Buffer protection device

Abstract

The invention discloses a buffer protection device, which belongs to the technical field of impact resistance protection of fuse modules, and comprises an inner protection sleeve, an outer protection sleeve and a support column, a hollow part for placing a module is arranged in the inner protective sleeve, a first concave part and a first convex part are arranged on the peripheral wall of the inner protective sleeve, and a second convex part and a second concave part which are matched and embedded with the outer protective sleeve are arranged on the outer protective sleeve, so that the outer protective sleeve is matched and embedded on the inner protective sleeve, and radial force transmission decomposition is realized through the concave parts and the convex parts; radial force impact in the inner protective sleeve is reduced; the supporting columns are arranged in the inner and outer protective sleeves at intervals in the circumferential direction, provide axial support for the device and provide recovery elastic force for the outer protective sleeve. The buffer protection device is simple in structure, convenient to machine and manufacture, low in cost and good in radial and axial overload impact resisting effect, the outer protection sleeve, the inner protection sleeve, the supporting columns and the modules are arranged in a mutually separated mode, and the vibration superposition phenomenon in the buffer protection process is greatly reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of anti-impact protection of fuze modules, and in particular relates to a buffer protection device. Background Art

[0002] As the speed of weapon systems increases, the corresponding protective fortifications are also getting stronger. Electromechanical fuzes need to withstand more severe penetration environments. In order to prevent the fuze from failing in such harsh penetration environments, it is usually necessary to provide buffer protection for the core functional modules of the fuze.

[0003] The common practice at present is to use epoxy resin potting to protect the core functional modules of the fuze. However, this mode has defects such as insufficient strength and easy crushing when experiencing large overload impact. In addition, when experiencing multiple impacts, the energy of extrusion deformation needs to be released, which will cause significant oscillation superposition phenomenon. This oscillation superposition phenomenon will affect the layer counting judgment of the sound signal for multi-layer targets. Summary of the invention

[0004] In view of one or more of the above defects or improvement needs in the prior art, the present invention provides a buffer protection device, which can achieve radial and axial impact protection for the module and reduce the shock superposition phenomenon.

[0005] To achieve the above object, the present invention provides a buffer protection device, which includes an inner protective sleeve, an outer protective sleeve and a support column;

[0006] The inner protective sleeve is a cylindrical structure, which is hollow inside and is used to place the module; the outer peripheral wall of the inner protective sleeve is alternately provided with first recessed portions and first protruding portions in the circumferential direction;

[0007] The outer protective sleeve is an annular structure and is sleeved on the inner protective sleeve; the second recessed portions and the second protruding portions are alternately arranged on the inner circumferential wall of the outer protective sleeve in sequence, and the second protruding portion is embedded in the first recessed portion, and the first protruding portion is embedded in the second recessed portion; a plurality of first through holes extending axially are arranged at intervals along the circumferential direction on the outer protective sleeve, and the support column is matched and penetrated in the first through hole.

[0008] As a further improvement of the present invention, a plurality of outer protective sleeves are axially arranged on the outer periphery of the inner protective sleeve, and a buffer pad is arranged between two adjacent outer protective sleeves, the buffer pad is an annular structure, a second through hole is arranged on the buffer pad corresponding to the first through hole, and the support column passes through the first through hole and the second through hole in sequence.

[0009] As a further improvement of the present invention, both the first recessed portion and the second recessed portion are wedge-shaped grooves.

[0010] As a further improvement of the present invention, the first recessed portion, the first protruding portion, the second recessed portion and the second protruding portion are all arranged to extend continuously along the axial direction.

[0011] As a further improvement of the present invention, the end surfaces of the two outer protective sleeves arranged at both ends of the inner protective sleeve protrude from the end surfaces of the corresponding ends of the inner protective sleeve, and the end surface of the inner protective sleeve protrudes from the end surface of the module.

[0012] As a further improvement of the present invention, gaps are provided between the first protruding portion and the second recessed portion, between the second protruding portion and the first recessed portion, and between the inner protective sleeve and the module, and glue is poured into the gaps;

[0013] The inner protective sleeve has an opening at its end, and is integrally potted with glue at the opening.

[0014] As a further improvement of the present invention, epoxy resin is poured into the gap.

[0015] As a further improvement of the present invention, third recessed portions and third protruding portions extending in the axial direction are alternately arranged on the outer peripheral wall of the outer protective sleeve in the circumferential direction.

[0016] As a further improvement of the present invention, the third protrusion and the second protrusion are arranged opposite to each other inside and outside the outer protective sleeve, and the first through hole is arranged between the second protrusion and the third protrusion.

