A projectile recovery device

Abstract

The present invention relates to a projectile recovery device, specifically, a device for buffering and collecting projectiles shot horizontally by a catapult device within a short distance. Compared with the prior art, the present invention utilizes the deep cavity shape unique to common tires and the high elasticity, large damping and impact resistance of rubber, cord and steel wire composite materials, which can effectively implement frontal buffering and rebound blocking for incoming high-speed projectiles. The narrow deep-hole buffer recovery space is formed by combining serially connected tires, which can effectively limit the rebound path and rebound stroke of the projectile. In addition, the filling of buffer materials in the tire cavity and the net bag in the optimized solution can further improve the buffering efficiency, safety and service life of the device. The whole solution has a compact structure, a short recovery stroke, high recovery efficiency, and controllable rebound of the projectile, which is suitable for use in a small space.

Description

Technical Field

[0001] The invention relates to a projectile recovery device, in particular to a device for buffering and storing a projectile ejected horizontally by an ejection device within a short distance. Background Art

[0002] In the research and development process of launching devices such as drones and fire-extinguishing bombs, it is often necessary to debug and test the performance of the launching device through simulated loads. Due to the constraints of the test environment, it is usually necessary to buffer and store the simulated loads ejected at high speed within a certain space range to avoid damage to the test site and related equipment and facilities. In practice, such recovery devices adopt either a grid method or a frame method. The former uses a safety net to buffer and recover the simulated load as a projectile, while the latter uses a buffer pad inside the frame to buffer and recover the simulated load. Generally speaking, the grid method occupies a large space and the rebound path of the projectile is difficult to control. The frame method is bulky, heavy, has a large recovery impact, and the recovery pad is easily damaged. Especially when the test site space is small, the use of the above two methods is limited. Summary of the invention

[0003] The technical problem to be solved by the present invention is that the grid method occupies a large space and the rebound path of the projectile is difficult to control, while the frame method is bulky, heavy, has a large recovery impact, and the recovery pad is easily damaged. Especially when the test site space is small, the use of the above two methods is limited. In order to solve the above problems, the present invention provides a projectile recovery device.

[0004] The objective of the present invention is achieved in the following manner: a projectile recovery device comprises a base, a pair of longitudinal beams, a pair of side rails, a plurality of tires and a counter-impact member; the longitudinal beams are connected to the base; the two side rails are respectively hinged on the two longitudinal beams; each side rail comprises a longitudinal rod and a pair of vertical rods, the two vertical rods are respectively located at the front and rear ends of the longitudinal rod and are perpendicular to and coplanar with the longitudinal rod, and the ends of the two vertical rods are coaxially hinged at the front and rear ends of the longitudinal beam; each tire is arranged in sequence between the front and rear vertical rods of the two side rails in the longitudinal direction with the sidewalls leading, and is placed between the two longitudinal beams in the transverse direction; the counter-impact member is arranged between two adjacent tires, and the rear end face of the counter-impact member covers the wheel hub hole of the tire behind it and is supported on the sidewall of the tire; the longitudinal rods of the two side rails are each supported on the crown of the tire, and are tightened to each other through the side rail connector.

[0005] As an optimization, the impact member is a flexible fiber mesh, and among all tires, at least one tire at the rear is completely covered and fastened with the mesh. As a further optimization, a net-shaped buffer column is filled in the cylindrical space surrounded by one or more tire beads covered with the flexible fiber mesh, and the net-shaped buffer column is made of elastic buffer material.

[0006] As an optimization, a tire lining buffer body is filled in the annular cavity surrounded by the inner liner layer of the tire, and the tire lining buffer body is made of elastic buffer material.

[0007] As an optimization, the tires are tied together with ropes, with the front sidewall of the front tire close to the front upright of the siderail, and the rear sidewall of the rear tire maintaining a distance from the rear upright of the siderail.

[0008] As an optimization, the base includes at least two cross beams arranged in the longitudinal direction, the longitudinal beams are connected to each cross beam in a detachable connection manner, and there are at least two groups of connection interfaces between each cross beam and each longitudinal beam.

