A composite enhanced armored vehicle rearview mirror

Abstract

The present invention provides a composite reinforced armored vehicle rearview mirror, comprising a lens and a housing. A magnetorheological buffer layer is placed between the lens and the housing. A toroidal electromagnetic coil is embedded within the housing and connected to the vehicle control system via a current controller. The magnetorheological buffer layer can actively regulate its stiffness by adjusting the magnetic field, enabling it to adapt to shocks and vibrations of varying intensities, effectively improving the rearview mirror's battlefield adaptability and operational effectiveness. When responding to vibrations of varying intensities, the magnetorheological buffer layer can attenuate vibration transmission by approximately 60% through stiffness adjustment, thereby reducing the likelihood of breakage caused by collision between the housing and the lens.

Description

Technical Field

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

[0002] The rearview mirror of an armored vehicle 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 armored vehicle rearview mirrors often utilize direct contact between the housing and the lens, without any buffering material between them. This results in poor shock resistance and inability to effectively absorb explosive shock or vibration energy. Furthermore, the mirrors themselves are weak and easily damaged by impact or artillery vibration. Furthermore, because the mirrors typically protrude from the sides of the armored vehicle, they can be scratched, deformed, or shattered when navigating narrow spaces or moving relative to each other due to collisions with obstacles or oncoming vehicles. This not only affects the field of view, but also poses a risk of secondary damage to the vehicle and personnel caused by the fragments. 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 of poor shock absorption performance of armored vehicle rearview mirrors and easy deformation and breakage of the lens.

[0005] To achieve the above-mentioned and other related purposes, the present invention provides a composite reinforced armored vehicle rearview mirror, comprising a lens and a shell, wherein a magnetorheological buffer layer is filled between the lens and the shell, and an annular electromagnetic coil is pre-embedded 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 a change in the stiffness of the magnetorheological buffer layer 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 on a bracket connecting the housing and the vehicle, or installed in an edge rubber strip.

[0009] Furthermore, 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.

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

[0011] Furthermore, the magnetorheological buffer layer is prepared by the following preparation method:

[0012] S1. Weigh all the components except the magnetic particles in proportion, add them to a two-roll mill and premix them at room temperature for 10 minutes;

[0013] S2. Slowly add magnetic particles during stirring and continue mixing for 20 minutes;

[0014] S3. Place the mixed material in a vacuum degassing machine and degas at -0.1 MPa for 30 minutes to remove bubbles in the material;

[0015] S4, injecting the degassed material into the mold and pre-curing at 80°C for 30 minutes;

[0016] S5. Apply a 0.5-1T magnetic field uniformly around the mold and cure for 0.5-1 hour to orient the magnetic particles.

[0017] S6. Curing at 120℃ for 2 hours to ensure that the material is fully cured;

[0018] S7. After demoulding, the magnetorheological buffer layer is obtained by cutting and polishing.

[0019] Furthermore, the magnetorheological buffer layer is bonded to the lens and the housing respectively through polyurethane adhesive.

[0020] Furthermore, the annular electromagnetic coil is integrated into the outer edge of the shell.

[0021] Furthermore, 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.

[0022] In one embodiment of the present invention, 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 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 photoinitiator.

[0023] Furthermore, the photocurable resin microcapsules are obtained by the following preparation method:

[0024] T1, dissolving the polyurea prepolymer in an organic solvent to form an oil phase solution, and dissolving the emulsifier in deionized water to form an aqueous phase solution;

[0025] T2. Slowly add the core material to the oil phase and mix evenly. Add the oil phase-core material mixture dropwise into the aqueous phase solution and emulsify using a high-speed homogenizer to form a water-in-oil emulsion.

[0026] T3, the emulsion droplet size is controlled by 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;

[0027] T4. Wash the generated microcapsules with deionized water for 3 to 5 times, and then vacuum dry them at 40° C. for 12 hours to obtain dry photocurable resin microcapsules.

[0028] Furthermore, the particle size of the photocurable resin microcapsules is 5-10 μm.

[0029] Furthermore, the self-repairing layer is made of a flexible substrate such as polyvinyl butyral film or polyurethane adhesive layer.

