Composite reinforced armored car rearview mirror

Abstract

The invention provides a composite enhanced armored car rearview mirror which comprises a lens and a shell, a magnetorheological buffer layer is filled between the lens and the shell, and an annular electromagnetic coil is pre-buried in the shell and connected to a vehicle-mounted control system through a current controller. According to the magneto-rheological buffer layer, the rigidity of the buffer layer can be actively regulated and controlled by adjusting the size of a magnetic field, so that the buffer layer can adapt to impact and vibration of different intensities, and the battlefield adaptability and combat effectiveness of the rearview mirror are effectively improved; when being used for coping with vibration with different strengths, the magnetorheological buffer layer can attenuate vibration transmission by about 60% through rigidity adjustment, so that the possibility of breakage caused by collision between the shell and the lens is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of armored vehicles, in particular to a composite enhanced armored vehicle rearview mirror. Background Art

[0002] The armored vehicle rearview mirror is used by the driver to observe the situation behind the vehicle. It plays a very important role in the operation of the armored vehicle. If the rearview mirror is damaged, it will affect the safety of the armored vehicle.

[0003] Existing rearview mirrors for armored vehicles are mostly installed with the housing and the lens in direct contact, and there is no buffer material between the housing and the lens, which results in poor shock resistance of the rearview mirror and the inability to effectively absorb explosion shock or vibration energy; and the rearview mirror itself is not strong enough and is easily damaged in an impact or shelling vibration environment. At the same time, since the rearview mirror generally protrudes from the side of the armored vehicle, when passing through or moving relatively in a relatively narrow space, the lens may be scratched or deformed and shattered due to collision with obstacles or oncoming vehicles, which not only affects the observation field of view, but also the fragments may cause secondary damage to the vehicle and personnel. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a composite reinforced armored vehicle rearview mirror to solve the problems in the prior art that the armored vehicle rearview mirror has poor shock absorption performance and the lens is easily deformed and broken.

[0005] To achieve the above-mentioned purpose and other related purposes, the present invention provides a composite reinforced armored vehicle rearview mirror, including a lens and a shell, a magnetorheological buffer layer is filled between the lens and the shell, an annular electromagnetic coil is pre-buried inside the shell, and the annular electromagnetic coil is connected to the vehicle control system through a current controller.

[0006] Furthermore, the current controller controls the magnetic field of the annular electromagnetic coil to vary within the range of 0-1.2 T, and simultaneously achieves the stiffness of the magnetorheological buffer layer to vary within the range of 0.5-5 MPa.

[0007] Furthermore, the composite reinforced armored vehicle rearview mirror also includes an impact sensor, which detects the impact intensity in real time and feeds back to the vehicle control system, and automatically adjusts the magnetic field strength of the annular electromagnetic coil through a current controller.

[0008] Furthermore, the impact sensor is installed inside the housing, or installed at a bracket connecting the housing and the vehicle, or installed in an edge rubber strip.

[0009] Further, the magnetorheological buffer layer comprises the following components in parts by weight: 60-70 parts of rubber matrix, 30-40 parts of magnetic particles, 2-5 parts of plasticizer, 1-3 parts of tackifier and 1-2 parts of silane coupling agent.

[0010] Furthermore, the rubber matrix includes at least one of silicone rubber and polyurethane rubber; the magnetic particles include carbonyl iron powder; the plasticizer includes dioctyl phthalate; the tackifier includes rosin resin or petroleum resin.

[0011] Further, the magnetorheological buffer layer is made by the following preparation method: S1. Weigh each component except magnetic particles in proportion, and add them to a two-roll mill for premixing at room temperature for 10 minutes; S2. Slowly add magnetic particles during stirring and continue mixing for 20 minutes; S3. Place the mixed material in a vacuum degassing machine and degas it at -0.1 MPa for 30 minutes to remove the air bubbles in the material; S4. Inject the degassed material into a mold and pre-cure it at 80 °C for 30 minutes; S5. Uniformly apply a magnetic field of 0.5-1 T around the mold and cure it for 0.5-1 hour to make the magnetic particles align directionally; S6. Cure it at 120 °C for 2 hours to ensure that the material is completely cured; S7. After demolding, through cutting and polishing, the obtained magnetorheological buffer layer is obtained.

[0012] Further, the magnetorheological buffer layer is bonded to the lens and the housing respectively through polyurethane glue.

[0013] Further, the annular electromagnetic coil is integrated on the outer edge of the housing.

[0014] Furthermore, an annular installation groove is formed on the inner side of the outer edge of the housing, and the annular electromagnetic coil is arranged in the installation groove in a ring shape.

