Projectile limiting assembly and projectile propelling device

Abstract

The invention discloses a projectile limiting assembly and a projectile propelling device, relates to the field of electromagnetic launchers, and aims to improve the projectile feeding speed and stability. The projectile propelling device comprises a projectile limiting assembly and a propelling assembly. When the magazine is in place, the bullet limiting assembly acts on a second bullet in the magazine, the magazine is used for preparing the first bullet to a bullet loading position, and the second bullet is adjacent to the first bullet at the bullet loading position; the projectile limiting assembly works to apply acting force or counter-acting force deviating from the first projectile to the second projectile; and when the magazine is in place, the propelling assembly propels the first bullet at the bullet loading position to a designated position along the bullet loading channel. According to the invention, the friction force of the second projectile when the first projectile is loaded can be reduced, the loading speed is improved, the stability of the loading speed each time is ensured, and the loading stability is improved.

Description

Technical Field

[0001] The present invention relates to the field of electromagnetic launchers, in particular to a projectile limiting component and a projectile propulsion device. Background Art

[0002] The electromagnetic launcher for continuous shooting needs to be loaded successively through the projectile propulsion device, and the projectile propulsion device prepares the projectiles contained in the magazine to the loading position successively for the propulsion component to load.

[0003] Magazines are typically equipped with a spring that pushes the projectiles to the loading position, and to hold the projectiles down at the loading position, the spring's force is typically high. Alternatively, the magazine can be mounted upside down, where the combined force of the projectile's weight and the spring's force pushes the projectiles down to the loading position. The spring's force or the projectile's weight will be transmitted to the projectiles at the loading position via other projectiles. During loading, the projectiles at the loading position will generate significant friction with adjacent projectiles due to this spring force or the weight of other projectiles. The loading assembly must overcome this significant friction to load, resulting in significant energy waste, reduced effective power, and poor acceleration of the projectiles, slowing loading speed. Whether it's the spring force or the projectile's weight, both ultimately act as contact pressure from projectiles adjacent to the loading position onto the projectiles at the loading position. Therefore, the following description will use the spring force as a representative example, and will not separately describe the contact pressure caused by the projectile's weight when the magazine is inverted. And as the spring is released, different projectiles will be subjected to different elastic forces. Since the power of the loading assembly is relatively stable, different projectiles will obtain different accelerations, and the initial velocities of the projectiles entering the acceleration section will be different. The feeding stability is poor, which affects the reliability of the projectile launch. Summary of the Invention

[0004] The object of the present invention is to provide a projectile propulsion device and its magazine to improve the stability of ammunition feeding in order to solve all or part of the above problems.

[0005] The technical solution adopted in the present invention is as follows:

[0006] A projectile limiting assembly acts on a second projectile in a magazine when the magazine is in place; the magazine is used to accommodate ferromagnetic projectiles and prepare a first projectile to a loading position; the second projectile is adjacent to the first projectile at the loading position; the projectile limiting assembly works to apply an action force or reaction force to the second projectile away from the first projectile.

[0007] Optionally, the projectile limiting assembly includes an electromagnet located outside the magazine, and when the electromagnet is working, the projectile limiting assembly applies an action force or reaction force to the second projectile away from the first projectile.

[0008] Optionally, the electromagnet includes a magnetizer and an electromagnetic coil, and the electromagnetic coil surrounds the magnetizer; the magnetic field generated by the electromagnetic coil is transmitted to the opposite sides of the second projectile through the magnetizer.

[0009] Optionally, the magnet is a two-section separated structure, one end of the two sections forms a closed magnetic circuit through the second projectile, and the other end of the two sections forms a closed magnetic circuit outside the magazine.

[0010] Optionally, the magnetizer is an integrated structure, and the magnetizer forms a closed magnetic circuit through the second projectile.

[0011] Optionally, the magnetic conductor half surrounds the magazine, and two ends of the magnetic conductor are located on opposite sides of the magazine corresponding to the position of the second projectile.