[0009] Compared with the prior art, the present invention utilizes the unique deep cavity shape of commonly used tires and the high elasticity, large damping and impact resistance of rubber, cord and steel wire composite materials to effectively implement frontal buffering and rebound blocking for incoming high-speed projectiles. A narrow deep-hole buffer recovery space is formed by combining serially connected tires, which can effectively limit the rebound path and rebound stroke of the projectile. In addition, the filling of buffer materials in the tire cavity and the net bag in the optimized scheme can further improve the buffering efficiency, safety and service life of the device. The entire scheme has a compact structure, a short recovery stroke, high recovery efficiency, and controllable projectile rebound, and is suitable for use in narrow spaces. At the same time, the tires do not have to be brand new, and waste tires can also be used. The filling cushioning material can be selected from commonly used packaging cushioning materials such as EPE foam plastics, so the entire technical solution has good economic efficiency. In the optimized solution of the present invention, the tires are pressed tightly by the side rails and the tires are bundled together by ropes. When the incoming projectile hits the woven net wrapped around the rear tire, the rear tire and the internal filler that bear the impact are deformed, and at the same time, all the front tires are driven forward together by the bundling ropes until the rear sidewall of the rearmost tire is pressed tightly against the rear upright of the side rail. In this process, the friction between the crown of each tire and the longitudinal rod and longitudinal beam of the side rail (or the ground) becomes a buffering resistance, which can effectively increase the buffering energy consumption and reduce the rebound kinetic energy of the projectile. By adjusting the length of the siderail longitudinal rod connecting piece, the pressing force of the siderail longitudinal rod on the tire can be adjusted, and then the proportion of friction energy consumption in the entire buffer energy consumption and the size of the buffer overload can be conveniently and flexibly adjusted within a certain range; in the optimization scheme of the present invention, the longitudinal beam and each cross beam are connected through different connecting interfaces on the cross beam, which can change the spacing between the longitudinal beams and then change the height of the tire supported by the crown on the longitudinal beam from the ground, thereby adapting to the recovery of flat-projectiles at different flight altitudes. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a three-dimensional appearance diagram of a first usage state of a first embodiment of a projectile recovery device (small spacing between longitudinal beams and elevated recovery holes).

[0011] Figure 2It is a three-dimensional appearance diagram of the second usage state (longitudinal beams have a large spacing, and the recovery hole is lowered) of the first embodiment of a projectile recovery device.

[0012] Figure 3 It is a cross-sectional view of a first usage state of a first embodiment of a projectile recovery device.

[0013] Figure 4 This is a diagram showing the configuration of the two tire rope nets covering the tail portion of the first embodiment of a projectile recovery device.

[0014] Figure 5 This is a schematic diagram of the state of a projectile recovery device after recovery and the projectile movement process in the first embodiment.

[0015] Figure 6 It is a cross-sectional view of a second embodiment of a projectile recovery device.

[0016] Figure 7 It is a cross-sectional view of a third embodiment of a projectile recovery device.

[0017] Among them, 1-base; 2-longitudinal beam; 3-side rail; 4-tire; 5-buffer in tire; 6-buffer column in net; 7-rope net; 8-binding belt; 9-side rail connector; 10-impact plate; 11-crossbeam; 21-end plate; 22-side rail hinge support; 31-longitudinal rod; 32-vertical rod; 100-projectile. DETAILED DESCRIPTION

[0018] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0019] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0023] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0025] The first embodiment of the present invention, the state before the flat-projectile 100 is recovered in this embodiment is as follows Figure 1 , Figure 2 and Figure 3 The state after recovery and the movement process of the projectile 100 in the recovery device are shown in FIG. Figure 5 As shown, a projectile recovery device, such as Figure 1~Figure 4 As shown, it includes a set of base 1, a pair of longitudinal beams 2, a pair of side rails 3, nine tires 4 of the same specifications and the same number of tire buffer bodies 5, a buffer column 6 in the net, a rope net 7, a plurality of sets of strapping belts 8 and side rail connectors 9, etc.

[0026] The base 1 is composed of a pair of cross beams 11, which are aligned transversely and arranged longitudinally. The cross beam 11 is made of angle steel, and its bottom edge is fixed to the ground or the installation table by anchor bolts. Its vertical edge is symmetrically provided with bolt connection holes with the two longitudinal beams 2. The connection holes are all horizontal long holes, and a pair of holes aligned vertically is a group. There are six groups of connection holes, which are symmetrically distributed on the vertical edge of the cross beam 11 angle steel, and the horizontal spacing between adjacent hole groups on each side is equal.