[0015] In an embodiment of the present invention, the lens is a self-healing lens, and the lens sequentially includes a toughened glass layer, a self-healing layer and a support layer from outside to inside. The self-healing layer is embedded with photocurable resin microcapsules; the shell material of the photocurable microcapsules includes polyurea, and the core material includes epoxy acrylate resin and photoinitiator.

[0016] Further, the photocurable resin microcapsules are obtained by the following preparation method: T1. Dissolve the polyurea prepolymer in an organic solvent to form an oil-phase solution, and dissolve the emulsifier in deionized water to form an aqueous-phase solution; T2. Slowly add the core material into the oil phase and mix evenly. Drop the oil phase-core material mixture into the aqueous solution and emulsify it using a high-speed homogenizer to form a water-in-oil emulsion. T3. Control the size of the emulsion droplets through a microfluidic device and carry out a polymerization reaction during the emulsification process. Control the reaction temperature at 40 - 60 °C and the reaction time at 2 - 4 hours. T4. Wash the generated microcapsules 3 - 5 times with deionized water, and then vacuum dry them at 40 °C for 12 hours to obtain dry photocurable resin microcapsules.

[0017] Furthermore, the particle size of the photocurable resin microcapsules is 5 - 10 μm.

[0018] Furthermore, the self-healing layer selects flexible substrates such as polyvinyl butyral film or polyurethane adhesive layer.

[0019] Furthermore, the tempered glass layer is chemically tempered glass doped with 10% - 15% alumina nanoparticles; the particle size of the alumina nanoparticles is 50 - 100 nm.

[0020] Furthermore, the support layer uses phenolic fiberglass prepreg.

[0021] Furthermore, the housing includes an outer shell layer and a reinforcement layer. The outer shell layer uses ABS plastic, and the reinforcement layer uses epoxy resin prepreg.

[0022] Furthermore, a bracket is also provided on the back of the housing. The bracket successively includes an ABS plastic layer, an epoxy fiberglass prepreg layer, a metal fastener layer, and an epoxy fiberglass prepreg layer.

[0023] As described above, the composite reinforced armored vehicle rearview mirror of the present invention has the following beneficial effects: 1. The magnetorheological buffer layer of the present invention can actively regulate the stiffness of the buffer layer by adjusting the magnetic field strength, enabling the buffer layer to adapt to impacts and vibrations of different intensities, effectively improving the battlefield adaptability and combat effectiveness of the rearview mirror; when dealing with vibrations of different intensities, the magnetorheological buffer layer of the present invention can attenuate about 60% of the vibration transmission through stiffness adjustment, thereby reducing the possibility of breakage caused by the collision between the housing and the lens.

[0024] 2. The lens of the present invention selects a composite structure embedded with photocurable resin microcapsules. When facing explosion shocks or severe vibrations, cracks are generated in the lens, which will trigger the rupture of the microcapsules. The resin inside the microcapsules cures and repairs under natural light or the irradiation of the vehicle-mounted UV lamp, realizing the anti-impact and self-healing functions of the lens to cope with some emergency situations.

[0025] 3. The present invention abandons single material and improves the shell, lens and bracket into a composite structure of multi-layer materials by introducing polymer materials, thereby enhancing the structural strength of the rearview mirror and improving its mechanical properties. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the cross-sectional structure of the composite reinforced armored vehicle rearview mirror disclosed in Example 1 of the present invention.

[0027] Figure 2 This is a schematic diagram of the cross-sectional structure of the self-repairing lens disclosed in Example 3 of the present invention.

[0028] Figure 3 It is a schematic diagram of the cross-sectional structure of the shell disclosed in Example 4 of the present invention.

[0029] Figure 4 It is a schematic diagram of the cross-sectional structure of the bracket disclosed in Example 4 of the present invention.

[0030] Component number description 1. Lens; 101. Tempered glass layer; 102. Self-repairing layer; 103. Support layer; 2. Shell; 201. Outer shell layer; 202. Reinforcement layer; 3. Bracket; 301. ABS plastic layer; 302. Epoxy resin prepreg layer; 303. Metal fastener layer; 304. Epoxy glass fiber prepreg layer; 4. Magnetorheological buffer layer; 401. Installation slot; 5. Edge tape. DETAILED DESCRIPTION

[0031] The following specific embodiments illustrate the implementation of the present invention, and those familiar with the technology can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0032] Example 1 See also Figure 1 The present invention provides a composite reinforced armored vehicle rearview mirror, comprising a shell 2 and a lens 1, wherein a magnetorheological buffer layer 4 is filled between the shell 2 and the lens 1, and an annular electromagnetic coil is pre-buried inside the shell 2, and the annular electromagnetic coil is connected to a vehicle control system through a current controller.

