A separate firing piston

Abstract

The present invention discloses a split-type launching piston, comprising a left piston plate and a right piston plate which are relatively movable and matched, and a guide spring which is arranged between the left piston plate and the right piston plate; a guide buckle is slidably arranged on the left piston plate, and an end of the guide buckle close to the right piston plate is clamped with the right piston plate, and the guide buckle moves with the right piston plate relative to the left piston plate to a first position or a second position; a guide pull rod is arranged on an end of the guide buckle close to the left piston plate, and the end of the guide pull rod is self-locked by clamping with the guide buckle in a first position, and the end of the guide pull rod is disengaged from the guide buckle and unlocked in a second position; the present invention adopts a split-matching piston structure, so that the split piston can effectively self-lock in a non-working state outside the launching tube, and automatically unlock and closely contact the tube wall in a working state inside the launching tube, thereby ensuring the air tightness between the piston and the tube wall, and at the same time avoiding the situation where the piston falls back quickly and damages the launching tube after ejection.

Description

Technical Field

[0001] The invention belongs to the technical field of unmanned aerial vehicle launching pistons, and in particular relates to a detachable launching piston. Background Art

[0002] The existing UAV gas catapult is achieved by installing an integrated piston structure inside a launch tube, filling the launch tube with high-pressure gas, and using the gas pressure to push the integrated piston structure to move at high speed in the launch tube to eject the UAV connected to the piston.

[0003] During the ejection process, the edge of the existing one-piece piston will frequently rub against the wall of the launch tube. After long-term use, the edge of the piston will be severely worn, resulting in insufficient contact between the piston and the wall, which in turn reduces the sealing between the piston and the wall, causing high-pressure gas leakage and affecting the ejection effect. At the same time, after the edge of the existing one-piece piston is worn, the diameter of the piston is actually smaller than the diameter of the launch tube, which causes the piston to fall back after ejection. In particular, when the launch direction is vertically upward, the worn one-piece piston will quickly fall back and collide with the inside of the launch tube, which can easily cause damage to the launch tube and the piston, greatly affecting the service life of the overall launch equipment, and at the same time burying a major safety hazard for the normal launch of the drone.

[0004] Therefore, in order to solve the problem that the air tightness between the traditional integrated piston and the cylinder wall of the launch cylinder is reduced after long-term use and wear, and the worn piston is easy to fall back after ejection, the present invention discloses a separate launch piston. Summary of the invention

[0005] The object of the present invention is to provide a split-type launching piston, which adopts a split-coordinated piston structure, so that the split-type piston can effectively self-lock in a non-working state outside the launching tube, and unlock itself and contact closely with the tube wall in a working state inside the launching tube, thereby ensuring the airtightness between the piston and the tube wall, and avoiding the situation where the piston falls back quickly after ejection and hits the launching tube.

[0006] The present invention is achieved through the following technical solutions:

[0007] A separate firing piston comprises a left piston plate, a right piston plate capable of moving relatively close to or away from the left piston plate, and a guide spring arranged between the left piston plate and the right piston plate; a guide buckle is slidably arranged on the left piston plate, an end of the guide buckle close to the right piston plate is engaged with the right piston plate, and the guide buckle moves to a first position or a second position relative to the left piston plate as the right piston plate moves; a guide pull rod is arranged on an end of the guide buckle close to the left piston plate, an end of the guide pull rod is engaged with the guide buckle for self-locking in a first position, and an end of the guide pull rod is disengaged from the guide buckle and unlocked in a second position.

[0008] When the left piston plate and the right piston plate are close to each other and assembled, they form an integral piston. When the right piston plate and the left piston plate move close to each other, the guide buckle accompanies the right piston plate to move toward the left piston plate, thereby making the guide buckle and the guide pull rod move close to each other until the guide buckle and the end of the guide pull rod move relative to each other to the first position. At this time, the end of the guide pull rod and the guide buckle are engaged with each other and self-locked, thereby fixing the relative position between the left piston plate and the right piston plate in a self-locking state in the absence of external force. The self-locking state refers to the state in which the left piston plate and the right piston plate are relatively still in the absence of external force, and can move close to each other but cannot move away from each other under the action of external force.