[0017] As a further improvement of the present invention, the support column is made of a high-strength alloy material; and / or,

[0018] The inner protective sleeve is made of high-strength alloy material; and / or,

[0019] The outer protective sleeve is made of beryllium bronze; and / or,

[0020] The material of the buffer pad is rubber material.

[0021] The above-mentioned improved technical features can be combined with each other as long as they do not conflict with each other.

[0022] In general, compared with the prior art, the above technical solution conceived by the present invention has the following beneficial effects:

[0023] (1) The buffer protection device of the present invention provides a hollow cavity for placing the module in the inner protective sleeve, and provides a first recessed portion and a first protruding portion on the outer peripheral wall of the inner protective sleeve, and provides a second protruding portion and a second recessed portion matched with the outer protective sleeve, so that the outer protective sleeve is matched and nested on the inner protective sleeve, and when subjected to radial overload, radial force transmission is decomposed by mutual matching of the recessed portion and the protruding portion, thereby reducing the radial force impact inside the inner protective sleeve; by arranging support columns in the outer protective sleeve along annular intervals, axial support is provided for the device, and restoring elastic force is provided for the outer protective sleeve; by arranging the inner protective sleeve, the outer protective sleeve and the support columns, radial and axial overload impact resistance is achieved, and the protection of the internal module by the device is achieved; and by arranging the outer protective sleeve, the inner protective sleeve, the support columns and the module are all separated from each other, thereby greatly reducing the vibration superposition phenomenon during the buffer protection process.

[0024] (2) The buffer protection device of the present invention is provided with a plurality of outer protective sleeves axially on the outer periphery of the inner protective sleeve, and a buffer pad is provided between two adjacent outer protective sleeves. At the same time, the end faces of the outer protective sleeves at both ends protrude from the end face of the inner protective sleeve, so that when subjected to axial overload impact, the support column and the outer protective sleeve are impacted first, thereby preventing the inner protective sleeve from being directly subjected to the axial overload force, thereby further protecting the module.

[0025] (3) The buffer protection device in the present invention has a simple structure, is easy to manufacture, has low cost, and has good resistance to radial and axial overload impacts. It can greatly reduce the phenomenon of superposition of shocks during the buffer protection process, and has good application prospects and promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 1 is a schematic diagram of the overall assembly structure of the buffer protection device in an embodiment of the present invention;

[0028] Figure 2 is a side view of a buffer protection device in an embodiment of the present invention;

[0029] Figure 3 It is a schematic diagram of the structure of the inner and outer protective sleeves in an embodiment of the present invention;

[0030] Figure 4 is a schematic structural diagram of an inner protective sleeve in an embodiment of the present invention;

[0031] In all the drawings, the same figure marks represent the same technical features, specifically: 1. inner protective sleeve; 101. first recessed portion; 102. first protruding portion; 2. outer protective sleeve; 201. second recessed portion; 202. second protruding portion; 203. third recessed portion; 204. third protruding portion; 205. first through hole; 3. buffer pad; 4. support column; 5. module. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0033] In the description of the present invention, it should be understood that, unless otherwise expressly specified and limited, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships are 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 limiting the present invention.

[0034] In addition, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically limited.

[0035] 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 a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0037] Example:

[0038] See also Figure 1 to Figure 4 The buffer protection device in the preferred embodiment of the present invention includes an inner protective sleeve 1, an outer protective sleeve 2 and a support column 4, forming an axial and radial impact-resistant structure to protect the module 5 placed in the inner protective sleeve 1.

[0039] Specifically, Figure 4 As shown in the figure, the material of the inner protective sleeve 1 in the preferred embodiment is high-strength alloy steel material, which is a cylindrical structure with a hollow interior, and is used to place the module 5, and the module 5 is buffered and protected by the inner protective sleeve 1; at the same time, the first recessed portion 101 and the first protruding portion 102 extending axially are alternately and evenly arranged on the outer peripheral wall of the inner protective sleeve 1 in the circumferential direction.

[0040] More specifically, at least one end of the inner protective sleeve 1 is open so that the module 5 can be placed in the inner protective sleeve 1; of course, the inner protective sleeve 1 can also be cut into two parts and assembled after the module 5 is placed in. Preferably, when the module 5 is placed in the inner protective sleeve 1, there is a gap of about 1 mm between the module 5 and the inner protective sleeve 1, and epoxy resin is poured in the gap; at the same time, the open end surface of the inner protective sleeve 1 protrudes from the end of the module 5, and epoxy resin is poured as a whole at the opening.