[0012] Optionally, the magnet half surrounds the magazine, the magnet fully surrounds the magazine, the electromagnetic coils are at least two groups, and the two groups of electromagnetic coils are respectively located on opposite sides of the magazine. The magnet is set at a position relative to all projectiles and has the smallest air gap with the second projectile. The magnet is located within the range from the second projectile to the third projectile, and the third projectile is adjacent to the second projectile.

[0013] Optionally, the projectile limiting assembly also includes a first limiting structure arranged at the position of the second projectile, and the electromagnet is located axially outside the second projectile. The magnetic field generated by the electromagnet acts on the second projectile so that the second projectile is limited to the position of the first limiting structure.

[0014] Optionally, the projectile limiting assembly also includes a second limiting structure arranged at the position of the second projectile, and the electromagnet is located axially outside the second projectile. The magnetic field generated by the electromagnet acts on the second limiting structure to limit the second projectile.

[0015] The present invention also provides a projectile propulsion device, which includes a propulsion assembly and the above-mentioned projectile limiting assembly; the propulsion assembly is used to propel the first projectile at the loading position along the loading channel to a designated position when the magazine is in place.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0017] The present invention designs a pellet stop assembly for a magazine. The pellet stop assembly operates almost simultaneously with the propulsion assembly. When the propulsion assembly loads a first pellet at the loading position, the pellet stop assembly applies an action or reaction force to the adjacent second pellet, which acts away from the first pellet. This offsets the elastic force transmitted by the spring to the first pellet, reduces the frictional force exerted on the first pellet by the second pellet during loading, increases the effective power of the propulsion assembly, and thus improves the loading speed. Furthermore, the pellet stop assembly stabilizes the frictional force exerted on each first pellet, thereby ensuring that the forces exerted on each first pellet are uniform, ensuring the stability of the loading speed, and thus improving the stability of the feeding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will now be described by way of example with reference to the accompanying drawings, in which:

[0019] Figure 1 This is the core structure diagram of the existing electromagnetic launcher.

[0020] Figure 2 The present invention is a structural diagram of a projectile limiting assembly using a separate structured magnetic conductor in one embodiment.

[0021] Figure 3 The present invention is a structural diagram of an embodiment of a projectile limiting assembly using a semi-enclosed structure magnetic conductor.

[0022] Figure 4 It is a structural diagram of another embodiment of a projectile limiting assembly using a semi-enclosed structure magnetic conductor.

[0023] Figure 5 The present invention is a structural diagram of an embodiment of a projectile limiting assembly using a fully enclosed structured magnetic conductor.

[0024] Figure 6 It is a structural diagram of another embodiment of a projectile limiting assembly using a fully enclosed structure magnetic conductor.

[0025] Figure 7 1 is a structural diagram of a projectile limiting assembly of a downward pressing assembly adopting a first limiting structure in two embodiments.

[0026] In the figure, 1 is the first projectile, 2 is the second projectile, 3 is the first coil, 4 is the magnetic conductor, 5 is the second coil, 6 is the third coil, 7 is the support arm, 8 is the fourth coil, 9 is the fifth coil, 10 is the air gap, 11 is the electromagnet, 12 is the magazine, 13 is the bullet storage space, 14 is the electromagnetic force, 15 is the cavity, 16 is the inclined plane, 41 is the first magnetic conductor, 42 is the second magnetic conductor, 43 is the first end, 44 is the second end, 45 is the third end, and 46 is the fourth end. DETAILED DESCRIPTION

[0027] All features disclosed in this specification, or all steps in the disclosed methods or processes, except mutually exclusive features and / or steps, can be combined in any manner.

