Mechanical delay linear motion structure for fuze and use method

Abstract

The invention discloses a mechanical delay linear motion structure for fuze and a using method. The mechanical delay linear motion structure comprises a linear motion assembly, a safety structure and a damping medium. The linear motion assembly comprises a cylinder body, a piston and an energy storage element; the piston divides the interior of the cylinder body into an upper cavity and a lower cavity in the vertical direction, and the upper portion of the piston extends out of the cylinder body. The energy storage element is arranged in the upper cavity; a damping medium is arranged in the lower cavity, a drainage channel is arranged on the lower portion of the cylinder body, and a quick-release sealing piece is arranged at the drainage channel. According to the scheme provided by the invention, one-way delay linear motion can be realized, the motion is accurate, the time is controllable, and the safety and reliability of a fuze system can be improved; as an independent functional structure module, the operation is convenient, the structure is simple, and the manufacturing cost is low; the fuse delay releasing device can be used as a manual delay releasing device of a fuse, can realize delay within a certain time range after releasing the fuse, and provides a trigger signal for a fuse mounting structure.

Description

Technical Field

[0001] The invention relates to the technical field of fuzes, and in particular to a mechanical delayed linear motion structure for fuzes and a use method thereof. Background Art

[0002] Fuze is a vital component of the ammunition system. It can improve the lethality and accuracy of ammunition and is known as the "brain" and "eye" of ammunition. At the same time, as one of the important military technologies, fuze is not only related to combat effectiveness, but also affects the safety of combatants. Therefore, a fuze device with high safety and high reliability is of great significance to military strikes and the safety of combatants.

[0003] GJB 373B-2019 "Fuze Safety Design Guidelines" mentions in the redundant safety devices of the fuze safety system that the fuze safety device should have at least two independent safety devices, each of which can prevent the fuze from accidentally releasing the isolation. Therefore, each set of safety structures is required to be independent of each other and no common cause can occur. At the same time, the control and action of the safety device must be functionally separated from other processes in the ammunition system, and the release of each independent safety device requires stimulation from different environments or environmental combinations to release the insurance. Therefore, in manually deployed weapons, at least two different environments or environmental combinations are required to stimulate the release of the insurance. In addition, when the available launch environment is insufficient, the use of a manual release safety device is allowed, but the manual release of the fuze system is not allowed. Therefore, it is of great significance to design an independent, safe and reliable manual release safety device. Summary of the invention

[0004] The object of the present invention is to provide a mechanical delayed linear motion structure for a fuse and a method of using the structure to solve the problems existing in the prior art.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the present invention provides a mechanical delayed linear motion structure for a fuze, including a linear motion component, a safety structure, and a damping medium; the linear motion component includes a cylinder body, a piston, and an energy storage element; the piston divides the inner part of the cylinder body into an upper cavity and a lower cavity in the vertical direction, and the upper part of the piston extends out of the cylinder body; the energy storage element is arranged in the upper cavity; a damping medium is arranged inside the lower cavity, a leakage channel is arranged at the lower part of the cylinder body, the leakage channel is connected to the lower cavity, and a quick-release seal is arranged at the leakage channel; the safety structure includes a limit pin; the limit pin is removably installed in the middle of the area where the piston extends out of the cylinder body.

[0006] Furthermore, the linear motion structure also includes a damping structure; the damping structure is arranged at the leakage channel.

[0007] Furthermore, the damping medium is any one of a liquid fluid and solid particles with fluid properties; the liquid fluid damping medium includes but is not limited to any one of water, alcohol, grease, organic oil, and antifreeze; the solid particles with fluid properties include but are not limited to any one of stainless steel beads, glass beads, quartz sand, and corundum.

