Composite laminated glass, front windshield and vehicle-mounted howitzer

Abstract

The invention discloses composite laminated glass, a front windshield and a vehicle-mounted howitzer, and belongs to the technical field of vehicle-mounted howitzers, the composite laminated glass comprises a first inorganic glass layer, a second inorganic glass layer and a third inorganic glass layer, the first inorganic glass layer is arranged on the side away from the interior of a vehicle; the second inorganic glass layer is bonded with the first inorganic glass layer through a first bonding film; and the organic glass layer is arranged on one side close to the interior of the vehicle and is bonded with the second inorganic glass layer through a second bonding film. According to the composite laminated glass, the purpose of overall light weight is achieved by replacing part of inorganic glass with the organic glass, deformation and energy absorption needed under the anti-impact working condition are achieved through the high toughness of the organic glass, and the impact deformation capacity is improved; through reasonable interlayer design and specification selection of the inorganic glass and the organic glass, the service life is prolonged and the maintenance difficulty and cost are reduced on the premise of meeting the requirement of an anti-impact working condition.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle-mounted howitzers, and particularly to a composite laminated glass, a front windshield and a vehicle-mounted howitzer. Background Art

[0002] At present, vehicle-mounted howitzers are widely used as high-mobility combat platforms. During the firing process, the powerful muzzle shock wave causes a great load input to the front windshield, and extremely strict requirements are imposed on the strength of the front windshield glass. Common civilian vehicle glasses usually adopt single-layer tempered glass or double-layer laminated glass, which can meet the regulatory requirements and normal use of civilian vehicles. However, if they are applied to the front windshield of a vehicle-mounted howitzer chassis, they will be fragmented under the action of the overpressure shock wave generated during the firing of the vehicle-mounted howitzer (the positive pressure generated from the outside of the vehicle to the inside is about 1.2 bar, and the negative pressure generated from the inside of the vehicle to the outside is about 1.1 bar), and cannot meet the usage requirements. In order to ensure that the front windshield glass of the vehicle-mounted howitzer chassis meets the requirements of anti-overpressure impact, special glass is usually adopted. Traditional special glass mainly adopts a two-layer or multi-layer laminated structure of inorganic glass + inorganic glass, and has problems such as thick thickness and large weight; in addition, the connection method between the glass and the vehicle body usually adopts bonding, there is a lack of reasonable buffering measures between the two, and the disassembly and assembly convenience is poor.

[0003] In addition, during the actual use of vehicle-mounted howitzers, the cluster position firing method is usually adopted. Due to the limitation of the position, the distance between vehicles is relatively close, and the shock wave is likely to cause the ground gravel to splash, thus causing splash damage to nearby vehicles. And the front windshield glass is a brittle material. When the surface is damaged by the gravel splash, it is extremely easy to have accidents under the action of the shock wave. Summary of the Invention

[0004] The purpose of the present invention is to provide a composite laminated glass, a front windshield and a vehicle-mounted howitzer. The composite laminated glass has a more reasonable structure, a more compact thickness dimension and a lighter weight, effectively improving the lightweight level of the front windshield glass; the gluing of the composite laminated glass and the metal frame increases the buffering ability to the shock wave and has a certain convenience in maintenance disassembly. The anti-gravel splash device has good protection effect, excellent self-impact resistance, ingenious material selection, simple structure form, convenient disassembly and assembly, and convenient storage. After installing the anti-gravel splash device on the front windshield, the damage of the front windshield glass caused by the gravel splash under the position firing condition is avoided, and the reliability risk of vehicle use is greatly reduced without affecting the operation rhythm.

[0005] The present invention provides the following solutions:

[0006] In the first aspect, the present invention describes a composite laminated glass applied to the front windshield of a vehicle-mounted howitzer, including:

[0007] A first inorganic glass layer, which is arranged on the side far from the inside of the vehicle;

[0008] A second inorganic glass layer, which is bonded to the first inorganic glass layer through a first adhesive film;

[0009] An organic glass layer, which is arranged on the side close to the vehicle interior and is bonded to the second inorganic glass layer through a second adhesive film.