[0027] The two longitudinal beams 2 have the same shape and size, are aligned in the longitudinal direction, and are symmetrically arranged in the transverse direction relative to the front and rear cross beams 11. The main body of the longitudinal beam 2 is made of rectangular hollow steel, and end plates 21 are set at both ends. A group of connecting holes distributed in a 2×2 rectangular array are opened on the end plate 21, and the connecting holes can be aligned one by one with any two adjacent groups of long holes on the cross beam 11. The longitudinal beam 2 is connected to the cross beam 11 by a bolt group through the connecting holes on its end plate 21 that match the corresponding connecting holes on the cross beam 11. When the end plate 21 of each longitudinal beam 2 is matched and connected with the two adjacent groups of long holes on the inner side of the cross beam 11, the distance between the two longitudinal beams 2 is small, such as Figure 1 As shown, when the end plate 21 of each longitudinal beam 2 is matched and connected with the two sets of adjacent long holes on the outer side of the cross beam 11, the distance between the two longitudinal beams 2 is large, such as Figure 2 Side rail hinge supports 22 are provided above both ends of the longitudinal beam 2 for hingedly connecting the side rail 3 .

[0028] The two side rails 3 are of the same shape and size and are hinged to the two longitudinal beams 2. Each side rail 3 includes a longitudinal rod 31 and a pair of vertical rods 32, both made of steel pipes. The two vertical rods 32 are of the same shape and size and are located at the front and rear ends of the longitudinal rod 31, respectively, and are perpendicular to and coplanar with the longitudinal rod 31. The ends of the two vertical rods 32 are respectively provided with hinge holes, and the two hinge holes are coaxial and their common axis is parallel to the axis of the longitudinal rod 31. Each side rail 3 is hinged to the side rail hinge supports 22 at both ends of the longitudinal beam 2 on the same side through the hinge holes at the ends of its two vertical rods 32 and the pins.

[0029] The annular cavity (tire lining) of each tire 4 surrounded by the inner liner is filled with a tire lining buffer body 5, the tire lining buffer body 5 is made of foamed polyethylene plastic (EPE pearl cotton), and the tire lining buffer body 5 and the inner liner of the tire 4 are in a moderately tensioned state.

[0030] Each tire 4 containing a tire cushioning body 5 is arranged in sequence in the longitudinal direction with the sidewall leading the upright posture, the sidewalls of adjacent tires 4 are close together, and the crowns under all tires 4 are supported on two longitudinal beams 2, so that each tire 4 is coaxially aligned in the transverse direction. Figure 1 and Figure 2 As shown, when the spacing between the longitudinal beams 2 is set differently, the height of the centerline of each tire 4 is also different. When the two longitudinal beams 2 are set to a small spacing, the centerline of each tire 4 is higher. When the two longitudinal beams 2 are set to a large spacing, the centerline of each tire 4 is lower.

[0031] The last two tires 4 at the tail are completely covered and tied with a rope net 7 made of flexible high-strength fibers, and a net buffer column 6 is filled in the cylindrical space surrounded by the front and rear net surfaces and the tire 4 bead. The rope net 7, the tire 4 tread and the end surface of the net buffer column 6 are in a moderately tight state. Figure 4 As shown, the buffer column 6 in the net is made of foamed polyethylene plastic (EPE pearl cotton).

[0032] The two tires 4 at the rear and the seven tires 4 at the front covered by the rope net 7 are tied tightly with four sets of high-strength fiber strapping belts 8, each set of strapping belts 8 is evenly distributed along the circumference of the tire 4, and each set of strapping belts 8 is tied around the inner and outer surfaces and ends of the tubular assembly composed of nine tires 4. At the rear of the inner surface of the tubular assembly, the strapping belt 8 passes through the mesh of the rope net 7 covering the front and rear end surfaces of the two tires 4 at the rear end, and the joint between the tire bead and the buffer column 6 in the net. At the outer surface and the rear end surface of the tubular assembly, the strapping belt 8 covers the outside of the rope net 7. In actual implementation, the strapping belt 8 can be selected as a fastening belt assembly commonly used for freight strapping of shelf products.

[0033] The tubular assembly of tires 4 bound together by the strapping belt 8 is arranged longitudinally close to the front end of the longitudinal beam 2, with its front end surface close to or close to the front upright pole 32 of the side rail 3, and its rear end surface maintains a relatively large distance from the rear upright pole 32 of the side rail 3.