[0033] Compared with the traditional adhesive buffer layer which can only passively buffer, the magnetorheological buffer layer 4 of the present invention can adjust the magnetic field through the current controller to achieve active regulation of the stiffness of the magnetorheological buffer layer 4, so that the buffer layer can adapt to impacts and vibrations of different intensities, effectively improving the battlefield adaptability and combat effectiveness of the rearview mirror. When dealing with severe vibrations, the traditional adhesive buffer layer can only attenuate the vibration transmission by 20%, while the magnetorheological buffer layer 4 of the present invention can attenuate the vibration transmission by about 60% after the stiffness is adjusted.

[0034] Further, the current controller controls the magnetic field of the toroidal electromagnetic coil to vary within the range of 0 to 1.2 T, and synchronously realizes the variation of the stiffness of the magnetorheological buffer layer 4 within the range of 0.5 to 5 MPa. In the high-stiffness state, the magnetorheological buffer layer 4 can better resist explosion shocks or severe vibrations; in the low-stiffness state, the magnetorheological buffer layer 4 can absorb slight vibrations and extend the service life of the rearview mirror.

[0035] When the current is 0, the magnetic field of the toroidal electromagnetic coil is 0, and the magnetic particles in the magnetorheological buffer layer 4 are randomly distributed. The magnetorheological buffer layer 4 is a soft elastomer, suitable for absorbing slight vibrations; when the magnetic field of the toroidal electromagnetic coil is 0.2 to 0.5 T, the magnetic particles in the magnetorheological buffer layer 4 begin to be preliminarily arranged, and the stiffness of the magnetorheological buffer layer 4 increases, suitable for absorbing medium-strength impacts; when the magnetic field of the toroidal electromagnetic coil is 0.8 to 1.2 T, the magnetic particles in the magnetorheological buffer layer 4 are highly ordered, and the stiffness of the magnetorheological buffer layer 4 is significantly increased. At this time, it is suitable for resisting explosion shocks or severe vibrations.

[0036] Further, the composite reinforced armored vehicle rearview mirror of the present invention further includes an impact sensor, which real-time detects the impact intensity and feeds it back to the vehicle-mounted control system, so that the vehicle-mounted control system automatically adjusts the magnetic field intensity of the toroidal electromagnetic coil through the current controller, forming a closed-loop control system and improving the adaptability in the battlefield environment.

[0037] Furthermore, the impact sensor is installed inside the housing 2, or at the bracket 3 where the housing 2 is connected to the vehicle, or inside the edge seal strip 5. When the impact sensor is installed inside the housing 2, it can directly monitor the impact signal transmitted to the housing 2, with a fast response speed and good concealment, without affecting the appearance of the rearview mirror. When the impact sensor is installed at the bracket 3 where the housing 2 is connected to the vehicle, it can monitor the vibration signal transmitted from the vehicle to the rearview mirror, and is more suitable for detecting continuous vibrations during vehicle driving. When the impact sensor is installed inside the edge seal strip 5 connecting the lens 1 and the housing 2, it can directly monitor the impact signal received by the lens 1 and can detect explosion shocks or scratches.

[0038] Further, the magnetorheological buffer layer 4 is adhesively bonded to the lens 1 and the housing 2 respectively through polyurethane glue.

[0039] Further, the toroidal electromagnetic coil is integrated on the outer edge of the housing 2.

[0040] Further, an annular installation groove 401 is formed on the inner side of the outer edge of the housing 2, and the toroidal electromagnetic coil is arranged in the installation groove 401 in a ring shape.

[0041] Further, a wrapping rubber strip 5 is provided at the connection between the lens 1 and the housing 2, and the cross-section of the wrapping rubber strip 5 is in a "C" shape.

[0042] Embodiment 2 This embodiment provides the formulation of the magnetorheological buffer layer in Embodiment 1, including the following components in parts by weight: 60 - 70 parts of rubber matrix, 30 - 40 parts of magnetic particles, 2 - 5 parts of plasticizer, 1 - 3 parts of tackifier, and 1 - 2 parts of silane coupling agent.

[0043] Further, the rubber matrix includes at least one of silicone rubber and polyurethane rubber. Preferably, a blend of silicone rubber and polyurethane is used, which can balance the flexibility and adhesiveness of the buffer layer.

[0044] Further, the magnetic particles include carbonyl iron powder. Preferably, it is a blend of 95 - 98 parts by weight of carbonyl iron powder and 2 - 5 parts by weight of silicon steel powder, which can improve the magnetic permeability and reduce the loss.