[0010] Preferably, the first inorganic glass layer is ultra-clear glass with a thickness of 4-6 mm, the second inorganic glass layer is ultra-clear glass with a thickness of 3-5 mm, the organic glass layer is a polycarbonate plate with a thickness of 1-3 mm; the first adhesive film is a polyvinyl butyral film, and the second adhesive film is a polyurethane film.

[0011] In a second aspect, the present invention discloses a front windshield, comprising:

[0012] A metal frame, which is detachably mounted on the vehicle body;

[0013] The above-mentioned composite laminated glass, the edge of which is mounted in the metal frame through an adhesive.

[0014] Preferably, it further comprises:

[0015] A front windshield anti-gravel spattering device, which is detachably connected to a connection structure arranged at the edge of the metal frame (5).

[0016] Preferably, the front windshield anti-gravel spattering device comprises:

[0017] A protective bearing surface, which covers the front windshield;

[0018] A pull belt, the front end and the rear end of the first end of which are respectively connected to the front side and the rear side of the edge of the protective bearing surface, the second end of which is mounted at the connection structure, and the pull belt is an elastic member.

[0019] Preferably, a plurality of pull belts are provided, each vertex of the protective bearing surface is respectively connected with one pull belt, the first end of the pull belt comprises a first connection part and a second connection part, the first connection part and the second connection part are arranged on the left and right sides of the vertex, and the vertex is fixedly connected inside the first connection part and inside the second connection part at the same time.

[0020] Preferably, the pull belt comprises an elastic connecting member and a protective layer coated outside the elastic connecting member, and the protective layer is connected to the protective bearing surface through a sewing process.

[0021] Preferably, the protective bearing surface includes at least one buffer layer and a waterproof layer covering the outside of the buffer layer. The buffer layer and the waterproof layer are connected by a sewing process. There are at least two sewing threads and they are symmetrically arranged. The sewing threads extend along the length direction of the protective bearing surface.

[0022] Preferably, the connection structure includes:

[0023] A connecting piece with mounting holes provided at both ends thereof;

[0024] A hook, with the first end of the hook disposed in the middle of the connecting piece, and the pulling belt is detachably connected to the second end of the hook;

[0025] A fastener that passes through the mounting hole to fixedly connect the connecting piece to the edge of the metal frame.

[0026] In a third aspect, the present invention also discloses a vehicle-mounted howitzer, which includes a storage box for a gravel splash prevention device and the above-mentioned front windshield.

[0027] The present invention has the following advantages compared with the prior art:

[0028] 1. The composite laminated glass of the present invention realizes the overall lightweight purpose by using organic glass to replace part of the inorganic glass, and utilizes the high toughness of the organic glass to achieve the deformation and energy absorption required under the impact condition, increasing the impact deformation ability. Through the reasonable laminated design and specification selection of the inorganic glass and the organic glass, the service life is improved, the maintenance difficulty and cost are reduced on the premise of meeting the impact condition requirements. By using a flexible adhesive to bond between the composite laminated glass and the metal frame, the restraint fixation and sealing of the composite laminated glass are ensured, and the anti-impact buffer between the two is also realized, effectively reducing the impact load on the glass itself. The connection between the metal frame and the vehicle body uses rigid bolts instead of the traditional bonding between the glass and the vehicle body, making the maintenance disassembly and assembly more convenient.

[0029] 2. The protective bearing surface of the gravel splash prevention device of the front windshield of the present invention reasonably selects high-toughness materials and high-elasticity materials for integration, and has the advantages of waterproof, flame-retardant, high buffering, etc. It can withstand the impact of flying gravel and the muzzle shock wave load, avoiding failure situations such as damage and tearing of the device itself, meeting the use of the device under the firing condition in the position, and preventing damage to the front windshield glass caused by flying gravel under the firing condition in the position. The use of an elastic pulling belt increases the convenience of device disassembly and assembly and also increases the installation stability under the repeated action of the shock wave. The whole device is made of flexible materials and uses a sewing process. The flexibility of the whole device enables it to be quickly and conveniently stored by bundling and rolling through a binding belt during the storage process, occupying a small space. Description of the Drawings

[0030] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0031] Figure 1 It is a schematic exploded view of the front windshield of the present invention;