[0028] Any feature disclosed in this specification (including any appended claims and abstract), unless otherwise stated, may be replaced by other equivalent or similar features. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0029] like Figure 1 The core structure of a typical electromagnetic launcher in the prior art is shown, which includes a first coil 3 and a magazine 12 (not shown). The inner wall of the magazine 12 forms a bullet storage space 13. The projectiles are discharged at the loading position of the bullet storage space 13. The magazine 12 receives the ferromagnetic projectiles through the bullet storage space 13. For ease of shaping, the magazine 12 is usually made of plastic, but it is also possible to make it of metal. For ease of description, as shown in FIG. Figure 1 As shown, from top to bottom, the projectiles are referred to as the first projectile 1, the second projectile 2, the third projectile... The projectiles are adjacent to each other. Therefore, the first projectile 1 mentioned in the embodiment of the present application is the projectile prepared in the magazine 12 and placed in the loading position, and the second projectile 2 is the projectile adjacent to the first projectile 1. The position of the first projectile 1 at the top of the magazine 12 is called the loading position. The projectile at this loading position is coaxial with the loading channel of the propulsion assembly, and the magazine 12 outputs the projectiles from this loading position into the loading channel. The propulsion assembly, through the magnetic field of the first coil 3, propels the first projectile 1 at the loading position along the loading channel to a designated position. Typically, the magazine 12 (via a spring) prepares the projectiles to the loading position from the side of the loading channel (e.g., radially of the loading channel).

[0030] See also Figure 1 Under the action of the spring at the bottom of the magazine 12, through the transmission of each projectile, the second projectile 2 will exert an X-axis pressure on the first projectile 1, which is the transmitted spring force. The first projectile 1 will be propelled into the assembly for loading from the Z-axis direction, and will therefore be subjected to a friction force from the second projectile 2 in the -Z-axis direction. Because the spring force needs to ensure the reliability of ammunition feeding, the spring force is usually not too small, between 5N and 20N. Therefore, the friction force exerted on the first projectile 1 from the second projectile 2 cannot be ignored. Moreover, the fluctuation of this spring force will cause the acceleration of the propulsion assembly on each first projectile 1 (each projectile reaching the loading position) to be different, resulting in a different initial velocity of each first projectile 1 during the acceleration phase, affecting the reliability of the launch.

[0031] To avoid the problem of unstable feeding caused by spring elastic force, the embodiment of the present application reduces the friction force on the first projectile 1 by reducing the contact pressure of the second projectile 2 on the first projectile 1 during loading. The embodiment of the present application provides a projectile limiting assembly that acts on a magazine 12. The inner wall of the magazine 12 forms a projectile storage space 13. The projectile is output to the propulsion assembly at the loading position where the projectile storage space 13 is opened. The magazine 12 accommodates ferromagnetic projectiles through the projectile storage space 13. Since the elastic force is ultimately applied to the first projectile 1 through the second projectile 2, the projectile limiting assembly acts on the second projectile in the magazine 12 when the magazine 12 is in place. The so-called magazine 12 in place refers to the state when the magazine 12 is installed in the magazine compartment of the electromagnetic launcher. The projectile limiting assembly works to apply an action force or reaction force to the second projectile 2 that is away from the first projectile 1. This counteracts the spring force and prevents it from being transmitted to the first projectile 1 at the loading position. This reduces friction and ensures the stability of the force applied to the first projectile 1 at the loading position, making the initial loading speed of each first projectile 1 consistent and ensuring stable feeding. The force exerted by the projectile stop assembly on the second projectile is considered an action force, while the force exerted by the projectile stop assembly on the second projectile 2 in response to the pressure of the second projectile 2 is considered a reaction force.

[0032] In some embodiments, the projectile limiting assembly includes an electromagnet located outside the magazine. When the electromagnet is working, the projectile limiting assembly applies an action force or a reaction force to the second projectile 2 away from the first projectile 1.