[0030] Furthermore, the tempered glass layer is chemically tempered glass doped with 10%-15% aluminum oxide nanoparticles; the particle size of the aluminum oxide nanoparticles is 50-100 nm.

[0031] Furthermore, the support layer is made of phenolic glass fiber prepreg.

[0032] Furthermore, the shell includes an outer shell layer and a reinforcement layer, the outer shell layer is made of ABS plastic, and the reinforcement layer is made of epoxy resin prepreg.

[0033] Furthermore, a bracket is provided on the back of the shell, and the bracket includes an ABS plastic layer, an epoxy glass fiber prepreg layer, a metal fastener layer and an epoxy glass fiber prepreg layer in sequence.

[0034] As described above, the composite reinforced armored vehicle rearview mirror of the present invention has the following beneficial effects:

[0035] 1. The magnetorheological buffer layer of the present invention can actively control the stiffness of the buffer layer by adjusting the magnitude of the magnetic field, 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 responding to vibrations of different intensities, the magnetorheological buffer layer of the present invention can attenuate vibration transmission by about 60% through stiffness adjustment, thereby reducing the possibility of breakage caused by collision between the shell and the lens.

[0036] 2. The lens of the present invention adopts a composite structure embedded with light-curing resin microcapsules. When facing explosion impact or severe vibration, the lens will crack, and the cracks will trigger the rupture of the microcapsules. The resin in the microcapsules will be cured and repaired under natural light or vehicle-mounted UV lamps, realizing the impact resistance and self-repair functions of the lens to cope with some emergency situations.

[0037] 3. The present invention abandons single materials and introduces polymer materials to improve the shell, lens and bracket into a composite structure of multi-layer materials, thereby improving the structural strength of the rearview mirror and improving its mechanical properties. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] 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.

[0039] Figure 2 Schematic diagram of the cross-sectional structure of the self-repairing lens disclosed in Example 3 of the present invention.

[0040] Figure 3 This is a schematic diagram of the cross-sectional structure of the shell disclosed in Example 4 of the present invention.

[0041] Figure 4 This is a schematic diagram of the cross-sectional structure of the bracket disclosed in Example 4 of the present invention.

[0042] Component number description

[0043] 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. Mounting slot; 5. Edge tape. DETAILED DESCRIPTION

[0044] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art 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 unless there is a conflict.

[0045] Example 1

[0046] 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.

[0047] Compared to traditional adhesive buffers, which only provide passive cushioning, the magnetorheological buffer layer 4 of the present invention can actively control its stiffness by adjusting the magnetic field using a current controller. This allows the buffer layer to adapt to varying shock and vibration intensities, effectively improving the rearview mirror's battlefield adaptability and operational effectiveness. When responding to severe vibration, traditional adhesive buffers can only attenuate vibration transmission by 20%, while the magnetorheological buffer layer 4 of the present invention, after adjusting its stiffness, can attenuate vibration transmission by approximately 60%.

[0048] Furthermore, a current controller controls the magnetic field of the annular electromagnetic coil to vary between 0 and 1.2 T, simultaneously varying the stiffness of the magnetorheological buffer layer 4 between 0.5 and 5 MPa. In the high-stiffness state, the magnetorheological buffer layer 4 can better withstand explosive shocks and severe vibrations; in the low-stiffness state, the magnetorheological buffer layer 4 absorbs minor vibrations, extending the life of the rearview mirror.

[0049] When the current is 0, the magnetic field of the annular electromagnetic coil is 0, the magnetic particles in the magnetorheological buffer layer 4 are randomly distributed, and the magnetorheological buffer layer 4 is a soft elastomer, which is suitable for absorbing slight vibrations; when the magnetic field of the annular electromagnetic coil is 0.2~0.5T, the magnetic particles in the magnetorheological buffer layer 4 begin to be preliminarily arranged, and the stiffness of the magnetorheological buffer layer 4 increases, which is suitable for absorbing medium-intensity impacts; when the magnetic field of the annular electromagnetic coil is 0.8~1.2T, the magnetic particles in the magnetorheological buffer layer 4 are highly ordered, and the stiffness of the magnetorheological buffer layer 4 is significantly improved, which is suitable for resisting explosion shocks or severe vibrations.