[0032] Figure 2 It is a sectional view of one side of the composite laminated glass of the present invention;

[0033] Figure 3 It is a schematic diagram of the toughness of the composite laminated glass of the present invention;

[0034] Figure 4 It is a schematic diagram of the flexible connection of the composite laminated glass of the present invention;

[0035] Figure 5 It is a schematic diagram of the structure of the front windshield and the connection structure of the present invention;

[0036] Figure 6 It is a schematic diagram of the overall structure when the gravel splash prevention device of the front windshield of the present invention is installed on the front windshield;

[0037] Figure 7 It is a schematic diagram of the overall structure from another angle when the gravel splash prevention device of the front windshield of the present invention is installed on the front windshield;

[0038] Figure 8 It is the front view of the gravel splash prevention device of the front windshield of the present invention;

[0039] Figure 9 It is a sectional view of the protective bearing surface;

[0040] Figure 10 It is a sectional view of the pulling belt;

[0041] In the figure:

[0042] 1. Protective bearing surface; 11. Waterproof layer; 12. Buffer layer; 2. Pulling belt; 21. Protective layer; 22. Elastic connecting piece; 3. Binding belt; 4. Connection structure; 41. Connection piece; 42. Hook; 5. Metal frame; 6. Composite laminated glass; 61. First inorganic glass layer; 62. Second inorganic glass layer; 63. Organic glass layer; 7. Adhesive; 81. First adhesive film; 82. Second adhesive film; 9. Vehicle body. Specific embodiments

[0043] To make the objectives, technical solutions and advantages of this application clearer, the following will further describe this application in detail with reference to the accompanying drawings. Obviously, the described embodiments are only a part rather than all of the embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts shall fall within the scope of protection of this application.

[0044] The terms used in the embodiments of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The singular forms "a", "the" and "said" used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. "Plural" generally includes at least two.

[0045] It should be understood that the term "and / or" used herein is only a kind of association relationship describing associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after.

[0046] It should be understood that although terms such as first, second, and third may be used in the embodiments of this application for description, these descriptions should not be limited to these terms. These terms are only used to distinguish the descriptions. For example, without departing from the scope of the embodiments of this application, the first may also be called the second, and similarly, the second may also be called the first.

[0047] Depending on the context, words such as "if" and "when" as used herein may be interpreted as "when" or "while" or "in response to determining" or "in response to detecting". Similarly, depending on the context, the phrase "if determined" or "if detecting (stated condition or event)" may be interpreted as "when determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)".

[0048] It should also be noted that the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a commodity or device including a series of elements not only includes those elements but also includes other elements not explicitly listed, or further includes elements inherent to such commodity or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of another identical element in the commodity or device including said element.

[0049] It should be particularly noted that symbols and / or numbers existing in the specification that are not marked in the accompanying drawings are not reference numerals.

[0050] Example 1

[0051] Refer to Figure 1-4 As shown, a composite laminated glass 6 provided by an embodiment of the present application is applied to the front windshield of a vehicle-mounted howitzer, and includes:

[0052] The first inorganic glass layer 61 is arranged on the side away from the vehicle interior;

[0053] The second inorganic glass layer 62 is bonded to the first inorganic glass layer 61 through a first adhesive film 81;

[0054] The organic glass layer 63 is arranged on the side close to the vehicle interior and is bonded to the second inorganic glass layer 62 through a second adhesive film 82.

[0055] The first inorganic glass layer 61 serves as the main body for bearing external shock waves. It uses its own high strength to withstand shock wave loads. In addition, it has good wear resistance to adapt to the harsh external environment of the vehicle and ensure clear glass vision; the second inorganic glass layer 62 serves as an intermediate transition layer, playing a supporting role for the first inorganic glass layer 61. Other functional interlayers can also be added between the two to cope with various environments. For example, an electric heating element can be laid between the two to realize the electric heating of the composite laminated glass, thereby melting the ice and snow on the front windshield; the organic glass layer 63 is located on the inner side and is the glass layer closest to the vehicle occupants. The organic glass has good toughness, greatly improving the overall toughness of the composite laminated glass. When the first inorganic glass layer 61 and the second inorganic glass layer 62 are broken, the organic glass layer 63 prevents glass fragments from splashing into the vehicle, providing sufficient fragment protection ability for the vehicle occupants; the inner organic glass layer 63 also reduces the usage amount of inorganic glass to a certain extent, reducing the overall weight of the composite laminated glass and achieving overall lightweight; the first adhesive film 81 and the second adhesive film 82 are respectively used as the bonding elements for inorganic glass and inorganic glass, and inorganic glass and organic glass, ensuring the bonding reliability between the glass layers. When the composite laminated glass is subjected to shock wave impact and vibration, the deformation and displacement of each glass layer are synchronized, and it can more effectively resist shock wave loads.