[0008] Furthermore, the linear motion assembly also includes an upper end cover and a lower end cover; the piston includes a piston part and a piston rod, the piston part is disc-shaped, and the center of the top is connected to the piston rod. The piston part divides the inner part of the cylinder body into an upper cavity and a lower cavity in the vertical direction, and the top of the cylinder body is connected to the upper end cover. A through hole is provided on the top of the upper end cover, and the upper end of the piston rod extends out of the through hole; a lower end cover is provided at the bottom of the cylinder body, which is connected by a threaded structure, and a leakage hole is provided at the corresponding position of the leakage channel, and a quick-release seal is provided at the leakage hole; the quick-release seal includes a head and a plunger part, and the plunger part is cylindrical and is made of soft elastic material, which is inserted into the leakage channel and / or the leakage hole of the lower end cover.

[0009] Furthermore, a through hole is provided in the upper middle portion of the piston rod, and after the piston rod extends out of the through hole at the top of the upper end cover, the limit pin of the safety structure can be removed and inserted into the through hole.

[0010] Furthermore, the damping structure is a disc-shaped sheet; the damping structure is provided with a pore channel.

[0011] Furthermore, the damping medium is a liquid fluid, and the damping structure includes a base and an upper seat; the base includes a mounting chassis, a lower outer ring, a lower inner ring, a plurality of plungers, and a positioning groove; the mounting chassis is disc-shaped, and a lower outer ring and a lower inner ring are arranged on its upper surface, wherein the lower inner ring is located inside the lower outer ring, and a plurality of plungers distributed in an array are arranged on the inner side of the lower outer ring, and a positioning groove is arranged on the mounting chassis outside the lower outer ring; a lower through hole is arranged on the mounting chassis inside the lower inner ring; the upper seat includes a chassis, an upper outer ring, an upper inner ring, an upper top plate, and a plurality of upper through holes; the chassis is centrally provided with an opening The disc-shaped structure has an opening inner diameter that is the same as the outer diameter of the lower outer ring, and an upper outer ring and an upper inner ring are arranged at the opening, wherein the upper inner ring is located inside the upper outer ring, and an upper top plate is arranged on the upper parts of the upper outer ring and the upper inner ring, and a plurality of upper through holes distributed in an array are arranged on the upper top plate between the upper outer ring and the upper inner ring; the upper outer ring is sleeved on the outside of the lower outer ring, and the chassis is placed in the positioning groove, and in the projection of the horizontal plane, the area of ​​the plunger is greater than or equal to the area of ​​the upper through hole; the upper inner ring is located between the lower outer ring and the lower inner ring, and the three chambers between the lower outer ring and the upper inner ring, between the upper inner ring and the lower inner ring, and inside the lower inner ring are connected.

[0012] Furthermore, the height of the lower outer ring is equal to the distance from the top surface of the chassis to the bottom surface of the upper top plate, the height of the upper inner ring and the height of the lower inner ring are smaller than the distance from the top surface of the chassis to the bottom surface of the upper top plate, or the height of the upper inner ring and the height of the lower inner ring are equal to the distance from the top surface of the chassis to the bottom surface of the upper top plate, and a plurality of upper inner ring notches and lower inner ring notches are provided at the lower end of the upper inner ring and the upper end of the lower inner ring.

[0013] Furthermore, the lower outer ring and the lower inner ring are coaxial, and the upper inner ring is not coaxial with the lower outer ring and the lower inner ring.

[0014] The present invention also discloses a method for using a mechanical delayed linear motion structure for a fuze. The method for using the mechanical delayed linear motion structure includes the following steps: S1, structural installation, filling the damping medium into the lower cavity, installing the safety structure on the piston, installing the quick-insert seal in place, and installing the mechanical delayed linear motion structure to the fuze body; S2, after receiving the preparatory work signal command, quickly remove the quick-release seal and wait for the safety release signal command; S3, after receiving the safety release signal, immediately pull out the limit pin to release the safety structure; S4, after releasing the safety structure, the piston moves linearly downward under the action of the energy storage element, and the damping medium gradually flows out to achieve a delay effect. When the delay reaches the predetermined time, the piston moves to the predetermined position, and the externally connected safety mechanism starts to work.