[0009] When it is necessary to unlock the left piston plate and the right piston plate, the left piston plate and the right piston plate are squeezed by external force, so that the left piston plate and the right piston plate move further closer to each other, and then the guide buckle and the guide pull rod move further closer to each other to the second position. At this time, the end of the guide pull rod is disengaged from the guide buckle and unlocked, so that the left piston plate and the right piston plate are in a non-self-locking state.

[0010] The left piston plate and the right piston plate are in a self-locking state before being installed inside the launch tube. After the left piston plate and the right piston plate are installed inside the launch tube, the left piston plate and the right piston plate move relative to each other under the restraining force of the inner wall of the launch tube, thereby causing the guide bayonet and the guide rod to move relative to the second position for unlocking. After being unlocked, the left piston plate and the right piston plate can move relative to each other. At this time, the guide spring located between the left piston plate and the right piston plate presses the left piston plate and the right piston plate toward the wall of the launch tube, respectively, so that the left piston plate and the right piston plate are relatively separated and contact the wall of the launch tube, thereby preventing the piston structure composed of the left piston plate and the right piston plate from directly falling back and colliding with the bottom of the launch tube during vertical ejection, further ensuring the safety and reliability of the launch tube and the piston structure.

[0011] In order to better realize the present invention, further, the left piston plate is provided with a guide groove, and the right piston plate is provided with a guide member extending into the inside of the guide groove and slidably connected with the guide groove; the guide member is provided with an installation groove, and a guide buckle is slidably installed in the installation groove; a protrusion is provided on the side wall of the installation groove, and the guide buckle is provided with a bayonet that is engaged with the protrusion at one end close to the right piston plate.

[0012] In order to better implement the present invention, further, a guide hole is provided on the guide member, one end of the guide spring is fixedly connected to the left piston plate, and the other end of the guide spring extends to the interior of the guide hole and is slidably connected to the guide hole.

[0013] In order to better realize the present invention, further, a guide groove is provided on the guide buckle, and the end of the guide pull rod extends to the interior of the guide groove and is slidably connected with the guide groove; a one-way bayonet opening toward the right piston plate is provided inside the guide groove, and the end of the guide pull rod is self-locked with the one-way bayonet in the first position, and the end of the guide pull rod is disengaged from the one-way bayonet and unlocked in the second position.

[0014] In order to better implement the present invention, further, a guide wedge protruding toward the one-way bayonet is provided on the opening side of the one-way bayonet, and the guide wedge includes a first guide surface and a second guide surface relatively arranged in a V-shape, and the first guide surface guides the end of the guide rod to the inside of the one-way bayonet for self-locking in the first position, and the second guide surface guides the end of the guide rod out of the one-way bayonet for disengagement and unlocking in the second position.

[0015] In order to better implement the present invention, further, a return spring is arranged between one end of the guide buckle close to the right piston plate and one side of the left piston plate close to the right piston plate, and the return spring is in a compressed state in both the first position and the second position.

[0016] In order to better implement the present invention, further, the inner bracket includes a left inner bracket and a right inner bracket, the left inner bracket is connected to the left piston plate, and the right inner bracket is connected to the right piston plate.

[0017] In order to better implement the present invention, further, a left sealing ring is arranged between the left inner bracket and the edge of the left piston plate, and a right sealing ring is arranged between the right inner bracket and the edge of the right piston plate.

[0018] In order to better implement the present invention, further, a piston left component is provided on the end surface of the left inner bracket away from the left sealing ring, and a piston right component is provided on the end surface of the right inner bracket away from the right sealing ring.