[0056] Refer to Figure 1-4 As shown, the first inorganic glass layer 61 is ultra-clear glass with a thickness of 4 - 6 mm, the second inorganic glass layer 62 is ultra-clear glass with a thickness of 3 - 5 mm, and the organic glass layer 63 is a polycarbonate plate with a thickness of 1 - 3 mm; the first adhesive film 81 is a polyvinyl butyral film, and the second adhesive film 82 is a polyurethane film, which has good use effects, such as Figure 3 , 4As shown in the figure, △a represents the outward deflection deformation of the composite laminated glass under the impact vibration of the shock wave, △b represents the inward deflection deformation of the composite laminated glass under the impact vibration of the shock wave, θa represents the corresponding deformation angle when the composite laminated glass produces an outward deflection deformation under the impact vibration of the shock wave, and θb represents the corresponding deformation angle when the composite laminated glass produces an inward deflection deformation under the impact vibration of the shock wave. Under the action of an overpressure shock wave (the positive pressure generated from outside the vehicle to inside is about 1.2 bar, and the negative pressure generated from inside the vehicle to outside is about 1.1 bar), both △a and △b are 5 - 10 mm; both θa and θb are 1 - 2°, and the deformation amount and deformation angle are relatively small.

[0057] Embodiment 2

[0058] See Figure 1-5 As shown in the figure, a front windshield provided by an embodiment of the present application includes:

[0059] A metal frame 5, and the metal frame 5 is detachably installed on the vehicle body 9;

[0060] The above-mentioned composite laminated glass 6, and the edge of the composite laminated glass 6 is installed in the metal frame 5 through an adhesive 7.

[0061] The metal frame 5 is detachably installed on the vehicle body 9 through rigid bolts, replacing the traditional connection method of bonding between the glass and the vehicle body, and improving the convenience of maintenance and disassembly. The use of the adhesive 7 enables the flexible bonding of the composite laminated glass 6 and the metal frame 5, ensuring the restraint, fixation and sealing of the composite laminated glass 6, and at the same time realizing the buffering between the composite laminated glass 6 and the metal frame 5, effectively reducing the impact load on the composite laminated glass itself. When the shock wave acts on the composite laminated glass 6, the load is buffered to a certain extent under the elastic action of the adhesive 2, reducing the impact of the shock wave on the composite laminated glass 6 and improving the stress condition of the composite laminated glass 6. In this embodiment, the adhesive 7 is a polyurethane adhesive sealant.

[0062] See Figure 5-8 As shown in the figure, it further includes:

[0063] A front windshield gravel splash prevention device, and the front windshield gravel splash prevention device is detachably connected to a connection structure 4 provided at the edge of the metal frame 5.

[0064] The front windshield gravel splash prevention device reasonably selects high-toughness materials and high-elasticity materials for integration, and has the advantages of waterproof, flame-retardant, high buffering performance, etc. It can withstand the impact of flying gravel and the muzzle shock wave load, avoid failure situations such as damage and tearing of the device itself, meet the use of the device under the firing condition at the position, and prevent damage to the front windshield glass caused by gravel splash under the firing condition at the position. The gravel splash prevention device is detachably connected to the connection structure 4, and the disassembly and assembly are convenient.

[0065] See Figure 6-8 As shown, the front windshield gravel splash protection device includes:

[0066] A protective bearing surface 1, which covers the front windshield;

[0067] A pull belt 2, the front end and the rear end of the first end of the pull belt 2 are respectively connected to the front side and the rear side of the edge of the protective bearing surface 1, the second end of the pull belt 2 is installed at the connection structure 4, and the pull belt is an elastic member.