[0015] The mechanical delayed linear motion structure for the fuze proposed in the present invention has the following beneficial effects compared with the prior art: the scheme can realize unidirectional delayed linear motion with accurate motion and controllable time, which is beneficial to improving the safety and reliability of the fuze system; as an independent functional structural module, it is easy to operate, simple in structure and low in manufacturing cost; it can be used as a manual release delay safety device for the fuze, and after the safety is released, it can realize a delay within a certain time range, providing a trigger signal for the fuze safety structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional cross-sectional view of a mechanical delayed linear motion structure of a fuse in a safety state according to the present invention.

[0017] Figure 2 It is a cross-sectional view of a mechanical delayed linear motion structure in a safety state according to an embodiment of the present invention.

[0018] Figure 3 It is a partial enlarged cross-sectional view of the bottom sealing area of ​​the present invention.

[0019] Figure 4 It is a top view of a mechanical delayed linear motion structure in a safety state according to an embodiment of the present invention.

[0020] Figure 5It is a schematic diagram of the connection between a mechanical delayed linear motion structure and an actuator structure according to an embodiment of the present invention.

[0021] Figure 6 It is a schematic diagram of an explosion of a damping structure according to another embodiment of the present invention.

[0022] Figure 7 It is a partial three-dimensional cross-sectional schematic diagram of a damping structure of another embodiment of the present invention Figure 8 It is a cross-sectional schematic diagram of a damping structure according to another embodiment of the present invention.

[0023] Fig. 9 It is a schematic diagram of the installation position of the damping structure of another embodiment of the present invention.

[0024] Fig.10 It is a cross-sectional schematic diagram of a damping structure according to another embodiment of the present invention.

[0025] Fig.11 Schematic diagram of partial cross-section of the damping structure of two embodiments of the present invention.

[0026] 1-linear motion structure, 2-safety structure, 3-damping structure, 11-cylinder body, 111-upper cavity, 112-lower cavity, 12-piston, 121-piston seal, 13-energy storage element, 14-upper end cover, 15-lower end cover, 21-pull ring, 22-limit pin, 151-bottom seal, 152-quick release seal, 30-sealing pad, 31-base, 32-upper seat, 33-safety film, 34-membrane rupture cone, 4-safety structure, 41-rotor, 5-fuze body DETAILED DESCRIPTION The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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.

[0027] As attached Figure 1-5 As shown, a mechanical delayed linear motion structure for a fuse according to the present invention comprises: a linear motion component 1, a safety structure 2, a damping medium (not shown in the drawings), and a damping structure 3; Among them, the linear motion component 1 can perform a single delayed linear motion along a fixed direction. The linear motion component includes a cylinder body 11, a piston 12, a piston seal 121, an energy storage element 13, an upper end cover 14, a lower end cover 15, and a bottom seal 151; the piston 12 includes a piston part 120 and a piston rod 123. The piston part 120 is disc-shaped, and the center of the top is connected to the piston rod. A piston seal 121 is arranged on the outside of the piston part 120. The piston part 120 divides the interior of the cylinder body 11 into an upper cavity 111 and a lower cavity 112 in the vertical direction. The top of the cylinder body 11 is connected to the upper end cover 14. A through hole is arranged on the top of the upper end cover 14, and the upper end of the piston rod 123 extends out of the through hole.

[0028] The safety structure 2 includes a pull ring 21 and a limit pin 22; the limit pin 22 is removably installed in the middle of the area where the piston 12 extends out of the cylinder body, and is used to limit the movement of the piston 12; specifically, a through hole is provided in the upper and middle part of the piston rod 123, and the limit pin 22 is inserted into the through hole after the piston rod 123 extends out of the through hole at the top of the upper end cover 14, so as to limit the piston 12.

[0029] The energy storage element 13 is installed between the upper end cover 14 and the piston 12, and can provide a moving power source for the piston 12. In one embodiment of the present invention, the energy storage element 13 is a compression spring.