[0019] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0020] (1) The present invention provides a left piston plate and a right piston plate that are slidably connected to each other, and provides a compressed guide spring between the left piston plate and the right piston plate, so that when the left piston plate and the right piston plate are installed in the working state inside the launch tube, the elastic force of the guide spring ensures that the left piston plate and the right piston plate are respectively in close contact with the tube wall of the launch tube, and after the piston is worn, the elastic force compensation of the guide spring can also ensure that the left piston plate and the right piston plate are always in close contact with the tube wall, thereby ensuring the air tightness between the piston and the tube wall. At the same time, since the left piston plate and the right piston plate are always in close contact with the tube wall, the problem of the piston falling back after the ejection is completed is avoided, and the problem of the piston falling back and colliding with the launch tube is effectively solved;

[0021] (2) The present invention provides a guide buckle on the left piston plate, and provides a guide rod between the left piston plate and the left end of the guide buckle, and at the same time, the right end of the guide buckle is clamped with the right piston plate, so that the guide buckle can move with the right piston plate in the direction of approaching or moving away from the left piston plate; and when the right piston plate drives the guide buckle to move close to the left piston plate to the first position, the end of the guide rod of the guide buckle is clamped and locked, thereby locking the relative position between the left piston plate and the right piston plate, so that the left piston plate and the right piston plate can continue to move closer to each other but cannot continue to move away from each other, thereby ensuring the stability of the split piston in the non-working state outside the launch tube; when the left piston plate and the right piston plate are installed inside the launch tube, the left piston plate and the right piston plate continue to move closer to each other under the pressure of the tube wall, thereby driving the guide buckle to move to the second position and unlocking with the end of the guide rod, at this time, the left piston plate and the right piston plate can be in close contact with the tube wall under the elastic force of the guide spring, effectively ensuring the airtightness between the piston and the tube wall, and effectively preventing the piston from falling back after the launch is completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the matching structure of the left piston plate and the right piston plate;

[0023] Figure 2 A schematic diagram showing the guide rod and the guide buckle in an unlocked state;

[0024] Figure 3 for Figure 2 A local enlarged view of point A;

[0025] Figure 4 Schematic diagram of the guide rod and guide buckle in the locked state

[0026] Figure 5 for Figure 4 A partial enlarged view of point B;

[0027] Figure 6It is a schematic diagram of the overall structure of the separate firing piston;

[0028] Figure 7 Schematic diagram of the structure of the guide buckle.

[0029] Among them: 1-left piston plate; 2-right piston plate; 3-guide spring; 4-guide buckle; 5-guide pull rod; 6-guide groove; 7-guide member; 8-return spring; 91-left inner bracket; 92-right inner bracket; 101-piston left component; 102-piston right component; 100-one-way bayonet; 200-guide wedge; 001-first sub-slot; 002-second sub-slot. DETAILED DESCRIPTION

[0030] Embodiment 1:

[0031] A separate firing piston of this embodiment, such as Figure 1 As shown, it includes a left piston plate 1, a right piston plate 2 that can move relatively close to or away from the left piston plate 1, and a guide spring 3 arranged between the left piston plate 1 and the right piston plate 2; a guide buckle 4 is slidably arranged on the left piston plate 1, and the end of the guide buckle 4 close to the right piston plate 2 is engaged with the right piston plate 2, and the guide buckle 4 moves with the right piston plate 2 relative to the left piston plate 1 to the first position or the second position; a guide pull rod 5 is arranged on the end of the guide buckle 4 close to the left piston plate 1, and the end of the guide pull rod 5 is engaged with the guide buckle 4 in the first position for self-locking, and the end of the guide pull rod 5 is disengaged from the guide buckle 4 in the second position for unlocking.