[0068] The protective bearing surface 1 of the present invention protects the front windshield to prevent damage to the front windshield glass caused by gravel splashing. The pull belt 2 is elastic. Whether the positive pressure or negative pressure of the shock wave acts on the protective bearing surface 1, the pull belt 2 is in a stretched state, which can effectively ensure that the pull belt 2 and the connection structure 4 are not disconnected, and the protective bearing surface 1 is always in the correct working position (in front of the front windshield), ensuring the installation stability under the repeated action of the shock wave.

[0069] See Figure 6-8 As shown, several pull belts 2 are provided. A pull belt 2 is respectively connected to each vertex of the protective bearing surface 1. The first end of the pull belt 2 includes a first connection part and a second connection part. The first connection part and the second connection part are arranged on the left and right sides of the vertex, and the vertex is fixedly connected inside the first connection part and the second connection part at the same time.

[0070] In this embodiment, a total of four pull belts 2 are provided, all of which are L-shaped and are respectively arranged at the four vertices of the protective bearing surface 1. The two right-angled sides of the L-shaped pull belt 2 are the first connection part and the second connection part respectively. Grooves are provided inside both the first connection part and the second connection part, and the left and right sides of the vertex are respectively sewn into the two grooves, and the right-angled part of the L-shaped pull belt 2 is installed at the connection structure 4.

[0071] See Figure 8 、 10 As shown, the pull belt 2 includes an elastic connection member 22 and a protective layer 21 wrapped outside the elastic connection member 22. The protective layer 21 is connected to the protective bearing surface 1 through a sewing process.

[0072] The pull belt uses the elastic connection member 22 as the main body, and the outside is wrapped with a protective layer 21 made of nylon woven fabric. The thickness of the nylon woven fabric is 2 mm, and the average unit weight is 200 g / ㎡. Using the tensile elasticity of the elastic connection member 22, whether the positive pressure or negative pressure of the shock wave acts on the protective bearing surface 1, the pull belt is in a stretched state, which can effectively ensure that the pull belt 2 and the front windshield are not disconnected, and the protective bearing surface 1 is always in the correct working position. The protective layer 21 is connected to the protective bearing surface 1 by a sewing process, which is convenient for winding the device into a cylindrical shape for storage.

[0073] The elastic connection member 22 is elastic rubber.

[0074] The elastic rubber is used as the elastic connecting member 22, and is integrally formed with the surface fabric through the sewing process, having the advantages of high elasticity and long durability, and can realize the installation of the device and ensure the installation reliability during the loading process of the device. Other materials with the same properties and functions can also be used, which are all within the protection scope of the present invention.

[0075] See Figure 8 、 9 As shown, the protective bearing surface 1 includes at least one layer of buffer layer 12 and a waterproof layer 11 covering the outside of the buffer layer 12. The buffer layer 12 and the waterproof layer 11 are connected through the sewing process. There are at least two sewing threads and they are symmetrically arranged. The sewing threads extend along the length direction of the protective bearing surface 1.

[0076] The protective bearing surface 1 includes one or more layers of stacked buffer layers 12. The waterproof layer 11 covers the outside of one buffer layer 12 or covers the whole outside of the multiple stacked buffer layers 12. In order to facilitate winding the device into a cylindrical shape for storage, the buffer layer 12 and the waterproof layer 11 are connected by the sewing process. In this embodiment, there are two sewing threads, which extend along the length direction of the protective bearing surface 1 and are evenly spaced in the width direction of the protective bearing surface 1.

[0077] The buffer layer 12 is a plastic foam buffer layer composed of polyethylene foam cotton, with a thickness of 10 mm per layer and a unit area weight of 180 g / ㎡. The waterproof layer 11 is a polyester waterproof coating cloth formed by pvc-impregnated polyester cloth, with a thickness of 0.65 mm after impregnation and a unit area weight of 678 g / ㎡. It has the advantages of waterproof, flame retardant, high buffering performance, etc., can withstand the impact of flying gravel and the muzzle shock wave load, avoid the device itself from being damaged, torn and other failure situations, and meet the use of the device under the condition of position launch. Other materials with the same properties and functions can also be used, which are all within the protection scope of the present invention.