[0050] Furthermore, the composite reinforced armored vehicle rearview mirror of the present invention also includes an impact sensor, which detects the impact intensity in real time and feeds back to the vehicle control system, so that the vehicle control system automatically adjusts the magnetic field strength of the annular electromagnetic coil through the current controller, forming a closed-loop control system, thereby improving adaptability in battlefield environments.

[0051] Furthermore, the impact sensor is installed inside the housing 2, or at the bracket 3 connecting the housing 2 to the vehicle, or inside the edging strip 5. When the impact sensor is installed inside the housing 2, it can directly monitor the impact signal transmitted to the housing 2, has a fast response speed, good concealment, and does not affect the appearance of the rearview mirror. When the impact sensor is installed at the bracket 3 connecting the housing 2 to the vehicle, it can monitor the vibration signal transmitted from the vehicle to the rearview mirror, and is more suitable for detecting continuous vibration during vehicle driving. When the impact sensor is installed in the edging 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 impact or scratches.

[0052] Furthermore, the magnetorheological buffer layer 4 is bonded to the lens 1 and the housing 2 respectively through polyurethane adhesive.

[0053] Further, the annular electromagnetic coil is integrated on the outer edge of the housing 2.

[0054] Further, an annular installation groove 401 is formed on the inner side of the outer edge of the housing 2, and the annular electromagnetic coil is disposed around the installation groove 401.

[0055] 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.

[0056] Embodiment 2

[0057] This embodiment provides the formula 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.

[0058] 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 adhesion of the buffer layer.

[0059] Further, the magnetic particles include carbonyl iron powder. Preferably, a blend of 95-98 parts by weight of carbonyl iron powder and 2-5 parts by weight of silicon steel powder is used, which can improve the magnetic permeability and reduce the loss.

[0060] 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.

[0061] Further, the tackifier includes rosin resin or petroleum resin.

[0062] 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.

[0063] 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.

[0064] This embodiment also provides a preparation method of the magnetorheological buffer layer, including the following steps:

[0065] 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;

[0066] S2. Slowly add the magnetic particles during stirring, and continue mixing for 20-30 minutes;

[0067] S3. Place the mixed material in a vacuum degassing machine and degas at -0.1 MPa for 20 to 45 minutes to remove bubbles in the material;

[0068] S4, injecting the degassed material into the mold and pre-curing at 80°C for 30 minutes;

[0069] S5. Apply a 0.5-1T magnetic field uniformly around the mold and cure for 0.5-1 hour to orient the magnetic particles.

[0070] S6. Curing at 120℃ for 2 hours to ensure that the material is fully cured;

[0071] S7. After demoulding, the magnetorheological buffer layer is obtained by cutting and polishing.

[0072] Example 3

[0073] This embodiment provides a composite enhanced armored vehicle rearview mirror. Compared with Example 1, the only difference is that the lens is a self-repairing lens.

[0074] refer to Figure 2 The lens 1 comprises, from the outside to the inside, a tempered glass layer 101, a self-repairing layer 102, and a support layer 103. The self-repairing layer is embedded with photocurable resin microcapsules. The photocurable microcapsules have a shell material comprising polyurea and a core material comprising epoxy acrylate resin and a photoinitiator. The photoinitiator is preferably 2,4,6-trimethylbenzoyl-diphenylphosphine oxide.

[0075] When facing explosion impact or severe vibration, the lens will crack, and the cracks will trigger the rupture of the microcapsules. The resin in the microcapsules will be cured and repaired under natural light or vehicle-mounted UV lamp (wavelength 365nm), which can cope with some emergency situations.

[0076] Furthermore, the photocurable resin microcapsules are obtained by the following preparation method:

[0077] T1, dissolving the polyurea prepolymer in an organic solvent to form an oil phase solution, and dissolving the emulsifier in deionized water to form an aqueous phase solution;

[0078] T2. Slowly add the core material to the oil phase and mix evenly. Add the oil phase-core material mixture dropwise into the aqueous phase solution and emulsify using a high-speed homogenizer to form a water-in-oil emulsion.

[0079] T3, the emulsion droplet size is controlled by 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;

[0080] T4. Wash the generated microcapsules with deionized water for 3 to 5 times, and then vacuum dry them at 40° C. for 12 hours to obtain dry photocurable resin microcapsules.