[0032] The right end of the left piston plate 1 and the left end of the right piston plate 2 are both joint surfaces, and a guide spring 3 perpendicular to the joint surface is arranged between the left piston plate 1 and the right piston plate 2, and the guide spring 3 is in a compressed state, thereby making the left piston plate 1 and the right piston plate 2 maintain a movement tendency to move away from each other. Before the left piston plate 1 and the right piston plate 2 are installed inside the launch tube, the ends of the guide buckle 4 and the guide rod 5 are in the first position, at which time the guide buckle 4 and the guide rod 5 are in a mutually engaged and self-locking state, thereby making the left piston plate 1 and the right piston plate 2 in a locked state in which they can only move closer but not farther away from each other, and the guide spring 3 is compressed at the same time.

[0033] The left piston plate 1 and the right piston plate 2 in the self-locking state are installed inside the launch tube. At this time, the left piston plate 1 and the right piston plate 2 are squeezed by the wall of the launch tube and move closer to each other, thereby driving the guide buckle 4 and the guide pull rod 5 to move relative to each other to the second position. At this time, the guide buckle 4 and the guide pull rod 5 are unlocked, so that the left piston plate 1 and the right piston plate 2 can move away from each other. At this time, under the elastic force of the compressed guide spring 3, the left piston plate 1 and the right piston plate 2 move away from each other until the edges of the left piston plate 1 and the right piston plate 2 contact the wall of the launch tube respectively, so as to achieve the sealing between the walls of the launch tube. At the same time, after the launch tube is filled with high-pressure gas to push the piston to launch, since the left piston plate 1 and the right piston plate 2 are in a separated state, the left piston plate 1 and the right piston plate 2 are prevented from falling back to the bottom of the launch tube. In particular, in the case of vertical launch, the left piston plate 1 and the right piston plate 2 are further prevented from directly falling back to the bottom of the launch tube and colliding with the launch tube, thereby ensuring the safety and reliability of the launch tube and the launch piston.

[0034] Embodiment 2:

[0035] This embodiment is further optimized based on the above embodiment 1. Figure 1 As shown, the left piston plate 1 is provided with a guide groove 6, and the right piston plate 2 is provided with a guide member 7 extending into the inside of the guide groove 6 and slidably connected with the guide groove 6; the guide member 7 is provided with a mounting groove, and a guide buckle 4 is slidably installed in the mounting groove; a protrusion is provided on the side wall of the mounting groove, and the guide buckle 4 is provided with a bayonet engaged with the protrusion at one end close to the right piston plate 2.

[0036] The left piston plate 1 is provided with a guide groove 6, and the guide groove 6 is provided with an opening corresponding to the joint surface of the left piston plate 1. The right piston plate 2 is provided with a guide member 7 extending into the guide groove 6 and slidably connected with the guide groove 6. Through the sliding guide cooperation between the guide groove 6 and the guide member 7, the left piston plate 1 and the right piston plate 2 can move relative to each other smoothly in a direction perpendicular to the joint surface.

[0037] A slide rail parallel to the sliding direction of the guide member 7 is arranged inside the guide groove 6 on the left piston plate 1, and a slide groove slidably connected to the slide rail is arranged on the installation matching surface of the guide buckle 4 and the left piston plate 1. At the same time, a mounting groove that is freely slidably matched with the outer contour of the guide buckle 4 is arranged on the right piston plate 2. At the same time, a convex block protruding toward the inside of the mounting groove is arranged on the side wall of the mounting groove, and a bayonet that is engaged with the convex block is arranged on the end of the guide buckle 4. Through the engagement of the bayonet with the convex block, the guide buckle 4 can move synchronously with the right piston plate 2.

[0038] Further, such as Figure 2 , Figure 4 , Figure 7As shown, the left end of the bayonet is provided with a pressure inclined surface, and the right end of the bayonet is provided with a hook. The left side of the protrusion is provided with an extrusion inclined surface that matches the pressure inclined surface, and the right side of the protrusion is provided with a pressure end surface that matches the hook. When the right piston plate 2 moves relatively close to the left piston plate 1, the extrusion inclined surface squeezes the pressure inclined surface to the left, and the hook pushes the pressure end surface to the left, driving the guide buckle 4 to move in the direction close to the left piston plate 1. When the right piston plate 2 moves relatively away from the left piston plate 1, the pressure end surface pushes the hook to the right, driving the guide buckle 4 to move in the direction away from the left piston plate 1.