[0034] The longitudinal bars 31 of the two side rails 3 are supported above the crown side of each tire 4, and the longitudinal bars 31 of the two side rails 3 are mutually tightened by the front and rear sets of side rail connectors 9. In actual implementation, the side rail connector 9 can be selected as a tie-down belt assembly commonly used for freight bundling of shelf products.

[0035] A second embodiment of the present invention is a projectile recovery device, such as Figure 6 As shown. Different from the first embodiment, the number of tires 4 and corresponding tire lining buffer bodies 5 is ten, wherein the tenth tire 4 containing the tire lining buffer body 5 is arranged behind the tire covered by the rope net 7, and the bundling and covering method of the first nine tires 4 is exactly the same as that of the first embodiment. Compared with the first embodiment, the second embodiment can provide a larger deformation amount and deformation damping energy consumption when subjected to the first impact of the projectile 100, thereby reducing the recovery overload.

[0036] A third embodiment of the present invention is a projectile recovery device, such as Figure 7 As shown. Different from the first and second embodiments, the rope net 7 is replaced by a collision plate 10, which is composed of a light metal plate and a rubber plate, and has an outer diameter no larger than that of the tire 4. The collision plate 10 is placed between the third to last and the fourth to last tires 4 in the longitudinal direction, and is supported on two longitudinal beams 2 in the transverse direction. When the third embodiment is subjected to the first impact of the projectile 100, the deformation and energy dissipation process of the rear tire 4 and the tire buffer 5 is different from that of the first and second embodiments.

[0037] The present invention can also be implemented in many other specific ways, for example:

[0038] a) The base 1 is a platform or ground, and the longitudinal beam 2 is directly fixed on the platform or ground through a pressure plate or foot bolts;

[0039] b) The cross beam 11 of the base 1 is made of a rectangular cross-section profile, and the longitudinal beam 2 is connected to the cross beam 11 in a posture of being supported on the cross beam 11. The number of cross beams 11 can also be 4;

[0040] c) The two longitudinal beams 2 do not need to be symmetrical with respect to the cross beam 11 in the transverse direction. Based on the first embodiment, the end plate 21 of one longitudinal beam 2 is matched and connected with two groups of adjacent long holes on the inner side of the cross beam 11, and the end plate 21 of the other longitudinal beam 2 is matched and connected with two groups of adjacent long holes on the outer side of the cross beam 11. The distance between the two longitudinal beams 2 is between Figure 1 The first use state shown is the longitudinal beam 2 spacing and Figure 2 The second use state shown is between the longitudinal beams 2;

[0041] d) The two longitudinal beams 2 do not need to be symmetrical with respect to the cross beam 11 in the transverse direction. The cross beam 11 of the base 1 has more groups of connection interfaces with the longitudinal beams 2. Each longitudinal beam 2 is connected to the cross beam 11 through different interfaces, so that more combinations of the spacing of the cross beams 11 can be formed; or, each longitudinal beam 2 can be connected to the cross beam 11 at any position on the cross beam 11, so that the spacing of the longitudinal beams 2 can be adjusted steplessly;

[0042] e) The longitudinal beams 2 are arranged symmetrically with an appropriate angle, and the tires 4 have different specifications; when the front end spacing of the longitudinal beams 2 is greater than the rear end spacing, the outer diameter of the front tire 4 is also greater than the outer diameter of the rear tire 4, and the friction force of each tire 4 moving backward during the recovery buffering process can be continuously increased; when the front end spacing of the longitudinal beams 2 is less than the rear end spacing, the outer diameter of the front tire 4 is also less than the outer diameter of the rear tire 4, and a hole with a small mouth and a large belly and approximately a cone shape can be obtained, which can more reliably seal the rebounding projectile 100 in the inner cavity of the tire assembly;

[0043] f) The longitudinal beam 2 may also adopt a step-shaped structure in a horizontal plane, and accordingly, the tires 4 supported on different sections of the longitudinal beam 2 may adopt different specifications;

[0044] g) The number of tires 4 can be greater, so that the tire combination fills the space between the front and rear uprights 32 of the side rail 3 in the longitudinal direction;

[0045] h) The vertical pole 32 of the side fence 3 adopts a telescopic structure with adjustable length;

[0046] i) using a belt net woven from flexible high-strength fibers to cover the tail tire 4;

[0047] j) using flexible high-strength fiber cloth to cover the tail tire 4;

[0048] k) The strapping belt 8 for strapping the tire 4 is elastic.