[0078] See Figure 8 As shown, there are several strap mounting areas on the front side of the protective bearing surface 1, and straps 3 are sewn on the strap mounting areas.

[0079] The strap mounting areas are arranged in the middle of the front side of the protective bearing surface 1 and are located between two sewing threads. The straps are made of nylon fabric belts. After the device is rolled up, it is fixed into a cylindrical shape for storage through the straps 3.

[0080] See Figure 1 As shown, the connection structure 4 includes:

[0081] A connecting piece 41, with mounting holes provided at both ends of the connecting piece 41;

[0082] A hook 42, with the first end of the hook 42 arranged in the middle of the connecting piece 41, and the pull belt 2 is detachably connected to the second end of the hook 42;

[0083] The fastener passes through the mounting hole to fixedly connect the connecting piece 41 to the edge of the metal frame 5.

[0084] At the four corners of the edge of the metal frame 5, a number of positioning holes are provided, and each is equipped with a connecting structure 4. Since the whole device adopts lightweight materials, the device has a small weight and is convenient to pick up. When the device needs to be used, it can be quickly unfolded and the pull belt 2 can be hung on the connecting structure 4 at the four corners of the front windshield. After the device is used up, the pull belt 2 can be quickly separated from the connecting structure 4 by hand.

[0085] Both ends of the connecting piece 41 are provided with mounting holes so that the fastener can pass through the mounting holes to fixedly connect the connecting piece 41 to the edge of the metal frame 5. When using the device, the pull belt 2 is hung on the hook 42, and when it is used up, the pull belt 2 is removed from the hook 42. The disassembly is fast and convenient, meeting the operation time requirements.

[0086] Embodiment 3

[0087] A vehicle-mounted howitzer provided by an embodiment of the present application includes a storage box for preventing gravel splashing and the above-mentioned front windshield. A storage box for storing the retracted device is arranged inside the vehicle-mounted howitzer.

[0088] The working principle of the present invention is:

[0089] The present invention designs a composite laminated glass 6, in which the first inorganic glass layer 61 serves as the main body for bearing external shock waves, uses its own rigidity to withstand shock wave loads, and also has good wear resistance to adapt to the harsh external environment of the vehicle to ensure clear glass vision; the second inorganic glass layer 62 serves as an intermediate transition layer, playing a supporting role for the first inorganic glass layer 61, and other functional interlayers can also be added between the two to cope with various environments; the organic glass layer 63 is located inside and is the glass layer closest to the vehicle occupants. The organic glass has good toughness, greatly improving the overall toughness of the composite laminated glass. When the first inorganic glass layer 61 and the second inorganic glass layer 62 are broken, the organic glass layer 63 prevents glass fragments from splashing into the vehicle, providing sufficient fragment protection ability for the vehicle occupants; the inner organic glass layer 63 also reduces the usage amount of inorganic glass to a certain extent, reducing the overall weight of the composite laminated glass and achieving overall lightweight; the first adhesive film 81 and the second adhesive film 82 serve as the bonding elements between inorganic glass and inorganic glass, and between inorganic glass and organic glass respectively, ensuring the bonding reliability between the glass layers, and ensuring that when the composite laminated glass is impacted by shock waves, the glass layers deform and displace synchronously, and can more effectively resist shock wave loads.

[0090] The protective bearing surface 1 of the front windshield gravel splash prevention device of the present invention is reasonably selected by integrating high-toughness materials and high-elasticity materials, and has the advantages of waterproof, flame retardant, high buffering performance, etc. It can withstand the impact of splashing gravel and the muzzle shock wave load, avoiding failure situations such as damage and tearing of the device itself, meeting the use of the device under the condition of position firing, and preventing damage to the front windshield glass caused by gravel splashing under the condition of position firing. The pull belt 2 has elasticity. Whether the positive pressure or negative pressure of the shock wave acts on the protective bearing surface 1, the pull belt 2 is in a stretched state, which can effectively ensure that the pull belt 2 does not come off from the edge of the metal frame 5, and the protective bearing surface 1 is always in the correct working position (in front of the front windshield), ensuring the installation stability under the repeated action of the shock wave.