[0039] The other parts of this embodiment are the same as those of Embodiment 1, and thus will not be described in detail.

[0040] Embodiment 3:

[0041] This embodiment is further optimized on the basis of the above embodiment 1 or 2. Figure 1 As shown, a guide hole is also provided on the guide member 7, one end of the guide spring 3 is fixedly connected to the left piston plate 1, and the other end of the guide spring 3 extends to the inside of the guide hole and is slidably connected to the guide hole.

[0042] The inner wall of the guide hole matches the outer diameter of the guide spring 3, so that the guide spring 3 is deformed strictly in a direction perpendicular to the joint surface, ensuring that the left piston plate 1 and the right piston plate 2 move relative to each other strictly in a direction perpendicular to the joint surface.

[0043] Furthermore, two mutually parallel guide holes are arranged on the guide member 7, and two guide springs 3 are arranged between the left piston plate 1 and the right piston plate 2 corresponding to the two guide holes respectively.

[0044] The left end of the guide spring 3 is welded or clamped to the bottom of the guide groove 6 on the left piston plate 1, and the right end of the guide spring 3 is in contact with the bottom end surface of the guide hole.

[0045] The other parts of this embodiment are the same as those of the above-mentioned embodiment 1 or 2, and thus will not be described in detail.

[0046] Embodiment 4:

[0047] This embodiment is further optimized on the basis of the above embodiment 1 or 2. Figure 3 and Figure 5 As shown, a guide groove is provided on the guide buckle 4, and the end of the guide rod 5 extends to the inside of the guide groove and is slidably connected with the guide groove; a one-way bayonet 100 opening toward the right piston plate 2 is provided inside the guide groove, and the end of the guide rod 5 is self-locked with the one-way bayonet 100 at the first position, and the end of the guide rod 5 is disengaged from the one-way bayonet 100 and unlocked at the second position.

[0048] The left end of the guide rod 5 is rotatably connected to the mounting hole on the left piston plate 1, and the right end of the guide rod 5 extends to the inside of the guide groove and is slidably connected to the guide groove. The left end of the guide groove is an opening for the end of the guide rod 5 to enter, and the right end of the guide groove is respectively provided with a first sub-groove 001 and a second sub-groove 002 to form a Y-shaped guide structure, and a one-way bayonet 100 opening toward the right piston plate 2 is provided between the first sub-groove 001 and the second sub-groove 002.

[0049] When the guide buckle 4 accompanies the right piston plate 2 to move to the first position close to the left piston plate 1, the right end of the guide rod 5 slides into the first slot 001 and enters the one-way slot 100 under the guidance of the first slot 001, thereby realizing the locking connection between the end of the guide rod 5 and the one-way slot 100, so that the left piston plate 1 and the right piston plate 2 are in a self-locking state where they can continue to move closer but cannot continue to move away.

[0050] When the guide buckle 4 moves to the second position along with the right piston plate 2 further approaching the left piston plate 1, the right end of the guide rod 5 slides into the second slot 002 and escapes from the one-way bayonet 100 under the guidance of the second slot 002. At this time, the left piston plate 1 and the right piston plate 2 are unlocked, so that the left piston plate 1 and the right piston plate 2 can continue to move away from each other.

[0051] Furthermore, a guide wedge 200 protruding toward the one-way bayonet 100 is provided on the opening side of the one-way bayonet 100, and the guide wedge 200 includes a first guide surface and a second guide surface relatively arranged in a V-shape. The first guide surface guides the end of the guide rod 5 to the inside of the one-way bayonet 100 for self-locking in the first position, and the second guide surface guides the end of the guide rod 5 out of the one-way bayonet 100 for disengagement and unlocking in the second position.