[0030] A damping medium (not shown in the drawings) is arranged inside the lower cavity 112 , a leakage channel 113 is arranged at the lower part of the cylinder body 11 , the leakage channel 113 is connected to the lower cavity 112 , and a quick-release seal 152 is arranged at the leakage channel 113 . When the quick-release seal 152 is pulled out, the damping medium can flow out through the leakage channel 113 .

[0031] The damping medium includes any one of the substances in the existing industrial technology, but is not limited to liquid fluids and solid particles with fluid properties. Among them, the liquid fluid damping medium includes: water, alcohol, grease, organic oil, antifreeze, etc., any one selected according to the actual industrial application occasions. Among them, the solid particle damping medium with fluid properties includes: stainless steel beads, glass beads, quartz sand, corundum, etc., any one selected according to the actual industrial application occasions.

[0032] Furthermore, in one embodiment of the present invention, a lower end cover 15 is provided at the bottom of the cylinder body 11, connected by a threaded structure, a leakage hole 154 is provided at a position corresponding to the leakage channel 113, and a quick-release seal 152 is provided at the leakage hole 154. A bottom seal 151 is provided at the connection between the lower end cover 15 and the cylinder body 11.

[0033] The bottom seal 151 and the piston seal 121 may be sealing rings or O-rings.

[0034] The quick-release seal 152 includes a head and a plunger. The plunger is cylindrical and made of soft elastic material. It is inserted into the leakage channel 113 and / or the leakage hole 154 of the lower end cover 15 to seal them.

[0035] The damping medium is placed inside the lower cavity 112 before operation; when the safety structure 2 is released, the piston 12 moves downward under the push of the energy storage element 13, and the damping medium can flow out through the bottom leakage channel 113 of the lower cavity 112. Figure 5 In the embodiment shown, the mechanical delayed linear motion structure of the present invention is installed inside the fuze body 5, and the tail of the piston 12 is connected to the safety structure 4 to limit the rotation of the rotor 41 in the safety structure, thereby realizing the first safety. When the safety structure is released, the piston rod moves downward, and after the delay reaches a predetermined time, the tail of the piston rod is separated from the safety structure, thereby realizing the first safety release.

[0036] Furthermore, in order to achieve controllability of the delay time, a damping structure 3 is provided at the discharge channel 113 to control the outflow of the damping medium and play a delay role.

[0037] In one embodiment of the present invention, the damping medium is a liquid fluid, specifically an industrial antifreeze solution at -45°C. In this embodiment, the damping structure 3 is a disc-shaped sheet.

[0038] Furthermore, a protrusion 153 is provided in the center of the lower end cover 15, a groove portion 114 is provided at a corresponding position at the bottom of the cylinder body 11, a discharge channel 113 is provided in the center of the groove portion 114, the protrusion 153 extends into the groove portion 114, and the damping structure 3 is provided in the groove portion 114. When the lower end cover 15 is tightened with the cylinder body 11, the protrusion 153 presses the damping structure 3 upward to fix it. In order to further improve the sealing performance, a sealing gasket 30 is provided between the damping structure 3 and the protrusion 153 of the lower end cover 15.

[0039] In one embodiment of the present invention, the damping structure 3 is provided with a pore channel, and the micropores are not limited to a single / array pore channel of a single size / multiple size combination, but the pore channel can limit the passage of the damping medium. The shape and number of the pore channel can be adaptively designed according to the delay requirements. In another embodiment of the present invention, in order to facilitate the observation of the outflow of the damping medium, a damping structure 3 with a single pore channel is adopted.

[0040] Since the tiny gap channel has certain challenges in processing, further, such as the attached Figure 6 , 7 As shown in FIGS. 8 and 9 , the present invention further provides a damping structure 3 , which includes a base 31 , an upper seat 32 , a safety membrane 33 , and a membrane breaking cone 34 .