[0045] Further, the plasticizer includes dioctyl phthalate. The addition of the plasticizer can improve the compatibility of the magnetorheological buffer layer with the lens and the housing, and enhance the interfacial adhesion performance.

[0046] Further, the tackifier includes rosin resin or petroleum resin.

[0047] Further, the silane coupling agent includes at least one of KH550, KH560, and KH570. The silane coupling agent can perform surface treatment on the magnetic particles and improve the interfacial bonding between the particles and the matrix.

[0048] Further, the magnetorheological buffer layer further includes 0.1 - 1 part by weight of antioxidant, and the antioxidant includes 2,6 - di - tert - butyl - p - cresol, which is used to improve the aging resistance of the buffer layer.

[0049] This embodiment also provides a preparation method of the magnetorheological buffer layer, including the following steps: S1. Weigh each component except the magnetic particles in proportion, and add them to a two - roll mill for premixing at room temperature for 10 - 20 minutes; S2. Slowly add the magnetic particles during stirring, and continue mixing for 20 - 30 minutes; S3. Place the mixed material in a vacuum degassing machine, and degas at - 0.1 MPa for 20 - 45 minutes to remove the air bubbles in the material; S4. Inject the degassed material into a mold, and pre - cure at 80°C for 30 minutes; S5. Uniformly apply a magnetic field of 0.5 - 1 T around the mold, and cure for 0.5 - 1 hour to align the magnetic particles; S6. Cure at 120 °C for 2 hours to ensure complete curing of the material; S7. After demolding, through cutting and grinding, the described magnetorheological buffer layer is obtained.

[0050] Example 3 This example provides a composite reinforced armored vehicle rearview mirror. Compared with Example 1, the only difference is that the lens is a self-repairing lens.

[0051] Reference Figure 2 , the lens 1 sequentially includes a toughened glass layer 101, a self-repairing layer 102, and a support layer 103 from outside to inside. The self-repairing layer is embedded with photocurable resin microcapsules; the shell material of the photocurable microcapsules includes polyurea, and the core material includes epoxy acrylate resin and a photoinitiator. The photoinitiator is preferably 2,4,6-trimethylbenzoyl-diphenylphosphine oxide.

[0052] In the face of explosion shock or severe vibration, cracks are generated in the lens, and the cracks will trigger the rupture of the microcapsules. The resin in the microcapsules cures and repairs under the irradiation of natural light or the on-vehicle UV lamp (wavelength 365 nm), which can cope with some emergency situations.

[0053] Furthermore, the photocurable resin microcapsules are obtained by the following preparation method: T1. Dissolve the polyurea prepolymer in an organic solvent to form an oil-phase solution, and dissolve the emulsifier in deionized water to form an aqueous-phase solution; T2. Slowly add the core material to the oil phase and mix evenly. Drop the oil-phase-core material mixture into the aqueous-phase solution and emulsify it using a high-speed homogenizer to form a water-in-oil emulsion; T3. Control the size of the emulsion droplets through a microfluidic device, and a polymerization reaction occurs during the emulsification process. The reaction temperature is controlled at 40-60 °C, and the reaction time is 2-4 hours; T4. Wash the generated microcapsules with deionized water 3-5 times, and then vacuum dry them at 40 °C for 12 hours to obtain the dried photocurable resin microcapsules.

[0054] Furthermore, the particle size of the photocurable resin microcapsules is 5-10 μm.

[0055] Furthermore, the self-repairing layer selects flexible substrates such as polyvinyl butyral film or polyurethane adhesive layer.

[0056] Furthermore, the toughened glass layer is chemically toughened glass doped with 10%-15% alumina nanoparticles; the particle size of the alumina nanoparticles is 50-100 nm.

[0057] Furthermore, the support layer uses phenolic fiberglass prepreg.

[0058] Example 4 This embodiment provides a composite enhanced armored vehicle rearview mirror. Compared with Embodiment 1, the only difference is that Referring to Figure 3 , the housing 2 includes an outer shell layer 201 and a reinforcing layer 202. The outer shell layer 201 is made of ABS plastic, and the reinforcing layer 202 is made of epoxy prepreg.

[0059] The installation groove 401 is provided around the outer edge of the inner surface of the reinforcing layer 202.

[0060] Referring to Figure 1 and Figure 4 , a bracket 3 is further provided on the back of the housing 2. The bracket 3 successively includes an ABS plastic layer 301, an epoxy prepreg layer 302, a metal fastener layer 303, and an epoxy glass fiber prepreg layer 304.