[0052] The other parts of this embodiment are the same as any one of the above embodiments 1-3, so they are not repeated here.

[0053] Embodiment 5:

[0054] This embodiment is further optimized on the basis of the above embodiment 1 or 2. Figure 1 , Figure 2 , Figure 4 As shown, a return spring 8 is arranged between one end of the guide buckle 4 close to the right piston plate 2 and one side of the left piston plate 1 close to the right piston plate 2, and the return spring 8 is in a compressed state in both the first position and the second position.

[0055] A first clamping joint is arranged at one end of the guide buckle 4 close to the right piston plate 2, a second clamping joint is arranged at one end of the left piston plate 1 close to the joint surface, and a return spring 8 is installed between the first clamping joint and the second clamping joint.

[0056] When the ends of the guide buckle 4 and the guide rod 5 are in the self-locking state of the first position, the return spring 8 is compressed, thereby pulling the guide buckle 4 in the direction away from the guide rod 5. However, since the end of the guide rod 5 is locked with the guide buckle 4, the end of the guide rod 5 is firmly engaged in the one-way slot 100 at the right end of the guide buckle 4 under the pulling force of the return spring 8, thereby ensuring the stability of the self-locking state between the left piston plate 1 and the right piston plate 2.

[0057] When the ends of the guide buckle 4 and the guide rod 5 are in the unlocked state of the second position, since the end of the guide rod 5 has been disengaged from the one-way slot 100 at the right end of the guide buckle 4, the guide buckle 4 is moved away from the guide rod 5 under the pulling force of the return spring 8, so that the left piston plate 1 and the right piston plate 2 can move further away from each other.

[0058] The other parts of this embodiment are the same as any one of the above embodiments 1-4, so they are not repeated here.

[0059] Embodiment 6:

[0060] This embodiment is further optimized on the basis of the above-mentioned embodiment 1 or 2, and further includes an inner bracket, such as Figure 6 As shown, the inner bracket includes a left inner bracket 91 and a right inner bracket 92 , the left inner bracket 91 is connected to the left piston plate 1 , and the right inner bracket 92 is connected to the right piston plate 2 .

[0061] The left inner bracket 91 and the right inner bracket 92 are both made of high-strength lightweight aluminum alloy. The left inner bracket 91 is connected to the left piston plate 1 by connecting bolts, and the right inner bracket 92 is connected to the right piston plate 2 by connecting bolts. At the same time, there are card points on the end faces of the left inner bracket 91 and the right inner bracket 92 corresponding to the card positions on the tail wing of the drone, thereby realizing convenient connection with the tail wing of the drone. After the left piston plate 1 and the right piston plate 2 are installed inside the launch tube, the card positions on the tail wing of the drone are then carded and connected with the card points on the end faces of the left inner bracket 91 and the right inner bracket 92 respectively. Then, high-pressure air can be filled into the launch tube, and the left piston plate 1 and the right piston plate 2 are driven by the high-pressure air to eject along the tube wall, thereby realizing the launch of the drone.

[0062] A left sealing ring is provided between the left inner bracket 91 and the edge of the left piston plate 1 , and a right sealing ring is provided between the right inner bracket 92 and the edge of the right piston plate 2 .

[0063] The left sealing ring and the right sealing ring are respectively installed on the edges of the left piston plate 1 and the right piston plate 2 through connecting bolts. The left sealing ring and the right sealing ring are made of rubber material. The left sealing ring and the right sealing ring are respectively fitted with the wall of the launch tube to form a sealing structure to prevent a large amount of high-pressure air from leaking during launch.

[0064] A left piston component 101 is disposed on an end surface of the left inner bracket 91 away from the left sealing ring, and a right piston component 102 is disposed on an end surface of the right inner bracket 92 away from the right sealing ring.