[0041] Furthermore, if Figure 3 As shown in the figure, the outer protective sleeve 2 in the preferred embodiment is made of beryllium bronze material, which is a circular ring structure and is sleeved on the inner protective sleeve 1. At the same time, the second recessed portion 201 and the second protruding portion 202 extending in the axial direction are alternately and evenly arranged on the inner circumferential wall of the outer protective sleeve 2 in sequence along the circumferential direction, and the second protruding portion 202 is embedded in the first recessed portion 101, and the first protruding portion 102 is embedded in the second recessed portion 201, so as to realize the mutual nesting between the inner protective sleeve 1 and the outer protective sleeve 2, so as to further provide buffer protection for the inner protective sleeve 1 through the outer protective sleeve 2.

[0042] At the same time, a plurality of first through holes 205 extending axially are arranged at annular intervals on the outer protective sleeve 2, and the support column 4 is matched and penetrated in the first through hole 205, so that the support column 4 can provide axial support for the outer protective sleeve 2 and provide restoring elastic force for the outer protective sleeve 2 when the outer protective sleeve 2 is deformed by lateral extrusion.

[0043] Preferably, the support column 4 is made of high-strength alloy steel to provide strength support for the overall structure under small overload conditions, and when the outer protective sleeve 2 reaches a deformation above the yield strength and cannot be restored under large overload conditions, the support column 4 provides elastic force for the outer protective sleeve 2 to restore the deformation.

[0044] Preferably, if Figure 2 As shown in FIG. 1 , there are gaps between the second protruding portion 202 and the first recessed portion 101 , and between the first protruding portion 102 and the second recessed portion 201 , and epoxy resin is poured into the gaps.

[0045] In actual setting, an outer protective sleeve 2 can be set on the outer periphery of the inner protective sleeve 1, and the end faces of both ends of the outer protective sleeve 2 protrude from the corresponding end faces of the inner protective sleeve 1; of course, multiple outer protective sleeves 2 can also be set in sequence along the axial direction on the outer periphery of the inner protective sleeve 1, and the outer end faces of the two outer protective sleeves 2 located at both ends of the inner protective sleeve 1 protrude from the end faces of the inner protective sleeve 1 at the corresponding ends, so that when the device is subjected to axial overload, the inner protective sleeve 1 will not be impacted first.

[0046] Preferably, when a plurality of outer protective sleeves 2 are disposed outside the inner protective sleeve 1, a rubber cushion 3 is disposed between two adjacent outer protective sleeves 2, such as Figure 1 As shown in the figure, the buffer pad 3 is an annular structure made of rubber material, and a second through hole is arranged on the buffer pad 3 along the annular direction corresponding to the first through hole 205, so that the support column 4 can pass through the first through hole 205 and the second through hole in sequence, so that when the device is subjected to axial overload, the buffer pad 3 can perform compression and buffering for the outer protective sleeve 2.

[0047] Preferably, the first recessed portion 101 and the second recessed portion 201 are both wedge-shaped grooves, and the first protruding portion 102 and the second protruding portion 202 are also matched to be wedge-shaped, so that when subjected to radial overload, when the outer protective sleeve 2 transmits force to the inner protective sleeve 1, the radial force can be decomposed to both sides of the wedge-shaped groove through the wedge-shaped matching relationship, effectively preventing the module 5 inside the inner protective sleeve 1 from being subjected to direct radial impact.

[0048] Preferably, third recessed portions 203 and third protruding portions 204 extending along the axial direction are alternately and evenly arranged on the outer circumferential wall of the outer protective sleeve 2 in sequence, and further preferably, the second protruding portion 202 and the third protruding portion 204, the second recessed portion 201 and the third recessed portion 203 are arranged opposite to each other inside and outside the outer protective sleeve 2, and the first through hole 205 is arranged between the second protruding portion 202 and the third protruding portion 204.

[0049] It is understandable that when subjected to axial overload, the support column 4 is first subjected to pressure. When the support column 4 is bent under pressure, the outer protective sleeve 2 is squeezed, compressing the buffer pad 3. When the end face of the outer protective sleeve 2 is compressed to be flush with the end face of the inner protective sleeve 1, the inner protective sleeve 1 is squeezed, and the end face of the inner protective sleeve 1 is squeezed and deformed by the sealing glue, further protecting the module 5. When the axial overload is small, the squeezed support column 4 recovers, the outer protective sleeve 2 releases the squeeze on the buffer pad 3, and the entire device returns to its original state, ready to meet the next overload impact. In this process, since the outer protective sleeves 2, buffer pads 3, and support columns 4 are separated from the module 5, their deformation will not affect the module 5, so the superimposed impact of shock on the module 5 can be greatly reduced.