[0033] In some embodiments, the electromagnet of the projectile limiting assembly includes a magnetizer 4 and an electromagnetic coil. The electromagnetic coil surrounds the magnetizer 4. When the electromagnetic coil is energized, the magnetic field generated by the electromagnetic coil is concentratedly conducted through the magnetizer 4. When the magazine 12 is in place, the magnetic field generated by the electromagnetic coil is conducted to the opposite sides of the second projectile 2 in the magazine 12 through the magnetizer 4. The magnetizer 4 is between the second projectile 2 and the third projectile, closer to the second projectile 2 (that is, the air gap 10 between the magnetizer 4 and the second projectile 2 relative to all the projectiles is the smallest, so that the downward pressure on the second projectile 2 is the largest). The third projectile is adjacent to the second projectile 2. Since the second projectile 2 is ferromagnetic and the second projectile 2 can reduce the air gap 10 between the magnetizers 4 and reduce the magnetic resistance of the magnetizers 4 at the position of the second projectile 2, the magnetic field transmitted by the magnetizers 4 to both sides of the magazine 12 completes the magnetic circuit closure through the second projectile 2, thereby generating an electromagnetic force on the second projectile 2 in the -X axis direction (i.e., away from the direction of the first projectile 1) to offset the spring force.

[0034] Regarding the structure of the electromagnet, in some possible embodiments, the magnetizer 4 adopts a two-section separated structure, with one end of the two sections (magnetizers) forming a closed magnetic circuit through the second projectile 2, while the other end of the two sections (magnetizers) forms a closed magnetic circuit outside the magazine 12. This design prevents the structure between the two ends of the magnetizer 4 located outside the magazine 12 from interfering with each other, facilitating the overall planning and layout of the mechanical structure. In addition, these two ends can guide the magnetic field of the electromagnetic coil to other locations for reuse, or even reuse the electromagnetic coil surrounding the magnetizer 4.

[0035] like Figure 2 As shown, in one possible embodiment, the magnet 4 is divided into a first magnet 41 and a second magnet 42. The first magnet 41 and the second magnet 42 are respectively located on either side of the magazine 12, and are preferably arranged in a symmetrical structure. In the embodiment of the present application, the two ends of the first magnet 41 are referred to as the first end 43 and the third end 45, and the two ends of the second magnet 42 are referred to as the second end 44 and the fourth end 46. The third end 45 of the first magnet 41 and the fourth end 46 of the second magnet 42 are located on opposite sides of the magazine 12 corresponding to the position of the second projectile 2. The first end 43 of the first magnet 41 and the second end 44 of the second magnet 42 form a closed magnetic circuit outside the magazine 12. The first magnet 41 and the second magnet 42 are outside the magazine 12, and the magnetic circuit can be closed by connecting or approaching other magnets, for example, with the help of the first projectile 1.

[0036] In this embodiment, electromagnetic coils are preferably wrapped around the first magnetic conductor 41 and the second magnetic conductor 42 to generate a sufficient magnetic field. For example, the second coil 5 can be wrapped around the first magnetic conductor 41, and the third coil 6 can be wrapped around the second magnetic conductor 42. As for the coil wrapping positions, it is possible to consider placing the second coil 5 at the third end 45 of the first magnetic conductor 41 and the third coil 6 at the fourth end 46 of the second magnetic conductor 42 to maximize the electromagnetic force acting on the second projectile 2. Of course, it is also possible to place the second coil 5 at the first end 43 of the first magnetic conductor 41 and the third coil 6 at the second end 44 of the second magnetic conductor 42, etc.

[0037] As a feasible approach, a support arm 7 can be provided on the third end 45 of the first magnet 41 and / or on the fourth end 46 of the second magnet 42, with the support arm 7 facing the position corresponding to the second projectile 2, so as to minimize the air gap 10 between the magnet 4 and the second projectile 2. Wrapping the coil (the second coil 5 or the third coil 6) around the support arm 7 (if any) can increase the magnetic field strength acting on the second projectile 2.