[0091] Under the condition of position firing, when this device needs to be used, untie the binding belt 3, quickly unfold the protective bearing surface 1, and then hang the second ends of the pull belts 2 connected to the four top corners on the connection structure 4 at the four corners of the front windshield. After the position firing is over, separate the pull belts 2 from the connection structure 4, and roll them up through the binding belt 3 and put them into the storage box of the gravel splash prevention device.

[0092] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts among the various embodiments can be referred to each other. For the system or device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method part.

[0093] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present application.

Claims

1. A composite laminated glass (6), applied to the front windshield of a vehicle-mounted howitzer, characterized in that: include: A first inorganic glass layer (61), wherein the first inorganic glass layer (61) is arranged on a side away from the interior of the vehicle; A second inorganic glass layer (62), wherein the second inorganic glass layer (62) is bonded to the first inorganic glass layer (61) via a first adhesive film (81); An organic glass layer (63), wherein the organic glass layer (63) is arranged on a side close to the interior of the vehicle and is bonded to the second inorganic glass layer (62) via a second bonding film (82).

2. The composite laminated glass (6) according to claim 1, characterized in that: The first inorganic glass layer (61) is ultra-white glass with a thickness of 4-6 mm, the second inorganic glass layer (62) is ultra-white glass with a thickness of 3-5 mm, and the organic glass layer (63) is a polycarbonate plate with a thickness of 1-3 mm; the first adhesive film (81) is a polyvinyl butyral film, and the second adhesive film (82) is a polyurethane film.

3. A front windshield, characterized in that: include: A metal frame (5), wherein the metal frame (5) is detachably mounted on the vehicle body (9); The composite laminated glass (6) according to claim 1 or 2, wherein the edge of the composite laminated glass (6) is installed in the metal frame (5) by means of adhesive (7).

4. The front windshield according to claim 3, characterized in that: Also includes: A front windshield gravel splash prevention device, wherein the front windshield gravel splash prevention device is detachably connected to a connection structure (4) arranged at the edge of the metal frame (5).

5. The front windshield according to claim 4, characterized in that: The front windshield gravel splash prevention device comprises: A protective bearing surface (1), wherein the protective bearing surface (1) covers the front windshield; A drawstring (2), wherein the front end and the rear end of the first end of the drawstring (2) are respectively connected to the front side and the rear side of the edge of the protective bearing surface (1), and the second end of the drawstring (2) is installed on the connecting structure (4), and the drawstring is an elastic member.

6. The front windshield according to claim 5, characterized in that: There are a plurality of drawstrings (2), and each vertex of the protective bearing surface (1) is connected to a drawstring (2). The first end of the drawstring (2) includes a first connecting portion and a second connecting portion. The first connecting portion and the second connecting portion are arranged on the left and right sides of the vertex, and the vertex is fixedly connected to the inside of the first connecting portion and the inside of the second connecting portion at the same time.

7. The front windshield according to claim 5, characterized in that: The drawstring (2) comprises an elastic connecting member (22) and a protective layer (21) wrapped around the elastic connecting member (22), and the protective layer (21) is connected to the protective bearing surface (1) by sewing technology.

8. The front windshield according to claim 5, characterized in that: The protective bearing surface (1) comprises at least one buffer layer (12) and a waterproof layer (11) coated outside the buffer layer (12); the buffer layer (12) and the waterproof layer (11) are connected by a sewing process; at least two sewing lines are provided and symmetrically arranged; the sewing lines extend along the length direction of the protective bearing surface (1).

9. The front windshield according to claim 5, characterized in that: The connection structure (4) comprises: A connecting piece (41), wherein both ends of the connecting piece (41) are provided with mounting holes; A hook (42), wherein a first end of the hook (42) is arranged in the middle of the connecting piece (41), and the drawstring (2) is detachably connected to a second end of the hook (42); A fastener is provided, wherein the fastener passes through the mounting hole to fix the connecting piece (41) to the edge of the metal frame (5).

10. A vehicle-mounted howitzer, characterized in that: The utility model comprises a storage box for a gravel splash prevention device and a front windshield as claimed in any one of claims 3 to 9.

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