[0061] In summary, the magnetorheological buffer layer of the present invention can actively regulate the stiffness of the buffer layer by adjusting the magnetic field strength, enabling the buffer layer to adapt to impacts and vibrations of different intensities, effectively improving the battlefield adaptability and combat effectiveness of the rearview mirror; when dealing with vibrations of different intensities, the magnetorheological buffer layer of the present invention can attenuate about 60% of the vibration transmission through stiffness adjustment, thereby reducing the possibility of the housing and the lens colliding and breaking. The lens of the present invention selects a composite structure embedded with photocurable resin microcapsules. When facing explosion shocks or severe vibrations, cracks will occur in the lens, which will trigger the rupture of the microcapsules. The resin in the microcapsules will cure and repair under natural light or the illumination of the vehicle-mounted UV lamp, realizing the anti-impact and self-repair functions of the lens to cope with some emergency situations. Therefore, the present invention effectively overcomes various shortcomings in the prior art and has high industrial utilization value.

[0062] Among them, terms such as "upper", "lower", "left", "right", "front", "rear", "middle", and "one" cited in this specification are only for the convenience of clear narration and are not used to limit the scope of implementation of the present invention. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope of implementation of the present invention.

[0063] The above embodiments are only illustrative of the principles and effects of the present invention and are not used to limit the present invention. All equivalent modifications or changes made by those with ordinary knowledge in the technical field to which the present invention pertains without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A composite reinforced armored vehicle rearview mirror, characterized in that: It comprises a lens and a shell, wherein a magnetorheological buffer layer is filled between the lens and the shell, an annular electromagnetic coil is pre-buried inside the shell, and the annular electromagnetic coil is connected to a vehicle control system through a current controller.

2. The composite reinforced armored vehicle rearview mirror according to claim 1, characterized in that: The current controller controls the magnetic field of the annular electromagnetic coil to vary within the range of 0-1.2 T, and simultaneously achieves the stiffness of the magnetorheological buffer layer to vary within the range of 0.5-5 MPa.

3. The composite reinforced armored vehicle rearview mirror according to claim 1, characterized in that: The magnetorheological buffer layer comprises the following components in parts by weight: 60-70 parts of a rubber matrix, 30-40 parts of magnetic particles, 2-5 parts of a plasticizer, 1-3 parts of a tackifier and 1-2 parts of a silane coupling agent.

4. The composite reinforced armored vehicle rearview mirror according to claim 3 is characterized in that: The magnetorheological buffer layer is prepared by the following preparation method: S1. Weigh all components except magnetic particles in proportion and premix them at room temperature; S2. Slowly add magnetic particles during stirring and continue mixing for a while; S3, placing the mixed material in a vacuum degassing machine and degassing at -0.1MPa; S4, injecting the degassed material into the mold and pre-curing at 80°C for 30 minutes; S5. Apply a 0.5-1T magnetic field uniformly around the mold and cure for 0.5-1 hour; S6. Curing at 120°C for 2 hours to ensure that the material is fully cured; S7, after demoulding, cutting and polishing, the magnetorheological buffer layer is obtained.

5. The composite reinforced armored vehicle rearview mirror according to claim 1, characterized in that: An annular mounting groove is provided on the inner side of the outer edge of the shell, and the annular electromagnetic coil is arranged in the mounting groove.

6. The composite reinforced armored vehicle rearview mirror according to claim 1, characterized in that: It also includes an impact sensor, which detects the impact intensity in real time and feeds back to the vehicle-mounted control system, and automatically adjusts the magnetic field intensity of the annular electromagnetic coil through a current controller.

7. The composite reinforced armored vehicle rearview mirror according to claim 6, characterized in that: The impact sensor is installed inside the housing, or installed at a bracket connecting the housing and the vehicle, or installed in an edge rubber strip.

8. The composite reinforced armored vehicle rearview mirror according to any one of claims 1 to 7, characterized in that: The lens is a self-repairing lens, which includes a tempered glass layer, a self-repairing layer and a support layer from the outside to the inside, and light-curing resin microcapsules are embedded in the self-repairing layer; the shell material of the light-curing microcapsules includes polyurea, and the core material includes epoxy acrylate resin and a photoinitiator.

9. The composite reinforced armored vehicle rearview mirror according to claim 8, characterized in that: The particle size of the photocurable resin microcapsule is 5-10 μm.

10. The composite reinforced armored vehicle rearview mirror according to claim 8, characterized in that: The substrate of the self-repairing layer is selected from polyvinyl butyral film or polyurethane adhesive layer.

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