[0038] In other embodiments, the magnetizer 4 of the electromagnet adopts an integrated structural design to facilitate installation and maintenance. The magnetizer 4 of this structure also forms a closed magnetic circuit through the second projectile 2, generating an electromagnetic force on the second projectile 2 in a direction away from the first projectile 1. The difference from the magnetizer 4 of the aforementioned separate structure is that the magnetizer 4 of this embodiment achieves magnetic circuit closure by itself outside the magazine 12. It should be noted that the so-called integrated structure is a structure in which the magnetizer 4 completes the magnetic circuit closure by itself outside the magazine 12. It does not mean a structure that must be processed as an integrated whole. It can be composed of multiple parts, and there can be gaps between the parts, but all parts need to be used as a whole. The separate structure is opposite to this, and the magnetic circuit closure is also achieved by other magnetizers outside the magazine 12. The other magnetizers here can be other projectiles besides the second projectile.

[0039] As a possible implementation, the magnet 4 half surrounds the magazine 12, and the two ends of the magnet 4 are respectively located on the opposite sides of the position of the second projectile 2 of the magazine 12, so that when the magazine 12 is in place, the magnetic circuit is closed through the second projectile 2, thereby generating downward pressure on the second projectile 2.

[0040] The semi-enclosed magnetizer 4 can refer to the separate structure embodiment described above, with the second coil 5 and the third coil 6 respectively wrapped around the two ends of the magnetizer 4 (in this case, only the two ends located on both sides of the magazine 12). In addition, a support arm 7 can be connected to at least one of the two ends of the magnetizer 4, with the support arm 7 facing the direction of the second projectile 2, and then the coil connected to the end of the support arm 7 can be wrapped around the support arm 7. Figure 3 The figure shows a schematic diagram in which support arms 7 are connected to both ends of the magnetic conductor 4 , and the second coil 5 and the third coil 6 are respectively wrapped around the support arms 7 on both sides.

[0041] As an alternative or combinable embodiment, Figure 4 As shown, the ends of the magnetizer 4 are still located on opposite sides of the magazine 12 corresponding to the position of the second projectile 2. A fourth coil 8 can be wrapped around the middle of the magnetizer 4, thereby reserving more space on both sides of the magazine 12 for other mechanical design features. Of course, the fourth coil 8 can be implemented in combination with the second coil 5 and the third coil 6. In this embodiment, a support arm 7 can still be connected to one or both ends of the magnetizer 4, facing the position of the second projectile 2.

[0042] In another possible embodiment, the magnetizer 4 can be designed to fully surround the magazine 12. To avoid possible magnetic short circuits, the electromagnetic coils are designed into at least two groups, each located on opposite sides of the magazine 12. This allows any one of the electromagnetic coils to close the magnetic circuit through the second projectile 2, thereby generating a balanced electromagnetic field acting on the second projectile 2. The magnetizer 4 is positioned at a location with the smallest air gap 10 relative to the second projectile 2 among all the projectiles. The location with the smallest air gap 10 between the magnetizer 4 and each projectile (i.e., the location where the electromagnetic force is applied to the projectiles) is located between the second projectile 2 and the third projectile 3. For example, when the magnetizer 4 is connected to the support arm 7, this location is the end face of the support arm 7, thereby ensuring that the magnetic circuit is closed through the second projectile 2 and generating a downward electromagnetic force on the second projectile 2.

[0043] As a feasible embodiment, the magnetic conductor 4 adopts an O-shaped structure to surround the magazine 12. The magnetic conductor 4 is located on the left and right sides of the second projectile 2 in the axial direction, and surrounds the second coil 5 and the third coil 6 respectively. Figure 5 As shown, in the embodiment where the magnetic conductor 4 is located on both axial left and right sides of the second projectile 2 and is connected to support arms 7 , the second coil 5 and the third coil 6 are respectively wrapped around the two support arms 7 .