[0049] The working process of the first embodiment of the present invention is as follows: the projectile 100 is aimed at the hole of the tire group and shot into it, and hits the flexible rope net 7 wrapped around the tire 4 at the bottom of the hole, driving the rope net 7 to compress the tire 4 in the net, the buffer body 5 in the tire, and the buffer body in the net to deform and absorb energy while moving backward. Due to the action of the strapping belt 8, the front tire 4 is driven to move backward together. In this process, the friction between each tire 4 and the longitudinal beam 2 and the longitudinal rod 31 of the side rail 3 further consumes the kinetic energy of the projectile 100. After the rear tire 4 is stopped by the rear vertical rod 32 of the side rail 3, the tire 4 in the net, the buffer body 5 in the tire, and the buffer body in the net are further squeezed to the maximum deformation. The horizontal speed of the projectile 100 is reduced to 0, and then the tire 4 in the net, the buffer body 5 in the tire and the buffer body in the net produce elastic recovery, and the projectile 100 rebounds. Since the energy previously absorbed by friction and material deformation damping has been dissipated, the rebound kinetic energy of the projectile 100 is greatly attenuated, and the arc of the flight trajectory is enlarged, and finally it lands at the bottom of the hole of the tire group at a larger angle. The deep cavity in the tire 4 and the steel wire bead structure inherent in the tire 4 effectively stop the projectile 100 that recoils forward. The elasticity and damping of the tire 4 itself and the buffer body 5 contained in the tire further consume the remaining kinetic energy of the projectile 100 until it is completely braked. After the recovery is completed, the tension connection between the longitudinal rods 31 of the two side rails 3 is released, the two side rails 3 are lowered, and then the bundling of the tires 4 is loosened, and the corresponding tires 4 are separated, and the recovered projectile 100 can be taken out. The working process of other embodiments of the present invention is basically the same or similar to the working process of the first embodiment described above.

[0050] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several changes and improvements can be made without departing from the overall concept of the present invention, which should also be regarded as the scope of protection of the present invention.

Claims

1. A projectile recovery device, characterized in that: The tire comprises a base, a pair of longitudinal beams, a pair of side rails, at least two tires and a counter-impact member, wherein the pair of longitudinal beams are arranged on the base; the two side rails are respectively hinged on the two longitudinal beams; each side rail comprises a longitudinal rod and a pair of vertical rods, the two vertical rods are respectively located at the front and rear ends of the longitudinal rod and are perpendicular to and coplanar with the longitudinal rod, and the ends of the two vertical rods are coaxially hinged to the front and rear ends of the longitudinal beam; the tires are arranged longitudinally in sequence between the front and rear vertical rods of the two side rails with the tire sidewalls leading, and the tires are placed transversely between the two longitudinal beams; the counter-impact member is arranged between two adjacent tires, and the rear end surface of the counter-impact member covers the hub hole of the rear tire and is supported on the sidewall of the tire; the longitudinal rods of the two side rails are each supported on the tire crown, and the two side rails are tightened to each other through the side rail connector; A tire cushioning body made of elastic cushioning material is filled in the annular cavity surrounded by the tire inner liner. The tires are tied together with ropes and belts, with the front sidewall of the front tire close to the front upright of the siderail, and the rear sidewall of the rear tire maintaining a distance from the rear upright of the siderail. The projectile is aimed at the hole of the tire group and shot into it. The tire performs frontal cushioning and rebound blocking on the incoming projectile, limiting the rebound path and rebound stroke of the projectile.

2. The projectile recovery device according to claim 1, characterized in that: The impact member is a flexible fiber mesh. Among all tires, at least one tire at the rear is completely covered and fastened with the mesh.

3. The projectile recovery device according to claim 2, characterized in that: A net-shaped buffer column is filled in a cylindrical space surrounded by one or more tire beads covered with a flexible fiber mesh. The net-shaped buffer column is made of elastic buffer material.

4. The projectile recovery device according to claim 1, characterized in that: The base comprises at least two longitudinally arranged crossbeams, the longitudinal beams are connected to each crossbeam in a detachable connection manner, and there are at least two groups of connection interfaces between each crossbeam and each longitudinal beam.

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