastics can be replaced by soft plastics.
the above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (10)
1. A high overload resistant test control circuit composite protection structure is characterized by comprising a first-stage energy buffer structure, a second-stage energy buffer structure and a third-stage energy buffer structure;
The first-stage energy buffering structure comprises a shell (1), a control host (2) is arranged at the top of the shell (1), a damping base (7) made of nylon plastic is arranged at the outer bottom of the shell (1), the damping base (7), the shell (1) and the control host (2) are connected into a whole through a fastening screw (10), and the fastening screw (10) is arranged outside the shell (1);
The second-stage energy buffering structure comprises a driving plate (5), the driving plate (5) is arranged inside the shell (1), the driving plate (5) sequentially consists of a bottom plate (51) and a top plate (52) from bottom to top, the bottom plate (51) is tightly attached to the bottom in the shell (1), a closed air damping cavity is formed between the bottom plate (51) and the top plate (52), a damping rubber plate (6) is arranged in the air damping cavity, an exhaust hole (13) is formed in the bottom plate (51), and the exhaust hole (13) is communicated with the air damping cavity and the outside of the shell (1);
The third-level energy buffer structure comprises an epoxy resin protective layer (8) for encapsulating electronic components (14) and encapsulating a test control circuit substrate (9); the testing control circuit substrate (9) is arranged in the shell (1), the electronic component (14) is arranged on the testing control circuit substrate (9), the electronic component (14) is connected with the control host (2) through a transmission lead (15), the periphery of the testing control circuit substrate (9) is supported by a plurality of damping support columns (3) made of soft plastic materials, and the lower ends of the damping support columns (3) are arranged on the top plate (52); polyurethane foam layers (11) are poured between the test control circuit substrate (9) and the top plate (52) and between the test control circuit substrate (9) and the shell (1).
2. The composite protection structure of the test control circuit for resisting high overload according to claim 1, wherein the damping support pillar (3) is a cylinder, a threaded hole is formed in the damping support pillar (3), a damping screw (4) made of soft plastic is installed in the threaded hole, the damping screw (4) is used for connecting a plurality of test control circuit substrates (9), and the lower end of the damping screw (4) is placed on the top plate (52).
3. The composite protection structure of the test control circuit for resisting high overload according to claim 1, wherein the caliber of one end of the exhaust hole (13) close to the air damping cavity is smaller than that of the other end, and the caliber of one end of the exhaust hole (13) close to the air damping cavity is 1.2 mm.
4. The high overload resistant test control circuit composite protection structure as claimed in claim 1, wherein a plurality of holes (12) are uniformly formed in the damping rubber plate (6), and the diameter of each hole (12) is 8-10 mm.
5. The composite protection structure of the test control circuit for resisting high overload according to claim 1, characterized in that the side wall of the shell (1) is provided with a material injection hole for injecting the polyurethane foam layer (11) into the shell (1), and the diameter of the material injection hole is 6 mm.
6. The composite protection structure of the test control circuit for resisting high overload according to claim 1, characterized in that a polyurethane foam layer (11) is filled between the bottom of the shell (1) and the vibration damping base (7).
7. The composite protection structure of the test control circuit for resisting high overload according to claim 1, characterized in that a flange structure is arranged at the bottom edge of the shell (1), a plurality of through holes are uniformly arranged on the flange structure, a plurality of through holes are uniformly arranged at the edge of the vibration damping base (7), the through holes at the edge of the vibration damping base (7) correspond to the through holes at the bottom edge of the shell (1), and fastening screws (10) penetrate through the through holes to connect the vibration damping base (7), the shell (1) and the control host (2) into a whole.
8. The high overload resistant test control circuit composite protective structure according to claim 2, wherein the damping strut (3) is made of polytetrafluoroethylene, and the damping screw (4) is made of nylon plastic; the bottom plate (51) and the top plate (52) are titanium alloy plates with the same structure, and the shell (1) is made of 2A12-T4 alloy aluminum plates.
9. The composite protection structure of the test control circuit for resisting high overload according to claim 1, wherein the damping rubber plate (6) is a ZN-1 type rubber plate with an elastic modulus of 1.04GPa and a thickness of 3mm, and the driving plate (5) and the damping rubber plate (6) are bonded with each other through resin glue.
10. The high overload resistant test control circuit composite protective structure according to claim 1, wherein the fastening screw (10) is made of stainless steel, and the length-to-outer diameter ratio of the fastening screw (10) is 7: 1.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910247198.6A CN109973585B (en) | 2019-03-29 | 2019-03-29 | High-overload-resistant test control circuit composite protection structure |
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| CN201910247198.6A CN109973585B (en) | 2019-03-29 | 2019-03-29 | High-overload-resistant test control circuit composite protection structure |
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| CN109973585A CN109973585A (en) | 2019-07-05 |
| CN109973585B true CN109973585B (en) | 2019-12-06 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110360259B (en) * | 2019-07-16 | 2021-04-27 | 西安微电子技术研究所 | Vibration reduction buffer structure applied to sensitive device and missile-borne equipment |
| CN111591464B (en) * | 2020-03-31 | 2023-07-28 | 上海卫星工程研究所 | Deep space impactor and impact protection performance evaluation method thereof |
| CN111654992A (en) * | 2020-06-01 | 2020-09-11 | 贵州航天控制技术有限公司 | Anti-overload large-temperature-impact-resistant four-channel steering engine controller |
| CN112212912A (en) * | 2020-09-03 | 2021-01-12 | 北京电子工程总体研究所 | Telemetering data recording device and manufacturing method |
| CN113190171A (en) * | 2021-04-02 | 2021-07-30 | 中国工程物理研究院总体工程研究所 | Data storage method based on high-speed impact environment |
| CN113446351B (en) * | 2021-05-24 | 2022-08-09 | 盛年科技有限公司 | A antidetonation vibration damper for equipment |
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