[0041] The base 31 includes a mounting chassis 311, a lower outer ring 312, a lower inner ring 313, a plurality of plungers 314, and a positioning groove 315. The mounting chassis 311 is disc-shaped, and its outer diameter is the same as the inner diameter of the groove portion 114 at the bottom of the cylinder body 11. The lower outer ring 312 and the lower inner ring 313 are arranged on its upper surface, wherein the lower inner ring 313 is located inside the lower outer ring 312, and a plurality of plungers 314 are arranged in an array inside the lower outer ring 312. A positioning groove is arranged on the mounting chassis 311 outside the lower outer ring 312. A lower through hole 316 is arranged on the mounting chassis 311 inside the lower inner ring 313.

[0042] The upper seat 32 includes a bottom plate 321, an upper outer ring 322, an upper inner ring 323, an upper top plate 324, and a plurality of upper through holes 325. The bottom plate 321 is a disc-shaped structure with an opening in the center, the inner diameter of the opening is the same as the outer diameter of the lower outer ring 312, the upper outer ring 322 and the upper inner ring 323 are arranged at the opening, wherein the upper inner ring 323 is located inside the upper outer ring 322, an upper top plate 325 is arranged on the upper parts of the upper outer ring 322 and the upper inner ring 323, and a plurality of upper through holes 325 distributed in an array are arranged on the upper top plate 325 between the upper outer ring 322 and the upper inner ring 323.

[0043] The upper outer ring 322 is rotatably sleeved on the outer side of the lower outer ring 312, and the chassis 321 is placed in the positioning groove 315. The size of the positioning groove matches the chassis 321. In the horizontal plane projection, the area of ​​the plunger 314 is greater than or equal to the area of ​​the upper through hole 325, and the upper through hole 325 can partially or completely overlap with the horizontal plane projection of the plunger 314. By changing the angle between the upper outer ring 322 and the lower outer ring 312, the overlapping area of ​​the upper through hole 325 and the plunger 314 can be adjusted. Furthermore, a protruding indicator b1 is provided on the chassis 321, and a plurality of indicator grooves b2 are provided at the corresponding position of the positioning groove 315 to correspond to the angle between the upper outer ring 322 and the lower outer ring 312.

[0044] The upper inner ring 323 is located between the lower outer ring 312 and the lower inner ring 313, and the three chambers between the lower outer ring 312 and the upper inner ring 323, between the upper inner ring 323 and the lower inner ring 313, and inside the lower inner ring 313 are connected. The height of the lower outer ring 312 is equal to the distance from the top surface of the chassis 321 to the bottom surface of the upper top plate 324, and the height of the upper inner ring 323 and the height of the lower inner ring 313 are less than the distance from the top surface of the chassis 321 to the bottom surface of the upper top plate 324. Therefore, the upper inner ring 323 and the lower inner ring 313 connect the three chambers inside the lower outer ring 312, which can provide more resistance to the outflow of the damping medium.

[0045] Furthermore, as attached Fig.10As shown, the height of the upper inner ring 323 and the height of the lower inner ring 313 are equal to the distance from the top surface of the chassis 321 to the bottom surface of the upper top plate 324. At the same time, a plurality of upper inner ring notches 323q and lower inner ring notches 313q are provided at the lower end of the upper inner ring 323 and the upper end of the lower inner ring 313. The upper inner ring notches 323q and the lower inner ring notches 313q are used to connect the three chambers between the upper inner ring 323, the lower inner ring 313 and the lower outer ring 312. At the same time, it can play a certain supporting role on the upper top plate 324.

[0046] Furthermore, the lower outer ring 312, the lower inner ring 313, and the upper inner ring 323 are coaxial. Fig.11 Left figure, can also be different axis. When different axis, such as attached Fig.11 In the right figure, the lower outer ring 312 and the lower inner ring 313 are coaxial, and the upper inner ring 323 is not coaxial with the above two structures. With this design, the size of the chamber between the lower outer ring 312 and the upper inner ring 323, and between the upper inner ring 323 and the lower inner ring 313 (the distance between the two ring walls) will change, which will increase the turbulence of the damping medium when flowing between them and increase the damping effect.