[0050] When subjected to radial overload, the outer protective sleeve 2 is radially squeezed and deformed, and squeezes the inner protective sleeve 1 inward. In this process, the support column 4 will first be subjected to pressure and bend. Since the outer protective sleeve 2 and the inner protective sleeve 1 are in a wedge-shaped matching relationship, the radial force transmitted inward by the outer protective sleeve 2 will be decomposed to both sides along the wedge-shaped groove wall, changing the direction of the force and reducing the force, so that the force transmitted to the inside of the inner protective sleeve 1 is significantly weakened, which can effectively prevent the module 5 from being subjected to direct radial impact. When the radial overload is further transmitted to the inside of the inner protective sleeve 1, the potting glue between the inner protective sleeve 1 and the module 5 is squeezed and deformed, further protecting the module 5. When the radial overload disappears, the squeezed support column 4 first returns to its original state, and drives the outer protective sleeve 2 to release the squeezing of the inner protective sleeve 1, and the entire device returns to its original state, ready to meet the next overload impact.

[0051] When the radial extrusion overload is large, the outer protective sleeve 2 and the inner protective sleeve 1 are squeezed and meshed together. During this process, the support column 4 is completely deformed, which will generate resistance to external overload, which can greatly attenuate the radial overload. The outer protective sleeve 2 and the inner protective sleeve 1 are meshed with each other. When they are subjected to radial impact again, the overload transmission direction is decomposed by mutual meshing, and the energy is effectively dissipated by meshing. Since the outer protective sleeve 2, the inner protective sleeve 1 and the support column 4 are separated from the module 5, their deformation does not affect the module 5, so the superposition effect of shock on the module 5 can be greatly reduced.

[0052] The buffer protection device in the present invention has a simple structure, is easy to manufacture, has a low cost, has good resistance to radial and axial overload impacts, can greatly reduce the vibration superposition phenomenon during the buffer protection process, and has good application prospects and promotion value.

[0053] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A buffer protection device, characterized in that: It includes an inner protective sleeve, an outer protective sleeve and a support column; The inner protective sleeve is a cylindrical structure, which is hollow inside and is used to place the module; the outer peripheral wall of the inner protective sleeve is alternately provided with first recessed portions and first protruding portions in the circumferential direction; The outer protective sleeve is an annular structure and is sleeved on the inner protective sleeve; the second recessed portions and the second protruding portions are alternately arranged on the inner circumferential wall of the outer protective sleeve in sequence, and the second protruding portion is embedded in the first recessed portion, and the first protruding portion is embedded in the second recessed portion; a plurality of first through holes extending axially are arranged at intervals along the circumferential direction on the outer protective sleeve, and the support column is matched and penetrated in the first through hole.

2. The buffer protection device according to claim 1, characterized in that: A plurality of outer protective sleeves are axially arranged on the outer periphery of the inner protective sleeve, and a buffer pad is arranged between two adjacent outer protective sleeves. The buffer pad is an annular structure, and a second through hole is arranged on the buffer pad corresponding to the first through hole. The support column passes through the first through hole and the second through hole in sequence.

3. The buffer protection device according to claim 1, characterized in that: The first recessed portion and the second recessed portion are both wedge-shaped grooves.

4. The buffer protection device according to claim 3, characterized in that: The first recessed portion, the first protruding portion, the second recessed portion and the second protruding portion are all continuously extended along the axial direction.

5. The buffer protection device according to claim 2, characterized in that: The end surfaces of the two outer protective sleeves arranged at the two ends of the inner protective sleeve protrude from the end surfaces of the corresponding ends of the inner protective sleeve, and the end surface of the inner protective sleeve protrudes from the end surface of the module.

6. The buffer protection device according to any one of claims 1 to 5, characterized in that: Gaps are provided between the first protruding portion and the second recessed portion, between the second protruding portion and the first recessed portion, and between the inner protective sleeve and the module, and glue is poured into the gaps; The inner protective sleeve has an opening at its end, and is integrally potted with glue at the opening.

7. The buffer protection device according to claim 6, characterized in that: The gap is filled with epoxy resin.

8. The buffer protection device according to claim 1, characterized in that: The outer peripheral wall of the outer protective sleeve is provided with third recessed portions and third protruding portions extending in the axial direction in alternating order in the circumferential direction.

9. The buffer protection device according to claim 8, characterized in that: The third protrusion and the second protrusion are arranged opposite to each other inside and outside the outer protective sleeve, and the first through hole is arranged between the second protrusion and the third protrusion.

10. The buffer protection device according to claim 2, characterized in that: The support column is made of high-strength alloy material; and / or, The inner protective sleeve is made of high-strength alloy material; and / or, The outer protective sleeve is made of beryllium bronze; and / or, The material of the buffer pad is rubber material.

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