[0044] As another feasible embodiment, the magnetic conductor 4 also adopts an O-shaped structure to surround the magazine 12. The magnetic conductor 4 is located on the front and rear sides of the second projectile 2 in the axial direction, and surrounds the fourth coil 8 and the fifth coil 9 respectively. Figure 6 As shown, in the embodiment where the magnetic conductor 4 is located on both axial left and right sides of the second projectile 2 and is connected to the support arms 7, the fourth coil 8 and the fifth coil 9 are respectively wrapped around the axial front and rear sides of the second projectile 2.

[0045] It should be noted that Figure 5 and Figure 6 Although the embodiments show an embodiment in which the support arm 7 is connected to the magnetic conductor 4, in practice, the support arm 7 is not a necessary feature. The support arm 7 may be absent or may be connected to only one side, and the winding method of the corresponding coil is adjusted accordingly.

[0046] In addition, as the magnet 4 that fully surrounds the magazine 12, its O-shaped structure is not required to be a complete whole, and can be composed of two sections of C-shaped magnets, two sections of U-shaped magnets, two sections of E-shaped magnets, or a pair of EI-shaped magnets.

[0047] The projectile limiting assembly of the present application offsets the elastic force of the spring by limiting the second projectile 2. In addition to directly pressing down the second projectile 2 by generating electromagnetic force, the second projectile 2 can also be limited by cooperating with the physical structure.

[0048] In some embodiments, the projectile limiting assembly further includes a first limiting structure disposed at the position of the second projectile 2. The electromagnet 11 is located axially outward from the second projectile 2. The magnetic field generated by the electromagnet 11 acts on the second projectile 2, so that the second projectile 2 is limited to the position of the first limiting structure, thereby preventing the second projectile 2 from transmitting elastic force to the first projectile 1. When the first projectile 1 is loaded, the electromagnet 11 releases the second projectile 2. At this time, the second projectile 2 is no longer restricted by the first limiting structure. The second projectile 2 is then prepared to the loading position under the action of the spring of the magazine 12, becoming the first projectile 1 for the next loading, and the cycle continues.

[0049] like Figure 7 As shown, in some possible embodiments, the first limiting structure is a cavity 15 formed by bulging the inner wall of the magazine 12 outward, as shown in FIG. Figure 7 (a) or an inclined surface designed to face inwards and obliquely downwards, such as Figure 7 As shown in (b), when the electromagnet 11 is operating, the second projectile 2 is laterally attracted (or repelled) by the electromagnetic force 14 toward the cavity 15 or toward the inclined surface. Limited by the inner wall of the magazine 12, the second projectile 2 is unable to transmit the spring force to the first projectile 1.

[0050] In other feasible embodiments, the projectile limiting assembly can use a mechanical structure to apply an action force or reaction force to the second projectile 2 away from the first projectile 1. The projectile limiting assembly includes a second limiting structure provided at the position of the second projectile 2, and the electromagnet 11 is located axially outside the second projectile 2. The magnetic field generated by the electromagnet 11 acts on the second limiting structure so that the second limiting structure limits the second projectile 2. The second limiting structure is, for example, a telescopic limiting mechanism such as a telescopic rod or a lock tongue provided on the magazine 12 at a position corresponding to the top of the second projectile 2. The electromagnet 11 is driven to extend when energized and reset and retract when de-energized; it can also be a rotary limiting structure such as a rotary hinge, which expands when energized to limit the second projectile 2 and resets and retracts when de-energized; or it can be a deformable limiting structure that deforms when the electromagnet 11 is energized and resets when de-energized, etc. In this application, no specific restrictions are made.