[0047] Furthermore, in order to improve the flexibility of adjusting the delay time (damping medium outflow), a breaking hole 3241 is provided in the upper top plate 324 in the inner area of ​​the upper inner ring 323, and a film-breaking cone 34 is provided at the lower part of the piston part 120 corresponding to the breaking hole 3241. The film-breaking cone 34 can pierce the breaking hole 3241 after the piston moves to a preset distance, thereby increasing the flow rate of the damping medium and reducing the delay time. The delay time can be further adjusted by adjusting the length of the film-breaking cone 34. Furthermore, the breaking hole 3241 is a structure with a preset rupture indentation, or the breaking hole 3241 is a through hole, and the breaking hole 3241 is covered with a safety film 33. The lower part of the film-breaking cone 34 is a cavity structure, and a through hole is provided on the side. After piercing the safety film 33, a passage can be formed through the through hole and the cavity structure to avoid blockage of the safety film 33.

[0048] The present invention also provides a method for using the mechanical delayed linear motion structure for a fuse, which is implemented by the mechanical delayed linear motion structure for a fuse provided above, and the method for using comprises the following steps: S1, structural installation, filling the damping medium into the lower cavity 112, installing the safety structure 2 on the piston 12, installing the quick-insert seal 152 on the bottom of the lower end cover 15, and installing the mechanical delayed linear motion structure to the fuze body; S2. After receiving the preparatory work signal command, quickly remove the quick-release seal 152 and wait for the release signal command; S3, upon receiving the safety release signal, immediately pull the pull ring 21 to release the safety structure 2; S4. After the safety structure 2 is released, the piston 12 moves linearly downward under the action of the energy storage element 13. Since the damping medium slowly flows out through the pore channel of the damping structure 3, a delay effect is achieved. When the delay reaches the predetermined time, the piston 12 moves to the predetermined position, and the externally connected safety mechanism starts to work.

[0049] It should be noted that, unless otherwise clearly specified and limited, the terms such as "install", "connect", "connect", "fix", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A mechanical delayed linear motion structure for a fuse, characterized in that: It includes a linear motion component, a safety structure, and a damping medium; the linear motion component includes a cylinder body, a piston, and an energy storage element; the piston vertically divides the inner part of the cylinder body into an upper cavity and a lower cavity, and the upper part of the piston extends out of the cylinder body; the energy storage element is arranged in the upper cavity; the damping medium is arranged inside the lower cavity, a leakage channel is arranged at the lower part of the cylinder body, the leakage channel is connected with the lower cavity, and a quick-release seal is arranged at the leakage channel; the safety structure includes a limit pin; the limit pin is removably installed in the middle of the area where the piston extends out of the cylinder body.

2. The mechanical delayed linear motion structure according to claim 1, characterized in that: The linear motion structure further includes a damping structure; the damping structure is arranged at the leakage channel.

3. The mechanical delayed linear motion structure according to any one of claims 1 or 2, characterized in that: The damping medium is any one of a liquid fluid and solid particles with fluid properties; the liquid fluid damping medium includes but is not limited to any one of water, alcohol, grease, organic oil, and antifreeze; the solid particles with fluid properties include but are not limited to any one of stainless steel beads, glass beads, quartz sand, and corundum.

4. The mechanical delayed linear motion structure according to claim 1, characterized in that: The linear motion assembly also includes an upper end cover and a lower end cover; the piston includes a piston part and a piston rod, the piston part is disc-shaped, and the center of the top is connected to the piston rod. The piston part divides the inner part of the cylinder body into an upper cavity and a lower cavity in the vertical direction, and the top of the cylinder body is connected to the upper end cover. A through hole is provided on the top of the upper end cover, and the upper end of the piston rod extends out of the through hole; a lower end cover is provided at the bottom of the cylinder body, which is connected by a threaded structure, and a leakage hole is provided at the corresponding position of the leakage channel, and a quick-release seal is provided at the leakage hole; the quick-release seal includes a head and a plunger part, and the plunger part is cylindrical and made of soft elastic material, which is inserted into the leakage channel and / or the leakage hole of the lower end cover.