[0081] Furthermore, the particle size of the photocurable resin microcapsules is 5-10 μm.

[0082] Furthermore, the self-repairing layer is made of a flexible substrate such as polyvinyl butyral film or polyurethane adhesive layer.

[0083] Furthermore, the tempered glass layer is chemically tempered glass doped with 10%-15% aluminum oxide nanoparticles; the particle size of the aluminum oxide nanoparticles is 50-100 nm.

[0084] Furthermore, the support layer is made of phenolic glass fiber prepreg.

[0085] Example 4

[0086] This embodiment provides a composite reinforced armored vehicle rearview mirror, which is different from the first embodiment only in that:

[0087] refer to Figure 3 The shell 2 includes an outer shell layer 201 and a reinforcement layer 202. The outer shell layer 201 is made of ABS plastic, and the reinforcement layer 202 is made of epoxy resin prepreg.

[0088] The mounting groove 401 is arranged around the outer edge of the inner surface of the reinforcement layer 202 .

[0089] refer to Figure 1 and Figure 4 The back of the shell 2 is further provided with a bracket 3, and the bracket 3 includes an ABS plastic layer 301, an epoxy resin prepreg layer 302, a metal fastener layer 303 and an epoxy glass fiber prepreg layer 304 in sequence.

[0090] In summary, the magnetorheological buffer layer of the present invention can actively regulate the stiffness of the buffer layer by adjusting the size of the magnetic field, so that the buffer layer can adapt to shocks and vibrations of different intensities, effectively improving the battlefield adaptability and combat effectiveness of the rearview mirror; when responding to vibrations of different intensities, the magnetorheological buffer layer of the present invention can attenuate the vibration transmission by about 60% through stiffness adjustment, thereby reducing the possibility of breakage caused by collision between the shell and the lens. The lens of the present invention uses a composite structure embedded with photocurable resin microcapsules. When facing explosive shock or severe vibration, the lens will crack, and the cracks will trigger the rupture of the microcapsules. The resin in the microcapsules will be cured and repaired under natural light or vehicle-mounted UV lamps, realizing the impact resistance and self-repairing functions of the lens to cope with some emergency situations. Therefore, the present invention effectively overcomes the various shortcomings of the prior art and has high industrial utilization value.

[0091] Among them, the terms such as "upper", "lower", "left", "right", "front", "back", "middle" and "one" quoted in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present invention. Changes or adjustments to their relative relationships should be regarded as the scope of implementation of the present invention without substantially changing the technical content.

[0092] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Any equivalent modifications or variations made by persons skilled in the art without departing from the spirit and technical concepts disclosed herein shall be encompassed by the claims of the present invention.

Claims

1. A composite reinforced armored vehicle rearview mirror, characterized in that: The vehicle comprises a lens and a housing, wherein a magnetorheological buffer layer is filled between the lens and the housing, and an annular electromagnetic coil is embedded in the housing. The annular electromagnetic coil is connected to the vehicle control system via a current controller. The current controller controls the magnetic field of the annular electromagnetic coil to vary within the range of 0 to 1.2 T, thereby simultaneously varying the stiffness of the magnetorheological buffer layer within the range of 0.5 to 5 MPa. 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; 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℃ for 2 hours to ensure that the material is fully cured; S7. After demoulding, the magnetorheological buffer layer is obtained by cutting and polishing.

2. 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.

3. 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 control system, and automatically adjusts the magnetic field intensity of the annular electromagnetic coil through a current controller.

4. The composite reinforced armored vehicle rearview mirror according to claim 3, characterized in that: The impact sensor is installed inside the housing, or installed on a bracket connecting the housing and the vehicle, or installed in an edge rubber strip.

5. The composite reinforced armored vehicle rearview mirror according to any one of claims 1 to 4, 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. Photocurable resin microcapsules are embedded in the self-repairing layer; the shell material of the photocurable resin microcapsules includes polyurea, and the core material includes epoxy acrylate resin and a photoinitiator.

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

7. The composite reinforced armored vehicle rearview mirror according to claim 5, characterized in that: The base material of the self-repairing layer is a polyvinyl butyral film or a polyurethane adhesive layer.

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