[0051] The projectile retaining assembly of the various embodiments described above can be designed in various ways: simply by using electromagnetic force to press down the second projectile 2 to reduce the contact pressure on the first projectile 1; by modifying the inner wall of the magazine to cooperate with an electromagnet to reduce the contact pressure of the second projectile 2 on the first projectile 1; and by adding a mechanical device in the position of the second projectile 2 to reduce the contact pressure of the second projectile 2 on the first projectile 1. Regardless of the method, it can be applied to the projectile propulsion device. After the magazine 12 is positioned in the magazine compartment of the propulsion assembly, the propulsion assembly propels the first projectile 1 at the loading position of the magazine 12 along the loading channel to the designated position, completing the loading. The propulsion assembly typically generates a magnetic field by a first coil 3 adjacent to the loading position to accelerate the first projectile 1 from a stationary state along the loading channel, drawing the first projectile 1 out of the magazine 12, thereby completing the loading. The magazine 12 prepares the projectile to the loading position from the side of the loading channel. The so-called lateral direction means that the magazine 12 is not fed along a direction coaxial with the loading channel, but the feeding path is fed along the radial direction of the loading channel or in a direction where a radial decomposition vector exists.

[0052] The present invention is not limited to the aforementioned specific embodiments, but extends to any new features or any new combination disclosed in this specification, as well as any new method or process steps or any new combination disclosed.

Claims

1. A projectile stop assembly, which acts on a second projectile in a magazine when the magazine is in place; the magazine is used to accommodate ferromagnetic projectiles and prepare a first projectile to a loading position; the second projectile is adjacent to the first projectile at the loading position; characterized in that: The projectile limiting assembly works to apply an action force or a reaction force to the second projectile away from the first projectile.

2. The projectile limiting assembly according to claim 1, characterized in that: The projectile limiting assembly includes an electromagnet located outside the magazine. When the electromagnet is working, the projectile limiting assembly applies an action force or a reaction force to the second projectile away from the first projectile.

3. The projectile limiting assembly according to claim 2, characterized in that: The electromagnet includes a magnetizer and an electromagnetic coil, wherein the electromagnetic coil surrounds the magnetizer; the magnetic field generated by the electromagnetic coil is transmitted to the opposite sides of the second projectile through the magnetizer.

4. The projectile limiting assembly according to claim 3, characterized in that: The magnetic conductor is a two-section separated structure, one end of the two sections forms a closed magnetic circuit through the second projectile, and the other end of the two sections forms a closed magnetic circuit outside the magazine.

5. The projectile limiting assembly according to claim 3, characterized in that: The magnetic conductor is an integrated structure, and the magnetic conductor forms a closed magnetic circuit through the second projectile.

6. The projectile limiting assembly according to claim 5, characterized in that: The magnetic conductor half surrounds the magazine, and two ends of the magnetic conductor are respectively located at two opposite sides of the magazine corresponding to the position of the second projectile.

7. The projectile limiting assembly according to claim 5, characterized in that: The magnet half surrounds the magazine, the magnet fully surrounds the magazine, the electromagnetic coils are at least two groups, and the two groups of electromagnetic coils are respectively located on opposite sides of the magazine. The magnet is set at a position with the smallest air gap with the second projectile among all the projectiles. The magnet is located in the range from the second projectile to the third projectile, and the third projectile is adjacent to the second projectile.

8. The projectile limiting assembly according to claim 2, characterized in that: The projectile limiting assembly also includes a first limiting structure arranged at the position of the second projectile, the electromagnet is located axially outside the second projectile, and the magnetic field generated by the electromagnet acts on the second projectile so that the second projectile is limited at the position of the first limiting structure.

9. The projectile limiting assembly according to claim 2, characterized in that: The projectile limiting assembly also includes a second limiting structure arranged at the position of the second projectile, the electromagnet is located axially outside the second projectile, and the magnetic field generated by the electromagnet acts on the second limiting structure to limit the second projectile.

10. A projectile propulsion device, characterized in that: It comprises a propulsion assembly and a projectile limiting assembly as described in any one of claims 1 to 9; the propulsion assembly is used to propel the first projectile at the loading position along the loading channel to a designated position when the magazine is in place.

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