5. The mechanical delayed linear motion structure according to claim 1, characterized in that: A through hole is provided in the middle and upper part of the piston rod, and after the piston rod extends out of the through hole at the top of the upper end cover, the limit pin of the safety structure can be removed and inserted into the through hole.

6. The mechanical delayed linear motion structure according to claim 3, characterized in that: The damping structure is a disc-shaped sheet; the damping structure is provided with a pore channel.

7. The mechanical delayed linear motion structure according to claim 2, characterized in that: The damping medium is a liquid fluid, and the damping structure includes a base and an upper seat; the base includes a mounting chassis, a lower outer ring, a lower inner ring, a plurality of plungers, and a positioning groove; the mounting chassis is disc-shaped, and a lower outer ring and a lower inner ring are arranged on its upper surface, wherein the lower inner ring is located inside the lower outer ring, and a plurality of plungers distributed in an array are arranged on the inner side of the lower outer ring, and a positioning groove is arranged on the mounting chassis outside the lower outer ring; a lower through hole is arranged on the mounting chassis inside the lower inner ring; the upper seat includes a chassis, an upper outer ring, an upper inner ring, an upper top plate, and a plurality of upper through holes; the chassis is a disk with an opening arranged in the center The structure has an opening inner diameter which is the same as the outer diameter of the lower outer ring, an upper outer ring and an upper inner ring are arranged at the opening, wherein the upper inner ring is located inside the upper outer ring, an upper top plate is arranged on the upper parts of the upper outer ring and the upper inner ring, and a plurality of upper through holes distributed in an array are arranged on the upper top plate between the upper outer ring and the upper inner ring; the upper outer ring is sleeved on the outside of the lower outer ring, the chassis is placed in the positioning groove, and in the projection on the horizontal plane, the area of ​​the plunger is greater than or equal to the area of ​​the upper through hole; the upper inner ring is located between the lower outer ring and the lower inner ring, and the three chambers between the lower outer ring and the upper inner ring, between the upper inner ring and the lower inner ring, and inside the lower inner ring are connected.

8. The mechanical delayed linear motion structure according to claim 7, characterized in that: The height of the lower outer ring is equal to the distance from the top surface of the chassis to the bottom surface of the upper top plate, the height of the upper inner ring and the height of the lower inner ring are less than the distance from the top surface of the chassis to the bottom surface of the upper top plate, or the height of the upper inner ring and the height of the lower inner ring are equal to the distance from the top surface of the chassis to the bottom surface of the upper top plate, and at the same time, a plurality of upper inner ring notches and lower inner ring notches are provided at the lower end of the upper inner ring and the upper end of the lower inner ring.

9. The mechanical delayed linear motion structure according to claim 7, characterized in that: The lower outer ring and the lower inner ring are coaxial, and the upper inner ring is not coaxial with the lower outer ring and the lower inner ring.

10. A method for using a mechanical delayed linear motion structure for a fuze, characterized in that: The mechanical delayed linear motion structure as described in any one of claims 1 to 9 is adopted, and its use method includes the following steps: S1, structural installation, filling the damping medium into the lower cavity, installing the safety structure on the piston, and installing the quick-insert seal in place, and installing the mechanical delayed linear motion structure to the fuze body; S2, after receiving the preparatory work signal instruction, quickly remove the quick-release seal and wait for the safety release signal instruction; S3, after receiving the safety release signal, immediately pull out the limit pin to release the safety structure; S4, after releasing the safety structure, the piston moves linearly downward under the action of the energy storage element, and the damping medium gradually flows out to achieve a delay effect. When the delay reaches the predetermined time, the piston moves to the predetermined position, and the externally connected safety mechanism starts to work.

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