[0065] The left piston member 101 and the right piston member 102 are used to position the UAV so that the tail wing of the UAV can be smoothly docked with the card points on the left inner bracket 91 and the right inner bracket 92.

[0066] The other parts of this embodiment are the same as any one of the above embodiments 1-5, so they are not repeated here.

[0067] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent change made to the above embodiment based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A separate firing piston, characterized in that: The invention comprises a left piston plate (1), a right piston plate (2) capable of moving relatively close to or away from the left piston plate (1), and a guide spring (3) arranged between the left piston plate (1) and the right piston plate (2); a guide buckle (4) is slidably arranged on the left piston plate (1), an end of the guide buckle (4) close to the right piston plate (2) is engaged with the right piston plate (2), and the guide buckle (4) moves to a first position or a second position relative to the left piston plate (1) with the right piston plate (2); a guide pull rod (5) is arranged on an end of the guide buckle (4) close to the left piston plate (1), an end of the guide pull rod (5) is engaged with the guide buckle (4) in a first position and is self-locked, and an end of the guide pull rod (5) is disengaged from the guide buckle (4) and unlocked in a second position.

2. A separate firing piston according to claim 1, characterized in that: The left piston plate (1) is provided with a guide groove (6), and the right piston plate (2) is provided with a guide member (7) extending into the guide groove (6) and slidably connected to the guide groove (6); the guide member (7) is provided with a mounting groove, in which a guide buckle (4) is slidably mounted; a convex block is provided on the side wall of the mounting groove, and a bayonet for engaging with the convex block is provided at one end of the guide buckle (4) close to the right piston plate (2).

3. A separate firing piston according to claim 2, characterized in that: The guide member (7) is also provided with a guide hole, one end of the guide spring (3) is fixedly connected to the left piston plate (1), and the other end of the guide spring (3) extends into the interior of the guide hole and is slidably connected to the guide hole.

4. A separate firing piston according to any one of claims 1 to 3, characterized in that: The guide buckle (4) is provided with a guide groove, and the end of the guide rod (5) extends into the interior of the guide groove and is slidably connected with the guide groove; a one-way bayonet (100) opening toward the right piston plate (2) is provided inside the guide groove, and the end of the guide rod (5) is self-locked with the one-way bayonet (100) at a first position, and is disengaged from the one-way bayonet (100) and unlocked at a second position.

5. A separate firing piston according to claim 4, characterized in that: The opening side of the one-way bayonet (100) is provided with a guide wedge (200) protruding toward the one-way bayonet (100), and the guide wedge (200) includes a first guide surface and a second guide surface arranged in a V-shape relative to each other, wherein the first guide surface guides the end of the guide rod (5) to the inside of the one-way bayonet (100) for self-locking in a first position, and the second guide surface guides the end of the guide rod (5) out of the one-way bayonet (100) for unlocking in a second position.

6. A separate firing piston according to claim 4, characterized in that: A return spring (8) is provided between an end of the guide buckle (4) close to the right piston plate (2) and a side of the left piston plate (1) close to the right piston plate (2), and the return spring (8) is in a compressed state in both the first position and the second position.

7. A separate firing piston according to any one of claims 1 to 3, characterized in that: It also comprises an inner bracket, the inner bracket comprising a left inner bracket (91) and a right inner bracket (92), the left inner bracket (91) being connected to the left piston plate (1), and the right inner bracket (92) being connected to the right piston plate (2).

8. A separate firing piston according to claim 7, characterized in that: A left sealing ring is provided between the left inner bracket (91) and the edge of the left piston plate (1), and a right sealing ring is provided between the right inner bracket (92) and the edge of the right piston plate (2).

9. A separate firing piston according to claim 8, characterized in that: A left piston component (101) is provided on an end surface of the left inner bracket (91) away from the left sealing ring, and a right piston component (102) is provided on an end surface of the right inner bracket (92) away from the right sealing ring.

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